Post on 06-Apr-2018
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NAMES MATRIC NUMBER
RAAJAPANNDIYAN
THANKADURAI
15DEM10F1044
SATHISWARANRAMESHWARAN
15DEM10F1068
TRILOSHANAN S/OARUMUGAM
15DEM10F1074
JEEVAN RAJ S/OTAMIL SELVAN
15DEM10F1063
15DEM10F10
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INTRODUCTION
Sensor and transducer are widely used in the description ofmeasurement systems.
'sensor' is a device that detects a change in a physical
stimulus and turns it into a signal which can be measured orrecorded.
'transducer' is a device that transfers power from one systemto another in the same or in the different form. (converting energy)
'sensor' 'to perceive'
'transducer' ' to lead across'
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SENSOR CLASSIFICATION
Sensor classification schemes range from verysimple to the complex.
One good way to look at a sensor is to consider
all of its properties, such as;
-stimulus
-specifications
-physical phenomenon
- conversion mechanism
-material and application field.
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In machine tools, sensor's conversion phenomenaare mainly physical phenomena such as;
thermoelectric
photoelectric
photo magnetic
Electromagnetic and so on.
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TYPESOFSENSORMicrowave Sensor The Microwave Sensor uses radar technology to detect the
disturbance of, or mass movement in its field of operation.
Detection produces a contact closure. This technology isresistant to false detentions caused environmental conditions.
Its small size allows the Microwave Sensor to be mountedalmost anywhere.
This allows the Microwave Sensor be hidden behind plastic,wood, fibre glass, cloth, glass, etc and not effect the aestheticsof your installation.
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Small form factor,
Minimal power requirement
Microwave technology
Does not require line of sight
Adjustable sensitivity
Contact closure output
Key Features:
Microwave Sensor
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Photoelectric sensor
A photoelectric sensor, is a device used to detect thedistance, absence, or presence of an object by using alight transmitter, often infrared, and a photoelectricreceiver.
There are three different functional types:
opposed(through beam)
retro reflective
proximity-sensing (diffused).
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Sensing Modes ( photoelectric sensor) Opposed
An opposed (through beam) arrangement consists of a receiver
located within the line-of-sight of the transmitter.
In this mode, an object is detected when the light beam is blockedfrom getting to the receiver from the transmitter.
A Retro Reflective A retro reflective arrangement places the transmitter and receiver at
the same location and uses a reflector to bounce the light beam backfrom the transmitter to the receiver.
An object is sensed when the beam is interrupted and fails to reach
the receiver.
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Its arrangement is one in which the transmitted radiationmust reflect off the object in order to reach the receiver.
In this mode, an object is detected when the receiver
sees the transmitted source rather than when it fails tosee it.
Some photo eyes have two different operational types,light operate and dark operate. Light operate photo eyes -> "receives" the transmitter signal Dark operate photo eyes -> does not receives the
transmitter signal
A proximity-sensing(Non-contact sensor )
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VISUALSENSOR
A visual sensor network is a network of spatiallydistributed smart camera devices capable of processingand fusing images.
Visual sensors
Charge Injection Device(CID)
Charge-coupled Device (CCD)
CCD from a 2.1 megapixel Argus digital
camera.
http://en.wikipedia.org/wiki/File:ArgusCCD.jpg8/3/2019 Sensor and Transducer
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CCD from a 2.1 megapixel Hewlett-Packard digital camera
http://en.wikipedia.org/wiki/File:2.1_MP_CCD_Close_Up.JPG8/3/2019 Sensor and Transducer
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LASERSENSOR
Its is used for generating, amplifying andconcentrating light waves into powerful beam.
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TRANSDUCER
a device that converts one type of energy toanother.
Energy types include electrical, mechanical,
electromagnetic, chemical, acoustic or thermalenergy.
While the term transducer commonly implies the
use of a sensor/detector, any device which convertsenergy can be considered a transducer.
Transducers are widely used in measuringinstruments.
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APPLICATIONS OF TRANSDUCERS
Electromagnetic: Magnetic cartridge converts motion into electrical form
Tape head converts changing magnetic fields into electrical
form
Hall effect sensor converts a magnetic field level into electricalform only
Electrochemical:
Electro-galvanic fuel cell
Hydrogen sensor
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Electromechanical;
Electroactive polymers
Potentiometer when used for measuring position
Load cell converts force to mV/V electrical signal usingstrain gauge
Electrostatic: Electrometer
Thermoelectric: Resistance temperature detector (RTD)
Thermocouple
Radio acoustic: Receiver (radio)