CN107643266A - A kind of solution concentration changes real-time detecting system - Google Patents
A kind of solution concentration changes real-time detecting system Download PDFInfo
- Publication number
- CN107643266A CN107643266A CN201610573538.0A CN201610573538A CN107643266A CN 107643266 A CN107643266 A CN 107643266A CN 201610573538 A CN201610573538 A CN 201610573538A CN 107643266 A CN107643266 A CN 107643266A
- Authority
- CN
- China
- Prior art keywords
- solution
- concentration
- change
- solution concentration
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A kind of solution concentration change real-time detecting system is invented, the two-dimentional concentration distribution for real-time dynamic monitoring solution changes.Solution variations in refractive index is detected using Mach-Zehnder interferometers, with CCD on-the-spot record interference fringes, finally handles interference fringe video image in real time with DSP to obtain solution concentration change.Experiment test shows that the system can carry out Real_time quantitative detection to single solute solution change in concentration；Under the conditions of more solutes, by analyzing the change of major solute concentration, the change in concentration of energy quantitative estimation major solute.Using H of the iron in concentration as 0.5mol/L2SO4In solution, sweep speed 2mVS‑1Potentiodynamic polarization experiment exemplified by, when the current potential for measuring anode activation area is 0.428V, FeSO at Cathode/Solution Interface4Peak concentration be (9.2 ± 0.2) × 10‑3Mol/L.Test result indicates that the system accuracy is higher, stability is good, solution concentration can be changed and carry out real-time online detection.
Description
Art
The present invention relates to a kind of detecting system, more particularly to a kind of solution concentration change real-time detecting system.
Background technology
The measurement of solution refractive index and concentration is that the fields such as biomedicine, materialogy, chemistry, engineering technology are extremely paid close attention to
Research topic.In biomedical sector, the optical imagery of biological tissue is always the hot issue of researcher's concern.In recent years
Come, active somatic cell, the active somatic cell of reproducing are observed by improving digital micro-holography by domestic and international multiple research groups
The dynamic change of the substantially cell tissue index distribution of image.In crystalline material preparation process, plane of crystal concentration point
The monitoring of cloth change is to prepare one of key technology of high quality crystal.Shandong University's crystal researcher done using laser
The solution concentration change in technology observation crystal generating process is related to, required crystal material is prepared by controlling solution concentration
Material.In chemical field, Knox etc. early in just once anti-using holographic interference technique observation chemistry in initial several years that laser is born
The change of solution concentration in answering.Recently, laser interferometry is applied to the mutually dense of solid/liquid interfaces solution by German researcher
Spend the measure of gradient and the research of the electrochemical hydrodynamics under magnetic fields.In metal erosion research, observation corrosion
During Cathode/Solution Interface solution refractive index and concentration dynamic change and thickness of diffusion layer change to analyze corrosion of metal
Mechanism has important meaning.Therefore, the detection of solution refractive index and concentration not only has important scientific meaning, but also has
It is widely applied prospect.
Optical test method provides abundant technological means for the detection of solution concentration.Tsing-Hua University Li Wen rivers etc. propose
With the profile of details in a play not acted out on stage, but told through dialogues schlieren method observation solution concentration, the qualitative observation to concentration distribution in transparency material is realized.Manage in Wuhan
Work university Jiang Desheng etc. and Xi'an University of Technology's Yang Xiu virtues etc. devise strength of fluid detection using Fabry-Perot interferometer
System, the former realizes a wide range of, the high-acruracy survey of clear solution concentration by testing the centre wavelength of solution transmitted spectrum；
The latter obtains the variable quantity of strength of fluid by the variable quantity of computer discriminant interference fringe level in real time.Chongqing University of Technology
Zhao Mingfu etc. is designed using optical fiber total reflection method and is improved the sensor of energy on-line measurement biomass concentration, is established a kind of new
Biomass concentration measuring method.Institutes Of Technology Of Nanjing Wu Bin etc. determines the dense of ethanol water using LR laser raman frequency displacement
Degree, and obtain very high precision.These optical detective technologies based on different principle can realize that solution is dense under specified conditions
The nondestructive measurement of degree, corresponding system for solution concentration measurement have important actual application value.For detecting electrode/solution circle
The changes in distribution of face two dimension concentration, this seminar is it is proposed that a kind of new carrier wave interference method, to facilitate acquisition solution concentration
Phase place change before Object light wave caused by change.But this method is based on still image treatment technology, can not realize and solution concentration is moved
The real-time online measuring of state change.
The content of the invention
The purpose of the present invention is to monitor the dynamic change of solution concentration Two dimensional Distribution in real time, devising a kind of solution concentration
Change real-time detecting system.
The technical solution adopted for the present invention to solve the technical problems is：
Solution concentration change real-time detecting system is mainly including the light path system based on M-Z interferometers, using DM642 as core
Video signal processing system two parts composition of the heart.By the information of M-Z interferometers detection solution concentration change, completed by CCD
Opto-electronic conversion, the DM642 chips of the suitable Video processing of data signal feeding are converted the electrical signal to using high-speed AD converter
Analysis calculating is carried out, is finally exported and shown in the form of vision signal.
Light path system based on described M-Z interferometers is by wavelength for caused by 632.8 nm He-Ne lasers
Laser is divided into two beams, and a branch of solution sample to be measured passed through in electrolytic cell forms object light, another Shu Zuowei reference lights.Two-beam passes through
Prism is superimposed to form interference fringe.The change of solution concentration causes the change of solution refractive index and the change of object light phase in electrolytic cell
Change, the expansion, contraction and distortion of interference fringe are shown as in interference pattern.
The hardware platform of described video signal processing system closes many Seed-Vpm642 up to company's production using Beijing,
Its kernel processor chip is the DM642 digital signal processors of American TI Company production.
The CCD of described video signal processing system collects RGB component signal, turns by Video Decoder TVP5150
It is changed to YCbCr (4：2：2 forms) signal, sample frequency 25frame/s.
DM642 video input and output interface VPlA is arranged to video input 121 in described system, and VPOA is output
Mouthful.After DM642 calculation process, the BT.656 digital video data streams of outputting standard 8, after SAA7121H Video codings
Obtain the PAL-system composite video CVBS signals for being adapted to screen display.
The beneficial effects of the invention are as follows：
Solution concentration change real-time detecting system can dynamically observe the change procedure of solution concentration in real time, and measurement accuracy is about
0.2mmol/L；New experimental facilities is provided for the research of electrode process, the software and hardware for further improving system is expected to open up
Its application is opened up, hardware guarantee is provided for researchs such as heat and mass, fluid diffusions.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is Mach-Zender interferometer.
Fig. 2 is DSP video signal processing systems.
Fig. 3 is video processnig algorithms flow.
Embodiment
Solution concentration change real-time detecting system is mainly including the light path system based on M-Z interferometers, with DM642
Formed for video signal processing system two parts of core.By the information of M-Z interferometers detection solution concentration change, pass through CCD
Opto-electronic conversion is completed, the DM642 of the suitable Video processing of data signal feeding is converted the electrical signal to using high-speed AD converter
Chip carries out analysis calculating, is finally exported and shown in the form of vision signal.
As shown in figure 1, wavelength is divided into two beams for laser caused by 632. nm He-Ne lasers, it is a branch of through electrolysis
Solution sample to be measured in pond forms object light, another Shu Zuowei reference lights.Two-beam is superimposed to form interference fringe through prism.Electrolysis
The change of solution concentration causes the change of solution refractive index and the change of object light phase in pond, shows as interfering bar in interference pattern
Expansion, contraction and the distortion of line.Before generation electrochemical reaction, the concentration of solution is homogeneous, and interference fringe interval is uniform；Reaction
Afterwards, the solution concentration and refraction index changing of Cathode/Solution Interface, causes the change of object light light path and Wave-front phase, interface
Interference fringe deforms upon.In course of reaction, any instant solution can be with phase in the change in concentration information of any position
The form of position change is stored into interference fringe.Recorded by CCD, recycle DM642 to calculate the phase distribution of interference fringe,
And then obtain the change profile of solution concentration.The frame per second that CCD is set in system as 25frame/s, image resolution ratio be 720 ×
576。
As shown in Fig. 2 the hardware platform of video signal processing system using Beijing close many Seed up to company's production-
Vpm642, its kernel processor chip are the DM642 digital signal processors of American TI Company production.The RGB component that CCD is collected
Signal, YCbCr (4 is converted to by Video Decoder TVP5150：2：2 forms) signal, sample frequency 25frame/s.System
Middle DM642 video input and output interface VPlA is arranged to video input 121, and VPOA is delivery outlet.Through DM642 calculation process
Afterwards, the BT.656 digital video data streams of outputting standard 8, obtain being adapted to screen display after SAA7121H Video codings
PAL-system composite video CVBS signals.Asked in experiment, during the hysteresis shown from CCD start recordings to the first frame result less than 1.0S.
As shown in figure 3, during the solution phase of interference fringe, in order to which effective suppression system noise is smart to ensure to measure
Degree, what is actually calculated is not the phase distribution of single frames interference pattern, but the phase distribution between interference pattern at different moments of two frames.
Using the interference pattern for reacting initial time as start frame, the phase difference value calculated every time is the phase difference of two continuous frames interference pattern
Cloth, result of calculation are superimposed with the phase difference of previous moment.Therefore, the phase distribution that any instant obtains is moment interference
The phase distribution of figure and initial time interference pattern, so as to ensure that the change in concentration finally calculated is relative to reaction initial time
Concentration difference.By the interference image gathered has been introduced into carrier fringe, therefore it can easily utilize Fourier analysis
Method handles interference fringe image.Object light phase difference and solution refraction index changing amount proportional, by the phase of any instant
The change of etching solution refractive index when potential difference can calculate this, solution is determined further according to the corresponding relation of solution refractive index and concentration
The variable quantity of concentration.In general, the knots modification of solution refractive index linearly closes with its change in concentration amount under isothermal condition
System.When electrolyte is single solute, the accurate corresponding relation of solution concentration and refractive index can be obtained, so as to accurate measurement
The change in concentration of solution；When electrolyte includes different kinds of ions composition, although multicomponent change and pair of refractive index can not be obtained
It should be related to, but main solution composition change can be first determined according to course of reaction, then obtain the composition transfer and refractive index
Corresponding relation.During result is shown, solvent portions represent change in concentration amount (i.e. with the gray level image of different grey-scale
The difference of solution concentration and initial electrolysis liquid concentration in course of reaction).When concentration is constant, the gray level of correspondence image is intermediate value
128, appear dimmed；Concentration increase, image gray levels enhancing, value added is bigger, and brightness is higher；Concentration is reduced, gradation of image
Level weakens, and decrement is bigger, and image is darker；The part of counter electrode is then set as intermediate value 128 all the time, appears dimmed.Solution
The change of concentration is intuitively shown eventually through gray level image.
Claims (5)
1. a kind of solution concentration changes real-time detecting system, the main light path system included based on M-Z interferometers, with
DM642 is that video signal processing system two parts of core form；By the information of M-Z interferometers detection solution concentration change, lead to
Cross CCD and complete opto-electronic conversion, converting the electrical signal to data signal using high-speed AD converter is sent into suitable Video processing
DM642 chips carry out analysis calculating, are finally exported and shown in the form of vision signal.
2. solution concentration according to claim 1 changes real-time detecting system, it is characterized in that described M-Z interferometers are
Wavelength is divided into two beams by the light path system on basis for laser caused by 632.8 nm He-Ne lasers, a branch of to pass through electrolytic cell
In solution sample to be measured formed object light, another Shu Zuowei reference lights；Two-beam is superimposed to form interference fringe through prism；Electrolytic cell
The change of middle solution concentration causes the change of solution refractive index and the change of object light phase, and interference fringe is shown as in interference pattern
Expansion, contraction and distortion.
3. solution concentration according to claim 1 changes real-time detecting system, it is characterized in that described video frequency signal processing
The hardware platform of system closes many Seed-Vpm642 up to company's production using Beijing, and its kernel processor chip is American TI Company
The DM642 digital signal processors of production.
4. solution concentration according to claim 1 changes real-time detecting system, it is characterized in that described video frequency signal processing
The CCD of system collects RGB component signal, and YCbCr (4 is converted to by Video Decoder TVP5150：2：2 forms) signal, adopt
Sample frequency is 25frame/s.
5. solution concentration according to claim 1 changes real-time detecting system, it is characterized in that DM642 in described system
Video input and output interface VPlA is arranged to video input 121, and VPOA is delivery outlet；After DM642 calculation process, output mark
Accurate 8 BT.656 digital video data streams, obtain being adapted to the PAL-system of screen display compound after SAA7121H Video codings
Video CVBS signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610573538.0A CN107643266A (en) | 2016-07-20 | 2016-07-20 | A kind of solution concentration changes real-time detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610573538.0A CN107643266A (en) | 2016-07-20 | 2016-07-20 | A kind of solution concentration changes real-time detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107643266A true CN107643266A (en) | 2018-01-30 |
Family
ID=61108565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610573538.0A Pending CN107643266A (en) | 2016-07-20 | 2016-07-20 | A kind of solution concentration changes real-time detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107643266A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068552A (en) * | 2019-05-14 | 2019-07-30 | 哈尔滨工业大学 | Divide amplitude type interferometer based on 2.02 μm of single longitudinal mode lasers |
| CN111337454A (en) * | 2020-04-17 | 2020-06-26 | 湖南文理学院 | Method for rapidly detecting solution concentration based on laser interference technology |
| CN111751264A (en) * | 2019-03-26 | 2020-10-09 | 上海电力学院 | Form on-line monitoring device of electric breakdown cell |
| WO2023005095A1 (en) * | 2021-07-27 | 2023-02-02 | 三门三友科技股份有限公司 | Online detection method for electrolytic copper impurities |
-
2016
- 2016-07-20 CN CN201610573538.0A patent/CN107643266A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751264A (en) * | 2019-03-26 | 2020-10-09 | 上海电力学院 | Form on-line monitoring device of electric breakdown cell |
| CN110068552A (en) * | 2019-05-14 | 2019-07-30 | 哈尔滨工业大学 | Divide amplitude type interferometer based on 2.02 μm of single longitudinal mode lasers |
| CN110068552B (en) * | 2019-05-14 | 2021-09-17 | 哈尔滨工业大学 | Split amplitude type interferometer based on 2.02 mu m single longitudinal mode laser |
| CN111337454A (en) * | 2020-04-17 | 2020-06-26 | 湖南文理学院 | Method for rapidly detecting solution concentration based on laser interference technology |
| WO2023005095A1 (en) * | 2021-07-27 | 2023-02-02 | 三门三友科技股份有限公司 | Online detection method for electrolytic copper impurities |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107643266A (en) | A kind of solution concentration changes real-time detecting system | |
| Jang et al. | Dynamic spectroscopic phase microscopy for quantifying hemoglobin concentration and dynamic membrane fluctuation in red blood cells | |
| Serov et al. | Full-field laser Doppler perfusion imaging and monitoring with an intelligent CMOS camera | |
| EP3252538B1 (en) | Apparatus and method for digital holographic imaging | |
| US7407817B2 (en) | Surface plasmon resonance sensors and method for detecting samples using the same | |
| CN107003638B (en) | Digital hologram photographic device and digital hologram drawing generating method | |
| CN103630086B (en) | A kind of dual wavelength simultaneous phase shifting interferometric method based on monochromatic CCD | |
| CN107941468A (en) | Visual dynamic detection method and device for polarization state of optical fiber | |
| CN103528524A (en) | Device and method of perspective measurement of distribution of out-of-plane displacement field in resin matrix composite | |
| CN112595677B (en) | Method, system, storage medium and device for monitoring polymer photocuring process | |
| CN110455799A (en) | A kind of high-resolution holographic microscope and method for living cells imaging | |
| Zhao et al. | An interferometric method for local phase modulation calibration of LC-SLM using self-generated phase grating | |
| CN105044034A (en) | Real-time measurement method for transparent solution concentration change | |
| Tychinsky et al. | Interference microscopy in cell biophysics. 1. Principles and methodological aspects of coherent phase microscopy | |
| CN204388780U (en) | A kind of multi-wavelength phase shift micro imaging system | |
| CN107908015A (en) | A kind of soft corneal contact lens and its tonometry method based on optical grating | |
| CN101995292B (en) | Method and device for measuring electro-optic coefficient of organic polymer film material by reflection method | |
| CN108592820B (en) | Interference surface shape detection method based on dynamic wavefront modulation and calculation hologram | |
| Hansen et al. | Digital image correlation at long working distances: The influence of diffraction limits | |
| Ning et al. | Single-shot measurement of polarization state at low light field using Mueller-mapping star test polarimetry | |
| Zhao et al. | Single-pixel phase microscopy without 4f system | |
| WO2016197364A1 (en) | Method and system for real-time calculating phase shift signal, plasma diagnostic method and system | |
| Wang et al. | Dynamically measuring unstable reaction–diffusion process by using digital holographic interferometry | |
| CN105181604A (en) | Multi-angle incident single shot ellipsometry measurement method | |
| Yuan et al. | Mapping the transient concentration field within the diffusion layer by use of the digital holographic reconstruction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180130 |
|
| WD01 | Invention patent application deemed withdrawn after publication |