Coded excitation-based ultrasonic rock longitudinal and transverse wave speed measuring device and method

The invention discloses an ultrasonic rock longitudinal and transverse wave speed measuring device and method based on coded excitation. The device comprises a main control module, a coded modulation module, a transmitting module, a longitudinal and transverse wave integrated transmitting probe, a longitudinal and transverse wave integrated receiving probe, a data acquisition module and a data processing module. According to the measuring device disclosed by the invention, a coding excitation technology is applied to rock longitudinal and transverse wave sound velocity measurement, so that the signal-to-noise ratio of an observation waveform can be improved under the condition that the resolution is not lost; different excitation voltages can be selected for rocks with different lithology, the amplitude of a transmitted signal is improved through a high-voltage excitation mode, and the signal-to-noise ratio of an observation waveform is further enhanced; the longitudinal wave and transverse wave integrated ul