CN205404390U - Device that developments control solution strength changes - Google Patents
Device that developments control solution strength changes Download PDFInfo
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- CN205404390U CN205404390U CN201620153713.6U CN201620153713U CN205404390U CN 205404390 U CN205404390 U CN 205404390U CN 201620153713 U CN201620153713 U CN 201620153713U CN 205404390 U CN205404390 U CN 205404390U
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Abstract
The utility model discloses a device that developments control solution strength changes, the device include light source, solution tank, screen, camera, computer and optical bench, light source, solution tank, camera and screen are fixed in proper order on the optical bench, the height of light source and solution tank and screen highly uniform, the camera is placed facing to the screen to with the computer link, light source, solution tank, screen and camera are located in the camera bellows, the solution tank is non -light tight solution tank. The utility model provides a device that developments control solution strength changes can shoot to the light that passes behind the solution to change the RGB image into gray value, the change real -time supervision solution strength through the gray value changes, can be used to the experiment teaching with to in the not high industrial and agricultural production of required precision, economically feasible. The utility model provides a method that developments control solution strength changes is simple and easy feasible, can be used for the real -time supervision solution strength to change, and the exactness is high.
Description
Technical field
This utility model relates to analyzing detection equipment, is specifically related to the device of a kind of dynamic monitoring solution concentration change.
Background technology
The method of current widely used mensuration solution concentration is spectrophotography.Spectrophotography is by measuring the absorbance of measured matter light in certain wave strong point or a wavelength range or luminous intensity, the method that this material is carried out qualitative and quantitative analysis.By the measurement to concentration known solution absorbance, obtain the relation curve between solution concentration and absorbance, utilize Beer-Lambert law can record the concentration of solution.Spectrophotography not only precision is high, repeatability is better, and simple and efficient to handle.
But, the spectrophotometer that spectrophotography uses is a kind of precision instrument, and it is comparatively strict with the requirement of operational approach to working environment, operator requires height, and price is costly.Spectrophotometer can not detect solution concentration in real time simultaneously.
And portable chlorine dioxide solution concentration determinator device although have can the concentration of monitor in real time chlorine dioxide, and equipment is simplified, employing battery is powered, request the dependence to alternating current, without adding the advantages such as other reagent in the sample, but it uses scope less, can only be used for measuring ClO 2 solution concentration.Its purposes has significant limitation.
Therefore a kind of equipment of exploitation is simplified, concentration determining instrument easy and simple to handle, of many uses, it is possible to monitor in real time, cheap, it is provided that to school instruction, industrial and agricultural production etc. uses and just seems very necessary.
Summary of the invention
In order to solve the problems referred to above, the purpose of this utility model is in that to provide the device of a kind of dynamic monitoring solution concentration change, light after solution can be taken pictures by this device, and RGB image is changed into gray value, solution concentration change is monitored in real time by the change of gray value, can be used for experimental teaching with in the not high industrial and agricultural production of required precision, economically feasible.
Above-mentioned purpose is achieved by the following technical solution:
The device of a kind of dynamic monitoring solution concentration change, including light source, solution tank, optical screen, photographic head, computer and optical bench；Described light source, solution tank, photographic head and optical screen are sequentially fixed on described optical bench, and the height of light source is highly consistent with solution tank and optical screen；Described photographic head is placed facing to optical screen, and is connected with computer；Described light source, solution tank, optical screen and photographic head are located in camera bellows；Described solution tank is the solution tank of printing opacity.
Further, described light source is lasing light emitter.
Further, described solution tank is quartz material.
Further, described light source, solution tank, photographic head and optical screen are removably fixed on described optical bench successively.
Further, described solution is absorbing fluid.
A kind of method utilizing above-mentioned device dynamically to monitor solution concentration change, comprises the steps:
Step S1, opens light source, photographic head and computer；
Step S2, computer controls photographic head aiming screen and takes pictures, and converts, according to equation below (1), the RGB image obtained of taking pictures to gray value, is denoted as the gray value L before being not added with solution to be monitored0；
L=0.2989 × R+0.5870 × G+0.1140 × B (1)
Step S3, adds in solution tank by solution to be monitored, and the liquid level of solution to be monitored, higher than the height of light source traverse solution tank, records solution concentration initial value C to be monitored0；
Step S4, computer controls photographic head aiming screen and takes pictures, and converts, according to formula (1), the RGB image obtained of taking pictures to gray value, it is thus achieved that add the initial gray value L after solution to be monitored1；When the concentration change of the solution to be monitored in solution tank is to the T moment, computer controls photographic head aiming screen and takes pictures, and converts, according to formula (1), the RGB image obtained of taking pictures to gray value, it is thus achieved that the gray value L in T momentT；
Step S5, calculates the concentration C of T moment solution to be monitored according to equation below (2)T。
Further, described solution to be monitored is absorbing fluid.
The beneficial effects of the utility model:
Light after solution can be taken pictures by the device of the dynamically monitoring solution concentration change that this utility model provides, and RGB image is changed into gray value, solution concentration change is monitored in real time by the change of gray value, can be used for experimental teaching with in the not high industrial and agricultural production of required precision, economically feasible；In practical application, it is possible to monitor or occur for detecting chemical substance degraded in solution etc. the situation of concentration change for the concentration change in industrial two kinds of liquid mixing processes.
Accompanying drawing explanation
Fig. 1 is the device of the dynamically monitoring solution concentration change that this utility model provides；
Fig. 2 is that laser passes through the graph of a relation of gray value and concentration after lemon yellow solution.
Detailed description of the invention
The technical solution of the utility model is described in detail below in conjunction with the drawings and specific embodiments.
The device of a kind of dynamic monitoring solution concentration change as shown in Figure 1, including light source 1, solution tank 3, optical screen 5, photographic head 4, computer 7 and optical bench 2；Described light source 1, solution tank 3, photographic head 4 and optical screen 5 are sequentially fixed on described optical bench 2, and the height of light source 1 is highly consistent with solution tank 3 and optical screen 5；Described photographic head 4 is placed facing to optical screen 5, and is connected with computer 7；Described light source 1, solution tank 3, optical screen 5 and photographic head 4 are located in camera bellows 6.Described solution tank 3 is the solution tank of printing opacity.
In order to improve the non-scatter of light source, described light source 1 is lasing light emitter.
In order to improve mechanical strength and the translucent effect of solution tank, described solution tank 3 is quartz material.
For the ease of adjusting light source 1, solution tank 3, distance between photographic head 4 and optical screen 5, described light source 1, solution tank 3, photographic head 4 and optical screen 5 are removably fixed on described optical bench 2 successively.
Said apparatus is applicable to the concentration measurement and control of absorbing fluid.
A kind of method utilizing above-mentioned device dynamically to monitor solution concentration change, comprises the steps:
Step S1, opens light source, photographic head and computer；
Step S2, computer controls photographic head aiming screen and takes pictures, and converts, according to equation below (1), the RGB image obtained of taking pictures to gray value, is denoted as the gray value L before being not added with solution to be monitored0；
L=0.2989 × R+0.5870 × G+0.1140 × B (1)
Step S3, adds in solution tank by solution to be monitored, and the liquid level of solution to be monitored, higher than the height of light source traverse solution tank, records solution concentration initial value C to be monitored0；
Step S4, computer controls photographic head aiming screen and takes pictures, and converts, according to formula (1), the RGB image obtained of taking pictures to gray value, it is thus achieved that add the initial gray value L after solution to be monitored1；When the concentration change of the solution to be monitored in solution tank is to the T moment, computer controls photographic head aiming screen and takes pictures, and converts, according to formula (1), the RGB image obtained of taking pictures to gray value, it is thus achieved that the gray value L in T momentT；
Step S5, calculates the concentration C of T moment solution to be monitored according to equation below (2)T。
Said method is applicable to the concentration measurement and control of absorbing fluid.
The party's ratio juris is as follows:
1, Beer-Lambert law
According to Beer-Lambert law, when a branch of collimated monochromatic ligth is by uniform absorbing fluid, solution is proportional with the concentration c of the light path d of light process in the solution and solution to the absorbance A of light, and formula is:
A=k*c*d
K is the ratio absorptance of light, is a constant.As long as measuring light path d and certain moment absorbance A, it is possible to obtain concentration c.
2, image procossing RGB tri-stimulus
2.1RGB pattern
International Commission on Illumination (CIE) specifies 700nm (red R ed), 546.1nm (green Green), and three coloured light of 435.8nm (blue Blue) are three primary colours, are also called physics three primary colours (RGB).RGB pattern is also known as RGB color space.It is a kind of additive process pattern, by the amount of radiation of R, G, B, arbitrary color can be depicted.During computer definition color, the span of tri-kinds of compositions of R, G, B is 0-255, and 0 represents do not have quantity of stimulus, and 255 represent that quantity of stimulus reaches maximum.Just having synthesized white light when R, G, B are 255, R, G, B are the formation of black when being 0, will obtain different " C, M, Y " colors when dichromatism superposition respectively.Total total 255*255*255 kind color.
2.2RGB image
One width RGB image is exactly the array of the colour element of M × N × 3 size, and each color pixel cell therein is at three components of the red, green, blue corresponding to the coloured image of particular spatial location.RGB image can also regard " storehouse " that formed by three gray level images as, when being sent to the red, green, blue input of color video monitor, just produces coloured image on screen.
By convention, the three width images forming a width RGB color image are commonly referred to as red, green, blue component image.The data class of component image determines their span.If the data class of a width RGB image is double, then span is exactly [0,1].Similar, for the RGB image of uint8 class or uint16 class, span is [0,255] or [0,65535] respectively.It is used for representing that the bit number of these component image pixel values determines the bit-depth of a width RGB image.
2.3RGB image gray levels is changed
Utilize software to read a coloured image being made up of m × n pixel and can set up the three-dimensional array of corresponding m × n × 3.In this array, front bidimensional represents that pixel is arranged in the position of image, and the third dimension is the red, green, blue color intensity value of each pixel in image.The intensity of red, green, blue these three color can with the numeric representation between 0～1.Three kinds of color intensity components such as some pixel are (0,0,0), then this pixel is shown as black；The pixel that color intensity component is (1,1,1) is shown as white.The RGB strength component of each pixel is stored in the third dimension element of array.Extract and give, by the color component value of each pixel, the color intensity that certain weight calculation obtains this pixel:
L=0.2989*R+0.5870*G+0.1140*B
3, dynamically monitor
A branch of directional light passes through absorbing fluid, shoot with lighting device, the frequency furnishing 1s of shooting, the picture of shooting is passed to computer, the gray value of whole pictures is gone out by computed in software, after every pictures is processed, it is possible to obtain every 1s light by the gray value after solution, replace light by the intensity of light after solution with picture gray value.
Therefore, said apparatus may be used for the concentration of absorbing fluid and measures, and so-called absorbing fluid refers to the solution of the luminous energy (or laser send luminous energy) that can absorb light source and send.
The application effect of the method and accuracy are determined as follows:
Solution is chosen and preparation
We are example with lemon yellow, measure the relation of its absorbance and solution concentration, are respectively configured the lemon yellow solution of 4g/L, 8g/L, 12g/L, 16g/L, four kind of concentration.
Measure the setting of part
Choosing an equal amount of five cuvettes as solution tank, four are used for loading onto the solution stating four kinds of concentration, and another one is not added with the blank of solution.The solution prepared is separately added in the middle of cuvette, allows laser beat on screen respectively through cuvette, to ensure when measuring five absorbances that cuvette is constant with the distance of lasing light emitter, but distance size is not limit.The distance of cuvette and screen is not limit, and facilitates photographic head to take pictures.
Luminous point is taken pictures
First allow laser pass through not add the cuvette of solution, the luminous point on screen is taken pictures.Next process other four groups of solution, respectively to laser by after luminous point take pictures.
Absorbance calculates.Calculate the light intensity value of five shooting photos, obtain five pictures gray value sizes with image processing software:
The gray value of variable concentrations solution and the relation of concentration are shown in Fig. 2.
We can it is seen from figure 2 that, along with the increase of lemon yellow solution concentration, by the gray value meeting linear reduction after solution, namely absorbance is with concentration linear change.We simulate the linear equation by the gray value of luminous point after solution Yu solution concentration.
As long as next the gray value of every photo being updated to equation, it is possible to obtain the concentration value of solution.If at any time luminous point is taken pictures by photographic head, and by incoming for picture computer disposal, solution concentration just can momentarily be reflected.
Dynamic dilution determination test:
First we prepared the lemon yellow solution that concentration is 16g/L, before adding solution tank to, first measures the gray value L before being not added with solution0；It is then added in solution tank, initial gray value L after mensuration interpolation solution1；Constantly adding water inside to dilute its concentration again, the speed added water is 200ml/min, took pictures every two minutes and converts gray value to, it is thus achieved that the gray value L in T momentT, it is calculated as follows solution concentration, obtains the dynamic concentration of different time in dilution,
The difference of last comparison solution concentration value of calculation and actual value, result is as follows:
| Moment | 2min | 4min | 6min | 8min | 10min |
| Actual value | 11.43g/L | 8.89g/L | 7.27g/L | 6.15g/L | 5.33g/L |
| Value of calculation | 11.28g/L | 8.76g/L | 7.10g/L | 5.93g/L | 5.06g/L |
| Error | 1.3% | 1.4% | 1.3% | 2.5% | 4.1% |
It is shown that use the error between solution concentration value and the actual value of the device mensuration of this utility model offer within 5%, can accepting completely, economically feasible in experimental teaching with the industrial and agricultural production that required precision is not high, accuracy is high.The effect of above-described embodiment indicates that essentiality content of the present utility model, but does not limit protection domain of the present utility model with this.
Claims (5)
1. the device of a dynamic monitoring solution concentration change, it is characterised in that: include light source, solution tank, optical screen, photographic head, computer and optical bench；Described light source, solution tank, photographic head and optical screen are sequentially fixed on described optical bench, and the height of light source is highly consistent with solution tank and optical screen；Described photographic head is placed facing to optical screen, and is connected with computer；Described light source, solution tank, optical screen and photographic head are located in camera bellows；Described solution tank is the solution tank of printing opacity.
2. the device of dynamic monitoring solution concentration according to claim 1 change, it is characterised in that: described light source is lasing light emitter.
3. the device of dynamic monitoring solution concentration according to claim 1 change, it is characterised in that: described solution tank is quartz material.
4. the device of dynamic monitoring solution concentration according to claim 1 change, it is characterised in that: described light source, solution tank, photographic head and optical screen are removably fixed on described optical bench successively.
5. the device according to the arbitrary described dynamically monitoring solution concentration change of Claims 1 to 4, it is characterised in that: described solution is absorbing fluid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620153713.6U CN205404390U (en) | 2016-02-29 | 2016-02-29 | Device that developments control solution strength changes |
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| CN201620153713.6U CN205404390U (en) | 2016-02-29 | 2016-02-29 | Device that developments control solution strength changes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764946A (en) * | 2017-10-26 | 2018-03-06 | 芜湖市纯至网络科技有限公司 | A kind of solution concentration change detecting device |
| CN108387542A (en) * | 2018-05-24 | 2018-08-10 | 清华大学 | Fluorine ion colorimetric sensor and its application in a kind of water based on smart mobile phone |
-
2016
- 2016-02-29 CN CN201620153713.6U patent/CN205404390U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764946A (en) * | 2017-10-26 | 2018-03-06 | 芜湖市纯至网络科技有限公司 | A kind of solution concentration change detecting device |
| CN108387542A (en) * | 2018-05-24 | 2018-08-10 | 清华大学 | Fluorine ion colorimetric sensor and its application in a kind of water based on smart mobile phone |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20180229 |