CN209961205U - Cylindrical strain sensor - Google Patents
Cylindrical strain sensor Download PDFInfo
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- CN209961205U CN209961205U CN201921035478.2U CN201921035478U CN209961205U CN 209961205 U CN209961205 U CN 209961205U CN 201921035478 U CN201921035478 U CN 201921035478U CN 209961205 U CN209961205 U CN 209961205U
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Abstract
The application belongs to the technical field of structural strain measurement sensor design, in particular to a cylindrical strain sensor, include: a cylindrical body part, the outer wall surface of which is provided with a first groove; and the strain wire is laid in the first groove in a matching manner, and two wiring ends of the strain wire extend out of the first groove and are positioned outside one axial end of the body part and used for being connected with the measuring lead. The cylindrical strain sensor can directly sense the connection load borne on the cylindrical part to be measured, and can also be used for monitoring the change of the load bearing state of the fastener, so that the strain and the load of the part to be measured can be directly measured, and the defect that a strain gage cannot be pasted on the surface of the cylindrical part to be measured is overcome.
Description
Technical Field
The application belongs to the technical field of structural strain measurement sensor design, and particularly relates to a cylindrical strain sensor.
Background
The conventional strain sensor is mainly in the form of a strain gauge, and the strain gauge or a strain flower is arranged on a measuring point distributed on the surface of a measured structure to measure the strain distribution of the structure. However, for cylindrical fasteners, especially bolts, strain gauges cannot be adhered to the surface of the structure in many cases, and it is difficult to directly measure the strain and the load of the structure, usually by an indirect method, and a certain measurement error is generated.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above technical problems, the present application provides a cylindrical strain sensor.
The application discloses cylindrical strain sensor for measure cylindrical part's that awaits measuring strain and load includes:
the device comprises a cylindrical body part, a first groove and a second groove, wherein the outer wall surface of the body part is provided with the first groove;
the strain wire is laid in the first groove in a matched mode, two wiring ends of the strain wire extend out of the first groove, are located on the outer side of one axial end of the body portion (1), and are used for being connected with a measuring lead.
According to at least one embodiment of the present application, the first trench comprises an inlet section, a transition section and an outlet section connected in series, wherein
The transition section is arranged on the outer wall surface of the body part along the circumferential direction, then bent towards the axis direction, bent towards the circumferential direction from the axis direction, and sequentially circulated to form a continuously bent S-shaped arrangement;
the two terminals of the strain wire are introduced to the axial end of the body portion through the inlet section and the outlet section, respectively.
According to at least one embodiment of the present application, the first trench comprises an inlet section, a transition section and an outlet section connected in series, wherein
The transition sections are arranged on the outer wall surface of the body part in a flower sheet mode;
the two terminals of the strain wire are introduced to the axial end of the body portion through the inlet section and the outlet section, respectively.
According to at least one embodiment of the present application, the cylindrical strain sensor further comprises:
the cylindrical wiring terminal is coaxial and fixedly arranged at one axial end of the body part, at least two second grooves are formed in the outer wall surface of the wiring terminal along the axial direction, and the two wiring terminals of the strain wire are respectively laid in one corresponding second groove; wherein
The measuring lead is used for being cylindrical with the tip that two wiring ends of strain gauge are connected, and its internal diameter equals the terminal external diameter, coaxial cover are established on the terminal, just be provided with two at least electrical contact on the inner wall of measuring lead, be used for respectively with be located in the second slot two wiring ends of strain gauge carry out the electrical contact.
According to at least one embodiment of the application, the outer wall surface of the binding post is provided with a positioning groove, and the inner wall of the measuring lead is provided with a positioning bulge matched with the positioning groove.
According to at least one embodiment of the present application, the cylindrical strain sensor further comprises:
the first bonding part is coaxial and is fixedly arranged at one axial end of the body part, the binding post is fixedly arranged at one axial end, far away from the body part, of the first bonding part, at least two third grooves are formed in the outer surface of the first bonding part, and two wiring ends of the strain wire extending out of the first grooves are respectively laid in the corresponding third grooves and extend to the second grooves of the binding post;
the second bonding part is coaxial and fixedly arranged at the other axial end of the body part, and the outer diameter of the second bonding part is equal to that of the first bonding part and is larger than that of the body part.
According to at least one embodiment of the application, the outer diameter of the measuring lead is equal to the outer diameter of the first adhesive part.
According to at least one embodiment of the present application, the body portion, the post, the first bonding portion, and the second bonding portion are integrally molded members and made of an insulating material.
According to at least one embodiment of the application, the strain wire paste is laid in the corresponding first groove, second groove and third groove.
According to at least one embodiment of the application, the outer surface of the strain wire is provided with an insulating protective layer.
The application has at least the following beneficial technical effects:
the cylindrical strain sensor can directly sense the connection load borne on the cylindrical part to be measured, and can also be used for monitoring the change of the load bearing state of the fastener, so that the strain and the load of the part to be measured can be directly measured, and the defect that a strain gage cannot be pasted on the surface of the cylindrical part to be measured is overcome.
Drawings
FIG. 1 is a schematic view of the structure of a cylindrical strain sensor of the present application (the measurement leads are in perspective view);
fig. 2 is a schematic view of the structure of the measurement lead in the cylindrical strain sensor of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The cylindrical strain sensor of the present application is described in further detail below with reference to fig. 1-2.
The application discloses a cylindrical strain sensor for measuring strain and load of a cylindrical part to be measured, which comprises a body part 1 and a strain wire 2.
The body portion 1 is cylindrical and has a first groove 11 formed in an outer wall surface thereof.
The strain wire 2 can adopt various known strain wires made of suitable materials; the strain wire 2 is laid in the first groove 11 in a matching mode, and two wiring ends of the strain wire 2 extend out of the first groove 11 and are located on the outer side of one axial end of the body portion 1 and used for being connected with the measuring lead 3.
Wherein, the cylindrical strain sensor of this application can cooperate with columniform part to be measured, for example the fastener, can set up the mounting groove on the fastener to install cylindrical strain sensor in the mounting groove, can directly perceive the connecting load that bears on the cylindrical part to be measured, also can be used to monitor the fastener and bear the change of load state, thereby can direct measurement part to be measured's strain and load, compensatied the unable defect of pasting the foil gage on cylindrical part to be measured surface.
Further, the first grooves 11 on the outer wall surface of the body portion 1 may be provided in various suitable layouts as required.
In an embodiment of the present application, as shown in fig. 1, preferably, the first groove 11 may include an inlet section, a transition section, and an outlet section, which are connected in sequence, wherein the transition section is arranged on the outer wall surface of the body portion 1 along the circumferential direction, bent toward the axial direction, bent toward the circumferential direction from the axial direction, and sequentially circulated to form a continuously bent S-shaped arrangement; so that the strain wire 2 is arranged in the first groove 11 in a single-drawing manner to measure the tensile strain; the two terminals of the strain wire 2 are introduced into the axial end portion of the body portion 1 through the inlet section and the outlet section, respectively.
In another embodiment of the present application (not shown), it is preferable that the first groove 11 may include an inlet section, a transition section and an outlet section connected in sequence, wherein the transition section is arranged in a flower piece form on the outer wall surface of the body portion 1 to measure the shear strain; the two terminals of the strain wire 2 are introduced into the axial end portion of the body portion 1 through the inlet section and the outlet section, respectively. It should be noted that the flower piece form arrangement mode belongs to a relatively mature layout mode in the field of strain sensors, and is not described in detail here.
Further, the cylindrical strain sensor of the present application may further include a post 4.
Specifically, the terminal 4 is cylindrical, and is coaxially and fixedly disposed at one axial end of the body portion 1, at least two second grooves 41 are axially disposed on an outer wall surface of the terminal 4, wherein two terminals of the strain wire 2 are respectively laid in one corresponding second groove 41.
Furthermore, the end of the measurement lead 3, which is used for being connected with the two terminals of the strain wire 2, is cylindrical, the inner diameter of the measurement lead is equal to the outer diameter of the terminal 4, the measurement lead is coaxially sleeved on the terminal 4, and the inner wall of the measurement lead 3 is provided with at least two electrical contacts which are respectively used for being electrically contacted with the two terminals of the strain wire 2 in the second groove 41.
Further, among the cylindrical strain sensor of this application, seted up constant head tank 42 on the outer wall of terminal 4, be provided with the location arch 43 with constant head tank 42 looks adaptation on the inner wall of measuring lead wire 3 to conveniently measure lead wire 3's location and installation.
Further, the cylindrical strain sensor of the present application may further include a first adhesive portion 51 and a second adhesive portion 52.
As shown in fig. 1, the first adhesive portion 51 and the second adhesive portion 52 are both cylindrical; the first bonding portion 51 is coaxially and fixedly arranged at one axial end of the body portion 1, the terminal 4 is fixedly arranged at one axial end, far away from the body portion 1, of the first bonding portion 51, at least two third grooves 511 are formed in the outer surface of the first bonding portion 51, and two terminals of the strain wire 2 extending out of the first groove 11 are respectively laid in the corresponding third grooves 511 and extend to the second grooves 41 of the terminal 4.
The second bonding portion 52 is coaxially and fixedly provided at the other end in the axial direction of the main body 1, and the outer diameter of the second bonding portion 52 and the outer diameter of the first bonding portion 51 have the same inner diameter and are both larger than the outer diameter of the main body 1. In addition, the outer diameter of the measurement lead 3 is equal to the outer diameter of the first adhesive portion 51.
Further, the main body 1, the post 4, the first adhesive portion 51, and the second adhesive portion 52 are preferably integrally molded members and made of an insulating material.
Further, the strain wires 2 may be disposed in the corresponding grooves in various suitable manners, and in this embodiment, the strain wires 2 are preferably adhered and laid in the corresponding first groove 11, the second groove 41, and the third groove 511. And, the outer surface of the strain wire 2 is provided with an insulating protective layer for insulation and damage prevention.
Further, in a specific example of the fastener having the strain and load measuring function of the present application, the diameter of the first bonding portion 51 and the second bonding portion 52 is 3.5 mm, and the height of the cylinder is 3 mm; the diameter of the body part 1 for sensing is 2.5 mm, and the height of the cylinder is 4 mm; the diameter of the post 4 for wiring was taken to be 2 mm and the height of the cylinder was 4 mm.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A cylindrical strain sensor for measuring strain and load of a cylindrical part to be measured, comprising:
the device comprises a cylindrical body part (1), wherein a first groove (11) is formed in the outer wall surface of the body part (1);
the strain wire (2) is paved in the first groove (11) in a matched mode, two wiring ends of the strain wire (2) extend out of the first groove (11), and the strain wire is located on the outer side of one axial end of the body portion (1) and used for being connected with the measuring lead (3).
2. The cylindrical strain sensor of claim 1, wherein the first groove (11) comprises an inlet section, a transition section and an outlet section connected in series, wherein
The transition section is arranged on the outer wall surface of the body part (1) along the circumferential direction, then bent towards the axis direction, bent towards the circumferential direction from the axis direction, and sequentially circulated to form a continuous bent S-shaped arrangement;
the two terminals of the strain wire (2) are respectively introduced to the axial end of the body part (1) through the inlet section and the outlet section.
3. The cylindrical strain sensor of claim 1, wherein the first groove (11) comprises an inlet section, a transition section and an outlet section connected in series, wherein
The transition sections are arranged on the outer wall surface of the body part (1) in a flower sheet mode;
the two terminals of the strain wire (2) are respectively introduced to the axial end of the body part (1) through the inlet section and the outlet section.
4. The cylindrical strain sensor of claim 2 or 3, further comprising:
the wire connecting structure comprises a cylindrical wiring terminal (4), wherein the wiring terminal (4) is coaxial and is fixedly arranged at one axial end of the body part (1), at least two second grooves (41) are formed in the outer wall surface of the wiring terminal (4) along the axial direction, and two wiring terminals of the strain wire (2) are respectively laid in one corresponding second groove (41); wherein
The measuring lead (3) is used for being cylindrical with the end part that two wiring ends of strain wire (2) are connected is cylindric, and its internal diameter equals terminal (4) external diameter, coaxial cover are established on terminal (4), just be provided with two at least electrical contacts on the inner wall of measuring lead (3), be used for respectively with be located in second slot (41) two wiring ends of strain wire (2) carry out the electrical contact.
5. The cylindrical strain sensor according to claim 4, wherein a positioning groove (42) is formed on the outer wall surface of the terminal (4), and a positioning protrusion (43) adapted to the positioning groove (42) is formed on the inner wall of the measurement lead (3).
6. The cylindrical strain sensor of claim 4, further comprising:
the first bonding part (51) is coaxial and is fixedly arranged at one axial end of the body part (1), the binding post (4) is fixedly arranged at one axial end, far away from the body part (1), of the first bonding part (51), at least two third grooves (511) are formed in the outer surface of the first bonding part (51), and two wiring ends of the strain wire (2) extending out of the first groove (11) are respectively laid in the corresponding third grooves (511) and extend to the second grooves (41) of the binding post (4);
and a cylindrical second bonding portion (52), wherein the second bonding portion (52) is coaxial and fixedly arranged at the other end of the body portion (1) in the axial direction, and the outer diameter of the second bonding portion (52) is equal to that of the first bonding portion (51) and is larger than that of the body portion (1).
7. The cylindrical strain sensor according to claim 6, wherein the outer diameter of the measurement lead (3) is equal to the outer diameter of the first bonding portion (51).
8. The cylindrical strain sensor according to claim 6, wherein the body portion (1), the post (4), the first adhesive portion (51) and the second adhesive portion (52) are an integrally molded member and made of an insulating material.
9. The cylindrical strain sensor according to claim 7, wherein the strain wire (2) is adhesively laid in the corresponding first groove (11), second groove (41) and third groove (511).
10. The cylindrical strain sensor according to claim 8, wherein the outer surface of the strain wire (2) is provided with an insulating protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921035478.2U CN209961205U (en) | 2019-07-04 | 2019-07-04 | Cylindrical strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921035478.2U CN209961205U (en) | 2019-07-04 | 2019-07-04 | Cylindrical strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209961205U true CN209961205U (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921035478.2U Active CN209961205U (en) | 2019-07-04 | 2019-07-04 | Cylindrical strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209961205U (en) |
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2019
- 2019-07-04 CN CN201921035478.2U patent/CN209961205U/en active Active
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