CN208547571U - Water body optical attenuation coefficient measuring device - Google Patents
Water body optical attenuation coefficient measuring device Download PDFInfo
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- CN208547571U CN208547571U CN201820400446.7U CN201820400446U CN208547571U CN 208547571 U CN208547571 U CN 208547571U CN 201820400446 U CN201820400446 U CN 201820400446U CN 208547571 U CN208547571 U CN 208547571U
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Abstract
The utility model discloses a kind of water body optical attenuation coefficient measuring devices, including light source, detector, the first driving mechanism and the second driving mechanism for being connect with detector and driving detector mobile, the spot-size detection unit for being set to the front of detector along optical path and being connect with the first driving mechanism, and the central processing unit being connect with detector and spot-size detection unit, first driving mechanism drives detector to move along optical path, second driving mechanism drives detector to carry out motion scan along the plane of vertical optical axis, the size of the test surface of detector is less than the size of the hot spot of required detection.The size of hot spot is detected by spot-size detection unit, then the second driving mechanism drives detector to carry out motion scan, obtain the parameter information of entire hot spot, detector is driven to move along optical path by the first driving mechanism, measure the corresponding parameter information data of different distance, it is fitted for obtained multiple groups measurement data, obtains the optical attenuation coefficient value of water body.
Description
Technical field
The utility model relates to underwater optics field of detecting, and in particular to a kind of water body optical attenuation coefficient measuring device.
Background technique
In recent years, underwater optics detection using more and more extensive, including water pollution detection, laser acquisition etc., and show
Some underwater optics imaging devices do not have general performance indicator and standard, i.e., different imaging devices is under different water conditions
There is no relevance between obtained the farest imaging range result.Currently, measuring Underwater Imaging under the general varying environment of academia
The performance parameter of distance is described using optical attenuation coefficient and its multiple, however absorption and scattering due to water body to light
It is very complicated physical process, the accurate attenuation coefficient for measuring water body is extremely difficult.Currently, instrument is generallyd use in the world to see
The decaying of light energy in water is surveyed, to determine its attenuation coefficient to light, the AC series attenuation coefficient produced such as Wet-labs is surveyed
Instrument is measured, however the price of the product reaches millions of, is not particularly suited for business application.
Therefore it provides a kind of at low cost, easy to use, accurate water body optical attenuation coefficient measuring device of measurement is current
The important link of underwater optics Detection Techniques development.
Utility model content
The utility model for the technical problems in the prior art, provides a kind of at low cost, easy to use, measurement
Accurate water body optical attenuation coefficient measuring device.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is:
A kind of water body optical attenuation coefficient measuring device, including light source, detector, connect with the detector and drive institute
Detector mobile the first driving mechanism and the second driving mechanism are stated, be set to the front of the detector along optical path and is driven with first
The spot-size detection unit of motivation structure connection, and the central processing being connect with the detector and spot-size detection unit
Device, first driving mechanism drive detector to move along optical path, and second driving mechanism drives the detector along vertical
The plane of optical axis carries out motion scan, and the size of the test surface of the detector is less than the size of the hot spot of required detection.
Further, the light source is continuous radiant, and the detector is illumination photometer or power meter or single point detector
Or planar array detector.
Further, the test surface of the detector is rectangular-shaped.
It further, further include the aperture diaphragm being located in front of the detector along optical path, the light passing of the aperture diaphragm
Hole is rectangular-shaped.
Further, the central processing unit is single-chip microcontroller.
The utility model also provides the measurement method of above-mentioned water body optical attenuation coefficient measuring device, including following step
It is rapid:
S1: spot-size detection unit measures the initial area for the hot spot that light source issues, and the second driving mechanism is first according to this
Beginning area drives the initial parameter information of detector traverse measurement hot spot, and measurement data is uploaded to central processing unit, this is first
Beginning parameter information is initial irradiance value or prompt radiation performance number or initial signal intensity value；
S2: the first driving mechanism drives detector, the second driving mechanism and spot-size detection unit to move along optical path
A distance, spot-size detection unit measure corresponding facula area, and the second driving mechanism is according to corresponding facula area band
The irradiance value or radiation power value or signal strength indication of dynamic detector traverse measurement respective distances, and the measurement data is uploaded
To central processing unit；
S3: it repeats step S2 several times, it is strong to obtain no less than three groups of distances and irradiance value or radiation power value or signal
The overall measurement value of angle value；
S4: central processing unit for the overall measurement value of all distance and irradiance value or energy value or radiation power value into
Row fitting, obtains the attenuation factor value of current water body.
Further, communication process of the light beam that the light source issues in water body meets following equation:
Pl=P0e-αl；
Ml=M0e-αl；
Sl=S0e-αl；
Wherein P0For the prompt radiation performance number for the light beam that light source issues, l is distance, PlFor light beam propagation distance l in water
Corresponding radiation power value afterwards, α are attenuation coefficient；M0For the initial irradiance value for the light beam that light source issues, MlIn water for light beam
Corresponding irradiance value after propagation distance l；S0For the initial signal intensity value for the light beam that light source issues, SlLight beam is propagated in water
Corresponding signal strength indication after distance l.
Further, if the parameter information of the hot spot axisymmetricly or central symmetry distribution, second driving mechanism
It drives detector to carry out one-dimensional scanning, and the parameter information of entire hot spot is obtained according to symmetry.
Further, if the parameter information of the hot spot is distributed in non-axis symmetry or non-centrosymmetry, and the length of hot spot and
Width is respectively greater than the length and width of test surface, and second driving mechanism drives detector to carry out two-dimensional scanning and obtains entire hot spot
Parameter information.
It further, further include the measurement data that the central processing unit uploads detector in the step S1 and S2
It is integrated with corresponding facula area, obtains overall measurement value.
The utility model provides a kind of water body optical attenuation coefficient measuring device, including light source, detector and the spy
The first driving mechanism and the second driving mechanism surveyed device connection and drive the detector mobile are set to the detector along optical path
Front and the spot-size detection unit that is connect with the first driving mechanism, and with the detector and spot-size detection list
The central processing unit of member connection, first driving mechanism drive detector to move along optical path, and second driving mechanism drives
The detector carries out motion scan along the plane of vertical optical axis, and the size of the test surface of the detector is less than required detection
The size of hot spot.When the size of hot spot is greater than the size of the test surface of detector, primary detection cannot obtain entire hot spot
Parameter information, therefore pass through and the size that spot-size detection unit detects hot spot first is set, then pass through the second driving mechanism
It drives detector to carry out motion scan according to the area of the hot spot, to obtain the parameter information of entire hot spot, is driven by first
Motivation structure drives detector, the second driving mechanism and spot-size detection unit to move along optical path, and measurement different distance is corresponding
Parameter information data are fitted for obtained multiple groups measurement data, obtain the optical attenuation coefficient value of water body.This is practical new
Type structure is simple, low in cost, easy to use, and effect is reliable, and accuracy is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of water body optical attenuation coefficient measuring device in one specific embodiment of the utility model；
Fig. 2 is the division schematic diagram of hot spot in one specific embodiment of the utility model.
It is as shown in the figure: 10, light source；110, hot spot unit；20, detector；30, the first driving mechanism；40, the second driving machine
Structure；50, spot-size detection unit；60, central processing unit；70, narrow band filter；80, aperture diaphragm.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing:
As shown in Figure 1, the utility model provides a kind of water body optical attenuation coefficient measuring device, including light source 10, spy
The first driving mechanism 30 and the second driving mechanism for surveying device 20, being connect with the detector 20 and driving the detector 20 mobile
40, the spot-size detection unit 50 for being set to the front of the detector 20 along optical path and being connect with the first driving mechanism 30, with
And the central processing unit 60 connecting with the detector 20 and spot-size detection unit 50, first driving mechanism 30 drive
Detector 20 is moved along optical path, and second driving mechanism 40 drives the detector 20 to be moved along the plane of vertical optical axis
Scanning, the size of the test surface of the detector 20 are less than the size of the hot spot of required detection.Specifically, the size when hot spot is big
When the size of the test surface of detector 20, primary detection cannot obtain the parameter information of entire hot spot, therefore pass through setting light
Spot size probe unit 50 detects the area of hot spot first, is then driven by the second driving mechanism 40 according to the size of the hot spot
Detector 20 carries out motion scan, to obtain the parameter information of entire hot spot, it should be noted that guarantees as far as possible in scanning
Search coverage is not intersected, i.e. not duplicate measurements, when the parameter information of hot spot is axisymmetricly distributed or central symmetry is distributed, detection
Device 20 can be only moved one-dimensionally, and measured value is carried out rotational symmetry processing to obtain the parameter information point of entire hot spot
Cloth, conversely, if the parameter information of hot spot is unsatisfactory for axial symmetry or central symmetry distribution, and the length of hot spot and wide respectively greater than detection
When the length and width in face, then detector 20 needs to carry out two-dimensional movement, to obtain the parameter information distribution of entire hot spot, entire light
The parameter information distribution of spot is the distribution of two-dimensional measurement, and the area of the measured value and hot spot is integrated, to obtain pair
Should distance overall measurement value, the certain parameter informations such as radiant power, irradiation level of light beam etc. issued due to light source 10 are in water body
The certain exponential damping law of middle communication satisfaction, therefore above-mentioned one of them parameter information is selected, pass through the first driving mechanism 30
It drives detector 20, spot-size detection unit 50 and the second driving mechanism 40 multiple along optical path synchronizing moving, measures initial ginseng
The number values of information and corresponding parameter information of at least three different distances, thus obtain the vector sum distance of an overall measurement value to
Then overall measurement value is carried out the fitting of exponential function, the optical attenuation coefficient value of current water body can be obtained by amount.In addition, by
It could be set up in above-mentioned formula only for monochromatic light, therefore the light that light source 10 issues need to be monochromatic light, therefore light source 10 is single
Color light source, or narrow band filter 70 is set at 10 rear of light source, to meet monochromatic measuring condition, guarantee measurement essence
Degree.Preferably, central processing unit 60 uses single-chip microcontroller, has the function of storage, calculating, curve matching etc..In the present embodiment, hot spot
Size detection unit 50 is only used for the spot size at measurement different location, can be with so that it is determined that the moving range of detector 20
By way of spectroscope, optical lens and planar array detector or the side that passes through spectroscope, optical lens and linear array detector
Formula realizes estimating for hot spot, and the data of measurement are uploaded to central processing unit 60.
Preferably, the light source is continuous radiant, and the detector 20 is illumination photometer or power meter or single point detector
Or planar array detector, the irradiation level or radiant power or signal strength of the hot spot that probe source 10 issues, since light source 10 issues
Light beam in water body communication satisfaction Pl=P0e-αlOr Ml=M0e-αlOr Sl=S0e-αl；Wherein P0The light beam issued for light source 10
Prompt radiation performance number, l is distance, PlFor corresponding radiation power value after light beam in water propagation distance l, α is decaying system
Number；M0For the initial irradiance value for the light beam that light source 10 issues, MlFor corresponding irradiance value after light beam in water propagation distance l；
S0For the initial signal intensity value for the light beam that light source 10 issues, SlLight beam corresponding signal strength indication after propagation distance l in water；
Therefore above-mentioned any one parameter information is selected, passes through the measurement initial parameter value of information and the corresponding ginseng of at least three different distances
Then measured value is carried out the fitting of exponential function, i.e., to obtain the vector of the vector sum distance an of probe value by number information
Can be obtained the optical attenuation coefficient value of current water body, distance therein can be equidistantly be also possible to it is non-at equal intervals, in order to
It is more accurately fitted the optical attenuation coefficient of water-outlet body, measurement data can be increased, it is corresponding such as to obtain 6 groups of different distances above
Measurement data.
Preferably, the test surface of the detector 20 is rectangular-shaped, which further includes being located at the spy along optical path
The aperture diaphragm 80 in 20 front of device is surveyed, the light hole of the aperture diaphragm 80 is rectangular-shaped.As shown in Fig. 2, in order to preferably protect
It demonstrate,proves detection accuracy and does not repeat to detect, select test surface for the detector 20 of rectangle, while passing through setting aperture diaphragm 80
The shape for making hot spot is also rectangle, so as to which hot spot is divided into multiple hot spot units 110, the size of each hot spot unit with
The size of test surface is consistent, detects a unit every time.If light spot shape is circle, approximate measure can only be carried out, can be existed
Certain error.
The utility model additionally provides the measurement method of above-mentioned water body optical attenuation coefficient measuring device, including following step
It is rapid:
S1: spot-size detection unit 50 measures the initial area for the hot spot that light source issues, 40 basis of the second driving mechanism
The initial area drives the initial parameter information of 20 traverse measurement hot spot of detector, and measurement data is uploaded to central processing unit
60, which is initial irradiance value or prompt radiation performance number or initial signal intensity value；Due to the ruler of hot spot
When the size of the very little test surface greater than detector 20, primary detection cannot obtain the parameter information of entire hot spot, therefore by setting
The area that spot-size detection unit 50 detects hot spot first is set, then by the second driving mechanism 40 according to the area of the hot spot
Drive detector 20 to carry out motion scan, to obtain the parameter information of entire hot spot, when hot spot parameter information axisymmetricly
When distribution or central symmetry are distributed, detector 20 can be only moved one-dimensionally, and obtain the ginseng of entire hot spot using symmetry
Number distribution, conversely, if the parameter information of hot spot is unsatisfactory for axial symmetry or central symmetry distribution, and the length of hot spot and width are respectively greater than
The length and width of test surface, then detector 20 needs to carry out two-dimensional movement, to obtain the parameter distribution of entire hot spot, i.e., two dimension is surveyed
The distribution of magnitude integrates the area of the measured value and hot spot, to obtain the overall measurement value of initial parameter information.
S2: the first driving mechanism 30 drives detector 20,50 edge of the second driving mechanism 40 and spot-size detection unit
Optical path moves a distance, and spot-size detection unit 50 measures corresponding facula area, and the second driving mechanism 40 is according to correspondence
Facula area drive the irradiance value or radiation power value or signal strength indication of 20 traverse measurement respective distances of detector, and will
The measurement data is uploaded to central processing unit；Specifically, can equidistantly be moved or non-equidistant in mobile detector 20
It is mobile.Additionally due to facula area can also change with the propagation of light beam, therefore for each distance need to measure corresponding
Facula area, and integrated the distribution of corresponding two-dimensional measurement and the area by central processing unit 60, it is corresponded to
The overall measurement value of distance.
S3: it repeats step S2 several times, it is strong to obtain no less than three groups of distances and irradiance value or radiation power value or signal
The overall measurement value of angle value.
S4: central processing unit for the overall measurement value of all distance and irradiance value or energy value or radiation power value into
Row fitting, obtains the attenuation factor value of current water body.
Due to light source 10 issue light beam in water body communication satisfaction Pl=P0e-αlOr Ml=M0e-αlOr Sl=S0e-αl；Its
Middle P0For the prompt radiation performance number for the light beam that light source 10 issues, l is distance, PlIt is corresponding after light beam in water propagation distance l
Radiation power value, α are attenuation coefficient；M0For the initial irradiance value for the light beam that light source 10 issues, MlPropagated in water for light beam away from
From irradiance value corresponding after l；S0For the initial signal intensity value for the light beam that light source 10 issues, SlLight beam propagation distance l in water
Corresponding signal strength indication afterwards；Therefore above-mentioned any one parameter information is selected, by the measurement initial parameter value of information and at least
The corresponding parameter information of three different distances, so that the vector of the vector sum distance an of probe value is obtained, then by measured value
The fitting for carrying out exponential function, can be obtained the optical attenuation coefficient value of current water body, distance therein can be equidistantly
Can be equidistant with right and wrong, in order to more accurately be fitted the optical attenuation coefficient of water-outlet body, measurement data can be increased, such as obtained
The corresponding measurement data of 6 groups of different distances above.
In conclusion the utility model provides a kind of water body optical attenuation coefficient measuring device, including light source 10, detection
Device 20, the first driving mechanism 30 and the second driving mechanism for being connect with the detector 20 and driving the detector 20 mobile
40, the spot-size detection unit 50 for being set to the front of the detector 20 along optical path and being connect with the first driving mechanism 30, with
And the central processing unit 60 connecting with the detector 20 and spot-size detection unit 50, first driving mechanism 30 drive
Detector 20 is moved along optical path, and second driving mechanism 40 drives the detector 20 to be moved along the plane of vertical optical axis
Scanning, the size of the test surface of the detector 20 are less than the size of the hot spot of required detection.When the size of hot spot is greater than detection
When the size of the test surface of device 20, primary detection cannot obtain the parameter information of entire hot spot, therefore pass through setting spot size
Probe unit 50 detects the size of hot spot first, then drives detector according to the area of the hot spot by the second driving mechanism 40
20 carry out motion scan, to obtain the parameter information of entire hot spot, drive detector 20, second by the first driving mechanism 30
Driving mechanism 40 and spot-size detection unit 50 are moved along optical path, the corresponding parameter information data of measurement different distance, for
Obtained multiple groups measurement data is fitted, and obtains the optical attenuation coefficient value of water body.The utility model structure is simple, at low cost
Honest and clean, easy to use, effect is reliable, and accuracy is high.
Although the embodiments of the present invention is illustrated in specification, these embodiments are intended only as mentioning
Show, should not limit the protection scope of the utility model.Various omissions are carried out in the range of not departing from the utility model aims, are set
It changes and change should be included in the protection scope of the utility model.
Claims (5)
1. a kind of water body optical attenuation coefficient measuring device, which is characterized in that connect including light source, detector, with the detector
The first driving mechanism and the second driving mechanism for connecing and driving the detector mobile are set to the front of the detector along optical path
And the spot-size detection unit being connect with the first driving mechanism, and connect with the detector and spot-size detection unit
Central processing unit, first driving mechanism drives detector to move along optical path, and second driving mechanism drives the spy
It surveys device and carries out motion scan along the plane of vertical optical axis, the size of the test surface of the detector is less than the hot spot of required detection
Size.
2. water body optical attenuation coefficient measuring device according to claim 1, which is characterized in that the light source is continuous light
Light source, the detector are illumination photometer or power meter or single point detector or planar array detector.
3. water body optical attenuation coefficient measuring device according to claim 1, which is characterized in that the detection of the detector
Face is rectangular-shaped.
4. water body optical attenuation coefficient measuring device according to claim 3, which is characterized in that further include being located at along optical path
Aperture diaphragm in front of the detector, the light hole of the aperture diaphragm are rectangular-shaped.
5. water body optical attenuation coefficient measuring device according to claim 1, which is characterized in that central processing unit is monolithic
Machine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108507956A (en) * | 2018-03-23 | 2018-09-07 | 苏州蛟视智能科技有限公司 | Water body optical attenuation coefficient measuring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507956A (en) * | 2018-03-23 | 2018-09-07 | 苏州蛟视智能科技有限公司 | Water body optical attenuation coefficient measuring device and method |
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