30 Questions
What is the primary function of a sensor?
Measure a measurable attribute and convert it into a signal
Which type of sensors must have physical contact with the object being sensed?
Non-contact sensors
What is a characteristic of digital sensors?
Operate based on transistor outputs
Which media are commonly used for sensing in digital sensors?
Light and sound
What components are typically used when employing light to sense objects?
Light source (emitter) and light detector (receiver)
In the context of sensors, what is the purpose of pulsing the emitter?
To increase the emitter's operational life
How are industrial sensors typically categorized?
By digital or analog output
What distinguishes non-contact sensors from contact sensors?
They do not require physical contact with the component being sensed
What type of sensor is able to differentiate between colors?
Color-differentiating sensor
Which type of optical sensor uses a special reflector with small prisms to polarize light?
Shiny object sensor
What characterizes an optical sensor known as Focal Length Sensor?
Emits light to a specific focal point for sensing
In which type of optical sensor is the emitter on when the receiver cannot detect the beam from the emitter?
Diffuse Reflective sensor
Which optical sensor is not able to sense transparent objects?
Diffuse Reflective sensor
What distinguishes an Optical Sensor with a fiber-optic cable attached?
It has small size and flexibility due to the fiber-optic cable
What type of sensors are used to detect ferrous objects?
Inductive proximity sensors
Which type of encoders provide more resolution than absolute encoders?
Incremental encoders
What is the main difference between absolute and incremental encoders?
Incremental encoders have a unique pattern for each position on the disk.
Which type of sensor uses a beam of ultrasonic sound as a sonar system?
Ultrasonic sensors
What is the purpose of a mask with opaque lines on a transparent disk in encoders?
To represent each position of the disk
How do inductive proximity sensors detect ferrous objects?
By inducing small eddy currents in metallic objects entering the magnetic field
What happens when an object acts as the second plate of a capacitor in capacitive proximity sensors?
The amplitude of the oscillator increases, increasing voltage
What is the main advantage of incremental encoders over absolute encoders?
Easier interfacing due to fewer outputs
In a load powered sensor wiring scheme, how is the circuit completed?
The load is connected to ground
Which type of sensor is a Sourcing type (PNP sensor) in line powered wiring?
PNP sensor
How many wires are there in a line powered sensor wiring scheme?
Three wires
What is an important consideration when using load powered sensors?
Exceeding the current limit
Which wire of a load powered sensor is connected to power?
The second wire
What is the function of the second wire in a load powered sensor wiring scheme?
To complete the circuit by connecting the load to ground
Which type of sensor allows current flow from load to sensor in line powered wiring?
NPN sensor
What differentiates a Sourcing type (PNP sensor) from a Sinking type (NPN sensor) in line powered wiring?
"The direction of current flow"
Learn about encoders and their applications in Energy System Engineering. Discover the difference between absolute and incremental encoders, as well as common patterns like Gray code, natural binary, and BCD.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
