Local Positioning System (LPS)
LPS sensor nodes communicate with neighbouring nodes using radio frequency chirp signals. Due to the nature of electromagnetic waves, which propagate with the speed of light, the distance between different nodes can be measured by the time of flight of the signal. By applying a cooperative positioning algorithm, the distances between various nodes can be translated to 3D positions.
Data from the LPS is composed of 3D positions for each sensor node, which are attached to structural elements. Hence, displacement of each node due to structural changes can be measured directly in three dimensions. Positioning data is forwarded to the data hubs for aggregation, further processing and visualization by the monitoring system.
High precision in the cm range, low power consumption, low maintenance
Accurate measurement of the sensor node position yields displacement directly.
The LPS sensors allow a direct displacement measurement at critical points of the structure. Because of the small form factor and low power consumption, nodes can be installed mid span on every beam or column within the structure.