CN108711250B - Smoke alarm device based on single chip microcomputer - Google Patents
Smoke alarm device based on single chip microcomputer Download PDFInfo
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- CN108711250B CN108711250B CN201810701247.4A CN201810701247A CN108711250B CN 108711250 B CN108711250 B CN 108711250B CN 201810701247 A CN201810701247 A CN 201810701247A CN 108711250 B CN108711250 B CN 108711250B
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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Abstract
The invention relates to a smoke alarm device based on a single chip microcomputer, which comprises the single chip microcomputer, a smoke sensor (3) connected to the input end of the single chip microcomputer, an alarm connected to the output end of the single chip microcomputer, an exhaust fan (6) and a water sprayer (7), wherein the smoke sensor (3) is used for detecting smoke concentration and transmitting a smoke concentration signal to the single chip microcomputer, the single chip microcomputer controls the alarm to send out an alarm signal when the smoke concentration exceeds the standard, the exhaust fan (6) is started, a timer is triggered to start timing work, and the water sprayer (7) is started when the alarm signal is maintained to reach the preset timing time. Compared with the prior art, the fire extinguishing system has the advantages of powerful functions, alarm function, fire extinguishing function and strong expansibility.
Description
Technical Field
The invention relates to the technical field of smoke alarm, in particular to a smoke alarm device based on a single chip microcomputer.
Background
The smoke detector is also called as a smoke-sensitive fire detector, is mainly applied to a fire-fighting system and also applied to the construction of a security system. It is a typical equipment that turns from space fire protection to civil use. The smoke detector realizes fire prevention mainly by monitoring smoke concentration, the ion type smoke sensor is adopted in the smoke detector, the ion type smoke sensor is a sensor with advanced technology and stable and reliable work, is widely applied to various fire alarm systems, and has far better performance than a gas sensitive resistor type fire alarm. The product is suitable for fire alarm in house, shop, dance hall, warehouse, etc. The process of fire is generally accompanied by smoke, heat and light. In the initial stage of a fire, since the temperature is low, substances are mostly in a smoldering stage, and therefore, a large amount of smoke is generated. Smoke is one of the important characteristics of early fires, and smoke-sensitive fire detectors have been developed using this characteristic to respond to visible or invisible smoke particles. The smoke concentration change at the detection part is converted into an electric signal to realize the purpose of alarming. However, the smoke detection alarm often causes false alarm in actual household environment, and is mostly caused by smoke generated by cigarettes or oil smoke generated by using a kitchen. Secondly, the current smoke alarm has single function, and the application range is greatly limited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a smoke alarm device based on a single chip microcomputer.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a smog alarm device based on singlechip, includes the singlechip, connects in the smoke transducer of singlechip input and connects in alarm, exhaust fan and the sprinkling machine of singlechip output, smoke transducer be used for detecting smog concentration and carry smog concentration signal to the singlechip, the singlechip controls the alarm and sends alarm signal when smog concentration exceeds standard, starts the exhaust fan to trigger the time-recorder and begin the timing work, alarm signal maintains when presetting the timekeeping, starts the sprinkling machine.
The device has powerful functions, and not only has the alarm function, but also has the fire extinguishing function. Based on the fact that the false alarm of the smoke alarm is caused by smoke generated by cigarettes or oil smoke generated by a kitchen under most conditions, the smoke alarm is provided with the exhaust fan, the delay mechanism is introduced, once the smoke sensor detects that the smoke concentration exceeds the standard, the alarm is triggered, if the false alarm is caused by smoking or kitchen oil smoke, related personnel stop related operation (extinguishes the cigarettes or stops cooking) once the alarm is detected, no smoke is generated, and the smoke concentration is reduced because the exhaust fan exhausts the smoke, so that the smoke concentration can reach the standard level within the preset timing time (for example, 1 minute) by selecting the proper exhaust fan, and the alarm does not respond any more when the timing time is up, and water is not required to be sprayed. If the alarm is caused by fire, particularly under the condition that no one is at home, the alarm responds for the preset timing time, and then the sprinkler operates to spray water to extinguish fire.
Preferably, the input end of the single chip microcomputer is further connected with the household range hood and used for enabling the single chip microcomputer to acquire working state signals of the range hood and shielding input signals of the smoke sensor when the range hood works.
Because the oil smoke during cooking is very easy to start the smoke alarm, and in practice, the cooking process is very difficult to stop, therefore, when the smoke exhaust ventilator works, the smoke alarm signal is shielded, and the cooking work is ensured while the false alarm is effectively reduced.
Preferably, the singlechip be AT89C51 type singlechip, including mainboard and chip, smoke transducer, alarm, exhaust fan and sprinkler connect on the mainboard.
Preferably, the smoke sensor is an MQ-2 smoke sensor.
Preferably, the alarm comprises a buzzer and a water lamp.
The invention not only gives out sound alarm through the buzzer, but also gives out light flash alarm through the running water lamp. The alarm form is various, and is more reliable.
Preferably, the device also comprises a temperature sensor and a humidity sensor which are connected with the input end of the singlechip and a liquid crystal display which is connected with the output end of the singlechip.
The invention can display information such as time, temperature, moderate degree, smoke concentration and the like on the liquid crystal display in real time, ensures the real-time monitoring of relevant conditions, further expands the functions and is convenient for users to use.
Preferably, the liquid crystal display is an LCD1602 liquid crystal display.
Preferably, the single chip microcomputer is further connected with a communication module for sending information to the terminal and receiving a terminal instruction.
Preferably, the communication module comprises a WIFI communication module or/and a 4G communication module.
Through setting up communication module, can conveniently convey the information of the device to the terminal station (for example cell-phone), make things convenient for the user remote monitoring relevant information, also make things convenient for the terminal station to send the instruction to the device.
Compared with the prior art, the invention has the following beneficial effects:
(1) powerful not only possesses alarming function, still possesses the function of putting out a fire.
(2) The condition that the water sprayer is started by mistake due to oil smoke generated by smoking or cooking can be effectively avoided.
(3) The expansion function is strong, and the singlechip, smoke alarm etc. that adopt all possess good encodable performance, can compile different function sentences through the extended function module and realize more functions.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the figure, 1 is a main board, 2 is a chip, 3 is a smoke sensor, 4 is a buzzer, 5 is a water lamp, 6 is an exhaust fan, 7 is a water sprayer, and 8 is a liquid crystal display.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
The utility model provides a smog alarm device based on singlechip, as shown in figure 1, include the singlechip, connect in the smoke transducer 3 of singlechip input and connect in alarm, exhaust fan 6 and the sprinkler 7 of singlechip output, smoke transducer 3 be used for detecting smog concentration and carry smog concentration signal to the singlechip, the singlechip controls the alarm and sends alarm signal when smog concentration exceeds standard, starts exhaust fan 6 to trigger the timer and begin timing work, alarm signal maintains to preset timing time then, starts sprinkler 7.
Based on the fact that the false alarm of the smoke alarm is caused by smoke generated by cigarettes or oil smoke generated by a kitchen under most conditions, the smoke alarm is provided with the exhaust fan and a delay mechanism is introduced, once the smoke sensor 3 detects that the smoke concentration exceeds the standard, the alarm is triggered, if the false alarm is caused by smoking or kitchen oil smoke, related personnel stop related operations (extinguish the cigarettes or stop cooking) once the relevant personnel detect the alarm, smoke is not generated, and the smoke concentration is reduced because the exhaust fan 6 exhausts the smoke, so that the smoke concentration can reach the standard level within the preset timing time (for example, 1 minute) by selecting the proper exhaust fan 6, and the alarm does not respond any more when the timing time is up, and water is not required to be sprayed. If the alarm is caused by fire, particularly under the condition that no one is at home, the alarm responds for the preset timing time, and then the water sprayer 7 sprays water to extinguish the fire.
Because the oil smoke during cooking is very easy to set out the smoke alarm, and in practice, the cooking process is very difficult to suspend, therefore, the input end of the singlechip of this embodiment is also connected with the household range hood, and is used for enabling the singlechip to acquire the working state signal of the range hood and shielding the input signal of the smoke sensor 3 when the range hood works. When the range hood works, the smoke alarm signal is shielded, false alarm is effectively reduced, and cooking work is guaranteed while water is sprayed by mistake.
The device also comprises a temperature sensor and a humidity sensor which are connected with the input end of the single chip microcomputer and a liquid crystal display 8 which is connected with the output end of the single chip microcomputer. The real-time display of information such as time, temperature, moderation, smoke concentration and the like on the liquid crystal display is realized, the real-time monitoring of relevant conditions is guaranteed, the functions are further expanded, and the use by a user is facilitated.
The singlechip of this embodiment is AT89C51 type singlechip, including mainboard 1 and chip 2, smoke transducer 3, alarm, exhaust fan 6 and sprinkler 7 connect on mainboard 1. The smoke sensor 3 is an MQ-2 smoke sensor. The alarm comprises a buzzer 4 and a water lamp 5. The liquid crystal display 8 is an LCD1602 liquid crystal display.
The MQ-2 smoke sensor selected in this embodiment is a semiconductor sensor, and is an N-type semiconductor gas sensor mainly composed of metal oxide tin dioxide (SnO2) with low conductivity in clean air. As the concentration of smoke in the air increases, the conductivity of the sensor increases. The MQ-2 sensor has the advantages of a common semiconductor smoke sensor, such as strong anti-interference capability, large output signal, high sensitivity, short response and recovery time, large conductivity change, stable operation, long service life and the like, and has very high sensitivity and good selectivity to carbon monoxide, long service life and reliable stability.
When the analog electric signal processing circuit works, the smoke signal acquisition and amplification circuit converts the acquired smoke concentration information into an amplified analog electric signal. The analog-to-digital conversion circuit converts the analog electric signal into a digital signal which can be recognized by the singlechip and then sends the digital signal into the singlechip. The single chip microcomputer processes the digital signal and analyzes the processed data. When the amplified signal input into the A/D converter is not zero, an alarm is started. Otherwise, the working state is normal. In the design, in order to facilitate detection and monitoring, instrument testers and users can indirectly know the smoke concentration in the environment, so that the alarm state is indicated by using a nixie tube to display characters. The system adopts buzzer sound alarm and LED flashing state as alarm signals. The alarm method is to add a light flash alarm on the basis of sound alarm. Because the changed light signal can attract the attention of the user and the family neighbors, the limitation of sound alarm in a noisy environment is made up, and the alarm device is more complete. When the alarm is started, the single chip microcomputer controller also controls the exhaust fan to perform smoke exhaust action and spray water to extinguish fire under a proper condition. In addition, since the smoke sensor needs to operate in a heated state, the higher the temperature, the faster the reaction, and the faster the response time and recovery time. In order to improve the response time and ensure the accurate and stable operation of the sensor, the alarm needs to continuously output a voltage of 5V to the smoke sensor. In order to ensure the reliability, the failure detection is performed while outputting a voltage of 5V. And when the sensor heating wire or the cable wire and the sensor are broken or in poor contact, performing fault alarm.
In order to realize remote monitoring and control, the device of the embodiment can also be connected with a communication module on the singlechip, and is used for sending information to the terminal and receiving a terminal instruction. The communication module can be a WIFI communication module or/and a 4G communication module.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (3)
1. A smoke alarm device based on a single chip microcomputer is characterized by comprising the single chip microcomputer, a smoke sensor (3) connected to the input end of the single chip microcomputer, an alarm, an exhaust fan (6) and a water sprayer (7) connected to the output end of the single chip microcomputer, wherein the smoke sensor (3) is used for detecting smoke concentration and transmitting a smoke concentration signal to the single chip microcomputer, the single chip microcomputer controls the alarm to send an alarm signal when the smoke concentration exceeds a standard, the exhaust fan (6) is started, a timer is triggered to start timing work, and the water sprayer (7) is started when the alarm signal is maintained to reach a preset timing time;
the input end of the single chip microcomputer is also connected with the household range hood and used for enabling the single chip microcomputer to acquire working state signals of the range hood and shielding input signals of the smoke sensor (3) when the range hood works;
the single chip microcomputer is an AT89C51 type single chip microcomputer and comprises a main board (1) and a chip (2), and the smoke sensor (3), the alarm, the exhaust fan (6) and the water sprayer (7) are connected to the main board (1);
the single chip microcomputer is also connected with a communication module for sending information to a terminal and receiving a terminal instruction, and the communication module comprises a WIFI communication module or/and a 4G communication module;
the smoke sensor (3) is an MQ-2 smoke sensor;
the device also comprises a temperature sensor and a humidity sensor which are connected with the input end of the singlechip and a liquid crystal display (8) which is connected with the output end of the singlechip.
2. The smoke alarm device based on the single chip microcomputer of claim 1, wherein the alarm comprises a buzzer (4) and a water lamp (5).
3. The smoke alarm device based on the single chip microcomputer as claimed in claim 1, wherein said liquid crystal display (8) is an LCD1602 liquid crystal display.
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| CN201810701247.4A CN108711250B (en) | 2018-06-29 | 2018-06-29 | Smoke alarm device based on single chip microcomputer |
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| CN201810701247.4A CN108711250B (en) | 2018-06-29 | 2018-06-29 | Smoke alarm device based on single chip microcomputer |
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| CN108711250B true CN108711250B (en) | 2020-12-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917715A (en) * | 2019-03-28 | 2019-06-21 | 河海大学常州校区 | A kind of control of sound effect and warning device |
| CN110176122A (en) * | 2019-07-08 | 2019-08-27 | 刘忠辉 | A kind of multi-functional monitor alarm for fire accident |
| CN111445679A (en) * | 2020-05-15 | 2020-07-24 | 上海金盾消防智能科技有限公司 | Multi-channel communication multi-address point location fire alarm controller |
| CN111544799A (en) * | 2020-05-26 | 2020-08-18 | 杨平峰 | Automatic temperature control and smoke control intelligent fire extinguishing system |
| CN112185053A (en) * | 2020-10-27 | 2021-01-05 | 赖圣利 | Fire-fighting energy-saving alarm |
| CN112700616B (en) * | 2020-12-16 | 2022-12-16 | 陕西卓为信息技术有限公司 | Security alarm |
| CN113436405B (en) * | 2021-07-13 | 2023-03-28 | 深圳市创景科技发展有限公司 | Fire alarm and fire extinguishing device |
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