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超声波在现代技术中的应用很广泛。超声波是根据压电原理(1)和磁致伸缩原理(2)产生的。在航海上,利用回声测深器或水底声音定位器发出的超声波,可以研究海底起伏的情况、发现鱼群和预告冰山的出现(3)。在工厂里,利用超声波探伤器可以发现机器零件内部微小的隙缝、空洞或裂痕(4)。有一种超声波显微镜不谨可以发现进入不透明介质中的物体或透明介质中掺入的其他透明物体,并且还能够把它们的形像显示出来。图中画
Ultrasound is widely used in modern technology. Ultrasonic waves are generated based on the piezoelectric principle (1) and the magnetostriction principle (2). In navigation, ultrasonic waves from an echo sounder or underwater sound locator can be used to study the undulations of the seabed, find fish and predict the appearance of icebergs (3). In the factory, tiny flaws, voids, or cracks inside the parts of the machine can be discovered using ultrasonic flaw detectors (4). There is an ultrasonic microscope that can not find objects that have entered an opaque medium or other transparent objects that are incorporated in a transparent medium, and can also display their image. Picture in picture