What is an ultrasonic sensor?

Ultrasonic sensor is a device that uses high -frequency sound to measure distance. These sensors are also known as transceivers and work similarly to Sonar. While Sonar is primarily used underwater, ultrasonic transceivers can be used in the air. Sensors using ultrasonic waves are common in industrial and medical applications. This device creates a sound pulse that is out of the range of hearing of the human ear. Most fixed objects reflect sound waves. The transceiver uses a timer to accurately determine how long an ultrasonic pulse takes to "bounce" from the object and return to the unit.

The sound wave usually travels at a known speed. In the air in the room, this speed is approximately 1 126 feet (343 meters) per second. If the speed and time of ultrasonic pulses are known, the distance of the reflecting object can be estimated by means of a basic mathematical calculation. If an ultrasonic sensor releases a pulse and receives a reflected signal one tenth of a second later, the object is inFollowing 112 feet (34 meters). However, the ultrasonic sensor is not always accurate. Several factors can degrade the ability of the sensor to accurately measure the distance. The sound speed is not constant, but may vary depending on the temperature and humidity. This means that very warm or very cold conditions can make an ultrasonic sensor ineffective.

objects reflect sound waves in different ways. Some materials, such as metal, reflect the sound very well. Soft materials including plush fabrics often absorb sound waves. The accuracy of this type of sensor can be affected by the type of detected object.

ultrasonic sensors have many applications. Industrial machines often use these sensors to detect the presence of the building in the auto -room on the Tomato. For example, a machine designed to apply bottle labels can use ultrasonic methods to determine when the product is in place and ready for stamming. HeadlessThe installation also uses audio sensors to detect the presence of an unauthorized person. These sensors can be used to create a "virtual fence" around a secure area.

Healthcare facilities often use ultrasonic sensors. The sensors used in medicine are more accurate than most industrial devices, but work using the same principle. Ultrasonic display uses high -frequency pulses to detect both fixed objects and open spaces. The transmitter connected to the computer is able to create a picture that shows these different areas, and doctors can use it to visualize areas in the human body.