A kind of corn kernel cleaning loss monitoring system and method

Abstract

The invention relates to a system and method for monitoring the loss of corn grain cleaning. The system includes a piezoelectric film detection device, a charge-to-voltage amplification module, a 16-bit ADC, a data processing single-chip microcomputer, a wireless transmission module, a data receiving single-chip microcomputer and a remote PC; The electric film detection device, the charge-to-voltage amplification module, the 16-bit ADC, the data processing single-chip microcomputer, and the wireless transmission module are sequentially connected and fixed on the detection substrate, and the detection substrate is set at the trash discharge port of the corn harvester, so that the The discharged material can strike the piezo film detection device. The present invention adopts the Kalman filtering algorithm, and modulates the impact signal obtained by the sensing unit through a large sample test, thereby determining the threshold for distinguishing the impact force of the grain and the residue on the sensing unit, ensuring the real-time and stability of the data transmission of the monitoring system sex.

Description

technical field [0001] The invention belongs to the technical field of agricultural equipment, and in particular relates to a monitoring system and method for corn grain cleaning loss. Background technique [0002] Corn is one of the three major food crops in my country. Compared with wheat and rice, its mechanized harvesting technology started relatively late. The functions of the corn harvester are not perfect, and the quality needs to be improved. The problem of high loss rate in the cleaning process has become an important factor restricting the development of corn harvesters in my country. According to the information and statistics of the agricultural machinery production management department of the Ministry of Agriculture, the area of ​​corn mechanized planting bases in the country reached 37.89 million hectares in 2015. In 2015, the mechanized harvesting level of corn in China has reached 62.78%. Compared with the mechanized harvesting level of 94.56%, there is stil...

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Problems solved by technology

However, the process of direct harvesting of kernels is usually accompanied by problems such as cleaning loss, especially in the case of high moisture content, and there is a high rate of loss of kernels in the process of direct harvesting of corn

[0003] For example, the Chinese invention patent application "A Grain Harvester Grain Loss Detection Method and System" (public number CN110622684A), by constructing the grain content model in the straw, calculating the separation coefficient of the stepper, and installing two sets of PVDF piezoelectric elements on the stepper The film detects the impact frequency of grain loss, and then calculates the grain loss rate. This detection method is suitable for the detection of small grains such as wheat and rice. However, the grain content model is prone to calculation deviation due to too small grains, and it does not mention the distinction between grains and residues method, not suitable for maize kernel loss detection

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