CN108592078B - Combustion state monitoring device and method based on spectral characteristics - Google Patents
Combustion state monitoring device and method based on spectral characteristics Download PDFInfo
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- CN108592078B CN108592078B CN201810580881.7A CN201810580881A CN108592078B CN 108592078 B CN108592078 B CN 108592078B CN 201810580881 A CN201810580881 A CN 201810580881A CN 108592078 B CN108592078 B CN 108592078B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
- F23M11/04—Means for supervising combustion, e.g. windows
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
Abstract
The invention discloses a combustion state monitoring device based on spectral characteristics, which comprises a central control system, a monitoring processing module, an optical fiber bundle and a probe, wherein the probe is arranged in a combustion chamber of an industrial furnace and is used for realizing the collection and transmission of optical signals, the optical fiber bundle comprises two end connectors and a coating object, the two end connectors of the optical fiber bundle are respectively connected with the monitoring processing module and the probe, the monitoring processing module is used for receiving combustion data of the combustion chamber, collected by the probe, identifying and extracting signal characteristics, and sending a transmission analysis result and a control signal to the central control system to realize the monitoring of the combustion state of the industrial furnace. The invention can realize combustion detection containing spectral characteristics with lower cost, and is suitable for the detection fields of activated carbon manufacture, gas furnaces, waste incineration and the like which need monitoring on combustion fuel.
Description
Technical Field
The invention belongs to the technical field of boiler combustion state detection, and particularly relates to a combustion state monitoring device and a monitoring method based on spectral characteristics.
Background
In various coal-fired furnaces and gas-fired furnaces, the combustion condition, the combustion efficiency, the pollutant discharge and the like are closely related to indexes such as combustion temperature, smoke composition and the like. In the production process of the activated carbon, the temperature of a furnace body and combustion components can also change along with the difference of time and distribution positions, and the product quality difference can be caused.
In order to realize the state monitoring of the combustion system, improve the safety and reduce the pollutant discharge, a system capable of monitoring the combustion condition in real time is needed. The current combustion detection comprises ultraviolet flame detection, infrared flame detection, ion flame detection and other methods. The fuel burning can radiate spectrum with certain frequency, and the ultraviolet sensor obtains flame through the circuit processing through the acquisition circuit. The infrared flame detection probe is composed of a photosensitive element, converts an optical signal in an infrared range into an electric signal through a measurement amplifying circuit and a temperature compensation circuit, and detects through an infrared signal generated by detecting flame.
The method mainly detects the existence or nonexistence of the flame, shows whether the combustion continues to exist, and cannot evaluate the size of the flame and the combustion condition. At present, the combustion detection based on optics can perform image processing and analysis according to image information to obtain a combustion mode, but due to the instability of flame combustion, misjudgment can occur on different combustion working conditions. The spectrum is generated by the reaction of chemical elements at high temperature, has clear combustion characteristics, can represent various information such as temperature distribution, component composition and the like, and has wide application. Through light intensity and spectral characteristics during combustion, the combustion condition can be better evaluated.
During combustion, fuel components are very critical parameters, and the effective components can be accurately judged based on the combustion detection of the spectrum. The Planar Laser Induced Fluorescence (PLIF) can detect specific components in the presence of hundreds of different substances in a combustion environment, extract a large number of characteristic variables reflecting combustion characteristic changes, qualitatively analyze the influence of each characteristic variable on combustion stability, analyze the distribution of flame combustion intermediate products and know the influence components of the flame combustion stability, and explore the influence factors of the combustion stability from the aspect of combustion mechanism, but the cost is too high, so that the PLIF is not suitable for wide application.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a combustion state monitoring device based on spectral characteristics and a monitoring method thereof, which can supplement the traditional temperature and pressure detection results, realize the detection of more parameters, so that a central control system can perform more accurate combustion control, and realize accurate evaluation of the combustion state of an industrial furnace.
The invention adopts the following technical scheme:
the utility model provides a combustion state monitoring devices based on spectral feature, including central control system, the monitoring processing module, optic fibre bundle and probe, the probe sets up in the industrial furnace combustion chamber, a collection and transmission for realizing optical signal, optic fibre bundle includes both ends joint and peridium thing, the both ends joint of optic fibre bundle respectively with monitoring processing module and probe connection, monitoring processing module is used for receiving the combustion chamber burning data that the probe gathered, carry out signal characteristic discernment and extraction, send transmission analysis result and control signal for central control system, realize industrial furnace combustion state monitoring.
Specifically, the monitoring processing module comprises a circuit board and a circuit board shell, the circuit board is arranged in the circuit board shell, the circuit board is provided with an ARM processor, a 485 communication module, a power supply module, a spectrum sensor and an analysis module, the ARM processor is connected with the central control system through the 485 communication module, the ARM processor is connected with the spectrum sensor through a data acquisition module, and the power supply module and the analysis module are connected with the ARM processor respectively.
Furthermore, a probe interface is arranged on the circuit board shell, the spectrum sensor is fixed on the inner surface of the circuit board shell, and the front surface of the spectrum sensor faces one end of the optical fiber bundle in the probe interface.
Furthermore, two end faces of the optical fiber bundle are planes, and the optical fiber bundle comprises at least 200 quartz optical fibers and is used for transmitting light with the wavelength of 400-800 nm.
Furthermore, a cable interface and a power interface are respectively arranged on the circuit board shell, one end of the cable interface is connected with the 485 communication module through a flat cable, the other end of the cable interface is connected with the central control system, one end of the power interface is connected with the power module, and the other end of the power interface is connected with the direct-current stabilized voltage power supply.
Further, the ARM processor adopts I2The C bus is connected with the spectrum sensor through the data acquisition module, the spectrum sensor is connected with the data acquisition module through the flexible flat cable, and the image information forms intensity after being acquiredAnd intensity information of the red channel, the green channel and the blue channel is subjected to small-window time domain signal smoothing processing, and spectral feature representation is realized by utilizing a digital filter.
Further, the spectrum sensor comprises a CCD with a filter and a microprocessor.
Furthermore, the analysis module is connected with the feature library through a memory, and light path introduction, spectrum detection, data processing and storage, feature extraction, analysis comparison and communication control are realized through the ARM processor.
Specifically, the probe comprises a shell, a lens, an optical fiber cavity and a protective gas pipeline are arranged in the shell, a lens cover is arranged on the shell at the front end of the lens, the lens is connected with an optical fiber bundle in the optical fiber cavity, the protective gas pipeline is connected with the lens cover and used for opening the lens cover, the shell is made of stainless steel, and the lens is a quartz glass lens.
The invention also discloses a monitoring method of the combustion state monitoring device based on the spectral characteristics, firstly before the work is started, the protective gas blows off the lens cover of the probe, and sweeps the lens interface to remove dust; then the optical fiber bundle is electrified to work, the spectrum sensor receives optical signals transmitted by the optical fiber bundle, converts the optical signals into time sequence signals containing light intensity and color and sends the time sequence signals to the ARM processor; the ARM processor collects data, transmits analysis data at regular time, and receives instructions of the central control system to upload working state data as required; when the monitoring device works normally, the monitoring device continuously monitors and analyzes the combustion condition to generate a state signal; the central control system carries out response control according to the working state signal, the warning signal and the accident state signal to complete monitoring;
after receiving the state signal of normal work, the central control system records the time and type of the working state and displays a green indicator lamp on the control panel;
when the working state of the furnace body deviates from the normal state, a warning state signal is given, the central control system records the working state, a yellow indicator lamp is displayed on a control panel, meanwhile, a buzzer sends out a warning sound, then the module continues to transmit a monitoring index deviating from the normal working, the central control system displays the monitoring index, and a worker performs comprehensive judgment according to the monitoring index;
accident: when flameout and combustion indexes exceeding a threshold value are monitored, and an event defined as an accident occurs, a corresponding state is output, and a control panel of the central control system displays a red indicator light and generates an alarm signal.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention relates to a combustion state monitoring device based on spectral characteristics.A probe is arranged in a combustion chamber of an industrial furnace, is connected with a monitoring processing module through an optical fiber bundle, and is connected with a central control system through the monitoring processing module, so that combustion condition information of the industrial furnace can be acquired, combustion data are accumulated, the control system is guided to realize energy-saving and emission-reducing effects, the acquired digital detection result contains rich combustion condition information, the information is favorable for evaluating the combustion condition of the whole production process, optical signals are acquired through the optical fiber bundle, no moving mechanism or consumable part is provided, the service life is long, and the interference is less; the invention can accurately identify the combustion condition, adjust the proportion of fuel and air quantity through a control system, not only can reduce pollutant emission and promote energy conservation and emission reduction, but also can fully use the fuel, reduce fuel consumption and reduce cost.
Furthermore, an ARM processor in the monitoring processing module is connected with the spectrum sensor through the data acquisition module, the acquired optical characteristics comprise more information such as combustion stability information, fuel composition information, combustion temperature information and the like relative to the information of whether the combustion is performed, and the cost can be reduced by acquiring the optical characteristics in a specific range, so that the industrial production requirements are met. The communication interface adopts 485 protocol, realizes high stable data communication, and historical data and real-time data can be transmitted to the central control system program through the 485 interface.
Furthermore, the front face of the spectrum sensor faces one end of the optical fiber bundle in the probe interface, and two end faces of the optical fiber bundle are planes and comprise at least 200 quartz optical fibers for transmitting the combustion spectrum with the wavelength of 200-800 nm. The planar optical fiber bundle is easy to butt joint with the sensor to obtain a comprehensive spectrum signal. The color distribution of the combustion flame is wide, the wavelength range can reflect the spectrum generated by most combustion working conditions, and the spectrum is easy to transmit through optical fibers.
Further, the ARM processor adopts the I2C bus to be connected with the spectral sensor through the data acquisition module, be connected through flexible flat cable between spectral sensor and the data acquisition module, image information forms the intensity information of four passageways of intensity, red, green, blue after being gathered, carry out little window time domain signal smooth processing, utilize digital filter to realize the spectral feature and show, can acquire the combustion information of a scope, and not only a local combustion information, to great space, can obtain special whole combustion characteristic, need not set for more combustion probes.
Further, the spectral sensor includes a filtered CCD and a microprocessor. There are sensors of many models on the market, and the array of CCD shows that the filter window of different colours has been set up, has realized the separation of color, has also included the color conversion function based on microprocessor simultaneously, encodes into the transmission form of I2C, chooses for use the chip based on this mode can reduce the whole cost of product.
Furthermore, a lens cover is arranged on the shell at the front end of the lens, the lens is connected with the optical fiber bundle in the optical fiber cavity, and the protective gas pipeline is connected with the lens cover and used for opening the lens cover. The quartz glass lens has the advantages of high temperature resistance, wear resistance and long service life, and is suitable for the working conditions of industrial furnaces. The purpose of using the protective gas is to reduce the temperature and reduce the temperature generated by the long-time high-temperature barbecue of the lens.
The invention also discloses a monitoring method of the combustion state monitoring device based on the spectral characteristics, after the central control system receives the state signal of normal work, the time and the type of the work state are recorded, and a green indicator light is displayed on the control panel; when the working state of the furnace body deviates from the normal state, a warning state signal is given, the central control system records the working state, a yellow indicator lamp is displayed on the control panel, meanwhile, a buzzer sends out warning sound, then the module continues to transmit monitoring indexes deviating from the normal work, the central control system displays the monitoring indexes, and workers perform comprehensive judgment according to the monitoring indexes; when flameout and combustion indexes exceeding a threshold value are monitored, and an accident defined as an accident occurs, a corresponding state is output, a control panel of a central control system displays a red indicator light and generates an alarm signal, the whole monitoring method is simple to operate, can realize pulverized coal combustion and garbage combustion flame detection, can analyze compound or gas components, can be applied to detection in aspects of chemiluminescence and immunofluorescence, can judge the content of an object to be detected according to the range of colors, can detect substances including bacteria, specific protein, metabolites and the like according to different experimental systems, and can be used for pesticide residue detection, melon, fruit and vegetable quality detection, nutrient component detection, medical marker detection and the like.
In conclusion, the invention can realize combustion detection containing spectral characteristics at lower cost, and is suitable for the fields of activated carbon manufacture and the like, and the detection field of fuel combustion component monitoring.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an optical probe according to the present invention.
Wherein: 1. a central control system; 2. a cable interface; 3. a circuit board; 4.485 a communication module; 5. a power interface; 6. a power supply module; 7. a data acquisition module; 8. a spectral sensor; 9. a probe interface; 10. a fiber optic bundle; 11. a protective sleeve; 12. a lens; 13. a probe; an ARM processor; 15. an analysis module; 16. a memory; 17. a feature library; 18. the inside of the furnace body; 19. a fiber cavity; 20. a housing; 22. a lens cover; 23. and (4) protecting the gas pipeline.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a combustion state monitoring device based on spectral characteristics, which is characterized in that a probe installed in a combustion chamber is connected with the monitoring device through an optical fiber, the luminous characteristics generated by high-temperature gas and solid are transmitted to a spectral sensor of the monitoring device through the optical fiber, an ARM processor respectively runs a data acquisition program, a data analysis program, a data management program and a communication interface program, combustion data are acquired through a control program, signal characteristic identification and extraction are carried out through the data analysis program, and an analysis result and a control signal are transmitted to a central control system through the communication interface program, so that accurate monitoring of the combustion condition under a specific working condition is realized, the combustion efficiency is improved, and the combustion state monitoring of an industrial furnace is realized.
Referring to fig. 1, the combustion state monitoring device based on spectral characteristics of the present invention includes a central control system 1, a monitoring processing module, an optical fiber bundle 10 and a probe 13, wherein the central control system 1 is connected to the monitoring processing module through a cable, the optical fiber bundle 10 includes a connector and a coating at two ends, the connectors at two ends of the optical fiber bundle 10 are respectively used for connecting the monitoring processing module and the probe 13, the probe 13 is located inside a furnace body 18 and is disposed in a combustion chamber of an industrial furnace, and the probe 13 includes a convex lens and an optical path system for collecting and transmitting optical signals, thereby completing monitoring of the combustion state of the industrial furnace.
The monitoring processing module comprises a 485 communication module 4, a power module 6, an ARM processor 14, an analysis module 15, a memory 16, a feature library 17, a data acquisition module 7 and a spectrum sensor 8 which are respectively arranged on a circuit board 3, the circuit board 3 realizes physical connection of electronic components, the ARM processor 14 is connected with a cable interface 2 arranged on a shell of the circuit board 3 through the 485 communication module 4, the cable interface 2 is used for connecting a central control system 1, the ARM processor 14 is connected with a power interface 5 arranged on the shell of the circuit board 3 through the power module 6, the power interface 5 is used for connecting a direct current stabilized voltage power supply, and the ARM processor 14 is connected with the feature library 17 through the analysis module 15 and the memory 16 in sequence; the ARM processor 14 is connected with the spectrum sensor 8 through the data acquisition module 7, and the spectrum sensor 8 is opposite to one end of the optical fiber bundle 10 in the probe interface 9 on the shell of the circuit board 3.
The optical fiber bundle 10 comprises at least 20 quartz optical fibers, two end faces are planes, good contact can be formed between the optical fiber bundle and the spectrum sensor 8, 400-800 nm light can be transmitted, a high-temperature-resistant coating layer wraps the outside of the optical fiber bundle, bending can be formed to a certain degree, transmission and leading-in of optical signals of the combustion chamber are achieved, physical isolation between the spectrum sensor 8 and the combustion chamber is formed, and reliability of detection signals is guaranteed.
The ARM processor 14 is connected to the spectral sensor 8 by a bus, which is an I2C bus.
The ARM processor 14 runs an embedded linux system and a binary main control program by adopting a low-power ARM chip, and the control program comprises the following subprograms: an optical signal acquisition subroutine, a data subroutine, a communication subroutine, a data management subroutine, etc.
The ARM processor 14 functions to perform light path introduction, spectrum detection, data processing and storage, feature extraction, analysis, comparison, communication, and control. The control program can be conveniently upgraded and replaced by replacing the SD card or by the control program of the central control system 1.
The spectrum sensor 8 is fixed on the inner surface of the circuit board shell, the front surface of the spectrum sensor 8 faces to an interface of the optical fiber bundle 10, the spectrum sensor 8 is connected with the data acquisition module 7 through a flexible flat cable, and after image information is acquired, intensity information of four channels of intensity, red, green and blue is formed. And smoothing the time domain signal of the small window, and expressing the spectral characteristics by using a digital filter. And the data analysis program extracts and identifies the characteristics of the data.
The spectrum signal detection is realized by using a CCD with a filter and a spectrum sensor 8 of a microprocessor, such as TCS3771, color information and light intensity information can be obtained, and the micro-kernel is used for realizing the communication with ARM.
The whole monitoring module circuit is packaged in a shell of a circuit board 3, a cable interface 2 on the circuit board shell is used for being connected with a central control system 1 through a 485 communication module 4, a power interface 5 on the circuit board shell is used for being connected with a 24V or 5V direct-current power supply, and a probe interface 9 on the circuit board shell is used for being connected to a probe 13 in a combustion cavity through an optical fiber bundle 10.
The power module 6 is fixed on the circuit board 3 and is connected to the power interface 5 on the circuit board housing through a wire. The 485 communication module 4 is fixed on the circuit board 3 and is connected to the cable interface 2 on the circuit board shell through a flat cable to realize protocol communication; the connection between the electronic components conforms to the working requirements and connection logic of the microprocessor.
The circuit board 3 is also provided with an SD card slot, a Jtag debugging interface, a USB debugging interface, a sensor interface, a resistor, a capacitor and other electronic elements, and all the interfaces and the electronic elements are connected with the ARM processor 14 through a printed circuit.
Referring to fig. 2, the probe 13 includes a housing 20, an optical fiber cavity 19, a lens 12, a lens cover 22 and a protective gas pipe 23, the housing 20 is installed in the combustion chamber, the lens 12 is disposed in the housing 20, the lens cover 22 is disposed on the housing 20 at the front end of the lens 12, the lens 12 is connected to the optical fiber bundle 10 conducting images in the optical fiber cavity 19, the protective gas pipe 23 is disposed in the housing 20, one end of the protective gas pipe is connected to the lens cover 22, the housing 20 is made of stainless steel, the lens 12 is a quartz glass lens, the lens cover 22 can be blown open by gas, and when the work stops, the lens cover 22 will automatically shield the lens 12 due to gravity to protect the lens.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The combustion state monitoring device based on spectral characteristics is installed in a control box before being used so as to be integrated with other control devices, and a mounting hole of a probe 13 is reserved on the wall of an industrial furnace and is opposite to a combustion area in the furnace. The probe 13 is arranged behind the furnace body and is connected with the probe interface 9 on the circuit board 3 through the optical fiber bundle 10, and one end of the optical fiber bundle 10 is opposite to the spectrum sensor 8 on the circuit board 3.
Before the monitoring device works, a 24V or 5V direct-current power supply is switched on through a power supply interface 5 on the circuit board 3, the power supply interface 5 is connected with a power supply module 6 on the circuit board 3, and meanwhile, a communication interface is connected to the central control system 1, so that data acquisition, control signal acquisition and state monitoring signals are realized.
Optical characteristics of a substance combustion state in the furnace body form image signals, the image signals are collected by the lens 12 and transmitted to the spectrum detector 8 through the optical fiber bundle 10, color recognition and AD conversion are carried out through the data collection module 7, then the image signals are connected to the ARM processor 14 through a signal wire, and data analysis and judgment are carried out through the ARM processor 14 to form a real-time analysis result.
The ARM processor 14 is connected to the 485 communication module 4 through an isolation circuit, and the ARM processor 14 generates a control signal according to an analysis result and transmits the control signal to the communication interface through the connection.
In order to realize normal operation and data processing, the monitoring device runs an embedded Linux system and is realized by a binary control program burnt in the memory 16.
The program comprises a plurality of subprograms, and the realization functions comprise:
signal conversion: color components are acquired and converted by using a CCD-based color sensing device, and information representing the color and the spectrum of the flame is formed.
Analyzing and processing data: and carrying out amplitude identification and frequency characteristic extraction on the flame information to form an evaluation parameter of the combustion condition. And simultaneously, data communication is carried out according to the analysis result and the transmission protocol, so that the output of the analysis result is realized.
State detection: and the program matches with the stored flame characteristic pattern according to the data analysis result to obtain the functions of combustion state, combustion composition, flameout alarm and the like.
The specific working process is as follows:
before the work starts, the protective gas blows the lens cover 22 of the probe 13, sweeps the interface of the lens 12, removes dust, cleans the surface and prevents light from being shielded by the dust.
The monitoring device automatically starts to work after being electrified, and the spectrum sensor 8 receives and converts the optical signal transmitted by the optical fiber bundle 10 to form a time sequence signal containing light intensity and color.
The ARM processor 14 is used for data acquisition, transmitting analysis data at regular time and receiving instructions of the central control system 1. And uploading the working state data as required according to the instruction of the central control system 1.
The 485 communication module 4 is connected to a communication interface of the central control system 1 through the cable interface 2, historical data can be transmitted according to instructions of the central control system 1, and the central control system 1 stores the acquired data in a file.
The internal memory 16 of the monitoring device can cyclically delete the old data and store the new data after the storage capacity is used up.
During normal work, the monitoring device continuously monitors and analyzes the combustion condition to generate a state signal.
The response of the central control system 1 mainly depends on the judgment of the status signal, and specifically includes the following three statuses:
and (4) working normally, namely after the central control system 1 receives a state signal of working normally, recording the time and the type of the working state, and displaying a green indicator lamp on a control panel.
And warning, namely giving a warning state signal when the module judges that the working state of the furnace body deviates from the normal state. The central control system 1 records the working state, and displays a yellow indicator lamp on the control panel, and simultaneously, the buzzer gives out warning sound. Then the module will continue to transmit the monitoring index deviating from normal operation, and the central control system 1 will display the monitoring index. And the staff carries out comprehensive judgment according to the monitoring index.
Accident: when the module monitors that flameout and combustion indexes exceed a threshold value and the like, an event defined as an accident occurs, a corresponding state is output, and the control panel of the central control system 1 displays a red indicator light and generates an alarm signal.
The device carries out spectrum detection based on the optical fiber bundle and can be widely applied to the detection of optical characteristics. Can detect to the flame burning condition at present, the later stage can be used to other fields that need carry out the spectral detection, and specific field is as follows:
pulverized coal combustion detection, namely, the pulverized coal is high in carbon content and different in flame color during combustion. Pulverized coal combustion detection can be realized by adjusting parameters;
secondly, detecting the garbage combustion flame, namely detecting the components and the combustion condition of the garbage by setting proper parameters when the garbage is combusted, wherein the components are different;
analysis of compound components, namely, when medical wastes, biochemical experiment waste liquid and other substances are combusted, flame turns blue, and the device can carry out combustion detection on the substances and carry out preliminary analysis on the components of the compounds in the substances;
detecting the comprehensive components of the fuel gas, wherein the flame characteristics of the fuel gas with different components are different, and different combustion components can be detected and separated through characteristic identification;
and the module can be used for the detection of chemiluminescence and immunofluorescence.
In this case, the test system is capable of generating liquids or surfaces of different colors when testing the sample. By means of a suitable probe, light can be directed into the spectral sensor for color detection.
According to the color range, the content of the object to be detected can be judged. According to different experimental systems, the kit can detect substances including bacteria, specific proteins, metabolites and the like, and can be used for pesticide residue detection, quality detection of fruits and vegetables, nutrient component detection, medical marker detection and the like.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (5)
1. The utility model provides a combustion state monitoring devices based on spectral feature, a serial communication port, including central control system (1), monitoring processing module, optic fibre bundle (10) and probe (13), probe (13) set up in the industrial furnace combustion chamber, be used for realizing the collection and the transmission of optical signal, optic fibre bundle (10) are including both ends joint and peridium, the both ends joint of optic fibre bundle (10) is connected with monitoring processing module and probe (13) respectively, monitoring processing module is used for receiving the combustion chamber burning data that probe (13) gathered, carry out signal characteristic discernment and extraction, send transmission analysis result and control signal to central control system (1), realize industrial furnace combustion state monitoring, monitoring processing module includes circuit board (3) and circuit board casing, circuit board (3) set up in the circuit board casing, be provided with ARM treater (14) respectively on circuit board (3), ARM, 485 communication module (4), power module (6), spectrum sensor (8) and analysis module (15), ARM treater (14) is connected with central control system (1) through 485 communication module (4), ARM treater (14) is connected with spectrum sensor (8) through data acquisition module (7), power module (6) and analysis module (15) are connected with ARM treater (14) respectively, analysis module (15) is connected with characteristic library (17) through memory (16), realize light path import, spectrum detection, data processing and storage, characteristic extraction and analysis comparison and communication control through ARM treater (14), be provided with probe interface (9) on the circuit board casing, spectrum sensor (8) is fixed at the internal surface of circuit board casing, spectrum sensor (8) front face is towards the one end of optic fibre bundle (10) in probe interface (9), two end faces of the optical fiber bundle (10) are planes, the optical fiber bundle comprises at least 200 quartz optical fibers and is used for transmitting light with the wavelength of 400-800 nm, and the ARM processor (14) adopts I2The C bus is connected with the spectrum sensor (8) through the data acquisition module (7), the spectrum sensor (8) is connected with the data acquisition module (7) through the flexible flat cable, and the image information is acquired to form four channels of intensity, red, green and blueAnd smoothing the small-window time domain signal according to the intensity information, and realizing spectral feature representation by using a digital filter.
2. The combustion state monitoring device based on the spectral characteristics of claim 1, wherein a cable interface (2) and a power interface (5) are respectively arranged on the circuit board shell, one end of the cable interface (2) is connected with the 485 communication module (4) through a flat cable, the other end of the cable interface is connected with the central control system (1), one end of the power interface (5) is connected with the power module (6), and the other end of the power interface is connected with a direct current stabilized power supply.
3. A device for monitoring the state of combustion based on spectral characteristics according to claim 1, characterized in that the spectral sensor (8) comprises a CCD with filters and a microprocessor.
4. The combustion state monitoring device based on the spectral characteristics according to claim 1, wherein the probe (13) comprises a housing (20), a lens (12), an optical fiber cavity (19) and a protective gas pipeline (23) are arranged in the housing (20), a lens cover (22) is arranged on the housing at the front end of the lens (12), the lens (12) is connected with the optical fiber bundle (10) in the optical fiber cavity (19), the protective gas pipeline (23) is connected with the lens cover (22) and used for opening the lens cover (22), the housing (20) is made of stainless steel, and the lens (12) is a quartz glass lens.
5. A monitoring method using the combustion state monitoring device based on the spectral characteristics of any one of claims 1 to 4, characterized in that firstly before the work is started, the lens cover of the probe is blown open by the protective gas, and the lens interface is purged to remove dust; then the optical fiber bundle is electrified to work, the spectrum sensor receives optical signals transmitted by the optical fiber bundle, converts the optical signals into time sequence signals containing light intensity and color and sends the time sequence signals to the ARM processor; the ARM processor collects data, transmits analysis data at regular time, and receives instructions of the central control system to upload working state data as required; when the monitoring device works normally, the monitoring device continuously monitors and analyzes the combustion condition to generate a state signal; the central control system carries out response control according to the working state signal, the warning signal and the accident state signal to complete monitoring;
after receiving the state signal of normal work, the central control system records the time and type of the working state and displays a green indicator lamp on the control panel;
when the working state of the furnace body deviates from the normal state, a warning state signal is given, the central control system records the working state, a yellow indicator lamp is displayed on a control panel, meanwhile, a buzzer sends out a warning sound, then the module continues to transmit a monitoring index deviating from the normal working, the central control system displays the monitoring index, and a worker performs comprehensive judgment according to the monitoring index;
accident: when flameout and combustion indexes exceeding a threshold value are monitored, and an event defined as an accident occurs, a corresponding state is output, and a control panel of the central control system displays a red indicator light and generates an alarm signal.
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| CN201810580881.7A CN108592078B (en) | 2018-06-07 | 2018-06-07 | Combustion state monitoring device and method based on spectral characteristics |
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| US7289032B2 (en) * | 2005-02-24 | 2007-10-30 | Alstom Technology Ltd | Intelligent flame scanner |
| ES2346000T3 (en) * | 2006-08-25 | 2010-10-07 | Abb Research Ltd | FLAME DETECTOR BASED ON A CAMERA. |
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