介绍了用集成锁相环路解码器LM567作为超声波检测元件，以89C51单片机作为主控元件的超声波液位测量的原理、电路及测控程序。
The theory, the circuit, and the program were introduced using LM567 as the component to detect the ultrasonic and using the MCU 89C51 as the main control component.
本发明的用于生物体的超声波诊断装置的超声波探头具有由多个积层型振动元件构成的振子阵列。
An ultrasonic probe for use in an ultrasonic diagnosis apparatus for a living body comprises an array transducer made up of a plurality of layered transducer elements.
所述引导元件被构造为超声波空气轴承形式(28,38)的超声波支承单元。
The guiding elements are constructed to ultrasonic wave supporting units of ultrasonic wave air bearing modes (28, 38).
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