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Inertial Profiling System
•Measurement
Principle:
Class I inertial profiling system (with laser
and accelerometer-established inertial
reference) and high resolution optical encoder
sensor in compliance with ASTM E950
(“Standard
Test Method for Measuring the Longitudinal
Profile of Traveled Surfaces with an
Accelerometer Established Inertial Profiling
Reference”).
•Device
Rating:
Meets or exceeds Class I requirements of ASTM
Standard E950.
Complies with applicable DOT (e.g. Texas
DOT Test Method TEX 1001-S), Transport Ministry
and other industry standards, including AASHTO
M328, R054, R056 and R057.
•Data
Sampling Interval:
Variable sampling interval with default set to
25 mm (1.0 inch).
One inch (25 mm) sampling interval valid
for all collection speeds.
•Distance
Measurement:
Optical encoder based distance measurement
system with longitudinal distance measurement
error of 0.1% or less.
•Laser
Sensor: Vertical displacement measured using non-contact Class 3B laser
range-finder sampling at a minimum frequency of
16 kilohertz. (Faster sampling sensors, such as
32-64 kHz available for special applications).
Laser sensors unaffected by pavement texture,
color, reflectivity or ambient lighting.
Laser
resolution (typical): 0.00032; vertical
measurement accuracy (typical): 0.0005 inches.
Optional wide footprint sensors available
(e.g. LMI/Selcom “Roline” laser with 3 kHz
sampling).
Class 3B laser safety criteria applicable
to all profiling system lasers.
 
•Accelerometer
Sensor:
Aerospace
grade accelerometer sensor rated for up to +/- 5
g; resolution.
Accurate to +/-0.0001g. Hardware and
software supplied for in-field procedure for
static re-calibration and zeroing of
accelerometer.
•Profiling
System Core Electronics Module: Dedicated profiling system data collection module manufactured in
ISO 9001 facility.
Single module connects all profiling
system sensors with real time diagnostics
monitoring system health.
Core electronics module is portable,
modular, and ships express worldwide for prompt
in-field replacement.
•Operating
Speed:
5 -70 mph (8 -112 kph) with Class I data
(true 1” / 25 mm sampling) at all speeds.
•Profile
Feature and Wavelength Preservation:
Proven ability to measure and preserve
fine surface features more accurately than any
competing system.
Profile wavelength preservation from ~< 1
foot (<.3 m) to in excess of ~760 feet (231.6
meters). With optional survey subsystem, long
wavelengths preservation is thousands of feet
(meters)--theoretically infinite.
•Repeatability &
Accuracy:
Guaranteed to meet or exceed industry standards
and specifications (including AASHTO M328, R056,
and Texas 1001-S).
•Compliance
with Specifications:
Complies with all commonly used agency
specifications and test methods for use of
inertial profiling systems for ride quality
testing applications.
Profiling System Hardware
•Mount
Hardware: Professionally engineered mount hardware for attaching profiling
system to front, rear or mid-point of many
standard vehicles.
Portable systems attach to standard 2
inch (5.08cm) square receiver tube and operate
from host vehicle’s 12V power supply.
•Flexible
DMI Hardware:
Hardware supplied for attachment of high
resolution distance measurement interface to
rear wheel of host vehicle.
Dedicated lug-extenders or flexible wheel
collets supplied.
•Sensor
Adjustment:
Dove-tail hardware supplied for horizontal and
vertical adjustment of laser / accelerometer
sensor modules.
•Adaptor
Hardware:
Custom hardware design and fabrication available
for profiling system attachment onto customer
specified vehicle (front, rear, or mid-vehicle
mount--not all vehicles supported).
•In-Vehicle Workstation: Pedestal mount system and power supply for operator
computer. Alternate suitcase enclosure available
with internal power supply and direct connection
to
profiling system.
Profiling System
Software
•SSI
Profiler Software Suite:
Comprehensive software routines for
calibration, collection, analysis, reporting,
and repeat run comparison/verification.
On-screen instructions for system
calibration and data collection.
All
software fully integrated with Microsoft Windows
7 Professional and prior supported versions.
Software licenses supplied for use on
profiling device and desktop computers.
Free license for agency and academic
users.
•Adjustable
Parameters:
Encrypted raw profile data is infinitely
rewritable with different analysis parameters as
selected by the user.
All data parameters required by agency
specifications are supported.
•Real
Time Display:
Real time display of longitudinal
stations (chainage) and vehicle speed (in
English or Metric), profile traces, and GPS
position during data collection.
•Multiple
Data Collection Triggers: 3 data collection
triggers:
(i) SSI Reverse Direction Trigger
(proprietary procedure that collects exact
stations without pre-marking test sections),
(ii) Electric Eye, and (iii) On-the-Fly.
•Event
Marking:
Entry of location notes by electric eye or push
button, with post-collection text entry by
operator.
•Urban
Area Data Collection: SSI Continuous
Collection feature suspends collection of
profile data at speeds less than 5 mph (8 kph),
records position, and resumes collection when
system resumes above 5 mph (8 kph).
•Pause
Data Collection with Data Retained:
System pauses data collection manually or with
electric eye trigger.
Data from paused sections retained for
reporting separately or combined with non-paused
areas.
•Multiple
Profile Indexes:
Profile data reported in user selectable
indexes: International Roughness Index (IRI,
segmented or continuous), Mean IRI (MRI), Half
Car Ride Index (HRI) and Ride Number (RN).
•Localized
Roughness:
Multiple outputs of localized roughness
supported:
profilograph must grind bump/dip
template, IRI thresholds, and Texas 1001-S.
Dimensions of localized roughness
calculated by length of defect and location of
peak amplitude.
•Variable
Filtering:
User selectable filtering parameters as
required by specifications (e.g. high and low
pass filters).
•Single
Track Systems Generates Dual Track Reports:
Patented functionality of single sensor systems
to report dual wheel tracks (separately
collected in either direction).
•Data
Formats:
Outputs numerous useful or required formats:
PDF, ERD and PPF (compatible with ProVal),
PRO, Excel (CSV or auto-populated in templates
supplied by SSI), raw unfiltered profile, and
ProScan).
Operational &
Physical Attributes
•Temperature:
Operating ambient temperature range:
32° to 120° F (0 -49 °C).
•Humidity:
Recommended operating humidity should not exceed
90 percent (noncondensing).
•Moisture:
Profiling system components impervious to
moisture.
Quality of measured profile degrades with
excessive moisture (active rainfall, standing
water or ponding on surface that can interfere
with laser readings).
•Dimensions:
Varies by system; example:
CS9300 Portable System:
60”L
x 8”W x 24”H (152cm L x 20.3cm W x 61cm
H).
•Weight:
Varies by system; example: CS9300
portable system (mount hardware): ~75 lbs (~34
kg).
•Electrical
Ratings:
•Input:
7-14 volts DC.
•Operating:
~3 amps.
Support
•Operator Training:
On-site assistance with system installation and
configuration is available worldwide, as is
operator training.
Worldwide multi-lingual on-site operator
training available.
•Real Time Diagnostics:
Profiling system health monitored by real-time
diagnostics to verify integrity of main
profiling system electronics, all sensors, and
data communication interface.
•Software Updates:
Self-installing software updates automatically
overwrite prior versions.
Updates distributed by Internet download
or issued with automatic update notification
(Internet connection required).
•In-Field Component Replacement:
All collection system components
portable, modular for in-field replacement.
•Warranty: SSI one year warranty on
all profiling system components and accessories.
Underlying warranties extends to
components manufactured by third-parties.
•Technical Support:
SSI offers technical assistance to customers
worldwide.
Levels of support range from telephonic,
e-mail, remote data upload to on-site
assistance.
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