CN206696996U - A kind of compound flame detection device - Google Patents
A kind of compound flame detection device Download PDFInfo
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- CN206696996U CN206696996U CN201720447642.5U CN201720447642U CN206696996U CN 206696996 U CN206696996 U CN 206696996U CN 201720447642 U CN201720447642 U CN 201720447642U CN 206696996 U CN206696996 U CN 206696996U
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Abstract
The utility model discloses a kind of compound flame detection device, and infrared acquisition and ultraviolet detection are combined by it, and infrared signal and UV signal are analyzed and processed using same CPU, extract the exclusive feature of flare up fire.Because infrared acquisition and ultraviolet detection operation principle are each advantageous, infrared acquisition and the wave band of ultraviolet detection impression are in different sections, Ultraviolet sensor and infrared sensor characteristic are different, by two kinds of detection modes it is compound, maximize favourable factors and minimize unfavourable ones, the advantage using both, not only overcome the deficiency that traditional infrared flame detection device is easily produced wrong report by temperature, vibration influence, the deficiency that ultraviolet flame detection device is easily disturbed by sunshine, electric welding light is also overcomed, the functional reliability of flame detection device can be effectively improved.
Description
Technical field
Fire-fighting domain is the utility model is related to, specifically a kind of flame detection device.
Background technology
Flame detection device generally comprises flame detector and CPU, and flame detector and CPU are commonly mounted on a circuit board
On, during work, flame information is gathered by flame detector, CPU determines whether that flare up fire is present according to this flame information.
The conventional flame detection device of existing fire system has two kinds, and a kind of is that the infra red flame based on infrared sensor is visited
Device is surveyed, another kind is the ultraviolet flame detection device based on Ultraviolet sensor, and people are according to can need to select infra red flame spy
Survey device or ultraviolet flame detection device is used.
Infra red flame detection device is detected by the use of infrared sensor as front end, optical signal is converted into electric signal, then
Electric signal is amplified, CPU determines whether that flare up fire is present according to the size of this electric signal.Circuit belongs to putting for small-signal
Greatly, analyze feature it is single, and flare up fire be exaggerated while, interference signal is also exaggerated, and infrared sensor hold
It is vulnerable to temperature, the influence of vibrations, therefore often has wrong report phenomenon.
Ultraviolet flame detection device Ultraviolet sensor work when be by analyzing UV185-260nm spectrum,
Because sunshine spectrum also includes this wave band, electric welding light spectrum also includes this wave band, therefore, using single ultraviolet detection
Flame detection device is easily reported by mistake to generations such as sunshine, electric welding light.
Utility model content
The purpose of this utility model is to provide a kind of compound flame detection device, and it can effectively improve flame detection device
Functional reliability.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of compound flame detection device, including infra red flame detection circuit, ultraviolet flame detection circuit and CPU, institute
The output end for stating infra red flame detection circuit and the ultraviolet flame detection circuit is connected to the corresponding input of the CPU
End, the output end of the CPU is the output end of flame detection device；
The infra red flame detection circuit, the ultraviolet flame detection circuit and the CPU are installed on a circuit board jointly
On；
The ultraviolet flame detection circuit includes the booster circuit being sequentially connected, ultraviolet light sensing tube and its drive circuit, arteries and veins
Broadening and shaping circuit, and pulse frequency discriminator circuit, the input connection 5V power supplys of booster circuit are rushed, pulse frequency differentiates
The output end of circuit is fire alarm output end.
The DC voltage booster circuit that it is DC300V by DC5V photovoltaic conversions that the booster circuit, which is, for providing the ultraviolet light
The operating voltage of quick pipe.
The ultraviolet light sensing tube and its drive circuit export sawtooth signal.
The sawtooth signal is converted into the square wave of one fixed width by the pulse stretching and shaping circuit.
The pulse frequency discriminator circuit includes 555 timers and its peripheral circuit and counter, 555 timer
Output end is connected to the reset terminal of the counter, and the output end of the pulse stretching and shaping circuit is connected to the counter
Input, the output end of the counter is fire alarm output end.
After such scheme, the compound flame detection device of the utility model, infrared acquisition is mutually tied with ultraviolet detection
Close, infrared signal and UV signal are analyzed and processed using same CPU, extract the exclusive feature of flare up fire.Due to
Infrared acquisition and ultraviolet detection operation principle are each advantageous, and the wave band of infrared acquisition and ultraviolet detection impression is in different sections,
Ultraviolet sensor and infrared sensor characteristic are different, by two kinds of detection modes it is compound, maximize favourable factors and minimize unfavourable ones, utilize both excellent
Gesture, the deficiency that traditional infrared flame detection device is easily produced wrong report by temperature, vibration influence is not only overcome, also overcomes purple
The deficiency that outer flame detection device is easily disturbed by sunshine, electric welding light, the reliable operation of flame detection device can be effectively improved
Property.
Because flare up fire and sun optical signal, electric welding optical signal are all there is ultraviolet, therefore ultraviolet detector is easy
Disturbed by sunshine, produce wrong report, in order to identify flare up fire, the utility model spy devises pulse frequency discriminator circuit.By
It is inconsistent in the frequency of flare up fire and sun optical signal or electric welding optical signal generation sawtooth signal, therefore, pulse frequency mirror
Cycle timing is carried out using 555 timers in other circuit, when the square wave of pulse stretching in a period of time and shaping circuit output
Umber of pulse is not reaching to setting value, then judges that this pulse signal (square wave) nonflame signal produces, 555 timers output high level
Reset clearing is carried out to counter, if umber of pulse reaches setting value in a period of time, counter works, exports fire alarm.
The utility model can effectively prevent sun optical signal or be welded the interference of optical signal by setting pulse frequency discriminator circuit.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the schematic block circuit diagram of ultraviolet flame detection circuit in Fig. 1.
Fig. 3 is the circuit theory diagrams of booster circuit in Fig. 2.
Fig. 4 is the circuit theory diagrams of ultraviolet light sensing tube and its drive circuit in Fig. 2.
Fig. 5 is the circuit theory diagrams of pulse stretching and shaping circuit in Fig. 2.
Fig. 6 is the circuit theory diagrams of pulse frequency identification circuit in Fig. 2.
Embodiment
The compound flame detection device of the utility model, as shown in figure 1, including infra red flame detection circuit 1, ultraviolet flame
The output end of detection circuit 2 and CPU 3, the infra red flame detection circuit 1 and the ultraviolet flame detection circuit 2 connects respectively
In the respective input of the CPU 3, the output end of the CPU 3 is the output end of flame detection device.
The infra red flame detection circuit 1, the ultraviolet flame detection circuit 2 and the CPU 3 are installed on an electricity jointly
On the plate of road.
The compound flame detection device of the utility model, infrared acquisition and ultraviolet detection are combined, and utilize same CPU
Infrared signal and UV signal are analyzed and processed, extract the exclusive feature of flare up fire.Due to infrared acquisition and ultraviolet spy
Survey that operation principle is each advantageous, the wave band of infrared acquisition and ultraviolet detection impression is in different sections, Ultraviolet sensor and infrared
Sensor characteristics is different, by two kinds of detection modes it is compound, maximize favourable factors and minimize unfavourable ones, the advantage using both, not only overcome biography
Infra red flame detection device of uniting easily is produced the deficiency of wrong report by temperature, vibration influence, also overcomes ultraviolet flame detection device
The deficiency easily disturbed by sunshine, electric welding light, the functional reliability of flame detection device can be effectively improved.
In the utility model, infra red flame detection circuit 1 is using conventional infra red flame detection circuit.
As shown in Fig. 2 the ultraviolet flame detection circuit 2 includes the booster circuit 21 that is sequentially connected, ultraviolet light sensing tube and
Its drive circuit 22, pulse stretching and shaping circuit 23, and pulse frequency discriminator circuit 24, the input of booster circuit 21 connect
5V power supplys are connect, the output end of pulse frequency discriminator circuit 24 is fire alarm output end.
As shown in figure 3, the DC voltage booster circuit that it is DC300V by DC5V photovoltaic conversions that booster circuit 21, which is, for providing
State the operating voltage of ultraviolet light sensing tube.
As shown in figure 4, the output end of the input of ultraviolet light sensing tube and its drive circuit 22 connection booster circuit 21
(DC300V), interface P3 is used to connect the ultraviolet light sensing tube.During work, the ultraviolet light sensing tube receives ultraviolet signal, when
When ultraviolet signal reaches some strength, the ultraviolet light sensing tube conducting, sawtooth waveforms is exported by electric capacity C6 (SINGALIN) and believed
Number.
As shown in figure 5, pulse stretching and shaping circuit 23 are using double accurate monostable flipflop U3 (CD4538) and its outside
Enclose circuit, double accurate monostable flipflop U3 input (the 4th pin) connection ultraviolet light sensing tube and its output of drive circuit 22
Hold (SINGALIN), the input of double accurate monostable flipflop U3 output end (the 6th pin) connection pulse frequency discriminator circuit 24
End.Pulse stretching and shaping circuit 23 are used to sawtooth waveforms caused by ultraviolet light sensing tube and its drive circuit 22 be converted into a fixed width
The square wave of degree, facilitate the analyzing and processing of succeeding impulse signal.
As shown in fig. 6, pulse frequency discriminator circuit 24 includes 555 timer U4 and its peripheral circuit and metric counting
Device U2 (CD4017BCM), the 555 timer U4 output end are connected to the reset terminal of the counter U2, and double precisions are monostable
State trigger U3 output end (the 6th pin) is connected to counter U2 input, and the output end of the counter U2 is fire alarm
Signal output part (S2IN).
Because flare up fire and sun optical signal, electric welding optical signal are all there is ultraviolet, therefore ultraviolet detector is easy
Disturbed by sunshine, produce wrong report, in order to identify flare up fire, the utility model spy devises pulse frequency discriminator circuit 24.
Because the frequency of flare up fire and sun optical signal or electric welding optical signal generation sawtooth signal is inconsistent, therefore, pulse frequency
Cycle timing is carried out using 555 timer U4 in discriminator circuit 24, when pulse stretching in a period of time and shaping circuit 23 export
The umber of pulse of square wave be not reaching to setting value, then judge that this pulse signal (square wave) nonflame signal produces, 555 timer U4
Output high level carries out reset clearing to counter U2.
If the umber of pulse for the square wave that pulse stretching and shaping circuit 23 export reaches setting value, counter in a period of time
U2 works, and exports fire alarm.Specifically：In Fig. 6, three short-circuited terminals JP8, JP9, JP10 are coupled with the of counter U2
1st, 6,11 output pin, during work, three short-circuited terminals JP8, JP9, JP10 only have a conducting in synchronization, for adjusting
Detector sensitivity, when JP8 is turned on, then counter U2 in the time inside counting of 555 timer U4 timings to during 5 pulses,
Fire alarm is exported from S2IN；When JP9 is turned on, then counter U2 in the time inside counting of 555 timer U4 timings to 7 pulses
When, export fire alarm from S2IN；JP10 turn on when, then counter U2 in the time inside counting of 555 timer U4 timings to 9
During pulse, fire alarm is exported from S2IN.
The utility model can effectively prevent sun optical signal or be welded optical signal by setting pulse frequency discriminator circuit
Interference.
Claims (5)
- A kind of 1. compound flame detection device, it is characterised in that：Including infra red flame detection circuit, ultraviolet flame detection circuit And CPU, the output end of the infra red flame detection circuit and the ultraviolet flame detection circuit are connected to the phase of the CPU Input is answered, the output end of the CPU is the output end of flame detection device；The infra red flame detection circuit, the ultraviolet flame detection circuit and the CPU are installed on a circuit board jointly；The ultraviolet flame detection circuit includes the booster circuit being sequentially connected, ultraviolet light sensing tube and its drive circuit, pulse exhibition Wide and shaping circuit, and pulse frequency discriminator circuit, the input connection 5V power supplys of booster circuit, pulse frequency discriminator circuit Output end be fire alarm output end.
- A kind of 2. compound flame detection device according to claim 1, it is characterised in that：The booster circuit is will DC5V photovoltaic conversions are DC300V DC voltage booster circuit, for providing the operating voltage of the ultraviolet light sensing tube.
- A kind of 3. compound flame detection device according to claim 1, it is characterised in that：The ultraviolet light sensing tube and its Drive circuit exports sawtooth signal.
- A kind of 4. compound flame detection device according to claim 3, it is characterised in that：The pulse stretching and shaping The sawtooth signal is converted into the square wave of one fixed width by circuit.
- A kind of 5. compound flame detection device according to claim 1, it is characterised in that：The pulse frequency differentiates electricity Road includes 555 timers and its peripheral circuit and counter, and the output end of 555 timer is connected to answering for the counter The output end of position end, the pulse stretching and shaping circuit is connected to the input of the counter, the output of the counter End is fire alarm output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720447642.5U CN206696996U (en) | 2017-04-26 | 2017-04-26 | A kind of compound flame detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720447642.5U CN206696996U (en) | 2017-04-26 | 2017-04-26 | A kind of compound flame detection device |
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| Publication Number | Publication Date |
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| CN206696996U true CN206696996U (en) | 2017-12-01 |
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ID=60446279
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| CN201720447642.5U Active CN206696996U (en) | 2017-04-26 | 2017-04-26 | A kind of compound flame detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111260877A (en) * | 2020-01-16 | 2020-06-09 | 西安博深安全科技股份有限公司 | Self-learning anti-misoperation ultraviolet flame sensor and self-learning method |
| CN113916381A (en) * | 2021-10-11 | 2022-01-11 | 无锡格林通安全装备有限公司 | Flame detection method and device based on FFT, BP and rectangular filter bank |
| CN113971863A (en) * | 2021-10-19 | 2022-01-25 | 无锡格林通安全装备有限公司 | Flame detection method based on FFT-GMM-K neighbor |
| CN117405233A (en) * | 2023-09-19 | 2024-01-16 | 中国船舶集团有限公司第七一三研究所 | Ultraviolet-infrared dual-band composite flame detection method and device |
-
2017
- 2017-04-26 CN CN201720447642.5U patent/CN206696996U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111260877A (en) * | 2020-01-16 | 2020-06-09 | 西安博深安全科技股份有限公司 | Self-learning anti-misoperation ultraviolet flame sensor and self-learning method |
| CN113916381A (en) * | 2021-10-11 | 2022-01-11 | 无锡格林通安全装备有限公司 | Flame detection method and device based on FFT, BP and rectangular filter bank |
| CN113971863A (en) * | 2021-10-19 | 2022-01-25 | 无锡格林通安全装备有限公司 | Flame detection method based on FFT-GMM-K neighbor |
| CN117405233A (en) * | 2023-09-19 | 2024-01-16 | 中国船舶集团有限公司第七一三研究所 | Ultraviolet-infrared dual-band composite flame detection method and device |
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