IBS is developing a wireless force sensor aimed at enabling in-line, high-speed precision force measurement with high dynamic performance at the point of application, for example directly at a tool tip in automated systems such as pick-and-place equipment. The sensor concept uses an elastic element with a diffractive structure, comparable to a hologram. When light hits this structure, it is reflected in different directions. When a force is applied, the elastic element deforms slightly, changing the spacing of the diffractive pattern. With the help of position-sensitive sensors, this change can be detected and converted into the deformation of the material and therefore into the applied force.
Optical force sensor test setup
As part of the project, a team of Fontys students was tasked to investigate alternative materials and manufacturing methods suitable for this sensing principle. During the collaboration, IBS worked closely with the team while they designed and developed several prototype solutions. These prototypes were tested and evaluated using our test setup.
The research resulted in a new material composition that makes it possible to transfer a diffraction grating with sufficient optical quality onto a new elastic material. The developments in the production process also provided new insights for the engineers at IBS. This result gives us a solid basis and a step forward for further development and a clear direction towards final production. The next step is improving the accuracy of the diffraction grating.
The students were able to apply subjects such as material science and manufacturing in practice in this precision engineering challenge. "It was a unique experience to work with innovative and experimental materials." - said one of the students. Due to the hands-on approach of both the students and IBS, new materials and material combinations were discovered. Because of the broad possibilities and the open nature of the assignment, the students were able to explore different solutions in depth, which led to many new insights through a critical selection of materials. Within the limited time, the students delivered a well-founded research and result that IBS can build on.
The students were very satisfied with the result of the project and were very happy with the opportunity and support they received from IBS during the project. A unique assignment that allowed them to apply their academic knowledge into practice, combined with a pleasant and productive collaboration.