CN1841029B - Flame detector - Google Patents
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- CN1841029B CN1841029B CN2006100741540A CN200610074154A CN1841029B CN 1841029 B CN1841029 B CN 1841029B CN 2006100741540 A CN2006100741540 A CN 2006100741540A CN 200610074154 A CN200610074154 A CN 200610074154A CN 1841029 B CN1841029 B CN 1841029B
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Abstract
Provided is a flame detector capable of simple and reliable determination of the occurrence or nonoccurrence of fire resulting from a flame based on waveforms detected from detection signals from infrared sensors. The flame detector includes an infrared sensor for detecting an infrared ray, a RAM serving as a waveform storing unit for storing a plurality of waveforms detected from an output signal from the infrared sensor, and a CPU serving as a wavelength determining unit for determining succession of waveforms when at least a first predetermined number of waveforms stored in the RAM are produced for a first predetermined time and at least a second predetermined number of waveforms different from the first predetermined number of waveforms are produced for a second predetermined time different from the first predetermined time.
Description
Technical field
The present invention relates to differentiate the flame detector of flame fluctuation, specifically, relate to the flame detector that can detect the flame fluctuation easy, reliably.
Background technology
When differentiating the flame of fire, according to flame fluctuate differentiate flame principle in the past for the various methodologies utilization with the false alarm of difference to flame high temp objects in addition.
For instance, existing fire detector and fire detecting method, frequency analysis is carried out in the detection output that reception luminous energy is transformed to the detecting sensor of electric signal with high speed fourier transform method, investigate the frequency spectrum profile of this frequency analysis gained, come the center frequency-band of comparison flame, the frequency band of revolving light, low-frequency band spectrum component in addition, and detect flame spectrum strive for survival situation under be judged to be fire (reference example such as patent documentation 1).
Patent documentation 1: Ri Bente Open 2002-162296 communique (the 1st page, Fig. 1)
And, when differentiating the flame of fire, from the infrared ray that flame sent with CO
2Resonance bands etc. are associated and obtain the infrared ray output of 2 or above wave band, and the infrared ray of getting rid of high temp objects etc. according to its ratio carries out flame to be differentiated, and this principle was used by the whole bag of tricks in the past.
For instance, existing infrared ray flame detecting equipment is managed the infrared ray of the peculiar wavelength of detection of fires and near the infrared ray of wavelength thereof, utilizes two kinds of ultrared energy ratios, surveys the fire (reference example such as patent documentation 2) that flame causes.
Patent documentation 2: Ri Bente Open 2000-356547 communique (the 1st page, Fig. 1)
Summary of the invention
Existing flame detector and flame detection method, differentiate flame owing to fluctuating according to flame, must generate the distribution plan of frequency spectrum, need carry out that mould fast fourier transform method etc. is handled, other is handled with momentary output phase region to the detection of detecting sensor output, handle quite complicated and the time of requiring efforts, also be short of this problem to some extent aspect the reliability of fire differentiation so exist.
And, existing infrared ray flame detecting equipment is managed the infrared ray of the peculiar wavelength of detection of fires and near the infrared ray of its wavelength, the fire that utilizes two kinds of ultrared energy ratio detection flames to cause, but there is this problem, promptly from the output of actual flame than because its fluctuation form is fixing, thereby only depend on two kinds of ultrared outputs and can't survey the fire of flame initiation reliably than this situation in being in specialized range.
The present invention will address the above problem just, and its purpose is to provide a kind of waveform that can detect from the detection signal of infrared ray sensor, and is easy according to this waveform, differentiate the flame detector of the flame of fire reliably.
And, its purpose be to provide a kind of can be according to the fluctuation of the flame of reality, and be conceived to the variation that two kinds of infrared rays are exported ratios, differentiate the flame detector of the fire that flame is arranged reliably than the distribution that is in regulation by grasping two kinds of ultrared outputs.
Equally, its purpose is to provide a kind of flame detector because the fluctuation form of actual flame is fixing, so by grasp the data relevant distribution that is in regulation with detected pulse waveform differentiate the fire that flame is arranged reliably.
The flame detector that the present invention relates to, it constitutes and comprises: detect ultrared infrared ray sensor; Be used for storing waveform storage unit from the detected a plurality of waveforms of output signal of this infrared ray sensor; And there is the 1st specified quantity or above and exist under the 2nd specified quantity different with the 1st specified quantity or the above situation in the waveform of storing in this waveform storage unit in the 2nd stipulated time different with the 1st stipulated time in the 1st stipulated time, and the differentiation waveform is continuous waveform number judgement unit.
In addition, the another kind of flame detector that the present invention relates to, it constitutes and comprises: detect ultrared infrared ray sensor; From the output signal of this infrared ray sensor, detect the wave test unit of waveform; And with the time that this wave test unit detects the 1st waveform be starting point, from beginning to detect this 1 waveform interval till detecting next waveform when being in the 3rd specific time interval, continue detection waveform, and when described starting point began through the 4th stipulated time, differentiating described waveform was continuous WFS judgement unit.
In addition, aforesaid two kinds of flame detectors, described infrared ray sensor are the ultrared main infrared ray sensors of the peculiar wave band that sends of flame detection; This flame detector further comprises its wave band of detection ultrared secondary infrared ray sensor different with this main infrared ray sensor; Calculate the arithmetic element of the output ratio of two infrared ray sensor detection signals; And differentiate the flame judgement unit of flame than being in the specified distribution state according to the output that this arithmetic element is calculated.
In addition, aforesaid two kinds of flame detectors, it constitutes and comprises:
Be taken into the detection signal of this infrared ray sensor, and the Wave data of obtaining the Wave data of a plurality of pulses is obtained the unit; And be in the flame judgement unit that the specified distribution state is differentiated flame according to the Wave data that this Wave data is obtained the obtained a plurality of pulses in unit.
The present invention is as indicated above, the output signal of the infrared ray sensor of waveform number judgement unit by managing to confirm the waveform storage unit be pulse waveform in the 1st stipulated time, exist the 1st specified quantity or above and in the 2nd stipulated time, exist the 2nd specified quantity or with on differentiate the detected pulse waveform of infrared ray sensor and can continue to obtain, thereby needn't be as in the past according to flame fluctuation decision waveform width, or generated frequency distributes, by the waveform of being stored according to the waveform storage unit pulse waveform number in the stipulated time is counted this simple process, the pulse waveform that just can know flame easy and reliably and produced distributes.
In addition, the WFS judgement unit is that time of the 1st waveform of pulse is starting point by the output signal that detects infrared ray sensor with the wave test unit, when being in the 3rd specific time interval, 1 interval of waveform till detecting next waveform continues detection waveform from beginning to detect, and during from the off through the 4th stipulated time, differentiating the detected pulse waveform of infrared ray sensor can continue to obtain, thereby needn't be as in the past according to flame fluctuation decision waveform width, or generated frequency distributes, but by making continuous detecting go out this simple process of state continuance stipulated time of waveform, just can be simply and also the pulse waveform knowing flame reliably and produced can continue to obtain.
Differentiation as indicated above is under the pulse waveform situation that can continue to obtain, thermal source in for example coming into view suddenly, though there is very large output to take place, but can be used as momentary output and foreclose, although produce bigger output under the situation about adding even if having to impact, the output that this momentary wrong report factor is produced also can foreclose.
In addition, arithmetic element is calculated the output ratio of main infrared ray sensor and secondary infrared ray sensor detection signal, the output of the two infrared ray sensor detection signals that the flame judgement unit is then calculated according to this arithmetic element is than the existence that is in specified distribution condition discrimination flame, so that can judge according to carrying out flame than distribution state with the corresponding output of the fluctuation of actual flame, can differentiate flame reliably.
And, Wave data is obtained the unit and is taken into the detection signal of infrared ray sensor and obtains a plurality of pulse waveform data, the flame judgement unit then is in the specified distribution state according to this Wave data and differentiates flame, so that can differentiate flame reliably according to judging with the fluctuation form of actual flame and the corresponding pulse waveform DATA DISTRIBUTION of unfixed variation.
Description of drawings
Fig. 1 is the block diagram that its formation of flame detector of embodiment of the present invention 1 is shown;
Fig. 2 is its inner block diagram that constitutes of MPU that this flame detector is shown;
Fig. 3 illustrates that infrared ray sensor output signal with this flame detector is taken into MPU and the key diagram of waveform processing under the continuous situation of waveform;
Fig. 4 is that the infrared ray sensor output signal that illustrates this flame detector is taken into MPU and the discontinuous situation of waveform
Fig. 5 illustrates the key diagram that infrared ray sensor output signal with this flame detector is taken into the waveform number juggling under the continuous situation of waveform that MPU carries out;
Fig. 6 is the workflow diagram that this flame detector is shown;
Fig. 7 illustrates the key diagram that the infrared ray sensor output signal of this flame detector is taken into the pulse waveform data class of MPU;
Fig. 8 illustrates its various Wave data tables of pulse that the infrared ray sensor output signal of this flame detector are taken into MPU.
Embodiment
Fig. 1 is the block diagram that its formation of flame detector of embodiment of the present invention 1 is shown.Fig. 2 is its inner block diagram that constitutes of MPU that this flame detector is shown.Fig. 3 illustrates that infrared ray sensor output signal with this flame detector is taken into MPU and the key diagram of waveform processing under the continuous situation of waveform.Fig. 4 illustrates that infrared ray sensor output signal with this flame detector is taken into MPU and the key diagram of waveform processing under the discontinuous situation of waveform.Fig. 5 illustrates that infrared ray sensor output signal with this flame detector is taken into MPU and the key diagram of waveform number juggling under the continuous situation of waveform.Fig. 6 is the workflow diagram that this flame detector is shown.Fig. 7 illustrates the key diagram that the infrared ray sensor output signal of this flame detector is taken into the pulse waveform data class of MPU.Fig. 8 illustrates its various Wave data tables of pulse that the infrared ray sensor output signal of this flame detector are taken into MPU.
Flame detector inside shown in Figure 1 has by being assembled with the main infrared ray sensor 1 that thermoelectric sensitive element that pyroelectrics, high resistance, FET constitute etc. is formed, and this main infrared ray sensor 1 receives that flame detection is used and CO
2The infrared ray that resoance radiation is relevant is transformed to electric signal and exports enlarging section 2 to.Input to MPU3 through enlarging section 2 amplifying signals.
And this flame detector also has the secondary infrared ray sensor 11 with main infrared ray sensor 1 identical formation, and this pair infrared ray sensor 11 receives the different infrared ray of its wave bands and main infrared ray sensor 1, is transformed to electric signal and exports enlarging section 12 to.Input to MPU 3 through enlarging section 12 amplifying signals.
In addition, be that secondary infrared ray sensor 11 1 sides can constitute the infrared detection wavelength of output pyroelectrics with respect to CO with main infrared ray sensor 1 one side differences
2The signal that the wave band of resoance radiation (for example 5.0 μ m) departs from slightly.
In addition, MPU 3 is connected with fire signal generating unit 21 by I/O circuit 38.Fire signal generating unit 21 is used for the detection signal of corresponding MPU 3 when MPU 3 differentiates waveforms and is flame and exports fire signal, so be connected with not shown fire receiving equipment.22 is power supply unit, to each unit power supply.23 for providing the power supply of the regulation DC voltage signal wire of holding concurrently to power supply unit 22,24 for monitoring the line voltage distribution monitoring unit of power supply, set for power supply unit 22 and the power supply signal wire 23 of holding concurrently, it is confirmed as under fire condition is not that the hold concurrently line voltage distribution of signal wire 23 of power supply is unusual and allow the MPU3 output detection signal.
Action below with reference to the flame detector of the flowchart text embodiment of the present invention of Fig. 6.
Concise and to the point, in the process flow diagram of Fig. 6, handle as sampling, be taken into the output of infrared ray sensor 1,11 with predetermined distance by A/D transducer 31, with it as detecting level.Continue to obtain to detect level from main infrared ray sensor 1, therefrom, detect waveform, generate each waveform data and be stored in RAM 34 based on the flame fluctuation.Then, carry out flame according to this waveform and differentiate, differentiate from following two aspects this moment: promptly differentiate and whether can continue to obtain waveform and differentiate waveform whether have flame characteristic.Output fire signal when differentiating for flame according to above-mentioned two aspects.
Among Fig. 6, the output of the sensor of at first main infrared ray sensor 1 and secondary infrared ray sensor 11 inputs to MPU 3 after being amplified by enlarging section 2,12 respectively.
The CPU 32 of MPU 3, in case to the sample time that timer 35 sets, just with cycle of for example this regulation of 50ms to take a sample through the detection signal of the main infrared ray sensor 1 of A/D transducer 31 A/D conversion and secondary infrared ray sensor 11 (step S1).
Then, detect the up-to-date pulse waveform (step S2) that fluctuates based on flame the detection signal of the main infrared ray sensor 1 that obtains from taking a sample.
The detection of this pulse waveform, the detection level of the detection signal that will be taken into by taking a sample surpasses the starting point that is identified as waveform when the waveform of stipulating is differentiated level, until falling after rise to being lower than waveform till waveform is differentiated level as a waveform, it is among the RAM 34 that this moment that begins to surpass is stored in storer as time stamp, and generates as a follow-up Wave data that waveform is required.This time stamp is used to confirm whether waveform subsequent recurs.
Here, have the crest (maximal value) that begins to surpass time stamp constantly, predominant wavelength as shown in Figure 7, the waveform area ratio of predominant wavelength/commplementary wave length and the pulse width of predominant wavelength, store above-mentioned Wave data with regard to each waveform as Wave data.
Specifically, with regard to the crest of predominant wavelength, waveform begins, and each sampling detects data rises, and when predominant wavelength transfers to when descending from the rising of level, the detection data that rise at last as maximal value, is stored in RAM34 with its crest as predominant wavelength.
In addition, with regard to the waveform area ratio of predominant wavelength/commplementary wave length, calculate the detection data of rising and transfer to descend falling to the integrated value that is lower than till waveform is differentiated the preceding numerical value of level, calculate the ratio with the integrated value of the commplementary wave length of integral operation simultaneously, and its waveform area ratio as predominant wavelength/commplementary wave length is stored in RAM 34.The waveform area of this predominant wavelength/commplementary wave length is than being the splitting ratio of predominant wavelength/commplementary wave length.
With regard to the pulse width of predominant wavelength, detect data and fall after rise to being lower than and just be judged as waveform when waveform is differentiated level and finish, represent from time stamp to falling after rise with number of samples, and be stored in RAM 34 as pulse width to the time that is lower than till waveform is differentiated level.
Shown in table among Fig. 8, from beginning to detect this waveform till finish, the waveform area of time stamp, waveform peak (maximal value), predominant wavelength/commplementary wave length is than the Wave data of (splitting ratio), predominant wavelength pulse width, store 12 respectively, during i.e. the 13rd pulse generation of up-to-date pulse, then remove the oldest Wave data, store 12 Wave datas so all the time.
Detect up-to-date pulse waveform like this, CPU 32 is the oldest pulse data (step S3) of deletion from RAM 34 just.
Then, CPU 32 with up-to-date pulse waveform data storage in RAM 34 (step S4).
By so up-to-date pulse waveform data are stored in RAM 34 successively, but the marking that picks up counting as waveform also is stored among the RAM 34,20 seconds counters (the 4th stipulated time) that CPU 32 starting is meanwhile narrated later 37 and 5 seconds counter (the 3rd stipulated time) 36.
On the other hand, as shown in Figure 5, the number of pulse waveform is differentiated, as one that whether can continue to obtain in this differentiation of waveform, CPU 32 removes to read in the waveform that is stored in RAM 34, to whether existing 12 (the 1st specified quantities) or above waveform to differentiate (step S5) in 15 seconds (the 1st stipulated time) of tracing back before beginning from the moment that will differentiate, put sign A effectively (step S6) when satisfying this condition, then put sign A invalid (step S7) when not satisfying this condition.
Then, to with above-mentioned same 10 seconds (the 2nd stipulated time) of tracing back before beginning from the moment that will differentiate in whether exist 8 (the 2nd specified quantities) or above waveform to differentiate (step S8), put sign B effectively (step S9) when satisfying this condition, then put sign B invalid (step S10) when not satisfying this condition.
Like this, just can differentiate the distribution of a plurality of pulse waveforms that obtained easily by in two different times, comprising the waveform of specified quantity separately.
Then, as to whether continuing to obtain another method of the differentiation that waveform carries out, 32 couples of CPU whether pulse waveform continuously and the recurrent interval 5 seconds with interior state continuance 20 seconds or more than differentiate (step S11), put sign C effectively (step S12) when satisfying this condition, then put sign C invalid (step S13) when not satisfying this condition.
Now this differentiation is elaborated, as shown in Figure 3, if from beginning to detect initial pulse waveform, to beginning to detect next pulse waveform is with interior words at 5 seconds, 5 seconds counters 36 are resetted, and counter 37 then continued timing in 20 seconds, here, whenever detecting pulse waveform, Wave data is stored in RAM 34.
The continuation that resets of 5 seconds counters 36,20 seconds counters 37 arrive the rearmounted sign of timing time and effectively show the condition that satisfies continuation in these 20 seconds.And this sign is continued to reset by 5 seconds counters 36 and continues, and 5 seconds counters 36 arrive timing times and then indicate and be cleared.
Again, as shown in Figure 4, if do not detect next pulse waveform, and 5 seconds counters arrive timing time, then make counter 37 zero clearings in 20 seconds constantly at this.
After this, detect pulse waveform again, just get back to and begin the place, 5 seconds counters 36 of identical starting with above-mentioned steps S4 and 20 seconds counters 37 both.
Just make 5 seconds counters 36 continue to reset whenever detecting pulse waveform like this, and 20 seconds counters 37 arrive timing time, just put sign once again effectively.
And all sign A, B, C all are changed to when effective, and CPU 32 works as waveform differentiation means, differentiates whether to continue to obtain waveform, differentiates the step whether next waveform has flame characteristic then.
Like this, the recurrent interval 5 seconds with interior state continuance 20 seconds or more than, in 15 seconds, have 12 or above waveform, and have 8 or above waveform in 10 seconds, thereby can confirm that flame continues, and momentary phenomenon can be foreclosed.
To whether continuing to obtain the differentiation of above-mentioned waveform, though be that detection signal according to a promptly main infrared ray sensor 1 carries out, next step then carries out according to the detection signal of main infrared ray sensor 1 and secondary infrared ray sensor 11 differentiation whether waveform has flame characteristic.
Like this according to the detection signal of main infrared ray sensor 1 and secondary infrared ray sensor 11 carry out flame differentiate be because, because the infrared ray of Fire Radiation is by so-called CO
2Resoance radiation, it is different that the so-called blackbody radiation that its beam split distribution and object radiation go out is the situation of continuous distribution, be rendered as at its infra-red intensity of certain wavelengths (for example 4.4 μ m) and increase, the peak wavelength of flame in main infrared ray sensor 1 one sides detect from fire, detect the heat radiation wavelength of avoiding this peak value in secondary infrared ray sensor 11 1 sides, both sensor output is than being that splitting ratio between wavelength is for example 3: 1 when the fire of flame is arranged.
Can be according to the waveform area of predominant wavelength/commplementary wave length than the splitting ratio of calculating between this wavelength.
Thereby, the paired pulses waveform has the differentiation of flame characteristic, because actual flame fluctuation form is unfixing, so the crest of predominant wavelength, the waveform area of predominant wavelength/commplementary wave length also can change than the pulse width of (splitting ratio) and waveform, thereby can judge according to the situation that above-mentioned data change separately.
(1) to the explanation of the variation of the crest of predominant wavelength.
To the Wave data of each waveform, in the output during sampling the maximal value of predominant wavelength is stored in RAM 34 as the crest of predominant wavelength.In 12 Wave datas of CPU 32 in RAM 34, when crest all specified level or more than, and contain 1 or abovely be 0.8 or differentiate when following and be flame (step S26) with respect to peaked ratio as the level maximum.
(2) to the explanation of the waveform area of predominant wavelength/commplementary wave length than the variation of (splitting ratio)
At first confirm from the pulse wavelength of main infrared ray sensing 1 acquisition and the wavelength area ratio between the two that obtains from secondary infrared ray sensor 11, be between wavelength area than be 3 or above pulse whether two or more (step S27) are arranged, confirm then between wavelength area than be 2 or above pulse whether 4 or above (step S28) are arranged, confirm that at last whether splitting ratio between the wavelength of whole pulses is 1 or above (step S29), splitting ratio between wavelength be 3 or above pulse have two or more, and be 2 or above pulse have 4 or more than, and all the splitting ratio between its wavelength of pulse be 1 or above situation under, CPU 32 just works as flame differentiation means, differentiates for the fire of flame is arranged.
(3) to the explanation of the variation of the pulse width of waveform
To the Wave data of each waveform, calculate and the output when taking a sample surpasses waveform and differentiates suitable pulse width of time till level rises when being lower than waveform and differentiating level, be stored in RAM 34.
In 12 Wave datas in this RAM 34, pulse width is all in specialized range, and this specialized range is divided into 3 scopes, cut apart scope and the long scope of cutting apart can comprise 3 or when above respectively short, the pulse width of supposing whole pulses is in specialized range and then differentiates and be flame (step S30).
Like this, the flame that utilizes the impulse level of step S26 to carry out differentiates, utilizes splitting ratio carries out between the wavelength of step S27～S29 flame to differentiate and the differentiation to having flame characteristic that utilizes the pulse width of step S30 to carry out is all differentiated for being under the situation of flame, then can differentiate the fire (step S31) for flame is arranged.
Then, in case differentiate for the fire of flame is arranged, MPU 6 just detects output by fire signal generating unit 21, and fire signal generating unit 21 is exported to the fire receiving equipment by the power supply signal wire 23 of holding concurrently with fire signal.
As this embodiment, waveform number differentiation means be CPU 32 by manage to confirm waveform storage means be the detection signal of the main infrared ray sensor 1 of storage among the RAM 34 be pulse waveform in 15 seconds the 1st stipulated time, exists 12 this 1st specified quantities or above and in 10 seconds the 2nd stipulated time 8 this 2nd specified quantities of existence or more than, just differentiate to continue obtain the detected pulse waveform of main infrared ray sensor 1, thereby needn't produce frequency distribution according to flame fluctuation decision waveform width as in the past, as long as by being that the waveform of being stored among the RAM 34 is counted this simple process to the pulse waveform number in the stipulated time according to waveform storage means, the pulse waveform that just can know flame easy and reliably and produced distributes.
Differentiate like this for can continue to obtain under the situation of pulse waveform, thermal source in though for example come into view suddenly has very large output to take place, but can be used as momentary output and foreclose, although produce bigger output under the situation about adding even if having to impact, the output that this momentary wrong report factor is produced also can foreclose.
Here, waveform number differentiation means are CPU 32 owing to the output signal of main infrared ray sensor 1 is surpassed with it serves as that time of obtaining the wave test level that the waveform of fluctuation sets to serve as beginning discern as a waveform until the waveform that falls after rise till be lower than this wave test level, being stored in waveform storage means is RAM 34, so when differentiating the flame fluctuation by setting the detection level that begins to be identified as pulse waveform lower in advance, differentiate even can carry out flame, can realize the early stage differentiation and the high sensitivity of flame thereby detection output itself is less.
In addition, playing the time that the CPU 32 of effect manages to detect the 1st waveform as wave test means and WFS differentiation means is starting point, when being in the 3rd specific time interval of 5 seconds counters 36, this 1 waveform interval till detecting next waveform continues detection waveform from beginning to detect, and when above-mentioned starting point begins the 4th stipulated time through 20 seconds counters 37, differentiate above-mentioned waveform for continuous, rise and then remove above-mentioned starting point when interval till detecting next waveform surpasses the 3rd specific time interval beginning to detect this 1 waveform, but so CPU 32 paired pulses waveforms when counting, can confirm that waveform continues at the 3rd specific time interval, and the continuation limit of confirming waveform by the limit is to the counting of the waveform in the 4th stipulated time, thereby can be easy and differentiate output from flame reliably.
Here, the wave test means are CPU 32 owing to the output signal of main infrared ray sensor 1 is surpassed with it serves as that time of obtaining the wave test level that the waveform of fluctuation sets to serve as beginning detect each waveform until the waveform that falls after rise till be lower than this wave test level as a waveform, by setting the detection level that begins to be identified as pulse waveform lower in advance, differentiate even can carry out flame, can realize the early stage differentiation and the high sensitivity of flame thereby detection output itself is less.
Have again, the CPU 32 that works as flame differentiation means manages recently to differentiate the fire that flame is arranged according to the pulse wavelength that obtains from main infrared ray sensor 1 with from the wavelength beam split between the two that secondary infrared ray sensor 11 obtains, so differentiate pulse waveform continuously after, can differentiate the fire that flame is arranged for belonging to reliably.
In addition, flame differentiation means be CPU 32 manage at the pulse wavelength that obtains from main infrared ray sensor 1 with from the wavelength splitting ratio between the two that secondary infrared ray sensor 11 obtains be 3 or above pulse reach between 3 or above and whole pulse wavelength splitting ratio and be 1 or then differentiate for the fire of flame is arranged when above, because the differentiation of at least two steps of experience, thereby can differentiate the fire that flame is arranged for belonging to more reliably.
In addition, in the present embodiment, in 32 pairs of a plurality of pulses of CPU of working as computing means and flame differentiation means each is calculated the output ratio of the detection signal of main infrared ray sensor 1 and secondary infrared ray sensor 11, be in the specified distribution state according to the output ratio of each this pulse and differentiate flame, so can differentiate thereby can carry out flame reliably according to judging with the distribution of the corresponding output ratio of the variation of actual flame.
In addition, a plurality of splitting ratios between the wavelength that CPU 32 will obtain from two infrared ray sensors and a plurality of threshold value compare the splitting ratio of differentiating between this wavelength and whether are in the specified distribution state, so for actual flame fluctuation form and unfixed situation, just judge at its variation, thereby can carry out flame more reliably and differentiate.
Have again, in the present embodiment, obtain CPU 32 that means and flame differentiation means work by being taken into the detection signal of infrared ray sensor as Wave data, to obtain the Wave data of a plurality of pulses, and distribute according to the Wave data of these a plurality of pulses and to carry out flame and differentiate, thereby can distribute according to the Wave data of thereby the situation corresponding pulse that change fixing with the fluctuation of actual flame and judge, differentiate thereby can carry out flame reliably.
As the Wave data of this pulse crest, the pulse width of pulse are arranged, but also can be other key elements.
In addition, CPU 32 at the crest value of each pulse and pulse width respectively with the threshold of regulation, distribution is separately differentiated, so judge the variation of actual flame, thereby can carry out flame more reliably and differentiate from various angles.
The drawing reference numeral explanation
1 main infrared ray sensor, 2 enlarging sections, 3 MPU (fire judegment part), 11 secondary infrared ray sensors, 21 fire signal generating units, 22 power supply units, the 23 power supplys holding wire of holding concurrently, 24 line voltage distribution monitoring units, 31 A/D converters, 32 CPU, 33 ROM, 34 RAM, 35 timers, 36 5 seconds counters, 37 20 seconds counters, 38I/O circuit.
Claims (10)
1. a flame detector is characterized in that, comprising:
Detect ultrared infrared ray sensor;
Be used for storing waveform storage unit from the detected a plurality of waveforms of output signal of this infrared ray sensor; And
There is the 1st specified quantity or above and exist under the 2nd specified quantity different with the 1st specified quantity or the above situation in the waveform of storing in this waveform storage unit in the 2nd stipulated time different with the 1st stipulated time in the 1st stipulated time, the differentiation waveform is continuous waveform number judgement unit.
2. flame detector as claimed in claim 1 is characterized in that,
Described waveform number judgement unit surpasses described infrared ray sensor output signal with it serve as time of obtaining the wave test level that the waveform of fluctuation sets serve as beginning until the waveform recognition that falls after rise till be lower than this wave test level to be a waveform, and described waveform is stored in storage unit.
3. a flame detector is characterized in that, comprising:
Detect ultrared infrared ray sensor;
From the output signal of this infrared ray sensor, detect the wave test unit of waveform; And
The time that detects the 1st waveform with this wave test unit is starting point, from beginning to detect this 1 waveform interval till detecting next waveform when being in the 3rd specific time interval, continue detection waveform, and when described starting point began through the 4th stipulated time, differentiating described waveform was continuous WFS judgement unit.
4. flame detector as claimed in claim 3 is characterized in that,
Described wave test unit surpasses with described infrared ray sensor output signal that to serve as time of obtaining the wave test level that the waveform of fluctuation sets detect as the starting point of waveform.
5. as each described flame detector in the claim 1～4, it is characterized in that,
Described infrared ray sensor is the ultrared main infrared ray sensor of the peculiar wave band that sends of flame detection; And
Described flame detector also comprises its wave band of detection ultrared secondary infrared ray sensor different with this main infrared ray sensor;
Described waveform number judgement unit or described WFS judgement unit be to behind the differentiating continuously of described waveform, and the fire of flame is recently differentiated in the beam split of the wavelength that obtains according to the wavelength of the pulse that obtains from described main infrared ray sensor with from described secondary infrared ray sensor.
6. as claim 1 or 3 described flame detectors, it is characterized in that described infrared ray sensor is the ultrared main infrared ray sensor of the peculiar wave band that sends of flame detection; And
Described flame detector further comprises:
Detect its wave band ultrared secondary infrared ray sensor different with this main infrared ray sensor;
Calculate the arithmetic element of the output ratio of two infrared ray sensor detection signals; And
Differentiate the flame judgement unit of flame according to the output that this arithmetic element is calculated than being in the specified distribution state.
7. flame detector as claimed in claim 6 is characterized in that,
Described flame judgement unit calculates a plurality of output ratios by described arithmetic element, and relatively these a plurality of outputs than and a plurality of threshold value differentiate the specified distribution state that whether is in.
8. as flame detector as described in claim 1 or 3, it is characterized in that, further comprise:
Be taken into the detection signal of this infrared ray sensor, and the Wave data of obtaining the Wave data of a plurality of pulses is obtained the unit; And
The Wave data of obtaining the obtained a plurality of pulses in unit according to this Wave data is in the flame judgement unit that the specified distribution state is differentiated flame.
9. flame detector as claimed in claim 8 is characterized in that,
Described Wave data is obtained waveform peak and/or the pulse width of the Wave data of the obtained a plurality of pulses in unit for each pulse.
10. flame detector as claimed in claim 9 is characterized in that,
Described flame judgement unit is differentiated separately distribution with the threshold of regulation respectively at the waveform peak of described each pulse and/or pulse width.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-095429 | 2005-03-29 | ||
| JP2005-095430 | 2005-03-29 | ||
| JP2005095430 | 2005-03-29 | ||
| JP2005095429A JP4698267B2 (en) | 2005-03-29 | 2005-03-29 | Flame detector |
| JP2005095429 | 2005-03-29 | ||
| JP2005095430A JP4999282B2 (en) | 2005-03-29 | 2005-03-29 | Flame detector |
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| Publication Number | Publication Date |
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| CN1841029A CN1841029A (en) | 2006-10-04 |
| CN1841029B true CN1841029B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100741540A Expired - Fee Related CN1841029B (en) | 2005-03-29 | 2006-03-27 | Flame detector |
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| JP (1) | JP4698267B2 (en) |
| CN (1) | CN1841029B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5183553B2 (en) * | 2009-03-31 | 2013-04-17 | 能美防災株式会社 | Fire detector |
| CN102381567A (en) * | 2010-09-03 | 2012-03-21 | 中国石油化工股份有限公司 | Bulk sulfur storage method |
| US9251683B2 (en) * | 2011-09-16 | 2016-02-02 | Honeywell International Inc. | Flame detector using a light guide for optical sensing |
| JP5645885B2 (en) * | 2012-06-29 | 2014-12-24 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
| CN111141504B (en) * | 2019-12-25 | 2022-04-15 | Oppo（重庆）智能科技有限公司 | Fire-break detection method and device and computer readable storage medium |
| JP7118160B2 (en) * | 2020-05-13 | 2022-08-15 | オーレーザー株式会社 | Ignition detection method and ignition detection device |
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| US5237512A (en) * | 1988-12-02 | 1993-08-17 | Detector Electronics Corporation | Signal recognition and classification for identifying a fire |
| US5850182A (en) * | 1997-01-07 | 1998-12-15 | Detector Electronics Corporation | Dual wavelength fire detection method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6138429A (en) * | 1984-07-30 | 1986-02-24 | Tekken Kensetsu Co Ltd | Radiant infrared type flame detection apparatus |
| JPH0413851Y2 (en) * | 1985-07-17 | 1992-03-30 | ||
| JP2583769B2 (en) * | 1987-08-25 | 1997-02-19 | 宮田工業株式会社 | Fire monitoring system |
| JP3938276B2 (en) * | 2000-11-29 | 2007-06-27 | ニッタン株式会社 | Flame detector and flame detection method |
| JP4527326B2 (en) * | 2001-09-28 | 2010-08-18 | 能美防災株式会社 | Flame detection device |
| JP4088521B2 (en) * | 2002-12-19 | 2008-05-21 | 能美防災株式会社 | Fire detection equipment |
-
2005
- 2005-03-29 JP JP2005095429A patent/JP4698267B2/en not_active Expired - Fee Related
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2006
- 2006-03-27 CN CN2006100741540A patent/CN1841029B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237512A (en) * | 1988-12-02 | 1993-08-17 | Detector Electronics Corporation | Signal recognition and classification for identifying a fire |
| US5850182A (en) * | 1997-01-07 | 1998-12-15 | Detector Electronics Corporation | Dual wavelength fire detection method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4698267B2 (en) | 2011-06-08 |
| CN1841029A (en) | 2006-10-04 |
| JP2006277323A (en) | 2006-10-12 |
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