HANNOVER MESSE 2019,
01 - 05 April
CiS Forschungsinstitut für Mikrosensorik
CiS Research Institute is currently developing a new silicon-based MEMS sensor to verify safety-related screw connections. Such special screws are used in mechanical engineering, conveyor technology and wind turbines, e.g.
The new sensor is applied to the screw head and measures its deformation caused by the screw pre-tensioning force. Not to be confused with the torque, the screw pre-tensioning force affects the parts to be connected between the thread and the screw head. It causes an elastic deformation in all parts of the screw. At the screw head, this deformation is quite easy to measure. Up to now the strain on the screw could only be determined by measuring its length or attaching strain gauges at the screw shaft. These solutions lend themselves specifically to the evaluation of single screws. The MEMS sensor developed by CiS Research Institute consists of four piezo-resistive, strain-sensitive measurement resistors which are switched to a Wheatstone bridge. The active surface without the electrical connections amounts to no more than (200 x 200) µm² with a thickness of 10 µm (fig. 1). The sensor is joined to the screw head using glass solder. A FEM-analysis determined the most suitable position on the screw head (fig. 2).
German Pavilion - Thuringia
A new hybrid micro-assembly center expands the technological basis for the development of advanced solutions for the fully automated assembly of application-specific ...
The outstanding long-term stability, the high reliability and measuring accuracy as well as the chemical resistance of the media-contacting surfaces are the hallmarks ...
With stacked silicon photodiodes and refined optical thin film filters, spectrally sensitive detectors can be developed that can replace conventional, expensive ...
CiS Research Institute has expanded its opto-electronic skills to be able to develop multispectral UV light sources for fluorescence or absorbance measurements. ...
The CiS Research Institute has developed a tiny microchip for the determination of the direction of incident light. The small design and the easy integration as ...