the eddy current method utilizes high-frequency magnetic fields. the high-frequency magnetic field is generated by flowing a high-frequency current to the coil inside the sensor head. if a measurement target metallic is inserted into this magnetic field, electromagnetic induction causes magnetic flux to pass over the surface of the object
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eddy current . eddy current or capacitive displacement sensor is a non-contact vibration sensor type that generates magnetic fields to measure the change of position in a conductive component. such vibration sensor requires the sensing object to be large enough then the sensor diameter for general sensing to take place. 2. velocity sensor
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eddy current sensors linear position sensors high frequency vibration sensors. the vibration sensor receives its voltage using iepe technology. the sensor requires dc voltage between 15 and 18 v at constant current. this is controlled by a constant-current diode. the output of the vibration sensor is then modulated up to bias voltage
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vibration sensor selection the range of vibration sensors offered is wide, as a vibration sensor has many different characteristics that may vary, including measure - ment related factors such as frequency response, sensitivity and accuracy physical characteristics such as temperature rating, size and connector orientation are also considerations
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vibration measurement. vibration can be considered to be the oscillation or repetitive motion of an object around an equilibrium position. vibrations usually occur because of the dynamic effects of manufacturing tolerances, clearances, rolling and rubbing contact between machine parts and out-of-balance forces in rotating and reciprocating members
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inductive sensors from micro-epsilon are based on the eddy current principle and designed for non-contact measurement of displacement, distance, position, oscillation and vibrations. they are particularly suitable when high precision is required in harsh industrial environments pressure, dirt, temperature
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the working principle of vibration sensor is a sensor which operates based on different optical otherwise mechanical principles for detecting observed system vibrations. vibration-sensor-module the sensitivity of these sensors normally ranges from 10 mvg to 100 mvg, and there are lower and higher sensitivities are also accessible
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an eddy current sensor is a non-contact sensor which measures position or displacement changes of a conductive targetmaterial. non-contact vibration sensors not all vibration sensors require
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design of displacement sensor manufactured by the bently-nevada corporation uses electromagnetic eddy current technology to sense the distance between the probe tip and the rotating machine shaft. the sensor itself is an encapsulated coil of wire, energized with high-frequency alternating current ac. the magnetic field produced by the coil induces eddy currents in the metal shaft
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an eddy current sensor is a relative non-contact sensor. it measures the vibration displacement or amplitude of an object by changing the distance between the sensor end and the measured object. the eddy current sensor has the advantages of wide frequency range 0-10 khz, large linear working range, high sensitivity, and non-contact measurement
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the performance of the vibration measurement system was validated against the eddy current sensor through compari sons between t he frequency spectr a from t he two systems . figure 5 show
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the eddy current method utilizes high-frequency magnetic fields. the high-frequency magnetic field is generated by flowing a high-frequency current to the coil inside the sensor head. if a measurement target metallic is inserted into this magnetic field, electromagnetic induction causes magnetic flux to pass over the surface of the object
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the sensor coil is the main component of an eddy current sensor. in this work the manufacturing technique of the sensor coil was changed in order to meet the requirement that such a sensor works at high temperature. the novel ltcc technology was applied to fabricate these eddy current
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