CN213633266U - Oil acid value detection device - Google Patents
Oil acid value detection device Download PDFInfo
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- CN213633266U CN213633266U CN202022652808.1U CN202022652808U CN213633266U CN 213633266 U CN213633266 U CN 213633266U CN 202022652808 U CN202022652808 U CN 202022652808U CN 213633266 U CN213633266 U CN 213633266U
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- interdigital electrode
- acid value
- detection device
- electrode sensor
- oil
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Abstract
The utility model provides an oleic acid price detection device relates to acid price detection technical field. The oil acid value detection device comprises a shell, a host unit, a display unit and an interdigital electrode sensor; the main machine unit is arranged in the shell, the display unit is arranged on one side of the shell, and the interdigital electrode sensor is arranged at one end of the shell; the host unit is respectively connected with the display unit and the interdigital electrode sensor. The utility model provides an oleic acid price detection device, obtain the dielectric constant information of fluid through interdigital electrode sensor, then directly can obtain the acid price after data processing analysis to show the acid price; during detection, the device is inserted into oil for a moment, so that a final acid value measurement result can be obtained, the detection is quick and accurate, and the cost is low.
Description
Technical Field
The utility model belongs to the technical field of the acid value detects technique and specifically relates to an oil acid value detection device for frying oil is related to.
Background
For food processing, frying is usually used, in which the frying oil is heated to about 150 to 180 ℃, at which temperature the frying oil undergoes ageing, for example oxidation by atmospheric oxygen, and high temperatures produce many chemical decomposition products, which not only affect the taste of the food, but also affect the health of the body. In order to determine the quality of the frying oil during frying, it is often necessary to measure the acid value and the polar components of the frying oil, which is a measure of the degree of thermo-oxidative degradation of the frying oil.
The existing detection method of the acid value of the frying oil comprises an acid-base titration method and a test paper detection method, wherein the acid-base titration method needs to be carried out in a laboratory environment by special laboratory personnel through a titrator, so that the cost is high and the detection efficiency is low; the oil test paper is a disposable product, so the test paper must be used within a short shelf life, the problem of high cost is also caused by long-time use, and the measurement result of the oil test paper needs to be compared with the color through a color comparison card, so that an accurate numerical value cannot be obtained.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oleic acid price detection device to solve drawbacks such as with high costs, detection efficiency low that current fried oil acid price detection method exists.
In order to solve the technical problem, the utility model discloses at first provide an oleic acid price detection device, concrete technical scheme is as follows:
an oil acid value detection device comprises a shell, a host unit, a display unit and an interdigital electrode sensor; the main unit is arranged in the shell, the display unit is arranged on one side of the shell, and the interdigital electrode sensor is arranged at one end of the shell; the host unit is respectively connected with the display unit and the interdigital electrode sensor; the main unit is used for analyzing the dielectric constant information detected by the interdigital electrode sensor and obtaining the acid value, and the display unit is used for displaying the acid value data.
Further, the interdigital electrode sensor comprises an electrode substrate, a lead pad and an interdigital electrode; the lead bonding pad and the interdigital electrode are both arranged on the electrode substrate, and the lead bonding pad is respectively connected with the interdigital electrode and the host unit.
Furthermore, the interdigital electrode sensor also comprises a protective film attached to the interdigital electrode.
Furthermore, the oil temperature detection device also comprises a temperature sensor, wherein the temperature sensor is connected with the main machine unit and is used for detecting the oil temperature.
Further, the temperature sensor is integrally arranged on the interdigital electrode sensor.
Further, the interdigital electrode sensor further comprises a connecting rod, wherein the connecting rod is provided with a first end and a second end which are opposite, the first end is connected with the shell, and the second end is connected with the interdigital electrode sensor.
Further, the casing is equipped with the connector, first end is connected with the locking lid, the locking lid with the connector can be dismantled and be connected, just the radial dimension of locking lid is greater than the radial dimension of connecting rod.
Furthermore, the second end is connected with the protective housing, the interdigital electrode sensor is embedded into in the protective housing, just the part that the interdigital electrode sensor is used for contacting fluid exposes.
Further, the protective housing is detachably connected with the second end.
Further, the protective shell is provided with a connecting plate, the connecting plate is connected with the second end, and the thickness of the connecting plate is smaller than the radial size of the connecting rod; the two opposite sides of the connecting plate are provided with reinforcing ribs, one end part of each reinforcing rib is connected with the second end and is in smooth transition, and the other end part of each reinforcing rib is flush with one end, far away from the connecting rod, of the connecting plate.
According to the utility model provides an oleic acid price detection device, obtain the dielectric constant information of fluid through interdigital electrode sensor, then can directly obtain the acid price after data processing analysis to show the acid price; during detection, the device is inserted into oil for a moment, so that a final acid value measurement result can be obtained, the detection is quick and accurate, and the cost is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fried oleic acid detection device provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an interdigital electrode sensor of a fried oleic acid detection device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an influence curve of the temperature detected by the fried oleic acid detection device on the dielectric constant according to the embodiment of the present invention.
Icon:
1-a shell; 2-a display unit; 3-an operation unit; 4-interdigital electrode sensors; 41-electrode substrate; 42-wire bond pads; 43-interdigitated electrodes; 44-protective film; 5-a connecting rod; 51-a first end; 52-second end; 6-locking cover; 7-protective shell; 71-reinforcing ribs.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Based on the problems in the background art, the present embodiment provides an oleic acid value detection device, which is different from an acid-base titration method and a disposable test paper method in a laboratory, and the oleic acid value detection device of the present embodiment is based on that the thermal oxidation decomposition degree of frying oil and the dielectric constant have a highly reliable correlation scale, and by establishing a data model between the dielectric constant and the acid value, the numerical value of the acid value can be obtained by a method of measuring the dielectric constant of the frying oil by using the interdigital electrode sensor 4.
Referring to fig. 1, the oil acid value detection device of the present embodiment includes a housing 1, a host unit (not shown), a display unit 2, an operation unit 3, and the like, and further includes an interdigital electrode sensor 4, and further includes a power supply unit (not shown) capable of supplying power to electric components such as the host unit, the display unit 2, and the operation unit 3, and preferably capable of charging.
The structure of the casing 1 of the present embodiment is similar to the casing 1 of the existing electronic thermometer or electronic detection instrument, generally the length does not exceed the human hand, and the shape is similar to a rectangular block, a groove structure convenient for the human hand to hold can be designed on the two sides of the casing 1, the casing 1 is used as the basic mounting structure of the whole device, and is used for mounting the above-mentioned host unit, the display unit 2, the operation unit 3 and the like.
The host unit of this embodiment may be a control circuit board such as a PLC, an MCU, etc., and may also be referred to as a data processing unit, and the structure form thereof is not limited as long as it has functions of data receiving, processing, etc., and an arithmetic logic is provided in the host unit, and the arithmetic logic performs data acquisition according to standard sample frying oil with known acid value, and then may obtain a linear relationship between the dielectric constant and the acid value to convert the dielectric constant into the acid value. The display unit 2 of this embodiment may be a display screen disposed at the opening of the housing 1 for displaying the acid value data, and certainly, other display functions, such as electric quantity display, may be added according to the requirement.
The main unit of the embodiment is arranged in a shell 1, a display unit 2 is arranged at one side of the shell 1, and an interdigital electrode sensor 4 is arranged at one end of the shell 1; the host unit is respectively connected with the display unit 2 and the interdigital electrode sensor 4. The interdigital electrode sensor 4 of the present embodiment is used for contacting oil, the host unit is used for analyzing the dielectric constant information detected by the interdigital electrode sensor 4 and obtaining an acid value, and the display unit 2 is used for displaying acid value data. The operation unit 3 of the present embodiment may be a physical key in the figure for opening and closing the device and performing corresponding operations on the device, and may also be a virtual touch key.
When the oil acid value detection device of the embodiment is used for detection, the interdigital electrode sensor 4 can be firstly wiped to prevent dirt from influencing detection precision, then the interdigital electrode sensor 4 is inserted into frying oil for a period of time, the period of time can be 12s to 18s, dielectric constant information of the oil is obtained, then the host unit directly can obtain the acid value after data processing and analysis, the acid value is displayed through the display unit 2, the detection is rapid and accurate, and the cost is low.
In addition, based on the above-mentioned structure, the inventor finds that high temperature has a certain influence on the dielectric constant, and therefore, in view of this point, the oil acid value detection apparatus of the present embodiment further includes a temperature sensor (not shown in the figure), which is connected to the host unit of the present embodiment and is preferably integrated with the interdigital electrode sensor 4 of the present embodiment, and the host unit of the present embodiment corrects the detected dielectric constant according to the data detected by the temperature sensor, specifically, calculates the acid value by establishing the correlation between the dielectric constant and the temperature, and between the dielectric constant and the acid value, and finally calculates the acid value in combination with the dielectric constant and the temperature change of the frying oil.
Taking peanut oil as an example and taking the peanut oil as shown in the attached figure 3, the inventor obtains a dielectric constant-temperature relation curve through a large number of experiments, and the relation curve adopts a least square method to fit the curve. Least squares polynomial curve fitting, given m points, does not require the curve to pass exactly through these points, but rather the approximate curve y f (x) of the curve y (f (x)).
When the distribution of the sample points is not a straight line, polynomial curve fitting is adopted, namely a fitting curve equation is an nth-order polynomial:
expressed in matrix form as: y ═ X0A, wherein:
the term to be solved is a coefficient vector
A＝[an，an-1，...，a2，a1，a0]T。
Curve fitting equation Y ═ X0The solution method of a is the same as the solution method of the above straight line, and also in the equation Y ═ X0A two sides simultaneously left-multiplying by X0The transposed matrix of (d) yields:
then simultaneously carrying out left multiplication on two sides of the new equation
X0The inverse matrix of (d) to obtain:
the left part of the above equation is known, so the coefficient vector a of the fitted curve equation can be solved directly.
After the equation of the dielectric constant and the temperature is obtained, the influence of the temperature on the dielectric constant can be revised through the equation when the high-temperature frying oil is measured. The linear relationship between dielectric constant and acid value can be obtained by data acquisition of a standard sample frying oil with known acid value.
By synthesizing the curve equations of the dielectric constant and the temperature, and the dielectric constant and the acid value, the curve equation between the dielectric constant and the acid value can be obtained, and the equation coefficient is stored in the oil acid value detection device of the embodiment, so that the method for rapidly measuring the high-temperature frying oil by using the oil acid value detection device can be realized.
As shown in fig. 2, the interdigital electrode sensor 4 of the present embodiment includes an electrode substrate 41, a lead pad 42, and an interdigital electrode 43; the lead pad 42 and the interdigital electrode 43 are disposed on the electrode substrate 41, the lead pad 42 is connected to the interdigital electrode 43 and the host unit, respectively, the interdigital electrode 43 is an electrode having a periodic pattern in a finger-shaped or comb-shaped surface, and is capable of generating a capacitance related to an electric field that can penetrate through the material sample and the sensitive coating, and the specific structural form and operation principle of the electrode substrate 41, the lead pad 42 and the interdigital electrode 43 are well known to those skilled in the art, and thus the present embodiment does not give excessive description to the above structure.
Preferably, in order to protect the interdigital electrode sensor 4, the interdigital electrode sensor 4 of the present embodiment further includes a protective film 44 attached to the interdigital electrode 43, and the protective film 44 is attached to the oil-repellent layer of the interdigital electrode 43 and can be removed when in use.
In addition, in order to extend the distance between the position held by the hand and the interdigital electrode sensor 4, so that the hand is in a safe position during detection and is prevented from being too close to the oil, the oleic acid detection device of the present embodiment further includes a connecting rod 5, the connecting rod 5 has a first end 51 and a second end 52 which are opposite, the first end 51 is connected with the housing 1, and the second end 52 is connected with the interdigital electrode sensor 4.
Preferably, this embodiment designs connecting rod 5 and casing 1 to be dismantled and be connected, specifically can be equipped with the connector at casing 1, and first end 51 is connected with locking lid 6, and locking lid 6 can be dismantled with the connector and be connected, and the connection mode of dismantling can be threaded connection to the radial dimension of locking lid 6 of this embodiment is greater than the radial dimension of connecting rod 5, makes the junction between them have stronger structural strength.
In order to protect the interdigital electrode sensor 4 and prevent the interdigital electrode sensor from colliding with the mobile phone, the detection accuracy is not affected, the second end 52 of the present embodiment is connected to the protective shell 7, the structure and the function of the protective shell 7 are similar to those of a mobile phone shell, the interdigital electrode sensor 4 of the present embodiment is embedded in the protective shell 7, and a part of the interdigital electrode sensor 4, which is used for contacting oil, is exposed, that is, the interdigital electrode 43 of the present embodiment is exposed.
Preferably, the protective housing 7 of the present embodiment is detachably connected to the second end 52, so as to conveniently detach and install the protective housing 7 and the interdigital electrode sensor 4 thereon, and specifically, referring to fig. 2, the protective housing 7 of the present embodiment is provided with a flat connecting plate, a thickness of the connecting plate is smaller than a radial dimension of the connecting rod 5, the connecting plate is connected to the second end 52, two opposite sides of the connecting plate are provided with reinforcing ribs 71, one end portion of each reinforcing rib 71 is connected to the second end 52 and is in smooth transition, and the other end portion of each reinforcing rib 71 is approximately flush with one end of the connecting plate away from the connecting rod 5.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The device for detecting the acid value of the oil is characterized by comprising a shell, a host unit, a display unit and an interdigital electrode sensor;
the main unit is arranged in the shell, the display unit is arranged on one side of the shell, and the interdigital electrode sensor is arranged at one end of the shell;
the host unit is respectively connected with the display unit and the interdigital electrode sensor;
the main unit is used for analyzing the dielectric constant information detected by the interdigital electrode sensor and obtaining the acid value, and the display unit is used for displaying the acid value data.
2. The oil acid value detection device according to claim 1, wherein the interdigital electrode sensor comprises an electrode substrate, a lead pad, and an interdigital electrode;
the lead bonding pad and the interdigital electrode are both arranged on the electrode substrate, and the lead bonding pad is respectively connected with the interdigital electrode and the host unit.
3. The oil acid value detection device of claim 2, wherein the interdigital electrode sensor further comprises a protective film attached to the interdigital electrode.
4. The oil acid value detection device of claim 1, further comprising a temperature sensor connected to the main unit and configured to detect a temperature of the oil.
5. The oil acid value detection device of claim 4, wherein the temperature sensor is integrally disposed on the interdigital electrode sensor.
6. The oil acid value detection device of any one of claims 1-5, further comprising a connecting rod having opposing first and second ends, the first end connected to the housing and the second end connected to the interdigital electrode sensor.
7. The oil acid value detection device of claim 6, wherein the housing is provided with a connection port, the first end is connected with a locking cover, the locking cover is detachably connected with the connection port, and the radial dimension of the locking cover is larger than that of the connection rod.
8. The oil acid value detection device according to claim 6, wherein a protective shell is connected to the second end, the interdigital electrode sensor is embedded in the protective shell, and a part of the interdigital electrode sensor, which is used for contacting oil, is exposed.
9. The oil acid value detection device of claim 8, wherein the protective shell is removably attached to the second end.
10. The oil acid value detection device of claim 8, wherein the protective shell is provided with a connection plate connected to the second end, the connection plate having a thickness less than a radial dimension of the connection rod;
the two opposite sides of the connecting plate are provided with reinforcing ribs, one end part of each reinforcing rib is connected with the second end and is in smooth transition, and the other end part of each reinforcing rib is flush with one end, far away from the connecting rod, of the connecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022652808.1U CN213633266U (en) | 2020-11-16 | 2020-11-16 | Oil acid value detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022652808.1U CN213633266U (en) | 2020-11-16 | 2020-11-16 | Oil acid value detection device |
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| Publication Number | Publication Date |
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| CN213633266U true CN213633266U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022652808.1U Active CN213633266U (en) | 2020-11-16 | 2020-11-16 | Oil acid value detection device |
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| CN (1) | CN213633266U (en) |
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- 2020-11-16 CN CN202022652808.1U patent/CN213633266U/en active Active
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