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Proximity Switch

Proximity Switch. Definition. Proximity switches open or close an electrical circuit when they make contact with or come within a certain distance of an object. Most commonly used in manufacturing equipment, robotics, and security systems

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Proximity Switch

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  1. Proximity Switch

  2. Definition Proximity switches open or close an electrical circuit when they make contact with or come within a certain distance of an object. Most commonly used in manufacturing equipment, robotics, and security systems Proximity switches and sensors use a reed switch and a permanent magnet.

  3. Normally Open

  4. Normally Close

  5. Types of proximity switch Infrared proximity switch Acoustic proximity sensor Inductive proximity switch Capacitive proximity switch

  6. Infrared proximity switch work by sending out beams of invisible infrared light. A photodetector on the proximity switch detects any reflections of this light.

  7. Infrared proximity switch

  8. Acoustic proximity sensor are similar in principle to infrared models, but use sound instead of light. They use a transducer to transmit inaudible sound waves at various frequencies in a preset sequence, measure the time it takes for sound pulses to "echo" and use this measurement to calculate distance, just like sonar.

  9. Inductive proximity switch distance to objects by generating magnetic fields. They are similar in principle to metal detectors. The chief disadvantage of inductive proximity switches is that they can only detect metallic objects.

  10. Inductive Proximity Switch

  11. Capacitive proximity switches sense distance to objects by detecting changes in capacitance around it. These proximity switches have the disadvantage of being more sensitive to objects that conduct electricity than to objects that do not.

  12. Capacitive Proximity Switch

  13. Applications

  14. In Industries

  15. gives a switched output on detecting something coming into proximity.

  16. The AD7150 is an ultra-low-power, 2-channel, capacitance converter designed for highly sensitive proximity sensing applications. It provides a complete signal processing solution for proximity sensors offering important features such as Electromagnetic Compatibility, adaptive environmental calibration, small package, low power consumption and fast response time.

  17. Intelligent sensor families deliver high sensitivity, low power, low cost and small size with robustness.

  18. The MPR08X Proximity Sensing Controllers from Freescale Semiconductor

  19. support multiple electrodes, controlling several different applications from one sensor. By multiplexing the electrodes, a single sensor becomes an extension for detection at multiple points.

  20. Additionally, Freescale's Proximity Sensing Software solution transforms any RS08, S08 or V1 ColdFire® MCUs into a proximity capacitive-touch sensor controller. A software, GUI and hardware solution can get a sensing application up and running very quickly.

  21. In Communication

  22. A mobile communication terminal having a function of detecting a proximity touch and a display controlling method therein are disclosed.

  23. It switch off screen using proximity sensor detection. Proximity Sensor (The newest Screen off tool)

  24. The tweak uses the HD2’s proximity sensor to turn of the screen when a finger or any object is detected in front of it. After proximity detected – screen switched off and proximity sensor don’t used until screen will be switched on again manually.

  25. Freescale's MC33794 Proximity Sensor

  26. The MC33794 proximity sensor relies on interruption of an electric field, using a low frequency sine wave with very low harmonic content whose frequency is adjustable by an external resistor.

  27. Thank you for LISTENING 

  28. Prepared by: Seveses, Cherry Lou Silmeros, Ronelyn Soong, Roberto III Sustiverio, Carmela Kaye T. Umacob, April Suzette P.

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