Deck 8: Hall Effect Sensors and Proximity Detectors

Question 1

Proximity detectors are designed to detect the presence or absence of some object.

Answer 1

True

Question 2

____ proximity detectors will sense ferrous metals better than nonferrous.

A) All-metal
B) Plastic
C) Tank
D) Quartz

Answer 2

All-metal

Question 3

Many ultrasonic sensors have an analog output of voltage or current, the value of which is determined by the ____.

A) size of the detector
B) capacitance of the detector
C) size of the object
D) distance to the object

Answer 3

distance to the object

Question 4

Because ____________________ proximity detectors do not depend on metal to operate, they will sense virtually any material such as wood, glass, concrete, plastic, and sheet rock.

Question 5

____________________ detectors operate by emitting a pulse of high frequency sound and then detecting the echo when it bounces off an object.

Question 6

Give an overview of proximity detectors.

Question 7

Discuss eddy currents as they relate to tank circuits.

Question 8

The Hall effect was discovered by Edwin H. Hall at Johns Hopkins University in 1979.

Question 9

Two factors determine the polarity of the voltage produced by the Hall generator: the direction of current flow and the ____ of the ____ field.

A) polarity; magnetic
B) polarity; gravitational
C) strength; magnetic
D) strength; gravitational

Question 10

____ are designed to produce an output voltage that is proportional to the strength of a magnetic field.

A) Reluctors
B) Linear transducers
C) Hall transducers
D) Regulators

Question 11

What determines the amount of voltage produced by the Hall generator?

Question 12

How can the Hall generator be used to sense position?