CN115060680A - Test platform for interference of environmental medium on flame spectrum transmittance - Google Patents
Test platform for interference of environmental medium on flame spectrum transmittance Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J2003/283—Investigating the spectrum computer-interfaced
- G01J2003/2833—Investigating the spectrum computer-interfaced and memorised spectra collection
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Abstract
The invention provides a test platform for testing interference of an environmental medium on flame spectrum transmittance, which comprises a flame generating device for generating flame, a medium filling chamber, an environmental medium generating device capable of providing the environmental medium into the medium filling chamber, a heating device for heating a sensor lens, an infrared spectrometer and a data analysis system connected with the infrared spectrometer, wherein the medium filling chamber is used for accommodating the medium; the environment medium generating device is positioned outside the medium charging chamber and can provide one or more of simulated sunlight, simulated PM particles and water mist to the medium charging chamber. The invention can obtain the spectrogram of single pool fire, the spectrogram of pool fire penetrating through the sensor lens and a single environment medium, and the spectrogram of pool fire penetrating through the sensor lens and multiple environment media, and obtains the interference condition of single or multiple environment media to the flame spectrum transmittance by comparing and analyzing the spectrograms, thereby providing a basis for further improving the remote spectrum acquisition precision.
Description
Technical Field
The invention belongs to the field of flame spectrum transmittance testing, and particularly relates to a test platform for interference of an environmental medium on flame spectrum transmittance.
Background
In recent years, sudden large-scale fire accidents frequently occur at home and abroad, so that great economic loss, casualties and damage to ecological environment are caused, and serious influence is brought to the society. The existing ground monitoring means has short monitoring distance and can only acquire local point location fire information. Meanwhile, the potential safety hazard of the monitoring equipment is large, and the requirements of emergency monitoring and quick response cannot be met. Space flight and aviation monitoring modes such as satellites and unmanned planes are the best way for monitoring large-scale fire.
The detection and extraction of the spectral characteristics of the combustion flame are the basis for monitoring the fire pollution. However, the lens of the sensor is very vulnerable to interference from environmental media (such as sunlight intensity, air humidity, air quality index, etc.) during the remote monitoring process. Particle scattering, refraction, absorption, etc. in air all contribute to the transmittance of the lens of the sensor, thereby contributing considerably to flame spectroscopy.
Therefore, it is necessary to construct a test platform between the flame spectrum and the environment medium to study the influence of the environment medium interference on the flame spectrum transmittance, and a basis is provided for further improving the remote spectrum acquisition precision.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and aims to provide a test platform for the interference of an environmental medium on the spectral transmittance of flame.
In order to achieve the purpose, the invention adopts the following technical scheme: the test platform for the interference of the environmental medium on the spectral transmittance of the flame comprises a flame generating device for generating flame, a medium filling chamber, an environmental medium generating device capable of providing the environmental medium for the medium filling chamber, a heating device for heating a sensor lens, an infrared spectrometer and a data analysis system connected with the infrared spectrometer; the environment medium generating device is positioned outside the medium filling chamber and can provide one or more of simulated sunlight, simulated PM particles and water mist to the medium filling chamber; the medium fills room and sensor lens and establishes in proper order in the light path of flame to infrared spectrometer, and infrared spectrometer can fill the room into through the medium that does not fill into the environment medium and scan the flame that flame generation device produced, and infrared spectrometer can fill the room into the flame that flame generation device produced into through the medium that fills into the sensor lens and do not fill into the environment medium and scan, and infrared spectrometer can fill the room into the flame that flame generation device produced into through the medium that the sensor lens and fill into the environment medium and scan to transmit the scanning result for data analysis system.
In the technical scheme, the flame generating device can generate flame, so that a sufficient normal combustion environment of the flame is provided; the infrared spectrometer is a full-wave band spectral measurement tool; the medium filling chamber is arranged in a light path between the infrared spectrometer and the flame and can simulate the variables of sunlight, PM particles and humidity in the environment; the heating device heats the sensor lens in order to simulate the effect of temperature on the transmittance of the sensor lens when in proximity to a flame. The invention can obtain the spectrogram of single pool fire, the spectrogram of pool fire introduced into a single environment medium, the spectrogram of pool fire introduced into a plurality of environment media, the spectrogram of pool fire penetrating through the sensor lens and the single environment medium, and the spectrogram of pool fire penetrating through the sensor lens and the plurality of environment media.
In a preferred embodiment of the present invention, the flame generating device includes a fuel tank, and a combustion chamber connected to the fuel tank through an air supply pipe and capable of generating a flame.
In a preferred embodiment of the invention, the environmental medium generating device comprises one or more of a sunlight simulating device, an aerosol generator and a humidity generator; sunlight simulated by the sunlight simulating device can be injected into the medium and filled into the room, and the sunlight simulating device can simulate sunlight with different illumination intensities; and/or the aerosol generator is connected with the medium charging chamber through a pipeline, and the aerosol generator can generate aerosol particles with different particle sizes and/or concentrations; and/or a humidity generator is connected with the medium filling chamber through a pipeline, and the humidity generator can generate water mist with different concentrations.
In the technical scheme, the sunlight simulating device is used for simulating the influences of sunlight on scattering, refraction and the like of an environment medium and testing the influences of different sunlight on the flame spectrum transmittance; the aerosol generator is used for simulating PM particles with different particle sizes and concentrations and testing the influence of different PM particles on the flame spectrum transmittance; the humidity generator is used for simulating moisture in the environment, namely simulating the humidity of the environment, and testing the influence of different humidities on the spectral transmittance of the flame.
In a preferred embodiment of the present invention, the sunlight simulating device includes a replaceable light source, a sunlight simulating filter, an optical integrator, and a reflector, wherein light emitted from the light source is filtered by the sunlight simulating filter and then emitted to the optical integrator, integrated by the optical integrator and then emitted to the reflector, and reflected by the reflector and then emitted to the medium filled in the room.
Among the above-mentioned technical scheme, through changing different kinds of light sources, adjust the luminous intensity of light source, the sunlight of simulation different intensity.
In a preferred embodiment of the present invention, the light source and the sunlight simulation filter are in one optical path or not in one optical path; when the light source and the sunlight simulation optical filter are not in the same light path, a reflector is arranged between the light source and the sunlight simulation optical filter, and light emitted by the light source is reflected by the reflector and then is emitted to the sunlight simulation optical filter.
In a preferred embodiment of the present invention, a lens mounting groove is provided between the medium charging chamber and the infrared spectrometer, the sensor lens is detachably mounted in the lens mounting groove, the heating device is a heating wire with adjustable power for heating the lens and mounted in the lens mounting groove, and a thermometer for measuring the temperature of the sensor lens is further mounted on the lens mounting groove.
Among the above-mentioned technical scheme, install the sensor lens through setting up the lens mounting groove, can simulate the lens that various sensors used. The thermometer is used for monitoring the temperature of the sensor lens; the heating device adopts the heating wire, has simple structure and low cost, and meets the use function.
In another preferred embodiment of the invention, through holes are formed in both the side of the medium filling chamber close to the flame and the side of the medium filling chamber close to the infrared spectrometer, observation windows made of high-temperature-resistant quartz glass and used for plugging the through holes are arranged in both the through holes, and the infrared spectrometer can scan the flame generated by the flame generating device through the observation windows on both sides of the medium filling chamber.
In the technical scheme, the observation windows arranged on the two sides of the medium filling chamber are made of high-temperature-resistant quartz glass, and the light path from the flame to the infrared spectrometer is not affected.
In another preferred embodiment of the present invention, when the environmental medium generating means is capable of generating PM particles, the medium charging chamber is further connected to a suction pump capable of sucking out the PM particles charged into the chamber, and an outlet of the suction pump is connected to an air cleaning system for treating the PM particles.
In the technical scheme, the suction pump is used for quickly pumping out PM particles filled in the chamber by a medium, so that a subsequent test is facilitated; the air cleaning system is used for treating the extracted PM particles, and the PM particles after the test are prevented from polluting the environment.
In another preferred embodiment of the present invention, the air cleaning system comprises a housing having an inlet and an outlet, the outlet of the suction pump is connected to the inlet of the housing, the outlet of the housing is provided with an exhaust fan, and the housing is provided with at least one filter screen and at least one anion absorption layer in sequence along the flow direction of the air.
Among the above-mentioned technical scheme, the particulate matter that pumps through the suction pump gets into the exhaust air after the anion absorbed layer accomplishes the secondary absorption through the primary filtration of filter screen, and experimental back particulate matter is collected in the filtration that can be fine.
In another preferred embodiment of the present invention, when the environmental medium generating means is capable of generating mist, the medium charging chamber is further connected to a dehumidifier capable of extracting vapor from the medium charging chamber, and an outlet of the dehumidifier is connected to the sump.
Among the above-mentioned technical scheme, the dehumidifier can be quick take out the aqueous vapor of filling the room with the medium to the catch basin in, be convenient for carry out follow-up test.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a platform for testing interference of spectral transmittance of ambient medium to flame in an embodiment of the present application.
Reference numerals in the drawings of the specification include: the device comprises a combustion tank 1, a fuel tank 2, an air supply valve 201, a flow meter 202, a transparent baffle 3, an observation window 4, a medium charging chamber 5, a sunlight simulation device 6, a first reflecting mirror 71, a second reflecting mirror 72, an optical integrator 8, a sunlight simulation optical filter 9, a light source 10, a thermometer 11, a lens mounting groove 12, a heating device 13, an infrared spectrometer 14, a data analysis system 15, an aerosol generator 16, a humidity generator 17, a dehumidifier 18, a water collecting tank 19, a suction pump 20, an air cleaning system 21, a filter screen 22, a negative ion absorption layer 23, an exhaust fan 24, a box body 25 and a shelf 26.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and those skilled in the art will understand the specific meaning of the terms as they are used in the specific case.
The invention provides a test platform for testing the spectral transmittance interference of an environmental medium to flame, which comprises a flame generating device for generating flame, a medium filling chamber 5, an environmental medium generating device capable of providing the environmental medium into the medium filling chamber 5, a heating device 13 for heating a sensor lens, an infrared spectrometer 14 and a data analysis system 15 connected with the infrared spectrometer 14, wherein the environmental medium generating device is used for supplying the environmental medium into the medium filling chamber 5, as shown in figure 1. Wherein the environment medium generating device is located outside the medium charging chamber 5 and can supply one or more of the simulated sunlight, the simulated PM particles and the water mist into the medium charging chamber 5.
The flame generating device comprises a fuel tank 2 and a combustion pool 1 which is connected with the fuel tank 2 through an air supply pipe and can generate flame, wherein the air supply pipe is provided with a flow meter 202, and the flow meter 202 adopts a glass rotameter 202 and is used for controlling the flow rate of the gas of the air supply pipe so as to adjust the flame burned in the combustion pool 1.
The infrared spectrometer 14 of the invention adopts a Fourier transform infrared spectrometer, is a full-wave band and high-precision spectral measurement and monitoring instrument, the data analysis system 15 can adopt a computer, and the signal output end of the infrared spectrometer 14 is connected with the computer. The medium charging chamber 5 is a closed space, and the medium charging chamber 5 and the sensor lens are sequentially arranged in a light path from the flame to the infrared spectrometer 14. The infrared spectrometer 14 can scan the flame generated by the flame generating device through the medium charging chamber 5 which is not charged with the environment medium, the infrared spectrometer 14 can scan the flame generated by the flame generating device through the sensor lens and the medium charging chamber 5 which is not charged with the environment medium, and the infrared spectrometer 14 can scan the flame generated by the flame generating device through the sensor lens and the medium charging chamber 5 which is charged with the environment medium and transmit the scanning result to the data analysis system 15.
For example, the infrared spectrometer 14 is located at the rightmost side, the lens mounting groove 12 for mounting the sensor lens is located at the left side of the infrared spectrometer 14, the medium charging chamber 5 is located at the left side of the lens mounting groove 12, the flame generated by the combustion chamber 1 is located at the left side of the medium charging chamber 5, and the flame generated by the combustion chamber 1, the medium charging chamber 5, the sensor lens and the infrared spectrometer 14 are located on one light path.
The lens mounting groove 12 of the present invention is located between the medium charging chamber 5 and the infrared spectrometer 14, the lens mounting groove 12 is a cylindrical through groove, the right end of the lens mounting groove 12 is used to mount lenses used by different sensors, and the sensor lenses are detachably connected with the lens mounting groove 12, such as clamped connection or threaded connection. The heating device 13 is a heating wire with adjustable power for heating the lens, which is installed in the lens mounting groove 12, and a thermometer 11 for measuring the temperature of the lens of the sensor is also installed on the lens mounting groove 12, and the thermometer 11 can adopt a thermocouple.
In a preferred embodiment, the medium filling chamber 5 is provided with through holes on the left side close to the flame and on the right side close to the infrared spectrometer 14, the two through holes are provided with observation windows 4 made of high temperature resistant quartz glass and used for plugging the through holes, the observation windows 4 are hermetically cemented with the medium filling chamber 5, and the infrared spectrometer 14 can scan the flame generated by the combustion chamber 1 through the observation windows 4 on the two sides of the medium filling chamber 5.
Preferably, the environmental medium generating device of the invention can provide three environmental media of simulated sunlight, simulated PM particles and water mist. Specifically, the environmental medium generating device includes a solar light simulation device 6, an aerosol generator 16, and a humidity generator 17.
The sunlight simulating device 6 can emit the sunlight simulated by the sunlight simulating device 6 into the medium charging chamber 5, and the sunlight simulating device 6 can simulate the sunlight with different illumination intensities.
The aerosol generator 16 is connected with the medium charging chamber 5 through a pipeline, and the aerosol generator 16 can generate aerosol particles with different particle sizes for simulating PM particles with different particle sizes, such as PM2.5 particles and PM10 particles; the emission frequency of the aerosol generator 16 is adjustable, so that the concentration of aerosol particles in the medium charge chamber 5 is adjustable. Preferably, an aerosol sensor for detecting the concentration of aerosol particles inside is provided in the medium-charging chamber 5.
The humidity generator 17 is connected with the medium filling chamber 5 through a pipeline, and the humidity generator 17 can generate water mist with different concentrations, namely, the water body particles emitting gas or water mist can be controlled to simulate the environment humidity. Preferably, a humidity sensor for detecting the humidity inside the medium charging chamber 5 is provided therein.
In another preferred embodiment, the top of the medium charging chamber 5 is made of a transparent baffle 3, the transparent baffle 3 is hermetically bonded to the medium charging chamber 5, and simulated solar light can be irradiated into the medium charging chamber 5 from the top of the medium charging chamber 5 through the transparent baffle 3. The solar light simulation apparatus 6 includes a replaceable light source 10, a solar light simulation filter 9, an optical integrator 8, and a reflective mirror. The light source 10 is an artificial light source such as a metal halogen lamp, a carbon arc lamp, a halogen lamp, a tungsten filament lamp, a xenon lamp, an LED and the like, and can be replaced according to the test condition, and the power of the light source 10 can be adjusted, so that the intensity of the simulated sunlight can be adjusted. The upper portion of the transparent baffle 3 is provided with a reflective mirror which is obliquely arranged from left to right from bottom to top and is a first reflective mirror 71, the right side of the first reflective mirror 71 is provided with a vertical optical integrator 8, the right side of the optical integrator 8 is provided with a vertical sunlight simulation optical filter 9, light emitted by the light source 10 is filtered by the sunlight simulation optical filter 9 and then emitted to the optical integrator 8, disordered light is integrated into light which is uniformly irradiated through the optical integrator 8 and then emitted to the first reflective mirror 71, and the light is reflected by the first reflective mirror 71 and then emitted to the medium filling chamber 5.
In the present embodiment, the light source 10 is disposed on the top of the lens mounting groove 12, and the light generated from the light source 10 is directed upward, and a reflective mirror is disposed between the light source 10 and the solar simulator filter 9 to be inclined from left to right from top to bottom so that the light generated from the light source 10 can be incident on the solar simulator filter 9, and is a second reflective mirror 72, and the light generated from the light source 10 is reflected by the second reflective mirror 72 and then is incident on the solar simulator filter 9. The light source 10 may be provided on the right side of the solar simulator filter 9, and the light generated by the light source 10 may be directly incident on the solar simulator filter 9.
In another preferred embodiment, the medium charging chamber 5 is further connected to a suction pump 20 capable of sucking out aerosol particles in the medium charging chamber 5, the suction pump 20 is a vacuum pump, and an outlet of the suction pump 20 is connected to an air cleaning system 21 for treating aerosol particles. Specifically, the air cleaning system 21 includes a tank 25 having an inlet and an outlet, the outlet of the tank 25 being located at the right side of the inlet thereof, the outlet of the suction pump 20 being connected to the inlet at the left side of the tank 25, and the outlet of the tank 25 being mounted with a discharge fan 24. At least one filter screen 22 and at least one anion absorption layer 23 are sequentially arranged in the box 25 along the flowing direction of the gas, for example, four filter screens 22 and two anion absorption layers 23 are sequentially arranged from left to right. It should be noted that the air cleaning system 21 may also be an air cleaner of the prior art.
In another preferred embodiment, the medium charging chamber 5 is further connected to a dehumidifier 18 capable of extracting the water vapor in the medium charging chamber 5, and an outlet of the dehumidifier 18 is connected to a sump 19, and the sump 19 is used for collecting the water extracted by the dehumidifier 18.
In another preferred embodiment, the test platform further comprises a shelf 26, for example, a four-layer shelf, the left side of the shelf 26 has a space for installing the fuel tank 2, and the combustion chamber 1 is located at the leftmost side of the fourth layer of the shelf 26. The combustion pool 1, the medium charging chamber 5, the lens mounting groove 12 and the infrared spectrometer 14 are sequentially arranged on the fourth layer of the shelf 26 from left to right, and the sunlight simulation device 6 is arranged above the medium charging chamber 5 and the lens mounting groove 12; the aerosol generator 16, the dehumidifier 18 and the data analysis system 15 are arranged on the third layer of the shelf 26 from left to right in sequence; the humidity generator 17 and the water collecting tank 19 are sequentially arranged on the second layer of the shelf 26 from left to right; the suction pump 20 and the air cleaning system 21 are provided in the first floor of the rack 26 from left to right in this order.
The working principle of the invention is as follows:
first, the infrared spectrometer 14 is turned on to scan the environment.
Next, the gas supply valve 201 of the fuel tank 2 is opened and adjusted to a proper flow rate, the combustion cell 1 is ignited to generate a flame (hereinafter referred to as cell fire), the cell fire is scanned through the observation windows 4 on both sides of the medium charging chamber 5 using the infrared spectrometer 14, and a spectrogram is recorded as a comparison template. It should be noted that the observation windows 4 on both sides of the medium charging chamber 5 are made of quartz glass, and all information of the quartz glass itself including its own transmittance and the like is known, so that the observation windows 4 do not serve as an interference variable of the experiment.
Next, the required sensor lens is fixed in the lens mounting groove 12, the heating device 13 is turned on to heat the periphery of the sensor lens, the temperature of the surface of the sensor lens is monitored by the thermometer 11, and when the required temperature is reached, the infrared spectrometer 14 is used to scan the pool fire through the sensor lens. The temperature of the sensor lens is changed and the cell fire is scanned through the sensor lens using the infrared spectrometer 14 to verify the transmittance of the sensor lens at different temperatures.
Next, aerosol particles introduced into the medium charging chamber 5 are generated by the aerosol generator 16, water mist (water vapor) introduced into the medium charging chamber 5 is generated by the humidity generator 17, and simulated sunlight irradiated into the medium charging chamber 5 by the sunlight simulating device 6 is used as variables to perform tests, and the three variables can be introduced singly, introduced in two in a mixed manner, or introduced into the medium charging chamber 5 in a mixed manner.
On the premise that the sensor lens is fixed, when aerosol particles are introduced as a single variable of an environment medium, the particle size and the concentration of the aerosol particles are controlled by the aerosol generator 16, the infrared spectrometer 14 is used for scanning the pool fire through the sensor lens and the medium, and the data analysis system 15 calculates the influence of the aerosol particles with different particle sizes and concentrations on the flame spectrum transmittance by comparing a set spectrogram of the aerosol particles with spectrograms of the single pool fire and the pool fire passing through the sensor lens. Similarly, when the water mist is introduced as a single variable of the environment medium, the data analysis system 15 calculates the influence of the introduction of water mist with different concentrations (simulating different environmental humidities) on the flame spectral transmittance by comparing the set spectrogram of the water mist concentration with the spectrograms of the single pool fire and the pool fire passing through the sensor lens. Similarly, when simulated sunlight is introduced as a single variable of the environmental medium, the data analysis system 15 calculates the influence of sunlight with different strengths on the flame spectrum transmittance by comparing the set spectrogram of the sunlight strength with the spectrogram of the single pool fire and the spectrogram of the pool fire passing through the sensor lens.
After the test of letting in single aerogel granule is accomplished, open suction pump 20 and fill the aerogel granule in the room 5 with the medium and take out, the particulate matter that draws through suction pump 20 gets into in the negative ion absorbed layer 23 accomplishes the exhaust air behind the secondary absorption through the primary filtration of filter screen 22. After the single water mist test is completed, the dehumidifier 18 is started to pump out the water mist in the medium filling chamber 5 to the water collecting tank 19.
On the premise that the sensor lens is fixed, when various environment media are used as variables to be tested, aerosol particles, water mist and simulated sunlight generated by different light sources 10 need to be quantitatively introduced into the medium filling chamber 5, required parameters are set, the infrared spectrometer 14 is used for scanning the fire in the tank through the sensor lens and the various environment media, a spectrogram is recorded, and the influence of the synergy of the various environment media on the spectral transmittance is calculated through the data analysis system 15.
After the test of introducing various environment media is finished, the dehumidifier 18 is started to pump the water vapor in the medium filling chamber 5 to the water collecting tank 19, then the suction pump 20 is started to pump the dry aerogel particles in the medium filling chamber 5, and the particles pumped by the suction pump 20 are filtered by the air cleaning system 21 and then discharged into the air.
When the environment medium is introduced for testing the spectral transmittance of the flame, the testing is carried out on the premise of installing the sensor lens, so that the reality sense of flame detection in a close range by the sensor can be restored. The test can also be carried out without installing a sensor lens when the environment medium is introduced, and the sensor lens is not installed, so that the flame spectrum transmittance of the environment medium (which can be single variable, double variable or triple variable) is tested.
In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The test platform for the interference of the environmental medium on the spectral transmittance of the flame is characterized by comprising a flame generating device for generating flame, a medium filling chamber, an environmental medium generating device capable of providing the environmental medium into the medium filling chamber, a heating device for heating a sensor lens, an infrared spectrometer and a data analysis system connected with the infrared spectrometer;
the environment medium generating device is positioned outside the medium filling chamber and can provide one or more of simulated sunlight, simulated PM particles and water mist to the medium filling chamber;
the medium fills room and sensor lens and establishes in proper order in the light path of flame to infrared spectrometer, infrared spectrometer can fill the room into the flame that flame generation device produced through the medium that does not fill the environment medium and scan, infrared spectrometer can fill the room into the flame that flame generation device produced through the medium that fills the environment medium and scan through the sensor lens, infrared spectrometer can fill the flame that the room produced flame generation device into through the medium that fills the environment medium and scan to transmit the scanning result for data analysis system.
2. The platform for testing interference of spectral transmittances of environmental media to flames according to claim 1, wherein the flame generating device comprises a fuel tank and a combustion pool connected with the fuel tank through an air supply pipe and capable of generating flames.
3. The platform for testing interference of ambient medium on flame spectral transmittance according to claim 1, wherein the ambient medium generating device comprises one or more of a sunlight simulating device, an aerosol generator and a humidity generator;
sunlight simulated by the sunlight simulation device can be injected into a medium and filled into a room, and the sunlight simulation device can simulate sunlight with different illumination intensities;
and/or the aerosol generator is connected with the medium charging chamber through a pipeline, and the aerosol generator can generate aerosol particles with different particle sizes and/or concentrations;
and/or the humidity generator is connected with the medium filling chamber through a pipeline and can generate water mist with different concentrations.
4. The platform for testing interference of ambient medium on flame spectral transmittance according to claim 3, wherein the sunlight simulating device comprises a replaceable light source, a sunlight simulating filter, an optical integrator and a reflector, wherein light emitted by the light source is filtered by the sunlight simulating filter, then emitted to the optical integrator, integrated by the optical integrator, then emitted to the reflector, reflected by the reflector, and then emitted to the medium to be filled in the room.
5. The platform of claim 4, wherein the light source and the sunlight simulating filter are on one light path or not; when the light source and the sunlight simulation optical filter are not in the same light path, a reflector is arranged between the light source and the sunlight simulation optical filter, and light emitted by the light source is reflected by the reflector and then is emitted to the sunlight simulation optical filter.
6. The platform of claim 1, wherein a lens mounting groove is disposed between the medium filling chamber and the infrared spectrometer, the sensor lens is detachably mounted in the lens mounting groove, the heating device is a power-adjustable heating wire mounted in the lens mounting groove and used for heating the lens, and a thermometer for measuring the temperature of the sensor lens is further mounted on the lens mounting groove.
7. The platform for testing interference of ambient medium on spectral transmittance of flame as claimed in any one of claims 1 to 6, wherein the medium filling chamber has through holes at one side close to flame and at one side close to the infrared spectrometer, the two through holes are provided with observation windows made of high temperature resistant quartz glass for plugging the through holes, and the infrared spectrometer can scan the flame generated by the flame generating device through the observation windows at two sides of the medium filling chamber.
8. The platform for testing the spectral transmittance interference of ambient media to flames according to any one of claims 1 to 6, wherein when the ambient medium generation device can generate PM particles, the medium filling chamber is further connected with a suction pump capable of pumping out the PM particles filled in the medium filling chamber, and an outlet of the suction pump is connected with an air cleaning system for treating the PM particles.
9. The platform of claim 8, wherein the air cleaning system comprises a box having an inlet and an outlet, the outlet of the suction pump is connected to the inlet of the box, an exhaust fan is installed at the outlet of the box, and at least one filter screen and at least one negative ion absorption layer are sequentially disposed in the box along a flow direction of the gas.
10. The platform for testing the spectral transmittance interference of environmental media on flames according to any one of claims 1 to 6, wherein when the environmental media generating device can generate water mist, the media filling chamber is further connected with a dehumidifier which can extract water vapor filled in the media filling chamber, and an outlet of the dehumidifier is connected with a water collecting tank.
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