| 摘要 |
<p>A surface mounted monitoring system is useful for detecting the presence of both ordinary and excessive loads on a surface, and for providing real-time or near real-time trending data. The system includes an irregular array 110 of force transducers on the surface of a structural member such as a roof. In an exemplary embodiment, transducers may be placed on an interior surface, such as embedded within insulation. The force transducers detect the magnitude of a load force acting on the external surface. A data analysis module 120 (DAM) records force readings in a circular memory buffer, so that recent data can be recovered in the event of a catastrophic collapse. The DAM also communicates with a monitoring device 160 that can display real-time loading data to a user and perform other analysis. The DAM monitors two progressive force exceeding thresholds for each transducer by polling the transducer at regular intervals of less than one second. If the force detected by a particular transducer exceeds a first threshold for that particular transducer, the DAM enters an alert state and sends an alert signal on the transmitter 130. If the forced sensed by a transducer exceeds a second threshold the DAM enters an alarm state and sends an alarm signal on the transmitter to the real time warning system 140 so that people in the building can be evacuated before the roof collapses.</p> |
