Crake depth testing instrument

The utility model relates to a crack depth tester, which comprises a main control system, wherein, the main control system is connected with a transmitting energy transducer through a high-pressure transmitting module, and the high-pressure transmitting module applies the high-pressure pulse on the transmitting energy transducer, so that the transmitting energy transducer generates a sound-wave signal; the received sound wave signal is amplified and filtered by a receiving energy transducer through a signal receiving regulating module, and then is converted into a digital signal by an analog-to-digital conversion module and is conveyed to the main control system; the main control system processes the received digital signal, and directly calculates the depth of the crack; the main control system interacts with the user through a human-computer interface module. The tester has simpler structure and more convenient operation, and can be rapidly mastered and used by the user without the training, and has high pr