Proximity Sensor


As-Salaam-Alaikum, Welcome to my blogger "World of Knowledge".Here we discuss the topic Proximity Sensors.


Points to be discuss in this Article are given below :

  • Proximity Sensor
  • Types of Proximity Sensor
  • Operation
  • Application


Proximity Sensor:

A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor always requires a metal target.

The maximum distance that this sensor can detect is defined "nominal range". Some sensors have adjustments of the nominal range or means to report a graduated detection distance.Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between sensor and the sensed object.

Types of Proximity Sensors:
  • Inductive Sensors
  • Optical Sensors
  • Capacitive Sensors
  • Ultrasonic sensors
  • Laser Sensors
Operation:

 A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target.


Application:

        Machine Tool
Automotive
Packaging
Automation
Stamping
Conveyor Systems
Knitting Industry
Bottling and Food Industry
Elevator and Escalators
Robotics
Drugs and Cosmetics
Metal Forming Machines
Proximity sensor installed on the front of an iPhone 5 next to the earpiece automatically 
turning off  the touchscreen when the sensor comes within a predefined range of an object 
(such as a human ear) when using the handset.




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