The principle of electric eddycurrent sensors is introduced. The method to measure displacement using an electric eddycurrent sensor is given.
本文简单介绍了电涡流传感器的原理，给出了利用电涡流传感器测量位移的方法。
2
The principle of paper thickness on-line measurement using displacement differential method based on laser displacement sensor and electric eddycurrentdisplacement sensor is introduced.