CN107014775B - Based on optical water body concentration field measurement method - Google Patents
Based on optical water body concentration field measurement method Download PDFInfo
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- CN107014775B CN107014775B CN201710120000.9A CN201710120000A CN107014775B CN 107014775 B CN107014775 B CN 107014775B CN 201710120000 A CN201710120000 A CN 201710120000A CN 107014775 B CN107014775 B CN 107014775B
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- water body
- side wall
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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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
Abstract
, calibration normal concentration refraction table it the present invention relates to the technical field of water body concentration field measurement method, discloses based on optical water body concentration field measurement method, comprising the following steps: 1)；2), water body to be measured is placed in transparent water tank, the irradiation side wall of water tank is equipped with the flase floor being longitudinally disposed to extend, flase floor is formed with the horizontal grate gap of multiple longitudinal gap arrangement parallel arrangements, forms level shadow plate between adjacent horizontal grate gap；3), the parallel rays irradiation irradiation side wall issued using source of parallel light；The shooting side wall of the water tank is shot using video camera, forms analysis image；4) image procossing, is carried out to analysis image and projection straight line is fitted, it is calculated through the refractive index of the parallel rays in the horizontal grate gap: 5), corresponding to normal concentration refraction table, the layering measurement of corresponding water body concentration is obtained, and then seeks the measurement of entire water body concentration field.
Description
Technical field
The present invention relates to the technical fields of water body concentration field measurement method, more particularly to are surveyed based on optical water body concentration field
Amount method.
Background technique
Research environment pollution problem, people are most concerned with pollutant contaminant density field in the distribution in space, water body
It is the important indicator measured water body and be contaminated degree, alternatively, carrying out hydraulics and Ecology etc. with the method for physical model
When scientific research, the concentration of substance and distribution are most important in measurement water body, and therefore, water body concentration field measurement method becomes current
One of the hot spot of environmentalist's research.
In the prior art, still lack the effective means of measurement water body concentration field, traditional single-point measurement method is then easy shadow
Ring fluidised form, and the measurement of water body concentration field relatively difficult to achieve.
Summary of the invention
The purpose of the present invention is to provide be based on optical water body concentration field measurement method, it is intended to which it is difficult in the prior art to solve
The problem of to realize to water body concentration field measurement method.
The invention is realized in this way being based on optical water body concentration field measurement method, comprising the following steps:
1), calibration normal concentration refraction table；
2), water body to be measured is placed in transparent water tank, the transparent side wall of the one of the water tank forms irradiation side wall, institute
Another transparent side wall for stating water tank forms shooting side wall, is equipped on the irradiation side wall of the water tank and longitudinally extends along the water tank
The flase floor of arrangement, the flase floor are formed with multiple horizontal grate seams along water tank longitudinal gap arrangement parallel arrangement
Gap, and level shadow plate is formed between the adjacent horizontal grate gap；
3) irradiation of the water tank, is irradiated using the parallel rays that source of parallel light issues outside the irradiation side wall of the water tank
Side wall, parallel rays pass through multiple horizontal grate gaps and water body, expose to the shooting side wall of the water tank；Described
Video camera is arranged outside the shooting side wall of water tank, the shooting side wall of the water tank is shot using video camera, forms analysis image；
4) image procossing, is carried out to analysis image and projection straight line is fitted, and is calculated through according to the following formula described
The refractive index of parallel rays in horizontal grate gap:
Wherein, Δ H is the parallel rays through the horizontal grate gap in longitudinal offset, and Width is described
Width；
5), the refractive index calculated according to step 4) corresponds to the normal concentration refraction table in step 1), obtains corresponding water
The layering of bulk concentration measures, and then seeks the measurement of entire water body concentration field.
Further, molten to a variety of normal concentrations by configuring multiple standards strength solution in the step 1)
Liquid carries out concentration refractive index calibration, then carries out curve fitting, and obtains concentration refractive index curve, and then obtains normal concentration refraction
Table.
Further, multiple horizontal light sources are sequentially longitudinally arranged outside the irradiation side wall of the water tank.
Further, multiple horizontal light sources sequentially with multiple positive alignments in horizontal grate gap.
Further, the position for video camera is in the top of the shooting side wall of the water tank, and deviates the water tank outwardly
Shoot side wall arrangement.
Further, in the step 4), to the video camera shooting analysis image carry out image procossing include according to
Analysis image described in ordered pair carries out image denoising, image binaryzation and image Hough transform.
Further, the analysis image after image procossing carries out projection straight line fitting again.
Compared with prior art, water body concentration field measurement method provided by the invention is based on light reaction, by preparatory
Calibration normal concentration refraction table is radiated at multiple horizontal grate gaps of irradiation side wall by the parallel rays at source of parallel light hair
In, multiple parallel rays across horizontal grate gap reflect in passing through water body, and video camera is recycled to shoot directional light
The image that line is formed in shooting side wall forms analysis image, using to analysis image procossing, calculates the refraction of parallel rays
Rate, and then compared using with normal concentration refraction table, obtain the layering concentration of water body, and then available water body concentration field.
Detailed description of the invention
Fig. 1 is the normal concentration refraction example provided in an embodiment of the present invention based on optical water body concentration field measurement method
Constant current journey；
Fig. 2 is the measurement procedure provided in an embodiment of the present invention based on optical water body concentration field measurement method；
Fig. 3 is the simple schematic diagram provided in an embodiment of the present invention based on optical water body concentration field measurement structure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Realization of the invention is described in detail below in conjunction with specific attached drawing.
It is preferred embodiment provided by the invention shown in referring to Fig.1~3.
It is provided in this embodiment to be based on optical water body concentration field measurement method, it is carried out for the concentration field to various water bodys
Measurement, such as can be the water body being pollutant-contaminated, it is also possible to some other water body etc. that predetermined substance is added, not only
It is limited to the water body of certain utilization.
Based on optical water body concentration field measurement method, step specific as follows:
1), shown in referring to Fig.1, calibration normal concentration refraction table；
2), referring to shown in Fig. 3, water body to be measured is placed in transparent water tank 11, the transparent side wall shape of the one of water tank 11
At irradiation side wall, another transparent side wall of water tank 11 forms shooting side wall 111, is equipped on the irradiation side wall of water tank 11 along water tank
11 flase floors being longitudinally disposed to extend, the flase floor are formed with multiple HORIZONTAL PLAIDs along 11 longitudinal gap of water tank arrangement parallel arrangement
Grid gap 113, and level shadow plate 112 is formed between horizontal grate gap 113；Certainly, horizontal grate gap 113 can be for light
Line passes through, and under the blocking of level shadow plate 112, light then cannot pass through level shadow plate 112.
3), referring to shown in Fig. 3, the parallel rays irradiation issued outside the irradiation side wall of water tank 11 using source of parallel light 13 is saturating
The irradiation side wall of bright water tank 11, parallel rays pass through multiple horizontal grate gaps 113 of irradiation side wall, and due to various concentration
Water body is different to the refractive index of light, in this way, the refraction for passing through the light in multiple horizontal grate gaps 113 is then corresponding different；
Video camera 12 is arranged outside the shooting side wall 111 of water tank 11, and the transparent shooting side wall of water tank 11 is shot using video camera 12
111, form analysis image；
4) image procossing, is carried out to analysis image and projection straight line is fitted, and calculates be radiated at water according to the following formula
The refractive index of parallel rays in flat grid gap 113:
Wherein, Δ H is the parallel rays through horizontal grate gap 113 in longitudinal offset, and Width refers to water tank 11
Width；
5), the refractive index calculated according to step 4) corresponds to the normal concentration refraction table in step 1), then available
The layering measurement of corresponding water body concentration, and then the measurement of entire water body concentration field can be sought.
The water body concentration field measurement method of above-mentioned offer is to be reflected based on light reaction by preparatory calibration normal concentration
Table is radiated in multiple horizontal grate gaps 113 of irradiation side wall by the parallel rays at 13 hair of source of parallel light, multiple to pass through
The parallel rays in horizontal grate gap 113 reflects in passing through water body, recycles video camera 12 to shoot parallel rays and is clapping
The image of the formation of side wall 111 is taken the photograph, analysis image is formed, using to analysis image procossing, calculates the refractive index of parallel rays, into
And utilize and compared with normal concentration refraction table, obtain the layering concentration of water body, and then available water body concentration field.
In above-mentioned steps 1) in, by configuring multiple standards strength solution, concentration folding is carried out to various normal concentration solution
Rate calibration is penetrated, then is carried out curve fitting, concentration refractive index curve is obtained, and then obtains normal concentration refraction table.
In step 2), according to actual needs, horizontal grate gap 113 and level shadow plate 112 can be suitably adjusted
Width, and then for actual needs measurement water body needs, carry out water body measurement of concetration.Under normal circumstances, it can choose 1mm
The level shadow plate 112 in wide horizontal grate gap 113 and 5mm, it is therefore an objective to make parallel rays from horizontal grate gap 113
It passes through, and is not passed through level shadow plate 112.
In step 3), using multiple sequentially longitudinally arranged sources of parallel light 13, area source is formed, area source sending is in
Longitudinally arranged parallel rays, and then may be implemented to correspond to each horizontal grate gap 113, there is parallel rays to pass through.
Specifically, multiple sources of parallel light 13 sequentially with the positive alignment in multiple horizontal grate gaps 113, in this way, guaranteeing flat
Row light can accurately pass through horizontal grate gap 113.
In addition, can then pass through multiple water tanks when needing the water body to flowing and relatively long distance to carry out measurement of concetration
The mode of 11 sequentially lateral connections.
In step 3), video camera 12 is in the top of the shooting side wall 111 of water tank 11, and deviates the bat of water tank 11 outwardly
Side wall 111 is taken the photograph, in this way, video camera 12 is downwardly inclined the shooting side wall 111 of shooting water tank 11.
In the present embodiment, in step 4), it includes sequentially right for carrying out image procossing to the analysis image that video camera 12 is shot
Analyze image and carry out image denoising, image binaryzation and image Hough transform, the analysis image after image procossing again into
The fitting of row projection straight line.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. being based on optical water body concentration field measurement method, which comprises the following steps:
1), calibration normal concentration refraction table；
2), water body to be measured is placed in transparent water tank, the transparent side wall of the one of the water tank forms irradiation side wall, the water
Another transparent side wall of case forms shooting side wall, is equipped on the irradiation side wall of the water tank and is longitudinally disposed to extend along the water tank
Flase floor, the flase floor be formed with it is multiple along the water tank longitudinal gap arrangement parallel arrangement horizontal grate gaps, and
Level shadow plate is formed between the adjacent horizontal grate gap；
3) the irradiation side of the water tank, is irradiated using the parallel rays that source of parallel light issues outside the irradiation side wall of the water tank
Wall, parallel rays pass through multiple horizontal grate gaps and water body, expose to the shooting side wall of the water tank；In the water
Video camera is arranged outside the shooting side wall of case, the shooting side wall of the water tank is shot using video camera, forms analysis image；
4) image procossing, is carried out to analysis image and projection straight line is fitted, and is calculated through the level according to the following formula
The refractive index of parallel rays in grid gap:
Wherein, Δ H is the parallel rays through the horizontal grate gap in longitudinal offset, and Width is the water tank
Width；
5), the refractive index calculated according to step 4) corresponds to the normal concentration refraction table in step 1), and it is dense to obtain corresponding water body
The layering of degree measures, and then seeks the measurement of entire water body concentration field.
2. being based on optical water body concentration field measurement method as described in claim 1, which is characterized in that in the step 1)
In, by configuring multiple standards strength solution, concentration refractive index calibration, then march are carried out to a variety of normal concentration solution
Line fitting, obtains concentration refractive index curve, and then obtain normal concentration refraction table.
3. being based on optical water body concentration field measurement method as described in claim 1, which is characterized in that in the photograph of the water tank
It penetrates outside side wall and is sequentially longitudinally arranged multiple horizontal light sources.
4. being based on optical water body concentration field measurement method as claimed in claim 3, which is characterized in that multiple horizon lights
Source sequentially with multiple positive alignments in horizontal grate gap.
5. as described in claim 1 be based on optical water body concentration field measurement method, which is characterized in that the position for video camera in
The top of the shooting side wall of the water tank, and deviate the shooting side wall arrangement of the water tank outwardly.
6. being based on optical water body concentration field measurement method as described in any one of claim 1 to 5, which is characterized in that in institute
It states in step 4), carrying out image procossing to the analysis image of video camera shooting includes sequentially carrying out figure to the analysis image
As denoising, image binaryzation and image Hough transform.
7. being based on optical water body concentration field measurement method as claimed in claim 6, which is characterized in that after image procossing
Analysis image carry out projection straight line fitting again.
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Citations (6)
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| CN2551992Y (en) * | 2002-06-14 | 2003-05-21 | 清华大学 | Brine concentration measurer |
| CN102507136A (en) * | 2011-10-19 | 2012-06-20 | 河海大学 | Riparian zone simulating and monitoring system |
| CN102519927A (en) * | 2011-12-09 | 2012-06-27 | 中国水利水电科学研究院 | Multichannel fluorescence test system and method of water concentration field |
| CN202533370U (en) * | 2012-02-29 | 2012-11-14 | 中国矿业大学(北京) | Emulsion concentration measurement device |
| US8831700B2 (en) * | 2006-03-17 | 2014-09-09 | Glt Acquisition Corp. | Apparatus and method for creating a stable optical interface |
| CN205691515U (en) * | 2016-06-07 | 2016-11-16 | 上海海洋大学 | Experimental trough contaminant density field test device |
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2017
- 2017-03-02 CN CN201710120000.9A patent/CN107014775B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2551992Y (en) * | 2002-06-14 | 2003-05-21 | 清华大学 | Brine concentration measurer |
| US8831700B2 (en) * | 2006-03-17 | 2014-09-09 | Glt Acquisition Corp. | Apparatus and method for creating a stable optical interface |
| CN102507136A (en) * | 2011-10-19 | 2012-06-20 | 河海大学 | Riparian zone simulating and monitoring system |
| CN102519927A (en) * | 2011-12-09 | 2012-06-27 | 中国水利水电科学研究院 | Multichannel fluorescence test system and method of water concentration field |
| CN202533370U (en) * | 2012-02-29 | 2012-11-14 | 中国矿业大学(北京) | Emulsion concentration measurement device |
| CN205691515U (en) * | 2016-06-07 | 2016-11-16 | 上海海洋大学 | Experimental trough contaminant density field test device |
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Inventor after: Chen Jun Inventor after: Chen Ruozhou Inventor after: Lin Jun Inventor after: Wang Lei Inventor after: Xing Fangliang Inventor after: Luo Chaolin Inventor after: Qiu Jinwei Inventor after: Wang Tianyi Inventor after: Guo Zebin Inventor before: Luo Chaolin Inventor before: Lin Jun Inventor before: Chen Ruozhou |
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