VIBRATION DETECTOR WITH ELEMENT OF DIGITAL CALIBRATION Russian patent published in 2015 - IPC G01P15/09 

FIELD: measurement equipment.

SUBSTANCE: vibration detector with a digital calibration element is made in the form of a metal body with a flange for fixation on a controlled object. Inside the sensor body there is a primary piezoceramic converter and an electronic circuit of primary converter coupling. At the same time the electronic circuit of a signal amplification tract comprises a digital potentiometer, making it possible to return sensor transformation ratio to the initial value. The potentiometer is controlled from an outer block of reference pulses, supplied via a process slot in the sensor body during calibration in the setting mode on a vibration test bench of sample values of vibration speed at base frequency and fixation of the sensor output signal on a regular load of a registration unit.

EFFECT: maintenance of vibration detector passport characteristics during entire operation time.

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