Design of Straw Moisture Detector based on AC Impedance Method
DOI:
https://doi.org/10.54097/j1rgqz83Keywords:
Impedance, Single-chip Microcomputer, DetectorAbstract
In this paper, a corn straw moisture detector with single-chip microcomputer as the core was designed based on the AC impedance method. The hardware uses the stm32 microcontroller as the controller, and the DDS sine wave generator generates a 100kHZ sinusoidal signal, converts the output constant current as the excitation signal through the constant current circuit, and then collects the ADC signal and the temperature signal. The software used FFT for detection, and the test data were fitted by least squares method. It is verified that the absolute measurement error of moisture content of the moisture detector designed in this paper is -2.0%~1.5%, and the response time is less than 1.5 s.
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[1] Ming Cui, Zhaoyuan Hui, Yanliang Wang, et al. Innovative structure and technical characteristics of a multi-functional general-purpose corn harvester product[J]. Agricultural Machinery, 2023, (07):56-57+60.
[2] Haiyan Liu, Peng Liu, Xiufei Wang, et al. Research progress on separation and comprehensive utilization of corn straw husk[J]. Heilongjiang Animal Husbandry and Veterinary Medicine, 2015,(13):63-64+67.
[3] Jun Yang. Design of wheat straw moisture content detector based on AC impedance method[D].Northwest A&F University, 2013.
[4] Shengquan Zhang. Method for determination of moisture content of resistive grain. Grain and Oil Processing and Food Machinery, (2): 66-66, 69.
[5] Wenchuan Guo, Jun Yang, Chi Liu, et al. Design of a Wheat Straw Moisture Content Detection Instrument Based on AC Impedance Method [J]. Transactions of the Chinese Society of Agricultural Engineering, 2013, 29(23): 46-52.
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