JP2004280262A - Portable danger notification device, danger notification server and danger degree decision method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable danger notification device and a danger notification server, allowing a person absent in an arbitrary place of occurrence of an accident such as gas leak to accurately cope with the accident in time of the accident. <P>SOLUTION: This portable danger notification device 1 notifying a remote place of danger on the basis of surrounding gas concentration has: a position detection part 13 detecting a current position; a gas concentration detection part 11 detecting the surrounding gas concentration; a notification information production part 12 producing notification information showing that the gas concentration exceeds a threshold value; and a wireless communication part 14 transmitting the notification information and position information at the point of time when the notification information is produced to a danger notification device 20 that is a notification destination executed with its notification via a mobile communication network 60 when the notification information is produced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable danger notification device that notifies a danger to a remote location based on the concentration of surrounding gas, and a danger notification server that notifies a danger to a remote location.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a portable danger notification device that detects a gas concentration using a gas sensor and issues an alarm, and a gas abnormality detection system using the same have been known.
[0003]
FIG. 5 is a block diagram showing a schematic configuration of a conventional gas abnormality detection system. The conventional gas abnormality detection system 240 includes a danger notification device 232 carried by an operator working at a gas construction site or the like, a safety center 241, a mobile communication network 242, and a telephone network 243.
[0004]
The danger notification device 232 includes a portable gas detection alarm 220 that detects an ambient gas concentration and issues an alarm, and a communication portable terminal (dedicated PHS) 224 that sends an alarm as a wireless signal. The gas detection alarm 220 and the communication portable terminal 224 are connected via connection means including jacks 223 and 228 and a connection cord 227 and the like.
[0005]
When the communication portable terminal 224 is not connected, the gas detection alarm 220 issues an alarm when the gas concentration exceeds a predetermined level, and disappears when the gas concentration returns to the original level. Have been. Further, the gas detection alarm 220 is configured to continue to emit an alarm when the gas concentration exceeds a predetermined level when the communication portable terminal 224 is connected via the connection means. The state in which the alarm continues to be issued can be released by turning off the power of the gas detection alarm 220.
[0006]
The alarm by the wireless signal transmitted from the communication portable terminal 224 is detected by the base station of the mobile communication network 242 and transmitted to the safety center 241 via the telephone network 243. The safety center 241 demodulates the alarm by the digital signal transmitted through the telephone network 243 by the modem 244 and sends it to the computer 245. The computer 245 detects the alarm and turns on the alarm lamp 247 through the interface 246. It turns on the alarm, sounds the alarm buzzer 248, and causes the display device 249 to display information related to the alarm. In the safety center 241, information such as the name of the operator and the construction site of the destination is registered in association with the telephone number of the communication portable terminal 224, and the safety center 241 has been transmitted from the communication portable terminal 224. Based on the telephone number, related information such as the operator's name and destination registered in advance is displayed on the screen of the display device 249. Thus, when an accident such as a gas leak occurs at a construction site where an operator is present, it is possible to take measures such as sending rescue to the construction site displayed on the display device 249 (for example, see Patent Document 1). .
[0007]
[Patent Document 1]
JP-A-2002-92770 (page 3-6, FIG. 3)
[0008]
[Problems to be solved by the invention]
In the conventional danger notification device and the gas abnormality detection system using the same, in order to notify the position information of the operator to the outside, the destination must be registered in advance, which is troublesome. Further, when the operator neglected the destination registration or moved to another destination different from the registered destination, the position where the notification information was issued cannot be specified or the correct position cannot be displayed. In some cases, accurate measures cannot be taken in an emergency such as a gas leak.
[0009]
The present invention has been made in view of the above circumstances, and provides a portable danger notification device and a danger notification server that enable a person outside the place to take appropriate measures in the event of an accident such as a gas leak at an arbitrary place. The purpose is to do.
[0010]
[Means for Solving the Problems]
A portable danger notification device according to the present invention is a portable danger notification device that notifies a danger to a remote place based on a gas concentration in the surroundings, and a position detection unit that detects a current position, and detects the gas concentration. And a transmitting unit for transmitting notification information indicating that the gas concentration has exceeded a threshold value and position information at the time when the gas concentration has exceeded the threshold value to a notification destination for performing the notification.
[0011]
With this configuration, for example, when a worker working at a construction site that handles gas has a portable danger notification device, when the gas concentration at the construction site becomes abnormally high, the notification information and the worker Location information is sent to the notification destination, so that the person receiving this information can understand the situation where the worker is located, and can also locate the worker wherever he is. It can be specified by the position information, and appropriate measures can be taken even in an emergency such as gas leakage.
[0012]
Further, in the portable danger notification device of the present invention, the transmission unit repeatedly transmits the position information detected by the position detection unit to the notification destination when the gas concentration exceeds a threshold.
[0013]
According to this configuration, the person who receives the repeatedly transmitted position information determines that the worker has escaped from the construction site due to the change in the position information, for example, when the position information has changed significantly. If the position information hardly changes, it can be determined that the worker is near the construction site and cannot move, and the safety of the worker can be confirmed.
[0014]
Further, in the portable danger notification device of the present invention, the gas concentration detecting means detects at least one gas concentration among oxygen gas, carbon monoxide gas, hydrogen sulfide gas, nicotine gas, and tar gas.
[0015]
In the portable danger notification device of the present invention, the threshold can be set for each type of gas.
[0016]
Further, in the portable danger notification device of the present invention, the transmission unit transmits the notification information and the position information to the notification destination via a mobile communication network.
[0017]
According to this configuration, the notification information and the position information can be transmitted quickly even if the notification destination is far away.
[0018]
The danger notification server of the present invention is a receiving unit that receives, via a mobile communication network, notification information indicating that a gas concentration at an arbitrary location exceeds a threshold and position information indicating a location at which the gas concentration exceeds the threshold. A specifying means for specifying a mobile terminal existing in the vicinity of a place where the gas concentration exceeds a threshold based on the received position information and the position information of a mobile terminal connectable to the mobile communication network, And transmitting means for transmitting the broadcast information and the position information to the specified mobile terminal.
[0019]
According to this configuration, it is possible to notify the user of the mobile terminal located near the place where the gas concentration exceeds the threshold that the neighborhood is dangerous, and call the user's attention. Therefore, the user can take appropriate measures such as not entering the place.
[0020]
The danger notification server of the present invention is a receiving unit that receives, via a mobile communication network, notification information indicating that a gas concentration at an arbitrary location exceeds a threshold and position information indicating a location at which the gas concentration exceeds the threshold. And a mobile terminal located in a communication area of a wireless base station closest to a place where the gas concentration exceeds a threshold value among a plurality of wireless base stations constituting the mobile communication network based on the received position information. And transmitting means for transmitting the broadcast information and the location information to the specified mobile terminal.
[0021]
According to this configuration, it is possible to notify the user of the mobile terminal located near the place where the gas concentration exceeds the threshold that the neighborhood is dangerous, and call the user's attention. Therefore, the user can take an appropriate countermeasure such as not entering the place, and can suppress damage due to a gas accident or the like.
[0022]
The risk determination method according to the present invention receives the position information repeatedly transmitted from the portable danger notification device, and, based on a change in the received position information, determines a danger of the holder of the portable danger notification device. Is determined.
[0023]
According to this method, for example, when the position information has largely changed, it is determined that the risk is low because the worker has escaped from the construction site, and when the position information has hardly changed, the worker It is possible to judge the degree of danger such that the degree of danger is high because the user is in a situation where he cannot move because he is near the site.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
FIG. 1 is a block configuration diagram of a notification information notification system according to the embodiment of the present invention. The danger notification system 1 includes a portable danger notification device 10, a danger notification device 20 (corresponding to a danger notification server in the claims), and a plurality of mobile information terminal devices 30. Each device communicates via the mobile communication network 60. As the mobile communication network 60, a public network such as a mobile phone network or a PHS network is used. The portable danger notification device 10 is carried by an operator working at a gas construction site. The danger notification device 20 manages the safety of the worker who carries the portable danger notification device 10 and notifies the danger to the portable information terminal device 30.
[0026]
The portable danger notification device 10 includes a gas concentration detection unit 11, a notification information generation unit 12, a position detection unit 13, and a wireless communication unit 14.
[0027]
The gas concentration detection unit 11 detects a gas concentration in the vicinity (around the construction site), and can detect at least one of oxygen gas, carbon monoxide gas, sulfide gas, nicotine gas, tar gas, and the like. . The notification information generator 12 compares the gas concentration detected by the gas concentration detector 11 with a threshold stored in an internal memory, determines whether the gas concentration exceeds the threshold, and determines whether the gas concentration exceeds the threshold. In this case, notification information for notifying that the gas concentration has exceeded the threshold is generated. The notification information generated here includes information such as the type of gas whose gas concentration exceeds the threshold and the gas concentration. The threshold value stored in the internal memory of the notification information generation unit 12 can be set for each type of gas that can be detected by the gas concentration detection unit 11.
[0028]
The position detection unit 13 is configured by, for example, a GPS receiver, detects the current position of the portable danger notification device 10 based on information from GPS satellites, and detects the height direction using an altimeter based on atmospheric pressure. . In addition, the position detection unit 13 includes a geomagnetic sensor and an acceleration sensor so as to be able to cope with a place where information from a GPS satellite cannot be received, such as inside a manhole. The distance traveled is calculated by the acceleration sensor, and the detected position information is complemented by the measured direction and the calculated distance to detect the position information.
[0029]
The wireless communication unit 14 is configured using a mobile phone device (including a PHS) and the like. When the broadcast information is generated by the broadcast information generation unit 12, the broadcast information and the broadcast information at the time when the broadcast information is generated are generated. The position information is repeatedly transmitted to the danger notification device 20.
[0030]
The danger notification device 20 includes a reception unit 21, a storage unit 22, a transmission unit 23, a control unit 24, and an output unit 25. Note that the danger notification device 20 may be installed in the wireless base station 61 included in the mobile communication network 60. Further, the danger notification device 20 may be configured to be connected to the mobile communication network 60 via a fixed network such as an ISDN network or a telephone network.
[0031]
The receiving unit 21 receives the notification information and the position information transmitted from the portable danger notification device 10. The storage unit 22 stores the notification information and the position information received by the reception unit 21 in association with the reception time under the control of the control unit 24.
[0032]
The output unit 25 generates an alarm sound or the like from a speaker or the like based on the notification information and the position information received by the reception unit 21 under the control of the control unit 24, and outputs the notification information and the position information (gas type, gas concentration, Or the location of the construction site) on the display. Thereby, the manager who manages the danger notification device 20 can confirm that an accident such as a gas leak has occurred at the construction site and that the place is dangerous.
[0033]
The output unit 25 displays the name of the worker or the like on the display when the name of the worker or the like holding the portable danger notification device 10 is registered in the storage unit 22 or a database (not shown). It may be. When the name of the work place and the map information are registered in advance in a database (not shown) corresponding to the position information, such information may be displayed on a display.
[0034]
The control unit 24 specifies the portable information terminal device 30 owned by another worker or ordinary person near the construction site indicated by the position information received by the receiving unit 21. As a specific method, when the portable information terminal device 30 has position detecting means such as a GPS receiver, the position information of each of the plurality of portable information terminal devices 30 connectable to the mobile communication network 60 is obtained. The identification is performed based on the acquired position information and the position information of the construction site. For example, the portable information terminal device 30 existing within a predetermined radius from the construction site is specified. Alternatively, based on the position information of the portable danger notification device 10, the wireless base station closest to the construction site is determined by the strength of radio waves from the portable danger notification device 1 reaching the wireless base station, and the wireless base station is determined. The mobile information terminal device 30 existing in the communication area managed by the station is specified.
[0035]
Further, the control unit 24 monitors the position information repeatedly transmitted from the portable danger notification device 10 and sequentially recorded in the storage unit 22, and determines the degree of danger of the worker based on the change in the position information. For example, when the position information hardly changes, it can be estimated that the worker is unable to move from the construction site, so that the risk is determined to be high. Since it can be estimated that they have moved away from the construction site and have escaped, it is determined that the risk is low.
[0036]
The transmission unit 23 transmits the notification information and the position information received by the reception unit 21 to the portable information terminal device 30 specified by the control unit 24.
[0037]
The portable information terminal device 30 includes a wireless communication unit 31 that receives the notification information and the position information transmitted from the danger notification device 20, a display unit 32 that displays information based on the received notification information and the position information, Is provided. As the mobile information terminal device 30, for example, a mobile phone or a PHS phone having a function of receiving character information such as e-mail can be used.
[0038]
FIG. 2 is a flowchart showing the operation of the portable danger notification device according to the embodiment of the present invention.
The portable danger notification device 10 repeats detection of the current position (S11), detection of the surrounding gas concentration (S12), and determination as to whether or not the gas concentration exceeds the threshold. If it is determined that there is (S13: YES), notification information is generated (S14). When the notification information is generated, the notification information and the position information at the time when the notification information is generated are transmitted to the danger notification device 20 (S15).
[0039]
Even after transmitting the notification information in S15, the portable danger notification device 10 repeats detection of the current position (S16), detection of the surrounding gas concentration (S17), and transmission of the notification information and the position information (S18). If the number of repetitions has reached the predetermined number (S19: YES), the process returns to S11 and subsequent steps. On the other hand, if the number of repetitions has not reached the predetermined number (S19: NO), the process returns to S16 and subsequent steps. As described above, the portable danger notification device 10 sets the transmission of the notification information and the position information to a predetermined value even when the gas concentration temporarily exceeds the threshold after the gas concentration temporarily rises and exceeds the threshold. Repeat several times. This enables the danger notification device 20 to determine whether the gas concentration has changed or whether the worker is moving.
[0040]
FIG. 3 is a flowchart illustrating the operation of the danger notification device of the danger notification system according to the embodiment of the present invention.
The danger notification device 20 is normally in a state of waiting for reception of notification information and position information from the portable danger notification device 10 (S21). When the notification information and the position information are received in the reception standby state (S22), the danger notification device 20 stores the notification information and the position information in the storage unit 22 in association with the reception time (S23). Further, the notification information and the position information are transmitted to the portable information terminal device 30 of a person near the construction site (S24). This allows a user near the construction site where the gas concentration is high to be notified of the occurrence of the gas leak and the location of the gas leak.
[0041]
Further, the danger notification device 20 determines the degree of danger of the worker based on the change in the position information sequentially transmitted from the portable danger notification device 10 (S25). When the administrator of the danger notification device 20 confirms the determination result, it is possible to confirm how dangerous the worker is.
[0042]
FIG. 4 is a flowchart showing the operation of the portable information terminal device of the danger notification system according to the embodiment of the present invention.
When the portable information terminal device 30 owned by the user near the construction site receives the notification information and the position information from the danger notification device 20 in the reception standby state (S31), the portable information terminal device 30 transmits the information based on the received notification information and the position information. It is displayed (S33). Thereby, an operator or a general person carrying the portable information terminal device 30 can know that the gas leak has occurred and the place where the gas leak has occurred, and can take an appropriate countermeasure.
[0043]
As described above, according to the present embodiment, when the surrounding gas concentration exceeds the threshold value, the portable danger notification device 1 outputs the notification information for notifying the gas concentration and the position information at that time to the danger notification device. 20, the manager of the danger notification device 20 can confirm from the notification information that an accident such as a gas leak has occurred at a construction site where a worker having the portable danger notification device 1 is present. The location of the construction site can be confirmed. Therefore, no matter where the worker is at the construction site, it is possible to quickly perform an appropriate measure such as specifying the construction site where the worker is located and sending rescue there.
[0044]
Further, according to the present embodiment, the portable danger notification device 1 repeats the transmission of the notification information and the position information after generating the notification information. It is possible to grasp the situation of gas leak at the construction site, and to judge whether or not the worker is moving based on the change of the position information. In the event of an accident, the safety of the worker at the construction site can be confirmed.
[0045]
Further, according to the present embodiment, based on the position information transmitted from the portable danger notification device 1, the danger notification device 20 allows the mobile information terminal device 30 existing near the construction site where the notification information is generated. In addition, since the notification information and the position information are transmitted, it is possible to notify a worker or an ordinary person in the vicinity of the construction site that a gas leak has occurred anywhere. Therefore, a worker or an ordinary person near the construction site can take an appropriate countermeasure such as not approaching near the construction site, thereby preventing the damage caused by a gas accident or the like from increasing.
[0046]
【The invention's effect】
According to the present invention, it is possible to provide a portable danger notification device and a danger notification server that allow a person outside the place to take an appropriate measure in the event of an accident such as a gas leak at an arbitrary place.
[Brief description of the drawings]
FIG. 1 is a block diagram of a danger notification system according to an embodiment of the present invention. FIG. 2 is a flowchart showing an operation of a portable danger notification device of the danger notification system according to an embodiment of the present invention. FIG. 4 is a flowchart showing an operation of the danger notification device of the danger notification system according to the embodiment. FIG. 4 is a flowchart showing an operation of the portable information terminal device of the danger notification system according to the embodiment of the present invention. FIG. 5 is a conventional gas abnormality detection system. Block diagram showing a schematic configuration of the system.
1 Danger notification system 10 Portable danger notification device 11 Gas concentration detection unit 12 Notification information generation unit 13 Position detection unit 14 Wireless communication unit 20 Danger notification device 21 Reception unit 22 Storage unit 23 Transmission unit 24 Control unit 25 Display unit 30 Mobile information Terminal device 31 Wireless communication unit 32 Display unit

Claims (8)

A portable danger notification device that notifies a danger to a remote location based on a surrounding gas concentration,
Position detection means for detecting the current position;
Gas concentration detecting means for detecting the gas concentration,
A portable danger notification device comprising: transmission means for transmitting notification information indicating that the gas concentration has exceeded a threshold value and position information at the time when the gas concentration has exceeded the threshold value to a notification destination for performing the notification. The portable danger notification device according to claim 1,
The portable danger notification device, wherein the transmission unit repeatedly transmits position information detected by the position detection unit to the notification destination from the time when the gas concentration exceeds a threshold. The portable danger notification device according to claim 1 or 2,
The portable danger notification device detects the gas concentration of at least one of oxygen gas, carbon monoxide gas, hydrogen sulfide gas, nicotine gas, and tar gas. The portable danger notification device according to any one of claims 1 to 3,
A portable danger notification device capable of setting the threshold for each type of gas. It is a portable danger alarm device according to any one of claims 1 to 4,
The portable danger notification device that transmits the notification information and the location information to the notification destination via a mobile communication network. Receiving means for receiving, via a mobile communication network, notification information indicating that the gas concentration at an arbitrary location has exceeded a threshold and position information indicating a location at which the gas concentration has exceeded the threshold,
Identifying means for identifying a mobile terminal present in the vicinity of a place where the gas concentration exceeds a threshold, based on the received position information and position information of a mobile terminal connectable to the mobile communication network,
A danger notification server comprising: a transmission unit configured to transmit the notification information and the position information to the specified mobile terminal. Receiving means for receiving, via a mobile communication network, notification information indicating that the gas concentration at an arbitrary location has exceeded a threshold and position information indicating a location at which the gas concentration has exceeded the threshold,
Based on the received position information, a mobile terminal located in a communication area of a wireless base station closest to a place where the gas concentration exceeds a threshold value among a plurality of wireless base stations constituting the mobile communication network is specified. Means for identifying
A danger notification server comprising: a transmission unit configured to transmit the notification information and the position information to the specified mobile terminal. A risk degree that receives position information repeatedly transmitted from the portable danger notification device according to claim 2 and determines a danger degree of a holder of the portable danger notification device based on a change in the received position information. Judgment method.

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