Eddy Current Sensor Applications. Eddy Current Sensors and the Industrial Internet of Things.. Inductive eddy current sensors operate by generating a high frequency electro-magnetic field about the sensor coil which induces eddy currents in a target material. A conductive target is required, but a ground connection to the measuring system is not necessary.. applications. Eddy-current sensors provide high resolution measurement for even the dirtiest environments. These advantages have made eddy-current sensors indispensable for many machine builders, production managers, and precision metrology applications. Non-contact, nanometer resolution, high-speed applications are what we thrive on. History. Eddy current testing (ECT) as a technique for testing finds its roots in electromagnetism. Eddy currents were first observed by François Arago in 1824, but French physicist Léon Foucault is credited with discovering them in 1855. ECT began largely as a result of the English scientist Michael Faraday's discovery of electromagnetic induction in 1831.
Eddy current sensors detect the distance or the change to metal objects without contact, dynamically and extremely accurately. The TX electronics which are specially adapted to the respective sensor calculate an analogue output signal proportional to the distance. In addition, there is a USB and CAN interface for reading the data. The sensors are resistant to dirt, pressure and extreme temperatures, it's these features that make eddy current senors one of the best performing sensors in extreme environments. With a maximum frequency response of 100kHz (-3dB) the sensors can operate at high speed in oscillation and vibration applications.
Eddy currents (also called Foucault's currents) are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction.Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an.
Eddy Current Sensors. Inductive Proximity Sensors using the eddy current principle are perfect for applications in harsh environments due to their high insensitivity to oil, dirt, dust, moisture and interference fields. Kaman specializes in inductive, eddy current technology. Our sensors provide non-contact indication of linear position/displacement by outputting an analog voltage, or, in some cases, a current that is proportional to the distance between the sensor face and the target being sensed. Eddy current technology requires an electrically conductive target. It does not need to be […] eddy current proximity sensor Formula. The target material must be at least three times thicker than the effective depth of the eddy currents to make the transducer successful because the transducer assumes that the eddy currents are localized near the surface of a semi-infinite solid and the actual eddy current amplitude decreases quadratically with distance. The sensors are resistant to dirt, pressure and extreme temperatures, it's these features that make eddy current senors one of the best performing sensors in extreme environments. With a maximum frequency response of 100kHz (-3dB) the sensors can operate at high speed in oscillation and vibration applications.
