Self-Sensing of a Magnetically Actuated Prism
We demonstrate a method for self-sensing of a magnetically actuated prism that can be used, e.g., in a feedback-loop without the need of additional sensors. In order to use the impedance of the actuation coils as a measurement parameter, we first obtained the optimal measurement frequency that is we...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/12/5493 |
| _version_ | 1797592736142983168 |
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| author | Pascal M. Weber Ulrike Wallrabe Matthias C. Wapler |
| author_facet | Pascal M. Weber Ulrike Wallrabe Matthias C. Wapler |
| author_sort | Pascal M. Weber |
| collection | DOAJ |
| description | We demonstrate a method for self-sensing of a magnetically actuated prism that can be used, e.g., in a feedback-loop without the need of additional sensors. In order to use the impedance of the actuation coils as a measurement parameter, we first obtained the optimal measurement frequency that is well separated from the actuation frequencies and at the same time provides the best compromise between sensitivity to the position and robustness. We then developed a combined actuation and measurement driver, and correlated its output signal to the mechanical state of the prism using a defined calibration sequence. We demonstrate that we can reliably measure the state of each actuator and determine the tilt angle of the prism with an accuracy of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>0.1</mn></mrow></semantics></math></inline-formula><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula> in the polar angle over a range of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>4</mn></mrow></semantics></math></inline-formula><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>20</mn></mrow></semantics></math></inline-formula> mrad in the azimuthal angle. |
| first_indexed | 2024-03-11T01:57:22Z |
| format | Article |
| id | doaj.art-cc121087b1b543b79f4fc1396ff7fe51 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:57:22Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-cc121087b1b543b79f4fc1396ff7fe512023-11-18T12:31:50ZengMDPI AGSensors1424-82202023-06-012312549310.3390/s23125493Self-Sensing of a Magnetically Actuated PrismPascal M. Weber0Ulrike Wallrabe1Matthias C. Wapler2Laboratory for Microactuators, Department of Microsystems Engineering (IMTEK), University of Freiburg, 79085 Freiburg, GermanyLaboratory for Microactuators, Department of Microsystems Engineering (IMTEK), University of Freiburg, 79085 Freiburg, GermanyLaboratory for Microsystems Engineering for Medical Engineering, Faculty of Electrical Engineering and Information Technology, Otto-von-Guericke University Magdeburg, 39016 Magdeburg, GermanyWe demonstrate a method for self-sensing of a magnetically actuated prism that can be used, e.g., in a feedback-loop without the need of additional sensors. In order to use the impedance of the actuation coils as a measurement parameter, we first obtained the optimal measurement frequency that is well separated from the actuation frequencies and at the same time provides the best compromise between sensitivity to the position and robustness. We then developed a combined actuation and measurement driver, and correlated its output signal to the mechanical state of the prism using a defined calibration sequence. We demonstrate that we can reliably measure the state of each actuator and determine the tilt angle of the prism with an accuracy of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>0.1</mn></mrow></semantics></math></inline-formula><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula> in the polar angle over a range of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>4</mn></mrow></semantics></math></inline-formula><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>±</mo><mn>20</mn></mrow></semantics></math></inline-formula> mrad in the azimuthal angle.https://www.mdpi.com/1424-8220/23/12/5493self-sensingcoil impedance measurementmagnetic actuationBi-axial tunable prism |
| spellingShingle | Pascal M. Weber Ulrike Wallrabe Matthias C. Wapler Self-Sensing of a Magnetically Actuated Prism Sensors self-sensing coil impedance measurement magnetic actuation Bi-axial tunable prism |
| title | Self-Sensing of a Magnetically Actuated Prism |
| title_full | Self-Sensing of a Magnetically Actuated Prism |
| title_fullStr | Self-Sensing of a Magnetically Actuated Prism |
| title_full_unstemmed | Self-Sensing of a Magnetically Actuated Prism |
| title_short | Self-Sensing of a Magnetically Actuated Prism |
| title_sort | self sensing of a magnetically actuated prism |
| topic | self-sensing coil impedance measurement magnetic actuation Bi-axial tunable prism |
| url | https://www.mdpi.com/1424-8220/23/12/5493 |
| work_keys_str_mv | AT pascalmweber selfsensingofamagneticallyactuatedprism AT ulrikewallrabe selfsensingofamagneticallyactuatedprism AT matthiascwapler selfsensingofamagneticallyactuatedprism |