Testing method and device of harmonic wave universal meter

A technology for multimeters and measurement methods, applied in multi-tester circuits, spectrum analysis/Fourier analysis, etc., can solve problems such as single function of measuring instruments

Inactive Publication Date: 2012-10-31
UNI TREND TECH (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to effectively solve the problem of a single function of the measuring instrument, and at the same time combine the multimeter and the ha

Method used

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  • Testing method and device of harmonic wave universal meter
  • Testing method and device of harmonic wave universal meter
  • Testing method and device of harmonic wave universal meter

Examples

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Embodiment

[0032] Example: see Figure 1 to Figure 5 , the present embodiment provides a kind of measuring method of harmonic multimeter, it comprises the following steps:

[0033] (1) Set a multimeter body, and set a functional circuit board inside it;

[0034] (2) On the functional circuit board, a functional test unit, a central processing unit and a power supply unit connected to each other are arranged;

[0035] (3) In the functional test unit, a signal conditioning circuit, a multimeter test circuit and a harmonic test circuit connected to each other are set; wherein the multimeter test circuit is a special integrated chip for a multimeter, and the harmonic test circuit includes Fundamental frequency test circuit and high-speed ADC acquisition circuit;

[0036] (4) A software control platform is set in the central processing unit, and the software control platform is provided with the following additional functional modules: HOLD data retention, MAX / MIN maximum / minimum value, RAN...

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PUM

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Abstract

The invention discloses a testing method of a harmonic wave universal meter. The testing method of the harmonic wave universal meter is characterized by comprising the following steps: (1) arranging a universal meter body, and arranging a functional circuit board in the universal meter body; (2) arranging a functional testing unit, a central processing unit and a power supply unit which are connected mutually on the functional circuit board; (3) arranging a signal conditioning circuit, a universal meter testing circuit and a harmonic wave testing circuit which are connected mutually in the functional testing unit; (4) arranging a software control platform in the central processing unit; and (5) powering on so as to enable the universal meter to operate. The invention also discloses a device for implementing the method. According to the invention, the universal meter and a harmonic wave analyzing meter are integrated into a whole, thus the testing is more convenient and rapid, and the harmonic wave universal meter is convenient to carry. By combining with the additional function disclosed by the invention, the harmonic wave universal meter is more intelligent to use, and the testing accuracy is improved greatly.

Description

technical field [0001] The invention relates to the field of electronic information and also to the field of electronic measurement, in particular to a measurement method of a harmonic multimeter and a device for realizing the method. Background technique [0002] The root cause of harmonic generation in power systems is due to non-linear loads. When the current flows through the load, it does not have a linear relationship with the applied voltage, and a non-sinusoidal current is formed, that is, harmonics are generated in the circuit. DC transmission and high-power single-phase rectification technology are widely used in industrial sectors and electrical equipment. Leading to current waveform distortion and three-phase imbalance become increasingly serious, becoming an important factor affecting power quality. Impulsive power loads (such as electric arc furnaces, DC transmission converter stations) put into operation on the grid will cause grid voltage fluctuations, whic...

Claims

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Application Information

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IPC IPC(8): G01R15/12G01R23/16
Inventor 李毓宏
Owner UNI TREND TECH (CHINA) CO LTD
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