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A distance sensor is a type of device used to measure the distance or proximity between an object and the sensor. Distance sensors can be divided into various types according to their working principles and application scope. Here are some common distance sensor types:
ULTRASONIC SENSOR: Ultrasonic sensors use an ultrasonic pulse transmitter to emit sound waves and measure the time it takes for the sound waves to reflect back to the sensor to calculate distance. This type of sensor is typically used to measure the distance from an object to the sensor, for example to measure liquid level or avoid obstacles.
Infrared sensor (infrared ranging module): The infrared sensor uses an infrared light emitter to emit an infrared beam, and then measures the time or intensity of the infrared light reflected back to the sensor. This kind of sensor is widely used in measuring proximity, obstacle avoidance, reflective objects, etc.
Laser ranging sensor: A laser ranging sensor uses a laser beam emitter to emit laser light and measures the time it takes for the laser light to reflect back to the sensor to calculate the distance. These sensors typically have high accuracy and are suitable for applications that require high-precision measurements, such as terrain mapping and robot navigation.
Inductive sensor: Inductive sensor uses the principle of electromagnetic induction to measure the distance from the object to the sensor. They are commonly used for the detection and measurement of metal objects.
Capacitive sensor: Capacitive sensor detects distance by measuring the change in capacitance between the object and the sensor. This type of sensor is commonly used in contact touch screens and some close proximity detection applications.
Pressure sensor: A pressure sensor can estimate distance by measuring the pressure an object exerts on the sensor. They are often used to measure the weight of heavy objects or detect changes in pressure.
Photoelectric sensor: A photoelectric sensor uses the travel time of light or the intensity of light to measure the distance from an object to the sensor. This type of sensor is typically used to detect the presence and distance of objects.
Cameras and vision sensors: Cameras and vision sensors measure distance by photographing objects and analyzing features in the images. This approach is commonly used in computer vision and robotic vision systems.
Each of these distance sensor types has different advantages and applicability, and the appropriate sensor type can be selected according to the requirements of the specific application.
