Unilateral air coupling ultrasonic scanning imaging device and method

The invention relates to an unilateral air coupling ultrasonic scanning imaging device and method, the device is used for internal defect detection of an object, the device includes a probe scanning frame, a pair of planar transmitting probes and a pair of focusing receiving probes, a preamplifier, a pulse transmitting receiver, a signal acquisition and processing module and a computer, the pair of planar transmitting probes and the pair of focusing receiving probes are arranged on the same side of the probe scanning frame, the pulse transmitting receiver is connected with the pair of planar transmitting probes, the pulse transmitting receiver is connected with the pair of focusing receiving probes by the preamplifier, and also is connected with the computer by the signal acquisition and processing module, and the probe scanning frame is respectively connected with the computer, the pulse transmitting receiver and the signal acquisition and processing module. Compared with the prior art, , the unilateral air coupling ultrasonic scanning imaging device has the advantages of being easy to focus, high in emission efficiency, high in identification and the like.