INERTIAL PROFILING SYSTEM
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”).
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
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.
Measurement: Optical encoder based distance
measurement system with longitudinal distance measurement
error of 0.1% or less.
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.
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.
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.
Speed: 5 -70 mph (8 -112 kph) with Class
I data (true 1” / 25 mm sampling) at all speeds.
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
& Accuracy: Guaranteed to meet or exceed industry
standards and specifications (including AASHTO M328, R056,
and Texas 1001-S).
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
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.
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.
Adjustment: Dove-tail hardware supplied for
horizontal and vertical adjustment of laser / accelerometer
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).
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
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.
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.
Time Display: Real time display of longitudinal
stations (chainage) and vehicle speed (in English or
Metric), profile traces, and GPS position during data
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)
Marking: Entry of location notes by electric eye or
push button, with post-collection text entry by operator.
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).
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.
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).
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.
Filtering: User selectable filtering parameters
as required by specifications (e.g. high and low pass
Track Systems Generates Dual Track Reports:
Patented functionality of single sensor systems to report
dual wheel tracks (separately collected in either
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
Operating ambient temperature range: 32° to 120° F (0
Recommended operating humidity should not exceed 90 percent
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).
Varies by system; example: CS9300 Portable System:
60”L x 8”W x 24”H (152cm L x 20.3cm W x 61cm H).
Contact SSI for particulars on other systems.
Varies by system; example: CS9300 portable system (mount
hardware): ~75 lbs (~34 kg).
7-14 volts DC.
Training: On-site assistance with system installation
and configuration is available worldwide, as is operator
training. Worldwide multi-lingual on-site operator
Time Diagnostics: Profiling system health monitored
by real-time diagnostics to verify integrity of main
profiling system electronics, all sensors, and data
Updates: Self-installing software updates
automatically overwrite prior versions. Updates
distributed by Internet download or issued with automatic
update notification (Internet connection required).
Component Replacement: All collection system
components portable, modular for in-field replacement.
SSI one year warranty on all profiling system components and
accessories. Underlying warranties extends to
components manufactured by third-parties.
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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