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Non-contact conductometry measuring device stimulated by quartz crystal oscillator and method

A technology of non-contact conductance and quartz crystal, which is applied in the direction of measuring device, fluid resistance measurement, and electric variable measurement, and can solve the problems of bulky signal generator, unfavorable device miniaturization and practicality, and complex structure of conductance measuring device. Achieving a wide measurement range, achieving miniaturization, and simplifying the structure

Inactive Publication Date: 2011-01-26
ZHEJIANG UNIV
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Problems solved by technology

[0004] However, as a relatively new conductometric measurement method, the existing capacitively coupled non-contact conductometric measurement technology still has some shortcomings. The existing technology uses a signal generator as an excitation source, and the signal generator is bulky, making the conductometric measurement difficult. The structure of the device is complicated, which is not conducive to the miniaturization and practicalization of the device

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  • Non-contact conductometry measuring device stimulated by quartz crystal oscillator and method
  • Non-contact conductometry measuring device stimulated by quartz crystal oscillator and method
  • Non-contact conductometry measuring device stimulated by quartz crystal oscillator and method

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Embodiment Construction

[0020] Generally, a non-contact conductivity measurement device includes a conductivity sensor, an excitation source and a detection module. The present invention is based on the prior art, by improving the excitation source and using a quartz crystal excitation module as the excitation source, so as to achieve the purpose of the present invention. see figure 1 and figure 2 , in the non-contact conductivity measurement device excited by the quartz crystal oscillator of the present invention, the conductivity sensor includes an excitation electrode 4, a detection electrode 5, an insulated measurement pipeline 6, an excitation electrode shield 7, a detection electrode shield 8 and an active shield module 9 , the excitation electrode 4 and the detection electrode 5 are installed on the outer wall of the insulated measuring pipe 6, and the excitation electrode shield 7 is installed on the periphery of the excitation electrode 4, and the excitation electrode 4 and the excitation ...

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Abstract

The invention discloses a non-contact conductometry measuring device stimulated by a quartz crystal oscillator and a method. In an excitation source of the quartz crystal oscillator, the output end of the quartz crystal oscillator is connected with the input end of a DC-blocking and amplitude-adjusting circuit the output end of which is connected with one end for quartz crystal measurement, wherein in the quartz crystal oscillator, a stimulating quartz crystal and a measuring quartz crystal have the same impedance-frequency characteristics, the input end of a first inverter is respectively connected with one end of a first resistor and one end of the stimulating quartz crystal, the output end of the first inverter is respectively connected with the other end of the first resistor and one end of a first capacitor, the input end of a second inverter is respectively connected with the other end of the first capacitor and one end of the second resistor, the output end of the second inverter is respectively connected with the other end of the second resistor and one end of an adjustable capacitor, and the other end of the adjustable capacitor is connected with the other end of the stimulating quartz crystal. The invention realizes the miniature and the practicability of the conductometry measuring device, has wider measuring range and takes favorable effect.

Description

technical field [0001] The invention relates to conductance detection technology, in particular to a non-contact conductance measurement device and method excited by a quartz crystal oscillator. Background technique [0002] The liquid phase system in the pipeline widely exists in the scientific research and production process of metallurgy, chemical industry, biomedicine, environmental protection and sewage treatment and other departments. The conductivity is one of the basic physical parameters of the liquid. Other characteristic parameters of the liquid play an important role, such as concentration, liquid composition, chemical reaction rate, etc. It is precisely because many differences in physical and chemical properties of liquids will be reflected in changes in their conductivity, so the measurement of the conductivity of liquids in pipelines has a very wide range of applications and very important research significance in scientific research and production. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R27/22
Inventor 冀海峰傅三富王保良黄志尧李海青
Owner ZHEJIANG UNIV
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