Mobile sensing on municipal vehicles gives a city broad outdoor coverage at low marginal cost — the fleet is already driving every street. It says nothing, however, about the indoor spaces where people spend most of their time. When ventilation became a public health concern, the gap between what the fleet measured and what the city needed to know widened sharply.
The sensing system in Fujisawa began with sensor-equipped refuse collection vehicles and was extended during the pilot into fixed indoor settings: restaurant ventilation, bus ventilation and university classroom air quality. All of it runs on the same secured platform, so the extension inherited device hardening, encrypted transport and authenticated cloud access rather than needing its own security model.
The value here is less any single sensor than the demonstration that a secured urban sensing platform can absorb new sensing contexts without being re-engineered — mobile and fixed, outdoor and indoor, on one stack.
– Mobile sensing from municipal refuse collection vehicles
– Fixed indoor sensing: restaurant and bus ventilation
– University classroom air quality monitoring
– Shared secure platform across mobile and fixed deployments
– Extension without re-engineering the underlying security model
Deployed in Fujisawa, Japan as part of M-Sec Use Case 3, building on the sensing fleet Keio University has operated with the city since the ClouT and BigClouT projects. The indoor ventilation strand proved timely, coinciding with the period in which ventilation became a matter of public health attention.
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