CN104751592B - Free-standing smoke sensitive fire hazard detection alarm and its alarm method - Google Patents
Free-standing smoke sensitive fire hazard detection alarm and its alarm method Download PDFInfo
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- CN104751592B CN104751592B CN201510177474.8A CN201510177474A CN104751592B CN 104751592 B CN104751592 B CN 104751592B CN 201510177474 A CN201510177474 A CN 201510177474A CN 104751592 B CN104751592 B CN 104751592B
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- 239000000779 smoke Substances 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004891 communication Methods 0.000 claims abstract description 29
- 238000003384 imaging method Methods 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 230000006855 networking Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- 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
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
- Alarm Systems (AREA)
Abstract
A kind of free-standing smoke sensitive fire hazard detection alarm and its alarm method, being related to a kind of alarm and its alarm method, alarm includes power subsystem, smoke detector alarm unit, imaging and memory cell, GSM/GPRS units, local area radio communication unit and master control unit；Method includes step：Preset warning message and preset mobile phone number sets, it is standby, alarm and send wake-up signal, upper electricity, scene and take pictures, send preset alarming short message and cell-phone number code character, sending photo and preset mobile phone number sets, transmission audio alert information etc..The present invention can take pictures in scene of fire, and preset short message and scene photograph to preset mobile phone number sets can be transmitted；Preset mobile phone number can be dialed, mobile phone transmits preset alarm voice after connecting；Periphery the type alarm can be cooperateed with and send evacuation escape sound and light alarm.Therefore, the present invention can reduce the Probability of the heavy losses of property and casualties, also with simple structure, lower-cost feature, it is easy to promote the use of.
Description
Technical field
The present invention relates to a kind of alarm and its alarm method, more particularly to a kind of free-standing smoke sensitive fire hazard detection alarm
And its alarm method.
Background technology
Smog is the early stage phenomenon of fire, and the hair of fire can earliest be detected using smoke sensitive fire hazard detection alarm
It is raw, it can quick response be suspended in smoke particle produced by burning and pyrolysis in its near its circumference air, so, feel cigarette
Fire detection alarm be at present in the world application relatively popularize, the more fire detector of installation number, can detect 70% with
On fire.Traditional free-standing smoke sensitive fire hazard detection alarm can only send acousto-optic report when there is fire in installation site
Alert signal, once scene nobody, or only child or weak old man then cannot in time process fire condition, especially in fire
The early stage that calamity occurs, easily cause great property loss and casualties.
The content of the invention
The technical problem to be solved in the present invention is：A kind of free-standing smoke sensitive fire hazard detection alarm and its alarm side are provided
Method, with solve prior art presence can only send sound and light alarm signal in installation site, easily cause great property loss
With the weak point of casualties.
Solving the technical scheme of above-mentioned technical problem is：A kind of free-standing smoke sensitive fire hazard detection alarm, including power supply list
Unit, smoke detector alarm unit, imaging and memory cell, GSM/GPRS units, local area radio communication unit and master control
Unit, described power subsystem output end connects with the power input of smoke detector alarm unit, master control unit respectively
Connect, smoke detector alarm unit, imaging and memory cell, GSM/GPRS units, local area radio communication unit respectively with always
The input/output terminal connection of control unit.
Further technical scheme of the invention is：Described power subsystem includes AC/DC and reserve battery charhing unit,
For providing power supply for smoke detector alarm unit, master control unit.
Further technical scheme of the invention is：Described smoke detector alarm unit includes smoke detector report
Alert device, for detecting surrounding environment smokescope, and when smokescope reaches alarming value, smoke sensitive fire hazard detection alarm sends
Sound and light alarm, while sending wake-up signal to master control unit.
Described imaging and memory cell be used to after the instruction for receiving master control unit taking pictures scene and incite somebody to action
Photo is transferred to master control unit after preserving.
Described GSM/GPRS units are used to receive and send the communication information between master control unit and mobile phone.
Described local area radio communication unit can voluntarily networking, believe for receiving and sending master control unit and neighboring area
Communication information in the range of number between other alarms.
Described master control unit includes central processing unit, for receiving the detection that smoke detector alarm unit is transmitted
Signal is simultaneously processed, while being controlled to whole system.
Another technical scheme of the invention is：A kind of alarm method of free-standing smoke sensitive fire hazard detection alarm, the party
Method is comprised the following steps：
S1. preset warning message and preset mobile phone number sets：
Setting self-locking button is pressed, into phone number pre-set programs, the power supply circuit for connecting GSM/GPRS units is opened
Close, the information with preset mobile phone number sets, alarming short message content and audio alert word content is sent to GSM/ with mobile phone
GPRS units, are stored after master control unit resolves, and setting self-locking button is pressed again, disconnect GSM/GPRS units
Power supply circuit is switched and exits pre-set programs；
S2. it is standby：
The power supply circuit switch of imaging and memory cell and GSM/GPRS units is disconnected by master control unit, local area radio
Communication unit and master control unit are in low-power consumption standby state, and the alarm lamp timing of smoke detector alarm unit is dodged
It is bright, and automatic detection surrounding environment smokescope；
S3. alarm and send wake-up signal：
Smoke detector alarm unit detects smokescope and reaches alarming value, and alarm lamp starts quick regular
Ground flicker, and be synchronized with flicker and send high-decibel alarm sound, while sending wake-up signal to master control unit；
S4. electricity on imaging unit and memory cell, GSM/GPRS units：
After master control unit is waken up, connects imaging unit and memory cell, the power supply circuit of GSM/GPRS units are opened
Close；
S5. scene is taken pictures：
Imaging and memory cell timing are taken pictures to scene and are transferred to master control unit after photo is preserved；
S6. preset alarming short message and preset mobile phone number sets are sent：
Preset alarming short message and preset mobile phone number sets are transferred to GSM/GPRS units and are sent out by master control unit
Send；
S7. photo and preset mobile phone number sets are sent：
The photo and preset mobile phone number sets that master control unit transmits imaging unit are transmitted further to GSM/GPRS units and enter
Row sends；
S8. audio alert information is transmitted：
Master control unit dials to the phone number for being transferred to GSM/GPRS units, and detection transmits preset after being picked up
Audio alert information；
S9. other alarms collaboration sends evacuation escape sound and light alarm signal：
Master control unit local area radio communication unit is waken up, and by voluntarily networking, fire signal situation is passed through
Local area radio communication unit is sent to other alarms in the range of signal of neighboring area, after other alarms receive signal, all
Collaboration sends the evacuation escape sound and light alarm signal for being different from fire alarm signal.
Further technical scheme of the invention is：In step s 6, described GSM/GPRS units are short by preset alarm
Number of times >=3 that letter and preset mobile phone number sets are transmitted；In the step s 7, described GSM/GPRS units are by photo and in advance
If number of times >=3 that cell-phone number code character is transmitted.
In step s 2, when outside has a power failure, reserve battery starts to enable, and the alarm of smoke detector alarm unit refers to
Show that lamp timing flashes, and automatic detection surrounding environment smokescope；After backup battery voltage is less than under-voltage value, smoke is visited
Survey alarm unit and be simultaneously emitted by very brief " drop " sound and luminous instruction, and wake up master control unit, connect GSM/GPRS mono-
The power supply circuit switch of unit, GSM/GPRS units are transferred to by preset repair and maintenance short message content and related personnel's cell-phone number code character
It is transmitted, transmission times >=3, notifies that related personnel now should in time change battery；Timing under-voltage carries out short message hair by described
The process sent is not retransmited after being repeated 3 times.
Due to using said structure, the free-standing smoke sensitive fire hazard detection alarm and its alarm method and existing skill of the present invention
Art is compared, and is had the advantages that：
1. the Probability of the heavy losses of property and casualties can be reduced：
Due to alarm of the invention include power subsystem, smoke detector alarm unit, imaging and memory cell,
GSM/GPRS units, local area radio communication unit and the big part of master control unit six, with following function：（1）Fire shows
Take pictures field：When detecting fire generation, start imaging system, take live panoramic picture and store；（2）Send preset short message and
Scene photograph is to cell-phone number code character set in advance；（3）Phone number set in advance is dialed, mobile phone transmits preset report after connecting
Poster sound；（4）Inform that fire, periphery the type alarm association have been detected in periphery the type alarm this place by voluntarily networking
Escape sound and light alarm is evacuated with sending.
Therefore, the present invention continuously sends several fire alarms can to when there is fire the cell-phone number code character for pre-setting
Short message and scene photograph, then dial the cell-phone number code character for pre-setting, and built-in audio alert content is transmitted after answering, and
Inform that periphery fire detection alarm is alarmed jointly.Thus the present invention independently and can be cooperateed with a range of when fire occurs
There is sound and light alarm and notify near field personnel in other the type fire detection alarms, while being sued and laboured troop and correlation to distal end immediately
Personnel send the condition of a disaster instant messages and carry out Evacuation, and the origin cause of formation and process the offer discriminatory analysis foundation to fire jointly, from
And the Probability of the heavy losses of property and casualties can be reduced.
2. simple structure, method is easy, and cost is relatively low, it is easy to promote the use of：
Due to alarm of the invention include power subsystem, smoke detector alarm unit, imaging and memory cell,
GSM/GPRS units, local area radio communication unit and the big part of master control unit six, without complicated part, structure
Simply, method is easy, and cost is relatively low, it is easy to promote the use of.
Below, in conjunction with the accompanying drawings and embodiments to the present invention free-standing smoke sensitive fire hazard detection alarm and its alarm method
Technical characteristic is further described.
Brief description of the drawings
Fig. 1：The structured flowchart of the free-standing smoke sensitive fire hazard detection alarm of the present invention described in embodiment one.
Specific embodiment
Embodiment one：
A kind of free-standing smoke sensitive fire hazard detection alarm, including power subsystem, smoke detector alarm unit, imaging and
Memory cell, GSM/GPRS units, local area radio communication unit and master control unit, described power subsystem output end difference
Power input with smoke detector alarm unit, master control unit is connected, smoke detector alarm unit, imaging and
The input/output terminal of memory cell, GSM/GPRS units, local area radio communication unit respectively with master control unit is connected.
Described power subsystem includes AC/DC and reserve battery charhing unit, for alarming single for smoke detector
Unit, master control unit provide power supply.
Described smoke detector alarm unit includes smoke sensitive fire hazard detection alarm, the smoke sensitive fire hazard detection alarm
It is known technology, for detecting surrounding environment smokescope, and when smokescope reaches alarming value, smoke detector alarm
Device sends sound and light alarm, while sending wake-up signal to master control unit.
Described imaging and memory cell be used to after the instruction for receiving master control unit taking pictures scene and incite somebody to action
Photo is transferred to master control unit after preserving.
Described GSM/GPRS units are used to receive and send the communication information between master control unit and mobile phone.
Described local area radio communication unit can voluntarily networking, believe for receiving and sending master control unit and neighboring area
Communication information in the range of number between other alarms.
Described master control unit includes central processing unit, for receiving the detection that smoke detector alarm unit is transmitted
Signal is simultaneously processed, while being controlled to whole system.
Embodiment two：
A kind of alarm method of free-standing smoke sensitive fire hazard detection alarm, the method is comprised the following steps：
S1. preset warning message and preset mobile phone number sets：
Before preset warning message and phone number, the power supply mode of the alarm used in the method is to use under normal circumstances
External communication 220V powers, and is powered using built-in rechargeable battery under civil power disconnection, under normal circumstances AC/DC units
Reserve battery is charged, floating charge state is entered after being full of.
Setting self-locking button is pressed, into phone number pre-set programs, the power supply circuit for connecting GSM/GPRS units is opened
Close, the information with preset mobile phone number sets, alarming short message content and audio alert word content is sent to GSM/ with mobile phone
GPRS units, are stored after master control unit resolves, and setting self-locking button is pressed again, disconnect GSM/GPRS units
Power supply circuit is switched and exits pre-set programs；
S2. it is standby：
Under normal circumstances, the power supply circuit switch of imaging and memory cell and GSM/GPRS units is broken by master control unit
Open, local area radio communication unit and master control unit are in low-power consumption standby state, the alarm of smoke detector alarm unit
Indicator lamp timing flashes（Every continuous flicker per minute twice）, and with the time automatic detection surrounding environment smokescope of 1.5 seconds；
When outside has a power failure, reserve battery starts to enable, the smoke detector alarm of smoke detector alarm unit
The alarm lamp timing of device flashes（Every flicker per minute once）, then again with the time automatic detection surrounding environment of 1.5 seconds
Smokescope；After backup battery voltage is less than under-voltage value, smoke sensitive fire hazard detection alarm interval is simultaneously emitted by very brief for 1 minute
" drop " sound and luminous instruction, and master control unit is waken up, the power supply circuit switch of GSM/GPRS units is connected, will be preset
Repair and maintenance short message content and related personnel's cell-phone number code character are transferred to GSM/GPRS units and are transmitted, and require send for several times >=
3, notify that related personnel now should in time change battery；Consecutive intervals 1 minute are by the foregoing under-voltage process weight for carrying out short message sending
No longer send afterwards for multiple 3 times.
S3. alarm and send wake-up signal：
Smoke detector alarm unit detects smokescope and reaches alarming value, and alarm lamp starts quick regular
Ground flicker, and be synchronized with flicker and send high-decibel alarm sound, while sending wake-up signal to master control unit；
S4. electricity on imaging unit and memory cell, GSM/GPRS units：
After master control unit is waken up, connects imaging unit and memory cell, the power supply circuit of GSM/GPRS units are opened
Close；
S5. scene is taken pictures：
Imaging and memory cell were taken pictures to scene every 40 seconds and are transferred to master control unit after photo is preserved；
S6. preset alarming short message and preset mobile phone number sets are sent：
Master control unit ceases preset alarming short message and preset mobile phone number sets are transferred to GSM/GPRS units and carry out
Send, send for several times >=3；
S7. photo and preset mobile phone number sets are sent：
It is mono- that the photo and default cell-phone number code character that master control unit transmits imaging unit are transmitted further to GSM/GPRS
Unit is transmitted, and sends for several times >=3；
S8. audio alert information is transmitted：
Master control unit dials to the phone number for being transferred to GSM/GPRS units, and detection transmits preset after being picked up
Audio alert information；
S9. other alarms collaboration sends evacuation escape sound and light alarm signal：
Master control unit local area radio communication unit is waken up, and by voluntarily networking, fire signal situation is passed through
Local area radio communication unit is sent to other alarms in the range of signal of neighboring area, after other alarms receive signal, all
Collaboration sends the evacuation escape sound and light alarm signal for being different from fire alarm signal, evacuates for early warning in fire and in advance periphery
Personnel, also beneficial to effectively lookup fire location, but will not start respective imaging and memory cell and GSM/GPRS units,
Will not wake up respective local area radio communication unit.
Claims (10)
1. a kind of alarm method of free-standing smoke sensitive fire hazard detection alarm, it is characterised in that：The method is comprised the following steps：
S1. preset warning message and preset mobile phone number sets：
Setting self-locking button is pressed, into phone number pre-set programs, the power supply circuit switch of GSM/GPRS units is connected, used
It is mono- to GSM/GPRS that mobile phone sends the information with preset mobile phone number sets, alarming short message content and audio alert word content
Unit, is stored after master control unit resolves, and setting self-locking button is pressed again, disconnects the power supply electricity of GSM/GPRS units
Way switch simultaneously exits pre-set programs；
S2. it is standby：
The power supply circuit switch of imaging and memory cell and GSM/GPRS units is disconnected by master control unit, local area radio communication
Unit and master control unit are in low-power consumption standby state, and the alarm lamp timing of smoke detector alarm unit flashes,
And automatic detection surrounding environment smokescope；
S3. alarm and send wake-up signal：
Smoke detector alarm unit detects smokescope and reaches alarming value, and alarm lamp starts quickly regularly to dodge
Sparkle, and be synchronized with flicker and send high-decibel alarm sound, while sending wake-up signal to master control unit；
S4. imaging and memory cell, GSM/GPRS units on electricity：
After master control unit is waken up, imaging and memory cell, the power supply circuit switch of GSM/GPRS units are connected；
S5. scene is taken pictures：
Imaging and memory cell timing are taken pictures to scene and are transferred to master control unit after photo is preserved；
S6. preset alarming short message and preset mobile phone number sets are sent：
Preset alarming short message and preset mobile phone number sets are transferred to GSM/GPRS units and are transmitted by master control unit；
S7. photo and preset mobile phone number sets are sent：
The photo and preset mobile phone number sets that master control unit transmits imaging unit are transmitted further to GSM/GPRS units and are sent out
Send；
S8. audio alert information is transmitted：
Master control unit dials to the phone number for being transferred to GSM/GPRS units, and detection transmits preset language after being picked up
Sound warning message；
S9. other alarms collaboration sends evacuation escape sound and light alarm signal：
Master control unit local area radio communication unit is waken up, and by voluntarily networking, fire signal situation is passed through into local
Radio communication unit is sent to other alarms in the range of signal of neighboring area, after other alarms receive signal, all collaborations
Send the evacuation escape sound and light alarm signal for being different from fire alarm signal.
2. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 1, it is characterised in that：In step
In S6, number of times >=3 that be transmitted for preset alarming short message and preset mobile phone number sets by described GSM/GPRS units；
In step S7, number of times >=3 that be transmitted for photo and preset mobile phone number sets by described GSM/GPRS units.
3. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 1, it is characterised in that：In step
In S2, when outside has a power failure, reserve battery starts to enable, and the alarm lamp timing of smoke detector alarm unit flashes,
And automatic detection surrounding environment smokescope；After backup battery voltage is less than under-voltage value, smoke detector alarm unit is same
When send very brief " drop " sound and it is luminous indicate, and wake up master control unit, connect the power supply circuit of GSM/GPRS units
Switch, is transferred to preset repair and maintenance short message content and related personnel's cell-phone number code character GSM/GPRS units and is transmitted, sends out
Number of times >=3 are sent, notifies that related personnel now should in time change battery；Be repeated 3 times for the under-voltage process for carrying out short message sending by timing
Do not retransmit afterwards.
4. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 1, it is characterised in that：Stand alone type
Smoke sensitive fire hazard detection alarm includes power subsystem, smoke detector alarm unit, imaging and memory cell, GSM/GPRS
Unit, local area radio communication unit and master control unit, described power subsystem output end are alarmed with smoke detector respectively
The power input connection of unit, master control unit, smoke detector alarm unit, imaging and memory cell, GSM/GPRS
The input/output terminal of unit, local area radio communication unit respectively with master control unit is connected.
5. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 4, it is characterised in that：Described
Power subsystem includes AC/DC and reserve battery charhing unit, for being carried for smoke detector alarm unit, master control unit
Power supply source.
6. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 4, it is characterised in that：Described
Smoke detector alarm unit includes smoke sensitive fire hazard detection alarm, for detecting surrounding environment smokescope, and works as smog
When concentration reaches alarming value, smoke sensitive fire hazard detection alarm sends sound and light alarm, while sending wake-up signal to master control unit.
7. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 4, it is characterised in that：Described
Imaging and memory cell are transmitted after being used to take pictures scene after the instruction for receiving master control unit and preserve photo
Give master control unit.
8. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 4, it is characterised in that：Described
GSM/GPRS units are used to receive and send the communication information between master control unit and mobile phone.
9. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 4, it is characterised in that：Described
Local area radio communication unit can voluntarily networking, for receiving and sending other reports in master control unit and neighboring area range of signal
Communication information between alert device.
10. the alarm method of free-standing smoke sensitive fire hazard detection alarm according to claim 4, it is characterised in that：It is described
Master control unit include central processing unit, for receiving detection signal that smoke detector alarm unit transmits and processing,
Whole system is controlled simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177474.8A CN104751592B (en) | 2015-02-13 | 2015-04-15 | Free-standing smoke sensitive fire hazard detection alarm and its alarm method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015100784418 | 2015-02-13 | ||
| CN201510078441 | 2015-02-13 | ||
| CN201510177474.8A CN104751592B (en) | 2015-02-13 | 2015-04-15 | Free-standing smoke sensitive fire hazard detection alarm and its alarm method |
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| Publication Number | Publication Date |
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| CN104751592A CN104751592A (en) | 2015-07-01 |
| CN104751592B true CN104751592B (en) | 2017-06-06 |
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| CN201510177474.8A Expired - Fee Related CN104751592B (en) | 2015-02-13 | 2015-04-15 | Free-standing smoke sensitive fire hazard detection alarm and its alarm method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128006A (en) * | 2016-08-22 | 2016-11-16 | 杭州北海信息系统有限公司 | Wireless fire disaster Alarm Communications System |
| CN109121095B (en) * | 2018-08-10 | 2020-08-11 | 湖北华中光电科技有限公司 | Simulation training device with intelligent power management function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20050102541A (en) * | 2004-04-22 | 2005-10-26 | 엘지전자 주식회사 | Fire alarm apparatus and method for mobile station |
| CN101751755B (en) * | 2010-01-05 | 2011-12-14 | 重庆英卡电子有限公司 | Forest fireproofing early warning system |
| CN202142156U (en) * | 2011-07-15 | 2012-02-08 | 陈奇 | Wireless self-networking network type fire hazard smoke alarm |
| CN202422339U (en) * | 2012-01-19 | 2012-09-05 | 重庆英卡电子有限公司 | Internet of things early warning device for forest fire prevention |
| CN103680041A (en) * | 2013-11-30 | 2014-03-26 | 四川邮科通信技术有限公司 | Intelligent fire escape indicating device applied to public place |
| CN204596062U (en) * | 2015-02-13 | 2015-08-26 | 柳州市华航电器有限公司 | Stand alone type smoke sensitive fire hazard detection alarm |
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Effective date of registration: 20170623 Address after: 545616 the Guangxi Zhuang Autonomous Region Liuzhou Liu Dong New Area Guantang Pioneer Park East Road No. 2 Co-patentee after: Yin Wei Patentee after: LIUZHOU HUAHANG FIRE EQUIPMENT Co.,Ltd. Address before: 545616 the Guangxi Zhuang Autonomous Region Liuzhou Liu Dong New Area Guantang Pioneer Park East Road No. 2 Co-patentee before: Yin Wei Patentee before: LIUZHOU HUAHANG ELECTRIC EQUIPMENT CO.,LTD. |
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Granted publication date: 20170606 |