How does an eddy current sensor work?
How does an eddy current sensor work?
Eddy Current Sensors work in magnetic fields. The driver creates an alternating current in a sensing coil at the end of a probe. The alternating current then creates an alternating magnetic field which induces smaller currents within the target material, these currents are referred to as Eddy Currents.
How do displacement sensors work?
A Displacement Sensor is a device that measures the distance between the sensor and an object by detecting the amount of displacement through a variety of elements and converting it into a distance.
Which sensor can be used to measure displacement?
Inductive sensors (eddy current) for displacement, distance & position. Eddy current sensors from Micro-Epsilon are designed for non-contact measurement of displacement, distance, position, oscillation and vibrations.
Which type of material can be detected by Eddy current position sensor?
Explanation: Eddy current type displacement sensor can detect metal objects because it uses high frequency magnetic field for the detection of objects.
What is Eddy current and its application?
Strong eddy currents are set up in the metal produce so much heat that the metal melts. This process is used in extracting a metal from its ore.The arrangement of heating the metal by means of strong induced current is called the induction furnace. (2)-Induction motor, the eddy currents may be used to rotate the rotor.
What are three different ways to measure displacement?
This chapter discusses the various sensing methods used for displacement measurement. Common terms are introduced followed by the two most common forms of displacement interferometry: homodyne and heterodyne. Double pass, differential and swept-frequency absolute distance interferometers are also covered.
Which is not a type of position sensor?
LVDT position sensor is a capacitive type of position sensor. Explanation: LVDT is not a capacitive type of position sensor.
How is displacement measured in an eddy current sensor?
［For laboratory evaluations］. An eddy-current noncontact displacement sensor. Measures the displacement of the target (electrical conductor) to the sensor with high accuracy. It can measure static displacement to high-speed phenomenon, and can be applicable to measurement of displacement, thickness, eccentricity measurement, etc.
How does the eddy current principle of detection work?
Principle of detection The eddy current type displacement sensors produce a high-frequency magnetic field by applying a high-frequency current to the coil inside the sensor head. The sensors are adjusted so that a standard sensing object is 0 V when in a direct contact and 5 V when at the maximum sensing range (full scale).
What causes an eddy current in a sensor head?
If there is a measurement object (metal) within this magnetic field, then excess current is produced around the magnetic flux that passes through the object surface due to the electromagnetic induction effect. This changes the impedance of the coil within the sensor head.
Which is the best eddy current temperature sensor?
Eddy current sensors have superior temperature stability and resistance towards pressure, temperature, dirt and oil. Capable of operating at pressure up to 4000 bar, they are one of the best wear-free, non-contact sensors for measuring displacement and position in harsh industrial environment.