Infrared temperature measurement system based on narrow closed space

Abstract

An infrared temperature measurement system based on a narrow closed space comprises a first front-end box, a second front-end box and a third front-end box, the first front-end box, the second front-end box and the third front-end box are all connected with an optical splitter, the optical splitter is sequentially connected with an optical fiber terminal, a switch and a background monitoring host, and the first front-end box is connected with a first card machine; the second front end box is connected with the second card machine; the third front end box is connected with a third card machine, a fourth card machine, a fifth card machine and a sixth card machine, and the third card machine, the fourth card machine, the fifth card machine and the sixth card machine are used for obtaining third temperature data of the transformer at different angles in the high-voltage power transformation cabinet in real time and transmitting the third temperature data to the background monitoring host. The positions and the number of the card machines can be set according to different frameworks, and the temperature state of target equipment can be monitored by the card machines in a narrow closed space.

Description

Technical Field

[0001] The utility model belongs to the technical field of infrared temperature measurement, and particularly relates to an infrared temperature measurement system based on a narrow and confined space. Background Art

[0002] As an advanced temperature monitoring technology, infrared thermal imaging technology is based on the principle of thermal radiation of objects. It captures and measures infrared radiation and converts these radiation signals into electrical signals to obtain the spatial distribution of the surface temperature of objects. In the field of power station temperature monitoring, infrared thermal imaging technology can greatly avoid electric shocks to workers through non-contact temperature measurement, and is relatively safe.

[0003] The Chinese patent application with publication number CN211602187U discloses an infrared temperature online monitoring system for substation equipment, including: front-end equipment, communication equipment, and back-end computer; the front-end equipment includes: multiple dual-channel all-weather monitoring heads, multiple dual-channel all-weather monitoring heads are arranged in the monitoring environment, temperature detection equipment is connected to the back-end computer, communication equipment is arranged on the front-end equipment, and the back-end computer is connected to the communication equipment and the front-end equipment. However, when the monitored object is in a closed and narrow space, it is easy to cause the monitoring device to be displaced and fall off, and even the problem of not being able to present clear imaging due to the short detection distance. Therefore, it is very necessary to provide an infrared temperature measurement system based on a narrow and confined space, which can realize the real-time temperature detection of the target instrument by the monitoring device in a closed and narrow space. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an infrared temperature measurement system based on a narrow and confined space. By setting different numbers of card machines in different narrow environmental conditions, the infrared temperature measurement system can set the position and number of card machines according to different architectures, thereby realizing the temperature status monitoring of the target device by the card machine in the narrow and confined space.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An infrared temperature measurement system based on a small and confined space includes a first front-end box, a second front-end box and a third front-end box, wherein the first front-end box, the second front-end box and the third front-end box are all connected to an optical splitter, and the optical splitter is connected to an optical fiber terminal, a switch and a background monitoring host in sequence, wherein:

[0007] The first front-end box is connected to the first card machine, and the first card machine is used to obtain the first temperature data of the wiring terminals and the control motor in the electrical brake switch room in real time, and transmit the first temperature data to the background monitoring host;

[0008] The second front-end box is connected to the second card machine, and the second card machine is used to obtain the second temperature data of the voltage transformer in the excitation PT cabinet in real time, and transmit the second temperature data to the background monitoring host;

[0009] The third front-end box is connected to the third card machine, the fourth card machine, the fifth card machine and the sixth card machine respectively. The third card machine, the fourth card machine, the fifth card machine and the sixth card machine are used to obtain the third temperature data of the transformer at different angles in the high-voltage substation in real time, and transmit the third temperature data to the background monitoring host.

[0010] Preferably, a hanging bracket is installed in the vertical direction of the crossbeam of the electric brake switch room, the first card camera is fixedly connected to the hanging bracket, and the shooting direction of the first card camera is perpendicular to the hanging bracket.

[0011] Preferably, the second card camera is attached to the inner side of the cabinet door of the excitation PT cabinet by magnetic attraction, and the shooting direction of the second card camera is perpendicular to the cabinet door of the excitation PT cabinet.

[0012] Preferably, the third card machine and the fourth card machine are attached to the inner side of the cabinet door of the high-voltage substation by magnetic attraction, and the shooting direction of the third card machine and the fourth card machine is the same as the cabinet door of the high-voltage substation. The fifth card machine and the sixth card machine are attached to the inner wall opposite to the cabinet door of the high-voltage substation by magnetic attraction, and the shooting direction of the fifth card machine and the sixth card machine is perpendicular to the inner wall of the high-voltage substation.

[0013] Preferably, the first card camera, the second card camera, the third card camera, the fourth card camera, the fifth card camera and the sixth card camera are all thermal imaging temperature measurement card cameras.

[0014] Preferably, the first card camera, the second card camera, the third card camera, the fourth card camera, the fifth card camera and the sixth card camera are all equipped with an infrared thermal imaging lens, a visible light imaging lens and a field of view lens.

[0015] Preferably, the field of view of the field of view lens is 90°, and the spatial resolution of the field of view lens is 5.71 mrad.

[0016] Preferably, the background monitoring host is used to remotely observe the temperature status of the terminal blocks, control motors, voltage transformers, and transformers.

[0017] The utility model can achieve the following beneficial effects:

[0018] The utility model arranges different numbers of card machines in the electrical brake switch room, the excitation PT cabinet and the high-voltage transformer cabinet respectively, so that the infrared temperature measurement system can set the position and number of card machines according to different architectures, thereby ensuring the imaging distance. It can effectively solve the problem that the thermal imager is difficult to detect the temperature of an object in a confined space, and realize the temperature status monitoring of the target equipment by the card machine in a narrow confined space. At the same time, according to the installation requirements under different existing environmental conditions, the network design presents a very regular system arrangement, that is, through the networking mode of the front-end box, splitter, optical fiber terminal, switch and background monitoring host, the online real-time monitoring demand for the temperature in the narrow space of the power plant is realized.

[0019] By improving the traditional binocular infrared thermal imaging technology and specially customizing a 90° wide field of view lens, accurate all-round monitoring of narrow and enclosed spaces can be achieved. The imaging mechanism under multiple lenses can ensure that the temperature distribution of the monitored target surface can be displayed more clearly at an extremely close distance. At the same time, the card machine is attached to the cabinet door by magnetic attraction, which can ensure that the card machine can be fastened inside the cabinet and in a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the framework of the infrared temperature measurement system of the utility model;

[0022] Figure 2 This is a schematic diagram of monitoring points for temperature measurement of the brake switch of the utility model;

[0023] Figure 3 This is a schematic diagram of monitoring points for the self-used electricity of the unit of the utility model;

[0024] Figure 4 The figure is a schematic diagram of monitoring points for temperature measurement of the excitation self-transformer of the utility model.

[0025] In the figure: 1-first card machine; 2-second card machine; 3-third card machine; 4-fourth card machine; 5-fifth card machine; 6-sixth card machine; 7-first front-end box; 8-second front-end box; 9-third front-end box; 10-splitter; 11-optical fiber terminal; 12-switch; 13-back-end monitoring host. DETAILED DESCRIPTION

[0026] The preferred solution is Figures 1 to 4As shown, an infrared temperature measurement system based on a small and enclosed space includes a first card machine 1, a second card machine 2, a third card machine 3, a fourth card machine 4, a fifth card machine 5, a sixth card machine 6, a first front-end box 7, a second front-end box 8, a third front-end box 9, an optical splitter 10, an optical fiber terminal 11, a switch 12 and a background monitoring host 13. The first front-end box 7, the second front-end box 8 and the third front-end box 9 are all connected to the optical splitter 10, and the optical splitter 10, the optical fiber terminal 11, the switch 12 and the background monitoring host 13 are connected in sequence, wherein:

[0027] In this embodiment, the first front-end box 7 is connected to the first card machine 1, and the first card machine 1 is used to obtain the first temperature data of the terminal and the control motor in the electrical brake switch room in real time, and transmit the first temperature data to the background monitoring host 13.

[0028] like Figure 2 As shown, a hanging bracket is installed in the vertical direction of the crossbeam of the electric brake switch room, the first card camera 1 is fixedly connected to the hanging bracket, and the shooting direction of the first card camera 1 is perpendicular to the hanging bracket. For example, if the monitoring object is the terminal block and the control motor, the card camera is planned to be hung at the crossbeam at a distance of 0.8m.

[0029] In this embodiment, the second front-end box 8 is connected to the second card machine 2 , and the second card machine 2 is used to obtain the second temperature data of the voltage transformer in the excitation PT cabinet in real time, and transmit the second temperature data to the background monitoring host 13 .

[0030] like Figure 3 As shown, the second card camera 2 is attached to the inner side of the door of the excitation PT cabinet by magnetic attraction, and the shooting direction of the second card camera 2 is perpendicular to the door of the excitation PT cabinet. For example, the dry-type transformer for the generator set is installed in the excitation PT cabinet, and the main monitoring object is the transformer body. It is planned to install the second card camera 2 on the inner side of the cabinet door using a strong magnetic adsorption backplane.

[0031] In this embodiment, the third front-end box 9 is respectively connected to the third card machine 3, the fourth card machine 4, the fifth card machine 5 and the sixth card machine 6. The third card machine 3, the fourth card machine 4, the fifth card machine 5 and the sixth card machine 6 are used to obtain the third temperature data of the transformer at different angles in the high-voltage substation in real time, and transmit the third temperature data to the background monitoring host 13.

[0032] like Figure 4As shown, the third card machine 3 and the fourth card machine 4 are attached to the inner side of the cabinet door of the high-voltage transformer cabinet by means of magnetic attraction, and the shooting direction of the third card machine 3 and the fourth card machine 4 is perpendicular to the cabinet door of the high-voltage transformer cabinet. The fifth card machine 5 and the sixth card machine 6 are attached to the inner wall opposite to the cabinet door of the high-voltage transformer cabinet by means of magnetic attraction, and the shooting direction of the fifth card machine 5 and the sixth card machine 6 is perpendicular to the inner wall of the high-voltage transformer cabinet. For example, the dry-type transformer for the generator set is installed in the high-voltage transformer cabinet, and the main monitoring object is the transformer body. It is planned to install the third card machine 3, the fourth card machine 4, the fifth card machine 5 and the sixth card machine 6 on the inner side of the cabinet door using a strong magnetic adsorption back plate.

[0033] The first card camera 1, the second card camera 2, the third card camera 3, the fourth card camera 4, the fifth card camera 5 and the sixth card camera 6 are all thermal imaging temperature measurement card cameras. The first card camera 1, the second card camera 2, the third card camera 3, the fourth card camera 4, the fifth card camera 5 and the sixth card camera 6 are all equipped with infrared thermal imaging lenses, visible light imaging lenses and field of view lenses. The field of view of the field of view lens is 90°, the spatial resolution of the field of view lens is 5.71mrad, and the imaging range of the field of view lens is about 1.5m×1m.

[0034] In this embodiment, the thermal imaging temperature measuring card machine adopts a new 256×192 uncooled vanadium oxide infrared detector, a customized 90° wide-angle lens for narrow spaces, and an IP66 protection level (high temperature resistance and strong anti-electromagnetic interference capability). Considering that the environmental monitoring distance is too short, the use of multiple wide-angle lenses can more carefully and flexibly detect the temperature distribution of objects in the confined space. The spatial resolution can reach 5.71mrad, which can achieve a multi-angle, high-dimensional imaging range in the case of close-range detection (when the monitoring distance is 1m, the imaging range is about 1.5m×1m). For special scenarios such as narrow and confined spaces, a magnetic mounting backplate is added to the installation method of the device, and in order to further avoid problems such as displacement and falling off of the equipment during use, the aluminum alloy backplate is installed using the gaps and fixed with screws.

[0035] By improving the traditional binocular infrared thermal imaging technology and specially customizing a 90° wide field of view lens, accurate monitoring of narrow and closed spaces can be achieved. The imaging mechanism under the multi-lens can ensure that the temperature distribution on the surface of the monitored target can be displayed more clearly at an extremely close distance. At the same time, the card machine is attached to the cabinet door by magnetic attraction, which can ensure that the card machine can be fastened in the cabinet and in a small space. According to the installation requirements under different existing environmental conditions, a very regular system arrangement is presented in the network design, and a unified magnetic installation method is adopted for confined spaces such as switch control cabinets. In a small space, the imaging distance is guaranteed according to different architectures, which solves the technical problems that thermal imagers are difficult to deeply detect the temperature of objects in a confined space and cannot cover all aspects, providing certain technical support for the construction of a three-dimensional temperature monitoring system for power stations.

[0036] Since closed and narrow spaces mostly require 1-2 cameras, if the monitoring locations are close to each other, multiple monitoring point cameras can be gathered in the same front-end box. The number of ONU interfaces built into the front-end box can be adjusted according to actual needs. The front-end box provides working power for the infrared temperature measurement equipment, that is, the first front-end box 7, the second front-end box 8 and the third front-end box 9 all provide working power for the thermal imaging temperature measurement card machine. The power supply method is POE (network cable). The signals of multiple front-end boxes are merged into an output optical signal through the ODB secondary splitter 10. The optical signal data of multiple ODB secondary splitters 10 can be received and processed through the OLT board. Finally, the first temperature data, the second temperature data and the third temperature data are aggregated through the switch 12 and input into the background monitoring host 13, and connected to the temperature measurement platform through the customized software and hardware platform.

[0037] The background monitoring host 13 is used to remotely observe the temperature status of the terminal block, control motor, voltage transformer and transformer. Among them, the background monitoring host 13 can be an infrared imaging analyzer or a host computer. The infrared imaging analyzer and the host computer can realize the temperature display, thermal imaging display and visible light video display of the infrared thermal imaging card machine. The thermal imaging temperature measurement card machine is equipped with a high-sensitivity infrared detector and a high-resolution visible light detector, which can perform all-weather real-time temperature monitoring of the slip ring and carbon brush in the slip ring chamber, detect the temperature changes of the slip ring and carbon brush, and realize accurate temperature measurement. When the temperature is abnormal, a sound alarm is issued to help users quickly locate the hidden danger point, reduce property losses, and reduce safety hazards. The thermal imaging information and temperature information of the thermal imaging temperature measurement card machine can be transmitted to the background monitoring host 13 through the switch 12 for display. The background monitoring host 13 supports image processing technologies such as dual-light fusion and picture-in-picture, realizes the fusion and superposition of thermal imaging and visible light images, and improves the recognition of image details.

[0038] By setting different numbers of card machines in the electrical brake switch room, the excitation PT cabinet and the high-voltage transformer cabinet, the infrared temperature measurement system can set the position and number of card machines according to different architectures, thereby ensuring the imaging distance of the card machine, which can effectively solve the problem that the thermal imager is difficult to detect the temperature of an object in a confined space, and realize the temperature status monitoring of the target equipment in a narrow space. At the same time, according to the installation requirements under different existing environmental conditions, a very regular system arrangement is presented in the network design, that is, through the networking mode of the front-end box, the splitter 10, the optical fiber terminal 11, the switch 12 and the background monitoring host 13, the online real-time monitoring requirements of the temperature of the slip ring room of the power plant are realized.

[0039] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An infrared temperature measurement system based on a small and confined space, characterized in that: The system comprises a first front-end box (7), a second front-end box (8) and a third front-end box (9), wherein the first front-end box (7), the second front-end box (8) and the third front-end box (9) are all connected to an optical splitter (10), and the optical splitter (10) is connected to an optical fiber terminal (11), a switch (12) and a background monitoring host (13) in sequence, wherein: The first front-end box (7) is connected to the first card machine (1), and the first card machine (1) is used to obtain first temperature data of the wiring terminals and the control motor in the electrical brake switch room in real time, and transmit the first temperature data to the background monitoring host (13); The second front-end box (8) is connected to the second card machine (2), and the second card machine (2) is used to obtain the second temperature data of the voltage transformer in the excitation PT cabinet in real time, and transmit the second temperature data to the background monitoring host (13); The third front-end box (9) is connected to the third card machine (3), the fourth card machine (4), the fifth card machine (5) and the sixth card machine (6) respectively. The third card machine (3), the fourth card machine (4), the fifth card machine (5) and the sixth card machine (6) are used to obtain third temperature data of the transformer at different angles in the high-voltage transformer cabinet in real time, and transmit the third temperature data to the background monitoring host (13).

2. The infrared temperature measurement system based on a narrow and confined space according to claim 1 is characterized in that: A hanging bracket is installed in the vertical direction of the crossbeam of the electric brake switch room, the first card camera (1) is fixedly connected to the hanging bracket, and the shooting direction of the first card camera (1) is perpendicular to the hanging bracket.

3. The infrared temperature measurement system based on a narrow and confined space according to claim 1 is characterized in that: The second card machine (2) is attached to the inner side of the cabinet door of the excitation PT cabinet by means of magnetic attraction, and the shooting direction of the second card machine (2) is perpendicular to the cabinet door of the excitation PT cabinet.

4. The infrared temperature measurement system based on a narrow and confined space according to claim 1 is characterized in that: The third card machine (3) and the fourth card machine (4) are attached to the inner side of the cabinet door of the high-voltage transformer cabinet by means of magnetic attraction, and the shooting directions of the third card machine (3) and the fourth card machine (4) are aligned with the cabinet door of the high-voltage transformer cabinet. The fifth card machine (5) and the sixth card machine (6) are attached to the inner wall opposite to the cabinet door of the high-voltage transformer cabinet by means of magnetic attraction, and the shooting directions of the fifth card machine (5) and the sixth card machine (6) are perpendicular to the inner wall of the high-voltage transformer cabinet.

5. The infrared temperature measurement system based on a narrow and confined space according to claim 1 is characterized in that: The first card machine (1), the second card machine (2), the third card machine (3), the fourth card machine (4), the fifth card machine (5) and the sixth card machine (6) are all thermal imaging temperature measurement card machines.

6. The infrared temperature measurement system based on a narrow and confined space according to claim 1 is characterized in that: The first card machine (1), the second card machine (2), the third card machine (3), the fourth card machine (4), the fifth card machine (5) and the sixth card machine (6) are all equipped with an infrared thermal imaging lens, a visible light imaging lens and a field of view lens.

7. The infrared temperature measurement system based on a narrow and confined space according to claim 1 is characterized in that: The field of view of the field lens is 90°, and the spatial resolution of the field lens is 5.71 mrad.

8. The infrared temperature measurement system based on a small and confined space according to claim 1 is characterized in that: The background monitoring host is used to remotely observe the temperature status of the terminal blocks, control motors, voltage transformers, and transformers.

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