Traffic DaTa collecTion STaTion

SPECIALIST SKILLS TO MEET YOUR REQUIREMENTS ...
Combining technical skills, close customer relationships and maintenance, LACROIX Trafic offers multiple solutions to help
contractors and users of our whole range of products. Assistance in project planning, training (certified trainers available),
technical support and maintenance are a few examples of services offered to respond to each and every market requirement.
Solutions for a free flowing world
Specializing in traffic regulation and management equipment, LACROIX Trafic offers a complete
range of trafic data collection stations for road, highway and urban applications.
Developed in compliance with the TEDI (NF99302) – LCR (NFP99340) standards, the LACROIX Trafic
range of traffic data collection solutions provides the guarantees of a system complying with French
Ministry of Transport recommendations and compatible with various international standards.
Recognized for over more than 30 years in the field of traffic management, the LACROIX Trafic range
delivers real time statistics which improve the knowledge and traffic flow control.
LACROIX Trafic offers a wide range of modular and evolutional equipment providing a specific
answer for every application.
CONTACT DETAILS
Z.I - 1ère avenue - 11ème rue
BP 525 - 06516 CARROS cedex FRANCE
Phone number: +33(0)4.92.08.43.00
Fax number: +33(0)4.92.08.43.20
E-mail : [email protected]
Web : www.lacroix-trafic.fr
RADT - 2014 january - this document is LACROIX Trafic property and may not be reproduced without prior consent of the latter.
Traffic Data
Collection Station
Traffic Data
Collection Station
Synoptic diagram of the operation
This diagram represents the entire range of various types of detectors ranging
from the electromagnetic loop to the piezoelectric strip.
These detectors equip all LACROIX Trafic products and interface with the sensors
over a distance of up to 500 meters.
General
Range of detectors
Loop
Electromagnetic
All detectors are double eurocard format.
Piezo
LT8B Presence detector
N.B. The number of lanes which can be equipped is not limited to the number shown in the diagram.
> Compliant with TEDI(NF99302) – LCR(NFP99340) and international standards
This detector implements high technical integrated
solutions such as: free oscillators, automatic frequency
adjustment... which make it possible to correct
inductance variations and to calibrate in real time.
Schematic representation of lanes
> Electronic design and robust mechanics for use in diverse harsh environments
> Maximum integration of modular features which permit simple extension of the range
Features
> 8 channels
LACROIX Trafic measurement outstations make it possible to produce various types of measurements according to the needs of the operator.
> Measurements possible: flow, speed, length in
conjuction with electomagnetic presence loops
(which can vary from 80µH to 1200µH)
Table showing the accuracy of instantanious measurements calculated at the passage of each vehicle:
Type of measurement
Sensor
Required Accuracy
Achieved Accuracy
Time present
1 loop
10 %
<8%
Time between vehicles
1 loop
10 %
<8%
Speed
2 loops
5%
<3%
Length
2 loops
10 %
<8%
Distance beween vehicles
2 loops
10 %
<8%
Vehicle category
Axle sensor
10 % in heavy raffic
< 7 % in heavy trafic
Weight per axle
Piezoelectic sensor
15 %*
de 10 à 15 %
Total weight
Piezoelectic sensor
15 %*
de 10 à 15 %
Table showing the accuracy of average measurements calculated continuously on 4 readings for each vehicle:
Type of measurement
Sensor
Required Accuracy
Achieved Accuracy
Flow
1 loop
10 %
<1%
Occupancy rate
1 loop
Linked to presence time
Linked to presence time
Average speed
2 loops
5%
<3%
The 32 chanel stations accomodate the CPU, the modem, detectors, the
power supply and the battery in a polyester cabinet. The station is built based
on a 19’’ integrated rack.
A double cabinet housing is optional to cover the the stations.
The remote detector
When the configuration requires measurements from a distance of up to 500
meters, in order to maintain the required accuracy, LACROIX offers a solution
of remote detection. The box can be placed for up to:
> 4 lanes in speed/length mode
> 4 lanes in speed/caregory or weigh in motion mode
> Automatic output blocking in case
of disconnection (to protect against
parasitical counts)
> Frequency adjustment to avoid
parasitical effects between loops
> Quick start
Remote detector
Station
The 2 channel LTC2V uses the signal from the piezoelectric
sensor. Its specific implentatiion features and its fiberglass
composition guarantee 10 times higher resistance than
conventional «resin + silica» methods.
Using powerful algorythms, the sensor automatically self
calibrates on movement of LGV or HGV.
> Vehicle classification in 14 European standard classes
> Measurement of axle weight
and total weight of vehicle
> Front face serial link to set
the sensor parameters according
to the site
> Certified by the French
Ministry of Transport
DATA COLLECTION SOFTWARE
These different entities are linked to the features they manage:
Functional analysis
> Man Machine Interface (MMI)
> Equipment Communication Module
Metering loops
Weight category
PIEZO
REMOTE DETECTOR
LT8B
LTC2V
STATION
32 channel STATION :
> 32 lanes
Piezo LTC2V category
and weigh-in-motion sensor
SPHINX V uses the Windows XP or Windows 7 platform. It consists of several software programs communicating with
SQL database thus simplifying its architecture and configuration.
500 m
SENSORS
The stations
The detector is an essential element for good metrology in the chain of data collection. Through a policy of continuous
research and development, LACROIX Trafic provides a complete range of traffic data measurements.
MODEM
> 16 lanes in speed/length mode
> 8 lanes in speed/category
or weigh in motion mode
TRANSMISSION MEDIUM
LT8B, LTC2V
SENSORS
Metering loops
Weight category
PIEZO
> Automatic controllers dedicated to each type of equipment to be managed
Each Application (VMS, DATA COLLECTION STATIONS, SIREDO, carpark
management signs, AUTOMATIC BARRIER, CONGESTION MONITORING,
PRISM....) has its own automatic controller dedicated to its own functional
specifications. This provides great modularity which means that, for each
application, SPHINX requires only the corresponding automatic controller.
In particular, the automatic data collection outstation management system
is presented in the form of a simplified diagram of the network being
monitored. An icon is represented by an on-screen simplified diagram of
traffic measurements, such as traffic flow and is directly available on the
icon, all traffic data may be visualised just by clicking onto the icon.
www.lacroix-trafic.fr