A kind of automated guided vehicle（ AGV） guidance sensor based on eddy current effect is designed.The proposed sensor utilizes the eddy current principle

according to inductor digital converter LDC1000 acquire changes of equivalent resistance of the external coil

obtain offset distance between the sensor center and the metal tape center. Describe the system hardware configuration in detail. In-room work areas laid on track

the proposed AGV guidance sensor is experimentally tested. Analysis of the distribution of the results of the experimental data confirms availability of the designed sensor. The sensor can be used to guide the AGV and has characteristics of high precision

easy to build and maintain.