Detected information display system in fire detecting system

A detected information display system in a fire detecting system of the present invention which is equipped with detectors arranged in a warning area and a control panel and achieves a specified information display on a physical quantity detected by the detectors, includes a secondary conversion part to convert the physical quantity detected by the detector to the specified level, a conversion level storage part to store the converted level, an extraction part to extract the maximum level from the levels stored in the conversion level storage part, and a display part which is equipped with level display parts, and keeps the level display part corresponding to the converted level and the level display part corresponding to the maximum extracted level in a visually different condition from each other. The maximum detected physical quantity and the set value to indicate the abnormal level can be rapidly grasped, and the displays of a plurality of detectors can be displayed in an integrated and related manner.

BACKGROUND OF THE INVENTION
 1. Field of the Invention
 The present invention relates to a detected information display system in a
 fire detecting system for displaying a specified information on the
 physical quantity detected by a sensor in the fire detecting system
 provided with the sensor and a control panel to control the sensor.
 2. Description of the Related Art
 A smoke detection system using a sampling tube is proposed to detect a fire
 in a high ventilation space such as a clean room and a radio room. In this
 system, the long sampling tube with a plurality of suction holes formed
 therein is installed in a warning area to be monitored, the air in the
 warning area is sucked through this sampling tube, and the smoke
 concentration of the sucked air and the air-flow speed are detected by a
 smoke detector and an air-flow detector provided in the vicinity of a base
 end part of the sampling tube. Generally, a plurality of sampling tubes
 are provided, and a plurality of smoke detectors and a plurality of
 air-flow detectors are respectively provided corresponding thereto. These
 smoke detectors and air-flow detectors are controlled by a control panel.
 This control panel has been conventionally equipped with a display part to
 display the detected results or the like of the smoke detectors and
 air-flow detectors. FIG. 9 is a front view of the control panel in a
 conventional fire alarm system, and FIG. 10 is an expanded front view of
 the display part of the control panel of FIG. 9. As illustrated in FIG. 9,
 a plurality of (six in FIG. 9) display parts 101 corresponding to the
 number of the detectors are provided on a conventional control panel 100
 independently from each other. Each display part 101 is equipped with ten
 LEDs 110-119 to display the smoke concentration detected by the smoke
 detectors as either level of 1 to 10, three LEDs 120 to 122 to display
 that the level of the smoke concentration exceeds the specified level, and
 one LED 123 to display an abnormality in the air-flow speed.
 In such a conventional display part, when the smoke concentration detected
 by the smoke detectors is converted to either level corresponding to the
 detected smoke concentration out of the specified ten levels by the
 conversion part not indicated in the figure (this level is referred to as
 the "concentration level" as necessary), the LED corresponding to the
 converted concentration level out of the LEDs 110 to 119, and all LEDs
 corresponding to the concentration level lower than the converted
 concentration level (all LEDs located lower than the LED corresponding to
 the converted concentration level) are lit. For example, if the converted
 concentration level is 5, the LEDs 110 to 114 are lit. The conversion of
 the concentration level and the lighting of the LEDs are instantaneously
 updated every time the output is received from the smoke detectors, and
 constantly real-time processed. Three concentration levels are inputted in
 advance as the thresholds to judge three conditions of "CAUTION",
 "WARNING" and "ABNORMAL" (these three conditions are referred to as the
 "alarm conditions" as necessary) to the concentration level through an
 input part not indicated in the figure, and every time the concentration
 level is converted, a judgment part judges whether or not the
 concentration level exceeds the threshold. For example, when the
 concentration levels 5, 8 and 10 are set as the thresholds (each
 corresponding to the levels of "CAUTION", "WARNING" and "ABNORMAL"), the
 condition is judged to be "CAUTION" if the converted concentration level
 is 6.
 When the concentration level is thus judged to fall into an alarm
 condition, the LED corresponding to the applicable condition out of three
 LEDs 120 to 122 is lit. For example, in the condition of "CAUTION", the
 LED 120 is lit. In the condition of "WARNING", the LED 121 is lit, and in
 the condition of "ABNORMAL", the LED 122 is lit. Though the lighting
 condition of these LEDs 120 to 122 is kept until a reset switch is
 depressed, the lighting of the LEDs 110 to 119 is constantly real-time
 updated, and for example, if the concentration level is temporarily 6 and
 then, changed to 3, the LED 120 is continuously lit, while only the LED
 112 and the LEDs 110 to 111 located therebelow are lit as for the
 concentration level.
 When the threshold is confirmed, a confirmation button 124 is depressed,
 and only while the confirmation button 124 is depressed, only the LED
 corresponding to the concentration level set as the threshold out of the
 LEDs 110 to 119 is lit. For example, if the concentration levels 5, 8 and
 10 are set as the thresholds, only the LEDs 114, 117 and 119 are lit. It
 can be confirmed by this lighting that the concentration levels 5, 8 and
 10 are respectively "CAUTION", "WARNING" and "ABNORMAL". While confirming
 the setting, the concentration level under detection now is not displayed.
 The air-flow speed detected by the air-flow detectors is constantly
 compared with the air-flow speed range preset as the threshold (i.e., the
 speed range deemed normal), and when the detected air-flow speed exceeds
 the air-flow speed range, the LED 123 is lit to display the abnormal
 air-flow speed.
 There were, however, various problems in the conventional detected
 information display system in such a fire detecting system.
 Firstly, the concentration level has been simply displayed in a constantly
 real-time manner as described above, and when the concentration level
 temporarily leads to the threshold, and then, dropped to the concentration
 level lower than the threshold, only the concentration level after the
 drop is displayed by the LEDs 110 to 119 though the LEDs 120 to 122 to
 indicate the alarm condition are lit, and the concentration level when an
 abnormal condition is generated, could not be grasped. Similarly, the
 maximum level out of the detected concentration levels in monitoring a
 fire could not be grasped, and when the concentration level 7 is detected
 under the condition where the threshold of the "CAUTION" condition is the
 concentration level 5, and the threshold of the "WARNING" condition is the
 concentration level 8, only the "CAUTION" condition has been displayed
 though there is a tendency leading to not only the "CAUTION" condition but
 also to the "WARNING" condition. Thus, it has been difficult to predict
 the tendency of the smoke concentration in advance and to take an action
 in an early stage by the monitoring service man.
 Further, in the conventional detected information display system, it was
 necessary to depress the confirmation button 124 in confirming the
 threshold as described above, and it took time to confirm the threshold.
 In addition, the present concentration level is not displayed while the
 threshold is displayed, and there was a problem that the concentration
 level can not be temporarily grasped.
 Still further, in the conventional detected information display system, the
 display of a plurality of detectors are made on another display part 101
 as illustrated in FIG. 9, the condition of all detectors could not be
 grasped unless the eyes are extensively moved, resulting in an
 inconvenience that the situation can not be grasped rapidly. Also, each
 detector has been displayed irrespective thereof, and for example, even if
 the LED 121 to indicate the "WARNING" condition of one display part 101
 and the LED 121 to indicate the "WARNING" condition of another display
 part 101 are lit, the context of these displays could not be grasped, and
 thus, the fire spreading direction or the like could not be grasped.
 Further, because the display is made by separate display part 101, the
 operation of confirming the threshold must be achieved for each display
 part 101 a plurality of times, and the operability was insufficient also
 in this point.
 In addition, in the conventional detected information display system, only
 the concentration level was real-time displayed, and only the fact that
 the air-flow speed exceeds the specified threshold was displayed on the
 LED 123. Thus, the air-flow speed could not be real-time grasped, and even
 when a factor of troubles such as clogging of the sampling tube is
 generated, and the change of the air-flow speed which is a sign leading to
 a trouble is generated, there were no devices to know such a condition,
 and it was impossible to predict generation of such a trouble in advance
 by the monitoring service man, and to take an action in an early stage.
 SUMMARY OF THE INVENTION
 An object of the present invention, in order to solve the problems in the
 conventional detected information display system in such a fire detecting
 system, is to provide the detected information display system in the fire
 detecting system capable of rapidly grasping the maximum level of the
 detected physical quantity and the set values, and capable of achieving
 the display of a plurality of detectors in an integrated and related
 manner.
 The present invention to solve the problems of a conventional detected
 information display system in a fire detecting system, is characterized in
 that a detected information display system in a fire detecting system
 which is equipped with a detector arranged in a warning area and a control
 panel to control the detector, and achieves a specified display on a
 physical quantity detected by the detector comprising, a conversion part
 to convert the physical quantity detected by the detector to a specified
 level in accordance with a prescribed standard, a conversion level storage
 part to store the level converted by the conversion part, an extraction
 part to extract the maximum level from the level stored in the conversion
 level storage part, and a display part which is equipped with level
 display parts corresponding to the specified level and displays the level
 converted by the conversion part and the maximum level extracted by the
 extraction part by keeping at least the level display part corresponding
 to the level converted by the conversion part and the level display part
 corresponding to the maximum level extracted by the extraction part in a
 visually different condition from each other.
 In the present invention, the causes for generating an abnormal condition
 can be rapidly and easily elucidated because the maximum level is
 displayed on the display part in addition to the present detection level,
 and these levels can be easily grasped.
 For example, when a high detection level is present before even if the
 present detection level is low, it can be imagined that some causes for an
 abnormality were temporarily generated in the past, and the warning area
 can be examined.
 The present invention is characterized in that a detected information
 display system in a fire detecting system which is equipped with a
 detector arranged in a warning area and a control panel to control the
 detector, and achieves a specified display on a physical quantity detected
 by the detector comprising a conversion part to convert the physical
 quantity detected by the detector to a specified level in accordance with
 a prescribed standard, a threshold storage part to store an arbitrarily
 set threshold level of the specified levels as the threshold to judge
 whether or not the warning area is in a specified condition, and a display
 part which is equipped with level display parts corresponding to the
 specified level and displays the level converted by the conversion part
 and the threshold level stored in the threshold storage part by keeping at
 least the level display part corresponding to the level converted by the
 conversion part and the level display part corresponding to the threshold
 level stored by the threshold storage part in a visually different
 condition from each other.
 In the present invention, the level set as the threshold is displayed on
 the display part in addition to the present detection level, this level
 can be easily grasped, and the setting of the threshold level can be
 rapidly and easily confirmed or changed.
 In the present invention, a judgment part to judge whether or not the
 warning area is in a specified condition by comparing the level converted
 by the conversion part with the threshold level stored in the threshold
 storage part can be provided, and a judgment result display part to
 display the result of judgment by the judgment part can be provided on the
 display part.
 In the present invention, the result of comparison with the threshold level
 can be displayed as the result of judgment, the result of judgment can be
 easily grasped, and troubles can be rapidly and easily restored.
 The present invention is characterized in that a plurality of the detectors
 are provided, and a plurality sets of the level display parts
 corresponding to a plurality of the detectors are provided on the display
 part.
 Alternatively, a plurality of the detectors may be provided, and a
 plurality sets of the judgment result display parts corresponding to a
 plurality of the detectors may be provided on the display part.
 The present invention enables to collectively grasp the display of each
 detector in the same field of vision, and to easily grasp the whole
 detected information. For example, the maximum level of a plurality of
 detectors, the present concentration level, or the like can be easily
 compared and examined, and more detailed condition to elucidate the causes
 for abnormalities can be easily obtained.
 The present invention is characterized in that a service condition storage
 part to store the level display part and the judgment result display part
 to be used in the display out of the level display parts and the judgment
 result display parts is provided, and that the display part determines the
 level display part and the judgment result display part to be used in the
 display so that the level display part and the judgment result display
 part are arranged in the specified direction along the time series based
 on the level display part and the judgment result display part stored in
 the service condition storage part.
 In the present invention, the order of generation of the causes can be
 easily grasped and troubles can be rapidly and easily restored based on
 the display order. For example, the fire spreading direction or the like
 can be estimated based on the order of generation.
 In the present invention, the temperature, the humidity, the quantity of
 light, or the like can be arbitrarily determined as necessary for the
 physical quantity to be detected by the detectors.
 For example, the detectors may be smoke detectors to detect the smoke
 concentration, and the physical quantity may be the smoke concentration.
 Alternatively, the detectors may be air-flow detectors to detect the
 air-flow speed, and the physical quantity may be the air-flow speed.
 Further, the respective detection results of the smoke detectors and the
 air-flow detectors can be displayed by one display system, not limited to
 one physical quantity.

DESCRIPTION OF THE PREFERRED EMBODIMENT
 An embodiment of the present invention will now be described with reference
 to the drawings.
 A fire detecting system of the present embodiment of FIG. 1 is constituted
 as a smoke detecting system using a sampling tube. The smoke detecting
 system comprises a long sampling tube 1 which is equipped in a warning
 area A to be monitored and provided with a plurality of suction holes 1a,
 a suction device 2 to suck the air in the warning area A through the
 sampling tube 1, a smoke detector 3 and an air-flow detector 4
 (hereinafter, referred to as "detector" as necessary) provided in the
 vicinity of a base end part of the sampling tube 1, and a control panel 5
 to control these detectors. The smoke detector 3 irradiates the laser beam
 on the air sucked through the sampling tube 1, and receives the scattered
 laser beam, and provides the analog output of the quantity of the received
 beam. The air-flow detector 4 provides the analog output of the speed of
 the air sucked through the sampling tube 1. However, the constitution and
 the output mode of the detectors can be arbitrarily changed.
 A plurality of sampling tube 1 are provided though they are omitted in FIG.
 1, and a plurality of smoke detectors 3 and air-flow detectors 4 are
 arranged corresponding thereto. A plurality of smoke detectors 3a-3j and
 air-flow detectors 4a-4j are intensively controlled by a control panel 5.
 The control panel 5 comprises a storage part 10, a display part 20, a
 display control part 30, an input part 40, an output part 50, an A/D
 converter 60, a switching part 70 and a control part 80 as illustrated in
 FIG. 3.
 In the present embodiment, the analog outputs from the smoke detectors
 3a-3j are converted in either numerical value (hereinafter, referred to as
 "the detection quantity") of 0 to 100, and further converted into either
 concentration level of 0 to 10. The smoke concentration includes three
 alarm conditions of "CAUTION", "WARNING", and "ABNORMAL", and three
 concentration levels are set as the threshold to judge the condition. In
 addition, the analog output from the air-flow detectors 4a-4j are
 converted into either numerical value (hereinafter, referred to as
 "detection quantity" as described above) of 0 to 100. The air-flow speed
 includes two alarm conditions of "low air-flow" and "high air-flow"
 relative to the normal speed, and two detection quantities are set as the
 threshold to judge the condition.
 Out of the above-described components, the storage part 10 stores various
 kinds of information, and is provided with a detection quantity storage
 part 11 to store the detection quantity which is detected by a detector
 and converted by a below-described primary conversion part 81, a
 conversion level storage part 12 to store the level converted by a
 below-described secondary conversion part 82, a threshold storage part 13
 to store the threshold inputted through an input device, and a service
 condition storage part 14 to store the information on the service
 condition of a plurality of level display parts 22 and a plurality of
 judgment result display part 23 which are described below. In addition,
 programs and data necessary for monitoring a fire are stored in the
 storage part 10. The detection quantity storage part 11 through the
 service condition storage part 14 of the storage part 10 are constituted
 in an integrated manner or in a separate manner with/from each other, and
 more specifically, in a ROM, a RAM and other arbitrary external storage
 devices, and the information unnecessary to write is stored in the ROM,
 and the other information is stored in the RAM or external storage
 devices.
 The display part 20 is provided with a detection quantity display part 21
 to display the detection quantity converted by the primary conversion part
 81, a level display part 22 to display the level converted by the
 secondary conversion part 82, a judgment result display part 23 to display
 the judgment result of a below-described judgment part 84, and a line
 number display part 24 to display the line number of the detector. In
 addition, arbitrary format items or the like are displayed on the display
 part 20. This display part 20 is specifically constituted as one liquid
 crystal panel arranged in the front of a box body of the control panel 5
 as illustrated in FIGS. 1 and 2, and the detection quantity display part
 21 through the line number display part 24 are displayed at the specified
 position (different position for each screen) of the liquid crystal panel
 as necessary. Further, a display control part 30 controls the display part
 20, and more specifically, is an LCD controller.
 Also, the input part 40 is an input contact to receive the input signal
 from an input device to input or change the above-described threshold or
 an arbitrary device such as various switches (hereinafter, referred to as
 an "input device"). The output part 50 is an output contact to transmit
 the output signal to a printer, a speaker or an arbitrary device such as a
 suction device 2 or the like (hereinafter, referred to as an "output
 device").
 The A/D converter 60 converts the analog signal outputted from the detector
 into the digital signal, and outputs it to the control part 80. The
 switching part 70 achieves the switching operation that only the analog
 signal from an arbitrary part of a plurality of detectors can be inputted
 in the A/D converter 60, and comprises, for example, a multiplexer.
 The control part 80 controls the storage part 10, the display part 20, the
 display control part 30, the input part 40, the output part 50, the A/D
 converter 60, and the switching part 70. The control part 80 is provided
 with the primary conversion part 81 to convert the smoke concentration
 detected by the smoke detectors 3a to 3j and the air-flow speed detected
 by the air-flow detectors 4a to 4j into either numerical value of 0 to 100
 in accordance with the prescribed standard, the secondary conversion part
 82 to convert the detection quantity on the smoke concentration converted
 by the primary conversion part 81 into either concentration level of 1 to
 10 in accordance with the prescribed standard, an extraction part 83 to
 extract the maximum concentration level as necessary from the
 concentration level stored in the conversion level storage part 12, and
 the judgment part 84 to judge whether or not a warning area A is in which
 alarm condition, i.e., in either alarm condition of caution, warning or
 abnormal by comparing the concentration level converted by the secondary
 conversion part 82 with the concentration level stored in the threshold
 storage part 13. The primary conversion part 81 to the judgment part 84 of
 the control part 80 comprise, and more specifically, electric circuits
 including ICs and programs in an integrated/separate manner with/from each
 other. The standard similar to the conventional one can be used as the
 prescribed standard in the primary conversion and the secondary
 conversion.
 The display operation of the detected information in such a fire detecting
 system is described below.
 Firstly, a power supply of the control panel 5 is closed, and when an
 initialization switch is operated, the detection quantity storage part 11,
 the conversion level storage part 12, the threshold storage part 13, and
 the service condition storage part 14 are initialized. When a monitoring
 service man inputs three concentration levels (each corresponding to
 "CAUTION", "WARNING" and "ABNORMAL") for the threshold of the smoke
 concentration, and two detection quantities (each corresponding to the
 "normal upper limit value", and the "normal lower limit value") as the
 threshold of the air-flow speed, these inputted concentration levels and
 detection quantities are stored in the threshold storage part 13. These
 concentration levels and detection quantities are determined for each
 detector according to the environment in which the detector is installed,
 arbitrarily in such a manner, for example, the concentration levels of the
 smoke detector 3a are 5, 8 and 10, the concentration levels of the smoke
 detector 3b are 4, 7 and 10, the detection quantities of the air-flow
 detector 4a are 20 and 80, and the detection quantities of the air-flow
 detector 4b are 15 and 75.
 When the monitoring service man pushes a monitoring start button not
 indicated in the figure, the control signal to instruct the suction start
 is outputted to the suction device 2 through the output part 50 to start
 the fire monitoring. After the monitoring is started, only the letters
 "Monitoring Fire" are displayed on the display part 20 without lighting of
 a back light until the output signal from the judgment part 84 is
 outputted as described below. (The display is omitted in the figure.)
 The polling signal is outputted from the control part 80 to the detector at
 the prescribed polling timing, the polling signal is successively called,
 and the analog signal to be outputted from each detector is successively
 received through the switching part 70, and successively converted into
 the digital signal through the A/D converter 60. The converted digital
 signal is converted into either detection quantity of 0 to 100 by the
 primary conversion part 81, and successively stored in the detection
 quantity storage part 11 in a classified manner for each detector. The
 detection quantities outputted from the smoke detectors 3a to 3j and
 converted into the primary conversion part 81 are further converted into
 either concentration level of 0 to 10 by the secondary conversion part 82,
 and successively stored in the conversion level storage part 12 for each
 detector. Conversion by the primary conversion part 81 and the secondary
 conversion part 82 is achieved by referring to a conversion table not
 indicated in the figure, but omitted here because its detail is well
 known. The address number of each detector is added to the signal to be
 outputted from the detector, and the detector is identified using the
 address number. The address number need not be always added to each
 detector.
 Judgment is made by the judgment part 84 of the control part 80 every time
 such a primary conversion and a secondary conversion are achieved. That
 is, in the judgment part 84, the concentration level converted by the
 secondary conversion part 82 is compared with the concentration level
 stored as the threshold in the threshold storage part 13, and when the
 converted concentration level is not less than the stored concentration
 level, the signal indicating either of "CAUTION", "WARNING" or "ABNORMAL"
 is outputted. On the other hand, when the converted concentration level is
 lower than the stored minimum concentration level (the "CAUTION" level
 here), no signal is outputted. Further, in the judgment part 84, the
 detection quantity of the air-flow speed converted by the primary
 conversion part 81 or the secondary conversion part 82 is compared with
 the detection quantity stored as the threshold in the threshold storage
 part 13, and the signal indicating either "low air-flow" when the
 converted detection quantity is smaller than the stored minimum detection
 quantity which is deemed normal, or "high air-flow" when the converted
 detection quantity is larger than the maximum detection quantity which is
 deemed normal. On the other hand, if the converted detection quantity is
 smaller than the stored detection quantity, no signal is outputted.
 In the control part 80, the output signal from the judgment part 84 is
 constantly monitored, and when the signal indicating "CAUTION", "WARNING"
 or "ABNORMAL" is outputted, the display part 20 is controlled to display
 the screen indicated in FIG. 4. When the signal indicating "low air-flow"
 or "high air-flow" is outputted, the screen indicated in FIG. 7 is
 displayed. (The display in FIG. 4 or subsequent figures is attended with
 the lighting of the back light.)
 The display indicated in FIG. 4 is described first. In FIG. 4, the letters
 "alarm" are displayed in the top center to indicate that the screen gives
 the alarm. The letters "Level 12345678910" are displayed therebelow in the
 right-to-left direction in the figure. The judgment result display part
 23, the line number display part 24, and the level display part 22 are
 provided therebelow in the right-to-left direction in the figure.
 Here, the level display part 22 comprises a plurality of squares, and ten
 squares are continuously arranged in the right-to-left direction in the
 figure corresponding to the concentration levels 1 to 10 to be converted
 by the secondary conversion part 82. For example, the leftmost level
 display part 22 corresponds to the concentration level 1, the next level
 display part 22 corresponds to the concentration level 2, and the
 rightmost level display part 22 corresponds to the concentration level 10.
 (A plurality of level display parts 22 and the letters "123 . . . 10" are
 arranged in the upper and lower positions corresponding to each other.)
 Out of these level display parts 22, the level display part 22
 corresponding to the concentration level not more than the concentration
 level converted by the secondary conversion part 82 is indicated in black,
 and the level display parts 22 corresponding to the other concentration
 level are indicated in white. FIG. 4 indicates that the concentration
 level converted by the secondary conversion part 82 is 6. The level
 display part 22 may, of course, be indicated in other color. The shape of
 the level display part 22 is not limited to square, and may be triangular
 or polygonal. In addition, the level display part 22 may be indicated by a
 simple bar graph though it is indicated as a set of a plurality of square
 blocks.
 In the screen indication in FIG. 4, the maximum concentration level out of
 the concentration levels stored in the conversion level storage part 12 is
 extracted by the extraction part 83 of the control part 80, and only the
 level display part 22 corresponding to the maximum extracted concentration
 level is bordered in white. FIG. 4 indicates that the maximum extracted
 concentration level is 6. Any display other than the above-described
 bordering may be accepted so long as the maximum concentration level can
 be easily understood.
 In the screen indication of FIG. 4, the concentration level stored as the
 threshold in the threshold storage part 13 is read, and the numerals of
 [1], [2], [3] are displayed on the level display part 22 corresponding to
 the concentration level in the order from the smallest number upward of
 the concentration level. That is, 1 means "CAUTION", 2 means "WARNING", or
 3 means "ABNORMAL". FIG. 4 indicates the concentration levels ("CAUTION",
 "WARNING" and "ABNORMAL") stored as the threshold are 4, 7 and 10,
 respectively.
 The above-described numerals of [1], [2] and [3] are the same as those used
 in the display of representative indicating lamps 91-93 indicated in FIG.
 2. These representative indicating lamps 91-93 are three indicating lamps
 provided on the front of a box body of the control panel 5, and the
 numerals of [1], [2] and [3] are affixed to each of the representative
 indicating lamps 91-93. Also, the letters of "CAUTION", the letters of
 "WARNING" and the letters of "ABNORMAL" are affixed in the vicinity of the
 representative indicating lamp 91 for "1", the representative indicating
 lamps 92 for "2", and the representative indicating lamp 93 for "3",
 respectively. The representative indicating lamp 91, the representative
 indicating lamp 92, or the representative indicating lamp 93 is lit by the
 signal to be outputted through the output part 50 when the concentration
 level corresponds to "CAUTION", "WARNING" or "ABNORMAL", respectively, by
 the judgment of the judgment part 84, and the alarm condition is notified
 to the monitoring service man. The visibility of the monitoring service
 man can be improved to enable rapider judgment by agreeing the display of
 the judgment result display part 23 with the display of the representative
 indicating lamps 91-93.
 The line numbers of the smoke detectors 3a to 3j to have outputted the
 analog signal attributable to generation of the alarm are displayed on the
 line number display part 24. These line numbers are specified by referring
 to the table indicating the reference of the address number to the line
 number based on the address numbers of the smoke detectors 3a to 3j
 affixed to the analog signal. FIG. 4 indicates that the line number is 10.
 Further, either letters of "CAUTION", "WARNING" or "ABNORMAL" are displayed
 on the judgment result display part 23 according to the judgment result of
 the judgment part 84. FIG. 4 indicates that the judgment result is
 "CAUTION".
 Because the alarm screen itself of FIG. 4 is displayed until switched to
 other screens by manual operation, the monitoring service man can easily
 confirm its detail. The display content by the level display part 22 and
 the judgment result display part 23 is updated for each polling, and
 instantaneously changed according to the constantly changing content. For
 example, when the concentration level which is inputted and converted in
 the next polling from the smoke detector of the line number of 10 is 3,
 only the level display part 22 corresponding to the concentration levels 1
 to 3 as illustrated in FIG. 5 is displayed in black, and the level display
 parts 22 corresponding to the other concentration level are indicated in
 white. Because the maximum concentration level to be extracted by the
 extraction part 83 is still 6, only the level display part 22
 corresponding to the concentration level 6 is bordered in white. And
 because the judgment result of the judgment part 84 is still "CAUTION",
 the letters of "CAUTION" are displayed in the judgment result display part
 23. However, when these maximum concentration levels and judgment results
 are changed, these display contents are also changed. Thus, the monitoring
 service man can constantly grasp the latest information, and make rapider
 judgment.
 The display part 20 is constituted to simultaneously display a plurality of
 display units U, where one display unit U comprises the level display part
 22, the line number display part 24 and the judgment result display part
 23 as illustrated in FIG. 5. (In the present embodiment, ten sets of
 display units U1 to U10 can be simultaneously displayed.) When it is
 necessary to display other display units U according to the output from
 the judgment part 84 in a condition where one or more display units U are
 displayed on the display part 20, these display units U are arranged in
 the specified direction (the direction from the upper side to the lower
 side of the display part 20 in the present embodiment) along the time
 series so as to correspond to the order of receiving the output from the
 judgment part 84. FIG. 6 shows the condition where another display unit U2
 is displayed in addition to the display unit U1 of FIG. 5.
 Due to such a display control, the number of the display unit U used in the
 present display is stored and updated in the service condition storage
 part 14 of the storage part 10 every time the display of the display part
 20 is updated. More specifically, flags No. 1 to No. 10 indicating the
 service condition of the display part 20 are prepared in the service
 condition storage part 14, each flag is allotted to the display unit U
 located on the upper side of the display part 20 in the order from the
 smallest number upward to indicate the display or non-display condition of
 the display unit U. For example, the condition where the first flag is
 set, indicates that the highest display unit U1 of the display part 20 is
 in the display condition, while the condition where the tenth flag is set
 indicates that the lowest display unit U10 of the display part 20 is in
 the display condition.
 Every time a new display unit is displayed, the control part 80 refers to
 the storage content of the service condition storage part 14, the flag of
 the smallest number out of the non-set flags is set, and the display is
 achieved using the display unit U corresponding to the flag of the
 smallest number. For example, when the screen of FIG. 5 is displayed, only
 the first flag is set, the next flag is set when the display unit U is
 further added, and the display in FIG. 6 is achieved using the second
 display unit U2 from the top corresponding to the second flag. By
 arranging the display units U1 to U10 along the time series, the
 monitoring service man can understand the order of receiving the alarm
 output from the detector, and easily estimate the spreading direction of a
 fire, the cause of a fire, etc.
 Then, the screen shown in FIG. 7 which is displayed when the signal
 indicating "low air-flow" or "high air-flow" from the judgment part 84 is
 described. In FIG. 7, the letters of "failure" are displayed in the top
 center in the display part 20 to indicate that this screen is a screen to
 notify the failure, and the judgment result display part 23 and the line
 number display part 24 are provided therebelow in the right-to-left
 direction. If the judgment result display part 23 and the line number
 display part 24 are deemed as one display unit U in FIG. 7, a plurality of
 display units U can be simultaneously displayed along the time series
 similar to FIG. 6. Seven display units U1 to U7 are displayed in FIG. 7.
 And, similar to the case of FIG. 4, the line numbers of the air-flow
 detectors 4a to 4j to output the analog signal attributable to generation
 of the failure are displayed on the line number display part 24 of each
 display unit U. The line numbers are specified by referring to the table
 indicating the reference of the address numbers to the line numbers based
 on the address numbers of the air-flow detectors 4a to 4j affixed to the
 analog signal. But then, the address numbers need not be always affixed to
 each detector in identifying the line numbers. For example, the line
 number can also be specified by an in-line package switch on a circuit
 panel from the hardware viewpoint. This is true for the smoke detectors.
 The line number display part 24 of the highest display unit U1 in FIG. 7
 indicates that the line number is 02. Similar to the case of FIG. 4, the
 letters of "abnormal air-flow (low air-flow)" in a case of "low air-flow",
 and "abnormal air-flow (high air-flow)" in a case of "high air-flow" are
 displayed, respectively, on the judgment result display part 23 as the
 judgment result of the judgment part 84. The judgment result display part
 23 of the highest display unit U1 in FIG. 7 indicates that the judgment
 result is the low air-flow.
 As described above, the display part 20 indicates not only the
 presence/absence of an abnormal air-flow but also the low air-flow or high
 air-flow at the same time, and the monitoring service man can grasp the
 details of the abnormality, and can estimate a cause for the failure and
 take a rapid action thereon. For example, it can be estimated that
 clogging of the sampling pipe 1 or an abnormality in the suction fan 2,
 etc. is generated in a case of the low air-flow, or fracture or the like
 of the sampling pipe 1 is generated in a case of the high air-flow.
 In addition, in the screen for alarming a failure as illustrated in FIG. 7,
 the contents of the failure such as abnormal power supply voltage, a
 blown-out fuse, troubles of disconnection, and troubles in a smoke
 checking part can be displayed as respectively illustrated in the display
 units U3 to U5, and U7. These troubles can be detected by a detecting unit
 not shown in the figure in a similar manner to a conventional method. The
 display units U1 to U7 are arranged in the direction from an upper side to
 a lower side of the display part 20 corresponding to the order of
 generation of troubles in FIG. 7 similar to FIG. 6.
 The display part 20 in FIGS. 4 to 7 described above, is capable of
 automatically achieving the display according to the judgment result of
 the judgment part 84, and when the concentration level or the like is
 desired to be confirmed irrespective of generation of an alarm or a
 trouble, the monitor screen shown in FIG. 8 can be displayed by the
 display part 20 by pressing a monitor display button not shown in the
 figure. In FIG. 8, the letters of "Monitoring the present values of
 smoke/air-flow" are displayed on the top center of the display part 20 in
 order to indicate that the present screen is a screen to alarm the present
 value of the smoke concentration and the air-flow speed, and the judgment
 result display part 23, the line number display part 24, the level display
 part 22, and the detection quantity display part 21 are provided
 therebelow in the right-to-left direction in the figure. If one display
 unit U in FIG. 8 comprises the judgment result display part 23, the line
 number display part 24, the level display part 22, and the detection
 quantity display part 21, a plurality of display units U can be
 simultaneously displayed for each line. Ten display units U1 to U10 are
 displayed in FIG. 8.
 Here, the judgment result display part 23, the line number display part 24,
 and the level display part 22 are similar to the example described above.
 However, in the display part 20 of FIG. 8, the judgment result display
 part 23 and the level display part 22 display the judgment result on the
 smoke concentration, and the concentration level, but the air-flow speed
 is not displayed. The detection quantity display part 21 displays the
 detection quantity of the smoke concentration and the detection quantity
 of the air-flow speed stored in the detection quantity storage part 11.
 For example, in the third display unit U3 from the top, "WARNING" is
 displayed on the judgment result display part 23 to show that the smoke
 concentration exceeds the concentration level set as the threshold for
 warning. Further, "03" is displayed on the line number display part 24 to
 show that the line number is 03. Still further, the ninth level display
 part 22 is displayed in black on the level display part 22, and the ninth
 level display part 22 is bordered in white to show that the maximum
 concentration level is 9. In addition, the numerals 1, 2 and 3 are
 displayed on the sixth, eighth and ninth level display parts 22,
 respectively to show that the concentration levels 6, 8 and 9 are
 respectively set as the threshold for three alarm conditions of "CAUTION",
 "WARNING" and "ABNORMAL". The relative quantities of "93" and "46" are
 displayed on the detection quantity display part 21 to show that the
 present detection quantity is 93 for the smoke concentration and 46 for
 the air-flow speed. The display contents by the judgment result display
 part 23, the level display part 22 and the detection quantity display part
 21 are updated for each polling, and instantaneously changed according to
 the constantly changing contents. The present detected information can be
 constantly grasped irrespective of the presence/absence of alarms or
 troubles by the monitoring service man by providing the display part 20 to
 achieve the display.
 One embodiment of the present invention is described above, but the present
 invention is not limited to the above-described embodiment, but may be
 carried out in various different embodiment in its technical scope, and
 these different embodiments are described below.
 Firstly, in the embodiment, the fire detecting system is constituted as the
 smoke detecting system using the sampling tube, but may be applicable not
 only the display system of the detection system, but also the detected
 information display system of every fire detecting system to display the
 information on the physical quantity of the detector. Further, the
 detector may be those capable of detecting the physical quantity other
 than the smoke concentration or the air-flow speed. That means, the
 display system of the present invention not limited to the smoke
 concentration or the air-flow speed so long as it displays the information
 on the physical quantity.
 In addition, the display part need not be provided on the control panel,
 but may be installed at an arbitrary part separate from the display panel,
 and further, for example, the level display part and the judgment result
 display part can be installed at separate parts from each other. The
 display part can naturally be composed of an arbitrary display device such
 as a plasma display, not a liquid crystal panel. In the above-described
 embodiment, the maximum concentration level is displayed by the bordering
 in white, and the concentration level of the threshold is displayed by the
 display of the numerals, but any mode of display may be acceptable so long
 as it can be visually discriminated from the level display. The level
 display part or the like to be displayed corresponding to the time series
 may be arranged in other directions than the direction from the upper side
 to the lower side, and for example, the direction from the left side to
 the right side may be acceptable. Further, keeping or non-keeping of the
 display contents of the detection quantity display part, the level display
 part or the judgment result display part, or keeping or non-keeping of
 each display screen illustrated in FIG. 4 may be performed in accordance
 with arbitrary standards. For example, the display of the level display
 part illustrated in FIGS. 4 to 8 may be kept without real-time updating
 until the monitoring service man clears it. Alternatively, each display
 screen illustrated in FIGS. 4 to 8 may be kept until cleared by the
 monitoring service man, or may be cleared when the causes for alarms or
 troubles are eliminated.
 The information detected by the air-flow detector may be displayed in the
 same constitution as the information detected by the smoke detector. That
 is, in the above-described embodiment, only the smoke concentration is
 level-converted by the secondary conversion part and displayed on the
 level display part, but it may be displayed on the level display part by
 achieving the similar conversion to the air-flow speed.