Electrostatic field equipotential line tracer based on two-dimensional coordinate orifice plate

Abstract

The invention discloses an electrostatic field equipotential line tracer based on a two-dimensional coordinate orifice plate. The electrostatic field equipotential line tracer comprises a two-dimensional coordinate orifice plate, an automatic recording digital voltmeter, a voltage-stabilization steady-current DC voltage, a DC power source, a simulation field to be tested, and a probe; the two-dimensional coordinate orifice plate is fixedly connected with the simulation field to be tested; the voltage-stabilization steady-current DC voltage supplies power to the simulation field to be tested; awire connected to the probe is connected to a + terminal of a DC power supply voltmeter; a - terminal of the DC power supply voltmeter is connected to a negative pole of the voltage-stabilization steady-current DC voltage; a signal input end of a detection terminal of the automatic recording digital voltmeter is connected with the probe, and a ground of the detection terminal of the automatic recording digital voltmeter is connected to a negative pole of the DC power source. The negative pole of the DC power source is selected as a zero potential reference point. The electrostatic field equipotential line tracer can be applied to various different dielectrics, is accurate in measurement result, can automatically record data, is convenient, fast, visual and intuitive, is low in cost, and can easily carry out large-scale promotion.

Description

technical field [0001] The invention belongs to the field of electrical and electronic measuring equipment, in particular to an electrostatic field equipotential line tracer based on a two-dimensional coordinate orifice plate. Background technique [0002] Electrostatic field description is a physical experiment commonly offered by colleges and universities at home and abroad. At present, middle schools also offer this experiment. Because it is very difficult to directly describe the electrostatic field, the distribution law of the steady current field in the conductor—the distribution of current intensity and potential difference The law and the distribution law of the field strength and potential difference of the electrostatic field can be expressed by the same mathematical relationship, so the static and constant current field is usually used to simulate the electrostatic field. According to different conductive media, the current electrostatic field tracer can be divide...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of using conductive paper as a dielectric are: (1) The conductive thin layer on the conductive paper is unevenly coated, and the resistance of the conductive paper is poorly uniform in all directions, so that the current field distribution is not exactly the same as the simulated electrostatic field distribution, making The accuracy and repeatability of the experiment are poor; (2) The contact between the electrode and the conductive paper is uneven, and the contact between the probe and the conductive paper will vary from person to person and the number of times, making the contact resistance unstable and affecting the drawing results; (3) During the measurement, the probe moves on the conductive paper and touches it repeatedly, causing the conductive paper to be damaged. On the one hand, it directly affects the conductive performance of the conductive paper and affects the experimental results. On the other hand, it affects the service life of the conductive paper. Frequent replacement of the conductive paper, Increased the cost of the experiment; the disadvantage of using conductive glass as a dielectric instead of conductive paper is that the price of conductive glass is expensive, and the conductive glass is easily damaged; using conductive microcrystals as a dielectric is currently the best choice, and there is no such thing as conductive microcrystals. There are various drawbacks in using conductive paper, electrolyte, and conductive glass. Therefore, electrostatic field tracers using conductive microcrystals as dielectrics are gradually popularized.

This method of manually finding points is very inefficient. Although some automatic electrostatic field plotters have appeared in recent years, these fully automatic electrostatic field plotters generally use stepping motors, acquisition cards and screw guide rails, etc., and have to be programmed. related software, so it is difficult to promote it on a large scale

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