Bridge strain monitoring sensing mechanism

Abstract

The utility model relates to a bridge strain monitoring sensing mechanism, which comprises a vibrating wire strain gauge, the bottom of the vibrating wire strain gauge is fixedly connected with a supporting table, the bottom of the supporting table is fixedly connected with two groups of positioning blocks, the bottom of each group of positioning blocks is provided with a group of connecting seats, the connecting seats are provided with slots, and the slots are connected with the vibrating wire strain gauge. And the positioning blocks extend into the inserting grooves located below the positioning blocks and are fixedly connected with the connecting bases, the opposite sides of the two sets of connecting bases are fixedly connected with abutting bases, and a set of retaining bases is arranged above each set of abutting bases. According to the utility model, the vibrating wire strain gauge can be in contact with the bridge under the supporting of the supporting table by utilizing the action of the retaining seat and the abutting seat on the guide frame, so that the vibrating wire strain gauge can be fixed at the bottom of the bridge without screws or adhesives when the device is installed and used; and the influence of screw corrosion or adhesive viscosity reduction on the contact monitoring of the vibrating wire strain gauge and the bottom of the bridge is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a bridge strain monitoring sensor mechanism. Background Art

[0002] my country has made great achievements in the construction of long-span bridges in recent years, among which bridge construction monitoring has played an important technical support role. The widely used construction strain monitoring data based on vibrating wire strain sensors is particularly important.

[0003] Currently, most bridges are monitored for strain using sensor technology. The most widely used method is to glue or screw strain gauges to the bottom of the bridge. However, due to factors such as reduced adhesive viscosity or rust on the screws, the strain gauges are prone to falling off from the bottom of the bridge. In addition, if the strain gauge becomes loose and separates after being installed at the bottom of the bridge, it will interfere with the strain gauge's detection results, causing large deviations in the data obtained by the user. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a bridge strain monitoring sensing mechanism.

[0006] (2) Technical solution

[0007] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structures between the two interlocking structures are connected with each other for a period of time, and the interlocking structures are connected with each other for a period of time.

[0008] Preferably, a wire slot is provided in the middle of the vibrating wire strain gauge, and the connecting cable of the vibrating wire strain gauge passes through the wire slot, thereby facilitating the connection and use of the connecting cable of the vibrating wire strain gauge through the wire slot.

[0009] It is further preferred that the force retaining assembly includes an extension rod fixedly connected to the rear side of each group of retaining seats, each group of extension rods is rotatably connected to a group of force rods, each group of force rods has a group of connecting columns inserted at the top end, and the connecting columns are rotatably connected to the force rods on their outside, and a group of load blocks are provided on the rear side of the two groups of connecting columns, and the load blocks are respectively fixedly connected to the two groups of connecting columns, so that the drive adjustment of the retaining seat and the abutment seat can be maintained under the downward trend of the load blocks.

[0010] It is further preferred that the force-applying and maintaining assembly also includes two groups of positioning rods that pass through the load block and are slidably connected thereto, the bottom ends of the positioning rods are fixedly connected to a base, and the base is provided with several groups of fixing holes, so that the load block can move longitudinally and maintain smooth adjustment.

[0011] It is further preferred that the force-applying retaining assembly also includes a positioning rod passing through the load block and being rotatably connected thereto, a conduit is provided at the bottom end of the positioning rod, and the conduit is slidably connected to the positioning rod, the bottom end of the conduit is fixedly connected to a base, and a plurality of fixing holes are provided on the base, so that the load block can be deflected and moved, so that the vibrating wire strain gauge can still maintain contact with the bottom of the bridge when the guide frame is tilted.

[0012] (3) Beneficial effects

[0013] Compared with the existing technology, the present invention provides a bridge strain monitoring sensor mechanism with the following beneficial effects:

[0014] 1. In the present invention, the vibrating-wire strain gauge can be brought into contact with the bridge by utilizing the movement of the retaining seat and the abutting seat on the guide frame under the support of the support platform, thereby eliminating the need to use screws or adhesives to fix the vibrating-wire strain gauge to the bottom of the bridge during installation and use, and avoiding the influence of screw corrosion or reduced adhesive viscosity on the contact monitoring between the vibrating-wire strain gauge and the bottom of the bridge.

[0015] 2. In the present invention, a force-applying contact assembly is provided and the downward tendency of the load block is utilized to maintain the contact between the vibrating-wire strain gauge and the bridge, thereby enabling the vibrating-wire strain gauge to stably monitor the strain changes of the bridge and avoiding interference with the monitoring caused by loosening of the vibrating-wire strain gauge fixed to the bottom of the bridge.

[0016] 3. In the present invention, a wire groove is provided on the support platform to cooperate with the connecting cable of the vibrating wire strain gauge, so that the vibrating wire strain gauge can avoid being squeezed after being supported and installed on the support platform, and the connecting cable of the vibrating wire strain gauge can be easily led out for connection and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of the first embodiment of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of the second embodiment of the present utility model;

[0019] Figure 3 This is a structural diagram of the utility model in which the force-applying and holding components are omitted;

[0020] Figure 4 This is a schematic diagram of the guide frame and its connection structure of the utility model;

[0021] Figure 5 This is a structural diagram of the support platform of the utility model;

[0022] Figure 6 This is a structural diagram of the load block in the third embodiment of the present utility model.

[0023] In the figure: 1. Vibrating wire strain gauge; 2. Support platform; 3. Positioning block; 4. Connecting seat; 5. Slot; 6. Abutment seat; 7. Retaining seat; 8. Guide frame; 9. Protruding rod; 10. Connecting rod; 11. Wire groove; 12. Extension rod; 13. Force rod; 14. Connecting column; 15. Load block; 16. Positioning rod; 17. Base; 18. Fixing hole; 19. Conduit. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1:

[0026] See also Figure 3-5A bridge strain monitoring sensor mechanism includes a vibrating wire strain gauge 1. A metal steel wire is provided inside the vibrating wire strain gauge 1 and fixed at both ends. A metal tube is provided outside for support and protection. An excitation coil and a temperature measuring resistor are provided in the middle of the metal tube. The coil is excited by a pulse voltage signal, and a changing magnetic field is generated in the coil. The steel wire generates attenuated vibration under the action of the magnetic field. The vibration frequency is the natural frequency of the steel wire. Therefore, it can be known that the natural frequency of the steel wire is related to its length and internal tension. The vibrating wire strain gauge is installed in a hole reserved in the bridge, or is installed and fixed by other means. In the prior art, there is no limitation on this, and the relevant installation method can be selected according to the actual situation. When the vibrating wire strain gauge 1 is installed at the bottom of the bridge and the two ends of the vibrating wire strain gauge 1 are compressed, its internal tension will change, thereby causing the natural frequency of the steel wire to change. By changing the natural frequency of the steel wire, the change in the strain of the bridge can be conveniently measured. The bottom of the vibrating wire strain gauge 1 is fixedly connected to a support 2, and the bottom of the support 2 is fixedly connected to two groups of positioning blocks 3. The bottom of each group of positioning blocks 3 is provided with a group of connecting seats 4, and a slot 5 is opened on the connecting seat 4, and the positioning block 3 extends into the slot 5 located below it. And it is fixedly connected to the connecting seat 4, the opposite sides of the two groups of connecting seats 4 are fixedly connected with abutment seats 6, and a group of retaining seats 7 are set above each group of abutment seats 6. A guide frame 8 is inserted in the middle of the abutment seat 6, and the abutment seat 6 and the retaining seat 7 are slidably connected with the guide frame 8. The front sides of the abutment seat 6 and the retaining seat 7 are fixedly connected with a protruding rod 9. A group of connecting rods 10 is set between the two adjacent groups of protruding rods 9. The two ends of the connecting rod 10 are respectively rotatably connected with the adjacent protruding rods 9. When using the bridge strain monitoring sensor mechanism, the user places the steel pipe between the guide frame 8 and the bottom of the bridge in advance, and makes the two ends of the steel pipe connected to the two respectively. Touch, and then use screws to pass through the guide frame 8 and the steel pipe and connect and fix it to the bridge. At this time, the vibrating string strain gauge 1 should maintain contact with the bottom of the bridge. When the retaining seat 7 slides along the guide frame 8 back to the abutment seat 6, the protruding rod 9 on the front side of the guide frame 8 can pull the connecting rod 10, and make the connecting rod 10 deflect while moving, and make the connecting rod 10 pull the protruding rod 9 on the front side of the abutment seat 6, so that the abutment seat 6 slides upward along the guide frame 8, and then adjusts and changes the height position of the vibrating string strain gauge 1, so that the vibrating string strain gauge 1 can be adjusted to maintain contact with the bottom of the bridge. A force retaining component is provided above the two groups of retaining seats 7.

[0027] In this embodiment, a wire groove 11 is provided in the middle of the vibrating wire strain gauge 1 and passes through the wire groove 11. The connecting cable of the vibrating wire strain gauge 1 passes through the wire groove 11. After the vibrating wire strain gauge 1 is supported and installed on the support 2, it can avoid squeezing of its connecting cable and can lead out the connecting cable of the vibrating wire strain gauge 1 for connection and use.

[0028] In this embodiment, the force holding assembly includes an extension rod 12 fixedly connected to the rear side of each holding seat 7, and each extension rod 12 is rotatably connected to a group of force rods 13, and each group of force rods 13 is inserted at the top of a group of connecting columns 14, and the connecting columns 14 are rotatably connected to the force rods 13 located on the outside thereof. A group of load blocks 15 are provided on the rear sides of the two groups of connecting columns 14, and the load blocks 15 are respectively fixedly connected to the two groups of connecting columns 14. By using the setting and use of the auxiliary force assembly, the load blocks 15 can have a tendency to move downward under the influence of their own gravity, and if the load blocks 15 move downward, they can use the connecting columns 14 to push the force rods 13, and make the force rods 13 drive the extension rods 12 and the holding seat 7 to slide along the guide frame 8 back to the abutment seat 6, so that the load block 15, under its own falling tendency and the coordinated action of the holding seat 7 and the abutment seat 6, keeps the vibrating wire strain gauge 1 in contact with the bottom of the bridge.

[0029] Example 2:

[0030] See also Figure 1-2 On the basis of Example 1, the force-applying and holding assembly further includes two groups of positioning rods 16 that penetrate the load block 15 and are slidably connected thereto. The bottom ends of the positioning rods 16 are fixedly connected to a base 17. The base 17 is provided with a plurality of fixing holes 18. The user can use screws to pass through the fixing holes 18 to fix the base 17 on the bridge for use. At this time, the load block 15 can have a tendency to move longitudinally downward under the guidance of the positioning rods 16, and the load block 15 can remain stable.

[0031] Example 3:

[0032] See also Figure 6 On the basis of Example 1, the force holding assembly also includes a positioning rod 16 that passes through the load block 15 and is rotatably connected thereto. A guide tube 19 is provided at the bottom end of the positioning rod 16, and the guide tube 19 is slidably connected to the positioning rod 16. The bottom end of the guide tube 19 is fixedly connected to a base 17. A plurality of fixing holes 18 are provided on the base 17. The user can use screws to pass through the fixing holes 18 to fix the base 17 on the bridge for use. At this time, the load block 15 can have a tendency to move longitudinally downward by utilizing the cooperation of the positioning rod 16 and the guide tube 19, and the load block 15 can have a tendency to deflect at the positioning rod 16, so that when the guide frame 8 loosens and tilts at the bottom of the bridge, the load block 15 can be deflected, and the force contact assembly drives a group of abutment seats 6 to maintain upward force, so that the vibrating wire strain gauge 1 maintains contact with the bottom of the bridge.

[0033] In all the schemes mentioned above, the connection between the two components can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be listed here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bridge strain monitoring sensor mechanism, comprising a vibrating wire strain gauge (1), characterized in that: The bottom of the vibrating-wire strain gauge (1) is fixedly connected to a support platform (2), and the bottom of the support platform (2) is fixedly connected to two groups of positioning blocks (3), and a group of connecting seats (4) is provided at the bottom of each group of positioning blocks (3), and a slot (5) is provided on the connecting seat (4), and the positioning block (3) extends into the slot (5) located below it and is fixedly connected to the connecting seat (4), and the opposite sides of the two groups of connecting seats (4) are fixedly connected to abutment seats (6), and each group of abutment seats (6) is provided above A group of retaining seats (7) is arranged, a guide frame (8) is inserted in the middle of the abutting seat (6), the abutting seat (6) and the retaining seat (7) are both slidably connected to the guide frame (8), the front sides of the abutting seat (6) and the retaining seat (7) are both fixedly connected to convex rods (9), a group of connecting rods (10) is arranged between two adjacent groups of the convex rods (9), the two ends of the connecting rods (10) are respectively rotatably connected to the adjacent convex rods (9), and a force-applying retaining assembly is arranged above the two groups of retaining seats (7).

2. A bridge strain monitoring sensor mechanism according to claim 1, characterized in that: A wire slot (11) is provided in the middle of the vibrating-wire strain gauge (1) and passes through the vibrating-wire strain gauge, and a connecting cable of the vibrating-wire strain gauge (1) passes through the wire slot (11).

3. The bridge strain monitoring sensor mechanism according to claim 1 is characterized in that: The force-applying and holding assembly comprises an extension rod (12) fixedly connected to the rear side of each group of holding seats (7); each group of the extension rods (12) is rotatably connected to a group of force-applying rods (13); a group of connecting columns (14) are inserted at the top end of each group of the force-applying rods (13); and the connecting columns (14) are rotatably connected to the force-applying rods (13) located outside thereof; a group of load blocks (15) are arranged at the rear sides of the two groups of the connecting columns (14); and the load blocks (15) are respectively fixedly connected to the two groups of the connecting columns (14).

4. A bridge strain monitoring sensor mechanism according to claim 3, characterized in that: The force-applying and holding assembly further comprises two groups of positioning rods (16) penetrating the load block (15) and slidably connected thereto, the bottom ends of the positioning rods (16) being fixedly connected to a base (17), and the base (17) being provided with a plurality of groups of fixing holes (18).

5. The bridge strain monitoring sensor mechanism according to claim 3 is characterized in that: The force-applying and holding assembly further comprises a positioning rod (16) penetrating the load block (15) and being rotatably connected thereto; a guide tube (19) is provided at the bottom end of the positioning rod (16), and the guide tube (19) is slidably connected to the positioning rod (16); a base (17) is fixedly connected at the bottom end of the guide tube (19); and a plurality of fixing holes (18) are provided on the base (17).

Images