State monitoring device for optical fiber current sensor
A technology of a condition monitoring device and a current sensor, which is applied to measurement devices, instruments, measuring electrical variables, etc., can solve the problems of reducing the light intensity of the optical circuit, affecting the modulation electrical circuit of the all-fiber current transformer, and optical fiber breakage.
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[0064] Since the fiber current sensor in the prior art has two faults: sudden change and gradual change, the present invention proposes to monitor the working state of important optical devices that may affect the measurement accuracy during its operation and the real-time operation of the sensor. Status parameters, such as light source optical power and operating temperature, circuit power supply stability, modulation depth, etc., so as to realize real-time monitoring and long-term operating status monitoring of the optical fiber current sensor, so that the staff can understand the working status of the optical fiber current sensor and predict the status. Trend.
[0065] like figure 1 As shown in the dashed box in , an embodiment of the present invention provides a state monitoring device 17 for an optical fiber current sensor, including a first optical fiber coupler 10, a second optical fiber coupler 11, a first photodetector 14, The polarization state a...
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