CN106769882A - Spilled oil monitoring instrument and its monitoring method - Google Patents
Spilled oil monitoring instrument and its monitoring method Download PDFInfo
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- CN106769882A CN106769882A CN201611232149.8A CN201611232149A CN106769882A CN 106769882 A CN106769882 A CN 106769882A CN 201611232149 A CN201611232149 A CN 201611232149A CN 106769882 A CN106769882 A CN 106769882A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The invention discloses a kind of spilled oil monitoring instrument and its monitoring method.The spilled oil monitoring instrument includes：Light supply apparatus, is configured to send first band optical signal to target area to be detected, to form second band optical signal in the target area；Photodetector, is configured to carry out opto-electronic conversion to the second band optical signal for receiving, to obtain detecting electric signal；Processor, is configured to judge whether oil spilling according to the detection electric signal；Alarm, is configured to produce alarm signal.The present invention is by the light supply apparatus using pulsed UV light source, both power is reduced, also allow for measuring the background value on sea, judge whether oil spilling and exclude wrong report situation with the method that background is relatively combined with Threshold Analysis, improve the efficiency and accuracy rate of monitoring, being set using double optical filters can exclude main interference, reduce bias light so as to improve signal to noise ratio.
Description
Technical field
The invention belongs to spilled oil monitoring technical field, specifically, it is related to a kind of spilled oil monitoring instrument and its monitoring method.
Background technology
With the fast development of industrial construction, every country is increasing to the dependence of oil, make oil production rate and
While being continuously increased of freight volume, oil spill accident also frequently occurs, and faces the business unit for being related to Petroleum Production and transport
Huge pressure.Oil spill accident occurs not only to bring economic loss to enterprise, and return environment caused with society it is huge
Big disaster, if we can in time have found oil spilling source and to be processed at the initial stage in oil spilling, will greatly reduce us and receive
To loss and polluting of being subjected to.Therefore, people need badly it is a kind of can real-time monitoring oil spilling situation and send alarm signal be
System.And existing satellite monitoring is low for the monitoring accuracy of a small range of pollution, not only the degree of accuracy is low for the long-range monitoring of radar, and
High cost, without real-time etc., in addition, some contact-type detectors then need timed maintenance in order to avoid detector breaks down,
Such detector generally requires artificial sample and takes back test in laboratory, it is impossible to realize monitoring round-the-clockly in real time the oil spilling on sea
Situation, so that the human cost for needing is higher.
Therefore, prior art also needs also to need to improve and develop.
The content of the invention
It is with low cost, real it is an object of the invention to provide one kind in order to solve above-mentioned problems of the prior art
Shi Xinggao and the extremely low spilled oil monitoring instrument of rate of false alarm and its monitoring method.
The invention provides a kind of spilled oil monitoring method, the spilled oil monitoring method includes：
S1, within the first sampling period, send first band optical signal to the target area without ultraviolet source irradiation, with
Obtain the first background value；
S2, within the second sampling period, send first band optical signal to the target area without ultraviolet source irradiation, with
Obtain the second background value and send first band optical signal to by ultraviolet source irradiation target area, to obtain the first signal
Value；
S3, difference operation is made according to second background value and first signal value, to obtain for the second sampling period pair
The first signal difference answered；
Whether the first signal difference described in S4, comparing is more than lower threshold and less than upper limit threshold, the upper limit threshold quilt
The pure oily signal difference obtained in laboratory test is configured to, the lower threshold is configured as without oil spilling or other impurity
Under conditions of, it is higher by the value of the sea signal difference 30%~50% for measuring；If so, then performing step S6；If it is not, not reporting then
It is alert；
Whether S5, the actual ratio for calculating second background value and first background value, judge the actual ratio
Less than the reference ratio, the reference ratio is configured as one and refers to constant, if so, then performing step S6；If it is not, not reporting then
It is alert；
After S6, time delay, step S7 is continued executing with；
S7, detection obtain the 3rd background value and secondary signal value after time delay, and are calculated the secondary signal after time delay
Difference；
Whether secondary signal difference described in S8, comparing is more than the lower threshold and less than the upper limit threshold；If so, then
Alarm；If it is not, not alarming then.
Further, step S1 includes：Within the first sampling period, first band optical signal is sent to without ultraviolet source
The target area of irradiation, to form the first optical signal in the target area；Opto-electronic conversion is carried out to the first optical signal to obtain
One background value.
Further, step S3 includes：Within the second sampling period, first band optical signal is sent to without ultraviolet source
The target area of irradiation, to form the second optical signal in the target area；Opto-electronic conversion is carried out to the second optical signal to obtain
Two background values；First band optical signal to the target area by ultraviolet source irradiation is sent, to form the in the target area
Three optical signals；3rd optical signal is carried out opto-electronic conversion to obtain the first signal value.
Further, the oil spilling detection method also includes：
Optical signal to sending carries out optically focused, the optical signal big to obtain luminous intensity；
Optical signal after optically focused is filtered, to obtain first band optical signal；
The first band optical signal is reflected using speculum；
First band optical signal after reflection is focused to target area.
Further, the spilled oil monitoring method also includes：When alarm, target area is taken pictures, to obtain mesh
The photo in region is marked, and described issuing as before is delivered into detection terminal.
Further, the oil spilling detection method also includes：The height value on sea level is measured, and is adjusted according to the height value
The whole upper limit threshold and the lower threshold.
Present invention also offers a kind of round-the-clock contactless oil spilling detector, with spilled oil monitoring method as described above
Spilled oil monitoring is carried out, the oil spilling detector includes：Light supply apparatus, is configured to send first band optical signal to be detected
Target area, to form second band optical signal in the target area；Photodetector, is configured to the second ripple to receiving
Section optical signal carries out opto-electronic conversion, to obtain detecting electric signal；Processor, is configured to detect that electric signal judges to be according to described
No generation oil spilling；Alarm, is configured to produce alarm signal.
Further, the spilled oil monitoring instrument also includes communication module, and the alarm is also structured to produce alarm signal
Breath, the alarm sends the warning message to monitor terminal by the communication module.
Further, the light supply apparatus includes：LED；Optically focused part, is oppositely arranged with the LED；Narrow-band-filter
Piece, is arranged at the optically focused part back in the side of the LED；Filtering assembly, be arranged at the photodetector enters light
Face；Speculum, narrow band pass filter is arranged between the narrow band pass filter and the filtering assembly, and the speculum normal
Direction is in 45 degree of angles with the filtering assembly；Convex lens, are arranged at the speculum back in the side of the photodetector,
The convex lens are used for light focusing；Wherein, the photodetector, the filtering assembly, the speculum and described convex
Lens are arranged in order setting and align in a first direction, the LED, the optically focused part, the narrow band pass filter and described
Speculum is arranged in order setting and aligns in a second direction, and the first direction is perpendicular to the second direction.
Further, the spilled oil monitoring instrument also includes visible ray camera arrangement, and the processor is also structured to connecing
The visible ray camera arrangement is controlled to be taken pictures after receiving warning message.
Further, the spilled oil monitoring instrument also includes the range unit of the connection processor, and the range unit is used
In the height on measurement sea level, the processor is also structured to the Height Adjustment processor measured according to the range unit
Parameter value.
Beneficial effects of the present invention：
Spilled oil monitoring instrument of the invention and its monitoring method both reduce power, also just by using pulsed UV light source
In the background value on measurement sea, judge whether oil spilling and exclude to miss with the method that background is relatively combined with Threshold Analysis
Report situation, being set using double optical filters can exclude main interference, reduce bias light and improve signal to noise ratio.The present invention is also by setting
Visible Light Camera, further reduction wrong report, saves manpower, and shadow of the sea height change to monitoring is eliminated by adding range unit
Ring, use coaxial optical path system spilled oil monitoring instrument is reduced size, be easy to add cone to improve signal to noise ratio.
Brief description of the drawings
By the following description carried out with reference to accompanying drawing, above and other aspect of embodiments of the invention, feature and advantage
Will become clearer, in accompanying drawing：
Fig. 1 is the module map of the spilled oil monitoring instrument of present pre-ferred embodiments；
Fig. 2 is the structural representation of the light supply apparatus of present pre-ferred embodiments；
Fig. 3 is the flow chart of the spilled oil monitoring method of present pre-ferred embodiments.
Specific embodiment
Hereinafter, with reference to the accompanying drawings to describing embodiments of the invention in detail.However, it is possible to come real in many different forms
Apply the present invention, and the present invention should not be construed as limited to the specific embodiment that illustrates here.Conversely, there is provided these implementations
Example is in order to explain principle of the invention and its practical application, so that others skilled in the art are it will be appreciated that of the invention
Various embodiments and the various modifications for being suitable for specific intended application.Identical label can be used in entire disclosure and accompanying drawing
Represent identical element.
Fig. 1 is the module map of the spilled oil monitoring instrument of present pre-ferred embodiments.
Reference picture 1, spilled oil monitoring instrument according to embodiments of the present invention includes：Light supply apparatus 10, photodetector 20, treatment
Device 30, alarm 40, communication module 50, visible ray camera arrangement 60, range unit 70, time delay module 80.
The light supply apparatus 10 is configured to send first band optical signal to target area to be detected, with target area
Second band optical signal is formed in domain.The light supply apparatus 10 is specially pulsed UV light supply apparatus 10, can be with certain frequency
Rate sends ultraviolet pulse signal.The one side of pulsed UV light supply apparatus 10 reduces overall power, is on the other hand easy to measurement
Background value, reduces ambient noise.First band optical signal is specifically the ultraviolet light that wave band is 300~400nm.Second band light is believed
Number be specifically wave band for 400nm~550nm ultraviolet light.
Fig. 2 is the structural representation of the light supply apparatus of present pre-ferred embodiments.
Reference picture 2, the light supply apparatus 10 includes LED 11, optically focused part 12, narrow band pass filter 13, speculum 14, shading
Cylinder 15, convex lens 16, filtering assembly 17.The light supply apparatus 10 uses coaxial optical path design structure.
Specifically, the LED 11 is specially ultraviolet LED lamp 11, can produce pulsed ultraviolet light, further, can
Send the narrow-band LED light that peak value is 365nm.The LED 11 is arranged at the obliquely downward position of the photodetector 20.
The optically focused part 12 is oppositely arranged with the LED 11, for assembling the light that the LED 11 sends.At this
In embodiment, the optically focused part 12 is preferably prefocus cup, but the present invention is not restricted to this.
The narrow band pass filter 13 is arranged at the optically focused part 12 back in the side of the LED 11, that is to say, that poly-
Light part 12 is arranged between LED 11 and narrow band pass filter 13.In the present embodiment, the bandpass filter is preferably 365nm
Narrow band pass filter 13, for by peak value for 365nm narrow-band LED light.
The filtering assembly 17 is arranged at the outside of the photodetector 20, specific relative located at the photodetector
20 incidence surface, for the second band optical signal that further filtering is returned from target area, to improve the processor 30
Judging nicety rate.Specifically, the filtering assembly 17 includes a bandpass filter with a width of 400nm to 550nm, and one with a width of
The band resistance optical filter of 420nm~500nm.The bandpass filter and the band resistance optical filter are relatively and adjacent to setting.Certainly originally
Invention is not restricted to this.Main wrong report situation phytoplankton in for seawater, chlorophyll is contained in the blade of phytoplankton
Deng pigment, the pigment under certain wavelength (including light source wave band and sunshine) can produce fluorescence, so as to influence spilled oil monitoring instrument
Monitoring result.In order to process this part interference, the embodiment of the present invention sets filtering assembly by photodetector 20
17.Due to oils fluorescence Spectra is wider and fluorescence Spectra of phytoplankton such as algae etc. is concentrated mainly on 450nm or so one it is narrow
Band, therefore the fluorescence of phytoplankton can be blocked in outer, then largely eliminate the prison caused due to phytoplankton
Survey instrument wrong report.Simultaneously as sea is stronger to the reflectivity of blue violet light, the filtering assembly 17 can also stop to a certain extent
Blue violet light from background, makes bias light obtain very big weakening, so as to improve signal to noise ratio to a certain extent.
In order that emergent ray and incident ray are on same axle, the embodiment of the present invention is by light supply apparatus 10 and light
Between electric explorer 20 or say the speculum for setting that inclination angle is 45 ° between narrow band pass filter 13 and filtering assembly 17
14, so it is not only able to make survey meter size in the horizontal direction smaller, and be easy in the vertical direction to set one
Long cone 15, so as to stop sunshine, it is to avoid the influence of sunlight.Speculum 14, cone 15 were combined
The structure setting of filter disc, largely improves signal to noise ratio.Specifically, the speculum 14 is preferably dichroscope.Two
Can be to the light of certain wavelength almost completely through and almost fully reflective to the light of other wavelength to Look mirror.In this implementation
In example, the dichroscope allows the light for more than 409nm by wavelength, and for wavelength for the light of below 409nm is fully reflective.
But the present invention is not restricted to this.
The convex lens 16 are arranged at the speculum 14 back in the side of the photodetector 20.The convex lens
16 is that a focal length is equal to large-caliber convex lens of the eyeglass to the distance of photodiode and for receiving light.The convex lens 16 can be to mesh
The fluorescence for marking field emission plays good convergence effect, the end face for making it converge to photodetector 20.In the present embodiment,
The convex lens 16 are specially planoconvex lens, but the present invention is not restricted to this.
The photodetector 20, filtering assembly 17, in 45 degree setting speculum 14, convex lens 16 be arranged in order setting
And align in a first direction.The LED 11, optically focused part 12, narrow band pass filter 13, in 45 degree setting speculums 14 successively
Spread configuration and align in a second direction.The first direction is perpendicular to the second direction.
Specifically, the first band optical signal (optical signal of 365nm) that LED 11 sends passes sequentially through optically focused part 12, filter
Wave plate, first band optical signal focuses to target area, the target under the reflex of speculum 14 by convex lens 16
Region returns to second band optical signal, and second band optical signal passes sequentially through the scattering of convex lens 16, and passes sequentially through described anti-
Penetrate mirror 14, filtering assembly 17 and reach photodetector 20.
With continued reference to Fig. 1, the photodetector 20 is configured to carry out photoelectricity to the second band optical signal for receiving
Conversion, to obtain detecting electric signal.Photodetector used 20 can be from photodiode, photomultiplier according to sensitivity requirement
Deng being selected in detector.Different detectors can normal work distance it is different, and sensitivity positive correlation.Can be according to actual requirement more
Reelect use.Specifically, in the present embodiment, the photodiode is a quad flat package photodiode.But the present invention
It is not restricted to this.
The alarm 40 is used to produce alarm signal and warning message.
Processor 30, is configured to judge whether oil spilling according to the detection electric signal；Receiving warning message
After control the visible ray camera arrangement 60 to be taken pictures；The Height Adjustment processor 30 measured according to the range unit 70
Parameter value.
The range unit 70 is used to measure the height on sea level.In the present embodiment, setting range unit 70 can keep away
Exempt from the influence that sea level altitude change is caused to measurement, different height, the luminous intensity that detector is detected naturally can not
Together, the upper limit threshold of processor 30, lower threshold are made adjustment according to sea level altitude in real time, is improved to a certain extent
The degree of accuracy and sensitivity of spilled oil monitoring instrument.
The visible ray camera arrangement 60 is used under the control of the processor 30, and sea is taken pictures.Due to
Wrong report is unavoidable in spilled oil monitoring, and in order to further reduce wrong report by artificial, the present embodiment sets one by extra
Visible ray camera arrangement 60, only when warning device occurs oil spilling alarms, is shown in light camera arrangement just under the control of processor 30
Start work, and monitor terminal is sent to by the image that communication module 50 will be photographed.And the visible ray camera arrangement 60
Do not start in other cases, it is ensured that the low-power consumption of monitor.Testing staff can exclude a part simply by substantially picture
Wrong report, is closed by terminal and alarmed.From without needing to site inspection every time, a large amount of manpowers and time cost have been saved.
If having oil spilling to produce really, testing staff can also be made to the substantially situation of oil spilling by the picture of camera and simply be sentenced
It is disconnected, so as to make preliminary treatment in time.
Time delay module 80 is used to provide delay function for monitor.
The course of work of spilled oil monitoring instrument is as follows：Light supply apparatus 10 sends ultraviolet light, and wave band is the first of 300~400nm
Wave band optical signal planoconvex lens 16 is divergent to target area, if there is oil spilling to produce, can return wave band for 400nm~
Second band optical signal is converted to detection electricity by the second band optical signal of 550nm to photodetector 20, photodetector 20
Signal, and detection electric signal is conveyed into processor 30.The processor 30 is sentenced with reference to the algorithm that Threshold Analysis and background compare
Whether disconnected oil spilling to occur, if there is oil spilling, control alarm 40 produces alarm signal and warning message, and alarm 40 is by communication
Module 50 sends the warning message to monitor terminal, or the mobile phone of monitoring personnel, reminds people to process as early as possible.Locate simultaneously
Reason device 30 is also structured to control the visible ray camera arrangement 60 to be taken pictures after warning message is received, the visible ray
Camera arrangement 60 is transferred to monitor terminal by will the take pictures photo that obtains of communication module 50.
Due to not only including seawater or oil spilling in seawater, also including many other materials, other things at this moment how are eliminated
The wrong report that matter causes is also a critically important problem.The embodiment of the present invention additionally provides a kind of Threshold Analysis and compares phase with background
With reference to spilled oil monitoring method, the spilled oil monitoring instrument processes this problem using the spilled oil monitoring method.
It should be noted that monitoring oil spilling situation using only kind of background comparative approach, have one disadvantage in that：Cloudy day or
When being evening, bias light is very weak or does not have, and this when just cannot detect oil spilling using background comparative approach, to solve this
One shortcoming, the monitor of the embodiment of the present application can add a photosensitive LED, the photosensitive LED to use in tool housing part
Serve as background light source when being illuminated at night or low light, so that the background of monitor compares can be normally carried out, reduce wrong report
Rate.
In addition, the sea below spilled oil monitoring instrument is one small oil slick of sailing sometimes, it may be possible to where surprisingly drip, and
It is not oil spilling, at this moment just unnecessary startup alarm 40 is alarmed.To solve this problem, the time delay module 80 of the embodiment of the present invention
There is provided a delay function, for example, a delay time T is set, if after delay time T s, still conforming to above-mentioned alarm bar
Part, it is just final to produce alarm.
Judge whether oil spilling according to the detection electric signal below with reference to Threshold Analysis and background comparative approach.
Fig. 3 is the flow chart of the spilled oil monitoring method of present pre-ferred embodiments.Reference picture 3, according to embodiments of the present invention
Spilled oil monitoring method include：
In step 210, within the first sampling period, first band optical signal to the mesh without ultraviolet source irradiation is sent
Mark region, to obtain the first background value.
Specifically, step 210 includes：
Within the first sampling period, send first band optical signal to the target area without ultraviolet source irradiation, with
The first optical signal is formed in target area；Opto-electronic conversion is carried out to the first optical signal to obtain the first background value.Specifically, utilize
Light supply apparatus 10 sends first band optical signal to the target area without ultraviolet source irradiation, to form the in the target area
One optical signal, carries out opto-electronic conversion to obtain the first background value using 20 pairs of the first optical signals of photodetector.
In a step 220, within the second sampling period, first band optical signal is sent to without ultraviolet source irradiation target
Region, to obtain the second background value and send first band optical signal to by ultraviolet source irradiation target area, to obtain the
One signal value.First sampling period and the second sampling period are that two in monitoring process of spilled oil monitoring instrument continuously adopt
The sample cycle.
Specifically, step 220 includes：
Within the second sampling period, send first band optical signal to the target area without ultraviolet source irradiation, with
The second optical signal is formed in target area；Opto-electronic conversion is carried out to the second optical signal to obtain the second background value.Specifically, utilize
Light supply apparatus 10 sends first band optical signal to the target area without ultraviolet source irradiation, to form the in the target area
Two optical signals, carry out opto-electronic conversion to obtain the second background value using 20 pairs of the second optical signals of photodetector.
First band optical signal to the target area by ultraviolet source irradiation is sent, to form the 3rd in the target area
Optical signal；3rd optical signal is carried out opto-electronic conversion to obtain the first signal value.Specifically, first is sent using light supply apparatus 10
Wave band optical signal to by ultraviolet source irradiation target area, to form the 3rd optical signal in the target area, using photoelectricity
20 pairs of the 3rd optical signals of detector carry out opto-electronic conversion to obtain the first signal value.
In step 230, difference operation is made according to second background value and first signal value, is adopted with obtaining second
Sample cycle corresponding first signal difference.Specifically, it is poor using 30 pairs of the second background values of processor and first signal value
Value computing.
In step 240, whether relatively more described first signal difference is more than lower threshold and less than upper limit threshold；If so,
Then in execution step 250；If it is not, not alarming then.Specifically, compare whether first signal difference is more than using processor 30
Lower threshold and less than upper limit threshold.
It should be noted that the upper limit threshold is configured as the signal difference of the pure oil obtained in laboratory test.Or
Person is that the upper limit threshold is configured as the value of the blank sheet of paper signal difference low 10 or so obtained than detection.Certain this hair
It is bright to be not restricted to this.The upper limit threshold eliminates some interference that very high reflectance article causes, also some non-oils things
Matter excites the interference of the intense fluorescence of generation.The lower threshold is configured as under conditions of without oil spilling or other impurity, high
Go out the value of the sea signal difference 30%~50% for measuring.In the present embodiment, the lower threshold is preferably 300, it is described on
Limit threshold value is preferably 9000, but the present invention is not restricted to this.Because the luminance factor of seawater and oils is closer to, oils due to
Excite fluorescence to produce, signal value is more than seawater, measures the signal value of seawater, will the slightly above signal value value as under threshold value
Limit, while also eliminating the interference that the lower material of some reflectivity causes.
In step 250, the actual ratio of second background value and first background value is calculated, will the second background
Whether value sentences the first background and is worth to actual ratio, the actual ratio is judged less than the reference ratio, if so, then performing
Step S7；If it is not, not alarming then.Herein, second background value and first background value are calculated using processor 30
Actual ratio.
It should be noted that the reference ratio is configured as one and refers to constant.In the present embodiment, the reference ratio
Preferably 3.Certain present invention is not restricted to this.If there is chaff interference on sea, then detected in sampling period
Background value relative to the previous sampling period can great changes will take place, and if on sea only floating oils, in the sampling
Cycle detection background value out compares change with the background value in previous sampling period less, therefore the embodiment of the present invention passes through
Set one and refer to ratio, when signal difference meets during threshold value：Lower threshold<Signal difference<Upper limit threshold, then compare the back of the body
Scape value, if the second background value/the first background value<With reference to ratio, then alarm, if it is not, not alarming then.
In step 260, after time delay T s, step 270 is continued executing with.Herein, the control of processor 30 time delay module is carried out
Time delay.
In step 270, detection obtains the 3rd background value and secondary signal value after time delay T s, and is calculated time delay
Secondary signal difference afterwards.Herein, the 3rd background value and secondary signal after time delay T s are obtained using the detection of the first background value
Value.
In step 280, whether relatively more described secondary signal difference is more than the lower threshold and less than the upper limit threshold
Value；If so, then alarming, i.e., the control of processor 30 alarm 40 produces alarm signal；If it is not, not alarming then.Herein, using place
Whether reason device 30 compares the secondary signal difference more than the lower threshold and less than the upper limit threshold.
The oil spilling detection method also includes：
Optical signal to receiving carries out optically focused, and the optical signal big to obtain luminous intensity herein, is docked using optically focused part 12
The optical signal of receipts carries out optically focused；
Optical signal after optically focused is filtered, to obtain first band optical signal, herein, using narrow band pass filter 13
Optical signal after optically focused is filtered；
The first band optical signal is reflected using speculum, herein, using dichroscope to described first
Wave band optical signal is reflected；
First band optical signal after reflection is focused to target area, herein, using 16 pairs first, convex lens
Wave band optical signal is focused.
The spilled oil monitoring method also includes：When alarm, target area is taken pictures, to obtain the photograph of target area
Piece, and described issuing as before is delivered into detection terminal.Specifically, target area is taken pictures using visible ray camera arrangement 60.
The oil spilling detection method also includes：The height value on sea level is measured, and is adjusted on described according to the height value
Limit threshold value and the lower threshold.Specifically, the height value on sea level is measured using range unit 70.
Specifically, in the present embodiment, under the conditions of clean clear water, the first background value when not opened the light source is detected
It is 100, an oil of at this moment sailing detects that the second background value changes when obtaining being not switched on light supply apparatus 10 are little, is 200 left
The right side, while it is 2000 to open the first signal value measured during light supply apparatus 10, now the first signal difference is 2000-200=
1800, because 1800 between 300~9000, and contexts value compares 200/100<3；At this moment, it is necessary to enter line delay T s,
If still meeting this condition after time delay T s, that is, alarm, if signal value recovers normal in T s, do not alarm.
If it should be noted that sail come be wood, measure do not open the light source when background value very greatly 1000 or so, that
The first background value and the ratio of the second background value for measuring are 1000/100>3, at this moment no matter whether signal value or not threshold interval
Do not alarm inside, and it is reference more to be changed greatly previous with appearance with rear backdrop, until recovering normal.While some non-oil
Material cuts the material for producing fluorescence, such as some organic solvents, and its signal difference can be higher than the upper limit threshold 9000 for setting, equally
Will not alarm.
In sum, the spilled oil monitoring instrument of the embodiment of the present invention both reduces power by using pulsed UV light source,
It is easy to measure the background value on sea, oil spilling and exclusion is judged whether with the method that background is relatively combined with Threshold Analysis
Wrong report situation, being set using double optical filters can exclude main interference, reduce bias light and improve signal to noise ratio.The present invention is also by adding
Plus light supply apparatus, make spilled oil monitoring instrument night also can normal work to exclude wrong report situation exactly, by setting visible ray
Camera, it is further to reduce wrong report, manpower is saved, influence of the sea height change to monitoring is eliminated by adding range unit, adopt
Spilled oil monitoring instrument is reduced size with coaxial optical path system, be easy to add cone to improve signal to noise ratio.
Although the present invention has shown and described with reference to specific embodiment, it should be appreciated by those skilled in the art that：
In the case where the spirit and scope of the present invention limited by claim and its equivalent are not departed from, can carry out herein form and
Various change in details.
Claims (11)
1. a kind of spilled oil monitoring method, it is characterised in that the spilled oil monitoring method includes：
S1, within the first sampling period, first band optical signal to the target area without ultraviolet source irradiation is sent, to obtain
First background value；
S2, within the second sampling period, first band optical signal to the target area without ultraviolet source irradiation is sent, to obtain
Second background value and first band optical signal is sent to by ultraviolet source irradiation target area, to obtain the first signal value；
S3, difference operation is made according to second background value and first signal value, it is corresponding to obtain for the second sampling period
First signal difference；
Whether more than lower threshold and less than upper limit threshold, the upper limit threshold is configured first signal difference described in S4, comparing
It is the signal difference of the pure oil obtained in laboratory test, the lower threshold is configured as in the bar without oil spilling or other impurity
Under part, the value of the sea signal difference 30%~50% for measuring is higher by；If so, then performing step S6；If it is not, not alarming then；
S5, the actual ratio for calculating second background value and first background value, judge whether the actual ratio is less than
The reference ratio, the reference ratio is configured as one and refers to constant, if so, then performing step S6；If it is not, not alarming then；
After S6, time delay, step S7 is continued executing with；
S7, detection obtain the 3rd background value and secondary signal value after time delay, and are calculated the secondary signal difference after time delay；
Whether secondary signal difference described in S8, comparing is more than the lower threshold and less than the upper limit threshold；If so, then reporting
It is alert；If it is not, not alarming then.
2. spilled oil monitoring method according to claim 1, it is characterised in that step S1 includes：Within the first sampling period,
First band optical signal to the target area without ultraviolet source irradiation is sent, to form the first optical signal in the target area；
Opto-electronic conversion is carried out to the first optical signal to obtain the first background value.
3. spilled oil monitoring method according to claim 2, it is characterised in that step S3 includes：Within the second sampling period,
First band optical signal to the target area without ultraviolet source irradiation is sent, to form the second optical signal in the target area；
Opto-electronic conversion is carried out to the second optical signal to obtain the second background value；
First band optical signal to the target area by ultraviolet source irradiation is sent, to form the 3rd light letter in the target area
Number；3rd optical signal is carried out opto-electronic conversion to obtain the first signal value.
4. the spilled oil monitoring method according to any one of claims 1 to 3, it is characterised in that the oil spilling detection method is also
Including：
Optical signal to sending carries out optically focused, the optical signal big to obtain luminous intensity；
Optical signal after optically focused is filtered, to obtain first band optical signal；
The first band optical signal is reflected using speculum；
First band optical signal after reflection is focused to target area.
5. the spilled oil monitoring method according to any one of claims 1 to 3, it is characterised in that the spilled oil monitoring method is also
Including：When alarm, target area is taken pictures, to obtain the photo of target area, and approved for distribution the delivering to detected eventually
End.
6. the spilled oil monitoring method according to any one of claims 1 to 3, it is characterised in that the oil spilling detection method is also
Including：The height value on sea level is measured, and the upper limit threshold and the lower threshold are adjusted according to the height value.
7. a kind of round-the-clock contactless oil spilling detector, is entered with the spilled oil monitoring method described in any one of claim 1 to 6
Row spilled oil monitoring, it is characterised in that including：
Light supply apparatus, is configured to send first band optical signal to target area to be detected, to be formed in the target area
Second band optical signal；
Photodetector, is configured to carry out opto-electronic conversion to the second band optical signal for receiving, to obtain detecting electric signal；
Processor, is configured to judge whether oil spilling according to the detection electric signal；
Alarm, is configured to produce alarm signal.
8. spilled oil monitoring instrument according to claim 7, it is characterised in that the spilled oil monitoring instrument also includes communication module,
The alarm is also structured to produce warning message, the alarm to send the warning message extremely by the communication module
Monitor terminal.
9. spilled oil monitoring instrument according to claim 7, it is characterised in that the light supply apparatus includes：
LED；
Optically focused part, is oppositely arranged with the LED；
Narrow band pass filter, is arranged at the optically focused part back in the side of the LED；
Filtering assembly, is arranged at the incidence surface of the photodetector；
Speculum, narrow band pass filter is arranged between the narrow band pass filter and the filtering assembly, and the speculum method
Line direction is in 45 degree of angles with the filtering assembly；
Convex lens, are arranged at the speculum back in the side of the photodetector, and the convex lens are used for poly- to light
It is burnt；
Wherein, the photodetector, the filtering assembly, the speculum and the convex lens are arranged in order setting and the
On one direction align, the LED, the optically focused part, the narrow band pass filter and the speculum be arranged in order setting and
Alignd in second direction, the first direction is perpendicular to the second direction.
10. the spilled oil monitoring instrument according to any one of claim 7~9, it is characterised in that the spilled oil monitoring instrument also includes
Visible ray camera arrangement, the processor is also structured to control the visible ray camera arrangement to enter after warning message is received
Row is taken pictures.
The 11. spilled oil monitoring instrument according to any one of claim 7~9, it is characterised in that the spilled oil monitoring instrument also includes
The range unit of the processor is connected, the range unit is used to measure the height on sea level, and the processor is also constructed
It is the parameter value of the Height Adjustment processor measured according to the range unit.
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