Deck 7: Automation Sensors

Question 1

How does an absolute encoder work?

Answer 1

Absolute optical encoders add enough emitters and receivers,usually four or more in total,to give each position of the encoder its own unique binary address.

Question 2

_____________ use a thin membrane,often made of metal in a capsule arrangement,to move the indicator assembly.

A) Bourdon tube gauges
B) Bellows gauges
C) Diaphragm gauges
D) Pressure relief valves

Answer 2

C

Question 3

__________ are temperature sensors that work off the principle of a small DC millivoltage generated when the junction of two dissimilar metals are heated.

A) Thermocouples
B) RTDs
C) Thermistors
D) IR temperature sensors

Answer 3

A

Question 4

_______ are made up of a solid piece of material that manipulates the flow of electrons without any moving parts.

A) Limit switches
B) Solid-state devices
C) Optical encoders
D) Target flowmeters

Question 5

___________ provide(s) the positive connection or DC voltage to the input module.

A) Sourcing signals
B) Sinking signals
C) Optical isolation
D) Ultrasonic sensors

Question 6

__________ are based on the principle of a linear increase in resistance that occurs when a metal is exposed to heat.

A) Thermocouples
B) RTDs
C) Thermistors
D) IR temperature sensors

Question 7

__________ place a disk or similar shape in the fluid and use the force of the fluid flow to deflect the disk and generate a signal.

A) Turbine flowmeters
B) Target flowmeters
C) Sail flowmeters
D) Magnetic flowmeters

Question 8

___________ are similar to photo eyes except that they emit and receive sound instead of light.

A) Sourcing signals
B) Sinking signals
C) Optical isolation
D) Ultrasonic sensors

Question 9

What is the difference between a sourcing and a sinking signal?

Question 10

_____________ photoelectric sensors place the transmitter and receiver in one assembly and often use something like a bicycle reflector to return the light.

A) Through-beam
B) Retroreflective
C) Diffuse
D) Light-level detection

Question 11

What is the benefit of disengaging the axes as opposed to the E-stop method of stopping the robot when impact is detected?

Question 12

_____________ use a thin-walled,slightly elliptical,cross-sectioned tube bent in a C shape,which is tied directly to the system,to read pressure.

A) Bourdon tube gauges
B) Bellows gauges
C) Diaphragm gauges
D) Pressure relief valves

Question 13

You are setting up a system to detect if fluid is inside a carton so the robot can pick the empty cartons off the line.Which of the following would work for this task?

A) Inductive proximity switch
B) Capacitive proximity switch
C) Photoelectric proximity switch
D) Hall effect sensors

Question 14

__________ use a propeller-type assembly placed inside the fluid to generate a signal via a magnetic pickup sensor positioned nearby,but outside of the fluid.

A) Turbine flowmeters
B) Target flowmeters
C) Sail flowmeters
D) Magnetic flowmeters

Question 15

Micro limit switches commonly have an amperage range of ___________.

A) 1 to 3 amps
B) 1 to 7 amps
C) 1 to 10 amps
D) 1 to 20 amps

Question 16

_____________ photoelectric sensors separate the transmitter and receiver into different units,placed opposite each other.

A) Through-beam
B) Retroreflective
C) Diffuse
D) Light-level detection

Question 17

How do thermocouples work?

Question 18

When using the amperage draw of the motors to monitor for impact,which of the following statements is true?

A) These systems are complex and require high-level math.
B) Noise in the system may cause a false shut down.
C) Excessive payload weight may cause the system to shut down.
D) All of these are correct.

Question 19

_________________ are devices activated by contact with an object that changes the state of its contacts when the object exerts a certain amount of force.

A) Limit switches
B) Inductive proximity switches
C) Photoelectric proximity switches
D) Hall effect sensors

Question 20

_________________use an oscillating magnetic field to detect ferrous metal items.

A) Limit switches
B) Inductive proximity switches
C) Photoelectric proximity switches
D) Hall effect sensors

Question 21

How do we commonly monitor impact today?

Question 22

What are the six main criteria for selecting a sensor?