Gap measuring device

Abstract

The utility model provides a gap measuring device which comprises a circuit board, an electrode part and a processing module, the electrode part and the processing module are both connected to the circuit board, the electrode part is electrically connected with the processing module, the electrode part and a target conductor part form a capacitor, and the capacitance value of the capacitor is used for calculating a gap; the processing module applies excitation voltage to the electrode part to obtain a capacitance value and converts the capacitance value into target gap data, and the target gap data indicates the gap between the bearing base and the target conductor part; the processing module comprises a controller, a capacitance-to-digital converter and a digital potentiometer, the capacitance-to-digital converter is connected with the controller, the capacitance-to-digital converter is connected with the electrode component and used for converting signals, and the digital potentiometer is connected with the capacitance-to-digital converter; and the resistance value of the amplifying circuit is adjusted so as to adjust the range of the excitation voltage. The function of increasing the measuring range of the gap measuring device is achieved, and the applicability of the gap measuring device is improved.

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