CN102967577A - Biological aerosol transmitance testing arrangement based on Fourier transform infrared spectrometer - Google Patents
Biological aerosol transmitance testing arrangement based on Fourier transform infrared spectrometer Download PDFInfo
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- CN102967577A CN102967577A CN2012103960600A CN201210396060A CN102967577A CN 102967577 A CN102967577 A CN 102967577A CN 2012103960600 A CN2012103960600 A CN 2012103960600A CN 201210396060 A CN201210396060 A CN 201210396060A CN 102967577 A CN102967577 A CN 102967577A
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Abstract
The invention relates to a biological aerosol transmitance testing arrangement based on a Fourier transform infrared spectrometer. The device comprises a smokescreen box which is provided with an inlet and an outlet, wherein a black target is located at the inlet of the smokescreen box, an infrared spectrometer is located at the outlet of the smokescreen box, the black target and the infrared spectrometer are optically coaxial, and an output of the infrared spectrometer is connected with the computer. The smokescreen box is further provided with a spraying device for spraying biological particles into the box, and a dust sampling device and a fan are located in the smokescreen box. According to the invention, the spraying device sprays biological particles into the smokescreen box so as to generate biological aerosol; and the infrared spectrometer replaces an infrared imaging device and can directly test the spectral transmittance, thereby improving test precision. Meanwhile, the device uses the self-made small smokescreen box to replace a big smokescreen box, thereby reducing size of the testing device.
Description
Technical field
The present invention relates to infrared band optic test field, especially a kind of bioaerosol transmission measurement device based on Fourier transform infrared spectrometer.
Background technology
In order to test the optical transmittance of infrared band smoke screen, in existing proving installation, a kind of device for testing optical transmittance based on infrared thermoviewer is arranged, as shown in Figure 1, this device is comprised of black matrix target a, large-scale smoke screen case b, agitation fan c, sampling head d, smoke agent sample e, infrared thermoviewer f, computing machine g.Its test process is, the first step is not having in the situation of smoke screen, after smoke screen case b is received by thermal infrared imager f, at computing machine g display clearly target Infrared Thermogram appears from the infrared heat energy of black matrix target a radiation, by the software records Infrared video image of this moment; Second step is for after passing through smoke agent sample e blanket, agitation fan c entry into service, make the interior smoke screen of smoke screen case reach the state that is evenly distributed, sampling head d gathers the concentration of smoke screen case, because smoke screen is to absorption and the scattering process of black matrix target a infrared energy, so that the black matrix target thermal map that infrared thermoviewer f receives changes, image is fogged by clear, by the corresponding Infrared video image of software records.
Program the Infrared video image that records in the above-mentioned experimentation is processed, in the computation process, the temperature of black matrix target a each several part is identical, its radiance is also identical, because radiance is directly proportional with gray scale, therefore before the smoke producing, the gray scale of black matrix target a each several part should be identical.Do not having in the blanket situation, processing the average gray value that obtains black matrix target a
And the average gray value of background certain area around the black matrix target a
Behind the blanket, process the average gray value that obtains black matrix target a
And the average gray value of background certain area around the black matrix target a
The transmitance of smoke screen infrared band
Can be got by following formula:
Because existing proving installation adopts large-scale smoke screen case, the smoke screen case b as among Fig. 1 causes proving installation bulky.In addition, by the resulting gray level image of thermal infrared imager f is carried out the calculating of Acquire Transmission of Smoke, measuring accuracy is lower.
Summary of the invention
The object of the present invention is to provide a kind of measuring accuracy that can improve thermal infrared wave band bioaerosol transmitance, reduce the bioaerosol transmission measurement device based on Fourier transform infrared spectrometer of proving installation volume.
For achieving the above object, the present invention has adopted following technical scheme: a kind of bioaerosol transmission measurement device based on Fourier transform infrared spectrometer, comprise the smoke screen case, offer import and outlet on it, the black matrix target is positioned at the inflow point with the smoke screen case, infrared spectrometer is positioned at the exit of smoke screen case, black matrix target and infrared spectrometer optics are coaxial, the output terminal of infrared spectrometer links to each other with computing machine, also be provided for shedding in case the tossed device of biologic grain on the smoke screen case, dust sampler and fan are positioned at the smoke screen case.
As shown from the above technical solution, the present invention sheds biologic grain by scattering mechanism in the smoke screen case, to form bioaerosol; Adopt infrared spectrometer to replace infrared thermoviewer, direct test spectral transmitance, thereby raising measuring accuracy.Simultaneously, the present invention adopts homemade small-sized smoke screen case to replace large-scale smoke screen case, has reduced the volume of proving installation.
Description of drawings
Fig. 1 is the structural representation of prior art,
Fig. 2 is structural representation of the present invention.
Embodiment
A kind of bioaerosol transmission measurement device based on Fourier transform infrared spectrometer, comprise smoke screen case 2, offer import 2a and outlet 2b on it, black matrix target 1 is positioned at the import 2a place with smoke screen case 2, infrared spectrometer 6 is positioned at the outlet 2b place of smoke screen case 2, black matrix target 1 and infrared spectrometer 6 optics are coaxial, the output terminal of infrared spectrometer 6 links to each other with computing machine 7, also be provided for shedding in case the tossed device 3 of biologic grain on the smoke screen case 2, dust sampler 4 and fan 5 are positioned at smoke screen case 2.As shown in Figure 2.
As shown in Figure 2, described smoke screen case 2 is the casing of a cavity, and described import and export 2a, 2b symmetry are opened on the arranged on left and right sides casing of smoke screen case 2.Described tossed device 3 is comprised of fan blower 3a and feed conduit 3b, and the air outlet of fan blower 3a is connected with the end of feed conduit 3b, and the other end of feed conduit 3b gos deep in the cavity of smoke screen case 2, the built-in biologic grain that remains to be shed of feed conduit 3b.It is dismountable that fan blower 3a is connected with feed conduit 3b, during experiment, biologic grain that at first will be to be shed is positioned in the feed conduit 3b, then connects fan blower 3a and feed conduit 3b, open the switch of fan blower 3a, by fan blower 3a air-supply biologic grain is shed to smoke screen case 2.Described dust sampler 4 is positioned at the center of smoke screen case 2 casings, and black matrix target 1, dust sampler 4 and infrared spectrometer 6 are positioned on the same horizontal center line axis.Described agitation fan 5 is positioned at the bottom of smoke screen case 2 casings.
The present invention is further illustrated below in conjunction with Fig. 2.Test process of the present invention is:
The first, do not having in the situation of bioaerosol, after making small-sized smoke screen case 2 by oneself and being received by the infrared spectrometer 6 of Fourier transform, record this moment measured value at computing machine 7 from the infrared heat energy of black matrix target 1 radiation
Second, in smoke screen case 2, shed biologic grain by scattering mechanism 3, to form bioaerosol, be used for fan 5 entrys into service of stirring, make smoke screen case 2 interior bioaerosols reach the state that is evenly distributed, dust sampler 4 gathers the concentration of the bioaerosol in the smoke screen case 2, because bioaerosol is to absorption and the scattering process of black matrix target 1 infrared energy, so that black matrix target 1 data that infrared spectrometer 6 receives change, record the measured value of this moment
The spectral transmittance of bioaerosol
Can be got by following formula:
This value can directly read by infrared spectrometer 6.
In a word, the present invention sheds biologic grain by scattering mechanism 3 in smoke screen case 2, to form bioaerosol; Adopt infrared spectrometer 6 to replace infrared thermoviewers, direct test spectral transmitance, thereby raising measuring accuracy.Simultaneously, the present invention adopts homemade small-sized smoke screen case 2 to replace large-scale smoke screen case, has reduced the volume of proving installation.
Claims (5)
1. bioaerosol transmission measurement device based on Fourier transform infrared spectrometer, it is characterized in that: comprise smoke screen case (2), offer import (2a) and outlet (2b) on it, black matrix target (1) is positioned at the import (2a) of smoke screen case (2) to be located, infrared spectrometer (6) is positioned at the outlet (2b) of smoke screen case (2) and locates, black matrix target (1) and infrared spectrometer (6) optics are coaxial, the output terminal of infrared spectrometer (6) links to each other with computing machine (7), also be provided for shedding in case the tossed device (3) of biologic grain on the smoke screen case (2), dust sampler (4) and fan (5) are positioned at smoke screen case (2).
2. the bioaerosol transmission measurement device based on Fourier transform infrared spectrometer according to claim 1, it is characterized in that: described smoke screen case (2) is the casing of a cavity, and described import and export (2a, 2b) symmetry is opened on the arranged on left and right sides casing of smoke screen case (2).
3. the bioaerosol transmission measurement device based on Fourier transform infrared spectrometer according to claim 1, it is characterized in that: described tossed device (3) is comprised of fan blower (3a) and feed conduit (3b), the air outlet of fan blower (3a) is connected with an end of feed conduit (3b), the other end of feed conduit (3b) gos deep in the cavity of smoke screen case (2), the built-in biologic grain that remains to be shed of feed conduit (3b).
4. the bioaerosol transmission measurement device based on Fourier transform infrared spectrometer according to claim 1, it is characterized in that: described dust sampler (4) is positioned at the center of smoke screen case (2) casing, and black matrix target (1), dust sampler (4) and infrared spectrometer (6) are positioned on the same horizontal center line axis.
5. the bioaerosol transmission measurement device based on Fourier transform infrared spectrometer according to claim 1, it is characterized in that: described agitation fan (5) is positioned at the bottom of smoke screen case (2) casing.
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| CN104655589A (en) * | 2015-02-04 | 2015-05-27 | 中国人民解放军电子工程学院 | Device and method for testing continuously adjustable optical path and capacity particle extinction coefficient |
| CN105137229A (en) * | 2015-08-19 | 2015-12-09 | 中国人民解放军电子工程学院 | Rapid determination method for biologic particle wave-band-cross comprehensive electromagnetic attenuation capability |
| CN106657825A (en) * | 2016-12-24 | 2017-05-10 | 中国人民解放军电子工程学院 | Testing device and method of interference effect of interference particles to photoelectric tracking system |
| CN107271318A (en) * | 2017-08-15 | 2017-10-20 | 中国人民解放军火箭军工程大学 | The mass concentration measurement apparatus and method of smoke interfered with infrared in a kind of vacuum |
| CN109060731A (en) * | 2018-06-25 | 2018-12-21 | 中国科学院西安光学精密机械研究所 | Infrared optical system spectral transmittance test device and method |
| CN113033013A (en) * | 2021-04-08 | 2021-06-25 | 北京环境特性研究所 | Infrared smoke screen spectrum transmittance simulation method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655589A (en) * | 2015-02-04 | 2015-05-27 | 中国人民解放军电子工程学院 | Device and method for testing continuously adjustable optical path and capacity particle extinction coefficient |
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| CN106657825A (en) * | 2016-12-24 | 2017-05-10 | 中国人民解放军电子工程学院 | Testing device and method of interference effect of interference particles to photoelectric tracking system |
| CN106657825B (en) * | 2016-12-24 | 2023-08-04 | 中国人民解放军电子工程学院 | Device and method for testing interference effect of interference particles on photoelectric tracking system |
| CN107271318A (en) * | 2017-08-15 | 2017-10-20 | 中国人民解放军火箭军工程大学 | The mass concentration measurement apparatus and method of smoke interfered with infrared in a kind of vacuum |
| CN109060731A (en) * | 2018-06-25 | 2018-12-21 | 中国科学院西安光学精密机械研究所 | Infrared optical system spectral transmittance test device and method |
| CN113033013A (en) * | 2021-04-08 | 2021-06-25 | 北京环境特性研究所 | Infrared smoke screen spectrum transmittance simulation method |
| CN113033013B (en) * | 2021-04-08 | 2023-04-14 | 北京环境特性研究所 | Infrared smoke screen spectrum transmittance simulation method |
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