Protection device and protection method of ultrasonic detector transmitter

The invention provides a protection device and a protection method for an ultrasonic detector transmitter. The protection device comprises a protection cover which is detachably wrapped on the emitter. A plurality of first open holes used for communicating the sounding pipe and the emitter are distributed in the protective cover, and a rubber clamping ring is laid on the inner wall of the protective cover and clamped outside the emitter. The open end of the protective cover is fixedly provided with a movable limiting piece, and the movable limiting piece abuts against one end of a signal line of the emitter when the emitter is arranged in the protective cover. The emitter is fixed in the protection cover through the protection cover, the rubber clamping ring and the limiting piece, and the technical problem that in the prior art, when a cast-in-situ bored pile is detected, the emitter of the ultrasonic detector cannot be effectively protected is solved. The protection device can be detached from the protectio