CRS Sensors, I/O & Vision Systems

Question 1

Which type of sensor is most commonly used to measure the rotary position of a robot joint?

Accepted Answer

Incremental or absolute encoder

Answer

Capacitive proximity sensor

Answer

Ultrasonic rangefinder

Answer

Inductive load cell

Question 2

What is the primary purpose of a force/torque sensor mounted at a robot's wrist?

Accepted Answer

To detect and respond to contact forces during task execution

Answer

To measure electrical current draw of the end-effector

Answer

To calibrate the robot's zero-point reference

Answer

To sense ambient temperature near the tool

Question 3

An inductive proximity sensor will reliably detect which type of target?

Accepted Answer

Ferrous or non-ferrous metallic objects

Answer

Transparent plastic films

Answer

Wooden pallets

Answer

Cardboard packaging

Question 4

In a robotic I/O system, what is the function of a sourcing (PNP) digital output?

Accepted Answer

It supplies voltage to the load when active

Answer

It sinks current from the load when active

Answer

It converts analog signals to discrete levels

Answer

It provides galvanic isolation between the robot and field device

Question 5

What does an absolute encoder provide that an incremental encoder does not?

Accepted Answer

A unique position value at every shaft angle without requiring a homing cycle

Answer

Higher resolution counts per revolution

Answer

Faster signal update rates

Answer

Immunity to electrical noise

Question 6

Which sensor technology is best suited for detecting a transparent glass bottle on a conveyor in a robotic cell?

Accepted Answer

Capacitive proximity sensor

Answer

Inductive proximity sensor

Answer

Magnetic reed switch

Answer

Hall-effect sensor

Question 7

What is the purpose of the analog-to-digital converter (ADC) in a robotic controller's I/O module?

Accepted Answer

To convert continuous voltage or current sensor signals into digital values the controller can process

Answer

To amplify low-level sensor signals before transmission

Answer

To provide galvanic isolation on digital input channels

Answer

To convert robot program instructions into motor drive commands