It is the smallest hand force sensor of its kind in the world. This sensor can be used to measure motor functions in patients undergoing rehabilitation. It can also be used to measure the actual loads involved when performing physical labour. Alternatively, it can monitor the performance of athletes, such as javelin throwers or shot putters, to help them improve their technique. The prototype is complete and Robert Brookhuis, a PhD student at the University of Twente, is in talks with industry to bring the product to market. He will be awarded his PhD on 17 October.
This force sensor is extremely flat. Smaller than a fingertip, it can measure the forces exerted by your hand. A hand is a powerful tool. It can be used to grasp objects and move them in many ways, such as rotating, or sliding over a flat surface. It can even be used to deliver a punch. None of the sensors that are currently available on the market are small enough to measure the forces exerted between fingers and the objects they are gripping. This makes Mr Brookhuis’ hand force sensor the first of its kind.
Many applications
A sensor as small as this can be built into gloves and prostheses, for example, as well as bicycle pedals, shoe soles, or touch screens. In addition to measuring total force, the sensor can measure the direction in which a force is applied, something that is important for a wide range of applications.
PhD thesis
Robert Brookhuis’ PhD thesis describes the design, fabrication and characterization of force sensors that are suitable for the applications mentioned. These sensors are designed to measure the interaction forces exerted on a hand while it is manipulating objects. When used in combination with hand-mounted motion sensors, it is possible to estimate the mechanical power exerted during a given procedure. This system can then be used to optimize manual tasks. It is therefore well suited for use in sport, as well as for learning how to carry out a given task in the context of rehabilitation.
STW Demonstrator
The research has been so successful that Mr Brookhuis has been awarded an STW demonstrator grant to develop the fruits of his research into a robust prototype. This has sparked the interest of companies who are keen to bring this product to market.
Further details
Robert Brookhuis defended his thesis, entitled “Miniature Force-Torque Sensors for Biomechanical Applications”, at 16:45 on Friday 17 October, on the University of Twente’s campus. His doctoral degree defence was open to members of the public. The PhD thesis is available as a free download to the press and other interested parties. The research project was carried out within the MESA+ institute and the MIRA institute.
