task 3.1 physical interoperability. sensor watermeter/ pulvimeter 4-20 ma analog /rs232 rs 232/...
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SensorWatermeter/Pulvimeter
4-20 mAAnalog/RS232
RS 232/VOICE
Digital transmission via analog channel – principle of operation
CB/TETRA
IN
CB/TETRA
OUT
VOICE/RS 232RS232/TCP/IPRS 232/UDP
PC (SERVER)
HDW converter
HDW converter
STWconverter
Issues related to the concept:• CB channels used to telemetry and
telecommand• Packet Radio (KISS, AX.25) protocols
legality in Regione Puglia• Single node transmission range
Digital transmission via analog channel – realization concept
Sensor 1
Sensor 2
Watermeter
Pulvimeter
Optional ADC
Raspberry PI
4-20 mA
TNC Pi (HDW converter)
Radiostation (CB/TETRA)
Input
RS232/I2C Voice
Radiostation (CB/TETRA)
Output
TNC Pi (HDW converter)
Packet Radio
Voice Raspberry PI
RS232/I2C PC / Other
Devices
TCP/IPUSB
RS232
TNC-Pi
Radio Connection
Raspberry PI
Estimated hardware cost: 200 EUR per node
Digital transmission via analog channel – realization concept
Sensor 1
Sensor 2
Watermeter
Pulvimeter
Hardware ADC / Digital
integrator
4-20 mA
TNC - X (HDW converter)
Radiostation (CB/TETRA)
Input
RS232 Voice
Radiostation (CB/TETRA)
Output
TNC - X (HDW converter)
Packet Radio
Voice RS232
PC Other Devices
Estimated hardware cost: 250 EUR per nodeMain advantages of the solutions:• Price of implementation• Simplicity of operation• Lack of costs related to further use of the system
Main disadvantages of the solutions:• Integration and synchronization of the system• Lack of certainty of connection stability
Digital transmission via analog channel – example of realization on the basis of Polish ARPS network
Polish ARPS network which allows wireless data exchange across the country. Communication is based on AX.25 protocol. Infrastructure allows connection for every user equipped with proper radio communication instruments.
Sensor
4-20 mA
GPRS based multisensory data acquisition – principle of operation
Remote water meter reading
Watermeter
Pulvimeter
Sensor 2
TELEMETRIC MODULE
(AB MICRO)
GSM/GPRS
Issues related to the conceptions which are using GPRS:• Costs of operation related to static SIM card IP address• GPRS range map in Regione Puglia
Sensor 1
Sensor 2
Watermeter
Pulvimeter
Telemetric module
MobiCon Family
Analog
Digital
Industrial router TK700/TK800
family
Other devices supporting GPRS communication
(telephone, tablet)
GPRS (2G/3G/LTE)
PCTCP/IP
GPRS based multisensory data acquisition – realization concept
Estimated hardware cost: 130 – 450 EUR per node plus 500 EUR router cost
GPRS based multisensory data acquisition – realization concept
Sensor 1
Sensor 2
Watermeter
Pulvimeter
Input mobile router
e.g. Conel company products
RS232
Output mobile router
e.g. Conel company products
Other devices supporting GPRS communication
(telephone, tablet)
GPRS (2G/3G/LTE)
PC running VPN portal e.g.
SmartCluster
TCP/IP
ADC / Synchronization-
integration layout
Analog RS232
Estimated hardware cost: 500 - 1000 EUR per node depends from router version
Main advantages of the GPRS based solutions:• No transmission range limitations• Stability of the connection • Higher baudrate than in radio communication
Main disadvantages of the GPRS based solutions:• Transmission dependent from mobile operator• Higher price than CB/TETRA based solutions• Additional costs related with constant SIM card
IP address
Network based on licensed bands (frequencies from 433 to 868 MHZ)
principle of operation
Node 1
Node 2
Node 5
Node 6
Node 4
Node 3
Final node connected to
PC
Sensor 1
Sensor 2
Watermeter
Pulvimeter
ADC / Synchronization-
integration layout
Analog
RadiomodemNode 1
RS232
Sensor 1
Sensor 2
Watermeter
Pulvimeter
ADC / Synchronization-
integration layout
Analog
RadiomodemNode 2
RS232
Sensor 1
Sensor 2
Watermeter
Pulvimeter
ADC / Synchronization-
integration layout
Analog
RadiomodemNode 3
RS232 PC / Other interface device
Routed radio packet
Direct radio packet
Issues related to the conception:• Costs related to licensed
band frequency lease• Minimum single node range
Network based on licensed bands (frequencies from 433 to 868 MHZ)
realization concept
Sensor 1
Sensor 2
Watermeter
Pulvimeter
ADC / Synchronization-
integration layout
Analog
SATEL radiomodem
e.g. SATELLINE
RS232
Sensor 1
Sensor 2
Watermeter
Pulvimeter
ADC / Synchronization-
integration layout
Analog
SATEL radiomodem
e.g. SATELLINE
RS232
Sensor 1
Sensor 2
Watermeter
Pulvimeter
ADC / Synchronization-
integration layout
Analog
SATEL radiomodem
e.g. SATELLINE
RS232 PC / Other interface device
Routed radio packet
Direct radio packet
Estimated hardware cost: 500 -1750 EUR per node
Main advantages of the solution:• The most stable communication link
from presented concepts• Network dedicated for the particular
solution• Costs related to network maintenance
lower than GPRS solutions
Main disadvantages of the solution:• Node range highly dependent from
topography and obstacles situated on radio signal way
• Hard and time consuming implementation and testing process
• Low baudrate
Network based on licensed bands (frequencies from 433 to 868 MHZ)
example of usage on the basis of Polish SMOG system
SMOG is the forecasting of air pollution propagation system. Structure of the system is based on SATEL radiomodems which allows communication in frequency of 433 MHz licensed band. System is running in Malopolska province.
More information and current measurements values at:http://www.smog.imgw.pl/home
Summary
• Presented solutions are based on SECRICOM project ideas and conclusions
• All conceptions requires own software development and integration
• Tests will be the most time-consuming part of task realization
What do we have to know before implementation start?
• Precise requirements concerned to physical layer of the system (measured magnitudes, number of sensors, data storage and visualization)
• Which of presented solutions is the most suitable to requirements
• Requirements related to single point transmission range• Legality limitations related to wireless transmission
(licensed bands, CB radio/TETRA telemetry channels) in Regione Puglia
• Is in the Regione Pugalia wireless radio network working, if it is, what requirements has to be met to connect to the network (certification, legality)