Piezoelectric acceleration sensor capable of detecting working state in real time and detection method

Abstract

The invention provides a piezoelectric acceleration sensor capable of detecting a working state in real time and a detection method. The sensor comprises a base, a shell is fixed on the base, a sensorcore is fixed in the shell, a cable connector is arranged on the shell, and the cable connector is connected with a signal output cable. The sensor core comprises a core base, a square base column isarranged in the middle of the core base, the two sides of the square base column are each provided with a plane shearing type signal acquisition piezoelectric ceramic, each signal acquisition piezoelectric ceramic is sleeved with a mass block, and the outside of each mass block is fixed through a pre-tightening ring; a hole is punched in the square base column, and annular shearing type excitation piezoelectric ceramic is fixed on the square base column through conductive adhesive; and the core base is sleeved with a core shell, a step installation circuit board is arranged in the core shell,a cover plate is arranged on the upper portion of the core shell, and an adapter plate is arranged on the cover plate. Whether the sensor is in a correct installation state or not and whether the sensor works normally or not can be conveniently and rapidly checked in real time.

Description

Technical field: [0001] The invention relates to a piezoelectric acceleration sensor capable of real-time detection of working status and a detection method, belonging to the technical field of sensor measurement. Background technique: [0002] In recent years, with the rapid development of industries such as the Industrial Internet of Things, Industry 4.0, and new infrastructure, the demand for sensors is also increasing. Piezoelectric acceleration sensors use piezoelectric materials as conversion elements to output electrical signals proportional to acceleration. It has a series of advantages such as simple structure, high rigidity, wide dynamic range, wide frequency response, and reliable operation. It has become the most widely used sensor in vibration and shock measurement. [0003] The high-frequency characteristics of an acceleration sensor depend on the sensor's installed resonant frequency. The installation resonant frequency directly affects the upper limit of th...

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Problems solved by technology

However, after the sensor is installed, as the object under test vibrates continuously, the installation may become loose, changing the installation resonant frequency of the sensor, and then changing the high-frequency characteristics of the sensor, resulting in a large deviation in the output signal and unreliable test data. In some industrial control occasions, false alarms may even cause great losses

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