Ultrastable and Low-Noise Self-Compensation Method for Circuit Thermal Drift of Eddy Current Sensors Based on Analog Multiplier

  title={Ultrastable and Low-Noise Self-Compensation Method for Circuit Thermal Drift of Eddy Current Sensors Based on Analog Multiplier},
  author={Guofeng Zhao and J. Yin and L. Wu and Z. Feng},
  journal={IEEE Transactions on Industrial Electronics},
  • Guofeng Zhao, J. Yin, +1 author Z. Feng
  • Published 2020
  • Materials Science, Computer Science
  • IEEE Transactions on Industrial Electronics
This article proposes a self-temperature compensation method based on an analog multiplier, which reduces the circuit thermal drift by more than an order of magnitude. An ac bridge eddy current sensor (ECS) is used as an example to analyze the thermal drift of the circuit in detail, and the basic principle of the compensation method is expounded. A high-precision ECS prototype is manufactured and tested. Results show that the temperature coefficient of the circuit in the prototype is decreased… Expand


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