{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T19:24:29Z","timestamp":1771874669715,"version":"3.50.1"},"reference-count":20,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2018,3,21]],"date-time":"2018-03-21T00:00:00Z","timestamp":1521590400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000266","name":"Engineering and Physical Sciences Research Council","doi-asserted-by":"publisher","award":["EP\/M507842\/1"],"award-info":[{"award-number":["EP\/M507842\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The investigation of planar coils of differing topologies, when combined with a magnetostrictive amorphous ribbon to form a stress-sensitive self-inductor, is an active research area for applications as stress or pressure sensors. Four topologies of planar coil (Circular, Mesh, Meander, and Square) have been constructed using copper track on 30 mm wide PCB substrate. The coils are energized to draw 0.4 A and the resulting magnetic field distribution is observed with a newly developed three-dimensional magnetic field scanner. The system is based on a variably angled Micromagnetics\u00ae STJ-020 tunneling magneto-resistance sensor with a spatial resolution of 5\u201310 \u00b5m and sensitivity to fields of less than 10 A\/m. These experimental results are compared with the fields computed by ANSYS Maxwell\u00ae finite element modelling of the same topologies. Measured field shape and strength correspond well with the results of modelling, including direct observation of corner and edge effects. Three-dimensional analysis of the field shape produced by the square coil, isolating the components H(x) and H(z), is compared with the three-dimensional field solutions from modelling. The finite element modelling is validated and the accuracy and utility of the new system for three-dimensional scanning of general stray fields is confirmed.<\/jats:p>","DOI":"10.3390\/s18040931","type":"journal-article","created":{"date-parts":[[2018,3,22]],"date-time":"2018-03-22T05:14:55Z","timestamp":1521695695000},"page":"931","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Comparison between Modelled and Measured Magnetic Field Scans of Different Planar Coil Topologies for Stress Sensor Applications"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5776-2263","authenticated-orcid":false,"given":"Robert","family":"Gibbs","sequence":"first","affiliation":[{"name":"Cardiff School of Engineering, Cardiff University, Queen\u2019s Buildings, Cardiff CF24 3AA, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gregory","family":"Moreton","sequence":"additional","affiliation":[{"name":"Cardiff School of Engineering, Cardiff University, Queen\u2019s Buildings, Cardiff CF24 3AA, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4608-0507","authenticated-orcid":false,"given":"Turgut","family":"Meydan","sequence":"additional","affiliation":[{"name":"Cardiff School of Engineering, Cardiff University, Queen\u2019s Buildings, Cardiff CF24 3AA, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4901-6164","authenticated-orcid":false,"given":"Paul","family":"Williams","sequence":"additional","affiliation":[{"name":"Cardiff School of Engineering, Cardiff University, Queen\u2019s Buildings, Cardiff CF24 3AA, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,3,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1801","DOI":"10.1109\/TIE.2008.2010110","article-title":"Design and test of a high-power high-efficiency loosely coupled planar wireless power transfer system","volume":"56","author":"Low","year":"2009","journal-title":"IEEE Trans. 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