CN201866789U - Intelligent flame monitoring device for boiler - Google Patents
Intelligent flame monitoring device for boiler Download PDFInfo
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- CN201866789U CN201866789U CN2010201997109U CN201020199710U CN201866789U CN 201866789 U CN201866789 U CN 201866789U CN 2010201997109 U CN2010201997109 U CN 2010201997109U CN 201020199710 U CN201020199710 U CN 201020199710U CN 201866789 U CN201866789 U CN 201866789U
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Abstract
The utility model provides an intelligent flame monitoring device for a boiler, which can be applied in a boiler device with a plurality of combustors. The monitoring device comprises a flame probe, an amplifying module, a gain control module, a filtering module and a digital processing module, wherein the flame probe is used for detecting flames of the combustors, the amplifying module is used for amplifying and outputting received flame signals, the gain control module is used for controlling the amplification of the amplifying module, and the filtering module is used for providing filtering types, the center frequency and the Q value and outputting filtering signals. After receiving the filtering signals, the digital processing module conducts analog-to-digital conversion and Fourier transformation to obtain the range and frequency of the current flames, tracks the range and frequency of the previous sampling flames and compares the range and frequency of the current flames with those of the previous flames to determine the flame state of the combustor with reference to the flame states of adjacent combustors, so as to further obtain gain parameters of the gain control module and the filtering types, the center frequency and the Q value of the passband control module, thereby solving the difficult problems of peeking and overleaping in the prior art.
Description
Technical field
The utility model relates to a kind of boiler flame monitoring technology, particularly relates to a kind of boiler flame monitor that is applied in intelligent filter in the boiler flame monitoring field and flame combustion from motion tracking.
Background technology
Current, the boiler with a plurality of multi-combustors is being carried out in the flame monitoring, because the mutual interference of adjacent burner flame meeting phase makes the flame of tested burner detect the puzzlement that exists " stealing a glance at ", " leakage is seen ".For many years in the flame monitoring field, for addressing the above problem the following several method of main employing, but poor effect.
To pop one's head in and install away from furnace wall, it is to rely on to change setting angle, avoids that the mode of bias light realizes.But there are following two problems:
1) because the interference of skew ray in outer veiling glare of stove and the stove; reduced the resolution capability that flame is detected; for getting rid of above-mentioned interference; when debugging, the basic point current potential will be improved by main frame; to reach the purpose of eliminating spurious signal; also reduce simultaneously more weak fire combustion signal detection accuracy in the flame detection, protective device input closed loop reliability in the boiler irregular operation is obviously reduced, occurred protecting wrong report easily.
2) flame detects the mounting means take away from burner hearth, the angle that receives the furnace flame signal diminish (having only 15-20 ° under the actual conditions).Therefore, boiler moves under situations such as underload, unstable combustion, flame kernel skew, and flame detects and sends no fiery signal in the stove easily, causes the protection wrong report.
Owing to the develop rapidly of microprocessor technology, driven the update of flame monitoring equipment along with in recent years.Xian Jin flame monitoring instrument has frequency-selective filtering on hardware in the world, and the judgement to flame on software generally all has the function of " fire study is arranged " and " not having fire study ", for a difficult problem that effectively solves " stealing a glance at ", " leakage is seen " has been brought light.But using in addition according to the scene, following problems exists:
1) field adjustable difficulty, and also must rely on commissioning engineer's experience is carried out manual setting to gain, frequency band, threshold equivalence, has then needed expensive human cost since so, and also is difficult to avoid causing human error.
2) in boiler combustion process, because the variation of fuel composition and other disturbing factor change parameters such as flame intensity, frequency, the setting value when being offset debugging produces wrong report.
So, how a kind of boiler intelligent flame monitoring equipment is provided, effectively detect the flame burning state, the difficult problem of " stealing a glance at " of the prior art for solving, " leakage is seen " has become the present problem demanding prompt solution of dealer of association area.
Summary of the invention
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of boiler intelligent flame monitoring apparatus, the difficult problem of " stealing a glance at " of the prior art in order to solve, " leakage is seen ".
Reach other relevant purposes for achieving the above object, the utility model provides a kind of boiler intelligent flame monitoring apparatus, be applied to have in the boiler plant of a plurality of burners, it is characterized in that, described boiler intelligent flame monitoring apparatus comprises at least: flame probe, amplification module, gain control module, filtration module, and digital signal processing module.Wherein, described flame probe is in order to detecting the flame of described burner, and the output flare up fire; Described amplification module connects described flame probe, amplifies back output in order to the flare up fire that will receive; Described gain control module connects described amplification module, in order to control the amplification quantity of described amplification module; Described filtration module connects described amplification module and gain control module, and being used for provides filtering pattern, centre frequency and Q value according to the amplifying signal of described amplification module output, and described amplifying signal is carried out exporting filtering signal after the filtering; Described digital signal processing module connects described filtration module and gain control module, carry out analog-to-digital conversion after receiving described filtering signal, with the data signal after the conversion, through Fourier transformation, to obtain current flame amplitude and frequency, follow the tracks of last sampled value flame amplitude and frequency simultaneously, more current flame amplitude and frequency and last flame amplitude and frequency, and, further provide the gain parameter of described gain control module and the filtering pattern of passband control module with reference to the flame status of determining this burner adjacent to the flame status of the burner of described flame probe, centre frequency and Q value.
In boiler intelligent flame monitoring apparatus of the present utility model, described filtration module comprises passband control module and filter unit, and wherein, described passband control module connects described gain control module, in order to filtering pattern, centre frequency and Q value to be provided.Described filter unit connects described amplification module and passband control module, exports in order to filtering.
In boiler intelligent flame monitoring apparatus of the present utility model, described digital signal processing module also comprises AD converting unit, automatic tracking cell, pattern recognition unit, database and I/O interface unit.Wherein, described AD converting unit connects described filter unit, in order to being to export after the data signal analog signal conversion.Described automatic tracking cell connects described passband control module and gain control module, in order to follow the tracks of last sampled value flame amplitude and frequency, and the flame status of this burner that will determine, further provide the gain parameter of described gain control module and filtering pattern, centre frequency and the Q value of passband control module.Described pattern recognition unit connects described AD converting unit, automatic tracking cell and database, the data signal that is converted in order to the filtering signal that receives, after Fourier transformation, more current flame amplitude and frequency and last flame amplitude and frequency, and the flame status of this burner is determined in reference adjacent to the flame status of the burner of described flame probe.Described database is in order to store last flame amplitude and frequency and current flame amplitude and frequency.Described I/O interface unit is in order to connecting man-machine interface, and exports a switching value and analog quantity.
As mentioned above, boiler intelligent flame monitoring apparatus of the present utility model compared with prior art, change probe into closed installation, and utilize microprocessor technology and automatic tracking technique, the parameter decision flame combustion state that obtains according to automatic tracking technique changes, further adopt the intelligent filter technology, obtain effective flame combustion state, for solving " stealing a glance at ", the difficult problem of " leakage is seen " provides more efficient methods, and alleviated the workload of field adjustable, and exempted the wrong report that causes because of fuel change or other disturbing factor, and effectively overcome various shortcoming of the prior art.
Description of drawings
Fig. 1 is shown as the system block diagram of the utility model boiler intelligent flame monitoring apparatus.
The specific embodiment
Below by specific instantiation embodiment of the present utility model is described, those skilled in the art can understand other advantages of the present utility model and effect easily by the content that this specification disclosed.The utility model can also be implemented or be used by the other different specific embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present utility model not deviating from.
See also Fig. 1, Fig. 1 is shown as the system block diagram of the utility model boiler intelligent flame monitoring apparatus; Need to prove, the diagram that is provided in the present embodiment only illustrates basic conception of the present utility model in a schematic way, satisfy only show in graphic with the utility model in relevant assembly but not component count drafting when implementing according to reality, its assembly layout kenel also may be more complicated during its actual enforcement.
As shown in the figure, the utility model provides a kind of boiler intelligent flame monitoring apparatus 1, be applied to have in the boiler plant of a plurality of burners, it is characterized in that, described boiler intelligent flame monitoring apparatus 1 comprises at least: flame probe 11, amplification module 12, gain control module 13, filtration module 14, and digital signal processing module 15.
Described flame probe 11 is in order to detecting the flame of described burner, and the output flare up fire; In present embodiment, described flame probe 11 is closed installation.
Described amplification module 12 connects described flame probe 11, amplifies back output in order to the flare up fire that will receive; In present embodiment, described amplification module 12 is an amplifying circuit.
Described gain control module 13 connects described amplification module 12, in order to control the amplification quantity of described amplification module 12; In present embodiment, described gain control module 13 is a gain control circuit, and the effective combination that promptly utilizes linear amplification and compression to amplify is adjusted the amplifying signal of described amplification module 12 outputs.When input signal is more weak, linear amplifier circuit work, the intensity of assurance output signal; When input signal strength acquires a certain degree, start the compression amplifying circuit, output amplitude is reduced, satisfied the needs that input signal is decayed.
Described filtration module 14 connects described amplification module 12 and gain control module 13, and being used for provides filtering pattern, centre frequency and Q value according to the amplifying signal of described amplification module 12 outputs, and described amplifying signal is carried out exporting filtering signal after the filtering; In present embodiment, described filtration module 14 comprises passband control module 141 and filter unit 142, and wherein, described passband control module 141 connects described gain control module 13, in order to filtering pattern, centre frequency and Q value to be provided.Described filter unit 142 connects described amplification module 12 and passband control module 141, exports in order to filtering.In present embodiment, described passband control module 141 is connected to form by programmable interface and data latches (eight d type flip flops).Described filter unit 142 is a programmable filter.
Described digital signal processing module 15 connects described filtration module 14 and gain control module 13, carry out analog-to-digital conversion after receiving described filtering signal, with the data signal after the conversion, through Fourier transformation (FFT), to obtain current flame amplitude (Pn) and frequency (Fn), follow the tracks of last sampled value flame amplitude (Pn-1) and frequency (Fn-1) simultaneously, more current flame amplitude (Pn) and frequency (Fn) and last flame amplitude (Pn-1) and frequency (Fn-1), and, further provide the gain parameter of described gain control module and the filtering pattern of passband control module with reference to the flame status of determining this burner adjacent to the flame status of the burner of described flame probe, centre frequency and Q value.
What the needs special instruction was is, the workflow of described digital signal processing module 15 is: the AD conversion value of at first reading described AD converting unit output, 16 points of sampling again, through Fourier transformation (FFT conversion), obtain current flame amplitude (Pn) and frequency (Fn), in described database 154, read last flame amplitude (Pn-1) and frequency (Fn-1), calculate Δ F=Fn-Fn-1 then; Δ P=Pn-Pn-1.Judge Δ F whether greater than the parameter of initial setting, judge Δ P＞, judge again whether the burner adjacent to described flame probe has flame, and finally determine gain coefficient, filtering filtering pattern, centre frequency and Q value whether greater than the parameter of initial setting.
In present embodiment, described digital signal processing module 15 also comprises AD converting unit 151, automatic tracking cell 152, pattern recognition unit 153, database 154 and I/O interface unit 155.
Described AD converting unit connects described filter unit 142, in order to being to export after the data signal analog signal conversion.In present embodiment, described AD converting unit is one to be digital signal conversion circuit with analog signal conversion.
Described automatic tracking cell 152 connects described passband control module 141 and gain control module 13, in order to follow the tracks of last sampled value flame amplitude (Pn-1) and frequency (Fn-1), and the flame status of this burner that will determine, further provide the gain parameter of described gain control module 13 and filtering pattern, centre frequency and the Q value of passband control module 141.
Described pattern recognition unit 153 connects described AD converting unit 151, automatic tracking cell 152 and database 154, the data signal that is converted in order to the filtering signal that receives, after Fourier transformation, more current flame amplitude (Pn) and frequency (Fn) and last flame amplitude (Pn-1) and frequency (Fn-1), and the flame status of this burner is determined in reference adjacent to the flame status of the burner of described flame probe.In present embodiment, the flame status of adjacent burner is obtained by the RS485 bus communication that described I/O interface unit 155 connects.
Described database 154 is in order to store last flame amplitude (Pn-1) and frequency (Fn-1) and current flame amplitude (Pn) and frequency (Fn).
Described I/O interface unit 155 is in order to connecting man-machine interface, and exports a switching value 16 and analog quantity 17.The man-machine interface that described I/O interface unit 155 connects, concrete, described man-machine interface is output device and input unit, in output device described in the present embodiment is LCD display 18, described input unit is a keyboard 19, of particular note, described I/O interface unit 155 also is connected with RS485 bus communication 20, in order to be obtained the flame status of adjacent burner by RS485 bus communication 20.
In sum, boiler intelligent flame monitoring apparatus of the present utility model changes probe into closed installation, and utilize microprocessor technology and automatic tracking technique, the parameter decision flame combustion state that obtains according to automatic tracking technique changes, further adopt the intelligent filter technology, obtain effective flame combustion state, for solving " stealing a glance at ", the difficult problem of " leakage is seen " provides more efficient methods, and alleviated the workload of field adjustable, and exempted the wrong report that causes because of fuel change or other disturbing factor, thereby compared with prior art, the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
The foregoing description is illustrative principle of the present utility model and effect thereof only, but not is used to limit the utility model.Any personage who has the knack of this technology all can be under spirit of the present utility model and category, and the foregoing description is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of being finished under spirit that the utility model discloses and the technological thought, must be contained by claim of the present utility model.
Claims (10)
1. a boiler intelligent flame monitoring apparatus is applied to have in the boiler plant of a plurality of burners, it is characterized in that, described boiler intelligent flame monitoring apparatus comprises at least:
Flame probe, in order to detecting the flame of described burner, and the output flare up fire;
Amplification module connects described flame probe, amplifies back output in order to the flare up fire that will receive;
Gain control module connects described amplification module, in order to control the amplification quantity of described amplification module;
Filtration module connects described amplification module and gain control module, and being used for provides filtering pattern, centre frequency and Q value according to the amplifying signal of described amplification module output, and described amplifying signal is carried out exporting filtering signal after the filtering;
Digital signal processing module, connect described filtration module and gain control module, carry out analog-to-digital conversion after receiving described filtering signal, with the data signal after the conversion, through Fourier transformation, to obtain current flame amplitude and frequency, follow the tracks of last sampled value flame amplitude and frequency simultaneously, more current flame amplitude and frequency and last flame amplitude and frequency, and, further provide the gain parameter of described gain control module and the filtering pattern of passband control module with reference to the flame status of determining this burner adjacent to the flame status of the burner of described flame probe, centre frequency and Q value.
2. boiler intelligent flame monitoring apparatus according to claim 1 is characterized in that: described filtration module comprises passband control module and filter unit.
3. boiler intelligent flame monitoring apparatus according to claim 2 is characterized in that: described passband control module connects described gain control module, in order to filtering pattern, centre frequency and Q value to be provided.
4. boiler intelligent flame monitoring apparatus according to claim 2 is characterized in that: described filter unit connects described amplification module and passband control module, exports in order to filtering.
5. boiler intelligent flame monitoring apparatus according to claim 2 is characterized in that: described digital signal processing module also comprises AD converting unit, automatic tracking cell, pattern recognition unit, database and I/O interface unit.
6. boiler intelligent flame monitoring apparatus according to claim 5 is characterized in that: described AD converting unit connects described filter unit, in order to being to export after the data signal analog signal conversion.
7. boiler intelligent flame monitoring apparatus according to claim 5, it is characterized in that: described automatic tracking cell connects described passband control module and gain control module, in order to follow the tracks of last sampled value flame amplitude and frequency, and the flame status of this burner that will determine, further provide the gain parameter of described gain control module and filtering pattern, centre frequency and the Q value of passband control module.
8. boiler intelligent flame monitoring apparatus according to claim 5, it is characterized in that: described pattern recognition unit connects described AD converting unit, automatic tracking cell and database, the data signal that is converted in order to the filtering signal that receives, after Fourier transformation, more current flame amplitude and frequency and last flame amplitude and frequency, and the flame status of this burner is determined in reference adjacent to the flame status of the burner of described flame probe.
9. boiler intelligent flame monitoring apparatus according to claim 5 is characterized in that: described database is in order to store last flame amplitude and frequency and current flame amplitude and frequency.
10. boiler intelligent flame monitoring apparatus according to claim 5 is characterized in that: described I/O interface unit is in order to connecting man-machine interface, and exports a switching value and analog quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201997109U CN201866789U (en) | 2010-05-24 | 2010-05-24 | Intelligent flame monitoring device for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201997109U CN201866789U (en) | 2010-05-24 | 2010-05-24 | Intelligent flame monitoring device for boiler |
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| CN201866789U true CN201866789U (en) | 2011-06-15 |
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| CN2010201997109U Expired - Fee Related CN201866789U (en) | 2010-05-24 | 2010-05-24 | Intelligent flame monitoring device for boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261670A (en) * | 2010-05-24 | 2011-11-30 | 上海闽佳自动化设备有限公司 | Intelligent flame monitor for boiler |
| CN102368044A (en) * | 2011-09-27 | 2012-03-07 | 南京创能电力科技开发有限公司 | Intelligent plasma flame detection device |
| CN102506444A (en) * | 2011-11-04 | 2012-06-20 | 国电南京自动化股份有限公司 | Furnace hearth flame detecting method based on intelligent-control computer vision technology |
| CN104180393A (en) * | 2013-05-27 | 2014-12-03 | 林内株式会社 | Combustion Control System |
| CN112963859A (en) * | 2021-03-12 | 2021-06-15 | 华能(广东)能源开发有限公司海门电厂 | Boiler critical flame protection misoperation prevention regulation and control system |
-
2010
- 2010-05-24 CN CN2010201997109U patent/CN201866789U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261670A (en) * | 2010-05-24 | 2011-11-30 | 上海闽佳自动化设备有限公司 | Intelligent flame monitor for boiler |
| CN102368044A (en) * | 2011-09-27 | 2012-03-07 | 南京创能电力科技开发有限公司 | Intelligent plasma flame detection device |
| CN102506444A (en) * | 2011-11-04 | 2012-06-20 | 国电南京自动化股份有限公司 | Furnace hearth flame detecting method based on intelligent-control computer vision technology |
| CN102506444B (en) * | 2011-11-04 | 2014-04-02 | 国电南京自动化股份有限公司 | Furnace hearth flame detecting method based on intelligent-control computer vision technology |
| CN104180393A (en) * | 2013-05-27 | 2014-12-03 | 林内株式会社 | Combustion Control System |
| CN112963859A (en) * | 2021-03-12 | 2021-06-15 | 华能(广东)能源开发有限公司海门电厂 | Boiler critical flame protection misoperation prevention regulation and control system |
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Addressee: Shanghai Jia Jia automation equipment Co., Ltd. Finance Document name: Notification of Approving Refund |
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Addressee: Shanghai Minjia Automation Equipment Co., Ltd. Document name: Notification to Pay the Fees |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20140524 |