PWM intermittent spray variable spraying system characteristic test bench

Abstract

The invention discloses a PWM intermittent spray type variable spraying system characteristic test bench, which is composed of a measurement and control system and a pipeline system. The measurement and control system includes industrial computer, signal conditioning unit, power output module and amplifier. The pipeline system includes diaphragm pump liquid supply device, electronically controlled overflow device, multiple variable spraying units, constant pressure liquid supply branch, constant pressure outlet branch, solenoid valve dynamic characteristic test unit and multi-source pressure fluctuation coupling characteristic test Unit, and set a number of transparent pipeline sections and pressure sensors on the connecting pipeline between the outlet of the diaphragm pump, the inlet of the proportional relief valve, the inlet and outlet of the solenoid valve, the main pipeline and the solenoid valve, so as to use the high-speed image acquisition system or the flow field test system Test the flow field characteristics inside the pipeline and monitor the pressure. The invention can be applied to test the pressure pulsation characteristics of a diaphragm pump, the dynamic characteristics of a proportional overflow valve, the dynamic characteristics of an electromagnetic valve and the propagation characteristics of multi-source pressure fluctuations in pipelines in a PWM intermittent spray type variable spraying system.

Description

technical field [0001] The invention relates to a characteristic test bench of a PWM intermittent spray type variable spraying system, which belongs to the field of characteristic testing and optimal design of agricultural equipment, in particular to the field of characteristic testing and optimal design of variable-variable spraying machines. Background technique [0002] In order to improve the effective utilization rate of pesticides, reduce the loss of pesticides, and improve the control effect, pesticide spraying equipment should spray the required amount of pesticides evenly and accurately to the affected areas according to the specific conditions of crop diseases, insect pests and weeds in each small area of ​​the farmland. That is, the variable is sprayed on the target. Variable target spraying can realize the low-pollution and high-efficiency utilization of pesticides, and it is an important development direction of plant protection machinery and pesticide applicati...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the existing PWM intermittent spray type variable spraying test system cannot test the internal flow field of the pipeline, the present invention provides a PWM intermittent spray type variable spray system characteristic test bench, which can realize the outlet pipeline of the diaphragm pump, the proportional overflow The internal flow field test and pressure monitoring of the inlet pipeline of the flow valve and the inlet and outlet pipeline of the solenoid valve, etc., so as to lay the test foundation for the characteristic test, performance optimization and reasonable matching of each hydraulic component in the PWM intermittent spray variable spraying system

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