Distance sensors are devices that can detect any object and check if it lies within its range. The distance sensor will usually send a signal to an electronic circuit. This will cause the circuit to perform a necessary action. This might include actions such as opening a door, sounding an alarm or turning on a light. Most distance sensors can detect any object if it comes too close.
Distance sensors are used in various applications such as the ones given below:
Radar – Radar is a type of distance sensor and it uses radio waves or microwaves as a medium to detect objects. These waves are directed towards an object and they are repelled from the surface of the object. These waves are then used to calculate the distance between the radar and the object. The time taken for the wave to return can be measured and used by the application.
Sonar – Sonar uses a distance sensor and works in a way that is very similar to radar. Sonar uses sound as a medium to determine the distance between it and an object. Sonar is used by humans for underwater detection. It was initially inspired by land mammals such as bats that use sonar to detect their prey.
Distance sensors are mainly used in industrial applications. They are available in many different types and hence you need to use one that suits your requirements.
