SR99 Bored Tunnel-Assessment of Settlement Impacts ... - SCATnow

6.0 Distributed Data Acquisition6.1 Goals6.2 ImplementationA data acquisition station provides a solution to collect data around the clock fromsensors that are distributed over a large downtown area and locked up in buildings.• Readings are taken remotely.• Consistency and repeatability in interfacing a variable amount and variety ofsensors.• Robust and continuous system.• Ease of observing results and generating alarms.• Economical acquisition and evaluation of the data.This simple solution includes getting all sensors to output a linear voltage that caneasily be interfaced into an analog-to-digital converter (A/D) that prepares a digitalinput to a computer. The A/D can even be directly connected to the internetwithout any local computer and hence can be much more economical. Using adistributed data acquisition system, data is acquired by one computer at one centrallocation, analyzed and displayed conveniently on internet web pages, and monitoredfor threshold values that are not to be exceeded with appropriate alarms sent out byemails, web pages, etc. See Figure E-1 for a schematic of this system.The Alaskan Way Viaduct & Seawall Replacement Program March 2010Proposed SR 99 Bored Tunnel - Assessment of Settlement Impacts to Buildings E-11Public Disclosure Request 11-0123 for Elizabeth Campbell - 2nd installment