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Ultrasound is a mechanical wave with an extremely short wavelength. It has the characteristics of high frequency, short wavelength, and small diffraction phenomenon. It can propagate directionally and being reflectet when it encounters obstacles. In nature, bats judge and avoid obstacles by emitting
+On November 20th, the World Cup 2022 began in Qatar. As the host,Qatar put on a wonderful and technological opening ceremony for the world. thousands of UAVs sparkling in the sky, played an impressive aerial show changing a variety of patterns such as the "Hercules Cup, the World Cup Official Emblem
+Ultrasound is a mechanical wave with wavelength less than 2cm, which is characterized by high frequency, short wavelength and small diffraction phenomenon. In industrial production, there are more and more applications of ultrasonic ranging. Among them, ultrasonic liquid level measurement technology
+The appearance of intelligent robots in life and medical fields will have great economic benefits. In restaurants, they can achieve zero-error food distribution, while in hospitals, intelligent robots can be used to replace doctors to enter the infected area for drug distribution. In addition
+Introduction of HC-SR04HC-SR04 is a very popular sensor for measuring distance. It emits ultrasonic waves at a frequency of 40KHz. The ultrasonic waves travel through the air. If there are objects or obstacles in the path, it will bounce back to the module. Taking into account the propagation time a
+Ultrasonic sensors are devices that convert ultrasonic signals into other energy signals (usually electrical signals) to measure distance from the sensor to the target object. Ultrasonic wave is a mechanical wave with a vibration frequency higher than 20KHz and it has the characteristics of high fre
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