Research on measure thermal stability of conductor and monitor circuit by using AC signal

• Main Authors: Kuo-Jung Peng, 彭國榮
• Other Authors: Syang-Ywan Jeng
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/2ft4ft

碩士 === 中原大學 === 電子工程研究所 === 106 === Currently, the instrumental reliability on measuring low resistance conductors using AC carrier signals is received much attention for power line monitoring. The system has a voltage dividing circuit to separately sample the peak voltages of 2 output signals from both ends of the conductor terminals. Based on the 2 signals’ voltage ratio, the degree of conductor degradation can be analyzed. According to the long term observation, we have found that the output signals are significantly affected by environmental temperature.In this work, the thermal stability of the measurement system is studied to improve its measurement accuracy under temperature variation for a long term aspect. By considering the temperature effect, the signal output ratio can be accurately measured under experimentally controller thermal variations. And the output ratio tolerance can be controlled within ±1% in the range between 35 and 60 degrees C.