Mounting structure and mounting method of stress sensor

Abstract

The invention relates to the technical field of sensors, and particularly discloses a mounting structure and a mounting method of a stress sensor, the mounting structure of the stress sensor is used for being arranged on the side wall of a rod-shaped driving structure, and the mounting structure comprises a stress sensor, a glue sealing seat, a signal line, a terminal connector and a packaging mechanism, the stress sensor is embedded in the bottom of the glue sealing seat, one end of the signal line penetrates into the glue sealing seat and is connected with the stress sensor, the other end of the signal line is connected with the terminal connector, and the bottom of the glue sealing seat faces the rod-shaped driving structure and is fixed to the side wall of the rod-shaped driving structure. And the packaging mechanism is arranged on the side wall of the rod-shaped driving structure and is used for forming the glue sealing seat and pressing and fixing the stress sensor on the side wall of the rod-shaped driving structure. According to the invention, the stress sensor can be conveniently installed in a rod-shaped driving structure, and the measurement accuracy can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of sensors, and in particular to an installation structure and an installation method of a stress sensor. Background Art

[0002] With the rapid development of modern science and technology, sensor technology, as a key tool for acquiring and converting physical quantities, plays an increasingly important role in various fields. Among them, stress sensors, as a device that can sense and measure stress changes in objects, have been widely used in many fields such as engineering monitoring, material testing, aerospace, and medical diagnosis.

[0003] The installation process of the stress sensor requires multiple steps such as patching, packaging, baking, UV curing, etc. The operation is cumbersome. In addition, the stress sensor is difficult to install in a slide-type electric rod or other rod-shaped drive structure. At the same time, it is greatly affected by external factors, and the perception and measurement accuracy of the stress sensor is reduced. This problem needs to be solved urgently. Summary of the invention

[0004] In order to facilitate installation of a stress sensor in a rod-shaped driving structure and to improve measurement accuracy, the present application provides a mounting structure and a mounting method for a stress sensor.

[0005] The present application provides a stress sensor installation structure and installation method, which adopts the following technical solutions: A mounting structure for a stress sensor, used to be arranged on the side wall of a rod-shaped driving structure, the mounting structure comprising a stress sensor, a seal seat, a signal line, a terminal connector and a packaging mechanism, the stress sensor is embedded in the bottom of the seal seat, one end of the signal line penetrates into the seal seat and is connected to the stress sensor, the other end of the signal line is connected to the terminal connector, the bottom of the seal seat faces the rod-shaped driving structure and is fixed to the side wall of the rod-shaped driving structure, the packaging mechanism is arranged on the side wall of the rod-shaped driving structure to shape the seal seat and fix the stress sensor tightly to the side wall of the rod-shaped driving structure.

[0006] By adopting the above technical solution, the stress sensor is embedded in the bottom of the glue seal seat, the bottom of the glue seal seat faces the rod-shaped driving structure and is fixed to the side wall of the rod-shaped driving structure. The glue seal seat encapsulates the stress sensor, which is beneficial to prevent external factors from interfering with stress measurement. The stress sensor senses the stress change in the rod-shaped driving structure, and then feeds back the stress change through the signal line and the signal transmission of the terminal connector, which is beneficial to improve the accuracy of stress measurement. The packaging mechanism forms the glue seal seat and fixes the stress sensor tightly to the side wall of the rod-shaped driving structure. The structure is simple and the installation and operation of the stress sensor are simple, so it is convenient to install the stress sensor in the rod-shaped driving structure.

[0007] Preferably, the stress sensor is configured as a sheet-type stress sensor, the sheet-type stress sensor abuts against the side wall of the rod-shaped driving structure, and the surface where the sheet-type stress sensor abuts against the side wall of the rod-shaped driving structure is flush with the bottom plane of the glue seal seat.

[0008] By adopting the above technical solution, the sheet-type stress sensor can increase the sensing area, making it easier to sense the stress changes of the rod-shaped driving structure, while helping to improve the sensing accuracy.

[0009] Preferably, the packaging mechanism includes a glue injection molding part and a demolding part. When the thin-sheet stress sensor is abutted against the side wall of the rod-shaped driving structure, the glue injection molding part covers the thin-sheet stress sensor. A space is formed inside the glue injection molding part for the glue seal seat to be cured and formed. After the glue seal seat is cured and formed, the demolding part is used to separate the glue injection molding part from the glue seal seat.

[0010] By adopting the above technical scheme, when the thin-sheet stress sensor is pressed against the side wall of the rod-shaped driving structure, the glue injection molding part covers the thin-sheet stress sensor. At this time, a space for the glue seal seat to be cured and formed is formed inside the glue injection molding part. Glue is injected into the internal space of the glue injection molding part and cured to form a glue seal seat. The cured glue seal seat fixes the thin-sheet stress sensor on the side wall of the rod-shaped driving structure and realizes the encapsulation of the thin-sheet stress sensor. Then, the demolding part separates the glue injection molding part and the glue seal seat. The operation is simple and convenient.

[0011] Preferably, the glue injection molding part is configured as a mold barrel, and a glue injection hole for injecting glue into the mold barrel is provided on a side wall of the mold barrel.

[0012] By adopting the above technical solution, glue is injected into the mold barrel through the glue injection hole, thereby facilitating the glue injection operation.

[0013] Preferably, the inner side wall of the mold barrel is arranged in an annular step.

[0014] By adopting the above technical solution, this arrangement makes the molded glue seal seat have a step-like shape, which is beneficial to improving the stability of the glue seal seat fixing the thin-sheet stress sensor on the side wall of the rod-shaped driving structure.

[0015] Preferably, a waist-shaped hole is provided on the top of the mold barrel for the signal wire and the terminal connector to pass through.

[0016] By adopting the above technical solution, when the mold barrel covers the thin-sheet stress sensor, the signal wire and the terminal connector pass through the waist-shaped hole from the mold barrel, thereby avoiding interference of the signal wire and the terminal connector with the injection molding operation.

[0017] Preferably, the inner side wall of the mold cylinder is coated with mold release glue.

[0018] By adopting the above technical solution, the inner side wall of the mold cylinder is coated with demoulding glue to facilitate the subsequent demoulding operation of the demoulding parts.

[0019] Preferably, the demoulding member is configured as a demoulding bolt, and a demoulding screw hole adapted to the demoulding bolt is provided on the top of the mold cylinder.

[0020] By adopting the above technical solution, when the glue solidifies to form a glue sealing layer, the staff screws the demoulding bolt into the demoulding screw hole. As the demoulding bolt enters the demoulding screw hole and the demoulding bolt presses against the glue sealing seat, the mold cylinder moves away from the glue sealing seat, thereby realizing the separation of the mold cylinder and the glue sealing seat for demoulding operation.

[0021] Preferably, the number of the demoulding screw holes is set to two, and the two demoulding screw holes are symmetrically arranged on opposite sides of the waist-shaped hole.

[0022] By adopting the above technical solution, this arrangement is beneficial to improving the stability of the demoulding operation.

[0023] A method for installing a stress sensor, comprising using the above-mentioned installation structure of the stress sensor, comprises the following steps: S1: patch, the thin sheet stress sensor is attached to the side wall of the rod-shaped driving structure; S2: Glue injection packaging, the mold cylinder is placed on the thin-film stress sensor, and then the staff injects glue into the mold cylinder through the glue injection hole, and the glue is cured to form a glue seal; S3: Demolding. The staff uses the demoulding bolt to thread into the demoulding screw hole. As the demoulding bolt gradually penetrates into the demoulding screw hole, the mold cylinder is separated from the rubber seal seat.

[0024] By adopting the above technical scheme, when the stress sensor needs to be installed on the rod-shaped driving structure, the staff first presses the thin-film stress sensor against the side wall of the rod-shaped driving structure, and then the mold cylinder covers the thin-film stress sensor and presses it against the side wall of the rod-shaped driving structure. The staff injects glue into the mold cylinder through the glue injection hole, and the glue solidifies in the mold cylinder to form a glue seal seat. The glue seal seat fixes and seals the thin-film stress sensor on the side wall of the rod-shaped driving structure, which is beneficial to reduce the influence of external factors on stress sensing. When the glue solidifies to form the glue seal seat, the staff uses the demoulding bolt to penetrate the demoulding screw hole. As the demoulding bolt enters the demoulding screw hole, the demoulding bolt presses against the glue seal seat, and the mold cylinder moves away from the glue seal seat, thereby realizing the separation of the mold cylinder and the glue seal seat for demoulding operation. In this process, the installation operation is simple and convenient, and it is beneficial to improve the accuracy of measurement.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By arranging a stress sensor, a seal seat, a signal line, a terminal connector and a packaging mechanism, the stress sensor is embedded in the bottom of the seal seat, the bottom of the seal seat faces the rod-shaped driving structure and is fixed to the side wall of the rod-shaped driving structure, the seal seat encapsulates the stress sensor, which is beneficial to prevent external factors from interfering with stress measurement, the stress sensor senses the stress change in the rod-shaped driving structure, and then feeds back the stress change through the signal line and the terminal connector signal transmission, which is beneficial to improve the accuracy of stress measurement, the packaging mechanism forms the seal seat and fixes the stress sensor tightly to the side wall of the rod-shaped driving structure, the structure is simple, and the installation and operation of the stress sensor are simple, so it is convenient to install the stress sensor in the rod-shaped driving structure.

[0026] 2. By setting the stress sensor as a thin-sheet stress sensor, the thin-sheet stress sensor can increase the sensing area, facilitate sensing the stress changes of the rod-shaped driving structure, and at the same time help improve the sensing accuracy.

[0027] 3. By setting the glue injection molding part and the demolding part, when the thin-sheet stress sensor is against the side wall of the rod-shaped driving structure, the glue injection molding part covers the thin-sheet stress sensor. At this time, a space for the glue seal seat to be cured and formed is formed inside the glue injection molding part. Glue is injected into the internal space of the glue injection molding part and cured to form a glue seal seat. The cured glue seal seat fixes the thin-sheet stress sensor on the side wall of the rod-shaped driving structure and realizes the encapsulation of the thin-sheet stress sensor. Then the demolding part separates the glue injection molding part and the glue seal seat. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the slide type electric rod in the embodiment of the present application.

[0029] Figure 2 It is a cross-sectional view of a slide-type electric rod in an embodiment of the present application.

[0030] Figure 3 It is a structural schematic diagram of the stress sensor installation structure in an embodiment of the present application.

[0031] Figure 4 It is a structural schematic diagram of the stress sensor installation structure from another perspective in the embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of the structure when the sheet-type stress sensor is installed on a slide-type electric rod in an embodiment of the present application.

[0033] Figure 6 It is a schematic diagram of the structure of the protective cover in the embodiment of the present application.

[0034] Description of reference numerals: 1. Glue seal seat; 2. Signal line; 3. Terminal connector; 4. Packaging mechanism; 41. Mold cylinder; 42. Demolding bolt; 5. Thin-sheet stress sensor; 7. Glue injection hole; 9. Waist-shaped hole; 11. Demolding screw hole; 12. Slide type electric rod; 121. Electric cylinder; 122. Output shaft sleeve; 123. Screw rod; 124. Mounting plate; 125. Slide rail workbench; 13. First magnetic induction switch; 14. Second magnetic induction switch; 15. Magnetic part; 16. Protective cover. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The present application embodiment discloses a stress sensor installation structure, referring to Figure 1 and Figure 2 , used to be arranged on the side wall of the rod-shaped driving structure. In the present embodiment, the rod-shaped driving structure is selected as a slide-type electric rod 12. The slide-type electric rod 12 includes an electric cylinder 121, an output shaft sleeve 122, a screw rod 123, a mounting plate 124 and a slide rail workbench 125. The electric cylinder 121 drives the output shaft sleeve 122 to rotate. The electric cylinder 121 has a controller. The controller can receive signals and control the output power of the electric cylinder 121. The screw rod 123 is threadedly penetrated into the output shaft sleeve 122, and one end of the screw rod 123 is fixedly connected to the slide rail workbench 125. The mounting plate 124 is fixedly connected to the side wall of the electric cylinder 121 along the length direction of the screw rod 123, and the slide rail workbench 125 is slidably connected to the mounting plate 124. The controller controls the output power of the electric cylinder 121, the electric cylinder 121 drives the conveying sleeve to rotate, the output sleeve 122 rotates to drive the screw rod 123 to move along its length direction, and the movement of the screw rod 123 drives the slide rail workbench 125 to move on the mounting plate 124, thereby completing the action process.

[0037] Reference Figure 1 and Figure 2 , the first magnetic induction switch 13 and the second magnetic induction switch 14 are fixedly arranged at both ends of the mounting plate 124, and the first magnetic induction switch 13 and the second magnetic induction switch 14 are both electrically connected to the controller. At the same time, a magnetic member 15 is fixedly arranged on the slide rail workbench 125. When the slide rail workbench 125 moves, the magnetic member 15 is driven to move and can pass through the first magnetic induction switch 13 and the second magnetic induction switch 14. When the magnetic member 15 passes through the first magnetic induction switch 13 or the second magnetic induction switch 14, the first magnetic induction switch 13 or the second magnetic induction switch 14 sends an electrical signal to the controller, and the controller controls the electric cylinder 121 to perform a reversing rotation drive to realize the path limit during the movement of the slide rail workbench 125. In this embodiment, the magnetic member 15 is set as a magnet, and the magnet is fixed to the slide rail workbench 125 through a fixing block, which will not be described in detail here.

[0038] Reference Figure 3 and Figure 4 The stress sensor installation structure includes a stress sensor, a seal seat 1, a signal line 2, a terminal connector 3 and a packaging mechanism 4. The stress sensor is embedded in the bottom of the seal seat 1. One end of the signal line 2 penetrates into the seal seat 1 and is connected to the stress sensor by telecommunication. The other end of the signal line 2 is connected to the terminal connector 3. The terminal connector 3 is connected to the controller. Figure 5 The bottom of the seal seat 1 faces the slide-type electric rod 12 and is fixed to the side wall of the electric cylinder 121. The packaging mechanism 4 is arranged on the side wall of the slide-type electric rod 12 to form the seal seat 1 and fix the stress sensor to the side wall of the slide-type electric rod 12. The stress sensor senses the stress change in the slide-type electric rod 12, and then transmits the signal through the signal line 2 and the terminal connector 3 to feedback the stress change, so as to improve the accuracy of the stress measurement. At the same time, the packaging mechanism 4 fixes the seal seat 1 to the side wall of the electric cylinder 121 and packages the stress sensor, which is conducive to avoiding interference of external factors on the stress measurement. The structure is simple and the installation operation is easy, so that it is convenient to install the stress sensor in the slide-type electric rod 12.

[0039] Reference Figure 3 and Figure 4 The stress sensor is configured as a thin-sheet stress sensor 5, which is pressed against the side wall of the electric cylinder 121. The surface of the thin-sheet stress sensor 5 pressed against the side wall of the electric cylinder 121 is flush with the bottom plane of the seal seat 1, so as to sense the stress changes of the slide-type electric rod 12, thereby facilitating the improvement of the sensing accuracy.

[0040] Reference Figure 3 and Figure 5 The packaging mechanism 4 includes a glue injection molding part and a demolding part. When the thin-sheet stress sensor 5 is against the side wall of the electric cylinder 121, the glue injection molding part covers the thin-sheet stress sensor 5, and a space for the glue seal seat 1 to be cured is formed inside the glue injection molding part. After the glue seal seat 1 is cured, the demolding part is used to separate the glue injection molding part from the glue seal seat 1 to realize the packaging of the thin-sheet stress sensor 5.

[0041] Reference Figure 3 and Figure 4 The injection molding part is provided as a mold cylinder 41, and a glue injection hole 7 for injecting glue into the mold cylinder 41 is provided on the side wall thereof. The diameter of the glue injection hole 7 gradually decreases toward the direction close to the center axis of the mold cylinder 41, so as to facilitate the glue to flow into the mold cylinder 41. Figure 5The glue injected into the mold barrel 41 is solidified to form a glue seal seat 1 to achieve the packaging operation of the thin-sheet stress sensor 5. It should be noted that the inner side wall of the mold barrel 41 is arranged in an annular step so that the molded glue seal seat 1 is in a step shape, which is conducive to improving the stability of the glue seal seat 1 fixing the thin-sheet stress sensor 5 on the side wall of the electric cylinder 1.

[0042] Reference Figure 3 and Figure 4 A waist-shaped hole 9 is provided at the top of the mold cylinder 41 for the signal line 2 and the terminal connector 3 to pass through. The waist-shaped hole 9 is located in the middle position of the top of the mold cylinder 41 and passes through the central axis of the mold cylinder 41. When the mold cylinder 41 covers the thin-film stress sensor 5, the signal line 2 and the terminal connector 3 pass through the waist-shaped hole 9 from the inside of the mold cylinder 41 to prevent the signal line 2 and the terminal connector 3 from interfering with the glue injection operation inside the mold cylinder 41.

[0043] Reference Figure 3 , Figure 4 as well as Figure 5 , when the glue solidifies in the mold cylinder 41 to form the glue seal seat 1, the glue seal seat 1 not only fixes the thin-film stress sensor 5 on the side wall of the electric cylinder 121, but also fixes the mold cylinder 41 on the glue seal seat 1. In order to separate the mold cylinder 41 from the glue seal seat 1, the demolding part is set as a demolding bolt 42, and the top of the mold cylinder 41 is provided with a demolding screw hole 11 that is compatible with the demolding bolt 42. The staff thread the demolding bolt 42 into the demolding screw hole 11. When the demolding bolt 42 is inserted into the position abutting against the glue seal seat 1, the staff continues to twist the demolding bolt 42, and the end of the demolding bolt 42 abuts against the glue seal seat 1. At this time, the mold cylinder 41 has a tendency to move away from the glue seal seat 1, so that the mold cylinder 41 and the glue seal seat 1 are loosened, thereby separating the glue seal seat 1 from the mold cylinder 41. Furthermore, the number of the demoulding screw holes 11 is set to two, and the two demoulding screw holes 11 are symmetrically arranged on opposite sides of the waist-shaped hole 9. When the demoulding operation is required, the demoulding bolts 42 are alternately screwed in the two demoulding screw holes 11 to improve the demoulding stability. In addition, the inner wall of the mold barrel 41 is also coated with demoulding glue to improve the convenience of the demoulding operation.

[0044] Reference Figure 6 The side wall of the electric cylinder 121 is also provided with a protective cover 16 for covering the rubber seal seat 1. The protective cover 16 is fixed to the side wall of the electric cylinder 121 by bolts to protect the rubber seal seat 1, and the signal line 2 and the terminal connector 3 are passed through the protective cover 16 to facilitate connection with the controller.

[0045] The embodiment of the present application further discloses a method for installing a stress sensor, including using the above-mentioned installation structure of the stress sensor, and comprising the following steps: S1: Paste the sheet-type stress sensor 5 against the side wall of the electric cylinder 121; S2: Glue injection packaging, the mold barrel 41 is covered on the thin-sheet stress sensor 5, the signal line 2 and the terminal connector 3 first pass through the waist-shaped hole 9 from the mold barrel 41, and then the staff injects glue into the mold barrel 41 through the glue injection hole 7. After the glue is cured, a glue seal seat 1 is formed. At this time, the glue seal seat 1 together with the thin-sheet stress sensor 5 is fixed to the side wall of the electric cylinder 121, and the mold barrel 41 is fixed on the glue seal seat 1; S3: Demolding. The staff uses the demoulding bolt 42 to thread into the demoulding screw hole 11. As the demoulding bolt 42 gradually penetrates into the demoulding screw hole 11, the mold cylinder 41 is separated from the glue sealing seat 1, so that the thin-film stress sensor 5 is connected to the slide-type electric rod 12. The glue sealing seat 1 encapsulates the thin-film stress sensor 5, which is beneficial to reduce the interference of external factors on the test, and the installation is convenient and quick.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stress sensor installation structure, characterized in that: Used to be arranged on the side wall of the rod-shaped driving structure, the installation structure comprises a stress sensor, a seal seat (1), a signal line (2), a terminal connector (3) and a packaging mechanism (4), the stress sensor is embedded in the bottom of the seal seat (1), one end of the signal line (2) penetrates into the seal seat (1) and is connected to the stress sensor, and the other end of the signal line (2) is connected to the terminal connector (3), the bottom of the seal seat (1) faces the rod-shaped driving structure and is fixed to the side wall of the rod-shaped driving structure, and the packaging mechanism (4) is arranged on the side wall of the rod-shaped driving structure to shape the seal seat (1) and to press the stress sensor against the side wall of the rod-shaped driving structure.

2. The installation structure of a stress sensor according to claim 1, characterized in that: The stress sensor is configured as a thin sheet stress sensor (5), the thin sheet stress sensor (5) is in contact with the side wall of the rod-shaped driving structure, and the surface where the thin sheet stress sensor (5) is in contact with the side wall of the rod-shaped driving structure is flush with the bottom plane of the glue seal seat (1).

3. The installation structure of a stress sensor according to claim 1, characterized in that: The packaging mechanism (4) comprises a glue injection molding part and a demoulding part. When the thin-sheet stress sensor (5) is pressed against the side wall of the rod-shaped driving structure, the glue injection molding part covers the thin-sheet stress sensor (5). A space is formed inside the glue injection molding part for the glue seal seat (1) to be cured. After the glue seal seat (1) is cured, the demoulding part is used to separate the glue injection molding part from the glue seal seat (1).

4. The installation structure of a stress sensor according to claim 1, characterized in that: The glue injection molding part is configured as a mold barrel (41), and a glue injection hole (7) for injecting glue into the mold barrel (41) is provided on a side wall thereof.

5. The installation structure of a stress sensor according to claim 4, characterized in that: The inner side wall of the mold cylinder (41) is arranged in an annular step shape.

6. The installation structure of a stress sensor according to claim 5, characterized in that: The top of the mold barrel (41) is provided with a waist-shaped hole (9) for the signal line (2) and the terminal connector (3) to pass through.

7. The installation structure of a stress sensor according to claim 6, characterized in that: The inner side wall of the mold cylinder (41) is coated with mold release glue.

8. The installation structure of a stress sensor according to claim 6, characterized in that: The demoulding member is configured as a demoulding bolt (42), and a demoulding screw hole (11) adapted to the demoulding bolt (42) is provided on the top of the mold cylinder (41).

9. The installation structure of a stress sensor according to claim 8, characterized in that: The number of the demoulding screw holes (11) is set to two, and the two demoulding screw holes (11) are symmetrically arranged on opposite sides of the waist-shaped hole (9).

10. A method for installing a stress sensor, comprising using the installation structure of the stress sensor according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: patch, the thin sheet stress sensor (5) is attached to the side wall of the rod-shaped driving structure; S2: Glue injection and packaging, the mold cylinder (41) is placed on the thin-sheet stress sensor (5), and then the staff injects glue into the mold cylinder (41) through the glue injection hole (7), and the glue is cured to form a glue sealing seat (1); S3: Demolding. The staff uses the demoulding bolt (42) to thread into the demoulding screw hole (11). As the demoulding bolt (42) gradually penetrates into the demoulding screw hole (11), the mold cylinder (41) is separated from the glue sealing seat (1).

Images