A segmented pesticide spray volume distribution uniformity test system and test method

Abstract

The invention relates to a system and a method for testing distribution uniformity of sectional pesticide mist spraying quantity and belongs to the technical field of agricultural machinery. The system comprises a mist collection device, wherein a servo motor used for driving a guide wheel is arranged at the bottom of the mist collection device; the mist collection device comprises mist collection tanks at the bottoms of a group of funnels arranged along a guide direction; mist collection test tubes are arranged at the lowest parts of the bottoms of the funnels; electromagnetic valves are arranged at the bottoms of the mist collection test tubes; triggering sensors are mounted at the lower parts of the mist collection test tubes; liquid level sensors are mounted at a predetermined height; signal output ends of the triggering sensors and the liquid level sensors are connected to collection signal input ends of a control computer; the corresponding control output ends of the control computer are connected to the controlled ends of the servo motor and the electromagnetic valves respectively. Because of the adoption of the system and the method for testing distribution uniformity of sectional pesticide mist spraying quantity, dynamic real-time measurement in each sampling zone is achieved; meanwhile, the test errors can be effectively controlled; the system is very convenient to debug, calibrate and maintain, so that the efficiency is greatly improved while the test accuracy is effectively ensured.

Description

technical field [0001] The invention relates to a computer-controlled testing device, in particular to a segmented pesticide spray volume distribution uniformity testing system, and also relates to a testing method using the system, which belongs to the technical field of agricultural testing. Background technique [0002] According to the applicant's knowledge, the annual area of ​​agricultural diseases, insect pests and weeds in my country is more than 400 million hectares, and the annual use of formulated pesticides exceeds 1.5 million tons. However, the pesticide application technology and equipment are backward, and the effective utilization rate of pesticides is only about 30%. A large amount of pesticides are lost to the soil, water, air, or remain in agricultural products, seriously affecting environmental safety, agricultural product quality and safety, and national health. . [0003] The uniformity of pesticide spray volume distribution is one of the key factors d...

AI Technical Summary

Problems solved by technology

Such methods not only have low test efficiency, but also have large measurement errors and difficult to guarantee test accuracy.

Specifically, the determination of the spray volume distribution characteristics requires synchronous collection of the spray volume distribution parameters of the full range of the spray gun (or the full spray width of the spray bar), and the length (measurement range) of the fixed fog collection tank of the required test system needs to be It is longer than the farthest range of the spray gun (or the maximum spray width of the spray boom), and usually needs 20m~30m to meet the test requirements of long-range spray guns and large boom sprayers. It not only occupies a large area, but also requires maintenance and calibration of the spray tank very complicated

In addition, the existing test of the distribution characteristics of the mist volume adopts the method of directly measuring the mass or volume of the mist droplets collected by each flow channel of the mist collecting tank within the same time period, that is, after the spraying part under test has been sprayed for a certain period of time and stopped, the method of using a balance or The measuring cylinder manually measures the mass or volume of the droplets collected by each flow channel of the mist collecting tank in turn, or uses a bridge-type load cell to measure, which not only has a low degree of automation, but also has difficulty in ensuring measurement accuracy. The stability, reliability and reliability of the measurement The accuracy is poor, and it is often necessary to calibrate them one by one, which greatly increases the difficulty of debugging and maintenance of the test system and reduces the test efficiency

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