The built-in sensor of the ultrasonic transducer has the ability to emit ultrasonic waves to the outside

Before making a related introduction, let's first introduce a commonly used field, such as reversing radar. When we buy a new car, the salesman will often introduce us to the relevant hardware in the car. Today, reversing radar has become the standard equipment of today's cars. When we are reversing, when the rear of the car is closer to the obstacle, the car will automatically send out an alarm to remind the driver that there is an obstacle behind, and this is also based on the principle of ultrasonic waves, which is another common manifestation of piezoelectric ultrasonic transducers.it is one of the forms.

 

The built-in sensor of the piezoelectric ultrasonic transducers have the ability to emit ultrasonic waves to the outside. After the emission, the sensor receives the reflected ultrasonic waves again, automatically calculates the data, and then obtains the distance between the rear of the car and the obstacle. The closer the distance, the faster the ultrasonic waves will be transmitted back, and the farther the distance, the slower the ultrasonic waves will be transmitted back. This is the sensor of the reversing radar, and it works in the same way as other sensors.

 

Ultrasound usually has the characteristics of high frequency, short wavelength, and good directionality, and it can propagate as directional rays. Therefore, it is widely used in various fields, and it is the best for distance measurement, after all, its accuracy is also guaranteed. But you also need to pay attention when using it. There are some environments where the sensor cannot function. After all, it relies on ultrasonic waves to work. Ultrasonic waves have great penetrating power to liquids and solids, but ultrasonic range transducers cannot propagate in a vacuum environment. Therefore, the vacuum environment should be avoided as much as possible during the work process. Moreover, the working limitation of the sensor is also very low, and its ability to conduct rain, snow and fog is very strong, even if the environment is harsh, it can also work normally and efficiently. Therefore, before carrying out relevant measurement work, the corresponding homework should be done in advance to avoid invalid operations and invalid measurements, which are time-consuming and labor-intensive.

 

Therefore, relatively speaking, the accuracy of piezoelectric ultrasonic transducers have significant advantages in the field of measurement.