CN202256238U - Portable edible oil quality detection device - Google Patents
Portable edible oil quality detection device Download PDFInfo
- Publication number
- CN202256238U CN202256238U CN2011203087738U CN201120308773U CN202256238U CN 202256238 U CN202256238 U CN 202256238U CN 2011203087738 U CN2011203087738 U CN 2011203087738U CN 201120308773 U CN201120308773 U CN 201120308773U CN 202256238 U CN202256238 U CN 202256238U
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- China
- Prior art keywords
- circuit
- edible oil
- capacitance
- chip
- capacitance measurement
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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 - Fee Related
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- 239000008157 edible vegetable oil Substances 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000003750 conditioning effect Effects 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 3
- 239000004020 conductor Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 abstract description 3
- 210000000078 claw Anatomy 0.000 abstract 1
- 238000012797 qualification Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A portable edible oil quality detection device is a quick electronic detection device for judging the qualification of edible oil by detecting the dielectric constant variation of the edible oil, and comprises a power management system, a single chip microcomputer, a claw-type capacitance sensor, a signal conditioning circuit and a PS021 capacitance measuring circuit, wherein the claw-type capacitance sensor comprises a large cylinder positioned in the center, and the large cylinder is used as one electrode of a capacitor and four small cylinders at the periphery and is connected by leads to be used as the other electrode. According to claw capacitor capacitance formula
Through internal conversion of the chip, the required capacitance value can be obtained through setting the internal register of the PS021, the capacitance value is read out by the singlechip, is calculated, is compared with a set threshold value for judgment, and is displayed through the liquid crystal display. The power management system provides power for each circuit module, and has the advantages of low power consumption, small volume, low price, high measurement precision, portability, no chemical pollution and the like.
Description
Technical fieldThe utility model relates to a kind of electronic installation, and particularly a kind of portable edible oil quality detection device is suitable for food quality supervision department, and dining room food purchasing department of unit and eating at home oil detect.
Background technologyEdible oil is the important source material in the food processing process, and along with the frequent appearance of various places hogwash fat incident report in recent years, people deepen the harm understanding of hogwash fat day by day, and the quality of edible oil is more and more paid attention to.People hope to study a kind of easy, easy detection method of going, and can grasp the quality of edible oil fast and accurately.At present, in China's edible oil national standard chemical method is generally adopted in quality testing, not only there is certain problem of environmental pollution in its method; Also existing needs the operation by the professional, and detection time is long, and process is loaded down with trivial details; Instrument and equipment is expensive, and expense is high, is difficult to realize on-the-spot deficiencies such as detection.
Summary of the inventionThe purpose of the utility model is to provide a kind of portable edible oil quality detection device, and it is the physical detection device of a kind of measured object electric capacity microvariations.
Solve the technical scheme of the utility model technical matters: the utility model comprises power-supply management system, single-chip microcomputer, pawl formula capacitive transducer, signal conditioning circuit and PS021 capacitance measurement circuit; Three output terminals of power-supply management system link with an input end of signal conditioning circuit, PS021 capacitance measurement circuit, single-chip microcomputer respectively; An output terminal of pawl formula capacitive transducer and an input end of signal conditioning circuit link, and the input/output terminal of signal conditioning circuit, PS021 capacitance measurement circuit and single-chip microcomputer is in sequential series in demonstration; The center section of said capacitive transducer is the electrode of the radius cylindrical conductor that is R=5mm as capacitor; Around it is the small column conductor that four radiuses are r=2mm; They link to each other as another electrode with lead; All right cylinder length are L=15mm, and the center of cylindrical conductor and the center of cylindrical conductor are d=10mm apart.According to pawl formula condenser capacitance formula
; Internal conversion through chip; Through setting to the PS021 internal register; Obtain needed capacitance, read, and calculate by single-chip microcomputer; Relatively judge with the threshold values of setting; Show that through liquid crystal display power-supply management system is for each circuit module provides power supply, be to be provided with in the utility model one based on the capacitance measurement circuit of PS021 chip and one based on the capacitance measurement circuit of PS021 chip and the combinational circuit of capacitive transducer.
The utlity model has that power consumption is little, volume is little, low price, measuring accuracy is high, portable and do not have advantages such as chemical contamination.
Description of drawings
Fig. 1 is that the utility model circuit working schematic diagram Fig. 2 is the utility model capacitor sensor structural representation.
EmbodimentReferring to Fig. 1 and Fig. 2; The utility model comprises power-supply management system 1, single-chip microcomputer 5, pawl formula capacitive transducer 2, signal conditioning circuit 3 and PS021 capacitance measurement circuit 4; Three output terminals of power-supply management system 1 link with an input end of signal conditioning circuit 3, PS021 capacitance measurement circuit 4 respectively; An output terminal of pawl formula capacitive transducer 2 and an input end of signal conditioning circuit 3 link, and an output terminal of signal conditioning circuit 3 and PS021 capacitance measurement circuit 4 is in sequential series in an input end of single-chip microcomputer 5; The center section of said capacitive transducer is the cylindrical conductor 7 that a radius is R=5mm, as an electrode of capacitor, is the small column conductor 8 that four radiuses are r=2mm around it; They link to each other as another electrode with lead; All cylindrical conductor length are L=15mm, and the center of the center of cylindrical conductor 7 and cylindrical conductor 8 is at a distance of being d=10mm, and silica gel head 9 is fixed and the sealing insulating electrodes; What be attached thereto is shielded cable 10, connection terminal 11.According to pawl formula condenser capacitance formula
; Power-supply management system 1 provides power supply for each circuit module; The faint capacitance signal of pawl formula capacitive transducer 2 outputs, capacitance signal gets into PS021 capacitance measurement circuit 4 through signal conditioning circuit 3, through the internal conversion of chip; Through setting to the PS021 internal register; Can obtain needed capacitance, read by single-chip microcomputer 5, and calculate; Relatively judge with the threshold values of setting; Through showing that 6 show, be provided with a capacitance measurement circuit based on the PS021 chip in the utility model, one based on the capacitance measurement circuit of PS021 chip and the combinational circuit of capacitive transducer.
Claims (3)
1. portable edible oil quality detection device; Comprise power-supply management system (1), single-chip microcomputer (5), pawl formula capacitive transducer (2), signal conditioning circuit (3) and PS021 capacitance measurement circuit (4); Three output terminals of power-supply management system (1) link with an input end of signal conditioning circuit (3), PS021 capacitance measurement circuit (4), single-chip microcomputer (5) respectively; An output terminal of pawl formula capacitive transducer (2) and an input end of signal conditioning circuit (3) link; The input/output terminal of signal conditioning circuit (3), PS021 capacitance measurement circuit (4) and single-chip microcomputer (5) is in sequential series in showing (6); The center section that it is characterized in that said pawl formula capacitive transducer is the electrode of the radius cylindrical conductor (7) that is R=5mm as capacitor; Around it is the small column conductor (8) that four radiuses are r=2mm; They link to each other as another electrode with lead, and all right cylinder length are L=15mm, and the center of the center of cylindrical conductor (7) and cylindrical conductor (8) is d=10mm apart; According to pawl formula condenser capacitance formula
; Internal conversion through chip through the setting to the PS021 internal register, obtains needed capacitance; Read by single-chip microcomputer (5); And calculate, relatively judge with the threshold values of setting, show through liquid crystal display (6); Power-supply management system (1) is for each circuit module provides power supply, be to be provided with in the utility model one based on the capacitance measurement circuit of PS021 chip and one based on the capacitance measurement circuit of PS021 chip and the combinational circuit of pawl formula capacitive transducer.
2. a kind of portable edible oil quality detection device as claimed in claim 1 is characterized in that being provided with in the utility model a capacitance measurement circuit based on the PS021 chip.
3. a kind of portable edible oil quality detection device as claimed in claim 1 is characterized in that being provided with one based on the capacitance measurement circuit of PS021 chip and the combinational circuit of capacitive transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203087738U CN202256238U (en) | 2011-08-24 | 2011-08-24 | Portable edible oil quality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203087738U CN202256238U (en) | 2011-08-24 | 2011-08-24 | Portable edible oil quality detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256238U true CN202256238U (en) | 2012-05-30 |
Family
ID=46117460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203087738U Expired - Fee Related CN202256238U (en) | 2011-08-24 | 2011-08-24 | Portable edible oil quality detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256238U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823806A (en) * | 2016-05-17 | 2016-08-03 | 淮北师范大学 | Portable edible oil detecting device |
| CN106461711A (en) * | 2014-03-17 | 2017-02-22 | 麦格纳覆盖件有限公司 | Method and system for driving a capacitive sensor |
-
2011
- 2011-08-24 CN CN2011203087738U patent/CN202256238U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106461711A (en) * | 2014-03-17 | 2017-02-22 | 麦格纳覆盖件有限公司 | Method and system for driving a capacitive sensor |
| CN105823806A (en) * | 2016-05-17 | 2016-08-03 | 淮北师范大学 | Portable edible oil detecting device |
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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: 20120530 Termination date: 20130824 |