基于Keithley 2000实现多路地温传感器数据采集

利用VB环境下的串行通信控件,借助于Keithley 2000多路扫描卡,实现Keithley 2000数字多用表与计算机的串行通信及4线电阻测量方式下10路地温传感器数据自动化批量采集,从而解决自动站铂电阻温度传感器室内校准中依靠自动站采集器存在通道误差、校准精度不高的问题。业务应用表明:使用该系统校准地温传感器,具有检定结果精度高、数据刷新快捷等优点,提高了工作效率。

Data Acquisition of Multi Channel Soil Temperature Sensor Based on Keithley 2000

The communication of the Keithley 2000 Digital Multimeter and PC, and the automatic hatch acquisition of the 10-channel 4-wire soil temperature sensors are realized, based on the serial communication subroutine of VB, by means of the model multiplexing scanner card of the Keithley 2000. It solved the existing problems of channel errors and low precision in the calibration of platinum resistance temperature sensors using automatic weather station data loggers in laboratory. The practical application shows that this system can provide high-accuracy test results in calibrating soil temperature sensors, fast real-time data refreshing, and improved working efficiency.