Group presentation for Mechatronics Components and Instrumentation -MSc course at Tampere University of Technology, Finland

1. Konstruktiotekniikka
Mechatronics Components and Instrumentation
(MSc Course: EDE-31206)
Selection of Sensors
Mithun Chowdhury
Tomáš Spáčil
16/11/2013

2. Konstruktiotekniikka
DESIGN PROCESS

Distinguish into 6 major phases
•
Conceptual design
•
Preliminary design
•
Detail design and development
•
Construction
•
Operation use
•
Retirement

Sensors are necessarily part of almost all phases

3. Konstruktiotekniikka
REQUIREMENTS

Summarizing possible future application of the system

Measurement principles
•
Environment
•
Size, weight

Sensing method
•
Resolution, range, frequency,...
•
Output
•
Cost

Best compromise

4. Konstruktiotekniikka
SENSOR x TRANSDUCER

Sensor produce a signal relating to the physical
quantity being measured.

Transducer converts one type of energy to another
form of energy.
•
Transducer consists of a sensor and electronic circuit.
•
Output from of a transducer is normally voltage (V) or current (A).

5. Konstruktiotekniikka
ROTATIONAL
•
Potentiometer
•
Resolvers
•
Magnetic / optical encoders
•
Capacitive encoders
•
Inductive encoders

6. Konstruktiotekniikka
TEMPERATURE

7. Konstruktiotekniikka
MAGNETIC
•
Hall sensor
•
Magnetoresistive sensor
•
Magnetodiode
•
Induction coil
•
SQUID

8. Konstruktiotekniikka
Sensor Topology
 Sensitivity
 Range
 Precision
 Resolution
 Accuracy
 Offset
 Linearity
 Hysteresis
 Response Time
 Dynamic Linearity

9. Konstruktiotekniikka
 Sensitivity
• defined as the input parameter change required to produce a
standardized output change
 Range
• is the maximum and minimum values of applied parameter that can be
measured
 Precision
• refers to the degree of reproducibility of a measurement
 Resolution
• is the smallest detectable incremental change of input parameter that
can be detected in the output signal.
Sensor Topology

10. Konstruktiotekniikka
 Accuracy
• maximum difference that will exist between the actual value (which
must be measured by a primary or good secondary standard) and the
indicated value at the output of the sensor
 Linearity
• is an expression of the extent to which the actual measured curve of a
sensor departs from the ideal curve.
 Response Time
• Sensors do not change output state immediately when an input
parameter change occurs. Rather, it will change to the new state over a
period of time, called the response time.
Sensor Topology

11. Konstruktiotekniikka
Choose the Right Sensor for an Measurement System
Depend on
 Temperature
 Strain
 Sound
 Vibration
 Position and Displacement
 Pressure
 Force

12. Konstruktiotekniikka
Mechatronics Components and Instrumentation
(MSc Course: EDE-31206)
Thanks for your attention!
Mithun Chowdhury
Tomáš Spáčil
16/11/2013