Method and system for online detection of moisture content in grain piles

A detection system and detection method technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of microwave power, amplitude value changes, grain density changes, grain relative permittivity, dielectric loss angle differences, etc. problem, to achieve the effect of improving work efficiency

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A detection system and detection method technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of microwave power, amplitude value changes, grain density changes, grain relative permittivity, dielectric loss angle differences, etc. problem, to achieve the effect of improving work efficiency

CN107389746BActive Publication Date: 2020-05-19ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION +1

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[0031] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0032] The on-line detection method of the grain heap moisture content disclosed by the present invention substitutes the output voltage value of the moisture sensor placed in the grain heap into the linear equation of the grain heap moisture content, calculates the grain heap moisture content represented by the wet basis, and the grain heap moisture content is linear The equation is:

[0033] dsf=dStdWater+(iVol-dStdVol) / α

[0034] Among them, dsf is the moisture content of the grain pile, dStdWater is the nominal moistu...

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Abstract

The invention discloses a method and a system for detecting the water content of a grain stack on line. The system comprises a data processor and a water sensor placed in the grain stack; and the data processor substitutes an output voltage value of the water sensor into a grain stack water content linear equation, and the grain stack water content expressed by wet basis is obtained through calculation. According to the system and the method, the water content of the grain stack can be detected on line, so that the ventilation efficiency can be improved in intelligent mechanical ventilation, the migration condition of the water in the grain stack along with the season change can be mastered accurately, and technological support is provided for scientific ventilation decision.

Description

technical field [0001] The invention relates to the technical field of grain storage in the food industry. More specifically, it relates to an online detection method and system for the moisture content of grain piles. Background technique [0002] Grain moisture content affects the physical, chemical and biological properties of grain, and is one of the key indicators to regulate grain storage and processing quality. Grain storage is mainly to inhibit the growth of insects and mites, prevent mildew, maintain grain activity, and delay quality deterioration by regulating temperature and moisture content. The moisture content of grain piles is one of the important parameters and indicators for grain situation monitoring and mechanical ventilation operation of grain piles. It is usually tested manually after sampling, which has poor real-time performance. However, the online, automatic and non-manual detection of moisture content in grain piles is an automatic method for the m...

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Application Information

Patent Timeline

19 May 2020

Publication

CN107389746B

IPC: G01N27/22

CPC: G01N27/223

Inventors: 李兴军; 吴晓明