CN210293248U - Cable hot spot multi-professional sharing monitoring device based on single-mode optical cable - Google Patents
Cable hot spot multi-professional sharing monitoring device based on single-mode optical cable Download PDFInfo
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- CN210293248U CN210293248U CN201921031617.4U CN201921031617U CN210293248U CN 210293248 U CN210293248 U CN 210293248U CN 201921031617 U CN201921031617 U CN 201921031617U CN 210293248 U CN210293248 U CN 210293248U
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Abstract
The utility model discloses a cable hot spot multi-professional shared monitoring device based on single mode optical cable, which comprises a laser light source, a driving circuit, a wavelength division multiplexing module, a photoelectric detector, application software and a signal acquisition and control circuit; the laser light source is connected with the driving circuit and the wavelength division multiplexing module, the wavelength division multiplexing module is connected with the photoelectric detector, the driving circuit and the photoelectric detector are both connected with the signal acquisition and control circuit, and the signal acquisition and control circuit is connected with application software; the wavelength division multiplexing module is connected with the single-mode sensing optical fiber. The utility model discloses can obtain the temperature information of any point along the line of optic fibre, have that distributed monitoring, anti-electromagnetic interference performance are strong, anticorrosive, advantage such as high temperature resistant.
Description
Technical Field
The utility model relates to an optic fibre temperature measurement technical field, in particular to cable hot spot multi-specialty sharing monitoring devices based on single mode optical cable.
Background
The cable is important energy transmission equipment in various industrial production and civil industries such as electric power, steel, petrifaction, transportation and the like, the safe operation of the cable is a very important problem in various industries, and how to prevent the cable fire is more important. The optical fiber temperature sensor is a new technology in temperature measurement technology and is one of the most applied sensors in industry. The advent of distributed fiber optic temperature sensors has greatly reduced the cost of obtaining a unit amount of information, which is undoubtedly a revolution for electrical signal based temperature sensors and point fiber grating temperature sensors. The distributed optical fiber temperature sensing technology is a novel feasible means for measuring and controlling temperature fields in severe environments such as strong electromagnetic fields, high voltage and large current, inflammability and explosiveness, complex geometric spaces and the like by utilizing optical fibers to measure the temperature field distribution condition of continuous spaces which run for dozens of kilometers along the optical fibers. Therefore, the distributed optical fiber temperature sensor receives wide attention on the characteristics of the distributed optical fiber temperature sensor, and the research on the distributed optical fiber temperature sensing system has important theoretical significance and application value.
Distributed Temperature Sensing (DTS) is the most advanced Temperature measurement technology in the world. The DTS distributed optical fiber temperature sensing is completely different from the traditional temperature sensing system based on electric signals, and a new stage is provided from the difficulty of the measurement technology, the content and index of the measured temperature and the occasion and range of the measurement. The distributed optical fiber temperature sensor system can measure and display the temperature values of all points on the optical fiber in the form of continuous functions of distances on the whole continuous optical fiber. The technology can measure the temperature of a distance of 10km to 30km by only one optical fiber. The engineering application experience at home and abroad shows that the distributed optical fiber temperature sensing system is very effective monitoring equipment for the temperature monitoring of the power system.
In the prior art, in order to solve the problems of false alarm and missed alarm caused by the conventional monitoring, a set of reliable and high-performance automatic system is urgently needed to effectively monitor and alarm the temperature of the power equipment in real time so as to take preventive measures in time and avoid fire and power failure accidents.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a cable hot spot many specialties sharing monitoring devices based on single mode optical cable.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a cable hot spot multi-professional shared monitoring device based on a single-mode optical cable comprises a laser light source, a driving circuit, a wavelength division multiplexing module, a photoelectric detector, application software and a signal acquisition and control circuit;
the laser light source is connected with the driving circuit and the wavelength division multiplexing module, the wavelength division multiplexing module is connected with the photoelectric detector, the driving circuit and the photoelectric detector are both connected with the signal acquisition and control circuit, and the signal acquisition and control circuit is connected with the application software; the wavelength division multiplexing module is connected with a single-mode sensing optical fiber;
when the wavelength division multiplexing laser is used, the laser light source sends a pulse laser signal to the wavelength division multiplexing module and simultaneously triggers the driving circuit, and the driving circuit triggers the signal acquisition and control circuit to start execution; the pulse laser signals are transmitted into the single-mode sensing optical fiber through the wavelength division multiplexing module, backward Raman scattering signals are generated in the single-mode sensing optical fiber and fed back to the wavelength division multiplexing module, the backward Raman scattering signals are sent to the photoelectric detector by the wavelength division multiplexing module, the photoelectric detector amplifies the backward Raman scattering signals and sends the amplified backward Raman scattering signals to the signal acquisition and control circuit, the signal acquisition and control circuit converts the backward Raman scattering signals into digital signals and sends the digital signals to the application software, and the application software processes the backward Raman scattering optical fiber temperature distribution along the optical fiber by utilizing a Raman scattering light time domain reflection technology.
Further, the single-mode sensing fiber is any single-mode fiber in a communication optical cable.
The beneficial effects of the utility model reside in that:
1. distributed monitoring: temperature information of any point along the optical fiber can be obtained;
2. the cable is safe and reliable, and has strong radiation resistance and electromagnetic interference resistance, corrosion resistance and high temperature resistance;
3. the detection temperature dynamic range can be measured to reach more than 300 ℃ by matching with a high-temperature-resistant optical cable;
4. the testing distance is long, and the single-mode temperature measurement length can reach 30 km;
5. the accuracy is high, the positioning accuracy of the sensor can reach 1m, and the temperature measurement accuracy can reach +/-1 ℃;
6. long-term stability, long service life, the service life can reach more than 25 years;
7. the fire alarm system can alarm in real time through RS485/232 or Ethernet interface.
8. The system is not limited to monitoring the hot spot of the cable, and can develop the functions of monitoring the vibration of the cable based on the optical cable and the temperature, tension and ice coating condition of the cable based on the optical cable based on the characteristics of the optical fiber.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 10. a laser light source; 20. a drive circuit; 30. a wavelength division multiplexing module; 40. a photodetector; 50. application software; 60. a signal acquisition and control circuit; 70. a single mode sensing fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
A cable hot spot multi-professional shared monitoring device based on a single mode optical cable comprises a laser light source 10, a driving circuit 20, a wavelength division multiplexing module 30, a photoelectric detector 40, application software 50 and a signal acquisition and control circuit 60;
the laser light source 10 is connected with the driving circuit 20 and the wavelength division multiplexing module 30, the wavelength division multiplexing module 30 is connected with the photoelectric detector 40, the driving circuit 20 and the photoelectric detector 40 are both connected with the signal acquisition and control circuit 60, and the signal acquisition and control circuit 60 is connected with the application software 50; the wavelength division multiplexing module 30 is connected with a single-mode sensing fiber 70;
when the pulse laser is used, the laser light source 10 sends a pulse laser signal to the wavelength division multiplexing module 30, and simultaneously triggers the driving circuit 20 by sending a synchronous trigger signal to the driving circuit 20, and the triggered driving circuit 20 triggers the signal acquisition and control circuit 60 to start executing; pulse laser signals are transmitted into the single-mode sensing fiber 70 through the wavelength division multiplexing module 30, backward Raman scattering signals are generated in the single-mode sensing fiber 70 and fed back to the wavelength division multiplexing module 30, the wavelength division multiplexing module 30 sends the backward Raman scattering signals to the photoelectric detector 40, the photoelectric detector 40 amplifies the backward Raman scattering signals and sends the amplified backward Raman scattering signals to the signal acquisition and control circuit 60, the signal acquisition and control circuit 60 converts the backward Raman scattering signals into digital signals and sends the digital signals to the application software 50, and the application software 50 processes the temperature distribution along the temperature measuring fiber by utilizing a Raman scattering time domain reflection technology.
The single-mode sensing fiber 70 is any single-mode fiber in the communication cable. The pulse laser signal is conducted inside the single-mode sensing fiber 70, due to the characteristics of anti-stokes light intensity and stokes light intensity, a backward raman scattering signal with temperature information can be reflected by the single-mode sensing fiber 70 when being heated, the backward raman scattering signal is transmitted into the photoelectric detector 40 through the wavelength division multiplexing module 30, the photoelectric detector 40 amplifies the backward raman scattering signal, the amplified backward raman scattering signal is sent to the signal acquisition and control circuit 60, the signal acquisition and control circuit 60 converts the backward raman scattering signal into a digital signal capable of reflecting real-time temperature information and sends the digital signal to the application software 50, and the application software 50 utilizes a raman scattering optical time domain reflection technology, so that the temperature distribution along the measured optical fiber is obtained. Additionally, the utility model discloses still can expand out the external damage vibration monitoring function of preventing of cable based on the optical cable and based on the cable of optical cable functions such as monitoring of the condition such as temperature, tension and icing based on the characteristic of optic fibre.
The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (2)
1. The utility model provides a many specialty of cable hot spot share monitoring devices based on single mode optical cable which characterized in that: the device comprises a laser light source (10), a driving circuit (20), a wavelength division multiplexing module (30), a photoelectric detector (40), application software (50) and a signal acquisition and control circuit (60);
the laser light source (10) is connected with the driving circuit (20) and the wavelength division multiplexing module (30), the wavelength division multiplexing module (30) is connected with the photoelectric detector (40), the driving circuit (20) and the photoelectric detector (40) are both connected with the signal acquisition and control circuit (60), and the signal acquisition and control circuit (60) is connected with the application software (50); the wavelength division multiplexing module (30) is connected with a single-mode sensing optical fiber (70);
when the wavelength division multiplexing laser is used, the laser light source (10) sends a pulse laser signal to the wavelength division multiplexing module (30), the driving circuit (20) is triggered at the same time, and the signal acquisition and control circuit (60) is triggered by the driving circuit (20) to start execution; the pulse laser signals are transmitted into the single-mode sensing optical fiber (70) through the wavelength division multiplexing module (30), and generating a backward Raman scattering signal in the single-mode sensing fiber (70), the backward Raman scattering signal being fed back to the wavelength division multiplexing module (30), the wavelength division multiplexing module (30) sends the back Raman scattering signal to the photodetector (40), the photodetector (40) amplifies the backward Raman scattering signal, and sends the amplified backward Raman scattering signal to the signal acquisition and control circuit (60), the signal acquisition and control circuit (60) converts the backscattered Raman scattering signals into digital signals, and sending the digital signal to the application software (50), wherein the application software (50) processes the digital signal by using a Raman scattering optical time domain reflection technology to obtain the temperature distribution along the measured optical fiber.
2. The multi-professional cable hot spot shared monitoring device based on the single-mode optical cable as claimed in claim 1, wherein: the single-mode sensing optical fiber (70) is any single-mode optical fiber in a communication optical cable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921031617.4U CN210293248U (en) | 2019-07-04 | 2019-07-04 | Cable hot spot multi-professional sharing monitoring device based on single-mode optical cable |
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| CN201921031617.4U CN210293248U (en) | 2019-07-04 | 2019-07-04 | Cable hot spot multi-professional sharing monitoring device based on single-mode optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654684A (en) * | 2021-08-17 | 2021-11-16 | 国网上海市电力公司 | Superconducting cable vibration and temperature measurement system and method adaptive to multiple vibration working conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654684A (en) * | 2021-08-17 | 2021-11-16 | 国网上海市电力公司 | Superconducting cable vibration and temperature measurement system and method adaptive to multiple vibration working conditions |
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