Small particle size seed flow sequence sensor device

Abstract

The invention belongs to the technical field of agricultural seed particle detection sensing, and specifically relates to a piezoelectric small-particle-size seed flow sequence sensing device. The sensing device comprises a seed inlet, a guide pipe, a slope collision piezoelectric elastic piece, a collision cavity, a collision seed outlet, a signal processing circuit, a power supply unit, and an encapsulation shell. The seed flow at the seed throwing opening of a small-particle-size precision seed-metering device flows through the guide pipe of the sensing device, hits the slope collision piezoelectric elastic piece and then flows out of the collision seed outlet, and thus, digitization of the seed flow is realized. An impact signal produced when the seed flow hits the piezoelectric elastic piece is amplified, shaped and single-pulsed (digitized) through the signal processing circuit to form a seed-metering pulse sequence corresponding to a seed-metering seed flow sequence, and technical support can be provided for later seed-metering performance test of a small-particle-size seed (such as rape seeds) precision seed-metering device. The device provided by the invention has excellent economic practicability and precision reliability, and is of important application value to real-time monitoring of seeding of a small-particle-size seed precision direct seeder.

Description

technical field [0001] The invention belongs to the technical field of detection and sensing of agricultural seed particles, and in particular relates to a small-diameter seed flow sequence sensing device. Background technique [0002] Seeding operation, as a key link in the agricultural production process, must provide a good foundation for crop growth and development according to the requirements of agricultural sowing technology, and the precision combined direct seeding machine is an important technology to achieve precision seeding, and the precision seed metering device is used as a precision direct seeding machine. It is a key part of the planter. When the seeder lacks seeds in the seed box, the hole of the seeding disc is blocked, and the transmission mechanism of the seeder is faulty, etc., it will cause missed seeding. Therefore, in order to improve the quality of sowing operations and achieve precise sowing, many scholars at home and abroad have installed operatio...

AI Technical Summary

Problems solved by technology

Although this method is intuitive and easy to operate for the detection of small particle size seed flow, but the environmental pollution is relatively large, manual detection is time-consuming and has large errors, so this detection method is gradually eliminated

[0005] Many researchers at home and abroad use computer vision technology to replace manual detection. This method is very effective for bench tests in laboratory environments. However, the computer vision system has strict requirements for the environment and relatively high equipment costs, making it difficult to achieve field sowing conditions. detection

[0006] Relevant researchers use fiber optic sensors to effectively detect the seed flow at the seeding port of the small particle size precision metering device. Widespread application of diameter seed sensor

[0007] To sum up, the computer vision detection method and the optical fiber sensor detection method used in the existing technology for seed flow detection have high costs and technical defects that are not suitable for popularization and application.

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