地下滴灌田间管网室内试验测试系统(简报)

针对地下滴灌管网中各灌水器出流量难以测量的问题,提出一种新的试验测试方法--称重测量法,可获得各灌水器的出流量.测试系统由称重传感器、压力变送器、数据采集系统和计算机及相关软件构成,可同时间接获得地下滴灌管网中各灌水器的出流量和直接测量出支管与毛管的沿程压力.而且还可实现自动监控、自动采集和存储测试数据的功能.实测结果表明:系统测试精度可满足试验要求.该测试系统操作简便,是室内试验研究地下滴灌田间管网水力要素变化规律的有效方法.

Laboratory test system of field pipe network under subsurface drip irrigation

The discharge of every emitter in field pipe network under subsurface drip irrigation (SDI) is not easy to be measured. A new experimentation was introduced, which is a weighing method to solve this problem. The test system consists of weighing sensors, pressure sensors, data acquisition system, and a personal computer. The system not only can synchronously and indirectly measure the discharge of emitters and directly measure pressure of branch pipes and laterals of SDI pipe network in the laboratory, but also can realize the function of automatically monitoring, collect and store test data The measuring results show that accuracy of the test system can meet the experiment requirements, and it is easy to operate. Therefore, it is an effective path to study hydraulic characteristics of field pipe network under SDI in the laboratory.