Thin film type thermocouple

Abstract

The utility model relates to the technical field of sensors, in particular to a thin film type thermocouple, which comprises a first insulating layer, an upper circuit layer, a lower circuit layer, a second insulating layer, a third insulating layer, a pair of leads and a connecting module, the upper circuit layer is fixedly arranged on the top surface of the first insulating layer; the lower circuit layer is fixedly arranged on the bottom surface of the first insulating layer; the second insulating layer is fixedly arranged on the bottom surface of the lower circuit layer; the third insulating layer is fixedly arranged on the top surface of the upper circuit layer; one end of one lead is electrically connected with the upper circuit layer, and one end of the other lead is electrically connected with the lower circuit layer; the connecting module is electrically connected with the upper circuit layer and the lower circuit layer. The temperature measuring device overcomes the defect of large occupied area of temperature measurement in the prior art, and has the characteristic of convenience in use.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a thin film thermocouple. Background Art

[0002] A thin film thermocouple is a thermoelectric sensor manufactured using thin film technology. It uses thin films of semiconductor materials or different metal materials to sense temperature changes and convert them into detectable electrical signals so that users can determine the temperature at the measurement location of the thin film thermocouple by detecting the electrical signals.

[0003] In the prior art, a Chinese utility model patent with authorization announcement number CN221764690U proposes a high-temperature resistant thin-film thermocouple sensor and an aircraft engine temperature measurement system, a thin-film thermocouple, comprising two pressed-together substrate modules, the substrate modules comprising a substrate, a thermocouple thin-film functional layer, and leads; one side of the substrate is a pressed-together surface, the pressed-together surface being provided with a lead groove, the lead groove being provided with a conductive paste and leads; the thermocouple thin-film functional layer is also provided on the pressed-together surface, the lead groove and the thermocouple thin-film functional layer being respectively located on both sides of the pressed-together surface, and when the two substrate modules are pressed-together, the two pressed-together surfaces are in contact with each other, the leads on any substrate module are opposite to the thermocouple thin-film functional layer on the other substrate module and are connected through the conductive paste, and the ends of the two thermocouple thin-film functional layers are overlapped and connected.

[0004] Since the first thermocouple thin film functional layer and the second thermocouple thin film functional layer of the above-mentioned thin film thermocouple are respectively arranged on the pressing surfaces of the first substrate and the second substrate, and no insulating layer is provided on the first thermocouple thin film functional layer or the second thermocouple thin film functional layer, when the first substrate and the second substrate are pressed together, the first thermocouple thin film functional layer and the second thermocouple thin film functional layer are on the same layer, resulting in the problem that the above-mentioned thin film thermocouple occupies a large area for temperature measurement. Utility Model Content

[0005] In order to solve the technical problem of large occupied area of ​​temperature measurement in the prior art, the present invention provides a thin film thermocouple, comprising: a first insulating layer, an upper circuit layer, a lower circuit layer, a second insulating layer, a third insulating layer, a pair of wires and a connection module;

[0006] The upper circuit layer is fixedly arranged on the top surface of the first insulating layer;

[0007] The lower circuit layer is fixedly arranged on the bottom surface of the first insulating layer;

[0008] The second insulating layer is fixedly arranged on the bottom surface of the lower circuit layer;

[0009] A third insulating layer is fixedly arranged on the top surface of the upper circuit layer;

[0010] One end of one of the wires is electrically connected to the upper circuit layer, and one end of the other wire is electrically connected to the lower circuit layer;

[0011] The connection module electrically connects the upper circuit layer and the lower circuit layer.

[0012] Furthermore, the connection module includes: a blind hole and a connection piece;

[0013] A blind hole is opened on the top surface of the third insulating layer, and the blind hole passes through the third insulating layer, the upper circuit layer and the first insulating layer in sequence, and the lower circuit layer is exposed in the inner cavity of the blind hole;

[0014] The connecting piece is fixedly arranged in the inner cavity of the blind hole, and the connecting piece electrically connects the upper circuit layer and the lower circuit layer.

[0015] Furthermore, the connecting piece is copper paste.

[0016] Furthermore, the aperture range of the blind hole is 0.1 mm to 0.5 mm.

[0017] Furthermore, the upper circuit layer and the lower circuit layer are circuit layers made of different metal materials.

[0018] Furthermore, the first insulating layer, the second insulating layer and the third insulating layer are all polyimide films.

[0019] Furthermore, the device further comprises: a pair of assembly modules and positioning members;

[0020] A pair of assembly modules are arranged at external positions to be detected, and a third insulating layer is located between the pair of assembly modules;

[0021] Both ends of the positioning member are respectively connected to a pair of assembly modules, and the bottom surface of the positioning member abuts against the top surface of the third insulating layer for pressing and positioning the third insulating layer.

[0022] Furthermore, the assembly module includes: a glue storage cylinder, a pressurizing component, an adhesive and an assembly component;

[0023] The glue storage cylinder is movably arranged on one side of the third insulating layer, the bottom of the glue storage cylinder adopts an open design, and the bottom port of the glue storage cylinder abuts against the outer surface of the position to be detected;

[0024] The adhesive is arranged in the inner cavity of the adhesive storage cylinder;

[0025] The pressurizing component is arranged on the glue storage cylinder, and is connected to the adhesive, and is used to drive the adhesive to extend out through the bottom port of the glue storage cylinder;

[0026] The assembly component is arranged on the glue storage barrel and is connected to the positioning piece, and is used for assembling one end of the positioning piece on the glue storage barrel.

[0027] Furthermore, the pressurizing assembly includes: a first screw hole, a hand screw and a piston;

[0028] The first screw hole is opened on the top of the rubber storage cylinder, and the first screw hole passes through the outer wall of the rubber storage cylinder and is connected with the inner cavity of the rubber storage cylinder;

[0029] The piston is movably arranged in the inner cavity of the rubber storage cylinder. The piston matches the radial cross-sectional shape of the inner cavity of the rubber storage cylinder. The piston is located between the adhesive and the top wall of the inner cavity of the rubber storage cylinder and is used to drive the adhesive to extend through the bottom port of the rubber storage cylinder.

[0030] The hand screw is inserted into the first screw hole, the hand screw is threadedly connected to the first screw hole, the driving end of the hand screw protrudes from the top surface of the glue storage cylinder, and the connecting end of the hand screw is rotatably connected to the piston.

[0031] Further, the assembly component includes: a second screw hole and a threaded protrusion;

[0032] A second screw hole is provided at one end of the positioning piece, and the rubber storage tube is plugged into the second screw hole;

[0033] The threaded protrusion is fixedly arranged on the circumferential side wall of the rubber storage cylinder, and the threaded protrusion is matched with the thread of the second screw hole.

[0034] The thin film thermocouple according to the embodiment of the present invention has the following beneficial effects:

[0035] 1. The device fixes the upper circuit layer and the lower circuit layer on the top surface and the bottom surface of the first insulating layer respectively, thereby stacking the upper circuit layer and the lower circuit layer, reducing the occupied area when detecting temperature, and solving the defect of large occupied area of ​​temperature measurement in the prior art.

[0036] 2. This device is provided with a pair of assembly modules and positioning parts, so that the user can press and fix the first insulating layer, the second insulating layer and the third insulating layer carrying the upper circuit layer and the lower circuit layer at the position to be detected, thereby enhancing the convenience of use of this device.

[0037] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A top view of an embodiment of the present invention (a pair of assembly modules and positioning members are omitted);

[0039] Figure 2 Schematic diagram of the assembly of the connection module according to an embodiment of the present utility model;

[0040] Figure 3 is a perspective view according to an embodiment of the present application;

[0041] Figure 4 is an assembly schematic view of the assembly module according to an embodiment of the present application.

[0042] Explanation of the drawings:

[0043] 1 - first insulation layer, 2 - upper circuit layer, 3 - lower circuit layer, 4 - second insulation layer, 5 - third insulation layer, 6 - wire, 7 - connecting module, 71 - blind hole, 72 - connecting piece, 8 - assembly module, 81 - glue storage cylinder, 821 - first screw hole, 822 - hand screw, 823 - piston, 831 - second screw hole, 832 - threaded protrusion, 9 - positioning piece. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, and the present application will be further described.

[0045] The foregoing and other technical contents, features and effects of the present application will be clearly presented in the detailed description of the embodiments below with reference to the accompanying drawings. The directions mentioned in the following embodiments, such as up, down, left, right, front or back, are only the directions of the drawings. Therefore, the directions used are used to explain and not to limit the present application, and in all embodiments, the same reference numerals represent the same elements.

[0046] First, the thin film type thermocouple according to an embodiment of the present application will be described. Figures 1 to 4 The thin film type thermocouple according to an embodiment of the present application is used to measure temperature and has a wide range of application scenarios.

[0047] As shown in Figure 1 , 2 , the thin film type thermocouple according to an embodiment of the present application comprises a first insulation layer 1, an upper circuit layer 2, a lower circuit layer 3, a second insulation layer 4, a third insulation layer 5, a pair of wires 6 and a connecting module 7.

[0048] Specifically, as shown in Figure 1 , 2As shown, the upper circuit layer 2 is fixedly arranged on the top surface of the first insulating layer 1. In this embodiment, the upper circuit layer 2 is a brass circuit layer; the lower circuit layer 3 is fixedly arranged on the bottom surface of the first insulating layer 1. In this embodiment, the upper circuit layer 2 is a constantan circuit layer; the second insulating layer 4 is fixedly arranged on the bottom surface of the lower circuit layer; the third insulating layer 5 is fixedly arranged on the top surface of the upper circuit layer; one end of one of the wires 6 is electrically connected to the upper circuit layer, and one end of the other wire 6 is electrically connected to the lower circuit layer; the connecting module 7 electrically connects the upper circuit layer and the lower circuit layer. In this embodiment, the upper circuit layer 2 and the lower circuit layer 3 are both fixedly arranged on the first insulating layer 1 by a hot pressing process, and the second insulating layer 4 and the third insulating layer 5 are also fixedly arranged on the bottom surface of the lower circuit layer 3 and the top surface of the upper circuit layer 2 by a hot pressing process.

[0049] Further, if Figure 1 、 2 As shown, the connection module 7 includes: a blind hole 71 and a connector 72; the blind hole 71 is opened on the top surface of the third insulating layer 5, and the blind hole 71 passes through the third insulating layer 5, the upper circuit layer and the first insulating layer 1 in sequence, and the lower circuit layer is exposed in the inner cavity of the blind hole 71; the connector 72 is fixedly arranged in the inner cavity of the blind hole 71, and the connector 72 electrically connects the upper circuit layer 2 and the lower circuit layer 3.

[0050] Further, if Figure 2 As shown, the connector 72 is copper paste.

[0051] Further, if Figure 2 As shown, the aperture range of the blind hole 71 is 0.1 mm to 0.5 mm.

[0052] Further, if Figure 2 As shown, the upper circuit layer 2 and the lower circuit layer 3 are circuit layers made of different metal materials.

[0053] Further, if Figure 2 As shown, the first insulating layer 1 , the second insulating layer 4 and the third insulating layer 5 are all polyimide films.

[0054] Further, if Figure 3 As shown, the device further comprises: a pair of assembly modules 8 and positioning members 9;

[0055] A pair of assembly modules 8 are arranged at the external position to be detected, and the third insulating layer 5 is located between the pair of assembly modules 8; the two ends of the positioning member 9 are respectively connected to the pair of assembly modules 8, and the bottom surface of the positioning member 9 abuts against the top surface of the third insulating layer 5, which is used to press and position the third insulating layer 5.

[0056] Further, if Figure 3 、 4As shown, the assembly module 8 includes: a glue storage cylinder 81, a pressurizing component, an adhesive (not shown in the figure) and an assembly component; the glue storage cylinder 81 is movably arranged on one side of the third insulating layer 5, and the bottom of the glue storage cylinder 81 adopts an open design, and the bottom port of the glue storage cylinder 81 abuts against the outer surface of the position to be detected; the adhesive is arranged in the inner cavity of the glue storage cylinder 81; the pressurizing component is arranged on the glue storage cylinder 81, and the pressurizing component is connected to the adhesive, and is used to drive the adhesive to extend out through the bottom port of the glue storage cylinder 81; the assembly component is arranged on the glue storage cylinder 81, and the assembly component is connected to the positioning member 9, and is used to assemble one end of the positioning member 9 on the glue storage cylinder 81.

[0057] Further, if Figure 3 、 4 As shown, the pressurizing assembly includes: a first screw hole 821, a hand screw 822 and a piston 823; the first screw hole 821 is opened at the top of the glue storage cylinder 81, and the first screw hole 821 passes through the outer wall of the glue storage cylinder 81 and is connected with the inner cavity of the glue storage cylinder 81; the piston 823 is movably arranged in the inner cavity of the glue storage cylinder 81, and the piston 823 matches the radial cross-sectional shape of the inner cavity of the glue storage cylinder 81. The piston 823 is located between the adhesive and the top wall of the inner cavity of the glue storage cylinder 81, and is used to drive the adhesive to extend through the bottom port of the glue storage cylinder 81; the hand screw 822 is inserted into the first screw hole 821, and the hand screw 822 is threadedly connected to the first screw hole 821. The driving end of the hand screw 822 protrudes from the top surface of the glue storage cylinder 81, and the hand screw The connecting end of 822 is rotatably connected to the piston 823. In this embodiment, the user can drive the hand screw 822 to rotate relative to the rubber storage barrel 81, thereby driving the piston 823 to move toward the bottom port of the rubber storage barrel 81, and finally achieve the purpose of using the piston 823 to push the adhesive stored in the inner cavity of the rubber storage barrel 81 out of the bottom port of the rubber storage barrel 81. When the viscosity of the adhesive located near the bottom port of the rubber storage barrel 81 weakens, the user can control the piston 823 to push the adhesive out of the bottom port of the rubber storage barrel 81 to a certain length, and then use a tool to cut off part of the adhesive extending out of the bottom port of the rubber storage barrel 81, so as to ensure that the adhesive located near the bottom port of the rubber storage barrel 81 has a certain strength of viscosity.

[0058] Further, if Figure 3 、 4 As shown, the assembly component includes: a second screw hole 831 and a threaded protrusion 832; the second screw hole 831 is opened at one end of the positioning member 9, and the rubber storage barrel 81 is plugged into the second screw hole 831; the threaded protrusion 832 is fixedly provided on the circumferential side wall of the rubber storage barrel 81, and the threaded protrusion 832 cooperates with the thread of the second screw hole 831. In this embodiment, the user can adjust the distance between the positioning member 9 and the bottom of the rubber storage barrel 81 by driving the rubber storage barrel 81 to rotate relative to the positioning member 9.

[0059] When the user fixes and assembles the device at the position to be detected, first, the user drives the hand screws 822 of a pair of assembly modules 8 to rotate relative to the glue storage cylinder 81, and then controls the piston 823 to push the adhesive stored in the inner cavity of the glue storage cylinder 81 out through the bottom port of the glue storage cylinder 81. Then, the user places the first insulating layer 1, the second insulating layer 4 and the third insulating layer 5 carrying the upper circuit layer 2 and the lower circuit layer 3 at the position to be detected. Next, the user places the positioning member 9 equipped with a pair of assembly modules 8 on the top of the third insulating layer 5, so that the first insulating layer 1, the second insulating layer 4 and the third insulating layer 5 carrying the upper circuit layer 2 and the lower circuit layer 3 are all located between the pair of assembly modules 8, and the adhesive protruding from the bottom port of the glue storage cylinder 81 of the pair of assembly modules 8 is bonded to the outer surface of the position to be detected, so that the first insulating layer 1, the second insulating layer 4 and the third insulating layer 5 carrying the upper circuit layer 2 and the lower circuit layer 3 are pressed and fixed at the position to be detected.

[0060] Above, refer to Figures 1 to 4 The thin film thermocouple according to the embodiment of the present invention has the following beneficial effects:

[0061] 1. The device fixes the upper circuit layer and the lower circuit layer on the top surface and the bottom surface of the first insulating layer respectively, thereby stacking the upper circuit layer and the lower circuit layer, reducing the occupied area when detecting temperature, and solving the defect of large occupied area of ​​temperature measurement in the prior art.

[0062] 2. This device is convenient for users to press and fix the first insulating layer, the second insulating layer and the third insulating layer carrying the upper circuit layer and the lower circuit layer at the position to be detected by providing a pair of assembly modules and positioning parts, which is easy to use.

[0063] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0064] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A thin film thermocouple, characterized in that: It comprises: a first insulating layer, an upper circuit layer, a lower circuit layer, a second insulating layer, a third insulating layer, a pair of wires and a connection module; The upper circuit layer is fixedly arranged on the top surface of the first insulating layer; The lower circuit layer is fixedly arranged on the bottom surface of the first insulating layer; The second insulating layer is fixedly arranged on the bottom surface of the lower circuit layer; The third insulating layer is fixedly arranged on the top surface of the upper circuit layer; One end of one of the wires is electrically connected to the upper circuit layer, and one end of the other wire is electrically connected to the lower circuit layer; The connection module electrically connects the upper circuit layer and the lower circuit layer.

2. The thin film thermocouple according to claim 1, wherein The connection module includes: a blind hole and a connecting piece; The blind hole is opened on the top surface of the third insulating layer, and the blind hole passes through the third insulating layer, the upper circuit layer and the first insulating layer in sequence, and the lower circuit layer is exposed in the inner cavity of the blind hole; The connecting member is fixedly disposed in the inner cavity of the blind hole, and the connecting member electrically connects the upper circuit layer and the lower circuit layer.

3. The thin film thermocouple according to claim 2, wherein: The connecting piece is copper paste.

4. The thin film thermocouple according to claim 2, wherein: The aperture range of the blind hole is 0.1mm~0.5mm.

5. The thin film thermocouple according to claim 1, wherein: The upper circuit layer and the lower circuit layer are circuit layers made of different metal materials.

6. The thin film thermocouple according to claim 1, wherein: The first insulating layer, the second insulating layer and the third insulating layer are all polyimide films.

7. The thin film thermocouple according to claim 1, wherein: Also included: a pair of assembly modules and positioning pieces; The pair of assembly modules are arranged at external positions to be detected, and the third insulating layer is located between the pair of assembly modules; Both ends of the positioning member are respectively connected to the pair of assembly modules, and the bottom surface of the positioning member abuts against the top surface of the third insulating layer for pressing and positioning the third insulating layer.

8. The thin film thermocouple according to claim 7, wherein: The assembly module includes: a glue storage cylinder, a pressurizing component, an adhesive and an assembly component; The rubber storage cylinder is movably arranged on one side of the third insulating layer, the bottom of the rubber storage cylinder adopts an open design, and the bottom port of the rubber storage cylinder abuts against the outer surface of the position to be detected; The adhesive is arranged in the inner cavity of the glue storage cylinder; The pressurizing component is provided on the glue storage cylinder, and is connected to the adhesive, and is used to drive the adhesive to extend out through the bottom port of the glue storage cylinder; The assembly component is arranged on the rubber storage cylinder, and the assembly component is connected to the positioning member, and is used to assemble one end of the positioning member on the rubber storage cylinder.

9. The thin film thermocouple according to claim 8, wherein: The pressurizing assembly comprises: a first screw hole, a hand screw and a piston; The first screw hole is opened at the top of the rubber storage cylinder, and the first screw hole passes through the outer wall of the rubber storage cylinder and communicates with the inner cavity of the rubber storage cylinder; The piston is movably disposed in the inner cavity of the rubber storage cylinder, the piston matches the radial cross-sectional shape of the inner cavity of the rubber storage cylinder, and the piston is located between the adhesive and the top wall of the inner cavity of the rubber storage cylinder, and is used to drive the adhesive to extend out through the bottom port of the rubber storage cylinder; The hand screw is inserted into the first screw hole, the hand screw is threadedly connected to the first screw hole, the driving end of the hand screw protrudes from the top surface of the rubber storage cylinder, and the connecting end of the hand screw is rotatably connected to the piston.

10. The thin film thermocouple according to claim 8, wherein: The assembly component comprises: a second screw hole and a threaded protrusion; The second screw hole is provided at one end of the positioning member, and the rubber storage cylinder is plugged into the second screw hole; The threaded protrusion is fixedly arranged on the circumferential side wall of the rubber storage cylinder, and the threaded protrusion is matched with the thread of the second screw hole.

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