Based on Virtual Instrument technique and Evoc PCL-812PG Multi-function Data Acquisition Card,a measurement system was developed using Delphi 7.0 and the function of AZS-2 soil moisture probe was greatly en- hanced.

• 采用PCl-812PG数据采集卡,基于虚拟仪器技术,以Delphi作为平台开发了土壤含水量测试系统,对AZS -2土壤水分传感器的功能进行了扩展。