Bubble boundary pressure detection device and method based on ultrasonic-electric spark coupling

The invention discloses a bubble boundary pressure detection device and method based on ultrasonic-electric spark coupling. The detection device comprises a test bed and an observation mechanism. The first needle-shaped electrode is directly installed on the ultrasonic transducer, combination of ultrasonic waves and electric sparks is achieved, and the whole structure is simple and compact; the temperature of the discharge medium is adjusted through the constant-temperature heater, so that the initial temperature of the discharge medium is kept consistent with the temperature when the stable temperature is reached only under the action of ultrasonic waves under the condition of no ultrasonic waves, and the accuracy of a contrast test is ensured; the observation mechanism is used for shooting the bubble forming process of the electric sparks; and the image is processed, and the boundary pressure of the bubbles in the absence of ultrasound and in the presence of ultrasound is calculated and compared based on a