A device for detecting and calibrating the moisture content of wood
A calibration device, a technology for moisture content, applied in the direction of material resistance, weighing by removing a certain component, etc., can solve the problems of inaccurate moisture content detection, inability to measure, and inability to verify and calibrate the moisture content of wood. , to prevent the voltage from suddenly being too large, reduce the fluctuation of the voltage, and achieve the effect of accurate detection value
Inactive Publication Date: 2017-08-11
黑龙江省木材科学研究所 +1
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[0003] The invention solves the problem that the moisture content detection of the existing device is inaccurate, the measurement of the moisture content of wood at different temperatures for different tree species cannot be realized, and the problems that the moisture content of wood with different temperatures and different moisture content cannot be checked and calibrated are solved.
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[0024]The specific embodiment of the present invention is illustrated in conjunction with the accompanying drawings: the wood moisture content detection and verification device of the present embodiment includes a power supply, an induction part, a data processing part and a display screen, the induction part includes a probe and a temperature sensor, and the data processing part includes A water content detection circuit, a temperature detection circuit, an A / D conversion module, and a CPLD chip, the water content detection circuit includes a first detection terminal E1, a second detection terminal E2, a first triode T1, and a second triode T2 , the third transistor T3, the field effect transistor T4, the first potentiometer P1, the second potentiometer P2, the third potentiometer P3, the regulator D, the first resistor R1, the second resistor R2, the third resistor R3 , the first electrolytic capacitor C1, the second electrolytic capacitor C2, the first filter capacitor C3, t...
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The utility model relates to a wood moisture content detection and calibration device, which relates to a moisture content detection and calibration device. The invention solves the problem that the moisture content detection of the existing device is inaccurate, the measurement of the moisture content of wood at different temperatures for different tree species cannot be realized, and the problem of checking the moisture content of wood with different temperatures and different moisture content is solved. The present invention comprises sensing part, data processing part and display screen, sensing part comprises probe and temperature sensor, power supply, data processing part comprise moisture content detection circuit, temperature detection circuit, A / D conversion module, CPLD chip, moisture content detection The circuit includes a first detection terminal, a second detection terminal, a first triode, a second triode, a third triode, a field effect tube, a first potentiometer, a second potentiometer, a third potentiometer, a stabilizing A voltage regulator, a first resistor, a second resistor, a third resistor, a first electrolytic capacitor, a second electrolytic capacitor, a first filter capacitor, a second filter capacitor and an operational amplifier. The invention has simple structure and accurate detection result.
Description
technical field [0001] The invention relates to a moisture content detection and verification device, in particular to a wood moisture content detection and verification device, and belongs to the technical field of wood detection. Background technique [0002] At present, the most accurate detection method for the moisture content of wood is the absolute dry weighing method, which is the ratio of the total mass of moisture contained in the wood sample to the mass of the dry wood sample (weighing method). It is very inconvenient to use the weighing method to detect the moisture content of wood, so the resistance method (to detect the volume resistance of wood with different moisture content) is used to detect the moisture content of wood in the wood drying production process, while the existing resistance method for wood moisture content detection , only divides the wood into several categories according to the density for measurement, and does not accurately calibrate diffe...
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IPC IPC(8): G01N5/04G01N27/04
Inventor 何小东王子奕于大伟王子奇何金存张妍崔晓磊徐蕊赵眉芳
Owner 黑龙江省木材科学研究所