Reversing radar is a kind of automotive safety aid that helps the driver better control the vehicle by emitting ultrasonic waves to detect obstacles around the vehicle and feed back the detected information to the driver.
So, does the reversing radar use ultrasonic waves or infrasound waves?
First, we need to understand the definitions of ultrasound and infrasound. Ultrasound refers to sound waves with a frequency higher than what humans can hear, whereas infrasound refers to sound waves with a frequency lower than what humans can hear. So, by definition, ultrasound and infrasound are two different sound waves.
Ultrasound
Ultrasound is a type of sound wave with a frequency higher than what a human can hear, usually with a frequency between 20 kilohertz and 20 megahertz. When ultrasound waves travel through the air, their velocity is about 340 meters per second. Ultrasonic waves are reflected when they encounter obstacles, and the reflected sound waves are received by the sensor, and the distance and relative position between the obstacle and the sensor can be calculated. Therefore, reversing radars usually use ultrasonic waves as the signal source.
Infrasound
Infrasound is a type of sound wave with a lower frequency than the sound that humans can hear, usually with a frequency between 10 hertz and 30 hertz. When infrasound waves travel through the air, their velocity is about 340 meters and seconds. Unlike ultrasound, infrasound waves are not easily absorbed by water and air, so they travel a long distance. However, infrasound waves are not easily reflected, so their application in reversing radars is less common.
theSecond, we can analyze whether it uses ultrasonic waves or infrasound waves by how the reversing radar works.
The reversing radar detects obstacles around the vehicle by emitting ultrasonic waves, and when the ultrasonic waves encounter obstacles, they are reflected back and received by the receiver, creating an echo. The reversing radar then converts this echo into a sound or image to alert the driver. Therefore, from the perspective of working principle, the reversing radar uses ultrasonic waves to detect.
Finally, we can analyze this problem from the perspective of practical application.
In practice, the reversing sensor must be able to detect obstacles around the vehicle and give accurate warnings. Due to the higher frequency of ultrasound, its penetration and sensitivity are relatively strong, so it is better able to detect surrounding obstacles. The frequency of infrasonic waves is low, and its penetration ability and sensitivity are relatively weak, so it cannot meet the actual needs of reversing radar.
In summary, reversing radars usually use ultrasonic waves as a signal source instead of infrasound waves. This is because ultrasound has a higher accuracy and utility when detecting surrounding obstacles. Look for an AI Writer Program