Automatic measuring system for measuring capacitance of multi-channel detector

Abstract

The invention discloses an automatic measuring system for measuring the capacitance of a multi-channel detector. The automatic measuring system comprises a capacitance measuring circuit and a microcontroller; the microcontroller controls the plurality of readout channels of a Micromegas detector to be sequentially connected into the capacitance measuring circuit, controls the capacitance measuringcircuit to sequentially measure capacitance between the plurality of readout channels and the microgrid of the Micromegas detector, performs analog-to-digital conversion on the output signals of thecapacitance measuring circuit, and performs comparison calculation on a conversion result and the calibration result of the capacitance measuring circuit so as to obtain the capacitance values of theplurality of readout channels. With the automatic measuring system provided by the invention adopted, capacitance between each channel of the Micromegas detector and the microgrid can be automaticallyand conveniently measured, and the defect of time-consuming and labor-consuming manual sequential measurement can be eliminated.

Description

Technical field [0001] The invention relates to the technical field of capacitance automatic measurement, in particular to a multi-channel detector capacitance automatic measurement system. Background technique [0002] The micro-mesh, gap, and readout electrode of the Micromegas detector constitute a capacitor with a capacitance of 10pF or 100pF. Under normal circumstances, the capacitance value distribution between each readout bar and the microgrid is relatively consistent. If the capacitance value of a channel is too small or too large, the channel may be damaged or have connectivity problems such as open circuit and short circuit. Therefore, before the detector is energized and tested, the capacitance value of each channel and the microgrid can be measured to conduct a preliminary inspection of the detector. [0003] At present, there are a variety of capacitance measurement methods to measure the capacitance value, such as charging and discharging method, bridge method, etc....

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the object of the present invention is to provide a multi-channel detector capacitance automatic measurement system, which can conveniently and quickly automatically measure the capacitance between each channel of the Micromegas detector and the micro-grid, and overcome the manual sequential measurement time consuming defect

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