Cotton flow sensor

Abstract

The invention discloses a cotton flow sensor. The sensor mainly consists of a transmitter and a receiver, wherein a transmitter circuit comprises an LED (Light Emitting Diode) drive circuit and a power supply circuit; a receiver circuit comprises a light frequency conversion circuit, a central processing circuit, a CAN (Control Area Network) communication circuit and a serial port circuit. When cotton passes through a cotton conveying pipeline, the intensity of light, transmitted from the transmitter, received by the receiver can be weakened; the flow of mass instantaneously passing through the cotton conveying pipeline can be indirectly measured through measuring the intensity of the received light; in a receiving circuit of a receiving terminal, a light frequency conversion chip, which plays a key role, can convert light intensity signals into electrical signals, and the output electrical signals are calculated by the central processing circuit, thereby obtaining a final measured value.

Description

technical field [0001] The invention relates to a flow sensor, in particular to a cotton flow sensor based on an optical principle. The non-contact flow sensor is used to measure the instantaneous mass flow of cotton passing through a cotton delivery pipeline of a cotton picker in real time. Background technique [0002] The cotton flow sensor is a device developed by developed countries in the 1990s and used in precision agricultural research. The flow sensor is the core component of the entire yield detection system, its stability and accuracy directly determine the accuracy of the cotton field yield, and at the same time affect the accuracy of the entire yield detection system. There are mainly three types of flow sensors used in cotton measurement in my country: one is direct measurement, which is directly measured through the measuring container suspended in the cotton box. Although this method is simple, it affects the loading capacity of the cotton box and the f...

AI Technical Summary

Problems solved by technology

There are mainly three types of flow sensors used in cotton measurement in my country: one is direct measurement, which is directly measured through the measuring container suspended in the cotton box. Although this method is simple, it affects the loading capacity of the cotton box and the flexibility of the cotton picker; The cotton output is measured by the sound of the seed cotton flowing through the cotton pipe to the cotton box. This method is susceptible to external interference during the operation of the cotton picker, which affects the accuracy of the data; the third is to purchase finished sensors from foreign companies. It is expensive to measure, and generally only a pair of sensors are installed on the cotton pipeline, and the single measurement direction reduces the accuracy of its production measurement

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