JP2009075823A - Gas leakage detection communication system and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact gas leakage detection communication device with high portability, and a gas leakage detection communication system using the device. <P>SOLUTION: This device includes packing 11a and has a cellphone 13 which can perform radio communications by radio, an alarm part 14 and a communication modem 12 which are connected to the cellphone 13 and notify information, and a power source which drives the cellphone 13, the communication modem 12, and the alarm part 14 inside a closable portable case 11. The device comprises a gas detection part 15 which is communicably connected to the alarm part 14 and measures gas concentration outside the portable case 11. The device consists of a gas leakage detection communication device 10 which notifies abnormalities when the gas detection part 15 detects the gas concentration beyond a predetermined value, and an external terminal 20 to which abnormalities are notified from the gas leakage detection communication device 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technology that provides a customer with peace of mind by appropriately detecting and promptly reporting a gas leak.

The gas pipe buried underground may cause gas leakage due to aging or damage to the buried gas pipe by a construction vehicle when constructing the vicinity of the buried portion.
When a gas leak occurs, it is necessary to take immediate measures, and it is necessary to repair or replace the buried gas pipe that has caused the gas leak.
However, due to the nature of the buried gas pipe being buried, it is difficult to specify the cause of the gas leak. In particular, when there is no single damaged part, there is a risk that gas leakage will continue.

In order to avoid such a problem, several techniques for detecting a gas leak have been proposed. For example, there is a technique disclosed in Patent Document 1.
The technology disclosed in Patent Document 1 is to detect a gas leak by attaching a plurality of monitoring devices to the buried piping around the construction site of the buried piping and detecting the pressure of the buried piping.
The pressure monitoring device is installed in a manhole and includes a reporting computer, a power source, a pressure sensor, and a communication mobile phone terminal.
When it is determined that there is an abnormality by detecting a pressure drop in the piping, it is possible to detect and respond to gas leaks by notifying the person in charge of the site via the wireless telephone network. .

JP 2000-161600 A

However, Patent Document 1 has the following problems.
In the technique of Patent Document 1, it is necessary to attach a monitoring device that detects a gas leak based on a pressure change to a pipe. Therefore, a gas pipe must be exposed in a space such as a manhole, and a pipe that can be fitted with a pressure gauge must be provided near the valve. Construction is required so that it can be detected.
For example, when an attempt is made to attach the monitoring device of Patent Document 1 to a buried gas pipe to be supplied to a home, there is a problem that the surrounding of the gas pipe must be excavated in order to secure a mounting space. There is also.
That is, it can be said that it is difficult to monitor a gas pipe that is not scheduled to be installed in advance, such as a buried gas pipe for supplying city gas to a general household.

  The present invention has been made to solve the above-described problems, and aims to provide a small portable gas leak detection communication device having high portability, and a gas leak detection communication system using the same. .

In order to solve the above problems, the gas leak detection communication system of the present invention has the following configuration.
(1) A wireless communication means capable of wireless communication, a warning output section for notifying information by being connected to the wireless communication means, a wireless communication means and the warning output section, provided with a seal portion and capable of being sealed. A power source for driving, and a gas detector for measuring a gas concentration communicably connected to the alarm output unit outside the case, wherein the gas detector has a gas concentration equal to or higher than a predetermined value. A gas leak detection communication device that notifies an abnormality when detected, and an information management device that is notified of the abnormality by the gas leak detection communication device.

(2) In the gas leak detection communication system according to (1),
The gas leak detection communication device includes a timer, and uses the timer to periodically notify the information management device of the gas concentration detected by the gas detection unit and the detection time when the gas concentration is detected, The information management device stores the detection time notified from the gas leak detection communication device and the gas concentration in a storage unit, and stores the notified gas concentration and the detection time stored in the storage unit. Based on this, the increase in gas concentration is calculated, and the time to reach the lower explosion limit is predicted.

(3) In the gas leak detection communication system described in (1) or (2),
The gas leak detection communication device includes a voltage drop detection unit that measures the voltage of the power source and detects that the voltage of the power source has dropped below a certain level, and the voltage drop detection unit detects the voltage drop of the power source. When detected, the wireless communication means notifies the voltage drop to the outside.

In order to solve the above problems, the gas leak detection communication device of the present invention has the following configuration.
(4) A wireless communication means capable of wireless communication, a warning output section for notifying information by connecting to the wireless communication means, and the communication means and the warning output section are driven in a hermetically sealable case provided with a seal portion. And a gas detection unit that is connected to the alarm output unit so as to be communicable with the alarm output unit, and detects an abnormality when the gas detection unit detects a gas of a predetermined value or more. Information is provided to the outside by the wireless communication means.

(5) In the gas leak detection communication device according to (4),
Voltage drop detection means for measuring the voltage of the power supply and detecting that the voltage of the power supply has dropped below a certain level, and when the voltage drop detection means detects a voltage drop in the power supply, the wireless communication The voltage drop is notified to the outside by means.

The effect of the gas leak detection communication system having the above configuration will be described.
First, the invention described in (1) includes a wireless communication means capable of wireless communication in a sealable case, a warning output section that is connected to the wireless communication means and notifies information, and a wireless communication means. And a power source for driving the alarm output unit, and a gas detection unit for measuring a gas concentration connected to the alarm output unit so as to communicate with the alarm output unit is provided outside the case, and the gas detection unit has a gas concentration equal to or higher than a predetermined value. The gas leak detection communication device that notifies the abnormality when the gas leak is detected, and the information management device that is notified of the abnormality by the gas leak detection communication device, the case can be downsized and the gas leak detection communication device Since no power source is required outside the device, it can be easily installed regardless of the location when it is arranged, and when a gas leak occurs, it can be communicated to the information management device that an abnormality has occurred.

For example, when a gas leak occurs at home, it is preferable to arrange the gas detection unit in a place where gas is most likely to stay. The most serious problem with gas leakage is that the gas supplied on the assumption is a combustible gas such as city gas. However, there is a fact that the combustible gas does not easily cause an explosion unless the concentration exceeds a certain level, and the gas detection unit may be installed in a place where the gas is likely to stay. Therefore, since the case and the gas detection unit are separated, the gas detection unit can be installed in the most suitable place.
The gas leak detection communication device itself is also housed in a hermetically sealable case and does not require an external power supply, so that it can be installed outdoors. For this reason, the degree of freedom of installation can be further increased.

  The place where gas is most likely to stay indoors is the kitchen, but in recent years there are many cases where a gas leak sensor is attached. However, there are few cases other than that. Moreover, if it is on the buried gas piping even outdoors, a place where gas is likely to stay is formed. According to the gas leak detection communication system of the present invention, it is possible to monitor a gas leak by installing a gas leak detection communication device which is excellent in portability even in such a place and does not require an external power source.

The invention described in (2) is the gas leak detection communication system according to (1), wherein the gas leak detection communication device includes a timer, and the gas is periodically detected by the gas detection unit using the timer. The information management device is notified of the detection time at which the concentration and the gas concentration are detected, and the information management device stores the detection time and the gas concentration notified from the gas leak detection communication device, and stores them in the storage device. Since the gas concentration increase is calculated based on the notified gas concentration and the detected time and the time to reach the lower limit of explosion is predicted, the occurrence of abnormality can be predicted and appropriate action can be taken.
Using several gas concentrations and detection times stored in the storage means, it is possible to grasp the increasing tendency of the gas concentration by the least square method or the like and predict the lower explosion limit.

If the gas detection capability of the gas detection unit is capable of detecting a gas concentration sufficiently lower than the lower explosion limit, the predetermined value of the gas concentration is set to, for example, 1/100 to 1/4 of the lower explosion limit, and this range It is possible to detect the gas concentration in the inside and report it as an abnormality. However, when the abnormality is detected at midnight, it is difficult to immediately rush to a general household where the gas leak detection communication device is installed.
Therefore, by grasping the gas leakage concentration and predicting the time when the explosion lower limit is reached, it is possible to take measures in advance even if no abnormality is reported, so that it is possible to give the user more peace of mind.

In the gas leak detection communication system described in (1) or (2), the invention described in (3) measures the voltage of the power source in the gas leak detection communication device, and the power supply voltage is kept below a certain level. When the voltage drop detecting means detects a voltage drop of the power source, the wireless communication means notifies the voltage drop to the outside when the voltage drop detecting means detects the voltage drop. It is possible to prevent the gas leakage from being detected due to a decrease in the gas pressure.
Depending on how the gas leak detection communication device is used, it may be predicted that the life of the power supply will be shorter than the expected life of the power supply or the performance of the power supply may be degraded. Even in such a case, it is possible to avoid a situation where gas leakage cannot be detected.

Moreover, the effect of the gas leak detection communication apparatus which has the said structure is demonstrated.
First, the invention described in (4) is provided with a seal portion, and in a sealable case, a wireless communication means capable of wireless communication, an alarm output portion connected to the wireless communication means to notify information, a communication means, A power source that drives the alarm output unit is built in, and a gas detection unit that is connected to the alarm output unit so as to communicate with the alarm output unit is provided outside the case. Since the fact that this is detected is provided to the outside by wireless communication means, it is possible to respond promptly by, for example, reporting to the management department of the gas company.
This gas leak detection communication device is waterproof like the gas leak detection communication system described in (1), and can be downsized, so it can be installed anywhere. Furthermore, since the gas detection part is separated from the case, the gas can be reliably detected by being easily installed in a place where the gas tends to stay.

  The invention described in (5) includes a voltage drop detection means for measuring the voltage of the power supply and detecting that the voltage of the power supply has dropped below a certain level in the gas leak detection communication device described in (4). When the voltage drop detection means detects the voltage drop of the power supply, the wireless communication means notifies the voltage drop to the outside. Therefore, as with the gas leak detection communication system described in (3), the gas drop is detected by the voltage drop. It becomes possible to prevent the abnormality detected by the detection unit from being notified.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
FIG. 1 is a schematic diagram of a gas leak detection communication device 10 according to the first embodiment.
The gas leak detection communication apparatus 10 includes a portable case 11 including a communication modem 12, a mobile phone 13 as a communication means, and an alarm unit 14, and a gas detection unit 15 provided outside the portable case 11. Yes.
The portable case 11 is a plastic case having a width of about 240 mm, a height of about 100 mm, and a depth of about 120 mm, and has a handle provided outside and can be easily transported. Further, a rubber packing 11a such as NBR sponge is provided on the outer peripheral portion, and a waterproof measure is taken.

The communication modem 12 is connected to the mobile phone 13 and is configured to convert the signal output from the alarm unit 14 into data and to perform packet communication from the mobile phone 13.
The mobile phone 13 is a wireless communication means, and a commercially available mobile phone can be used. In addition, a device that can use a wireless telephone network such as PHS may be used as the wireless communication means.
The gas detection unit 15 is provided outside the portable case 11 and is connected to the alarm unit 14 via the cable 16. The portable case 11 is provided with a hole through which a cable 16 for connecting to the gas detection unit 15 is passed, and a cable 16 for connecting the gas detection unit 15 and the alarm unit 14 via a socket having a waterproof packing is provided. It penetrates. The length of the cable 16 is about 10 m.
The gas detection unit 15 can detect city gas using an element capable of detecting methane gas, and has a capability of detecting a detection lower limit concentration up to about 1/100 of the lower explosion limit concentration of city gas. Shall.

The alarm unit 14 is connected to the gas detection unit 15 and the communication modem 12. The alarm unit 14 incorporates a detection power source 17a (not shown) and supplies power to the gas detection unit 15 as well.
Since the detection power source 17a is a dry battery, it can be easily replaced. Moreover, since the alarm part 14 has little power consumption, it can operate continuously for about one month with the detection power source 17a. The communication modem 12 also has a built-in modem power supply 17b and can be continuously operated for about one month. The mobile phone 13 is also provided with a built-in power supply 17c.
The external terminal 20 may be any mobile terminal as long as it can communicate with the mobile phone 13, but here, it is assumed that the external terminal 20 is a mobile phone carried by a person in charge of the management company.
The external terminal 20 can communicate with the mobile phone 13, and the telephone number of the external terminal 20 is registered in the mobile phone 13, and is transmitted from the mobile phone 13 to the external terminal 20 by the communication modem 12.

1st Embodiment is the said structure and there exists an effect | action and effect which are demonstrated below.
Since the portable case 11 of the gas leak detection communication device 10 includes a communication modem 12, a mobile phone 13, and an alarm unit 14, and the gas detection unit 15 is connected to the outside of the portable case 11 with a cable 16. The gas leak detected by the gas detector 15 can be reported to the outside by the mobile phone 13.
In FIG. 2, the example of a detection flow of the gas leak detection communication apparatus 10 is shown.
In S1, the gas leak detection communication device 10 and the gas detection unit 15 are installed, and the operation of the gas leak detection communication device 10 is started. Then, the process proceeds to S2.
In S2, the gas detection unit 15 investigates the gas concentration around the installation unit. Then, the process proceeds to S3.
In S3, it is determined whether or not the gas concentration detected by the gas detector 15 is equal to or less than a predetermined value. The gas detection unit 15 detects, for example, city gas having a explosion lower limit concentration of 1/100 or more and 1/4 or less. If it is below the predetermined concentration (S3: Yes), the process proceeds to S2. If it is above the predetermined concentration (S3: No), the process proceeds to S4.

In S4, the gas detection unit 15 notifies the alarm unit 14 of a signal. Then, the communication modem 12 connected to the alarm unit 14 makes a call with the mobile phone 13. Then, the process proceeds to S5.
In S5, the gas concentration or higher is reported to the outside. Since it is detected in S3 that the gas detection unit 15 has reached a predetermined value or more, the signal from the gas detection unit 15 recognizes that an abnormality has occurred in the alarm unit 14. Therefore, the external terminal 20 is notified that the gas concentration in the vicinity of the position where the gas detector 15 is installed is high. The communication modem 12 can also send a simple text message such as “Is an emergency call”. Then, the process proceeds to S6.
In S6, it is checked whether the power supply voltages of the detection power supply 17a and the modem power supply 17b are equal to or higher than a predetermined value. If it is equal to or larger than the predetermined value (S6: Yes), the process proceeds to S9. If it is equal to or smaller than the predetermined value (S6: No), the process proceeds to S7.

In S 7, the communication modem 12 calls with the mobile phone 13. Then, the process proceeds to S8.
In S8, the alarm unit 14 notifies the external terminal 20 of the voltage drop of the detection power supply 17a and the modem power supply 17b. Then, the process proceeds to S9.
In S9, it is determined whether the function of the gas leak detection communication device 10 has been stopped. If not stopped (S9: No), the process proceeds to S2. If it is stopped (S9: Yes), the process is terminated.
The communication destination of the mobile phone 13 may be the external terminal 20 belonging to the piping management department of the gas company.
When such a report is made from the mobile phone 13 of the gas leak detection communication device 10 to the external terminal 20, it is desirable that the gas company immediately takes a system of rushing to the vicinity of the destination gas leak detection communication device 10.

As a method of using the gas leak detection communication device 10, the following model case can be considered.
(Model case 1)
FIG. 3 is a schematic diagram illustrating an example when the gas leak detection communication device 10 is installed in a home.
If there is a report from a household using city gas such as “gas smells”, the worker of the gas company will be contacted and immediately rushed to the site to take necessary measures.
If gas leaks are assumed, there may be causes such as aging of pipes or damage to gas pipes when construction is carried out in the vicinity of buried pipes, and there may be one gas leak point. .
It is sufficient if the location can be identified immediately, but it may be difficult to identify the location. Therefore, it is desirable to finally replace the gas piping.

However, in order to replace the gas pipes, it is necessary to excavate underground, and the construction may not be started immediately.
Therefore, after taking a gas leak emergency measure, the gas leak detection communication device 10 is arranged at an important part of the home where the gas leak has occurred, and the gas detector 15 monitors the gas leak. As shown in FIG. 3, the gas detection unit 15 is installed near the ceiling or in a place where gas tends to accumulate, and the portable case 11 of the gas leak detection communication device 10 is placed under the gas leak detection communication. The device 10 can function.
Moreover, since the gas leak detection communication device 10 is waterproof, it can be installed outdoors, and no power source is required to incorporate the detection power source 17a. Moreover, since the portable case 11 is compact, it becomes possible to install the gas leak detection communication device 10 at an appropriate position regardless of the installation location.

In addition, there are many cases where a gas leak monitoring device is installed in the kitchen even indoors, but depending on the gas piping route, there may be a case where it is desired to install a gas leak detection device not only in the kitchen but also in the living room, dining room, or storeroom. Since the gas leak detection communication device 10 is compact and does not require an external power supply, it can be installed at a required location.
Furthermore, since the gas detection unit 15 which is a gas detection unit of the gas leak detection communication device 10 is provided outside the portable case 11 while being connected by a cable, only the gas detection unit 15 can be installed at a high place. It is. In particular, in the case of a gas body that is lighter than air, such as city gas, it is preferable that the gas detector 15 is installed at a high place.
Therefore, since the gas detector 15 can be arranged in a high place or a narrow place, the gas leak can be accurately detected.

(Model case 2)
Considering the case where the gas leak detection communication device 10 is used at a construction site, the gas leak detection communication device 10 is large enough to fit into a color cone or the like. For example, a gas leak near a manhole on a road or near a construction site. It is possible to install the detection communication device 10.
The color cone is often installed for the purpose of prohibiting entry at a construction site, and may be incorporated in one of such color cones.
Thus, if it installs by the method of incorporating in the thing with which a construction site is equipped etc., it is possible to detect a gas leak by the gas detection part 15 without getting in the way.

Thus, since the gas leak detection communication device 10 has a compact configuration and the portable case 11 and the gas detection unit 15 are connected by the cable 16, the gas detection unit 15 is installed in a necessary part. In addition, the portable case 11 can be placed in the vicinity thereof, and the degree of freedom of installation is widened.
The fact that it does not require an external power supply and has a waterproof function also increases the degree of freedom of installation.
Furthermore, since the voltage levels of the detection power supply 17a and the modem power supply 17b are checked, it is possible to avoid a situation in which the gas detection unit 15 does not function or the alarm unit 14 and the communication modem 12 do not function due to a voltage drop. The low battery alarm of the built-in power supply 17c of the mobile phone 13 is also preferably notified if the mobile phone 13 has a function of transmitting a voltage drop as an external output.

In the first embodiment, the communication modem 12, the mobile phone 13, and the alarm unit 14 are individually powered. However, for example, a separate power source is provided in the portable case 11 and used as each main battery or auxiliary battery. It is good also as a structure.
In addition, as a method for confirming a decrease in the output of the built-in power source 17c of the mobile phone 13, there is a means for periodically confirming from the external terminal 20 side. For example, it is also possible to confirm the communication state by calling the mobile phone 13 about every 10 minutes and confirming whether communication is possible.

[Second Embodiment]
In FIG. 4, the schematic diagram of the gas leak detection communication apparatus 10 of 2nd Embodiment and its system is shown. FIG. 5 shows a flow of the gas leak detection communication device 10 of the second embodiment.
The gas leak detection communication device 10 of the second embodiment is almost the same as the gas leak detection communication device 10 of the first embodiment in its configuration. However, the gas leak detection communication device 10 has a timer function, and the information processing terminal 21 is connected to the external terminal 20.
The information processing terminal 21 has a function of recording information from the gas leak detection communication device 10, and can predict the lower explosion limit from the information.

The flow of the gas leak detection communication device 10 will be briefly described as follows.
In S10, the gas leak detection communication device 10 and the gas detection unit 15 are installed, and the operation of the gas leak detection communication device 10 is started. Then, the process proceeds to S11.
In S11, it is checked whether or not a predetermined time has been reached using a timer function. For example, if it is set at intervals of several minutes, it is possible to confirm a trend when a gas leak occurs. If the predetermined time is not reached (S11: No), the process waits until the predetermined time is reached. If the predetermined time is reached (S11: Yes), the process proceeds to S12.
In S12, the gas detection unit 15 investigates the gas concentration around the installation unit. Then, the process proceeds to S13.

In S13, the gas detection unit 15 detects the gas concentration, and the detection time when the gas concentration is detected is stored using the timer function. The storage unit may be provided anywhere, but in the second embodiment, the alarm unit 14 includes a storage unit (not shown). Then, the process proceeds to S14.
In S 14, the signal received from the alarm unit 14 is transmitted to the external terminal 20 using the communication modem 12 and the mobile phone 13. Then, the process proceeds to S15.
In S15, it is checked whether the power supply voltages of the detection power supply 17a and the modem power supply 17b are equal to or higher than a predetermined value. If it is equal to or larger than the predetermined value (S15: Yes), the process proceeds to S16, and if it is equal to or smaller than the predetermined value (S15: No), the process proceeds to S18.

In S <b> 16, the communication modem 12 calls with the mobile phone 13. Then, the process proceeds to S17.
In S17, the alarm unit 14 notifies the external terminal 20 of the voltage drop of the detection power supply 17a and the modem power supply 17b. Then, the process proceeds to S18.
In S18, it is confirmed whether or not the gas leak detection communication device 10 is stopped. If the gas leak detection communication device 10 is not stopped (S18: No), the process proceeds to S11, and if it is stopped (S18: Yes), End the flow.
Thus, the gas concentration and detection time regularly communicated from the gas leak detection communication device 10 are stored in the information processing terminal 21 connected to the external terminal 20, and the information processing terminal 21 is based on the stored data. Investigate the slope of the gas concentration using the least squares method and predict the lower explosion limit.
The predicted lower explosion limit is displayed on the screen of the information processing terminal 21 and notified.

As in the second embodiment, the gas leak detection communication device 10, the external terminal 20, and the information processing terminal 21 can predict the gas leak trend to some extent by predicting the lower explosion limit in advance. For example, if the lower explosive limit is reached in the middle of the night, it is difficult to visit a general home in which the gas leak detection communication device 10 is installed, and it is also difficult to take emergency measures as a visit.
However, it is possible to strengthen the monitoring system according to the predicted time by predicting the time when the lower explosion limit is reached, and if the time comes in the middle of the night, the gas leak detection communication device 10 is installed in advance. It is also possible to visit places.
In addition, since a change such as a sudden increase in gas concentration can be confirmed, the location where the gas leak detection communication device 10 is installed in order to investigate the cause when a sudden increase in gas concentration is confirmed. It is possible to take measures such as confirming whether there are any abnormalities over the telephone.

While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and can be appropriately modified and applied without departing from the scope of the invention.
For example, although the power source is built in each of the communication modem 12, the mobile phone 13, and the alarm unit 14 such as the detection power source 17a and the modem power source 17b, it does not prevent the common power source from being prepared.
In addition, for example, a warning light may be provided in the alarm unit 14 so as to have a function of displaying that the mobile phone 13 cannot communicate when the radio wave condition is deteriorated or the line is congested. .

Moreover, although both 1st Embodiment and 2nd Embodiment are demonstrated so that the gas leak detection communication apparatus 10 may be operated independently, it does not prevent using these two or more and prepares a subunit | mobile_unit and a main | base station A communication system may be used.
In addition, although the gas detection unit 15 and the mobile phone 13 are connected by the cable 16, they may be wireless communication instead of wired communication.

The schematic of the gas leak detection communication apparatus 10 of 1st Embodiment is shown. The example of the detection flow of the gas leak detection communication apparatus 10 of 1st Embodiment is shown. An example in case gas leak detection communication apparatus 10 of a 1st embodiment is installed in the home is shown with a mimetic diagram. The schematic diagram of the gas leak detection communication apparatus 10 and its system of 2nd Embodiment is shown. The flow of the gas leak detection communication apparatus 10 of 2nd Embodiment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gas leak detection communication apparatus 11 Portable case 11a Packing 12 Communication modem 13 Mobile phone 14 Alarm part 15 Gas detection part 16 Cable 17a Detection power supply 17b Modem power supply 20 External terminal 21 Information processing terminal

Claims (5)

With a seal part, in a case that can be sealed,
A wireless communication means capable of wireless communication;
An alarm output unit for notifying information by connecting to the wireless communication means;
A power source for driving the wireless communication means and the alarm output unit;
Built-in,
Outside the case, provided with a gas detection unit for measuring the gas concentration connected to the alarm output unit so as to be communicable,
A gas leak detection communication device for notifying an abnormality when the gas detector detects the gas concentration equal to or higher than a predetermined value;
A gas leak detection communication system comprising: an information management device that is notified of an abnormality from the gas leak detection communication device. The gas leak detection communication system according to claim 1,
The gas leak detection communication device includes a timer, and uses the timer to periodically notify the information management device of the gas concentration detected by the gas detection unit and the detection time when the gas concentration is detected,
The information management device stores in the storage means for storing the detection time and the gas concentration notified from the gas leak detection communication device,
A gas leak detection communication system, wherein a gas concentration increase is calculated based on the notified gas concentration and the detection time stored in the storage means, and a time to reach a lower explosion limit is predicted. In the gas leak detection communication system according to claim 1 or 2,
The gas leak detection communication device comprises a voltage drop detection means for measuring the voltage of the power source and detecting that the voltage of the power source has fallen below a certain level,
A gas leak detection communication system, wherein when the voltage drop detection means detects a voltage drop of the power supply, the wireless communication means notifies the voltage drop to the outside. With a seal part, in a case that can be sealed,
A wireless communication means capable of wireless communication;
An alarm output unit for connecting to a wireless communication means and notifying information;
A power source for driving the communication means and the alarm output unit;
Built-in,
Outside the case, provided with a gas detection unit communicably connected to the alarm output unit,
A gas leak detection communication apparatus, wherein when the gas detection unit detects a gas having a predetermined value or more, the wireless communication means provides information to the outside that an abnormality has been detected. In the gas leak detection communication apparatus according to claim 4,
Voltage drop detection means for measuring the voltage of the power supply and detecting that the voltage of the power supply has dropped below a certain level,
The gas leak detection communication device, wherein when the voltage drop detection means detects a voltage drop of the power supply, the wireless communication means notifies the voltage drop to the outside.

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