CN216697466U - A fire location alarm device based on temperature measuring fiber - Google Patents

Abstract

The utility model discloses a fire positioning alarm device based on temperature measuring optical fibers, relates to the field of fire positioning alarm, and solves the problem that the existing fire positioning alarm device is easily influenced by dust in a closed environment so as to generate false alarm, wherein the technical scheme is as follows: the utility model provides a fire location alarm device based on temperature measurement optic fibre, its characterized in that, including optic fibre, optic fibre temperature measurement changer, supervisory equipment and the host computer that is used for measuring the temperature, optic fibre with the fiber communication channel of optic fibre temperature measurement changer connects, the wired transmission interface of optic fibre temperature measurement changer is used for connecting the host computer, the host computer with supervisory equipment connects. The utility model is based on optical fiber temperature measurement, and can reduce the area range of abnormal temperature, namely fire occurrence and need confirmation through optical fiber chessboard type arrangement, so that the place where the fire occurs can be found more quickly and accurately, and false alarm is avoided to a certain extent.

Description

A fire location alarm device based on temperature measuring fiber

technical field

The utility model relates to the field of fire positioning and alarming, in particular to a fire positioning and alarming device based on a temperature measuring optical fiber.

Background technique

With the rapid development of the civil aviation transportation industry and the container freight industry, incidents such as aircraft fire alarms and express transportation fires have also occurred frequently in recent years. At present, a large number of aircraft cargo compartments and warehouses use smoke detectors to detect fires, and there are two common smoke detection methods: photoelectric and ionized. But both methods have the problem of being easily affected by dust in the environment, thus generating false alarms.

The currently used fire detectors have the following disadvantages: they can only detect a single parameter, the false alarm rate is high, and they are not suitable for confined spaces such as aircraft cargo holds, truck containers, etc., which are prone to dust, and cannot provide visual information. , once there is a fire alarm signal, it is difficult for the pilot and crew to approach the target area of the cabin, and it is not convenient for the driver of the truck to find out in the high-speed environment, lack of intuitive image information, and it is impossible to judge whether it is a false alarm. Infrared thermal imaging instruments are expensive, and the monitoring area is small when facing a large space, and the economy is not high. However, ordinary cameras cannot respond accurately and quickly to fire detection. When the flames are seen, the best time to extinguish the fire has been missed. Although the existing infrared thermal imaging camera can be rotated, it is aimless or controlled by humans, which greatly affects the accuracy and speed of fire monitoring. If it is launched on a large scale, it will improve the response speed and accuracy of fire, but the cost is unacceptable.

Utility model content

The purpose of the utility model is to provide a fire positioning alarm device based on temperature measuring optical fiber, which solves the problem that the existing fire alarm can only alarm after fire or sparks, and does not have the effect of preventing fire in advance.

The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions:

A fire location alarm device based on temperature measurement optical fiber, comprising an optical fiber for measuring temperature, an optical fiber temperature measurement transmitter, a monitoring device and a host computer, the optical fiber is connected with the optical fiber communication channel of the optical fiber temperature measurement transmitter , the wired transmission interface of the optical fiber temperature measurement transmitter is used to connect the upper computer, and the upper computer is connected with the monitoring device.

Compared with the prior art, the present application measures the temperature of some sealed environments through an optical fiber that can realize temperature measurement, and the optical signal measured by the optical fiber is sent to the optical fiber temperature measurement transmitter through the optical fiber communication channel, and the optical fiber temperature measurement is carried out. The transmitter is mainly based on distributed optical fiber temperature measurement technology, which is mainly based on Raman scattering. After modulation, the scattered light enters the wavelength division multiplexer, and Stokes light and anti-Stokes light are obtained. Stokes light, according to the characteristics of Stokes light and anti-Stokes light, the quantitative relationship between light intensity ratio and temperature will be obtained. On this basis, combined with the internal reference temperature of the temperature measurement system, and the corresponding existing available The realized correction algorithm can obtain the actual temperature information, that is, a digital signal. The generated digital signal is sent to the host computer for comparison and judgment. If the judgment result exceeds the set temperature threshold, it can be displayed by the host computer, and can be displayed on the host computer. Observe the area with abnormal temperature through monitoring equipment; that is, the optical fiber transmitter converts the analog signal of the temperature detected by the optical fiber into a digital signal, and the host computer compares and identifies the temperature, which can be a comparator with a comparison function. When the temperature exceeds When the temperature threshold set by the comparator is lower than the fire point of the goods in the warehouse or container, the alarm will be issued before the fire point is reached, which can give the staff a good reaction time, so as to achieve the prevention of fire in advance. effect.

Further, the optical fiber temperature measurement transmitter includes a first optical fiber temperature measurement transmitter and a second optical fiber temperature measurement transmitter, and the first optical fiber temperature measurement transmitter and the second optical fiber temperature measurement transmitter are Each optical fiber communication channel is connected with at least two optical fibers.

Further, the optical fibers connected to the first optical fiber temperature measurement transmitter and the second optical fiber temperature measurement transmitter are arranged in a staggered manner.

Further, the device further includes a power supply module. The power supply module is electrically connected with the optical fiber temperature measurement transmitter, the monitoring device and the host computer.

Further, the monitoring device is an infrared thermal imaging camera capable of 360-degree rotation.

Further, the wired transmission interface of the optical fiber temperature measurement transmitter is a USB interface.

Further, the optical fiber temperature measurement transmitter is a temperature sensing optical cable distributed temperature measurement host.

Further, the device further includes an acousto-optic alarm, and the acousto-optic alarm is connected to the output port of the upper computer.

Further, the device further includes a dust detector electrically connected with the upper machine for detecting the dust concentration.

Further, the model of the dust detector is Haijing HJ-CW-HPC300 handheld laser dust detector.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model is based on optical fiber temperature measurement, and through the optical fiber checkerboard arrangement, the abnormal temperature can be reduced, that is, the area range when a fire needs to be confirmed can be narrowed, and the location of the fire can be found more quickly and accurately. Infrared cameras are expensive. Through temperature measurement fiber positioning and existing software, they can automatically adjust the monitoring range, which can reduce the number of use, improve economy, and improve accuracy. Through the combined use of optical fiber and infrared thermal imaging technology, it can not only play the role of secondary confirmation, but also intuitively let the monitoring personnel understand the fire situation. The application can be applied to confined spaces such as aircraft cargo holds, train containers and express transport cargo boxes, and can also be applied to places such as terminals, library management and archives.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the present application, and do not constitute a limitation to the embodiments of the present invention. In the attached image:

1 is a schematic structural diagram provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of the staggered distribution of optical fibers according to an embodiment of the present invention.

The marks in the attached drawings and the corresponding parts names:

1. Monitoring equipment; 2. Host computer; 3. Optical fiber temperature transmitter; 4. Optical fiber communication channel; 5. Optical fiber; 6. Power module; 7. Sound and light alarm; 8. Dust detector.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be described in further detail below in conjunction with the embodiments and the accompanying drawings. The invention is not intended to limit the present invention.

It should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

Example:

As shown in FIG. 1 , an embodiment of the present application provides a fire location alarm device based on a temperature measurement optical fiber, including an optical fiber 5 for measuring temperature, an optical fiber temperature measurement transmitter 3, a camera and a host computer 2, and an optical fiber 5 and an optical fiber. The optical fiber 5 communication channel 4 of the temperature measuring transmitter 3 is connected, and the wired transmission interface of the optical fiber temperature measuring transmitter 3 is used to connect the upper computer 2, and the upper computer 2 is connected with the camera.

Specifically, the optical fiber 5 has the advantages of good insulation, resistance to high voltage, corrosion resistance, resistance to high voltage and strong electromagnetic interference, long life, high precision, and wider application environment. It can be used to detect the internal temperature of oil depot, aircraft cargo hold, passenger cabin and internal circuit temperature, large-scale monitoring of high-speed rail tunnels, internal monitoring of truck containers, etc. Because a fiber optic temperature measuring transmitter 3 (also called a fiber optic temperature measuring demodulator) has a plurality of fiber 5 communication channels 4 . Therefore, this system can be used to monitor multiple bodies at the same time. For example, the optical fiber 5 is penetrated into the oil tank storing fuel oil or some other high-risk environments with very strict temperature control. When the optical fiber 5 shows that the temperature inside the oil tank is abnormal, The optical fiber temperature measuring transmitter 3 transmits the collected signal to the host computer 2, firstly marks the temperature measuring optical fiber 5 and presets the address (such as optical fiber 5A, B, C, D) and then arranges it. When a fire occurs , when the temperature is abnormal, the fiber 5 transmits the data back, and finds that a certain section of the A, B, C, D fiber 5 has abnormal temperature. According to the preset address, the information is identified on the host computer 2, and the temperature abnormal point is determined, and then the host computer The machine 2 controls the monitoring equipment 1 (camera, etc.) to automatically and quickly make targeted monitoring under the optical fiber 5 temperature measurement and positioning system. The infrared thermal imaging equipment around the oil tank is automatically aligned to monitor the surface temperature of the tank, which can not only reduce the number of infrared thermal imaging equipment, but also expand the monitoring area of each camera, and make an oil tank in different Angles are monitored, improving accuracy and economy.

The temperature of a sealed environment is measured through the optical fiber 5 that can realize temperature measurement, and the optical signal measured by the optical fiber 5 is sent to the optical fiber temperature measurement transmitter 3 through the optical fiber 5 communication channel 4. The optical fiber temperature measurement transmitter 3 mainly uses Distributed optical fiber temperature measurement technology is the principle, which is mainly based on Raman scattering. After modulation, the scattered light enters the wavelength division multiplexer, and Stokes light and anti-Stokes light are obtained. According to the characteristics of Stokes light and anti-Stokes light, the quantitative relationship between light intensity ratio and temperature will be obtained. On this basis, combined with the internal reference temperature of the temperature measurement system and the corresponding correction algorithm, the actual temperature can be obtained. The information is a digital signal. The generated digital signal is sent to the host computer 2 for comparison and judgment. If the judgment result exceeds the set temperature threshold, it can be displayed by the host computer 2, and the fire situation in the area can be observed through the camera. .

In yet another embodiment of the embodiment of the present application, the optical fiber temperature measurement transmitter 3 includes a first optical fiber temperature measurement transmitter and a second optical fiber temperature measurement transmitter, and the first optical fiber temperature measurement transmitter and the second optical fiber temperature measurement transmitter At least two optical fibers 5 are connected to the communication channels 4 of the optical fibers 5 of the temperature transmitter.

Specifically, by installing two optical fiber temperature transmitters 3 vertically, a checkerboard-type optical fiber 5 layout can be constructed through the cross-connection of optical fibers 5, and the optical fiber 5 temperature detection technology can be applied to aircraft cargo compartments, containers and larger spaces. In terms of thermal safety management and monitoring, through the reasonable arrangement of multiple channels (such as a checkerboard), the arrangement and monitoring can be carried out in the airtight aircraft cargo hold, container and large space, and the fire source can be accurately located, effectively solving the current inability to accurately and quickly. The technical problem of finding the fire source is solved, which reduces the difficulty of checking a large area, and realizes modularized and regionalized accurate measurement and precise positioning.

In yet another embodiment of the embodiment of the present application, as shown in FIG. 1 , the optical fibers 5 connected to the first optical fiber temperature measurement transmitter and the second optical fiber temperature measurement transmitter are arranged in a staggered manner.

Specifically, as shown in FIG. 1 , the optical fibers 5 are arranged in a checkerboard style, so that the optical fibers 5 can reasonably cover the entire monitoring space, which facilitates the management and control of some neatly placed places, such as places where oil or cargo boxes are stored , the placement of the cargo box or the oil tank is standardized, then through the crossed checkerboard arrangement, the optical signal transmitted back by the fiber 5 can better locate the position of abnormal temperature, so the checkerboard arrangement of the fiber 5 is applied: According to the different applications of the optical fiber temperature measurement transmitter 3, the area area where the optical fiber 5 can accurately monitor the temperature is measured in advance, such as the point temperature measurement commonly used in the prior art (with the monitoring point as the center of the circle, the radius of the temperature that can be sensed Draw a circle), then the internal enclosed range can be accurately monitored through the four monitoring points of the enclosed graph intersected by horizontal and vertical lines.

In another embodiment of the embodiment of the present application, the device further includes a power supply module 6 , and the power supply module 6 is electrically connected to the optical fiber temperature measurement transmitter 3 , the camera and the upper computer 2 .

Specifically, the power supply module 6 is used to supply power to the equipment that requires electric energy, and a battery, a storage battery, etc. can be selected for power supply, and of course, an external 220V voltage can be used for power supply.

In yet another embodiment of the embodiments of the present application, the monitoring device 1 is an infrared thermal imaging camera that can rotate 360 degrees.

Specifically, a freely rotatable infrared thermal imaging camera is installed at a suitable position, and is connected to the display screen and other instruments in the monitoring room through wires and power components. The specific location of the abnormal temperature can be displayed, and the information transmitted by the optical fiber 5 to locate the abnormal temperature is transmitted to the infrared thermal imaging camera control device through the software on the computer or the Raspberry Pi, so that it automatically rotates and focuses on the abnormal temperature. Infrared thermal imaging is passive imaging, without external light sources such as sunlight and lights. It can be used for monitoring in tunnels, nighttime, closed spaces and other environments. Using the temperature difference imaging between the target and the surrounding environment, the contrast is high, the action distance is long, the fire situation can be accurately and intuitively reflected, and the real-time temperature within the monitoring range can be displayed through its own characteristics, which can play a secondary confirmation role. The image display and temperature display can help the monitoring personnel to intuitively recognize the degree of fire danger, which effectively solves the technical problem that it is impossible to observe the internal fire situation in a closed and dark environment such as aircraft cargo holds or containers. Help the person in charge to respond quickly and take appropriate solutions. According to its technical characteristics of temperature sensitivity, passive imaging, all-weather work, fast response, no disturbance to target temperature, long-distance or difficult-to-reach target temperature measurement, intuitive and visible temperature distribution, etc. The upper computer 2 automatically controls the direction of its rotation, so that it can monitor the position of abnormal temperature in a targeted manner, reducing the number of equipment required, improving the economy, and being able to undertake the task of large-area monitoring in pairs. For example, the temperature can be monitored in a large-scale monitoring environment such as tunnels and oil depots, and real-time pictures can be transmitted. It solves the technical problems of high cost of large-scale use of infrared thermal imaging and other equipment, resulting in waste of resources and no purpose.

In another embodiment of the embodiment of the present application, the wired transmission interface of the optical fiber temperature measurement transmitter 3 is a USB interface.

Specifically, the transmission of digital signals is realized through the interface, which is processed by the upper computer 2 .

In yet another embodiment of the embodiment of the present application, the optical fiber temperature measurement transmitter 3 is a temperature sensing optical cable distributed temperature measurement host.

Specifically, the model of the temperature sensing optical cable distributed temperature measurement host can be DTS-PTCK-1040, which is a distributed temperature detection system based on the Raman backscattering principle and optical time domain reflection technology. Strong reliability, passive intrinsic safety, anti-electromagnetic interference, anti-corrosion, good temperature resistance, long transmission distance and so on. Real-time temperature detection in a large range and long distance is realized, which has the incomparable advantages of traditional temperature sensors. The products are mainly used in the fields that require continuous real-time online monitoring of temperature.

In another embodiment of the embodiment of the present application, the device further includes an acousto-optic alarm device 7 , and the acousto-optic alarm device 7 is connected to the output port of the upper computer 2 .

Specifically, here is mainly a sound and light alarm prompt. You can choose a police alarm or some with the same alarm, because after all, there are certain objective problems with the on-duty personnel, so when the temperature is abnormal, the sound and light will start immediately. Alarm, this can also play a certain warning role.

In yet another embodiment of the embodiment of the present application, as shown in FIG. 1 , the device further includes a dust detector 8 electrically connected to the upper computer for detecting the dust concentration.

Specifically, the detection device of the present application can also be applied to some places with high requirements for dust concentration, such as flour storage warehouses, etc. The dust detector 8 and the monitoring equipment 1 are installed on the wall of the flour warehouse, and the optical fiber detector is installed on the wall of the flour warehouse. The temperature transmitter 3 is installed on the ground of the flour warehouse in a reasonable arrangement (similar to a checkerboard arrangement) through the optical fiber 5 communication channel 4 and the optical fiber 5. When an abnormal temperature is detected, the display screen will display the specific temperature abnormality location. position, and the information transmitted by the optical fiber 5 to locate the abnormal temperature point is automatically transmitted to the infrared thermal imaging camera control device through the software, so that it automatically rotates and focuses on the abnormal temperature point. In this way, under the dual monitoring of dust concentration and temperature, the occurrence of fire can be avoided to a great extent.

In another embodiment of the embodiment of the present application, the model of the dust detector 8 is Haijing HJ-CW-HPC300 handheld laser dust detector.

Specifically, the Haijing HJ-CW-HPC300 handheld laser dust detector is relatively cheap and has excellent performance. In addition, it cooperates with optical fiber 5 for temperature detection, and the overall safety protection can be guaranteed. Therefore, for the detector, the In other words, there is no need for too expensive equipment, which will increase the cost of use.

To sum up, the present application can be applied to aircraft cargo warehouses. The power supply module 6 supplies power to the optical fiber temperature measurement transmitter 3, the host computer 2 and the monitoring device 1. The optical fiber temperature measurement transmitter 3 communicates through the optical fiber 5 and the communication channel 4. The optical fiber 5 is connected to the interior of the warehouse in a reasonable arrangement (similar to a checkerboard arrangement). When abnormal temperature is detected, the display screen will display the specific location of the abnormal temperature, and the information transmitted by the optical fiber 5 will be located through the software. The abnormal point is automatically transmitted to the infrared thermal imaging camera control device, so that it automatically rotates and focuses on the abnormal temperature location. Solve the high false alarm rate of fire alarm in the aircraft cargo compartment, and carry out fire alarm monitoring in the cargo compartment. Infrared thermal imaging equipment can provide real-time images to the captain and crew, and focus on whether there is an abnormal temperature in the monitoring area according to its characteristics. The optical fiber 5 can detect temperature and locate the effect through reasonable arrangement. When abnormal temperature is detected, an alarm can be issued to notify the captain and the crew. Spatial positioning can help thermal imaging equipment to automatically adjust the viewing angle or help relevant personnel to manually adjust the monitoring area of the equipment for secondary confirmation of fire alarms. Reduce the false alarm rate, reduce the economic loss and social impact caused by false alarms.

It can also be used in the container freight industry. In many cases of fire or fire alarm, it is impossible to allow the driver and other responsible personnel to confirm in time. One is due to its airtightness, and the other is restrictions in high-speed transportation environments. . In this case, even if there is a monitoring device 1, it is difficult for the driver to quickly and easily understand the fire situation (for example, the monitoring device 1 is not aimed at the fire source, or the camera needs to be manually rotated, etc.), then the optical fiber in the present application 5. The fire can be located, the infrared thermal imaging equipment can be automatically aligned with the area with abnormal temperature, and the positioning screen can be directly displayed to the relevant responsible personnel. It is more convenient to confirm the fire, which is convenient to control it in the early stage of the fire and reduces the economic Loss and Personal Threats.

It can also be applied to some places with high requirements for dust concentration detection, such as flour storage warehouses, flour production plants, cement storage warehouses and/or cement production plants, etc.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention The protection scope of the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims (10)

1. a fire locating alarm device based on temperature measurement optical fiber, is characterized in that, comprises the optical fiber (5) for measuring temperature, the optical fiber temperature measurement transmitter (3), monitoring equipment (1) and the host computer (2) , the optical fiber (5) is connected with the optical fiber (5) communication channel (4) of the optical fiber temperature measurement transmitter (3), and the wired transmission interface of the optical fiber temperature measurement transmitter (3) is used to connect all The upper computer (2) is connected with the monitoring device (1). 2. A kind of fire locating alarm device based on temperature measuring optical fiber according to claim 1, is characterized in that, described optical fiber temperature measuring transmitter (3) comprises the first optical fiber temperature measuring transmitter and the second optical fiber measuring transducer In the temperature transmitter, at least two optical fibers (5) are connected to the optical fiber communication channels (4) of the first optical fiber temperature measurement transmitter and the second optical fiber temperature measurement transmitter. 3 . The fire location alarm device based on temperature measuring optical fiber according to claim 2 , wherein the first optical fiber temperature measuring transmitter and the second optical fiber temperature measuring The optical fibers (5) are arranged in a staggered manner. 4. A fire location alarm device based on temperature measurement optical fiber according to claim 1, characterized in that the device further comprises a power supply module (6), the power supply module (6) and the optical fiber temperature measurement transmission The device (3), the monitoring device (1) and the upper computer (2) are electrically connected. 5 . The fire location alarm device based on temperature measuring fiber according to claim 1 , wherein the monitoring device ( 1 ) is an infrared thermal imaging camera capable of 360-degree rotation. 6 . 6 . The fire location alarm device based on temperature measurement optical fiber according to claim 1 , wherein the wired transmission interface of the optical fiber temperature measurement transmitter ( 3 ) is a USB interface. 7 . 7 . The fire location alarm device based on temperature measuring optical fiber according to claim 1 , wherein the optical fiber temperature measuring transmitter ( 3 ) is a temperature sensing optical cable distributed temperature measuring host. 8 . 8. A fire location alarm device based on temperature measuring optical fiber according to claim 1, characterized in that, the device further comprises an acousto-optic alarm (7), the acousto-optic alarm (7) and the The output port of the upper computer (2) is connected. 9. A fire location alarm device based on temperature measuring optical fiber according to claim 1, characterized in that, the device further comprises a dust detector (8) electrically connected with the upper computer for detecting dust concentration . 10 . The fire location alarm device based on temperature measuring fiber according to claim 9 , wherein the dust detector ( 8 ) is a model of Haijing HJ-CW-HPC300 handheld laser dust detector. 11 .

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