CN201984037U - Titration end-point determination device for determining fatty acid value in grain - Google Patents
Titration end-point determination device for determining fatty acid value in grain Download PDFInfo
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- CN201984037U CN201984037U CN 201120049645 CN201120049645U CN201984037U CN 201984037 U CN201984037 U CN 201984037U CN 201120049645 CN201120049645 CN 201120049645 CN 201120049645 U CN201120049645 U CN 201120049645U CN 201984037 U CN201984037 U CN 201984037U
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- fatty acid
- light source
- acid value
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Abstract
The utility model relates to a titration end-point determination device for determining a fatty acid value in grain, which comprises a shell body, a titration tube, a titration cup, a magnetic stirrer, a stirrer, a light source and a light sensing element, and is characterized by also comprising a constant current source circuit and a single-chip microcomputer; the light source is connected with the constant current source circuit, and the light sensing element is connected with the single-chip microcomputer; the shell body is a rectangular body in which a cylindrical through hole is arranged; the titration cup is a transparent cylindrical glass cup which is arranged in the shell body; the light source is a high-power white light light-emitting diode (LED); the light sensing element is a color sensor; and the LED and the color sensor are arranged on the inner wall of the shell body at intervals in 90 degrees. Compared with the prior art, the titration end-point determination device for determining fatty acid value in grain has the advantages that: the high-power white light LED is adopted as the light source, so that no measuring darkroom needs to be set; the color sensor is adopted to detect the color of solution, and the single-chip microcomputer automatically determines a titration end-point; and the device has a simple structure and low cost, can be used together with manual titration, and is convenient to popularize.
Description
Technical field
The utility model relates to a kind of titration end-point decision maker, specifically a kind of titration end-point decision maker that is used for grain fatty acid value mensuration.
Background technology
Grain is in storage, and its quality is not good at and is changed with storage time or keeping, becomes grain in storage for years gradually by new grain, and China's grain storage quality index (should deposit, slightly should not deposit, severe should not deposit) mainly is to judge according to fatty acid value.Existing standard GB/T20569-2006, GB/T 20570-2006 (in November, 2006 issue) regulation, fatty acid value is with " in and in the 100g dry sample the free required potassium hydroxide milligram of fatty acid number " expression, its assay method is as follows: 1. pulverize sample, extract fatty acid with absolute ethyl alcohol, obtain extract; 2. add phenolphthalein indicator to extract, splash into the potassium hydroxide standard solution by buret, titration is terminal point to being " blush "; 3. calculate fatty acid value according to the potassium hydroxide standard solution milliliter number that splashes into etc.State on the implementation in the titration process, because " blush " is a fuzzy color, there is subjectivity in judgement to the operator to titration end-point, and the fatty acid value that causes same sample different people to be measured often there are differences, and judges to storage quality and brings difficulty.For many years, China's grain stores industry and competent authorities all wish to revise national standard, adopts instrument to " blush " objective judgement, but does not still have the examination by national standardization management committee of a kind of instrument and method so far.
On June 22nd, 2005, Chinese patent discloses the utility model patent (ZL 200420034691.9) that a name is called " grain fatty acid value analyzer ", feature is: " light emitting diode and photodiode composition straight penetrate type optical sensor are set respectively on relative two side, measurement darkroom ", photodiode is connected with the PC microprocessing systems, judges titration end-point according to photocurrent variations.Its weak point is, (corn is golden yellow to the extract color difference of different cultivars grain, paddy is milky), with the extract color of kind different batches grain also difference slightly, be transmitted to the light intensity difference on the photodiode, its photocurrent and variation are different, and titration end-point is difficult for judging accurately.
On November 8th, 2006, Chinese patent discloses the utility model patent (ZL 200520036267.2) that a name is called " terminal point determining of multi-functional titrator and self-measuring device ", feature is: " imageing sensor is arranged on the sidewall of measuring the darkroom and is positioned at the titration cup next door, and imageing sensor is connected with data processing equipment ".Its weak point is that imageing sensor adopts colour photometer or CCD or cmos image sensor, installation cost height, data processing software complexity.
Summary of the invention
The purpose of this utility model is to solve during relevant grain fatty acid value is measured in the background technology titration end-point to judge the problem that exists, and a kind of device that can accurately judge titration end-point in the grain fatty acid value mensuration process is provided.
The utility model is achieved in that a kind of automatic decision maker of titration end-point that the grain fatty acid value is measured that is used for, comprise housing, buret, titration cup, magnetic stirring apparatus, stirrer, light source, photo-sensitive cell, it is characterized in that: also comprise constant-current source circuit, single-chip microcomputer, described light source is connected with constant-current source circuit; Described photo-sensitive cell is connected with single-chip microcomputer; Housing is the rectangular parallelepiped that includes cylindrical hole; Light source, photo-sensitive cell are placed on the housing internal perisporium, lay highly identical, light source is vertical to the line in the center of circle with photo-sensitive cell to the line in the center of circle.
Light source described in the utility model is 2 large power white light LEDs; Described photo-sensitive cell is the inner color sensor that is integrated with photodiode and redness, green, blue 3 kinds of optical filters; Described titration cup is a transparent column shape glass cylinder; Described single-chip microcomputer is connected with phonation circuit.
Buret described in the utility model is placed on the titration cup top; Described titration cup holds detected solution and is placed in the housing; Housing and titration cup are placed on the magnetic stirring apparatus; Described stirrer is placed in the detected solution.
The technical solution adopted in the utility model principle: according to the colorimetry principle, the shades of colour of occurring in nature can mix formation by a certain percentage with three kinds of colors of red, green, blue (three primary colours), if detect the three primary colours light intensity of light, just knows the color of light.Color sensor is exactly this photoelectric device that can survey the three primary colours light intensity of light.In titration process, large power white light LED sends stable white light, and by the solution in the glass irradiation titration cup, not before point of neutralization, it is acid that solution is, and color is constant, and its three primary colours light intensity is all constant; After titration arrived point of neutralization, solution was alkalescent, because the effect of phenolphthalein indicator, it is little red that solution colour becomes, its three primary colours light intensity all changes, and single-chip microcomputer changes by the red, green, blue three primary colours light intensity that color sensor collects in real time, judges exactly " blush ".
The utility model compared with prior art, advantage is:
(1) adopting large power white light LED is light source, does not need to be provided with the measurement darkroom.
(2) adopt color sensor to survey solution colour, judge titration end-point automatically by single-chip microcomputer, titration end-point is judged accurately.
(3) apparatus structure is simple, with low cost, can help popularizing with manual titration's use that matches.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is housing of the present utility model and titration cup part front view (analysing and observe).
Fig. 3 is housing of the present utility model and titration cup part A-A sectional view.
Fig. 4 is light source of the present utility model and constant-current source circuit connecting circuit figure.
Fig. 5 is photo-sensitive cell of the present utility model and single-chip microcomputer connecting circuit figure.
Among Fig. 1～Fig. 3: 1. housing; 2. buret; 3. titration cup; 4. magnetic stirring apparatus; 5. stirrer;
6. light source; 7. photo-sensitive cell; 8. detected solution
Embodiment
Below in conjunction with description of drawings of the present utility model one preferred embodiment.
As Fig. 1～shown in Figure 3: a kind ofly be used for the automatic decision maker of titration end-point that the grain fatty acid value is measured, comprise: housing 1, buret 2, titration cup 3, magnetic stirring apparatus 4, stirrer 5, light source 6, photo-sensitive cell 7.
Described titration cup 3 adopts specification 100mL clear glass beaker.
Described housing 1 can be selected rectangular parallelepiped opaque plastics processing and fabricating for use for including the rectangular parallelepiped of cylindrical hole, and internal diameter of cylindrical hole is greater than the external diameter 2mm of titration cup 3 in the middle of it.
Described light source 6 adopts the large power white light LED of 2 colour temperature 5500～6500K, dissipated power 1W, is placed in relatively on housing 1 wall; Described photo-sensitive cell 7 adopts color sensor, and model adopts TCS3200, and the height that is placed on housing 1 wall is identical with LED, and it is vertical to the line in the center of circle with LED to the line in the center of circle to satisfy color sensor.
Among Fig. 4, D1, D2 are 2 large power white light LEDs, and U1 is three-terminal voltage regulator LM317, and R1 is 3.9 Ω resistance, and the steady current of supplying with LED is 320mA.
Among Fig. 5, U2 is the TCS3200 color sensor, and it is integrated with 64 photodiodes on one chip, is divided into 4 groups, wherein 3 groups respectively redly, green, blue color filter, can detect the three primary colours light intensity of light, export with square wave frequency.U3 is the 89C51 single-chip microcomputer, and 12,13 pins of U3 connect with 7,8 (S2, S3) pin of U2 respectively, is used for the single-chip microcomputer timesharing and selects color; 14 (T0) pin of U3 connects with 6 (OUT) pin of U2, is used for the square wave that single-chip microcomputer receives TCS3200 output.
Among Fig. 5, R2 is a 1k Ω resistance, and U4 is the NPN triode, and U5 is a hummer, after being used for titration end-point and arriving, to user's sounding sound information.
Use operation steps of the present utility model is as follows:
(1) housing 1 that will place light source 6, photo-sensitive cell 7 is placed on the magnetic stirring apparatus 4; The titration cup 3 that fills detected solution 8 is put into housing 1 (on the magnetic stirring apparatus 4), stirrer 5 is put into titration cup 3;
(2) energized makes large power white light LED send solution 8 in the stable white light titration cup 3, and stirrer 5 rotates stirring in solution, and single-chip microcomputer begins to gather color data;
(3) manually constantly splash into the potassium hydroxide standard solution by buret 2 (or passing through volume pump) in titration cup 3, after titration arrived point of neutralization, single-chip microcomputer determined titration end-point automatically, and made the hummer prompting of sounding, and the user can finish titration.
Claims (4)
1. one kind is used for the automatic decision maker of titration end-point that the grain fatty acid value is measured, comprise housing (1), buret (2), titration cup (3), magnetic stirring apparatus (4), stirrer (5), light source (6), photo-sensitive cell (7), it is characterized in that: also comprise constant-current source circuit, single-chip microcomputer; Described light source (6) is connected with constant-current source circuit; Described photo-sensitive cell (7) is connected with single-chip microcomputer; Housing (1) is for including the rectangular parallelepiped of cylindrical hole; Light source (6), photo-sensitive cell (7) are placed on housing (1) wall, lay highly identical and light source (6) vertical to the line in the center of circle to the line in the center of circle with photo-sensitive cell (7).
2. the automatic decision maker of titration end-point that is used for grain fatty acid value mensuration according to claim 1, it is characterized in that: described light source (6) is 2 large power white light LEDs.
3. according to claim 1ly be used for the automatic decision maker of titration end-point that the grain fatty acid value is measured, it is characterized in that: described photo-sensitive cell (7) is the inner color sensor that is integrated with photodiode and redness, green, blue 3 kinds of optical filters.
4. the automatic decision maker of titration end-point that is used for grain fatty acid value mensuration according to claim 1, it is characterized in that: described single-chip microcomputer is connected with phonation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120049645 CN201984037U (en) | 2011-02-28 | 2011-02-28 | Titration end-point determination device for determining fatty acid value in grain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120049645 CN201984037U (en) | 2011-02-28 | 2011-02-28 | Titration end-point determination device for determining fatty acid value in grain |
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| Publication Number | Publication Date |
|---|---|
| CN201984037U true CN201984037U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120049645 Expired - Fee Related CN201984037U (en) | 2011-02-28 | 2011-02-28 | Titration end-point determination device for determining fatty acid value in grain |
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| Country | Link |
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| CN (1) | CN201984037U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103089A (en) * | 2011-02-28 | 2011-06-22 | 南京财经大学 | Titration end point determination device for determining fatty acid value of grain |
| CN103439455A (en) * | 2013-09-25 | 2013-12-11 | 广州市酒类检测中心 | Blending device used in direct titration detection method |
-
2011
- 2011-02-28 CN CN 201120049645 patent/CN201984037U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103089A (en) * | 2011-02-28 | 2011-06-22 | 南京财经大学 | Titration end point determination device for determining fatty acid value of grain |
| CN102103089B (en) * | 2011-02-28 | 2013-06-12 | 南京财经大学 | Titration end point determination device for determining fatty acid value of grain |
| CN103439455A (en) * | 2013-09-25 | 2013-12-11 | 广州市酒类检测中心 | Blending device used in direct titration detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20140228 |