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Electronics 3 > Transducers > Flashcards

Transducers Flashcards

(66 cards)

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1
Q

An electronic device that converts energy from one form to another.

A

Transducers

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2
Q

Process of converting energy from one form to another

A

Transduction

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3
Q

Output obtained from transducers is always in the _____ form.

A

Electrical

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4
Q

What are the main types of transducers?

A

Active Transducer
Passive Transducer

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5
Q

Does not require any power source in order to function

A

Active Transducers

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6
Q

Needs an external power source to operate

A

Passive Transducer

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7
Q

Is a passive transducer which varies the voltage of the electrical output from the cell when a torque is applied

A

Torque Transducer

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8
Q

Is a passive transducer which will vary the resistance of the cell when light falls on it.

A

Photocell

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9
Q

Is a passive transducer used to measure stress or pressure

A

Bonded Strain Gauge

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10
Q

Types of Transducers Based on Quantity to be Measured

A

Temperature Transducers
Pressure Transducers
Displacement Transducers
Oscillator Transducer
Flow Transducers
Inductive Transducers

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11
Q

Converts the thermal quantity into any physical quantity

A

Temperature Transducers

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12
Q

Types of Temperature Transducers

A

-Contact Temperature Sensor Types
-Non-Contact Temperature Sensor Types
-Thermistor
-Resistance Thermometers
-Thermocouples
-Integrated Circuit Temperature Transducers

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13
Q

The sensing element in this is in direct contact with the thermal source

A

Contact Temperature Sensor Types

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14
Q

The sensing element in this is not in direct contact with the thermal source

A

Non-Contact Temperature Sensor Types

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15
Q

What heat transfer is used in Contact Temperature Sensor Types?

A

Conduction

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16
Q

What heat transfer is used in non-contact sensor types?

A

Convection

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17
Q

The resistance changes with the change of temperature

A

Thermistor

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18
Q

Precision temperature sensors made from high-purity conducting metals

A

Resistance Thermometers

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19
Q

Resistance of Thermistors

A

0.5 to 0.75M

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20
Q

Consists of 2 junctions of dissimilar metals, such as copper and constantan that are welded

A

Thermocouples

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21
Q

A phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the 2 substances

A

Seebeck Effect

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22
Q

transducer that use the temperature sensing element with monolithic electronic circuits as a combination for the measurement of temperature.

A

Integrated Circuit Temperature Transducers

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23
Q

Is a temperature sensitive zener diode

A

LM335

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24
Q

Used to measure pressure

A

Pressure Transducer

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25
Measures large displacements such as brake pedal travel or pneumatic actuator displacement
Linear Variable Dependent Transducers (LVDT)
26
Used to measure force, pressure or displacement by converting it to a voltage.
Oscillator Transducer
27
Parts of an Oscillatory Transducer
Mechanical Linkage Oscillator Frequency Modulator Force Summing Member
28
Used to link the input quantity to the secondary transducer
Mechanical Linkage
29
Used to generate desired frequency
Oscillator
30
Used for modification of output frequency from the oscillator for telemetry purpose
Frequency Modulator
31
Is used to change the capacitance or inductance of an LC oscillator circuit
Force Summing Member
32
Used to measure air and liquid flow velocity
Flow Transducers
33
Works by measuring the amount of a liquid, gas, or steam flowing through or around the flow meter sensors
Flow Meter
34
Types of Flow Meters
Capillary Thermal Mass Immersible Thermal Mass Vortex Shedding Transit-Time Ultrasonic
35
Thermal heat is transferred between gas passing through a very small tube and a set of resistance temperature detectors (RTDs) to measure the mass flow of the gas.
Capillary Thermal Mass
36
uses the thermal heat transferred from a heated sensor immersed in the flow to measure the mass flow of the gas
Immersible Thermal Mass
37
Measures mass and/or volumetric flow of liquids, gases, and steam using vortices shed from a sensor immersed in the flow and a computed fluid density
Vortex Shedding
38
measure speed of a fluid passing through a pipe using ultrasound.
Transit-Time Ultrasonic
39
Is the self-generating type otherwise the passive type transducer.
Inductive Transducer
40
Types of Inductive Transducers
Simple Inductance Two-coil Mutual Inductance
41
A simple single coil is used as a transducer
Simple Inductance
42
two different coils are arranged
Two-coil Mutual Inductance
43
Types of Transducers Based on Principle of Operation
Photovoltaic Piezoelectric Transducer Chemical Mutual Induction Electromagnetic Hall Effect Photoconductor
44
Converts light energy to electrical energy
Photovoltaic
45
Classification of Photoelectric Transducers
Photo-emissive Cell Photovoltaic Cell Photo-conductive Cell Photodiode Phototransistor
46
Is based on the emission of electrons when the transducer is exposed to sunlight.
Photo-emissive Transducer
47
Consists of an anode rod and a cathode plate enclosed in a vacuum glass tube.
Vacuum Phototube
48
It is the most popular and most widely used photo-emissive transducer.
Photomultiplier
49
Is also known as a solar cell. It converts electromagnetic radiation into an electrical signal.
Photovoltaic Cell
50
It works on the principle of photoconductive effect.
Photo-conductive Cell
51
acts as a light-sensitive device and converts the illuminated light into an electrical signal.
Photodiode
52
Are similar to regular NPN or PNP or FET transistors with three layers but with a light-sensitive base region.
Phototransistor
53
is a device that uses the piezoelectric effect to measure changes in acceleration, pressure, strain, temperature or force by converting this energy into an electrical charge.
Piezoelectric Transducer
54
Behaves in the reverse manner of the piezoelectric sensor. It is the one in which the electric effect will cause the material to deform
Piezoelectric Actuator
55
Who discovered piezoelectric effect?
Pierre and Jacques Curie
56
states that when mechanical stress or forces are applied on quartz crystal, produce electrical charges on the quartz crystal surface.
Piezoelectric Effect
57
is anything that produces sound.
Buzzer
58
depends on acoustic cavity resonance to produce an audible beep.
Piezoelectric Buzzer
59
It transforms the energy into some form of analytical signal.
Chemical
60
is a device that measures and detects chemical qualities in an analyze and converts the sensed chemical data into electronic data.
Chemical Sensor
61
Is the component of the chemical sensor that comes into physical contact with the analyze
Receptor
62
In this type, two coils are used. One for generating excitation and another for output.
Mutual Induction
63
Is a transducer for non-contact acoustic wave generation and reception in conducting materials.
Electromagnetic acoustic transducer (EMAT)
64
It is used for measuring the magnetic field by converting the field into an emf
Hall Effect
65
It converts the magnetic field into an electric quantity, readily estimated by the analog and digital measures.
Hall Effect Transducer
66
It is employed to convert light energy into electrical energy. It is composed of semiconductor substance.
Photoconductor

Electronics 3 (16 decks)

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