Nptel provides elearning through online web and video courses. Nptel provides elearning through online web and video courses various. Mod01 lec17 sensors and transducers tutorial of machinery fault diagnosis and signal processing course by prof a. Lecture series on industrial instrumentation by prof. Optosensors active sensors with emitterdetector pairs in single package. The streaming video of the 2016 lecture may eventually be here. Sensors and transducers paperback august 15, 2004 by d. Ideally there should be a straight line relationship so that equivalent changes in input produce the same order of change in output no matter where within the sensors range these occur.
No transducer is sensitive to one physical energy only consider a small volume dv in which transducer is placed the energy content dw in this volume contains the summation of all possible energies ii intensive quantity can carry power, e. A sensor is assumed to be linear so that its response y to a stimulus x is idealised to have the form. Jan 01, 2003 the characteristics of the sensors and transducers and the operating principles of transducer technologies have been discussed in considerable detail. Jun 23, 2016 classification of transducers transducers on the basis of principle used activepassive primarysecondary analoguedigital capacitive inductive resistive transducers inverse transducers transducers may be classified according to their application, method of energy conversion, nature of the output signal, and so on. The contact motion can be translation, rotation, or a combination of the two, thus allowing measurement of rotary and translator displacements. But, people fail to make a difference between sensor and transducer. Besides covering conventional sensors such as electromechanical, thermal, magnetic, radiation, and electroanalytical, the recent advances in sensor technologies including smart and intelligent.
Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Sensors and transducers are often used under environmental conditions, they are sensitive to environmental inputs such as pressure, motion, temperature, radiation and magnetic fields. In the meantime, log on to sakai, go to the hm engr80. Transducer and sensors transducer a device that converts a primary form of energy in to a corresponding signal with a different energy form primary energy forms. Mohanty,department of mechanical engineering,iit kharagpur. Different sensors adding features gyroscope l3gd20 measures the angular rate s monostructure, high stability, compact magnetometer lsm303dlhc senses the magnetic field gauss compact, sip, low consumption accelerometer lis3dh senses the linear acceleration ms2, tilt. The word transducer is the collective term used for both sensors which can be used to sense a wide range of different energy forms such as movement, electrical signals, radiant energy, thermal or magnetic energy etc, and actuators which can be used to switch voltages or currents. Classification of transducers transducers on the basis of principle used activepassive primarysecondary analoguedigital capacitive inductive resistive transducers inverse transducers transducers may be classified according to their application, method of energy conversion, nature of the output signal, and so on. Nptel provides elearning through online web and video courses various streams. Transducers are the physical element which is an active part of a sensor. Transducers xx international conference on solidstate sensors and actuators, oddnumbered years since 1983, proceedings available from ieee us meetings, elsevier european meetings, iee japan japanese. It consists of a r esistance element provided with a movable contact. It is useful to anyone studying measurement systems and instrumentation but it is provided mainly in support of the ec module d227 control system engineering.
Unit 10 introduction to transducers transducers and sensors and sensors structure 10. There are many different types of sensors and transducers. The words sensors and transducers are widely used in association with measurement systems. Unit 10 introduction to transducers introduction to. According to instrument society of america, a sensor is a device that provides usable output in response to a specified quantity which is measured. A spatialsensing array can be considered to be a coordinated group of touch sensors. Sensors and materials myu, japan in english journal of micromechanics and microengineering iop major conference proceedings. Unfortunately, this is a simplified assumption and many sensors and transducers are. Pdf introduction to sensors, actuators and mechatronics. Mar 15, 2020 piezoelectric transducer has high sensitivity. Sensors and transducers for process control sciencedirect. Iicharacteristics of different types of sensors a active vs. Instrumentation and control tutorial 2 sensors and primary transducers this tutorialprovides an overview of instrument sensors used in process and automatic control.
X 2016 tab where x is your section number, 1,2,3, or 4, click on the mediasite link in the left navigation bar, if necessary click on the press here to launch link, and then watch. Optical energy domain, part 2 photoemissive sensors working problems photoemissive sensors. Machinery fault diagnosis and signal processing by prof. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Aug 15, 2004 sensors and transducers paperback august 15, 2004 by d. Sensors and transducers produce output signals, qot, in response to input signals, qit, that characterize the state of the measured system the measurand.
State description of transducers the steady state description reveals characteristics of transducers note. For the love of physics walter lewin may 16, 2011 duration. Mod01 lec17 sensors and transducers video lecture by prof a. The sensor is an element that produces signals relating to the quantity that is being measured. The characteristics of the sensors and transducers and the operating principles of transducer technologies have been discussed in considerable detail. This wire becomes a transducer with appropriate electrodes and inputoutput mechanism attached to it. Its function is to connect sensors one at a time to an analogtodigital ad converter if a sensor produces an analog signal, or directly figure 1. Mod01 lec17 sensors and transducers video lecture by. The piezoelectric effect is used in many application that involve production and detection of sound, electronic frequency generation. Electrical engineering industrial instrumentation nptel. Sensing and sensors rss lecture 4 monday, feb 14 2011 cagdas onal.
Transducers a transducer is a device that converts energy from one form to another energy forms can be mechanical, visual, aural, electrical, thermal, chemical, etc. Accelerometer product focus lis3dh 3axis accelerometer. Sensors and transducers encyclopedia of life support. With the right constructional approaches and design, it is also possible to make these devices fu11fil the requirements already outlined for process control, i. Alok barua, department of electrical engineering,iit kharagpur. Nptel video lectures, iit video lectures online, nptel youtube lectures. In another word, a sensor is a sophisticated transducer which contains signal conditioning.
Introduction to sensors and transducers, differences. Mohanty, department of mechanical engineering,iit kharagpur. This text is a lucid presentation of the principles of working of all types of sensors and transducers which form the prime components of the instrumentation systems. Department of mechanical engineering,iit kharagpur. The main difference between sensor and transducer is, the sensor is a physical device, that senses a physical quantity and then converts it into signals which can be read by an instrument or the user. Optical energy domain, part 2 photoemissive sensors working problems photoemissive sensors data presentation elements 5. Dependences voltage on the difference of temperature for thermocouples. Describe advantages, disadvantages, and applications of limit. History has shown that advancements in materials science and engineering have been important drivers in the development of sensor technologies. Basic concepts about sensors and transducers duration.
Optical energy domain, part 1 oh in pdf oh as eps physics photoeffects in silicon and other materials photoconductive sensors photovoltaic sensors 4. Basics of sensors ebook pdf download siemens step course. Electrical transducers voltage, current, frequency. Industrial instrumentation nptel online videos, courses iit. Electrical signals from the sensors are fed into a multiplexer mux, which is a switch or a gate. Tutorial 2 sensors and primary transducers this tutorialprovides an overview of instrument sensors used in process and automatic control. It acts as ignition source for cigarette lighter and used in sonar. Powered by create your own unique website with customizable templates. Transducers and sensors cp imperial college, autumn 2008 12 the following discussion refers to an implicit linear model for the sensor. This can be achieved either by a specially designed slip sensor or by the interpretation of the data from a touch sensor or a spatial array.
These sensors detect and measure the movement of an object relative to the sensor. This device is analogus to a limit switch in mechanical systems. Because, transducers are sometimes found in sensors. What is transducer transducers and sensors electronic instrumentation and measurement duration. So, it acts as sensor and used in accelero meter due to its excellent frequency of response. Thermoelectric transducer elements transform change of the measured value temperature to change the current, arising from differences in temperature at junction of two dissimilar materials in which there is the seebeck effect fig. Introduction to sensors the national academies press. Physik instrumente usa precision motion control 247,907 views. Fibre optic transducers, whether physical or chemical, are potentially low cost devices.
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