WO2011068287A1 - Ubiquitous-based intelligent city gas safety management system - Google Patents

Ubiquitous-based intelligent city gas safety management system Download PDF

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Publication number
WO2011068287A1
WO2011068287A1 PCT/KR2010/001914 KR2010001914W WO2011068287A1 WO 2011068287 A1 WO2011068287 A1 WO 2011068287A1 KR 2010001914 W KR2010001914 W KR 2010001914W WO 2011068287 A1 WO2011068287 A1 WO 2011068287A1
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city gas
data
ubiquitous
status information
management system
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PCT/KR2010/001914
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English (en)
French (fr)
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Jeong Seok Oh
Jang Sik Park
Jeong Rock Kwon
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Korea Gas Safety Corporation
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Publication of WO2011068287A1 publication Critical patent/WO2011068287A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Energy or water supply
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/20—Arrangements in telecontrol or telemetry systems using a distributed architecture
    • H04Q2209/25—Arrangements in telecontrol or telemetry systems using a distributed architecture using a mesh network, e.g. a public urban network such as public lighting, bus stops or traffic lights
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
    • H04Q2209/43—Arrangements in telecontrol or telemetry systems using a wireless architecture using wireless personal area networks [WPAN], e.g. 802.15, 802.15.1, 802.15.4, Bluetooth or ZigBee
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter

Definitions

  • This invention relates to a ubiquitous-based intelligent city gas safety management system, more particularly to a ubiquitous-based intelligent city gas safety management system that enhances safety by monitoring real time status of the city gas facilities using a sensor network installed therein, and prevents gas accident through effective maintenance and management, and enables a rapid response when a gas accident occurs.
  • RFID radio frequency identification
  • USN ubiquitous sensor network
  • a USN that provides an optimum function for a user through an automatic recognition of the condition and status of each object by assigning a computation and network function to every object in the network, can be classified into several layers such as an information resource, a BCN backbone, a middleware, and an application service layer; the information resource layer may comprise a sensor node measuring status parameters from the relevant facility and a base station (sync node) collecting information from the sensor node and transmitting the information to a server.
  • Key requirements for a device in an information resource layer are low power consumption, flexible I/O, compactness for a hardware component; and efficient resourcing, reusability, ad-hoc network supportability, bottleneck-free operation for a software component.
  • a functionality to guarantee an accurate functional operation and minimize a side effect caused by a non-relevant event a scalability to maintain the functionality and performance characteristics independent of the increase or decrease in the numbers of the sensor node
  • a fault tolerance to insure the transmission of the information to the objective base station by a self-configuration if a sensor node fails due to a defect or an error
  • a cost to build a network of minimum cost while sufficing all the required functions are required: a functionality to guarantee an accurate functional operation and minimize a side effect caused by a non-relevant event; a scalability to maintain the functionality and performance characteristics independent of the increase or decrease in the numbers of the sensor node; a fault tolerance to insure the transmission of the information to the objective base station by a self-configuration if a sensor node fails due to a defect or an error; and a cost to build a network of minimum cost while sufficing all the required functions.
  • a city gas facility can be largely classified into pipelines, regulators, valves, test boxes (T/B), meters and others, and the status parameters can be largely classified into environmental parameters such as earthquakes, and land subsidence, and management parameters such as electricity type, pressure, gas leakage, etc.
  • a remote monitoring system such as Supervisory Control and Data Acquisition (SCADA) system, that monitors operating status of the major supplying equipments and measures pressure of the supplying pipeline network, is installed in such city gas facilities and performs data analysis, storage, and monitoring functions.
  • SCADA Supervisory Control and Data Acquisition
  • a remote monitoring and control system for a city gas facility exposed to a harsh environment such as a large scale excavation site or a specific area is hardly available, and besides, a system that provides a service utilizing wireless-based ubiquitous technology is hardly available at this time.
  • the purpose of the present invention is to provide a ubiquitous-based intelligent city gas safety management system that prevents gas accident by monitoring real time status of the city gas facilities by installing a sensor network infra therein, and enables a rapid response when a gas accident occurs.
  • a ubiquitous-based intelligent city gas safety management system of the present invention is comprised of: a data translator that converts various status information, received from a sensor network that monitors the condition of a city gas facility, into a predetermined common message format; and a middleware server comprised of a database that stores status information received from the data translator, a data integration control module that stores status information received from the data translator into the database, a data mining module that estimates the condition of the city gas facility by analyzing the accumulated status information in the database, a data monitoring module that inspects status information received from the data translator and determines if the city gas facility is abnormal, and an event managing module that informs the manager’s terminal of the abnormality of the city gas facility when the monitoring module determines that the city gas facility is abnormal.
  • the ubiquitous-based intelligent city gas safety management system of the present invention may further comprise a short-range wireless communication based sensor network such as Zigbee, Bluetooth, etc.
  • the short-range wireless communication based sensor network may comprise a sensor node that measures status information of a city gas facility, a sync node that collects status information from the sensor node and transmits status information to the data translator, a frequency translator that converts frequency band of the signal received from the sensor node via wireless communication and transmits this frequency-converted signal to the sync node via wireless communication, and a repeater that transmits the signal received from the frequency translator to the sync node via wireless communication.
  • Above described nodes i.e. sensor node, frequency translator, repeater, and sync node
  • the sensor node that is attached to a gas valve compartment or a pipeline buried underground and measures gas pressure, gas leakage, water level, protection current, protection potential, etc.; the purpose of the frequency translator is to enable communication between the sensor node and the sync node that is installed on the ground surface.
  • the frequency translator communicates with the sensor node with a frequency band (i.e. 424 MHz) that enables communication between underground and overground within a certain distance, while communicates with the sync node with 2.4GHz frequency band for example.
  • the ubiquitous-based intelligent city gas safety management system of the present invention may further comprise a medium/long-range wireless communication (i.e. CDMA, Wibro etc.) type sensor network.
  • a medium/long-range wireless communication i.e. CDMA, Wibro etc.
  • the medium/long-range wireless communication based sensor network can be comprised of: a sensor node that measures status information of a city gas facility; a sync node that collects status information from the sensor node and transmits status information to the data translator.
  • the sensor node that is attached to a gas valve compartment or a pipeline buried underground and measures vibration, stress, gas pressure, gas leakage, water level, protection current, protection potential, etc.
  • pressure regulators that increase or decrease the pressure of the city gas are installed everywhere in the vicinity of a road, and generally equipped with exclusive communication device for a communication with a remote server. Therefore, a short-range communication method can be applied to the corresponding sensor network if the distance between the pressure regulator and the city gas facility to be monitored is less than, for example, one kilometer. For such communication, it is desirable that the sync node is installed in the pressure regulator and communicates with the data translator using the communication device in the pressure regulator.
  • a ubiquitous-based intelligent city gas safety management system of the present invention enhances safety by monitoring real time status of the city gas facilities using a sensor network installed therein, and prevents gas accident through effective maintenance and management, and enables a rapid response when a gas accident occurs.
  • FIG. 1 is a pictorial diagram illustrating a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention.
  • FIG. 2 is a block diagram of a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention.
  • FIG. 3 is a set of pictures showing test site examples for pressure monitoring of the city gas facilities.
  • FIG. 4 is a pictorial schematic diagram showing an exemplary measurement environment for a protection potential.
  • FIG. 5 is a graph showing a test result of power intensity measurements.
  • FIG. 6 is a block diagram of a short-range wireless communication type sensor network in accordance with an exemplary embodiment of the present invention.
  • FIG. 7 is a block diagram of a medium/long-range wireless communication type sensor network in accordance with an exemplary embodiment of the present invention.
  • FIG. 8 is a block diagram of a middleware server for management of a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention.
  • Table 2 shows possible monitoring candidates of major city gas facilities and environmental characteristics thereof together with status parameters.
  • Table 3 shows measurement parameters and its acceptable ranges according to the sensor type.
  • the corrosion condition can be affected by the protection potential, dipole potential, resistivity of soil, interference from other facilities(crossed pipelining, pressurized inlet pipeline), but the protection potential is considered as the most useful factor in monitoring the corrosion condition of the pipeline due to reasons of such as frequent measurements and quantification.
  • Wireless communication methods applicable to city gas facilities can be classified into short-range and medium/long-range wireless communication.
  • RF communication For short-range wireless communication methods, RF communication, IEEE 802.15 based Bluetooth(802.15.1), UWB(802.15.3), and Zigbee(802.15.4) are available.
  • Zigbee a short-range wireless communication operating at 868MHz, 902-928MHz, and 2.4GHz, is capable of data transmission with a maximum speed of 250Kbps, and can handle maximum 255 peripheral devices. Zigbee s strongest point is that it can provide a self-configurable mesh network.
  • Bluetooth an industry standard of a wireless Personal Area Network (PAN), provides a safe and low cost RF wireless communication between various devices. Bluetooth has a wide service angle and can easily overcome most obstacles existing along the transmission pathway.
  • UWB developed by the United States Department of Defense in 1950s for a military purpose, is a method that had long been prohibited for a commercial use. UWB is superior to the conventional wireless LAN in terms of speed and power consumption, and very useful for a large capacity multimedia transmission between the devices.
  • Wireless Local Area Network (WLAN) is mainly used as a communication network between computers and peripheral devices and communicates via access point.
  • Wibro For medium/long-range wireless communication methods, Wibro, WiMax, and Code Division Multiple Access (CDMA) are available, and in addition to these methods other technology such as 6LoPAN may also be available.
  • CDMA is the most widely used wireless mobile communication technology in the world at this time. CDMA has an advantage that it can communicate on a national scale, but also has disadvantages such as high power consumption and high cost.
  • Wimax is a long-range wireless communication that supports a wider access area and faster data communication speed compare with conventional wireless LAN technology, and capable of providing 100Mbps broadband internet access service within the area having approximately 70 kilometer radius from the base station.
  • Wibro is a terminology indicating a mobile internet service, and means a standard data transmission technology equipped with the most efficient structure for a high speed data transmission without considering voice service. Since Wibro has been focused on the interactive services in urban areas, it is not a suitable technology for existing industrial facilities.
  • FIG. 1 is a pictorial diagram illustrating a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention.
  • FIG. 2 is a block diagram of a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention.
  • a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention may comprise a sensor network 100, a data translator 200, an intelligent city gas management middleware server 300, and an intelligent city gas management application service server 400.
  • the sensor network 100 may comprise: a pressure monitoring sensor network 110 that measures pressure in a particular pressure region; a vibration and stress monitoring sensor network 120 that monitors vibration and stress of an exposed pipeline; a gas valve compartment monitoring sensor network 130 that monitors abnormal conditions such as gas leakage inside of the gas valve compartment; and a protection potential monitoring sensor network 140 that monitors corrosion conditions of the buried pipelines.
  • the gas valve compartment was selected first among the various pressure sections because it was considered as the worst area for a wireless communication among the pressure monitoring sections.
  • an area having a pressure regulator, which commonly carries its own exclusive communication device, within one kilometer radius from the gas valve compartment was selected as a pressure monitoring environment.
  • a short-range wireless communication is considered appropriate for such environment. Since the gas valve compartment is surrounded by concrete and metal covers, a short-range wireless communication network must be seriously considered because it enables communication between the equipments inside of the gas valve compartment and the equipments outside in an open area as well as communication between the equipments outside in the open area,.
  • FIG. 3 shows a set of pictures of the test sites, and many tests were performed at these test sites.
  • Table 5 shows working distance between the equipments inside of the gas valve compartment and the equipments outside in an open area, and working distance between the equipments outside in the open area when using basic functions of the module for each communication method. Data transmission accuracy is same for both methods and transmission speed is not so important for the present pressure monitoring environment. Main focus of the test was on the working distances and self-configurability between nodes of the network when a plurality of nodes exists. According to the test result, Zigbee technology was found to be more adequate than Bluetooth technology under the present pressure monitoring environment, because even though the maximum output signal intensity of the Bluetooth module is ten times higher than the Zigbee module, Bluetooth module has shorter working distance.
  • the Zigbee module can communicate better than the Bluetooth module for a weak signal.
  • Zigbee communication seems suitable for the pressure monitoring environment where multiple nodes are installed because Zigbee can build a self-configurable network such as multi-hop(mesh) network, so the communication from inside the valve compartment to an open area outside can be performed.
  • Protection potential monitoring sensor network 140 collects corrosion information from the data logger of the buried pipeline and transmits this data to a relaying point, i.e. pressure regulator, via short-range wireless communication using an overground antenna, then it may send the data to a server via medium/long-range communication using CDMA communication method that is adopted by the transmitter in the specific gas unit (sync node) at the relaying point.
  • a relaying point i.e. pressure regulator
  • FIG. 4 is a pictorial schematic diagram showing a measurement environment for a protection potential.
  • a protection current flows through the buried pipeline, then the data logger in the test box (TB BOX) measures potential between the reference electrode and the buried pipeline.
  • TB BOX data logger in the test box
  • Inventors of this invention measured maximum working distance and success rate for short-range communication methods, Bluetooth Class 1 and 2, in an open area using a dipole and a patch antenna.
  • Operating frequency of a Bluetooth Class 1 is 2.4GHz and the output is 63.095mW (18dbM).
  • ESD 100 having recommended working distance of approximately 300 meters according to the specification.
  • For a patch antenna slight directivity was observed as there is a variation in the sensitivity with respect to the direction of the antenna, and communication was satisfactory up to approximately 1.12 kilometers when no obstacle exists in the line of sight. Communication failed when buildings block the line of sight, but when there is an obstacle such as a hill or tree, the success rate was approximately 50% of the success rate of the case having no obstacle.
  • An identical test was performed using a dipole antenna instead of a patch antenna; according to the test result, communication success rate using a dipole antenna was 80% of the success rate using a patch antenna.
  • Bluetooth Class 2 uses same operating frequency as Bluetooth Class 1, but has an output of 2.51mW, approximately 4dbm, that is lower than Bluetooth 1.
  • Module ESD 200 having a recommended working distance of approximately 100 meters, was used in the test. According to the result of the test performed using identical procedure used for Bluetooth Class 1, communication up to 100 to 200 meters in straight-line was satisfactory, but communication was impossible at all when the distance exceeds over 500 meters. When there is an obstacle, the communication success rate was approximately 50% of the success rate of the case having no obstacle, and communication success rate using a dipole antenna was 80% of the success rate using a patch antenna.
  • RF test was performed using LinkWiser-400 having 10 mW output and operating frequency of 427MHz. Successful working distance was less than 100 meters when no obstacle exists in the line of sight, and communication was impossible at all when the distance exceeds over 300 meters. Although communication failed when obstacles like buildings present in between the communication modules in case of Bluetooth, communication success rate of the RF module was improved by 50% than that of 2.4 GHz communication. Specifications of the devices used in the test for Bluetooth and RF modules are shown in Table 6, and the test results are summarized in Table 7.
  • Gas valve compartment monitoring sensor network 130 transmits status information to the server after measuring gas leakage, water level, and current inside of the gas valve compartment.
  • a pressure regulator may or may not exist near the gas valve compartment depending on the city gas company and the environmental condition of the site.
  • Inventors of the present invention designed a wireless network configuration capable of transmitting data to a server system via medium/long-range wireless communication in an environment where no pressure regulator exists within one kilometer radius from the gas valve compartment. After selecting thirteen city gas valve compartments of Seoul City Gas Company in accordance with above described environment, relevant test was performed via CDMA and Wibro that are available for a medium/long-range wireless communication at the time. Since the entrance of the gas valve compartment is sealed with a metal cover, that could be a single or dual cover depending on the city gas company and site, success rate was analyzed after classification of the cover status such as metal cover opened/closed, single cover closed, dual cover closed etc.
  • FIG. 5 is a graph showing the result of the value of power intensity measurement test.
  • the measured value of power intensity is -55dbm with the dual cover fully opened, -67dbm with only the inner metal cover of the dual cover closed, and -77dbm with the dual cover fully closed.
  • test For a full-scale communication test under the gas valve compartment monitoring environment, the test was performed through a commercial communication network in service, and thirteen test sites under the control of Seoul City Gas Company that are located in a poor reception area or the most remote area were selected.
  • a transmission/reception program developed for the environmental monitoring test of the gas valve compartment, a CDMA modem, a Wibro terminal etc. were used in the test.
  • Two wireless modems were connected to two notebook computers in pairs for a data transmission/reception control, and one pair was placed inside the gas valve compartment and the other pair was placed in a vehicle outside, then communication success rate was measured by transmitting/receiving data between the test sets.
  • Communication test for Wibro modems was also performed using identical test procedures as the CDMA case.
  • a vibration/stress monitoring sensor network 120 can be installed at an important city gas facility in a specific area such as a pipeline on a bridge or an exposed pipeline at an excavation site etc., perform monitoring of a natural phenomenon such as ground subsidence, diastrophism, man-made impact, or vibration (i.e. from automobiles etc.) that is not perceived by the employees on site, and transmit these data directly to a data specific gas unit (i.e. sync node) or server via appropriate type of wireless communication.
  • a pipeline on a bridge in a specific area is constantly exposed to unexpected external weight due to its particular condition, and the safety of the pipeline is occasionally determined by the condition of the bridge. Especially, city gas and water pipelines in a subway construction work area are being exposed for a long time.
  • a short-range wireless communication can be applied for a city gas facility when it is located near the exclusive communication device of the pressure regulator, otherwise a medium/long-range wireless communication may be applied.
  • one kilometer is suggested as a reference distance to be used in selection of communication type, but the reference distance can be properly adjusted according to cost reduction and technology enhancement.
  • a short-range based communication requires low-power self-configurable devices for the overground facilities in the region.
  • the purpose of self-configurability is to send data to the objective place by reorganizing data transmission path through searching of neighboring nodes when a specific device fails to operate.
  • An IEEE 802.15.4 mesh network or a star network can be a basic sensor network having self-configurable transmission path.
  • Devices can be classified as a full function device (FFD) and reduced function device (RFD) depending on their hardware capability.
  • a mesh network relaying and self adjusting between the devices is possible since all the devices participating in the network are comprised of FFDs that have sub-network adjusting function; in a star network, however, data is not relayed between the devices since data is collectively directed to a specific device because not all the devices are FFDs.
  • Devices in the network should be utilized in an energy-efficient manner. Devices may be participated in network in wake-up mode (i.e. activated state) when they are being driven or involved in an event, or in sleep mode when they are in deactivated state; the energy of the devices can be efficiently managed by energy preservation or generation. When a short-range wireless communication is to be applied to an underground city gas facility under a closed environment, communication between the underground and the overground must be viable.
  • the city gas pipelines are installed along the street, the data transmitted from a buried city gas facility existing near the street via wireless communication should be reached to the top of the neighboring overground structures (i.e. buildings, power line poles, etc.). Since a city gas valve box is commonly installed along the street, an overground structure is expected within eighty meters in a straight line from the city gas box
  • the most widely used and reliable method is recommended and transmission of status information from the closed underground environment and the overground must be viable; in addition, the method should be capable of transmission to a middleware server or a specific gas unit such as gas governor with communication device
  • FIG. 6 is a block diagram of a short-range wireless communication type sensor network in accordance with an exemplary embodiment of the present invention.
  • a sensor network using a short-range wireless communication of the present invention may comprise a sensor node 10, a frequency translator 20, a repeater 30, and a sync node 40.
  • the sensor node 10 measures status information of a city gas facility and transmits measured status information via, for example, 424.7MHz frequency band.
  • Inventors of this invention confirmed that communication is possible over eighty meters under the frequency band lower than 800MHz although the working distance in the 2.4GHz band is short when the metal cover of the valve box is closed as shown in FIG. 5.
  • the frequency translator 20 converts the frequency band of the received signal from the sensor node 10 into a high frequency, for example, 2.4GHz and transmits this frequency converted signal to the sync node 40. In other words, the frequency translator 20 connects the sensor node 10 buried underground with the sync node 40 located overground.
  • the repeater 30 is a device that transmits received data from the frequency translator 20 or other repeater to the sync node 40. This device is installed in a proper location through a signal intensity measurement with respect to the distance for a smooth data transmission.
  • the sync node 40 collects status information from the sensor node 10 and transmits this information to a data translator 200; it is installed in a pressure regulator and transmits data to the data translator 200 using the communication device thereof.
  • FIG. 7 is a block diagram of a medium/long-range wireless communication type sensor network in accordance with an exemplary embodiment of the present invention.
  • a sensor network using a medium/long-range communication of the present invention may comprise a sensor node 50 and a sync node 60.
  • the sensor node 50 measures status information of the city gas facility and transmits measured status information to the sync node 60 or directly to a data translator 200.
  • the sync node 60 transmits the received status information from the sensor node 10 to the data translator 200; it is installed in a pressure regulator and transmits data to the data translator 200 using the communication device thereof.
  • the data translator 200 converts heterogeneous data format received from the pressure monitoring sensor network 110, the vibration/stress monitoring sensor network 120, the gas valve compartment monitoring sensor network 130, and the protection potential monitoring sensor network 140 into a unified message format (i.e. XML), and transmits status information that is converted into the unified message format to a middleware server 300.
  • a unified message format i.e. XML
  • An individual plug-in/plug-out type converter for each corresponding sensor network is installed. Adding or deleting of a specific sub-network does not affect the main system.
  • the data translator 200 may comprise: a data receiver that receives data through various sensor network interfaces; a parser that checks for correct syntax and builds a data structure; a data translator that converts parsed data into a unified format; and a data transmitter that transmits data to the middleware server 300.
  • FIG. 8 is a block diagram of a middleware server for management of a ubiquitous-based intelligent city gas safety management system in accordance with an exemplary embodiment of the present invention.
  • a middleware server 300 of the present invention may comprise: a network interface component 310; a data integration control manager 320, a USN directory service 330; an event managing module 341, a data mining module 342, a history managing module 343, a monitoring module 344, a USN directory service manager 350, a query executer 360, a metadata manager 370; and an application service interface 380.
  • the network interface component 310 receives data from various data translators and transmits the received data to the data integration control manager 320; it also checks the compatibility of the data received from the data translator.
  • the data integration control manager 320 transmits data received from the network interface component 310 to the intelligent information layer as shown in FIG 8; especially, it accumulates status information received from the data translator through the network interface component 310 into the data base 500; it is linked with the USN directory service 330 and controls overall operation of the middleware.
  • the intelligent information layer may comprise an event managing module 341, a data mining module 342, a history managing module 343, a monitoring module 344, and a database 500.
  • the data mining module 342 generates meaningful data that can predict, for example, status of a city gas facility by analyzing status information accumulated in the database 500.
  • the monitoring module 344 determines whether the city gas facility is abnormal by inspecting status information received from the data translator through the network interface component 310.
  • the event managing module 341 informs the manager’s terminal of the problem of the city gas facility when the monitoring module 344 acknowledges a problem in the city gas facility.
  • a text message can be a possible way of notification in this case.
  • the database 500 is a data warehouse.
  • the USN directory service manager 350 provides a USN directory service by linking with the data integration control manager 320 and is linked with an application service server 400.
  • the query executer 360 handles queries received from the application service server 400 and transmits the result of execution back to the application service server 400.
  • the metadata manager 370 allows registration and confirmation of metadata related to the middleware server 300 and sub-network, and enables dynamic updating of metadata.
  • Types of metadata can be classified into: a static data such as a sub-network name, a status information type, a driver type, a position information, etc.; and a dynamic data such as number of network resource, amount of power, communication status, resource failure, etc.
  • the application service interface 380 links the application service server 400 and the intelligent information layer.
  • the USN directory service 330 may comprise: an ID manager that performs generation/allocation/management function for an identifier that can identify individual USN resources; a registration manager that registers metadata; a deletion manager that deletes metadata; a search manager that confirms metadata; a correction manager that corrects metadata; a updating manager that updates metadata; a link manager that links with the database; and a location manager that links with a location search service for searching a location of a metadata for which access is requested.
  • the middleware server 300 provides an open type Application Programming Interface (API) for a smooth linking with the application service server 400, and the open type API may comprise:
  • a heterogeneous network abstraction API that provides a unified interface API by abstraction of the communication with adapter layer (i.e. data translator), and provides maintainability and expandability for the network;
  • the middleware server 300 may further comprise a facility control module (not shown) that remotely controls sensor node that measures status information of the city gas facility.
  • the facility control module is capable of changing the measurement period or the threshold values of the sensor nodes.
  • the data translator 200 converts the data received from the above described facility control module into data having right format for a corresponding sensor node and transmits the converted data to the sensor node.
  • the application service server 400 is a layer that provides a service, which is requested by a user or a manger, by receiving data through an open type API provided by the middleware server 300.
  • An application service layer can be developed into various types of service, and four major basic services are provided according to the present invention as shown in Table 9.
  • a ubiquitous-based intelligent city gas safety management system of the present invention is not limited by the above described exemplary embodiments, but various modifications and alterations are possible without departing from the scope and technical spirit of the present invention.

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CN107871204A (zh) * 2017-10-09 2018-04-03 中国电子科技集团公司第二十八研究所 一种城市运营中心系统架构和工程系统
JP2018145688A (ja) * 2017-03-06 2018-09-20 Toto株式会社 通信システム及びトイレシステム
CN108616580A (zh) * 2018-04-10 2018-10-02 广州新科佳都科技有限公司 基于ice消息中间件的分布式系统及其数据传输方法
US11118508B2 (en) 2016-08-24 2021-09-14 Ihi Corporation Variable displacement turbocharger
CN114838973A (zh) * 2022-07-06 2022-08-02 中国矿业大学(北京) 综合管廊燃气舱用应急响应系统的效用检验平台
US11519809B2 (en) * 2017-12-06 2022-12-06 Operations Technology Development, Nfp System and method for gas sensing and monitoring
CN115614678A (zh) * 2022-12-16 2023-01-17 成都秦川物联网科技股份有限公司 智慧燃气管道电化学腐蚀评估方法和物联网系统、介质
CN117408640A (zh) * 2023-12-11 2024-01-16 河北宁鸣通信技术有限公司 一种燃气安全智慧动态可视化管理方法及系统

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CN102638903A (zh) * 2012-03-30 2012-08-15 华东理工大学 一种基于无线传感器的工业振动监测系统
CN103308568A (zh) * 2013-05-28 2013-09-18 浙江大学 一种用于农产品品质远程监测的无线电子鼻系统
CN103592371A (zh) * 2013-11-28 2014-02-19 云南电力试验研究院（集团）有限公司电力研究院 一种瓷支柱绝缘子振动声学在线监测装置
WO2017165008A1 (en) * 2016-03-21 2017-09-28 Honeywell International Inc. Method and apparatus to acquire parameters of gas metering
CN105976110A (zh) * 2016-05-05 2016-09-28 云神科技投资股份有限公司 一种智慧城市管理的方法及系统
US11118508B2 (en) 2016-08-24 2021-09-14 Ihi Corporation Variable displacement turbocharger
CN106652288A (zh) * 2017-03-03 2017-05-10 厦门精图信息技术有限公司 一种城市市政综合管廊安全保障系统
JP2018145688A (ja) * 2017-03-06 2018-09-20 Toto株式会社 通信システム及びトイレシステム
CN107454153B (zh) * 2017-07-21 2021-01-26 深圳市盛路物联通讯技术有限公司 一种通信监控方法及物联网服务器
CN107454153A (zh) * 2017-07-21 2017-12-08 深圳市盛路物联通讯技术有限公司 一种通信监控方法及物联网服务器
CN107871204A (zh) * 2017-10-09 2018-04-03 中国电子科技集团公司第二十八研究所 一种城市运营中心系统架构和工程系统
US11519809B2 (en) * 2017-12-06 2022-12-06 Operations Technology Development, Nfp System and method for gas sensing and monitoring
CN108616580A (zh) * 2018-04-10 2018-10-02 广州新科佳都科技有限公司 基于ice消息中间件的分布式系统及其数据传输方法
CN114838973A (zh) * 2022-07-06 2022-08-02 中国矿业大学(北京) 综合管廊燃气舱用应急响应系统的效用检验平台
CN114838973B (zh) * 2022-07-06 2022-09-30 中国矿业大学(北京) 综合管廊燃气舱用应急响应系统的效用检验平台
CN115614678A (zh) * 2022-12-16 2023-01-17 成都秦川物联网科技股份有限公司 智慧燃气管道电化学腐蚀评估方法和物联网系统、介质
US11879599B2 (en) 2022-12-16 2024-01-23 Chengdu Qinchuan Iot Technology Co., Ltd. Methods, Internet of Things systems, and mediums for assessing electrochemical corrosion of smart gas pipeline
CN117408640A (zh) * 2023-12-11 2024-01-16 河北宁鸣通信技术有限公司 一种燃气安全智慧动态可视化管理方法及系统
CN117408640B (zh) * 2023-12-11 2024-02-23 河北宁鸣通信技术有限公司 一种燃气安全智慧动态可视化管理方法及系统

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