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Single-valve pulse width modulation controller for large-scale variable sprinkling irrigation machine

A pulse width modulation, sprinkler irrigation technology, applied in computer control, general control system, program control and other directions, can solve the problem that PWM independent control cannot use centralized multi-channel flow PWM control, etc., to reduce the real-time communication requirements, reduce Small external power supply requirements, reducing the effect of control tasks

Active Publication Date: 2019-08-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-scale variable sprinkling irrigation machine
  • Single-valve pulse width modulation controller for large-scale variable sprinkling irrigation machine
  • Single-valve pulse width modulation controller for large-scale variable sprinkling irrigation machine

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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 sprinkling irrigation machine. The single-valve pulse width modulation controller comprises a power converter (1), an MAX485 chip (2), an STC15 single-chip microcomputer (3) and a solid-state relay (4); the power converter (1) is connected with the MAX485 chip (2) and the STC15 single-chip microcomputer (3) separately; 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). By virtue of485 bus control, the multi-water valve and long-distance requirements of the sprinkling irrigation machine are met; and in addition, PWM pulse is generated independently, so that the control tasks ofthe main controller of the sprinkling irrigation machine are reduced, and the communication instantaneity requirements of the whole system are lowered.

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 Applications(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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