High-precision LCR measuring device and method based on dual power balance bridge

Abstract

The present invention discloses a high-precision LCR measuring device and method based on a dual power balance bridge. The device comprises: a measuring circuit, an FPGA chip and an ARM chip; whereinthe FPGA chip and the ARM chip are connected through an IO pin, following an FSMC protocol; the FPGA chip is connected to the measurement circuit through the IO pin to realize control and measurementof the measurement circuit; the FPGA chip is controlled by a DA control module #1, a DA control module #2, a first communication module, a switch control module and an AD control module, the ARM chipcomprises a second communication module, a phase amplitude search module, a phase amplitude estimation module and an impedance value calculation module; and the measurement circuit Includes a D / A chip#1, a D / A chip #2, an A / D chip and a program control switch; the device and method is based on the principle of the dual power balance bridge, realizes broadband measurement of an LCR through using the FPGA and the D / A chip, and shortens measurement time and realizes rapid measurement through using related search algorithm.

Description

technical field [0001] The invention relates to the field of LCR measurement, in particular to an LCR measurement device and method based on a dual power supply balance bridge. Background technique [0002] The LCR measuring instrument is a measuring instrument for measuring the inductance L, capacitance C, impedance R and other parameters of components, and is widely used in the field of electronic measurement. The position of LCR measuring instrument in the current electronic industry is particularly important. Electronic products are closely related to LCR measurement technology. From the production of components to the assembly and debugging of large electronic equipment, LCR is worth measuring. [0003] With the development of modern technology, modern society has higher and higher requirements for electronic components, which also means that the development of science and technology requires LCR measurement technology to have higher measurement accuracy. measurement b...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of narrow measurement bandwidth, slow measurement speed and high system cost of analog LCR measuring instruments in the prior art, overcome the shortcomings of poor measurement accuracy of digital LCR measuring instruments in the prior art, and overcome the prior art, Due to the disadvantage of repeated adjustment of the dual-power balanced bridge, a high-precision LCR measuring device and measurement method based on the dual-power balanced bridge is provided.

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