Salient Systems, Inc., a leading provider of wheel impact load detectors (WILD) since 1984, has installed over 250 systems globally that aid the rail industry in accurate data for interchange billing and research purposes. The MK III WILD monitors wheel impact forces, enhances safety, and provides options for additional features like hunting truck detection and weigh in motion, leading to improved efficiency and reduced damage. The Wheel Data Management System (WDMS) archives data, generates alerts, and supports various detectors, utilizing robust software and hardware to ensure high availability and reliability.

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Salient Systems, Inc. – An LB Foster Company, 4393-K Tuller Rd. • Dublin OH. • 43017 • USA
Ph: +1 (614) 792-5800 • Fx: +1 (614) 792-5888• www.salientsystems.com
WHEEL IMPACT LOAD DETECTOR
Product Information
Introduction
Salient Systems, Inc. has been in business
since 1984 and is the world’s predominant
supplier of Wheel Impact Load Detectors
(WILD). More than 250 systems have
been installed worldwide.
WILD and Hunting Truck Detector data
provided to the Association of American
Railroads (AAR) InteRRIS Database is
exclusively generated by Salient detectors
for rail industry interchange billing and
R&D purposes. Additionally, the current
wheel replacement and / or repair
interchange rules as established by the
AAR are based exclusively on the
accurate measurement information
(approximately 2% static calibration and
1% dynamic calibration) provided by
Salient detectors.
Due to system modularity, WILD detectors
provide a platform for the addition of
Hunting Truck Detection (HTD) and Weigh
In Motion (WIM), which also provides
overload imbalance detection. These
additional modules are extremely cost
effective when building on the hardware
and infrastructure that a Salient WILD
provides.

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Salient Systems, Inc. – An LB Foster Company, 4393-K Tuller Rd. • Dublin OH. • 43017 • USA
Ph: +1 (614) 792-5800 • Fx: +1 (614) 792-5888• www.salientsystems.com
MK III Wheel Impact Load Detector Attributes
FEATURES
Monitors Wheel Impact Forces
Collects Train, Vehicle, and
Wheel Info
Monitors Bi-directional Traffic
Auto Counts Vehicles
Car Type ID. With Valid Car
Library
Automatic Alarm Notification
Incorporates AEI Tag ID.
Self Diagnostic
BENEFITS
Reduces:
Derailments
Rail Fatigue
Bearing Damage
Rail Fractures
Car and Truck Damage
Concrete Tie Cracking
Wood Tie Plate Cutting
Increases:
Fuel Efficiency
Wheel Tread Life
Safety
Track Life
Salient’s Wheel Impact Load
Detector (WILD) is compliant
with the AAR Rule 41 Standard.

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Salient Systems, Inc. – An LB Foster Company, 4393-K Tuller Rd. • Dublin OH. • 43017 • USA
Ph: +1 (614) 792-5800 • Fx: +1 (614) 792-5888• www.salientsystems.com
Wheel Impact Load Detector System Hardware
One standard single-track system configuration (US Patent No. 4,701,866) is detailed
below. The system includes one Wheel Impact Load Detector (utilizing Salient SiteMaster
software) with thirty-two vertical wheel load circuits and AEI tag reading system. HTD and
WIM are optional add-ons to the WILD. The Wheel Data Management System (WDMS) is
an optional server platform provided by Salient in virtual format.
WHEEL IMPACT LOAD DETECTOR (WILD)
Composed of the following:
01 Ea Industrial CPU with Flash Drive & Serial Card
01 Ea ISO-BUS Interface Board
01 Ea MODEM 56K (As needed)
01 Ea VME Backplane
01 Ea ISO-BUS Backplane
02 Ea Power Supply Modules
01 Ea Rack Mount Assembly
16 Ea 2-Channel Front End Processors
01 Ea Front End Backplane – 16 Slot
01 Ea Set Protective Covers / Guards
01 Ea Set Mounting Hardware
01 Ea Set Data Cable & Protective Hose Assembly
01 Ea Set PCB based Vertical Strain Gage Assembly
01 Ea Linux O/S License
01 Ea Mk III SiteMaster Software License
AUTOMATIC EQUIPMENT IDENTIFICATION (AEI)
Composed of the following:
01 Ea AEI Reading System & Serial Interface
01 Ea Surge Suppression Unit & Interconnect Cables
01 Ea SiteMaster AEI Interface Software
WHEEL DATA MANAGEMENT SYSTEM (WDMS)
Composed of the following:
01 Ea WDMS Database Software License
01 Ea Server Platform (Provided at additional cost)

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Salient Systems, Inc. – An LB Foster Company, 4393-K Tuller Rd. • Dublin OH. • 43017 • USA
Ph: +1 (614) 792-5800 • Fx: +1 (614) 792-5888• www.salientsystems.com
MKIII System Options & Hardware
HUNTING TRUCK DETECTOR (HTD)
This optional addition to the WILD is used
to detect oscillation on tangent track
which can induce excessive lateral
forces that significantly contribute to
wear of the wheel and track. This
detection feature adds an additional 16
Front End Processors, 1 Power Supply
and 128 Lateral Strain Gages to the
WILD.
Truck hunting indicator
Lading damage prevention
Auto alarm feature
Vehicle stability monitoring
Improve safety
WEIGH IN MOTION (WIM)
This optional software addition provides
an alternative to weigh bridges with the
ability to track vital vehicle weight
information for hazardous situations
such as Overload or Load Imbalance
conditions. This feature adds an Iso-
Amp WIM Firmware Module, WIM
Software Module.
Imbalance alarming
Overload alarming
Obtain total train length
Monitor individual vehicles
Reduce track damage

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Salient Systems, Inc. – An LB Foster Company, 4393-K Tuller Rd. • Dublin OH. • 43017 • USA
Ph: +1 (614) 792-5800 • Fx: +1 (614) 792-5888• www.salientsystems.com
WDMS System Overview and Functionality
The Wheel Data Management System
(WDMS) accepts data provided by the
Wheel Impact Load Detectors (WILD),
archives data for later retrieval and
viewing, and generates alarms for
vehicles with wheel impacts. WDMS
alarms may be transferred via e-mail,
FTP over the Internet or private intranet.
Impact alarms are generated based on a
set of customer-defined thresholds with
the assistance of Salient Engineering.
WDMS currently supports multiple Wheel
Impact Load Detectors, Overload and
Imbalance load detectors and Hunting
Truck Detectors manufactured by Salient
Systems, Inc.
The system is built around the high-
availability hardware solutions that
include fault tolerant disk drives and
industrial power supplies. The software
solutions chosen for WDMS were driven
by their reputation for robustness and
high-availability. The operating system is
Linux and the database is a fully
relational, ACID compliant version of
MySQL. The system is written almost
entirely in Java and uses many Java
technologies.
Comprehensive set of analytic tools
Performs continuous monitoring function
Track detector outages
Automated alert capability
Maintain statistical performance data
System health monitoring
Tools for automatic forwarding of data