KEYWORDS: Sensors, Silicon, Microcontrollers, Commercial off the shelf technology, Data storage, Data processing, Sensor networks, Wheatstone bridges, Bridges, Humidity
The MEDEA+ SWANS (Silicon Platform for Wireless Advanced Networks of Sensors) project aims at defining a generic
silicon platform, integrating analogue and digital Intellectual Property (IP) blocks for wireless sensor nodes technology.
This generic platform will be used in various applications, such as transportation (aeronautics, automotive), homeland
security, environmental and health/fitness. In the aeronautical application, the platform monitors, continuously, aircraft
structures to detect whether a crack exists or not and process the data in real time, inside the platform. Measurements are
provided by an inductive sensor glued on a structure and are acquired during flights. The sensor impedance (real and
imaginary parts) varies depending on the state of the part area on which it is stuck. For example, this sensor aims at
monitoring the further evolution of the crack too. The data are transmitted from the sensor to an ARM microcontroller
through an electronic conditioner. Then, they are analysed and stored in a non volatile memory. Data measurements are
collected by a RF transmission, every 2 or 4 months. A 3D stack platform demonstrator that allows the use of different
technologies, will be realised, fully tested and characterised.
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