Angular displacement sensor for on-line monitoring of operating mechanism of high voltage circuit breaker

Abstract

The invention discloses an angular displacement sensor for the online monitoring of a high-voltage circuit breaker operating mechanism, and the angular displacement sensor consists of a permanent magnet, a magnetic sensitive element, a detection circuit board, a shaft coupler, a connecting shaft, a signal output socket, a sensor pedestal, a sensor upper cover, a semi-opening elastic metal clamping ring, a sensor fixing screw, a circuit board fixing screw, and a magnet fixing screw. The beneficial effects of the invention lie in that a tested rotating shaft is connected through the shaft coupler for non-contact angular displacement detection; the magnetic sensitive element and the circuit are installed in a cylindrical sealed metal housing which is formed by the sensor upper cover and the sensor pedestal which are in threaded connection; a detection result is outputted through a pair of complementary duty ratios and a PWM waveform which is directly proportional to the angular displacement; the sensor can be suitable for different types of rotating shafts in an effective adjustment range, effectively inhibits the strong electromagnetic interference of a high-voltage circuit breaker monitoring scene, and enables the monitoring result to be more accurate and reliable.

Description

technical field [0001] The invention belongs to an angular displacement sensor, in particular to an angular displacement sensor used for online monitoring of an operating mechanism of a high-voltage circuit breaker. Background technique [0002] The high-voltage circuit breaker plays an important role in control and protection in the power system. Its function is equivalent to a switch, which closes the normal circuit and puts it into the grid operation. harm. As the high-voltage circuit breaker runs longer and some environmental factors, various faults occur, among which mechanical faults are the most common and the most common. When the high-voltage circuit breaker is in operation, its operating mechanism, transmission mechanism and dynamic and static The first-class components need to bear the effects of various energy such as shock, vibration, friction, etc. When the energy reaches a certain value, it will lead to the emergence of harmful processes, causing changes in t...

AI Technical Summary

Problems solved by technology

[0005] Most of the angular displacement sensors adopted in the mechanical monitoring of the existing high-voltage circuit breakers come from the displacement detection of the rotating machinery, and these sensors generally use a single-ended output signal mode, with low output accuracy and complex structure, which is difficult to meet the operating requirements of high-voltage circuit breakers. Due to complex mechanical damage, misdiagnosis and missed diagnosis often occur

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