The steel tube is attached to metal base that can be spot welded to steel specimen. The resistance gage selected for instrumenting and continous monitoring and rating the bridge was Texas Measurements Model AWC8B. An Optim MEGADAC is ideally suited to read highspeed sensors for several reasons. procedure has been written to access this information via the local digital line through National Instruments NI182930E12 interface board that is installed in the PCI bus of the onsite computer. Digital frames be archived in the event of transportation or load violations.

The outer body also helps to prevent mechanical damage to the sensing element, minimizes reinforcement of the gage and converts that change to an output corresponding to the amount of strain. The strain gages used for this project. The accuracy of the WIM system is dependent upon several factors truck class, speed, load, suspension pavement roughness, alignment, and slope environmental factors temperature, wind and calibration regimen. Finally, the Optim MEGADAC requires dedicated computer that would have been more difficult to power and protect during the early stages of the project when only slow speed sensors were being monitored.

The outer body contains series of circular indentations to ensure adequate bond with the concrete matrix. The provided software allows the user to specify different sensor types, common sample interval Hz, and immediate download to the onsite computer via General Purpose Interface Bus GPIB, IEEE RS488.Several common transportation sensor types embedded load scales, piezoelectronic tubes, inductive loops, etc. are wired to an independent data system purchased by the Ohio DOT. This model is designed specifically for use in harsh environments, such as those which exist at bridge site, and for longterm survival.

The steel tube is attached to metal base that can be spot welded to steel specimen. The strain gages used for this project. The camera is wired directly to National Instrument PCI1408 framegrabber board that is installed in the EISA bus of the onsite computer. There have been over sensors installed at HAM1260881 for various experiments and the MEGADAC system has handled them all.

Sample speeds of at least ten times the bandwidth of interest up to Hz are required to completely visualize the bridge response and its properties. This gage was primarily used for highspeed measurements, such as for load tests and monitoring traffic responses.. Another reason was that although the MEGADAC can read virtually any sensor, it is much more expensive to implement than CR10 for large number of channels. This model is designed specifically for use in harsh environments, such as those which exist at bridge site, and for longterm survival.