CN205317676U - Test paper reflectometer - Google Patents
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- CN205317676U CN205317676U CN201521113756.3U CN201521113756U CN205317676U CN 205317676 U CN205317676 U CN 205317676U CN 201521113756 U CN201521113756 U CN 201521113756U CN 205317676 U CN205317676 U CN 205317676U
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Abstract
The utility model discloses a test paper reflectometer utilizes the half anti - semitransparent mirror performance at the 45 degrees angles of coaxial light source, obtains the parallel light output of higher illumination uniformity nature for be in test paper on the horizontal objective table and accept the even incident light of vertical direction and shine, set up high resolution grey level camera in the test paper vertical direction simultaneously, note with high resolution grey level camera after making the intensity of reflected light of vertical direction through the light filter like this. Horizontal outgoing through 45 degrees half anti - semitransparent mirrors become with horizontal objective table on the test paper become the vertical direction incident light, the vertically incident light has reduced the influence of the concave -convex structure on test paper surface to scattered light intensity and scattered light angle for maximum illumination is accepted to the color development thing. After the scattered light of vertical direction passed through half anti - semitransparent mirror at the 45 degrees angles and light filter simultaneously, the intensity of the scattered light of a certain wavelength was by the high sensitivity grey level camera record on its upper portion.
Description
Technical field
The utility model belongs to test paper reflection quantitative detection field, in particular to one by the novel small-sized test paper reflectometer of the coaxial light source of LED or similar horizontal homogeneous incident light source, spectral filter and highly sensitive grayscale cameras and gray-scale value and gray areas area measurement fabrication techniques.
Background technology
Changing by means of the color at test paper or other solid surface, comprise the depth of color category and color, carry out the qualitative of unknown composition, detection by quantitative has a long history. Develop at water body, organism, soil, heavy metal contained in the various medium such as air, negatively charged ion, biomacromolecule is such as toxin, hormone etc. and polar molecule, such as agricultural chemicals, the test paper color method for quick of the target component such as sterilant and discarded medicine.
But these methods are mainly used in quantitative and semi-quantitative detection. Sxemiquantitative refers to the concentration being estimated surveyed composition by comparison standard color range-concentration map. Owing to people's eye is different to weight (gray scale) susceptibility of different colours, and identical gray scale is also often recognized difference by different people. On the other hand, target component and developer, major part is organic compound, the binding substances being combined into, the stability of itself and developer by environmental factors, such as temperature, humidity, the factor impacts such as illumination, its color depth not only can change in time, and color itself can change. Therefore different colour developing-Measuring Time, often provides different quantitative results. These factors are just to the very big error quantitatively caused.
Therefore, for overcoming these influence factors, it is necessary to develop a kind of gray-scale value being automatically identified in different colours on test paper or solid surface, and can completing the small-sized test paper reflectometer of gray scale measurement as early as possible, to realize fast, test paper color quantification is measured accurately.
Practical novel content
The purpose of this utility model is to overcome the above problem of prior art existence, it is provided that a kind of test paper reflectometer.
For realizing above-mentioned technical purpose, reaching above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of test paper reflectometer, utilize 45 degree of angle half-reflecting half mirror performances of the coaxial light source of LED, obtain the parallel light output of higher illuminance homogeneity, the even incident light making the test paper being on horizontal Stage microscope accept vertical direction irradiates, high resolving power grayscale cameras is set in test paper vertical direction simultaneously, makes the intensity of reflected light of vertical direction by recording by high resolving power grayscale cameras after spectral filter like this.
The level light sent from the coaxial light source of LED becomes the test paper that vertical incidence is in horizontal Stage microscope by 45 degree of angle half-reflecting half mirrors after reflecting. Vertical incident light decreases the concaveconvex structure on test paper surface to the impact of scattered light intensity and scattered light angle so that colour developing thing accepts maximum illumination. The scattered light of vertical direction is by, after 45 degree of angle half-reflecting half mirrors and spectral filter, the intensity of the scattered light of a certain wavelength is by the grayscale cameras record of the highly sensitive on its top simultaneously. The grayscale cameras gray scale resolving power of highly sensitive is greater than 10 bits. By regulating the focal length of photographic camera, shutter and aperture so that the gray areas on test paper is the most clearly recorded. Therefore by vertical incidence light and the measurement to vertical direction scattered light intensity, substance that show color is accepted the impact that illumination is penetrated by the fine structure that maximum degree eliminates test paper surface, and the maximum degree of scattered light liquid of the vertical direction of acquisition comprises the concentration information of substance that show color. Horizontal Stage microscope is in loading region, it may also be useful to evenly diffusion and the test paper that infiltrates with sample completely, naturally smooth is affixed on glass; Glass is using diffuse coatings as substrate; Object carrying area is overseas, hides with black light-absorbing material.
Test paper reflectometer also comprises control and data handling system, and described control and data handling system are connected to light-source system and data collecting system; Described control and data handling system comprise light on and off control module, light source calibration module, data memory module, and calibration submodule block, measures submodule block, data memory module, display and human-computer interaction module; Described light-source system comprises described horizontal homogeneous incident light source and described spectral filter; Described data collecting system comprises described grayscale cameras, described horizontal Stage microscope and interface module.
A kind of test paper surface measurement method, the image obtained by high resolving power grayscale cameras, through opto-electronic conversion, obtains the unit lattice number of each gray-scale value by the scanning of gridding gray-scale value, by the area of unit lattice on test paper, the area in different gray-scale value region can be calculated. Due to the ununiformity of the quality of test paper, the substance that show color under a certain concentration is uneven in test paper surface arrangement. For the calibration stage determining gray scale-concentration relation, it is necessary to by obtaining the distribution curve of different gray shade unit lattice number, there is the gray-scale value of most multi-cell number, it is exactly the gray-scale value under this concentration. For unknown concentration solution, this just needs all distributed areas of this substance that show color on test paper, its corresponding gray scale and area are measured, thus calculate the amount of this substance that show colors all on test paper, just can be calculated the concentration of this substance solution by following formula:
In above-mentioned formula, CiReferring to the concentration value of a certain gray areas, it calculates from gray scale-concentration relational expression, A0It is after test solution is added on test paper, its maximum area being diffused into. V is that added test solution is to the volume on test paper.
By formula it will be seen that unknown concentration solution is measured by application test paper-reflectometer, what affect concentration calculating is the area of gray scale-concentration relation and corresponding gray areas, and the liquor capacity being loaded on test paper does not affect the calculating of concentration.
The beneficial effects of the utility model are:
1, the utility model adopts the coaxial light source of LED, horizontal exit light is become by 45 degree of half-reflecting half mirrors and becomes vertical direction incident light with test paper on horizontal Stage microscope, vertical incident light decreases the concaveconvex structure on test paper surface to the impact of scattered light intensity and scattered light angle so that colour developing thing accepts maximum illumination. The scattered light of vertical direction is by, after 45 degree of angle half-reflecting half mirrors and spectral filter, the intensity of the scattered light of a certain wavelength is by the highly sensitive grayscale cameras record on its top simultaneously.By regulating the focal length of photographic camera, shutter and aperture so that the gray areas on test paper is the most clearly recorded. Therefore by vertical incidence light and the measurement to vertical direction scattered light intensity, substance that show color is accepted the impact that illumination is penetrated by the fine structure that maximum degree eliminates test paper surface, and the maximum degree of scattered light liquid of the vertical direction of acquisition comprises the concentration information of substance that show color. Such gray scale photograph method, saves the time obtaining test paper surface gray scale information greatly, prevent because of substance that show color and developer in time with the factor such as temperature, humidity, illumination and change the gray scale measuring error caused. Horizontal Stage microscope, in loading region, after infiltrating sample with the test paper of even quality, naturally smooth is affixed on glass; Glass is using diffuse coatings as substrate; Object carrying area is overseas, hides with black light-absorbing material.
2, the utility model adopts fixing part, and structure is simple, and volume is little, and whole instrument, without any moving-member, has very strong environmental adaptation, both may be used for on-the-spot on-line checkingi, it is also possible to use for test in laboratory. Replace the use of spectrophotometer to a certain extent.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technique means of the present utility model, and can be implemented according to the content of specification sheets, below with better embodiment of the present utility model and coordinate accompanying drawing to be described in detail as follows. Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide to of the present utility model it is further understood that the part of formation the application, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model. In the accompanying drawings:
Fig. 1 is test paper reflectometer structural representation;
Fig. 2 is test paper reflectometer Controlling System schematic diagram;
Fig. 3 is an example of the present utility model, Cu2+Gray scale-concentration the graph of a relation (Log average gray) of-PAR solution on test paper.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in detail.
Shown in reference Fig. 1, Fig. 2, first horizontal homogeneous incident light source 1, the parallel light of output level, by the half-reflecting half mirror 2 at 45 degree of angles so that the incident light that the test paper 4 being on horizontal Stage microscope 3 accepts vertical direction irradiates; Grayscale cameras 5 is set in test paper vertical direction so that the intensity of reflected light of vertical direction is by recording by grayscale cameras 5 after half-reflecting half mirror 2.
Wherein also comprising, control and data handling system 6 are connected to light-source system 7 and data collecting system 8; Described control and data handling system 6 comprise light on and off control module 61, light source calibration module 62, data memory module 63, and calibration submodule block 64, measures submodule block 65, display and human-computer interaction module 66; Described light-source system 7 comprises described horizontal homogeneous incident light source 1 and described half-reflecting half mirror 2; Described data collecting system 8 comprises described grayscale cameras 5, and described horizontal Stage microscope 3 and interface module 81, interface module 81 is GiE interface or USB interface.
2nd step, utilize the test paper being loaded with different concns substance solution to accept intensity of reflected light to measure, the image obtained by high resolving power grayscale cameras, through opto-electronic conversion, the unit lattice number of each gray-scale value is obtained by the scanning of gridding gray-scale value, by obtaining the distribution curve of different gray shade unit lattice number, there is the gray-scale value of most multi-cell number, it is exactly the gray-scale value under this concentration. Utilize the gray scale-concentration relation obtained, it is determined that the relationship of both the bests.
3rd step, for the unknown concentration solution of same substance, carries out reflected light gray scale and gray areas areal calculation with after test paper load load solution. By gray scale-concentration relation that the 2nd step is known, concentration is gone out by the gray count measured, calculate the amount of substance in each region at each concentration-region area, the amount of substance in all regions is added and after, just can calculate the concentration of this material by formula (1):
(1)
In above-mentioned formula, CiReferring to the concentration value of a certain gray areas, it calculates from gray scale-concentration relational expression, A0It is after test solution is added on test paper, its maximum area being diffused into. V is that added test solution is to the volume on test paper.
The present embodiment is in cupric ion-PAR solution, is carried out reflected light gray scale-concentration calibration and the measurement of unknown copper solutions concentration by 500nm spectral filter. The Cu of 0,0.1,0.3,0.5,0.7,1.0,1.5,2.0ppm it is respectively by preparing the concentration of cupric ion2+-PAR solution, by respectively to the measurement of load their test paper gray areas of load, the gray scale of acquisition-concentration relation is as shown in Figure 3. Logarithmic value and the corresponding concentration of gray scale have good linear relationship.
It is the copper solutions of 0.80ppm to a concentration, it may also be useful to test paper load this solution of load measures its different gray scales and corresponding gray areas area, is calculated by formula (1) and obtains copper ion concentration in this solution, and calculating the concentration obtained is 0.82ppm, and relative error is 2.5%. The concentration error that known use test paper reflectometer is measured is smaller.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations. All within spirit of the present utility model and principle, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a test paper reflectometer, it is characterised in that: comprising a horizontal homogeneous incident light source, the parallel light of output level, by the half-reflecting half mirror at 45 degree of angles so that the incident light that the test paper being on horizontal Stage microscope accepts vertical direction irradiates; Grayscale cameras is set in test paper vertical direction so that the reflected light of vertical direction is by being recorded by grayscale cameras after spectral filter.
2. test paper reflectometer according to claim 1, it is characterised in that: described horizontal homogeneous incident light source is coaxial light source.
3. test paper reflectometer according to claim 1, it is characterised in that: described grayscale cameras is high gray resolution image photographic camera.
4. test paper reflectometer according to claim 3, it is characterised in that: described grayscale cameras gray scale resolving power is greater than 10 bits.
5. test paper reflectometer according to claim 1, it is characterised in that: described horizontal Stage microscope is in loading region, it may also be useful to evenly diffusion and the test paper that infiltrates with sample completely, naturally smooth is affixed on glass; Described glass is using diffuse coatings as substrate; Object carrying area is overseas, hides with black light-absorbing material.
6. test paper reflectometer according to claim 1, it is characterised in that: also comprising control and data handling system, described control and data handling system are connected to light-source system and data collecting system; Described control and data handling system comprise light source control module, light source calibration module, data memory module, and calibration module, measures module, display and human-computer interaction module;Described light-source system comprises described horizontal homogeneous incident light source and described spectral filter; Described data collecting system comprises described grayscale cameras.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521113756.3U CN205317676U (en) | 2015-12-29 | 2015-12-29 | Test paper reflectometer |
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| CN201521113756.3U CN205317676U (en) | 2015-12-29 | 2015-12-29 | Test paper reflectometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548165A (en) * | 2015-12-29 | 2016-05-04 | 南京洁态环保科技有限公司 | Test paper reflectometer and measuring method for test paper surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548165A (en) * | 2015-12-29 | 2016-05-04 | 南京洁态环保科技有限公司 | Test paper reflectometer and measuring method for test paper surface |
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Denomination of utility model: Test paper reflectometer and measuring method for test paper surface Effective date of registration: 20170412 Granted publication date: 20160615 Pledgee: Bank of Nanjing Jiangbei District branch of Limited by Share Ltd Pledgor: NANJING JIETAI ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Registration number: 2017320000010 |
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Date of cancellation: 20191014 Granted publication date: 20160615 Pledgee: Bank of Nanjing Jiangbei District branch of Limited by Share Ltd Pledgor: NANJING JIETAI ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Registration number: 2017320000010 |
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Effective date of registration: 20210113 Address after: 215000 No.1, Songhe Road, Luzhi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Jiangsu Guoji Juneng Environmental Technology Co.,Ltd. Address before: No. 24-88, Qiaolin Industrial Park, Pukou District, Nanjing City, Jiangsu Province, 210000 Patentee before: NANJING JIETAI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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