Device and method for monitoring impurity rate and breaking rate of grains in grain tank of combine harvester in real time

Abstract

The invention relates to a device and a method for monitoring the impurity rate and the breaking rate of grains in a grain tank of a combine harvester in real time. The device comprises a grain sampleextracting mechanism, an image acquisition device and a data processing and control device, part of the grain entering a granary enters a sampling hopper when a movable bottom plate of the sampling hopper is closed, a CCD video camera starts shooting and acquiring a still image of the grain in the sampling hopper on one side of the side wall of the granary after the grain fully fills the samplinghopper and the set upper limit of a pressure sensor is reached, the shot image is transmitted to the data processing and control device, after the data processing and control device acquires the image, the area of the impurity in the grains is calculated according to an image processing method, the broken grain is recognized, the acquired data are calculated to obtain the loss ratio and the impurity rate, and the process is sequentially circulated after the sampling hopper is filled with the grains and the set upper limit of the pressure sensor is reached. The device monitors the impurity rate and the breaking rate of the harvested grains in real time.

Description

technical field [0001] The invention relates to the field of design of working parameter feedback and operating performance monitoring devices of a combine harvester, in particular to a real-time monitoring device and method for the impurity content and broken rate of grains in an auger-type grain output ration box of a combine harvester. Background technique [0002] At this stage, the detection of broken rate of grain impurity content in my country generally stays in the manual method of separation and detection. This method is mainly based on subjective judgment, and manual sorting is cumbersome and has high repetition rate, large errors, long time-consuming, and low efficiency. Agricultural scientific research personnel have increased too much burden, but the result is not satisfactory. During the harvesting process, the combine harvester cannot obtain the current grain impurity content and crushing rate in the granary in real time, so the driver of the combine harvester ...

AI Technical Summary

Problems solved by technology

The two Chinese patents with the announcement numbers CN 203981597 U and CN 105806751 A, when the image is taken, the grains are in a state of motion, which is not conducive to obtaining a clear picture, which will bring great difficulty to the subsequent data collection and analysis ; There is no corresponding isolation measure between the image capture unit and the grain. Under actual working conditions, impurities such as dust, broken stalks, and rice husks will enter the image capture unit, which will affect the use effect and service life of the device. This increases the cost of equipment, which has a great impact on the popularization of agricultural mechanization and automation equipment; in addition, due to the needs of the above-mentioned patents for the steps of taking grain samples and putting grain, its device occupies a large part of the grain box of the machine. The large space ratio and height drop will lead to a great reduction in the actual amount of grain that can be accommodated in the grain tank, that is, the warning grain storage line in the grain tank must be lower than the grain opening of the monitoring device; one to monitor

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