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| 1 | +## :fontawesome-solid-file-invoice:{ .lg .middle } A new 3D force platform and calibration method |
| 2 | + |
| 3 | +This work introduces a novel 3D force platform design grounded on the use of planar uniaxial load cells and ball wheels, easy to |
| 4 | +manufacture from off-the-self components leading to an affordable and accurate system. An accompanying open-sourced software |
| 5 | +allows an easy use of the force platforms. |
| 6 | + |
| 7 | +A novel calibration method for 3D force platforms is proposed, whose setup uses a |
| 8 | +Smith-type bodybuilding machine, a triaxial load cell and a pole, allowing in-situ calibration and the application of multidirectional |
| 9 | +loads, including those exceeding body weight. The calibration matrix is obtained by applying least squares and cross-validation |
| 10 | +methodology. |
| 11 | + |
| 12 | +Experimental results show good accuracy for the vertical force and COP position, with average relative errors in the |
| 13 | +vertical and horizontal forces under 0.2 % and 2.0 %, respectively. The mean absolute error in the COP position is 0.30 mm in the |
| 14 | +x-axis and 0.28 mm in the y-axis. Additionally, the good performance of the force platform is demonstrated through its practical |
| 15 | +application in gait analysis. |
| 16 | + |
| 17 | +<figure markdown="span"> |
| 18 | + { width="100%" } |
| 19 | + <figcaption>Article graphical abstract</figcaption> |
| 20 | +</figure> |
| 21 | + |
| 22 | +[:fontawesome-solid-file-half-dashed: Preprint article](http://ssrn.com/abstract=5226079){ .md-button .md-button--secondary } |
| 23 | + |
| 24 | +<br> |
| 25 | + |
| 26 | +## :fontawesome-solid-book:{ .lg .middle } Software development and calibration of a force platform for Sports Science |
| 27 | + |
| 28 | +[Author](https://github.com/AaronPB)'s master's thesis in industrial engineering at the University of Almería |
| 29 | + |
| 30 | +This work aims to develop the data acquisition software and calibration procedure of a |
| 31 | +new triaxial force platform, based on uniaxial load cells with force decoupling between |
| 32 | +them, ensuring an accurate reading of the normal load to each cell. |
| 33 | + |
| 34 | +The software allows synchronized recording of signals from the force platform, along |
| 35 | +with other sensors used in biomechanical analysis such as encoders, inertial sensors, |
| 36 | +and cameras. Additionally, it offers a set of tools available to researchers and Sports |
| 37 | +Science professionals to visualize and analyze data directly from the software. |
| 38 | + |
| 39 | +<figure markdown="span"> |
| 40 | + { width="100%" } |
| 41 | + <figcaption>Developed software: Force Platform Reader</figcaption> |
| 42 | +</figure> |
| 43 | + |
| 44 | +Check the master's thesis in spanish by clicking the button below. |
| 45 | + |
| 46 | +[:fontawesome-solid-graduation-cap: Institutional repository *(available soon)*](#){ .md-button .md-button--secondary } |
| 47 | + |
| 48 | +<br> |
| 49 | + |
| 50 | +## :fontawesome-solid-file-contract:{ .lg .middle } Utility Model - Triaxial force platform based on uniaxial load cells |
| 51 | + |
| 52 | +Utility Model number ES1312312, requested by the universities of Almería and Seville. |
| 53 | + |
| 54 | +__Inventors__ |
| 55 | + |
| 56 | +- Javier López Martínez |
| 57 | +- Aarón Raúl Poyatos Bakker |
| 58 | +- Silvia Sánchez Salinas |
| 59 | +- José Luis Blanco Claraco |
| 60 | +- José María Muyor Rodríguez |
| 61 | +- Daniel García Vallejo |
| 62 | + |
| 63 | +<figure markdown="span"> |
| 64 | + { width="100%" } |
| 65 | + <figcaption>Interior of the designed force platform</figcaption> |
| 66 | +</figure> |
| 67 | + |
| 68 | +[:fontawesome-solid-globe: OEPM Utility Model](https://consultas2.oepm.es/InvenesWeb/detalle?referencia=U202431233&trk=public_profile_certification-title){ .md-button .md-button--secondary } |
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