CN114511982B - Smoke alarm method and intelligent smoke alarm - Google Patents
Smoke alarm method and intelligent smoke alarm Download PDFInfo
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- CN114511982B CN114511982B CN202210409277.4A CN202210409277A CN114511982B CN 114511982 B CN114511982 B CN 114511982B CN 202210409277 A CN202210409277 A CN 202210409277A CN 114511982 B CN114511982 B CN 114511982B
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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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- 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
- G08B25/08—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 communication transmission lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention provides a smoke alarm method and an intelligent smoke alarm, wherein environmental parameters in a scene are collected through a microprocessor (6), when one or more of the environmental parameters exceed a set threshold value, an infrared sensor (8) acquires a scene image to determine an abnormal position, a millimeter wave radar sensor (9) acquires scene personnel information, the action direction of the scene personnel in the scene image is determined according to the scene image and the scene personnel information, when the action direction of the personnel faces the abnormal position and is 1.2-3 m away from the abnormal position, no alarm information is generated, and if the abnormal position still exists after 8-15 seconds, a voice prompt alarm is sent to the field personnel until the abnormal position disappears; and after 8-15 seconds, if the abnormal positions of the personnel within the range of 1.2-3 meters are increased, an alarm signal is sent until the abnormal positions disappear. And when the action direction of the personnel is not towards the abnormal position, a voice prompt alarm is sent out, and the time is kept for 5-10 seconds. Different alarm modes effectively avoid fire accidents.
Description
Technical Field
The invention relates to the technical field of alarm devices, in particular to a smoke alarm method and an intelligent smoke alarm.
Background
With the rapid development of economy, the rapid increase of the utilization rate of natural gas brings huge changes to the life of people, industrial gas is used more and more in factories, and although the use of combustible gas brings convenience to the life of people, huge potential safety hazards also exist. Except that the gas is revealed, because the user leaves the gas fire or gas explosion that cause that "the pot burns burnt" that the kitchen caused for a long time also are common domestic gas incident, because "the pot burns burnt" does not cause the gas to leak, consequently intelligence smoke alarm can not send the warning to the user. Meanwhile, a lot of people like frying with high-temperature oil when cooking, and meanwhile, the doors and windows of the kitchen are closed, so that oil smoke pollution of the small environment of the kitchen is serious, the oil smoke in the indoor air usually exceeds normal indexes, and the health of residents is influenced.
The existing infrared sensor can accurately identify organisms and flames, but has the characteristics of poor motion discrimination capability, long distance measurement of a millimeter wave radar, high reliability, no influence of light and dust and the like, but has low resolution ratio and can not identify images. The traditional smoke alarm can only detect and alarm smoke, and cannot sense vital signs and trapped positions of trapped people in a building. The invention discloses a Chinese patent invention, and relates to an intelligent smoke alarm method, device and system, application number CN201810229010.0, wherein a scene image is obtained through a panoramic camera, and according to whether the sight direction of a person in the image gathers at an abnormal position, if the sight direction of the person gathers at the abnormal position, no alarm information is generated, and false alarms are effectively reduced. Although the intelligent smoke alarm method can reduce the false alarm rate, the intelligent smoke alarm method cannot judge whether the personnel carry out effective fire-fighting measures.
Disclosure of Invention
In view of this, when solving smoke alarm and not having the air purification function, intelligence smoke alarm can also select different alarm methods according to whether have personnel on the scene, has effectively avoided the fire control accident.
The technical purpose of the invention is realized by the following technical scheme:
a smoke alarm method, the smoke alarm method comprising:
acquiring signals of a smoke sensor, a carbon monoxide detector and a laser PM2.5 particle sensor through a microprocessor to acquire environmental parameter information in a scene, wherein the environmental parameter information comprises one or more of gas concentration, smoke concentration, carbon monoxide concentration, air PM value and environmental temperature parameter;
when the environmental parameter information reaches a preset response threshold value, the infrared sensor acquires a scene image, the millimeter wave radar sensor acquires scene personnel information, and the microprocessor starts the air filtering device, wherein the preset response threshold value comprises the following steps: the gas concentration response threshold is 5-50% LEL, the smoke concentration response threshold is 5% OBS/M-15% OBS/M, the carbon monoxide concentration response threshold is 120ppm-250ppm, and PM2.5 is less than 75 mu g/M3The ambient temperature response threshold is 50-70 degrees;
determining the action direction of scene personnel in the scene image according to the scene image and the scene personnel information, and judging whether the action direction of the personnel faces to an abnormal position; wherein the abnormal position is determined according to a hidden ignition point or an ignition point found by thermal imaging of the infrared sensor (8);
according to the action direction of the personnel, the alarm mode is as follows:
when the action direction of the personnel faces to the abnormal position and is 1.2-3 meters away from the abnormal position, no alarm information is generated, and if the abnormal position within the range of 1.2-3 meters of the personnel still exists after 8-15 seconds, a voice prompt alarm is sent to the field personnel until the abnormal position disappears; after 8-15 seconds, if the abnormal positions of the personnel within the range of 1.2-3 meters are increased, an audible and visual alarm signal is sent until the abnormal positions disappear;
and when the action direction of the personnel is not towards the abnormal position, sending voice prompt alarm to the personnel on site, and keeping the time for 5-10 seconds.
Preferably, when no personnel information exists in the scene, the alarm mode is as follows:
the microprocessor sends the abnormal information to the video monitoring device, starts the video monitoring device, gives an alarm through voice prompt in the first step, and keeps the time for 5 to 10 seconds; secondly, alarming by red light flashing of a video monitoring display device for 5 to 10 seconds; thirdly, giving an alarm through sending a video to a room where a person is located; the system simultaneously reminds and alarms in a room with people through video picture flicker and sound;
preferably, the microprocessor can also send information to the networked communication equipment through the zigbee module to play a role in family reminding.
The utility model provides an intelligence smoke alarm, includes intelligence smoke alarm body, intelligence smoke alarm body comprises last casing, lower casing, base, is provided with microprocessor in the upper casing, with microprocessor electric connection's respectively smoke transducer, infrared sensor, millimeter wave radar sensor, carbon monoxide detector, laser
The device comprises an optical PM2.5 particle sensor, a zigbee module and an alarm device; the top of the upper shell is provided with an exhaust port, and the front side of the upper shell is provided with an LED display screen; the front side of the lower shell is provided with an air filtering device.
Preferably, the microprocessor collects signals of the smoke sensor, the carbon monoxide detector and the laser PM2.5 particle sensor to form environmental parameter information, and the environmental parameter information is displayed through the LED display screen.
Preferably, the microprocessor collects the infrared sensor signal to form a scene image; the microprocessor collects signals of the millimeter wave radar sensor to form scene personnel information, and the scene personnel information comprises personnel action direction, speed, position and vital signs.
Preferably, the intelligent smoke alarm is interconnected with an indoor original video monitoring device through a zigbee module, and the intelligent gas alarm and the video monitoring device are connected with the intelligent home control system in an all-in-one mode.
Preferably, the air filtering device is sequentially provided with an oil filtering screen plate, a sintered filter core layer, a carbon adsorption layer, a fan, a power supply and an exhaust pipe from outside to inside.
Preferably, the power supply is electrically connected to the microprocessor, and includes a driving power supply and a standby power supply.
Preferably, the alarm device comprises an audible and visual alarm and a voice prompt.
Preferably, the intelligent smoke alarm body is of an arc structure with the front surface inwards concave.
Advantageous effects
1. This intelligence smoke alarm fuses infrared sensor and millimeter wave radar advantage, both exerted infrared sensor thermal imaging principle and found abnormal position, exerted millimeter wave radar again and obtained personnel's information under target motion state or quiescent condition, be favorable to the alarm to start different alarm methods according to abnormal position and personnel's information, remove until the dangerous situation, still be favorable to solving under the not enough or high not good condition of visibility of smog concentration, stranded personnel's vital sign and stranded position in the unable perception building, bring the inconvenience for fire rescue.
2. This intelligence smoke alarm still can be connected with indoor original video monitoring device interconnection through zigbee module, perhaps is connected with intelligent house control system through the networking, provides on-the-spot multiple alarm mode when having no personnel, is favorable to avoiding the fire incident, avoids accident such as "the pot is burnt out of paste" or carbon monoxide poisoning.
3. This intelligence smoke alarm body lower extreme adopts the arc design, when increase filtration area, is favorable to reducing the air flow resistance, and the circulation of air of being convenient for purifies, discharges, and alarm compact structure is small and exquisite, can place at kitchen, bedroom or bathroom as required.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the intelligent smoke alarm of the present invention;
FIG. 2 is a schematic flow diagram of a smoke alarm method of the intelligent smoke alarm of the present invention;
FIG. 3 is a block diagram of the internal circuit architecture of the intelligent smoke alarm of the present invention;
in the figure, an intelligent smoke alarm body 1, an upper shell 2, a lower shell 3, a base 4, an exhaust port 5, an air filtering device 21, a microprocessor 6, a smoke sensor 7, an infrared sensor 8, a millimeter wave radar sensor 9, a carbon monoxide detector 10, a laser PM2.5 particle sensor 11, a zigbee module 12, an alarm device 13 and an LED display screen 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like (if any) or "left," "right," "front," "back," "top," "bottom" in the description and in the claims of the present invention are used for distinguishing between similar elements or for facilitating a structural description of the present invention and are not necessarily used to describe a particular order or sequence or to limit structural features of the present invention. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the smoke alarm method provided by the present invention is as follows:
in step S101, acquiring signals of the smoke sensor 7, the carbon monoxide detector 10, and the laser PM2.5 particle sensor 11 by the microprocessor 6 to acquire environmental parameter information in a scene;
specifically, the environmental parameter may include one or more of a gas concentration, a smoke concentration, a carbon monoxide concentration, an air PM value, a temperature, and the like. Correspondingly, the smoke sensor can be an ion type smoke sensor, a photoelectric type smoke sensor, a gas-sensitive type smoke sensor and the like.
In steps S102 and S103, when the environmental parameter information reaches a predetermined response threshold, the infrared sensor 8 acquires a scene image, the millimeter wave radar sensor 9 acquires scene personnel information, and the microprocessor 6 starts the air filtering device 21 to purify air;
specifically, the predetermined response threshold includes: the gas concentration response threshold is 5-50% LEL, the smoke concentration response threshold is 5% OBS/M-15% OBS/M, the carbon monoxide concentration response threshold is 120ppm-250ppm, and PM2.5 is less than 75 mu g/M3The ambient temperature response threshold is 50-70 deg..
Specifically, it is different to place the scene according to intelligent smoke alarm, and the scene image can be the panoramic picture of environment such as kitchen, bedroom, bathroom, sitting room, and through setting for the panoramic picture that infrared sensor 8 obtained the scene, through the panoramic picture who obtains, microprocessor 6 can be effectual carries out the analysis to the panoramic picture, including to including personnel in the panoramic picture, finds unusual positions such as recessive ignition point or ignition point in the panoramic picture according to the thermal imaging principle.
The millimeter wave radar sensor 9 adopts an FMCW radar sensor, and can realize long-distance sensing and detection because the millimeter wave radar has strong capability of acquiring the detection distance and speed of personnel in a target motion state, and can acquire the action direction of the personnel in a scene and realize activity state sensing by analyzing the motion speed and motion trail of the personnel in the scene detected by the millimeter wave radar; the millimeter wave radar also can acquire the heartbeat, the respiration and the body position of a person in a static state to realize the biological perception of the human body; the millimeter wave radar sensor is not affected by smoke, temperature, humidity, noise, airflow, dust, illumination and the like, and is suitable for severe environments with high smoke concentration and small visibility.
In step S201, the microprocessor 6 determines the action direction of the scene personnel in the scene image according to the scene image and the scene personnel information, and determines whether the action direction of the personnel faces to an abnormal position such as a smoke leakage port, a hidden fire point or a fire point; when the action direction of the personnel in the scene faces to the abnormal position and is 1.2-3 meters away from the abnormal position, no alarm information is generated, and after 8-15 seconds, if the abnormal position within the range of 1.2-3 meters of the personnel still exists, a voice prompter is sent to the personnel in the scene for alarming until the abnormal position disappears; after 8-15 seconds, if the abnormal positions of the personnel within the range of 1.2-3 meters are increased, an audible and visual alarm signal is sent out, other indoor personnel add fire control prevention and control after hearing the alarm until the abnormal positions disappear, and the fire control dangerous situation can be further prevented from further expansion; and when the action direction of the personnel is not towards the abnormal position, sending a voice prompting device alarm to the personnel on site, and keeping the time for 5-10 seconds.
The intelligent smoke alarm provided by the invention can be interconnected with an indoor original video monitoring device through the zigbee module 12, or connected with an indoor original intelligent home control system through networking. In step S202, when the microprocessor 6 determines that there is no person in the scene image according to the scene image and the scene person information, the microprocessor 6 may select the following manner to alarm according to the interconnection of the intelligent smoke alarm and the original indoor video monitoring device or the connection condition of the original indoor intelligent home control system:
the first method comprises the following steps: the microprocessor 6 sends the abnormal information to the video monitoring device, starts the video monitoring device, gives an alarm through voice prompt in the first step, and keeps the time for 5 to 10 seconds; second, the video monitoring display device
Flashing and alarming for 5 to 10 seconds in preparation of red light; thirdly, giving an alarm through sending videos in the scene to a room where people are in; the video alarm sends a signal to the video monitoring device through the microprocessor 6, and the system simultaneously reminds and alarms in a room with people through video image flicker and sound, thereby providing technical support for fire fighters to carry out ordered search and rescue in the process of affairs and inquiring and analyzing the alarm condition afterwards.
And the second method comprises the following steps: microprocessor 6 sends abnormal information to intelligent house control system, dials the central number of receiving police, the warning telephone that the user set up in advance or sends the SMS for the user through intelligent house system is automatic, starts corresponding fire control emergency scheme simultaneously, for example closes electrical apparatus power in the family, and the gas valve opens door and window, is favorable to avoiding the fire incident, reduces user's fire incident loss.
And the third is that: if the intelligent smoke alarm provided by the invention is not networked with a video monitoring device or an intelligent home control system, the abnormal information can be sent to the networked communication equipment through the zigbee module 12 to play a role in reminding the family.
As shown in fig. 2 and 3, the intelligent smoke alarm provided by the invention comprises an intelligent smoke alarm body 1, wherein the intelligent smoke alarm body is composed of an upper shell 2, a lower shell 3 and a base 4, a microprocessor 6 is arranged in the upper shell 2, a smoke sensor 7, an infrared sensor 8, a millimeter wave radar sensor 9, a carbon monoxide detector 10, a laser PM2.5 particle sensor 11, a zigbee module 12 and an alarm device 13 are respectively and electrically connected with the microprocessor 6, the microprocessor 6 collects signals of the smoke sensor 7, the carbon monoxide detector 10 and the laser PM2.5 particle sensor 11 to form environment parameter information, and the environment parameter information is displayed through an LED display screen 14. The microprocessor 6 collects signals of the infrared sensor 8 to form a scene image; the microprocessor 6 collects signals of the millimeter wave radar sensor 9 to form scene personnel information, wherein the scene personnel information comprises personnel action direction, motion track, speed, position, vital signs and the like.
As shown in figure 2, the air filtering device of the intelligent smoke alarm is of an arc-shaped structure, the area of the air filtering device is increased, the air filtering device is favorable for reducing the air flow resistance, the ventilation, purification and emission are facilitated, the alarm is compact and small in structure, and the intelligent smoke alarm can be placed in a kitchen, a bedroom or a toilet as required. When the environmental parameter information exceeds the preset response threshold value, the microprocessor 6 starts the air filtering device 21, air passes through the oil filtering screen plate, the sintered filter element layer and the carbon adsorption layer in sequence to carry out filtering, and is exhausted from the exhaust port 5 through the exhaust pipe, the air filtering precision range is reliable filtering performance from 1 mu to 100 mu, the meshes of the filtering layer are not easy to deform, and the repeated flushing cost is low.
Example one
The smoke alarm provided by the invention is placed on the ground or the position close to the wall within the range of 2-3 meters away from a kitchen range, the gas concentration response threshold is set to be 40LEL, the smoke concentration response threshold is set to be 15% OBS/M, the carbon monoxide concentration response threshold is set to be 240ppm, and the PM2.5 response threshold is set to be 70 mu g/M3The ambient temperature response threshold is 70. When any one or more of the above environmental parameter information collected by the microprocessor 6 exceeds the response threshold, the microprocessor 6 sends the information to the terminal client through the zigbee module 12, and the microprocessor 6 starts the air filtering device 21 to filter air; according to scene images and scene personnel information in a scene, if personnel exist in the scene, the intelligent smoke alarm selects the S201 mode to alarm, if no personnel exist in the scene, the intelligent smoke alarm selects the S202 mode to alarm according to whether the intelligent smoke alarm is interconnected with an indoor original video monitoring device or connected with an indoor original intelligent home control system through networking. If the gas concentration, the smoke concentration, the carbon monoxide concentration and the environmental temperature reach alarm values, the alarm sequence gives an alarm according to the sound prompt and the red light flashing alarmAnd the alarm and video alarm sequence is continuously carried out until the alarm is relieved or the alarm is stopped. Increase when unusual position, under the condition that environmental parameter concentration constantly increased, intelligence smoke alarm gives video monitoring device with signalling, makes it start the video recording function, and the signal of simultaneous transmission gives remote video monitor terminal, and intelligent control system closes electrical apparatus power in the family, and the gas valve opens door and window, plays and carries out orderly search and rescue for the fire fighter in the trouble and provides technical support, the effect of the inquiry analysis alert feelings afterwards. The alarm mode is nimble various, effectively avoids fire control incident.
The microprocessor 6 displays the environmental parameters in real time through the LED display screen, and a user can know the air environment condition in the scene at any time. The horizontal angle between the infrared sensor 8 and the stove does not exceed 120 degrees, so that the stove is ensured to be in the detection angle range of the infrared sensor 8, and original data of a detection area where the stove is not opened is required to be acquired when the stove is used for the first time. The infrared sensor 8 judges the change of the temperature of the kitchen range area by sensing the comparison of the temperature of the kitchen range detection area and the original data of the detection area, if people exist in a scene, the kitchen range can be judged to be normally opened when the temperature of the kitchen range area is 800-1000 ℃. After the stove is started, a stove closing reminding function can be set through the LED display screen 14, the timer is started to work, the closing time is up, if people exist in a scene, the microprocessor 6 starts the voice prompter to send out voice prompt, and the time is kept 10. If no person exists in the scene, the microprocessor 6 feeds back information to the video monitoring device through the zigbee module 12, the video monitoring device is started, the video monitoring device gives an alarm through sound in the first step, and the time is kept for 10 seconds; secondly, alarming by red light flashing for 10 seconds; and thirdly, sending the video to a room with people, giving an alarm through the video, if no people are in the room, networking and sending the information to communication equipment to play a role of reminding family members, and closing a gas valve by the intelligent household control system to be beneficial to avoiding gas explosion.
When the set closing reminding time is not reached, the intelligent smoke alarm detects that the concentration of carbon monoxide exceeds a response threshold value or the PM value of kitchen air exceeds the response threshold value, according to images in a scene of the infrared sensor 8, if a person exists in a kitchen, the microprocessor 6 starts the voice prompt to send voice prompt, the time is kept for 10 seconds, after 10 seconds, the concentration of carbon monoxide continuously increases, the audible and visual alarm gives out alarm information, and the LED display screen 14 is turned on and flickers in red until the concentration of carbon monoxide is reduced to a normal range. If no person exists in the kitchen, the microprocessor 6 feeds back information to the video monitoring device through the zigbee module 12, the video monitoring device is started, the video monitoring device gives an alarm through sound in the first step, and the time is kept for 10 seconds; secondly, alarming by red light flashing for 10 seconds; and thirdly, sending the video to a room with people, and giving an alarm through the video, if no people exist in the room, networking and sending the information to the communication equipment to play a role of reminding the family, and closing the gas valve by the intelligent control system, so that the carbon monoxide poisoning accident is avoided, and the gas fire or gas explosion safety accident caused by 'burnt pot' is reduced.
If a fire disaster happens, the intelligent smoke alarm starts the sound-light alarm device, automatically dials an alarm receiving center number, an alarm telephone or a short message which are preset by a user to the user through the intelligent home system, and simultaneously starts a corresponding fire emergency scheme, such as closing an electric appliance power supply in the home, opening a gas valve and opening a door and a window, so that the fire disaster can be controlled, and the loss of fire accidents of the user can be reduced. Microprocessor 6 feeds back information to video monitoring device through zigbee module 12, starts video monitoring device, and microprocessor 6 sends information such as personnel's motion track, speed, position, heartbeat, respiratory frequency, position that millimeter wave radar sensor 9 surveyed to video monitoring device in real time, sends information to communication equipment through the networking, provides technical support for fire control rescue.
In the embodiment, the infrared sensor 8 and the millimeter wave radar sensor 9 are integrated in the smoke alarm, and the infrared sensor thermal imaging principle is utilized to find the hidden ignition point or the abnormal positions such as the ignition point in the panoramic image. The millimeter wave radar sensor 9 detects the action direction of the personnel in the scene, and the alarm selects different alarm modes according to the disappearance or increase of abnormal positions within the safety range of 1.2-3 meters of the personnel and carries out voice prompt alarm and audible and visual alarm in sequence. The intelligent alarm provided by the invention is not influenced by smoke, temperature, humidity, noise, airflow, dust, illumination and the like, and is suitable for severe environments with high smoke concentration and small visibility.
Example two
This embodiment is the same as the first embodiment except that the intelligent smoke alarm is placed in a corner of an indoor toilet close to a wall, the gas concentration response threshold is set to 20LEL, the smoke concentration response threshold is set to 10% OBS/M, the carbon monoxide concentration response threshold is set to 180ppm, and the PM2.5 response threshold is set to 50 μ g/M3The ambient temperature response threshold is 60 °. When any one or more of the above environmental parameter information collected by the microprocessor 6 exceeds the response threshold, the microprocessor 6 sends the information to the terminal client through the zigbee module 12, the microprocessor 6 starts the air filtering device 21 for air filtering, and the environmental parameter is displayed through the LED display 14. The infrared sensor 8 acquires a panoramic image of a scene, whether an abnormal position exists or not is judged, and the millimeter wave radar sensor 9 acquires scene personnel information. If someone in the bathroom, microprocessor 6 starts voice prompt and sends voice prompt, and the time keeps 8 seconds, and if the environmental parameter concentration that detects lasts and increases after 5 seconds, audible-visual annunciator takes place alarm information, and the bright red light of LED display screen 14 glimmers, and the environmental parameter that field personnel accessible LED display screen 14 showed can find out the warning problem point fast and solve, and alarm signal drops to normal scope automatic stop until environmental parameter concentration. If no person exists in the toilet, the microprocessor 6 feeds back information to the video monitoring device through the zigbee module 12, the video monitoring device is started, the video monitoring device gives an alarm through sound in the first step, and the time is kept for 8 seconds; secondly, alarming by red light flashing for 8 seconds; and thirdly, sending the video to a room with people, and giving an alarm through the video, if no people are in the room, networking and sending the information to the communication equipment, so that the function of reminding the family is achieved, and the intelligent control system closes the gas valve, thereby being beneficial to avoiding carbon monoxide poisoning accidents of personnel.
EXAMPLE III
The embodiment adopts the same mode as the first embodiment, and the difference is that the intelligent smoke alarm is arranged in an indoor hall or bedroom close to a wallCorner, gas concentration response threshold set to 5LEL, smoke concentration response threshold set to 5% OBS/M, carbon monoxide concentration response threshold set to 120ppm, PM2.5 response threshold set to 30 μ g/M3The ambient temperature response threshold is 50 deg.. The microprocessor 6 displays the acquired environmental parameters through the LED display screen 14, if any one or more concentrations of the environmental parameters are larger than the response threshold value, the microprocessor 6 sends information to a terminal client through the zigbee module 12, the microprocessor 6 starts the air filtering device 21 to filter air, the infrared sensor 8 acquires a panoramic image of a scene, whether an abnormal position exists or not is judged, and the millimeter wave radar sensor 9 acquires scene personnel information. If someone is in the scene, microprocessor 6 starts voice prompt and sends voice prompt, and the time keeps 5 seconds, and if the environmental parameter concentration that detects lasts to increase after 5 seconds, audible-visual annunciator takes place alarm information, and LED display screen 14 is bright red light and is glimmered, and the environmental parameter that field personnel accessible LED display screen 14 show finds out the warning problem point fast and solves, and alarm signal drops to normal scope automatic stop until environmental parameter concentration. If no personnel exist in the site, the microprocessor 6 feeds information back to the video monitoring device through the zigbee module 12, the video monitoring device is started, the video monitoring device gives an alarm through sound in the first step, and the time is kept for 5 seconds; secondly, alarming by red light flashing for 5 seconds; and thirdly, the video is sent to a room with people, if no people exist in the room, the networking is sent to the communication equipment through information, the function of family reminding is played, and the intelligent control system closes the gas valve, so that fire safety accidents are avoided.
Furthermore, the lower shell of the intelligent smoke alarm provided by the invention is also provided with a standby power supply, the standby power supply adopts a lithium iron phosphate battery, the intelligent smoke alarm can still normally work when the power is off and the network is disconnected, and the millimeter wave radar sensor 9 adopts a 24GHz millimeter wave radar.
The working principle is as follows:
the microprocessor 6 of the invention displays the collected environmental parameters through the LED display screen 14, if any one or more concentrations of the environmental parameters are greater than the preset response threshold, the microprocessor 6 sends information to a terminal client through the zigbee module 12, the microprocessor 6 starts the air filtering device 21 for air filtering, the infrared sensor 8 acquires a panoramic image of a scene, an abnormal position is judged according to the thermal imaging principle, the millimeter wave radar sensor 9 acquires scene personnel information, whether the personnel action direction faces the abnormal position is judged, and according to the personnel action direction, the alarm mode is as follows: when the action direction of the personnel faces to the abnormal position and is 1.2-3 meters away from the abnormal position, the smoke alarm does not generate alarm information, and if the abnormal position within the range of 1.2-3 meters of the personnel still exists after 8-15 seconds, a voice prompter is sent to the personnel on site to alarm until the abnormal position disappears; after 8-15 seconds, if the abnormal positions of the personnel within the range of 1.2-3 meters are increased, an audible and visual alarm signal is sent until the abnormal positions disappear; and when the action direction of the personnel is not towards the abnormal position, sending a voice prompting device alarm to the personnel on site, and keeping the time for 5-10 seconds. The intelligent smoke alarm can be interconnected with an indoor original video monitoring device through the zigbee module, or connected with an intelligent household control system and the video monitoring device through networking. When no personnel information exists in the scene, the video monitoring device is utilized, and the alarm mode is as follows: the microprocessor 6 sends the abnormal information to the video monitoring device, starts the video monitoring device, gives an alarm through voice prompt in the first step, and keeps the time for 5 to 10 seconds; secondly, alarming by red light flashing of a video monitoring display device for 5 to 10 seconds; and thirdly, giving an alarm through video by sending the video to a room where people exist. By utilizing the intelligent home control system, the alarm mode is as follows: the microprocessor 6 sends the abnormal information to the intelligent home control system, automatically dials an alarm receiving center number and an alarm call preset by the user or sends a short message to the user through the intelligent home system, and simultaneously starts a corresponding fire-fighting emergency scheme.
Claims (2)
1. A smoke alarm method, characterized by: the smoke alarm method comprises the following steps:
acquiring signals of a smoke sensor (7), a carbon monoxide detector (10) and a laser PM2.5 particle sensor (11) through a microprocessor (6) to acquire environmental parameter information in a scene, wherein the environmental parameter information comprises one or more of gas concentration, smoke concentration, carbon monoxide concentration, air PM value and environmental temperature parameter;
when the environmental parameter information reaches a preset response threshold value, an infrared sensor (8) acquires a scene image, a millimeter wave radar sensor (9) acquires scene personnel information, a microprocessor (6) starts an air purification device (21), and the preset response threshold value comprises the following steps: the response threshold of gas concentration is 5-50% LEL, the response threshold of smoke concentration is 5% OBS/M-15% OBS/M, the response threshold of carbon monoxide concentration is 120ppm-250ppm, and PM2.5 is less than 75 mu g/M3The ambient temperature response threshold is 50-70 degrees;
determining the action direction of scene personnel in the scene image according to the scene image and the scene personnel information, and judging whether the action direction of the personnel faces to an abnormal position; wherein the abnormal position is determined according to a hidden ignition point or an ignition point found by thermal imaging of the infrared sensor (8);
according to the action direction of the personnel, the alarm mode is as follows:
when the action direction of the personnel faces to an abnormal position and is 1.2-3 meters away from the abnormal position, no alarm information is generated, and after 8-15 seconds, if the abnormal position within the range of 1.2-3 meters of the personnel still exists, a voice prompt alarm is sent to the personnel on site until the abnormal position disappears; after 8-15 seconds, if the abnormal positions of the personnel within the range of 1.2-3 meters are increased, an alarm signal is sent until the abnormal positions disappear;
and when the action direction of the personnel is not towards the abnormal position, sending voice prompt alarm to the personnel on site, and keeping the time for 5-10 seconds.
2. A smoke alarm method according to claim 1, wherein: when no personnel information exists in the scene, the alarm mode is as follows:
the microprocessor (6) sends the abnormal information to the video monitoring device, starts the video monitoring device, gives an alarm through voice prompt in the first step, and keeps the time for 5-10 seconds; secondly, alarming by red light flashing of a video monitoring display device for 5-10 seconds; thirdly, sending a video to a room where a person is in and giving an alarm through the video;
the video alarm is sent to the video monitoring device by the microprocessor (6), and the system can remind an alarm through video picture flicker and sound in a room with people;
the microprocessor (6) can also send information to the networked communication equipment through the zigbee module (12) to play a role in reminding family members.
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