Hose Reel Irrigator Pressure Control for Uniform Sprinkler Coverage
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Solution Overview
Problem
Existing sprinkler irrigation systems, such as hose reel irrigators with electric drive, face challenges in maintaining uniformity due to changes in nozzle inlet pressure caused by resistance loss in PE pipes, which current technologies fail to accurately control, leading to reduced irrigation efficiency and increased maintenance costs.
Innovation Solution
A wireless interconnection control system incorporating a microprocessor controller module, wireless data transmission module, pressure transmitter, and GPRS wireless transmission module, which measures and compensates for pressure loss in PE pipes to maintain constant nozzle inlet pressure by adjusting the water pump motor speed, using a pressure PID controller and dynamic pressure loss database established through testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pressure transmitter and wireless data transmission module are installed at nozzle inlet to directly control nozzle inlet pressure, then sprinkler irrigation uniformity is improved, but additional power consumption and system complexity increase
Solution Approach 1:
The patent uses incoming pressure as an intermediary parameter to indirectly control nozzle inlet pressure. Instead of directly measuring and controlling nozzle inlet pressure (which would require complex installation), the system measures incoming pressure at a more accessible location and uses this as a proxy to regulate the actual nozzle pressure, simplifying the overall system while maintaining irrigation uniformity
Solution Approach 2:
The patent replaces direct mechanical pressure control at the nozzle with an automated electronic control system using frequency converter and PID control. This substitution of mechanical control with electronic automation reduces the need for complex mechanical pressure regulation mechanisms at the nozzle location
2Measurement precision
If pressure transmitter is installed at nozzle inlet for direct control, then pressure control accuracy is improved, but power consumption and maintenance cost increase
Solution Approach 1:
The system uses the existing pressure measurement infrastructure (incoming pressure measurement) to serve the dual purpose of both monitoring incoming pressure and inferring nozzle inlet pressure conditions. This self-service approach eliminates the need for additional power-hungry pressure transmitters at the nozzle while still providing adequate pressure control
3Device complexity
If PE pipe resistance loss is not compensated, then system simplicity is maintained, but sprinkler irrigation uniformity deteriorates
Solution Approach 1:
The patent implements a feedback control system using PID (Proportional-Integral-Derivative) control to compensate for PE pipe resistance loss. The system continuously monitors incoming pressure and automatically adjusts pump frequency based on the feedback signal, dynamically compensating for variable resistance losses in the PE pipe while maintaining overall system simplicity through automated control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves sprinkler irrigation uniformity by maintaining constant nozzle inlet pressure, reducing equipment maintenance and agricultural irrigation costs, while enabling real-time monitoring and remote control of irrigation operations through a mobile phone client APP, ensuring efficient and uniform water distribution.
Implementation Method 1
pressure transmitter, which is connected to an input terminal of the microprocessor controller module; the incoming pressure of the hose reel irrigator is measured by the pressure transmitter
Implementation Method 2
brushless DC motor instead of the water turbine to realize the uniform recovery of the sprinkler cart
Implementation Method 3
The encoder for detecting the rotational speed of the brushless DC motor is mounted on the output shaft of the brushless DC motor
Implementation Method 4
frequency converter that controls the pump motor speed; STC singlechip module is connected to the frequency converter through the I/O port
Data Source
AI summary
The present invention provides a wireless interconnection control system for improving sprinkler irrigation uniformity of hose reel irrigator with electric drive comprising a micro processing controller module, a frequency converter, a water pump AC motor, a pressure transmitter, a GPRS wireless transmission module, a mobile phone client APP, and a coding speed detection module. The microprocessor controller module and the frequency converter form a pressure PID controller to indirectly control the constant nozzle inlet pressure by controlling the pressure of the incoming pressure of the hose reel irrigator. The microprocessor controller module and the matching motor controller with brushless DC motor form a speed PID controller to directly control the reel back speed of the PE pipe. The GPRS wireless transmission module interactively communicates the nozzle inlet pressure, the reel back speed of the PE pipe and the mobile phone client APP through the short message mode. After setting the corresponding parameters, the system realizes the automatic adjustment of the working conditions, improves the uniformity of the sprinkler irrigation operation of the hose reel irrigator, and realizes the remote real-time and precise monitoring of the working conditions of the hose reel irrigator, which provides a front-end guarantee for the intelligent irrigation of the irrigator.