Smart-Screw-Connection-Sensor-Layer-Dashboard
Intelligent screw connection: the DiaForce® layer measures the pre-tensioning force of the screw connection, which is visualized on the adjacent tablet.
Intelligent-Screw-Connection-Sensor-Layer
Intelligent screw connection: the DiaForce® sensor layer measures the pre-tensioning force of the screw connection.
Smart-Screw-Connection-Properties
Intelligent screw connection: tamper-proof, wireless and energy self-sufficient.

Smart Screw Connection

Screw connections are a widespread and standardized joining technology and represent a simple, efficient and universal assembly option. They are aused at critical points such as on bridges, wind turbines or machinery on production lines. These crritical points in particular often require permanent monitoring of the screw connection's quality and reliability.

Wireless and self-powered monitoring of screw connections

The smart screw connection is a fully integrated IoT device that enables wireless and energy-independent monitoring of screw connections. The DiaForce® layer integrated into the sensor makes it possible to determine the preload force of the screw connection as well as the temperature at the assembly location in order to detect pressure changes on the screw. The acquired sensor data is transmitted wirelessly and securely to a cloud-connected monitoring entity using mioty® transmission technology. Before assembly, the screws are configured in the FunkeyBox tamper-proof programming unit, where they are each given their own key. This makes their sensor data attack-proof during transmission to the base station or the backend. Energy harvesting guarantees an independent power supply. Inside the screw is a thermogenerator that generates electrical power from the smallest temperature gradients at the screw’s connection, which makes sensor operations energy-independent and self-powered. Alternatively, the sensor and transmitter can be powered by a solar cell or battery. 

Outstanding features of the »Smart Screw Connection«:

  • DiaForce® sensor layer system for high-resolution measurement of static and dynamic forces and temperatures
  • mioty® LPWAN radio transmission to ensure energy-efficient, reliable data transmission over long distances with a high number of radio nodes communicating in parallel
  • Energy harvesting technology and energy management for independent operation using power from the environment, without battery changes or wired power supply
  • Robust interfaces for configuration and status requests via RFID interface or LPWAN return channel
  • Innovative antenna technology for efficient communication even in metallic environments
  • Tamper-proof sensors thanks to hardened hardware
  • Secure communication with the lowest possible energy consumption using efficient cryptographic calculations
  • Secure commissioning thanks to efficient distribution of individual keys (FunkeyBox)
  • Sensor characterization and optimization of the screw geometry

How does the »Smart Screw Connection« work?

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The »Smart Screw Connection« is a fully integrated IoT device with energy self-powered and wireless data transmission.

Find out more about the »Smart Screw Connection«, in which an integrated thin-film sensor system detects minimal changes in the preload force, transmits them wirelessly to a control unit and thus registers early detection of the loosening of a screw connection - wherever critical screw connections are used.

The most important questions – answered briefly!

Privacy warning

With the click on the play button an external video from wwww.youtube.com is loaded and started. Your data is possible transferred and stored to third party. Do not start the video if you disagree. Find more about the youtube privacy statement under the following link: http://www.youtube.com/t/privacy_at_youtube

Screw connections at critical points often require permanent monitoring of quality and reliability.

Project manager Dr. Peter Spies answers the most important questions about the »Smart Screw Connection«, e.g. which technologies are used, what the advantages of using it are and which applications are possible.

 

Main features

Wireless

  • Secure configuration via radio
  • Sensor layer for static and dynamic force and temperature measurement
  • mioty® for energy-efficient and reliable data transmission

Self-powered

  • Intependent operation of the sensors thanks to energy harvesting
  • Lowest possible power consumption enabled by micro-energy management

Tamper-proof

  • Location-independent, secure configuration of several screws thanks to a mobile, protected environment (FunkeyBox)
  • RFID as interface for individual identification and configuration

Please contact us!

For the extension of our research project, we are looking for you! You are in search of a suitable monitoring solution for screw connections? Do you want to enter the digital age together with us? Then write to us!