Detection device

Abstract

The utility model discloses a detection device and relates to the technical field of material testing. The detection device comprises a fixed base, a positioning support and a detection assembly, the fixed base is provided with a positioning structure and a detection hole, the detection hole is internally provided with a detection sleeve, and the detection sleeve is filled with colloid to be detected; the positioning bracket is arranged on the fixed base and is positioned by the positioning structure, and the positioning bracket is provided with a first positioning hole which is coaxial with the detection hole; the detection assembly comprises a detection fiber bragg grating, and the detection fiber bragg grating is arranged in the first positioning hole and the detection sleeve in a penetrating mode. The detection device can improve the position precision of the fiber bragg grating, so that the accuracy of the detection result of the curing shrinkage rate of the thermosetting adhesive is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to material testing technical field especially relates to a detection device. BACKGROUND

[0002] The thermosetting adhesive usually contains small molecule polymer monomer and curing agent, when the two are mixed together and at a certain temperature, the polymer monomer and curing agent generate crosslinked solid product with chemical reaction, and are combined together with the adherend, thereby realizing bonding. In the process that the polymer monomer and curing agent generate crosslinking reaction, the distance between molecules shortens, therefore the volume of thermosetting adhesive can reduce along with the chemical reaction, and this process is called curing shrinkage, and the relative change size of volume is curing shrinkage rate.

[0003] In material science and industrial production, curing shrinkage rate is a key parameter, and the curing shrinkage rate of thermosetting adhesive directly influences the quality and performance of product. In the prior art, the curing shrinkage rate of thermosetting adhesive is usually detected through the fiber grating technology. In the detection process, the position accuracy of fiber grating needs to be ensured, otherwise the accuracy of detection structure will be influenced. UTILITARY MODEL CONTENT

[0004] The utility model aims at providing a detection device, which can improve the position accuracy of fiber grating, thereby improving the accuracy of detection result of the curing shrinkage rate of thermosetting adhesive.

[0005] To achieve the purpose, the utility model adopts the following technical scheme:

[0006] A detection device comprises:

[0007] A fixed base is provided with a positioning structure and a detection hole, a detection sleeve is arranged in the detection hole, and the detection sleeve is filled with a gel to be detected;

[0008] A positioning support is arranged on the fixed base and positioned by the positioning structure, and the positioning support is provided with a first positioning hole coaxially arranged with the detection hole;

[0009] A detection assembly comprises a detection fiber grating, and the detection fiber grating is arranged in the first positioning hole and the detection sleeve.

[0010] As an optional solution of the above detection device, the fixed base comprises two fixed blocks, the two fixed blocks are provided with detection grooves, and the two fixed blocks can abut against each other to form the detection hole by the detection grooves of the two fixed blocks.

[0011] As an optional solution of the above detection device, the detection device further comprises a base, the base is provided with a fixing groove, and the two fixing blocks are arranged in the fixing groove to fix the two fixing blocks.

[0012] As an optional solution of the above detection device, the fixing base is further provided with a calibration hole, and the calibration hole is provided with a calibration fiber grating.

[0013] As an optional solution of the above detection device, the positioning structure comprises a positioning groove, the positioning support comprises a fixing part and a positioning part, the fixing part is arranged in the positioning groove and positioned and abutted by the positioning groove, and the positioning part is fixedly connected with the fixing part and located above the positioning groove.

[0014] As an optional solution of the above detection device, the side wall of the fixing base is provided with a heating assembly, and the heating assembly is configured to heat the fixing base.

[0015] As an optional solution of the above detection device, the side wall of the fixing base is provided with a containing groove, and the heating assembly comprises a heating sheet arranged in the containing groove.

[0016] As an optional solution of the above detection device, the detection device further comprises a temperature measuring part, the fixing base is provided with a temperature measuring hole, the temperature measuring hole is located between the heating assembly and the detection hole, and the temperature measuring part is arranged in the temperature measuring hole.

[0017] As an optional solution of the above detection device, the detection sleeve is provided with a blocking part at an end away from the positioning support, the blocking part is provided with a third positioning hole, and the detection fiber grating is arranged in the third positioning hole and positioned by the third positioning hole.

[0018] As an optional solution of the above detection device, the fixing base is provided with a plurality of detection holes at intervals, and the positioning support is provided with a plurality of first positioning holes corresponding to the plurality of detection holes one by one and arranged coaxially.

[0019] The detection device has the advantages that:

[0020] The utility model provides a kind of detection device. In the detection device, fixing base is positioned to positioning support by positioning structure, to guarantee that the first positioning hole of positioning support and the detection hole of fixing base are coaxially arranged, that is, make detection fiber grating can be located in the middle position of detection sleeve, guarantee detection precision. The setting of detection sleeve can guarantee the smoothness of inner wall, to reduce even eliminate the generation of gas bubble in colloid, to avoid bubble influence detection result.

[0021] The detection device can improve the position precision of the fiber grating, thereby improving the accuracy of the detection result of the curing shrinkage rate of the thermosetting adhesive. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the detection device provided by the utility model;

[0023] Figure 2 is a structural schematic view of the detection device provided by the utility model without the positioning support;

[0024] Figure 3 is a structural schematic view of the fixing block provided by the utility model;

[0025] Figure 4 is a structural schematic view of the base provided by the utility model;

[0026] Figure 5 is a structural schematic view of the positioning block provided by the utility model.

[0027] In the drawings:

[0028] 1, fixed base; 11, positioning groove; 12, detection hole; 13, calibration hole; 14, fixing block; 141, detection groove; 142, calibration groove; 15, containing groove; 16, temperature measurement hole;

[0029] 2, positioning support; 21, first positioning hole; 22, second positioning hole; 23, fixed part; 24, positioning part; 25, positioning block; 251, first positioning groove; 252, second positioning groove;

[0030] 3, base; 31, fixed groove. DETAILED DESCRIPTION

[0031] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as limiting the utility model.

[0032] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0033] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] Unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] The technical scheme of the utility model will be further illustrated below by combining the drawings and through specific embodiments.

[0036] In material science and industrial production, the curing shrinkage is a key parameter, and the curing shrinkage of thermosetting adhesive directly affects the quality and performance of products. In the prior art, the commonly used method for detecting the curing shrinkage of thermosetting adhesive is the optical fiber grating sensor method. When the adhesive is cured at a specified curing temperature, the optical fiber grating is bonded with the adhesive and deforms together with the further shrinkage of the adhesive, so as to change the wavelength of the reflected light spectrum analyzer, and the effective curing shrinkage can be calculated according to the theoretical formula of the spectrum wavelength shift and strain.

[0037] During the detection process, the position accuracy of the fiber grating needs to be ensured, and the fiber grating is prevented from being too close to the side wall of the mold to prevent the deformation of the fiber grating from being affected by the edge effect of the side wall and affecting the accuracy of the detection structure.

[0038] To solve the above problems, the embodiment provides a detection device, as shown in Figure 1 and Figure 2 , which comprises a fixed base 1, a positioning support 2 and a detection assembly. The fixed base 1 is provided with a positioning structure and a detection hole 12, a detection sleeve is arranged in the detection hole 12, and the detection sleeve is filled with a colloid to be detected. The positioning support 2 is arranged on the fixed base 1 and positioned by the positioning structure. The positioning support 2 is provided with a first positioning hole 21 coaxially arranged with the detection hole 12. The detection assembly comprises a detection fiber grating, which is arranged in the first positioning hole 21 and the detection sleeve.

[0039] In the detection device, the fixed base 1 positions the positioning support 2 through the positioning structure, so that the first positioning hole 21 of the positioning support 2 is coaxially arranged with the detection hole 12 of the fixed base 1, that is, the detection fiber grating can be located at the middle position of the detection sleeve, so as to ensure the detection accuracy. The arrangement of the detection sleeve can ensure the smoothness of the inner wall, so as to reduce or even eliminate the generation of bubbles in the colloid, so as to avoid the influence of bubbles on the detection result.

[0040] The detection device can improve the position accuracy of the fiber grating, thereby improving the accuracy of the detection result of the shrinkage rate of the thermosetting adhesive.

[0041] In the embodiment, the detection steps of the thermal shrinkage rate of the thermosetting adhesive by using the detection device are as follows:

[0042] S1, set the oven temperature to 160-180℃ and keep it for 10-15 minutes to effectively remove the environmental humidity and water vapor.

[0043] S2, then adjust the oven temperature to 100-110℃, use a pipette to inject glue along the inner wall of the silica gel tube, and operate closely to the silica gel tube wall to prevent the formation of bubbles.

[0044] S3, after completing the glue injection, the detection fiber grating is inserted from the bottom to the top, and the sensor part is ensured to be immersed in the glue. The first positioning hole 21 of the positioning support 2 fixes the detection fiber grating, so as to ensure that the detection fiber grating is in a straight line state in the glue.

[0045] S4, set the glue curing temperature to ensure that the temperature settings of the oven and the temperature control table are consistent to maintain the consistency of the experimental conditions.

[0046] S5, at the beginning of the curing process, the software is started to record the wavelength change of the fiber grating and the stress and strain data during the curing process of the glue. After the recording is completed, the stress and strain change data is collected, and the curing shrinkage is calculated according to the wavelength change, and the test is ended.

[0047] The calculation process of the thermal shrinkage of the thermosetting adhesive is as follows:

[0048]

[0049] is the wavelength shift of the fiber grating from the gel point to the end of curing; F(E S ,β) is a nonlinear function; Δε ch is the curing shrinkage. E S is the modulus, and β is b / a.

[0050]

[0051] F(E S ,β) is a nonlinear function, wherein the parameter function is G1(β); G2(β); H0(β); H0(β); H2(β); λ B is the initial wavelength; E f is the elastic modulus of the fiber.

[0052]

[0053] H0(β)=(1+v s )(β 2 +1-2v s )#(5)

[0054] H1(β)=(β 2 -1)(v s β 2 +β 2 +2-4v f v s -v s -v f )#(6)

[0055]

[0056] In the parameter G1(β), P 11 , P 12 are constant parameters; n eff is the effective refractive index; v f , v s are Poisson's ratios.

[0057] Based on (1) (2) (3) (4) (5) (6) (7), the linear equation set (8) can be solved to obtain the curing shrinkage

[0058] It is worth mentioning that the positioning structure can include a protrusion provided on one of the fixed base 1 and the positioning support 2 and a recess provided on the other one of the fixed base 1 and the positioning support 2, the protrusion and the recess are inserted and matched to realize the positioning between the fixed base 1 and the positioning support 2. Alternatively, the positioning structure can also be a clamping block provided on one of the fixed base 1 and the positioning support 2 and a clamping hole provided on the other one of the fixed base 1 and the positioning support 2, the clamping block and the clamping hole are clamped, which not only can realize the positioning between the fixed base 1 and the positioning support 2, but also can realize the function of fixing the fixed base 1 and the positioning support 2.

[0059] In the embodiment, the positioning structure includes a positioning groove 11 opened on the top surface of the fixed base 1, and the positioning support 2 is arranged in the positioning groove 11 and positioned and abuts against the inner wall of the positioning groove 11 to ensure the accuracy of the relative position between the fixed base 1 and the positioning support 2.

[0060] In the embodiment, the end of the detection sleeve away from the positioning support 2 is provided with a plugging member, the plugging member is provided with a third positioning hole, and the detection fiber grating is arranged in and positioned by the third positioning hole. The plugging member can not only avoid the leakage of the colloid out of the detection sleeve, but also can fix the detection fiber grating at the end away from the positioning support 2, thereby further improving the verticality of the detection fiber grating.

[0061] It can be understood that, during the detection process, the temperature of the detection fiber grating will also change, and thus a part of the deformation of the detection fiber grating is caused by the temperature change, resulting in an error in the final detection result. In order to eliminate the error caused by the temperature change, the fixed base 1 is also provided with a calibration hole 13, and a calibration fiber grating is arranged in the calibration hole 13.

[0062] The calibration hole 13 is not provided with the colloid, and thus the calibration hole 13 does not need to be provided with the sleeve, that is, the diameter of the calibration hole 13 is smaller than the diameter of the detection hole 12. The deformation of the calibration fiber grating in the calibration hole 13 is only caused by the temperature change, and thus by combining the data of the detection fiber grating and the calibration fiber grating, the error caused by the temperature change can be excluded in the calculation result, thereby improving the accuracy.

[0063] It is worth mentioning that the calibration fiber grating is completely the same as the detection fiber grating, and the different names are only for distinguishing and facilitating the description.

[0064] Similarly, in order to ensure the verticality of the calibration fiber grating, the positioning support 2 is provided with a second positioning hole 22 coaxially arranged with the calibration hole 13, the end of the calibration hole 13 away from the positioning support 2 is plugged by a plugging member, and the calibration fiber grating is arranged in the second positioning hole 22 and the plugging member plugging the calibration hole 13.

[0065] As shown in Figure 2 , the fixed base 1 is spaced apart and provided with a plurality of detection holes 12, and the positioning support 2 is provided with a plurality of first positioning holes 21 corresponding to the plurality of detection holes 12 and coaxially arranged. A detection fiber grating is arranged in each detection hole 12. By arranging a plurality of detection holes 12, the colloidal can be detected multiple times at the same time, and the average value can be calculated according to the results of multiple detections, thereby further improving the detection accuracy of the curing shrinkage rate of the thermosetting adhesive.

[0066] Similarly, the fixed base 1 is spaced apart and provided with a plurality of calibration holes 13, and the positioning support 2 is provided with a plurality of second positioning holes 22 corresponding to the plurality of calibration holes 13 and coaxially arranged. A calibration fiber grating is arranged in each calibration hole 13. By arranging a plurality of calibration holes 13, the influence of multiple temperatures on the calibration fiber grating can be detected at the same time, and the average value can be calculated according to the results of multiple detections, thereby ensuring that the error can be accurately eliminated.

[0067] As shown in Figures 1-3 , the fixed base 1 includes two fixed blocks 14, and each of the two fixed blocks 14 is provided with a detection groove 141. The two fixed blocks 14 can abut each other to form the detection hole 12 with the detection grooves 141 of the two fixed blocks 14. The fixed base 1 is designed as two fixed blocks 14 which can be disassembled, which facilitates the placement of the detection sleeve into the detection hole 12, improves the efficiency, reduces the operation difficulty, and facilitates the operator to directly observe whether the detection sleeve is twisted, thereby avoiding affecting the detection result.

[0068] Similarly, the two fixed blocks 14 are each provided with a calibration groove 142, and the calibration grooves 142 of the two fixed blocks 14 form the calibration hole 13.

[0069] In this embodiment, the detection grooves 141 and the calibration grooves 142 are alternately arranged on the same straight line.

[0070] Further, the detection device further comprises a base 3, and the base 3 can fix the two fixed blocks 14. By fixing the fixed blocks 14 with the base 3, the reliability of the detection result can be ensured, and the stability of the detection device can be improved as a support structure.

[0071] In this embodiment, the base 3 is provided with a fixed groove 31, and the two fixed blocks 14 are arranged in the fixed groove 31. The fixed groove 31 can fix the two fixed blocks 14 to avoid separation of the two fixed blocks 14, and the base 3 can also support the fixed base 1.

[0072] As shown in Figure 1As shown, the positioning support 2 comprises a fixing part 23 and a positioning part 24, the fixing part 23 is arranged in the positioning groove 11 and is positioned and abuts against the positioning groove 11, and the positioning part 24 is fixedly connected with the fixing part 23 and is located above the positioning groove 11. The positioning part 24 can provide positioning for the relative position between the positioning support 2 and the fixed base 1, ensure the coaxiality of the first positioning hole 21 and the detection hole 12, and the coaxiality of the second positioning hole 22 and the calibration hole 13, and the positioning part 24 is located above the positioning groove 11, so that the operator can directly see the detection fiber grating and the calibration fiber grating, and judge whether the detection fiber grating and the calibration fiber grating exist bending and deviation phenomenon.

[0073] As shown in Figure 1 and Figure 5 In order to facilitate the detection fiber grating to be arranged in the first positioning hole 21 and the calibration fiber grating to be arranged in the second positioning hole 22, the positioning support 2 is composed of two positioning blocks 25, and each positioning block 25 is provided with a first positioning groove 251 and a second positioning groove 252, and when the two positioning blocks 25 are buckled, the first positioning grooves 251 of the two positioning blocks 25 form the first positioning hole 21, and the second positioning grooves 252 of the two positioning blocks 25 form the second positioning block 25.

[0074] As shown in Figure 1 and Figure 2 In order to improve the heating rate of the detection device, the side wall of the fixed base 1 is provided with a heating assembly, and the heating assembly is configured to heat the fixed base 1. After the detection device is put into the oven, the temperature in the oven begins to rise, but the detection device is heated by the oven, and the detection device is heated slowly, and the heating assembly can make the detection device quickly heated to the target temperature, and the detection efficiency is improved.

[0075] Specifically, the side wall of the fixed base 1 is provided with a containing groove 15, and the heating assembly comprises a heating sheet, and the heating sheet is arranged in the containing groove 15. The containing groove 15 can not only provide positioning for the heating sheet and ensure that the heating position of the heating sheet is a preset position, so as to ensure that the heating rate of the fixed base 1 is the same as the preset value, but also provide installation space for the heating sheet, avoiding that the heating sheet protrudes from the outer surface of the fixed base 1.

[0076] Further, the detection device further comprises a temperature measuring member, the fixed base 1 is provided with a temperature measuring hole 16, the temperature measuring hole 16 is located between the heating assembly and the detection hole 12, and the temperature measuring member is arranged in the temperature measuring hole 16. The temperature measuring member can detect the temperature of the fixed base 1 in real time, and the detection point thereof is located between the heating assembly and the detection hole 12, so as to improve the accuracy of temperature detection.

[0077] The above merely describes preferred embodiments of the present application, and for those skilled in the art, according to the idea of the present application, changes can be made in the specific implementation manner and application range, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A detection device, characterized in that, The application relates to a detection device for a colloidal solution. The fixed base is provided with a positioning structure and a detection hole, and a detection sleeve is arranged in the detection hole, wherein the detection sleeve is filled with a colloidal solution to be detected. The positioning support is arranged on the fixed base and positioned by the positioning structure, and the positioning support is provided with a first positioning hole coaxially arranged with the detection hole. The detection assembly comprises a detection fiber grating arranged in the first positioning hole and the detection sleeve.

2. The detection device of claim 1, wherein, The fixed base comprises two fixed blocks, each provided with a detection groove, and the two fixed blocks can abut against each other to form the detection hole by the detection grooves.

3. The detection device of claim 2, wherein, The detection device further comprises a base provided with a fixed groove, and the two fixed blocks are arranged in the fixed groove to be fixed.

4. The detection device of claim 1, wherein, The fixed base is further provided with a calibration hole, and a calibration fiber grating is arranged in the calibration hole.

5. The detection device of claim 1, wherein, The positioning structure comprises a positioning groove, the positioning support comprises a fixed part and a positioning part, the fixed part is arranged in the positioning groove and positioned by the positioning groove, and the positioning part is fixedly connected with the fixed part and located above the positioning groove.

6. The detection device of claim 1, wherein, The side wall of the fixed base is provided with a heating assembly configured to heat the fixed base.

7. The detection device of claim 6, wherein, The side wall of the fixed base is provided with a containing groove, and the heating assembly comprises a heating sheet arranged in the containing groove.

8. The detection device of claim 6, wherein, The detection device further comprises a temperature measuring element, and the fixed base is provided with a temperature measuring hole between the heating assembly and the detection hole, and the temperature measuring element is arranged in the temperature measuring hole.

9. The detection device of claim 1, wherein, The detection sleeve is provided with a sealing element at one end away from the positioning support, the sealing element is provided with a third positioning hole, and the detection fiber grating is arranged in and positioned by the third positioning hole.

10. The detection device of claim 1, wherein, The fixed base is provided with a plurality of detection holes at intervals, and the positioning support is provided with a plurality of first positioning holes coaxially arranged with the plurality of detection holes.

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