Project outline

In 2004, Pratt & Whitney Canada, a turbojet engine manufacturer, asked François Gagnon to solve a technical problem, specifically, relating to the fact that the measurement of blade deflection in a reaction turbine casing is possible only once the engine has cooled. Of course, high-temperature data collection systems exist, for example, for drilling operations, but they are wired applications. Since the Pratt & Whitney Canada application specifically targets moving parts, it requires a system that is both wireless and able to operate at temperatures as high as 250°C.

Initially, the team analyzed a new set of electronic components resistant to high temperatures. Since this family of components was not designed for wireless communication, it lacked certain strategic functionalities – a considerable obstacle. Finally, by utilizing an “undesirable characteristic” of one of the components (a characteristic that, under normal circumstances, researchers would attempt to mitigate), it was possible to build the first robust transmitter. This modulator, which was the strategic cornerstone of the system’s development, can operate in temperatures up to 260°C without a protective casing.

It is still early days for the current prototype, and many functionalities have yet to be integrated. When the system is ready, the team will be able to develop a complete network of wireless sensors. The system must be robust enough to deal with mechanical stress, vibrations, electromagnetic interference, and, above all, high temperatures.

As part of the sensor network, intelligent and standalone sensor nodes will be placed in fixed or variable locations, allowing users to connect via internet or satellite for the purposes of data collection and processing. Eventually, users will be able to send messages to the sensors to activate a given function or request specific information. The system’s network architecture ensures greater reliability as each node can act as a back-up for any other node in case of connectivity loss.

François Gagnon and his team have begun to market their system to generate a return on this research investment. Many other applications are being explored, and the team is considering launching a company specializing in the building of highly robust transmitter-receivers.

Download the scientific overview (pdf)

Results to date

• Designed and developed a wireless temperature sensor resistant to high temperatures
• Submitted a patent application for a prototype oscillator able to operate at 260°C

Expected results

• Develop a second prototype featuring a microprocessor
• Integrate a microprocessor in the second prototype
• Enable ad hoc network functionality
• Prepare a business plan
• Launch a company to market this new technology

Our partner

• CRSNG

Team members

Professor: François Gagnon
Specialists: Olivier Munger, Jonathan Gagnon, Christian Talbot
Student: Rémi Paquette

CREDITS — © COPYRIGHT 2007 –INFO@COMUNITE.CA