CN113670885A - Fluorescent aerosol concentration detection device and method based on Shar imaging - Google Patents
Fluorescent aerosol concentration detection device and method based on Shar imaging Download PDFInfo
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Abstract
The invention discloses a fluorescent aerosol concentration detection device and method based on Sabouraud's imaging.A laser emitting device emits laser beams towards an aerosol sample to be detected at a preset angle in a tube, the laser emitting device is fixed on a rotating device, a receiving device collects fluorescent intensity signals generated by the laser beams through the aerosol sample, the receiving device fixed on the rotating device comprises a telescope, a light path adjusting device is fixed on the rotating device, the light path adjusting device comprises an optical sensor, a light sensing surface of the optical sensor, an optical axis surface of the telescope and an extension surface of the aerosol sample surface intersect in the same straight line, a control device comprises an industrial personal computer and a signal generator, and the industrial personal computer controls the signal generator to synchronize the laser emitting device and the light path adjusting device.
Description
Technical Field
The invention relates to the technical field of aerosol concentration detection, in particular to a fluorescence aerosol concentration detection device and method based on Sabouraud imaging.
Background
With the gradual deterioration of the environmental pollution in the world, how to observe the propagation law of aerosol draws the attention of researchers in various countries. At present, the research mainly adopts a laser induced fluorescence technology, and the optical remote sensing technology is utilized to reduce the distribution of the two-dimensional aerosol, so that the research on the aerosol diffusion rule is of great significance. The existing imaging laser radar mainly adopts a pulse laser radar technology, and aerosol distribution on a path can be accurately positioned through a large-caliber telescope and a high-sensitivity detector. Although the technology of pulse laser radar is mature, the high cost and the large blind area are still the problems which are difficult to solve at present.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a fluorescence aerosol concentration detection device and method based on Sabouraud imaging, which can accurately detect the aerosol distribution at a short distance while the whole volume is smaller.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention relates to a fluorescence aerosol concentration detection device based on Sabouraud imaging,
a rotating device is arranged on the base plate,
the laser emitting device emits laser beams towards the aerosol sample to be measured at a preset angle, the laser emitting device is fixed on the rotating device,
the receiving device collects a fluorescence intensity signal generated by the laser beam through the aerosol sample, the receiving device fixed on the rotating device comprises a telescope,
the light path adjusting device is fixed on the rotating device and comprises an optical sensor, the light sensing surface of the optical sensor, the optical axis surface of the telescope and the extension surface of the aerosol sample surface are intersected on the same straight line,
and the control device comprises an industrial personal computer and a signal generator, wherein the industrial personal computer controls the signal generator to synchronize the laser emitting device and the light path adjusting device.
In the fluorescent aerosol concentration detection device based on the Sabouraud's imaging, the rotating device comprises a rotating platform and a driving assembly thereof, and the laser emitting device, the receiving device and the light path adjusting device are fixed on the rotating platform so as to obtain fluorescent intensity signals in different directions by changing different detection angles.
In the fluorescent aerosol concentration detection device based on the Sabouraud imaging, the laser beam is near-infrared band laser.
In the fluorescence aerosol concentration detection device based on the Sabouraud imaging, the light path adjusting device further comprises an optical filter arranged in front of the light-sensitive surface.
In the fluorescence aerosol concentration detection device based on the Sabouraud's imaging, the control device comprises a signal processor for converting the fluorescence intensity signal into a digital signal and removing noise.
In the fluorescent aerosol concentration detection device based on the Sabouraud imaging, the control device adjusts the emission angle of the laser beam to obtain fluorescent intensity signals in different directions, and the signal processor generates a two-dimensional space signal field based on the fluorescent intensity signals in different directions.
In the fluorescence aerosol concentration detection device based on the Sabourdon imaging, a laser collimation device for collimation is arranged between the laser emission device and the aerosol sample.
In the fluorescent aerosol concentration detection device based on the Sabourdon imaging, the laser emission device is connected with the temperature driving unit and the current driving unit, and the industrial personal computer is connected with the temperature driving unit and the current driving unit so as to adjust the current and the temperature of the laser emission device.
In the fluorescent aerosol concentration detection device based on the Sabouraud imaging, the preset angle is an included angle between an emitted laser beam and an initial angle of a laser emitting device.
The detection method of the fluorescence aerosol concentration detection device based on the Sabouraud imaging comprises the following steps,
the industrial personal computer controls the signal generator to synchronously start the laser emitting device and the light path adjusting device and control laser emission,
guiding laser beams to pass through a laser collimation device and then to be emitted to an aerosol sample to be detected at a preset angle, collecting backscattered fluorescence intensity signals excited by the laser beams and the aerosol sample to be detected through a receiving device, wherein a photosensitive surface, an optical axis surface of a telescope and an extension surface of the aerosol sample are intersected on the same straight line,
the rotating platform where the laser emitting device, the light path adjusting device and the receiving device are located is rotated through the rotating device, so that scanning and data acquisition of different angles are carried out on a two-dimensional space, fluorescence intensity signals in different directions are obtained by adjusting the angle of laser in the space, and a two-dimensional space signal field is obtained.
In the technical scheme, the fluorescence aerosol concentration detection device based on the Sabouraud imaging provided by the invention has the following beneficial effects: the invention obtains a comprehensive and clear image when extension surfaces of a shot object plane, an image plane and a lens plane are intersected on the same straight line, can obtain infinite depth of field on a detection path, can clearly image an object plane by the detection plane, and can obtain extremely high distance resolution.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic structural diagram of a fluorescence aerosol concentration detection device based on Sabourne imaging according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a fluorescence aerosol concentration detection device based on Sabourne imaging according to an embodiment of the invention;
fig. 3 is a schematic flow chart of a detection method of a fluorescence aerosol concentration detection device based on saxophone imaging according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to fig. 1 to 3 of the drawings of the embodiments of the present invention, and it is apparent that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
In one embodiment, as shown in fig. 1 to 2, a fluorescence aerosol concentration detection device based on saxophone imaging comprises,
the rotation means 9 are arranged to rotate the drum,
a laser emitting device 3 for emitting laser beams at a predetermined angle toward an aerosol sample to be measured, the laser emitting device 3 being fixed on the rotating device 9,
a receiving device 8 for collecting the fluorescence intensity signal generated by the laser beam passing through the aerosol sample, wherein the receiving device 8 fixed on the rotating device 9 comprises a telescope,
the light path adjusting device 7 is fixed on the rotating device 9, the light path adjusting device 7 comprises an optical sensor, the light sensing surface of the optical sensor, the optical axis surface of the telescope and the extension surface of the aerosol sample surface intersect on the same straight line,
and the control device comprises an industrial personal computer 5 and a signal generator 6, wherein the industrial personal computer 5 controls the signal generator 6 to synchronize the laser emission device with the light path adjusting device 7.
In the preferred embodiment of the fluorescence aerosol concentration detection device based on saxophone imaging, the rotating device 9 includes a rotating platform and a driving component thereof, and the laser emitting device 3, the receiving device 8 and the optical path adjusting device 7 are fixed on the rotating platform to obtain fluorescence intensity signals in different directions by changing different detection angles.
In a preferred embodiment of the fluorescent aerosol concentration detection device based on the saxophone imaging, the laser beam is near-infrared band laser.
In a preferred embodiment of the fluorescence aerosol concentration detection apparatus based on the sha shi imaging, the light path adjusting apparatus 7 further includes an optical filter disposed in front of the light-sensing surface.
In a preferred embodiment of the fluorescence aerosol concentration detection device based on the saxophone imaging, the control device includes a signal processor for converting the fluorescence intensity signal into a digital signal and removing noise.
In a preferred embodiment of the fluorescent aerosol concentration detection device based on the saxophone imaging, the control device adjusts an emission angle of the laser beam to obtain fluorescence intensity signals in different directions, and the signal processor generates a two-dimensional space signal field based on the fluorescence intensity signals in different directions.
In a preferred embodiment of the fluorescence aerosol concentration detection device based on the saxophone imaging, a laser collimation device 4 for collimation is arranged between the laser emission device 3 and the aerosol sample.
In the preferred embodiment of the fluorescence aerosol concentration detection device based on the Sabourdon imaging, the laser emission device 3 is connected with the temperature driving unit 1 and the current driving unit 2, and the industrial personal computer 5 is connected with the temperature driving unit 1 and the current driving unit 2 to adjust the current and the temperature of the laser emission device 3.
In a preferred embodiment of the fluorescence aerosol concentration detection device based on the saxophone imaging, the predetermined angle is an included angle between an emitted laser beam and an initial angle of the laser emitting device 3.
In one embodiment, the fluorescent aerosol concentration detection device based on the Sabouraud imaging comprises:
the laser emitting device 3 is used for emitting laser, synchronously starting the laser emitting device and the light path adjusting device 7 through the control signal generation of the industrial personal computer 5, controlling temperature driving and current driving at the same time, adjusting the proper current and temperature emitted by the laser, and adjusting the light beam of the laser to be emitted to the aerosol sample to be detected in the space to be detected at a certain angle after passing through the laser collimating device 4; the certain angle refers to an included angle between the laser emitted after the system is fixed and passing through the rotating device 9 and an initial angle set by the laser emitting device 3; the space to be measured refers to a two-dimensional space not greater than 100m x 100 m.
And the light path adjusting device 7 is used for adjusting different included angles of the optical detector, so that an optical system where the laser emitting device 3 and the receiving device 8 are located meets the law of the Shake's imaging.
And the receiving device 8 is used for collecting the laser emitted by the laser emitting device 3 and an intensity signal excited by the aerosol sample to be detected, and entering the computer device for data collection through the optical detector.
And the rotating device 9 is used for rotating the whole platform where the laser emitting device 3, the light path adjusting device 7 and the receiving device 8 are arranged, so that scanning of different angles is performed on the two-dimensional space, and a two-dimensional space fluorescence signal field is obtained.
And the computer device comprises an industrial personal computer 5 and a signal generator 6 and is used for opening and closing different devices in the whole system, synchronously operating the different devices and processing the fluorescence intensity information obtained by the receiving device 8.
In one embodiment, the rotating platform acquires fluorescence intensity signals in different directions by changing different detection angles. The acquired signal is an aerosol back-scattering fluorescence intensity signal after passing through the optical filter, so that the fluorescence characteristic of the aerosol is better captured.
In one embodiment, the optical sensor is used to receive the backscattered fluorescence collected by the device 8, convert it into a digital electrical signal, and enable the buffering and transmission of data by a computer system. The signal generator 6 can control the synchronization of the laser emitting device 3 and the optical path adjusting device 7, thereby reducing the stray signals introduced by the normally open image detector. The computer system can process the intensity information through an algorithm, the intensity information obtained by each detection is subtracted from the intensity information obtained by each detection through the acquisition of the initial intensity information, the interference of noise information brought by background light on the whole system is reduced through a signal processing algorithm, and the computer system can also perform two-dimensional reconstruction on a plurality of pieces of obtained one-dimensional intensity data, so that the two-dimensional fluorescence intensity field information in the whole aerosol flow field is obtained.
In one embodiment, the two-dimensional aerosol concentration detection device comprises a temperature driving unit 1, a current driving unit 2, a laser emitting device 3, a laser collimating device 4, an industrial personal computer 5, a light path adjusting device 7 and a receiving device 8. The industrial personal computer 5 controls the signal generator 6 to synchronously start the laser emitting device 3 and an optical sensor in the light path adjusting device 7, simultaneously controls the temperature driving unit 1 and the current driving unit 2, adjusts the proper current and temperature of laser emission, controls laser emission, and guides a laser beam to pass through the laser collimating device 4 and then to be emitted to an aerosol sample to be detected at a preset angle in a space to be detected, wherein the preset angle refers to an included angle formed by the laser emitted after the system is fixed and an initial angle set by the laser emitting device after the laser beam passes through the rotating device, and the space to be detected refers to a two-dimensional space not larger than 100 m. And the receiving device 8 is used for collecting the laser emitted by the laser emitting device 3 and a backscattering fluorescence intensity signal excited by the aerosol sample to be detected. Through rotary device 9, make the whole platform at laser emitter 3, light path adjusting device 7, the three device place of receiving arrangement 8 rotate to carry out the scanning of different angles to the two-dimensional space, pass through optical detector again and get into industrial computer 5 and carry out data acquisition, through the angle of adjustment laser in the space, obtain the intensity information on the equidirectional, thereby obtain and obtain two-dimensional space signal field.
In one embodiment, the laser emitting device 3 comprises a diode laser.
In one embodiment, the receiving device 2 comprises a telescope module; the optical path adjusting device 3 includes a band-pass filter and an optical sensor; the optical sensor is fixed through the fixed connecting piece, ensures that the photosensitive surface of the optical sensor, the optical axis of the telescope and the object plane meet the Shake's law, and is responsible for converting the optical signal received by the telescope into an electric signal and transmitting the electric signal to the industrial personal computer 5.
In one embodiment, the rotating device 9 comprises a rotating platform, which is responsible for rotating the whole fixed bottom plate, so that the laser can be directed to different angles in the whole two-dimensional space; the industrial personal computer 5 comprises a reconstruction unit and a control unit and is responsible for performing two-dimensional reconstruction on the signal intensity value obtained after scanning so as to obtain a two-dimensional concentration field; the control unit is responsible for the time sequence of the whole system and controls the synchronization of the temperature driving unit 1, the current driving unit 2, the laser emitting device 3, the signal generator 6 and the rotating device 9; the reconstruction unit is simultaneously responsible for processing system signals, original two-dimensional field signals are collected before the system is started, and signal values after denoising processing are obtained through subtraction of real-time signals and the real-time signals.
In one embodiment, the laser emitting device 3 is triggered by the industrial personal computer 5 to emit continuous laser with a certain wavelength, wherein the certain wavelength refers to 808nm wavelength laser.
In one embodiment, the laser beam passes through the collimating and beam expanding device 4 to emit continuous laser beams parallel to the optical axis of the receiving device 8, the laser beams react with aerosol in the path, different fluorescence echo signals are received by the receiving device 8, optical signals received by the receiving device 8 are collected on the optical sensor, the received optical signals are converted into electric signals by the optical sensor, and the electric signals are stored in different pixels of the optical sensor and are subjected to signal processing by computer software, so that the signal intensities at different distances can be obtained.
In one embodiment, the rotating platform 9 is controlled by the industrial personal computer 5, so that two-dimensional distance-signal intensity value relations at different angles and different distances are obtained. The obtained signal intensity values at different distances can be subjected to two-dimensional reconstruction through the industrial personal computer 6, so that aerosol intensity field distribution in a flow field can be obtained.
The detection method of the fluorescence aerosol concentration detection device based on the Sabouraud imaging comprises the following steps,
the industrial personal computer 5 controls the signal generator 6 to synchronously start the laser emitting device and the light path adjusting device 7 and control laser emission,
guiding laser beams to pass through a laser collimating device 4 and then to be emitted to an aerosol sample to be detected at a preset angle, collecting backscattered fluorescence intensity signals excited by the laser beams and the aerosol sample to be detected through a receiving device 8, wherein a photosensitive surface, an optical axis surface of a telescope and an extension surface of the aerosol sample intersect on the same straight line,
the rotating platform on which the laser emitting device 3, the light path adjusting device 7 and the receiving device 8 are arranged is rotated through the rotating device 9, so that scanning and data acquisition of different angles are carried out on a two-dimensional space, fluorescence intensity signals in different directions are obtained by adjusting the angle of laser in the space, and a two-dimensional space signal field is obtained.
In the preferred embodiment of the method for detecting the concentration of the fluorescent aerosol based on the law of sha shi imaging, as shown in fig. 3, an industrial personal computer 5 controls a signal generator 6 to synchronously start a laser emitting device and a light path adjusting device 7, controls a temperature driving unit and a current driving unit at the same time, adjusts the proper current and temperature emitted by laser, controls laser emission, guides a laser beam to pass through a laser collimating device 4 and then emits the laser beam to an aerosol sample to be detected at a certain angle to a space to be detected, the certain angle refers to an included angle between the laser emitted after the system is fixed and an initial angle set by the laser emitting device 3 through a rotating device 9, and the space to be detected refers to a two-dimensional space not more than 100m x 100 m; and the receiving device 8 is used for collecting the laser emitted by the laser emitting device 3 and a backscattering fluorescence intensity signal excited by the aerosol sample to be detected. Through the rotating device 9, the whole platform where the three devices of the laser emitting device 3, the light path adjusting device 7 and the receiving device 8 are located is rotated, so that scanning of different angles is performed on a two-dimensional space, the two-dimensional space enters the computer device through the optical detector to perform data acquisition, and intensity information in different directions is obtained by adjusting the angle of laser in the space, so that a two-dimensional space signal field is obtained.
The invention realizes the flow field aerosol monitoring in the near infrared band, utilizes laser to induce fluorescence, emits laser with certain wavelength through the laser emitting device 3, realizes the adjustment of the light path through the light path adjusting device 7, receives signal light through the receiving device 8, and finally realizes the two-dimensional scanning of the system through the rotating device 9, thereby realizing the real-time monitoring of the fluorescence signal of the aerosol flow field in the two-dimensional space.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. A fluorescence aerosol concentration detection device based on Sabourne imaging is characterized by comprising,
a rotating device is arranged on the base plate,
the laser emitting device emits laser beams towards the aerosol sample to be measured at a preset angle, the laser emitting device is fixed on the rotating device,
a receiving device for collecting the fluorescence intensity signal generated by the laser beam passing through the aerosol sample, wherein the receiving device is fixed on the receiving device of the rotating device and comprises a telescope,
the light path adjusting device is fixed on the rotating device and comprises an optical sensor, the light sensing surface of the optical sensor, the optical axis surface of the telescope and the extension surface of the aerosol sample surface are intersected on the same straight line,
and the control device comprises an industrial personal computer and a signal generator, wherein the industrial personal computer controls the signal generator to synchronize the laser emitting device and the light path adjusting device.
2. The device for detecting the concentration of fluorescent aerosol based on saxophone imaging according to claim 1, wherein the rotating device preferably includes a rotating platform and a driving assembly thereof, and the laser emitting device, the receiving device and the optical path adjusting device are fixed on the rotating platform to obtain the fluorescent intensity signals in different directions by changing different detection angles.
3. The device for detecting the concentration of the fluorescent aerosol based on the Sabouraud imaging as claimed in claim 1, wherein the laser beam is near-infrared band laser.
4. The device for detecting the concentration of fluorescent aerosol based on the Sabouraud imaging as claimed in claim 1, wherein the light path adjusting device further comprises a filter disposed in front of the light-sensing surface.
5. The device for detecting the concentration of fluorescent aerosol based on the Sabouraud imaging as claimed in claim 1, wherein the control device comprises a signal processor for converting the fluorescence intensity signal into a digital signal and removing noise.
6. The device for detecting the concentration of fluorescent aerosol based on the Sabouraud imaging as claimed in claim 5, wherein the control device adjusts the emission angle of the laser beam to obtain the fluorescence intensity signals in different directions, and the signal processor generates the two-dimensional spatial signal field based on the fluorescence intensity signals in different directions.
7. The device for detecting the concentration of the fluorescent aerosol based on the Sabourdon imaging as claimed in claim 1, wherein a laser alignment device for alignment is arranged between the laser emitting device and the aerosol sample.
8. The device for detecting the concentration of the fluorescent aerosol based on the Sabourdon imaging according to claim 1, wherein the laser emitting device is connected with a temperature driving unit and a current driving unit, and the industrial personal computer is connected with the temperature driving unit and the current driving unit to adjust the current and the temperature of the laser emitting device.
9. The device for detecting the concentration of fluorescent aerosol based on the Sabourdon imaging according to claim 1, wherein the predetermined angle is an included angle between the emitted laser beam and an initial angle of the laser emitting device.
10. A detection method of the fluorescence aerosol concentration detection device based on Sabouraud imaging according to any one of claims 1 to 9, which comprises the following steps,
the industrial personal computer controls the signal generator to synchronously start the laser emitting device and the light path adjusting device and control laser emission,
guiding laser beams to pass through a laser collimation device and then to be emitted to an aerosol sample to be detected at a preset angle, collecting backscattered fluorescence intensity signals excited by the laser beams and the aerosol sample to be detected through a receiving device, wherein a photosensitive surface, an optical axis surface of a telescope and an extension surface of the aerosol sample are intersected on the same straight line,
the rotating platform where the laser emitting device, the light path adjusting device and the receiving device are located is rotated through the rotating device, so that scanning and data acquisition of different angles are carried out on a two-dimensional space, fluorescence intensity signals in different directions are obtained by adjusting the angle of laser in the space, and a two-dimensional space signal field is obtained.
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