CN104751590A - Single-chip microcomputer based smoke alarm and alarm method thereof - Google Patents
Single-chip microcomputer based smoke alarm and alarm method thereof Download PDFInfo
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- CN104751590A CN104751590A CN201310736336.XA CN201310736336A CN104751590A CN 104751590 A CN104751590 A CN 104751590A CN 201310736336 A CN201310736336 A CN 201310736336A CN 104751590 A CN104751590 A CN 104751590A
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- alarm
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- concentration
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- scm based
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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)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
Provided is a single-chip microcomputer based smoke alarm and an alarm method thereof. In the prior art, once a single-chip microcomputer is in an endless-loop state, an alarm cannot work normally, and hidden safety troubles occur. The smoke alarm is composed of a smoke sensor (1) and a concentration sensor (2), the smoke sensor and the concentration sensor are mounted outside a casing (3), the casing internally includes a prepositioned amplification circuit (4), the prepositioned amplification circuit is connected with an A/D converter (5), the A/D converter is connected with a central processor (6), the central processor is connected with a display circuit (7), a volume adjusting circuit (8) and a button control circuit (9), and the volume adjusting circuit and the display circuit are connected with a sound alarm circuit (10). The alarm and method are used for smoke alarming.
Description
technical field:
the present invention relates to a kind of SCM Based smoke alarm and alarm method.
background technology:
along with the development of science and technology, more and more huge hidden danger produces due to commercial production and daily life.In order to early detection and circular fire, prevent and reduce fire hazard, the protection person and property safety.Defendance socialist modernization drive, prevents fire from causing the accidents such as burning, blast, causes serious economic loss, even threat to life safety.
in order to reduce the generation of this kind of accident, just must carry out scene to smog and detecting in real time, adopt advanced safety detection instrument reliably, in tight monitoring of environmental, the concentration of smog, finds accident potential early, adopts an effective measure, avoid accident to occur, just can guarantee industrial safety and family life safety.Therefore, detection method and the development smoke alarm of research smog,
once there is endless loop state in the single-chip microcomputer in the smoke alarm of current use, alarm just cannot normally work, and can bring people and bring potential safety hazard.
summary of the invention:
the object of this invention is to provide a kind of SCM Based smoke alarm and alarm method.
above-mentioned object is realized by following technical scheme:
a kind of SCM Based smoke alarm, its composition comprises: smoke transducer, concentration sensor, described smoke transducer, concentration sensor are arranged on outside, the inside of described housing has pre-amplification circuit, described pre-amplification circuit is connected with A/D converter, described A/D converter is connected with central processing unit, described central processing unit is connected with display circuit, volume control circuit, key control circuit, volume control circuit respectively, and described volume control circuit is connected with audible alarm circuit.
described SCM Based smoke alarm, described housing have concentration display screen, status indicator lamp, control button, described concentration display screen, described status indicator lamp are connected with described display circuit respectively, and described control button is connected with described key control circuit.
described SCM Based smoke alarm, described central processing unit is single-chip microcomputer, and the model of described single-chip microcomputer is STC12C5410AD.
described SCM Based smoke alarm, described central processing unit is connected with watchdog circuit.
described SCM Based smoke alarm, described smoke transducer is MQ-2 type smoke transducer.
a kind of alarm method utilizing above-mentioned SCM Based smoke alarm, first the method comprises the steps:, small voltage signal corresponding to the smokescope sent here of sensor, through amplifying, changes into larger voltage signal and sends into STC12C5410AD single-chip microcomputer; Then, in STC12C5410AD single-chip microcomputer, A/D conversion, concentration compare, and carry out linearization process to data, digitized voltage signal are transformed into corresponding decimal system concentration value; Finally, actual inflammable gas concentration is sent into liquid crystal, and judges whether concentration value exceeds alarm limit, when concentration, to be in normal condition green light long bright, when smokescope exceeds the limit value of setting, sounds and to report to the police and with red lamp flass.
beneficial effect:
1. the present invention needs to work in a heated state due to smoke transducer, and temperature is higher, reacts faster, the response time and release time faster.For improving the response time, ensure that sensor works exactly, stably, alarm needs the voltage continuing an output 5V to smoke transducer.In order to ensure its reliability, while the voltage exporting 5V, carry out malfunction monitoring.When sensor heater strip or cable and sensor broken string or loose contact, carry out fault alarm, send sound and light alarm signal.Ensure that the safety of product.
the present invention take single-chip microcomputer as core, coordinates the functions such as the common settling signal collection of peripheral circuit, concentration display, time showing, state display, sound and flicker warning, key-press input, fault self-checking.Alarm adopts the working method of patrolling and examining, and carries out the setting of two-stage alarming value, and sends different light, acoustical signal.System should adopt high performance single-chip microcomputer, requires that working stability, measuring accuracy are high, highly versatile, low in energy consumption, and ensure accuracy and the reliability of alarm, and preferably volume is little, cost is low, is conducive to the volume reducing alarm, reduces the cost of alarm.
the present invention has Self-fault diagnosis warning function, and when the situation of broken string or loose contact occurs for sensor heater strip or cable, alarm gives the alarm, and yellow indicator lamp glimmers, reminding user checks sensor or circuit linear contact lay situation, fixes a breakdown in time, ensures safety.
the present invention has smokescope Presentation Function, the concentration value of flammable smog is shown by liquid crystal display, and can be switched to the state of setting, arranged or change alarm limits by keyboard, so that user or testing staff observe smokescope and change alarm limit at any time.
the present invention has function of smoking alarm, and when smokescope continuous 20 seconds values are all on alarm limits, hummer starts to report to the police, and sound is more and more rapid, and with blinking red lamp.Because the signal of people to change is more responsive, so the sound of change and light more easily cause the attention of user.
the present invention has and prevents alarm wrong report function, and it is the leakage of flammable smog in pipeline that quick duplicate detection and delayed alarm can distinguish, or scattering and disappearing due to micro-smog when opening valve.
the present invention has house dog self-inspection single-chip microcomputer status function, calls the house dog program in single-chip microcomputer, quantitative check single-chip microcomputer duty, once find that endless loop state appears in single-chip microcomputer, resets immediately, ensures that alarm work is normal.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is circuit theory diagrams of audible alarm circuit in accompanying drawing 1.
accompanying drawing 3 is circuit theory diagrams of pre-amplification circuit in accompanying drawing 1.
embodiment:
embodiment 1:
a kind of SCM Based smoke alarm, its composition comprises: smoke transducer 1, concentration sensor 2, it is outside that described smoke transducer, concentration sensor are arranged on housing 3, the inside of described housing has pre-amplification circuit 4, described pre-amplification circuit is connected with A/D converter 5, described A/D converter is connected with central processing unit 6, described central processing unit is connected with display circuit 7, volume control circuit 8, key control circuit 9 respectively, and described volume control circuit, described display circuit are connected with audible alarm circuit 10.
embodiment 2:
sCM Based smoke alarm according to embodiment 1, described housing have concentration display screen, status indicator lamp, control button, described concentration display screen, described status indicator lamp are connected with described display circuit respectively, and described control button is connected with described key control circuit.
embodiment 3:
sCM Based smoke alarm according to embodiment 1 or 2, described central processing unit is single-chip microcomputer, and the model of described single-chip microcomputer is STC12C5410AD.
embodiment 4:
sCM Based smoke alarm according to embodiment 1 or 2 or 3, described central processing unit is connected with watchdog circuit 11.
embodiment 5:
sCM Based smoke alarm according to embodiment 1 or 2 or 3 or 4, described smoke transducer is MQ-2 type smoke transducer.
embodiment 6:
a kind of alarm method of the SCM Based smoke alarm utilizing one of embodiment 1-5 described, first the method comprises the steps:, small voltage signal corresponding to the smokescope sent here of sensor, through amplifying, changes into larger voltage signal and sends into STC12C5410AD single-chip microcomputer; Then, in STC12C5410AD single-chip microcomputer, A/D conversion, concentration compare, and carry out linearization process to data, digitized voltage signal are transformed into corresponding decimal system concentration value; Finally, actual inflammable gas concentration is sent into liquid crystal, and judges whether concentration value exceeds alarm limit, when concentration, to be in normal condition green light long bright, when smokescope exceeds the limit value of setting, sounds and to report to the police and with red lamp flass.
Claims (6)
1. a SCM Based smoke alarm, its composition comprises: smoke transducer, concentration sensor, it is characterized in that: described smoke transducer, concentration sensor are arranged on outside, the inside of described housing has pre-amplification circuit, described pre-amplification circuit is connected with A/D converter, described A/D converter is connected with central processing unit, described central processing unit is connected with display circuit, volume control circuit, key control circuit, volume control circuit respectively, and described volume control circuit is connected with audible alarm circuit.
2. SCM Based smoke alarm according to claim 1, it is characterized in that: described housing has concentration display screen, status indicator lamp, control button, described concentration display screen, described status indicator lamp are connected with described display circuit respectively, and described control button is connected with described key control circuit.
3. SCM Based smoke alarm according to claim 1 and 2, is characterized in that: described central processing unit is single-chip microcomputer, and the model of described single-chip microcomputer is STC12C5410AD.
4. the SCM Based smoke alarm according to claim 1 or 2 or 3, is characterized in that: described central processing unit is connected with watchdog circuit.
5. the SCM Based smoke alarm according to claim 1 or 2 or 3 or 4, is characterized in that: described smoke transducer is MQ-2 type smoke transducer.
6. the method utilizing the carrying out of the SCM Based smoke alarm of one of claim 1-5 to report to the police, it is characterized in that: first the method comprises the steps:, small voltage signal corresponding to the smokescope sent here of sensor, through amplifying, changes into larger voltage signal and sends into STC12C5410AD single-chip microcomputer; Then, in STC12C5410AD single-chip microcomputer, A/D conversion, concentration compare, and carry out linearization process to data, digitized voltage signal are transformed into corresponding decimal system concentration value; Finally, actual inflammable gas concentration is sent into liquid crystal, and judges whether concentration value exceeds alarm limit, when concentration, to be in normal condition green light long bright, when smokescope exceeds the limit value of setting, sounds and to report to the police and with red lamp flass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310736336.XA CN104751590A (en) | 2013-12-29 | 2013-12-29 | Single-chip microcomputer based smoke alarm and alarm method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310736336.XA CN104751590A (en) | 2013-12-29 | 2013-12-29 | Single-chip microcomputer based smoke alarm and alarm method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104751590A true CN104751590A (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310736336.XA Withdrawn CN104751590A (en) | 2013-12-29 | 2013-12-29 | Single-chip microcomputer based smoke alarm and alarm method thereof |
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| Country | Link |
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| CN (1) | CN104751590A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105354973A (en) * | 2015-10-26 | 2016-02-24 | 珠海格力电器股份有限公司 | Circuit board autonomous fire prevention method and system, circuit board and electronic device |
| CN108022407A (en) * | 2017-11-30 | 2018-05-11 | 徐州泰华电子科技有限公司 | A kind of sensor for smoke detection |
| CN109816919A (en) * | 2017-11-18 | 2019-05-28 | 长沙鲁维湘机电科技有限公司 | A kind of Smoke Detection alarm system using single-chip microcontroller |
-
2013
- 2013-12-29 CN CN201310736336.XA patent/CN104751590A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105354973A (en) * | 2015-10-26 | 2016-02-24 | 珠海格力电器股份有限公司 | Circuit board autonomous fire prevention method and system, circuit board and electronic device |
| CN109816919A (en) * | 2017-11-18 | 2019-05-28 | 长沙鲁维湘机电科技有限公司 | A kind of Smoke Detection alarm system using single-chip microcontroller |
| CN108022407A (en) * | 2017-11-30 | 2018-05-11 | 徐州泰华电子科技有限公司 | A kind of sensor for smoke detection |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150701 |