Tension and compression two-way sensor

Abstract

The utility model discloses a tension-compression bidirectional sensor, and belongs to the technical field of sensors. The device mainly comprises a housing top stress end which is mounted at the upper end of the housing; the bottom fixing end is mounted at the lower end of the housing; an elastic body installed inside the housing, the elastic body including: an upper strain beam installed at an upper end of the elastic body; the lower strain beam is arranged at the lower end of the elastic body; the strain gauges are mounted at the upper ends of the upper strain beam and the lower strain beam; and the joint is mounted on the outer side of the housing. According to the tension-compression bidirectional sensor, the strain beams on the upper side and the lower side are arranged, so that the tension and the pressure can be detected at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of sensor technology, and in particular to a tension-compression bidirectional sensor. Background Art

[0002] The tension sensor is based on the principle of physical strain. When subjected to external force (tension), the strain gauge inside it will bend or stretch slightly, causing the resistance value to change. The sensor chip measures the change in resistance value and converts it into an electrical signal (such as voltage or current) for output, thereby measuring the tension.

[0003] The pressure sensor measures the pressure by sensing the pressure signal and converting it into a usable electrical signal output.

[0004] However, the above two sensors can only realize single detection of tension or pressure. In actual use, there may be a situation where tension and pressure need to be detected simultaneously. At this time, the above two sensors cannot realize simultaneous detection of tension and pressure, resulting in low detection efficiency.

[0005] Therefore, it is necessary to provide a tension-compression bidirectional sensor to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0007] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a tension-compression bidirectional sensor, which solves the problem that in actual use, it may be necessary to not detect tension and pressure at the same time, resulting in low detection efficiency.

[0008] The technical solution adopted by the present application to solve the technical problem is: a tension and compression bidirectional sensor, comprising:

[0009] Housing

[0010] A top force-bearing end, which is mounted on the upper end of the housing and is used to bear tension or pressure from above;

[0011] A bottom fixing end, which is mounted on the lower end of the housing and is used to withstand a pulling force from below or a pressure from above;

[0012] An elastic body, which is installed inside the housing, and the elastic body comprises:

[0013] An upper strain beam, the upper strain beam being mounted on an upper end of the elastic body;

[0014] A lower strain beam, which is mounted on the lower end of the elastic body;

[0015] A strain gauge, which is mounted on the upper ends of the upper strain beam and the lower strain beam;

[0016] A connector is installed outside the housing.

[0017] Furthermore, the top force-bearing end includes an upper cover plate fixedly arranged at the upper end of the cover shell, and the bottom fixed end includes a lower cover plate fixedly arranged at the lower end of the cover shell.

[0018] Furthermore, an upper connecting end is fixedly provided at the upper end of the elastic body, a force-bearing thread is fixedly provided at the outer ring of the upper connecting end, and the upper end of the upper connecting end is in the shape of an arc spherical surface;

[0019] An upper strain beam is fixedly arranged on the upper end of the elastic body. The upper strain beam is in an arc shape and has a plurality of groups of small holes.

[0020] Furthermore, a lower strain beam is fixedly provided at the lower end of the elastic body, a bottom connecting piece is fixedly provided inside the lower strain beam, a threaded hole is provided at the bottom of the bottom connecting piece, and an internal thread is fixedly provided inside the threaded hole.

[0021] Furthermore, a junction box is fixedly arranged on the outer side of the cover shell.

[0022] Furthermore, dustproof cotton is fixedly provided at the connection between the upper cover plate and the upper end of the cover shell, and at the connection between the lower cover plate and the lower end of the cover shell.

[0023] The beneficial effect of the present application is that the present application provides a tension-compression bidirectional sensor, which can detect tension and pressure at the same time by setting strain beams on the upper and lower sides, thereby improving the detection efficiency.

[0024] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0026] In the attached picture:

[0027] Figure 1 This is an overall schematic diagram of a tension-compression bidirectional sensor in this application;

[0028] Figure 2 for Figure 1Explosion diagram of the top load-bearing end;

[0029] Figure 3 for Figure 1 Schematic diagram of the middle top force-bearing end;

[0030] Figure 4 for Figure 1 Exploded diagram of the fixed end of the middle bottom;

[0031] Figure 5 for Figure 1 Schematic diagram of the fixed end of the middle bottom;

[0032] Figure 6 for Figure 3 Schematic diagram of the structure of the elastic body;

[0033] Figure 7 This is a schematic diagram of a Wheatstone bridge;

[0034] Among them, the reference numerals in the figure are:

[0035] 1. Cover; 2. Bottom fixed end; 3. Top force-bearing end; 4. Junction box; 5. Connector; 31. Upper cover;

[0036] 32. dustproof cotton; 33. upper connecting end; 34. upper strain beam; 22. bottom connecting piece; 23. lower cover plate;

[0037] 25. Lower strain beam; 6. Sensor; 7. Wheatstone bridge; 71. EXC+; 72. SI G+; 73. Sh i led;

[0038] 74. SI G-; 75. EXC-; 35. Elastomer; 36. Semiconductor; 37. Strain gauge. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] like Figure 1-Figure 3As shown, the present application provides a tension-compression bidirectional sensor, including a sensor 6, which is suitable for measuring forces in two directions simultaneously, thereby meeting the needs of more complex application scenarios;

[0042] The sensor 6 comprises a housing 1, the interior of the housing 1 is hollow, and a top force-bearing end 3 is arranged at the upper end of the housing 1, and the top force-bearing end 3 is suitable for bearing tension or pressure from above;

[0043] The top force-bearing end 3 includes an upper cover plate 31 fixedly arranged on the upper end of the housing 1, and the upper cover plate 31 is used to protect the internal sensitive elements of the sensor 6 and prevent external impurities from entering;

[0044] At the same time, an elastic body 35 is arranged inside the housing 1, and an upper connecting end 33 is fixedly arranged on the upper end of the elastic body 35. The upper connecting end 33 is used to connect an external auxiliary test component. At the same time, a force-bearing thread (not shown in the figure) is fixedly arranged on the outer ring of the upper connecting end 33. The force-bearing thread is suitable for connecting with an external auxiliary test component, bearing the tension or pressure from above, and transmitting the external force to the elastic body 35 inside the sensor 6. The upper end of the upper connecting end 33 is in the shape of an arc spherical surface, so that when testing the pressure, the center of gravity of the downward load is at the center of the sensor 6;

[0045] At the same time, an upper strain beam 34 is fixedly provided on the upper end of the elastic body 35, and the upper strain beam 34 is fixedly connected to the upper connecting end 33, so that the upper connecting end 33 can transmit the external force in time, and the upper strain beam 34 is arc-shaped and has multiple groups of small holes (not marked in the figure), which are arranged in a circumference on the upper strain beam 34, so as to enhance the measurement ability and stability of the sensor 6;

[0046] like Figure 1 and Figure 4-Figure 5 As shown, a bottom fixing end 2 is provided at the lower end of the cover shell 1, and the bottom fixing end 2 is used to withstand the pulling force from below or the pressure from above;

[0047] The bottom fixed end 2 includes a lower cover plate 23 fixedly arranged at the lower end of the cover shell 1, and a lower strain beam 25 is fixedly arranged at the lower end of the elastic body 35, and the lower strain beam 25 and the upper strain beam 34 have the same structure, and the lower strain beam 25 is suitable for improving the overall strength, and a bottom connector 22 is fixedly arranged inside the lower strain beam 25, and a threaded hole is opened at the bottom of the bottom connector 22 (not shown in the figure), and the bottom connector 22 is suitable for connecting an external auxiliary test component;

[0048] like Figure 3 , Figure 5 , Figure 7As shown, strain gauges 37 are attached to the upper strain beam 34 and the lower strain beam 25 for sensing deformation and converting it into electrical signals, thereby realizing detection and measurement, and two groups of semiconductors 36 are attached to the upper strain beam 34 and the lower strain beam 25 for linear compensation;

[0049] At the same time, a junction box 4 is fixedly arranged on the outside of the housing 1, and a connector 5 is fixedly arranged at one end of the junction box 4, and the connector 5 is suitable for communication or data transmission with an external device or system;

[0050] When testing the pressure, the upper strain beam 34 and the lower strain beam 25 are the main strain structures of the sensor 6. The bottom fixed end 2 of the sensor 6 is fixed to the outside through the bottom threaded hole, and the top force-bearing end 3 bears the pressure from above through the force-bearing thread fixedly arranged on the outer ring of the upper connecting end 33;

[0051] When the top force-bearing end 3 is subjected to pressure, the upper strain beam 34 and the lower strain beam 25 will bend downward, causing the strain gauge 37 to stretch or compress. According to R=ρl / s, the length of the strain gauge 37 changes, causing the resistance value to change, and finally causing the output voltage value to change. This output voltage value is the output sensitivity of the sensor 6. The bridge circuit composed of these strain gauges 37 connected in series or in parallel is called a Wheatstone bridge 7;

[0052] like Figure 7 As shown, the Wheatstone bridge 7 includes EXC+71, EXC-75, Shielded73, SIG+72 and SIG-74, wherein EXC+71 and EXC-75 are input voltages, SIG+72 and SIG-74 are output signals, and Shielded73 is a shielding line.

[0053] And when testing the tension, the external auxiliary test component can be connected through the force-bearing thread of the top force-bearing end 3 and the bottom fixed end 2 and the bottom connecting piece 22. It should be noted that the external auxiliary test component here can be a fisheye bearing commonly used in the prior art and suitable for the present application, which is used to test the tension;

[0054] At the same time, in order to enable the bottom fixed end 2 to quickly disassemble the external auxiliary test components when detecting the tension, an internal thread is fixedly provided inside the bottom connecting member 22, and the internal thread is suitable for quickly disassembling the external auxiliary test components when the sensor 6 is performing a tension test;

[0055] like Figure 1 and Figure 3As shown, in order to further improve the protection level of the sensor 6, dustproof cotton 32 is fixedly provided at the connection between the upper cover plate 31 and the upper end of the housing 1 and the lower cover plate 23 and the lower end of the housing 1. The dustproof cotton 32 is used to improve the protection level of the sensor 6 and prevent external environmental factors such as dust and water vapor from entering the interior of the sensor 6, thereby protecting the sensor 6 from damage or contamination;

[0056] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 tension and compression bidirectional sensor, characterized in that: include: Housing(1) A top force-bearing end (3), the top force-bearing end (3) being mounted on the upper end of the housing (1), the top force-bearing end (3) being used to bear a tensile force or a compressive force from above; A bottom fixing end (2), the bottom fixing end (2) being mounted on the lower end of the housing (1), the bottom fixing end (2) being used to withstand a pulling force from below or a pressure from above; An elastic body (35), the elastic body (35) is installed inside the housing (1), and the elastic body (35) comprises: An upper strain beam (34), the upper strain beam (34) being mounted on the upper end of the elastic body (35); A lower strain beam (25), the lower strain beam (25) being mounted on the lower end of the elastic body (35); A strain gauge (37), the strain gauge (37) being mounted on the upper ends of the upper strain beam (34) and the lower strain beam (25); A joint (5) is installed on the outside of the housing (1).

2. A tension and compression bidirectional sensor according to claim 1, characterized in that: The top force-bearing end (3) comprises an upper cover plate (31) fixedly arranged at the upper end of the cover shell (1), and the bottom fixed end (2) comprises a lower cover plate (23) fixedly arranged at the lower end of the cover shell (1).

3. A tension and compression bidirectional sensor according to claim 1, characterized in that: An upper connecting end (33) is fixedly provided at the upper end of the elastic body (35), a force-bearing thread is fixedly provided on the outer ring of the upper connecting end (33), and the upper end of the upper connecting end (33) is in the shape of an arc spherical surface; An upper strain beam (34) is fixedly arranged on the upper end of the elastic body (35); the upper strain beam (34) is arc-shaped and has a plurality of groups of small holes.

4. A tension and compression bidirectional sensor according to claim 1, characterized in that: A lower strain beam (25) is fixedly arranged at the lower end of the elastic body (35), a bottom connecting piece (22) is fixedly arranged inside the lower strain beam (25), a threaded hole is provided at the bottom of the bottom connecting piece (22), and an internal thread is fixedly arranged inside the threaded hole.

5. A tension and compression bidirectional sensor according to claim 1, characterized in that: A junction box (4) is fixedly arranged on the outer side of the cover shell (1).

6. A tension and compression bidirectional sensor according to claim 2, characterized in that: Dustproof cotton (32) is fixedly provided at the connection between the upper cover plate (31) and the upper end of the cover shell (1) and at the connection between the lower cover plate (23) and the lower end of the cover shell (1).

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