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Inductive Transducers with 2D Microcoils in Reflection Differential Transmitter-Receiver Mode for the Micro Non-Destructive Testing of Grinding Burn

  • Microfabricated 2D inductive eddy-current transducers operating in a reflection differential transmitter-receiver mode are presented for the micro nondestructive detection of micro grinding burn. 2D spiral circular microcoils are employed as excitation coils, while an innovatively conceptualized “interconnected split-D” type differential microcoil is used as a sensing coil. Finite element modelling using COMSOL revealed the efficacy of proposed concept in non-destructive testing of small grinding burn having a width of 100 µm. The induced sensing coil voltage changed as a function of presence of grinding burn, with successful recording of the signal for the investigated lift-off range of 250 µm - 1000 µm for 100 kHz to 1 MHz driving frequencies of excitation coil. Experimental validation showed a 94% increase in the induced voltage of the sensing coil in presence of grinding burn on increasing the driving frequency of excitation coil from 100 kHz to 1 MHz. Thereby, revealing the superficial nature of the grinding burn defect, and showing the efficacy of the proposed concept for the non-destructive testing of grinding burn.

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Author:Mohammed I. KhaziORCiDGND, Andras KovacsORCiDGND, Ulrich MeschederORCiDGND
Parent Title (English):The 21st International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2021, 20 - 25 June 2021, online virtual conference
Document Type:Conference Proceeding
Year of Completion:2021
Release Date:2021/08/30
Tag:2D differential microcoils; Eddy-current transducers; Grinding burn; Micro non-destructive evaluation
First Page:1202
Last Page:1205
Open-Access-Status: Closed Access 
Licence (German):License LogoUrheberrechtlich geschützt