JPH0620181A - Disaster preventing detecting device and disaster prevention system - Google Patents

Abstract

PURPOSE:To confirm whether a fire and the like breaks out actually or not by acquiring an actual state in the vicinity of a sensor element by a video output signal from an image pickup means together with detection output from the sensor element. CONSTITUTION:For instance, in a fire detection system for a tunnel, flame detectors S1 to Sn are arranged in the tunnel at proper intervals, e.g. the intervals of 25m. Each flame detector S1 consists of a flame detecting part 10 constituted so as to include an infrared ray receiving element 11 to detect an infrared ray contained in a flame and a picture information part 20 for sending the picture information of the vicinity of the flame detector 10 to a receiving part. When it is judged that the flame is present by the flame judging part of the flame detecting part 10, a fire output signal F5 is outputted and sent to a line L1 through the terminal T1 of a connector. The picture information part 20 is provided with a television camera picture output part 21 set so as to image-pick up the same direction as the flame detecting direction of the infrared ray receiving element 11, and a picture output control signal VC is inputted to the terminal T2 automatically or by manual operation in response to the fire output signal F5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster detection device and disaster prevention system.

[0002]

2. Description of the Related Art Conventionally, an appropriate sensor is provided for detecting a fire occurrence or a leak of harmful gas, and an alarm is output in response to an output from the sensor in order to minimize damage such as a fire. Various disaster prevention systems are known. As one of such disaster prevention systems, for example, in order to promptly detect the occurrence of a fire in a tunnel, a large number of flame detectors are arranged in the tunnel at predetermined intervals, and a flame is generated in each flame detector. When it is determined that the determination is made, a configuration is known in which the determination result is notified to the receiving unit. According to this conventional system, when a fire is detected, appropriate measures such as prohibiting passage in a tunnel are taken and damage caused by the fire can be minimized.

[0003]

By the way, in a large tunnel having a tunnel length of about 3 km, for example, 200
Since a TV camera for monitoring is installed every m,
When a fire is detected, you can easily see the surroundings of the flame detector that issued the alarm through the TV camera at the central monitoring center, but in a medium-sized tunnel, this kind of TV camera is installed. It has not been. Therefore, in a fire detection system for medium-sized tunnels that does not have a surveillance TV camera installed, if one of the flame detectors reports, a person in charge rushes to the scene to determine whether a fire has actually occurred. It is necessary to take appropriate measures after confirming that, and the burden for this is great.

Although the case of a fire in a tunnel has been described above as an example, various disaster prevention systems such as a fire detection system installed in a warehouse, an office that is unattended at night, or the like have similar problems. .

It is an object of the present invention to provide a disaster prevention detecting device and a disaster prevention system which can solve the above-mentioned problems in the prior art.

[0006]

The disaster prevention detector of the present invention is used for disaster prevention such as fire occurrence detection or harmful gas leakage detection, and a predetermined physical phenomenon for disaster prevention. For example, it is provided with a sensor element for detecting the generation of smoke, flame, heat, leakage of harmful gas, and the like, and an image pickup means for picking up an image in the vicinity of the sensor element. Here, this disaster prevention detection device, when a predetermined output for disaster prevention from the sensor element, for example, the detection output of the required smoke, heat, flame or leakage of harmful gas, etc. is obtained,
A video output signal may be output from the image pickup means.

The disaster prevention system of the present invention is a disaster prevention system in which a fire occurrence or a harmful gas leak is detected in a predetermined area and the result is sent to a monitoring center. A sensor element for detecting the occurrence of a physical phenomenon, an image pickup means for picking up an image of the inside of a predetermined area, and the image pickup in response to a predetermined output for disaster prevention being obtained from the sensor element. Output control means for outputting a video output signal from the means,
A transmission means for sending the disaster prevention detection signal and the video output signal corresponding to the output of the sensor element to the monitoring center, and an image display device provided in the monitoring center to which the previous video output signal is input.

The image pickup means may be configured to be operated according to a command from the monitoring center. That is, when an alarm is given to the monitoring center, for example, a staff member of the monitoring center inputs a video output signal from a required image pickup means to a video monitoring device installed in the monitoring center to visually check the situation at the site. It may be configured to.

[0009]

With the image output signal from the image pickup means together with the detection output from the sensor element, the image output signal showing the actual state near the sensor element can be obtained. In the case of a system that sends the detection result of the sensor element to the monitoring center, the image output signal from the image pickup means is sent to the monitoring center automatically when a predetermined output for disaster prevention is obtained from the sensor element or by manual operation. Therefore, the state of the site can be visually confirmed by the image display device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. As an embodiment of the present invention, FIG. 1 shows a fire detection system 1 for a tunnel, which is a disaster prevention system for detecting the occurrence of a fire in a tunnel by using a flame detection device to help prevent the occurrence of a disaster. It is shown schematically.

A tunnel fire detection system 1 shown in FIG.
In the figure, Q is a receiver, A is a trunk line, and includes a power line A1 and a ground line A2. The first signal line L includes 1 line L1, 2 lines L2, ..., N line Ln, which are individually wired corresponding to the flame detection devices S1, S2 ,. The signal line M is also the flame detection device S1,
.., Sn are wired independently of one line M1, two lines M2, ..., N lines Mn. Then, these lines indicate that each flame detection device S1
To Sn, connectors C1, C2, ...
.., Cn are connected to the flame detection devices S1 to Sn as shown in the figure. The flame detection devices S1 to Sn are arranged in the tunnel at an appropriate interval, for example, 25 m.

FIG. 2 is a detailed block diagram showing the structure of the flame detecting device S1. The flame detection device S1 is configured as a disaster prevention detection device that can detect the occurrence of a flame, which is one of the physical phenomena that occur during a fire, and is for detecting infrared rays contained in the flame. It includes a flame detecting section 10 including an infrared light receiving element 11 which functions as a sensor element, and an image information section 20 for transmitting image information in the vicinity where the flame detecting section 10 is arranged to a receiving section Q. There is.

First, the flame detector 10 will be described.
The output electric signal F1 from the infrared light receiving element 11 is the amplifier 1
After being amplified by 2, the amplified output signal F2 is input to the bandpass filter 13. The bandpass filter 13 is for passing only the flicker frequency component peculiar to the flame of the amplified output signal F2, and the flicker component signal F3 selected by the bandpass filter 13 is selected.
Is input to the flicker number counting unit 14.

The flicker number counting unit 14 counts the number of flicker numbers included in the flicker component signal F3 within a certain period of time, and outputs a count signal F4 indicating the counting result to the flame determination unit 15 to output the flame. The determination unit 15 is configured to determine the presence or absence of flame. When the flame determination unit 15 determines that there is a flame, the fire output signal F5 is output from the flame determination unit 15 and sent to the one line L1 via the terminal T1 of the connector C1.

In this embodiment, the flame detecting device S1 has a configuration for processing the output from the infrared light receiving element 11 which is a sensor element used for flame detection to determine the presence or absence of flame.
Although the configuration incorporated therein is shown, the configuration for determining the presence or absence of the flame does not necessarily have to be built in the flame detection device S1, and the configuration for determining the presence or absence of the flame is provided in the receiving unit Q. It may be configured.

Further, in order to detect the occurrence of a fire or the like in the tunnel, instead of detecting the flame, an appropriate structure for detecting other physical phenomena caused by the occurrence of the fire, such as the generation of heat and the generation of smoke. May be Further, for disaster prevention, a configuration for detecting leakage of harmful gas may be added thereto, or a tunnel disaster prevention system that only detects leakage of such harmful gas may be configured. Is also possible.

When the receiving section Q receives the fire output signal F5 from the flame detecting device S1, it is confirmed whether or not this judgment in the flame detecting device S1 is true without the staff going to the installation place of the flame detecting device S1. In order to be able to do so, the flame detection device S1 has an image information unit 20.

The image information section 20 has a TV camera image output section 21 set so as to pick up an image in the same direction as the flame detection direction of the infrared light receiving element 11, and an image output signal from the TV camera image output section 21. The V1 is band-compressed by the image compression unit 22, the error correction code is added to the compressed image data V2 by the error correction code addition unit 23, and the transmission image data V3 is obtained.

An image output control signal VC sent from the receiving section Q via the first line M1 of the second signal line M is supplied to the control input terminal 20a of the image information section 20 via the terminal T2 of the connector C1. The image output control signal VC is input to the image output control unit 24. The image output control unit 24 sends the image data transmission command signal VM to the image data output unit 25 in response to the application of the image output control signal VC, whereby the transmission image data V3 passes through the image data output unit 25. It is sent to the image output terminal 20b and sent to the image data line N dedicated to image data via the terminal T3 of the connector C1.

Although the configuration of the flame detecting device S1 has been described above, the other flame detecting devices S2, ..., Sn have exactly the same configuration, so the description of those configurations will be omitted. Although each flame detection device has been described with reference to FIG. 2 as having only one infrared light receiving element, it is well known that two infrared light receiving elements are provided and the directions of these infrared light receiving elements are different by 90 degrees. Therefore, one flame detection device may be configured to obtain a monitoring range of 180 °. In this case, it is preferable to provide two image information parts corresponding to each infrared light receiving element. Also, the flame detection unit 1
0 and the image information section 20 can be configured to be housed in one housing. According to this configuration, since only one housing is required, the cost can be reduced, and the wiring can be simplified. In this case, the configuration may be such that only the television camera image output unit 21 and the infrared light receiving element 11 are housed in the housing.

Next, the configuration of the receiving section Q will be described with reference to FIG. The reception unit Q has a reception processing unit 31 having a function of processing a fire output signal input via the first signal line L and displaying a flame detection device that has sent the fire output signal. .

The reception processing unit 31 also has a function of sending an image output control signal VC to the issued flame detection device by using the second signal line M.

In FIG. 3, reference numeral 40 indicates that
The image information processing unit is an image data input unit 41 that receives image data for transmission V3 sent via the image data line N, output data Y1 output from the image data input unit 41, and expands the image data. An image data decompression unit 42 for processing, a decompression unit for decompressing the decompressed decompressed image data Y2 and deleting the error correction code added to the destination, and transmitting the resulting image data Y3 to the image data control unit 44. Has 43.

The image data control unit 44 causes the image data display unit 45 to display the image data Y3 in accordance with the control signal Y4 from the reception processing unit 31 and / or a control center (not shown) that controls the reception unit Q. The image data output unit 46 for sending the image data Y3 is controlled to supply the image data Y3.

Therefore, according to the above configuration, when a certain flame detecting device detects a flame and sends the fire output signal F5 to the receiving section Q via the first signal line M, the receiving section Q issues a warning. After the flame detection device is identified and displayed, the image output control signal VC is sent to the flame detection device using the second signal line M. As a result, the transmission image data V3 is sent to the image information processing unit 40 via the image data line N.

The image information processing unit 40 extracts the required image data contained in the transmission image data V3,
A desired image is displayed on the image data display unit 45. Here, the image may be displayed by displaying only one still image from the flame detection device, but the flame detection device sequentially sends out still images at appropriate time intervals, and outputs these sequentially. Image data display of a series of still images one after another 4
It is more preferable to display by 5. The reason is that when a series of still images are displayed by the image data display 45 one after another, the appearance of smoke and / or flame in the vicinity thereof,
This is because the running state of the vehicle, the movement of the person, and the like can be obtained as clearer visual information.

Therefore, when the fire output signal F5 is output from the flame detecting device arranged in the tunnel, the image near the flame detecting device is displayed on the image data display section 45, and the staff member can display this image. From the captured image, it is possible to reliably confirm whether or not a fire has really occurred while staying there. Therefore, it is possible to take appropriate measures against the fire output signal almost at the same time as the fire output signal is generated, and immediately after the fire occurs, the tunnel is closed to prevent the fire from spreading. In this case, in order to more accurately grasp the situation at the site, in addition to the transmission image data from the flame detection device that issued the alarm, for example, transmission image data from another flame detection device adjacent to it Needless to say, it is also possible to monitor.

In the tunnel fire detection system 1 shown in the above embodiment, when a warning is issued, this warning information is once sent to the center side, and the desired image information section is activated in the center. 2, the image data for transmission is sent to the center, but in FIG. 2, for example, the fire output signal F5 output from the terminal T1 is also supplied to the terminal T2 as shown by the dotted line to generate the fire output signal F5. When this happens, instead of the image output control signal VC, the fire output signal F5
Alternatively, the transmission image data V3 may be transmitted to the image data line N. With this configuration, when the fire output signal F5 is generated, the related image information can be immediately and automatically sent to the center side, and a fire or the like can be promptly dealt with. When such a configuration is adopted, the second signal line M from the first line M1 to the n-th line Mn shown in FIG. 1 is unnecessary.

Further, when the image information section is made to output the image data for transmission in response to the fire output signal, which image information section is to be operated can be appropriately determined, and the image information section to be activated. Is not limited to only the image information section corresponding to the fire output signal output at that time.

FIG. 4 shows another embodiment of the disaster prevention system according to the present invention. The sensors W1 to W shown in FIG.
n itself does not have a fire judging function,
This embodiment is different from the embodiment shown in FIG. 1 in that the data corresponding to the output signal obtained by the infrared light receiving element is sent to the receiving portion P, and the receiving portion P judges the fire.

In FIG. 4, W1 to Wn are fire detection devices for detecting a fire, and from the receiving part P, a power line 2, a ground line 3, an address control line 4, a first signal line 5 and a second signal. The line 6 extends along the arrangement direction of the fire detection device in the tunnel, and these lines 2 to 6 are connected via the connector pairs C1 to Cn provided corresponding to each fire detection device. Through Wn are connected as shown.

Therefore, power is supplied to each of the fire detection devices W1 to Wn via the power supply line 2 and the ground line 3, and the fire designated by the address signal sent from the receiver P to the address control line 4 is specified. The output from the detector is
The configuration is such that the signal is input to the receiving unit P via the first signal line 5.

FIG. 5 is a block diagram showing the construction of the fire detection device W1. Of the parts shown in FIG. 5, those parts that are the same as the parts shown in FIG. 2 are given the same reference numerals, and descriptions thereof will be omitted. In FIG. 5, the amplified output signal F2 is converted into a digital signal by the analog-digital (A / D) converter 51. The converted digital signal G1 is sent to the first signal line 5 as serial data from the data output section 52.

Due to the function of the serial communication interface section 55 connected to the address line 4, the address setting section 53 can appropriately set the address data from the receiving section P, and this address data is controlled by the address. Given to part 54. The serial communication interface unit 55 also has a function of giving the address command data from the receiving unit P to the address control unit 54. The address control unit 54 compares and collates the address data sent from the serial communication interface unit 55 with its own address data, and when the receiving unit P commands its own address, the first digital signal G1 is output.
It is configured to send to the signal line 5.

The serial communication interface unit 55 is
Further, the image information unit 20 also has a function of sending the image output control signal VC to the image information unit 20, and the image information unit 20 receives the image output control signal VC to send the transmission image data V3 to the second signal line. Send to 6.

FIG. 6 shows an internal detailed view of the receiving section P. The receiving unit P is roughly the same as a microcomputer board, and has a CPU 61 that controls all controls, a ROM 62 that stores programs, a RAM 63 that temporarily stores data for various arithmetic controls and that stores necessary data from a fire detection device, Real-time clock generator 6 for managing the time etc. of the data input from the fire detection device
4, the serial communication interface circuit 65 and the data input circuit 66 have a known structure. The image information processing unit 40 described in detail with reference to FIG. 3 is connected to the bus 67 connecting these.

The ROM 62 stores a processing program for comprehensively determining the presence or absence of a fire in the tunnel according to the detection output from each of the fire detection devices W1 to Wn. It is configured to accurately determine whether the flame detection signal is output from the detection device. In any case, in the receiver P,
The fire detection device that detects the flame will be specified.

When the fire detecting device detecting the flame is specified in the receiving portion P, the image output control signal VC is automatically sent to the corresponding fire detecting device through the serial communication interface circuit 65, and the corresponding fire detecting device is detected. The transmission image data V3 from the image information unit 20 incorporated in the fire detection device is sent to the image information processing unit 40 via the second signal line 6.

Therefore, as in the case of the above-described embodiment, at the receiving portion P, the staff member can confirm whether or not a fire has really occurred, while having the same effect. .

FIG. 7 shows a modification of the fire detection system shown in FIG. The system of FIG. 4 is configured to send the output signals from the fire detection devices W1, W2, ..., Wn to the reception unit P using two signal lines.
In the system shown in FIG. 7, the fire detection devices X1, X2, ...
.. The two are different in that the signal from Xn is sent to the receiving unit R by only one signal line H.

FIG. 8 shows the construction of the fire detection device X1. In FIG. 8, the portions corresponding to the respective portions of the other embodiments are designated by the same reference numerals, and the description thereof will be omitted. In the fire detection device X1 shown in FIG. 8, the digital data G1 is input to the image compression unit 22, and the output from the infrared light receiving element 11 is sent using the image data transmission route.

The operation of setting the address from the receiving unit R and specifying the address is the same as the configuration shown in FIG.

FIG. 9 shows a block diagram of the receiving unit R. In FIG. 9, the same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. In the reception unit R, the image data communication unit 47 divides the signal sent via the signal line H into the transmission image output Y1 and the digital data G1 which is the output signal component from the infrared light receiving element 11. belongs to.

Next, the operation of the system shown in FIGS. 7 to 9 will be described. The digital data G1 is subjected to compression processing in the same manner as the image data, and thereafter, an error correction code is added, and the digital data G1 enters the image data output unit 25. The serial communication interface unit 55 has already received the detection data transmission command. Image data output unit 2
Since the detection data input to 5 are output, the image data communication unit 59 of the fire detection device outputs the data of the fire detection device.

That is, a transmission command from the receiver to the serial communication interface section of each fire detection device, such as NO. 1 transmission, NO. 2 transmission, NO. Three
Send ..., NO. When the fire detection device receives the same transmission command as the previously given transmission command, the data of the fire detection device is transmitted through the image data communication unit 59 to the reception unit R respectively. Have been sent to.

In the receiving section R, the data of the fire detection device is sequentially taken in through the image data communication section 47, and this is the CP.
The memory is sequentially stored in the RAM 62 by the U 61. The data thus stored is examined to determine if a particular fire detection device has detected a flame, similar to the system shown in FIGS.

Here, when it is determined that the specific fire detection device detects flame, for example, when the fire detection device X1 detects flame, the television is detected through the serial communication interface circuit 65 to the fire detection device X1. A command is transmitted so as to transmit the image data obtained from the camera image output unit. Therefore, the fire detection device X1
Transmits an image output signal V1 obtained through the television camera image output unit 21 to the receiving unit R and is input to the image data communication unit 47 of the receiving unit R.

The transmission image data V3 from the image data communication section 47 enters the image data decompression section 42 and is decompressed to the original data, and then enters the deletion section 43 to complete the image data Y.
Returned to 3. The image data Y3 is displayed on the image data display unit 45 controlled by the image data control unit 44. Further, the image data Y3 can be displayed on the other display unit not shown here, for example, the display unit in the central control room or the like through the image data control unit 44. It is sufficient to judge whether it is a fire or a false alarm if the image data is transmitted and the display on the display unit is repeatedly updated once per second.

In a large tunnel with a tunnel length of 3 km or more, ITVs are installed every several hundred meters, so
If there is a fire alarm from the detector, the ITV installed in the vicinity will be moved from the central control room to check whether it is a fire or a malfunction, so there is no problem, but the following In small and medium tunnels, only the receiver is installed, and even if a detector reports a fire, there is no way to determine whether it is a real fire or a malfunction. Therefore, in such a case, the staff must rush to the scene to judge whether it is a fire or a false alarm, and take appropriate measures to extinguish the fire in the case of a fire and to prohibit traffic in the case of a false alarm. In any case, it is very important and can become a very big problem.

In the present system, the device for transmitting and receiving digital data between the local receiver and the central control room is already installed and operated, so that one TV or disaster detector or sensor is used for each disaster prevention. By installing a camera unit and adding a communication function capable of digitally transmitting between the detector or the sensor and the receiving unit, it is possible to make a system capable of monitoring the situation at the site. Therefore,
According to the present invention, such a problem can be solved as described above.

For image compression, for example, generally-used run length encoding may be used, data compression may be performed by run length encoding, and data may be combined by run length encoding. There are various other methods for encoding and decoding (compression, decompression), but these will not be described in detail here. Any of them may be logically created by using an existing IC, or can be easily realized by using a microcomputer.

When the image data transmission command is received, the television camera image output unit, the image compression unit, the error correction code addition unit, and the image data output unit are activated and the power is turned on. This has the advantage of saving power and prolonging their life.

[0053]

According to the present invention, when a signal from the sensor element for disaster prevention determines that a fire has occurred and / or a harmful gas has leaked, a television camera attached to the corresponding sensor element. Using the image output unit, you can immediately or automatically receive the image signal showing the situation in the vicinity at the receiving unit or the central control management room, so fires and gas leaks can be made without the personnel rushing to the site. It is possible to confirm the occurrence of the occurrence of the above, and it is possible to perform the subsequent treatment extremely accurately and promptly. Therefore, it is possible to provide a highly efficient and economical disaster detection device and disaster prevention system that is extremely reliable and requires low maintenance costs.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a disaster prevention system according to the present invention.

FIG. 2 is a block diagram showing the configuration of the flame detection device shown in FIG.

FIG. 3 is a block diagram showing a configuration of a receiving unit shown in FIG.

FIG. 4 is a system configuration diagram showing another embodiment of the disaster prevention system according to the present invention.

5 is a block diagram showing the configuration of the fire detection device shown in FIG.

6 is a block diagram showing a configuration of a receiving unit shown in FIG.

FIG. 7 is a system configuration diagram showing another embodiment of the disaster prevention system according to the present invention.

FIG. 8 is a block diagram showing a configuration of the fire detection device shown in FIG.

9 is a block diagram showing a configuration of a receiving unit shown in FIG.

[Explanation of symbols]

 1 Tunnel fire detection system 11 Infrared light receiving element 21 Television camera image output section P, Q, R reception section S1, S2, Sn Flame detection device W1, W2, Wn, X1, X2, Xn Fire detection device

Claims (4)

[Claims] 1. A sensor element for detecting occurrence of a predetermined physical phenomenon for disaster prevention in a disaster prevention detector used for disaster prevention such as fire occurrence detection or harmful gas leak detection, and the sensor. A disaster prevention detection device comprising: an image pickup means for taking an image of a state in the vicinity of an element. 2. The disaster prevention detection device according to claim 1, wherein a video output signal is output from the image pickup means when a predetermined output for disaster prevention is obtained from the sensor element. Disaster detection device. 3. A disaster prevention system which detects a fire occurrence or a leak of harmful gas in a predetermined area and sends the result to a monitoring center, wherein a predetermined physical phenomenon in the predetermined area is detected. A sensor element for detecting the occurrence, an image pickup means for picking up an image of the inside of the predetermined area, and a response signal from the image pickup means in response to a predetermined output for disaster prevention being obtained from the sensor element. Output control means for outputting a video output signal; transmission means for sending a detection signal based on the output of the sensor element and the video output signal to the monitoring center; and a front video output signal provided in the monitoring center. A disaster prevention system comprising an image display device which operates in response. 4. A disaster prevention system, which detects a fire occurrence or a leak of harmful gas in a predetermined area and sends the result to a monitoring center, wherein a predetermined physical phenomenon in the predetermined area is detected. A plurality of sensor elements for detecting the occurrence, a plurality of imaging means for imaging the situation in the predetermined area, when a predetermined output for disaster prevention is obtained from any of the sensor elements A disaster prevention system comprising alarm output means for giving an alarm output, and an image display device provided in the monitoring center and capable of monitoring a video output signal from any image pickup means of the image pickup means. .