Proximity Sensors Overview

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Questions and Answers

What is the main principle behind the operation of an inductive proximity sensor?

  • It generates an alternating magnetic field that is modified by the presence of a metallic object. (correct)
  • It generates an alternating electric field that is modified by the presence of an object.
  • It uses capacitance changes to detect the presence of any type of object.
  • It uses a light source and semiconductor switch to detect the presence of an object.

What is the typical operating range of a capacitive proximity sensor?

  • 1 - 10 mm (correct)
  • 10 - 50 mm
  • 50 - 100 mm
  • Up to 5 mm

Which type of photoelectric sensor uses a light source and a reflective surface to detect the presence of an object?

  • Through-Beam
  • Diffuse-Reflective
  • Mirror Reflective
  • Retro-Reflective (correct)

What is the main difference between inductive and capacitive proximity sensors?

<p>Inductive sensors can only detect metallic objects, while capacitive sensors can detect any type of object. (A)</p> Signup and view all the answers

What is the primary purpose of a proximity sensor?

<p>To detect the presence of an object without physical contact. (C)</p> Signup and view all the answers

Which type of photoelectric sensor uses a light source and a semiconductor switch to detect the presence of an object?

<p>Through-Beam (B)</p> Signup and view all the answers

What is the primary advantage of a retro-reflective photoelectric sensor?

<p>It uses a special prism reflector to return the transmitted light in the same direction, allowing the transmitter and receiver to be housed in the same package. (C)</p> Signup and view all the answers

How does a diffuse reflection photoelectric sensor operate?

<p>It detects objects by measuring the diffuse reflection of light from non-smooth surfaces. (C)</p> Signup and view all the answers

What is the Hall effect?

<p>The generation of a voltage difference in a conductor when it is placed in a magnetic field perpendicular to the current flow. (B)</p> Signup and view all the answers

Which type of photoelectric sensor is suitable for long-range sensing applications up to 10 meters?

<p>Through-beam photoelectric sensor (B)</p> Signup and view all the answers

In a mirror reflective photoelectric sensor, how is an object detected?

<p>When the reflected beam of light from a plane surface mirror is broken. (B)</p> Signup and view all the answers

What is the basis of Hall effect sensors?

<p>The generation of a voltage difference in a semiconductor plate when placed in a magnetic field perpendicular to the current flow. (C)</p> Signup and view all the answers

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