Triangular wide-range sensor

Abstract

The utility model belongs to the technical field of geotechnical engineering structure health monitoring equipment, and particularly relates to a triangular wide-range sensor. The triangular wide-range sensor comprises an object to be measured, and is characterized in that a first rigid arm and a second rigid arm are fixed on the object to be measured, the tops of the first rigid arm and the second rigid arm are connected through a first hinge, a second hinge is arranged in the middle of the first rigid arm, and a third hinge is arranged in the middle of the second rigid arm; a fixed base body is connected between the second hinge and the third hinge, and a sensor body is arranged on the fixed base body. The beneficial effects of the utility model are that the strain actually sensed by the sensor is reduced through the triangular structure, and the strain is smaller than the actual strain of the structure, so that the wider range of a common sensor is realized, and the sensor has the advantages of simple structure and reliable performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical engineering structure health monitoring equipment, in particular to a triangular large-range sensor. Background Art

[0002] Sensors are widely used in civil engineering, primarily for measuring the safety performance of large structures and bridges, as well as the deformation and internal stress of concrete structures. They offer advantages such as small size, light weight, corrosion resistance, and strong resistance to electromagnetic interference. However, existing conventional sensors have a limited range, which makes them difficult to meet the requirements of measuring large deformations and strains in civil engineering. Utility Model Content

[0003] In order to make up for the deficiencies of the prior art, the utility model provides a triangular large-range sensor with a simple structure, convenient use and reliable performance.

[0004] The utility model is achieved through the following technical solutions:

[0005] A triangular large-range sensor includes an object to be measured, and is characterized in that: a first rigid arm and a second rigid arm are fixed to the object to be measured, the tops of the first rigid arm and the second rigid arm are connected by a first hinge, a second hinge is provided in the middle of the first rigid arm, a third hinge is provided in the middle of the second rigid arm, a fixed base is connected between the second hinge and the third hinge, and a sensor body is provided on the fixed base.

[0006] The second hinge and the third hinge are located at the same height.

[0007] The end of the first rigid arm is fixed to the surface of the object to be measured through a first fixed end, and the end of the second rigid arm is fixed to the surface of the object to be measured through a second fixed end.

[0008] The beneficial effect of the utility model is that the strain actually felt by the sensor is reduced by the triangular structure, making it smaller than the actual strain of the structure, thereby achieving a wider range of ordinary sensors, and having the advantages of simple structure and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] Attachment Figure 1 It is a structural diagram of the utility model;

[0011] Attachment Figure 2 This is the measurement state principle diagram of the utility model;

[0012] In the figure, 1 is the object to be measured, 2 is the first rigid arm, 3 is the second rigid arm, 4 is the first hinge, 5 is the second hinge, 6 is the third hinge, 7 is the fixed base, 8 is the sensor body, 9 is the first fixed end, and 10 is the second fixed end. DETAILED DESCRIPTION

[0013] The accompanying drawings show a specific embodiment of the present invention. This embodiment includes an object to be measured 1, to which a first rigid arm 2 and a second rigid arm 3 are fixed. The tops of the first rigid arm 2 and the second rigid arm 3 are connected by a first hinge 4. A second hinge 5 is provided in the middle of the first rigid arm 2, and a third hinge 6 is provided in the middle of the second rigid arm 3. A fixed base 7 is connected between the second hinge 5 and the third hinge 6, and a sensor body 8 is provided on the fixed base 7. The second hinge 5 and the third hinge 6 are located at the same height. The end of the first rigid arm 2 is fixed to the surface of the object to be measured 1 via a first fixed end 9, and the end of the second rigid arm 3 is fixed to the surface of the object to be measured 1 via a second fixed end 10.

[0014] Using the triangular large-range sensor of the present invention, the first hinge 4 is used to connect the ends of the first rigid arm 2 and the second rigid arm 3, so that it becomes a structure that can be opened and closed. The second hinge 5 is at the same height as the third hinge 6 at the second rigid arm 3 at the first rigid arm 2, and its specific height can be designed to be different according to the test requirements. The sensor body 8 can be attached to the surface of the fixed base 7 or embedded in the fixed base 7. The fixed base 7 is a linear elastic material, and its ultimate elastic strain is 1.2 to 1.5 times the ultimate measurement strain of an ordinary sensor. The first rigid arm 2 and the second rigid arm 3 are rigid materials with a stiffness significantly greater than that of the fixed base 7. During the loading process, their bending deformation can be ignored. The first fixed end 9 and the second fixed end 10 can be fixed to the surface of the object to be measured 1 by gluing or by using a clamp.

[0015] With the triangular, large-range sensor of the present invention, when the object 1 undergoes axial deformation, the distance between the first and second fixed ends 9, 10 increases. Under the action of the first and second rigid arms 2, 3, this increase in distance is transmitted to the sensor body 8. Based on geometric relationships, it can be seen that the length of the triangle base is greater than or equal to any line segment parallel to the base, so the strain sensed by the sensor body 8 is smaller than the actual strain of the structure. This achieves a large-range sensor compared to conventional sensors.

Claims

1. A triangular large-range sensor, comprising an object to be measured (1), characterized in that: A first rigid arm (2) and a second rigid arm (3) are fixed on the object to be measured (1); the tops of the first rigid arm (2) and the second rigid arm (3) are connected via a first hinge (4); a second hinge (5) is provided in the middle of the first rigid arm (2); a third hinge (6) is provided in the middle of the second rigid arm (3); a fixed base (7) is connected between the second hinge (5) and the third hinge (6); and a sensor body (8) is provided on the fixed base (7).

2. The triangular large-range sensor according to claim 1, characterized in that: The second hinge (5) and the third hinge (6) are located at the same height.

3. The triangular large-range sensor according to claim 1, characterized in that: The end of the first rigid arm (2) is fixed to the surface of the object to be measured (1) via a first fixed end (9), and the end of the second rigid arm (3) is fixed to the surface of the object to be measured (1) via a second fixed end (10).

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