Patented Precision 8 August 2014 US Patent 6,775,914 Can Patent 2,405,133 Other Patents Pending surpro.com

The New SurPRO 4000 SurPRO comes from words “Surface” & “Profiler” Used on roads, structures, runways and floors 22 years of R&D and continuous improvement US & Can patents-inertial stabilizer & geometry SurPRO 3000 developed under FHWA contract: “Improving the Quality of Pavement Profile Measurement-Priority Number One: Reference Device” SurPRO 4000 and 4000L (laser) available now Includes all features of SurPRO 3500 Upgrades from 3500 to 4000 model available

FHWA Reference Profiler Introducing SurPRO 4000 Added Laser Adjustable short wavelength to 75mm (3in) or less Short wavelength is phase and amplitude accurate Sunlight shields for laser Optical Target Sensor for precise DMI (+/-1cm error) Automatic start and stop of profiler Automatic start and stop of distance (DMI) cal. Enables very high accuracy short waveband Millimeter sampling High Quality processing

SurPRO 4000L Laser sunlight shields (2) Laser, under center of SurPRO in machined box Optical Target Sensor

SurPRO 4000L Short Wavelength Extension SurPRO 4000 extends to 4.0 cycle/m (250 mm) sufficient for IRI, medium and long wavebands SurPRO 4000L extends to 13.3 cycle/m (75 mm) to add short waveband cross-correlation of 94% Additional Spectral Content SurPRO 4000L (red) SurPRO 4000 (black) 13.3 cycle/m 4.0 cycle/m

SurPRO 4000L 94% Short Waveband Cross-Correlation SurPRO 4000L TT run zoomed in to show 1.6m BW high pass filtered slope detail matching

Optical Targets Optical Target Sensor detects leading edge of each target and records precise distance (location)

FHWA Reference Profiler Data Collection 14-15 May 2013 Record High Temperatures Checked out unit Calibrated distance on 1000’ DMI site Collected 7 runs on 6 test sections in 2 days Repeated DG because of curling on 14 May

Pavement Thermal Shock DG Concrete Slab Curling 14 May 1:10PM 39.3C (102.7F) 15 May 5:44 to 7:07AM 22.6-24.0C (72.7-75.2F) 14 May 11:55AM 33.4C (92.1F) 1.0mm (0.04in) 1.9mm (0.075in) 4.69m (15.4ft) DG, 14 Runs, 14 & 15 May, BW bandpass filtered 1.6 to 8 m (Medium Waveband)

Effect of Temp on DG Cross Correlation DG slab curling during scorcher Data collected 11:45AM-1:10PM at 7 min per run Sequential CC correlates each run with preceding run. First Run CC correlates each run with first run.

Effect of Temp on DG Cross Correlation DG slab generally stable temp at sunrise Data collected 5:45AM-7:07AM at 7 min per run Sequential CC correlates each run with preceding run. First Run CC correlates each run with first run.

SurPRO #90 vs SurPRO #91 TT, 5 runs from each cross-correlated in PCM TT, 1 run from #91 cross-correlated with 5 runs from #90 in PSM, avg. CC of 99.5

RESULTS PROCESSING NOTES Asphalt Concrete (AC) RESULTS PROCESSING NOTES 7 profiles were run on each section; the first was a closed loop. Only the last 6 runs were used to calculate CC Results generally are for #90 profiler Laser alignment on #91 reduced some short waveband CC results Yellow cells indicate Sequential CC method was used due to changing temperatures affecting pavements

Asphalt Concrete (AC) 6 Runs Unfiltered 6 Runs BW Highpass filtered @ 30m 99.9% Repeatability 2 Runs Cross Correlated in ProVAL using IRI filter

Chip Seal

Chip Seal 6 Runs Unfiltered 6 Runs BW Highpass filtered @ 30m 99.6% Repeatability 2 Runs Cross Correlated in ProVAL using IRI filter

Diamond Grinding

Diamond Grinding 6 Runs Unfiltered 5 Runs BW Highpass filtered @ 30m Very small diamond grinder bumps 0.5 mm peak to peak 99.5% Repeatability 2 Runs Cross Correlated in ProVAL using IRI filter

Diamond Grinding Very small diamond grinder bumps

Longitudinal Tining

Longitudinal Tining 6 Runs Unfiltered 5 Runs BW Highpass filtered @ 30m 99.9% Repeatability 2 Runs Cross Correlated in ProVAL using IRI filter

Open Grade

Open Grade 6 Runs Unfiltered 6 Runs BW Highpass filtered @ 30m 99.9% Repeatability 2 Runs Cross Correlated in ProVAL using IRI filter

Transverse Tining

Transverse Tining 6 Runs Unfiltered 6 Runs BW Highpass filtered @ 30m 99.9% Repeatability 2 Runs Cross Correlated in ProVAL using IRI filter

SurPRO Elevation Accuracy DEVICE SENSORS SIGNAL CONVERSION CALCULATIONS X Axis Accelerometer (Roll) θX Mechanical (SurPRO wheels, frame and suspension) Y Axis Accelerometers (Pitch) Electronics & Signal Processing (Analog to Digital-ADC) Math E θY E Real Elevation→θY θX,Y→VθX,YA VθX,YA→VθX,YD VθX,YD→Elevation Error = +/-0.1% (est.) Error = +/-0.2% based on accelerometer calibration sheets. Reduced by dual Y measurement. Error = +/-0.4% based on ADC specified accuracy Error = 0% TOTAL ERROR = +/-0.7%

Repeatability IRI, Medium & Long Wavebands Pass level = 0.98 SurPRO 4000

Repeatability Short Waveband Pass level = 0.94 Short

FHWA Reference Profiler 2013 Benchmark Testing Recap Mean repeatability cross correlation for all six sections (IRI, medium & long filter) was 99.4% Individual cross correlations up to 99.9%. Short waveband cross correlation using 4000L laser of up to 99.4%. SurPRO was insensitive to operator bias such as acceleration and transverse tilting motion Up to 99.5% repeatability using different profilers operated by different operators

SurPRO Models Table 1.

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