无源控制节水灌溉装置研究进展

Advances in Passive Control of Water Saving Irrigation Valve

水资源短缺已成为世界各国亟待解决的问题,节水灌溉设备直接影响农业节水效率。无源自控节水灌溉技术是利用湿敏材料的吸水膨胀失水收缩的特点,达到自动控制的目的。该技术从最初的张力计发展到现在的自适应试节水阀,通过对这些设备原理的分析,总结出其优缺点,明确以后的改进方向。

The shortage of water resources has become the question that the world urgently awaits to be solved. Each country is developing the water-saving irrigation technology. The passive control of water-saving irrigation technology achieve the purpose of automatic control by using the character of humidity-sensitive material that swelling when watered and shrinking when dried out. The technology is developed from tensiometer to the auto-adapted water saving valve. Through studying the mechanism of these equipments, their advantages and disadvantages were summed up to find a clear direction for future improvement.