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• 10:41, 14 March 2025 Tianshuo talk contribs created page Ultrasonic Doppler Speedometer (Created page with "1. Objective (1) Understand the principles of the ultrasonic Doppler effect and its application in speed measurement. (2) Design and build an ultrasonic Doppler speedometer to measure the velocity of a moving object. (3) Analyze experimental data and improve measurement accuracy. 2. Principle The ultrasonic Doppler effect states that when ultrasonic waves encounter a moving target (such as a small car or fluid), the frequency of the reflected wave shifts. The freque...")