Measuring device, disaster prevention system, and method for adjusting measuring device

Abstract

To provide a measuring device, a disaster prevention system, and a method for adjusting the measuring device to realize a mechanism that can detect both flame and smoke and requires less effort to install and maintain devices as compared with a case of installing a fire detector and a smoke detector separately.SOLUTION: A disaster prevention system 1 includes a plurality of measuring devices 10 arranged at substantially equal intervals along a travel direction of a vehicle in a tunnel TN; i.e., a measuring device 10(1), a measuring device 10(2), ..., and a measuring device 10(n). The measuring devices 10 each include a sensor for flame detection, a light-emitting unit 102 that emits light for smoke detection, and a light-receiving unit 103 that receives light for smoke detection. The light-emitting unit 102 of the measuring device 10 (i) emits light toward the light-receiving unit 103 of the adjacent measuring device 10 (i+1). The light-receiving unit 103 of the measuring device 10(i+1) receives light emitted from the light-emitting unit 102 of the measuring device 10 (i) and outputs a signal indicating the intensity of the received light.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a technique for detecting a fire in a tunnel.

Background Art

[0002] A fire may occur in a tunnel due to an accident or the like caused by a vehicle traveling in the tunnel. Since the space inside the tunnel is not open compared to the outside of the tunnel, when a fire occurs, the smoke rapidly fills the tunnel, the visibility deteriorates, and new accidents are caused, so the damage caused by the fire tends to expand. Therefore, many tunnels are equipped with a disaster prevention system for quickly detecting a fire.

[0003] As a patent document disclosing a technique for detecting a fire in a tunnel, for example, there is Patent Document 1. Patent Document 1 describes a fire detection device including a temperature sensor that detects temperature by an optical fiber laid along the longitudinal direction on the inner wall of the tunnel, a camera that is installed at predetermined intervals in the traveling direction of a vehicle in the tunnel and images the inside of the tunnel, and a processing device that detects a fire in the tunnel based on the temperature measured by the temperature sensor and the image captured by the camera.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a tunnel, a plurality of fire detectors are often installed at intervals along the traveling direction of vehicles. Any one of the plurality of sections into which the tunnel is divided is assigned as a monitoring target for those plurality of fire detectors. Therefore, when a fire occurs in the tunnel, it is possible to know in which section of the tunnel the fire is occurring.

[0006] Many of the fire detectors arranged in a tunnel are sensors that are sensitive to light in the wavelength band emitted by a flame, and detect the flame based on the measurement results of the sensors. Therefore, for example, when a flame occurs inside a vehicle and the flame is blocked by a vehicle body or the like from the fire detector, the fire detector cannot detect the fire at an early stage.

[0007] As a device for detecting a fire, in addition to the device of the above-described method for detecting a flame, there is a device of a method for detecting smoke. In the present application, a device of a method for detecting a flame is called a flame detector, and a device of a method for detecting smoke is called a smoke detector, and they are distinguished.

[0008] If a flame detector and a smoke detector are used in combination, even if a flame occurs in a place that becomes a dead angle from the flame detector and the flame detector cannot detect the flame, the smoke detector can detect the smoke generated along with the flame, and the fire can be detected at an early stage.

[0009] However, it takes a great deal of labor to install a plurality of flame detectors and smoke detectors in a tunnel. In addition, the work for maintaining those flame detectors and smoke detectors after installation also becomes a great burden. Therefore, there is a need to reduce the work for installing and maintaining those devices.

[0010] In view of such circumstances, an object of the present invention is to realize a mechanism that can detect both a flame and smoke, and that requires less labor for installing and maintaining those devices as compared with the case where a flame detector and a smoke detector are provided individually.

Means for Solving the Problems

[0011] To solve the above problems, the present invention provides a measurement device including a plurality of measurement devices installed at intervals, the measurement device including a sensor for detecting a flame, a light emitting unit that emits light for detecting smoke, and a light receiving unit that receives light for detecting smoke from an adjacent measurement device.

Effects of the Invention

[0012] According to the present invention, a mechanism is realized that can detect both flames and smoke, and requires less labor for installation and maintenance of these devices compared to the case where a flame detector and a smoke detector are provided separately.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Modes for Carrying Out the Invention

[0014] [Embodiment] Hereinafter, a disaster prevention system 1 according to an embodiment of the present invention will be described. FIG. 1 is a diagram showing the overall configuration of the disaster prevention system 1. The disaster prevention system 1 is a system for detecting a fire occurring in the tunnel TN.

[0015] The disaster prevention system 1 includes n measuring devices, namely, measuring devices 10(1), 10(2), 10(3), ···, 10(n), which are installed at substantially equal intervals along the traveling direction of the vehicle inside the tunnel TN, a disaster prevention receiving board 12 communicatively connected to these measuring devices, a server device 13 communicatively connected to the disaster prevention receiving board 12, a terminal device 14 capable of communicating with the disaster prevention receiving board 12, and a terminal device 15 capable of communicating with the server device 13. The terminal device 14 is a terminal device used by an operator in charge of the installation and maintenance of the disaster prevention system 1. The terminal device 15 is a terminal device used by an administrator who manages the tunnel TN using the disaster prevention system 1.

[0016] Hereinafter, when the measuring devices 10(1), 10(2), 10(3), ···, 10(n) are not distinguished from each other, they are collectively referred to as the measuring device 10.

[0017] FIG. 2 shows the appearance of the measuring device 10 as viewed from the front. The measuring device 10 includes a main body 101, a light emitting unit 102, a light receiving unit 103, a pan-tilt 104 connecting the main body 101 and the light emitting unit 102, and a pan-tilt 105 connecting the main body 101 and the light receiving unit 103.

[0018] The main body 101 includes a housing, a computer housed in the housing, and a sensor group for detecting flames. A window W that transmits light is provided in the housing of the main body 101, and the sensor group in the housing is sensitive to light that enters the housing through the window W from the outside.

[0019] The light emitting unit 102 irradiates light for smoke detection generally in the positive direction of the X axis in FIG. 2.

[0020] The light receiving unit 103 receives the light for smoke detection irradiated generally in the positive direction of the X axis from the same type of device on the negative X axis side of the measuring device 10 in FIG. 2, and outputs a signal according to the intensity of the received light.

[0021] The pan-tilt 104 is a two-axis pan-tilt for adjusting the axis of the light emitted by the light-emitting unit 102. The pan-tilt 104 can adjust the angle around the Y-axis and the angle around the Z-axis of the light-emitting unit 102.

[0022] The pan-tilt 105 is a two-axis pan-tilt for adjusting the axis of the light received by the light-receiving unit 103. The pan-tilt 105 can adjust the angle around the Y-axis and the angle around the Z-axis of the light-receiving unit 103.

[0023] FIG. 3 is a diagram schematically showing a state where the measuring device 10 is installed in the tunnel TN. The measuring device 10 is installed at a predetermined height on the inner wall surface of the tunnel TN, generally at a predetermined interval. In FIG. 3, the light-emitting unit 102 of the measuring device 10(i) (where i is a natural number satisfying 1 ≦ i ≦ n - 1) irradiates the light for smoke detection toward the light-receiving unit 103 of the same type of device adjacent to the left side as viewed from its own device, that is, the measuring device 10(i + 1). Then, the light-receiving unit 103 of the measuring device 10(i + 1) receives the light for smoke detection irradiated from the light-emitting unit 102 of the same type of device adjacent to the right side as viewed from its own device, that is, the measuring device 10(i).

[0024] When smoke is generated near the measuring device 10(i) and the measuring device 10(i + 1), and the smoke reaches between the measuring device 10(i) and the measuring device 10(i + 1), a part of the light for smoke detection irradiated from the measuring device 10(i) is blocked by the smoke, and the intensity of the light received by the measuring device 10(i + 1) decreases. The computer of the measuring device 10(i + 1) determines the presence or absence of smoke in the space between the measuring device 10(i) and the measuring device 10(i + 1) based on the intensity of the light received by the light-receiving unit 103.

[0025] FIG. 4 is a diagram schematically showing the hardware configuration of the measuring device 10. The measuring device 10 first includes a computer 107 that performs various controls of the measuring device 10. The computer 107 includes a processor 1071 that performs data processing according to a program, a memory 1072 that stores various data including the program, an input / output interface 1073 that transfers signals to and from four sensors for flame detection and the like provided in the measuring device 10, and a communication interface 1074 that performs data communication with the disaster prevention receiving board 12.

[0026] In addition to the computer 107, the measuring device 10 includes sensors 108R, 109R, 108L, and 109L for flame detection connected to the computer 107, a light emitting unit 102, and a light receiving unit 103.

[0027] In addition to the components shown in FIG. 4, the measuring device 10 includes a power supply unit that supplies power to the components that consume the power of the measuring device 10, components such as an A / D converter that converts the analog signals output from the four sensors and the light receiving unit 103 into digital signals. However, since they are not related to the features of the present invention, they are omitted in FIG. 4 and their descriptions are also omitted in the following description.

[0028] Sensors 108R and 108L are long-wavelength side optical sensors that respond with high sensitivity to the wavelength band on the long-wavelength side emitted by a flame (heat source). As sensors 108R and 108L, for example, optical sensors using pyroelectric elements are employed. Hereinafter, sensors 108R and 108L are collectively referred to as sensor 108.

[0029] Sensors 109R and 109L are short-wavelength side optical sensors that respond with high sensitivity to the wavelength band on the short-wavelength side emitted by a flame (heat source). As sensors 109R and 109L, for example, optical sensors using photodiodes are employed. Hereinafter, sensors 109R and 109L are collectively referred to as sensor 109.

[0030] Sensors 108R and 109R are sensors for detecting flames occurring in the monitoring area on the right side when viewed from the measuring device 10. Sensors 108L and 109L are sensors for detecting flames occurring in the monitoring area on the left side when viewed from the measuring device 10.

[0031] As shown in FIG. 1, the tunnel TN is divided into a plurality of monitoring areas with the position where the measuring device 10 is installed as a boundary, that is, monitoring areas A(1), A(2), ···, A(n - 1). Hereinafter, these monitoring areas are collectively referred to as monitoring area A.

[0032] The computer of the measuring device 10(i + 1) (where i is a natural number satisfying 1 ≦ i ≦ n - 1) determines the presence or absence of a flame in the monitoring area A(i) based on the light intensity measured by the sensors 108R and 109R of the measuring device 10(i + 1). Also, the computer of the measuring device 10(i + 1) determines the presence or absence of a flame in the monitoring area A(i + 1) based on the light intensity measured by the sensors 108L and 109L of the measuring device 10(i + 1).

[0033] Therefore, for example, a flame in the monitoring area A(i) is redundantly monitored by the sensors 108L and 109L of the measuring device 10(i) and the sensors 108R and 109R of the measuring device 10(i + 1).

[0034] The computer 107 functions as two flame detection devices, one light emission control device, and one smoke detection device by performing various data processes according to the programs stored in the memory 1072 by the processor 1071. The configurations of these devices will be described below.

[0035] FIG. 5 is a diagram schematically showing the configuration of a flame detection device 111 realized by a computer 107. The computer 107 functions as a flame detection device that detects a flame in a monitoring area A on the right side of the measuring device 10 based on the intensity of light indicated by signals output from a sensor 108R and a sensor 109R, and as a flame detection device that detects a flame in a monitoring area A on the left side of the measuring device 10 based on the intensity of light indicated by signals output from a sensor 108L and a sensor 109L. The configurations of these two flame detection devices are both as shown in FIG. 5.

[0036] The flame detection device 111 includes a storage unit 1111, an acquisition unit 1112, a timing unit 1113, a flame determination unit 1114, and a transmission unit 1115.

[0037] The storage unit 1111 is realized by a memory 1072 that operates under the control of a processor 1071. The storage unit 1111 stores various data.

[0038] The acquisition unit 1112 is realized by an input / output interface 1073 that operates under the control of a processor 1071. The acquisition unit 1112 continuously acquires a signal output from the sensor 108 and a signal output from the sensor 109. The amplitude values of those signals acquired by the acquisition unit 1112 are stored in the storage unit 1111 together with the time at that point in time.

[0039] The timing unit 1113 is realized by a processor 1071. The timing unit 1113 continuously measures the elapsed time from a reference time, specifies the current time, and generates a time signal indicating the specified current time.

[0040] The flame determination unit 1114 is implemented by the processor 1071. When the flame determination unit 1114 determines that the amplitude values of the signals output from the sensor 108 and the amplitude values of the signals output from the sensor 109, which are stored in the storage unit 1111, satisfy a predetermined condition, the flame determination unit 1114 causes the storage unit 1111 to store flame detection data indicating that a flame has been detected. Further, when the flame determination unit 1114 determines that the condition is not satisfied, instead of the flame detection data, the flame determination unit 1114 causes the storage unit 1111 to store non-flame detection data indicating that no flame has been detected.

[0041] Examples of the conditions used by the flame determination unit 1114 for determining flame detection are shown below. (Condition 1) The amplitude value of the signal output from the sensor 108 is equal to or greater than the threshold value T1. (Condition 2) The amplitude value of the signal output from the sensor 109 is equal to or greater than the threshold value T2. (Condition 3) The ratio of the amplitude value of the signal output from the sensor 108 to the amplitude value of the signal output from the sensor 109 is equal to or greater than the threshold value T3 and equal to or less than the threshold value T4 (where T3 < T4).

[0042] When all of the above Conditions 1 to 3 are satisfied a predetermined number of times or more within a predetermined time period (for example, 10 seconds) in the past, the flame determination unit 1114 determines that a flame has occurred.

[0043] The transmission unit 1115 is implemented by the communication interface 1074 that operates under the control of the processor 1071. While the flame detection data is stored in the storage unit 1111, the transmission unit 1115 continuously outputs a flame detection signal to the disaster prevention receiving panel 12.

[0044] FIG. 6 is a diagram schematically showing the configuration of the light emission control device 112 implemented by the computer 107. The light emission control device 112 includes a reception unit 1121, a timing unit 1122, and a light emission control unit 1123.

[0045] The receiving unit 1121 is realized by a communication interface 1074 that operates under the control of the processor 1071. The receiving unit 1121 receives light emission timing data indicating the light emission timing from the disaster prevention receiving panel 12 and reference time data for calibrating the reference time used by the timing unit 1122 to measure the current time.

[0046] In this embodiment, after the light emitting unit 102 provided in each measurement device 10 emits light for a predetermined time from the first light emission timing individually instructed by the disaster prevention receiving panel 12, the light emission stops, and after a lapse of a predetermined time, it emits light for a predetermined time again and then stops the light emission, and this operation is repeated. The interval of the light emission is managed based on the time measured by the timing unit 1122. Therefore, the light emission timing data received by the receiving unit 1121 from the disaster prevention receiving panel 12 is data indicating the timing at which the light emitting unit 102 should first emit light.

[0047] The timing unit 1122 is realized by the processor 1071. The timing unit 1122 continuously measures the elapsed time from the reference time, specifies the current time, and generates a time signal indicating the specified current time. The reference time used by the timing unit 1122 is calibrated based on the reference time data received by the receiving unit 1121 from the disaster prevention receiving panel 12. As a result, the time measured by the timing unit 1122 is synchronized with the time measured by the timing unit provided in the measurement device 10.

[0048] The light emission control unit 1123 is realized by the processor 1071. The light emission control unit 1123 specifies the timing to start and end the light emission from the light emitting unit 102 based on the timing indicated by the light emission timing data received by the receiving unit 1121 and the current time measured by the timing unit 1122, and instructs the light emitting unit 102 to start and end the light emission at the specified timing.

[0049] FIG. 7 is a diagram schematically showing the configuration of the smoke detection device 113 realized by the computer 107. The smoke detection device 113 includes a storage unit 1131, a receiving unit 1132, a timing unit 1133, an acquisition unit 1134, a smoke determination unit 1135, and a transmission unit 1136.

[0050] The storage unit 1131 is realized by a memory 1072 that operates under the control of the processor 1071. The storage unit 1131 stores various data.

[0051] The receiving unit 1132 is realized by a communication interface 1074 that operates under the control of the processor 1071. The receiving unit 1132 receives light reception timing data indicating the light reception timing from the disaster prevention receiver 12 and reference time data for calibrating the reference time used by the timing unit 1133 to measure the current time.

[0052] The light reception timing data received by the receiving unit 1132 from the disaster prevention receiver 12 is the same data as the light emission timing data transmitted by the disaster prevention receiver 12 to the light emission control device 112 of the adjacent measuring device 10 that emits light to the light receiving unit 103.

[0053] The timing unit 1133 is realized by the processor 1071. The timing unit 1133 continuously measures the elapsed time from the reference time, specifies the current time, and generates a time signal indicating the specified current time. The reference time used by the timing unit 1133 is calibrated based on the reference time data received by the receiving unit 1132 from the disaster prevention receiver 12. As a result, the time measured by the timing unit 1133 is synchronized with the time measured by the timing unit provided in the measuring device 10.

[0054] The acquisition unit 1134 is realized by an input / output interface 1073 that operates under the control of the processor 1071. The acquisition unit 1134 continuously acquires the signals output from the light receiving unit 103. The amplitude values of those signals acquired by the acquisition unit 1134 are stored in the storage unit 1131 together with the time at that point.

[0055] The smoke determination unit 1135 is implemented by the processor 1071. When the smoke determination unit 1135 determines that the amplitude value of the signal output from the light receiving unit 103 stored in the storage unit 1131 satisfies a predetermined condition, it stores smoke detection data indicating that smoke has been detected in the storage unit 1131. Further, when the smoke determination unit 1135 determines that the condition is not satisfied, it stores, in the storage unit 1131, non-smoke detection data indicating that no smoke has been detected, instead of the smoke detection data.

[0056] Examples of the conditions used by the smoke determination unit 1135 for determining smoke detection are shown below. (Condition 1) The light extinction ratio, which is the ratio of the value obtained by subtracting the amplitude value of the signal output from the light receiving unit 103 from the reference value to the reference value, is equal to or greater than the threshold value U1. (Condition 2) The rate of change of the light extinction ratio over time (the rate of change of the light extinction ratio during a period of unit time) is equal to or greater than the threshold value U2 and equal to or less than the threshold value U3 (however, U2 < U3).

[0057] The reference value used in the above Condition 1 is the amplitude value of the signal output from the light receiving unit 103 in a state where no smoke is generated.

[0058] In a state where no smoke is detected, when both of the above Conditions 1 and 2 are satisfied, the smoke determination unit 1135 determines that smoke is generated. In a state where a flame is detected, while Condition 1 is satisfied, the smoke determination unit 1135 determines that smoke continues to be generated.

[0059] Note that Condition 2 is a condition for preventing false detection of smoke when the intensity of the light received by the light receiving unit 103 rapidly decreases due to an obstacle or when the intensity of the light received by the light receiving unit 103 gradually decreases over a long period of time due to dirt adhering to the measuring device 10.

[0060] The above is the description of the measuring device 10. Below, devices other than the measuring device 10 that constitute the disaster prevention system 1 (FIG. 1) will be described.

[0061] The disaster prevention receiving panel 12 is installed in the tunnel TN. When it receives a flame detection signal or a smoke detection signal from the measuring device 10, it alarms the people around by display or sound, and transmits a notification to the server device 13 that a flame, smoke, or fire has been detected.

[0062] Figure 8 is a diagram schematically showing the hardware configuration of the disaster prevention receiving panel 12. The disaster prevention receiving panel 12 includes a computer 201, a display 121 and an operation unit 122 connected to the computer 201.

[0063] The computer 201 includes a processor 2011 that performs data processing according to a program, a memory 2012 that stores various data including the program, an input / output interface 2013 that inputs and outputs signals between the display 121 and the operation unit 122, and a communication interface 2014 that performs data communication between n measuring devices 10, the server device 13, and the terminal device 14.

[0064] Figure 9 is a diagram schematically showing the functional configuration of the disaster prevention receiving panel 12. That is, when the processor 2011 of the computer 201 executes processing according to a program, a fire detection device indicated by reference numeral 123 in Figure 9 is realized. Hereinafter, the functional configuration of the fire detection device 123 will be described.

[0065] The fire detection device 123 includes a storage unit 1231, an acquisition unit 1232, a timing unit 1233, a fire determination unit 1234, a transmission unit 1235, a display control unit 1236, and an operation reception unit 1237.

[0066] The storage unit 1231 is realized by the memory 2012 that operates under the control of the processor 2011, and stores various data.

[0067] The acquisition unit 1232 is realized by the communication interface 2014 that operates under the control of the processor 2011. The acquisition unit 1232 acquires a flame detection signal and a smoke detection signal from each of the n measuring devices 10.

[0068] The timing unit 1233 is realized by the processor 2011. The timing unit 1233 continuously measures the elapsed time from the reference time, identifies the current time, and generates a time signal indicating the identified current time.

[0069] The fire determination unit 1234 is realized by the processor 2011. The fire determination unit 1234 determines the presence or absence of a fire based on the flame detection signal (the determination result of the flame determination unit 1114) and the smoke detection signal (the determination result of the smoke determination unit 1135) acquired by the acquisition unit 1232.

[0070] Examples of the conditions used by the fire determination unit 1234 for fire detection determination are shown below. (Condition 1) The time during which the flame detection signal is continuously received is equal to or greater than the threshold value V1. (Condition 2) The time during which the smoke detection signal is continuously received is equal to or greater than the threshold value V2. (Condition 3) The time during which both the flame detection signal and the smoke detection signal are continuously received is equal to or greater than the threshold value V3 (however, V3 < V1 and V3 < V2).

[0071] When any one of the above Conditions 1 to 3 is satisfied, the fire determination unit 1234 determines that a fire has occurred.

[0072] Note that Condition 3 is a condition for more quickly determining that a fire has occurred and performing notification, etc., when both flame and smoke are detected, when only flame is detected, or when only smoke is detected.

[0073] The transmission unit 1235 is realized by the communication interface 2014 that operates under the control of the processor 2011. While it is determined by the fire determination unit 1234 that a fire has occurred, the transmission unit 1235 continuously transmits fire notification data to the server device 13. The fire notification data includes the identification information of the tunnel TN, the identification information of the section (monitoring area A) where the fire has occurred, and information indicating the presence or absence of flame and smoke detection.

[0074] Further, the transmission unit 1235 transmits, for example, periodically, data indicating the current time measured by the timing unit 1233 to the measuring device 10 as reference time data. The computer 107 of the measuring device 10 calibrates the reference time of the internal clock based on the reference time data transmitted from the disaster prevention receiving board 12. As a result, the reference times of the timing unit 1122 of the light emission control device 112 and the timing unit 1133 of the smoke detection device 113 realized by the computer 107 are calibrated.

[0075] Also, when the operator sets the reference value of the light reception intensity for the measuring device 10 (described later), the transmission unit 1235 transmits the light emission timing data and the light reception timing data to the two measuring devices 10 that are the targets of those settings.

[0076] The display control unit 1236 is realized by the processor 2011. The display control unit 1236 performs control to display various images on the display 121. For example, when the fire determination unit 1234 determines that a fire has occurred in any of the monitoring areas A, the display control unit 1236 generates image data representing the characters "Fire Detected Area ##", and displays the image represented by the image data on the display 121. Here, "Area ##" is the identification information of the monitoring area A where the fire was detected.

[0077] The operation reception unit 1237 is realized by the input / output interface 2013 that operates under the control of the processor 2011. The operation reception unit 1237 receives operations performed by a user such as an operator on the operation unit 122. Note that the operations performed by the user on the disaster prevention receiving board 12 using the operation unit 122 include, for example, an operation for instructing the start of the operation of the fire extinguishing device controlled by the disaster prevention receiving board 12 at the time of fire detection.

[0078] The above is the description of the disaster prevention receiving board 12. Since the server device 13 (see FIG. 1) is a general server device, the description of its hardware configuration and functional configuration is omitted.

[0079] Since the terminal devices 14 and 15 (see FIG. 1) are general terminal devices, descriptions of their hardware configurations and functional configurations are omitted.

[0080] In order for the disaster prevention system 1 to correctly detect smoke, it is necessary that the optical axes of the light emitting units 102 and the optical axes of the light receiving units 103 provided in two adjacent measuring devices 10 generally coincide. Therefore, when an operator newly installs the measuring device 10 in the tunnel TN, the operator performs an operation of adjusting the directions of the light emitting unit 102 and the light receiving unit 103 by the pan-tilt units 104 and 105. In addition, the operator also performs an operation of setting a reference value of the light reception level of the light receiving unit 103 in accordance with the adjustment of the directions of the light emitting unit 102 and the light receiving unit 103.

[0081] FIG. 10 is a diagram schematically showing a screen (hereinafter referred to as a "setting screen") displayed by the terminal device 14 to assist the operator in adjusting the directions of the light emitting unit 102 and the light receiving unit 103 and setting a reference value of the light reception level of the light receiving unit 103.

[0082] The operator inputs the identification information of the measuring device 10 including the light emitting unit 102 whose optical axis is to be aligned in the "light emitting side device ID" column displayed on the setting screen. In addition, the operator inputs the identification information of the measuring device 10 including the light receiving unit 103 whose optical axis is to be aligned in the "light receiving side device ID" column. Note that these identification information may be input by the terminal device 14 reading a two-dimensional code printed on the housing of the measuring device 10 or the like, for example.

[0083] When the operator inputs identification information into the "Light-emitting side device ID" column and the "Light-receiving side device ID" column and clicks or touches the "OK" button, the identification information is transmitted from the terminal device 14 to the disaster prevention receiving panel 12. When the disaster prevention receiving panel 12 receives the identification information, it instructs the measuring device 10 identified by the light-emitting side device ID to start emitting light, and instructs the measuring device 10 identified by the light-receiving side device ID to start receiving light and transmit an intensity signal indicating the intensity of the received light. In accordance with these instructions, the measuring device 10 on the light-emitting side starts emitting light by the light-emitting unit 102, and the measuring device 10 on the light-receiving side starts receiving light by the light-receiving unit 103. Thereafter, the measuring device 10 on the light-receiving side continuously transmits an intensity signal indicating the intensity of the light measured by the light-receiving unit 103 to the disaster prevention receiving panel 12.

[0084] The disaster prevention receiving panel 12 transmits the intensity signal transmitted from the measuring device 10 on the light-receiving side to the terminal device 14. The terminal device 14 displays the intensity indicated by the intensity signal transmitted from the disaster prevention receiving panel 12 in the "Received light level" column of the setting screen.

[0085] Subsequently, the operator adjusts the direction of the light-receiving unit 103 of the measuring device 10 on the light-receiving side. The light-receiving unit 103 is provided with a scope barrel indicated by the reference numeral SR in FIG. 2. The axis of this barrel is parallel to the optical axis of the light-receiving unit 103. After the operator attaches the objective lens and the eyepiece to the barrel SR, loosens the screw of the pan-tilt 105, adjusts the direction of the light-receiving unit 103 so that the light-emitting unit 102 of the adjacent measuring device 10 facing the scope is visible at the center, and then tightens the screw of the pan-tilt 105 to fix the direction of the light-receiving unit 103.

[0086] Subsequently, the operator adjusts the direction of the light-emitting unit 102 of the light-emitting side measurement device 10. The light-emitting unit 102 is provided with a scope barrel indicated by the symbol ST in FIG. 2. The axis of this barrel is parallel to the optical axis of the light-emitting unit 102. After the operator attaches the objective lens and the eyepiece to the barrel ST, the operator loosens the screw of the pan-tilt 104 and adjusts the direction of the light-emitting unit 102 so that the light-receiving unit 103 of the adjacent measurement device 10 facing the scope can be seen at the center. While adjusting the direction of the light-emitting unit 102, the operator checks the direction in which the numerical value displayed in the "light-receiving level" column of the setting screen shows the highest value. When the operator confirms that the numerical value displayed in the "light-receiving level" column of the setting screen shows the highest value in a state where the light-receiving unit 103 of the adjacent measurement device 10 facing the scope can be seen at the center, the operator tightens the screw of the pan-tilt 104 in that state to fix the direction of the light-emitting unit 102.

[0087] Subsequently, when the operator performs a click operation or a touch operation on the "Settings" button on the setting screen, the disaster prevention receiving panel 12 instructs the light-receiving side measurement device 10 to set the light-receiving intensity displayed in the "light-receiving level" column at that time as a reference value. In accordance with this instruction, the light-receiving side measurement device 10 stores the reference value of the light-receiving intensity in the memory 1072. This reference value is used by the smoke determination unit 1135 of the smoke detection device 113 for smoke detection determination.

[0088] Thereafter, the disaster prevention receiving panel 12 transmits the light-emitting timing data to the light-emitting side measurement device 10 and the light-receiving timing data to the light-receiving side measurement device 10. The disaster prevention receiving panel 12 determines the light-emitting timing and the light-receiving timing of each measurement device 10 so that the light-emitting timings of the light-emitting units 102 of two adjacent measurement devices 10 are shifted, and transmits the light-emitting timing data and the light-receiving timing data indicating the determined timings to the measurement device 10.

[0089] When the light-emitting side measurement device 10 receives the light-emitting timing data from the disaster prevention receiving panel 12, thereafter, the light-emitting unit 102 starts emitting light at the timing indicated by the light-emitting timing data, and thereafter, repeats stopping and restarting the light emission at predetermined intervals.

[0090] When the light-receiving side measurement device 10 receives the light-receiving timing data from the disaster prevention receiving board 12, thereafter, the light-receiving unit 103 starts light reception at the timing indicated by the light-receiving timing data, and then repeats the stop and restart of light reception every predetermined time. The light-receiving side measurement device 10 detects smoke based on the intensity of the light received by the light-receiving unit 103. In this way, the measurement device 10 starts its operation during operation.

[0091] FIG. 11 is a diagram schematically showing a screen (hereinafter referred to as "fire notification screen") displayed on the terminal device 15 when a fire is detected in the tunnel TN. When the server device 13 receives the fire notification data from the disaster prevention receiving board 12, it generates data for instructing the display of the fire notification screen using the information indicated by the fire notification data, and transmits it to the terminal device 15. The terminal device 15 displays the fire notification screen according to the data transmitted from the server device 13.

[0092] On the fire notification screen, information such as in which section of the tunnel TN the fire is detected and whether flames and smoke are detected is displayed. The administrator can quickly take necessary measures by looking at the fire notification screen.

[0093] According to the above-described disaster prevention system 1, since the measurement device 10 includes a sensor for flame detection and a light-emitting unit and a light-receiving unit for smoke detection, both flame and smoke can be detected by installing and maintaining the measurement device 10 in the tunnel. Therefore, compared with the case where a measurement device for flame detection and a measurement device for smoke detection are installed and maintained separately, the labor for installation and maintenance is reduced.

[0094] [Modification Example] The above-described embodiment is a specific example of the present invention, and various modifications are possible within the scope of the technical idea of the present invention. Examples of such modifications are shown below. Note that two or more of the following modification examples may be appropriately combined.

[0095] (1) In the above-described embodiment, the light emitted from the light-emitting unit 102 included in the measuring device 10 is received by the light-receiving unit 103 included in the measuring device 10 installed next to the measuring device 10. Alternatively, a configuration may be adopted in which the light-receiving unit 103 included in the same measuring device 10 receives the reflected light of the light emitted from the light-emitting unit 102 included in the measuring device 10.

[0096] FIG. 12 shows the external appearance of the measuring device 20 according to this modification as viewed from the front. The measuring device 20 is different from the measuring device 10 in that it includes a light-emitting and light-receiving unit 211 having a light-emitting unit and a light-receiving unit instead of the light-emitting unit 102, and a reflecting mirror 212 instead of the light-receiving unit 103.

[0097] The optical axes of the light-emitting unit and the light-receiving unit included in the light-emitting and light-receiving unit 211 are parallel, and if there is a reflecting mirror arranged perpendicular to the direction in which the light emitted from the light-emitting unit travels, the light-receiving unit receives the reflected light of the light emitted from the light-emitting unit after reflection by the reflecting mirror.

[0098] The operator adjusts the directions of the light-emitting and light-receiving unit 211 and the reflecting mirror 212 so that the optical axes of the light-emitting and light-receiving units 211 of two adjacent measuring devices 10 and the normal line of the reflecting surface of the reflecting mirror 212 coincide.

[0099] Even when the disaster prevention system 1 includes the measuring device 20 instead of the measuring device 10, the disaster prevention system 1 can detect both flames and smoke in the tunnel.

[0100] (2) In the above-described embodiments, the light-emitting unit 102 and the light-receiving unit 103 of the measuring device 10 are directly attached to the main body 101. However, the light-emitting unit 102 and the light-receiving unit 103 may be separable while being connected to the main body 101 by a communication line and a power line. FIG. 13 shows the external appearance of the measuring device 30 according to this modification as viewed from the front. Since smoke immediately after generation is generally lighter than air, it rises. Therefore, it is desirable that the light-emitting unit 102 and the light-receiving unit 103 for detecting smoke be installed at as high a position as possible in the tunnel. On the other hand, since the main body 101 includes four sensors for flame detection, a computer, a power supply unit, etc., it is relatively large and heavy compared to the light-emitting unit 102 and the light-receiving unit 103. Therefore, in order to improve the work efficiency of installation and maintenance, it is desirable to install it at as low a position as possible in the tunnel.

[0101] Since the light-emitting unit 102 and the light-receiving unit 103 included in the measuring device 30 are separable from the main body 101, the main body 101 can be installed at a low position, and the light-emitting unit 102 and the light-receiving unit 103 can be installed at a high position, thereby achieving a balance between the speed of smoke detection and the efficiency of installation and maintenance.

[0102] (3) In the above-described embodiments, the adjustment of the optical axes of the light-emitting unit 102 and the light-receiving unit 103 is manually performed using a scope, but the method of adjusting the optical axes is not limited to this. For example, the light-emitting unit 102 may be provided with a laser pointer function that irradiates a laser parallel to the optical axis, and the direction of the light-emitting unit 102 may be adjusted by aiming at the opposing light-receiving unit 103 with the laser.

[0103] Further, the light-emitting unit 102 and the light-receiving unit 103 may be provided with an automatic adjustment mechanism that identifies the posture in which the intensity of the light received by the light-receiving unit 103 is maximized while changing their postures in various directions without human intervention.

[0104] (4) In the above-described embodiment, the measuring device 10 makes a determination for flame detection and a determination for smoke detection, and the disaster prevention receiving board 12 makes a determination for fire detection based on the results of those determinations. These determinations may be made by any of the devices. For example, at least one of the determination for flame detection and the determination for smoke detection may be made by the disaster prevention receiving board 12 or the server device 13. Also, the determination for fire detection may be made by the measuring device 10 or the server device 13.

[0105] (5) In the above-described embodiment, the light emitting units 102 of the respective measuring devices 10 emit light at different timings so that the light for smoke detection emitted by each adjacent or proximate measuring device 10 does not mix. The method for preventing the light for smoke detection from mixing is not limited to this. For example, the light emitting units 102 of the respective measuring devices 10 may emit light in different wavelength bands, and the light receiving unit 103 may be configured to be sensitive to the wavelength band of the light to be received. Also, a configuration may be adopted in which the light emitting units 102 of the respective measuring devices 10 emit light whose intensity changes in different patterns over time, and the light receiving unit 103 measures the intensity of the light that matches the pattern to be received.

[0106] (6) The flame detector included in the above-described measuring device 10 is a two-wavelength flame detector, but the number of wavelength bands may be three or more.

[0107] (7) The flame detector included in the above-described measuring device 10 monitors two regions (the right region and the left region) individually, but it may be a monocular flame detector that monitors only one region.

[0108] (8) Once the smoke detector included in the above-described measuring device 10 receives the light emission timing data and the light reception timing data from the disaster prevention receiving board 12, it then specifies the timing of its own light emission and light reception based on the time information elapsed by the timer included in its own device. Alternatively, a configuration may be adopted in which the disaster prevention receiving board 12 instructs the measuring device 10 to start and end its light emission and light reception for each light emission.

[0109] (9) In the description of the disaster prevention system 1 described above, the conditions for flame detection, the conditions for smoke detection, and the conditions for fire detection used are examples and may be changed in various ways.

Explanation of Signs

[0110] 1... Disaster prevention system, 10... Measuring device, 12... Disaster prevention receiving board, 13... Server device, 14... Terminal device, 15... Terminal device, 20... Measuring device, 30... Measuring device, 101... Main body, 102... Light emitting part, 103... Light receiving part, 104... Pan-tilt, 105... Pan-tilt, 107... Computer, 108... Sensor, 109... Sensor, 111... Flame detection device, 112... Light emission control device, 113... Smoke detection device, 121... Display, 122... Operation unit, 123... Fire detection device, 201... Computer, 211... Light emission and reception unit, 212... Reflecting mirror, 1071... Processor, 1072... Memory, 1073... Input / output interface, 1074... Communication interface, 1111... Storage part, 1112... Acquisition part, 1113... Timing part, 1114... Flame determination part, 1115... Transmission part, 1121... Reception part, 1122... Timing part, 1123... Light emission control part, 1131... Storage part, 1132... Reception part, 1133... Timing part, 1134... Acquisition part, 1135... Smoke determination part, 1136... Transmission part, 1231... Storage part, 1232... Acquisition part, 1233... Timing part, 1234... Fire determination part, 1235... Transmission part, 1236... Display control part, 1237... Operation reception part, 2011... Processor, 2012... Memory, 2013... Input / output interface, 2014... Communication interface.

Claims

1. A measuring device constituting a plurality of spaced measuring devices, said measuring device comprising: A sensor for detecting a flame; A light emitting unit that emits light for smoke detection; A light receiving unit that receives light for smoke detection from an adjacent measuring device; A measuring device comprising:

2. A first measuring device which is the measuring device according to claim 1; A second measuring device, which is the measuring device according to claim 1 and is installed at a distance from the first measuring device; an automatic adjustment mechanism that specifies the postures of the light-emitting unit and the light-receiving unit of the first measuring device and the light-receiving unit of the second measuring device, at which the intensity of light emitted from the light-emitting unit of the first measuring device and received by the light-receiving unit of the second measuring device is maximized, while changing the postures of the light-emitting unit and the light-receiving unit of the second measuring device; A disaster prevention system equipped with:

3. A measuring device according to claim 1 ; A disaster prevention receiving panel communicatively connected to the measuring device; a terminal device that displays whether or not a flame is detected by the measuring device and whether or not smoke is detected by the measuring device according to data transmitted from the disaster prevention receiving panel; A disaster prevention system equipped with:

4. A method for adjusting a measuring device of a disaster prevention system including a plurality of measuring devices according to claim 1, a disaster prevention receiving panel communicatively connected to the plurality of measuring devices, and a terminal device communicable with the disaster prevention receiving panel, A step in which an operator inputs identification information of a light-emitting measuring device and identification information of a light-receiving measuring device into the terminal device; A step in which the terminal device transmits identification information of the light-emitting measuring device and identification information of the light-receiving measuring device to the disaster prevention receiving panel; The disaster prevention receiving panel instructs a measuring device identified by the identification information of the measuring device on the light-emitting side received from the terminal device to start emitting light, and instructs a measuring device identified by the identification information of the measuring device on the light-receiving side received from the terminal device to start receiving light; A measuring device instructed by the disaster prevention receiving panel to start emitting light starts emitting light, and a measuring device instructed by the disaster prevention receiving panel to start receiving light starts receiving light. A method for adjusting a measuring device comprising:

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