CN204006096U - A kind of dynamic flame detection system - Google Patents
A kind of dynamic flame detection system Download PDFInfo
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- CN204006096U CN204006096U CN201420316338.3U CN201420316338U CN204006096U CN 204006096 U CN204006096 U CN 204006096U CN 201420316338 U CN201420316338 U CN 201420316338U CN 204006096 U CN204006096 U CN 204006096U
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- detection system
- flame detection
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- dynamic flame
- filter circuit
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Abstract
The utility model discloses a kind of dynamic flame detection system, belong to boiler combustion fire inspection field, comprise probe, amplifier, filter circuit, analog-digital converter, MCU, MCU output outputs to control device and display unit through optocoupler unit.This system is to flare up fire acquisition precision higher than existing equipment, and field adjustable is convenient, can analyze ultraviolet, infrared, visible ray, realizes integrated management based on 485 communication systems, has increased the efficiency of management control & monitor.
Description
Technical field
The utility model relates to the fire monitor equipment of industrial circle boiler combustion, relates in particular to a kind of dynamic flame detection system.
Background technology
In coal-burning boiler, pulverized coal flame approximately can be divided into four-stage: be one dark-coloured coal dust and the logistics that mixes of a hot blast, Ci Duan You Chengheilong district from the first paragraph of primary air nozzle ejection; Second segment is initial combustion district, and coal dust takes fire because of the heating that is subject to burner hearth high temperature gas flow and flame and refluxes, and a large amount of pulverized coal particle detonations form bright spots stream, and the brightness of this section is not maximum, but the change frequency of brightness reaches maximum; The 3rd section for completing combustion district, each pulverized coal particle with completing combustion under fully the mixing of Secondary Air, produce very large heat, the flame brightness of this section is the highest and stable; The 4th section is burning-out zone, and coal dust overwhelming majority all burnt at this moment forms flying dust, and the particle that minority is larger is proceeded burning, finally forms high temperature furnace air-flow, and the change frequency of its brightness and brightness is lower.
Flame detects, and sends bright strength characteristics principle and design while being the flicker fluctuation that produces during according to flame combustion and burning.According to the wavelength of flame, be divided into the inspection of ultraviolet ray fire, infrared fire inspection, visible flare up inspection etc.The principle of fire inspection is to utilize light-sensitive element scan and the pulsation rate of identifying flame generation distinguishes whether flame exists, and flare up fire is converted to frequency signal and strength signal, and frequency signal represents flashing of flame; Strength signal represents the brightness of flame.When different fuel burns in entering boiler by burner, there is the frequency broadband of oneself glimmering.
The measuring transducer of existing equipment is single, field adjustable inconvenience, and occupied ground, certainty of measurement is not high.
Utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of and maintains easily, the dynamic flame detection system of detection signal wide ranges.
Technical scheme: for achieving the above object, a kind of dynamic flame detection system of the present utility model comprises probe, amplifier, filter circuit, analog-digital converter, MCU, and MCU output outputs to control device and display unit through optocoupler unit.
This flame detector system utilizes flicker frequency and the emittance in second segment initial combustion district to judge flame detection; Gather direct current signal, AC signal, frequency signal by probe place, after filtering adjustment, change by digital to analog converter, obtain the data based on time domain by Fourier transformation, one group of data comprises direct current signal component after being calculated, AC signal component and frequency signal component.
Filter circuit adopts conventional second-order low-pass filter circuit, is formed this filter circuit low-pass cut-off frequencies 200Hz by the cascade of two single order low-pass filter circuits.
Described probe is 190 ~ 3000NN to the induction frequency spectrum of light, can analyze ultraviolet, infrared, visible ray.
Described amplifier comprises with MCU realizes the self-test unit of communication connection so that the result feedback that system component is detected automatically is also shown.The effect of self-test unit is whether detect constantly the various piece of monitoring device working properly, notes abnormalities and just reports to the police.Self-test unit is mainly made up of NE555, and it is timing circuit, produces the pulse of 1.5 seconds by it, controls main line, and main line signal is made zero, and notifies the single-chip microcomputer self-inspection time to arrive simultaneously, carries out self-inspection processing.
Flame characteristic signal (comprising flame intensity signal and flame frequency signal) is analyzed in the utility model utilization, and judgement has fire or without fire.Described MCU comprises for the flame intensity after conversion and the flame frequency signal threshold value corresponding with it are compared to the also logical block of output digit signals of judgement.Logical block by by gather amplitude M with transfer to such an extent that output threshold value N contrasts, if be all greater than setting threshold, output has fiery switching value, and return data collection; If be less than setting value, output is without fiery switching value, and return data collection.
Described MCU comprises the delay unit for preventing from causing because of instancy of combustion abrupt slope output.From having fire when changing without fire, there are fiery signal lag 2.5 seconds, if there was fiery signal conditioning to meet again in 2.5 seconds, remove without fire mark.Do not send out without fiery wire size.
This system realizes transfer of data based on 485 communication interfaces by control device and display unit and bus.Because existing table is all split, be inconvenient to control and safeguard, based on 485 communication systems, all tables can be connected to central station of floating dock, conveniently each table is carried out to monitoring and controlling.
Utilize flame detector system described in the utility model to flare up fire acquisition precision higher than existing equipment, field adjustable is convenient, can analyze ultraviolet, infrared, visible ray, realize integrated management based on 485 communication systems, increase the efficiency of management control & monitor.
Brief description of the drawings
Fig. 1 is system architecture schematic diagram of the present utility model;
Fig. 2 is the circuit diagram of the utility model filter circuit;
Fig. 3 is the circuit diagram of the utility model self-test unit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
Shown in Fig. 1, Fig. 2, Fig. 3, the utility model comprises probe, amplifier, filter circuit, analog-digital converter, MCU, and MCU output outputs to control device and display unit through optocoupler unit.
This flame detector system utilizes flicker frequency and the emittance in second segment initial combustion district to judge flame detection; Gather direct current signal, AC signal, frequency signal by probe place, after filtering adjustment, change by digital to analog converter, obtain the data based on time domain by Fourier transformation, one group of data comprises direct current signal component after being calculated, AC signal component and frequency signal component.
Filter circuit adopts conventional second-order low-pass filter circuit, is formed this filter circuit low-pass cut-off frequencies 200Hz by the cascade of two single order low-pass filter circuits.
Probe is 190 ~ 3000NN to the induction frequency spectrum of light, can analyze ultraviolet, infrared, visible ray.
Amplifier comprises with MCU realizes the self-test unit of communication connection so that the result feedback that system component is detected automatically is also shown.The effect of self-test unit is whether detect constantly the various piece of monitoring device working properly, notes abnormalities and just reports to the police.Self-test unit is mainly made up of NE555, and it is timing circuit, produces the pulse of 1.5 seconds by it, controls main line, and main line signal is made zero, and notifies the single-chip microcomputer self-inspection time to arrive simultaneously, carries out self-inspection processing.
Flame characteristic signal (comprising flame intensity signal and flame frequency signal) is analyzed in the utility model utilization, and judgement has fire or without fire.MCU comprises for the flame intensity after conversion and the flame frequency signal threshold value corresponding with it are compared to the also logical block of output digit signals of judgement.Logical block by by gather amplitude M with transfer to such an extent that output threshold value N contrasts, if be all greater than setting threshold, output has fiery switching value, and return data collection; If be less than setting value, output is without fiery switching value, and return data collection.
MCU comprises the delay unit for preventing from causing because of instancy of combustion abrupt slope output.From having fire when changing without fire, there are fiery signal lag 2.5 seconds, if there was fiery signal conditioning to meet again in 2.5 seconds, remove without fire mark.Do not send out without fiery wire size.
This system realizes transfer of data based on 485 communication interfaces by control device and display unit and bus.Because existing table is all split, be inconvenient to control and safeguard, based on 485 communication systems, all tables can be connected to central station of floating dock, conveniently each table is carried out to monitoring and controlling.
The above is only preferred embodiment of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a dynamic flame detection system, is characterized in that: comprise probe, amplifier, filter circuit, analog-digital converter and MCU, described MCU output outputs to control device and display unit through optocoupler unit.
2. a kind of dynamic flame detection system according to claim 1, is characterized in that: this system realizes transfer of data based on 485 communication interfaces by control device and display unit and bus.
3. a kind of dynamic flame detection system according to claim 1, is characterized in that: described amplifier comprises with MCU realizes the self-test unit of communication connection so that the result feedback that system component is detected automatically is also shown.
4. a kind of dynamic flame detection system according to claim 1, is characterized in that: described probe is 190 ~ 3000NN to the induction frequency spectrum of light.
5. a kind of dynamic flame detection system according to claim 1, is characterized in that: described filter circuit is second-order low-pass filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316338.3U CN204006096U (en) | 2014-06-13 | 2014-06-13 | A kind of dynamic flame detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316338.3U CN204006096U (en) | 2014-06-13 | 2014-06-13 | A kind of dynamic flame detection system |
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| Publication Number | Publication Date |
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| CN204006096U true CN204006096U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420316338.3U Expired - Fee Related CN204006096U (en) | 2014-06-13 | 2014-06-13 | A kind of dynamic flame detection system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913606A (en) * | 2016-06-30 | 2016-08-31 | 王永福 | Spark detecting method utilizing infrared rays and spark detecting device utilizing infrared rays |
| CN106897540A (en) * | 2017-03-28 | 2017-06-27 | 中国华能集团清洁能源技术研究院有限公司 | Method is monitored and optimized and revised to a kind of boiler-burner fired state on-line |
| CN107064113A (en) * | 2017-06-13 | 2017-08-18 | 华电青岛发电有限公司 | One kind realizes burner coal dust firing quality detecting system and method using optical fiber |
| CN107687649A (en) * | 2017-08-31 | 2018-02-13 | 青岛华迪科技有限公司 | The flame-out monitoring system of burner based on acoustic vibration and monitoring method |
| CN109185916A (en) * | 2018-08-28 | 2019-01-11 | 苏州新吉利奥自动化控制有限公司 | A kind of burner hearth extinguishing detecting device and its 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 |
-
2014
- 2014-06-13 CN CN201420316338.3U patent/CN204006096U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913606A (en) * | 2016-06-30 | 2016-08-31 | 王永福 | Spark detecting method utilizing infrared rays and spark detecting device utilizing infrared rays |
| CN106897540A (en) * | 2017-03-28 | 2017-06-27 | 中国华能集团清洁能源技术研究院有限公司 | Method is monitored and optimized and revised to a kind of boiler-burner fired state on-line |
| CN107064113A (en) * | 2017-06-13 | 2017-08-18 | 华电青岛发电有限公司 | One kind realizes burner coal dust firing quality detecting system and method using optical fiber |
| CN107687649A (en) * | 2017-08-31 | 2018-02-13 | 青岛华迪科技有限公司 | The flame-out monitoring system of burner based on acoustic vibration and monitoring 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 |
| CN110578941B (en) * | 2018-06-08 | 2021-04-16 | 宁波方太厨具有限公司 | Automatic control system of range hood and control method thereof |
| CN109185916A (en) * | 2018-08-28 | 2019-01-11 | 苏州新吉利奥自动化控制有限公司 | A kind of burner hearth extinguishing detecting device and its detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190220 Address after: 210000 Kechuang Building B101, National Science Park, Southeast University, No. 371 Yanziji Street and Yanlu Road, Qixia District, Nanjing, Jiangsu Province Patentee after: Nanjing Kaiserez Photoelectric Technology Co., Ltd. Address before: 210000 Building B5, Gate 1, Science and Technology Industrial Park, No. 15 Wanshou Road, Pukou Economic Development Zone, Nanjing City, Jiangsu Province Patentee before: Nanjing Wanhe Measurement & Control Instruments Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20210613 |