CN103196959A - Device for detecting oil or grease quality - Google Patents
Device for detecting oil or grease quality Download PDFInfo
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- CN103196959A CN103196959A CN2013101223341A CN201310122334A CN103196959A CN 103196959 A CN103196959 A CN 103196959A CN 2013101223341 A CN2013101223341 A CN 2013101223341A CN 201310122334 A CN201310122334 A CN 201310122334A CN 103196959 A CN103196959 A CN 103196959A
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- oil
- fat
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Abstract
The invention relates to a device for detecting oil or grease quality. The device comprises a casing for connecting and protecting, a supporting piece, an analysis circuit and a display circuit, wherein the supporting piece is installed on an inclined plane of a first end in the length direction of the casing for connecting and protecting and is used for supporting a sensor for measuring electrical characteristics of oil or grease; the analysis circuit is installed on a second end opposite to the first end in the length direction of the casing for connecting and protecting and is used for receiving measured data from the sensor and outputting measured values; and the display circuit is connected with the analysis circuit and is used for displaying the measured values. Compared with the existing similar devices, the device has the advantages that the structure and the manufacturing of the device are simpler, the device is easy to clean, and the device can effectively prevent oil from infiltrating into the interior of the device.
Description
Technical field
The present invention relates to the food quality detection range, particularly, relate to a kind of device of the quality for detection of oil or fat.
Background technology
Fried food is popular to people deeply remarkably because of its mouthfeel.Yet, in the frying process, oil will stand long 180 celsius temperatures heating, and ingress of air and water inevitably, thereby can produce some new compositions, comprise acrylamide, polymkeric substance, atomic group, free fatty acid, polar compound etc., and known some of them become branch to cause serious health problem, as cause diseases such as hypertension, heart disease and diabetes, especially all the more so after oil has used its quality of a period of time to take place obviously to descend.Therefore, be necessary to monitor the quality of frying oil, so that quality takes place to be changed when obviously descending after it uses a period of time, avoid causing health threat.
The quality badness of oil can pass through color, smell, the stickiness of oil, and the chemical change that causes owing to its total polar compound increase waits to characterize.The increase of total polar compound of oil is that oxidation, polymerization, the hydrolytic process by polar material causes, and it comprises that correspondingly products such as oxidation product, diglyceride, free fatty acid form.According to document " with the variation of quality in use of specific inductive capacity method detection edible oil " (Chen Weizong, food industry science and technology, Vol.20, No.3,1999), total the polar compound level that chemical method is measured is on all four with the variation of oily service time and the variation of the specific inductive capacity that physical method is measured.In practice, can use approximate linear TPC=k
1* ε+TPC0 carries out the calculating between total polar compound level percentage of specific inductive capacity and oil or fat, wherein, TPC is the instant TPC that calculates gained, and TPC0 is initial total polar compound level of tested oil or fat, ε is tested oil or the instant specific inductive capacity of fat, k
1Be constant, it can be determined by the value of measuring several groups of TPC and ε.Thereby the increase of the total polar compound level in oil or the fat is followed the trail of in the increase of specific inductive capacity that can be by monitoring oil or fat.And the variation of the specific inductive capacity of oil or fat can detect by the changes in capacitance of relative checkout equipment.
Current, a kind of detection method is to use capacitive sensor, its end that is installed in a rod is immersed deep fat carry out detection.Particularly, this capacitive sensor generally adopts interdigitated capacitors.As document " Capacitive Interdigital Sensor with Inhomogenous Nematic Liquid Crystal Film " (A.S.Abu-Abed and R.G.Lindquist, Progress in Electromagnetics Research B, Vol.7,75-87,2008) described in, the specific inductive capacity of establishing measured oil or fat is ε
kCan derive, when using interdigitated capacitors to measure this oil or fat, because of the relevant physical dimension of interdigitated capacitors (as each interdigital width and interdigital between distance) etc. all invariable, so the integral capacitor of this interdigitated capacitors only with the DIELECTRIC CONSTANT of measured oil or fat
kBe directly proportional, can know this ε so record the integral capacitor of this interdigitated capacitors
kFor example; be 200920150843.4 in the patent No.; name is called the device that discloses a kind of state for detection of oil or fat in the Chinese patent of " for detection of the device of the state of oil or fat "; this device has a housing; one is fixed on hollow web member and on this housing is installed in supporting member on the opposed end of web member; this supporting member is used for holding detecting the interdigitated capacitors of the specific inductive capacity of oil or fat; wherein supporting member has a front; one and this front opposing backside surface and four sides; wherein sensor is arranged on the front of supporting member and by at least one electrical lead and is connected with an analytical electron device; this analytical electron device be arranged in the zone of housing and/or web member in the zone of the end of housing; wherein, supporting member is arranged on one and covers at least in the protection housing of the back side and each side and can be by the front openings proximity transducer in the protection housing.Yet; there is following shortcoming in this design: because its web member and protection housing are as two parts and being joined together independently; and this need weld or technology such as bonding, thereby causes its manufacturing process comparatively complicated, and exists oil to infiltrate the risk of device interior.Simultaneously, because the supporting member of sensor is to install in the mode of level, this also causes the structure of this pick-up unit too complicated.
Therefore, need the device of a kind of novel quality for detection of oil or fat of exploitation, its structure is relative with manufacturing process simple, the reliability height, and cleaning easily, and can avoid oil to penetrate into its inside effectively.
Summary of the invention
In order to solve at least one the problems referred to above, the invention provides a kind of device of the quality for detection of oil or fat.
According to an aspect of the present invention, this oil or fat Quality Detection device comprise: connect and the protection housing; Supporting member, it is installed in and is positioned at described connection and protects on the inclined-plane of using first end on the length direction of housing, and its back side contacts described inclined-plane; Be used for the sensor of the electrical characteristics of measurement oil or fat, be arranged on the front of described supporting member; Analysis circuit, it is installed in described connection and protection with on the length direction of housing and the described first end second opposed end, is used for receiving, analyzes from the electrical characteristics data of described sensor and export corresponding measured value; And display circuit, it is connected with described analysis circuit, is used for showing described measured value.
Preferably, described sensor for the electrical characteristics of measuring oil or fat is capacitor.
Preferably, described capacitor is inter-digital capacitor.
Preferably, described connection is made of metal with housing with protection, and its main part is the metal tube of hollow, is used for holding the electrical lead that connects described sensor and described analysis circuit.
Preferably, described inclined-plane processes by metal cutting, and it becomes the angle of spending less than 90 with described the connection with protecting the symmetrical axle center with housing.
Preferably, have a face opening on the described inclined-plane, the size of this face opening and the degree of depth make described supporting member to be embedded, and described supporting member passes through this face opening near tested oil or fat.
Preferably, described supporting member is made by pottery.
Preferably, be provided with the sealant of being formed by rubber-like organosilicon cementing agent between described supporting member and described opening, and described sealant is mutually concordant with the front of described inclined-plane and described supporting member.
Preferably, the electrical characteristics of described oil or fat comprise the specific inductive capacity of described oil or fat, and described measured value comprises total polar compound level of described oil or fat.
Preferably, be coated with the protective seam of being made up of inorganic oxide on the surface of described sensor, the thickness of this protective seam is between 1 μ m and 10 μ m.
Preferably, the back side of described supporting member also is provided with temperature sensor, is used for measuring the temperature of oil or fat, in order to the dielectric constant measurement data of described sensor are compensated.
Description of drawings
From subsequently by reference to the accompanying drawings the description to embodiment, these and/or other aspect of the present invention and advantage will become apparent and be more readily understood, wherein:
Fig. 1 is the explosive view of oil of the present invention or fat Quality Detection device;
Fig. 2 a is the front elevation of oil of the present invention or fat Quality Detection device;
Fig. 2 b is for seeing the longitudinal section of gained from right to left according to the profile line among Fig. 2 a
Fig. 3 is the vertical view of an end of the sensor that the electrical characteristics of measuring oil or fat are installed of oil of the present invention or fat pick-up unit;
Fig. 4 is according to the longitudinal section of the profile line among Fig. 3 from back eyes front gained;
Fig. 5 is the vertical view at the back side of supporting member of the sensor of the electrical characteristics of measuring oil or fat for supporting of the present invention.
Embodiment
Below, the specific embodiment of the present invention will be described, those of ordinary skill in the art can understand structure of the present invention, advantage and effect by the content that discloses in following examples.
Below with reference to the drawings and the specific embodiments the present invention is further specified.
Fig. 1 is the explosive view of oil of the present invention or fat Quality Detection device.As shown in Figure 1, comprise according to oil of the present invention or fat Quality Detection device: connect and protection housing 1, supporting member 2, sensor 14, analysis circuit 3, display circuit 6.Wherein, connect with protection and be made of metal with housing 1; its main part is that (this metal tube is preferably made with stainless steel for the metal tube of hollow; corrosion-resistant and be easy to clean); and be formed with an inclined-plane 11 (Fig. 4) in this connection with protecting the end with housing 1; be used for mounting support spare 2, this supporting member is used for holding the sensor 14 (Fig. 3) of the electrical characteristics of measuring oil or fat.According to an example of the present invention, this inclined-plane 11 processes by metal cutting, and it becomes 10 degree angles or other angles less than 90 degree with the symmetrical axle center of housing 1.The surfacing on this inclined-plane 11 can be avoided the residual of oil or fat, and is easy to clean.
Preferably, have a face opening 17 (Fig. 3) on this inclined-plane 11, its size is bigger slightly than the positive 2a of supporting member 2, and 2 side 2c are high slightly for its depth ratio supporting member, is convenient to supporting member 2 and embeds.After this supporting member 2 embedded this face opening 17, its positive 2a (Fig. 3) flushed with inclined-plane 11.In addition, as Fig. 1, Fig. 3 and shown in Figure 5, this connection can cover back side 2b and the side 2c thereof of supporting member 2 with protection with housing 1, and this supporting member 2 passes through face opening 17 on the inclined-plane 11 near tested oil or fat.This supporting member 2 is preferably made by pottery, and it has good temperature conduction and electrical insulating property.For preventing that oil or fat from entering this measurement mechanism inside, is provided with sealant 13 (Fig. 3) between supporting member 2 and face opening 17.Sealing layer 13 is mutually concordant with the front of inclined-plane 11 and supporting member 2, and this helps avoid the residual of oil or fat, and easy to clean.Sealing layer 13 for example can be made up of rubber-like organosilicon cementing agent.Except playing insulation and sealing function; sealing layer 13 is suitable for tolerating higher oil temperature; and can carry out temperature compensation with stainless the connection with protection with housing 1 to the supporting member 2 of pottery; avoid slit expansion between the two or dwindle the not driving fit that causes, thereby avoid making oil or fat to leak into this proving installation inside.
The sensor 14 that is used for the electrical characteristics of measurement oil or fat is preferably capacitor, to measure the specific inductive capacity of oil or fat.This specific inductive capacity can reflect the level of total polar compound of tested oil or fat.When the level of this total polar compound surpasses a predetermined threshold value, show that oil that this is tested or the quality of fat no longer are suitable for continuing to use, and need be replaced.Particularly, as shown in Figure 3, this sensor 14 is positioned on the positive 2a of supporting member 2, and it is inter-digital capacitor preferably, is formed by the copper etching that covers gold, and it is good to have anti-interference, measures stable advantage.
For protecting this sensor 14, be coated with protective seam 18 (Fig. 3) in its surface, this protective layer thickness is greater than 1 μ m and less than 10 μ m; inorganic oxide by for example silicon dioxide is formed; it has good insulation and higher mechanical hardness, and is corrosion-resistant, and is easy to clean.In addition, in actual measurement, because electric field only enters tested oil or fat certain depth, and tested oil or fat itself also insulate, thus this as thin as a wafer and nonconducting protective seam very little to the influence of dielectric constant measurement precision, can satisfy actual needs.
As shown in Figure 5, alternatively, the back side 2b of supporting member 2 also is provided with a temperature sensor 16, and it measures the temperature of oil or fat, to be used for that the dielectric constant measurement result is carried out adequate compensation.According to test result, there is following relation between the specific inductive capacity of temperature and oil or fat, namely along with temperature increases, the specific inductive capacity of oil or fat reduces.Accordingly, in practice, can be according to linear relationship ε
k=k
2* T+ ε
K0Its change in dielectric constant that causes because of oil or fat temperature rise is compensated, wherein, ε
kBe the instant specific inductive capacity of tested oil or fat, ε
K0Be the initial specific inductive capacity of tested oil or fat, T is the temperature of tested oil or fat, k
2Be constant, it can be by measuring several groups of T and ε
kValue determine.
On the other hand, as shown in Figure 1, connecting and protecting with on the length direction of housing 1, at the other end relative with an end at place, inclined-plane, be connected with analysis circuit 3 and display circuit 6.Wherein, by for example utilizing aforesaid linear relationship TPC=k
1* ε+TPC0, this analysis circuit 3 converts total polar compound level of this oil or fat with what receive to from the oil of sensor 14 or the specific inductive capacity of fat, and should total polar compound horizontal output show to display circuit 6.It is generally acknowledged, when total polar compound level of tested oil or fat surpasses 20%, namely no longer be suitable for using as edible oil.
In the present invention, sensor 14 is connected with analysis circuit 3 by electrical lead 12.Particularly; as shown in Figure 4 and Figure 5, electrical lead 12 1 ends are initial from the positive 2a of supporting member 2, and it passes supporting member 2 and arrives its back side 2b and become the other end; this other end passes face opening 17 and enters connection and the inner space 15 of protection with housing 1, and finally is connected with analysis circuit 3.This electrical lead 12 penetrates its back side 2b from the positive 2a of supporting member 2 and forms by technologies such as metallization via hole (not shown).Particularly, fill the inside of this via hole with the inorganics (as silicon dioxide or copper etc.) of solid, to prevent the seepage of oil or fat.
In addition, as shown in Figure 1, connecting and the side that be positioned at this analysis circuit 3 of protection with housing 1, handle portion is installed also, this handle portion constitutes (Fig. 1) by upper shell 4 and lower house 5.In this handle portion inside, except aforesaid analysis circuit 3 and display circuit 6, battery 7 (Fig. 2 b) is installed also, be used to the whole detection device power supply.Preferably, this handle portion can also arrange the wireless communication interface (not shown), is used for carrying out wireless connections with computing equipment such as computing machine, server, conveniently transmits data that pick-up unit records and it is stored and analyzes.Fixing by screw 10 between the each several part of this handle portion.On the upper shell 4 of handle portion, also be provided with button 8 input medias such as grade, be user-friendly for various operations.
Although illustrated and illustrated some embodiments of the present invention, it will be appreciated by the skilled addressee that under the situation that does not deviate from principle of the present invention and spirit, can these embodiment are changed.Protection scope of the present invention is limited by claims and their equivalent.
The Reference numeral table
1. connect and the protection housing
2. supporting member
2a. supporting member front
2b. the supporting member back side
2c. supporting member side
3. analysis circuit
4. upper shell
5. lower house
6. display circuit
7. battery
8. button
10. screw
11. inclined-plane
12. electrical lead
13. seal
14. sensor
15. connect and the inner space of protection with housing
16. temperature sensor
17. face opening
18. protective seam.
Claims (11)
1. device for detection of the quality of oil or fat, it comprises:
Connect and the protection housing;
Supporting member, it is installed in and is positioned at described connection and protects on the inclined-plane of using first end on the length direction of housing, and its back side contacts described inclined-plane;
Be used for the sensor of the electrical characteristics of measurement oil or fat, be arranged on the front of described supporting member;
Analysis circuit, it is installed in described connection and protection with on the length direction of housing and the described first end second opposed end, is used for receiving, analyzes from the electrical characteristics data of described sensor and export corresponding measured value; And
Display circuit, it is connected with described analysis circuit, is used for showing described measured value.
2. device according to claim 1 is characterized in that, described sensor for the electrical characteristics of measuring oil or fat is capacitor.
3. device according to claim 2 is characterized in that, described capacitor is inter-digital capacitor.
4. according to each described device among the claim 1-3, it is characterized in that described connection is made of metal with housing with protection, its main part is the metal tube of hollow, is used for holding the electrical lead that connects described sensor and described analysis circuit.
5. according to each described device among the claim 1-3, it is characterized in that described inclined-plane processes by metal cutting, it becomes the angle of spending less than 90 with described the connection with protecting the symmetrical axle center with housing.
6. device according to claim 5 is characterized in that, has a face opening on the described inclined-plane, and the size of this face opening and the degree of depth make described supporting member to be embedded, and described supporting member passes through this face opening near tested oil or fat.
7. according to each described device among the claim 1-3, it is characterized in that described supporting member is made by pottery.
8. device according to claim 6 is characterized in that, be provided with the sealant of being made up of rubber-like organosilicon cementing agent between described supporting member and described opening, and described sealant is mutually concordant with the front of described inclined-plane and described supporting member.
9. according to each described device among the claim 1-3, it is characterized in that the electrical characteristics of described oil or fat comprise the specific inductive capacity of described oil or fat, and described measured value comprises total polar compound level of described oil or fat.
10. according to each described device among the claim 1-3, it is characterized in that, be coated with the protective seam of being made up of inorganic oxide on the surface of described sensor, the thickness of this protective seam is between 1 μ m and 10 μ m.
11. device according to claim 9 is characterized in that, the back side of described supporting member also is provided with temperature sensor, is used for measuring the temperature of oil or fat, in order to the dielectric constant measurement data of described sensor are compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101223341A CN103196959A (en) | 2013-04-10 | 2013-04-10 | Device for detecting oil or grease quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101223341A CN103196959A (en) | 2013-04-10 | 2013-04-10 | Device for detecting oil or grease quality |
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| Publication Number | Publication Date |
|---|---|
| CN103196959A true CN103196959A (en) | 2013-07-10 |
Family
ID=48719651
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101223341A Pending CN103196959A (en) | 2013-04-10 | 2013-04-10 | Device for detecting oil or grease quality |
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| Country | Link |
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| CN (1) | CN103196959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494036A (en) * | 2018-09-21 | 2019-03-19 | 湖南福德电气有限公司 | A kind of production technology improving resistor insulation performance |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469521B1 (en) * | 1999-04-22 | 2002-10-22 | Ebro Electronic Gmbh & Co. Kg | Method for measuring the state of oils or fats |
| US20030155935A1 (en) * | 2001-12-28 | 2003-08-21 | Wolfgang Klun | Process and device for measuring the state of degradation of oils or fats |
| WO2005098407A1 (en) * | 2004-04-06 | 2005-10-20 | Testo Ag | Measuring device for measuring the state of oils or fats |
| WO2005098406A1 (en) * | 2004-04-06 | 2005-10-20 | Testo Ag | Measuring device which is used to measure the state of oils or fats |
| WO2005098419A1 (en) * | 2004-04-06 | 2005-10-20 | Testo Ag | Measuring device which is used to measure the state of oils or fats |
| CN201489054U (en) * | 2008-03-17 | 2010-05-26 | 特斯托股份公司 | Device for measuring state of oil or fat |
| CN101790680A (en) * | 2007-08-01 | 2010-07-28 | 特斯托股份公司 | Be used for device that the state of determinand, particularly oil or fat is measured |
| CN202837286U (en) * | 2012-10-15 | 2013-03-27 | 北京赛必达科技有限公司 | Edible oil quality detector |
-
2013
- 2013-04-10 CN CN2013101223341A patent/CN103196959A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469521B1 (en) * | 1999-04-22 | 2002-10-22 | Ebro Electronic Gmbh & Co. Kg | Method for measuring the state of oils or fats |
| US20030155935A1 (en) * | 2001-12-28 | 2003-08-21 | Wolfgang Klun | Process and device for measuring the state of degradation of oils or fats |
| WO2005098407A1 (en) * | 2004-04-06 | 2005-10-20 | Testo Ag | Measuring device for measuring the state of oils or fats |
| WO2005098406A1 (en) * | 2004-04-06 | 2005-10-20 | Testo Ag | Measuring device which is used to measure the state of oils or fats |
| WO2005098419A1 (en) * | 2004-04-06 | 2005-10-20 | Testo Ag | Measuring device which is used to measure the state of oils or fats |
| CN101790680A (en) * | 2007-08-01 | 2010-07-28 | 特斯托股份公司 | Be used for device that the state of determinand, particularly oil or fat is measured |
| CN201489054U (en) * | 2008-03-17 | 2010-05-26 | 特斯托股份公司 | Device for measuring state of oil or fat |
| CN202837286U (en) * | 2012-10-15 | 2013-03-27 | 北京赛必达科技有限公司 | Edible oil quality detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494036A (en) * | 2018-09-21 | 2019-03-19 | 湖南福德电气有限公司 | A kind of production technology improving resistor insulation performance |
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Application publication date: 20130710 |