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