CN2697640Y - Double-channel intelligent flame tester - Google Patents
Double-channel intelligent flame tester Download PDFInfo
- Publication number
- CN2697640Y CN2697640Y CN 200420021435 CN200420021435U CN2697640Y CN 2697640 Y CN2697640 Y CN 2697640Y CN 200420021435 CN200420021435 CN 200420021435 CN 200420021435 U CN200420021435 U CN 200420021435U CN 2697640 Y CN2697640 Y CN 2697640Y
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- flame
- detecting device
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- frequency
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model relates to a double-channel intelligent flame tester. The flame frequency and threshold level of the light intensity signal are arranged by a computer and a special software. Via the collection and analysis of the strong signal of the flame light in the effective frequency stage, the differentiation of the signals of various frequency and light intensity of the flame in the multiple burning furnaces is realized. The signal of the flame intensity can be accurately judged, increasing the accurate reliability of monitoring the flame in the burner. The tester of the utility model can collect and analyze the parameters of the two characters of the flame, and avoid the signal disturbance of the other flame lights, accurately judging the existence and the burning state of the flame, and effectively solving the problem of the tester mistaken testing in the multiple burner furnaces. Furthermore, by adopting the card inserting structure which is convenient to mount and maintain, the tester is a comparatively advanced flame tester.
Description
Technical field
The utility model relates to a kind ofly surveys flame by photoelectric sensor, and the combustion flame light intensity signal is converted to voltage signal, and the flame detector of combustion position belongs to flare up fire analyzing and processing noncontact measurement field in the observation boiler.
Background technology
Because the flame characteristic frequency difference during different types of fuel combustion, the intensity of flame is also different under every kind of frequency, therefore accurately detects, the flame situation during the control fuel combustion is not easy very much.Especially in large-sized boiler, the flame situation during fuel combustion is complicated more.Yet, observe in the boiler flame detector of combustion position fairly simple at present.During detecting device observation combustion flame situation, mainly the combustion flame light intensity signal that receives is converted to voltage signal by the photoelectric sensor in the detecting device, simple process relatively after, differentiation flame has or not and combustion position.Measure like this, both ignored the frequecy characteristic of flare up fire, may handle incorrectly again, be difficult to accurate flame detection situation flare up fire.Especially, in the large-sized boiler control system of a plurality of burners is arranged,, a plurality of flare points are arranged again, cause that with regard to being easy to flame detects misjudgment and causes the control misoperation with one deck because multilayer flame is arranged.Therefore, in order further to improve the discrimination and the detecting reliability of flame, the utility model is by improving, and development provides a kind of binary channels intelligent flame detecting device.
Summary of the invention
The purpose of this utility model is flame light intensity signal in the effective frequency section is carried out collection analysis, and the flame relative frequency detected, by setpoint frequency scope and intensity threshold threshold value the flame light intensity signal of various frequencies is distinguished, thereby improve to monitor the accuracy and the reliability of combustion flame, provide a kind of effective judgement flare up fire to have or not and the binary channels pick-up unit of intensity size.
To achieve these goals, the utility model adopts following scheme:
The utility model binary channels intelligent flame detecting device mainly adopts multi-purpose computer and special software that flame characteristic frequency and intensity threshold threshold value are presetted, and the flare up fire intensity and the frequency of certain spectral range sampled, analyze, realize the flame intensity signal in the multi-combustor stove is made accurate judgement.In the detecting device, two photoelectric sensors are connected with binary channels flame detector mainboard by quad.Binary channels flame detector mainboard comprises intensity treatment loop, frequency processing loop, self check loop and microprocessing unit.Wherein, the intensity treatment loop is made up of one-level prime amplifier, active power filtering IC integrated circuit able to programme, secondary programmable amplifier, full-wave rectifying circuit and analog to digital converter; The frequency processing loop is made up of schmitt trigger and frequency.The utility model intelligent flame detecting device amplifier-chain plate comprises two symmetric channels, and every block of amplifier-chain plate can be with two photoelectric sensors.Detecting device adopts the card insert type structure, so that installation and maintenance.When detecting device uses, can sample to the flare up fire intensity and the frequency of certain spectral range, and both are provided with the threshold threshold value by software, realization is accurately judged the flame intensity signal in the multi-combustor stove, thereby avoid other burner flame light signal to disturb, accurately judge to have or not flame and combustion position.
The advantage of the utility model binary channels intelligent flame detecting device is, adopt multi-purpose computer and special software that flame parameters is presetted, and flare up fire intensity and two characteristic parameters of frequency of certain spectral range are carried out sampling analysis, by software both are provided with the threshold threshold value, accurately judge the flame intensity signal in the multi-combustor stove.Thereby having solved the mistake detection problem in the multi-combustor stove preferably, is a kind of more advanced intelligent flame detecting device.
Description of drawings
Fig. 1 is the utility model binary channels intelligent flame detector circuit plate.Wherein, 1-flame detector mainboard.
Fig. 2 is the utility model binary channels intelligent flame detector arrangement block diagram.Wherein, 2-Switching Power Supply, 3-golden finger cassette terminals, 4-junction board, 5-communication interface, 6-photoelectric sensor one, 7-computing machine, 8-photoelectric sensor two.
Fig. 3 is that the utility model binary channels intelligent flame detecting device detects the motherboard circuit block diagram.Wherein, 9, the 15-pre-amplification circuit, 10,16-active power filtering device able to programme, 11,17-numeral discharge circuit, 12, the 18-rectification circuit, 13, the 19-schmitt trigger, 14,20-frequency/voltage (V/F) change-over circuit, 21-eight channel modulus converters, 22-microprocessor, 23-relay, the 24-pilot lamp, 25,27-digital to analog converter, 26, the 28-voltage, the 29-multivibrator.
Fig. 4 is the utility model binary channels intelligent flame detector circuit schematic diagram ().
Fig. 5 is the utility model binary channels intelligent flame detector circuit schematic diagram (two).
Fig. 6 is the utility model binary channels intelligent flame detector circuit schematic diagram (three).
Fig. 7 is the utility model binary channels intelligent flame detector circuit schematic diagram (four).
Fig. 8 is the utility model binary channels intelligent flame detector circuit schematic diagram (five).
Embodiment
Further specify the utility model binary channels intelligent flame detecting device below in conjunction with accompanying drawing
Embodiment.
Embodiment
The utility model binary channels intelligent flame detecting device is implemented to press structured flowchart and is connected.Wherein, flame detector Switching Power Supply 2 links to each other with flame detector mainboard 1 by golden finger cassette terminals 3. Photoelectric sensor 6,8 links to each other with the junction board 4 of flame detector mainboard 1 by quad.The multi-purpose computer 7 that special software has been installed is connected with the communication interface 5 of flame detector mainboard 1 by serial cable, realizes the adjustment to controlled variable.During the work of the utility model intelligent flame detector circuit, because the flame light intensity signal is irregular similar sinusoidal signal usually, characteristic frequency region is 20-300 hertz (Hz), and because of the fuel type difference, flame intensity is relevant with the fuel combustion situation.The utility model binary channels intelligent flame detecting device is by pre-amplification circuit 9,15 pairs of photoelectric sensors 6,8 light intensity electric signal amplifies (gain manual adjustment), through active filter 10 able to programme, strength signal beyond the 16 filtering characteristic frequencies, operational amplification circuit 11 then, 17 pairs of signals carry out gain-adjusted, to adapt to different flame situations, by rectification circuit 12,18 are transformed to direct current signal with AC signal, by analog to digital converter 21 this signal is changed into digital quantity and give microprocessor 22, per 50 milliseconds of (mS) once sampling, every back production 100 times, averaged behind digital filtering obtains the flame intensity value with this.The quality factor q of active filter 10,16 wherein able to programme and angular frequency Fc are by the software adjustment.The flame intensity value converts voltage signal to through digital to analog converter 25,27, again by converter 26,28 output 4-20 milliampere current signals.Simultaneously, another branch road in the detecting device carries out the look-in frequency processing.Concrete processing procedure is as follows: through schmitt trigger 13,19 it is become dc pulse signal from the signal of active filter 10,16 outputs able to programme, realize the conversion of frequencies by frequency/voltage (F/V) change-over circuit 14,20, give analog to digital converter 21 again and convert it into digital quantity input microprocessor 22 and handle to voltage signal.In addition, by the upper and lower limit of software set frequency threshold threshold value and intensity threshold threshold value, and frequency, the intensity set satisfying under the certain condition, makes signal output fire be arranged or do not have fire.For example, frequency, intensity are simultaneously or just exported fire when having one to satisfy setting value.Determine the output of relay 23 and pilot lamp 24 signals, and the output of flame intensity signal.Wherein, multivibrator 29 provides the clock source for two active filters 10,16 able to programme.When system is in when fiery state is arranged, 50 volts of bias supplies that microprocessor 22 will be supplied with photoelectric sensor in per two minutes cut off, and the intensity level by detecting analog to digital converter 21 and the size of frequency values realize whether being in malfunction, avoid wrong report that fire is arranged.The utility model binary channels intelligent flame detecting device has solved the detector problem that mistake is surveyed in the multi-combustor stove better by after the analysis and judgement to two characteristic quantities of flare up fire.
Claims (5)
1, a kind of binary channels intelligent flame detecting device, comprise the flame light intensity signal in effective frequency band, multi-purpose computer, photoelectric sensor, quad, prime amplifier, active power filtering IC integrated circuit able to programme, operational amplification circuit, rectification circuit, analog to digital converter, signal amplifies, schmitt trigger, microprocessor, converter, frequency/voltage (F/V) change-over circuit, multivibrator, relay and pilot lamp, it is characterized in that having on the binary channels intelligent flame detecting device mainboard binary channels that photoelectric sensor light intensity electric signal is amplified, by pre-amplification circuit, active filter able to programme, operational amplification circuit, rectification circuit, analog to digital converter, flame intensity detection treatment loop that microprocessor and converter are formed and binary channels are by active filter able to programme, schmitt trigger, frequency/voltage (F/V) change-over circuit, the frequency processing loop that analog to digital converter and microprocessor are formed.
2, binary channels intelligent flame detecting device according to claim 1, what it is characterized in that the judgement of detecting device collection analysis is flare up fire intensity and two characteristic parameters of frequency.
3, binary channels intelligent flame detecting device according to claim 1 is characterized in that binary channels intelligent flame detecting device mainboard is the card insert type structure of easy installation and maintenance.
4, binary channels intelligent flame detecting device according to claim 1 is characterized in that having in the detecting device by computer software pre-seting, can be to the threshold threshold value of certain spectral range flare up fire intensity and frequency separation.
5, binary channels intelligent flame detecting device according to claim 1 is characterized in that tested combustion flame characteristic frequency region is: the 20-300 hertz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021435 CN2697640Y (en) | 2004-03-31 | 2004-03-31 | Double-channel intelligent flame tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021435 CN2697640Y (en) | 2004-03-31 | 2004-03-31 | Double-channel intelligent flame tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2697640Y true CN2697640Y (en) | 2005-05-04 |
Family
ID=34769953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420021435 Expired - Lifetime CN2697640Y (en) | 2004-03-31 | 2004-03-31 | Double-channel intelligent flame tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN2697640Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408313B (en) * | 2008-10-10 | 2011-05-04 | 北京航空航天大学 | Double-element flame monitor |
| CN101692049B (en) * | 2009-09-29 | 2011-07-20 | 北京安控科技股份有限公司 | Control system used for COD on-line automatic monitor |
| CN105938017A (en) * | 2016-04-27 | 2016-09-14 | 江苏恒达动力科技发展股份有限公司 | Chemical fire and ordinary fire recognition method, device and equipment |
| CN109489937A (en) * | 2018-10-17 | 2019-03-19 | 宝钢湛江钢铁有限公司 | Multi fuel fire examines optical-fiber intelligent detection system and detection method |
| CN110578941A (en) * | 2018-06-08 | 2019-12-17 | 宁波方太厨具有限公司 | Automatic control system of range hood and control method thereof |
| CN111141504A (en) * | 2019-12-25 | 2020-05-12 | Oppo（重庆）智能科技有限公司 | Fire-break detection method and device and computer readable storage medium |
-
2004
- 2004-03-31 CN CN 200420021435 patent/CN2697640Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408313B (en) * | 2008-10-10 | 2011-05-04 | 北京航空航天大学 | Double-element flame monitor |
| CN101692049B (en) * | 2009-09-29 | 2011-07-20 | 北京安控科技股份有限公司 | Control system used for COD on-line automatic monitor |
| CN105938017A (en) * | 2016-04-27 | 2016-09-14 | 江苏恒达动力科技发展股份有限公司 | Chemical fire and ordinary fire recognition method, device and equipment |
| CN105938017B (en) * | 2016-04-27 | 2017-03-15 | 江苏恒达动力科技发展股份有限公司 | A kind of fiery and common fire of chemical industry knows method for distinguishing, device and equipment |
| CN110578941A (en) * | 2018-06-08 | 2019-12-17 | 宁波方太厨具有限公司 | Automatic control system of range hood and control method thereof |
| CN109489937A (en) * | 2018-10-17 | 2019-03-19 | 宝钢湛江钢铁有限公司 | Multi fuel fire examines optical-fiber intelligent detection system and detection method |
| CN111141504A (en) * | 2019-12-25 | 2020-05-12 | Oppo（重庆）智能科技有限公司 | Fire-break detection method and device and computer readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140331 Granted publication date: 20050504 |