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High-precision multi-range weak current detection system

A weak current and detection system technology, applied in the direction of measurement using digital measurement technology, to achieve the effect of improving dynamic range, reducing cost, and improving signal-to-noise ratio

Active Publication Date: 2016-03-23
ZHEJIANG IND POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that microcurrent has great practical significance. A high-precision multi-range weak current detection system researched by the present invention can solve the problems of reducing product cost, improving the dynamic range of measurement, and improving the signal-to-noise ratio

Method used

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  • High-precision multi-range weak current detection system

Examples

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Embodiment 1

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as Figure 1-10 As shown, a high-precision multi-range weak current detection system of this embodiment includes a reset circuit 13, a single-chip microcomputer control circuit 1 connected to the reset circuit 13 through a line, and the single-chip microcomputer control circuit 1 is respectively connected to the dynamic zero adjustment circuit through a line. The circuit 2, the process amplification circuit 3, the signal selection circuit 4, the preamplification circuit 5, the reference signal generation circuit 6, and the sine wave signal generation circuit 7 are connected; the dynamic zeroing circuit 2 is connected to the process amplification circuit 3 through a line; Described process amplifying circuit 3 is connected with saturation discriminating circuit 8; Described saturation discriminating circuit 8 is connected w...

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Abstract

The invention discloses a high-precision multi-range weak current detection system comprising a reset circuit and a single-chip microcomputer control circuit connected with the reset circuit by a line. The single-chip microcomputer control circuit is connected with a dynamic zero-adjusting circuit, a process amplifying circuit, a signal selecting circuit, a pre-amplifier circuit, a reference signal generating circuit, and a sine wave signal generating circuit by the line. According to the invention, time-sharing gating is realized by using an analog switch switching circuit, so that the detected current passes through the linear amplification circuit or non-linear circuit and then passes through the process amplifying circuit, a phase-sensitive demodulation circuit, and a low-pass filtering circuit. Range-dividing measurement is carried out; the product cost is reduced; the dynamic range of measurement is improved; and the signal to noise ratio is improved, thereby enhancing the measurement precision.

Description

technical field [0001] The invention relates to a high-precision multi-range weak current detection system. Background technique [0002] After humans enter the information age, more and more information needs to be obtained, and a large part of the information is obtained through detection signals. With the development of science and technology to the microscopic world, often many signals to be detected are very weak. Because this part of the signal to be tested is very weak, when the measured signal is weak enough to be compared with the noise, it is often submerged by the noise. At this time, its detection often becomes extremely difficult, and conventional detection methods cannot solve it. Weak signal detection is an emerging technical science that uses modern electronics, information theory, and physics to analyze the causes and laws of noise, study the characteristics and correlation of the measured signal, and extract useful signals from noise. Weak signal detectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
Inventor 胡红钱吴瑞唐施敏毛荣高奇峰
Owner ZHEJIANG IND POLYTECHNIC COLLEGE
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