Questions and Answers
What is the primary function of a diaphragm in a pressure sensor?
What type of pressure measurement is used to measure the difference in pressure between two points?
What is the purpose of a spring or mechanism arrangement in a diaphragm-based pressure sensor?
What is the principle of operation of a Bourdon tube?
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What is the primary application of pyroelectric sensors?
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What is the advantage of using a diaphragm in a pressure sensor?
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What is the purpose of a calibrated scale in a pressure sensor?
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What is the difference between absolute pressure measurement and differential pressure measurement?
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What is the function of a pointer in a diaphragm-based pressure sensor?
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What type of pressure sensor is commonly used in industrial processes?
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Study Notes
Introduction to Mechatronics Systems
- A mechatronic system combines mechanical, electrical, and software engineering to design and manufacture intelligent systems.
- Characteristics of mechatronic systems: high-quality products, safe, low-cost, portable, produced quickly, serviceable, maintainable, and upgradeable.
Real-Time Applications of Mechatronics
- No specific details provided in the text.
Course Objectives of Automation and Control Engineering
- CO1: Perform one or more processing operations and understand the need for mechatronics systems.
- CO2: Familiarize students with the constructions and working principles of different types of sensors and transducers.
- CO3: Understand the fundamental concepts of electro-mechanics and fluid mechanics (hydraulics and pneumatics) of actuators and drive systems.
- CO4: Impart knowledge on control elements.
- CO5: Understand different control schemes.
Sensors and Transducers
- Introduction to sensors and transducers: performance terminology, types, and selection.
- Classification of sensors/transducers: according to measurement (or) function, according to performance characteristics, according to power supply, and according to the mode of operation.
Displacement Sensors
- Examples of commonly used displacement sensors: potentiometer, strain gauge, capacitive sensors, and linear variable differential transformer.
- Potentiometer: a variable resistance displacement transducer that uses the variable resistance transduction principle to convert displacement or rotation into a potential difference.
Proximity Switches
- A proximity sensor is a sensor that can detect the presence of nearby objects without physical contact.
- Working principle of proximity switches: uses a magnet to attract magnetic reeds, closing the switch contacts.
Velocity and Motion Sensors
- Velocity sensors or tachogenerators give an output proportional to angular velocity.
- Tachogenerator: uses a pick-up coil and a wheel with teeth to measure angular velocity.
- Pyroelectric sensors: work on the principle of pyroelectricity, generating charge in response to heat flow.
Force and Fluid Pressure Sensors
- Strain gauge as force sensor: uses a strain gauge to measure force.
- Pressure sensors: diaphragms, bellows, capsules, and tubes are used to measure fluid pressure in industrial processes.
- Types of pressure measurements: absolute pressure measurement and differential pressure measurement.
- Diaphragm: a metallic diaphragm that deflects in response to pressure, which is connected to a pointer and calibrated scale to indicate the pressure reading.
- Bourdon tube: a tube that tends to straighten out in response to pressure, with the nonlinear motion converted into linear motion or displacement, which is measured using a calibrated scale.
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Description
Test your knowledge of mechatronics engineering, including sensors, control systems, and computer-based systems. Covering advantages, disadvantages, and characteristics of mechatronic systems.
