This is an quick example on how WSN solution applied to Bridge. We deploy some WSN devices on bridge pier with a slope sensor after the site survey. These devices are used to detect if there is any abnormal slide of bridge pier.
The signal of slope sensor with raditional wired solution decays a lot if the length of bridge goes over 2km. Multi-hopping is useful in this case so the topology doesn't necessary to be star. With 3G/GPRS supported of gateway, mechanic is able to read all the meters of every bridge pier remotely. It cuts labor costs and solve the possible signal decay at the same time.
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