The flexible ultrasonic sensor features high energy conversion efficiency, a sensitivity exceeding 65db, a wide frequency band, and the ability to bend 180 degrees. It can fully adhere to the surface of objects, enabling signal acquisition from both flat and curved surfaces. This sensor can serve as a signal acquisition and reception device for inspection (monitoring) equipment, such as for damage, corrosion, defects, and thickness measurement. It can also be customized to meet customer needs, offering both single-point and multi-point reception capabilities, with the output tailored to the specific signal requirements of the customer.