The performance improvement of conductivity sensor via primary Held compensation
In this paper we propose novel magnetic sensor architecture to estimate the conductivity distribution of sample. However, the magnetic field received by the sensor coil would be impaired by primary field (excitation field). For the biologic tissues measurement, the ratio between the primary and secondary components can be up to 10000:1.This could reduce the sensitivity of measurement systeM substantially. For improving the sensitivity of measurements, the aligning coil and differential technique were applied together to eliminate the component of primary magnetic field which is coupled on the sensor coil. To evaluate the performance of noise on the differential alignment gradiometer, we have compared the noise component of differential alignment coil with other measurement coils. By the aligning coil and differential technique, the component of primary magnetic field could be eliminated largely. So, the proposed contactless conductivity sensor not only can improve the measurement sensitivity but also reduce the undesired interference. This technique can be use to estimate low conductivity material, such as biologic tissue. We hope this technique can applied to the analysis of biologic material further
Chen-Ning Huang Fang-Ming Yu Ta-Chung Hsieh Hung-Yuan Chung
National Central University, Department of Electrical Engineering, No.300, Jungda Rd, Jhongli City, St. Johns & St. Marys Institute of Technology, Department of computer science and information Engi National Central University,Department of Electrical Engineering, No.300, Jungda Rd, Jhongli City, 3
国际会议
第四届仪器科学与技术国际会议( 4th International Symposium on Instrumentation and Science and Tcchnology)
哈尔滨
英文
1346-1352
2006-08-08（万方平台首次上网日期，不代表论文的发表时间）