1. South American Applications of Strain Gauge Based WIM
Illustration of WIM Weighing Technology & Sites
Today’s Agenda
Brief Company Introduction
Product Overview:
Fixed Weigh-In-Motion
Strain Gauge Sensor
Site Performance Examples

2. INTERCOMP Designs, Tests & Manufactures Products & Solutions
Manufacturing advanced weighing technology by any measure.
Designs, Tests & Manufactures Products & Solutions
Intercomp Worldwide Headquarters
Medina, MN USA
Installed Systems in Over 80 Countries
Worldwide Leader in Scales for Transportation Industry
ISO 9001:2008 Certifed
Worldwide Offices
US, UK & Chile
State-of-the-art manufacturing facility
90,000sq/ft Building with a Fully Staffed Engineering Team

3. Industries We Serve Portable & Fixed Weighing Solutions for Transport
Wheel/Axle Scales
Traffic &
Enforcement Scales
Motorsports/F1 Scales
Agriculture Scales
Crane & Material
Handling Scales
Aviation Scales
Military Scales
Mining Scales 3

4. Weighbridges TECHNOlogy
Most accurate means of weighing heavy vehicles
Why Weighbridges Use Strain Gauge Transducers
Strain gauge transducers create an electrical signal whose magnitude is directly proportional to the force being measured.
Rapid response
Negate side loads
Compensate for temperature
Hermetically Sealed
Easily Calibrated
Cost Effective

5. Accurate In-Ground Weigh-In-Motion
Development continuum of strain gauge technology
Static Truck Scales
Weigh-In-Motion
Axle Scales
Weigh-In-Motion
Strip Sensors

6. PRODUCT ON FOCUS: Strip SenSOR SCALE
In-Ground Strip Sensors
Same technology as traditional WIM scales
Load Cell / Strain Gauge Technology.
No drainage required, simple slot, & a few hours to install.
low to high volume roads
Any speeds
Provides redundancy over traditional weighbridges.

7. Product in FOCUS: Strip SENSOR SCALE
Why?
Easy to Install
No maintenance
Annual Calibration due to stable readings
No temperature compensation
No sweet spot – not wheel position sensitive
Long in service life time
Signal is drawn directly from Strip – no need for additional equipment
Designed to ignore side loads
Typical data: -
Axle Weights
Left/Right Wheel Weights
Axle Spacing
Gross Vehicle Weight
Vehicle Speed
(Customizable units kg/lb, MPH/KmH, classification, etc)

8. Strip Sensor Installation
Minimally Invasive
Quick Installation
Approximately 8 hours.
Minimal Cutting
No excavating or
pouring of concrete
No Drains Required
½ lane widths – any size

9. WIM Strip Sensor Configurations
Typical WIM Site
2-8 sensors
2-4 Rows
Spacing modified for Speed
Increase sensors, increases accuracy
(more data points)
Factors: Road surface, Installation quality, Vehicle Suspension

10. Applications v Configurations
Data Collection
Pre-Selection
Direct Enforcement
Tolls & Gates

11. Example of Two Lane Site Configuration
In-Road:
WIM Strip Sensors
Loop
Additional equipment:
WIMLogix or other CPU
Camera(s) triggered from loop
Camera output to CPU OR Software
Other equipment can interface with I/O of CPUs

12. Data Collection: Example Data from Sites
Seven 2-Sensor sites
with Camera
30 to 38 runs per data set
Class 6 vehicle
Static Weight
14200 – kg
34-58 kmh
Samples over 4 days
15oC to 25oC

13. Site 1: Mar Del Plata 4 Sensor 2 Row Layout Single Vehicle Testing
38 Runs in Data Set
Free flowing 45kmh
1 Day Testing
approx. 15oC
Desired accuracy 10%
Results
16,690 KG
3.65% GVW Error (95% CI)
5.23% Axle error (95% CI)
16,066 kg Min
17,264 kg Max
4 Sensor
2 Row Layout

14. Site 2: Mar Del Plata II 4 Sensor 2 Row Layout Single Vehicle Testing
30 Runs in Data Set
Free flowing – 50kmh
1 Day Testing
approx. 15oC
Desired accuracy 10%
Results
16,690 KG
5.16% GVW Error (95% CI)
5.81% Axle error (95% CI)
15,881 kg Min
17,432 kg Max
4 Sensor
2 Row Layout

15. Site 3: NEO 4 Sensor 2 Row Layout Single Vehicle Testing
33 Runs in Data Set
Free flowing -40kmh
1 Day Testing
approx. 20oC
Desired accuracy 10%
Results
16,690 KG
4.16% GVW Error (95% CI)
5.68% Axle error (95% CI)
16,069 kg Min
17,281 kg Max
4 Sensor
2 Row Layout

16. Site 4: NEO II 4 Sensor 2 Row Layout Single Vehicle Testing
31 Runs in Data Set
Free flowing – 50kmh
1 Day Testing
approx. 20oC
Desired accuracy 10%
Results
16,690 KG
4.32% GVW Error (95% CI)
6.61% Axle error (95% CI)
16,018 kg Min
17,691 kg Max
4 Sensor
2 Row Layout

17. Site 5: SAN san pedro 2 Sensor 1 Row Layout Single Vehicle Testing
31 Runs in Data Set
Free flowing – 40kmh
1 Day Testing
approx. 25oC
Desired accuracy 10%
Results
14,200 KG
7.63% GVW Error (95% CI)
10.30% Axle error (95% CI)
12, 965 kg Min
15,116 kg Max
2 Sensor
1 Row Layout

18. Site 6: San PEDRO II 2 Sensor 1 Row Layout Single Vehicle Testing
32 Runs in Data Set
Free flowing -40kmh
1 Day Testing
approx. 25oC
Desired accuracy 10%
Results
14,200 KG
5.13% GVW Error (95% CI)
8.68% Axle error (95% CI)
13,361 kg Min
14,859 kg Max
2 Sensor
1 Row Layout

19. Site 7: Camp 1 4 Sensor 2 Row Layout Single Vehicle Testing
30 Runs in Data Set
Free flowing – 45kmh
1 Day Testing
approx. 20oC
Desired accuracy 10%
Results
16,700 KG
4.22% GVW Error (95% CI)
6.59% Axle error (95% CI)
16,066 kg Min
17,264 kg Max
4 Sensor
2 Row Layout

20. Seven Site Performance Summary
Static Weight
Samples
GVW
(95% CI)
Axle
GVW Min
GVW Max
MDP 1
16690 kg 38
3.65%
5.23%
-5.91%
7.64%
MDP 2 30
5.16%
5.81%
-6.95%
5.53%
Neo 1 33
4.16%
5.68%
-6.66%
9.77%
Neo 2 31
4.32%
6.61%
-8.73%
9.40%
SanP 1
14200 kg
7.63%
10.30%
-15.08%
11.37%
SanP 2 32
5.13%
8.68%
-15.57%
10.54%
Camp 1
16700 kg
4.22%
6.59%
-8.46%
9.17%
COST 323 Accuracy Criteria (excerpt)
Criteria
Domain
A (5)
B+ (7)
B (10)
Gross
GVW > 3.5t 5 7 10
Single Axle
Axle Load > 1t 8 11 15
All sites B(10)
6 of 7 B+ (7)
4 of 7 A (5)

21. Conclusion All sites exceeded the customers expectations in terms of:
Performance
Reliabilty
Ease of Use
Accessability of Data

22. Clint BOWER
Tel: /
Toll Free (US):
Worldwide: