CN208654031U - A kind of fluorescent material detection device - Google Patents
A kind of fluorescent material detection device Download PDFInfo
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- CN208654031U CN208654031U CN201820857465.2U CN201820857465U CN208654031U CN 208654031 U CN208654031 U CN 208654031U CN 201820857465 U CN201820857465 U CN 201820857465U CN 208654031 U CN208654031 U CN 208654031U
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Abstract
The utility model provides a kind of fluorescent material detection device, the device includes: optical transmitter module, fluorescence reception module, isochronous controller and data processor, the isochronous controller is connect with the laser emitting module and the fluorescence reception module respectively, and the fluorescence reception module is also connect with the data processor；Wherein, the laser emitting module is used to emit laser pulse to determinand；The fluorescence reception module is for receiving the fluorescence signal launched after the determinand is excited；The isochronous controller is used to control the laser emitting module and the fluorescence reception module is in synchronous working state；The data processor is for handling the fluorescence signal, with the fluorescent material ingredient in the determination determinand.Fluorescent material detection device provided by the utility model can reduce ambient noise, and have higher signal-to-noise ratio.
Description
Technical field
The utility model relates to detection technique field more particularly to a kind of fluorescent material detection devices and method.
Background technique
Fluorescence is a kind of chemiluminescence phenomenon of luminescence generated by light, and fluorescent material then refers to the illumination in certain wavelength and intensity
Under excitation, the electronics in substance can enter excitation state, then transition returns to ground state, and generates the substance of the fluorescence of certain wavelength.
Wherein, in water greasy dirt just contain there are many can fluorescent material, such as monocycle, polycyclic aromatic hydrocarbons, this kind of compound
Under the laser irradiation of appropriate wavelength and intensity, the fluorescence of peculiar wavelength can be issued.
Currently, there are many detecting instruments or device for being used to detect greasy dirt in water proposed based on the above principles, including
Oily detection device in contact and contactless water.However, since detection device is vulnerable to ambient noise (such as natural light, dark current
Deng) influence, signal-to-noise ratio usually lower (generally below 1), and is limited by self structure and is difficult to improve, therefore most of inspection
It surveys device to be also limited to carry out analysis test in laboratory, and cannot be used for field analysis detection.
As it can be seen that existing fluorescent material detection device has that signal-to-noise ratio is lower.
Utility model content
The utility model embodiment provides a kind of fluorescent material detection device and method, to solve existing fluorescent material detection
Device has that signal-to-noise ratio is lower.
In order to solve the above technical problems, the utility model is realized in this way:
In a first aspect, the utility model embodiment provides a kind of fluorescent material detection device, comprising: Laser emission mould
Block, fluorescence reception module, isochronous controller and data processor, the isochronous controller respectively with the laser emitting module and
The fluorescence reception module connection, the fluorescence reception module are also connect with the data processor；
Wherein, the laser emitting module is used to emit laser pulse to determinand；
The fluorescence reception module is for receiving the fluorescence signal launched after the determinand is excited；
The isochronous controller is in synchronous working for controlling the laser emitting module and the fluorescence reception module
State；
The data processor is for handling the fluorescence signal, with the fluorescent material in the determination determinand
Ingredient.
Second aspect, the utility model embodiment provide a kind of fluorescent material detection method, are applied to fluorescent material and detect
Device, the fluorescent material detection device include: laser emitting module, fluorescence reception module, isochronous controller and data processing
Device, the isochronous controller are connect with the laser emitting module and the fluorescence reception module respectively, the fluorescence reception mould
Block is also connect with the data processor；
In the utility model embodiment, due to fluorescent material detection device include laser emitting module, fluorescence reception module,
Isochronous controller and data processor, the isochronous controller respectively with the laser emitting module and the fluorescence reception module
Connection, the fluorescence reception module are also connect with the data processor.In this way, described in being controlled by the isochronous controller
Laser emitting module and the fluorescence reception module are in synchronous working state, to not only can guarantee the fluorescence reception module
The fluorescence signal that the determinand is launched can be received, and can be reduced ambient noise.In addition, can also be described sharp by increasing
The energy for the laser pulse that optical transmitter module is launched, umber of pulse, or reduce the side of the field angle of the fluorescence reception module
Formula improves signal-to-noise ratio, so that the fluorescent material detection device is had higher signal-to-noise ratio.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, the utility model embodiment will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of fluorescent material detection device provided by the embodiment of the utility model；
Fig. 2 is the working principle diagram of fluorescent material detection device provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the embodiments are a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, fall within the protection scope of the utility model.
It is a kind of structural schematic diagram of fluorescent material detection device provided by the embodiment of the utility model referring to Fig. 1, Fig. 1,
As shown in Figure 1, described device includes: laser emitting module 11, fluorescence reception module 12, isochronous controller 13 and data processor
14, the isochronous controller 13 is connect with the laser emitting module 11 and the fluorescence reception module 12 respectively, the fluorescence
Receiving module 12 is also connect with the data processor 14；
Wherein, the laser emitting module 11 is used to emit laser pulse to determinand；
The fluorescence reception module 12 is for receiving the fluorescence signal launched after the determinand is excited；
The isochronous controller 13 is in same for controlling the laser emitting module 11 and the fluorescence reception module 12
Walk working condition；
The data processor 14 is for handling the fluorescence signal, with the fluorescence in the determination determinand
Matter ingredient.
In the present embodiment, as shown in Figure 1, the fluorescent material detection device includes laser emitting module 11, fluorescence reception
Module 12, isochronous controller 13 and data processor 14, the isochronous controller 13 respectively with the laser emitting module 11 and
The fluorescence reception module 12 connects, and the fluorescence reception module 12 is also connect with the data processor 14.
In the present embodiment, the laser emitting module 11 may include the laser that can launch laser pulse, may be used yet
To include the beam expander that can be expanded to the laser that laser is launched, and the standard that can be collimated to the laser after expanding
Straight device is reduced so that the laser pulse that the laser emitting module 11 is launched can be preferably irradiated on the determinand
Detection effect is influenced because of laser diverging.
The fluorescence reception module 12 may include the device that can receive the fluorescence number launched after the determinand is excited
Part, such as: including convergent lens and electrooptical device, the fluorescence signal of diverging is brought together by convergent lens, so
Fluorescence signal is converted into electric signal by electrooptical device.
The isochronous controller 13 can be synchronously control chip or synchronous circuit, and the isochronous controller 13 can be with
It is described sharp to control by emitting synchronous triggering signal to the laser emitting module 11 and the fluorescence reception module 12 simultaneously
Optical transmitter module 11 and the fluorescence reception module 12 are in synchronous working state.The data processor 14 can be can be to institute
State the processor chips or microcomputer that fluorescence signal is handled.
Specifically, as shown in Figure 1, the isochronous controller 13 can be swashed by bus 15 and bus 16 with described respectively
Optical transmitter module 11 and the fluorescence reception module 12 connection, the fluorescence reception module 12 can also by another bus with
The data processor 14 connects, it should be noted that, the bus is not shown to avoid lines from covering, in Fig. 1.
In this way, detecting certain determinand using the fluorescent material detection device, whether to contain certain fluorescent material (such as hydrocarbon
Compound, chromophoric dissolved organic matter, chlorophyll or other substances for launching fluorescence) when, it can be sent out by the laser
It penetrates module 11 and emits laser pulse, specifically, the wave of the laser of the irradiation as needed for different fluorescent materials to the determinand
It is long different, therefore corresponding wavelength can be emitted according to the characteristic of the target fluorescent substance of required measurement, Xiang Suoshu determinand
Laser pulse.
If containing target fluorescent substance in the determinand, the target fluorescent substance in the determinand will be by described
The excitation of laser pulse and launch the wavelength fluorescence signal shorter relative to the wavelength of the laser pulse.Therefore, Ke Yitong
Cross the fluorescence reception module 12 and receive the fluorescence signal launched after the determinand is excited, specifically, due to laser and
The emission rate of fluorescence is than very fast, nearly close to the light velocity, therefore to avoid the fluorescence reception module 12 that from can not receiving
Fluorescence signal, and to reduce the influence of ambient noise, the Laser emission mould can be controlled by the isochronous controller 13
Block 11 and the fluorescence reception module 12 are in synchronous working state.
The laser emitting module 11 can send the received fluorescence signal of institute after receiving the fluorescence signal
Enter the data processor 14 to be handled, specifically, can be the received fluorescence signal of institute is generated after data processing it is glimmering
Light spectrum, and the photoluminescence peak of the fluorescence signal emitted after being stimulated by different fluorescent materials is different, according to institute
Fluorescence spectrum is stated, photoluminescence peak is obtained, can finally determine in the determinand whether contain target fluorescent object according to photoluminescence peak
Matter, so that it is determined that fluorescent material ingredient contained in the determinand.
Optionally, described to expand as shown in Figure 1, the laser emitting module 11 includes pulse laser 111 and beam expanding lens
Mirror is installed on the transmitting terminal of the pulse laser 111, wherein described in the laser pulse warp that the pulse laser 111 emits
Emit after beam expanding lens beam-expanding collimation to the determinand.
Specifically, as shown in Figure 1, the laser emitting module 11 may include pulse laser 111 and beam expanding lens, the expansion
Shu Jing is installed on the transmitting terminal of the pulse laser 111, and as depicted in figs. 1 and 2, the beam expanding lens can be by a concavees lens L1
It is formed with a convex lens L2, wherein for expanding to the laser that pulse laser is launched, convex lens L2 is used concavees lens L1
It is collimated in the laser after expanding, and isochronous controller can be by simultaneously to pulse laser touching synchronous with ICCD transmitting
It signals to be in synchronous working state to control pulse laser and ICCD.
The pulse laser 111, which can emit, refers to single laser pulse, and pulse width is generally less than 0.25 second, and at interval of
It is primary that certain time just emits work, it has larger output power, can launch the laser pulse of large energy, therefore it is sent out
The laser pulse penetrated is more suited to as excitation light source.Specifically, the pulse laser 111 can choose yttrium-aluminium-garnet crystalline substance
Body Nd:YAG laser, and the laser using air cooling, since such laser lengths are shorter, structure may be selected
It is compact, it is small in size, so as to keep the volume of the fluorescent material detection device also relatively small.
In this way, the laser pulse that the pulse laser 111 emits will emit after the beam expanding lens beam-expanding collimation to institute
State determinand, so as to the laser signal that enables the pulse laser 111 to launch it is accurate and be not irradiated to divergently to
It surveys on object, and then guarantees preferable detection effect.
Optionally, as shown in Figure 1, the fluorescence reception module 12 includes convergent lens L3, optical filter F and enhancing charge
Coupled apparatus (IntensifiedCharge-coupled Device, abbreviation ICCD) 121, the convergent lens L3 is installed on institute
The front end of optical filter F is stated, the optical filter F is installed on the receiving end of the ICCD121, wherein the fluorescence signal is successively worn
Cross the convergent lens L3, the optical filter F and the ICCD121.
Specifically, as shown in Figure 1, the fluorescence reception module 12 may include convergent lens L3, optical filter F and
ICCD121, the convergent lens L3 are installed on the front end of the optical filter F, and the optical filter F is installed on the ICCD121's
Receiving end.The fluorescent material launched after being excited due to the determinand is to be scattered in surrounding all directions, and as schemed
It shown in 2, can be converged by fluorescence signal of the convergent lens L3 to scattering, and can be by the fluorescence signal after convergence through optical filter
F is filtered, and to allow the fluorescence signal of target wave band to pass through, can finally be believed by the ICCD filtered fluorescence
Number carry out photoelectric conversion, to convert optical signals to electric signal, using the quantity of electric charge indicate optical signal size, to facilitate the data
Processor 14 handles it.
Wherein, the target wave band can be the wave-length coverage phase launched with the target fluorescent substance in the determinand
It is corresponding, in this way, can guarantee the accuracy of testing result to a certain extent, effectively avoid doing caused by other unrelated optical signals
It disturbs, and the optical filter can also carry out parameter selection according to specific determinand, and be conveniently replaceable when in use.The ICCD by
Image intensifier and charge coupled cell (Charge-coupled Device, CCD) are coupled to form, including image intensifier, CCD and
Relay several parts such as coupling assembly, have good temporal resolution (can reach nanosecond order), and be also equipped with quantum efficiency it is high,
The advantages that dynamic range is big, fast response time and stability are good, therefore, using the ICCD as electrooptical device, can protect
It demonstrate,proves the fluorescent material detection device and has higher quality, and have higher accuracy.
Optionally, the wavelength that the laser emitting module 11 emits is 355nm, the optical filter F allow by wave band
For 450nm to 510nm.
In the embodiment, for convenient for detecting to greasy dirt in water, the wavelength that the laser emitting module 11 emits can
Think 355nm, specifically, can be the wavelength that the pulse laser 111 emits is 355nm, and the optical filter F allows to pass through
Wave band be 450nm to 510nm.Since greasy dirt contains a large amount of transmitting fluorescence matrix in water, as monocycle, Ppolynuclear aromatic are hydrocarbon
Compound, therefore when these compounds are by laser irradiation with appropriate wavelength (such as 254nm or 355nm), peculiar wave can be issued
A length of 400nm is to the fluorescence between 600nm, photoluminescence peak 480nm.
According to this principle, and since the exciting light that wavelength is 355nm is smaller by atmospheric attenuation, and other are distinguished convenient for the later period
Therefore fluorescent material can control the laser pulse that the laser emitting module 11 is 355nm to water surface launch wavelength to be measured, and
It selects bandwidth for 60nm, allows the optical filter for being 450nm to 510nm by wave band, to guarantee the fluorescent material detection device
Greasy dirt in water can accurately be detected.
Optionally, the field angle of the convergent lens L3 is 1mrad, and the pulse frequency of the laser emitting module 11 is
100Hz, the energy for the single laser pulse that the laser emitting module 11 emits are 5 μ J.
Have higher signal-to-noise ratio to verify the fluorescent material detection device, can detect in water for oil slick, according to
Following formula (1) calculates its signal-to-noise ratio:
Wherein, SNR (R) is signal-to-noise ratio, NdFor the dark current noise of the fluorescent material detection device, n is umber of pulse, M
It (R) is number of photons received by the fluorescent material detection device, NbFor number of photons caused by solar radiation, M (R) and
NbFollowing formula (2) can be respectively adopted and formula (3) is calculated:
Wherein, η (λ) is the quantum efficiency in af at wavelength lambda, and h is planck constant, λ and λLRespectively photoluminescence peak and swash
The wavelength of light pulse, σF(λL, λ) and it is fluorescent scattering section, τdFor the gate-width of ICCD, A is the bore of fluorescence reception module, and R is to visit
Ranging is from R0For determinand to the distance of fluorescence reception module, ELFor the energy of single laser pulse, K0(λ) is filter function, ζ
It (R) is geometry blanketing fctor (generally assuming that be 1), N (R) is the oil slick surface ground state population density at distance R, T (R0)e-
σ(R-R0) it is the propagation in atmosphere factor, when R is equal to R0When, the propagation in atmosphere factor is T (R0), σ indicates oil film extinction coefficient, and c is light
Speed, LSFor the light radiation brightness of the water surface, the field angle that 0, θ is fluorescence reception module can be taken as at night, Δ λ is the band of optical filter
Width, Δ t are the response time of ICCD.
In this way, the signal-to-noise ratio of the fluorescent material detection device can be calculated according to the value of above each parameter, and by formula
(1), formula (2) and formula (3) be it is found that in design, the laser pulse that can be launched by increasing the laser emitting module
Energy, umber of pulse, or reduce the mode of the field angle of the fluorescence reception module and improve the fluorescent material detection dress
The signal-to-noise ratio set, so that the fluorescent material detection device can be used in field analysis detection, wherein umber of pulse can pass through tune
The pulse frequency of the whole laser emitting module is realized.
Therefore, in the embodiment, the field angle 1mrad of the convergent lens L3, the laser emitting module can be made
11 pulse frequency is that 100Hz specifically may be used when the energy for the single laser pulse that the laser emitting module 11 emits is 5 μ J
Be the pulse laser 111 pulse frequency for 100Hz, transmitting single laser pulse energy be 5 μ J, with guarantee
The fluorescent material detection device has higher signal-to-noise ratio, in actual detection, detection time can in 0.5s between 1s,
The energy of single laser pulse can be in 5 μ J between 50 μ J.It specifically, is verifying, when giving the value of other parameters such as
When shown in the following table 1, the signal-to-noise ratio that can calculate the fluorescent material detection device is 10, it can be seen that, the utility model is implemented
Fluorescent material detection device provided by example has higher signal-to-noise ratio really.
The referential data of the parameters of 1 fluorescent material detection device of table
Optionally, the detection range of the fluorescent material detection device is 5m between 15m, wherein the detection range
For the distance of the fluorescent material detection device to the determinand.
Specifically, the detection range of the fluorescent material detection device can be in 5m between 15m, to not only be able to satisfy
Long-range detection demand, moreover it is possible to guarantee that the fluorescent material detection device has higher signal-to-noise ratio, quickly be examined suitable for field
Survey analysis.
In the utility model embodiment, due to fluorescent material detection device include laser emitting module, fluorescence reception module,
Isochronous controller and data processor, the isochronous controller respectively with the laser emitting module and the fluorescence reception module
Connection, the fluorescence reception module are also connect with the data processor.In this way, described in being controlled by the isochronous controller
Laser emitting module and the fluorescence reception module are in synchronous working state, to not only can guarantee the fluorescence reception module
The fluorescence signal that the determinand is launched can be received, and can be reduced ambient noise.In addition, can also be described sharp by increasing
The energy for the laser pulse that optical transmitter module is launched, umber of pulse, or reduce the side of the field angle of the fluorescence reception module
Formula improves signal-to-noise ratio, so that the fluorescent material detection device is had higher signal-to-noise ratio.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, the technical solution of the utility model is substantially in other words to existing skill
The part that art contributes can be embodied in the form of software products, which is stored in a storage and is situated between
In matter (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the utility model.
The embodiments of the present invention are described above in conjunction with attached drawing, but the utility model is not limited to
The specific embodiment stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, are belonged within the protection of the utility model.
Claims (6)
1. a kind of fluorescent material detection device characterized by comprising laser emitting module, fluorescence reception module, synchronously control
Device and data processor, the isochronous controller are connect with the laser emitting module and the fluorescence reception module respectively, institute
Fluorescence reception module is stated also to connect with the data processor；
Wherein, the laser emitting module is used to emit laser pulse to determinand；
The fluorescence reception module is for receiving the fluorescence signal launched after the determinand is excited；
The isochronous controller is used to control the laser emitting module and the fluorescence reception module is in synchronous working state；
The data processor for handling the fluorescence signal, with the fluorescent material in the determination determinand at
Point.
2. the apparatus according to claim 1, which is characterized in that the laser emitting module includes pulse laser and expands
Mirror, the beam expanding lens are installed on the transmitting terminal of the pulse laser, wherein the laser pulse warp of the pulse laser transmitting
Emit after the beam expanding lens beam-expanding collimation to the determinand.
3. device according to claim 1 or 2, which is characterized in that the fluorescence reception module includes convergent lens, filters
Piece and enhancing charge-coupled device ICCD, the convergent lens are installed on the front end of the optical filter, and the optical filter is installed on
The receiving end of the ICCD, wherein the fluorescence signal sequentially passes through the convergent lens, the optical filter and the ICCD.
4. device according to claim 3, which is characterized in that the wavelength of the laser emitting module transmitting is 355nm, institute
State optical filter allow by wave band be 450nm to 510nm.
5. device according to claim 4, which is characterized in that the field angle of the convergent lens is 1mrad, the laser
The pulse frequency of transmitting module is 100Hz, and the energy of the single laser pulse of the laser emitting module transmitting is 5 μ J.
6. device according to claim 1 or 2, which is characterized in that the detection range of the fluorescent material detection device is
5m is between 15m, wherein the detection range is distance of the fluorescent material detection device to the determinand.
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| CN108956560A (en) * | 2018-06-05 | 2018-12-07 | 北京目黑科技有限公司 | A kind of fluorescent material detection device and method |
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