Multi-beam anti-bending moment tension and compression bidirectional sensor

Abstract

The utility model discloses a multi-beam anti-bending moment tension and compression bidirectional sensor, and belongs to the technical field of sensors. The device mainly comprises a housing; the stress end is mounted at the upper end of the housing; the fixed end is mounted at the lower end of the housing; the elastic bodies are mounted between the stress end and the fixed end, and the elastic bodies are circumferentially arranged between the stress end and the fixed end; and the T-shaped sheet is arranged at the middle position of the elastic body. According to the multi-beam anti-bending moment tension and pressure bidirectional sensor, through the elastic bodies arranged circumferentially, after the tension and pressure sensor rotates by an angle, the relative position between the strain gauge and the force acting direction is prevented from changing, and therefore the effect that the testing precision is not affected is achieved.

Description

Technical Field

[0001] This application relates to the technical field of sensors, and specifically to a multi-beam anti-bending moment tensile and compressive bidirectional sensor. Background Technique

[0002] The principle of the tensile and compressive bidirectional sensor is mainly based on the strain effect, especially the resistance strain effect. This kind of sensor can simultaneously measure the forces generated during the stretching and compression of an object and convert them into measurable and processable electrical signals.

[0003] However, in actual use, after many tensile and compressive sensors rotate by an angle, the relative position between the strain gauge and the force application direction may change, resulting in a change in the corresponding relationship between the strain signal and the actual force, thus having a great impact on the detection result.

[0004] Therefore, it is necessary to provide a multi-beam anti-bending moment tensile and compressive bidirectional sensor to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technique section is only used to understand the background technique of the concept of this application, and therefore, it may include information that does not constitute the prior art. Summary of the Invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a multi-beam anti-bending moment tensile and compressive bidirectional sensor to solve the problem that after the tensile and compressive sensor rotates by an angle, the relative position between the strain gauge and the force application direction changes, resulting in inaccurate detection results.

[0007] The technical solution adopted by this application to solve its technical problems is: a multi-beam anti-bending moment tensile and compressive bidirectional sensor, including:

[0008] A housing;

[0009] A force receiving end, which is installed at the upper end of the housing;

[0010] A fixed end, which is installed at the lower end of the housing;

[0011] An elastomer, which is installed between the force receiving end and the fixed end, and the elastomer is arranged in a circular pattern between the force receiving end and the fixed end;

[0012] A T-shaped piece, which is installed at the middle position of the elastomer.

[0013] Further, one side of the T-shaped piece is a horizontal wire grid, and the other side is a vertical wire grid, and there are four welding points on the T-shaped piece.

[0014] Further, a sealing ring is fixedly arranged at the connection between the housing and the force receiving end.

[0015] Further, an upper connecting block is fixedly arranged at a position inside the housing at the lower end of the force receiving end, a lower connecting block is fixedly arranged at one end of the fixed end close to the housing, and a sealing ring is fixedly arranged at the connection between the lower connecting block and the housing.

[0016] Further, fastening threads are provided on the fixed end, and force receiving threads are provided on the force receiving end.

[0017] Further, a junction box is fixedly arranged on the outer side of the housing, and a connector is fixedly arranged at one end of the junction box.

[0018] Further, thread relief grooves are provided on the force receiving end and the fixed end, and the thread relief grooves are arc-shaped.

[0019] The beneficial effect of the present application is as follows: A multi-beam anti-bending moment tensile and compressive bidirectional sensor provided by the present application achieves the effect that when the tensile and compressive force sensor rotates by an angle, the relative position between the strain gauge and the force action direction does not change, so as not to affect the test accuracy through the circumferentially arranged elastic bodies.

[0020] In addition to the purposes, features, and advantages described above, the present application has other purposes, features, and advantages. The following will refer to the drawings to further describe the present application in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings constituting a part of the present application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0022] Figure 1 is an overall schematic diagram of a multi-beam anti-bending moment tensile and compressive bidirectional sensor in the present application;

[0023] Figure 2 is a sectional exploded schematic diagram of a multi-beam anti-bending moment tensile and compressive bidirectional sensor in the present application;

[0024] Figure 3 is a front view of a multi-beam anti-bending moment tensile and compressive bidirectional sensor in the present application;

[0025] Figure 4 is a schematic diagram of a T-shaped piece;

[0026] Figure 5 is a schematic diagram of a Wheatstone bridge;

[0027] Among them, the reference numerals in the drawings:

[0028] 1. Sensor; 2. Fixed end; 3. Thread relief groove; 4. Force-receiving end; 5. Elastomer; 6. Sealing ring; 7. Wheatstone bridge; 8. Upper connecting block; 9. Housing; 10. Junction box; 11. Connector; 12. T-shaped piece; 13. Lower connecting block; 7. Wheatstone bridge; 71. EXC+; 72. SIG+; 73. Shiled; 74. SIG-; 75. EXC-; 14. Horizontal wire grid; 15. Vertical wire grid; 16. Solder joint. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] As Figures 1 - 3 shown, the present application provides a multi-beam anti-bending tensile and compressive bidirectional sensor, including a sensor 1, which is used to convert the received tensile force and compressive force into measurable electrical signals, and is suitable for the requirements of more complex application scenarios;

[0032] The sensor 1 includes a housing 9, which is used to protect the sensitive components inside the sensor 1 from external environmental interference and damage. At the same time, in order to ensure the normal operation and long-term stability of the sensor, the housing 9 functions as dust-proof, waterproof, etc. And a force-receiving end 4 is fixedly arranged at the upper end of the housing 9, which is used to receive the external tensile force and compressive force, and a force-receiving thread is provided on the force-receiving end 4, and it is connected to an external auxiliary test component through the force-receiving thread;

[0033] At the same time, a sealing ring 6 is fixedly arranged at the connection between the housing 9 and the force-receiving end 4, which is used to strengthen the sealing inside the sensor 1 and prevent impurities such as dust and moisture in the external environment from entering the inside of the sensor 1 and affecting the measurement accuracy and the service life of the sensor;

[0034] And an upper connecting block 8 is fixedly arranged at the lower end of the force-receiving end 4 inside the housing 9, and the upper connecting block 8 is fixed on the measurement system of the sensor 1 to ensure the firmness and reliability of the connection;

[0035] Meanwhile, a fixed end 2 is fixedly arranged at the lower end of the housing 9. The fixed end 2 firmly mounts the sensor on the object to be measured, and a fastening thread is provided on the fixed end 2 so that the sensor can stably maintain its position when stressed, thereby accurately measuring the stress condition;

[0036] A lower connecting block 13 is fixedly arranged at one end of the fixed end 2 close to the housing 9. The lower connecting block 13 is used to fix the sensor 1 on the fixed end 2, thereby ensuring that the sensor 1 can accurately and reliably measure the external tensile force and pressure;

[0037] Meanwhile, a sealing ring 6 is also fixedly arranged at the connection between the lower connecting block 13 and the housing 9, further enhancing the sealing performance of the sensor 1;

[0038] And a thread relief groove 3 is provided at the connections between the lower connecting block 13 and the fixed end 2, and between the upper connecting block 8 and the stress end 4. The thread relief groove 3 is arc-shaped, thereby reducing the stress inflection point and increasing the service life of the sensor;

[0039] And a plurality of elastic bodies 5 are fixedly arranged between the lower connecting block 13 and the upper connecting block 8. The elastic body 5 is a key component in the sensor 1 for sensing force and deformation. The elastic body 5 can undergo elastic deformation when subjected to an external force;

[0040] And the elastic bodies 5 are arranged in a circular pattern between the lower connecting block 13 and the upper connecting block 8. Thus, when the angle of the sensor 1 is rotated, the elastic bodies 5 can utilize multiple elastic bodies 5 according to the outer circle size of the application scenario to reduce the influence on the measurement accuracy caused by off-axis load, azimuth error, etc., so that the influence on the measurement accuracy is small when the sensor 1 rotates;

[0041] Meanwhile, a T-shaped piece 12 is pasted at the middle position of the elastic body 5 to form a Wheatstone bridge for strain output, and the output signal is an mV voltage signal, as Figure 5 shown. One side of the T-shaped piece 12 is provided with a horizontal wire grid 14, and the other side is provided with a vertical wire grid 15. And four welding points 16 are provided on the T-shaped piece 12 to stably output the signal;

[0042] Meanwhile, a junction box 10 is fixedly arranged on the outer side of the housing 9. One end of the junction box 10 is fixedly provided with a connector 11, and the connector 11 is suitable for communicating or transmitting data with an external device or system;

[0043] When testing the pressure, the T-shaped piece 12 is pasted on the elastic body 5. The elastic body 5 is the main strain structure of the sensor 1. The fixed end 3 of the sensor 1 is fixed to the outside through the bottom thread, and the stress end 4 bears the pressure from above through the stress thread fixedly arranged on the outer ring;

[0044] When the force-receiving end 4 is subjected to pressure, the elastic body 5 will bend downward, driving the T-shaped piece 12 to stretch or compress. According to R = ρl / s, the change in the length of the T-shaped piece 12 causes a change in the resistance value, ultimately resulting in a change in the output voltage value. This output voltage value is the output sensitivity of the sensor. And the bridge circuit formed by connecting these strain gauges in series or parallel is called a Wheatstone bridge 7;

[0045] As Figure 5 shown, the Wheatstone bridge 7 includes EXC+71, EXC-75, Shiled73, SIG+72, and SIG-74. Among them, EXC+71 and EXC-75 are input voltages, SIG+72 and SIG-74 are output signals, and Shiled73 is a shield wire;

[0046] And when testing the tensile force, the external auxiliary test component can be connected through the force-receiving thread between the force-receiving end 4 and the bottom fixed end 2 and the fixed end 2;

[0047] At the same time, in order to enable the fixed end 2 to quickly disassemble the external auxiliary test component when detecting the tensile force, a fastening thread is provided at the top of the fixed end 2. This fastening thread is suitable for quickly disassembling the external auxiliary test component when the sensor 1 is performing a tensile force test.

[0048] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-beam anti-bending tensile and compressive bidirectional sensor, characterized in that: Comprising: A housing (9); A stress end (4), which is installed at the upper end of the housing (9); A fixed end (2), which is installed at the lower end of the housing (9); An elastomer (5), which is installed between the stress end (4) and the fixed end (2), and the elastomer (5) is arranged in a circular pattern between the stress end (4) and the fixed end (2); A T-shaped piece (12), which is installed at the middle position of the elastomer (5).

2. The multi-beam anti-bending moment tensile and compressive two-way sensor according to claim 1, wherein: One side of the T-shaped piece (12) is a horizontal wire grid (14), and the other side is a vertical wire grid (15), and four welding points (16) are arranged on the T-shaped piece (12).

3. A multi-beam anti-bending tensile and compressive bidirectional sensor according to claim 1, characterized in that: A sealing ring (6) is fixedly arranged at the connection between the housing (9) and the stress end (4).

4. A multi-beam anti-bending moment tensile and compressive bidirectional sensor according to claim 1, characterized in that: An upper connecting block (8) is fixedly arranged at the inner position of the lower end of the stress end (4) in the housing (9), a lower connecting block (13) is fixedly arranged at one end of the fixed end (2) close to the housing (9), and a sealing ring (6) is fixedly arranged at the connection between the lower connecting block (13) and the housing (9).

5. A multi-beam anti-bending tensile and compressive bi-directional sensor according to claim 1, characterized in that: A fastening thread is provided on the fixed end (2), and a stress thread is provided on the stress end (4).

6. The multi-beam anti-bending tensile and compressive two-way sensor according to claim 1, characterized in that: A junction box (10) is fixedly arranged on the outer side of the housing (9), and a connector (11) is fixedly arranged at one end of the junction box (10).

7. The multi-beam anti-bending tensile and compressive two-way sensor according to claim 1, characterized in that: A thread relief groove (3) is provided on the stress end (4) and the fixed end (2), and the thread relief groove (3) is arc-shaped.

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