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Testing apparatus of conductivity and electrical equipment

A test device and conductivity technology, applied in the direction of measurement device, measurement of resistance/reactance/impedance, measurement of electrical variables, etc., can solve the problems that cannot be provided by users, low resolution, test electrode polarization, etc., to reduce noise and fluctuation situation, improve user experience, and ensure the effect of accuracy

Inactive Publication Date: 2016-06-08
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
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Problems solved by technology

However, if the DC voltage signal is used as the DC excitation signal, it will cause the polarization of the test electrode; if the AC voltage signal is directly used as the AC excitation signal, the requirements for the stability of the amplitude and frequency of the AC excitation signal are high, and The polarization of the test electrode will be caused by the DC component in the AC excitation signal. At the same time, the test results of the AC excitation signal are not well compatible with digital circuits, so it cannot provide users with intuitive conductivity test results.
Also, substances with high conductivity cannot be accurately tested due to their low resolution

Method used

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  • Testing apparatus of conductivity and electrical equipment
  • Testing apparatus of conductivity and electrical equipment
  • Testing apparatus of conductivity and electrical equipment

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Embodiment Construction

[0035] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0036] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0037]figure 1 A schematic structural diagram of a conductivity testing device according to an embodiment of the present invention is shown.

[0038] Such as figure 1 As shown, the conductivity tes...

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Abstract

The invention provides a testing apparatus of conductivity and electrical equipment. The testing apparatus comprises a square wave generation source, a first filter circuit, a testing electrode unit, a current detection circuit, a frequency multiplier circuit, and a signal processing circuit. To be specific, the square wave generation source is used for generating a square wave signal. The first filter circuit connected to the square wave generation source is used for carrying out filtering processing on a square wave signal to obtain a sinusoidal signal not including a direct-current component, wherein the sinusoidal signal is used as a testing voltage. The testing electrode unit includes one group of testing electrodes and is connected to the first filter circuit. The current detection circuit is used for detecting a current signal flowing through the testing electrode unit and converting the detected current signal into a corresponding voltage signal. The frequency multiplier circuit is used for carrying out frequency multiplication processing on the voltage signal. The signal processing circuit connected to the frequency multiplier unit determines a conductivity of a to-be-tested medium according to a voltage signal processed by the frequency multiplier circuit. According to the technical scheme, on the premise that the testing electrode is prevented from being polarized, a conductivity of a to-be-tested medium is tested accurately.

Description

technical field [0001] The invention relates to the technical field of conductivity testing, in particular to a conductivity testing device and electrical equipment. Background technique [0002] As one of the important characteristics of substances, conductivity is widely used in material classification technology, material analysis technology, environmental protection technology and industrial production control technology because of its simple detection principle and low cost of detection devices. [0003] In the related art, the detection of conductivity is usually analyzed by using the volt-ampere characteristic curve. Specifically, a voltage signal is applied to the test electrode as an excitation signal, and the current signal flowing through the test electrode is read. According to the above-mentioned voltage signal and current signal Determine the conductivity of the analyte. However, if the DC voltage signal is used as the DC excitation signal, it will cause the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08
Inventor 孟凡马志海王新元伍世润何新华张建亮陈逸凡
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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