Disaster prevention system

Abstract

To facilitate collection of information stored in a fire detector.SOLUTION: This disaster prevention system is provided with a fire detector 1, a disaster prevention receiver board 2 and a dedicated test device 3. The disaster prevention receiver board 2 is connected to the fire detector 1 by a detachable communication line L, and outputs an alarm by receiving a fire detection signal from the fire detector 1 through the communication line L. The dedicated testing device 3 is detachably connected to the communication line L detached from the disaster prevention receiver 2, and receives and outputs information detected by the fire detector 1 from the fire detector 1 through the communication line L.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a disaster prevention system. [Background technology]

[0002] Patent Document 1 describes a fire detection system consisting of a fire detector and a detector tester. In this fire detection system, the fire detector accumulates a failure sign count value that serves as an indicator of the state before a failure (pre-failure state), and can display the failure sign count value in response to a request from the detector tester. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-128720 Summary of the Invention [Problem to be solved by the invention]

[0004] In the fire detection system described in Patent Document 1, a maintenance person must visit each fire detector with a detector tester in order to check the failure sign count value.

[0005] The present invention has been made in view of the above circumstances, and has an object to make it easier to collect information stored in a fire detector. [Means for solving the problem]

[0006] In order to solve the above problems, the disaster prevention system of the present invention comprises a fire detector, a disaster prevention receiving panel connected to the fire detector by a detachable communication line, receiving a fire detection signal from the fire detector via the communication line and outputting an alarm, and a test device to which the communication line removed from the disaster prevention receiving panel is detachably connected, receiving and outputting information detected by the fire detector from the fire detector via the communication line.

[0007] In a preferred embodiment, the fire detector comprises an optical sensor, a fault determination unit that determines whether the value output by the optical sensor satisfies a first condition and outputs a fault detection signal via the communication line if it detects that the first condition is satisfied, and a fault sign determination unit that determines whether the value output by the optical sensor satisfies a second condition that is stricter than the first condition and increases the count value stored in a first counter if it detects that the second condition is satisfied, and the testing device receives information indicating the count value stored in the first counter from the fire detector via the communication line.

[0008] In a further preferred embodiment, the test device receives a fire detection signal from the fire detector via the communication line and outputs an alarm.

[0009] In another preferred aspect, when the failure sign determination unit detects that the value output by the optical sensor satisfies the second condition, it increments a count value stored in a second counter different from the first counter in addition to the count value stored in the first counter, the testing device receives and outputs information indicating the count value stored in the second counter in addition to information indicating the count value stored in the first counter from the fire detector via the communication line, and the fire detector further includes a counter reset unit that periodically resets the count value stored in the first counter and resets the count value stored in the second counter in response to the transmission of information indicating the count value stored in the second counter to the testing device. [Effects of the Invention]

[0010] The present invention facilitates the collection of information stored in fire detectors. [Brief explanation of the drawings]

[0011] [Figure 1] Diagram showing the configuration of the tunnel disaster prevention system [Figure 2] Block diagram showing the hardware configuration of Fire Detector 1 [Figure 3] Block diagram showing the functions of Fire Detector 1 [Figure 4] Block diagram showing the hardware configuration of disaster prevention receiving panel 2 [Figure 5] Block diagram showing the hardware configuration of the dedicated test device 3 DETAILED DESCRIPTION OF THE INVENTION

[0012] 1. Embodiment A tunnel disaster prevention system according to one embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a diagram showing the configuration of a tunnel disaster prevention system according to this embodiment. The system shown in the figure includes a plurality of fire detectors 1, a disaster prevention receiving panel 2, and a dedicated test device 3. Each component will be described below.

[0013] 1-1. Fire detector 1 The fire detectors 1 are two-wavelength flame detectors. They are installed at predetermined intervals along the longitudinal direction on the inner wall of the tunnel T. The fire detectors 1 are also connected to a disaster prevention receiving panel 2 via a communication line L.

[0014] FIG. 2 is a block diagram showing the hardware configuration of this fire detector 1. The fire detector 1 shown in the figure comprises an optical sensor 11, a processor 12, a memory 13, and a communication module 14. Of these, the optical sensor 11 is a sensor for detecting flames. This optical sensor 11 is composed of two light-receiving elements: a pyroelectric element 111 and a photodiode 112. The processor 12 realizes various functions by executing programs stored in the memory 13. The communication module 14 communicates with the disaster prevention receiving panel 2 or the dedicated test device 3 via a communication line L.

[0015] 3 is a block diagram showing various functions realized by the processor 12. The functions shown in the figure include a fire determination unit 121, a failure determination unit 122, a failure sign determination unit 123, a transmission unit 124, and a counter reset unit 125. Each function will be described below.

[0016] The fire detection unit 121 is a function for detecting the occurrence of a fire. The fire detection unit 121 determines whether or not the value output by the optical sensor 11 satisfies a predetermined fire detection condition, and outputs a fire detection signal via the communication line L if it detects that the condition is satisfied.

[0017] The fire determination unit 121 includes a sensor value condition determination unit 1211 and a frequency condition determination unit 1212. Of these, the sensor value condition determination unit 1211 periodically (for example, every second) determines whether or not the output values ​​of the pyroelectric element 111 and the photodiode 112 satisfy all of the following conditions 1-1 to 1-3.

[0018] (Condition 1-1) PE>Th1 (Condition 1-2) PD>Th2 (Condition 1-3) Th3≦PE / PD≦Th4 Here, PE indicates the output value of the pyroelectric element 111, PD indicates the output value of the photodiode 112, and Th1 to Th4 indicate threshold values, respectively.

[0019] The sensor value condition determining unit 1211 stores the determination result ("satisfied" or "unsatisfied") in the determination log storage unit 126 secured in the memory 13. At this time, the determination result is stored in association with the determination date and time.

[0020] The frequency condition determination unit 1212 periodically determines whether the number of times the above conditions 1-1 to 1-3 have been satisfied within the most recent predetermined period (for example, 3 minutes) is equal to or greater than a predetermined number N1, with reference to the determination log storage unit 126. If the determination result is positive, a fire detection signal is output via the communication line L. On the other hand, if the determination result is negative, a fire detection signal is not output.

[0021] Next, the failure determination unit 122 has a function for detecting an abnormality in the optical sensor 11. The failure determination unit 122 determines whether or not the value output by the optical sensor 11 satisfies a predetermined failure determination condition, and outputs a failure detection signal via the communication line L if it detects that the condition is satisfied.

[0022] The fault determination unit 122 includes a sensor value condition determination unit 1221 and a frequency condition determination unit 1222. Of these, the sensor value condition determination unit 1221 periodically (for example, every second) determines whether the output values ​​of the pyroelectric element 111 and the photodiode 112 satisfy both of the following conditions 2-1 and 2-2.

[0023] (Condition 2-1) PE>Th5 (Condition 2-2) PE / PD>Th6 Here, Th5 and Th6 each represent a threshold value.

[0024] The sensor value condition determining unit 1221 stores the determination result ("satisfied" or "unsatisfied") in the determination log storage unit 127 secured in the memory 13. At this time, the determination result is stored in association with the determination date and time.

[0025] The frequency condition determination unit 1222 periodically determines whether the number of times the above conditions 2-1 and 2-2 have been satisfied within the most recent predetermined period (for example, 3 minutes) is equal to or greater than a predetermined number N2, with reference to the determination log storage unit 127. If the determination result is positive, a fault detection signal is output via the communication line L. On the other hand, if the determination result is negative, no fault detection signal is output.

[0026] Next, the failure sign determination unit 123 has a function for detecting a sign of abnormality in the optical sensor 11. This failure sign determination unit 123 determines whether or not the value output by the optical sensor 11 satisfies a predetermined failure sign determination condition, and if it detects that the condition is satisfied, it increments the count values ​​stored in a first counter 129 and a second counter 130, which will be described later.

[0027] The failure sign determination unit 123 includes a sensor value condition determination unit 1231 and a frequency condition determination unit 1232. Of these, the sensor value condition determination unit 1231 periodically (for example, every second) determines whether the output values ​​of the pyroelectric element 111 and the photodiode 112 satisfy both of the following conditions 3-1 and 3-2.

[0028] (Condition 3-1) PE>Th7 (Condition 3-2) PE / PD>Th6 Here, Th7 denotes a threshold value. This threshold value Th7 is set to a value smaller than the above threshold value Th5. Therefore, condition 3-1 is more likely to be met than the above condition 2-1. And condition 3-2 is the same as the above condition 2-2. Therefore, the failure sign determination condition is more likely to be met than the failure determination condition. In other words, the former condition is stricter than the latter condition.

[0029] The sensor value condition determining unit 1231 stores the determination result ("satisfied" or "unsatisfied") in the determination log storage unit 128 secured in the memory 13. At this time, the determination result is stored in association with the determination date and time.

[0030] The frequency condition determination unit 1232 periodically determines whether the number of times the above conditions 3-1 and 3-2 have been satisfied within a recent predetermined period (for example, 3 minutes) is equal to or greater than a predetermined number N2, with reference to the determination log storage unit 128. If the determination result is affirmative, the count value stored in the first counter 129 secured in the memory 13 and the count value stored in the second counter 130 also secured in the memory 13 are incremented.

[0031] Next, the transmitting unit 124 has a function for receiving a request from the dedicated test equipment 3 and outputting count value information including information indicating the count value of the first counter 129 and information indicating the count value of the second counter 130 via the communication line L.

[0032] The counter reset unit 125 has a function for resetting the count value of the first counter 129 or the second counter 130. The counter reset unit 125 resets the count value of the first counter 129 when a normal state continues for a predetermined time (e.g., 24 hours). In other words, the counter reset unit 125 resets the count value of the first counter 129 when a state in which no sign of abnormality is detected by the failure sign determination unit 123 continues for a predetermined time. In contrast, the count value of the second counter 130 is reset when count value information is transmitted to the dedicated test device 3. The above is the explanation of the fire detector 1.

[0033] 1-2. Disaster prevention receiving panel 2 The disaster prevention receiving panel 2 is a device that receives abnormality detection signals from the fire detectors 1 and outputs an alarm. As shown in Figure 1, this disaster prevention receiving panel 2 is installed in the electrical room R of the tunnel T. In addition, this disaster prevention receiving panel 2 is connected to each fire detector 1 via a communication line L. This communication line L is detachable from a terminal (not shown) of the disaster prevention receiving panel 2.

[0034] 4 is a block diagram showing the hardware configuration of the disaster prevention receiving panel 2. The disaster prevention receiving panel 2 shown in the figure includes a processor 21, a memory 22, a communication module 23, a plurality of indicator lights 24, a display 25, a speaker 26, and an operation unit 27. Of these, the processor 21 realizes the function of an alarm unit 211 by executing a program stored in the memory 22. The communication module 23 communicates with the fire detector 1 via a communication line L.

[0035] The alarm unit 211 realized by the processor 21 has a function for receiving an abnormality detection signal from the fire detector 1 and outputting an alarm. When the alarm unit 211 receives a fire detection signal from the fire detector 1, it turns on the red indicator light 241, displays a message notifying the occurrence of a fire on the display 25, and outputs an alarm sound from the speaker 26. On the other hand, when it receives a fault detection signal from the fire detector 1, it flashes the green indicator light 242, displays a message notifying the occurrence of a fault on the display 25, and outputs an alarm sound from the speaker 26. This concludes the explanation of the disaster prevention receiving panel 2.

[0036] 1-3. Dedicated test equipment 3 The dedicated test device 3 is a device for testing the fire detector 1. As shown in FIG. 1, this dedicated test device 3 is installed in the electrical room R of the tunnel T. This dedicated test device 3 has a terminal (not shown), and during testing, the communication line L removed from the disaster prevention receiving panel 2 is detachably connected to this terminal. The dedicated test device 3 communicates with the fire detector 1 via this communication line L. Then, when the test is completed, the communication line L is removed from the terminal and reconnected to the terminal of the disaster prevention receiving panel 2.

[0037] 5 is a block diagram showing the hardware configuration of the dedicated test device 3. The dedicated test device 3 shown in the figure includes a processor 31, a memory 32, a communication module 33, a display 34, a speaker 35, and an operation unit 36. Of these, the processor 31 executes a program stored in the memory 32 to realize the functions of an alarm unit 311 and a failure sign data display unit 312. The communication module 33 communicates with the fire detector 1 via a communication line L.

[0038] Among the functions realized by the processor 31, the alarm unit 311 is a function for receiving an abnormality detection signal from the fire detector 1 and outputting an alarm. When the alarm unit 311 receives a fire detection signal from the fire detector 1, it displays a message notifying the occurrence of a fire on the display 34 and outputs an alarm sound from the speaker 35. Therefore, a maintenance person can know that a fire has occurred even during a test in which the fire detector 1 is not connected to the disaster prevention receiving panel 2. On the other hand, when it receives a fault detection signal from the fire detector 1, it displays a message notifying the occurrence of a fault on the display 34 and outputs an alarm sound from the speaker 35. Therefore, a maintenance person can know that a fault has occurred even during a test in which the fire detector 1 is not connected to the disaster prevention receiving panel 2.

[0039] When a maintenance technician selects any fire detector 1 using the operation unit 36, the failure sign data display unit 312 acquires count value information from the selected fire detector 1 and displays it on the display 34. Of the count value information displayed on the display 34, the count value of the first counter 129 is a count value that is reset when a normal state continues for a predetermined period of time (e.g., 24 hours). Therefore, by referring to this count value, the maintenance technician can ignore noise-like failure signs and check only failure signs that are likely to result in an imminent failure. On the other hand, the count value of the second counter 130 is a count value that is reset when count value information is transmitted to the dedicated test device 3. In other words, it is a count value that begins counting from the point in time when the previous count value information was acquired. Therefore, by referring to this count value, the maintenance technician can know the number of failure signs that have been detected since the previous test. This concludes the explanation of the dedicated test device 3.

[0040] According to the tunnel disaster prevention system described above, by reconnecting the communication line L connected to the disaster prevention receiving panel 2 to the dedicated test device 3, the count value information can be received and displayed by this dedicated test device 3. Therefore, maintenance personnel do not need to go to the trouble of visiting each fire detector 1 to obtain the count value information. In other words, according to this system, it is easy to collect the information stored in the fire detectors 1.

[0041] 2. Variations The above embodiment may be modified as follows: The modifications described below may be combined with each other.

[0042] 2-1. Variation 1 In the above embodiment, threshold value Th7 is set to a value smaller than threshold value Th5 in order to make the failure sign determination conditions stricter than the failure determination conditions. Alternatively, threshold value Th7 and threshold value Th5 may be set to the same value, and the value of the number of times N2 referenced in the failure sign determination may be set to a value smaller than the value of the number of times N2 referenced in the failure determination, thereby making the failure sign determination conditions stricter than the failure determination conditions.

[0043] 2-2. Variation 2 The above-mentioned fire determination conditions, failure determination conditions, and failure sign determination conditions are merely examples. These conditions may be changed as appropriate according to the needs of the manager of tunnel T. For example, the failure determination conditions and failure sign determination conditions may be used as conditions for determining an abnormality or a sign of an abnormality in the photodiode 112 instead of the pyroelectric element 111.

[0044] 2-3. Variation 3 The failure symptom data display unit 312 acquires information indicating the count values ​​of both the first counter 129 and the second counter 130, but may selectively acquire information indicating only one of the count values.

[0045] 2-4. Variation 4 The dedicated test device 3 may further have a function as a log information display unit that acquires the log information stored in some or all of the judgment log storage units 126, 127, and 128 of the fire detector 1 and displays it on the display 34.

[0046] 2-5. Variation 5 The above-described tunnel disaster prevention system is an example of an application of the present invention, but the present invention may also be applied to disaster prevention systems installed in buildings other than tunnels.

[0047] 2-6. Variation 6 The failure sign data display unit 312 provided in the dedicated test device 3 may be provided in the disaster prevention receiving panel 2. That is, the disaster prevention receiving panel 2 may receive the count value information and display it on the display 25. In this case, the dedicated test device 3 may be connected to the disaster prevention receiving panel 2 by wire or wirelessly, and the count value information stored in the disaster prevention receiving panel 2 may be read and displayed on the display 34.

[0048] 2-7. Variation 7 All or some of the fire determination unit 121, the failure determination unit 122, and the failure sign determination unit 123 provided in the fire detector 1 may be provided in the disaster prevention receiving panel 2. In this case, the fire detector 1 periodically transmits information indicating the output value of the optical sensor 11 to the disaster prevention receiving panel 2 to enable determination processing in the disaster prevention receiving panel 2. Furthermore, when the failure sign determination unit 123 is provided in the disaster prevention receiving panel 2, the counter reset unit 125 is also provided in the disaster prevention receiving panel 2. [Explanation of symbols]

[0049] 1...fire detector, 2...disaster prevention receiving panel, 3...dedicated test device, 11...optical sensor, 12, 21, 31...processor, 13, 22, 32...memory, 14, 23, 33...communication module, 24...indicator light, 25, 34...display, 26, 35...speaker, 27, 36...operation unit, 111...pyroelectric element, 112...photodiode, 121...fire judgment unit, 122...failure judgment unit, 123...failure sign judgment unit, 12 4...Transmitter, 125...Counter reset unit, 126, 127, 128...Judgment log storage unit, 129...First counter, 130...Second counter, 211, 311...Alarm unit, 241...Red indicator light, 242...Green indicator light, 312...Failure sign data display unit, 1211, 1221, 1231...Sensor value condition judgment unit, 1212, 1222, 1232...Frequency condition judgment unit, L...Communication line, R...Electrical room, T...Tunnel

Claims

1. Multiple fire detectors; a disaster prevention receiving panel that is connected to the plurality of fire detectors by a detachable communication line, receives a fire detection signal from at least one of the plurality of fire detectors via the communication line, and outputs an alarm; a test device to which the communication line removed from the disaster prevention receiving panel is detachably connected; Equipped with Each of the plurality of fire detectors a sensor for detecting a fire; a fault determination unit that determines whether or not a value output by the sensor satisfies a first condition, and that outputs a fault detection signal via the communication line when it detects that the first condition is satisfied; a failure sign determination unit that determines whether or not the value output by the sensor satisfies a second condition that is satisfied at a stage before the first condition is reached, and that increments the count value stored in a first counter when it is detected that the second condition is satisfied; Equipped with The test device comprises: an alarm unit that outputs an alarm notifying the occurrence of a malfunction when the malfunction detection signal is received from at least one of the plurality of fire detectors via the communication line; an operation unit used for selecting a fire detector from the plurality of fire detectors; a failure sign data display unit that acquires information indicating the count value stored in the first counter from the fire detector selected using the operation unit via the communication line and displays the information on a display; Equipped with A disaster prevention system characterized by:

2. the failure sign determination unit stores log information including a determination result as to whether the second condition is satisfied and a determination date and time in a determination log storage unit; The test device further includes a log information display unit that acquires the log information stored in the determination log storage unit from at least one of the plurality of fire detectors via the communication line and displays the log information on the display.

2. The disaster prevention system according to claim 1.

3. when detecting that the value output by the sensor satisfies the second condition, the failure sign determination unit increments a count value stored in the first counter and a count value stored in a second counter different from the first counter; the failure sign data display unit acquires information indicating the count value stored in the second counter in addition to information indicating the count value stored in the first counter from the selected fire detector via the communication line, and displays the information on the display; Each of the plurality of fire detectors further includes a counter reset unit that resets the count value stored in the first counter when a state in which the failure sign determination unit does not detect that the value output by the sensor satisfies the second condition continues for a predetermined time, and resets the count value stored in the second counter when information indicating the count value stored in the second counter is transmitted to the testing device.

3. The disaster prevention system according to claim 1 or 2.

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