Introduction to sensors and transducers, differences. Force sensors, pressure sensors, strain gauges and practical applications. While a sensor is a device that, as its name signifies, measures a physical quantity and then. Sensors and signal processing lecture 1 sensors and transducers measurement is an important subsystem of a mechatronics system. Difference between sensor and transducers basis for comparison sensor transducer definition senses the physical changes occurs in the surrounding and converting it into a readable quantity. Oan551 sensors and transducers syllabus notes question. Many early sensors converted by transduction a physical measurand to mechanical energy. The output devices or actuators are leds, displays, lamps and fiber optics. Machinery fault diagnosis and signal processing by prof. Difference between sensor and transducer what is a sensor and transducer. Nptel mechanical mechatronics and manufacturing automation module 2.
Introduction to mechatronics, sensors and transducers. Sensors and transducers are often used under environmental conditions, they are sensitive to environmental inputs such as pressure, motion, temperature, radiation and magnetic fields. Difference between sensor and transducer is something that many people are often confused with and needs to be brought into light. Sketch and explain the principle of operation of a optical type displacement sensor. Mechatronics me591 sensors, transducers and actuators. The characteristics of the sensors and transducers and the operating principles of transducer technologies have been discussed in considerable detail. Pdf chapter 3 sensors and transducers1 tasfaye hailu. It converts electromagnetic energy into electricity when it receives signals and does the opposite when it transmits strain gauges. Explore prime new internship new upload login register. These are physical devices that are used in electrical and electronic gadgets and are often encountered by mechanics. Frequency 50 khz wavelength 7 mm sensor diameter 40 mm max range 10 m. Notes for sensors and transducers st by anita mohanty. Mohanty,department of mechanical engineering,iit kharagpur.
Characteristics of transducers transducers and sensors. Usually a transducer converts a signal in one form of energy to a signal in another transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities energy, force, torque, light, motion, position. Its main function is to collect the information on system status and to feed it to the microprocessors for controlling the whole system. When the transducer converts an electrical signal into. Notes for sensors and transducers st by verified writer. For the love of physics walter lewin may 16, 2011 duration. Sensors subject to heat, cold, shock, humidity etc. Analyze the sensor output and do the appropriate necessary conversions.
What is transducer transducers and sensors electronic. A transducer is a device which transforms a nonelectrical physical. Instrumentation and control tutorial 2 sensors and primary transducers this tutorialprovides an overview of instrument sensors used in process and automatic control. Sensors and transducers note pdf download lecturenotes. This device is analogus to a limit switch in mechanical systems. Unit 10 introduction to transducers introduction to. A free powerpoint ppt presentation displayed as a flash slide show on id. This chapter focuses on temperature sensors and thermal transducers. The measurement of flow in a plant is important for the control of the process and for troubleshooting problems that may occur. It is usually employed as a device to detect when a fluid travelling in a pipe is over a specified volumetric flow rate. This wire becomes a transducer with appropriate electrodes and inputoutput mechanism attached to it. Home sensors and transducers notes for sensors and transducers st by verified writer. S bharadwaj reddy december 31, 2016 august 14, 2019.
Anna university oan551 sensors and transducers notes are provided below. Sensor and transducers unit1 by prashant mani tripathi 2. The transducer is a device which, when actuates transforms the energy from one form to another. Introduction to transducers, introduction to transducers. Although they may seem synonyms, they vary in their usage as the temperature sensors depend on changes that take place in materials as their temperatures change. Sensors and transducers characteristic transducers converts the form of energy a microphone coverts sound energy into electrical energy a speaker converts electrical.
Introduction to transducers introduction to types of transducers. Transducers definition,types,passive and active transducer. The signal produced or reflected by the sensor is binary 2 analog sensors. Some of the most commonly used sensors and transducers for different stimuli the quantity to be measured are. Nptel provides elearning through online web and video courses various streams. A transducer is a device that converts energy from one form to another. The signal produced by the sensor is continuous and proportional to the measurand.
So, now transducers be contain a primary sensing element also or they may. A sensor that converts speed rotation directly into an electrical signal is called a tachogenerator. Name two methods of noncontact type speed sensing and. For sensing light, the input devices or sensors are photo diode, photo transistor, light dependent resistor and solar cells. Difference between sensor and transducer with applications. Sensors characteristic are described in terms of seven properties. It makes a brief description of the system diagram of temperature sensor module first and then takes lm75 temperature sensor for example to introduce the classification and threshold of sensors. However, if you do have real sensors or real transducers and access to the rs232, gpib or tcpip ports you can see virtual instrumentation in action. Elements of a general measurement system and static characteristics 1 40 dynamic characteristics of measurement systems 41 103 signal and noise in measurement system 104 122 resistive sensing element 123 7 capacitive sensing elements 8 144. However, the introduction of solidstate electronics created new opportunities for sensor development and control. Some sensor technologies age and their response will naturally change over time requiring periodic recalibration. Demonstrate theoretical, practical and soft skills by working in the laboratory to test transducers and instruments.
One of the significant difference between the sensor and the transducer is that the sensor senses the physical changes occur in the surrounding whereas the transducer converts the physical quantity or nonelectrical into another signal or electrical signal. 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. Solidstate sensors mems sensors sensor calibration ece 445. 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. Sensors and transducers introduction course presentation classification of transducers transducer descriptions transducer parameters, definitions and terminology transducer effects in silicon and other materials tadeusz stepinski, signaler och system 1.
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