Method for utilizing hollow electric compensation electrode to monitor vertical calculating capacitor

Abstract

The invention provides a method for utilizing a hollow electric compensation electrode to monitor a vertical calculating capacitor and belongs to the field of metrological primary standard testing. The method comprises the steps of: utilizing the hollow electric compensation electrode to measure the measurement sensitivity kONE thereof to the position change of a single metal main electrode; utilizing the hollow electric compensation electrode to measure the measurement sensitivity kALL thereof to the interval change among all the four metal main electrode; and utilizing the hollow electric compensation electrode to monitor the vertical calculating capacitor in such a manner that after the vertical calculating capacitor device runs for a long time, a commercial capacitance bridge to measure the capacitance differences between a circular auxiliary electrode in the hollow electric compensation electrode, each metal main electrode in the vertical calculating capacitor device and all the four metal electrodes respectively when a movable shielding electrode in the vertical calculating capacitor device is arranged on the lowest position and the highest position, and comparing the five capacitance differences with an initial standard value measured when the vertical calculating capacitor is installed and runs normally.

Description

technical field [0001] The invention belongs to the field of measurement base standard testing, and specifically relates to a method for monitoring vertical calculation capacitance by using a hollow electric compensation electrode, which is used for tracing the source of traditional electrical AC impedance—monitoring the position ideality of a four-electrode system for calculation capacitance reference . Background technique [0002] In the field of electromagnetic metrology, computational capacitance is currently the highest accuracy level (10 -8 )installation. From value reproduction to transmission, the whole system is relatively complete. In the field of electromagnetic metering, as well as other metering fields, computing capacitance devices play an important role. It itself is the measurement benchmark of AC impedance, and at the same time, it is combined with the existing quantum Hall resistance device in China to measure the fine structure constant and provide exp...

AI Technical Summary

Problems solved by technology

[0014] 1. The increase of non-cylindricity caused by the surface defects and oil pollution of the four metal main electrodes themselves;

[0015] 2. The four metal main electrodes are not parallel to each other and skewed to each other

At this time, the capacitance value of the calculated capacitance reference itself will have a certain small deviation δC, which will affect the measurement accuracy of the entire system

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