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Method for detecting water content of material by monopolar antenna impedance

A monopole antenna, impedance detection technology, applied in the direction of using microwaves to test moisture content, etc., can solve the problems of high cost and strict manufacturing requirements for detection equipment

Inactive Publication Date: 2005-05-11
汤雷
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the manufacturing requirements of its testing equipment are strict and the cost is high.

Method used

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  • Method for detecting water content of material by monopolar antenna impedance
  • Method for detecting water content of material by monopolar antenna impedance

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Embodiment Construction

[0017] An example of using the method of the present invention to detect moisture content in kerosene.

[0018] (1) Calibration

[0019] The detection device is specifically: the container containing kerosene is a plastic barrel with a diameter of 30cm and a height of 30cm, the substance to be tested is kerosene, the monopole antenna is a steel wire with a diameter of 0.5mm and a length of 120.0mm, the feeder is a 50Ω shielded cable, and a digital power meter. 50Ω connection shielded cable, and 5.5w, 430MHz solid-state microwave source.

[0020] according to figure 1 Connect according to the connection relationship shown; then put the antenna into the kerosene, the antenna is in the center of the plastic bucket, and the distance between the two ends of the antenna is 10.0cm from the top and bottom of the kerosene; start the microwave source; read the positive value on the digital power meter The reverse power is converted to the voltage standing wave ratio. The initial wate...

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Abstract

A method utilizing impedance of single pole antenna to detect water content in material includes setting single pole antenna into material with Known water content, measuring voltage standing wave ratio of it, increasing water content and measuring out relation curve of voltage standing wave ratio to water content, using the same method to measure out unknown water content in material by measuring antenna standing wave ratio under the same condition, calculation out water content according to relation curve.

Description

[0001] Field: [0002] The invention relates to a method for detecting the water content of a material by using the impedance of a monopole antenna. Background technique: [0003] There is no method to detect the moisture content of a material by using the impedance of a monopole antenna. It is related to the detection of the moisture content of a material by using the sensitivity of microwaves to moisture. [0004] There are two methods for detecting the moisture content of a substance by using the sensitivity of microwaves to moisture, namely the transmitted wave method and the reflected wave method. The so-called transmitted wave method is to let the microwave pass through the measured substance, use the receiver to detect the phase and intensity of the transmitted wave, and analyze the moisture content of the measured substance accordingly. The so-called reflected wave method is to detect the intensity of the reflected wave of the first interface of the measured substance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/04
Inventor 汤雷
Owner 汤雷
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