Resistance type grain moisture tester

A resistive, grain technology, applied in the direction of material analysis, instruments, and measuring devices by electromagnetic means, can solve problems such as poor anti-interference ability, poor accuracy, and difficulty in sampling, and achieve strong anti-interference ability, low cost, and accuracy. The effect of measurement

Inactive Publication Date: 2016-11-09
CHENGDU HANKANG INFORMATION IND
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to improve the measurement accuracy of the resistive grain moisture meter, and the purpose

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  • Resistance type grain moisture tester

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Embodiment 1

[0022] Such as figure 1 as shown, figure 1 It is a structural block diagram of the resistive grain moisture meter provided by Embodiment 1 of the present invention.

[0023] The resistive grain moisture analyzer includes a sampling unit, a micro control unit, a drive unit, a communication unit, an input unit and a display unit.

[0024] The sampling unit collects grain temperature values ​​and resistance values, and specifically includes a temperature sensor, a sampling resistor and a signal conditioning unit. Wherein, the sampling resistor is connected to the micro control unit through the signal conditioning unit, and the temperature sensor is directly connected to the micro control unit. The temperature sensor adopts the single-bus device DS18820 of DALLAS Company, which is used to compensate the influence of the ambient temperature on the internal moisture of the grain. The ambient temperature is directly transmitted in the digital mode of "one-line bus", which saves the...

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Abstract

The invention discloses a resistance type grain moisture tester. The resistance type grain moisture tester comprises a temperature sensor, a sampling resistor, a signal conditioning unit, a micro-control unit, a driving unit, a communication unit, an input unit and a display unit. The resistance type grain moisture tester acquires a resistance value of grain through the sampling resistor, the resistance value is compared to a corresponding relation of preset moisture resistance of the micro-control unit to obtain a grain moisture measurement initial numerical value, meanwhile, the temperature sensor acquires a temperature numerical value of the grain, the temperature numerical value is transmitted to the micro-control unit to correct the grain moisture measurement initial numerical value so as to obtain a grain moisture measurement final numerical value, and therefore, grain moisture is measured accurately in real time. The resistance type grain moisture tester has the characteristics of high anti-interference capability, simple circuit structure and low cost.

Description

technical field [0001] The invention relates to the field of grain moisture detection, in particular to a resistive grain moisture tester. Background technique [0002] Normal grains contain an appropriate amount of moisture, and the moisture content is usually kept within a certain range, which is necessary for the grain to maintain life and maintain its inherent quality and edible quality. Due to the impact of harvest time, maturity and climatic conditions, the moisture content of grain is a variable value. Grain moisture content is an important indicator for evaluating grain quality and one of the basic items of grain testing. The grain moisture testing methods are divided into: resistance method, capacitance method, neutron method, microwave method, infrared method, nuclear magnetic resonance method, etc. . Among them, considering the characteristics of the material object, the infrared method is mainly used for surface moisture measurement, which is more common in pap...

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/12G01N27/048
Inventor 陈静柴军
Owner CHENGDU HANKANG INFORMATION IND
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