Proximity Sensors and Diffuse Reflective Sensors Quiz
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Questions and Answers

How do Inductive Proximity Sensors work?

They produce a (weak) magnetic field with an oscillator and coil, inducing eddy currents in metallic objects entering the field.

Why are Capacitive Proximity Sensors used?

To produce an electrostatic field and detect objects acting as capacitors.

What is the purpose of Ultrasonic Sensors?

To measure distance by using capacitors and detecting changes in voltage.

How do Electric Field Sensors work?

<p>By creating an electrostatic field and detecting changes in voltage.</p> Signup and view all the answers

What is the main function of Ultrasonic Sensors in sonar systems?

<p>To use a beam of ultrasonic sound as a sonar system for distance measurement.</p> Signup and view all the answers

How are Proximity Sensors affected by the range?

<p>The range is related to the size of the coil and is not affected by mass or material of the target.</p> Signup and view all the answers

What type of field is utilized by Electric Field Sensors for object detection?

<p>Electrostatic field</p> Signup and view all the answers

What technology is used by Ultrasonic Sensors for distance measurement?

<p>Sonar system</p> Signup and view all the answers

What is the purpose of pulsing the emitter in optical sensors?

<p>To increase the emitter's lifespan</p> Signup and view all the answers

In what context would a dark sensing optical sensor be more suitable compared to a light sensing one?

<p>For detecting transparent objects</p> Signup and view all the answers

How do contact sensors differ from non-contact sensors in terms of operation?

<p>Non-contact sensors detect without touching the component</p> Signup and view all the answers

What type of surfaces are 'diffuse reflective' sensors more useful for?

<p>Opaque surfaces</p> Signup and view all the answers

What are the advantages of using a dark sensing optical sensor over a light sensing one?

<p>For detecting transparent objects</p> Signup and view all the answers

What is a characteristic of Diffuse Reflective Sensors?

<p>They cannot sense black color and are used to sense transparent objects.</p> Signup and view all the answers

What type of disk does an Absolute Encoder typically use for position representation?

<p>Transparent disk with opaque lines.</p> Signup and view all the answers

How many wires are typically used in load powered sensors?

<p>Three wires</p> Signup and view all the answers

What feature influences the range of Proximity Sensors?

<p>Mass</p> Signup and view all the answers

What can reduce the effectiveness of the range of Proximity Sensors?

<p>Shielding</p> Signup and view all the answers

What type of optical sensor can differentiate between colors based on the object's background color?

<p>Color-differentiating Sensor</p> Signup and view all the answers

How does a special reflective sensor sense shiny objects?

<p>Using small prisms to polarize light</p> Signup and view all the answers

In which mode is the sensor on when the receiver cannot detect the beam from the emitter?

<p>Dark-on mode</p> Signup and view all the answers

What kind of optical sensor emits light across a space and senses the light when not blocked by an object?

<p>Diffuse Reflective Sensor</p> Signup and view all the answers

What is the main difference between digital and analog sensors?

<p>Digital sensors have transistor outputs while analog sensors have a continuous range of voltage or current.</p> Signup and view all the answers

What are the media used for sensing in digital sensors?

<p>Light, sound, electric field</p> Signup and view all the answers

In optical sensors, what is the most common type of light used for sensing objects?

<p>Infrared light</p> Signup and view all the answers

What is the primary purpose of pulsing the emitter in optical sensors?

<p>To reduce the sensor's lifespan</p> Signup and view all the answers

What type of optical sensor emits light to a specific focal point and senses the reflected light from that point?

<p>Focal Length Sensor</p> Signup and view all the answers

What are the primary differences between electric field sensors and proximity sensors?

<p>Electric field sensors detect changes in electric field strength, while proximity sensors detect the presence or absence of an object.</p> Signup and view all the answers

Describe a characteristic of optical sensors that use fiber-optic cables.

<p>Small size and flexible</p> Signup and view all the answers

Which optical sensor type is unable to sense transparent objects?

<p>Diffuse Reflective Sensor</p> Signup and view all the answers

What type of optical sensor emits light across a space and senses it when the light is not blocked by an object?

<p>Diffuse Reflective Sensor</p> Signup and view all the answers

What is the main function of a Focal Length Sensor?

<p>Emit light to a specific focal point and sense the reflected light from that point</p> Signup and view all the answers

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