Single-plate impulse type grain flow sensor

Abstract

The invention provides a single-plate impulse type grain flow sensor, which comprises an installing plate, a guide plate, a sensor support frame, a separation plate and an impact plate, wherein the guide plate is fixedly connected onto the installing plate, the separation plate is arranged in a way of being tightly attached to the impact plate, and the top end of the separation plate is connected with the sensor support frame. The single-plate impulse type grain flow sensor is characterized by also comprising a shock absorption pad and a force sensitive element, the shock absorption pad is arranged on the sensor support frame, the force sensitive element is arranged on the upper surface of the separation plate, the installing plate is in a triangular shape, and the rest elements are respectively arranged in the installing plate. The shock absorption pad is additionally arranged on the sensor support frame, meanwhile, the installing plate is designed into the triangular shape, and the anti-shock performance of the grain flow sensor is enhanced; better dustproof performance is ensured through the installing plate, and the dismounting, the mounting and the maintenance are convenient; the impact force is directly converted into flow signals through the force sensitive element, the signal conversion is realized in one step, the precision and the accuracy are improved, and the influence of grain flow changes on measurement errors is reduced.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery, in particular to a grain flow sensor. Background technique [0002] Impulse flow sensor is a sensor for measuring grain mass flow. The sensor is installed on the combine harvester. When the impact velocity of the grain is known, the real-time measurement of grain quality can be realized by measuring the change of momentum before and after the impact of the grain. It is an essential tool for accurate measurement of grain yield distribution information. Since the grain flow sensor is generally carried out with the combine harvester in the field operation, the field operation is greatly affected by the geographical environment and the season, so the grain flow sensor needs to have high shock resistance and dustproof performance, and the existing grain flow sensor is generally set by setting The protective shell outside the sensor enhances its shock resistance and dustproof performanc...

AI Technical Summary

Problems solved by technology

Since the grain flow sensor is generally carried out with the combine harvester in the field operation, the field operation is greatly affected by the geographical environment and the season, so the grain flow sensor needs to have high shock resistance and dustproof performance, and the existing grain flow sensor is generally set by setting The protective shell outside the sensor enhances its shock resistance and dustproof performance, thus increasing the assembly process of the flow sensor, and it is troublesome to disassemble and maintain.

In addition, most of the existing grain flow sensors use amplifiers to realize signal transmission. This measurement method has a large measurement error when the grain flow varies greatly.

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