Oil product electrode capable of simultaneously detecting temperature and capacitance

Abstract

The utility model provides an oil product electrode capable of simultaneously detecting temperature and capacitance, which comprises an electrode substrate, the substrate is provided with a conducting through hole, and the front surface of the substrate is provided with a front surface electrode area (2) and a front surface electrode pin (1); a back electrode area (4) and back electrode pins (3) are arranged on the back of the substrate; the upper ends of the front electrode pins (1) and the upper ends of the back electrode pins (3) are provided with the conduction through holes at the same positions. And the front electrode region (2) and the back electrode region (4) are also modified with electrode protection layers.

Description

Technical Field

[0001] The utility model belongs to the field of electrochemical sensors and relates to an oil electrode capable of detecting temperature and capacitance simultaneously. Background Art

[0002] Food safety has always been one of the issues that has attracted much attention. Unsafe food may cause food poisoning, foodborne diseases and other health problems, posing serious health risks and economic burdens to individuals and society.

[0003] The quality of cooking oil is crucial to our health. Substandard cooking oil may contain harmful substances such as heavy metals, pesticide residues, and genetically modified ingredients, posing potential risks to human health. Furthermore, the quality of cooking oil also affects the taste, texture, and cooking results of food. Therefore, ensuring the safety and quality of cooking oil is a pressing need that needs to be addressed in the food safety field.

[0004] Currently, most testing methods for frying oils in my country rely on traditional chemical methods. However, these methods require laboratory professionals, are time-consuming and laborious, and the use of chemical reagents can harm the health of testers, while waste chemicals can pollute the environment. Therefore, a fast, accurate, and efficient edible oil rapid testing instrument is the optimal tool for routine rapid testing. Equipped with appropriate core sensor components, it can effectively assess edible oil quality, freshness, and other food safety-related indicators.

[0005] The sensor chip is the core component of the sensor. Improving the overall stability and sensitivity of the sensor requires improving its performance. Therefore, the performance of the sensor chip largely determines the specific performance of edible oil rapid testing instruments on the market. Considering the edible oil testing environment, detection electrodes that can withstand high temperatures and possess precision, stability, and sufficient lifespan are required. Conventional screen-printed or gold-plated electrodes are incapable of high-temperature operation or have a limited lifespan. Furthermore, they are not designed for the specific oil testing indicators and cannot meet these requirements.

[0006] Based on the above situation, this patent aims to provide a high-precision, high-stability oil detection electrode that can meet the needs of high-temperature oil detection. Utility Model Content

[0007] In summary, the utility model provides an oil electrode that can simultaneously detect temperature and capacitance.

[0008] The utility model discloses a kind of oil product electrodes that can detect temperature and capacitance simultaneously, including electrode substrate, substrate is equipped with through hole, substrate front surface is provided with front electrode area (2) and front electrode pin (1);Substrate back surface is provided with back electrode area (4) and back electrode pin (3);Front electrode pin (1) and back electrode pin (3) are equipped with through hole in the same position;Front electrode area (2) and back electrode area (4) are also decorated with electrode protective layer.

[0009] Front electrode pin (1) includes first electrode pin (11), second electrode pin (12), third electrode pin (13) and fourth electrode pin (14);Back electrode pin (3) includes fifth electrode pin (31), sixth electrode pin (32), seventh electrode pin (33) and eighth electrode pin (34).

[0010] As shown in Fig. 1 and Fig. 2, it is the front view and back view of the oil product electrode that can detect temperature and capacitance simultaneously. Figure 1 And as shown in Fig. 3 and Fig. 4, it is the front view and back view of the oil product electrode that can detect temperature and capacitance simultaneously. Figure 2

[0011] Front electrode area (2) is provided with front electrode layer, and front electrode layer includes first electrode layer (21) and second electrode layer (22), and is connected with first electrode pin (11) and second electrode pin (12) respectively;Back electrode area (4) is provided with back electrode layer, and back electrode layer includes third electrode layer (41) and fourth electrode layer (42), and is connected with sixth electrode pin (32) and seventh electrode pin (33) respectively.

[0012] Further, the upper end of the first electrode layer (21) and the upper end of the second electrode layer (22) are provided with interdigitated strips parallel to each other at equal distances, the interdigitated strips of the first electrode layer (21) are arranged in the gaps of the interdigitated strips of the second electrode layer (22), and the spacing distances are the same.

[0013] Further, the upper end of the third electrode layer (41) is provided with a metal electrode layer, and the fourth electrode layer (42) is arranged on the side of the third electrode layer (41);A connection circuit (43) is arranged between the third electrode layer (41) and the fourth electrode layer (42), and the surface of the connection circuit is coated with a resistance paste.

[0014] The front electrode is provided with four electrode pins, wherein the first electrode pin (11) and the second electrode pin (12) are connected with the first electrode layer (21) and the second electrode layer (22) respectively, specifically connected by metal lines, and the first electrode layer (21) and the second electrode layer (22) form interdigital electrode structures in the form of tooth comb respectively.

[0015] ​When the electrode is actually used, the interdigitated electrodes of the front electrode contact the detection liquid, generating an electrical signal which is transmitted outward through the electrode pins. The electrical signals transmitted by different pins can be collected to construct multiple electrode systems for detecting specific indicators. The first electrode pin (11) and the second electrode pin (12) constitute an electrode system that can be used to detect capacitance parameters.

[0016] The front electrode layer also includes a third electrode layer, which is connected to the fourth electrode pin (14) and is arranged near the area where the first electrode layer (21) and the second electrode layer (22) are located. The position of the third electrode layer can be set according to actual needs, as shown in the attached figure. Figure 1 In the embodiment, the third electrode layer is arranged below the area where the second electrode layer (22) is located, and beside the line connecting the second electrode layer (22) and the second electrode pin (12).

[0017] The back electrode is also provided with four electrode pins at positions corresponding to the front electrode, and shares a conductive through hole with the pins provided on the front electrode, wherein the fifth electrode pin (31) and the first electrode pin (11), the sixth electrode pin (32) and the second electrode pin (12), the seventh electrode pin (33) and the third electrode pin (13), and the eighth electrode pin (34) and the fourth electrode pin (14) are respectively provided at the same positions on the front and back sides, and a conductive through hole is provided at the same position, the interior of the conductive through hole is processed into a conductive through hole, and the electrode pins on the front and back sides are correspondingly connected through the conductive through hole.

[0018] The sixth electrode pin (32) and the seventh electrode pin (33) on the back are respectively connected to the third electrode layer (41) and the fourth electrode layer (42), specifically connected by metal lines, wherein the third electrode layer (41) occupies the main body of the electrode area, and its electrode covering position coincides with the position of the front interdigitated electrode structure. The fourth electrode layer (42) is a thin metal strip, which is arranged on the side of the third electrode layer (41), and its upper end is connected to the upper end of the third electrode layer (41) by a connecting circuit (43).

[0019] The second electrode pin (12) and the third electrode pin (13) are respectively connected to the sixth electrode pin (32) and the seventh electrode pin (33) through conductive through-holes, and are further connected to the back electrode layer formed by the third electrode layer (41), the fourth electrode layer (42) and the connecting circuit (43), wherein the connecting circuit (43) can be used as a temperature measurement circuit or a temperature-sensitive resistor. The second electrode pin (12) and the third electrode pin (13) form an electrode system that can be used to detect temperature parameters.

[0020] Furthermore, the resistance of the resistor paste is 1300±10%Ω.

[0021] The resistance of the resistor paste can be adjusted as needed, thereby modifying thermistors of varying resistance values ​​to meet electrochemical testing requirements. For high-temperature oil testing, this patent selects a resistance value of 1300±0%Ω to accurately measure multiple parameters such as the oil's TPM value.

[0022] Furthermore, the front electrode layer is modified with a gold layer, and the thickness of the gold layer is greater than 2 μm.

[0023] The front electrode can be modified with a variety of processes such as screen printing, electroplating, chemical plating and other methods to modify the metal layer of the front electrode. The front electrode is modified with a pure gold layer, and the thickness is limited to greater than 2μm to ensure the sensitivity and stability of the pure gold electrode.

[0024] Furthermore, the back electrode layer is modified with a silver layer, and the thickness of the silver layer is 8 to 15 μm.

[0025] The back electrode modification metal layer can also adopt a variety of processes, such as screen printing, electroplating, chemical plating and other methods, and the back electrode is modified with conductive silver paste, while limiting the thickness to 8 to 15 μm, preferably 10 μm.

[0026] Furthermore, the electrode protection layer modified on the back electrode region (4) does not cover the region where the connecting circuit (43) is located.

[0027] The surfaces of the front electrode pin (1) and the back electrode pin (3) are modified with metal paste, which includes conductive silver paste and conductive silver palladium paste; the thickness of the metal paste is 8 to 15 μm, preferably 10 μm.

[0028] A pin is fixed to the lower end of the front electrode pin (1), and the pin can be fixed to the surface of the front electrode pin (1) using solder.

[0029] Furthermore, the thickness of the electrode protection layer is 8 to 15 μm, preferably 10 μm.

[0030] Furthermore, the protective layer material includes glass glaze.

[0031] In order to allow the electrode to be used in a high-temperature environment without affecting its sensitivity and accuracy, a protective layer needs to be covered on the electrode surface to protect the metal structure modified on the electrode surface. The metal electrode layer structure modified on the electrode surface may be corroded or peeled off or fall off in a high-temperature environment. At the same time, the high-temperature and high-pressure environment will also affect the overall stability and service life of the electrode. Therefore, it is necessary to select a protective layer that does not affect the contact of the detection molecules with the metal electrode and can isolate other substances at the same time. This patent selects materials including but not limited to glass enamel layers for electrode surface protection.

[0032] The glass glaze used in this patent can be a transparent material, and at the same time, it has no granular feeling after sintering at 850°C. Under the premise of limiting the thickness of the glass glaze protective layer, it can be used in high temperature and high pressure environments and protect the metal circuits on the surface of the electrode. Specifically, the electrode can be immersed in cooking oil with a temperature of ≤300°C for more than 24 hours, and neither the electrode nor the glass glaze protective layer is damaged.

[0033] The beneficial effects of the utility model are:

[0034] (1) The utility model modifies the electrode structure and electrode pins on both sides of the same substrate, and sets conductive through holes on the electrode pins to connect the circuits on both sides. The electrochemical reaction signals generated by the electrode detection areas on the front and back sides are transmitted to the electrode pins through this path, and then transmitted out to form multiple detection circuits, which greatly reduces the electrode area and achieves the purpose of simultaneously detecting multiple indicators of oil products.

[0035] (2) The present invention modifies the front and back sides of the electrode with an electrode protective layer such as glass glaze, which isolates and protects the electrode metal layer from the detection liquid without affecting the electrochemical reaction between the detection liquid and the electrode detection area, thereby ensuring the sensitivity, accuracy and stability of the electrode, greatly improving the service life of the electrode, and ensuring that the electrode can be reused many times in extreme environments such as high temperature and high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The utility model is further described with reference to the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0037] Figure 1 This is a front view of an oil electrode that can detect both temperature and capacitance;

[0038] Figure 2 This is a schematic diagram of the back of the oil electrode that can detect both temperature and capacitance.

[0039] Legend:

[0040] 1. Front electrode pin; 11. First electrode pin; 12. Second electrode pin; 13. Third electrode pin; 14. Fourth electrode pin; 2. Front electrode region; 21. First electrode layer; 22. Second electrode layer; 3. Back electrode pin; 31. Fifth electrode pin; 32. Sixth electrode pin; 33. Seventh electrode pin; 34. Eighth electrode pin; 4. Back electrode region; 41. Third electrode layer; 42. Fourth electrode layer; 43. Connecting circuit. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the following specific embodiments and the accompanying drawings.

[0042] Example 1

[0043] As attached Figure 1 As shown, the oil electrode provided by the utility model can simultaneously detect temperature and capacitance, including an alumina ceramic electrode substrate, an electrode size of 37.50x10.16mm, and a thickness of 1.00mm.

[0044] A front electrode area 2 and a front electrode pin 1 are provided on the front side of the substrate. The front electrode area 2 is provided with a front electrode layer. The front electrode layer includes a first electrode layer 21 and a second electrode layer 22, and is respectively connected to the first electrode pin 11 and the second electrode pin 12; the front electrode pin 1 includes a first electrode pin 11, a second electrode pin 12, a third electrode pin 13 and a fourth electrode pin 14.

[0045] Parallel and equidistant interdigitated strips are laterally arranged between the upper end of the first electrode layer 21 and the upper end of the second electrode layer 22. The interdigitated strips of the first electrode layer 21 are arranged in the gaps between the interdigitated strips of the second electrode layer 22, and the spacing distances are the same. There are 36 pairs of interdigitated strips in total, and the width of the interdigitated strips and the spacing between them, that is, the line width and line spacing, are 130μm and 130μm respectively.

[0046] The front electrode layer also includes a third electrode layer, which is correspondingly connected to the fourth electrode pin 14 . The third electrode layer is arranged below the area where the first electrode layer 21 and the second electrode layer 22 are located, and beside the line connecting the second electrode layer 22 and the second electrode pin 12 .

[0047] The metal pattern of the front electrode layer is modified with a gold film by a screen printing process to obtain a front gold electrode with a gold film thickness of 5 μm.

[0048] A back electrode area 4 and a back electrode pin 3 are provided on the back side of the substrate. The back electrode area 4 is provided with a back electrode layer. The back electrode layer includes a third electrode layer 41 and a fourth electrode layer 42, and is respectively connected to the sixth electrode pin 32 and the seventh electrode pin 33; the back electrode pin 3 includes a fifth electrode pin 31, a sixth electrode pin 32, a seventh electrode pin 33 and an eighth electrode pin 34.

[0049] A metal electrode layer is provided at the upper end of the third electrode layer (41), and the fourth electrode layer (42) is provided on the side of the third electrode layer (41); a connecting circuit (43) is provided between the third electrode layer (41) and the fourth electrode layer (42), and a surface of the connecting circuit is coated with a resistance paste, and the resistance value of the resistance paste is 1300±10%Ω.

[0050] The back electrode layer is modified with silver paste by screen printing process to obtain a back silver electrode with a silver layer thickness of 10 μm.

[0051] The back electrode is also provided with four electrode pins at the corresponding positions of the front electrode, and shares a conductive through-hole with the pins provided on the front electrode, wherein the fifth electrode pin 31 and the first electrode pin 11, the sixth electrode pin 32 and the second electrode pin 12, the seventh electrode pin 33 and the third electrode pin 13, and the eighth electrode pin 34 and the fourth electrode pin 14 are respectively provided at the same positions on the front and back sides, and a conductive through-hole is provided at the same position respectively. The inside of the conductive through-hole is processed as a conductive through-hole, and the electrode pins on the front and back sides are correspondingly connected through the conductive through-hole. The four conductive through-holes are consistent in shape and size, and the diameter of the conductive hole is 0.80mm.

[0052] Conductive silver paste and / or conductive silver palladium paste are printed on the surfaces of the front electrode pin 1 and the back electrode pin 3 , and the thickness of the conductive silver paste is 10 μm.

[0053] The front electrode region 2 and the back electrode region 4 are further decorated with an electrode protection layer having a thickness of 10 μm and made of transparent glass glaze.

[0054] The electrode protection layer modified on the back electrode region 4 does not cover the region where the connecting circuit 43 is located.

[0055] Four pins are welded and installed at the lower ends of the four electrode pins of the front electrode pin 1 to facilitate the use of the electrode.

[0056] Example 2

[0057] The utility model provides an oil product electrode capable of simultaneously detecting temperature and capacitance, comprising an alumina ceramic electrode substrate, with an electrode size of 37.50x10.16mm and a thickness of 1.00mm.

[0058] A front electrode area 2 and a front electrode pin 1 are provided on the front side of the substrate. The front electrode area 2 is provided with a front electrode layer. The front electrode layer includes a first electrode layer 21 and a second electrode layer 22, and is respectively connected to the first electrode pin 11 and the second electrode pin 12; the front electrode pin 1 includes a first electrode pin 11, a second electrode pin 12, a third electrode pin 13 and a fourth electrode pin 14.

[0059] Parallel and equidistant interdigitated strips are laterally arranged between the upper end of the first electrode layer 21 and the upper end of the second electrode layer 22. The interdigitated strips of the first electrode layer 21 are arranged in the gaps between the interdigitated strips of the second electrode layer 22, and the spacing distances are the same. There are a total of 30 pairs of interdigitated strips, and the width of the interdigitated strips and the spacing between them, that is, the line width and line spacing are 100μm and 100μm respectively.

[0060] The front electrode layer also includes a third electrode layer, which is correspondingly connected to the fourth electrode pin 14 . The third electrode layer is arranged below the area where the first electrode layer 21 and the second electrode layer 22 are located, and beside the line connecting the second electrode layer 22 and the second electrode pin 12 .

[0061] The metal pattern of the front electrode layer is modified with a gold film by a screen printing process to obtain a front gold electrode with a gold film thickness of 3 μm.

[0062] A back electrode area 4 and a back electrode pin 3 are provided on the back side of the substrate. The back electrode area 4 is provided with a back electrode layer. The back electrode layer includes a third electrode layer 41 and a fourth electrode layer 42, and is respectively connected to the sixth electrode pin 32 and the seventh electrode pin 33; the back electrode pin 3 includes a fifth electrode pin 31, a sixth electrode pin 32, a seventh electrode pin 33 and an eighth electrode pin 34.

[0063] A metal electrode layer is provided at the upper end of the third electrode layer (41), and the fourth electrode layer (42) is provided on the side of the third electrode layer (41); a connecting circuit (43) is provided between the third electrode layer (41) and the fourth electrode layer (42), and a surface of the connecting circuit is coated with a resistance paste, and the resistance value of the resistance paste is 1300±10%Ω.

[0064] The back electrode layer is modified with silver paste by screen printing process to obtain a back silver electrode with a silver layer thickness of 10 μm.

[0065] The back electrode is also provided with four electrode pins at the corresponding positions of the front electrode, and shares a conductive through-hole with the pins provided on the front electrode, wherein the fifth electrode pin 31 and the first electrode pin 11, the sixth electrode pin 32 and the second electrode pin 12, the seventh electrode pin 33 and the third electrode pin 13, and the eighth electrode pin 34 and the fourth electrode pin 14 are respectively provided at the same positions on the front and back sides, and a conductive through-hole is provided at the same position respectively. The inside of the conductive through-hole is processed as a conductive through-hole, and the electrode pins on the front and back sides are correspondingly connected through the conductive through-hole. The four conductive through-holes are consistent in shape and size, and the diameter of the conductive hole is 0.80mm.

[0066] Conductive silver paste and / or conductive silver palladium paste are printed on the surfaces of the front electrode pin 1 and the back electrode pin 3 , and the thickness of the conductive silver paste is 10 μm.

[0067] The front electrode region 2 and the back electrode region 4 are further decorated with an electrode protection layer having a thickness of 10 μm and made of transparent glass glaze.

[0068] Four pins are welded and installed at the lower ends of the four electrode pins of the front electrode pin 1 to facilitate the use of the electrode.

[0069] Example 3

[0070] The utility model provides an oil product electrode capable of simultaneously detecting temperature and capacitance, comprising a silicon-based electrode substrate, with an electrode size of 32.00x11.76mm and a thickness of 1.00mm.

[0071] A front electrode area 2 and a front electrode pin 1 are provided on the front side of the substrate. The front electrode area 2 is provided with a front electrode layer. The front electrode layer includes a first electrode layer 21 and a second electrode layer 22, and is respectively connected to the first electrode pin 11 and the second electrode pin 12; the front electrode pin 1 includes a first electrode pin 11, a second electrode pin 12, a third electrode pin 13 and a fourth electrode pin 14.

[0072] Parallel and equidistant interdigitated strips are longitudinally arranged between the upper end of the first electrode layer 21 and the upper end of the second electrode layer 22. The interdigitated strips of the first electrode layer 21 are arranged in the gaps between the interdigitated strips of the second electrode layer 22, and the spacing distances are the same. There are a total of 24 pairs of interdigitated strips, and the width of the interdigitated strips and the spacing between them, that is, the line width and line spacing are 100μm and 100μm respectively.

[0073] The front electrode layer also includes a third electrode layer, which is correspondingly connected to the fourth electrode pin 14 . The third electrode layer is arranged below the area where the first electrode layer 21 and the second electrode layer 22 are located, and beside the line connecting the second electrode layer 22 and the second electrode pin 12 .

[0074] The metal pattern of the front electrode layer is modified with a gold film by a screen printing process to obtain a front gold electrode with a gold film thickness of 5 μm.

[0075] A back electrode area 4 and a back electrode pin 3 are provided on the back side of the substrate. The back electrode area 4 is provided with a back electrode layer. The back electrode layer includes a third electrode layer 41 and a fourth electrode layer 42, and is respectively connected to the sixth electrode pin 32 and the seventh electrode pin 33; the back electrode pin 3 includes a fifth electrode pin 31, a sixth electrode pin 32, a seventh electrode pin 33 and an eighth electrode pin 34.

[0076] A metal electrode layer is provided at the upper end of the third electrode layer (41), and the fourth electrode layer (42) is provided on the side of the third electrode layer (41); a connecting circuit (43) is provided between the third electrode layer (41) and the fourth electrode layer (42), and a surface of the connecting circuit is coated with a resistance paste, and the resistance value of the resistance paste is 1300±10%Ω.

[0077] The back electrode layer is modified with silver paste by screen printing process to obtain a back silver electrode with a silver layer thickness of 10 μm.

[0078] The back electrode is also provided with four electrode pins at the corresponding positions of the front electrode, and shares a conductive through-hole with the pins provided on the front electrode, wherein the fifth electrode pin 31 and the first electrode pin 11, the sixth electrode pin 32 and the second electrode pin 12, the seventh electrode pin 33 and the third electrode pin 13, and the eighth electrode pin 34 and the fourth electrode pin 14 are respectively provided at the same positions on the front and back sides, and a conductive through-hole is provided at the same position respectively. The inside of the conductive through-hole is processed as a conductive through-hole, and the electrode pins on the front and back sides are correspondingly connected through the conductive through-hole. The four conductive through-holes are consistent in shape and size, and the diameter of the conductive hole is 0.80mm.

[0079] Conductive silver paste and / or conductive silver palladium paste are printed on the surfaces of the front electrode pin 1 and the back electrode pin 3 , and the thickness of the conductive silver paste is 10 μm.

[0080] The front electrode region 2 and the back electrode region 4 are further decorated with an electrode protection layer having a thickness of 10 μm and made of transparent glass glaze.

[0081] Four pins are welded and installed at the lower ends of the four electrode pins of the front electrode pin 1 to facilitate the use of the electrode.

[0082] Example 4

[0083] The utility model provides an oil product electrode capable of simultaneously detecting temperature and capacitance, comprising a glass electrode substrate, an electrode size of 32.00x11.76mm, and a thickness of 1.00mm.

[0084] A front electrode area 2 and a front electrode pin 1 are provided on the front side of the substrate. The front electrode area 2 is provided with a front electrode layer. The front electrode layer includes a first electrode layer 21 and a second electrode layer 22, and is respectively connected to the first electrode pin 11 and the second electrode pin 12; the front electrode pin 1 includes a first electrode pin 11, a second electrode pin 12, a third electrode pin 13 and a fourth electrode pin 14.

[0085] Parallel and equidistant interdigitated strips are longitudinally arranged between the upper end of the first electrode layer 21 and the upper end of the second electrode layer 22. The interdigitated strips of the first electrode layer 21 are arranged in the gaps between the interdigitated strips of the second electrode layer 22, and the spacing distances are the same. There are a total of 30 pairs of interdigitated strips, and the width of the interdigitated strips and the spacing between them, that is, the line width and line spacing, are 50μm and 50μm respectively.

[0086] The front electrode layer also includes a third electrode layer, which is correspondingly connected to the fourth electrode pin 14 . The third electrode layer is arranged below the area where the first electrode layer 21 and the second electrode layer 22 are located, and beside the line connecting the second electrode layer 22 and the second electrode pin 12 .

[0087] The metal pattern of the front electrode layer is modified with a gold film by a screen printing process to obtain a front gold electrode with a gold film thickness of 5 μm.

[0088] A back electrode area 4 and a back electrode pin 3 are provided on the back side of the substrate. The back electrode area 4 is provided with a back electrode layer. The back electrode layer includes a third electrode layer 41 and a fourth electrode layer 42, and is respectively connected to the sixth electrode pin 32 and the seventh electrode pin 33; the back electrode pin 3 includes a fifth electrode pin 31, a sixth electrode pin 32, a seventh electrode pin 33 and an eighth electrode pin 34.

[0089] A metal electrode layer is provided at the upper end of the third electrode layer (41), and the fourth electrode layer (42) is provided on the side of the third electrode layer (41); a connecting circuit (43) is provided between the third electrode layer (41) and the fourth electrode layer (42), and a surface of the connecting circuit is coated with a resistance paste, and the resistance value of the resistance paste is 1300±10%Ω.

[0090] The back electrode layer is modified with silver paste by screen printing process to obtain a back silver electrode with a silver layer thickness of 10 μm.

[0091] The back electrode is also provided with four electrode pins at the corresponding positions of the front electrode, and shares a conductive through-hole with the pins provided on the front electrode, wherein the fifth electrode pin 31 and the first electrode pin 11, the sixth electrode pin 32 and the second electrode pin 12, the seventh electrode pin 33 and the third electrode pin 13, and the eighth electrode pin 34 and the fourth electrode pin 14 are respectively provided at the same positions on the front and back sides, and a conductive through-hole is provided at the same position respectively. The inside of the conductive through-hole is processed as a conductive through-hole, and the electrode pins on the front and back sides are correspondingly connected through the conductive through-hole. The four conductive through-holes are consistent in shape and size, and the diameter of the conductive hole is 0.80mm.

[0092] Conductive silver paste and / or conductive silver palladium paste are printed on the surfaces of the front electrode pin 1 and the back electrode pin 3 , and the thickness of the conductive silver paste is 10 μm.

[0093] The front electrode region 2 and the back electrode region 4 are further decorated with an electrode protection layer having a thickness of 10 μm and made of transparent glass glaze.

[0094] Four pins are welded and installed at the lower ends of the four electrode pins of the front electrode pin 1 to facilitate the use of the electrode.

[0095] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments but can be implemented in other embodiments without departing from the scope of the present application. The embodiments are therefore to be seen as exemplary and not restrictive, the scope of the present application being defined by the appended claims rather than by the above description, and all variations falling within the meaning and range of equivalents of the claims are therefore intended to be embraced therein.

[0096] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every implementation embodies only one independent technical solution, and the specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that a person skilled in the art can understand. The technical details not described in detail in the present application can be realized by any existing technology in the art. In particular, all technical features not described in detail in the present application can be realized by any existing technology.

Claims

1. An oil product electrode capable of simultaneously detecting temperature and capacitance, comprising an electrode substrate, characterized in that: The substrate is provided with a conductive through hole, and the front surface of the substrate is provided with a front electrode area (2) and a front electrode pin (1); the back surface of the substrate is provided with a back electrode area (4) and a back electrode pin (3); the upper end of the front electrode pin (1) and the upper end of the back electrode pin (3) are provided with the conductive through hole at the same position; the front electrode area (2) and the back electrode area (4) are also decorated with an electrode protection layer.

2. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 1, characterized in that: The front electrode pin (1) includes a first electrode pin (11), a second electrode pin (12), a third electrode pin (13) and a fourth electrode pin (14); the back electrode pin (3) includes a fifth electrode pin (31), a sixth electrode pin (32), a seventh electrode pin (33) and an eighth electrode pin (34).

3. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 2, characterized in that: The front electrode region (2) is provided with a front electrode layer, the front electrode layer comprising a first electrode layer (21) and a second electrode layer (22), and respectively connected to the first electrode pin (11) and the second electrode pin (12); the back electrode region (4) is provided with a back electrode layer, the back electrode layer comprising a third electrode layer (41) and a fourth electrode layer (42), and respectively connected to the sixth electrode pin (32) and the seventh electrode pin (33).

4. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 3, characterized in that: The upper end of the first electrode layer (21) and the upper end of the second electrode layer (22) are provided with interdigitated strips that are parallel and equidistant from each other, and the interdigitated strips of the first electrode layer (21) are arranged in the gaps between the interdigitated strips of the second electrode layer (22) and have the same spacing distance.

5. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 3, characterized in that: A metal electrode layer is provided at the upper end of the third electrode layer (41), and the fourth electrode layer (42) is provided on the side of the third electrode layer (41); the upper end of the third electrode layer (41) and the upper end of the fourth electrode layer (42) are connected via a connecting circuit (43), and the surface of the connecting circuit (43) is coated with a resistance paste.

6. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 3, characterized in that: The front electrode layer is modified with a gold layer, and the thickness of the gold layer is greater than 2 μm.

7. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 3, characterized in that: The back electrode layer is modified with a silver layer, and the thickness of the silver layer is 8 to 15 μm.

8. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 3, characterized in that: The front electrode layer also includes a third electrode layer, which is correspondingly connected to the fourth electrode pin (14), and the third electrode layer is arranged near the area where the first electrode layer (21) and the second electrode layer (22) are located.

9. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 5, characterized in that: The resistance value of the resistor paste is 1300±10%Ω.

10. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 5, characterized in that: The electrode protection layer modified on the back electrode area (4) does not cover the area where the connecting circuit (43) is located.

11. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 1, characterized in that: The surfaces of the front electrode pin (1) and the back electrode pin (3) are modified with metal paste, wherein the metal paste comprises conductive silver paste and conductive silver palladium paste; the thickness of the metal paste is 8 to 15 μm.

12. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 1, characterized in that: A pin is fixed to the lower end of the front electrode pin (1), and the pin can be fixed to the surface of the front electrode pin (1) using solder.

13. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 1, characterized in that: The thickness of the electrode protection layer is 8 to 15 μm.

14. The oil electrode capable of simultaneously detecting temperature and capacitance according to claim 1, characterized in that: The protective layer material includes glass glaze.

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