Wireless Bridge Surveying via GPRS
Many logging applications are in remote sites with no available Internet or long range transmission options available. GPRS offers world-wide accessibility to data. A civil engineering company wanted to measure the inclination of 4 points on a bridge and log the data and retrieve it remotely.
The Problem:
The four points of inclination measurement was spread over a 100m bridge. The bridge was isolated from Internet connection or a viable power supply, meaning any solution had to be completely self contained and powered.
The Solution:
Four T24-IA current acquisition modules were integrated with inclinometer sensors with 4-20mA outputs. These were calibrated to ± 3 degrees inclination resulting in a value for each sensor in the range ± 3 degrees. The data from the four acquisition modules was collected by a T24-SO serial output which passed the data to a GPRS router. The router stores the values from the sensors and in-turn, regularly emails them to the surveying company. In addition, when limits of over 1.5 degrees movement on any sensor occurs, an SMS message is triggered to alert excessive movement on the bridge instantaneously.
Alternatively, using the same configuration of equipment, a virtual com port could be added to a PC via a VPN provider to allow data to seamlessly appear at any PC in under one second from when it left the T24-SO serial output at the remote site.
Products used in this application:
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