Authors:
Octavian Postolache
1
;
Miguel Dias Pereira
1
and
Pedro Girão
2
Affiliations:
1
Instituto de Telecomunicações; EST Setúbal LabIM/IPS, Portugal
;
2
Instituto de Telecomunicações, Portugal
Keyword(s):
Reconfigurable measuring system, calibration control, real-time processing.
Related
Ontology
Subjects/Areas/Topics:
Environmental Monitoring and Control
;
Informatics in Control, Automation and Robotics
;
Instrumentation Networks and Software
;
Real-Time Systems Control
;
Signal Processing, Sensors, Systems Modeling and Control
Abstract:
This paper presents a field operating water quality monitoring system based on real time controller and FPGA module. The system features functioning includes in-situ automatic cleaning and calibration of stand alone sensors such as turbidity, pH or conductivity, on-line measurement of water quality parameters using the calibrated sensors. In order to perform the above mentioned calibration and measurement tasks the system uses a set of centrifugal pumps and electrovalves and associated embedded control materialized by the LabVIEW programmed FPGA module. The voltages associated with water quality measurement channels are acquired using a four channels analog input module that work also under FPGA control. The data processing tasks are distributed between the FPGA module and the real-time controller included in the system. A practical approach concerning the sensor model implementation capabilities using the real-time controller (NI cRIO-9002) or FPGA (NI cRIO-9003) is also included. I
n order to provide the wireless remote control of the system an Ethernet – wireless bridge (IEEE802.11g) and
client-server TCP software developed in LabVIEW were included in the system. A PDA based remote control solution was also implemented to evaluate system performance.
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