Aiming at demand of damage detection of service rail

a multi-channel detector based on ultrasonic principle is designed

and application realization of no blind detection of rail head of service rail is introduced.The system adopts ARM and DSP dual-core structure to realize data porcessing and control display

the program control amplifier AD604 realizes echo signal depth gain compensation.In this design

optimization design is carried out on system structure and gain regulating circuit

use reasonable process design

detection precision is promoted and detection range is expanded.Test result indicates that the design has small linear error and high stability

has application value.