Reconstruction project of groundwater balance experiment site of Zhengzhou:mainly test equipments and data automatic acquisition
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摘要: 郑州地下水均衡试验场的改建，是由中国地质环境监测院主持的国家地下水监测工程中地下水均衡试验场的改建项目之一，由河南省环境地质监测院具体负责实施。科学技术的发展，为试验场观测数据采集的自动化奠定了良好基础。试验场数据采集需要自动化的有：3m高主杆气象站测试系统；太阳全辐射、太阳净辐射、太阳直射观测仪，E—601蒸发仪，5 TM含水率、温度传感器，自动补水仪，负压测量仪。除后两项外，其他需要数据采集仪器已经市场化。后两项是作者的发明与实用专利。自动补水仪是用来模拟地下水位埋深的设备，它是以传统的马里奥特瓶补水原理为基础，采用控制电路使其可以自动补给因蒸发而消耗的水量，同时还可以记录降水的历时过程。负压测量是利用空气运动黏度约大于水运动黏度的15倍这一特性，即当水刚通过多孔瓷头时，气体不能通过多孔瓷头，据此设计了在包气带中能测定负压的传感器。数据采集则应用了惠斯登电桥平衡的补偿原理。由于控制、供电、采集数据的电缆过多，因此数据自动化采集系统应用了三级采集、逐级集成的方案。
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关键词:
- 自动补水仪 /
- 负压传感器 /
- 5 TM水分与温度传感器 /
- 数据自动化采集系统
Abstract: The reconstruction project of groundwater balance experiment site of Zhenzhou was rebuilded by geo-environmental monitoring institute of Henan Province，belongs to one of the national groundwater monitoring projects，which performed by China geological Environment Monitoring Institute.The development of science and technology has laid a good foundation for the automation of observation field observation data collection. The experiment field data needs to be automated collectionincluding 3m high main pole weather station test system with 3m high main pole;solar full radiation, solar net radiation,direct solar observation instrument; E-601 evaporator; 5 TM soil moisture and temperature sensor; automatic water supplying instrument; negative pressure measuring instrument. other data automation collection instrumentes have been marketized except the latter two items , which belong to the author’s invention and utility patents. The automatic water supply instrument is a device based on the traditional Mario bottle hydration principle for simulating the depth of the groundwater level. It is. It uses a control circuit to automatically replenish the amount of water consumed by evaporation as well as record the duration of precipitation. process. The negative pressure measurement utilizes the characteristic that the air kinematic viscosity is about 15 times greater than the water kinematic viscosity, that is to say, when the water just passes through the porous ceramic head, the gas cannot pass through the porous ceramic head, though which a sensor for measuring the negative pressure in the vadose zone is designed. Data acquisition based on the compensation principle of Wheatstone bridge balance. Due to the much more numberes of controlling cables for power supply and data acquisition, the data collection automation system uses a three-level integration scheme. -
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