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RLC measuring instrument and measuring method

A measuring instrument and output terminal technology, applied in the direction of measuring electrical variables, measuring devices, measuring resistance/reactance/impedance, etc., can solve problems such as not meeting the frequency range of equipment measurement, and achieve easy upgrade and maintenance, high frequency resolution, and phase The effect of continuous change

Inactive Publication Date: 2014-11-12
YANCHENG INST OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the measurement frequency of the products on the market is mostly between 30HZ and 300KHZ (designed with a single-chip microcomputer), which cannot meet the requirements of the equipment measurement frequency range.

Method used

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  • RLC measuring instrument and measuring method
  • RLC measuring instrument and measuring method
  • RLC measuring instrument and measuring method

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, the present invention has designed a kind of RLC measuring instrument, comprises pre-detection circuit module, differential processing circuit module, detection circuit module, integration module, signal acquisition and processing control single-chip microcomputer, dual-port RAM, input and output control module, input module, Output module, low-pass filter module and D / A converter; Also comprise CPLD control board, wherein, the output end of pre-detection circuit module is connected with the input end of differential processing circuit module, the output end of differential processing circuit module is connected with One of the input terminals of the detection circuit module is connected, the output terminal of the detection circuit module is connected with the input terminal of the inte...

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Abstract

The invention relates to an RLC measuring instrument. The CPLD technology is adopted for replacing a digital circuit to generate sine detection signals, chip resources on a CPLD development board are rich, PLLs are contained in the CPLD development board, and the frequency can be multiplied and divided conveniently. The RLC measuring instrument comprises a storage unit, a ROM table macroblock can be directly called, an SOPC can be used as a kernel, high-frequency test signals can be obtained conveniently, and the waveform quality of the sine detection signals can be improved. The invention further relates to a measuring method based on the RLC measuring instrument. The direct digital frequency synthesis technique is adopted, the frequency and the phase of the output sine detection signals can be accurately controlled, and meanwhile, the measuring instrument has the advantages that frequency switching time is short, the frequency resolution is high, the phase is changed continuously, phase noise and drifting are low, and integration and adjustment are easy.

Description

technical field [0001] The invention relates to an RLC measuring instrument and a measuring method. Background technique [0002] The RLC component parameter measuring instrument is a measuring instrument used to measure the concentrated parameters resistance R, inductance L, inductance M, capacitance C and quality factor Q. It is widely used in various related parameters in the material industry, pharmaceutical industry, and electronic information industry. Versatile instrument for measurement and data analysis. [0003] Resistors, inductors, and capacitors are frequently used electronic components in terms of type and quantity. With the development of electronic materials, processes and applications, the quality factors of components such as resistors, inductors, and capacitors, and their quality factors The characteristics of its value under different frequency electronic circuits put forward higher requirements. The inductance of most inductors will vary greatly when u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R27/26
Inventor 安晶徐友武刘学然李青祝阳程
Owner YANCHENG INST OF TECH
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