Eddy current is circular current which is induced by a conductor when it is kept in a changing magnetic field. Eddy current sensors are used as proximity sensors to detect the presence or absence of non-magnetic conductive material. It is a non-contact sensor (see Figure 1).
Measurements & Instrumentation
What is Spring Balance? Construction, Working Principle, Diagram, Formula & Advantages
Spring balance is a force measuring device which works on the principle of Hooke’s law. According to Hook’s law, the force acting on the spring (along the axis of the spring) is directly proportional to the displacement of the spring, in the direction of the force.
What is Bevel Protractor? Working, Construction, Diagram & Uses
Figure 1: Bevel Protector. A bevel protractor is an angle measuring instrument, consisting of the following parts as shown in figure 1 A fixed measuring blade An adjustable blade Body and Turret Working of Bevel Protector A bevel protractor is used to measure angle between the two faces of a component. The fixed measuring blade … Read more
What is Mechanical Tachometer? Working Principle, Types & Diagram
Mechanical Tachometer uses mechanical parts in their construction. Therefore, the speed is measured with the help of movement in the mechanical parts of the tachometer.
What is Hydraulic Load Cell? Working, Diagram, Advantages & Disadvantages
Figure 1: Hydraulic Load Cell.
The principle of operation of hydraulic load cell is when a force is applied on a liquid medium, the pressure of the liquid increases. This increase in pressure is a measure of the applied force when calibrated. The figure 1 shows the basic schematic representation of hydraulic load cell. It is also known as a hydraulic plunger.
What is Mechanical Torsion Meter? Working & Diagram
Figure 1: Mechanical Torsion Meter.
Mechanical torsion meter contains a shaft mounted between two drums and two flanges. One drum is provided with a torque calibrated scale and the other has a pointer (see Figure 1).
What is Michelson Interferometer? Working, Diagram & Construction
Michelson interferometer or DC laser interferometer is the oldest device. It utilizes monochromatic light from an extended source, and works on the principle of interference.
What is Coordinate Measuring Machine (CMM)? Working, Parts, Advantages & Applications
Coordinate measuring machine (CMM) is one of the most important equipment used in the contact type inspection process of parts. It is a flexible measuring machine widely used in manufacturing industries for post production inspection of components.
What is Strain Gauge Accelerometer? Working Principle, Construction & Diagram
Fig. 1: Strain Gauge Accelerometer.
Working Principle of Strain Gauge Accelerometer
When acceleration to be measured is applied to a cantilever beam whose movable end is attached to a seismic mass, the mass vibrates, which causes the cantilever beam to deflect and get strained. This strain is proportional to the vibrational displacement of the seismic mass and hence the applied acceleration.