Small Handheld Long Range Ultrasonic Sensor Open Type For Separate
|Center frequency||40.0±1.0KHz|| |
|Housing material||Aluminum or Plastic|| |
|Driving Voltage||≤40Vrms|| |
|Operating Temperature||-20～+70℃|| |
|Storage Temperature||-40～+85℃|| |
- Remote Control
- Automatic doors
- Burglar and disaster detection alarm
- Distance meter and range finder
The main function of the ultrasonic sensor are transmitting and
receiving. Ultrasonic sensors provide easy method of distance
measurement. defined as electronic devices that emit an acoustic
wave beyond the upper range of human hearing called the audible
range, between 20 hertz and 20 kilohertz and determine the distance
between the sensor and an object based on the time it takes to send
the signal and receive the echo. generic distance measurement, and
commercial fish finders, among other applications.
How to calculate distances?
How does it work?
The Ultrasonic Sensor sends out a high-frequency sound pulse and
then times how long it takes for the echo of the sound to reflect
back. The sensor has 2 openings on its front. One opening transmits
ultrasonic waves, (like a tiny speaker), the other receives them,
(like a tiny microphone).
The speed of sound is approximately 341 meters (1100 feet) per
second in air. The ultrasonic sensor uses this information along
with the time difference between sending and receiving the sound
pulse to determine the distance to an object. It uses the following
How to calculate the time?
Time = the time between when an ultrasonic wave is transmitted and
when it is received.You divide this number by 2 because the sound
wave has to travel to the object and back.