CN2058491U - Testing device for fresh milk concentration - Google Patents
Testing device for fresh milk concentration Download PDFInfo
- Publication number
- CN2058491U CN2058491U CN 89214101 CN89214101U CN2058491U CN 2058491 U CN2058491 U CN 2058491U CN 89214101 CN89214101 CN 89214101 CN 89214101 U CN89214101 U CN 89214101U CN 2058491 U CN2058491 U CN 2058491U
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- CN
- China
- Prior art keywords
- fresh milk
- concentration
- infrared light
- milk concentration
- light
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- 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.)
- Expired - Lifetime
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model belongs to a testing device for fresh milk concentration, belonging to an optical instrument for testing or analyzing materials. The utility model is especially suitable for the measurement of fresh milk concentration, comprising a concentration sensor, a sampling circuit, an amplification circuit, and a display, wherein, the concentration sensor is composed of a near infrared light source, a narrowband filter, a testing container, and a permeation light sensor. The utility model can accurately measure the fresh milk concentration, and can also accurately measure the fat concentration of the fresh milk, having the advantages of simple structure, convenient and flexible operation, high measuring speed, light weight, portability, and convenience for field operation, and is suitable for collecting fresh milk and is suitable for dairies.
Description
The utility model belongs to a kind of instrument that utilizes optical instrument test or analysis of material, is particularly suitable for detecting fresh milk concentration.
CN 2031928U discloses a kind of " fresh milk concentration high speed tester ", and it utilizes scalding light irradiation fresh milk, the concentration of testing fresh milk through opto-electronic conversion, this testing tool stable performance, easy to maintenance, cost is lower.But because the fat in the milk liquid has stronger absorption to infrared light, and follow in law of Beer.Therefore, adopt scalding lamp transmission fresh milk, for fat in the fresh milk with mingle (as mixing starch), be difficult for accurately test.
The purpose of this utility model be to address the above problem provide a kind of easy to operate, test fresh milk concentration is accurate, and can accurately test the fresh milk concentration detector of fat content in the fresh milk.
The utility model is made up of concentration sensor, sample circuit, amplifying circuit and display, concentration sensor is by near-infrared light source, narrowband light filter, test container and see through the light perception device and form, the infrared light that sends by near-infrared light source, by narrowband light filter transmission test container, convert electric signal to by seeing through the reception of light perception device, electric signal amplifies through sample circuit detection, amplifying circuit, shows through display.
The utility model is simple in structure, flexible operation, detection speed are fast, in light weight, be easy to carry and field operation, is suitable for purchasing fresh milk and Milk Products Plant and uses.
Fig. 1 is the utility model concentration sensor structural representation
Fig. 2 is the utility model embodiment 1 structural representation
Fig. 3 is the utility model embodiment 2 circuit diagrams
Below in conjunction with accompanying drawing the utility model is described in detail.
As shown in Figure 1, concentration sensor by near-infrared light source 1, narrowband light filter 2, test container 3, see through light perception device 4 and form.The infrared light that near-infrared light source 1 sends after narrowband light filter 2 is handled, sees through the fresh milk of 3 li of test containers, is converted to electric signal by seeing through 4 receptions of light perception device.Test container can be made box-like, puts fresh milk into wherein test.Also can make, and have spillway 7 at its top by optical glass.With near-infrared light source, narrowband light filter, see through the light perception device and be fixed on the outside of test container with resin 5, be equipped with shell 6 in its periphery, sensor is easy to use flexible like this.During use concentration sensor is inserted in the tested fresh milk, fresh milk enters test container along the direction of arrow, and fresh milk concentration is tested rapidly.In order more accurately to test fatty consistency in the fresh milk, the best wavelength of the infrared light that near-infrared light source sends is 918～935nm, and peak value is at 925nm.
Fig. 2 is embodiment 1.As shown in Figure 2, seeing through the light perception device is connected in parallel on by resistance R
2～R
4And R.On the symmetric arms of the Wheatstone bridge of forming, after infrared light is by homogeneous milk liquid in the test container, the light intensity that is received through the light perception device changes with fat content is different in the milk liquid, make the electric bridge of original balance produce corresponding small voltage output with milk liquid fat content difference, after amplifying circuit 1 amplifies and handles, by display 2 display result.
Fig. 3 is embodiment 2.As shown in Figure 3, in order to improve this Instrument measuring precision, power supply after the voltage stabilizing (9v) is via the mu balanced circuit secondary voltage stabilizing of compositions such as 78L05, drive near-infrared light source and send infrared light, infrared light passes through test container, be converted to electric signal by seeing through the reception of light perception device, see through the light perception device and be attempted by operational amplifier A
1The R of feedback resistance
4On, through sampling, by operational amplifier A
2Amplify, show fresh milk concentration by gauge outfit.In the present embodiment, in order to adapt to the requirement of amplifier symmetry power supply, eliminate the influence of power supply, by operational amplifier A to measuring accuracy
2, resistance R
6, R
7Constitute active voltage divider, its positive-negative power is from same battery, resistance R
6, R
7Constitute high resistant joint voltage divider, to keep R
6, and R
7The current potential unanimity of junction.For variation, especially under the asymmetrically placed load current conditions, has good adaptive ability from the earth potential load current.
Claims (5)
1. fresh milk concentration detector, it is made up of concentration sensor, sample circuit, amplifying circuit and display, it is characterized in that concentration sensor is by near-infrared light source, narrowband light filter, test container with see through the light perception device and form, the infrared light that sends by near-infrared light source, by narrowband light filter transmission test container, convert electric signal to by seeing through the reception of light perception device, electric signal amplifies through sample circuit detection, amplifying circuit, shows through display.
2. fresh milk concentration detector according to claim 1 is characterized in that test container is the optical glass container, has spillway at its top.
3. fresh milk concentration detector according to claim 1 is characterized in that infrared light wavelength is preferably 910～935nm, and peak value is 925nm.
4. according to the described fresh milk concentration detector of one of claim 1～3, it is characterized in that sample circuit constitutes by the feedback resistance of operational amplifier with through the light perception device, sees through the light perception device and is connected in parallel on the feedback resistance.
5. fresh milk concentration detector according to claim 4 is characterized in that being provided with by operational amplifier A between the operational amplifier in power supply and amplifying circuit
2, resistance R
6, R
7Form active voltage divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89214101 CN2058491U (en) | 1989-07-10 | 1989-07-10 | Testing device for fresh milk concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89214101 CN2058491U (en) | 1989-07-10 | 1989-07-10 | Testing device for fresh milk concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2058491U true CN2058491U (en) | 1990-06-20 |
Family
ID=4869950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89214101 Expired - Lifetime CN2058491U (en) | 1989-07-10 | 1989-07-10 | Testing device for fresh milk concentration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2058491U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458405C (en) * | 2001-11-08 | 2009-02-04 | S.A.E.埃菲金计算机化乳业管理*** | Spectroscopic fluid analyzer |
| CN104771324A (en) * | 2015-03-13 | 2015-07-15 | 东莞捷荣技术股份有限公司 | Correlative-structure-based intelligent milk bottle sleeve capable of distinguishing liquids in milk bottle and method for intelligent milk bottle sleeve to distinguish liquids in milk bottle |
| CN107703130A (en) * | 2017-09-19 | 2018-02-16 | 淮海工学院 | Suitable for the acetes chinensis method for the beta lactamase for detecting Residues in Milk |
| CN108572153A (en) * | 2017-03-07 | 2018-09-25 | 泰安市康宇医疗器械有限公司 | A kind of portable breast milk analyser |
-
1989
- 1989-07-10 CN CN 89214101 patent/CN2058491U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458405C (en) * | 2001-11-08 | 2009-02-04 | S.A.E.埃菲金计算机化乳业管理*** | Spectroscopic fluid analyzer |
| CN104771324A (en) * | 2015-03-13 | 2015-07-15 | 东莞捷荣技术股份有限公司 | Correlative-structure-based intelligent milk bottle sleeve capable of distinguishing liquids in milk bottle and method for intelligent milk bottle sleeve to distinguish liquids in milk bottle |
| CN108572153A (en) * | 2017-03-07 | 2018-09-25 | 泰安市康宇医疗器械有限公司 | A kind of portable breast milk analyser |
| CN107703130A (en) * | 2017-09-19 | 2018-02-16 | 淮海工学院 | Suitable for the acetes chinensis method for the beta lactamase for detecting Residues in Milk |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |