该系统以空气中超声波的传播速度为确定条件，利用反射超声波测量待测距离。
The system could measure certain distance on the premise that the speed of reflected wave in the air is fixed.
该设计是以空气中超声波的传播速度为确定条件，利用超声波反射时间为参数来测量待测距离。
The design is based on the velocity of the air ultrasound to determine the conditions for the use of ultrasound reflection time parameters to measure the unknown distance.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
应用推荐