Signal processing system for suppressing signal interference of motor vehicle detection device

A detection device and signal processing technology, applied in the direction of DC-coupled DC amplifiers, differential amplifiers, etc., can solve the problems of large zero drift of the instrument, unstable measurement, slow response of the instrument, etc., to improve the linearity and suppress the gain resistance impedance. Matching problem, effect of preventing oscillation phenomenon

Pending Publication Date: 2020-05-15
广西微车检智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current automobile security inspections have not applied the corresponding integrated analog chip technology, so the current domestic automobile inspection field generally has shortcomings such as unstable measurement, large noise, large zero drift of the instrument, and slow response of the instrument.

Method used

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  • Signal processing system for suppressing signal interference of motor vehicle detection device
  • Signal processing system for suppressing signal interference of motor vehicle detection device
  • Signal processing system for suppressing signal interference of motor vehicle detection device

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Embodiment

[0018] As shown in the figure, a signal processing system for suppressing signal interference of a motor vehicle detection device, the signal processing system includes a noise reduction circuit arranged between the switching power supply and the detection device, and a suppression circuit connected to the sensor circuit of the detection device, Instrument amplification circuit; the input end of the suppression circuit is connected with the output end of the sensor circuit; the output end of the suppression circuit is connected with the input end of the instrument amplification circuit. The sensor circuit is set in the detection device, and the switching power supply is used to provide power for each circuit of the detection device and the signal processing system.

[0019] The noise reduction circuit includes an LC filter, a DC / DC converter and a voltage regulator connected in sequence.

[0020] The suppression circuit comprises a common-mode resistor R1, a common-mode resist...

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Abstract

The invention discloses a signal processing system for suppressing signal interference of a motor vehicle detection device. The signal processing system comprises a noise reduction circuit arranged between a switching power supply and the detection device, and a suppression circuit and an instrument amplification circuit which are connected with a sensor circuit of the detection device, the inputend of the suppression circuit is connected with the output end of the sensor circuit; and the output end of the suppression circuit is connected with the input end of the instrument amplifying circuit. According to the invention, power supply noise and signal interference are effectively suppressed, and the signal linearity and accuracy are improved.

Description

technical field [0001] The invention relates to the field of motor vehicle detection, in particular to a signal processing system for suppressing signal interference of a motor vehicle detection device. Background technique [0002] Since the state formulated and required quality inspection units to implement motor vehicle safety technical inspection standards, many equipment manufacturers, testing agencies, and information networking companies have emerged across the country. For motor vehicle networking companies, they mainly strictly implement national standards. Equipment manufacturers The manufacturing inspection bench also provides testing devices, and the testing devices must meet the indicators specified by the national standards. Prior to this, domestic automobile testing devices used a large number of circuits designed with passive LCR, NPN and other triodes. These circuits had defects such as bulky size, long development cycle, and unstable testing. In recent yea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45
CPCH03F3/45
Inventor 黄艺少罗宇秦
Owner 广西微车检智能科技有限公司
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