Consider the following transducers or transducer systems : (a) Float elements (b) Seismic system (c) Gyroscope Arrange the above transducers/systems in decreasing order of the availability of possible number of output signals.
(b), (c), (a)
The question asks how many distinct quantities each device can be made to deliver.
(b) Seismic system — the most. A spring-mounted mass inside a case is a genuinely versatile instrument, because which quantity it reports depends on where its natural frequency sits relative to the motion being measured:
| Operating region | Output represents |
|---|---|
| ω ≫ ωn | displacement (vibrometer) |
| ω ≈ ωn | velocity (with suitable damping) |
| ω ≪ ωn | acceleration (accelerometer) |
One mechanical arrangement, three different measurands — and it needs no external reference, since the inertia of its own mass provides one.
(c) Gyroscope — fewer. A spinning rotor gives an inertial reference direction, from which angular displacement and angular rate can be derived, and with three axes it supplies attitude information in roll, pitch and yaw. So it offers more than one output, but they are all angular quantities — a narrower set than the seismic instrument's displacement, velocity and acceleration.
(a) Float element — fewest. A float rides on a liquid surface and its position follows the level. It measures essentially one thing: liquid level (from which volume follows trivially for a known tank shape). Simple, cheap and robust — but a single-purpose device.
Decreasing order: (b), (c), (a).
The principle behind the ranking. The versatility of a transducer depends on how many independent physical effects it can be arranged to sense. A device with an internal dynamic system — a mass and spring, or a spinning rotor — has frequency-dependent behaviour that can be exploited in several regimes, whereas a purely geometric element such as a float has only one mode of operation.
Hence, the decreasing order is (b), (c), (a).
Similar Questions
Which of the following transducers are not linear ?
i. thermistor
ii. thermocouple
iii. IC sensorWhich of the following sensors has excellent linearity ?
Consider the following statements associated with electrical and electronic transducers
A. Little power is consumed by transducer
B. Mass intertia effects are not minimized
C. The response time is small
D. Transmission and processing the signal for the purpose of measurement are easier.
Choose the correct answer from the options given below:
Incorrect statements regarding measurement are given :
A. Hot wire anemometer is used to measure displacement
B. Hall effect is used to measure current
C. LVDT is used to measure acceleration and gas flow
D. Piezoelectric Transducer is used to measure acceleration
Choose the correct answer from the options given below:
Match List I with List II
LIST I LIST II A. Relative error I. The ability of tde device to give identical O/P when repeated measurements are made witd tde same I/P signal B. Precision II. The ratio of difference between measured value and tde true value to tde true value of tde measurand C. Caliberation III. The smallest increment in measure tdat can be detected witd certainity by tde instrument D. Resolution IV. The process of making adjustments or tde scale so tdat tde instrument reading conform to an accepted standard. Choose the correct answer from the options given below:
Match the following lists :
List – I List – II a. Electromechanical Device i. Seismic Device b. Optical Device ii. Piezo-electric c. Gyroscopic device iii. Interferometers d. Absolute motion device iv. Aerospace vehicle Choose the correct answer from the codes given below:
The fundamental law that is used in temperature measurement is known as
Assertion (A) : Normally, some standard signal conditioner and display devices are used with a transducer, unless they are custom-built to suit the requirements of the transducers.
Reason (R) : A transducer is a device which receives energy in one form and transfer it to a convenient form.
Select your answer using the codes given below :
The mechanical elements that are used to convert the applied force into a displacement are called :
A device used to convert a non-electrical quantity into an electrical signal is called :
Important Questions from Basics of Transducers
_____ converts mechanical displacement into electrical signals.
Which of the following transducers are not linear ?
i. thermistor
ii. thermocouple
iii. IC sensorWhich of the following sensors has excellent linearity ?
Consider the following statements associated with electrical and electronic transducers
A. Little power is consumed by transducer
B. Mass intertia effects are not minimized
C. The response time is small
D. Transmission and processing the signal for the purpose of measurement are easier.
Choose the correct answer from the options given below:
Incorrect statements regarding measurement are given :
A. Hot wire anemometer is used to measure displacement
B. Hall effect is used to measure current
C. LVDT is used to measure acceleration and gas flow
D. Piezoelectric Transducer is used to measure acceleration
Choose the correct answer from the options given below:
