A vibrating wire sensor for a steel structure

Abstract

The utility model provides a kind of vibrating wire sensor of steel structure, including protection pipe, the inside of protection pipe is provided with sleeve pipe, the inside of sleeve pipe is provided with vibrating wire and magnetic coil, the both ends of sleeve pipe are respectively fixedly connected with first end and second end, the end of vibrating wire is respectively fixedly connected on first end and second end, radial hole is all set up on first end and second end, the both sides of protection pipe are fixedly connected with base, the base includes bolt, and bolt passes radial hole.The utility model is provided with protection pipe and sleeve pipe, carry out double-layer protection, pass bolt, first end and second end etc. structure simultaneously, can directly transmit force to vibrating wire.

Description

Technical Field

[0001] This utility model relates to the field of vibrating wire sensor technology, and in particular to a vibrating wire sensor with a steel structure. Background Technology

[0002] A vibrating wire sensor is a sensor based on the principle of resonance, mainly composed of a taut metal wire (steel or aluminum alloy), a fixing block, an electromagnetic coil, and a measuring circuit. The vibrating wire, as the sensing element, has a natural frequency directly related to its tension. When the measured physical quantity (such as pressure or displacement) changes, it alters the tension or length of the vibrating wire, causing a corresponding change in its natural vibration frequency. A periodic excitation signal is applied to the electromagnetic coil, causing the vibrating wire to vibrate and cut magnetic lines of force, inducing a periodic current in the coil. The measuring circuit converts the frequency change into an electrical signal, ultimately calculating the value of the measured physical quantity. It is often used to detect stress changes in stressed components such as steel structures.

[0003] Most vibrating wire sensors fix the two ends of the vibrating wire inside the housing, while the external support and fixing parts clamp and fix the two ends of the housing. When the support and fixing parts and the housing are misaligned, the force on the vibrating wire is lost, which can easily cause inaccurate measurement. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses a vibrating wire sensor with a steel structure, comprising a protective tube, inside which is a sleeve, and inside the sleeve are a vibrating wire and a magnetic coil. The natural frequency of the vibrating wire changes under different tensions, while the magnetic coil is used for detection and other operations to obtain the natural frequency of the vibrating wire, thereby calculating the force on the vibrating wire.

[0005] The sleeve has a first end and a second end fixedly connected to its two ends, respectively. The vibrating wire is also fixedly connected to the first end and the second end, respectively. Radial holes are provided on both ends of the first end and the second end. Bases are fixedly connected to both sides of the protective tube. Each base includes bolts, which pass through the radial holes. The bases are fixed to the area being tested. The bolts passing through the first and second ends allow the force on the area being tested to be directly transmitted to the first and second ends and act on the connected vibrating wire, ensuring measurement accuracy.

[0006] Preferably, the second end is provided with an axial hole, and a screw is provided inside the axial hole. One end of the screw and the end of the first end are both provided with grooves, and a frustum-shaped clamping block is fastened in the groove. The vibrating string passes through the middle of the frustum-shaped clamping block and exits from the conical surface. The vibrating string is fastened and fixed by the frustum-shaped clamping block.

[0007] Preferably, the screw is threaded into an axial hole, and one end of the screw is provided with an internal hexagonal socket. The tension of the vibrating string can be adjusted by rotating the screw within the internal hexagonal socket using a tool.

[0008] Preferably, the second end has an axially formed wiring hole. The cable is threaded through the wiring hole and electrically connected to the internal electronic components of the sleeve.

[0009] Preferably, the base further includes a fixed seat and a clamping member, which cooperate to clamp the protective tube. The bolt passes through the clamping member and is threaded onto the fixed seat. That is, the bolt is fixedly connected to the fixed seat.

[0010] Preferably, one end of the protective tube is fixedly connected to a plug, and a cable is inserted through the middle of the plug. The cable is used for power supply and data transmission.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The system includes components such as a base, bolts, a first end, and a second end. The vibrating string is fixedly connected to the first and second ends. The base is fixed to the area being measured. The bolts allow the force to be applied directly to the vibrating string, improving measurement accuracy.

[0013] 2. It is equipped with protective tubes and sleeves, providing double-layer protection for electronic components such as vibrating wires.

[0014] 3. A screw is provided, with an internal hexagonal socket at one end and a cone-shaped pressure block at the other end to fix the vibrating string. The tension of the vibrating string can be adjusted by adjusting the position of the screw in the axial hole. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 3 This is a three-dimensional schematic diagram of the fixed base of this utility model;

[0018] Figure 4 This is a cross-sectional view of the first end of the present invention;

[0019] Figure 5 This is a cross-sectional view of the second end of the present invention.

[0020] List of reference numerals in the attached diagram:

[0021] 1. Protective tube; 2. Base; 3. Seal; 4. Cable; 5. First end; 6. Sleeve; 7. Second end; 8. Radial hole; 9. Axial hole; 10. Wiring hole; 11. Frustum-shaped pressure block; 12. Vibrating string; 13. Screw; 14. Socket hexagonal slot;

[0022] 21. Fixing base; 22. Bolt; 23. Clamping component. Detailed Implementation

[0023] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0024] like Figures 1 to 5 As shown, a vibrating wire sensor with a steel structure includes a protective tube 1, which is cylindrical in shape. A sleeve 6 is installed inside the protective tube 1, and a vibrating wire 12 and a magnetic coil are installed inside the sleeve 6. When the magnetic coil is energized, it works in conjunction with the vibration of the vibrating wire 12 to obtain relevant electrical signals.

[0025] The two ends of the sleeve 6 are respectively fixedly connected to the first end 5 and the second end 7. It is worth noting that a groove is provided on the edge of the first end 5, and one end of the protective tube 1 is recessed. The recessed structure and the groove are designed for positioning and limiting the first end 5. The ends of the vibrating wire 12 are respectively fixedly connected to the first end 5 and the second end 7. Radial holes 8 are provided on both the first end 5 and the second end 7. The two sides of the protective tube 1 are fixedly connected to the base 2. The base 2 includes bolts 22, and the bolts 22 pass through the radial holes 8. The bolts 22 are fixed on the base 2. That is, the force acting on the base 2 is directly applied to the vibrating wire 12 through the bolts 22, the first end 5 and the second end 7. As a result, the force on the vibrating wire 12 changes, and its natural frequency changes.

[0026] An axial hole 9 is provided on the second end 7. The axial hole 9 is provided through. A screw 13 is provided inside the axial hole 9. A groove is provided at one end of the screw 13 and at the end of the first end 5. A truncated cone pressure block 11 is fastened in the groove. The vibrating string 12 passes through the middle of the truncated cone pressure block 11 and exits from the conical surface. That is, after the truncated cone pressure block 11 is fastened in the groove, the vibrating string 12 is clamped and fixed by the side wall of the truncated cone pressure block 11 and the side wall of the groove.

[0027] The screw 13 is threaded into the axial hole 9. One end of the screw 13 is provided with an internal hexagonal socket 14. A tool is used to engage the internal hexagonal socket 14 and rotate it, thereby controlling the position of the screw 13 in the axial hole 9, that is, controlling the tightness of the vibrating string 12.

[0028] The second end 7 has an axially formed wiring hole 10, through which the cable 4 passes to connect the internal electronic components of the sleeve 6.

[0029] The base 2 also includes a fixed seat 21 and a clamping member 23. Fixed holes are provided on both sides of the fixed seat 21 to facilitate the use of connectors to fix the base 2. Furthermore, if necessary, the base 2 can be fixed to the measurement area by welding. The fixed seat 21 and the clamping member 23 cooperate to clamp the protective tube 1. The bolt 22 passes through the clamping member 23 and is threaded onto the fixed seat 21. That is, the protective tube 1 is fixedly connected to the base 2 by the bolt 22, which facilitates its disassembly and assembly. At the same time, the bolt 22 fixation helps to transfer the force on the base 2 to the vibrating string 12.

[0030] One end of the protective tube 1 is fixedly connected to a plug 3. Waterproof sealant is provided between the plug 3 and the protective tube 1. A cable 4 is inserted through the middle of the plug 3. The cable 4 is used for power supply and data transmission.

[0031] The technical means disclosed in this utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A vibrating wire sensor with a steel structure, characterized in that, It includes a protective tube (1), and a sleeve (6) is provided inside the protective tube (1). A vibrating wire (12) and a magnetic coil are provided inside the sleeve (6). The two ends of the sleeve (6) are fixedly connected to a first end (5) and a second end (7), respectively. The ends of the vibrating string (12) are fixedly connected to the first end (5) and the second end (7), respectively. Radial holes (8) are provided on the first end (5) and the second end (7). Bases (2) are fixedly connected to both sides of the protective tube (1). The base (2) includes bolts (22), and the bolts (22) pass through the radial holes (8).

2. The vibrating wire sensor for a steel structure according to claim 1, characterized in that: The second end (7) is provided with an axial hole (9), and the axial hole (9) has an internal screw (13). One end of the screw (13) and the end of the first end (5) are both provided with grooves, and a frustum pressure block (11) is fastened in the groove. The vibrating string (12) passes through the middle of the frustum pressure block (11) and exits from the conical surface.

3. A vibrating wire sensor for a steel structure according to claim 2, characterized in that: The screw (13) is threaded into the axial hole (9), and one end of the screw (13) is provided with an internal hexagonal groove (14).

4. A vibrating wire sensor for a steel structure according to claim 1, characterized in that: The second end (7) has a wiring hole (10) axially.

5. A vibrating wire sensor for a steel structure according to claim 1, characterized in that: The base (2) also includes a fixed seat (21) and a clamping member (23), which cooperate to clamp the protective tube (1). The bolt (22) passes through the clamping member (23) and is threaded onto the fixed seat (21).

6. A vibrating wire sensor for a steel structure according to claim 1, characterized in that: One end of the protective tube (1) is fixedly connected to a plug (3), and a cable (4) is inserted through the middle of the plug (3).

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