slides-03 - SENSORS AND TRANSDUCERS FALL 2004 MKM 503E...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 1 SENSORS AND TRANSDUCERS
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 2 Sensor: The term sensor is used for an element which produces a signal relating to the quantity being measured SENSORS AND TRANSDUCERS Transducer: The term transducer is often used in place of the term sensor. Transducers are defined as elements that when subject to some physical change experience a related change. SENSOR=TRANSDUCER A measurement system may use transducers in addition to the sensor, in other parts of the system to convert signals from to another.
Background image of page 2
FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 3 PERFORMANCE TERMINOLOGY Range and Span: Range of a transducer defines the limits between which the input can vary. The span is the maximum value of the input minus the minimum value. Example: a load cell is used to measure forces might have a range of 0 to 50 kN and ists span is 50 kN Error: Difference between the result of the measurement and the true value of the quantity being measured. Error = measured value – true value Example: If a measurement gives a temperature reading of 25 °C when the actual temperature is 24 °C, the error is +1 °C.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 4 Accuracy: Accuracy is extent to which the value indicated by a measurement system might be wrong. It is thus summation of all possible errors that are likely to occur, as well as the transducer has been calibrated. Example: A temperature-sensing instrument might be specified as having an accuracy of ± 2 °C. This means that the measurements can be expected to lie between + or - 2 °C of the true value. Accuracy is is often expressed as a percentage of the full range output or full scale deflection. Example: accuracy of ± 5 % of full range output, full range is 0 to 200 °C reading can be expected to be within + or -10 °C of the true reading.
Background image of page 4
FALL 2004 MKM 503E MECHATRONIC SYSTEM COMPONENTS 5 Sensitivity: The relationship indicating how much output you get per unit input. sensitivity = output/input Example: A resistance termometer’s sensitivity is 0.5 / °C.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/21/2011 for the course EE ee taught by Professor Ee during the Spring '10 term at Istanbul Technical University.

Page1 / 45

slides-03 - SENSORS AND TRANSDUCERS FALL 2004 MKM 503E...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online