Measurement System for Soil Complex Resistivity Based on LabVIEW
Complex resistivity of soil must be measured using low-frequency power supply to overcome the skin effect, but, because of using higher frequency, the existing conventional complex resistivity meter is not suitable for soil. To this end, with the discrete Fourier transform and spectrum analysis, a measurement system for soil complex resistivity based on LabVIEW virtual instrumentation development platform and PXI data acquisition card was designed and developed. The system can measure the complex resistivity of the soil under low frequency, track the fluctuations of supply frequency automatically using of software synchronization technology, and then automatic adjust the sampling rate to reduce measurement error. The measurements results of the Cole-Cole circuit model of complex resistivity show that the system has a high accuracy.
Zhenyu Du and Bin Liu
Y. Zhu et al., "Measurement System for Soil Complex Resistivity Based on LabVIEW", Applied Mechanics and Materials, Vol. 192, pp. 333-340, 2012