CN102377458A - Fire extinguisher pressure detection method and system based on wireless sensing network - Google Patents
Fire extinguisher pressure detection method and system based on wireless sensing network Download PDFInfo
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- CN102377458A CN102377458A CN2010102600172A CN201010260017A CN102377458A CN 102377458 A CN102377458 A CN 102377458A CN 2010102600172 A CN2010102600172 A CN 2010102600172A CN 201010260017 A CN201010260017 A CN 201010260017A CN 102377458 A CN102377458 A CN 102377458A
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Abstract
The invention discloses a fire extinguisher pressure detection method and a fire extinguisher pressure detection system based on a wireless sensing network. The detection method comprises the following steps that: 1a, a pressure meter acquires pressure data of a fire extinguisher and sends the pressure data to a route node through a short-distance wireless transmission network; 1b, the route node forwards the pressure data to a network coordinator through the short-distance wireless transmission network; 2, the network coordinator forwards the pressure data to a center management platform through a remote communication network; and 3, the center management platform receives the pressure data, performs statistic analysis, judges whether to send out alarm information according to an analysis result, if so, sends out the alarm information. The detection system adopts the detection method. By the detection method and the detection system, cost of labors and resources which are required by checking for the fire extinguisher can be reduced greatly, so a user can find abnormity of the fire extinguisher timely, and a manager or a fire supervision department can monitor a state and the quality of each fire extinguisher in real time without going out.
Description
Technical field
The present invention relates to the checkout equipment technical field of fire extinguisher, particularly a kind of fire extinguisher pressure detection method and system based on radio sensing network.
Background technology
The Pressure gauge overwhelming majority of current detection fire extinguisher pressure measures force value through various mechanical systems, and the mode with pointer or hydraulic pressure shows force value again.This traditional Pressure gauge needs manual work to go forward to check one by one when making inspection, has increased the pressure of unit fire-fighting inspection; Simultaneously, (under-voltage condition) can cause fire extinguisher to lose efficacy if in time do not find when the fire extinguisher insufficient pressure; When breaking out of fire, do not have the effect of controlling the intensity of a fire, putting out the condition of a fire, result in greater loss; More serious is; Expired fire extinguisher itself is exactly a great hidden, and under specific circumstances, expired fire extinguisher self exists the risk of blast.Along with national economy and society constantly develop, various newly-built mansions, dwelling house, school, factory building have all assembled increasing fire extinguisher, and the difficulty of hand inspection and cost are also increasingly high.Therefore, how in time to detect the pressure data that is assemblied in fire extinguisher everywhere and just become problem demanding prompt solution.
Summary of the invention
Technical problem to be solved by this invention is: a kind of fire extinguisher pressure detection method and system based on radio sensing network is provided, and it can reduce the manpower and materials cost that the inspection fire extinguisher needs greatly, notes abnormalities and can in time report to the police.
For solving technical problem of the present invention, the present invention discloses a kind of fire extinguisher pressure detection method based on radio sensing network, comprises step:
S1a, said Pressure gauge are gathered the pressure data of fire extinguisher, send said pressure data through short distance wireless communication network to routing node;
S1b, said routing node are transmitted to said network coordinator with said pressure data through short distance wireless communication network;
S2, said network coordinator are transmitted said pressure data through telecommunications network and are given the central management platform;
S3, said central management platform receive said pressure data, carry out statistical analysis, judge whether to send a warning according to analysis result, if then send a warning.
For solving technical problem of the present invention; The present invention also discloses a kind of fire extinguisher pressure detecting system based on radio sensing network; The routing node that comprises Pressure gauge, is connected through Small Area Wireless Communication Networks with said Pressure gauge; The network coordinator that is connected through Small Area Wireless Communication Networks with said routing node, the central management platform that is connected through telecommunications network with network coordinator;
Said Pressure gauge is used for the pressure data of fire extinguisher is uploaded to routing node through said Small Area Wireless Communication Networks;
Routing node is used for said pressure data and the request of networking are transmitted to said network coordinator through short distance wireless communication network;
Said network coordinator is used for converting said pressure data to the telecommunication network transmits data packets, sends to said central management platform through telecommunications network;
Said central management platform is used to receive said pressure data, carries out statistical analysis, judges whether to send a warning according to analysis result, if then send a warning.
Compared with prior art; The present invention has following beneficial effect: fire extinguisher pressure detection method of the present invention can be after obtaining the pressure data of fire extinguisher be uploaded to the central management platform of front end through cordless communication network and equipment; Reduce the manpower and materials cost that the inspection fire extinguisher needs greatly; Note abnormalities and in time to report to the police, make administrative staff or fire supervision department home-confined, just can monitor the state and the quality of each fire extinguisher in real time.
Description of drawings
Fig. 1 is the Pressure gauge circuit structure diagram of the embodiment of the invention;
Fig. 2 is the Pressure gauge mechanical construction drawing of the embodiment of the invention;
Fig. 3 is the detection system structure chart of the embodiment of the invention;
Fig. 4 is the Pressure gauge networking request flow chart of the embodiment of the invention;
Fig. 5 is the Pressure gauge roll-call flow chart of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is done further explain.
As shown in Figure 1, be the Pressure gauge circuit structure diagram of present embodiment.
The Pressure gauge that present embodiment provides based on radio sensing network; Comprise processor, the pressure sensor, memory, display module and the wireless transport module that electrically connect power management module and electrically connect with processor with processor, power management module;
Said power management module is used for working power to processor, pressure sensor, memory, display module and wireless transport module being provided;
Said processor is used for controlled pressure transducer, memory, display module and wireless transport module work, and the pressure data that the dissection process pressure sensor is gathered re-sends to display module and shows with wireless transport module and upload;
Said pressure sensor is used to gather the pressure data of fire extinguisher, outputs to processor;
The pressure data that said memory is used to receive and storage of processor is sent;
Said display module is used for that the pressure data that processor sends is processed into relevant numerical information and shows;
Said wireless transport module is used for the pressure data that processor sends is processed into the transmission data upload that meets short range wireless transmission communication protocol, and receives the instruction from telegon or central server.
In the present embodiment, said display module comprises a LCD display, shows the numerical information of said pressure data through the mode of number.In addition, understand the pressure condition of fire extinguisher for further making the user, the display module of present embodiment also comprises LED lamp indicating device, is used for sending under-voltage pilot light (for example sending red light) according to the under-voltage signal that processor sends; The overvoltage information of sending according to processor number is sent overvoltage pilot light (for example sending yellow light); And the normal state signal that sends according to processor sends normal pilot light (for example sending green).
Said processor also is used for the pressure data according to said processing pressure sensor acquisition, judges that fire extinguisher is in normal condition, under-voltage condition or overvoltage condition, sends normal state signal, under-voltage signal or overvoltage signal.
As shown in Figure 2, be the Pressure gauge mechanical construction drawing of present embodiment.The LCD display 31 of display module and LED lamp indicating device 32 are positioned at the top of the PCB circuit board 10 that processor, power management module, memory module, wireless transport module form, and pressure sensing module 20 is positioned at the below of said PCB circuit board 10.When user mode, said pressure sensing module 20 links to each other with fire extinguisher, detects the pressure in the fire extinguisher with the form of numeral, and transmits back processor with modes such as IIC, RS232 serial ports.
In the present embodiment, memory module can comprise memories such as internal memory and FLASH flash memory, except the pressure data of storage fire extinguisher, also stores various routine datas.
In addition, the wireless transport module of present embodiment is uploaded pressure data at regular intervals one time, and not only is used to upload said pressure data, also is used for the various data that receiving front-end network router or telegon send.Concrete wireless transport module can be used the ZigBee wireless communication module, or other short squares realize that from wireless communication module ZigBee is a kind of short-distance wireless networking mechanics of communication of low-power consumption.
Present embodiment also provides a kind of intelligent extinguisher; Comprise fire extinguisher body and the Pressure gauge that is connected the fire extinguisher body; The Pressure gauge that said Pressure gauge is above-mentioned based on radio sensing network; Be used to gather in the pressure data of fire extinguisher body, and upload said pressure data through Small Area Wireless Communication Networks.
Be that the above-mentioned Pressure gauge based on radio sensing network can be connected with common fire extinguisher, but form active detecting and upload the intelligent extinguisher of pressure data.
As shown in Figure 3; Fire extinguisher pressure detecting system for present embodiment based on radio sensing network; The routing node that comprises aforesaid Pressure gauge, is connected through Small Area Wireless Communication Networks with said Pressure gauge; The network coordinator that is connected through Small Area Wireless Communication Networks with said routing node, the central management platform that is connected through telecommunications network with network coordinator;
Said Pressure gauge is used for the pressure data of fire extinguisher is uploaded to routing node through said Small Area Wireless Communication Networks;
Routing node is used for said pressure data and the request of networking are transmitted to contiguous routing node or said network coordinator through short distance wireless communication network; Contiguous routing node is forwarded to said network coordinator again;
Said network coordinator is used for converting said pressure data to the telecommunication network transmits data packets, sends to said central management platform through telecommunications network;
Said central management platform is used to receive said pressure data, carries out statistical analysis, judges whether to send a warning according to analysis result, if then send a warning.
Statistical analysis judges whether to send a warning according to analysis result, if then send a warning.
In the present embodiment, said Pressure gauge also is used for sending the request of networking through short distance wireless communication network to said routing node, is forwarded to corresponding network coordinator again; Said network coordinator also is used to judge whether allow to network, if then said Pressure gauge is added network, and send said manometric networking information through telecommunications network to said central management platform; If not, then return the failure order that networks and give routing node, be forwarded to corresponding Pressure gauge again; Said central management platform also is used for receiving and preserving said manometric networking information.Make the central management platform can in time handle the Pressure gauge of new networking.
Be the function that realizes that above-mentioned transmission networks and asks, the manometric processor of present embodiment also is used for generating the request of networking; Said wireless transport module also is used for said networking request is uploaded to routing node, if network failure, also is used to receive the networking failure order that said routing node returns.
In addition; For making the central management platform more in time obtain the pressure data that Pressure gauge detected of a certain appointment; Said central management platform also is used for sending the roll-call of specifying certain Pressure gauge to upload pressure data through telecommunications network to said network coordinator orders, and promptly the central management platform irregularly sends order to Pressure gauge; Said network coordinator also is used for transmitting said roll-call through short distance wireless communication network orders to routing node, is forwarded to the Pressure gauge of appointment again.Pressure gauge sends the pressure data that detects to the central management platform after receiving the order of calling the roll.
For realizing above-mentioned roll-call order, the manometric wireless transport module of present embodiment also is used to receive the roll-call order that said routing node is transmitted; Said processor also is used for according to the said pressure sensor work of said roll-call order control, and the pressure data that the dissection process pressure sensor is gathered re-sends to display module and shows with wireless transport module and upload.
Each Pressure gauge of present embodiment is assemblied on the fire extinguisher that is installed in each fire protection equipment of floor, can form intelligent extinguisher with each fire extinguisher.The network coordinator of present embodiment is installed in certain position of floor.Can the installation number of network coordinator and routing node be set according to the environmental factors such as area of floor.
In the present embodiment, said Small Area Wireless Communication Networks is the ZigBee cordless communication network, or other short squares are from cordless communication network; Said telecommunications network is GPRS (General Packet Radio Service; The general packet radio service technology), CDMA (Code Division Multiple Access; Code division multiple access), TDS-CDMA (Time Division-Synchronous Code Division Multiple Access; The CDMA that time-division is synchronous), CDMA2000, WCDMA (Wideband Code Division Multiple Access; WCDMA), WiMax (Worldwide Interoperability for Microwave Access; The worldwide interoperability for microwave access), WIFI (Wireless Fidelity; WiMAX), WAPI (Wireless LAN Authentication and Privacy Infrastructure, WLAN authentication and privacy infrastructure) cordless communication network a kind of, or LAN (local area network; Local area network (LAN)), wireline communication networks such as ADSL (Asymmetric Digital Subscriber Line, ADSL), optical fiber, special line.
In addition, the central management platform of present embodiment if the pressure data of finding fire extinguisher not within normal scope the time, then can judge and need send a warning.Particularly, the central management platform can through the SMS server send comprise warning information short message to the mobile phone of user binding, perhaps through E-mail service affair device send comprise warning information Email in the E-mail address of user's appointment.
Correspondingly, present embodiment also provides the fire extinguisher pressure detection method based on radio sensing network that can be used for above-mentioned detection, comprises step:
S1a, said Pressure gauge are gathered the pressure data of fire extinguisher, send said pressure data through short distance wireless communication network to routing node;
S1b, said routing node are transmitted to said contiguous routing node or network coordinator with said pressure data through short distance wireless communication network; Contiguous routing node is forwarded to said network coordinator again;
S2, said network coordinator are transmitted said pressure data through telecommunications network and are given the central management platform;
S3, said central management platform receive said pressure data, carry out statistical analysis, judge whether to send a warning according to analysis result, if then send a warning.
As shown in Figure 4, can in time handle the Pressure gauge of new networking for making the central management platform, further comprising the steps of before said step S1:
S0a, said Pressure gauge send the request of networking through short distance wireless communication network to routing node;
S0b, said routing node are transmitted to said network coordinator with said networking request through short distance wireless communication network;
S0c, said network coordinator judge whether to allow to network, if then said Pressure gauge is added network, and send said manometric networking information through telecommunications network to said central management platform; If not, then return the failure order that networks and give said routing node;
S0d, said routing node are transmitted said networking failure order and are given said Pressure gauge;
S0e, said central management platform receive and preserve said manometric networking information.
As shown in Figure 5, more in time obtain the pressure data that Pressure gauge detected of a certain appointment for making the central management platform, after said step S0e, further comprising the steps of before the S1a:
S4a, said central management platform send to said network coordinator through telecommunications network specifies certain Pressure gauge to upload the roll-call order of pressure data;
S4b, said network coordinator are transmitted said roll-call through short distance wireless communication network and are ordered to routing node;
S4c, said routing node are transmitted said roll-call orders the Pressure gauge to appointment.
In the present embodiment, the every roll-call of central management platform finishes a Pressure gauge, just judges whether to accomplish all manometric roll-calls, if do not accomplish, just continues to get into step S4a; Otherwise, store the pressure data that all Pressure gauges are uploaded, to the user feedback result.
In sum, the present invention has carried out bigger improvement to prior art, and has obtained following beneficial effect:
1, reformed the method for fire extinguisher inspection, greatly reduced the manpower of the needs of inspection fire extinguisher, the help of grid has been arranged, people can more effective ground monitors the fire extinguisher situation of building, Building tens, a hundreds of unit simultaneously.
2, improve the accuracy and the precision of inspection greatly, be not easy under-enumeration to occur, mistake is looked into, pressure value can accurately be noted, and has also stopped subreptitious possibility simultaneously.
3, frequency that can free setting pressure inspection/feedback pressure, even can a Pressure gauge inspection of manual starting.
Situation such as 4, under-voltage, the overvoltage of fire extinguisher pressure, fault are alarmed automatically, in time notify the related personnel, prevent when the condition of a fire occurring, just to find the situation that fire extinguisher is have more than is needed, reduce possible personnel's property loss greatly.
5, under-voltage soon, the fast expired information of fire extinguisher comes into plain view, and need not check one by one that the unit's of arranging properly fire extinguisher is changed the plan of buying in advance.
More than lift preferred embodiment, the object of the invention, technical scheme and advantage have been carried out further explain, institute is understood that; The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc.; All should be included within protection scope of the present invention, the interest field that the present invention advocated should application range is said to be as the criterion to invent, but not only limits to the foregoing description.
Claims (10)
1. the fire extinguisher pressure detection method based on radio sensing network is characterized in that, comprises step:
S1a, Pressure gauge are gathered the pressure data of fire extinguisher, send said pressure data through short distance wireless communication network to routing node;
S1b, routing node are transmitted to network coordinator with said pressure data through short distance wireless communication network;
S2, network coordinator are transmitted said pressure data through telecommunications network and are given the central management platform;
S3, central management platform receive said pressure data, carry out statistical analysis, judge whether to send a warning according to analysis result, if then send a warning.
2. the fire extinguisher pressure detection method based on radio sensing network as claimed in claim 1 is characterized in that, and is further comprising the steps of before said step S1a:
S0a, said Pressure gauge send the request of networking through short distance wireless communication network to routing node;
S0b, said routing node are transmitted to said network coordinator with said networking request through short distance wireless communication network;
S0c, said network coordinator judge whether to allow to network, if, then said Pressure gauge is added network, and send said manometric networking information to said central management platform through telecommunications network, get into step S0e; If not, then return the failure order that networks and give said routing node, get into step S0d;
S0d, said routing node are transmitted said networking failure order and are given said Pressure gauge;
S0e, said central management platform receive and preserve said manometric networking information.
3. the fire extinguisher pressure detection method based on radio sensing network as claimed in claim 2 is characterized in that, and is after said step S0e, further comprising the steps of before the S1a:
S4a, said central management platform send to said network coordinator through telecommunications network specifies certain Pressure gauge to upload the roll-call order of pressure data;
S4b, said network coordinator are transmitted said roll-call through short distance wireless communication network and are ordered to routing node;
S4c, said routing node are transmitted said roll-call orders the Pressure gauge to appointment.
4. like each described fire extinguisher pressure detection method of claim 1 to 3, it is characterized in that said Small Area Wireless Communication Networks is ZigBee or Wifi network based on radio sensing network; Said telecommunications network is a kind of of GPRS, CDMA, TDS-CDMA, CDMA2000, WCDMA, WiMax, WIFI, WAPI cordless communication network, or LAN, ADSL, optical fiber, special line wireline communication network is a kind of.
5. fire extinguisher pressure detecting system based on radio sensing network; It is characterized in that; The routing node that comprises Pressure gauge, is connected through Small Area Wireless Communication Networks with said Pressure gauge; The network coordinator that is connected through Small Area Wireless Communication Networks with said routing node, the central management platform that is connected through telecommunications network with network coordinator;
Said Pressure gauge is used for the pressure data of fire extinguisher is uploaded to routing node through said Small Area Wireless Communication Networks;
Routing node is used for said pressure data and the request of networking are transmitted to other routing nodes through short distance wireless communication network, or said network coordinator;
Said network coordinator is used for converting said pressure data to the telecommunication network transmits data packets, sends to said central management platform through telecommunications network;
Said central management platform is used to receive said pressure data, carries out statistical analysis, judges whether to send a warning according to analysis result, if then send a warning.
6. the fire extinguisher pressure detecting system based on radio sensing network as claimed in claim 5 is characterized in that, said Pressure gauge also is used for sending the request of networking through short distance wireless communication network to said routing node;
Said routing node is transmitted said networking and is asked adjacent routing node or said network coordinator;
Said network coordinator also is used to judge whether allow to network, if then said Pressure gauge is added network, and send said manometric networking information through telecommunications network to said central management platform; If not, then return the failure order that networks and give said routing node;
If network failure, said routing node is transmitted said networking failure order to said Pressure gauge;
If network successfully, said central management platform also is used for receiving and preserving said manometric networking information.
7. the fire extinguisher pressure detecting system based on radio sensing network as claimed in claim 6; It is characterized in that said central management platform also is used for sending the roll-call of specifying certain Pressure gauge to upload pressure data through telecommunications network to said network coordinator orders;
Said network coordinator also is used for transmitting said roll-call through short distance wireless communication network orders to routing node;
Said network circuit node is used to transmit said roll-call orders the Pressure gauge to appointment.
8. like each described fire extinguisher pressure detecting system of claim 5 to 7 based on radio sensing network; It is characterized in that; Said Pressure gauge comprises processor, with the power management module of processor electric connection and pressure sensor, memory, display module and the wireless transport module that electrically connects with processor, power management module;
Said power management module is used for working power to processor, pressure sensor, memory, display module and wireless transport module being provided;
Said processor is used for controlled pressure transducer, memory, display module and wireless transport module work, and the pressure data that the dissection process pressure sensor is gathered re-sends to display module and shows with wireless transport module and upload;
Said pressure sensor is used to gather the pressure data of fire extinguisher, outputs to processor;
The pressure data that said memory is used to receive and storage of processor is sent;
Said display module is used for that the pressure data that processor sends is processed into relevant numerical information and shows;
Said wireless transport module is used for the pressure data that processor sends is processed into the transmission data upload that meets short range wireless transmission communication protocol.
9. the fire extinguisher pressure detecting system based on radio sensing network as claimed in claim 8 is characterized in that said display module comprises LCD display, is used to show the numerical information of said pressure data.
10. the fire extinguisher pressure detecting system based on radio sensing network as claimed in claim 8 is characterized in that said display module also comprises LED lamp indicating device, is used for sending under-voltage pilot light according to the under-voltage signal that processor sends; And the overvoltage information of sending according to processor number is sent the overvoltage pilot light; And send the said processor of normal pilot light according to the normal state signal that processor sends and also be used for pressure data according to said processing pressure sensor acquisition; Judge that fire extinguisher is in normal condition, under-voltage condition or overvoltage condition, send normal state signal, under-voltage signal or overvoltage signal.
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| CN107422670A (en) * | 2017-07-21 | 2017-12-01 | 深圳市盛路物联通讯技术有限公司 | Intelligent extinguisher test control method and equipment |
| CN108785949A (en) * | 2017-04-27 | 2018-11-13 | 南京消防器材股份有限公司 | A kind of wireless fire-fighting instrument system |
| CN109173132A (en) * | 2018-09-25 | 2019-01-11 | 深圳市国电投资有限公司 | A kind of fire extinguisher based on Internet of Things wireless telecommunications |
| CN109395302A (en) * | 2018-12-19 | 2019-03-01 | 武汉创驰蓝天信息科技有限公司 | A kind of intelligent extinguisher management system |
| CN109568843A (en) * | 2019-01-06 | 2019-04-05 | 深圳泰科芯元科技有限公司 | A kind of Internet of Things intelligent extinguisher of band fire prevention warning function |
| CN110732109A (en) * | 2019-09-24 | 2020-01-31 | 九江中船消防设备有限公司 | automatic monitoring devices of marine fire control steel bottle pressure that puts out a fire |
| WO2020031037A1 (en) * | 2018-08-06 | 2020-02-13 | Lehavot Production & Protection (1995) Ltd. | Retrofit fire extinguisher apparatus |
| CN111163843A (en) * | 2017-07-18 | 2020-05-15 | 彼得·卡玛 | Method and device for remote monitoring of fire extinguishing devices or systems |
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| CN111163843A (en) * | 2017-07-18 | 2020-05-15 | 彼得·卡玛 | Method and device for remote monitoring of fire extinguishing devices or systems |
| CN107422670B (en) * | 2017-07-21 | 2020-04-14 | 深圳市盛路物联通讯技术有限公司 | Intelligent fire extinguisher test control method and equipment |
| CN107422670A (en) * | 2017-07-21 | 2017-12-01 | 深圳市盛路物联通讯技术有限公司 | Intelligent extinguisher test control method and equipment |
| US11938360B2 (en) | 2018-08-06 | 2024-03-26 | Lehavot Production & Protection (1995) Ltd. | Retrofit fire extinguisher apparatus |
| WO2020031037A1 (en) * | 2018-08-06 | 2020-02-13 | Lehavot Production & Protection (1995) Ltd. | Retrofit fire extinguisher apparatus |
| CN109173132A (en) * | 2018-09-25 | 2019-01-11 | 深圳市国电投资有限公司 | A kind of fire extinguisher based on Internet of Things wireless telecommunications |
| CN109395302A (en) * | 2018-12-19 | 2019-03-01 | 武汉创驰蓝天信息科技有限公司 | A kind of intelligent extinguisher management system |
| CN109568843A (en) * | 2019-01-06 | 2019-04-05 | 深圳泰科芯元科技有限公司 | A kind of Internet of Things intelligent extinguisher of band fire prevention warning function |
| CN114041278A (en) * | 2019-07-04 | 2022-02-11 | 泰坦消防系统有限责任公司 | Pressure gauge |
| CN110732109A (en) * | 2019-09-24 | 2020-01-31 | 九江中船消防设备有限公司 | automatic monitoring devices of marine fire control steel bottle pressure that puts out a fire |
| CN111870839A (en) * | 2020-08-26 | 2020-11-03 | 苏州安众道智能科技有限公司 | Intelligent vehicle-mounted fire extinguisher management system based on Internet of things |
| CN111870839B (en) * | 2020-08-26 | 2022-05-24 | 苏州安众道智能科技有限公司 | Intelligent vehicle-mounted fire extinguisher management system based on Internet of things |
| CN112843541A (en) * | 2021-01-08 | 2021-05-28 | 国网福建省电力有限公司沙县供电公司 | Fire extinguisher remote real-time monitoring system in transformer substation |
| CN114870314A (en) * | 2022-05-06 | 2022-08-09 | 浙江悟连科技有限公司 | Fire extinguisher pressure gauge, fire extinguisher management system and fire extinguisher management method |
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Application publication date: 20120314 |