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Pressure sensing module dynamic weak capacitance detection circuit

A technology of weak capacitors and sensing modules, applied in the field of sensors, can solve problems such as poor anti-interference ability, achieve signal isolation and filtering, facilitate collection and recording, and improve the effect of anti-interference ability

Inactive Publication Date: 2018-12-18
JIANGSU XINTONGDA ELECTRONICS SCI & TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing weak electrical signal has poor anti-interference ability in the conditioning process, and it is necessary to provide a pressure sensing module dynamic weak capacitance detection circuit for amplifying the weak sensing dynamic capacitance signal and realizing signal isolation and filtering.

Method used

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  • Pressure sensing module dynamic weak capacitance detection circuit
  • Pressure sensing module dynamic weak capacitance detection circuit

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Embodiment Construction

[0013] exist Figures 1 to 2 In the illustrated embodiment, a dynamic weak capacitance detection circuit of a pressure sensing module is composed of a pressure sensor, an energy transfer module, an amplification and filtering unit, a waveform finishing module, a volt-ampere test module, a control chip and a power interface; The signal passes through the energy conversion module, the amplification and filtering unit and the waveform finishing module in sequence, and is detected by the volt-ampere test module, and the measurement result is recorded by the control chip; the energy conversion module is connected between the pressure sensor and the amplification and filtering unit; the The waveform arrangement module is connected between the amplification filter unit and the volt-ampere test module; the volt-ampere test module is connected between the waveform arrangement module and the control chip; the power interface is connected with each of the above circuit modules to provide ...

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Abstract

The invention provides a pressure sensing module dynamic weak capacitance detection circuit. The pressure sensing module dynamic weak capacitance detection circuit provided by the invention can carryout amplification processing on a weak sensing dynamic capacitance signal and implements isolation and filtering of the signal, so that the anti-interference ability of the weak signal in the conditioning process is improved; and moreover, the pressure sensing module dynamic weak capacitance detection circuit is also convenient to acquire and record the weak electric signal.

Description

technical field [0001] The invention relates to a device in the field of sensors, in particular to a dynamic weak capacitance detection circuit of a pressure sensing module with various functions. Background technique [0002] Capacitive sensors play a pivotal role in both national defense and civilian applications. With the rapid development of micro-electromechanical systems (MEMS), the capacitance signal of MEMS micro-capacitance sensors becomes weaker. At present, there are great difficulties in detecting the capacitance below pF at home and abroad, and the weak capacitance detection technology has become the bottleneck of the development of capacitive sensor technology. More and more researchers pay more and more attention to the research on the weak capacitive sensing signal reading circuit technology. Research and development of a weak capacitance detection circuit with high resolution, high sensitivity and good stability has become an indispensable part of a techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14G01L9/12
CPCG01L1/142G01L9/12
Inventor 梁超强
Owner JIANGSU XINTONGDA ELECTRONICS SCI & TECHCO