Due to the strong directivity of ultrasonic waves, slow energy consumption, and long distances in the medium, ultrasonic waves are often used for distance measurement. For example, ultrasonic rangefinders and level measuring instruments can be realized by ultrasonic waves. Ultrasonic testing is ofte

Principle of piezoelectric ultrasonic generator　　Piezoelectric ultrasonic generator actually uses the resonance of piezoelectric crystal to work. The internal structure of the ultrasonic generator is shown . It has two piezoelectric wafers and a resonance plate. When a pulse signal is applied to its

What is ultrasonic ranging sensor　　 Due to the strong directivity of ultrasonic waves, slow energy consumption, and long distances in the medium, ultrasonic waves are often used for distance measurement. For example, ultrasonic rangefinders and level measuring instruments can be realized by ultrason

production diagram of HC-SR04 ultrasonic ranging module sensor

Accuracy of ultrasonic ranging sensor module: ±(1cm+0.5%×distance), which is relatively low. The principle of ultrasonic ranging is to use the known propagation speed of ultrasonic waves in the air to measure the time when the sound wave encounters obstacles and reflect back after transmission, and

In recent years, with the development of mobile robots, unmanned vehicles and drones, the demand for obstacle avoidance ultrasonic sensors has increased. Traditional ultrasonic sensors that can be used to avoid obstacles include millimeter wave radar, lidar, binocular vision sensors, ultrasonic sens

Ultrasonic waves have beam and reflection characteristics, which can basically travel along a straight line, and their energy is much larger than the low frequency sound waves of the same amplitude. The non-contact ultrasonic ranging sensor is made by using this characteristic of ultrasonic waves. I