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Signal processing circuit applied to inductive sensor

A technology of a signal processing circuit and an inductive sensor, applied in the field of signal processing, can solve the problems of complex circuit structure and imperfect signal noise processing of the signal processing circuit, and achieve the effects of simple circuit structure, improved load-carrying capacity, and strong practicability.

Inactive Publication Date: 2017-03-22
GUANGZHOU SONGBIN ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the signal noise processing of the existing signal processing circuit is not perfect enough, and the circuit structure is too complicated, which cannot be well applied to the detection work of the inductive sensor.

Method used

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  • Signal processing circuit applied to inductive sensor
  • Signal processing circuit applied to inductive sensor
  • Signal processing circuit applied to inductive sensor

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Embodiment Construction

[0015] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0016] Such as Figure 1 to Figure 3 As shown, this embodiment provides a signal processing circuit applied to an inductance sensor, which includes an analog signal amplification circuit 1 , a full-wave rectification circuit 2 and a low-pass filter 3 connected in sequence. During specific work, after the inductance sensor outputs the measurement signal, the present embodiment preliminarily processes the signal through the analog signal amplifier circuit 1, amplifies the signal, and blocks the DC; utilizes the full-wave rectifier circuit 2 to differentially amplify the signal, thereby improving the signal The accuracy and signal-to-noise ratio are improved; the low-pass filter 3 signal is used for low-pass filtering processing, and the signal anti-in...

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Abstract

The invention relates to the technical field of signal processing, and particularly relates to a signal processing circuit applied to an inductive sensor. The signal processing circuit comprises an analog signal amplifying circuit, a full-wave rectifying circuit and a low-pass filter which are successively connected, wherein the analog signal amplifying circuit comprises a first operational amplifier, a second operational amplifier, a third operational amplifier, a fourth amplifier and a transformer. According to the invention, the first operational amplifier and a peripheral circuit form a Wien bridge, and preliminary processing is performed on carrier waves inputted by the inductive sensor by using the Wien bridge so as to enable the waveform to be more standard; and meanwhile, amplification and signal blocking are performed through the transformer and the plurality of operational amplifiers, so that the load bearing capacity of the circuit is improved, and direct-current noises in alternating current signals are filtered. The signal processing circuit is simple in structure and has very high practicability.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a signal processing circuit applied to an inductance sensor. Background technique [0002] As we all know, the inductive displacement sensor has the advantages of high sensitivity and resolution, good linearity, reliable operation, and long life. As a precision displacement detection component, it has been widely used in many fields. In the portable displacement detection system, a microprocessor is usually used to process the displacement signal and control it. This requires the design of a signal transmission circuit matched with the sensor to convert the alternating signal output by the inductive displacement sensor into a signal proportional to the displacement. The DC signal is input into the microprocessor after A / D conversion. [0003] At present, the signal noise processing of the existing signal processing circuit is not perfect enough, and the circuit structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 李玉盛
Owner GUANGZHOU SONGBIN ENG TECH CO LTD
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