Adaptive measurement method and device for resistance type grain moisture meter big-measuring-range resistance value
A measuring device and technology of measuring method, which are applied in the field of large-range resistance value measurement and the self-adaptive measurement field of large-range resistance value of a resistive grain moisture meter, can solve the problems of insufficiently simple circuit design, complex data processing, weak anti-interference ability, etc. , to achieve the effect of simplified data processing, strong anti-interference ability, and stable resistance measurement
Inactive Publication Date: 2018-12-11
ANHUI UNIVERSITY OF ARCHITECTURE
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Problems solved by technology
Since the resistance value corresponding to grain moisture is as small as tens of ohms and as large as hundreds of megohms, it brings great difficulties to the resistance measurement
At present, no matter whether the resistive grain moisture meter adopts the Ohm's law method or the voltage division method, the circuit design is not simple enough, the data processing is too complicated, and the anti-interference ability is weak. Therefore, it is difficult to achieve a high range of resistance value Accuracy measurement
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[0035] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.
[0036] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0037] Such as figure 1 As shown, one embodiment of the present invention provides a resistance self-adaptive measuring device for the resistance grain moisture meter. Corresponding) and measurement output unit four parts.
[0038] in:
[0039] Multi-channel resistance: It is composed of multip...
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The invention discloses an adaptive measurement method and device for a resistance type grain moisture meter big-measuring-range resistance value, and belongs to the technical field of moisture detection in grain quality. The device comprises multiple paths of resistors, multiple paths of selection switches, a resistor to be measured, and a measurement output unit, wherein the multiple paths of resistors are formed by a plurality of alternative constant value resistors connected in a circuit in series; the multiple paths of selection switches are connected with the multiple paths of resistorsand are used for selecting a most proper resistor from the multiple paths of resistors to be connected to the circuit in series; the resistor to be measured corresponds to grain to be measured; the measurement output unit carries out output through an ADC (Analog-to-Digital Converter) output line. According to the adaptive measurement algorithm, a single resistor is selected from multiple paths ofresistors in sequence to be connected to the circuit in series, the value of the measurement output end is read, the effectiveness of the output value is determined according to the upper limit valueand the lower limit value set in advance, an effective value is used for calculating the resistor value corresponding to grain moisture and carrying out summation, and finally, an average resistancevalue is output. According to the technical scheme of the invention, the advantages of full-measurement-range high-accuracy measurement, high antijamming capability, stable resistance value measurement and the like can be realized.
Description
technical field [0001] The invention belongs to the technical field of moisture detection in grain quality, and relates to the measurement of large-range resistance values, in particular to an adaptive measurement method and device for large-range resistance values of resistive grain moisture meters. The adaptive algorithm realizes the adaptive measurement of the resistance value of the resistive grain moisture meter. Background technique [0002] Before the grain is put into the warehouse, it needs to go through the drying process, and the moisture can reach a certain requirement before it can be stored for a long time. The moisture meter commonly used in the grain drying process is a resistive online moisture meter, and the common methods of resistance measurement are Ohm's law and partial pressure measurement. Since the resistance value corresponding to grain moisture is as small as tens of ohms and as large as hundreds of megohms, it brings great difficulties to the m...
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IPC IPC(8): G01N27/04
CPCG01N27/043G01N27/048
Inventor 高先务程浩
Owner ANHUI UNIVERSITY OF ARCHITECTURE