Resistance measurement circuit and resistance measurement device

A resistance measurement and circuit technology, which is used in the measurement of electrical variables, resistance/reactance/impedance, measurement devices, etc. The effect of expanding the measurement range

Pending Publication Date: 2019-01-04
于创宇
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Problems solved by technology

[0004] However, in actual measurement, when the above-mentioned instruments are used for measurement, t

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  • Resistance measurement circuit and resistance measurement device
  • Resistance measurement circuit and resistance measurement device
  • Resistance measurement circuit and resistance measurement device

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[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] In the process of measuring resistance in practice, inaccurate measurement is often encountered. Through in-depth study of the existing measurement methods, the applicant found that the existing measurement methods have certain measurement errors, resulting in inaccurate measurement. There are usually the following measurement methods:

[0029] The classic measurement method of resistance is voltammetry. The principle of this method is Ohm's law of partial circuits and Ohm's law of closed circuits.

[0030] Th...

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Abstract

The present invention discloses a resistance measurement circuit and a resistance measurement device. The resistance measurement circuit comprises: a data collection module comprising a to-be-measuredresistor connection end, a reference resistor connection end and a data signal output end, and configured to collect currents or voltages of a resistor to be measured and a reference resistor, wherein the to-be-measured resistor connection end and the reference resistor connection end are electrically isolated with the output end, and an input end, the output end and the power source are isolatedto one another; and a measurement module connected with the data signal output end and configured to measure the current or the voltage output by the data signal output end to measure the resistancevalue of the to-be-measured resistor. The data collection and the data measurement achieve electrical isolation to apply different voltages or currents or output different voltages or currents at thesame time and select reference points according to the physics and mathematics definition of the resistor so as to reduce the differential mode interference, the common mode interference and the noiseinterference, greatly facilitate resistance measurement, extend the measurement range, effectively reduce the measurement errors and improve the measurement precision.

Description

technical field [0001] The invention relates to the technical field of electromagnetic measurement, in particular to a resistance measuring circuit and resistance measuring equipment. Background technique [0002] Resistive elements are energy-consuming elements that hinder current flow. For example, light bulbs, electric heaters, etc. can use resistive elements as their circuit models. According to Ohm's law, the current I flowing through the resistive element is proportional to the voltage U across the resistor, [0003] Almost all electrical equipment has resistance elements. Even if there is no special resistor, the conductor is an equivalent resistance, so resistance measuring instruments are commonly used, such as single-arm bridges for measuring resistance values, double-arm bridges for measuring small resistances, Insulation resistance meter (megohmmeter) for measuring insulation resistance, grounding resistance measuring instrument for measuring grounding resistanc...

Claims

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Application Information

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IPC IPC(8): G01R27/08
CPCG01R27/08
Inventor 于创宇
Owner 于创宇
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