Mohanty, department of mechanical engineering,iit kharagpur. The fine wire is usually arranged in the form of a grid. Sarkar department of chemical engineering,iit kharagpur. Mod01 lec17 sensors and transducers video lecture by prof a. 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. Engineering structures and materials from micro to. 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.
Sensors and transducers for process control sciencedirect. Nptel video lectures, iit video lectures online, nptel youtube lectures. Unit 10 introduction to transducers introduction to. 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. The words sensors and transducers are widely used in association with measurement systems. Sensors and transducers produce output signals, qot, in response to input signals, qit, that characterize the state of the measured system the measurand. This article on sensors and transducers covers types, basic functions and provide links to sensors and transducers. Sensors and transducers displacement and position sensors displacement. Control valve selection tips s bharadwaj reddy january 15, 2017 july 23, 2019.
Position sensors are concerned with the determination of the position of some object in relation to some reference point. Mod01 lec17 sensors and transducers tutorial of machinery fault diagnosis and signal processing course by prof a. Temperature transducers thermocouples resistance temperature detectors rtd thermistors resistive position transducers displacement transducers. Sensors and transducers for controlling the whole system. Sensors and signal processing lecture 1 sensors and transducers. Such transducers are designed for use on both hydraulic and pneumatic. It include temperature sensor,humidity sensor,strain sensor,proximity or occupancy sensor,force or load sensor,voltage and current sensor,pressure sensor,speed sensor,resistance sensor,power sensor,level sensor,event or state sensor etc. Sensors and transducersbasics of sensors and transducers. They are essentially devices which give onoff outputs.
Instrumentation and control tutorial 2 sensors and primary transducers this tutorialprovides an overview of instrument sensors used in process and automatic control. Nptel provides elearning through online web and video courses various streams. Lecture notes on some topics will be provided by the instructor pallasareny ramon, and john g. Powered by create your own unique website with customizable templates. Sensors and transducers pdf free download lecture notes. Transducer transducer transducers for critical aircraft applications for more than 45 years, leading aerospace companies have relied on precision sensors products to monitor and control aircraft. Basic concepts about sensors and transducers duration. Related courses introduction to fluid machines and compressible flow. Tutorial 2 sensors and primary transducers this tutorialprovides an overview of instrument sensors used in process and automatic control. Transducers and sensors cp imperial college, autumn 2008 12 the following discussion refers to an implicit linear model for the sensor. Today a wide variety of these elements and devices are available in the market.
Introduction, strain gauge, torque measurement, thermistor, thermocouples, lvdt, flowmeter, ph and viscosity measurement, dissolved oxygen sensors. This wire becomes a transducer with appropriate electrodes and inputoutput mechanism attached to it. Sensors and transducers displacement, position and. Lecture series on industrial instrumentation by prof.
With the right constructional approaches and design, it is also possible to make these devices fu11fil the requirements already outlined for process control, i. Introduction to sensors the national academies press. Sensors and transducers note pdf download lecturenotes for free. 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. 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. Note of sensors and transducers video tutorial by bhaktishree sathpathy. Pdf introduction to sensors, actuators and mechatronics. 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. In another word, a sensor is a sophisticated transducer which contains signal conditioning. Sensors are used to convert a parameter of interest to a form that is more convenient to use.
Sensors characteristic are described in terms of seven properties. Sensor it is defined as an element which produces signal relating to the quantity being measured. Unit 10 introduction to transducers transducers and sensors and sensors structure 10. Proximity sensors are a form of position sensor and are used to determine when an object has moved to within some particular critical distance of the sensor. Sensors and transducers videos sensors and transducers practical. State description of transducers the steady state description reveals characteristics of transducers note. An ideal sensor should not respond to any parameters other than the parameter it is intended for. For the love of physics walter lewin may 16, 2011 duration. Machinery fault diagnosis and signal processing by prof. Class handwritten notes, exam notes, previous year questions, pdf free download. Alok barua, department of electrical engineering,iit kharagpur.
The most familiar sensors provide an electrical output, but many other kinds of. Optical energy domain, part 1 oh in pdf oh as eps physics photoeffects in silicon and other materials photoconductive sensors photovoltaic sensors 4. Department of mechanical engineering,iit kharagpur. Electrical engineering industrial instrumentation nptel. Electrical signals from the sensors are fed into a multiplexer mux, which is a switch or a gate. An introduction to sensors and transducers definitions of sensor and transducer the words sensor and transducer are both widely used in the description of measurement systems. Download free sample and get upto 48% off on mrprental. Optical energy domain, part 2 photoemissive sensors working problems photoemissive sensors data presentation elements 5. Sensor variable inductance displacement element, the quantity being measured is measurement is an important subsystem of a mechatronics system. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Introduction to sensors and transducers, differences. History has shown that advancements in materials science and engineering have been important drivers in the development of sensor technologies. Transducers are the physical element which is an active part of a sensor. This device is analogus to a limit switch in mechanical systems.
There are many different types of sensors and transducers. Mod01 lec17 sensors and transducers video lecture by. Introduction to transducers, introduction to transducers. Sensors constitute the perceptual system of a robot sensors are physical devices that measure physical quantities what are sensors sensors do not provide state examples. Describe advantages, disadvantages, and applications of limit switches, photoelectric. Basics of sensors ebook pdf download siemens step course. Figure a1 illustrates a simple strain gauge transducer. Industrial instrumentation online course video lectures by. The former is popular in the usa whereas the latter has been used in europe for many years. Fibre optic transducers, whether physical or chemical, are potentially low cost devices.
Lecture notes sensor technologies for interactive environments. According to instrument society of america, a sensor is a device that provides usable output in response to a specified quantity which is measured. The first objective of this course is to understand basics of sensors, actuators and their operating principle. Jan 01, 2003 the characteristics of the sensors and transducers and the operating principles of transducer technologies have been discussed in considerable detail.
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. Sensors and transducers are often used under environmental conditions, they are sensitive to environmental inputs such as pressure, motion, temperature, radiation and magnetic fields. This website uses cookies to improve your experience. Sensors are transducers, in that the incoming property to be measured, e. A sensor is assumed to be linear so that its response y to a stimulus x is idealised to have the form. A strain gauge measures the external force pressure applied to a fine wire. Nptel provides elearning through online web and video courses various. Sensors and transducers, st study materials, engineering class handwritten notes, exam notes, previous year questions, pdf free download. Sensors can be used in all three phases of matter although gas and liquid sensors are the most common.
Besides covering conventional sensors such as electromechanical, thermal, magnetic, radiation, and electroanalytical, the recent advances in sensor technologies including smart and intelligent. Industrial instrumentation nptel online videos, courses. Download pdf of sensors and transducers note electrical and electronics. What is transducer transducers and sensors electronic instrumentation and measurement duration. Sensing and sensors rss lecture 4 monday, feb 14 2011 cagdas onal lecture notes prepared by daniela rus. Smart material, adaptive structures and intelligent mechanical systems iitk. 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.
Jun 23, 2016 position sensors are concerned with the determination of the position of some object in relation to some reference point. The sensors installed into dams structure and in reservoir measure physical quantities of interests such as seepage flow, water level, deformation, pressure and temperature parameters. Lecture 1 introduction to industrial instrumentation by. The sensor is an element that produces signals relating to the quantity that is being measured. Unfortunately, this is a simplified assumption and many sensors and transducers are. Mohanty,department of mechanical engineering,iit kharagpur. Gershenfeld expresses the common understanding related to sensors as transducers.
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