Speaker
Description
Within the framework of Brighter project new multispectral (MS) microbolometers are designed, developed and integrated in new infrared camera prototypes. These prototypes are implemented and tested on various use-cases. In the present study, the Sense-City (https://sense-city.ifsttar.fr/) large scale facility was selected to conduct experiments on urban small cities buildings and roads in controlled and monitored environment.
A first campaign of experimentation in the SenseCity large scale Climatic chamber was realized. Two tiny cities were investigated, one in controlled climatic conditions (Tiny City 1) and the other one in natural environmental conditions (Tiny City2).
During experimentations, three controlled climate conditions were imposed over the Tiny City 1 and listed below:
• Tair +22°C and 50% HR
• Tair +30°C and 80%HR
• Tair +10°C and 80%HR
Experimentations over the Tiny City 2 were conducted under natural climate.
During these experiments, surface temperature probes were added to the existing in-situ ones to collect complementary measurements (for instance: additional surface temperature, local relative humidity, …) for different built surface of interest studied in the Tiny City 1 & 2. Furthermore, a prototype of portable emissometer developed in collaboration THEMAC Ingenierie, equipped for the v1 version with only 4 spectral bandwidth capabilities was also tested in operation for the first time.
The 4 spectral bandwidths implemented in the portable emissometer prototype are:
1. 8.73-10.21 µm (Cuton – Cutoff 5%)
2. 9.46 - 12.34 µm (Cuton – Cutoff 5%)
3. 2.96 – 5.06 µm (Cuton – Cutoff 5%)
4. 11.63 – 13.01 µm (Cuton – Cutoff 5%)
During these experimentations, MS camera prototypes were operated with and without a 6 positions filter wheel equipped with 5 spectral band filters.
A double characterization of the different urban building surfaces positioned in different climatic conditions MS camera measurements with BRIGHTER algorithms and emissivity measurements using the portable emissometer prototype were conducted.
A first analysis of preliminary results obtained will be proposed and discussed. Focus, on few built spectral surfaces will be also discussed. Conclusion and perspectives addressing the generation of a public dataset for the community will be introduced.
Acknowledgments
Authors wish to thank Jean-Pierre Monchau from THEMACS Ingenierie for the development of the 4 spectral bands portable emissometer prototype in the framework of BRIGHTER project. BRIGHTER project has received funding from the Chips Joint Undertaking (Chips JU) under grant agreement N°101096985. The JU receives support from the European Union’s Horizon Europe research and innovation program and France, Belgium, Portugal, Spain, Turkey
