Coupling matching device for electromagnetic ultrasonic thickness measuring probe

The invention provides a coupling matching device for an electromagnetic ultrasonic thickness measuring probe, and the coupling matching device provided by the invention comprises an excitation signal input interface, an isolated interference prevention module, a thickness measuring probe interface, an impedance matching module, a clamping voltage limiting module and a signal conditioning module interface, wherein an excitation source is accessed to the excitation signal input interface so as to input original excitation signals; the isolated interference prevention module is used for shielding interference signals in the original excitation signals; the thickness measuring probe interface is used for connecting the electromagnetic ultrasonic thickness measuring probe and driving the electromagnetic ultrasonic thickness measuring probe through the excitation signals; the impedance matching module is used for carrying out impedance matching on the output impedance of the isolated interference prevention module