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Pulse signal processing and collecting device

A technology of pulse signal and acquisition device, which is used in instruments, computer control, simulators, etc., can solve the problems of large measurement error of pulse signal acquisition, and achieve the effect of accurate cycle counting, reducing influence and improving accuracy.

Active Publication Date: 2020-01-10
CHONGQING CAERI AUTOMOBILE TEST EQUIP DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention intends to provide a pulse signal processing and acquisition device to solve the problem of large measurement errors in pulse signal acquisition

Method used

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  • Pulse signal processing and collecting device
  • Pulse signal processing and collecting device
  • Pulse signal processing and collecting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Pulse signal processing and acquisition devices, such as figure 1 Shown: including pulse signal processing module, AB phase square wave signal processing module, measurement module and communication module, pulse signal processing module is used to suppress pulse signal interference and form square wave signal, square wave signal includes single-phase square wave and two-phase square wave , the two-phase square wave includes A-phase waveform and B-phase waveform. The single-phase square wave is only processed by the pulse signal processing module. The single-phase square wave does not need to be processed by the AB-phase square-wave signal processing module. After the square wave signal is processed, it is output to the measurement module to measure the period, and the communication module sends the period to the background server, which can be a PC computer.

[0038] The pulse signal processing module includes a first-level circuit and a second-level circuit, the first...

Embodiment 2

[0052] On the basis of Embodiment 1, a circuit diagram of pulse signal interference suppression is provided, such as Figure 4 and Figure 5 As shown, in the first-stage circuit, the pulse signal is connected to the 1IN+ pin of the operational amplifier chip through the VO1 pin of the photocoupler chip through the low-pass filter circuit composed of resistor R5 and capacitor C1, and the pulse signal is connected to the VO2 pin of the photocoupler chip. The pin is connected to the 2IN+ pin of the operational amplifier chip through a low-pass filter circuit formed by resistor R7 and capacitor C2. The signal is output to the second-stage circuit through the 1OUT pin after passing through the active low-pass filter circuit formed by the RC network and the operational amplifier. On the 1IN- pin of the LM339 voltage comparator chip, the 1IN+ pin of the LM339 voltage comparator chip is electrically connected to the 2 pin of a CON3 potentiometer, the 1 pin of the CON3 potentiometer is...

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Abstract

The invention relates to the technical field of industrial control sensor signal acquisition, particularly to a pulse signal processing and collecting device. The device comprises a pulse signal processing module and an AB-phase square wave signal processing module, the pulse signal processing module is used for suppressing pulse signal interference and forming square wave signals, and the AB-phase square wave signal processing module comprises: an acquisition unit used for acquiring rising edges and falling edges of A-phase waveforms and B-phase waveforms; a numbering unit used for numberingthe edges of the A-phase waveform rising edge, the A-phase waveform falling edge, the B-phase waveform rising edge and the B-phase waveform falling edge in sequence; and a micro-control unit used forrecording edge number sequences of rising edges and falling edges of the square wave signals according to an edge triggering sequence at multiple moments, matching the edge number sequences with a pre-stored sequence, and discarding AB-phase square wave signals in the period when matching fails. According to the invention, the purpose of filtering interference signals with a large amplitude and long duration is achieved, and subsequent counting and frequency measurement of square wave signals are more accurate.

Description

technical field [0001] The invention relates to the technical field of industrial control sensor signal acquisition, in particular to a pulse signal processing and acquisition device. Background technique [0002] In the field of industrial control, sensors that output in the form of pulse signals are widely used, such as encoders, torque sensors, linear gratings, etc. Due to the complex electromagnetic environment in which the sensors work, the pulse signals output by the sensors are often affected by various external interference sources. (such as inverters, motors, etc.), a lot of noise is superimposed on the normal signal, which affects the accuracy of subsequent pulse signal measurement, especially for sensors that output AB phase signals. How to suppress and eliminate the interference signal and make the pulse signal as clean as possible is an important problem that must be solved. [0003] At present, the commonly used methods for pulse signal processing are optocoup...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0428G05B2219/2612
Inventor 王曦李貌王琳张皓峰
Owner CHONGQING CAERI AUTOMOBILE TEST EQUIP DEV