WO2005098406A1 - Messvorrichtung zur messung des zustands von ölen oder fetten - Google Patents
Messvorrichtung zur messung des zustands von ölen oder fetten Download PDFInfo
- Publication number
- WO2005098406A1 WO2005098406A1 PCT/EP2005/003323 EP2005003323W WO2005098406A1 WO 2005098406 A1 WO2005098406 A1 WO 2005098406A1 EP 2005003323 W EP2005003323 W EP 2005003323W WO 2005098406 A1 WO2005098406 A1 WO 2005098406A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring device
- sensor
- connecting element
- measuring
- carrier
- Prior art date
Links
- 239000003921 oil Substances 0.000 title abstract description 22
- 239000003925 fat Substances 0.000 title abstract description 15
- 238000011156 evaluation Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000013213 extrapolation Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000021588 free fatty acids Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/226—Construction of measuring vessels; Electrodes therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/03—Edible oils or edible fats
Definitions
- the invention relates to a measuring device for measuring the state of oils or fats according to the preamble of claim 1.
- Hot oils or fats are often used in the preparation of food, which are not only used once, but are also used in deep fryers for successive cooking of different foods.
- the oil or fat is destroyed at hot operating temperatures between approx. 120 ° and 180 ° C due to oxidation, and undesirable chemical products such as e.g. free fatty acids or polymers that not only cause a deterioration in taste, but can also be harmful to health.
- measuring devices are used to measure the condition of the oils or fats, with which these are examined for their electrical properties.
- the measurement of the dielectric constant which is a reliable measure of the degree of destruction of the fat or oil, is particularly suitable.
- a measuring device for measuring the condition of an oil or grease which consists of a housing which comprises the electronic evaluation units and a data display, furthermore a tubular connecting element and a sensor arranged at the tip thereof, which can be immersed directly in the hot oil or fat and is suitable for determining the dielectric constant.
- the electrical connection between the sensor and the evaluation electronics takes place via cables freely laid inside the connecting element.
- DE 101 63 760 AI describes a further development of the above-mentioned measuring device.
- the electrical lines between the sensor and the evaluation electronics are formed by metal lines printed on a ceramic carrier.
- the tubular connecting element is shaped in such a way that it surrounds the majority of the carrier and narrows downwards in such a way that only the region of the carrier on which the sensor is arranged is accessible from the outside.
- An insulating sealing adhesive is introduced and cured between the carrier and the connecting element, so that there is no electrical connection between the connecting element and the electrical lines. It also provides good insulation that prevents oil from entering the interior of the connector.
- a temperature sensor is provided in the immediate vicinity of the lower end of the connecting element on the ceramic carrier, the measurement result of which can also be processed by the evaluation electronics.
- the disadvantage of this device is the inertia of the temperature sensor with regard to the reaction to temperature changes. Therefore, when immersing the sensors of the measuring device in the oil or fat, it is necessary to either
- the temperature sensor is arranged at a clear distance from the connecting element, which has a low thermal conductivity, the temperature sensor has a very small "thermal mass" so that a quick reaction to temperature changes can take place and thus
- the temperature sensor is preferably arranged in the front end region of the carrier, so that interference from other components is excluded. .5 In the sense of a short response time, the temperature sensor preferably has the smallest possible dimension.
- the sensor designed as an interdigital capacitor for measuring the dielectric constant has the same response speed as the temperature sensor, so that the response speed of the overall system increases.
- both sensors are arranged on opposite sides at the front end of the carrier, which ensures that both sensors are always exposed to the same ambient temperature and therefore no measurement inaccuracies occur.
- FIG. 1 shows a first embodiment of the measuring device according to the invention in front view
- FIG. 2 shows an enlarged view of the lower area to be immersed in the measuring device from FIG. 1;
- FIG 3 shows a longitudinal section through the lower region of a second embodiment of the measuring device according to the invention.
- FIG. 1 shows a measuring device 1 according to the invention for measuring the state of oils or fats in their upper
- the housing has a display 5 for the display of measured values.
- the display is preferably designed as an LCD display and is between a graphical representation, e.g. color classification of the measured values, and numerical display switchable.
- a keyboard 7 is provided for entering control commands, via which commands can be issued to the central control unit (not shown).
- the keyboard 7 is preferably designed as a membrane keyboard.
- the housing can preferably also have an interface 9, which can be used for communication with external computers.
- the measuring device 1 is preferably adapted to carry out a self-adjustment. During the use of the measuring device 1, the housing 3 also serves as a handle for the operator.
- a hollow connecting element 10 projects downward from the housing 3, which is sufficiently long and is made of a material with poor thermal conductivity, so that the sensitive evaluation electronics (not shown) of the measuring device 1, which are located in the region of the housing 3 and / or in the area of the connecting element 10 facing the housing 3, is adequately protected from the heat of the oil or fat to be measured. These measures also ensure that the operator can carry out the measurements safely.
- the connecting element 10 is preferably made of stainless steel, which in addition to its low thermal conductivity ability is also suitable due to its unrestricted usability in the food sector.
- the connecting element 10 is designed, for example, as a tubular component and is suitable for receiving electrical lines 12 which run inside the connecting element 10.
- the electrical lines 12 are arranged on at least one flat carrier 14, which is characterized by electrical insulation properties, for example a carrier 14 made of ceramic material.
- a sensor 16 for measuring electrical properties of the oil or fat and a temperature sensor 18 are arranged in the lower region of the carrier 14, the measured values of which are passed via the electrical lines 12 on the carrier 14 to the evaluation electronics.
- a protective means 20 can be attached around the lower area of the carrier 14, which protects the sensors 16, 18 against external influences, in particular against contact with the bottom or the walls of the measuring vessel. In the present case, the protective means 20 is considered to be connected to the
- a suitable adhesive 22 for example a silicone adhesive, is injected into the intermediate region between the carrier 14 and the connecting element 10, so that they do not touch directly and thus
- the adhesive 22 serves as a seal for the connecting element 10, so that no oil or grease can penetrate into the interior of the connecting element 10.
- the design of the adhesive surface must be secure against water inclusions, since otherwise there is a risk of explosion 35 on the one hand and on the other hand contamination of the measured material cannot be ruled out.
- the carrier 14 can extend as a one-piece element to the evaluation electronics however, there is also the possibility of decoupling, in that several carrier sections are strung together using suitable conductive connecting means. This provides advantages in particular with regard to the thermal load on the evaluation electronics.
- the sensor 16 for measuring the dielectric constant consists of a capacitor which measures the dielectric constant of the oil. It is preferably designed as an interdigital capacitor which consists of fine interlocking gold wires which each run into one of the electrical lines 12 which lead to the evaluation electronics.
- the lines 12 consist of a fine overlay of gold or copper on the carrier 14, the overlay being printed directly on the ceramic component.
- a multi-layer construction of the carrier 14 is also conceivable, as a result of which the sensitive lines 12 can be better protected against environmental influences.
- the temperature sensor 18 is designed, for example, as an electrical resistance, which can be formed, for example, from platinum or another suitable material. Because of the greatest possible distance from the connecting element 10, the temperature sensor 18 has a very small thermal mass. In addition, it is applied directly to the ceramic carrier 14 with the smallest possible dimensions using thick or thin layer technology. If both sensors 16, 18 are set to the same response speed, the response speed of the overall system is significantly increased, so that a continuous measurement is possible and extrapolation to a final value of the dielectric constant measurement is not necessary.
- fresh oil in the case of "optimal frying", fresh oil can be specifically mixed in for use in such a way that the content of polar fractions can be set between, for example, 12% and 18%, the result being able to be observed directly during mixing due to the rapid adaptation of the measuring device 1.
- the temperature sensor can also be arranged on the opposite side of the carrier 14 in the region of the tip of the carrier 14, as a result of which the size of the measuring device can be further reduced and yet both sensors 16, 18 are exposed to the same ambient temperature ,
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Food Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/547,894 US20080238445A1 (en) | 2004-04-06 | 2005-03-30 | Measuring Device For Measuring the State of Oils or Fats |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004016955A DE102004016955A1 (de) | 2004-04-06 | 2004-04-06 | Messvorrichtung zur Messung des Zustandes von Ölen oder Fetten (Temperatursensor) |
DE102004016955.1 | 2004-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005098406A1 true WO2005098406A1 (de) | 2005-10-20 |
Family
ID=34963361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/003323 WO2005098406A1 (de) | 2004-04-06 | 2005-03-30 | Messvorrichtung zur messung des zustands von ölen oder fetten |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080238445A1 (de) |
DE (1) | DE102004016955A1 (de) |
ES (1) | ES2322003B1 (de) |
WO (1) | WO2005098406A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008135367A1 (fr) * | 2007-04-20 | 2008-11-13 | Alpsens Technologies Inc. | Dispositif de mesure capacitive de la qualité et/ou de la dégradation d'un fluide, comportant un capteur capacitif découplé mécaniquement de son encapsulation |
CN103196959A (zh) * | 2013-04-10 | 2013-07-10 | 明尼苏达矿业制造特殊材料(上海)有限公司 | 用于检测油或脂的品质的装置 |
US8736282B2 (en) | 2007-04-20 | 2014-05-27 | Alpsens Technologies Inc. | Device for the capacitive measurement of the quality and/or deterioration of a fluid |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1439388A1 (de) * | 2003-01-20 | 2004-07-21 | Ecole Polytechnique Fédérale de Lausanne (EPFL) | Vorrichtung zur Messung der Qualität und/oder der Zersetzung einer Flüssigkeit, insbesondere von Speiseöl |
DE102006003733B3 (de) * | 2006-01-26 | 2007-03-29 | Testo Ag | Verfahren zur Prüfung eines Messgerätes |
DE102007036473A1 (de) | 2007-08-01 | 2009-02-05 | Testo Ag | Vorrichtung zum Messen des Zustands eines Messguts, insbesondere von Ölen oder Fetten |
DE102008014477B4 (de) | 2008-03-17 | 2018-08-30 | Testo Ag | Vorrichtung zum Messen des Zustands eines Messguts, insbesondere von Ölen oder Fetten |
DE102012206895A1 (de) | 2012-04-26 | 2013-10-31 | Schaeffler Technologies AG & Co. KG | Loslageranordnung |
CN106574907B (zh) | 2014-06-30 | 2020-11-13 | 皮特科炸具股份有限公司 | 用于感测油质量的系统和方法 |
US9841394B2 (en) | 2015-11-16 | 2017-12-12 | Pitco Frialator, Inc. | System and method for sensing oil quality |
US10436730B2 (en) | 2015-12-21 | 2019-10-08 | Pitco Frialator, Inc. | System and method for sensing oil quality |
CN112304607A (zh) * | 2019-07-15 | 2021-02-02 | 舍弗勒技术股份两合公司 | 带传感器的轴承座单元 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1046908A2 (de) * | 1999-04-22 | 2000-10-25 | ebro Electronic GmbH & Co. KG | Verfahren zum Messen des Zustands von Ölen und Fetten |
DE10163760A1 (de) * | 2001-12-28 | 2003-07-17 | Ebro Electronic Gmbh & Co Kg | Verfahren zum Messen des Zustandes von Ölen und Fetten |
WO2003060499A2 (de) * | 2002-01-17 | 2003-07-24 | Testo Gmbh & Co. | Messanordnung und sensoranordnung zur bestimmung einer eigenschaft eines fluides sowie verfahren zu ihrem betrieb. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3919864A1 (de) * | 1989-06-19 | 1990-12-20 | Testoterm Mestechnik Gmbh & Co | Kapazitiver feuchtesensor |
US5818731A (en) * | 1995-08-29 | 1998-10-06 | Mittal; Gauri S. | Method and apparatus for measuring quality of frying/cooking oil/fat |
US6718819B2 (en) * | 2001-09-10 | 2004-04-13 | Honeywell International Inc. | Oil quality sensor system, method and apparatus |
-
2004
- 2004-04-06 DE DE102004016955A patent/DE102004016955A1/de not_active Ceased
-
2005
- 2005-03-30 US US11/547,894 patent/US20080238445A1/en not_active Abandoned
- 2005-03-30 ES ES200650066A patent/ES2322003B1/es not_active Expired - Fee Related
- 2005-03-30 WO PCT/EP2005/003323 patent/WO2005098406A1/de active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1046908A2 (de) * | 1999-04-22 | 2000-10-25 | ebro Electronic GmbH & Co. KG | Verfahren zum Messen des Zustands von Ölen und Fetten |
DE10163760A1 (de) * | 2001-12-28 | 2003-07-17 | Ebro Electronic Gmbh & Co Kg | Verfahren zum Messen des Zustandes von Ölen und Fetten |
WO2003060499A2 (de) * | 2002-01-17 | 2003-07-24 | Testo Gmbh & Co. | Messanordnung und sensoranordnung zur bestimmung einer eigenschaft eines fluides sowie verfahren zu ihrem betrieb. |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008135367A1 (fr) * | 2007-04-20 | 2008-11-13 | Alpsens Technologies Inc. | Dispositif de mesure capacitive de la qualité et/ou de la dégradation d'un fluide, comportant un capteur capacitif découplé mécaniquement de son encapsulation |
US8436629B2 (en) | 2007-04-20 | 2013-05-07 | Alpsens Technologies Inc. | Device for the capacitive measurement of the quality and/or deterioration of a fluid, including a capacitive sensor that is mechanically uncoupled from the element in which it is encapsulated |
US8736282B2 (en) | 2007-04-20 | 2014-05-27 | Alpsens Technologies Inc. | Device for the capacitive measurement of the quality and/or deterioration of a fluid |
CN103196959A (zh) * | 2013-04-10 | 2013-07-10 | 明尼苏达矿业制造特殊材料(上海)有限公司 | 用于检测油或脂的品质的装置 |
Also Published As
Publication number | Publication date |
---|---|
DE102004016955A1 (de) | 2005-10-27 |
ES2322003B1 (es) | 2010-04-21 |
ES2322003A1 (es) | 2009-06-15 |
US20080238445A1 (en) | 2008-10-02 |
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