CN105717111A - Automatic titration device capable of detecting change in colour of solution based on machine vision and detection method thereof - Google Patents
Automatic titration device capable of detecting change in colour of solution based on machine vision and detection method thereof Download PDFInfo
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- CN105717111A CN105717111A CN201610280709.0A CN201610280709A CN105717111A CN 105717111 A CN105717111 A CN 105717111A CN 201610280709 A CN201610280709 A CN 201610280709A CN 105717111 A CN105717111 A CN 105717111A
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- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/79—Photometric titration
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Abstract
The invention discloses an automatic titration device capable of detecting change in colour of solution based on machine vision. The automatic titration device comprises a shell as well as a detection platform and a titration cup which are arranged in the shell, wherein a machine vision device, a titration component, a stirring device and an industrial control device are also arranged in the shell, the machine vision device is used for receiving an image signal indicating the change in colour of the solution and converting the image signal into a digital signal; the titration component is used for titrating a titrant into the titration cup; the stirring device comprises a stirring part used for stirring to-be-detected solution and also comprises an image feedback device and a speed regulation device used for driving the stirring part to stir, and the image feedback device and the speed regulation device are connected by virtue of a signal, so that stirring speed of the stirring part can be conveniently adjusted; the industrial control device is used for controlling the machine vision device, the titration component and the stirring device to operate, receiving the digital signal of the machine vision device and calculating ingredients of a to-be-detected product in the titration cup. The automatic titration device provided by the invention can detect multiple grain composition parameters at one time.
Description
Technical field
The present invention relates to grain detection technique field, be specifically related to automatic titration device and the detection method of a kind of detection solution colour change based on machine vision.
Background technology
The assay method of grain has many drop reactions based on color change, such as: grain fatty acid, reducing sugar, acidity and acid value of oil and fat and peroxide value etc., but current each grain and oil, feedstuff, food inspection analysis room is used mostly general glass burette, mostly adopt manual titration, visually determine terminal, although equipment is simple, it is beneficial to popularization, but owing to ambient light is according to the difference with operator's experience, cause that personal error is bigger, particularly react to be particularly acute in fatty acid value and determination of POV, measurement result does not have comparability, give and judge that grain and oil quality brings difficulty, it is badly in need of considerable laboratory instrument and equipment.Automatic titration device on the market mostly also is potentiometric titrimeter, due to the clean and maintenance intricate operation of sensor (electrode) in direct metering system, cause that application is less, domestic existing can only detect a kind of index based on monochromatic photometric titrator, but without the photometric titrator that can measure multiple index simultaneously.
Summary of the invention
It is an object of the invention to provide the automatic titration device based on machine vision of a kind of efficiently convenient, objective and fair and method, provide technical support for grain and oil quality inspection.
Based on above-mentioned purpose, the present invention provides the automatic titration device of a kind of detection solution colour change based on machine vision, including housing and be arranged on the detection platform in described housing and titration cup, it is characterised in that: also include in described housing
Machine vision device, for receiving the picture signal of solution colour change, and convert described picture signal to digital signal；
Titration assembly, is used for titration titrant in described titration cup；
Agitating device, including the stirring parts for stirring solution to be measured, the arrangements for speed regulation also including image feedback device, driving described stirring parts to be stirred, described image feedback device is connected to adjust the mixing speed of described stirring parts with described arrangements for speed regulation signal；
Industry control device, is used for controlling described machine vision device, titration assembly, agitating device work, and receives the digital signal of described machine vision device, calculates the composition of product to be tested in described titration cup.
Preferably, described machine vision device includes:
Illumination casing, its top offers titration hole, and inner tip is provided with light source, and sidewall offers image collection window；Described titration cup is arranged in described lighting box body；
It is arranged at the light shield between described light source and titration cup；
The burette that one end is connected with described titration hole and the rim of a cup of the other end and described titration cup is oppositely arranged；
With described image collection window be oppositely arranged for gathering the imageing sensor of volumetric solution image in described titration cup.
Preferably,
Also include fixing the first support being connected with described imageing sensor.
Preferably, also including the second support offering vertical strip installing hole, described first support is connected with described second support bracket bolt by described vertical strip installing hole.
Preferably, also including the 3rd support offering horizontal strip installing hole, described second support is connected with described 3rd support bracket bolt by described horizontal strip installing hole.
Preferably, the bottom of described illumination casing offers horizontal strip installing hole, and described 3rd support is connected by the bottom bolts of described horizontal strip installing hole with described illumination casing.
Preferably, described stirring parts is the magnetic stir bar being placed in described titration cup, and described arrangements for speed regulation are provided with permanent magnet accordingly, drives described magnetic stir bar to be stirred rotating by magnetic force.
Preferably, the bottom of described titration cup is provided with cup, and described cup is provided with the groove for placing described titration cup, and described titration cup connects through described groove and described cup.
Present invention also offers the detection method of a kind of grain, comprise the steps:
1) titration cup including testing sample is placed in machine vision device, starts titration detection；Described machine vision device receives the picture signal of testing sample solution color change, and described picture signal converts to digital signal, and is sent to industry control device；
2) industry control device receives described digital signal, controls the titration speed of described titration appratus and the stir speed (S.S.) of agitating device；Data processing unit, transmission data-interface and reception data-interface, control parameter corresponding for comparison result, for receiving described digital signal by described reception data-interface, is sent to titration appratus and agitating device respectively through different reception data-interfaces by described data processing unit；
3) described data processing unit is by analyzing described digital signal, and whether the volume computing added by titrant reaches titration end-point, if it is, titration terminates, if it is not, then repeat step 2) operation.
Preferably, step 1) particularly as follows:
11) being placed in by testing sample in detection cup, be positioned in detection platform, described detection platform is positioned at lighting box, it is provided that white light source, and starts titration detection；
Imageing sensor receives the picture signal of solution colour change；
Digital information processing system, is converted to described picture signal digital signal, and is sent to described industry control device.
Preferably, step 2) particularly as follows:
21) described data processing unit receives described digital signal by described reception data-interface, and the image default with data base is compared；
22) control parameter corresponding for comparison result is sent to titration appratus and agitating device by described data processing unit respectively through described data-interface.
The automatic titration device of the detection solution colour change based on machine vision of the present invention, efficiently convenient, image acquisition photoenvironment is stable, it is stable at a high speed that DSP processes view data, the sensor Maintenance free of non-contact measurement mode, titration process is controlled, it is achieved the automatic judgement of titration end-point according to solution colour change.The method adopting the assembly of the invention detection grain and oil index of quality, objective and fair, greatly avoid extraneous light differential and the personal error interference to titration end-point, provide technical support for grain and oil quality judging.
The automatic titration device of a kind of detection solution colour change based on machine vision that the present invention proposes and method, avoid external interference and personal error, adopt non-contact detection mode, the such as metering system such as titration stirring and machine vision, sensor Maintenance free, multinomial grain and oil index such as grain fatty acid, reducing sugar, acidity and acid value of oil and fat and peroxide value etc. can be measured, it is adaptable to the fields such as grain and oil inspection chemical examination, food test, chemical analysis judge the index of quality detection of the drop reaction of terminal according to color change.
Accompanying drawing explanation
Fig. 1 is based on the structural representation of the automatic titration device of the detection solution colour change of machine vision；
The structural representation of the agitating device of the autotitrator that Fig. 2 provides for the embodiment of the present invention；
A kind of machine vision device schematic diagram based on automatic Titration that Fig. 3 provides for the embodiment of the present invention；
The structural representation of the adjustable support installing imageing sensor that Fig. 4 provides for the embodiment of the present invention；
A kind of machine vision device outside drawing based on automatic Titration that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art under not making creative work premise, the every other embodiment obtained, broadly fall into scope.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The present invention provides the automatic titration device of a kind of detection solution colour change based on machine vision, including housing and be arranged on the detection platform in described housing and titration cup, it is characterised in that: also include in described housing
Machine vision device, for receiving the picture signal of solution colour change, and convert described picture signal to digital signal；
Titration assembly, is used for titration titrant in described titration cup；
Agitating device, including the stirring parts for stirring solution to be measured, the arrangements for speed regulation also including image feedback device, driving described stirring parts to be stirred, described image feedback device is connected to adjust the mixing speed of described stirring parts with described arrangements for speed regulation signal；
Industry control device, is used for controlling described machine vision device, titration assembly, agitating device work, and receives the digital signal of described machine vision device, calculates the composition of product to be tested in described titration cup.
With reference to Fig. 1, the automatic titration device of the detection solution colour change based on machine vision of the present invention, including: stirring motor 1, titration cup 21, illumination casing 31, titration pump 5, lamp box 6, magnetic stir bar 7, imageing sensor 8, DSP (digital information processing system) board 9, industry control device 10, LCDs 11, printer 12.
White light source is had to provide stable photoenvironment, lighting box 3 to keep closing in titration process for lighting box 3 in lamp box 6, it is to avoid the impact of ambient light photograph.Imageing sensor 8 is connected with DSP (digital information processing system) board 9, and dsp board card 9 is connected with industry control device 10, and described industry control device is made up of data processing unit and interface card, and described data processing unit is preferably used arm processor.Imageing sensor 8 gathers in illumination casing 31 image of solution in titration cup 21, and by picture signal output to dsp board card 9, image color data is exported the arm processor of prepackage titration software after treatment by USB interface, arm processor judges whether color of image reaches software preset value, and control the speed of the rate of titration of titration pump 5, start and stop and stirring motor 1, titration process is controlled, it is achieved the automatic judgement of titration end-point according to solution colour change.
According to the present invention, refer to the structural representation of the agitating device of the autotitrator that Fig. 2, Fig. 2 provide for the embodiment of the present invention.
In a kind of specific embodiment, the agitating device of autotitrator provided by the invention includes stirring parts, also includes image feedback device and arrangements for speed regulation.Wherein, arrangements for speed regulation drive stirring parts to be stirred, and image feedback device is connected to adjust the mixing speed of stirring parts with arrangements for speed regulation signal.Pour solution to be measured into titration cup 21, solution starts chemical reaction in titration process, the color of solution starts change, by image collecting device, solution colour is acquired, image feedback device carries out the analysis contrast of data according to the image gathered, according to routine processes result, arrangements for speed regulation being sent signal, the mixing speed of stirring parts is increased or reduces according to the signal received by arrangements for speed regulation.
Autotitrator rate of titration in titration process based on graphical analysis can need change according to experiment, and for making the solution to be measured in titration cup 21 stir in time, mixing speed also needs timely change, avoids the formation of whirlpool and the quality of aeration image simultaneously.This device can be provided in the mixing speed of change within the scope of 10-500r/min, can need change mixing speed according to experiment in time, and the solution to be measured that stirs avoids the formation of whirlpool and the quality of aeration image simultaneously.
Concrete, arrangements for speed regulation can be motor 26, and motor 26 drives stirring parts to rotate.The rotating speed of motor, stopping position be solely dependent upon frequency and the umber of pulse of pulse signal, it is possible to control the speed of electric machine rotation by controlling pulse frequency, thus reaching the purpose of speed governing.In other embodiments, it is also possible to take other arrangements for speed regulation, as long as being capable of the speed governing of agitating device, the concrete form of concrete arrangements for speed regulation is not construed as limiting.
General, control device can be connected on motor 26, control the start and stop of motor 26, concrete can be electric machine controller 25, to avoid misoperation and cause accident, can also at the arranged outside casing of whole device, in said apparatus is positioned over, it is prevented that owing to extraneous factor affects titration results in titration process.
Further, stirring parts can be the magnetic stir bar 22 being placed in titration cup 21, and arrangements for speed regulation are provided with permanent magnet 27 accordingly.Magnetic stir bar 22 utilizes the principle of magnetic field and whirlpool, solution to be measured is put into after in titration cup 21, magnetic stir bar 22 is put in liquid simultaneously, arrangements for speed regulation arrange corresponding permanent magnet 27, after permanent magnet 27 produces magnetic field, magnetic stir bar 22 one-tenth circumferential cycle is driven to move thus reaching the purpose of agitated liquid.General, magnetic stir bar 22 can be column type, olive-type, octahedral type and ellipse.Concrete, it is possible to select the shape of magnetic stir bar 22 voluntarily, it is not construed as limiting.In other embodiments, other the device that can produce magnetic field can also be selected, arrangements for speed regulation could be arranged to energising spiral winding group, general arrangements for speed regulation are arranged on the lower section of dividing plate 24, spiral winding corresponding with the magnetic stir bar 22 in titration cup energising produces rotating excitation field, interact with magnetic stir bar 22, complete the whipping process to solution.
Further, stirring parts can be agitator, and arrangements for speed regulation drive agitator to rotate in titration cup 1.Can also be the stirring parts of other forms in other embodiments, such as stirring rod.The form of concrete stirring parts is not construed as limiting, as described above, as long as corresponding technique effect can be reached, does not repeat them here.
On the basis of the various embodiments described above, the base of titration cup 21 is provided with cup 23, and cup 23 is provided with the groove for placing titration cup 21, and titration cup 21 is through groove and cup 23 clamping.Groove on cup 23 and titration cup 21 interference fit so that being fixed in the installation process of titration cup 21 and cup 23, titration cup 21 position in whipping process is fixed, make stirring parts rotate in cup center, it is to avoid to collide with titration cup 21.
Concrete, groove can be provided with flexible member 28, titration cup 21 is through flexible member 28 and cup 23 clamping.Being provided with the flexible member 28 of projection on groove, when titration cup 21 is placed in the groove on cup 23, titration cup 21 extrudes flexible member 28, and the two interference fit also interacts, and completes fixing on cup 23 by flexible member 28.The concrete material of flexible member 8 can be rubber or plastics, and concrete can select voluntarily according to elastic performance, all in protection scope of the present invention.
Concrete, the number of cup 23 is multiple, and the cross-sectional area of the groove on multiple cups 23 all differs.Volume according to different titration cups and the size of cross-sectional area, multiple cup 23 can be set accordingly, size according to titration cup 21 sets the groove size on cup 23, multiple cup 23 is set to meet the titration needs of various sizes of titration cup 21, the concrete size that can set cup 23 upper groove according to the size of actual titration cup 21, so that titration cup 21 can be put into groove.
Further, the fixing dividing plate 24 that be connected dismountable with cup 23 it is provided with bottom cup 23.In the bottom of cup 23, dividing plate 24 is set, make that cup 23 is dismountable with dividing plate 24 fixing to be connected, when cup 23 need to clean or keep in repair, convenient dismounting, in other embodiments, it is also possible to be not provided with dividing plate 24, but be not provided with dividing plate 24 when the size of titration cup 21 changes, the device supporting titration cup 21 in autotitrator need to be changed so that experimental implementation becomes complicated.
Further, cup 23 can be provided with draw-in groove 29.Dividing plate 24 is provided with the boss matched with draw-in groove 29.In titration cup 21 seat bottom portion, draw-in groove 29 is set, the shape of draw-in groove 29 is not construed as limiting, can preferably be strip-shaped clamp groove 29, dividing plate 24 is provided with corresponding strip bulge, the two matches so that cup 23 can be fixedly mounted on dividing plate 24, can also be the draw-in groove 29 of other shapes in other embodiments, as long as cup 23 can be played fixing effect.
As shown in Figure 2, motor 26 drives two permanent magnets 27 to rotate and produces rotating excitation field, fill in the titration cup 21 of solution to be measured and place magnetic stir bar 22, titration cup 21 is placed on cup 23, cup 23 top has elastic component 28 for fixing titration cup 21, cup 23 is arranged on dividing plate 24, is fixed by draw-in groove 29.Electric machine controller 25 controls drive stepping motor 26, making the permanent magnet 27 on output shaft rotate and produces rotating excitation field, thus driving magnetic stir bar 22 in titration cup 21 to rotate, making the solution to be measured in titration cup 21 stir in titration process.According to titration experiments need select supporting titration cup 21 and cup 23, such as, the titration experiments measuring Fatty Acid Value In Grain selects titration cup 21 and the cup 23 of 100ml, the titration experiments measuring oil peroxidation value selects titration cup 21 and the cup 23 of 150ml, in two indices EXPERIMENTALTitration process, the mixing speed of this device changes with rate of titration, and mixing speed is adjustable in the scope of 10-500r/min.
According to the present invention, refer to Fig. 3, Fig. 4 and Fig. 5, a kind of machine vision device schematic diagram based on automatic Titration that Fig. 3 provides for the embodiment of the present invention.
In a kind of specific embodiment, provide a kind of machine vision device based on automatic Titration, including: being internally provided with the illumination casing 31 of titration cup 21, its top offers titration hole, inner tip is provided with light source 33, and sidewall offers image collection window 35；It is arranged at the light shield 310 between described light source 33 and titration cup 21；The burette 34 that one end is connected with described titration hole and the rim of a cup of the other end and described titration cup 21 is oppositely arranged；With described image collection window 35 be oppositely arranged for gathering the imageing sensor 36 of volumetric solution image in described titration cup 21.
Owing to being provided with light shield 310 between described light source 33 and titration cup 21, the shadow that light is radiated on titration cup 21 and in titration process, in glass, motive liquid produces of light source 33 can be prevented effectively from, hot spot, reflective and metaboly, simultaneously, owing to light source 33 is arranged at illumination casing 31 top, imageing sensor 36 is arranged at illumination casing 31 side, so the emergent ray of light source 33 is mutually perpendicular to the light after the volumetric solution reflection of titration cup 21 and motion gathered by imageing sensor 36, the image that imageing sensor 36 collects is made not only to occur without hot spot and reflective, titration process accurately detects solution colour, and color saturation is high, picture quality is clear.
Further, in above-mentioned machine vision device, also include and described fixing the first support 37 being connected of imageing sensor 36.
Further, in above-mentioned machine vision device, also including the second support 38 offering vertical strip installing hole, described first support 37 is connected with described second support 38 bolt by described vertical strip installing hole.
Further, in above-mentioned machine vision device, also including the 3rd support 39 offering horizontal strip installing hole, described second support 38 is connected with described 3rd support 39 bolt by described horizontal strip installing hole.
Further, in above-mentioned machine vision device, the bottom of described illumination casing 31 offers horizontal strip installing hole, and described 3rd support 39 is connected by the bottom bolts of described horizontal strip installing hole with described illumination casing 31.
Concrete, the light source 33 in illumination casing 31 is large power white light LED or D65, D50, CWF, TL84 standard light source 33, and LED light source 33 colour temperature is 3000K～7000K, the photoenvironment simulating nature light of lighting box, guarantees that in image acquisition process, illumination is stable simultaneously.Titration cup 21 is placed in lighting box, and in titration process, volumetric solution is instilled by burette 34, and the solution to be measured in titration cup 21 is stirring and evenly mixing due to the rotation of magnetic stir bar, and during nearly titration end-point, solution colour changes.Imageing sensor 36 gathers the view data of solution to be measured by the window of illumination casing 31, imageing sensor 36 is arranged on the adjustable support outside lighting box, adjustable support is the assembly of first support the 37, second support 38 and the 3rd support 39, imageing sensor 36 is fixing with the first support 37 to be connected, first support 37 is arranged on the second support 38 by bolt, owing to the second support 38 having multiple vertical strip installing hole, the position of imageing sensor 36 therefore can be adjusted up and down；Second support 38 is arranged on the 3rd support 39 by bolt, owing to the 3rd support 39 having multiple horizontal strip installing hole, therefore can left and right adjust imageing sensor 36 position；3rd support 39 is arranged on lighting box base plate by bolt, owing to lighting box base plate having horizontal strip installing hole, therefore can before and after adjust imageing sensor 36 position..Can move along direction, three, installing hole top to bottom, left and right, front and rear by regulating imageing sensor 36, imageing sensor 36 is adjusted optimum sampling position.Meanwhile, imageing sensor 36 gathers the view data of solution to be measured by the image collection window 35 of illumination casing 31, and not by the interference of ambient light photograph, illumination casing 31 provides the stable reaction environment not shone interference by ambient light of a light source 33 for titration process.
Further, in above-mentioned machine vision device, described light shield 310 is translucent plastic light shield 310.Light shield 310 includes but not limited to the light shield 310 of translucency plastic material, it can also be white cloth etc., as long as not havinging hot spot, reflective, metaboly when guaranteeing the volumetric solution avoiding light source 33 to expose on titration cup 21 or in titration cup 21, improve the definition of image in image acquisition process.
Further, illumination casing 31 is white plastic illumination casing.
Further, illumination casing 31 inwall is provided with aluminum metal layer.
It is pointed out that illumination casing 31 includes but not limited to white plastic illumination casing, illumination casing 31 inwall includes but not limited to aluminum metal layer, as long as metal level is Lycoperdon polymorphum Vitt, it becomes possible to prevent the interference that solution colour to be measured is detected by sampling background colour.
Machine vision device provided by the invention, lighting box keeps closing in titration process, avoiding the impact of ambient light photograph, image acquisition photoenvironment is stable, the image of motive liquid in titration glass in this device collection titration process, do not have hot spot and iridescent image, color saturation is high, and picture quality is clear, the accurately color change of solution to be measured in detection titration process, greatly avoid extraneous light differential and the personal error interference to titration end-point, improve grain and oil quality judging.
ARM is connected with input/output unit, liquid crystal display or touch-screen display 11 and printer 12, it is not necessary to configuration computer, it is also possible to by network interface, titration results is exported server.
Titration pump 5 is connected with ARM, and the titrant in reagent bottle 4 is controlled titration pump 5 by ARM and drives the volume instilling titration cup 21, ARM calculating titrant instillation, and titration pump 5 is syringe pump.
Present invention also offers the detection method of a kind of grain, comprise the steps:
1) titration cup including testing sample is placed in machine vision device, starts titration detection；Described machine vision device receives the picture signal of testing sample solution color change, and described picture signal converts to digital signal, and is sent to industry control device；
2) industry control device receives described digital signal, controls the titration speed of described titration appratus and the stir speed (S.S.) of agitating device；Data processing unit, transmission data-interface and reception data-interface, control parameter corresponding for comparison result, for receiving described digital signal by described reception data-interface, is sent to titration appratus and agitating device respectively through different reception data-interfaces by described data processing unit；
3) described data processing unit is by analyzing described digital signal, and whether the volume computing added by titrant reaches titration end-point, if it is, titration terminates, if it is not, then repeat step 2) operation.
Preferably, step 1) particularly as follows:
11) being placed in by testing sample in detection cup, be positioned in detection platform, described detection platform is positioned at lighting box, it is provided that white light source, and starts titration detection；
Imageing sensor receives the picture signal of solution colour change；
Digital information processing system, is converted to described picture signal digital signal, and is sent to described industry control device.
Preferably, step 2) particularly as follows:
21) described data processing unit receives described digital signal by described reception data-interface, and the image default with data base is compared；
22) control parameter corresponding for comparison result is sent to titration appratus and agitating device by described data processing unit respectively through described data-interface.
According to the present invention, in described detection method process, ARM analyzes in described digital signal and is loaded with colouring information, and the volume calculating the titrant of dropping determines that the method for titration end-point is preferably used national standard LS/T3706-2012 " inspection of grain and oil instrument automatic titration instrument technical conditions and experimental technique " and standard GB/T/T20570-2015 " storing corn quality judging rule " and carries out color analysis and calculating, obtain testing result, and exported over the display by software.
The automatic titration device of the detection solution colour change based on machine vision of the present invention, efficiently convenient, image acquisition photoenvironment is stable, it is stable at a high speed that DSP processes view data, the sensor Maintenance free of non-contact measurement mode, titration process is controlled, it is achieved the automatic judgement of titration end-point according to solution colour change.The method adopting the assembly of the invention detection grain and oil index of quality, objective and fair, greatly avoid extraneous light differential and the personal error interference to titration end-point, provide technical support for grain and oil quality judging.
Disclosed above being only specific implementation of the patent example, but this patent is not limited to this, for the person of ordinary skill of the art, under the premise of not departing from the present invention, the deformation made should be regarded as belonging to scope.
Above a kind of automatic titration device based on the detection solution colour change of machine vision provided by the present invention is described in detail.Principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention carries out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (10)
1. based on an automatic titration device for the detection solution colour change of machine vision, including housing and be arranged on the detection platform in described housing and titration cup, it is characterised in that: also include in described housing
Machine vision device, for receiving the picture signal of solution colour change, and convert described picture signal to digital signal；
Titration assembly, is used for titration titrant in described titration cup；
Agitating device, including the stirring parts for stirring solution to be measured, the arrangements for speed regulation also including image feedback device, driving described stirring parts to be stirred, described image feedback device is connected to adjust the mixing speed of described stirring parts with described arrangements for speed regulation signal；
Industry control device, is used for controlling described machine vision device, titration assembly, agitating device work, and receives the digital signal of described machine vision device, calculates the composition of product to be tested in described titration cup.
2. titration appratus according to claim 1, it is characterised in that described machine vision device includes:
Illumination casing, its top offers titration hole, and inner tip is provided with light source, and sidewall offers image collection window；Described titration cup is arranged in described lighting box body；
It is arranged at the light shield between described light source and titration cup；
The burette that one end is connected with described titration hole and the rim of a cup of the other end and described titration cup is oppositely arranged；
With described image collection window be oppositely arranged for gathering the imageing sensor of volumetric solution image in described titration cup.
3. titration appratus according to claim 1 and 2, it is characterised in that
Also include fixing the first support being connected with described imageing sensor.
4. titration appratus according to claim 3, it is characterised in that also including the second support offering vertical strip installing hole, described first support is connected with described second support bracket bolt by described vertical strip installing hole.
5. titration appratus according to claim 4, it is characterised in that also include the 3rd support offering horizontal strip installing hole, described second support is connected with described 3rd support bracket bolt by described horizontal strip installing hole.
6. titration appratus according to claim 5, it is characterised in that the bottom of described illumination casing offers horizontal strip installing hole, and described 3rd support is connected by the bottom bolts of described horizontal strip installing hole with described illumination casing.
7. titration appratus according to claim 1, it is characterised in that described stirring parts is the magnetic stir bar being placed in described titration cup, described arrangements for speed regulation are provided with permanent magnet accordingly, drive described magnetic stir bar to be stirred rotating by magnetic force.
8. a detection method for grain, comprises the steps:
1) titration cup including testing sample is placed in machine vision device, starts titration detection；Described machine vision device receives the picture signal of testing sample solution color change, and described picture signal converts to digital signal, and is sent to industry control device；
2) industry control device receives described digital signal, controls the titration speed of described titration appratus and the stir speed (S.S.) of agitating device；Data processing unit, transmission data-interface and reception data-interface, control parameter corresponding for comparison result, for receiving described digital signal by described reception data-interface, is sent to titration appratus and agitating device respectively through different reception data-interfaces by described data processing unit；
3) described data processing unit is by analyzing described digital signal, and whether the volume computing added by titrant reaches titration end-point, if it is, titration terminates, if it is not, then repeat step 2) operation.
9. method according to claim 8, it is characterised in that step 1) particularly as follows:
11) being placed in by testing sample in detection cup, be positioned in detection platform, described detection platform is positioned at lighting box, it is provided that white light source, and starts titration detection；
Imageing sensor receives the picture signal of solution colour change；
Digital information processing system, is converted to described picture signal digital signal, and is sent to described industry control device.
10. method according to claim 8, it is characterised in that step 2) particularly as follows:
21) described data processing unit receives described digital signal by described reception data-interface, and the image default with data base is compared；
22) control parameter corresponding for comparison result is sent to titration appratus and agitating device by described data processing unit respectively through described data-interface.
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| CN112926252B (en) * | 2021-02-09 | 2024-03-26 | 北京工业大学 | Liquid and cloth interaction phenomenon simulation method |
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