proximity sensor


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proximity sensor

[präk′sim·əd·ē ′sen·sər]
(control systems)
Any device that measures short distances within a robotic system. Also known as noncontact sensor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

proximity sensor

A device that detects the presence of an object in the vicinity. There are many types of sensors for myriad applications; however, they all work by emitting a signal and analyzing the changes in the signal that may be reflected back. In a smartphone, a proximity sensor is located by the phone speaker. It turns off the touch detection during a phone call; otherwise a person's ear would activate functions when pressed against the screen. See VR headset.
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The first noticeable upgrade is the enlarged screen and smaller home button size of the new iPhone 5, claims Justin; other changes including switching the location of the camera and proximity sensor. Now the camera is above the speaker and the proximity sensor is next to the speaker.
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