JPWO2005055164A1 - Environmental monitoring method and system - Google Patents

Abstract

The present invention uses a molecular recognition technology to construct an environment monitoring system for gas molecules and underwater molecules by networking using a database of physical structures and chemical properties of molecules to be detected and Web. The present invention transmits measurement data detected by a plurality of sensor devices installed at a plurality of monitoring points to monitor a gas generation state to a central server via a network. The central server has a database for molecular species estimation, compares and determines measurement data with data on the database, estimates the molecular species of gas, and identifies the molecular species judged to be harmful When the gas removal device installed at the monitoring point is activated.

Description

  The present invention specifies measurement data detected by a sensor device installed at a monitoring point via a network, and when a molecular species of a gas molecule or an underwater molecule determined to be harmful is specified, the monitoring point The present invention relates to an environmental monitoring method and system for operating an apparatus for removing gas molecules or underwater molecules installed in the system.

  In recent years, due to environmental concerns surrounding us, voices promoting air quality conservation and water quality conservation have increased, and the importance of environmental monitoring has been recognized. And the substance expected as the target is increasing with dioxin, NOx and so on. Therefore, development of sensors for various gases and underwater components is progressing. There are various principles of such sensors, but most of them use gas chemical properties (oxidation, reduction, etc.), and their selectivity is limited. Therefore, when it is necessary to perform strict component analysis, a large apparatus such as gas chromatography is currently used.

  In such air and water quality inspections, ministries and local government agencies have conducted analysis after bringing the target gas / liquid back in a sampling bag / sample bottle. As a familiar example, during the eruption of Miyakejima, in order to measure the concentration of sulfur-based gas in the island, Tokyo staff went directly to the site, brought the gas of each part of the island into a sampling bag and brought back to the inspection organization Did. In addition, river water quality tests are still being carried out by sampling. However, this method is labor intensive and labor intensive, and may expose the investigator to a hazardous gas atmosphere.

  On the other hand, the construction of a network by TCP / IP is approaching a complete form worldwide. Furthermore, it is expected that network construction by wireless LAN will become full-scale in the future. Wireless LANs were originally developed mainly for indoor use such as offices, but public services including the outdoors have recently begun to be deployed. The Narita Express is also being tested to provide service on the train. If such an infrastructure is further improved, it is expected that a wireless LAN can be used in the same manner as a mobile phone.

  Therefore, remote environment measurement using communication technology in recent years can be considered, but a precise analysis system has not been created for the above reasons. However, due to recent advances in nanotechnology, methods for measuring physical quantities that could not be measured, such as the shape and size of molecules, have evolved, and molecular recognition of gas and water components has become less difficult than before.

For example, Patent Document 1 discloses a technique that enables adsorption characteristics obtained for a plurality of types of gases to be prepared in a computer as a database and enables discrimination for unknown gases.
JP 2000-249644 A

  Accordingly, the object of the present invention is to construct an environmental monitoring system for gas molecules and underwater molecules by creating a database of physical structures and chemical properties of molecules to be detected and networking using the Web, using the molecular recognition technology described above. It is said.

  The environmental monitoring system of the present invention can be applied for real-time environmental information distribution, and in this case, it is possible to provide more remote information more accurately and in real time. For example, by constantly monitoring the gas concentration in the vicinity of the factory and providing the information to neighboring residents, the company does not give anxiety to neighboring residents, which in turn increases corporate value. .

  Further, the present invention can be applied to an indoor environment monitoring system such as a care sensor system, and in this case, an “environment control system” can be constructed by feedback control. For example, it is possible to construct a system that operates a gas removing device at the same time as detecting an abnormal gas generation.

  The environmental monitoring method of the present invention transmits measurement data detected by a plurality of sensor devices installed at a plurality of monitoring points to monitor the occurrence state of gas molecules or underwater molecules to a central server via a network, The central server includes a molecular species estimation database, compares and determines measurement data with data on the database, estimates molecular species of gas molecules or underwater molecules, and is considered to be harmful. When is identified, the gas molecule or water molecule removal device installed at the monitoring point is activated.

  In addition, the environmental monitoring system of the present invention is a centralized system in which measurement data detected by a plurality of sensor devices installed at a plurality of monitoring points is transmitted via a network in order to monitor the generation state of gas molecules or underwater molecules. A server, a molecular species estimation database provided in the central server, a molecular species identification unit that estimates the molecular species of gas molecules or underwater molecules by collating and determining measurement data with data on the database, and harmful And a control unit that operates a gas molecule or underwater molecule removal device installed at a monitoring point when a molecular species determined to be is identified.

  In addition, the present invention is applied to a care system in which the gas removal device such as the sensor device and the air purifier is arranged near the bed of a care recipient and the gas removal device is activated when a detection target substance is detected. can do.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide more information of a remote place more accurately and in real time. For example, by constantly monitoring the gas concentration in the vicinity of the factory and providing the information to neighboring residents, the company does not give anxiety to neighboring residents, which in turn increases corporate value. .

  The present invention can be applied to an indoor system. In this case, an “environment control system” can be constructed by feedback control. For example, it is possible to construct a system that operates a gas removing device at the same time as detecting an abnormal gas generation.

It is a figure which illustrates schematic structure of the environmental monitoring system which actualizes this invention. It is a figure which shows the care system which applied the environment monitoring system which embodies this invention for monitoring and control of the hospital room environment. It is a figure which illustrates the detailed arrangement configuration of the apparatus in each hospital room illustrated in FIG. Nitrogen-based gas with respect to the elapsed time is a graph showing temporal changes of (NH ₃₎ concentration. It is a graph showing the time variation of the sulfur-based gas (H 2 _S) concentration with respect to the elapsed time. It is a graph which shows the temperature change with respect to elapsed time. It is a graph which shows the humidity change with respect to elapsed time.

  Hereinafter, the present invention will be described based on examples. FIG. 1 is a diagram illustrating a schematic configuration of an environmental monitoring system that embodies the present invention. As shown in the figure, the sensor device monitors the gas generation status at a plurality of monitoring points (only two are illustrated), and the detection data is transmitted to the central server via TCP / IP. Hereinafter, the case where gas molecules are monitored will be described as an example. However, the present invention is not limited to surfactants (detergents) such as dodecylbenzenesulfonic acid that flows into rivers, harmful heavy metal ions, ammonia, hydrogen sulfide, trichloroethylene, and the like. The present invention can be similarly applied to monitoring of water molecules, such as detection of underwater molecules such as harmful substances, and / or detection of oil and fat substances dispersed in water.

  The central server is provided with a database for molecular species estimation, and sensor response characteristics for each molecular species are classified according to two parameters of molecular size and chemical property and stored in this database. For this reason, the measurement data of a remote place are collated and judged with the data on a database, and a molecular species can be estimated. In this way, sensor response characteristics of a large number of molecules are accumulated in this database, and the measurement results for unknown gases are collated with this database to identify molecular species and determine whether they are harmful to the human body. be able to. In other words, it is possible to sense by arranging only the minimum sensor device elements near the site or at regular intervals such as utility poles and power transmission towers, and the database for data verification can be centrally managed elsewhere. Become.

  Furthermore, by collecting information on molecules from each sensor in the database by this method, it is possible to form a self-learning sensor network that stores information in the database when unknown molecules are detected from the sensor output. Become. Alternatively, each sensor can download the molecular information from the database, thereby obtaining the latest molecular information list. According to the present invention, it is possible to create a content by connecting a molecular recognition technology, which is a simple measurement technology, to a network and forming a bidirectional network. As described above, the fusion of analysis technology and communication technology can facilitate further development of analysis technology including molecular recognition technology.

  This system is assumed to be installed in factories, hospitals, care facilities, etc., and outputs from a plurality of sensors are accumulated in an environmental data accumulation database of a central server. This database can be installed in any location such as the head office, and when an abnormality occurs, a warning is promptly displayed and a response is promptly performed. The environmental data stored in this database can be viewed from any terminal device connected to the TCP / IP network. By using a LAN, even if there is no special device, the sensor output can be browsed if there is a PC that can be connected to the Internet. For this reason, data browsing or system operation from a remote place is easily performed. Further, the environment data can be configured to be transmitted in response to a request from client software such as a web browser via a web server and the like via the network. Each of the sensor device, the gas removal apparatus, the Web server, and the like has an independent IP address, and data transfer is performed using a wireless LAN and a wired LAN.

  The gas removal device control unit of the central server purifies the spatial environment by performing feedback control of the output to the gas removal device when a harmful molecular species is identified by the molecular species identification unit. Thus, according to the present invention, the state of the entire space can be grasped by connecting the sensor unit and the gas removal unit by wireless communication or the like, and the gas removal efficiency can be improved. Furthermore, by using a TCP / IP network, it is possible to view the results of remote environmental monitoring with a PC that can be connected to the Internet without requiring a special device.

  According to the environmental monitoring system of the present invention, it is possible to monitor harmful gases “anywhere in the world” or “from anywhere in the world”. Even if you do not have a special receiver, you can instantly recognize the occurrence of gas from volcanic plumes and photochemical smog as long as you have a personal computer and a LAN. By combining this environmental monitoring system with a normal measurement sensor that does not use molecular recognition technology such as a temperature sensor and a humidity sensor, comprehensive environmental measurement becomes possible.

  FIG. 2 is a diagram showing a care system in which an environment monitoring system embodying the present invention is applied for monitoring and controlling a hospital room environment. This system gives an IP address to each handy-sized gas sensor, transfers the output to a remote server (data accumulation / abnormality detection server), and performs overall management of the sensor output. Also, as described above with reference to FIG. 1, the data stored in this server can be configured to be browseable from any terminal device connected to the server via the TCP / IP network.

  The detection target substances here are ammonia gas (urine detection) and methyl mercaptan gas (defecation detection), and a sensor for this is placed near the bed of the care recipient to detect abnormalities. The exemplary system detects these gases, and operates an air cleaner such as an air conditioner, a deodorizing device, and a deodorizing device as a gas removing device. Although only one hospital room is illustrated, each of a plurality of hospital rooms is usually provided with a similar device, and each is connected to a data accumulation / abnormality detection server via a wireless LAN.

  The sensor set has a sensor device that measures temperature and humidity in addition to the above-described two types of gas sensor devices, ammonia gas and methyl mercaptan gas. Each sensor output is transferred to the data accumulation / abnormality detection server via the wireless LAN transmission / reception unit. This data is sampled at regular intervals and transmitted to the server in time series. By assigning a network address to each sensor set, the location data can be recognized by the server.

  In this server, as described with reference to FIG. 1, the sensor output is automatically converted into the gas concentration using the data accumulated in the molecular species estimation database, and the gas concentration threshold is exceeded. It is determined that the condition is abnormal. When it is determined that the state is abnormal, the server controls the operation of an air conditioner, a deodorizing device, a deodorizing device, and the like via the wireless LAN transmission / reception unit.

  FIG. 3 is a diagram exemplifying a detailed arrangement configuration of devices in the respective hospital rooms illustrated in FIG. Communication between the gas removal device and each sensor exemplified as a filter and the transmission / reception unit has an independent IP address, and data transfer is performed using a wireless LAN and a wired LAN. Accordingly, the transmission / reception unit receives the four types of sensor outputs to the server and simultaneously receives a filter control signal from the server. A threshold is set for each numerical value, and when the detected value exceeds the threshold, feedback for controlling peripheral devices such as an air cleaner is provided. The sensor sensitivity for each gas can be corrected from the server. The server can be configured to determine the sensitivity deterioration of each detection unit from the index data of sensitivity deterioration, and to send a sensitivity correction function to each sensor at regular time intervals. Furthermore, by adding a configuration for detecting the output abnormality / life of each sensor, it is possible to prevent a failure and repair / replace the device promptly. As a result, it is possible to appropriately determine the deterioration of the gas sensor and reduce errors that occur in the malodorous gas concentration measurement.

  By providing the transmission / reception unit with a Web server function, the data accumulation / abnormality detection server connected to the transmission / reception unit parses the file transmitted as an html file, extracts sensor data, repeats this, and repeats the date and time. Is attached, secured as time-series data, and written and saved at regular intervals.

  In a server or a client (not shown) connected thereto, data of a specific sensor is acquired by a TCP command or http, and a graph is drawn at any time using accompanying time data for monitoring. This makes it possible to graphically display various types of gas concentrations, temperatures, and humidity. Further, by storing the data, it is possible to obtain past specific time zone sensor data by selecting a period.

  In this way, a system that simultaneously monitors a plurality of indoor gas concentrations in real time and recovers the state by an air purifier or the like when an abnormality occurs, and can also detect the occurrence of the abnormality by a Web browser even in a remote place. Can be built.

  The nursing care system applied for monitoring and control of the hospital room environment shown in Fig. 2 above was constructed, and the gas concentration was actually measured for 7 days (about 160 hours) with the cooperation of the care recipient. The results are as follows. For the measurement, a nitrogen gas sensor, a sulfur gas sensor, a temperature sensor, and a humidity sensor were used. One removing agent (activated carbon base) for sulfur-based gas and nitrogen-based gas was installed at each sensor installation location, and the gas removal effect was measured using the sensor.

FIG. 4 is a graph showing the time change of the nitrogen-based gas (NH ₃ ) concentration with respect to the elapsed time, and FIG. 5 is a graph showing the time change of the sulfur-based gas (H ₂ S) concentration with respect to the elapsed time. From these graphs, it is understood that the main odor factor is nitrogen-based gas. As can be seen from FIG. 4, the ammonia gas concentration is almost flat, but the output has increased since around the fifth day. It has been shown that the sensitive membrane may have reacted with a high concentration of sulfur-based gas.

  FIG. 5 shows that the sulfur-based gas concentration periodically changes in concentration during the day. When an auxiliary line is drawn at the point where the date changes, it can be seen that the concentration increase is concentrated in the time zone from 3 am to 6 am. This is considered to indicate that the gas concentration has increased in the time zone when there is no caregiver.

  6 and 7 are a graph showing a temperature change with respect to the elapsed time measured simultaneously and a graph showing a humidity change with respect to the elapsed time, respectively. There is almost no temperature change in the measurement environment, and it has been shown that humidity changes are the main cause of disturbance.

  In this way, it is possible to simultaneously monitor a plurality of gas concentrations in the room in real time, detect the occurrence of an abnormality, and estimate the cause.

Claims (12)

Measurement data detected by multiple sensor devices installed at multiple monitoring points to monitor the occurrence of gas molecules or underwater molecules is transmitted to a central server via a network,
The central server includes a database for molecular species estimation,
The measurement data is collated and determined with the data on the database to estimate the molecular species of gas molecules or underwater molecules, and when the molecular species judged to be harmful is identified, it is installed at the monitoring point An environmental monitoring method comprising operating a gas molecule or water molecule removal device. The environmental monitoring method according to claim 1, wherein transmission of data between the monitoring point and the central server is performed via TCP / IP. The environmental monitoring method according to claim 1, wherein the sensor device estimates molecular species of gas molecules or underwater molecules using data downloaded from a database for molecular species estimation via a network. The environmental monitoring method according to claim 1, wherein the central server further includes a database for storing environmental data, and is configured to be browsed from any terminal device connected to the network. The environmental monitoring method according to claim 1, wherein each of the sensor device and the gas molecule or underwater molecule removing device has an independent IP address, and data transfer is performed using a wireless LAN and a wired LAN. The environmental monitoring method according to claim 1, wherein the sensor device and a gas removal device such as an air purifier are arranged near a bed of a care recipient and the gas removal device is operated when a detection target substance is detected. A central server for transmitting measurement data detected by a plurality of sensor devices installed at a plurality of monitoring points to monitor the generation state of gas molecules or underwater molecules, via a network;
A database for molecular species estimation provided in the central server;
Collating and determining the measurement data with the data on the database, and a molecular species specifying unit for estimating the molecular species of gas molecules or underwater molecules,
When a molecular species that is determined to be harmful is identified, a control unit that operates a gas molecule or water molecule removal device installed at the monitoring point is provided.
Environmental monitoring system consisting of The environmental monitoring system according to claim 7, wherein transmission of data between the monitoring point and the central server is performed via TCP / IP. The environmental monitoring system according to claim 7, wherein the sensor device estimates molecular species of gas molecules or underwater molecules using data downloaded from a database for molecular species estimation via a network. The environmental monitoring system according to claim 7, wherein the central server further includes a database for storing environmental data, and is configured to be browsed from any terminal device connected to the network. The environmental monitoring system according to claim 7, wherein each of the sensor device and the gas molecule or underwater molecule removing device has an independent IP address, and data transfer is performed using a wireless LAN and a wired LAN. The gas removal apparatus such as the sensor device and the air purifier is disposed near a bed of a care recipient, and a nursing care system that operates the gas removal apparatus when detecting a detection target substance is configured. Environmental monitoring system.

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