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Application of Sensorml in the Description of the Prototype Air Monitoring Network

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Application of Sensorml in the Description of the Prototype Air Monitoring Network Application of SensorML in the Description of the Prototype Air Monitoring Network Mariusz Rogulski1 and Bogdan Dziadak2 1Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska 20, Warsaw, Poland 2Faculty of Electrical Engineering, Warsaw University of Technology, Pl. Politechniki 1, Warsaw, Poland Keywords: Interoperability, Sensor Networks, SWE, Air Monitoring. Abstract: The aim of this publication is to present the use of OGC standards – SensorML and Observations & Measurements – to describe the sensor network and measurement process in the prototype of air quality monitoring network launched in Nowy Sacz in Poland. Standards are used to create structures of relational databases to achieve interoperability through data collection in an orderly manner in the field of environmental data and in the description of monitoring process. This is important especially when the system consists of a number of low-cost measuring devices, that are designed to complement existing measurement network. 1 INTRODUCTION One way to ensure interoperability, is to provide the data in a clearly defined schemes available in There are currently a lot of mobile and stationary specialized for this purpose network services, with sensors that measure various environmental individual communication protocols. This type of parameters, operating independently or as part of a concept, regarding spatial data, is used in the Spatial number of measuring stations and monitoring Data Infrastructures (SDI). Using SDI allows for a networks. Constantly also there are performed certain extent to automate the use of shared metadata different types of observations and measurements, and spatial data. An example of the practical both in situ and in laboratories. All these activities implementation of such a model is INSPIRE, generate huge amounts of data about the state and consisting of SDI of individual EU Member States. quality of the environment on Earth. Experiences of the implementation phase of this one To fully benefit from such a huge and diverse the world’s largest data harmonisation effort of resources, as from global database (knowledge), it is environmental information infrastructures can be necessary to provide the possibility of exchanging found in (Kotsev et al., 2015). and sharing data between different systems, so it The key to ensure interoperability in the field of requires to ensure their interoperability. environmental data are specifications developed by The concept of interoperability is closely linked OGC (Open Geospatial Consortium) and standards to information technology, especially to information developed by ISO (International Organization for systems. Interoperability is generally referred to as Standardization). They provide the basis for the “... the ability of two or more components to construction and operation of spatial information exchange information, understand it and use it...” infrastructures, while ensuring technical (Institute of Electrical and Electronics Engineers, interoperability, both in terms of communication of 1990). More specifically, it may be defined as “... services and data exchange. the ability of various elements of functional OGC, ISO and other institutions have developed information systems to communicate, run programs, a number of norms, standards, specifications and or transfer data between them in a way that does not recommendations for description of measuring require from the user any knowledge, or requires processes and sensors (metadata) in order to achieve from the user a minimum knowledge on the unique interoperability capabilities. As one of the most properties of these elements...” (ISO/IEC 2003). important in this regard should be considered 307 Rogulski, M. and Dziadak, B. Application of SensorML in the Description of the Prototype Air Monitoring Network. DOI: 10.5220/0006379903070314 In Proceedings of the 3rd International Conference on Geographical Information Systems Theory, Applications and Management (GISTAM 2017), pages 307-314 ISBN: 978-989-758-252-3 Copyright © 2017 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved GISTAM 2017 - 3rd International Conference on Geographical Information Systems Theory, Applications and Management SensorML. Besides it, important are, among others: controller. Block structure of the transmitter, IEEE 1451, ECHONET, Device Description compatible with the present standard, is shown in Language (DDL), and Device Kit (Tang and Yeh, Figure 1. We can distinguish two main blocks: - 2001). Transducer Interface Module (TIM) and Network The aim of this publication is to present the use Capable Application Processor (NCAP). of OGC standard – SensorML – to describe the sensors and measurement process in the prototype of air quality monitoring network launched in Nowy Sacz in Poland. Section 2 summarizes the IEEE 1451 standard dedicated to transmitters service standardization, and primary elements of the specification SensorML 2.0. Section 3 describes the use of specifications Sensor ML to describe the measuring process of the air quality monitoring network based on prototype measuring stations. Section 4 provides a summary. 2 STANDARDS OF SENSORS AND DATA DESCRIPTION IN MEASUREMENT SYSTEMS Figure 1: Structure of the smart transmitter in accordance with IEEE 1451. Speaking about interoperability of measurement data, we mean primarily final results of the Transducer Interface Module consists of sensors or measuring system, which is properly formatted and actuators, conditioning and processing block A/D of described data block, most often located in a TEDES base and interface. It is responsible for standardized database or data warehouse. From proper installation and operation of the sensor and there, it can be easily downloaded and processed by for the performance of measurement. Sensors should other systems. However, it should be noted that the be operated in a plug and play mode. Data for the standardization of measurement data recording can sensor installation in the measurement system are be done from the very beginning of the measurement downloaded from an electronic database TEDS. process. Base TEDS is an electronic catalog card of the sensor which contains all the necessary information, 2.1 IEEE 1451 Standard such as: sensor type, measuring range, resolution, accuracy, sensitivity, response time, and In order to standardize communication protocols and identification data. use of intelligent sensors, standard IEEE 1451 Network Capable Application Processor is a (Saponara et al., 2011; Kim et al., 2011) has been block providing control of the measurement process established. The origins of the work on the standard and communication between the block of TIM dates back to the late twentieth century. Then the transmitters and higher layers of the measurement leading manufacturers of sensors, and IEEE and system. Most often, NCAP is a controller/computer NIST, began the work associated with the with the appropriate hardware and computing standardization of smart sensors use. The result of capabilities allowing for translations of interfaces this work is a family of standards under the title and coordination of the process. NCAP can also IEEE 1451 Standards for a Smart Transducer provide Web services and APIs dedicated to data Interface for Sensor and Actuators (Dziadak et al., receivers (Higuera and Polo, 2012). Communication 2011; Lee, 2007). In this standard, an intelligent with both the TIM block and the network, can be sensor is able to measure the acquisition, pre-process implemented using a variety of techniques and it, format the data and send them, using an available technologies (Pu et al., 2016). The coupling between network, to a higher level in the measurement the IEEE 1451 standard and the standards of upper system. The definition of a smart sensor is broad and layers of the OGC model, is shown in Figure 2. includes both sensors and actuators with a controller chip enabling network communications or with the 308 Application of SensorML in the Description of the Prototype Air Monitoring Network of this specification, can be found in (Conover et al., 2010). In (Chen et al., 2013), the authors described the use of SWE to create a Web directory service, based on directory service OGC, allowing for location, access, retrieval of parameters and use of sensors and algorithms describing the sensors. Technologies and standards included in the SWE were also used to create an event-based service receiving spatial data “on-demand” (Fan et al., 2013). In (Kotsev et al., 2016) OGC specifications are used in the AirSensEUR open software/hardware multi-sensor platform for measuring ambient air quality. In turn, (Chen et al., 2012) using BPEL and Figure 2: Structure of the smart transmitter in accordance with IEEE1451. processes chains from SensorML, proposed a method to create workflows for the so-called e- The IEEE1451 standard is used to operate smart science, that is those fields of science, which require sensors in the network for monitoring surface water calculations in highly distributed network quality in the Sado Estuary Natural Reserve in environments or using huge data sets processed in Portugal. In this network the communication grid environments. In (Hu et al., 2014) proposed a between the block of TIM transmitters and the model of sensors description for satellite remote NCAP block is carried out with the use of RFID sensing based on the object- and language-oriented (Postolache
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