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Single-Valve Pulse Width Modulation Controller for Large Variable Variable Sprinkler

A technology of pulse width modulation and sprinkler irrigation, applied in computer control, general control system, program control, etc., can solve the problem that independent PWM control cannot adopt centralized multi-channel flow PWM control, etc., to reduce the real-time requirements of communication, overall Small size, avoid loss and deformation effect

Active Publication Date: 2021-02-12
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the PWM independent control of many water valves of large sprinkler irrigation machines cannot be controlled by centralized multi-channel flow PWM control similar to spraying machines.

Method used

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  • Single-Valve Pulse Width Modulation Controller for Large Variable Variable Sprinkler
  • Single-Valve Pulse Width Modulation Controller for Large Variable Variable Sprinkler
  • Single-Valve Pulse Width Modulation Controller for Large Variable Variable Sprinkler

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0047] A single-valve pulse width modulation controller for a large-scale variable sprinkler irrigation machine provided according to the present invention includes:

[0048] Power converter, MAX485 chip, STC15 microcontroller and solid state relay;

[0049] The power converter is respectively connected with the MAX485 chip and the STC15 single-chip microcomputer, the MAX485 chip is connected with the STC15 single-chip microcomputer, and the STC15 single-chip microcomputer is connected with the solid-st...

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Abstract

The invention provides a single-valve pulse width modulation controller for a large-scale variable sprinkler irrigation machine, comprising: a power converter (1), a MAX485 chip (2), an STC15 single-chip microcomputer (3) and a solid-state relay (4); The power converter (1) is respectively connected with the MAX485 chip (2) and the STC15 single-chip microcomputer (3), the MAX485 chip (2) is connected with the STC15 single-chip microcomputer (3), and the STC15 single-chip microcomputer (3) is connected with the solid-state relay (4). The 485 bus control of the present invention meets the requirement of multiple water valves and long distances of the sprinkler irrigation machine, and the independent generation of PWM pulses of the present invention reduces the control task of the main controller of the sprinkler irrigation machine and reduces the real-time communication requirements of the entire system.

Description

technical field [0001] The invention relates to the technical field of modern agriculture, in particular to a single-valve controller for a large-scale variable-variable sprinkling irrigation machine controlled by independent pulse width modulation of each valve. Background technique [0002] With the help of pulse width modulation (PWM) variable function, the large variable pivot can realize the on-demand irrigation along the direction of the truss. PWM variable sprinkler irrigation refers to the installation of water valves in front of each sprinkler head of the sprinkler irrigation machine, and the precise control of the irrigation volume is realized by adjusting the duty ratio of the water valves in an opening and closing cycle. At present, the variable sprinkling irrigation of large sprinklers adopts partition variable control, that is, each water valve in a partition is a fluid control valve, and is uniformly piloted by an electromagnetic water valve controlled by a PW...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 李文涛黄小林陶帅莫锦秋
Owner SHANGHAI JIAO TONG UNIV
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