Vibrating wire type displacement meter

Abstract

The utility model belongs to the technical field of measuring equipment, and relates to a vibrating wire type displacement meter which comprises a protective tube, a vibrating wire, a measuring rod, a coil, a cable and a connecting component, the interior of the protective tube is a cavity, the vibrating wire, the measuring rod and the coil are all arranged in the protective tube, and a mounting seat for mounting the vibrating wire is arranged in the inner cavity of the protective tube. One end of the vibrating wire is fixedly connected with the protection tube through the mounting seat; the other end of the vibrating wire is connected with the inner end of the measuring rod, and the measuring rod can move along the axial direction of the protective tube; the outer end of the measuring rod penetrates out of the protection tube; and the connecting component is used for connecting the outer end of the measuring rod with other mounting pieces. The vibrating wire type displacement meter is simple in structure and convenient to use, different anchoring parts can be rapidly connected through the connecting component, the vibrating wire type displacement meter is suitable for different scenes, and the vibrating wire type displacement meter can be used as a single-point settlement meter and can also be used as a surface joint measuring instrument to accurately measure the change amount of cracks and the like.

Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, specifically to a vibrating wire displacement meter. Background Technology

[0002] A vibrating wire displacement gauge is a high-precision displacement measuring instrument based on the vibrating wire principle. It mainly consists of a stainless steel protective tube, a vibrating wire, an excitation electromagnetic coil, a reading device, and a connecting cable. When the measured structure undergoes displacement, the displacement is transmitted to the vibrating wire, causing a change in the wire stress and thus altering its natural vibration frequency. The electromagnetic coil is responsible for exciting the vibrating wire and measuring its vibration frequency. The frequency signal is transmitted to the reading device via the cable, and the precise displacement is calculated using a specific algorithm. Vibrating wire displacement gauges have advantages such as high accuracy, good stability, strong anti-interference capability, and suitability for various harsh environments. Currently, vibrating wire displacement gauges play an important role in civil engineering, water conservancy, transportation, and other engineering fields. They can be used for safety monitoring of structures such as buildings, bridges, and dams, measuring displacement changes of key parts in real time, and providing important data for the safety assessment of the corresponding structures. However, many existing vibrating wire displacement gauges lack versatility and are generally only suitable for applications in specific scenarios. Therefore, this application aims to provide a more versatile vibrating wire displacement gauge. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a vibrating wire displacement meter with a simple structure and strong versatility.

[0004] The technical solution of this utility model is: a vibrating wire displacement gauge, comprising a protective tube, a vibrating wire, a measuring rod, a coil, a cable, and a connecting component. The protective tube has an internal cavity, and the vibrating wire, measuring rod, and coil are all disposed within the protective tube. A mounting seat for mounting the vibrating wire is provided in the inner cavity of the protective tube. One end of the vibrating wire is fixedly connected to the protective tube via the mounting seat; the other end of the vibrating wire is connected to the inner end of the measuring rod, which can move along the axial direction of the protective tube. The coil is disposed near the vibrating wire and is connected to an external instrument via a cable. The outer end of the measuring rod extends out of the protective tube. The connecting component is used to quickly connect the outer end of the measuring rod to other mounting components, including anchors.

[0005] Furthermore, the connecting component includes a shell, which is a cylinder formed by joining two semi-cylinders; the semi-cylinders are provided with cavities, and the two semi-circular bottom surfaces of the semi-cylinders have semi-circular openings. When the two semi-cylinders form the shell, the shell has a cylindrical inner cavity, and both ends are provided with circular openings.

[0006] Furthermore, a disk is provided at the outer end of the measuring rod; the diameter of the disk is larger than the diameter of the measuring rod.

[0007] Furthermore, the inner diameter of the outer shell is not less than the diameter of the disk; the diameter of the circular opening of the outer shell is not less than the diameter of the measuring rod.

[0008] Furthermore, the anchor is in the shape of a long rod, with a connecting disc at the end of the rod. The diameter of the connecting disc is larger than the diameter of the long rod; and the diameter of the long rod is not larger than the diameter of the circular opening on the outer shell; the diameter of the connecting disc is not larger than the inner diameter of the outer shell.

[0009] Furthermore, the semi-cylinders are provided with connecting holes, and the connecting holes on the two semi-cylinders correspond to each other. After being fitted with screws or bolts, the two semi-cylinders are stably formed into a whole shell.

[0010] Furthermore, the connecting component also includes a circular elastic gasket, which is used to install into the inner cavity of the housing and fill the cavity to prevent the anchor or measuring rod from moving axially along the housing.

[0011] Furthermore, a partition can be provided inside the semi-cylinder; the distance between the partition and the bottom surface of the semi-circle is adapted to the thickness of the disk or connecting disk to prevent the disk or connecting disk from moving axially in the outer shell. Of course, the partition can also be better matched with the elastic gasket.

[0012] Furthermore, the anchor can also be a rectangular fixing seat; the rectangular fixing seat is provided with an installation slot that mates with the outer end disc of the measuring rod. The anchor can also be a flexible anchor.

[0013] Furthermore, multiple individual vibrating wire displacement gauges from this application can be mounted on the same base to form a multi-point displacement gauge.

[0014] Furthermore, the disc is provided with mounting holes, through which the measuring rod is directly fixed to the point to be measured.

[0015] The beneficial effects of this utility model are: the vibrating wire displacement meter of this application has a simple structure and is easy to use. Different anchors can be quickly connected through the connecting components, so it is suitable for different scenarios. For example, it can be used as a single-point settlement meter, or as a surface crack measuring instrument to accurately measure the change of cracks. Multiple single-rod displacement meters can also be combined to be used as a multi-point displacement meter. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention;

[0017] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of this utility model;

[0018] Figure 3 This is an exploded view of part of the structure in Embodiment 1 of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting component in Embodiment 1 of this utility model;

[0020] Figure 5 This is a schematic diagram of the multi-point displacement timing in Embodiment 2 of this utility model;

[0021] In the diagram: 1. Protective tube; 2. Vibrating string; 3. Measuring rod; 4. Coil; 5. Cable; 6. Connecting component; 61. Cavity; 62. Connecting hole; 7. Anchor; 8. Elastic component; 9. Mounting base. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art.

[0023] Example 1

[0024] like Figure 1-4 As shown, this embodiment is a vibrating wire displacement gauge, including a protective tube 1, a vibrating wire 2, a measuring rod 3, a coil 4, a cable 5, and a connecting component 6. The protective tube 1 has an internal cavity 61. The vibrating wire 2, the measuring rod 3, and the coil 4 are all disposed within the cavity of the protective tube 1. Two mounting seats 9 for fixing the vibrating wire 2 are provided within the cavity of the protective tube 1. The mounting seat 9 furthest from the measuring rod 3 is fixedly connected to the protective tube 1; the other mounting seat 9 is not fixedly connected to the protective tube 1. Both ends of the vibrating wire 2 are fixed to the mounting seat 9. The mounting seat not fixedly connected to the protective tube 1 is connected to the inner end of the measuring rod 3 through an elastic element 8. The coil 4 is disposed near the vibrating wire 2 and is connected to an external instrument through the cable 5. The outer end of the measuring rod 3 protrudes from the protective tube 1. The connecting component 6 is used to quickly connect the outer end of the measuring rod 3 to other mounting components, including anchors 7.

[0025] In this embodiment, the connecting member 6 includes a shell, which is a cylinder formed by joining two semi-cylinders. Each semi-cylinder has a cavity 61, and each semi-circular bottom surface has a semi-circular opening. When the two semi-cylinders form the shell, the shell has a cylindrical inner cavity, and both ends are provided with circular openings. Connecting holes 62 are provided on the semi-cylinders, and the connecting holes 62 on the two semi-cylinders correspond to each other. By using screws or bolts, the two semi-cylinders are stably connected to form the entire shell.

[0026] In this embodiment, a disk is provided at the outer end of the measuring rod 3; the diameter of the disk is larger than the diameter of the measuring rod 3, and the inner cavity diameter of the outer shell is not smaller than the diameter of the disk; the diameter of the circular opening of the outer shell is not smaller than the diameter of the measuring rod 3.

[0027] In this embodiment, the anchor 7 is a long rod with a connecting disc at the tail end. The diameter of the connecting disc is larger than the diameter of the long rod, and the diameter of the long rod is not larger than the diameter of the circular opening on the outer shell. The diameter of the connecting disc is not larger than the inner diameter of the outer shell.

[0028] In this embodiment, the function of the elastic element 8 is to prevent damage to the vibrating string caused by the twisting of the measuring rod 3 during the installation process.

[0029] In some other embodiments, the connecting member 6 further includes an elastic gasket, which is circular and is used to install into the inner cavity of the housing and fill the inner cavity to prevent the anchor 7 or the measuring rod 3 from moving arbitrarily along the axial direction of the housing. In some embodiments, a partition may also be provided inside the semi-cylinder; the distance between the partition and the bottom surface of the semi-circle is adapted to the thickness of the disk or connecting plate to prevent the disk or connecting plate from moving axially in the housing. Of course, providing a partition also makes it easier to install the elastic gasket.

[0030] Example 2

[0031] like Figure 5 As shown, the difference between this embodiment and embodiment 1 is that this embodiment has multiple vibrating wire displacement gauges with single measuring rods as in embodiment 1 installed on the same base. Each of these includes multiple measuring rods 3, and anchor rods of different lengths are installed on each measuring rod 3 to form a multi-point displacement gauge, which can monitor multiple measurement points simultaneously.

[0032] In other embodiments, the displacement gauge of this application can also be used as a crack gauge. The outer end of the measuring rod 3 is horizontally fixed to one side of the crack by a fixing seat, and the protective tube 1 is horizontally fixed to the other side of the crack by another fixing seat, so that the displacement gauge as a whole is kept horizontal. In this way, when the crack width changes, the measuring rod 3 and the protective tube 1 will undergo relative displacement, and the length of the vibrating wire 2 will change accordingly. By measuring the frequency of the vibrating wire 2, the change of the crack can be calculated.

[0033] In other embodiments, mounting holes can be directly provided on the disc of the measuring rod 3, and the measuring rod 3 can be directly fixed to the point to be measured through the mounting holes. In other embodiments, the anchor 7 can also be a flexible anchor 7, thus adapting to the corresponding scenario.

[0034] The above are only some embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various combinations and modifications of the aforementioned technical features. Any improvements, modifications, equivalent substitutions, or applications of the structure or method of the present utility model to other fields to achieve the same effect without departing from the spirit and scope of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A vibrating wire displacement meter, characterized in that: The device includes a protective tube, a vibrating wire, a measuring rod, a coil, and a cable. The protective tube has an internal cavity, and the vibrating wire, measuring rod, and coil are all housed inside the protective tube. A mounting base for mounting the vibrating wire is provided within the cavity of the protective tube. One end of the vibrating wire is fixedly connected to the protective tube via the mounting base; the other end of the vibrating wire is connected to the inner end of the measuring rod. The coil is located near the vibrating wire and is connected to an external instrument via a cable. The outer end of the measuring rod extends out of the protective tube. The device also includes a connecting component for quickly connecting the outer end of the measuring rod to an anchor.

2. The vibrating wire displacement meter according to claim 1, characterized in that: The connecting component includes an outer shell, which is a cylinder formed by joining two semi-cylinders. Each semi-cylinder has a cavity and a semi-circular opening on its two semi-circular bottom surfaces. When the two semi-cylinders form the outer shell, the outer shell has a cylindrical inner cavity and circular openings at both ends.

3. The vibrating wire displacement meter according to claim 2, characterized in that: The outer end of the measuring rod is provided with a disk; the diameter of the disk is larger than the diameter of the measuring rod.

4. The vibrating wire displacement gauge according to claim 3, characterized in that: The inner diameter of the outer shell is not less than the diameter of the disk; the diameter of the circular opening of the outer shell is not less than the diameter of the measuring rod.

5. The vibrating wire displacement meter according to claim 2, characterized in that: The anchor is in the shape of a long rod, with a connecting disc at the tail end. The diameter of the connecting disc is larger than the diameter of the long rod; the diameter of the long rod is not larger than the diameter of the circular opening on the outer shell; and the diameter of the connecting disc is not larger than the inner diameter of the outer shell.

6. The vibrating wire displacement meter according to claim 2, characterized in that: The semi-cylinders are provided with connecting holes, and the connecting holes on the two semi-cylinders correspond to each other. After being fitted with screws or bolts, the two semi-cylinders are stably formed into a whole shell.

7. The vibrating wire displacement meter according to claim 2, characterized in that: The connecting member also includes an elastic gasket, which is circular and is used to be installed into the inner cavity of the housing to fill the cavity.

8. The vibrating wire displacement meter according to claim 2, characterized in that: The semi-cylinder has a partition inside; the distance between the partition and the bottom surface of the semi-circle is adapted to the thickness of the disk.

9. The vibrating wire displacement meter according to claim 2, characterized in that: Multiple vibrating wire displacement gauges are mounted on the same base to form a multi-point displacement gauge.

10. The vibrating wire displacement meter according to claim 3, characterized in that: The disc is provided with mounting holes, and the measuring rod is directly fixed to the point to be measured through the mounting holes.

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