Strong vibration sensor circuit for high-voltage circuit breaker and signal acquisition system

Abstract

The invention discloses a strong vibration sensor circuit for a high-voltage circuit breaker and a signal acquisition system. The circuit comprises a charge-voltage conversion unit, a second-order low pass filter unit and a multi-gear amplifying unit, can receive huge charge quantity produced by a strong vibration signal of a high-voltage-class sensor testing high-voltage circuit breaker and can still work stably even under the situation that an electromagnetic environment is severe. The charge-voltage conversion unit adopts a self-discharge integral circuit having a direct-current eliminating function, the multi-gear amplifying unit adopts a fixed resistor for splicing and gear shifting, the resistance value dispersity is small, gear shifting is accurate, a positioner is designed, the dispersity of a sensor is offset, and the problems of low charge sensitivity at high accelerated speed and poor electromagnetic environment at high voltage class are solved. The circuit is simple in principle, ingenious in design, suitable for occasions where strong vibration is acquired and the electromagnetic environment is severe and is beneficial to popularization, and the costs of voltage classes are low.

Description

technical field [0001] The invention belongs to the technical field of vibration signal measurement of high-voltage circuit breakers, and in particular relates to a strong vibration sensor circuit and a strong vibration signal acquisition system for high-voltage circuit breakers. Background technique [0002] High-voltage circuit breakers are important and typical electrical equipment in power systems, and their operational reliability is crucial. When a fault occurs in the power system, if the circuit cannot be disconnected in time to cut off the fault, a major accident may occur. Therefore, a fault diagnosis system is often designed . The validity and authenticity of vibration signal data collection is the key link of the diagnostic system, and vibration sensors have always played an important role in the fault detection of high-voltage circuit breakers. In the field of higher-level high-voltage circuit breakers, there is an urgent need for large-range, high-reliability v...

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Problems solved by technology

[0003] Purpose of the invention: In order to overcome the problem of low reliability of strong vibration signal acquisition in the prior art, the purpose of the present invention is to provide a strong vibration sensor circuit and signal acquisition system for high-voltage circuit breakers to further improve the reliability of the equipment and sensor range

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