1 Permanent GNSS station network and AlpCheck: freight transport monitoring 19 th June 2008 Giorgio Gaber Auditorium Palazzo della Regione Lombardia MILAN Francesco Matonti IREALP
2 Project summary Problems related to data sharing on mobility are evident, mainly due to differences in the data collection systems that lead to a difficult homogenization. AlpCheck aim is to create an information system able to manage data coming from the existing monitoring systems in the Alpine area. It should be global but it will have to adapt itself to the characteristics of each user. The system has to adapt itself to multiple requirements and various contexts and different typologies of travel. The IREALP Pilot Project in collaboration with SLALA IREALP (Regione Lombardia, satellite systems) cooperates with SLALA (Regione Piemonte, logistics) to carry out an experimentation about an high precision route tracing via on-board GPS devices for heavy trucks.
3 The System Permanent GNSS Station Low cost GPS receiver Web Service GPS GSM/GPRS GSM FTP Pilot Project DB GPRS module GSM FTP Server Data analysis Tracking software Fleet Monitoring Fleet Monitoring Strengths Sensitive improvement of position Guarantee of position calculated
4 The Technology Use of GNSS (Global Navigation Satellite System) for positioning (GPS, GLONASS, GALILEO e COMPASS). Absolute Positioning: accuracy m no guarantee of information being submitted to the control centre Relative Positioning: increase in accuracy guarantee of position obtained
5 The Methodology The relative positioning Differential GPS can eliminate all errors that are common to both the reference receiver and the roving receiver. Reference Station
6 Reference GNSS Stations Looking for a good place for installation Area of interest: North-Western of Italy Italy
7 Characteristics for the site selections: Clear horizon Clear of reflecting surfaces Controlled vegetation Possibility to put the receiver not too far from antenna Data accessibility via internet Continuous electric power Ease of access Ease of installation Multipath is the corruption of the direct GPS signal by one or more signals reflected from the local surroundings.
8 The GNSS Antenna and receiver The Antenna A choke ring antenna is a particular form of omnidirectional antenna for use at high frequencies. It consists of a number of conductive concentric cylinders around a central antenna. Due to its delicate construction, it is often enclosed in a protective cover or radome. Choke ring antennas are notable for their ability to reject multipath signals from a source. Forced Centering Device lightning protection The Receiver
9 The AlpCheck GNSS network Santo Stefano Roero (CN) Lenta (VC) Domodossola (VB) Mondovì (CN) Mede (PV) Levelling Nizza Monferrato (AT) Serravalle Scrivia (AL)
10 The GPSLombardia and AlpCheck GNSS network IREALP Know-How to support management and control of the GNSS Network
11 The IREALP control center We estimate the stations coordinate periodically The earth's surface is constantly moving and we want to know the precise location of the reference station! We estimate the precise position of permanent GNSS stations with BERNESE v5.0 sw, an international standard for scientific application.
12 The Check of quality data
13 Bad quality data Good quality data
14 GECO system RAW Data Monitor and Control Fleet Monitoring Ionospheric Model Processing Position Precise orbit Permanent GNSS Network RINEX Data
15 Perspectives and opportunities The control activity of the load status obtained by pressing specific keys on the device, during the loading and unloading procedures, is definitely affected by a serious degree of uncertainty. Installing a set of sensors which might make this information automatic so to ensure a real and precise load status control. By way of infrared sensors it is possible to assess the movement of the boxes or parcels inside a container; the opening or closing of the doors of the vehicle might be controlled with the application of electromagnetic sensors, or light-variation sensitive sensors; the use of ultrasound sensors also allows to check the availability of space inside the containers, to better use the available space. All information are collected and sent, using a wireless module based on the ZigBee technology, to the device on board of the vehicle transmitted, through a GPRS package, together with the GPS observation data to the server.
16 Thank you for Your Attention For further information please visit: alpcheck.eueu irealp.itit gpslombardia.itit Or send an to: francesco.matonti irealp.itit gpslombardia.itit
17 Domodossola (DOMO)
18 LENTA (LENT)
19 Mondovì (MONI)
20 Nizza Monferrato (NMON)
21 Santo Stefano Roero (ROER)
22 Mede (MELO)
23 Serravalle Scrivia (SESC)