DEPARTMENT OF MECHANICAL ENGINEERING

Measurement of Temperature Temperature is the measurement of the hotness and coldness of a body. It is measured with the help of a device called thermometer. The three units in which temperature is measured are Celsius, Fahrenheit, and Kelvin. Hence, there are three different scales for measuring temperature. Every unit can be converted to another unit with the help of a conversion formula that we are going to study in this lesson. What Is Temperature? The definition of temperature says that it is a measure of the hotness and coldness of a body. It is not easy to give an exact definition of temperature. Based on our physiological sensations, we can express the level of temperature qualitatively with words like hot, cold, warm, etc. Temperature is simply an average measure of the kinetic energy for particles of matter, the more is their kinetic energy, the higher the temperature of the body/object. Measurement of Temperature Measurement of temperature describes the process of measuring ...

 Ultrasonic flow meter Working principle Ultrasonic flowmeter is an instrument that measures flow by detecting the effect of fluid flow on ultrasonic beams (or ultrasonic pulses). According to the principle of signal detection, ultrasonic flowmeters can be divided into propagation velocity difference methods (direct time difference method, time difference method, phase difference method and frequency difference method), beam offset method, Doppler method, cross-correlation method, and spatial filtering method. and noise method, etc. Ultrasonic flowmeters are the same as electromagnetic flowmeters. Because there are no obstructions in the flow channel of the instrument, they are both unobstructed flowmeters. They are a type of flowmeter suitable for solving difficult problems of flow measurement, especially in large-diameter flow measurement. The advantages. Advantages: Non-contact measurement is possible; Measurement without flow obstruction and no pressure loss; It can measure non...

 Dynamometer A dynamometer, or dyno, is a force measuring device. Different scientists invented different dynamometers. George Graham and John Desagulier invented the Graham-Desaguliers Dynamometer in 1719. It measures the moment of force, torque or power generated by a motor or engine or other prime movers that rotates. It also measures a machine’s power and torque, such as a pump, using driving or motoring dynamometers. Passive or absorptive dynamometers are constructed to drive, and those that can both drive and absorb are called active or universal dynamometers.  What is a dynamometer? A dynamometer consists of the following parts: An absorption unit measures torque and speed of rotations. The absorption unit contains a type of rotor. The rotor is attached to the engine, and it rotates at a specific speed needed. A breaking torque is also developed; it can be hydraulic, frictional, electromagnetic, or according to the absorption unit’s type. The dyno housing is the outer c...

  Computational engineering is a field that leverages computational techniques and tools to solve complex engineering problems. It integrates principles from engineering, computer science, and applied mathematics to model, analyze, and optimize systems and processes. Key aspects include: 1. Simulation: Creating computer models of physical systems to predict their behavior under various conditions. This involves solving complex mathematical equations that describe the system’s dynamics, such as fluid flow, structural mechanics, or thermal processes. 2. **Numerical Methods**: Developing and applying algorithms to approximate solutions to mathematical problems that cannot be solved analytically. Common methods include finite element analysis (FEA), computational fluid dynamics (CFD), and finite difference methods. 3. **Optimization**: Using computational techniques to find the best possible solution to a problem, such as minimizing costs or maximizing performance, subject to constrain...

Torque measurement using  Stroboscope Method Principle of Stroboscope Method When a shaft is connected between a driving engine and driven load, a twist (angular displacement) occurs on the shaft between its ends. This angle of twist is measured and calibrated in terms of torque. Construction of Stroboscope Method The main parts of the mechanical torsion meter are as follows: A shaft which has two drums and two flanges mounted on its ends as shown in the diagram. One drum carries a pointer and other drum has a torque calibrated scale. A stroboscope is used to take readings on a rotating shaft. Operation of Stroboscope Method: One end of the shaft of the torsion meter is connected to the driving engine and its other end to the driven load. An angle of twist is experienced by the shaft along its length between the two flanges which is proportional to the torque applied to the shaft. A measure of this angle of twist becomes a measure of torque when calibrated. The angular twist caused...

 Computer Aided Inspection Using Robots Robots can be used to carry out inspection or testing operation for mechanical dimension physical characteristics and product performance. Checking robot, programmable robot, and co-ordinate robot are some of the types given to a multi axis measuring machines. These machines automatically perform all the basic routines of a CNC co ordinate measuring machine but at a faster rate than that of CMM. They are not as accurate as p as CMM but they can check up to accuracies of 5micrometers. The co-ordinate robot can take successive readings at high speed and evaluate the results using a computer graphics based real time statistical analysis system. Integration of CAD/CAM with Inspection System       A product is designed, manufactured and inspected in one automatic process. One of the critical factors is in manufacturing equality assurance. The co-ordinate measuring machine assists in the equality assurance function. The productivity ...