CN204964392U - Non -contact surface of water oil slick monitoring devices - Google Patents
Non -contact surface of water oil slick monitoring devices Download PDFInfo
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- CN204964392U CN204964392U CN201520555065.2U CN201520555065U CN204964392U CN 204964392 U CN204964392 U CN 204964392U CN 201520555065 U CN201520555065 U CN 201520555065U CN 204964392 U CN204964392 U CN 204964392U
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- oil slick
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- optical filter
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Abstract
The utility model provides a non -contact surface of water oil slick monitoring devices, includes the wide spectroscopic light source of ultraviolet, light filter, light filter runner, transmission camera lens, receives camera lens, many spectral detection ware and control and signal processor, wherein the transmission light path is formed to the wide spectroscopic light source of ultraviolet, light filter and transmission camera lens, receive camera lens, many spectral detection ware constitution receipt light path, the light filter is rotatory under the drive of light filter runner, the wide spectroscopic light source of light filter runner, ultraviolet and many spectral detection ware with control is connected with signal processor. The beneficial effects of the utility model are that adopt multispectral light source and many spectral detection ware to it is minimum to make the false alarm rate fall to through two kinds of mode, and has low cost, non -contact and real -time supervision's advantage simultaneously.
Description
Technical field
The utility model relates to a kind of contactless oil slick monitoring device, belongs to photoelectric sensor technical field.
Background technology
Carrying out along with mankind's activity, in rapid succession, leakage of oil can float on the water surface to various water surface leakage of oil event, not only can bring huge economic loss to society, also can bring immeasurable environment and ecology influence.Although there is the various preparation preventing water surface leakage of oil, due to unpredictability and the instantaneity of leakage of oil event, how to determine that remaining of leakage of oil event prevents from endangering the most effectual way spread in the very first time.
In various oil slick monitoring technology, most critical be exactly can low cost, in real time, noncontact, high reliability the existence of detection oil slick.UV light-induced fluorescence is a kind of highly sensitive contactless oil slick detection method.Launch the light beam of short wavelength to the water surface, the longer fluorescence of wavelength can be inspired, by can realize the detection of oil slick to the detection of fluorescence when the water surface exists the oily substance containing polynuclear aromatics.
Existingly carry out in the technology of oil slick detection based on UV light-induced fluorescence, although adopt the method for laser radar detection to have very high sensitivity, but structure is very complicated, cost is very high, cannot arrange at multiple point of fixity and monitor continuously, also there is excitation wavelength limited, the shortcoming that detection false alarm rate is high simultaneously.
Although adopt laser-induced fluorescence (LIF) and carry out oil slick monitoring with spectrometer collection fluorescence continuous spectrum and there is good recognition capability, there is the shortcoming that sensitivity of spectrograph is low, cost is high, be difficult to promote on a large scale.
There is the equipment carrying out oil slick detection using arrowband ultraviolet LED as excitation source in recent years, but because current powerful ultraviolet LED only has 365nm wavelength, better to effect during the heavy oil detections such as crude oil, poor effect when lightweight oil is detected, and because excitation source wavelength is limited, detecting band only has one, makes false alarm rate high, is difficult to difference to other material that can produce fluorescence of floating on water.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of contactless oil slick monitoring device, has low cost, noncontact, Real-Time Monitoring, advantage that false alarm rate is low, and adjustable point is settled, and is suitable for promoting on a large scale.
The technical solution of the utility model is:
A kind of contactless oil slick monitoring device, comprise ultraviolet broad spectrum light source, optical filter, optical filter runner, launch camera lens, receive camera lens, multispectral sensing device and control and signal processor, wherein said ultraviolet broad spectrum light source, optical filter become to launch light path with transmitting mirror head group, described reception camera lens, multispectral sensing device composition receiving light path, described optical filter rotates under optical filter runner drives, and described optical filter runner, ultraviolet broad spectrum light source are connected with signal processor with described control with multispectral sensing device.
Ultraviolet broad spectrum light source sends wide spectral ultraviolet light, wide spectral ultraviolet light beam only have after optical filter required spectral coverage through, monitored water-surface areas is projected again through launching camera lens, receive camera lens receive the fluorescence signal that is excited and converge on multispectral sensing device, controller synchro control light source and detector, gather photo detector signal to go forward side by side row relax, judged whether that oil slick exists.
The spectral radiance of described ultraviolet broad spectrum light source at least covers 200 ~ 400nm spectral range, ultraviolet broad spectrum light source preferred pulse xenon source.
Described optical filter comprises a slice broad band pass filter that passband is 200 ~ 400nm and the passband multi-disc narrow band pass filter in 200 ~ 400nm scope.Under modes of warning, optical filter is fixed on 200 ~ 400nm position, and under judgment model, other several optical filter orders change use.
Described multispectral sensing device is the photodiode array of light-sensitive surface plating narrow-band-filter film, and passband covers 400 ~ 700nm scope.
Described transmitting camera lens adopts and through the simple lens of 200 ~ 400nm light, can be preferably plano-convex fused quartz lens.The Distance geometry spot size projecting the water surface is controlled by the selection of simple lens focal length.
Described reception camera lens adopts and through the simple lens of 400 ~ 700nm light, can be preferably plano-convex K9 glass lens.By selecting suitable simple lens focal length, the light of spot area is converged on multispectral sensing device light-sensitive surface.
Described control and signal processor are coordinated ultraviolet broad spectrum light source, detector and optical filter runner and are worked, and comprise the driving of ultraviolet broad spectrum light source, the driving of multispectral sensing device, the control of optical filter runner, Signal Pretreatment, spectroscopic data process, external interface.Control with signal processor by the synchro control to ultraviolet broad spectrum light source, optical filter runner, multispectral sensing device, realize the acquisition of oil slick fluorescence data, the result whether having oil slick is drawn, by external interface as wireless communication interface is transferred to host computer further by data processing.
A kind of contactless oil slick monitoring method, adopt ultraviolet broad spectrum light source, broad-spectrum beam projects monitored water-surface areas by transmitting camera lens after optical filter filters, and obtains the excitation source of multiple spectrum, thus inspire multiple different fluorescence spectrum by changing optical filter.
Fluorescence excitation adopts multispectral sensing device to receive, and judges the existence of water surface oil by analyzing the multispectral fluorescence information gathered.
Divide early warning and judge two kinds of mode of operations, under modes of warning, select broadband belt pass filter, keeping when there is no fluorescence signal fixing, when there is fluorescence signal, adopting judgment model, change multiple optical filter, gather the multispectral fluorescence signal under different excitation source, utilize multiple data to judge, reduce false alarm rate.
The beneficial effects of the utility model adopt multispectral light source and multispectral sensing device, and it is minimum by two kinds of mode of operations, false alarm rate to be dropped to; And there is the advantage of low cost, noncontact and Real-Time Monitoring simultaneously.
Accompanying drawing explanation
Fig. 1 is one described in the utility model contactless oil slick monitoring device schematic diagram.
In figure:
1 is broad spectrum light source, and 2 is optical filter, and 3 for launching camera lens, and 4 be exciting light light beam, and 5 be the water surface to be measured, 6 fluorescent light beam for exciting, and 7 for receiving camera lens, and 8 is multispectral sensing device, and 9 is control and signal processor, and 10 is optical filter runner.
Fig. 2 is the filter coating passband curve of multispectral sensing device.
Fig. 3 is for controlling and signal processor function block diagram.
Fig. 4 is oil slick monitoring device workflow diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is specifically addressed; it is to be noted; the technical solution of the utility model is not limited to the embodiment described in embodiment; the content of those skilled in the art's reference and reference technical solutions of the utility model; the improvement that basis of the present utility model is carried out and design, should belong to protection domain of the present utility model.
As Figure 1-4, the contactless oil slick monitoring device of one described in the utility model embodiment, comprise ultraviolet broad spectrum light source, optical filter, optical filter runner, launch camera lens, receive camera lens, multispectral sensing device and control and signal processor, wherein said ultraviolet broad spectrum light source, optical filter becomes to launch light path with transmitting mirror head group, described reception camera lens, multispectral sensing device composition receiving light path, described optical filter rotates under optical filter runner drives, described optical filter runner, ultraviolet broad spectrum light source is connected with signal processor with described control with multispectral sensing device.
Ultraviolet broad spectrum light source sends wide spectral ultraviolet light, wide spectral ultraviolet light beam only have after optical filter required spectral coverage through, monitored water-surface areas is projected again through launching camera lens, receive camera lens receive the fluorescence signal that is excited and converge on multispectral sensing device, controller synchro control light source and detector, gather photo detector signal to go forward side by side row relax, judged whether that oil slick exists.
The spectral radiance of described ultraviolet broad spectrum light source at least covers 200 ~ 400nm spectral range, ultraviolet broad spectrum light source preferred pulse xenon source.
Described optical filter comprises a slice broad band pass filter that passband is 200 ~ 400nm and the passband multi-disc narrow band pass filter in 200 ~ 400nm scope.Under modes of warning, optical filter is fixed on 200 ~ 400nm position, and under judgment model, other several optical filter orders change use.
Described multispectral sensing device is the photodiode array of light-sensitive surface plating narrow-band-filter film, and passband covers 400 ~ 700nm scope.
Described transmitting camera lens adopts and through the simple lens of 200 ~ 400nm light, can be preferably plano-convex fused quartz lens.The Distance geometry spot size projecting the water surface is controlled by the selection of simple lens focal length.
Described reception camera lens adopts and through the simple lens of 400 ~ 700nm light, can be preferably plano-convex K9 glass lens.By selecting suitable simple lens focal length, the light of spot area is converged on multispectral sensing device light-sensitive surface.
Described control and signal processor are coordinated ultraviolet broad spectrum light source, detector and optical filter runner and are worked, and comprise the driving of ultraviolet broad spectrum light source, the driving of multispectral sensing device, the control of optical filter runner, Signal Pretreatment, spectroscopic data process, external interface.Control with signal processor by the synchro control to ultraviolet broad spectrum light source, optical filter runner, multispectral sensing device, realize the acquisition of oil slick fluorescence data, the result whether having oil slick is drawn, by external interface as wireless communication interface is transferred to host computer further by data processing.
A kind of contactless oil slick monitoring method, adopt ultraviolet broad spectrum light source, broad-spectrum beam projects monitored water-surface areas by transmitting camera lens after optical filter filters, and obtains the excitation source of multiple spectrum, thus inspire multiple different fluorescence spectrum by changing optical filter.
Fluorescence excitation adopts multispectral sensing device to receive, and judges the existence of water surface oil by analyzing the multispectral fluorescence information gathered.
Divide early warning and judge two kinds of mode of operations, under modes of warning, select broadband belt pass filter, keeping when there is no fluorescence signal fixing, when there is fluorescence signal, adopting judgment model, change multiple optical filter, gather the multispectral fluorescence signal under different excitation source, utilize multiple data to judge, reduce false alarm rate.
Wherein:
Broad spectrum light source selects 60W pulse xenon lamp;
Optical filter runner is integrated with multi-disc narrow band pass filter and a slice broad band pass filter, wherein, broad band pass filter free transmission range is 200 ~ 400nm, and narrow band pass filter is the bandpass filter segmented between 200 ~ 400nm.
Launch camera lens aperture 50mm, focal length 100mm, adopt and melt quartz material, passband is 200 ~ 400nm;
Receive camera lens aperture 50mm, focal length 100mm, adopt K9 glass material, passband is 400 ~ 700nm;
Select the multispectral photodiode array of 8 narrow band channels, each passage only responds the light signal of particular range of wavelengths between 400 ~ 700nm and is converted to electric signal.8 narrow band channel centre wavelengths are respectively: 430nm, 460nm, 490nm, 515nm, 560nm, 615nm, 660nm, 695nm, and bandwidth is 10nm.
Control with signal processor optional technical grade M3 type arm processor (as STM32F103) as control core, multispectral sensing device drives selects AD8615 to form lock-in amplifier, Signal Pretreatment part is analog filtering and analog to digital conversion mainly, can adopt AD7798.External interface can select RS485 or GPRS.
When equipment works in modes of warning, optical filter runner turns in broadband belt pass filter place, the light that light source sends obtains continuous print exciting light between 200 ~ 400nm through broadband belt pass filter, be irradiated on the water surface after launching camera lens optically focused again, the fluorescence signal that water surface stimulated emission produces is after receiving camera lens and assembling, by to control and signal processor controls the fluorescence signal that multispectral photodiode array obtains different spectral coverage between 400 ~ 700nm, afterwards, control to process collection signal with signal processor, by more tentatively judging whether to there is oil film with the threshold value of setting, when for there is oil film in preliminary judged result, equipment enters judgment model.
When equipment works in judgment model, optical filter runner starts to rotate changes different optical filters, optical filter often turns to a kind of optical filter place, the light that light source sends obtains the exciting light of specific wavelength through this optical filter, be irradiated on water-surface oil film through launching after camera lens is assembled again, oil film is excited to excite the fluorescence signal of generation to assemble through receiving camera lens, then by control and signal processor controls the fluorescence signal that multispectral photodiode array obtains different spectral coverage between 400 ~ 700nm.Control to control optical filter runner in an orderly manner from signal processor to switch between different optical filter, to obtain the exciting light of different wave length, control the fluorescence spectrum that multispectral photodiode array obtains the generation of corresponding wavelength excitation simultaneously.After the multispectral fluorescence signal excited when all excitation wavelengths all gathers, image data forms a three-dimensional fluorescence spectrogram (excitation wavelength, wavelength of fluorescence, fluorescence intensity), image data is carried out to the overall treatments such as spectral pattern coupling, get rid of the impact easily causing interfering material, judge whether the water surface exists oil film exactly.Compared with modes of warning, it is minimum that the quantity of information that increase gathers makes False Rate drop to.
Claims (9)
1. a contactless oil slick monitoring device, comprise ultraviolet broad spectrum light source, optical filter, optical filter runner, launch camera lens, receive camera lens, multispectral sensing device and control and signal processor, it is characterized in that, wherein said ultraviolet broad spectrum light source, optical filter become to launch light path with transmitting mirror head group, described reception camera lens, multispectral sensing device composition receiving light path, described optical filter rotates under optical filter runner drives, and described optical filter runner, ultraviolet broad spectrum light source are connected with signal processor with described control with multispectral sensing device.
2. a kind of contactless oil slick monitoring device as claimed in claim 1, it is characterized in that, the spectral radiance of described ultraviolet broad spectrum light source at least covers 200 ~ 400nm spectral range.
3. a kind of contactless oil slick monitoring device as claimed in claim 2, it is characterized in that, ultraviolet broad spectrum light source is xenon flash light source.
4. a kind of contactless oil slick monitoring device as claimed in claim 1, is characterized in that, described optical filter comprises a slice broad band pass filter that passband is 200 ~ 400nm and the passband multi-disc narrow band pass filter in 200 ~ 400nm scope.
5. a kind of contactless oil slick monitoring device as claimed in claim 1, is characterized in that, described multispectral sensing device is the photodiode array of light-sensitive surface plating narrow-band-filter film, and passband covers 400 ~ 700nm scope.
6. a kind of contactless oil slick monitoring device as claimed in claim 1, is characterized in that, described transmitting camera lens adopts can through the simple lens of 200 ~ 400nm light.
7. a kind of contactless oil slick monitoring device as claimed in claim 6, is characterized in that, launching camera lens is plano-convex fused quartz lens.
8. a kind of contactless oil slick monitoring device as claimed in claim 1, is characterized in that, described reception camera lens adopts can through the simple lens of 400 ~ 700nm light.
9. a kind of contactless oil slick monitoring device as claimed in claim 8, it is characterized in that, described reception camera lens is plano-convex K9 glass lens.
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| CN201520555065.2U CN204964392U (en) | 2015-07-28 | 2015-07-28 | Non -contact surface of water oil slick monitoring devices |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158218A (en) * | 2015-07-28 | 2015-12-16 | 青岛市光电工程技术研究院 | Non-contact monitoring device and method for floating oil on water surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158218A (en) * | 2015-07-28 | 2015-12-16 | 青岛市光电工程技术研究院 | Non-contact monitoring device and method for floating oil on water surface |
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