Sensors used in bridge condition monitoring system

There is a certain challenge in monitoring aging transportation infrastructure and the effects of increasing traffic (loads) on bridges.

Contemporary technologies allow bridge monitoring extricate from periodic human inspections, instead they rely on the electronic monitoring of the structures' health. This allows bridges to be maintained and repaired before any structural integrity problems are able to develop. 

Civil engineers have become completely aware of benefits to be reaped by using sensors to evaluate the condition of infrastructure. It is also economic for cost and budget control in the long run. 

In a short period of time, the cost of equipping a typical bridge with sensors can offset the cost of periodically sending an experienced inspection crew to that bridge. 

The LV-45 and LV-48 series linear position sensors from Bestech Australia are used to monitor important structural elements of bridges and transmit data to a remote data logger in real time. These sensors are rated IEC IP67, and have built-in electronics that operate over a wide temperature range.

In the photos above, two LV-48 position sensors are attached to the bridge and its supporting pier with rod-eye swivel ends to allow them to measure movement of the bridge over all three axes relative to the pier over time as well as the ambient temperature.

The LV-45 and LV-48 sensors from Bestech Australia are available with aluminium and stainless steel housings, a variety of mounting hardware, and cable or connector electrical terminations. These sensors give an analogue output of either a high-level DC voltage or a 4-20 mA current loop, either of which can easily connect to any data acquisition system for continuous monitoring and/or data transmission over a remotely accessible wireless network.