Abstract:
A network system for monitoring and storing data of aircraft intelligent windows or windshields to provide useable life of, provide real life performance of, and/or measure characteristics and/or properties of, the windshields forwards the data from sensors mounting the windshield to a window sensing hub having a microprocessor programed to receive and process the data to determine the performance of the windshield and formatting the data in accordance to a preset program, wherein the program includes providing data from the sensors that measures characteristics and properties of the windshield that are active during the period in which the data is taken. An aircraft central maintenance system connected to the window sensing hub receives the formatted information from the window sensing hub and unfiltered or unformatted information, wherein the unfiltered information from the windshield is acted on by the central maintenance system to provide an estimated useable life of the windshield.

Description:
RELATED APPLICATION 
       [0001]    This application claims the benefit of the filing date of U.S. Provisional Application Ser. No. 61/678,315 filed on Aug. 1, 2012 in the names of Yu Jiao, Nicolas Duarte and Monroe A. Stone for an “Aerospace Intelligent Window System”. Application Ser. No. 61/678,315 in its entirety is hereby incorporated by reference. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    This invention relates to an aerospace intelligent window system that includes performance data of one or more currently mounted windows in an aircraft (present performance data), and performance data of one or more previously mounted windows in the same aircraft and/or other aircrafts (past performance data) wherein the present and/or past performance data is used to determine life expectance of the one or more currently mounted windows. 
         [0004]    2. Presently Available Technology 
         [0005]    The present technology relating to sensors for aircraft windows, e.g. an aircraft windshield provides for mounting one or more sensors on an aircraft window and connecting the sensor output to a monitoring system mounted on the aircraft to provide instant performance data of selected properties or characteristics of the window. For a detailed discussion of sensors monitoring performance of selected properties and/or characteristics of aircraft windows reference is directed to U.S. Patent Application Publication Nos. 2010/0163675 A1, and 2013/075,531A1. The sensors, e.g. an impact sensor, a rupture sensor, an arc sensor, a temperature sensor and/or a moisture sensor, mounted on the aircraft window provide information relating to the performance of the window to determine if the performance is operating within acceptable limits. When the window performance is outside of acceptable limits, the window is repaired or replaced, e.g. as disclosed in U.S. Pat. No. 8,155,816 B2. U.S. Pat. No. 8,155,816 B2, and U.S. Patent Application Publication Nos. 2010/0183675 A1 and 2013/075,531A1 in their entirety are hereby incorporated by reference. 
         [0006]    Although the present system to monitor performance of an aircraft window is acceptable, there are limitations. More particularly, one limitation of the presently available systems is that the data from the sensors provide information regarding actual performance of the aircraft window, e.g. but not limited to an aircraft windshield but little, if any, information regarding the useable life or life expectancy of the aircraft window. Another limitation of the present system is that the data is presented as information for each aircraft window as a separate unit, and the interaction between aircraft windows is not fully taken into account. As can now be appreciated by those skilled in the art, it would be advantageous to consider interconnect output of the sensors of aircraft windows mounted in the body of an airplane to form a network of windows. In this manner the performance of the network of windows can be monitored, and the present and past performance of the network of windows of the aircraft can be considered to determine useable life or life expectance of the windows of the network of windows and determine if the window failure is a result of the window construction or an indication that a portion of the aircraft body and/or the window mount surrounding the aircraft window is causing the window to perform outside of an acceptable range. 
       SUMMARY OF THE INVENTION 
       [0007]    This invention relates to a network system for monitoring and storing performance data of a transparency to provide estimated useable life of the transparency and/or to provide real life performance of the transparency. The transparency includes but is not limited to a transparent sheet having a sensor group secured on a surface of the sheet to measure predetermined characteristics and/or properties of the transparency, wherein the sensor group includes, but is not limited to at least one sensor selected from the family of sensors including, but not limited to an arc sensor for measuring arcing of an electrically heatable member mounted on a surface of the transparent sheet, hereinafter referred to as an “arc sensor”; a heat sensor for measuring temperature of the heatable member, hereinafter referred to as a “heat sensor”; a moisture sensor for measuring moisture content on a surface of the transparent sheet, hereinafter referred to as a “moisture sensor”; an impact sensor for measuring force of impact of objects hitting a surface of the transparent sheet, hereinafter referred to as an “impact sensor”, and a sensor for identifying fractures in and/or on the transparent sheet, hereinafter referred to as a “crack sensor”. 
         [0008]    The network system includes, but is not limited to a window sensing hub comprising a microprocessor to receive output of the sensor group of each of the transparencies, wherein the microprocessor is programed to receive data from the sensor group of the transparency providing information on the performance of the property and characteristic of the transparency associated with the sensor group and formatting the received data in accordance to a preset program, wherein the program includes at least providing data from the sensor group of the transparent sheet that measure characteristics and properties of the transparency that are active during the period in which the data taken is of interest, and a central maintenance system connected to the window sensing hub to receive the formatted information from the window sensing hub and unfiltered information, wherein the unfiltered information from the transparent sheet is acted on by the central maintenance system to provide an estimated useable life of the transparency. 
         [0009]    This invention further relates to a transparency network inspection system, including, but not limited to a plurality of transparencies, each transparency comprising a pair of sheets laminated together and a sensor group to measure predetermined characteristics and/or properties of the transparency, wherein the sensor group comprises at least one sensor selected from the family of sensors comprising an arc sensor for measuring arcing of an electrically heatable member; a heat sensor for measuring temperature of the heatable member; a moisture sensor for measuring moisture content between the sheets of the transparency, an impact sensor for measuring force of impact of objects hitting outer surface of the transparency, and a fracture sensor for identifying fractures in a sheet of the transparency, and a central monitoring system comprising a microprocessor to receive output of the sensor group of each of the transparencies, wherein the microprocessor is programed to receive data from the sensor group of each transparency providing information on the performance of the property and characteristic of the transparency associated with the sensor group and formatting the received data in accordance to a preset program, wherein the program includes at least providing data from sensors that measure characteristics and properties of the transparency that are active during the period in which the data taken is of interest, and to act on the formatted information and unfiltered information to provide an estimated useable life of the transparency. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is an isometric view of an aircraft that can be used in the practice of the invention. 
           [0011]      FIG. 2  is a cross sectional view of a non-limiting embodiment of an aircraft intelligent window used in the practice of the invention, 
           [0012]      FIG. 3  is a non-limiting embodiment of a schematic of a network of aircraft intelligent windows of the invention. 
           [0013]      FIG. 4  is another non-limiting embodiment of a schematic of a network of aircraft intelligent windows of the invention. 
           [0014]      FIG. 5  is still another non-limiting embodiment of a schematic of a network of aircraft intelligent windows of the invention, 
           [0015]      FIG. 6  is a schematic of a system of the invention for monitoring the output signals of sensors or detectors of the aircraft intelligent windows in accordance to the teachings of the invention, 
           [0016]      FIG. 7  is a schematic of a system for scheduling repairs to, or replacements of, aircraft intelligent windows that are performing outside of acceptable limits. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0017]    As used herein, spatial or directional terms, such as “left”, “right”, “inner”, “outer”, “above”, “below”, and the like, relate to the invention as it is shown in the drawing figures. However, it is to be understood that the invention can assume various alternative orientations and, accordingly, such terms are not to be considered as limiting. Further, as used herein, all numbers expressing dimensions, physical characteristics, processing parameters, quantities of ingredients, reaction conditions, and the like, used in the specification and claims are to be understood as being modified in all instances by the term “about”. Accordingly, unless indicated to the contrary, the numerical values set forth in the following specification and claims can vary depending upon the desired properties sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical value should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Moreover, all ranges disclosed herein are to be understood to encompass the beginning and ending range values and any and all subranges subsumed therein. For example, a stated range of “1 to 10” should be considered to include any and all subranges between (and inclusive of) the minimum value of 1 and the maximum value of 10; that is, all subranges beginning with a minimum value of 1 or more and ending with a maximum value of 10 or less, e.g., 1 to 3.3, 4.7 to 7.5, 5.5 to 10, and the like. Further, as used herein, the terms “formed over”, “applies over”, “deposited over”, or “provided over” mean formed, applied, deposited, or provided on but not necessarily in contact with the surface. For example, a coating layer “formed over” a substrate does not preclude the presence of one or more other coating layers or films of the same or different composition located between the formed coating layer and the substrate. 
         [0018]    Before discussing non-limiting embodiments of the invention, it is understood that the invention is not limited in its application to the details of the particular non-limiting embodiments shown and discussed herein since the invention is capable of other embodiments. Further, the terminology used herein to discuss the invention is for the purpose of description and is not of limitation. Still further, unless indicated otherwise in the following discussion, like numbers refer to like elements. The non-limited embodiments of the invention discussed herein are directed to an intelligent window system for a vehicle, e.g. but not limited to an aircraft windshield that includes, among other things, a plurality of windows; selected ones of the plurality of windows having one or more sensors to monitor the performance of properties of the window, and an aircraft central monitoring system (hereinafter also referred to as an aircraft “CMS”, or an “ACMS”) to receive data from the sensors to estimate useable life of the selected ones of the plurality of windows having a sensor. 
         [0019]    With reference to  FIG. 1 , non-limiting embodiments of the invention will be directed to an aircraft laminated transparency, e.g. but not limited to a right side windshield  10 , a left side windshield  11  (numbered but not shown in  FIG. 1 ), a right front windshield  12 , and a left front windshield  13 , of aircraft  15 . The invention, however, is not limited to any particular type of aircraft transparency, and the invention contemplates the practice of the invention on aircraft cabin windows  18 , e.g. but not limited to aircraft windows of the type having a medium responsive to electric stimuli to increase or decrease visible transmission, e.g. but not limited to the type of window disclosed in U.S. Published Patent application 2007/0002422A1 and on aircraft windows of the type having an insulated air space between a pair of laminated sheets. The entire disclosure of U.S. Published Patent Application 2007/0002422A1 is hereby incorporated by reference. Further, the invention can be practiced on commercial and residential windows, e.g. but not limited to types disclosed in U.S. Pat. No. 5,675,944, which patent in its entirety is hereby incorporated by reference; a window for any type of land vehicle; a canopy, and windshield for any type of air and space vehicle, a window for any above or below water vessel, and a window for a viewing side or door for any type of containers, for example but not limited to a refrigerator, cabinet and/or oven door. 
         [0020]    Shown in  FIG. 2  is a non-limiting embodiment of an aircraft intelligent window (hereinafter also referred to as “AIW”)  20 , e.g. but not limited to a laminated aircraft windshield  20  that can be used in the practice of the invention. The AIW or windshield  20  includes a first glass sheet  22  secured to a second glass sheet  24  by a first interlayer  26 ; the second sheet  24  secured to a second vinyl-interlayer or sheet  28  by a first urethane interlayer  30 , and the second vinyl-interlayer  28  secured to a heatable member  32  by a second urethane interlayer  34 . An edge member or moisture barrier  36  of the type used in the art, e.g. but not limited to a silicone rubber or other flexible durable moisture resistant or impervious material is secured to (1) peripheral edge  38  of the windshield  20 , i.e. the peripheral edge  38  of the first and second sheets  22 ,  24 ; of the first and second vinyl-interlayers  26 ,  28 ; of the first and second urethane interlayers  30 ,  34  and of the heatable member  32 ; (2) margins or marginal edges  40  of outer surface  42  of the windshield, i.e. the margins  40  of the outer surface  42  of the first glass sheet  22  of the windshield  20 , and (3) margins or marginal edges  44  of outer surface  46  of the windshield  20 , i.e. margins of the outer surface  46  of the heatable member  32 . 
         [0021]    As is appreciated by those skilled in the art, and not limiting to the invention, the first and second glass sheets  22 ,  24 ; the first and second vinyl-interlayers  26 ,  28  and the first urethane interlayer  30  form the structural part, or inner segment, of the windshield  20  and the outer surface  42  of the windshield  20  faces the interior of the aircraft  14 , and the second urethane layer  34  and the heatable member  32  form the non-structural part, or outer segment, of the windshield  20 , and the surface  46  of the windshield  20  faces the exterior of the aircraft  15 . The heatable member  32  provides heat to remove fog from, and/or to melt ice on, the outer surface  46  of the windshield  20 . 
         [0022]    The invention is not limited to the construction of the AIW or windshield  20  and any of the constructions of aircraft transparencies used in the art can be used in the practice of the invention. For example and not limiting to the invention, the windshield  20  can include a construction wherein the vinyl interlayer  28  and the urethane interlayer  30  are omitted, and/or the sheets  22  and  24  are plastic sheets. 
         [0023]    Further, the invention is not limited to the design and/or construction of the heatable member  32 , and any electrically conductive heatable member used in the art to heat a surface of a sheet to melt ice on, and/or remove fog from the surface of the sheet can be used in the practice of the invention. In general, the heatable member  32  includes a glass sheet  60  having a conductive coating  62  applied to surface  64  of the glass sheet  60 , and a pair of spaced bus bars  66 ,  68  in electrical contact with the conductive coating  62 . The invention is not limited to the composition of the conductive coating  62 , for example and not limiting to the invention the conductive coating  62  can be made from any suitable electrically conductive material. Non-limiting embodiments of conductive coatings that can be used in the practice of the invention include, but are not limited to, a pyrolytic deposited fluorine doped tin oxide film of the type sold by PPG Industries, Inc. under the registered trademark NESA; a magnetron sputter deposited tin doped indium oxide film of the type sold by PPG Industries, Inc. under the registered trademark NESATRON; a coating made up of one or more magnetron sputter deposited films, the films including, but not limited to a metal film, e.g. silver between metal oxide films, e.g. zinc oxide and/or zinc stannate, each of which may be applied sequentially by magnetron sputtering, e.g. as disclosed in U.S. Pat. Nos. 4,610,771; 4,806,220 and 5,821,001, the disclosures of which in their entirety are hereby incorporated by reference. The invention also contemplates a heatable member  32  using spaced electrically conductive wires. Heatable members to remove ice and snow from the aircraft windshield are well known in the art, and no further discussion is deemed necessary. 
         [0024]    Generally the glass sheets  22 ,  24  and  60  of the windshield  20  are dear chemically strengthened lithium containing glass sheets; however, the invention is not limited thereto, and the glass sheets can be heat strengthened or heat tempered conventional soda-lime-silicate glass or borosilicate glass sheets. Further as is appreciated, the invention is not limited to the number of glass sheets, vinyl interlayers or urethane interlayers that make up the windshield  20  and the windshield  20  can have any number of sheets and/or interlayers. 
         [0025]    Still further, the invention is not limited to the construction of the windshield  20  and any of the constructions of aircraft transparencies used in the art can be used in the practice of the invention. For example and not limiting to the invention, the windshield  20  can include a construction wherein the second vinyl-interlayer  28  and the first urethane interlayer  30  are omitted, and/or the glass sheets  22  and  24  are plastic sheets. Further, the cross section of the window  20  shown in  FIG. 1  shows flat or non-shaped sheets, the invention is not limited thereto, and the window  20  can have a contour to match the contour of the outer surface of the aircraft in which the window is mounted, e.g. the aircraft  15  shown in  FIG. 1 . 
         [0026]    In addition, the invention is not limited to the material of the layers or sheets of the transparency, and the layers or sheets can be made of, but not limited to, cured and uncured plastic sheets; annealed, heat strengthened, and heat and chemically strengthened, clear, colored, coated and uncoated glass sheets. Still further the invention can be practiced on windows having opaque sheets, e.g. but not limited to wood and metal sheets, and glass sheets having an opaque coating, and combinations thereof. In the preferred practice of the invention, the sheets  22 ,  24  and  60  are transparent dear glass sheets. By “clear glass” is meant non-tinted or non-colored glass. The glass sheets can be conventional float glass, and can be of any composition having any optical properties, e.g., any value of visible transmission, ultraviolet transmission, infrared transmission, and/or total solar energy transmission. By “float glass” is meant glass formed by a conventional float process. Examples of float glass processes are disclosed in U.S. Pat. Nos. 4,744,809 and 8,094,942, which patents in their entirety are hereby incorporated by reference. 
         [0027]    In the preferred practice of the invention, the AIW or the windshield  20  has one or more sensors to monitor one or more properties of the window to determine if the window is operating within an acceptable performance range, and to take appropriate action based on the performance of the window as indicated by the sensor. In one non-limiting embodiment of the invention, the sensors are selected from the group of (A) an impact sensor  76  that generates a signal when an object hits or impacts the windshield, e.g. but not limiting to the invention, hits the outer surface  48  of the windshield  20  during take off; (B) a rupture or crack detector, or sensor  78  that generates a signal when a portion of the sheet cracks; (C) an arc sensor  80  which generates a signal indicating that the heatable member is arcing which indicates that the heatable member  32  has or is developing a defect; (D) a sensor or detector  82  to measure the temperature of the conductive coating  62  of the heatable member  32  to prevent over heating of the heatable member  32 , and (E) a moisture sensor  84  to indicate moisture penetration through or around the moisture seal  36  and/or between the sheets of the laminated windshield. 
         [0028]    The term “aircraft intelligent window” as used herein is an aircraft window having one or more sensors or detectors to measure performance of a property or characteristic of the window and forward a signal having the data to a processor. 
         [0029]    The impact sensor  76 , the rupture and crack sensor  78 , the arc sensor  80 , the temperature measuring sensor  82  and the moisture sensor  84  are shown in  FIG. 2  as blocks without showing specific designs, components and/or or operation of the sensors because the invention is not limited to the design or operation of the sensors  76 ,  78 ,  80 ,  82  and  84 , and sensors well known in the art can be used in the practice of the invention, e.g. sensors that can be used in the practice of the invention are disclosed in detail in U.S. Pat. No. 8,155,816 B2, and U.S. Patent Application Publication Nos. 2010/0163675 A1 and 2013/075,531, and no further discussion is deemed necessary. 
         [0030]    Non-limiting embodiments of the invention will be discussed using the right side windshield  10 , the left side windshield  11 , the right front windshield  12 , and the left front windshield  13 , of the aircraft  15 . As can be appreciated, each of the right side windshield  10 , the left side windshield  11 , the right front windshield  12 , and the left front windshield  13 , of the aircraft  15  can have the design of the windshield  20  shown in  FIG. 2  and discussed above, or selected ones of the right side windshield  10 , the left side windshield  11 , the right front windshield  12 , and the left front windshield  13 , of the aircraft  15  can have the design of the windshield  20  and the remaining ones of the right side windshield  10 , the left side windshield  11 , the right front windshield  12 , and the left front windshield  13 , of the aircraft  15  can have different designs, e.g. but not limited any prior art design of an aircraft windshield. 
         [0031]    The discussion is now directed to non-limiting embodiments of aircraft window sensing networks (hereinafter also referred to as “AWSN”) of the invention to receive input from selected ones of the sensors  76 ,  78 ,  80 ,  82  and  84  of the aircraft intelligent windows or windshields  10 - 13 , and compare the present output of the sensors to previous output of the sensors and/or the output from different sensors of different windows measuring the same parameter to estimate life expectance or remaining useable life of the aircraft intelligent window for each of the properties measured by the sensors. In the preferred practice of the invention, the aircraft intelligent windshields  10 - 13  are considered windshields of an aircraft window sensing network (hereinafter also referred to as “AWSN”) discussed in detail below instead of individual independent operating windshields. In this manner, individual performance of the windshields can be considered, and performance of the windshield operating as a windshield of a network can be considered. As will be appreciated, monitoring a network of windows instead of one window may provide information to indicate that the aircraft opening or window mount may be contributing to a window defect, or the design of the window may be useable for one location but not for a different location. By way of illustration and not limiting to the discussion, if past performance and present performance of a window in a network of windows that usually develops defects, e.g. moisture penetration is in “position x” of the aircraft, the type of failure of the windows (moisture penetration) in “position x” may be an indication that a window design is not useable in “position x”. 
         [0032]    In the preferred practice of the non-limiting embodiments of the invention, the sensor  76  provides data relating to impacts to the windshield; the sensor  78  provides data relating to the presence of cracks in the glass and plastic sheets; the sensor  80  provides data relating to arcing of the heatable member  32 ; the sensor  82  provides data relating to the temperature of the heatable member  32 , and the sensor  84  provides data relating to moisture penetration. The sensors used in the practice of the invention include, but are not limited to the sensors and detectors disclosed in U.S. Patent Application Publication Nos. 2010/0163675 A1 and 2013/075531. 
         [0033]    In one non-limiting embodiment of the invention, each of the aircraft intelligent windows monitored have the same sensors, and in another non-limiting embodiment of the invention, the aircraft intelligent windows have sensors that measure a property that is expected to be effected by the continued operation of the aircraft having the aircraft intelligent window. By way of illustration and not limiting to the invention, aircraft intelligent windows at the rear of the aircraft may not have impact sensors because impacts to the windows at the rear of the plane are less likely to have impacts during take off and landings than the front windshields of the aircraft. The sensors mounted on the aircraft intelligent window are collectively referred to as a group of sensors or sensor group. 
         [0034]    Shown in  FIG. 3  is a non-limiting embodiment of an aircraft window sensing network or AWSN  85  of the invention. The AWSN  85  includes, but is not limited to the right side windshield  10  having sensor group  86  connected to a window sensing hub (“WSH”)  88  by way of cable  90 ; the left side windshield  11  having sensor group  92  connected to the WSH  88  by way of cable  94 ; the right front windshield  12  having sensor group  96  connected to the WSH  88  by way of cable  98 ; the left front windshield having sensor group  100  connected to the WSH  88  by way of cable  102 , and AIW  117  having sensor group  116 . The communication between the WSH  88  and the sensor groups  86 ,  92 ,  96  and  100  of the AIWs  10 - 13 , respectively, is provided by cables  90 ,  94 ,  98  and  102 , respectively, and the sensor group  116  of the windshield  117  is connected to the WSH  88  by a transmitter and antenna combination  124  mounted on the windshield  117 , and a transmitter and antenna combination  126  is positioned in the WSH  88 . 
         [0035]    As can now be appreciated by those skilled in the art, passing information between the sensor groups  86 ,  92 ,  96 , 100 , and  116 , and the WSH  88  can be by wireless transmission as shown for windshield  11   7 or can be by wire or cable transmission as shown for the AIWs  10 - 13  as discussed above. Wireless communication and wire communication to pass information between two or more locations or positions is well known in the art and no further discussion is deemed necessary. For additional discussion directed to wireless communication and wire communication to pass information between two or more locations, reference to U.S. Published Patent Publication No 2013/0075531 is recommended. Based on the present discussion, it can now be appreciated that the invention is not limited to the method of passing the information between the sensor groups  86 ,  92 ,  96 ,  100 ,  104 ,  110  and  116 , and the WSH  88 . 
         [0036]    The windshield  117  was added to the AWSN  85  to illustrate a non-limiting embodiment of a wireless connection of the invention. The windshield  117  is not shown in the other non-limiting embodiments of the invention, however, it is understood that wireless connections can be used with other non-limiting embodiments of the invention. Further, unless indicated otherwise, the discussion directed one or more of the IAWs  10 - 13  is applicable to the IAW  117 . 
         [0037]    With continued reference to  FIG. 3 , the WSH  88  includes a microprocessor  130  to process the information received from sensor groups  86 ,  92 ,  96 ,  100  and  116 , to determine the performance of properties of each of the windows of interest. In one non-limiting embodiment of the invention, the WSH  88  includes software and data to format the information from the sensors groups  86 ,  92 ,  96 ,  100  and  116  to present a representation of the performance of the AIWs  10 - 13  and  117 . The invention is not limited to the formatting of the information received by the WSH  88 , e.g. in one non-limiting embodiment of the invention, the data from the sensor groups  86 ,  92 ,  96 ,  100  and  116  received by the WSH  88  is formatted to show performance of the AIWs  10 - 13  and  117  in the categories of windows performing at the bottom quartile, the top quartile and the middle half of the acceptable range for each of the properties of the AIW being monitored. In another non-limiting embodiment of the invention, the formatting includes assigning windows to networks of windows, e.g. a network of side windshields, and a network of front windshields, and noting and comparing their performance. 
         [0038]    As can be appreciated, the invention is not limited to a microprocessor and any equipment for processing information can be used in the practice of the invention, e.g. but not limited to a fully programmable gate array (also known in the an as “FPGA”) and/or an application specific integrated circuit. 
         [0039]    In one non-limiting embodiment of the invention, and as shown in  FIG. 3 , the WSH  88  can be an independent unit used to monitor and control the aircraft window system, or the WSH  88  can be connected to an aircraft central maintenance system  134  (hereinafter also referred to as “aircraft CMS  134 ”) of the aircraft  15  by wire or cable  136 , and/or wireless. The aircraft CMS  134  includes software and historical data to provide expected useable life of the windshields  10 - 13  and  117 , through a mathematical framework and when necessary, set up repair or replacement of the aircraft intelligent window, e.g. but not limited to the procedure disclosed in U.S. Pat. No. 8,155,816. When the windshield sensing hub  88  is used with the aircraft CMS  134 , the formatted information is forwarded from the WHS  88  to the aircraft CMS  134  of the aircraft by the cable  136 . The aircraft CMS  134  acts on the formatted information to determine health and useable life of the AIW  10 - 13  and  117 , e.g. as discussed in detail below. 
         [0040]    As can now be appreciated, the invention is not limited to the number of windows connected to the window sensing hub  88 , and all the windows of the aircraft  15  can be connected to the WSH  88 . Further, the invention is not limited to the number of sensors provided on each of the AIW  10 - 13  and  117  of the aircraft  15 . 
         [0041]    An advantage of the aircraft window sensing network  85  shown in  FIG. 3  is the capability of setting up the microprocessor  130  of the WSH  88  to format only data of interest and forwarding the formatted data of interest to the aircraft central monitoring system  134  to determine the health and useable life of the AIWs of interest, e.g. but not limited to windshields  10 - 13  and  117 . The filtered data is stored for reference, e.g. but not limited to the invention to determine expected life expectance of the AIWs  10 - 13  and  117  as discussed below. By way of illustration and not limiting to the invention, the microprocessor  130  of the WSH  88  is programed based on a mathematical model to format the data of interest from the data collected on the activity of the aircraft. For example and not limiting to the discussion. If the plane is scheduled for take off, before take off, data from all the sensor groups  86 ,  92 ,  96 ,  100  and  116  of the aircraft windshields  10 - 13  and  117  is collected by the aircraft central maintenance system, or aircraft CMS  134  and evaluated by a model based microprocessor  130  to show performance of the aircraft intelligent windshields  12 - 13  and  117 , and the resulting data sent to the aircraft CMS  134  to determine expected useable life of the AIWs  10 - 13  and  117 . If the expected useable life of an AIW  12 - 13  and  117  is less than the flight time to the initial destination or less than a scheduled flight time to an airport having an AIW to replace the AIW of interest, the AIW of interest is replaced before take off. 
         [0042]    In another non-limiting embodiment of the invention, during take off of the aircraft  15 , the microprocessor  130  of the WSH  88  is programed to process data from the impact sensor and the crack sensor of the windshields  10 - 13  and  117 , and to forward the data from the impact sensor and the crack sensor of the windshields to the aircraft CMS  134  to determine any change in the expected useable life of the AIWs  10 - 13  and  117 . 
         [0043]    In still another non-limiting embodiment of the invention, during flight time, the microprocessor  130  is programed to evaluate data from the sensors at a frequency based on its importance during the flight. For example and not limiting to the discussion, the temperature sensor and the arc sensor are checked at the highest frequency; the crack or rupture sensor and the moisture sensor are measured at a frequency less than the frequency check of the arc and temperature sensors, and the impact sensor is measured at a frequency less than the frequency check of the moisture sensor, and the crack sensor of the AIWs  10 - 13  and  117 . 
         [0044]    Further, in another non-limiting embodiment of the invention, during landing of the aircraft, the microprocessor  130  of the WSH  88  is programed to process data from the impact sensor and the crack sensor and to forward the data from the impact sensor and the crack sensor to the ACMS  134  to be part of the window history database and with a mathematical model to determine any change in the expected useable life of the AIWs  10 - 13  and  117 . 
         [0045]    The microprocessor  130  of the WSH  88  can also be programed to display immediately any sensor reading that has a drop in performance of a predetermined percent, e.g. but not limited to 25% or more drop in performance. Data collected and not used during take-off, flight and landing, is forwarded to a storage facility and used to determine life expectance as discussed below. 
         [0046]    Shown in  FIG. 4  is another non-limited embodiment of an aircraft window sensing network of the invention identified by the number  140 . The aircraft window sensing network  140  includes, but is not limited to, the windshields  10 - 13  having sensor groups  86 ,  92 ,  96 , and  100 , respectively, connected to aircraft central monitoring system  142  by the wires  90 ,  94 ,  98 , and  102 , respectively. In this non-limiting embodiment of the invention, the aircraft CMS  142  can include the formatting features of the WHS  88  e.g. but not limited to having the microprocessor  130  positioned in, or being part of, the aircraft CMS  142 . The aircraft CMS  142  of the aircraft window-sensing network  140  shown in  FIG. 4  operates in a similar manner as the WSH  88  and aircraft CMS  134  of the aircraft window sensing network  85  shown in  FIG. 3 . 
         [0047]      FIG. 5  shows still another non-limiting embodiment of an aircraft window-sensing network (“AWSN) of the invention designated by the number  150 . In general, the aircraft window-sensing network  150  includes, but is not limited to, any combination of single or multiple units, including any or all of the IAW  10 - 13 , and  20  (see  FIGS. 1-4 ), the WSH  88  (see  FIG. 3 ), and/or the aircraft CMS  134  ( FIG. 3) and 142  ( FIG. 4 ). In the non-limiting embodiment of the invention shown in  FIG. 5 , the aircraft window sensing network  150  includes, but is not limited to, the sensor group  86  of the right side window  10  and the sensor group  92  of the left side window  11  connected to the WSH  88  by wires  90  and  94 , respectively. The sensor  92  of the left front window  13  is connected to the aircraft CMS  134  by cable  102 , and the aircraft CMS  134  and the WSH  88  are connected by cable  151  to exchange information between the aircraft CMS  134  and the WSH  88  relating to performance of the windows, e.g. but not limited to aircraft history and maintenance of the aircraft intelligent windows  10 ,  11  and  13 . The aircraft CMS  142  is connected by cable  152  to a window sensing HUB  153  to exchange information between the ACMS  142  and the window sensing hub  153  relating to performance of the windows  10 ,  11  and  13 . With continued reference to  FIG. 5 , the sensor  96  of the windshield  12  is connected by wire  98  to sensor  156  of the window  20 , and the sensors  98  and  156  are connected to an aircraft CMS  158  by cable  159 . As can be appreciated, the information from the sensor  96  of the window  12  can be integrated with the information of the sensor  156  of the window  20  and forwarded to the aircraft CMS  142  by the cable  159 , or the information from the sensor  96  of the window  12  can be forwarded by cable  98  to the window  20  and forwarded with the information from the sensor  156  by cable  159  to the aircraft CMS  142 . 
         [0048]    The AWSN  150  of  FIG. 5  provides the option to compare the performance of the AIWs  10  and  11  to one another, and to compare the performance of the AIW  13  to the AIWs  10  and  11  as individual windows or as a group of windows, or to the combination of windows and to compare the performance of the AIW  12  and  20  to one another. Optionally and not limiting to the invention the aircraft CMS  142  can be connected to the aircraft CMS  134  and/or the window sensing hub  153  by wires  160  and  162 , respectively (shown in phantom). In this manner, the performance of the windows can be compared to one another. For example and not limiting to the invention, the output of the arc sensor and temperature sensor for the windows  10 ,  11  and  13  can be compared to one another to see if the deterioration of the AIW follows a pattern or is random. If a failure pattern is followed, the failure of the AIW may be due to an effect acting on the window as contrasted to an effect of the window. 
         [0049]    As can now be appreciated, the invention is not limited to the connections of the intelligent aircraft windows (“IAW”)  10 - 13  as shown in  FIGS. 3-5 , and the invention contemplates any IAW connection configurations, e.g. but not limited to IAW directly or indirectly connected to the WSH or the aircraft CMS; IAW inter-connected to another IAW for information sharing or networking, and any combination of IAWs inter-connected first and then connected as a group to either AWH or integrated aircraft CMS. Further, connections of the intelligent aircraft windows  10 - 13  to the aircraft central maintenance systems  134  and  142  in  FIGS. 3-5 , respectively, and the invention contemplates any individual IAW directly integrated into the aircraft CMS to be part of the aircraft maintenance and aircraft reliability calculation/predictions, any combination of IAWs can be inter-connected and/or grouped together and then connected to the aircraft CMS as part of the aircraft history and maintenance recording system, and the Window Sensing Hub (WSH) integrated into the aircraft CMS as part of the CMS for the aircraft monitoring system. 
         [0050]    As discussed above, any ACMS integration from AIW system to aircraft CMS can be made either by wired connection or wireless connection when acceptable. In the practice of the invention, every AIW can be independently used to shutdown the window heat controller as disclosed in U.S. Published Patent Application Serial No. 2013/075531 or other window related controllers as disclosed in U.S. Patent Application Publication No 2010/0163675 A1. The invention is not limited to reasons to shut down the sensors of the intelligent aircraft windows  10 - 13  and  20  (shown only in  FIG. 5 , and the windows can be shut down for any reason including, but not limited to, a window operating outside of an acceptable range for the property being monitored, or the sensor of the window is not needed because the property being monitored is not active, e.g. a sensor for impact monitoring can be needed on take off but may not necessarily be needed when the aircraft is in flight. 
         [0051]    The non-limited embodiments of the invention provide, among other things, the opportunity to make an intelligent decision for the aircraft control actions, such as shutdown the intelligent aircraft window heat controller, alarm the pilot, data input to the aircraft ACMS based on the window conditions, such as, the window life prediction, window longevity, window arcing condition, window moisture ingression, window impact status, and other window related measurement, will be instituted either by the aircraft ACMS system, by WSH with connection to the aircraft control system input/output modules system, or individually in any AIW with direct or indirect connection to the aircraft control system input/output modules system. 
         [0052]    The discussion is now directed to the use of the networks to monitor the performance of the windows having the sensors. The network shown in  FIG. 3  uses the WSH as a filter to take all of the information and data provided by the sensor groups to study those properties of interest for the activity of the aircraft. By way of illustration and not limiting to the invention, during take off the information from the impact sensors is monitored to identify any impact having force sufficient to cause a sheet of the windshield to fracture. After take off the output of the crack sensor and the impact sensor are saved into the WSH and evaluated by a math model to determine if a reading is outside of normal low impact. With the plane in flight the monitoring of the impact sensor is reduced to read impact data only if a reading is outside of an acceptable range. 
         [0053]    Consider the arcing sensor and the temperature sensor. For planes flying in high temperature zones, the heatable member may have limited use. More particularly, the data from the temperature sensor and the arc sensor can be taken for historical purposes and not processed because the heatable member may be turned off. As can now be appreciated, the output of the arc sensor and the temperature sensor is only used when the data indicates that the heatable member is arcing and/or the temperature sensor indicates a temperature outside an acceptable range. 
         [0054]    As can be appreciated, the invention is not limited to the software program to evaluate the performance of the windshield, and to determine and/or estimate useable life of the windshields, and any of the types known and/or used in the art can be used in the practice of the invention 
       Control System 
       [0055]    With reference to  FIG. 6 , there is shown one non-limiting embodiment of the invention to monitor the performance of the AIW  10 - 13  and  20  shown in  FIG. 5  of the invention and to timely schedule maintenance of, e.g. repairs to, or replacement of, transparencies, e.g. AIWs that are performing outside acceptable limits and/or have a short life expectance. The sensor groups  86 ,  92 ,  96 , and  100 , of the IAWs  10 - 13  of the network  140  shown in  FIG. 4  are connected by wires  90 ,  94 ,  98 , and  102 , respectively to the aircraft CMS  142 , mounted in a console  176  mounted in the airplane  15  ( FIG. 1 ). The aircraft CMS  142  is connected to a monitor  178  to provide visual display, and speaker  180  to provide audible information regarding the performance of the AIWs  10 - 13 . The console  176  can include an alarm  182  to bring attention to the monitor  178 . Placing the console  176  in the aircraft  15  provides the personnel within the aircraft  15  with real time performance of the AIW  10 - 13   
         [0056]    With reference to  FIGS. 6 and 7 , in another non-limiting embodiment of the invention, the console  176  has a wireless transmitter and receiver  184 ; the transmitter  184  transmits signals  186  to a transmitting tower  188 . The signals  186  carry data on the performance of the AIWs  10 - 13 . The tower  188  transmits a signal  190  carrying the data on the performance of the AIW  10 - 13  to a satellite  192 . The satellite  192  transmits a signal  194  carrying the data on the performance of the AIWs  10 - 136  to a control center  196 . The data received is studied and the appropriate action to be taken is scheduled. In one non-limiting embodiment of the invention, based on the information received, personnel at the control center  196  determine what action, if any, is needed. If action such as repairs to the AIW or replacement of the AIW is needed, a signal  198  providing a repair schedule is transmitted to the satellite  192 . The satellite  192  transmits a signal  200  having the repair schedule to the tower  188 . The tower  188  transmits a signal  204  having the repair schedule to the console  176  and to a maintenance center  208  geographically close to the designated repair location (usually the next scheduled stop for the aircraft) to arrange to have all parts, equipment and personal need at the designated repair location. 
         [0057]    In still another non-limiting embodiment of the invention, if the data from the sensor groups indicate that an AIW has to be replaced, the repair schedule can include shipment of an AIW replacement windshield to the next scheduled stop of the aircraft; if the AIW has to be replaced with some urgency, the repair schedule would include a change to the flight plan to land immediately and an AIW scheduled to be delivered to the repair area. The passengers can optionally be transferred to another plane or wait until the repair is completed. If a repair is scheduled, and the repair can be made without removing the unacceptable AIW, the repair schedule can provide for personnel and repair parts to be provided at the designated repair location. 
         [0058]    As can be appreciated, the invention is not limited to wireless transmission of signals carrying information and the transmission can be made by land-lines. Further, the signals can be transmitted between locations solely by satellite, or solely by transmission towers, and by combinations thereof. 
         [0059]    The invention is not limited to the embodiments of the invention presented and discussed above which are presented for illustration purposes only, and the scope of the invention is only limited by the scope of the following claims and any additional claims that are added to applications having direct or indirect linage to this application.