CN203824918U - Color sensor-based device for detecting stoving strength through automatic titration - Google Patents
Color sensor-based device for detecting stoving strength through automatic titration Download PDFInfo
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- CN203824918U CN203824918U CN201420204512.5U CN201420204512U CN203824918U CN 203824918 U CN203824918 U CN 203824918U CN 201420204512 U CN201420204512 U CN 201420204512U CN 203824918 U CN203824918 U CN 203824918U
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- solenoid valve
- sugarcane juice
- color sensor
- starch fluid
- juice
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Abstract
The utility model discloses a color sensor-based device for detecting the stoving strength through the automatic titration. The device comprises an accurate sampling device, a cleaning device, an accurate titration device, a color sensor, an embedded type processor and output equipment; when the device is used for detection, two liquid-taking devices measure and obtain quantitative cane juice liquid and quantitative starch fluid which are conveyed to a titration bottle by a peristaltic pump, the accurate titration device slowly drops an iodine solution in the titration bottle through a metering injection pump to obtain a mixture, the mixture is stirred and rapidly reacted, the embedded type processor switches off a titration injection pump according to a signal of color change of titration end point reaction liquid, wherein the signal is transmitted by the color sensor in real time, so that the stoving strength value can be accurately obtained. The device can provide the powerful technical support and guarantee for production of sugar enterprises.
Description
Technical field
The utility model relates to intensity of sulfitation on-line measuring device in a kind of sugar refining technology.The device based on color sensor detection automatic Titration terminal detecting in particular for intensity of sulfitation in sugar refining technology.
Background technology
Cane sugar manufacture technique is mainly divided into extraction of the juice, peace and quiet, evaporation, cane sugar boiling and crystal and these processes of purging.What adopt in the most of sugar refinery of sugarcane juice cleaning technique section China is sulfurous method.Sulfurous method refers in clarification process section and passes into sulfur dioxide gas, part sulphuric dioxide at high temperature generates calcium sulfite flocculate with the lime reaction adding in advance, make colloidal material sedimentation in sugarcane juice reach the object of clarification, another part sulphuric dioxide reacts with the pigment in sugarcane juice, and sugarcane juice color is shoaled.Sulphuric dioxide added and has at least part colloidal material and cannot precipitate, and clarifying effect is undesirable, and the efficiency of decolouring also reduces.But sulphuric dioxide passes into too much, not only the effect of clarification can be more not remarkable, and can make the residual quantity of sulphur in the follow-up white sugar obtaining greatly increase.Excess of sulfur residual in food has larger injury to health, and GB2760-2011 " food additives use standard " has strict regulation to the sulfur dioxide residual quantity in sugar---and must not be higher than 0.1g/kg.Because stove drying effect relation is to white sugar quality quality, therefore sugar enterprise all takes much count of this procedure of stove drying.The main dependence of the intensity of sulfitation in sugar refinery detection at present analyst gets a sample per half an hour and detects with iodometric titrationiodimetry titration in laboratory.The length but manual titration's analytic process of this routine expends time in, the judgement of titration process and titration end-point all relies on the visual judgement of people, reads volume number, endpoint, conical flask mixing evenness, and tapping speed etc. all can be introduced measuring error.Existing a kind of stove drying pick-up unit employing conductance electrode judges the terminal of titration, but electrode contacts easy fouling passivation for a long time with reactant liquor, causes detection reappearance to reduce and improve maintenance rate; Titration peristaltic pump used can be because the aging accuracy that causes titration metering of peristaltic pump flexible pipe reduces after a period of time is used; Conductance electrode price is relatively high simultaneously, has promoted the cost of package unit.
Utility model content
The large labour intensity having in order to overcome manual detection, lower operating efficiency, relatively low measuring accuracy and reappearance, be subject to external environment as large in the impact of people's operant level and detect the shortcoming that information cannot be provided for the adjusting of stove drying device in real time, the utility model provides a kind of real-time online to detect the device of intensity of sulfitation, this device energy real-time online detects intensity of sulfitation value in sugar refinery stove drying operation section accurately, for the intake of sulphuric dioxide provides in real time foundation accurately.
The utility model solves the technical scheme that its technical matters adopts:
A kind of device that detects intensity of sulfitation based on color sensor automatic Titration, comprise that the sugarcane juice connecting successively by pipeline filters cooling device, sugarcane juice draw-off pump, sugarcane juice solenoid valve, mixed juice peristaltic pump, also comprise sugarcane juice quantity tube, iodine liquid storage bin, embedded microprocessor, one end of described sugarcane juice quantity tube is connected on the pipeline between sugarcane juice solenoid valve and mixed juice peristaltic pump by three-way pipe, the other end by four-way piece respectively with pure water solenoid valve, sugarcane juice retaining valve, one end of the second starch fluid solenoid valve is connected, the other end of described pure water solenoid valve is connected with pure water storage bin, the other end of described sugarcane juice retaining valve is connected with sugarcane juice heating kettle, the other end of described the second starch fluid solenoid valve is connected with starch fluid quantitative slot one end, the described starch fluid quantitative slot other end is connected with starch fluid storage bin by the first starch fluid solenoid valve, described mixed juice wriggling delivery side of pump is connected with drop reaction bottle, the sidewall of described drop reaction bottle is provided with light source and color sensor, in the light source of described drop reaction bottle and drop reaction bottle sidewall and the magazine of color sensor in same sealing, there is no the impact of extraneous light, described drop reaction bottle bottom is provided with magnetic stirring apparatus and draining solenoid valve, described iodine liquid storage bin by pipeline successively with the first iodine liquid retaining valve, iodine liquid metered shot pump, the second iodine liquid retaining valve and drop reaction bottle are connected, described embedded microprocessor by circuit respectively with described color sensor, sugarcane juice solenoid valve, pure water solenoid valve, the first starch fluid solenoid valve, the second starch fluid solenoid valve, draining solenoid valve, sugarcane juice draw-off pump, mixed juice peristaltic pump, iodine liquid metered shot pump, magnetic stirring apparatus, output device is connected, and described output device is buzzer siren, LCD display or printer, described iodine liquid metered shot pump, sugarcane juice draw-off pump, mixed juice peristaltic pump drives by stepper motor.
Further, described starch fluid quantitative slot top is provided with Miniature ball-cock, and described Miniature ball-cock opening communicates with ambient atmos.
Further, described stirrer is magnetic stirring apparatus, and magnetic stirring apparatus only has the stirrer that a shell is teflon to contact stirring, teflon stable performance with liquid, do not react with reactant liquor, and the speed stirring is controlled by the speed that regulates motor rotation very easily.
Further, described output device is buzzer siren, LCD display or printer, and handled easily person observes and preserves.
Further, described sugarcane juice quantity tube is straight tube or swan-neck, adopts the form of straight tube, processing is simple and easy to realize, and can be used for the occasion that installation space is more abundant, and prescribes a time limit when installation space has, can adopt swan-neck, as spirality, U-shaped, S shape, W shape, V-arrangement etc.
Further, described embedded microprocessor adopts STM32F407IGT6 chip, and described color sensor model is TCS3200.
Further, the light source of described drop reaction bottle and drop reaction bottle sidewall and color sensor are in magazine same sealing, that there is no external light influence.
Compared with prior art, the measurement device that the utility model provides is accurate, favorable reproducibility, detecting sensor and reactant liquor are contactless, corrosion-free and fouling, stable performance, is not vulnerable to external interference, without replacing, detect simultaneously cheap, simple in structure, reasonable in design reliably, reduce the use of pump, reduced energy consumption and cost.
Brief description of the drawings
Fig. 1 is the structural representation of inspection described in the utility model titration apparatus.
Fig. 2 is embedded microprocessor control schematic diagram of the present utility model.
In figure: 1. sugarcane juice filters cooling device, 2. sugarcane juice draw-off pump, 3. sugarcane juice solenoid valve, 4. sugarcane juice quantity tube, 5. pure water solenoid valve, 6. pure water storage bin, 7. sugarcane juice retaining valve, 8. starch fluid storage bin, 9. the first starch fluid solenoid valve, 10. Miniature ball-cock, 11. starch fluid quantitative slots, 12. second starch fluid solenoid valves, 13. mixed juice peristaltic pumps, 14. iodine liquid storage bins, 15 first iodine liquid retaining valves, 16. iodine liquid metered shot pumps, 17. second iodine liquid retaining valves, 18. drop reaction bottles, 19. color sensors, 20. draining solenoid valves, 21. magnetic stirring apparatuss, 22 embedded microprocessors, 23 output devices.
Embodiment
Below in conjunction with the drawings and specific embodiments, utility model object of the present utility model is described in further detail, embodiment can not repeat one by one at this, but therefore embodiment of the present utility model is not defined in following examples.
As shown in Figure 1, a kind of device that detects intensity of sulfitation based on color sensor automatic Titration, comprise that the sugarcane juice connecting successively by pipeline filters cooling device 1, sugarcane juice draw-off pump 2, sugarcane juice solenoid valve 3, mixed juice peristaltic pump 13, also comprise sugarcane juice quantity tube 4, iodine liquid storage bin 14, embedded microprocessor 22, output device 23, one end of described sugarcane juice quantity tube 4 is connected on the pipeline between sugarcane juice solenoid valve 3 and mixed juice peristaltic pump 13 by three-way pipe, the other end by four-way piece respectively with pure water solenoid valve 5, sugarcane juice retaining valve 7, one end of the second starch fluid solenoid valve 12 is connected, the other end of described pure water solenoid valve 5 is connected with pure water storage bin 6, the other end of described sugarcane juice retaining valve 7 is connected with sugarcane juice heating kettle, the other end of described the second starch fluid solenoid valve 12 is connected with starch fluid quantitative slot 11 one end, described starch fluid quantitative slot 11 tops are provided with Miniature ball-cock 10, described Miniature ball-cock 10 openings communicate with ambient atmos, described starch fluid quantitative slot 11 other ends are connected with starch fluid storage bin 8 by the first starch fluid solenoid valve 9, the output terminal of described mixed juice peristaltic pump 13 is connected with drop reaction bottle 18, the sidewall of described drop reaction bottle 18 is provided with light source and color sensor 19 and drop reaction bottle 18, light source and color sensor 19 in same darkroom, and described color sensor 19 models are TCS3200.The bottom of drop reaction bottle 18 is provided with magnetic stirring apparatus 21 and draining solenoid valve 20, described iodine liquid storage bin 14 by pipeline successively with the first iodine liquid retaining valve 15, iodine liquid metered shot pump 16, the second iodine liquid retaining valve 17 and drop reaction bottle 18 are connected, described embedded microprocessor 22 adopts STM32F407IGT6 chip, by circuit respectively with described color sensor 19, sugarcane juice solenoid valve 3, pure water solenoid valve 5, the first starch fluid solenoid valve 9, the second starch fluid solenoid valve 12, draining solenoid valve 20, sugarcane juice draw-off pump 2, mixed juice peristaltic pump 13, iodine liquid metered shot pump 16, magnetic stirring apparatus 21, output device 23 is connected, described output device is buzzer siren, LCD display or printer (seeing Fig. 2), described iodine liquid metered shot pump 16, sugarcane juice draw-off pump 2, mixed juice peristaltic pump 13 drives by stepper motor.
Sugarcane juice quantity tube 4 is through precision measurement, the amount of liquid stored accurately and have a good reappearance, avoid aging the caused error in dipping of sugarcane juice draw-off pump 2 because of wriggle pipeline, cost is also very cheap simultaneously, according to different situations, described sugarcane juice quantity tube 4 can be straight tube or swan-neck, adopt the form of straight tube, processing is simple and easy to realize, can be used for the occasion that installation space is more abundant, and prescribe a time limit when installation space has, can adopt swan-neck, as spirality, U-shaped, S shape, W shape, V-arrangement etc.Sugarcane juice draw-off pump 2 extracts sugarcane juice sample to be detected and filters cooling device 1 to sugarcane juice quantity tube 4 through sugarcane juice, the sugarcane juice retaining valve 7 of unnecessary sugarcane juice after sugarcane juice quantity tube 4 passes back in the sugarcane juice heating kettle in sugar refinery, reduce the waste of sugarcane juice, ensured quantitative accuracy and reappearance simultaneously.Described starch fluid storage bin 8, the first starch fluid solenoid valve 9, starch fluid quantitative slot 11, Miniature ball-cock 10 are formed and are accurately got starch fluid device by pipeline; Starch fluid quantitative slot 11 is connected with starch fluid storage bin 8 by the first starch fluid solenoid valve 9, and starch fluid quantitative slot 11 tops are provided with Miniature ball-cock 10, and the opening UNICOM of Miniature ball-cock 10 ambient atmos; Open after the first starch fluid solenoid valve 9, starch fluid flows under the influence of gravity in starch fluid quantitative slot 11, and in the time being full of starch fluid quantitative slot 11, relies on buoyancy promotion Miniature ball-cock 10 to close, and reaches automatic accurate object of getting liquid; Because starch fluid is comparatively clarified, and sample lessly, quantitative requirement is relatively low, therefore adopts this kind of sampling method to reach the object of automatic quantitative liquid taking under lower cost.After sugarcane juice sample and starch fluid are got liquid and are all completed, open the second starch fluid solenoid valve 12, sugarcane juice quantity tube 4 and starch fluid quantitative slot 11 are in a circulation passage, be connected with ambient atmosphere via the pipeline on Miniature ball-cock 10, both together can be pumped in drop reaction bottle 18 by a mixed juice peristaltic pump 13 that is connected to sugarcane juice quantity tube 4 other ends; Pure water storage bin 6 is also connected with sugarcane juice quantity tube 4 by a pure water solenoid valve 5, after opening this pure water solenoid valve 5, can under the effect of mixed juice peristaltic pump 13, rinse sugarcane juice quantity tube 4 and lead to residual sugarcane juice and starch fluid in the pipeline of drop reaction bottle 8, improve the accuracy and the reappearance that detect.Only opening pure water out when the pure water solenoid valve 5 of passage and the sugarcane juice solenoid valve 3 of sugarcane juice sample intake passage, can clean sugarcane juice by reverse unlatching sugarcane juice draw-off pump 2 and filter cooling device 1.Iodine liquid metered shot pump 16 extracts iodine liquid and accurately liquid is slowly splashed in titration bottle, under magnetic agitation, reacts with sulphuric dioxide and the sulphite of reductibility in sugarcane juice liquid.Iodine liquid metered shot pump 16 is by step motor control, and step motor control makes titration volume metering very accurate, there will not be and occurs that because pipeline is aging error in dipping becomes large situation.The light source of described drop reaction bottle 18 and drop reaction bottle 18 sidewalls and color sensor 19 are in magazine same sealing, that there is no external light influence.Light source in sealed magazine sends uniform white light, color sensor 19 receives the reflected light of the liquid facing through drop reaction bottle 18, and light signal is converted to electrical signal transfer goes out, will be through the white balance coefficient correction that test obtains in advance when described color sensor 19 transmission of signals are processed to flush bonding processor.The iodine liquid splashing into reacts with sulphuric dioxide and the sulphite of reductibility in sugarcane juice liquid under magnetic agitation, after property substance reaction to be restored is complete, the iodine liquid splashing into and starch coloration, make reactant liquor become blue, and it is extremely sensitive and remarkable to develop the color, now reaction end signal is passed to embedded microprocessor 22 by color sensor 19, and embedded microprocessor 22 is closed iodine liquid metered shot pump 16 and stopped titration, and embedded microprocessor 16 obtains titration and consume the volume of iodine liquid.Get sugarcane juice liquid and amass as 10ml, iodine liquid concentration is 1/64mol/L, because chemical equation I
2+ H
2sO
3+ H
2o=H
2sO
4+ 2HI, by the definition of intensity of sulfitation " volume (ml) number of the 1/64mol/L iodine liquid being consumed with titration 10ml defeco-sulfitated juice represents intensity of sulfitation ", is titrated to terminal and consumes iodine liquid product and be the value of intensity of sulfitation.The intensity of sulfitation value obtaining and the correlated results of release are printed and are shown by output device, for the real-time adjusting of sulphuric dioxide provides data accurately.
When detection, operating process is as follows in detail:
As Fig. 1, shown in Fig. 2, Fig. 1 only draws the control line of partially embedded microprocessor 22, control linkage is as Fig. 2 in detail, starting outfit, this device is under the control of embedded microprocessor 22, first close pure water solenoid valve 5, the second starch fluid solenoid valve 12 and draining solenoid valve 20, open sugarcane juice solenoid valve 3 and the first starch fluid solenoid valve 9, then open sugarcane juice draw-off pump 2, make sugarcane juice be full of sugarcane juice quantity tube 4, unnecessary sugarcane juice passes back in the sugarcane juice heating kettle in sugar refinery along sugarcane juice retaining valve 7, reduce the waste of sugarcane juice, quantitative accuracy and reappearance have been ensured simultaneously.Meanwhile starch fluid first starch fluid solenoid valve 9 through opening under Action of Gravity Field is full of starch fluid quantitative slot 11, and touches Miniature ball-cock 10 closing volume passages, ensures the accuracy of starch fluid metering.Wait for that sugarcane juice quantity tube 4 and starch fluid quantitative slot 11 are accurately full of after liquid, close sugarcane juice solenoid valve 3 and the first starch fluid solenoid valve 9, then open the second starch fluid solenoid valve 12, at this moment sugarcane juice quantity tube 4 and starch fluid quantitative slot 11 are in same circulation passage, be connected with ambient atmosphere via the pipeline on Miniature ball-cock 10, open mixed juice peristaltic pump 13, by the starch fluid suction drop reaction bottle 18 in sugarcane juice to be measured in sugarcane juice quantity tube 4 and starch fluid quantitative slot 11; Then open pure water solenoid valve 5 and close the second starch fluid solenoid valve 12, extract sugarcane juice residual in the pure water rinsing sugarcane juice quantity tube 4 in pure water storage bin 6 and starch fluid in drop reaction bottle 18.Wait to close after rinsing mixed juice peristaltic pump 13 and open the iodine liquid that iodine liquid metered shot pump 16 extracts in iodine liquid storage bin 14, then under the control of embedded microprocessor 22, slowly iodine drop being entered in drop reaction bottle 18; Open magnetic stirring apparatus 21 stirring reaction liquid simultaneously, react fully and react completely rapidly, light source and the color sensor 19 in addition together opened, it obtains the color signal of reactant liquor in time, and light signal is converted to electrical signal transfer to embedded microprocessor 22, the speed that embedded microprocessor 22 is injected according to the signal controlling iodine liquid metered shot pump 16 of feedback, when drop reaction liquid color does not produce blueness, or after producing when pop-off, 16 injections of iodine liquid metered shot pump are accelerated; When drop reaction liquid change color blueness, and blue disappear slack-off, can be by color sensor is clear while capturing, iodine liquid metered shot pump 16 injection speeds slow down; When receiving the color change of titration end-point generation, and when color continues not disappear, the signal at stop iodine liquid metered shot pump 16 that described embedded microprocessor 22 feeds back according to color sensor 19, then embedded microprocessor 22 is converted to intensity of sulfitation value by the volume of measured iodine liquid and sends to output device to carry out output display and printing, and the information accurately that provides in real time that adds of the sulfur dioxide gas scale of construction is provided.After finishing, titration opens mixed juice peristaltic pump 13, extract the pure water rinsing sugarcane juice quantity tube 4 in pure water storage bin 6, then open draining solenoid valve 20, drain waste liquid, after waste liquid is drained, close draining solenoid valve 20, now completed the automatic testing process of intensity of sulfitation one time.
After repeated detection completes, open pure water solenoid valve 5 and sugarcane juice solenoid valve 3, and close the second starch fluid solenoid valve 12, make pure water storage bin 6, sugarcane juice quantity tube 4 filter cooling device 1 with sugarcane juice and form independently path, oppositely open sugarcane juice draw-off pump 2, make pure water pass through sugarcane juice quantity tube 4 and filter cooling device 1 with sugarcane juice, reach the object of cleaning sugarcane juice quantity tube 4 and sugarcane juice filtration cooling device 1.Complete since then detection and be interrupted all processes cleaning.
Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.All any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of the utility model claim.
Claims (7)
1. one kind is detected the device of intensity of sulfitation based on color sensor automatic Titration, comprise that the sugarcane juice connecting successively by pipeline filters cooling device (1), sugarcane juice draw-off pump (2), sugarcane juice solenoid valve (3), mixed juice peristaltic pump (13), is characterized in that:
Also comprise sugarcane juice quantity tube (4), iodine liquid storage bin (14), embedded microprocessor (22), output device (23), one end of described sugarcane juice quantity tube (4) is connected on the pipeline between sugarcane juice solenoid valve (3) and mixed juice peristaltic pump (13) by three-way pipe, the other end by four-way piece respectively with pure water solenoid valve (5), sugarcane juice retaining valve (7), one end of the second starch fluid solenoid valve (12) is connected, the other end of described pure water solenoid valve (5) is connected with pure water storage bin (6), the other end of described sugarcane juice retaining valve (7) is connected with sugarcane juice heating kettle, the other end of described the second starch fluid solenoid valve (12) is connected with one end of starch fluid quantitative slot (11), described starch fluid quantitative slot (11) other end is connected with starch fluid storage bin (8) by the first starch fluid solenoid valve (9), the output terminal of described mixed juice peristaltic pump (13) is connected with drop reaction bottle (18), the sidewall of described drop reaction bottle (18) is provided with light source and color sensor (19), bottom is provided with stirrer (21) and draining solenoid valve (20), described iodine liquid storage bin (14) by pipeline successively with the first iodine liquid retaining valve (15), iodine liquid metered shot pump (16), the second iodine liquid retaining valve (17) and drop reaction bottle (18) are connected, described embedded microprocessor (22) by circuit respectively with described color sensor (19), sugarcane juice solenoid valve (3), pure water solenoid valve (5), the first starch fluid solenoid valve (9), the second starch fluid solenoid valve (12), draining solenoid valve (20), sugarcane juice draw-off pump (2), mixed juice peristaltic pump (13), iodine liquid metered shot pump (16), stirrer (21), output device (23) is connected, described iodine liquid metered shot pump (16), sugarcane juice draw-off pump (2), mixed juice peristaltic pump (13) drives by stepper motor.
2. the device that detects intensity of sulfitation based on color sensor automatic Titration according to claim 1, it is characterized in that: described starch fluid quantitative slot (11) top is provided with Miniature ball-cock (10), described Miniature ball-cock (10) opening communicates with ambient atmos.
3. the device that detects intensity of sulfitation based on color sensor automatic Titration according to claim 1, is characterized in that: described stirrer (21) is magnetic stirring apparatus.
4. the device that detects intensity of sulfitation based on color sensor automatic Titration according to claim 1, is characterized in that: described output device (23) is buzzer siren, LCD display or printer.
5. the device that detects intensity of sulfitation based on color sensor automatic Titration according to claim 1, is characterized in that: described sugarcane juice quantity tube (4) is straight tube or swan-neck.
6. the device that detects intensity of sulfitation based on color sensor automatic Titration according to claim 1, it is characterized in that: described embedded microprocessor (22) adopts STM32F407IGT6 chip, and described color sensor (19) model is TCS3200.
7. the device that detects intensity of sulfitation based on color sensor automatic Titration according to claim 1, is characterized in that: the light source of described drop reaction bottle (18) and drop reaction bottle (18) sidewall and color sensor (19) are in magazine same sealing, that there is no external light influence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204512.5U CN203824918U (en) | 2014-04-24 | 2014-04-24 | Color sensor-based device for detecting stoving strength through automatic titration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420204512.5U CN203824918U (en) | 2014-04-24 | 2014-04-24 | Color sensor-based device for detecting stoving strength through automatic titration |
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| Publication Number | Publication Date |
|---|---|
| CN203824918U true CN203824918U (en) | 2014-09-10 |
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|---|---|---|---|
| CN201420204512.5U Withdrawn - After Issue CN203824918U (en) | 2014-04-24 | 2014-04-24 | Color sensor-based device for detecting stoving strength through automatic titration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969256A (en) * | 2014-04-24 | 2014-08-06 | 华南理工大学 | Color-sensor-based device for detecting intensity of stoving |
-
2014
- 2014-04-24 CN CN201420204512.5U patent/CN203824918U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969256A (en) * | 2014-04-24 | 2014-08-06 | 华南理工大学 | Color-sensor-based device for detecting intensity of stoving |
| CN103969256B (en) * | 2014-04-24 | 2016-06-22 | 华南理工大学 | A kind of device detecting intensity of sulfitation based on color sensor automatic Titration |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140910 Effective date of abandoning: 20160622 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |