Electrical characteristic detection method and device for contacting low-temperature easily-coagulated object

Abstract

The invention discloses an electrical characteristic detection method and device for contacting a low-temperature easy-to-condense object. The detection method comprises the following steps: analyzing and calculating to obtain parasitic capacitance CP; measuring the measured substance with the condensate or the scale to obtain a new measuring capacitance; combining the new measuring capacitance with the parasitic capacitance CP to obtain actually measured measuring capacitance; analyzing and calculating to obtain the mass of the condensate; and analyzing and calculating to obtain the required heating heat Q and the time t required for melting the condensate. The beneficial effects are that the problem that the signal noise is increased when the surface of the transmitting and receiving antenna containing the low-temperature condensate has the condensate at present is effectively solved, and the problem that the electrical characteristics are influenced when the surface of the electrical characteristic sensor has the low-temperature condensate is also effectively solved; and the problem that the surface condensate affects the electrical characteristic detection result is effectively solved.

Description

technical field [0001] The invention relates to the technical field of electrical characteristic detection, in particular to an electrical characteristic detection method and device for contacting low-temperature easily condensed matter. Background technique [0002] As a common sensor, the electrical characteristic sensor has a wide range of applications in many aspects. But for the measurement of some impure substances, or the measurement of those substances that are prone to condensate, the usage scenarios are greatly limited. [0003] For example, the antenna used for signal transmission and reception, when processing precision signals, if the surface is polluted by condensate or other dirt, it will inevitably increase signal noise and affect the accuracy of the signal. Therefore, this situation is encountered in the prior art , it is necessary to regularly clean the antenna, which takes a lot of manpower and material resources. [0004] For another example, if the sen...

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Problems solved by technology

But for the measurement of some impure substances, or the measurement of those substances that are prone to condensate, the usage scenarios are greatly limited

[0003] For example, the antenna used for signal transmission and reception, when processing precision signals, if the surface is polluted by condensate or other dirt, it will inevitably increase signal noise and affect the accuracy of the signal. Therefore, this situation is encountered in the prior art , it is necessary to regularly clean the antenna, which takes a lot of manpower and material resources

[0004] For another example, if the sensor used to detect electrical characteristics contains low-temperature condensable substances in the detected substance, when the temperature drops or the change in physical conditions causes the crystal to crystallize, it will inevitably lead to a sudden change in the electrical characteristics. Taking the capacitive sensor as an example, there are Sometimes the maximum deviation will reach about 20%. At present, in such a situation, the sensor must be cleaned regularly, or a complex mechanism must be added to clean the surface of the sensor, which makes the whole device extremely complicated and not easy to maintain; In addition, the general environment has explosion-proof requirements. After the auxiliary cleaning device increases the explosion-proof requirements, the volume and cost of the equipment will increase rapidly. In some scenes with small spaces, the electrical characteristic sensor will lose its use at all.

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