Self-inspection type optical fiber arc sensor
A sensor and optical fiber technology, applied in the field of self-checking optical fiber arc sensors, can solve problems such as sensor failure, achieve low cost, ensure safe operation, and improve reliability.
Inactive Publication Date: 2017-02-22
NANJING INST OF TECH
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However, this method has defects: the receiving end of the sensor is separated from the sensing probe by tens of meters, and the sensor will fail when the optical fiber at the two ends is broken.
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[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0021] figure 1 The fiber optic arc light sensor in includes: light source 1, light detector 2, first small-diameter optical fiber 3, large-diameter optical fiber 4, annular reflective film 5, sensing probe housing 6, optical film 7, plano-convex lens 8 and second small-diameter Fiber 9. The first small-diameter optical fiber 3 respectively connects the light source 1 / photodetector 2 with the large-diameter optical fiber 4 . Connection point cross section such as Figure 4 As shown, the diameter of the large-diameter optical fiber 4 is twice that of the first small-diameter optical fiber 3 . Such as image 3 As shown, the other end face of the large-diameter optical fiber 4 is aligned and ...
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The invention discloses a self-inspection type optical fiber arc sensor. The sensor comprises a light source, an optical fiber, an optical detector and an arc sensor probe. The optical fiber comprises first small-diameter optical fibers and a large-diameter optical fiber, wherein one end of each of the two first small-diameter optical fibers is respectively connected with the light source and the optical detector while the other end is connected with one end face of the large-diameter optical fiber, and meanwhile, the other end of the large-diameter optical fiber is connected with the arc sensor probe. The invention has the advantages that (1) the self-inspection type optical fiber arc sensor is capable of effectively detecting an arc short circuit fault generated in a switch cabinet and guaranteeing the safe running of power equipment; (2) the probe of the arc sensor provided by the invention is fully passive and is suitable for the industry related to the power system; (3) except for the function of detecting an arc signal, the real-time detection for the sensor can be realized, so that the reliability of an arc protecting system can be increased; (4) the sensor has the characteristics of simple structure and low cost.
Description
technical field [0001] The invention relates to a self-checking optical fiber arc light sensor, which belongs to the technical field of electric power system arc light protection sensing. Background technique [0002] In recent years, with the rapid development of the domestic power industry, the number of applications for medium and low voltage switchgears is increasing. Arc light short circuit inside the switchgear is a frequent and catastrophic fault, which threatens the safe operation of power equipment more and more seriously. Therefore, it is of great significance to take effective arc protection measures to improve the safety of the power system. [0003] When the switchgear arc protection system detects arc light, it can cut off the circuit in a very short time, so as to ensure the safety of electric equipment. Therefore, it is very important to design an arc detection sensor to realize arc protection. The arc detection sensor judges the generation of arc by detec...
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Login to View More IPC IPC(8): H02H1/00H02H7/22
CPCH02H1/0015H02H7/22
Inventor 韦朴邓路李辉
Owner NANJING INST OF TECH