CN105158218A - Non-contact monitoring device and method for floating oil on water surface - Google Patents
Non-contact monitoring device and method for floating oil on water surface Download PDFInfo
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- CN105158218A CN105158218A CN201510451053.XA CN201510451053A CN105158218A CN 105158218 A CN105158218 A CN 105158218A CN 201510451053 A CN201510451053 A CN 201510451053A CN 105158218 A CN105158218 A CN 105158218A
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Abstract
The invention provides a non-contact monitoring device for floating oil on a water surface. The device comprises a UV broadband spectrum light source, an optical filter, an optical filter rotating wheel, a transmitting lens, a receiving lens, a multispectral detector and a control and signal processor, wherein the UV broadband spectrum light source, the optical filter and the transmitting lens compose a transmitting light path, the receiving lens and the multispectral detector compose a receiving light path, the optical filter rotates under the driving of the optical filter rotating wheel, and the optical filter rotating wheel, the UV broadband spectrum light source and the multispectral detector are connected with the control and signal processor. The invention has the following beneficial effects: a multispectral light source and the multispectral detector are employed, and a false alarm rate is reduced to a lowest extent by using two work modes; and the non-contact monitoring device has the advantages of low cost, no contact and real-time monitoring. The invention also discloses a non-contact monitoring method for floating oil on the water surface.
Description
Technical field
The present invention relates to a kind of contactless oil slick monitoring device and method, belong 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.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of contactless oil slick monitoring device and method, having low cost, noncontact, Real-Time Monitoring, advantage that false alarm rate is low, adjustable point is settled, and is suitable for promoting on a large scale.
Technical scheme of the present invention 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 invention has the beneficial effects as follows and 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 of the present invention 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, technical scheme of the present invention is specifically addressed; it is to be noted; technical scheme of the present invention is not limited to the embodiment described in embodiment; the content of those skilled in the art's reference and reference technical solution of the present invention; the improvement that basis of the present invention is carried out and design, should belong to protection scope of the present invention.
As Figure 1-4, the contactless oil slick monitoring device of one described in the embodiment of the present invention, 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 (10)
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, ultraviolet broad spectrum light source preferred pulse xenon source.
3. 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.
4. 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.
5. a kind of contactless oil slick monitoring device as claimed in claim 1, it is characterized in that, described transmitting camera lens adopts and through the simple lens of 200 ~ 400nm light, can be preferably plano-convex fused quartz lens, controls by the selection of simple lens focal length the Distance geometry spot size projecting the water surface.
6. a kind of contactless oil slick monitoring device as claimed in claim 1, it is characterized in that, described reception camera lens adopts can through the simple lens of 400 ~ 700nm light, being preferably plano-convex K9 glass lens, by selecting suitable simple lens focal length, the light of spot area being converged on multispectral sensing device light-sensitive surface.
7. a kind of contactless oil slick monitoring device as claimed in claim 1, it is characterized in that, 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.
8. one kind uses the monitoring method of contactless oil slick monitoring device described in any one of claim 1 to 7, adopt ultraviolet broad spectrum light source, broad-spectrum beam projects monitored water-surface areas by transmitting camera lens after optical filter filters, obtain the excitation source of multiple spectrum by changing optical filter, thus inspire multiple different fluorescence spectrum.
9. monitoring method as claimed in claim 8, is characterized in that, fluorescence excitation adopts multispectral sensing device to receive, and judges the existence of water surface oil by analyzing the multispectral fluorescence information gathered.
10. monitoring method as claimed in claim 8, it is characterized in that, 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.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109520478A (en) * | 2018-12-05 | 2019-03-26 | 深圳市道通智能航空技术有限公司 | A kind of water detection method, apparatus and unmanned plane |
| CN110044559A (en) * | 2019-05-22 | 2019-07-23 | 武汉市立格生信科技有限公司 | A kind of Oil Leakage Detecting method, system and device |
| CN110487760A (en) * | 2019-08-23 | 2019-11-22 | 山东省科学院海洋仪器仪表研究所 | Optical module that is a kind of while measuring light oil and mink cell focus in water |
| CN110780282A (en) * | 2019-10-25 | 2020-02-11 | 深圳煜炜光学科技有限公司 | Multi-line laser radar with synchronous parallel scanning function and control method |
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Application publication date: 20151216 |