CN108898780A - A kind of smoke detector based on wireless network - Google Patents
A kind of smoke detector based on wireless network Download PDFInfo
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- CN108898780A CN108898780A CN201810768785.5A CN201810768785A CN108898780A CN 108898780 A CN108898780 A CN 108898780A CN 201810768785 A CN201810768785 A CN 201810768785A CN 108898780 A CN108898780 A CN 108898780A
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- 239000000779 smoke Substances 0.000 title claims abstract description 49
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 239000000523 sample Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000004254 Ammonium phosphate Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims description 3
- 235000019289 ammonium phosphates Nutrition 0.000 claims description 3
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 229940071182 stannate Drugs 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 3
- 150000002500 ions Chemical class 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002463 transducing effect Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910052695 Americium Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- LXQXZNRPTYVCNG-UHFFFAOYSA-N americium atom Chemical compound [Am] LXQXZNRPTYVCNG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
- G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fire Alarms (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a kind of smoke detectors based on wireless network, including flameproof case body, flameproof case body upper surface is equipped with mounting hole, flameproof case body two sides are respectively equipped with alarming horn, flameproof case body bottom is equipped with multiple smoke detectors and 360 ° of monitoring probes, flameproof case body front end face is equipped with alarm lamp, flameproof case intracoelomic cavity is equipped with master control borad, structure of the invention principle is simple, it being capable of accurately detecting smoke signal, smoke signal and warning message can be sent to monitor terminal simultaneously at the first time, realize interlink warning, timeliness is strong.
Description
Technical field
The present invention relates to smoke detection technical field, specially a kind of smoke detector based on wireless network.
Background technique
Smoke detector is also referred to as smoke fire detector, smoke alarm, smoke detector, Smoke Detector and cigarette
Propagated sensation sensor, is mainly used in fire-fighting system, also has application in security system construction.It is one kind typically by space fire-fighting
Measure switchs to civilian equipment.Smoke detector is mainly to realize that fire disasters protection, smog are visited by monitoring the concentration of smog
It surveys inside device and is sensed using ion type smog, ion type smog sensor is a kind of technologically advanced, stable and reliable in work sensing
Device is widely used in various fire protection alarm systems, and performance is much better than the fire-alarm of gas sensing resistance class.Smoke detector
Fire disasters protection is mainly realized by monitoring the concentration of smog, is sensed inside smoke detector using ion type smog, from
Minor smoke sensor device is a kind of technologically advanced, stable and reliable in work sensor, is widely used various fire protection warning systems
In system, performance is much better than the fire-alarm of gas sensing resistance class；There is radioactive source americium in outer ionisation chamber the inside to smoke detector inside
241, the positive and negative ion of generation is ionized, it is respectively mobile to positive and negative electrode under the action of electric field.Under normal conditions, inside and outside
Electric current, the voltage of ionisation chamber are all stable.Once there is smog to flee in disorder outer ionisation chamber.The proper motion of charged particle is disturbed,
Electric current, voltage will change, and destroy the balance between inside and outside ionisation chamber, and then wireless transmitter issues radio alarming letter
Number, it notifies the receiving host in a distant place, warning message is passed.
Currently, indoor smoke detector has a single function, and flame retardant effect is poor, therefore, is further improved.
Summary of the invention
The purpose of the present invention is to provide a kind of smoke detectors based on wireless network, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the present invention provides the following technical solutions：A kind of smoke detector based on wireless network,
Including flameproof case body, flameproof case body upper surface is equipped with mounting hole, and flameproof case body two sides are respectively equipped with alarm
Loudspeaker, flameproof case body bottom are equipped with multiple smoke detectors and 360 ° of monitoring probes, the flameproof case body front end face
Equipped with alarm lamp, the flameproof case intracoelomic cavity is equipped with master control borad；The master control borad is equipped with central processing unit, wireless network
Pass, memory, image capture module and the Internet module, the smoke detector connect central processing unit by radio network gateway,
The memory, alarming horn and alarm lamp are separately connected central processing unit, and 360 ° of monitoring probes are adopted by image
Collect module and connect central processing unit, the central processing unit is separately connected background monitoring center by the Internet module and owner is whole
End.
Preferably, the radio network gateway includes WIFI transceiver module, data processing module, 300-500MHz radio-frequency receiving-transmitting mould
Block and power module, the data processing module are separately connected WIFI transceiver module, 300-500MHz RF receiving and transmission module and electricity
Source module.
Preferably, the central processing unit uses the single-chip microcontroller of model N76E003.
Preferably, the flameproof case body component include in parts by weight 10-20 parts of carbon fiber, 20-30 parts of EVA resin,
6-12 parts of aluminium hydroxide, 3-9 parts of magnesium hydroxide, 3-6 parts of nylon particles, 1-3 parts of zinc hydroxyl stannate, 3-6 parts of ammonium phosphate, montmorillonite
5-12 parts, 2-8 parts of antimony oxide.
Preferably, application method includes the following steps：
A, smoke detector acquires indoor smoke signal in real time, once detecting smoke signal, triggers 360 ° of prisons immediately
Control probe work, acquires the picture signal of surrounding；
B, the picture signal of acquisition and smoke signal, which are transmitted in memory, saves, meanwhile, central processing unit sends alarm
Instruction, alarming horn issue alarm voice；
C, the alarm signal and picture signal of acquisition are sent to background monitoring center and owner's terminal by internet in real time,
Convenient for handling in time.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) structure of the invention principle is simple, can accurately detecting smoke signal, while can be by smoke signal and alarm signal
Breath is sent to monitor terminal at the first time, realizes interlink warning, and timeliness is strong.
(2) the radio network gateway strong antijamming capability that the present invention uses, improves the efficiency of transmission of transducing signal.
(3) the flameproof case body that the present invention uses has good fire-retardant, heat insulation, will not burn out internal component,
Convenient for acquiring the extraction of data.
Detailed description of the invention
Fig. 1 is overall structure of the present invention；
Fig. 2 is control principle block diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2,：A kind of smoke detector based on wireless network, packet
Flameproof case body 1 is included, 1 upper surface of flameproof case body is equipped with mounting hole 2, and 1 two sides of flameproof case body are respectively equipped with report
Alert loudspeaker 3,1 bottom of flameproof case body are equipped with multiple smoke detector 4 and 360 ° monitoring probes 5, the flameproof case body 1
Front end face is equipped with alarm lamp 6, and 1 inner cavity of flameproof case body is equipped with master control borad 7；The master control borad 7 is equipped with centre
Device 8, radio network gateway 9, memory 10, image capture module 11 and the Internet module 12 are managed, the smoke detector 4 passes through wireless
Gateway 9 connects central processing unit 8, and the memory 10, alarming horn 3 and alarm lamp 6 are separately connected central processing unit 8,
360 ° of monitoring probes 5 pass through internet by 11 pieces of connection central processing units 8 of Image Acquisition mould, the central processing unit 8
Module 12 is separately connected background monitoring center 13 and owner's terminal 14；Wherein, central processing unit 8 is using model N76E003's
Single-chip microcontroller.N76E003 may operate at two kinds of low-power consumption mode-idle modes and power-down mode, can select to operate in by software
Which kind of mode.When idle mode, chip master clock is closed, but partial function module is still run.Chip is whole under power-down mode
Clock closing ensures that chip power-consumption reaches minimum.In the normal mode of operation, master clock frequency elimination mode also may be selected to work, it is ensured that
It is flexibly used between power consumption and performance.Functional module high-effect, abundant and configuration, N76E003 can flexibly be used for various answer
Use occasion.
In the present invention, radio network gateway 9 includes WIFI transceiver module 15, data processing module 16,300-500MHz radio frequency receipts
Hair module 17 and power module 18, the data processing module 16 are separately connected WIFI transceiver module 15,300-500MHz radio frequency
Transceiver module 17 and power module 18.The radio network gateway strong antijamming capability that the present invention uses, improves the transmission of transducing signal
Efficiency.
In the present invention, 1 component of flameproof case body includes 10-20 parts of carbon fiber, 20-30 parts of EVA resin, hydrogen in parts by weight
6-12 parts of aluminium oxide, 3-9 parts of magnesium hydroxide, 3-6 parts of nylon particles, 1-3 parts of zinc hydroxyl stannate, 3-6 parts of ammonium phosphate, montmorillonite 5-
12 parts, 2-8 parts of antimony oxide.The flameproof case body that the present invention uses has good fire-retardant, heat insulation, will not burn out interior
Portion's component, convenient for acquiring the extraction of data.
Working principle：Application method of the invention includes the following steps：
A, smoke detector acquires indoor smoke signal in real time, once detecting smoke signal, triggers 360 ° of prisons immediately
Control probe work, acquires the picture signal of surrounding；
B, the picture signal of acquisition and smoke signal, which are transmitted in memory, saves, meanwhile, central processing unit sends alarm
Instruction, alarming horn issue alarm voice；
C, the alarm signal and picture signal of acquisition are sent to background monitoring center and owner's terminal by internet in real time,
Convenient for handling in time.
In conclusion structure of the invention principle is simple, can accurately detecting smoke signal, while can by smoke signal and
Warning message is sent to monitor terminal at the first time, realizes interlink warning, and timeliness is strong.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of smoke detector based on wireless network, including flameproof case body (1), it is characterised in that：Outside the fire prevention
Shell (1) upper surface is equipped with mounting hole (2), and flameproof case body (1) two sides are respectively equipped with alarming horn (3), the fire prevention
Outer housing (1) bottom is equipped with multiple smoke detectors (4) and 360 ° of monitoring probes (5), and flameproof case body (1) front end face is set
Have alarm lamp (6), flameproof case body (1) inner cavity is equipped with master control borad (7)；The master control borad (7) is equipped with centre
Manage device (8), radio network gateway (9), memory (10), image capture module (11) and the Internet module (12), the smoke detection
Device (4) passes through radio network gateway (9) connection central processing unit (8), the memory (10), alarming horn (3) and alarm lamp
(6) it is separately connected central processing unit (8), 360 ° of monitoring probes (5) connect central processing by Image Acquisition mould (11) block
Device (8), the central processing unit (8) are separately connected background monitoring center (13) and owner's terminal by the Internet module (12)
(14)。
2. a kind of smoke detector based on wireless network according to claim 1, it is characterised in that：The wireless network
Closing (9) includes WIFI transceiver module (15), data processing module (16), 300-500MHz RF receiving and transmission module (17) and power supply mould
Block (18), the data processing module (16) are separately connected WIFI transceiver module (15), 300-500MHz RF receiving and transmission module
(17) and power module (18).
3. a kind of smoke detector based on wireless network according to claim 1, it is characterised in that：The centre
Manage the single-chip microcontroller that device (8) use model N76E003.
4. a kind of smoke detector based on wireless network according to claim 1, it is characterised in that:Outside the fire prevention
Shell (1) component includes 10-20 parts of carbon fiber, 20-30 parts of EVA resin, 6-12 parts of aluminium hydroxide, magnesium hydroxide in parts by weight
3-9 parts, 3-6 parts of nylon particles, 1-3 parts of zinc hydroxyl stannate, 3-6 parts of ammonium phosphate, 5-12 parts of montmorillonite, 2-8 parts of antimony oxide.
5. realizing a kind of application method of the smoke detector based on wireless network described in claim 1, it is characterised in that:
Its application method includes the following steps：
A, smoke detector acquires indoor smoke signal in real time, once detecting smoke signal, triggers 360 ° of monitoring immediately and visits
Head work, acquires the picture signal of surrounding；
B, the picture signal of acquisition and smoke signal, which are transmitted in memory, saves, meanwhile, central processing unit sends alarm command,
Alarming horn issues alarm voice；
C, the alarm signal and picture signal of acquisition are sent to background monitoring center and owner's terminal by internet in real time, are convenient for
Processing in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810768785.5A CN108898780A (en) | 2018-07-13 | 2018-07-13 | A kind of smoke detector based on wireless network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810768785.5A CN108898780A (en) | 2018-07-13 | 2018-07-13 | A kind of smoke detector based on wireless network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108898780A true CN108898780A (en) | 2018-11-27 |
Family
ID=64349017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810768785.5A Pending CN108898780A (en) | 2018-07-13 | 2018-07-13 | A kind of smoke detector based on wireless network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108898780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110660181A (en) * | 2019-09-27 | 2020-01-07 | 中国十七冶集团有限公司 | Building safety evacuation system and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0020674A1 (en) * | 1978-12-21 | 1981-01-07 | Cerberus Ag | Smoke detector operating with scattered radiation. |
| EP0549888A1 (en) * | 1991-12-09 | 1993-07-07 | Nohmi Bosai Ltd. | Fire detector |
| CN101894442A (en) * | 2009-05-13 | 2010-11-24 | 鞍点有限责任两合公司 | Fire alarm |
| CN202394332U (en) * | 2011-11-22 | 2012-08-22 | 爱国者电子科技有限公司 | Smoke detector with prewarning and prompting functions |
| CN203838844U (en) * | 2014-01-27 | 2014-09-17 | 陈星光 | Wireless networking smog detector |
| CN104200610A (en) * | 2014-09-27 | 2014-12-10 | 江阴市电工合金有限公司 | Monitoring system |
| CN204256876U (en) * | 2014-11-25 | 2015-04-08 | 武汉理工大学 | A kind of interactive smoke detector |
| CN204856809U (en) * | 2015-07-31 | 2015-12-09 | 沈阳灏金环保科技有限公司 | Multi -functional environmental monitoring system |
| CN206133846U (en) * | 2016-08-31 | 2017-04-26 | 依兰县*** | Forest fire intelligent early warning and automatic monitoring device |
| CN107065695A (en) * | 2017-05-27 | 2017-08-18 | 合肥酷特信息科技有限公司 | A kind of building safety defense monitoring system based on mobile terminal |
| CN206463405U (en) * | 2017-01-11 | 2017-09-05 | 新昌县大成生物科技有限公司 | A kind of fire visits equipment safety detecting system |
| CN207097188U (en) * | 2017-08-16 | 2018-03-13 | 广州智广电子科技有限公司 | It is a kind of can monitoring remote video with control intelligent cigarette sense fire-alarm |
-
2018
- 2018-07-13 CN CN201810768785.5A patent/CN108898780A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0020674A1 (en) * | 1978-12-21 | 1981-01-07 | Cerberus Ag | Smoke detector operating with scattered radiation. |
| EP0549888A1 (en) * | 1991-12-09 | 1993-07-07 | Nohmi Bosai Ltd. | Fire detector |
| CN101894442A (en) * | 2009-05-13 | 2010-11-24 | 鞍点有限责任两合公司 | Fire alarm |
| CN202394332U (en) * | 2011-11-22 | 2012-08-22 | 爱国者电子科技有限公司 | Smoke detector with prewarning and prompting functions |
| CN203838844U (en) * | 2014-01-27 | 2014-09-17 | 陈星光 | Wireless networking smog detector |
| CN104200610A (en) * | 2014-09-27 | 2014-12-10 | 江阴市电工合金有限公司 | Monitoring system |
| CN204256876U (en) * | 2014-11-25 | 2015-04-08 | 武汉理工大学 | A kind of interactive smoke detector |
| CN204856809U (en) * | 2015-07-31 | 2015-12-09 | 沈阳灏金环保科技有限公司 | Multi -functional environmental monitoring system |
| CN206133846U (en) * | 2016-08-31 | 2017-04-26 | 依兰县*** | Forest fire intelligent early warning and automatic monitoring device |
| CN206463405U (en) * | 2017-01-11 | 2017-09-05 | 新昌县大成生物科技有限公司 | A kind of fire visits equipment safety detecting system |
| CN107065695A (en) * | 2017-05-27 | 2017-08-18 | 合肥酷特信息科技有限公司 | A kind of building safety defense monitoring system based on mobile terminal |
| CN207097188U (en) * | 2017-08-16 | 2018-03-13 | 广州智广电子科技有限公司 | It is a kind of can monitoring remote video with control intelligent cigarette sense fire-alarm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110660181A (en) * | 2019-09-27 | 2020-01-07 | 中国十七冶集团有限公司 | Building safety evacuation system and use method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181127 |
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