Real-time detection of storm sewer system overflows during torrential downpours
Fujitsu Laboratories Ltd. has succeeded in the real-time detection of early signs of storm sewer system overflows during torrential downpours, thereby obtaining data for effective analyses. The data was collected in a sensing system field trial initiated in July 2015 with the City of Koriyama in Japan's Fukushima Prefecture. The field trial also tested the effectiveness of energy harvesting technology that converts small amounts of energy from the natural environment into electricity. In this case, a highly efficient thermoelectric module was developed that is able to convert temperature differences into energy. These modules were attached to the bottoms of the manhole covers, and it was confirmed that they could generate levels of electricity sufficient for the stable operation of sensors over long periods. As a result, because there is no need to undertake the work of replacing batteries for five years or more, the trial demonstrated stability in sensing system...