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Len Palek for Bob Strommen
MnROAD Research Conference
October 4, 2011
Latest Technologies in Pavement
Testing and Instrumentation
Presentation Outline
Dynamic Testing
Static Data Collection
Sensors
Other
MnROAD Dynamic Collection
The Heart of the System
National Instruments Model 1052
Combination PXI/SCXI Chassis System
Measurement & Automation Explorer (MAX)
MnROAD Data Collection Version 4
MnROAD Trigger Systems
Software Wireless GPS Live Traffic
Optical Beam Manual Switch
The Output
-400
-350
-300
-250
-200
-150
-100
-50
0
50
100
Long
itudi
nal M
icro
stra
in
Cell 33
Cell 34
Cell 35April 3, 2009
PPA SBSPPA + SBS
What a Longitudinal Trace Should
Look Like..
Trace for a PCC Embedded Strain
Gauge
Dynamic CE Data After Noise
Reduction
Static Data Collection
CR1000
AVW200 TDR100
SDMX50SP AM16/32 AM16/32
Static Data Collection Systems
Campbell Scientific Loggernet
Campbell Scientific CRBasic
The Output
Daily Temperature Data
Instrumentation
Soil Pressure
HMA and PCC Strains
Deflection
Weigh in Motion
Temperature
Moisture
Frost
Lysimeter
A Little Explanation
All resistive strain gauges work on the principles of the Wheatstone bridge. A
Wheatstone bridge is a network of four resistive arms. The circuit is very
sensitive to changes within each arm. One or more of these arms can be an
active sensing element.
Dynamic Sensors
Asphalt Strain Concrete Strain
CTL
ASG-152
Dynatest
Tokoyo Sokki
PML-60
Dynamic Sensors Cont’d
Soil Pressure
Pavement
Displacement Soil Compression
Geokon 3500 Macro sensor GHSAR 750-250 CTL SCG
Static Sensors Temperature Concrete Strain
Moisture
Decagon 5TE
Campbell Scientific
CS616/CS635
Irrometer
Watermark 200
Sensirion
SHT-75
Omega THX-20 Geokon 4200
Pavement Monitoring Tools
ALPS 2
ALPS
LISA
Sound Impedance Tube