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随着现代科技的发展,超声应用越来越广泛,如利用超声波测定材料的应力;清除金属粉末表面的氧化层和非金属杂质;改善刀具与加工工件之间的润滑性,从而提高刀具的切削速度等,此外在超声报警、超声显微、超声诊断以及超声计数等方面也均有所发展。超声摄影是以超声波作为信息载体,当超声波遇到弹性结构不同的物体时,其反射、吸收、透过的程度也不相同,从而可以在超声摄影材料上记录物体弹性结构的超声影象,因此超声摄影可以得到与光学摄影完全不同的信息。超声摄影与光学摄影相结
With the development of modern science and technology, ultrasonic applications are more and more widely used, such as the use of ultrasonic stress measurement of materials; removal of oxide and non-metallic impurities on the surface of metal powder; improve the lubrication between the tool and the workpiece, thereby enhancing the cutting tool Speed, etc., in addition to the ultrasound alarm, ultrasonic microscopy, ultrasound diagnosis and ultrasonic counting, etc. have also been developed. Ultrasound is based on ultrasound as an information carrier. When ultrasound encounters objects with different elastic structures, the degree of reflection, absorption and transmission is different, so that the ultrasound image of the elastic structure of the object can be recorded on the ultrasound imaging material. Therefore, Ultrasound photography can be completely different from the optical photography information. Ultrasound photography and optical photography