Thanks to their extensive experience in the development of radiofrequency circuits and antenna designs, Fraunhofer IIS is able to offer in-depth know-how in the field of wireless transmission. Especially in the field of telemetry technology, the institute is well positioned to help you develop the right telemetry system addressing your needs and to develop individual solutions to your problems.
Bolted connections on applications like infrastructure, mobility, energy generation, process industry and mining are exposed to high loads. Wear and tear and impacts from temperature variations or vibrations can decrease the stability of the jointed bolt connections. Regular inspection is therefore required for all relevant connections. The smart screw connection Q-Bo® enables wireless, self-powered monitoring of the preload force using a retrofittable sensor system for DIN bolts. A sensor measures the force on the bolted joint with the help of a piezoresistive thin-film layer. The data is processed and transmitted permanently to a cloud using the mioty® wireless protocol. The integration of energy harvesting technologies enables self-powered operation, whereby the electrical energy required can be generated from minimal temperature differences or using small solar cells on the system. Deviations in the preload force of bolted joints can thus be detected immediately by remote monitoring with the smart screw connection Q-Bo®. In this way, downtime or maintenance can be reduced and serious damages will be avoided completely.
Q-Bo® is a product of a joint initiative of 4 Fraunhofer Institutes within the Fraunhofer Cluster of Excellence Cognitive Internet Technologies CCIT.
Technical Key Facts
Preload force and temperature measurement
5-10% accuracy of the measured preload force
Completely self-powered operation by energy harvesting
Additional vibration measurement up to 3.2 kHz
Transmission distance up to 15 km
Programming over RFID