An electrical characteristic detection method and device for contact with low-temperature condensate

Abstract

The invention discloses an electrical characteristic detection method and device for contacting low-temperature condensable matter. The detection method includes the following steps: analyzing and calculating to obtain the parasitic capacitance C P ; Measure the measured substance with condensable substances to obtain a new measurement capacitance; combine the new measurement capacitance with the parasitic capacitance C P , to obtain the actual measured capacitance; analyze and calculate the mass of easily condensed matter; analyze and calculate to obtain the required heating heat Q and the time t required to melt easily condensed matter. Beneficial effects: not only effectively solves the current problem of increased signal noise when the transmitting and receiving antennas that contain low-temperature condensable substances have condensable substances on the surface, but also effectively solves the problem of low-temperature condensable substances on the surface of the electrical characteristic sensor When the electrical characteristics are affected, it effectively solves the problem of the influence of surface condensate on the electrical characteristic detection results.

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 use scenarios are greatly limited. [0003] For example, the antenna used for signal transmission and reception, when dealing with precise signals, if the surface is polluted by condensate or other dirt, it will inevitably increase the signal noise and affect the accuracy of the signal. Therefore, this problem is encountered in the prior art In some cases, the antenna must be cleaned regularly, which takes a lot of manpower and material resources. [0004] Another example is the sens...

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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 use scenarios are greatly limited

[0003] For example, the antenna used for signal transmission and reception, when dealing with precise signals, if the surface is polluted by condensate or other dirt, it will inevitably increase the signal noise and affect the accuracy of the signal. Therefore, this problem is encountered in the prior art In some cases, the antenna must be cleaned regularly, which will cost a lot of manpower and material resources

[0004] Another example is the sensor used to detect electrical characteristics. If the substance to be detected contains low-temperature condensable substances, when the temperature drops or changes in physical conditions cause 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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