Grain flow measurement device and method based on opposite laser emission type array sensors

Abstract

The invention discloses a grain flow measurement device and method based on opposite laser emission type array sensors. The grain flow measurement device comprises a sensor unit and a single chip microcomputer connected with the sensor unit, wherein the sensor unit comprises eight pairs of opposite laser emission type array sensors, a rotation speed sensor and a dip angle sensor; time consumed when grains shield the eight pairs of sensors from emitting light is calculated through a single chip microcomputer timer, and the volume of the grains in the operation process is calculated in combination with the rotation speed of a scraper; besides, the dip angle of an elevator scraper is measured by the aid of the dip angle sensor, and measurement errors caused by uneven ground are compensated; the grain density is input by means of a keyboard circuit, and the mass flow in unit time of the grains is calculated in combination with the calculated grain volume; the single chip microcomputer calculates grain flow information according to information measured by a sensor module and saves the grain flow information in a storage module, and the grain flow information is displayed in real time through a display. The device and the method can adapt to grain measurement in different environments, and non-contact precision measurement of the grain flow in the scraper of a scraper elevator is realized.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery measurement, in particular to a grain flow measurement device and method for a combine harvester. Background technique [0002] With the development of precision agriculture, through the study of farmland soil conditions and production benefits, soil productivity can be improved, and the input of farmland crops can be adjusted to achieve the same or higher benefits at the least cost. The grain flow monitoring device provides management data and decision-making basis for precision agriculture. During the operation of the combine harvester, the grain flow measurement is affected by high operating temperature, large vibration and noise, uneven surface of the paddy field and many interference factors of straw residues, and the sensor probe is easy to absorb dust. The device of grain flow is of great significance. [0003] Scholars at home and abroad have made many attempts on the meas...

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Problems solved by technology

[0008] Investigated photoelectric flow sensors at home and abroad. Foreign photoelectric flow measurement devices have not been made public in China due to technical protection, and their products cannot adapt to domestic combined harvesting machinery and complex operating environments; the measurement accuracy of domestic photoelectric flow measurement devices Low does not take into account the complex environment of farmland; published research mostly uses a single visible light or infrared emitter, and its probe is prone to dust accumulation that affects measurement accuracy

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