Source: http://www.google.com/patents/US7774112?dq=5,870,513
Timestamp: 2016-08-30 03:30:04
Document Index: 12030324

Matched Legal Cases: ['art 30', 'art 30', 'art 30', 'art 90', 'art 120', 'art 120']

Patent US7774112 - System and method for flight data recording - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA method and system for acquiring aircraft parameters that includes sampling an aircraft parameter during a first sampling period, recording the full value of the aircraft parameter sampled during the first sampling period, then sampling the aircraft parameter during a fixed number of subsequent consecutive...http://www.google.com/patents/US7774112?utm_source=gb-gplus-sharePatent US7774112 - System and method for flight data recordingAdvanced Patent SearchPublication numberUS7774112 B2Publication typeGrantApplication numberUS 10/951,005Publication dateAug 10, 2010Priority dateSep 27, 2004Fee statusPaidAlso published asCA2582191A1, EP1817710A2, EP1817710A4, US7945360, US20060069477, US20100256868, WO2007001370A2, WO2007001370A3Publication number10951005, 951005, US 7774112 B2, US 7774112B2, US-B2-7774112, US7774112 B2, US7774112B2InventorsArmen NahapetianOriginal AssigneeTeledyne Technologies IncorporatedExport CitationBiBTeX, EndNote, RefManPatent Citations (134), Non-Patent Citations (47), Referenced by (5), Classifications (11), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetSystem and method for flight data recording
US 7774112 B2Abstract
a data acquisition unit configured to sample an aircraft parameter during a first sampling period; and sample the aircraft parameter during a plurality of subsequent sampling periods consecutively following the first sampling period; and
wherein the flight data recorder allocates a volume of storage for recording the aircraft parameter over a sampling frame comprising at least one sampling period according to:
wherein “S” is a predetermined number of samples over the sampling frame, “B” is a predetermined number of bits for recording the full actual value of the aircraft parameter, and “b” is the number of bits required to record the change between the aircraft parameter's value in a current sampling period and its value in a previous sampling period, and wherein “b<B”.
a data acquisition unit to sample an aircraft parameter during a first sampling period; and sample the aircraft parameter during a plurality of subsequent sampling periods consecutively following the first sampling period; and
In one embodiment of the present invention, the total number bits to be recorded over a frame is:
Frame Bit Allocation=B+b(S−1) (1)
Where “b” is the number of bits required to record the maximum possible change between a current sampled value and a previously sampled value where “b<B” and “S” is the number of samples per frame.
FIG. 2 is a chart 30 that illustrates a sample application based on actual aircraft parameter recording rates of a B767 aircraft. The chart 30 illustrates the parameters 32 to be recorded, the number of bits or length 34 required to record the maximum actual value of the parameter 32 over the sampling period, and the physical range 36 of the parameter 32. Some of the parameters 32 illustrated in the chart 30 may be slated for increased sampling rates by accident investigators and regulatory agencies. In this particular configuration of the aircraft, the number of samples per unit time “S” is four and the sampling period is one second. Thus, the parameters 32 are sampled over a one second sampling and total of four samples are recorded, for example. The total number of samples per frame “S” will vary according to the particular application. The parameters 32 include, but are not limited to: pitch angle 38, roll angle 40, airspeed 42, elevator 44, aileron 46, control wheel 48, rudder 50, and radio-altitude 52, for example. In the illustrated example, the pitch angle 38 requires the allocation of 9 bits to record the parameter's maximum actual value over the sampling period. The roll angle 40 requires 9 bits, the airspeed 42 requires 10 bits, the elevator 44 requires 10 bits, the aileron 46 requires 10 bits, the control wheel 48 requires 12 bits, the rudder 50 requires 10 bits, and the r-altitude 52 requires 12 bits, for example. The ranges for each of these parameters 32 is as follows: the pitch angle 38 is �180�, the roll angle 40 is �180�, the airspeed 42 is 512 knots, the elevator 44 is �50�, the aileron 46 is �50�, the control wheel 48 is �85�, the rudder 50 is �50�, and the radio-altitude 52 is �8192 ft., for example.
In the example illustrated in the chart 90, the number of bits to be allocated for the for storing the maximum value of each parameter 32 within the first 500 ms sampling period 94 is: nine bits for the pitch angle 38 and the roll angle 40 parameters; ten bits for the airspeed 42, elevator 44, aileron 46, and rudder 50 parameters; and twelve bits for the control wheel 48 and the radio-altitude 52 parameters. Subsequent 500 ms sampling periods 96, 98, 100, 102, 104, 106, 108, however, require the designation of only the number of bits needed to record the maximum possible change in the physical parameter over each 500 ms period relative to the previous sampling period. For each of these parameters 32, the number of bits designated to record the sign and the value of the difference in the measured parameter relative to the previous sampling period is: three bits for the pitch angle 38, roll angle 40, airspeed 42, elevator 44, aileron 46, control wheel 48, and rudder 50 parameters; and eight bits for the radio altitude 52 parameter. During each 500 ms sampling period 96, 98, 100, 102, 104, 106, 108 the maximum change of the parameters 32 is: �0.5� for the pitch angle 38; �1.0� for the roll angle 40; �1.5 knots for the airspeed 42; �0.1� for the elevator 44; �0.1� for the aileron 46; �3� for the control wheel 48; �0.1� for the rudder 50; and �15.8 ft. for the radio altitude 52. Accordingly, after the actual value is initially recorded in the first 500 ms sampling period 94, the FDR only needs to allocate the number of bits necessary to record the difference in the maximum change in any of the parameters 32 over the remaining 500 ms sampling periods 96, 98, 100, 102, 104, 106, 108.
FIG. 5 is a chart 120 that illustrates the total number of bits to be allocated over the sampling frame 112. At double the sampling rate of two samples per second (i.e., one sample every 500 ms) the number of bits required to store all eight parameters 32 over the four second frame 112 is 285 bits, for example. At a 500 ms sampling period and a four second frame “S”, the number of samples taken by the acquisition system is eight samples per frame 112. In the first 500 ms sampling period 94 of the frame 112, the number of bits to be allocated is the number of bits required to store the parameter's 32 full value. In the subsequent seven sampling periods 96, 98, 100, 102, 104, 106, 108 only the number of bits required to record the sign and the value difference of the parameter 32 that is supported within the 500 ms sampling period relative to the previous sampling period is recorded. In the first 500 ms second sampling period 94, the number of bits 124 to be allocated is 82 and that corresponds to the bits required to represent the parameter's 32 full value. The number of bits to be allocated to record each parameter's 32 full value during the first 500 ms sampling period 94 is: nine bits for the pitch angle 38 and the roll angle 40 parameters; ten bits for the airspeed 42, elevator 44, aileron 46, and rudder 50 parameters; and twelve bits for the control wheel 48 and the radio altitude 52 parameters, for a total of 82 bits as shown in cell 124. In the subsequent 500 ms sampling periods 96, 98, 100, 102, 104, 106, 108 the number of bits to be allocated for each parameter 32 to record the sign and the value of the difference in the measured parameter relative to the previous sampling period is: three bits for the pitch angle 38, roll angle 40, airspeed 42, elevator 44, aileron 46, control wheel 48, and rudder 50 parameters; and eight bits for the radio altitude 52 parameter, for a total of 29 bits as shown in each cell 126. Thus, the total number of bits to be allocated for the entire four second frame 112, as shown in cell 128, is:
Total Bits per Frame=82+29(7)=285 bits. (2)
As discussed previously, equation (1) also may be used to arrive at the total number of designated bits for each parameter for the entire four second frame 112:
B+b(S−1) (1)
Where “S” is the predetermined number of samples per frame, “B” is the predetermined number of bits for recording the full actual value of the parameter, and “b” is the number of bits required to record the difference between a current value and a previous value, and where “b<B”. In the example illustrated in FIG. 5, chart 120, for the pitch angle 38 parameter:
B=9;
b=3; and
S=8.
Applying these values into equation (1) over the four second sampling frame 112 at a sampling period of 500 ms yields:
9+3(8−1)=30 bits.
This is less than the conventional number of bits “SB” required to store the same parameter over the same four second sampling frame:
SB=4*9=36 bits.
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(9 pages).43 *System design for automated airborne data acquisition; Blyler, J.E.; Prabhakar, J.C.; Circuits and Systems, 1991., Proceedings of the 34th Midwest Symposium on; May 14-17, 1991 pp. 966-969 vol. 2; Digital Object Identifier 10.1109/MWSCAS.1991.251975.44Unknown, Air Accidents Investigation Branch: Jan. 2006 G-BVET, unknown date, from http://www.aaib.gov.uk/publicatins/formal-reports/.45Unknown, Air Accidents Investigation Branch: Jan. 2006 G-BVET, unknown date, from http://www.aaib.gov.uk/publicatins/formal—reports/.46Unknown, Order 7610.4K Special Military Operations, US Department of Transportation, FAA Feb. 19, 2004.47Written Opinion, Application No. PCT/US05/33034.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7945360 *Jun 21, 2010May 17, 2011Teledyne Technologies IncorporatedCost reduction system and method for flight data recordingUS20080039997 *Mar 5, 2007Feb 14, 2008Aeromechanical Services Ltd.Aircraft flight data management systemUS20100256868 *Jun 21, 2010Oct 7, 2010Armen NahapetianCost reduction system and method for flight data recordingUS20120191273 *Aug 11, 2010Jul 26, 2012Aeromechanical Services Ltd.aircraft flight data delivery and management system with emergency modeUS20130346632 *Jun 19, 2013Dec 26, 2013SnecmaMethod of synchronizing data for algorithms of asynchronous computers of an aircraft* Cited by examinerClassifications U.S. Classification701/33.4, 360/5, 340/436, 701/14, 370/442, 701/3International ClassificationG01M17/00Cooperative ClassificationG07C5/0808, G07C5/085European ClassificationG07C5/08D, G07C5/08R2Legal EventsDateCodeEventDescriptionSep 27, 2004ASAssignmentOwner name: TELEDYNE TECHNOLOGIES INCORPORATED, CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NAHAPETIAN, ARMEN;REEL/FRAME:015839/0204Effective date: 20040924Jun 21, 2010ASAssignmentOwner name: TELEDYNE TECHNOLOGIES INCORPORATED,CALIFORNIAFree format text: CHANGE OF ADDRESS;ASSIGNOR:TELEDYNE TECHNOLOGIES INCORPORATED;REEL/FRAME:024569/0988Effective date: 20070205Owner name: TELEDYNE TECHNOLOGIES INCORPORATED, CALIFORNIAFree format text: CHANGE OF ADDRESS;ASSIGNOR:TELEDYNE TECHNOLOGIES INCORPORATED;REEL/FRAME:024569/0988Effective date: 20070205Feb 10, 2014FPAYFee paymentYear of fee payment: 4Jan 21, 2016ASAssignmentOwner name: TELEDYNE CONTROLS, LLC, CALIFORNIAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TELEDYNE TECHNOLOGIES INCORPORATED;REEL/FRAME:037554/0580Effective date: 20160101RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services