Abstract:  Agricultural irrigation plays an important role in improving crop yield, and realtime online monitoring of irrigation network leakage has positive practical significance for improving agricultural water use efficiency. An intelligent monitoring system for leakage of irrigation pipe network based on embedded technology was designed in this paper. Through the signal acquisition of piezoelectric acceleration sensor, pressure transmitter, and ultrasonic flowmeter, the data of noise, water pressure, and flow of irrigation pipe network were obtained. After adaptive filtering by embedded MCU, using 4G wireless data communication module, the data collected by the sensor was transmitted to the cloud platform, and the cloud platform management software system processed and analyzed the monitoring data of irrigation pipe network in realtime to determine the leakage of the irrigation pipe network accurately. The test results showed that the system could collect the sensor data of noise, water pressure, and flow effectively, and when the noise value exceeded the warning value of 80 dB, the system would alarm. The data transmission was stable and efficient in the wireless network, the data wireless transmission delay time was less than 1.8 s, the cloud platform management software system functioned normally, and the average response time of data query was less than 1.2 s. The system can be widely used in the realtime monitoring of the operation status of agricultural irrigation pipe networks, effectively improve the efficiency of agricultural irrigation water use and realize the fine management of water use.

Key words: embedded system, wireless communication, agricultural irrigation, leakage of pipe network, cloud platform, intelligent monitoring

摘要： 农田灌溉对于提高农作物产量具有重要作用,灌溉管网漏损实时在线监测对提升农田用水效率具有积极的现实意义。本文设计基于嵌入式的农田灌溉管网漏损智能监测系统,通过压电加速度传感器、压力变送器和超声波流量计等传感器信号采集,获取农田灌溉管网的振动噪声、水压和流量等数据,通过嵌入式单片机自适应滤波处理后,应用4G无线数据通信模块,将传感器采集的数据传输到云平台,云平台应用管理软件系统对灌溉管网监测数据进行实时处理和分析,从而准确确定灌溉管网漏损情况。试验结果表明,在非灌溉时间测试管网漏损状态,系统能够有效采集噪声、水压和流量等传感器数据,噪声数值超过预警值80 dB并进行报警。数据在无线网络中传输稳定高效,数据无线传输延时小于1.8 s。云平台应用管理软件系统功能正常,数据查询平均响应时间小于1.2 s。系统部署实施快捷,可广泛应用于农田灌溉管网运行状态实时监测,有效提高农田灌溉用水效率进而实现用水精细化管理。

关键词: 嵌入式, 无线通信, 农田灌溉, 管网漏损, 云平台, 智能监测