2023
DOI: 10.1088/1361-6498/acb955
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Nonsinusoidal in situ electric field caused by magnetic deactivator device for EAS labels—assessment of field strength inside a detailed anatomical hand model

Abstract: To evaluate the localized magnetic field (MF) exposure of the cashier’s hand due to a particular de-magnetization device (deactivator) for single-use labels of an acousto-magnetic (AM) electronic article surveillance (EAS) system, comprehensive measurements of MF near the surface of the deactivator and numerical computations of the induced electric field strength Ei were performed in high-resolution anatomical hand models of different postures and positions with respect to the deactivator. The measurement resu… Show more

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Cited by 4 publications
(8 citation statements)
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“…A novel scaling method is proposed, which allows a WPM-TD-based assessment of Ei(t) of non-sinusoidal time course, based on results from computations at a single frequency with common frequency domain numerical techniques under certain assumptions [2]. If these assumptions are met, as in the investigated case for exposure of the hands caused by a deactivator for singleuse EAS labels, the method can contribute to an efficient and reliable exposure assessment with respect of the ELV.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…A novel scaling method is proposed, which allows a WPM-TD-based assessment of Ei(t) of non-sinusoidal time course, based on results from computations at a single frequency with common frequency domain numerical techniques under certain assumptions [2]. If these assumptions are met, as in the investigated case for exposure of the hands caused by a deactivator for singleuse EAS labels, the method can contribute to an efficient and reliable exposure assessment with respect of the ELV.…”
Section: Discussionmentioning
confidence: 99%
“…The deactivation pulse of the investigated EAS deactivator is of non-sinusoidal shape [2]. For exposure scenarios like this, several different assessment methods have been proposed in recent years [3,4].…”
Section: Introductionmentioning
confidence: 99%
“…Figure 1 shows the numerical model of the deactivator and the time course of the de-magnetisation impulse, in terms of the magnetic induction, measured with a 3 cm 2 probe (for the ELT 400 device, Narda Safety and Test Solutions, Pfullingen, Germany) at the surface of the deactivator (probe position above the deactivator coil). The magnetic induction generated by the numerical deactivator model was validated by corresponding measurements on the real device, and the deviations between simulated and measured magnetic flux density in the region of interest were less than 10% (Schneeweiss et al 2023).…”
Section: Considered Magnetic Field Sourcementioning
confidence: 98%
“…A deactivator (de-magnetiser) for single-use EAS labels was used as a typical and widely used source of occupational and intense magnetic field exposure of the hand and forearm. The considered deactivator model has been experimentally and numerically analysed previously and was described in detail in Schneeweiss et al (2023). Briefly, this type of device is usually built into the cash desk and contains a detection coil and a de-magnetisation coil.…”
Section: Considered Magnetic Field Sourcementioning
confidence: 99%
“…Details of human anatomy feature in a welcome paper on the dosimetry of non-ionising radiations by Schneeweiss et al (2023). This focuses on localised exposure of the hand to the types of demagnetisation units typically used in retail applications.…”
mentioning
confidence: 99%