Strain detection module, assembly method of strain detection module and use method thereof

Abstract

The present invention discloses a strain detection module, an assembly method of the strain detection module and a method of using the strain detection module, wherein the strain detection module includes a strain gauge assembly and a protection assembly, the strain gauge assembly is used to detect the strain value of a test piece, and includes a fixing portion connected to the test piece, the protection assembly includes a protection layer, the first surface of the first protection layer is connected to the strain gauge assembly, and a pre-positioning layer is also provided on the first surface, and the pre-positioning layer can be pre-positioned on the surface of the test piece, and the second protection layer is removably connected to the pre-positioning layer, including a first peeling layer and a second peeling layer, one end of the first peeling layer and one end of the second peeling layer are both arranged on the pre-positioning layer close to the strain gauge assembly, and the first peeling layer and the second peeling layer have free ends extending toward each other, and the two free ends overlap each other and cover the strain gauge assembly. The strain detection module of the embodiment of the present invention can connect the strain gauge assembly to the test piece and improve the accuracy and reliability of the strain gauge assembly when connected.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic equipment, and in particular relates to a strain detection module, an assembly method of the strain detection module and a use method thereof. Background Art

[0002] The strain detection module is a component that detects the strain of the test piece. It is mainly composed of structures such as a strain gauge assembly and a protection assembly. Among them, the strain gauge assembly is an electronic component composed of a sensitive grid, etc. By bonding the strain gauge assembly to the surface of the test piece, the strain of the test piece can be measured and detected. It is widely used in aerospace, construction, machinery and other fields.

[0003] However, the current bonding steps of the strain gauge assembly are relatively cumbersome. The strain gauge and the terminal block need to be bonded to the test piece separately, and the strain gauge, the terminal block and the test piece are bonded with 502 glue or epoxy resin glue. The initial reliability of bonding is poor, and problems such as sliding and debonding are very likely to occur during manual bonding. If deviations are found in the bonding position and bonding angle of the strain gauge assembly after bonding is completed, the position of the strain gauge assembly cannot be adjusted, which reduces the accuracy and reliability of the installation position of the strain gauge assembly. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a strain detection module, which can reduce the bonding steps of the strain gauge assembly and improve the accuracy and reliability of the installation of the strain gauge assembly, solving the technical problems in the prior art that the bonding steps of the strain gauge assembly are cumbersome and the position of the strain gauge assembly cannot be adjusted.

[0005] A second objective of the present invention is to provide an assembly method for a strain detection module.

[0006] A third objective of the present invention is to provide a method for using a strain detection module.

[0007] A strain detection module according to an embodiment of the present invention includes: a strain gauge assembly, the strain gauge assembly is used to detect the strain value of a test piece, the strain gauge assembly includes a fixing portion connected to the test piece; a protection assembly includes: a first protection layer, a first surface of the first protection layer is connected to the strain gauge assembly, a pre-positioning layer is also provided on the first surface of the first protection layer, and the pre-positioning layer can be pre-positioned on the surface of the test piece; a second protection layer, the second protection layer is removably connected to the pre-positioning layer; the second protection layer includes a first peeling layer and a second peeling layer, one end of the first peeling layer and one end of the second peeling layer are both provided on the pre-positioning layer close to the strain gauge assembly, the first peeling layer and the second peeling layer both have free ends extending toward each other, and the two free ends overlap each other and cover the strain gauge assembly.

[0008] According to the strain detection module of the embodiment of the present invention, by connecting the strain gauge assembly to the first surface of the first protective layer, and a pre-positioning layer is also provided on the first surface of the first protective layer, the strain gauge assembly can be connected to the to-be-tested piece through the pre-positioning layer to achieve pre-positioning of the strain gauge assembly. At this time, if it is found that the bonding position or bonding angle of the strain gauge assembly deviates, the staff can use the pre-positioning layer to repeatedly adjust the position of the strain gauge assembly until the strain gauge assembly is accurately positioned in the to-be-tested area of ​​the to-be-tested piece, thereby improving the position accuracy and reliability of the bonding of the strain gauge assembly. The strain gauge assembly is also provided with a fixing portion connected to the to-be-tested piece. When the bonding position of the strain gauge assembly is determined, the strain gauge assembly is connected to the to-be-tested piece through the fixing portion, thereby improving the position stability of the strain gauge assembly. The strain gauge assembly can measure and detect the strain of the to-be-tested piece, and reduces the step of bonding the strain gauge assembly and the to-be-tested piece with 502 glue or epoxy resin glue. On the one hand, uneven bonding will not occur, and on the other hand, the bonding efficiency of the strain gauge assembly can be improved.

[0009] According to the strain detection module of one embodiment of the present invention, the pre-positioning layer includes an adsorbable surface composed of a plurality of vacuum suction cups.

[0010] According to a strain detection module of one embodiment of the present invention, the pre-positioning layer includes a pressure-sensitive adhesive layer, and after the first peeling layer and the second peeling layer are removed from the pre-positioning layer, the pressure-sensitive adhesive layer can be repeatedly bonded and adjusted to a pre-positioning position on the surface of the test piece.

[0011] Optionally, the fixing portion is a light-curing adhesive layer, which is cured after being irradiated with light and connected to the test piece; the second protective layer is a light-impermeable layer, and the first protective layer is a light-transmitting layer.

[0012] Optionally, the protection component further includes a third protection layer, the first protection layer is provided with a second surface, the second surface is arranged parallel to and spaced from the first surface, the third protection layer is provided on the second surface, and the third protection layer is an opaque layer.

[0013] Optionally, the light-proof layer is a light-proof film.

[0014] According to a strain detection module of one embodiment of the present invention, the free ends of the first peeling layer and the second peeling layer can swing relative to the first protective layer, an assembly channel is formed between the first peeling layer and the second peeling layer, and the strain gauge assembly can be connected to the first protective layer through the assembly channel.

[0015] According to a strain detection module of one embodiment of the present invention, the strain gauge assembly includes: a resistive strain gauge, which is used to detect the strain value of the test piece and on which the fixing portion is provided; a wiring terminal, on which the output end of the resistive strain gauge is welded; and a wire, one end of which is connected to the wiring terminal and the other end of which extends out of the protection assembly and is connected to a data acquisition system.

[0016] Optionally, the wiring terminal includes a fixing plate and a plurality of connecting plates, wherein the plurality of connecting plates are arranged on the fixing plate, one end of the connecting plate is connected to the output end of the resistive strain gauge, and the other end of the connecting plate is connected to the wire.

[0017] Optionally, the connecting sheet is a conductive sheet, the fixing plate is a transparent insulating plate, the fixing portion is provided on a side of the fixing plate away from the connecting sheet, and the fixing portion is a photocurable adhesive layer.

[0018] According to an embodiment of the present invention, an assembly method of a strain detection module includes the following steps: welding a resistive strain gauge and a wire to a connecting sheet respectively; adding a fixing portion on a side of a fixing plate away from the connecting sheet, and adding a fixing portion on one side of the resistive strain gauge to form a strain gauge assembly; removably connecting a first peeling layer and a second peeling layer of a second protective layer to a first surface of a first protective layer respectively, and forming an assembly channel between the first peeling layer and the second peeling layer; removably connecting a third protective layer to a second surface of the first protective layer; and connecting the strain gauge assembly to the first protective layer through the assembly channel.

[0019] According to the assembly method of the strain detection module of the embodiment of the present invention, by adding a fixing part on one side of the fixing plate and one side of the resistive strain gauge, the strain detection module can be connected to the test piece through the fixing part during the subsequent use of the strain detection module, thereby improving the position stability of the strain detection module, reducing the connection steps of the strain detection module, and improving the connection efficiency. An assembly channel is formed on the second protective layer, and the assembly channel provides an avoidance space for the installation of the strain gauge assembly, ensuring that the strain gauge assembly can be connected to the first protective layer through the assembly channel. At this time, the first protective layer, the second protective layer and the third protective layer cooperate to protect the strain gauge assembly and the fixing part on the strain gauge assembly, ensuring that the strain gauge assembly can be stably connected to the test piece through the fixing part, so as to perform strain detection on the test piece.

[0020] A method for using a strain detection module according to an embodiment of the present invention comprises the following steps: cleaning the surface of a test piece; removing a first peeling layer and a second peeling layer from a first protective layer, so that a pre-positioning layer on the first protective layer faces the test piece, and a fixing portion of a strain gauge assembly faces the test piece; contacting the pre-positioning layer with the test piece and adjusting the position of the strain detection module to connect the pre-positioning layer to the test piece; tearing off a third protective layer from the first protective layer to expose the first protective layer; irradiating the strain detection module with ultraviolet light to ensure that the fixing portion is cured and connected to the test piece; and the strain gauge assembly detects the strain value of the test piece.

[0021] According to the method for using the strain detection module of the embodiment of the present invention, the first peeling layer and the second peeling layer are removed from the first protective layer to facilitate the leakage of the pre-positioning layer on the first protective layer. At this time, the strain detection module can be positioned on the test piece through the pre-positioning layer, and the position of the strain detection module relative to the test piece can be adjusted through the pre-positioning layer, so that the bonding position of the strain detection module is accurate. When the strain detection module is accurately positioned in the test area of ​​the test piece, the third protective layer is torn off from the first protective layer to expose the first protective layer. At this time, ultraviolet light is used to irradiate the strain detection module so that the fixing part is cured to stably connect the strain detection module to the test piece, thereby reducing the connection steps between the strain detection module and the test piece and improving the connection efficiency.

[0022] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 FIG. 4 is a schematic structural diagram of a strain detection module according to an embodiment of the present invention.

[0025] Figure 2 FIG. 4 is a perspective view of a strain detection module according to an embodiment of the present invention.

[0026] Figure 3 FIG. 4 is an exploded diagram of a strain detection module according to an embodiment of the present invention.

[0027] Figure 4 An exploded view of a protection component according to an embodiment of the present invention.

[0028] Figure 5 FIG. 4 is an exploded view of a strain gauge assembly according to an embodiment of the present invention.

[0029] Figure 6 The figure is a flow chart of an assembly method of a strain detection module according to an embodiment of the present invention.

[0030] Figure 7 The figure is a flow chart of a method for using a strain detection module according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1000. strain detection module;

[0033] 100. Strain gauge assembly;

[0034] 110. resistance strain gauge; 111. fixing portion; 112. output end;

[0035] 120, terminal block; 121, fixing plate; 122, connecting piece;

[0036] 130. Wire;

[0037] 200, protection components;

[0038] 210, first protective layer; 211, pre-positioning layer; 2111, pressure-sensitive adhesive layer;

[0039] 220, second protective layer; 221, first peeling layer; 222, second peeling layer; 223, free end;

[0040] 230, the third protective layer;

[0041] 240. Assembly channel. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] The strain detection module 1000 according to the embodiment of the present invention is described below with reference to the accompanying drawings.

[0045] A strain detection module 1000 according to an embodiment of the present invention is as follows: Figure 1 and Figure 2 As shown, it includes: a strain gauge assembly 100 and a protection assembly 200.

[0046] The strain gauge assembly 100 is used to detect the strain value of the test piece (not shown in the figure), such as Figure 3 As shown, the strain gauge assembly 100 includes a fixing portion 111 connected to the test piece.

[0047] Combination Figure 1 and Figure 3 As shown, the protection assembly 200 includes a first protection layer 210 and a second protection layer 220 , and a first surface of the first protection layer 210 is connected to the strain gauge assembly 100 .

[0048] like Figure 3 As shown, a pre-positioning layer 211 is also provided on the first surface of the first protective layer 210 , and the pre-positioning layer 211 can be pre-positioned on the surface of the test piece. In other words, the pre-positioning layer 211 and the strain gauge assembly 100 are located on the same surface of the first protective layer 210 .

[0049] The second protective layer 220 is removably connected to the pre-positioning layer 211. Here, it means that the second protective layer 220 is connected to the pre-positioning layer 211 and can be removed from the pre-positioning layer 211.

[0050] like Figure 3 As shown, the second protective layer 220 includes a first peeling layer 221 and a second peeling layer 222, one end of the first peeling layer 221 and one end of the second peeling layer 222 are both arranged on the pre-positioning layer 211 close to the strain gauge assembly 100, and the first peeling layer 221 and the second peeling layer 222 both have free ends 223 extending toward each other, and the two free ends 223 overlap each other and cover the strain gauge assembly 100.

[0051] It can be seen from the above structure that the strain detection module 1000 of the embodiment of the present invention, by setting the fixing portion 111 on the strain gauge assembly 100, the strain gauge assembly 100 can be directly connected to the test piece through the fixing portion 111, thereby reducing the bonding steps of the strain gauge assembly 100 and the test piece, improving the bonding efficiency of the strain gauge assembly 100, and the fixing portion 111 can also ensure that the position of the strain gauge assembly 100 relative to the test piece is stable. When the strain gauge assembly 100 detects the strain value of the test piece, the detection efficiency and detection accuracy of the strain gauge assembly 100 can be improved.

[0052] By providing a protection component 200, and the protection component 200 includes a first protection layer 210 and a second protection layer 220, the strain gauge assembly 100 is connected to the first protection layer 210. On the one hand, the first protection layer 210 is used to limit the position of the strain gauge assembly 100, so that the position of the strain gauge assembly 100 relative to the protection component 200 is stable; on the other hand, the first protection layer 210 can also protect the strain gauge assembly 100, ensuring that external sharp objects will not fall on the strain gauge assembly 100 to damage the strain gauge assembly 100, and external foreign objects will not fall on the strain gauge assembly 100 to contaminate the strain gauge assembly 100, thereby extending the service life of the strain gauge assembly 100.

[0053] A pre-positioning layer 211 is provided on the first surface of the first protective layer 210. Since the strain gauge assembly 100 is also connected to the first surface of the first protective layer 210, when the first surface of the first protective layer 210 is pre-positioned on the surface of the test piece through the pre-positioning layer 211, the strain gauge assembly 100 is also pre-positioned on the surface of the test piece. If the position or angle of the strain gauge assembly 100 is found to be tilted after the pre-positioning is completed, the position of the strain gauge assembly 100 can be adjusted by using the pre-positioning layer 211 until the strain gauge assembly 100 is positioned at a suitable position, so that the strain detection module 1000 of the present application has a deviation correction property.

[0054] The first surface of the first protective layer 210 mentioned above refers to a side of the first protective layer 210 close to the second protective layer 220. In the process of connecting the strain gauge assembly 100 to the test piece, the first surface of the first protective layer 210 faces the test piece. When the first protective layer 210 moves toward the test piece, the pre-positioning layer 211 contacts the test piece to pre-position the strain detection module 1000 on the surface of the test piece.

[0055] It should be noted that the present application stably connects the strain gauge assembly 100 to the test piece by cooperating with the pre-positioning layer 211 and the fixing part 111. When the strain gauge assembly 100 is actually connected, the pre-positioning layer 211 is first used to position the strain gauge assembly 100 to ensure that the strain gauge assembly 100 is accurately positioned in the detection area of ​​the test piece. After the positioning of the strain gauge assembly 100 is completed, the strain gauge assembly 100 is connected to the test piece by the fixing part 111. It can be seen that the pre-positioning layer 211 mainly ensures that the position of the strain gauge assembly 100 relative to the test piece is adjustable, and the fixing part 111 mainly ensures that the position of the strain gauge assembly 100 relative to the test piece is fixed.

[0056] When the second protective layer 220 is connected to the pre-positioning layer 211, the second protective layer 220 can protect the pre-positioning layer 211 to ensure that foreign matter does not fall on the pre-positioning layer 211 and affect the performance of the pre-positioning layer 211; and the second protective layer 220 is removably connected to the pre-positioning layer 211. The removable mentioned here means that the second protective layer 220 can be separated from the pre-positioning layer 211 to leak out the pre-positioning layer 211. When the strain gauge assembly 100 needs to be connected to the test piece, the second protective layer 220 is removed from the pre-positioning layer 211 to expose the pre-positioning layer 211, so as to facilitate pre-positioning the strain detection module 1000 on the surface of the test piece through the pre-positioning layer 211.

[0057] One end of the first peeling layer 221 and one end of the second peeling layer 222 are disposed on the pre-positioning layer 211 , that is, the second protective layer 220 is disposed on the pre-positioning layer 211 , and the first peeling layer 221 and the second peeling layer 222 cooperate to protect the pre-positioning layer 211 .

[0058] Free ends 223 extending toward each other are provided on the first peeling layer 221 and the second peeling layer 222. The free ends 223 mentioned here mean that the other end of the first peeling layer 221 and the other end of the second peeling layer 222 are not connected to the pre-positioning layer 211 to form the free ends 223. The first peeling layer 221 and the second peeling layer 222 can be removed from the pre-positioning layer 211 through the free ends 223 to leak out of the pre-positioning layer 211.

[0059] The two free ends 223 overlap with each other and cover the strain gauge assembly 100. It can be understood that when one end of the first peeling layer 221 and one end of the second peeling layer 222 are arranged on the pre-positioning layer 211, the other end of the first peeling layer 221 and the other end of the second peeling layer 222 overlap and cover the strain gauge assembly 100. At this time, the two free ends 223 cooperate to protect the strain gauge assembly 100 and extend the service life of the strain gauge assembly 100.

[0060] It can be understood that the strain detection module 1000 of the present application is provided with a pre-positioning layer 211 and a fixing part 111 relative to the prior art. First, the strain gauge assembly 100 can be pre-positioned through the pre-positioning layer 211. When it is found that the position or angle of the strain gauge assembly 100 is tilted after the pre-positioning, the position of the strain gauge assembly 100 can be adjusted at any time through the pre-positioning layer 211, which has the function of correcting deviation. After the position of the strain gauge assembly 100 is determined, the fixing part 111 stably connects the strain gauge assembly 100 to the test piece, thereby reducing the connection steps of the strain gauge assembly 100.

[0061] It should be noted that the first surface of the first protective layer 210 of the present application is connected to the strain gauge assembly 100 and the pre-positioning layer 211 at the same time, and the second protective layer 220 is connected to the pre-positioning layer 211 and is arranged away from the first surface of the first protective layer 210, so that the strain gauge assembly 100 and the pre-positioning layer 211 are located between the first protective layer 210 and the second protective layer 220. The first protective layer 210 and the second protective layer 220 cooperate to protect the strain gauge assembly 100 and the pre-positioning layer 211. On the one hand, it is ensured that foreign matter will not fall into the pre-positioning layer 211 and cause contamination to the pre-positioning layer 211, and that when the second protective layer 220 is removed from the pre-positioning layer 211, the strain detection module 1000 can be pre-positioned on the surface of the test piece through the pre-positioning layer 211; on the other hand, it is ensured that external sharp objects will not fall on the strain gauge assembly 100 and cause damage to the strain gauge assembly 100, so as to ensure that the strain gauge assembly 100 can accurately detect the strain value of the test piece.

[0062] Optionally, in order to ensure that the strain gauge assembly 100 can be stably pre-positioned on the surface of the test piece through the pre-positioning layer 211, the present application provides two pre-positioning layers 211, and the two pre-positioning layers 211 are simultaneously provided on the first surface of the first protective layer 210 and located on opposite sides of the strain gauge assembly 100.

[0063] In order to protect the pre-positioning layer 211, the present application sets the second protective layer 220 to be composed of a first peeling layer 221 and a second peeling layer 222. The first peeling layer 221 and the second peeling layer 222 can also form free ends 223 at positions facing each other while ensuring that the two pre-positioning layers 211 are covered. On the first hand, the first peeling layer 221 and the second peeling layer 222 can be smoothly removed from the pre-positioning layer 211 through the free ends 223 to leak out the pre-positioning layer 211; on the second hand, when the two free ends 223 extend in a direction close to each other, the two free ends 223 overlap with each other and cover the strain gauge assembly 100 to protect the strain gauge assembly 100 and extend the service life of the strain gauge assembly 100; on the third hand, when the two free ends 223 extend in a direction away from each other, an assembly channel 240 is formed between the two free ends 223 to avoid the strain gauge assembly 100 and ensure that the strain gauge assembly 100 can be connected to the first protective layer 210 through the assembly channel 240.

[0064] Optionally, the sum of the projected areas of the first peeling layer 221 and the second peeling layer 222 on the horizontal plane is greater than the projected area of ​​the first protective layer 210 on the same horizontal plane. When the side edges of one end of the first peeling layer 221 connected to the first protective layer 210 overlap with the first protective layer 210 and the side edges of the other end of the second peeling layer 222 connected to the first protective layer 210 overlap with the first protective layer 210, it is ensured that the free ends 223 of the first peeling layer 221 and the second peeling layer 222 extending toward each other can overlap to cover the strain gauge assembly 100.

[0065] Of course, in some other examples, the sum of the projected areas of the first peeling layer 221 and the second peeling layer 222 on the horizontal plane may also be equal to the projected area of ​​the first protective layer 210 on the same horizontal plane. In this way, when the side edge of one end of the first peeling layer 221 connected to the first protective layer 210 overlaps with the first protective layer 210 and the side edge of the other end of the second peeling layer 222 connected to the first protective layer 210 overlaps with the first protective layer 210, although the free ends 223 of the first peeling layer 221 and the second peeling layer 222 extending toward each other cannot overlap, the side edges of the two free ends 223 facing each other can contact, which can also play a role in protecting the strain gauge assembly 100.

[0066] Optionally, the fixing portion 111 is located on one side of the strain gauge assembly 100 and is arranged away from the first protective layer 210, to ensure that when the strain gauge assembly 100 is pre-positioned on the surface of the test piece through the pre-positioning layer 211, the fixing portion 111 is arranged toward the surface of the test piece to be tested, to ensure that the subsequent strain gauge assembly 100 can be connected to the test piece through the fixing portion 111.

[0067] In some embodiments of the present invention, the pre-positioning layer 211 includes an adsorbable surface composed of a plurality of vacuum suction cups (not shown in the figure). On the one hand, the second protective layer 220 is connected to the pre-positioning layer 211 through the adsorbable surface, and ensures that the second protective layer 220 is removable relative to the pre-positioning layer 211; on the other hand, after the second protective layer 220 is removed from the pre-positioning layer 211, the strain detection module 1000 can be adsorbed on the surface of the test piece through a plurality of vacuum suction cups to achieve the pre-positioning of the strain detection module 1000. The vacuum suction cup has the advantages of being environmentally friendly and not damaging the test piece, and can be repeatedly adsorbed on the surface of the test piece to adjust the pre-positioning position of the strain detection module 1000 on the surface of the test piece, so that the strain detection module 1000 has a correction property, and improves the position accuracy and reliability of the strain gauge assembly 100 when connected.

[0068] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0069] In some embodiments of the present invention, Figure 4 As shown, the pre-positioning layer 211 includes a pressure-sensitive adhesive layer 2111 . After the first peeling layer 221 and the second peeling layer 222 are removed from the pre-positioning layer 211 , the pressure-sensitive adhesive layer 2111 can be repeatedly bonded and adjusted to the pre-positioning position on the surface of the test piece. Pressure-sensitive adhesive is a peelable adhesive that will not dry out for a long time, can maintain a certain adhesion, and can be used repeatedly. Therefore, in the present application, the pre-positioning layer 211 is set as a pressure-sensitive adhesive layer 2111. When the first peeling layer 221 and the second peeling layer 222 are removed from the pre-positioning layer 211, the pressure-sensitive adhesive layer 2111 leaks out, and the strain detection module 1000 is pre-positioned on the surface of the test piece through the pressure-sensitive adhesive layer 2111. Because the pressure-sensitive adhesive layer 2111 can maintain a certain adhesion, it is ensured that the position of the strain gauge assembly 100 relative to the test piece is stable, and it is also possible to intuitively observe whether there is a position deviation of the strain gauge assembly 100 relative to the test piece. When it is observed that the position of the strain gauge assembly 100 relative to the test piece deviates, because the pressure-sensitive adhesive layer 2111 will not dry out for a long time, the strain detection module 1000 can be torn off the test piece and the position of the strain detection module 1000 can be adjusted to accurately bond the strain gauge assembly 100 to the test area of ​​the test piece.

[0070] Optionally, during the actual production of the strain detection module 1000 , a layer of pressure-sensitive adhesive may be sprayed locally on the first surface of the first protective layer 210 to form a pressure-sensitive adhesive layer 2111 .

[0071] Optionally, the fixing portion 111 is a photocurable adhesive layer, which is cured after being exposed to light and connected to the test piece. That is to say, the fixing portion 111 will not be cured when not exposed to light. At this time, the strain gauge assembly 100 is only positioned on the test piece through the pre-positioning layer 211, and the strain gauge assembly 100 can also adjust its position relative to the test piece. When the position of the strain gauge assembly 100 is determined, the characteristics of the photocurable adhesive layer are used to stably connect the strain gauge assembly 100 to the test piece, so that the position of the strain gauge assembly 100 relative to the test piece is stable, and the strain value of the test piece can be effectively detected, and the accuracy of the detection is improved.

[0072] Optionally, a photocurable resin is sprayed on the surface of the strain gauge assembly 100 to form a photocurable adhesive layer. The photocurable resin, also known as a photosensitive resin, is an oligomer that can undergo physical and chemical changes rapidly in a short period of time after being irradiated with light, and then cross-linked and cured. It has the advantages of fast curing speed, high production efficiency, high energy utilization, low organic volatiles, environmental friendliness, and suitability for coating various substrates (paper, plastic, leather, metal, glass, ceramics, etc.). Therefore, the photocurable resin is sprayed on the surface of the strain gauge assembly 100. When the strain gauge assembly 100 is positioned on the test piece through the pre-positioning layer 211, the strain detection module 1000 can be irradiated with external light to cure the fixing portion 111, so that the strain gauge assembly 100 is connected to the test piece to facilitate the detection of the strain value of the test piece.

[0073] Optionally, the second protective layer 220 is a light-proof layer. Since the fixing portion 111 is a light-curing adhesive layer, it will be cured and connected to the test piece after being exposed to light. Therefore, in order to prevent the fixing portion 111 from being cured prematurely due to the influence of external light, the second protective layer 220 is set as a light-proof layer in the present application to ensure that the external light will not irradiate the fixing portion 111 during the movement of the strain detection module 1000, causing the fixing portion 111 to cure prematurely.

[0074] Optionally, the light-proof layer is a light-proof film. That is, the second protective layer 220 can be a light-proof film, which is connected to the pre-positioning layer 211 and located on one side of the strain gauge assembly 100 to cover the strain gauge assembly 100. The light-proof film can block external light, ensuring that when the second protective layer 220 is not removed from the pre-positioning layer 211, external light will not irradiate the fixing portion 111 of the strain gauge assembly 100 and cause the fixing portion 111 to cure prematurely.

[0075] Of course, in some other embodiments, the opaque layer may also be opaque glass or opaque tin foil, etc., as long as the second protective layer 220 is connected to the pre-positioning layer 211 and external light does not irradiate the fixing portion 111 of the strain gauge assembly 100 and cause the fixing portion 111 to solidify prematurely.

[0076] Optionally, the first protective layer 210 is a light-transmitting layer. Since the strain gauge assembly 100 is connected to the first surface of the first protective layer 210, and the fixing portion 111 on the strain gauge assembly 100 is a light-curing adhesive layer, the first protective layer 210 is set as a light-transmitting layer mainly to ensure that when the strain gauge assembly 100 is positioned by the pre-positioning layer 211, external light can be irradiated on the fixing portion 111 through the first protective layer 210, so that the fixing portion 111 is cured to connect the strain gauge assembly 100 to the test piece, simplifying the bonding steps of the strain gauge assembly 100, and the curing of the fixing portion 111 can stabilize the position of the strain gauge assembly 100 relative to the test piece, effectively detect the strain value of the test piece, and improve the accuracy of the detection.

[0077] Optionally, a light-transmitting plastic film may be used for the first protective layer 210. The strain gauge assembly 100 is connected to the light-transmitting plastic film. On the one hand, after the pre-positioning layer 211 pre-positions the strain gauge assembly 100 on the surface of the test piece, the position of the strain gauge assembly 100 relative to the test piece can be visually observed through the light-transmitting plastic film, so as to determine whether there is a deviation between the strain gauge assembly 100 and the test piece, making the position observation of the strain gauge assembly 100 more intuitive and accurate; on the other hand, external light can be irradiated on the fixing portion 111 through the light-transmitting plastic film, so that the fixing portion 111 is cured to connect the strain gauge assembly 100 to the test piece.

[0078] Alternatively, if Figure 4 As shown, the protection assembly 200 further includes a third protection layer 230, the first protection layer 210 is provided with a second surface, the second surface is arranged parallel to the first surface and spaced apart, and the third protection layer 230 is arranged on the second surface. In other words, the third protection layer 230 is arranged on one side of the first protection layer 210 and away from the strain gauge assembly 100, and the third protection layer 230 cooperates with the first protection layer 210 to play a double role in protecting the strain gauge assembly 100, ensuring that external sharp objects will not fall on the strain gauge assembly 100 to damage the strain gauge assembly 100, and external foreign objects will not fall on the strain gauge assembly 100 to pollute the strain gauge assembly 100, thereby extending the service life of the strain gauge assembly 100.

[0079] In the description of the present invention, features defined as “first”, “second”, and “third” may explicitly or implicitly include one or more such features, and are used to distinguish and describe the features, without any distinction of order or importance.

[0080] Optionally, the third protective layer 230 is an opaque layer. Since the first protective layer 210 is a translucent layer, the first protective layer 210 cannot block external light. Therefore, the third protective layer 230 is an opaque layer in the present application. The third protective layer 230 protects the strain gauge assembly 100 while ensuring that external light does not irradiate the fixing portion 111 of the strain gauge assembly 100 and cause the fixing portion 111 to solidify prematurely.

[0081] Optionally, the opaque layer of the third protective layer 230 may also be made of one of opaque film, opaque glass or opaque tin foil, as long as it is ensured that external light does not irradiate the fixing portion 111 of the strain gauge assembly 100 and cause the fixing portion 111 to solidify prematurely.

[0082] It can be seen that the strain gauge assembly 100 of the present application is provided with opaque layers (the second protective layer 220 and the third protective layer 230) on opposite sides. During the movement of the strain detection module 1000, the second protective layer 220 and the third protective layer 230 cooperate to ensure that external light does not irradiate the fixed portion 111 of the strain gauge assembly 100. When the second protective layer 220 is removed from the pre-positioning layer 211, the strain gauge assembly 100 will be pre-positioned on the surface of the test piece. At this time, the test piece and the third protective layer 230 cooperate to shield external light and ensure that external light does not irradiate the fixed portion 111 of the strain gauge assembly 100. Therefore, during the pre-positioning process, the strain gauge assembly 100 of the present application is only pre-positioned on the test piece through the pre-positioning layer 211, ensuring that the strain gauge assembly 100 can be repeatedly bonded and adjusted relative to the test piece, and the fixed portion 111 does not play its own role.

[0083] Optionally, the third protective layer 230 is removably connected to the second surface of the first protective layer 210. When the strain gauge assembly 100 is pre-positioned and needs to be connected to the test piece through the fixing portion 111, the third protective layer 230 is removed from the first protective layer 210 to expose the light-transmitting first protective layer 210. At this time, the fixing portion 111 is irradiated with the aid of an external light source, and the fixing portion 111 is cured and connects the strain gauge assembly 100 to the test piece.

[0084] In some embodiments of the present invention, the free ends 223 of the first peeling layer 221 and the second peeling layer 222 can swing relative to the first protective layer 210. Since the second protective layer 220 is a thin film, the thin film can move after being subjected to an external force, so that the two free ends 223 can swing, and the swinging is mainly for adjusting the extension direction of the two free ends 223. When the free end 223 of the first peeling layer 221 and the free end 223 of the second peeling layer 222 swing toward the direction close to the first protective layer 210, the two free ends 223 overlap each other and cover the strain gauge assembly 100 to shield external light and protect the strain gauge assembly 100; when the free end 223 of the first peeling layer 221 and the free end 223 of the second peeling layer 222 swing toward the direction away from the first protective layer 210, as shown in FIG. Figure 3 As shown, an assembly channel 240 is formed between the first peeling layer 221 and the second peeling layer 222, and the strain gauge assembly 100 can be connected to the first protective layer 210 through the assembly channel 240. The assembly channel 240 mainly serves to avoid the strain gauge assembly 100, ensuring that the strain gauge assembly 100 can be connected to the first protective layer 210 through the second protective layer 220 and is located between the first protective layer 210 and the second protective layer 220.

[0085] In some embodiments of the present invention, Figure 5 As shown, the strain gauge assembly 100 includes a resistive strain gauge 110, a terminal 120 and a wire 130. The resistive strain gauge 110 is used to detect the strain value of the test piece, and a fixing portion 111 is provided on the resistive strain gauge 110. The resistive strain gauge 110 has the advantages of light weight, sensitive detection, high detection accuracy, and wide detection range. The detection accuracy can be improved by using the resistive strain gauge 110 to detect the strain value of the test piece. The resistive strain gauge 110 is provided with a fixing portion 111. After the resistive strain gauge 110 is positioned through the pre-positioning layer 211, the resistive strain gauge 110 can be connected to the test piece through the fixing portion 111. While improving the connection efficiency of the resistive strain gauge 110, the position of the resistive strain gauge 110 relative to the test piece can be ensured to be stable, further improving the detection accuracy of the resistive strain gauge 110.

[0086] Optionally, the fixing portion 111 is a light-curing adhesive layer, which is cured after being irradiated with light and connected to the test piece.

[0087] Optionally, the resistive strain gauge 110 is a transparent member. Since a photocuring adhesive layer is provided on the side of the resistive strain gauge 110 away from the first protective layer 210, the transparent member ensures that external light can penetrate the resistive strain gauge 110 and irradiate the fixing portion 111, so that the fixing portion 111 is cured to connect the resistive strain gauge 110 to the test piece.

[0088] Optionally, the fixing portion 111 is disposed on the resistive strain gauge 110 and is disposed away from the first protective layer 210. It is ensured that after the strain gauge assembly 100 is pre-positioned on the surface of the test piece through the pre-positioning layer 211, the fixing portion 111 can be located between the resistive strain gauge 110 and the test piece, and when the fixing portion 111 is irradiated with external light, the fixing portion 111 is cured to connect the resistive strain gauge 110 to the test piece.

[0089] Alternatively, if Figure 5 As shown, the output end 112 of the resistance strain gauge 110 is welded on the terminal 120. That is, the output end 112 is led out from one end of the resistance strain gauge 110, and the electrical connection between the resistance strain gauge 110 and the wire 130 can be realized through the output end 112, so that the strain value detected by the resistance strain gauge 110 can be output to the data acquisition system, so as to determine whether the test piece has mechanical deformation.

[0090] Alternatively, if Figure 5 As shown, one end of the wire 130 is connected to the terminal block 120, and the other end of the wire 130 extends out of the protection assembly 200 and is connected to the data acquisition system. Since the output end 112 of the resistance strain gauge 110 and the wire 130 are both connected to the terminal block 120, the terminal block 120 can realize the electrical connection between the resistance strain gauge 110 and the wire 130, thereby ensuring that the strain value detected by the resistance strain gauge 110 can be transmitted to the data acquisition system, so as to intuitively determine whether the test piece has mechanical deformation.

[0091] Alternatively, if Figure 5 As shown, the terminal block 120 includes a fixing plate 121 and a plurality of connecting pieces 122. The plurality of connecting pieces 122 are arranged on the fixing plate 121. One end of the connecting piece 122 is connected to the output end 112 of the resistance strain gauge 110, and the other end of the connecting piece 122 is connected to the wire 130. The fixing plate 121 is used to support the connecting piece 122 to ensure that the positions of the plurality of connecting pieces 122 are stable. When the output end 112 of the resistance strain gauge 110 and the wire 130 are connected to the connecting piece 122 at the same time, the electrical connection between the output end 112 of the resistance strain gauge 110 and the wire 130 can be achieved.

[0092] Optionally, the connecting piece 122 is a conductive piece. Since the output end 112 of the resistive strain gauge 110 and the wire 130 are both connected to the connecting piece 122, and the output end 112 of the resistive strain gauge 110 and the wire 130 need to be electrically connected, the present application sets the connecting piece 122 as a conductive piece to achieve conduction between the output end 112 of the resistive strain gauge 110 and the wire 130, so as to facilitate the transmission of the strain value detected by the resistive strain gauge 110 to the data acquisition system.

[0093] It should be noted that, by providing a conductive connecting piece 122, during the assembly of the strain gauge assembly 100, the output end 112 of the resistive strain gauge 110 can be connected to one end of the connecting piece 122, and the wire 130 can be connected to the other end of the connecting piece 122, that is, the output end 112 of the resistive strain gauge 110 and the wire 130 will not be directly welded together. At this time, the connecting piece 122 can play a role in stabilizing the current, and because the end of the wire 130 away from the resistive strain gauge 110 is connected to the data acquisition system, the above-mentioned setting can also ensure that when the data acquisition system shakes, it will not cause the resistive strain gauge 110 to shake, thereby further improving the position stability of the resistive strain gauge 110, ensuring that the resistive strain gauge 110 can stably detect the strain value of the test piece, and improving the accuracy of the detection.

[0094] Optionally, the output terminal 112 and the wire 130 are both soldered to the connecting piece 122 by hot-melt tin to improve the welding strength and ensure that the output terminal 112 and the wire 130 are stably positioned relative to the connecting piece 122 .

[0095] Optionally, the fixing plate 121 is a transparent insulating plate, and a fixing portion 111 is provided on one side of the fixing plate 121 away from the connecting piece 122, and the fixing portion 111 is a light-curing adhesive layer. On one hand, since the fixing plate 121 is connected with the conductive connecting piece 122, the transparent insulating plate can ensure that the current on the connecting piece 122 will not be transmitted to the fixing plate 121, thereby improving the safety of the strain gauge assembly 100; on the other hand, since the fixing plate 121 is provided with a light-curing adhesive layer, the transparent insulating plate ensures that external light can be irradiated on the fixing portion 111 through the fixing plate 121, so that the fixing portion 111 is cured to connect the strain gauge assembly 100 to the test piece.

[0096] The following describes an assembly method of the strain detection module 1000 according to an embodiment of the present invention with reference to the accompanying drawings.

[0097] According to an embodiment of the present invention, a method for assembling a strain detection module 1000 is as follows: Figure 6 As shown, the following steps are included:

[0098] S11, welding the resistance strain gauge 110 and the wire 130 to the connecting piece 122 respectively. It should be noted that here, the output end 112 of the resistance strain gauge 110 and the wire 130 are mainly welded to the connecting piece 122 respectively.

[0099] S12, a fixing portion 111 is added to a side of the fixing plate 121 away from the connecting plate 122, and a fixing portion 111 is added to a side of the resistance strain gauge 110 to form a strain gauge assembly 100.

[0100] S13 , removably connecting the first peeling layer 221 and the second peeling layer 222 of the second protective layer 220 to the first surface of the first protective layer 210 , respectively, and forming an assembly channel 240 between the first peeling layer 221 and the second peeling layer 222 .

[0101] S14 , removably connecting the third protection layer 230 to the second surface of the first protection layer 210 .

[0102] S15 , connecting the strain gauge assembly 100 to the first protective layer 210 through the assembly channel 240 .

[0103] It can be seen from the above method that the assembly method of the strain detection module 1000 of the embodiment of the present invention is to first weld the output end 112 of the resistive strain gauge 110 and the wire 130 to the connecting plate 122 respectively to realize the electrical connection between the resistive strain gauge 110 and the wire 130, and then set a fixing portion 111 on one side of the fixing plate 121 and the resistive strain gauge 110 to form a strain gauge assembly 100. The strain gauge assembly 100 is used to detect the strain value of the test piece. The fixing portion 111 is mainly used to connect the strain detection module 1000 to the test piece, improve the position stability of the strain detection module 1000, reduce the connection steps of the strain detection module 1000, and improve the connection efficiency. An assembly channel 240 is formed between the first peeling layer 221 and the second peeling layer 222. The assembled strain gauge assembly 100 can be connected to the first protective layer 210 through the assembly channel 240. The first protective layer 210 can limit the position of the strain gauge assembly 100 while protecting the strain gauge assembly 100, thereby extending the life of the strain gauge assembly 100 and stabilizing the position of the strain gauge assembly 100 relative to the protective assembly 200. A third protective layer 230 that can be removed relative to the second surface of the first protective layer 210 is provided. The third protective layer 230 can protect the strain gauge assembly 100 and ensure that external light will not irradiate the fixing portion 111 of the strain gauge assembly 100 to cause the fixing portion 111 to cure in advance. The third protective layer 230 can also be removed after the position of the strain gauge assembly 100 is determined to expose the first protective layer 210. At this time, external light can irradiate the fixing portion 111 through the first protective layer 210, thereby curing the fixing portion 111 to connect the strain gauge assembly 100 to the test piece.

[0104] Optionally, the assembly method of the strain detection module 1000 further includes the following steps: a pre-positioning layer 211 is provided between the first peeling layer 221 and the first surface of the first protective layer 210, and a pre-positioning layer 211 is provided between the second peeling layer 222 and the first surface of the first protective layer 210, and the first peeling layer 221 and the second peeling layer 222 are respectively removably connected to the pre-positioning layer 211. When the first peeling layer 221 and the second peeling layer 222 are removed from the pre-positioning layer 211, the pre-positioning layer 211 is exposed, which facilitates the subsequent adjustment of the strain gauge assembly 100.

[0105] The following describes the method of using the strain detection module 1000 according to the embodiment of the present invention with reference to the accompanying drawings.

[0106] A method for using a strain detection module 1000 according to an embodiment of the present invention is as follows: Figure 7 As shown, the following steps are included:

[0107] S21. Clean the surface of the test piece.

[0108] S22, removing the first peeling layer 221 and the second peeling layer 222 from the first protective layer 210, making the pre-positioning layer 211 on the first protective layer 210 face the test piece, and making the fixing portion 111 of the strain gauge assembly 100 face the test piece.

[0109] S23 , contact the pre-positioning layer 211 with the test piece and adjust the position of the strain detection module 1000 to connect the pre-positioning layer 211 with the test piece.

[0110] S24, tearing off the third protective layer 230 from the first protective layer 210 to expose the first protective layer 210.

[0111] S25 , irradiating the strain detection module 1000 with ultraviolet light to ensure that the fixing portion 111 is solidified and connected to the test piece.

[0112] S26. The strain gauge assembly 100 detects the strain value of the test piece.

[0113] It can be seen from the above method that the method for using the strain detection module 1000 of the embodiment of the present invention is to first clean the surface of the test piece to be tested to ensure that when the strain detection module 1000 is bonded to the test piece, there is no foreign matter on the surface of the test piece to be tested, thereby improving the bonding quality between the strain detection module 1000 and the test piece, and then remove the first peeling layer 221 and the second peeling layer 222 from the first protective layer 210 to expose the pre-positioning layer 211. At this time, the strain detection module 1000 can be pre-positioned on the test piece through the pre-positioning layer 211, and the strain detection module 1000 can be adjusted relative to the pre-positioning layer 211 at any time. The position of the test piece. After the position adjustment of the strain detection module 1000 is completed, since the fixing portion 111 of the strain gauge assembly 100 is also facing the test piece, the strain detection module 100 can be irradiated with external ultraviolet light to cure the fixing portion 111 and connect the strain gauge assembly 100 to the surface of the test piece. This connection process can reduce the connection steps between the strain detection module 1000 and the test piece, improve the connection efficiency, and after the fixing portion 111 is cured, it can also ensure that the position of the strain gauge assembly 100 relative to the test piece is stable, so that the strain value of the test piece is detected by the strain gauge assembly 100.

[0114] The following describes the strain detection module 1000, the assembly method and the use method of the strain detection module 1000 in the specific embodiments of the present invention in conjunction with the drawings of the specification. The embodiments of the present invention can be all embodiments after combining the above-mentioned multiple technical solutions, but are not limited to the following specific embodiments, which all fall within the protection scope of the present invention.

[0115] Example 1

[0116] A strain detection module 1000, such as Figure 1 and Figure 2 As shown, it includes: a strain gauge assembly 100 and a protection assembly 200.

[0117] The strain gauge assembly 100 is used to detect the strain value of the test piece, such as Figure 5 As shown, the strain gauge assembly 100 includes a resistive strain gauge 110, a terminal 120 and a wire 130. The resistive strain gauge 110 is used to detect the strain value of the test piece. The output end 112 of the resistive strain gauge 110 and the wire 130 are welded on the terminal 120. The other end of the wire 130 extends out of the protection component 200 and is connected to the data acquisition system. A fixing portion 111 is provided on one side of the resistive strain gauge 110 and the terminal 120. The fixing portion 111 is a photocurable adhesive layer. The photocurable adhesive layer is cured after being irradiated with light and connected to the test piece.

[0118] Combination Figure 1 and Figure 3 As shown, the protection component 200 includes a first protection layer 210, a second protection layer 220 and a third protection layer 230. The first protection layer 210 is a light-transmitting layer, and the second protection layer 220 and the third protection layer 230 are opaque layers.

[0119] like Figure 3 As shown, the first surface of the first protective layer 210 is connected to the strain gauge assembly 100, and a pre-positioning layer 211 is also provided on the first surface of the first protective layer 210. The pre-positioning layer 211 includes an adsorbable surface composed of multiple vacuum suction cups, and the pre-positioning layer 211 can be pre-positioned on the surface of the test piece.

[0120] The second protection layer 220 is removably connected to the pre-positioning layer 211. Figure 3 As shown, the second protective layer 220 includes a first peeling layer 221 and a second peeling layer 222, one end of the first peeling layer 221 and one end of the second peeling layer 222 are both arranged on the pre-positioning layer 211 close to the strain gauge assembly 100, and the first peeling layer 221 and the second peeling layer 222 both have free ends 223 extending toward each other, and the two free ends 223 overlap each other and cover the strain gauge assembly 100.

[0121] The first protective layer 210 has a second surface, and the second surface is arranged parallel to the first surface and spaced apart from each other. The third protective layer 230 is arranged on the second surface.

[0122] Example 2

[0123] A strain detection module 1000, such as Figure 1 and Figure 2 As shown, it includes: a strain gauge assembly 100 and a protection assembly 200.

[0124] The strain gauge assembly 100 is used to detect the strain value of the test piece, such as Figure 5 As shown, the strain gauge assembly 100 includes a resistive strain gauge 110, a terminal 120 and a wire 130. The resistive strain gauge 110 is used to detect the strain value of the test piece. The output end 112 of the resistive strain gauge 110 and the wire 130 are welded to the terminal 120. The other end of the wire 130 extends out of the protection assembly 200 and is connected to the data acquisition system.

[0125] The terminal block 120 includes a fixing plate 121 and two connecting pieces 122. The two connecting pieces 122 are arranged on the fixing plate 121. One end of the connecting piece 122 is connected to the output end 112 of the resistance strain gauge 110, and the other end of the connecting piece 122 is connected to the wire 130. A fixing portion 111 is provided on one side of the resistance strain gauge 110 and the fixing plate 121. The fixing portion 111 is a light-curing adhesive layer. The light-curing adhesive layer is cured after being irradiated with light and connected to the test piece.

[0126] Combination Figure 1 and Figure 3 As shown, the protection component 200 includes a first protection layer 210, a second protection layer 220 and a third protection layer 230. The first protection layer 210 is a light-transmitting layer, and the second protection layer 220 and the third protection layer 230 are opaque layers.

[0127] like Figure 3 As shown, the first surface of the first protective layer 210 is connected to the strain gauge assembly 100, and a pre-positioning layer 211 is also provided on the first surface of the first protective layer 210. The pre-positioning layer 211 includes a pressure-sensitive adhesive layer 2111, and the pressure-sensitive adhesive layer 2111 can be repeatedly bonded to adjust the pre-positioning position on the surface of the test piece.

[0128] The second protection layer 220 is removably connected to the pre-positioning layer 211. Figure 3As shown, the second protective layer 220 includes a first peeling layer 221 and a second peeling layer 222. One end of the first peeling layer 221 and one end of the second peeling layer 222 are both arranged on the pre-positioning layer 211 close to the strain gauge assembly 100. The first peeling layer 221 and the second peeling layer 222 both have free ends 223 extending toward each other. The two free ends 223 overlap with each other and cover the strain gauge assembly 100. An assembly channel 240 is formed between the first peeling layer 221 and the second peeling layer 222.

[0129] The first protective layer 210 has a second surface, and the second surface is arranged parallel to the first surface and spaced apart from each other. The third protective layer 230 is arranged on the second surface.

[0130] Example 3

[0131] A method for assembling a strain detection module 1000, comprising the strain detection module 1000 in embodiment 2, such as Figure 6 As shown, the following steps are included:

[0132] S11 , welding the resistance strain gauge 110 and the wire 130 to the connecting piece 122 respectively.

[0133] S12, a fixing portion 111 is added to a side of the fixing plate 121 away from the connecting plate 122, and a fixing portion 111 is added to a side of the resistance strain gauge 110 to form a strain gauge assembly 100.

[0134] S13 , removably connecting the first peeling layer 221 and the second peeling layer 222 of the second protective layer 220 to the first surface of the first protective layer 210 , respectively, and forming an assembly channel 240 between the first peeling layer 221 and the second peeling layer 222 .

[0135] S14 , removably connecting the third protection layer 230 to the second surface of the first protection layer 210 .

[0136] S15 , connecting the strain gauge assembly 100 to the first protective layer 210 through the assembly channel 240 .

[0137] Example 4

[0138] A method for using a strain detection module 1000, comprising the strain detection module 1000 in embodiment 2, such as Figure 7 As shown, the following steps are included:

[0139] S21. Clean the surface of the test piece.

[0140] S22, removing the first peeling layer 221 and the second peeling layer 222 from the first protective layer 210, making the pre-positioning layer 211 on the first protective layer 210 face the test piece, and making the fixing portion 111 of the strain gauge assembly 100 face the test piece.

[0141] S23 , contact the pre-positioning layer 211 with the test piece and adjust the position of the strain detection module 1000 to connect the pre-positioning layer 211 with the test piece.

[0142] S24, tearing off the third protective layer 230 from the first protective layer 210 to expose the first protective layer 210.

[0143] S25 , irradiating the strain detection module 1000 with ultraviolet light to ensure that the fixing portion 111 is solidified and connected to the test piece.

[0144] S26. The strain gauge assembly 100 detects the strain value of the test piece.

[0145] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0146] The strain detection module 1000, the assembly method of the strain detection module 1000 and other components of the use method according to the embodiment of the present invention, such as the detection principle of the resistive strain gauge 110, are well known to ordinary technicians in the field and will not be described in detail here.

[0147] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0148] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A strain detection module, characterized in that: include: A strain gauge assembly, the strain gauge assembly is used to detect the strain value of the test piece, and the strain gauge assembly includes a fixing portion connected to the test piece; Protection components, including: A first protective layer, wherein a first surface of the first protective layer is connected to the strain gauge assembly, and a pre-positioning layer is further provided on the first surface of the first protective layer, and the pre-positioning layer can be pre-positioned on the surface of the test piece; a second protective layer, the second protective layer being removably connected to the pre-positioning layer; the second protective layer comprising a first peeling layer and a second peeling layer, one end of the first peeling layer and one end of the second peeling layer being both arranged on the pre-positioning layer close to the strain gauge assembly, the first peeling layer and the second peeling layer both having free ends extending toward each other, the two free ends overlapping each other and covering the strain gauge assembly; The pre-positioning layer comprises a pressure-sensitive adhesive layer, and after the first peeling layer and the second peeling layer are removed from the pre-positioning layer, the pressure-sensitive adhesive layer can be repeatedly bonded and adjusted to a pre-positioning position on the surface of the test piece; The fixing part is a light-curing adhesive layer, which is cured after being irradiated with light and connected to the test piece; the second protective layer is a light-proof layer, and the first protective layer is a light-transmitting layer.

2. The strain detection module according to claim 1, characterized in that: The protection component also includes a third protection layer. The first protection layer is provided with a second surface. The second surface is arranged parallel to and spaced from the first surface. The third protection layer is arranged on the second surface. The third protection layer is an opaque layer.

3. The strain detection module according to claim 2, characterized in that: The light-proof layer is a light-proof film.

4. The strain detection module according to claim 1, characterized in that: The free ends of the first peeling layer and the second peeling layer can swing relative to the first protective layer, and an assembly channel is formed between the first peeling layer and the second peeling layer. The strain gauge assembly can be connected to the first protective layer through the assembly channel.

5. The strain detection module according to claim 1, characterized in that: The strain gauge assembly comprises: A resistance strain gauge, the resistance strain gauge is used to detect the strain value of the test piece, and the fixing part is provided on the resistance strain gauge; A wiring terminal, to which the output end of the resistive strain gauge is welded; A wire, one end of which is connected to the wiring terminal, and the other end of which extends out of the protection component and is connected to a data acquisition system.

6. The strain detection module according to claim 5, characterized in that: The wiring terminal comprises a fixing plate and a plurality of connecting plates, wherein the plurality of connecting plates are arranged on the fixing plate, one end of the connecting plate is connected to the output end of the resistive strain gauge, and the other end of the connecting plate is connected to the wire.

7. The strain detection module according to claim 6, characterized in that: The connecting sheet is a conductive sheet, the fixing plate is a transparent insulating plate, the fixing portion is provided on a side of the fixing plate away from the connecting sheet, and the fixing portion is a photocurable adhesive layer.

8. An assembly method of a strain detection module according to any one of claims 1 to 7, characterized in that: The following steps are involved: Weld the resistance strain gauge and the wire to the connecting piece respectively; A fixing portion is added on one side of the fixing plate away from the connecting piece, and a fixing portion is added on one side of the resistance strain gauge to form a strain gauge assembly; Removably connecting a first peeling layer and a second peeling layer of the second protective layer to a first surface of the first protective layer, respectively, to form an assembly channel between the first peeling layer and the second peeling layer; removably connecting a third protective layer to the second surface of the first protective layer; The strain gauge assembly is connected to the first protective layer through the assembly channel.

9. A method for using the strain detection module according to any one of claims 1 to 7, characterized in that: The following steps are involved: Clean the surface of the test piece; The first peeling layer and the second peeling layer are removed from the first protective layer, so that the pre-positioning layer on the first protective layer faces the test object, and the fixing part of the strain gauge assembly faces the test object; The pre-positioning layer is brought into contact with the test piece and the position of the strain detection module is adjusted to connect the pre-positioning layer to the test piece; tearing off the third protective layer from the first protective layer to expose the first protective layer; Using ultraviolet light to irradiate the strain detection module to ensure that the fixing portion is solidified and connected to the test piece; The strain gauge assembly detects the strain value of the test piece.

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