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Electronic type pulse width modulation (PWM) intermittence spray type variable spraying controller

A spraying and electronic technology, applied in the field of variable spraying controllers, can solve the problems of poor uniformity of deposition distribution, complicated operation, high cost, etc., and achieve the effect of simple structure, uniform droplet distribution, and offsetting hydraulic shock

Active Publication Date: 2013-06-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PWM signal in this controller can only be output in the same phase, and the uniformity of the deposition distribution is relatively poor, and it is prone to leakage.
The controller uses an intelligent chip, the cost is high, the operation is complicated, and the operator needs to have certain computer knowledge

Method used

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  • Electronic type pulse width modulation (PWM) intermittence spray type variable spraying controller
  • Electronic type pulse width modulation (PWM) intermittence spray type variable spraying controller
  • Electronic type pulse width modulation (PWM) intermittence spray type variable spraying controller

Examples

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Embodiment Construction

[0018] Further illustrate the utility model below in conjunction with accompanying drawing and embodiment.

[0019] Such as figure 1 As shown, this electronic PWM intermittent spray variable spray controller consists of an electronic PWM intermittent spray variable spray controller, mainly composed of pipeline subsystems, power supply 1, control panel 4, PWM signal generator, pressure Composition of the stability control subsystem.

[0020] The pipeline subsystem is composed of liquid medicine tank 26, filter 21, liquid pump 22, proportional overflow valve 23, high-speed switch solenoid valve A24, high-speed switch solenoid valve B25, nozzle A27, nozzle B28, filter 21, liquid pump 22, The proportional overflow valve 23 is located on the main pipe of the spray boom. The filter 21 and the proportional overflow valve 23 are connected through the liquid pump 22. The high-speed switching solenoid valve A24 and the high-speed switching solenoid valve B25 are placed in serie...

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PUM

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Abstract

The invention discloses an electronic type pulse width modulation (PWM) intermittence spray type variable spraying controller. The controller is composed of a power source, a control panel, a PWM signal generator, a phase inverter, an electromagnetic valve drive circuit, electromagnetic valves, a proportional overflow valve and a proportional overflow valve control circuit. The electromagnetic valves are placed in front end pipelines of all spray heads in series. One end of the proportional overflow valve is connected with a spray rod main pipeline, and the other end of the proportional overflow valve is connected with a liquid medicine jar. The PWM signal generator can output multichannel PWM signals which are same in frequency, and independent and adjustable in duty ratio, and the frequency and the duty ratio can be adjusted through rotary knobs on the control panel. The proportional overflow valve control circuit adjusts the opening height of the proportional overflow valve according to set spray pressure, machine set operating speed and the total number of electromagnetic valves which are opened at present, and keeps system spray pressure stable. The controller is convenient to use, and can be used for controlling application dosages of a spray rod type spraying machine due to the fact that a driver can adjust the spray pressure and application dosages of each spray head on line through the rotary knobs on the control panel.

Description

technical field [0001] The invention belongs to the field of agricultural plant protection machinery, and in particular relates to a variable-variable spraying controller. Background technique [0002] Variable spraying means that the pesticide equipment prepares to spray the required amount of pesticides to the disaster-stricken area according to the specific conditions of crop diseases, insect pests and weeds in each small area of ​​the farmland, and sprays pesticides on demand according to the specific conditions of each area. Variable-variable spraying control mainly has three realization methods: variable pressure type, variable injection type of pesticide stock solution and PWM (pulse width modulation) type. Among them, the variable pressure type realizes the change of the spray flow rate by adjusting the spray pressure; the variable injection type of the pesticide stock solution realizes the adjustment of the actual pesticide application amount by injecting different ...

Claims

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Application Information

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IPC IPC(8): G05B19/418A01M7/00
Inventor 魏新华李玫瑾
Owner JIANGSU UNIV
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