⢠Alternatively, a Transducer is defined as a device which provides usable output response to a specific input measured which may be a physical quantity. Because of this broad definition, transducers come in many varieties converting many different types of energy. The transducers convert the physical forces into an electrical signal which can easily be handled and transmitted for measurement. <> II. Basically, Transducer converts one form of energy into another form of energy. IV. Resistance sensors are mainly used for the measurement of parameters such as displacement, pressure, force, strain, ⦠D)M!ABÅKÖjTÒñr9eQû,ìH¸. <> Convex Transducers. <> Sign In Join. 2 0 obj In general, the process of transduction involves the conversion of one form of energy into another form. Active and passive transducers. This will make the measurement system very compact. 10.2 Active and Passive Sensors 10.3 Basic Requirements of a Sensor/Transducer 10.4 Discrete Event Sensors 10.4.1 Mechanical Limit Switches 10.4.2 Proximity Limit Sensors 10.4.3 Photoelectric Sensors 10.4.4 Fluid Flow Switch 10.5 Transducers 10.5.1 Position Transducers 10.5.2 Velocity Transducers 10.5.3 Force or Pressure Transducers 36 Sensor classification â physical effect transducers (sensors) employ physical effects to convert a stimulus from a signal domain to another signal domain in \ out radiation mechanical thermal electrical magnetic chemical radiation photo luminance radiation pressure radiation heating photo-conduction photo-magnetic photo-chemical Also, selective quenching of fluorescence may be the basis of such devices. Transducers which require an external power source for their operation is called as a passive transducer. 10. Even though the image resolution decreases when the depth increases. 2. We will see a few examples of sensors shortly. Classification of Transducers based on transduction Principle. 1 Classification of transducers Active Transducer The transducers, which develop their output in form of electrical voltage or current In the first classification of the sensors, they are divided in to Active and Passive. %PDF-1.5 Classification of Transducer Once certain basic functions common to all instruments have been identified, then we see if it is possible to make some generalization on how these functions may be performed. The following classification of sensors may already be used by an expert in the subject but this is a very simple classification of sensors. II-Characteristics of different types of sensors a) Active vs. 1 0 obj It is quite difficult to determine the exact magnitude of the physical forces like temperature, pressure, etc. Passive: Does sensor draw energy from the signal ? ⢠An TV antenna is a transducer where electromagnetic energy is transformed and reproduced in to electrical energy. This is the first type of classification ⦠They produce an output signal in the form of some variation in resistance, capacitance or any other electrical parameter, which than has to be converted to an equivalent current or voltage signal. Classification of transducers - View presentation slides online. The broad availability of smartphones and Inertial Measurement Units in particular brings them into the focus of recent research. 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