Pavement Deflection Data Exchange: Technical Data Guide, Version 1.0
AASHTO, 1998 - Pavements - 56 pages
Nondestructive deflection testing (NDT) devices have become integral tools in the evaluation and analysis of pavement facilities. Historically, the data produced by deflection devices have been stored in output files with the type, extent, and organization of collected data being left to the discretion of the individual equipment manufacturers. This document describes a device-independent universal pavement deflection data exchange (PDDX) specification that utilizes the data management concept of section blocks, similar to the software initialization file format used by many computer operating systems. The use of section blocks has proven to be an efficient and flexible method in the management of data and can be applied successfully to pavement deflection testing technology.
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Data Format Configuration
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24-hour clock ASCII ASCII character Benkelman Calibration Date Syntax Calibration Factor Syntax center TestTemperatures converted to PDDX data elements Data Exchange File date Description Decimal Symbol deflection basin data Deflection Data Exchange deflection data file deflection file deflection sensors DeflectionSensorYAxisDistances delimiter symbol Device Calibration Device Information DeviceDesignationName DeviceLoadType DropData2 DropDatal Dynatest FWD Edition entry FacilityName Fahrenheit falling weight deflectometers file converted fixed format output Geophones Hertz Interstate 95 KUAB Laser literal string load and deflection load cell Load Deflection Devices load frequency loading devices LoadUnits Location Identification metric Metric System number Description NumberOfDrops NumberOfTemperatureSensors NumberOfTestLocations Operations Information output format Pavement Deflection Data pavement surface PDDX file format PDDX format Phonix FWD pound-force relative calibration Road Rater Sample File seismometers serial number shown in figure SiteName specifications StartDate steady-state vibratory stored string Description temperature TemperatureUnits Test lanes Test Location TestComment TestLane TestLocation TestLocationUnits TestType unit Description Units Syntax