Broadband vibration signal sensor and signal processing device thereof

Abstract

The invention provides a broadband vibration signal sensor and a signal processing device thereof. The broadband vibration signal sensor comprises: a base; a shell which is arranged on the base in a covering manner; a signal processing module which is arranged in the accommodating cavity or outside the accommodating cavity; a piezoelectric component which is arranged in the accommodating cavity and is stacked on the base; a piezoelectric element which is arranged in the accommodating cavity and is stacked on the piezoelectric component; and an elastic element which is arranged in the containing cavity and stacked on the piezoelectric element,whereinthe side, away from the piezoelectric element, of the elastic element is connected to the inner wall of the shell. According to the broadband vibration signal sensor provided by the invention, the piezoelectric element and the piezoelectric component are arranged, and the piezoelectric element is stacked on the piezoelectric component, so that low-frequency vibration signals and high-frequency vibration signals generated at the same position can be collected, errors caused by different mounting positions of the sensor during independent measurement are reduced, and the measurement result is more accurate.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a broadband vibration signal sensor and a signal processing device thereof. Background technique [0002] Power transformer is the core equipment in the power grid, and its safe operation is crucial to the stability of the power grid. In order to ensure the safe and stable operation of the transformer, it is necessary to monitor the operation status of the transformer in real time, so that the fault of the transformer can be found in time when the transformer fails, and further shut down for maintenance. [0003] When a partial discharge fault occurs inside the transformer, a process of charge neutralization will occur, causing the area where the partial discharge occurs to be heated and expanded instantly, similar to an explosion. After the discharge, the area that was originally heated and expanded returns to its original volume, causing a dielectric The density ch...

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Problems solved by technology

[0005] The embodiment of the present invention provides a wide-band vibration signal sensor and its signal processing device, aiming to solve the problem of detecting low-frequency and high-frequency vibration signals in the prior art. Use the acceleration sensor and the ultrasonic sensor to detect the transformer respectively, and the data error of the detection result is relatively large.

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