ZHANG Yongchao, ZHAO Luhuai, PANG Pengfei. Study on application of nickel-chromium alloy wire in differential transformer displacement sensor[J]. 2021, (3): 55-57.
ZHANG Yongchao, ZHAO Luhuai, PANG Pengfei. Study on application of nickel-chromium alloy wire in differential transformer displacement sensor[J]. 2021, (3): 55-57. DOI: 10.13873/J.1000-9787(2021)03-0055-03.
Aiming at the shortcomings of copper enameled wire used in primary coil of differential transformer sensor
a differential transformer sensor using nickel-chromium alloy wire with good temperature stability as primary coil is proposed. The temperature characteristics of the two kinds of wires and the errors caused by the temperature changes on sensor are analyzed theoretically. A differential transformer sensor measuring system with two kinds of wires as primary coils is designed. The system consists of a differential transformer sensor
a signal conditioning circuit
a FPGA and a display circuit. The test results show that the relative error of output voltage of the system adopting nickel-chromium alloy wires is reduced by 6. 9 % for every 20 ℃ rise in temperature