A verification fixture for a bridge displacement monitoring apparatus

Abstract

The utility model relates to bridge monitoring instrument technical field especially relates to a kind of checking fixture for bridge displacement monitoring equipment, including the positioning structure for being fixed in bridge monitoring position;Positioning structure is provided with: bearing platform, for bearing bridge displacement monitoring equipment;Displacement indicating element;Displacement adjusting mechanism;Wherein, the bearing platform is displaceably arranged on the positioning structure;The displacement adjusting mechanism controls the displacement amount of the bearing platform relative to the positioning structure;The displacement indicating element indicates the displacement amount of the bearing platform relative to the positioning structure, to be used for the displacement measurement data of checking bridge displacement monitoring equipment.The utility model relates to a kind of checking fixture for bridge displacement monitoring equipment for checking the measurement accuracy of bridge displacement monitoring equipment quickly and accurately in bridge field, to guarantee the reliability of bridge monitoring data, and then improve the level of bridge structure safety management.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge monitoring instrument technical field especially relates to a kind of checking fixture for bridge displacement monitoring equipment. BACKGROUND

[0002] With the rapid development of modern transportation infrastructure construction, bridges as the key nodes in the transportation network, its safety and durability are increasingly valued. Bridge in the long-term operation process, inevitably be affected by vehicle load, environmental factors (such as temperature change, wind, earthquake, etc.) and material aging and multiple factors, resulting in deformation and displacement of bridge structure and component. In order to protect the safe operation of bridge, timely grasp the structure health state of bridge, therefore bridge health monitoring technology emerges as the times require, and become the important component in modern bridge engineering field.

[0003] Displacement monitoring is one of the core links in bridge health monitoring system. By installing various types of displacement sensors or monitoring equipment at the key parts of bridge (such as main girder, pier, bridge deck, etc.), the deflection, settlement, horizontal displacement and other key parameters of bridge can be collected in real time and continuously, which provides important data support for the safety evaluation, performance degradation analysis and maintenance decision of bridge structure. At present, commonly used bridge displacement monitoring equipment includes but is not limited to: total station, GNSS receiver, laser displacement sensor, tiltmeter, deflection meter, extensometer, etc. These devices play a crucial role in bridge health monitoring.

[0004] However, bridge displacement monitoring equipment in the long-term operation process, due to the influence of environmental factors, equipment itself aging, electrical performance drift and other factors, its measurement accuracy may gradually decrease, even appear data distortion or numerical drift and other problems. If these monitoring equipment are not checked and calibrated regularly, it is difficult to guarantee the accuracy and reliability of monitoring data, which may lead to misjudgment of bridge structure state, even cause safety hazard. Therefore, regular precision checking and calibration of bridge displacement monitoring equipment is the key link to ensure the effective operation of bridge health monitoring system, and is also an important measure to ensure the safe operation of bridge.

[0005] In the prior art, the checking and calibration of bridge displacement monitoring equipment usually relies on manual field operation. The traditional checking method mainly adopts the following ways:

[0006] One, artificial comparison method: in the bridge site, using traditional measuring tools such as level, theodolite, steel tape, etc. Artificially measure the displacement of the bridge structure, and then compare the artificial measurement value with the reading of the bridge displacement monitoring equipment, so as to judge the accuracy of the monitoring equipment. This method is complicated, low efficiency, and the accuracy of artificial measurement is greatly affected by the skill level of the operator and environmental factors, which is difficult to ensure the accuracy and reliability of the verification results.

[0007] Two, temporary calibration device: in some cases, in order to improve the accuracy of verification, some simple calibration devices may be temporarily set up on site, such as using jack or manual displacement platform, etc. Artificially apply a known displacement to the monitoring equipment, and then observe whether the reading of the monitoring equipment is consistent with the applied displacement. However, these temporary calibration devices are simple in structure, poor in stability, limited in displacement control accuracy, and complex in construction and operation process, which is difficult to realize fast and efficient on-site verification.

[0008] Three, laboratory calibration: for some high-precision bridge displacement monitoring equipment, it may be disassembled regularly and sent to a professional measurement laboratory for calibration. Although this method can obtain higher calibration accuracy, it is complicated to operate and time-consuming, and during the equipment inspection period, the bridge displacement monitoring work will be interrupted, which is not conducive to the continuous monitoring of the bridge. In addition, frequent disassembly and installation of monitoring equipment may have adverse effects on its performance and service life.

[0009] In summary, the existing bridge displacement monitoring equipment verification method has many shortcomings such as high labor cost, low efficiency, difficult to guarantee accuracy, lack of special tools, etc. Especially in the bridge site environment, there is an urgent need for a special verification tool with simple structure, convenient operation, reliable accuracy and easy reuse to overcome the defects of the existing technology, improve the efficiency and quality of bridge displacement monitoring equipment verification, and better protect the safe operation of the bridge. Practical new type content

[0010] In order to solve the technical problems existing in the prior art to some extent, the utility model provides a kind of verification fixture for bridge displacement monitoring equipment, it has the advantages of simple structure and convenient operation, for the measurement accuracy of bridge displacement monitoring equipment is quickly and accurately verified in bridge site, to guarantee the reliability of bridge monitoring data, and then help to improve the level of bridge structure safety management.

[0011] The utility model relates to a kind of checking fixture for bridge displacement monitoring equipment, including the positioning structure for being fixed in bridge monitoring position;Positioning structure is provided with: bearing platform, for bearing bridge displacement monitoring equipment;Displacement indicating element;Displacement adjusting mechanism;Wherein, the bearing platform is displaceably arranged on the positioning structure;The displacement adjusting mechanism controls the displacement amount of the bearing platform relative to the positioning structure;The displacement indicating element indicates the displacement amount of the bearing platform relative to the positioning structure, to be used for checking the displacement measurement data of bridge displacement monitoring equipment.

[0012] According to the utility model relates to a kind of checking fixture for bridge displacement monitoring equipment, the positioning structure includes: fixture assembly, for being fixed in bridge monitoring position;Locking assembly, detachably arranged on the fixture assembly;Wherein, by the fixture assembly clamping fixed piece on bridge monitoring position, and by the locking assembly locking the fixture assembly, to make the fixture assembly keep clamping fixed piece on bridge monitoring position.

[0013] According to the utility model relates to a kind of checking fixture for bridge displacement monitoring equipment, the fixture assembly includes: first clamping body;Second clamping body, for being clamped with the first clamping body fixed piece on bridge monitoring position together;Wherein, the first clamping body and the second clamping body one side is mutually hinged by a hinge shaft, and the first clamping body and the second clamping body are mutually rotated around the hinge shaft and open and close;The locking assembly is detachably locked in the first clamping body and the second clamping body at the clamping opening between the first clamping body and the second clamping body.

[0014] According to the utility model relates to a kind of checking fixture for bridge displacement monitoring equipment, the first clamping body and the second clamping body are integrally formed with first connecting plate and second connecting plate respectively on the side away from the hinge shaft;The locking assembly includes at least one connecting screw;Wherein, the first connecting plate and the second connecting plate are mutually superimposed in the mutually closed state of the first clamping body and the second clamping body, and the connecting screw is penetrated and is commonly locked the first connecting plate and the second connecting plate.

[0015] According to the utility model relates to a kind of checking fixture for bridge displacement monitoring equipment, the first clamping body and the second clamping body one side are integrally formed with first limiting block and second limiting block respectively;The clamping opening between the first clamping body and the second clamping body is distributed on the opposite sides of the hinge shaft with the first limiting block, second limiting block;Wherein, the first limiting block and the second limiting block are mutually separated and mutually present certain angle and the angle is consistent with the opening angle between the first clamping body and the second clamping body in the mutually closed state of the first clamping body and the second clamping body;The first limiting block and the second limiting block are mutually rotated and close in the process that the first clamping body and the second clamping body are rotated from mutually closed state and switched to mutually open state.

[0016] According to the utility model discloses a kind of checking fixture for bridge displacement monitoring equipment, the clamp assembly further includes: at least one locking screw, screw connection is in the first clamping body or second clamping body and is inserted to the clamping space between the first clamping body and second clamping body, for the fixed piece on bridge monitoring position is tightened;Rubber layer is surrounded in the clamping space between the first clamping body and second clamping body, and the rubber layer is attached to the inner wall of the first clamping body and second clamping body.

[0017] According to the utility model discloses a kind of checking fixture for bridge displacement monitoring equipment, the bearing platform includes: bearing plate, for cooperating with the bottom plane of bridge displacement monitoring equipment;Chute, open in the surface of the bearing plate;Two fixed clamps, for from opposite sides jointly clamping bridge displacement monitoring equipment on the bearing plate, two The fixed clamp is open and close to be arranged on the bearing plate and is respectively slidably fitted in the chute;Wherein, one side of the bearing plate is provided with locking knob, and the locking knob is loosely locked in the fixed clamp.

[0018] According to the utility model discloses a kind of checking fixture for bridge displacement monitoring equipment, two The fixed clamp is symmetrically distributed on the bearing plate and respectively includes pressing plate and barbed plate;The pressing plate is slidably fitted in the chute, and the barbed plate is arranged on the pressing plate and is away from one end of the bearing plate and perpendicular to the pressing plate;

[0019] Wherein, when two The fixed clamp is mutually close, bridge displacement monitoring equipment is jointly clamped by the pressing plate respectively, and bridge displacement monitoring equipment is jointly buckled by the barbed plate respectively.

[0020] According to the utility model discloses a kind of checking fixture for bridge displacement monitoring equipment, the displacement indicating element includes scale;Vertical extension / transverse extension is opened in the positioning structure The socket;The scale is slidably embedded in the socket;One end of the scale is fixedly connected to the bearing plate and can be synchronously displaced with the bearing plate;

[0021] The displacement adjusting mechanism includes adjusting knob, and the adjusting knob is rotatably arranged on the positioning structure and is drivingly connected to the scale to adjust the displacement of the scale.

[0022] According to the utility model discloses a kind of checking fixture for bridge displacement monitoring equipment, the displacement adjusting mechanism further includes driving wheel, and the adjusting knob is drivingly connected to the driving wheel, to drive the driving wheel rotation;The scale is drivenly connected to the driving wheel to drive the scale to produce displacement by the driving wheel.

[0023] The utility model discloses a kind of checking fixtures for bridge displacement monitoring equipment, the driving wheel is friction wheel and one side is connected with the side friction of scale, the driving wheel friction drive scale generates displacement.

[0024] The utility model discloses a kind of checking fixtures for bridge displacement monitoring equipment, the driving wheel is gear and one side is engaged with the rack on scale, the driving wheel engagement drive scale generates displacement.

[0025] The utility model discloses a kind of checking fixtures for bridge displacement monitoring equipment, its core composition includes a positioning structure, the positioning structure is to be fixed stably in the specific monitoring position of bridge.In positioning structure, three key functional components are set: bearing platform, displacement indicating element and displacement adjusting mechanism.Between them, bearing platform is used to place and support the bridge displacement monitoring equipment to be checked;Bearing platform is designed to be displaced relative to positioning structure;The function of displacement adjusting mechanism is accurately controlled and adjusted the displacement amount of bearing platform relative to positioning structure;And displacement indicating element is used to indicate the specific displacement amount of bearing platform relative to positioning structure in real time, accurately.The accurate displacement reference value provided by displacement indicating element can be compared with the displacement data measured by bridge displacement monitoring equipment itself, to realize the effective checking of the measurement accuracy of bridge displacement monitoring equipment.The positioning structure is the basis and support of entire checking fixture, it needs to have enough strength and rigidity, to ensure the stability and reliability of fixture in checking process.Bearing platform is "displacedly set on the positioning structure", that is, there is the degree of freedom of relative motion between bearing platform and positioning structure, and this degree of freedom is the basis for realizing displacement simulation and checking.Displacement adjusting mechanism is the key to realize the accurate displacement control of bearing platform, and displacement adjusting mechanism is mechanically connected with bearing platform, can lock and / or drive the displacement position of bearing platform relative to positioning structure.The function of displacement indicating element is "indicating the displacement amount of bearing platform relative to positioning structure", which means that displacement indicating element needs to be able to measure or reflect the relative position change of bearing platform relative to positioning structure.

[0026] In use, first, the positioning structure is fixed on the monitoring position of the bridge through clamping, bolt connection or other reliable ways, ensuring that the positioning structure does not move or shake during the verification process. Then, the bridge displacement monitoring equipment to be verified is placed on the bearing platform. Before starting the displacement simulation, it is usually necessary to perform initial zero setting or reading recording on the displacement indicating element and the bridge displacement monitoring equipment, serving as a reference benchmark for subsequent displacement changes. Then, the displacement adjusting mechanism is operated to adjust the bearing platform to have a preset displacement amount relative to the positioning structure. In this process, the displacement indicating element indicates the actual displacement amount of the bearing platform in real time, and the displacement data measured by the bridge displacement monitoring equipment is recorded. Finally, the accurate displacement amount indicated by the displacement indicating element is taken as a reference true value, and is compared with the displacement data measured by the bridge displacement monitoring equipment, so that the deviation therebetween is calculated, thereby evaluating the measurement accuracy and reliability of the bridge displacement monitoring equipment. And the verification can be repeated at different bearing platform displacement amounts as needed, so that the performance of the bridge displacement monitoring equipment can be evaluated more comprehensively.

[0027] In summary, the beneficial technical effects of the utility model lie in that: the bridge monitoring position can be quickly fixed, accurate displacement simulation can be realized through the displacement adjusting mechanism, the operation process is simplified, manual operation links are reduced, the displacement verification efficiency is significantly improved, the manual cost is reduced, the displacement amount of the bearing platform is directly indicated through the displacement indicating element, a high-precision displacement reference benchmark is provided for the verification of the bridge displacement monitoring equipment, the measurement accuracy of the equipment can be accurately evaluated through direct comparison with the measurement data of the monitoring equipment, the monitoring equipment with reduced or drifted accuracy can be effectively identified and excluded, thereby ensuring the reliability of the bridge displacement monitoring data, the on-site operation convenience is considered, the installation of the clamp, the placement of the equipment and the adjustment of the displacement can be completed through simple operation, therefore, the utility model has the advantages of simple structure and convenient operation, the measurement accuracy of the bridge displacement monitoring equipment can be quickly and accurately verified on the bridge site, the reliability of the bridge monitoring data is ensured, and the level of bridge safety management is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0029] Fig. 1 It is the overall structure diagram of the utility model;

[0030] Fig. 2 It is the overall structure diagram of the utility model;

[0031] Fig. 3 is a local structure diagram of the utility model;

[0032] Fig. 4 is a internal transmission structure diagram of the utility model.

[0033] Reference signs:

[0034] 100, positioning structure, 101, bearing platform, 102, displacement indicating element, 103, displacement adjusting mechanism;

[0035] 1, first clamping body, 2, second clamping body, 3, hinged shaft, 4, first connecting plate, 5, second connecting plate, 6, connecting screw, 7, first limit block, 8, second limit block, 9, locking screw, 10, rubber layer, 11, bearing plate, 12, sliding groove, 13, fixed clamp, 131, pressing plate, 132, barbed plate, 14, locking knob, 15, scale, 16, bayonet, 17, adjusting knob, 18, driving wheel. DETAILED DESCRIPTION

[0036] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model. In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as the limitation of the utility model.

[0037] Embodiment one

[0038] As Figs. 1 to 4As shown, the checking fixture for the bridge displacement monitoring device of the embodiment comprises a positioning structure 100 for being fixed at a bridge monitoring position, and a bearing platform 101, a displacement indicating element 102 and a displacement adjusting mechanism 103 are installed on the positioning structure 100, the bearing platform 101 is used for bearing the bridge displacement monitoring device. The bearing platform 101 is movably installed on the positioning structure 100, the displacement adjusting mechanism 103 controls the displacement amount of the bearing platform 101 relative to the positioning structure 100; the displacement indicating element 102 indicates the displacement amount of the bearing platform 101 relative to the positioning structure 100, so as to check the displacement measurement data of the bridge displacement monitoring device according to the displacement amount of the displacement indicating element 102.

[0039] It can be understood that the core structure of the embodiment includes a positioning structure 100, which is used to fix it stably on a specific monitoring position of the bridge. Above the positioning structure 100, three key functional components are arranged: a bearing platform 101, a displacement indicating element 102 and a displacement adjusting mechanism 103. Among them, the bearing platform 101 is used to place and support the bridge displacement monitoring equipment to be checked; the bearing platform 101 is designed to be movable relative to the positioning structure 100; the function of the displacement adjusting mechanism 103 is to accurately control and adjust the displacement amount of the bearing platform 101 relative to the positioning structure 100; and the displacement indicating element 102 is used to indicate the specific displacement amount of the bearing platform 101 relative to the positioning structure 100 in real time and accurately. Through the accurate displacement reference value provided by the displacement indicating element 102, the displacement data measured by the bridge displacement monitoring equipment itself can be compared, so as to realize the effective checking of the measurement accuracy of the bridge displacement monitoring equipment. The positioning structure 100 is the basis and support of the whole checking fixture, which needs to have enough strength and rigidity to ensure the stability and reliability of the fixture during the checking process. The bearing platform 101 is "movably arranged on the positioning structure 100", that is, there is a relative motion degree between the bearing platform 101 and the positioning structure 100, which is the basis for realizing displacement simulation and checking. The displacement adjusting mechanism 103 is the key to realize the accurate displacement control of the bearing platform 101, and the displacement adjusting mechanism 103 is mechanically connected with the bearing platform 101 and can lock and / or drive the displacement position of the bearing platform 101 relative to the positioning structure 100. The function of the displacement indicating element 102 is to "indicate the displacement amount of the bearing platform 101 relative to the positioning structure 100", which means that the displacement indicating element 102 needs to be able to measure or reflect the relative position change of the bearing platform 101 relative to the positioning structure 100. In the use process, first, the positioning structure 100 is fixed on the monitoring position of the bridge through clamping, bolt connection or other reliable ways, to ensure that the positioning structure 100 does not move or shake during the checking process. Then, the bridge displacement monitoring equipment to be checked is placed on the bearing platform 101. Before starting the displacement simulation, it is usually necessary to perform initial zero setting or reading recording on the displacement indicating element 102 and the bridge displacement monitoring equipment, as a reference benchmark for subsequent displacement change. Then, the displacement adjusting mechanism 103 is operated to adjust the bearing platform 101 to have a preset displacement amount relative to the positioning structure 100. In this process, the displacement indicating element 102 indicates the actual displacement amount of the bearing platform 101 in real time, and records the displacement data measured by the bridge displacement monitoring equipment itself. Finally, the accurate displacement amount indicated by the displacement indicating element 102 is taken as a reference true value, which is compared with the displacement data measured by the bridge displacement monitoring equipment for analysis, and the deviation between them is calculated, so as to evaluate the measurement accuracy and reliability of the bridge displacement monitoring equipment.And also can be repeated according to the need, under the displacement of different bearing platform 101, check, carry out multiple verification, to more comprehensive evaluation bridge displacement monitoring equipment performance.

[0040] In summary, the beneficial technical effects of the utility model lie in: can be fixed in bridge monitoring position quickly, and realize accurate displacement simulation through displacement adjusting mechanism 103, simplify the operation process, reduce manual operation link, thereby significantly improve the verification efficiency, reduce the labor cost, and adopt displacement indicating element 102 direct indication bearing platform 101's displacement, for the verification of bridge displacement monitoring equipment provides high-precision displacement reference datum, still through with the direct comparison of monitoring equipment measurement data, can accurately evaluate the measurement accuracy of equipment, effectively identify and exclude the monitoring equipment of precision decline or drift, thereby guarantee the reliability of bridge displacement monitoring data, also consider the convenience of field operation, through simple operation can complete the installation of fixture, the placement of equipment and the adjustment of displacement, therefore possess simple structure, convenient operation's advantage, can quickly, accurately verify the measurement accuracy of bridge displacement monitoring equipment in bridge field, guarantee the reliability of bridge monitoring data, and then help to improve the level of bridge safety management.

[0041] In one embodiment, further, the positioning structure 100 includes a clamp assembly and a locking assembly, when installed, the clamp assembly is fixed at the monitoring position of the bridge, and the locking assembly is detachably arranged on the clamp assembly, the clamp assembly clamps the fixing member on the monitoring position of the bridge, and the locking assembly locks the clamp assembly, so that the clamp assembly keeps clamping the fixing member on the monitoring position of the bridge. It can be understood that in this embodiment, the "clamp assembly + locking assembly" is used to reliably clamp the fixing member at the monitoring position of the bridge. In short, the clamp assembly is responsible for enclosing and fixing a certain fixed part on the bridge that can be clamped or supported, and the locking assembly is responsible for finally locking through screwing or other locking methods after the clamp assembly is preliminarily clamped. When installed, the clamp assembly is opened or aligned with the fixing member at the monitoring position of the bridge, and is preliminarily enclosed. After the clamp assembly clamps the fixing member to a certain extent, the operator completes the final locking through the locking assembly (such as a screw, bolt or pin structure, etc.). In this way, the positioning structure 100 can be stably fixed on the bridge, thereby creating conditions for the subsequent installation and displacement adjustment of the bearing platform 101. In use, the clamp assembly can quickly adapt to different shapes or sizes of the fixed part on the bridge, and effectively locked through the locking assembly, improving the versatility of the overall installation of the verification clamp. And the setting of the locking assembly enables the clamp assembly to maintain a stable and reliable clamping state even in a vibrating, load fluctuating environment.

[0042] In one embodiment, specifically, the clamp assembly comprises a first clamp body 1 and a second clamp body 2, which, when installed, jointly clamp the fixing member at the bridge monitoring position, the first clamp body 1 and the second clamp body 2 are hingedly connected to each other at one side through a hinge shaft 3, and the first clamp body 1 and the second clamp body 2 are rotatable relative to each other around the hinge shaft 3, in addition, a locking assembly is detachably and jointly locked to the first clamp body 1 and the second clamp body 2 at the clamping opening between the first clamp body 1 and the second clamp body 2. It can be understood that the first clamp body 1 and the second clamp body 2 are connected to each other at the side close to the hinge shaft 3 and are freely rotatable, and the end away from the hinge shaft 3 is reserved with a clamping opening, which is finally firmly closed by the locking assembly, so as to exert a clamping force on the fixing member at the bridge monitoring position. In use, the locking assembly is loosened, the first clamp body 1 and the second clamp body 2 are opened to a certain angle through the hinge shaft 3, then the opened clamp bodies are arranged around the fixing member at the bridge monitoring position, and the two clamp bodies are closed to be locked at the clamping opening, and finally the two clamp bodies are locked and fixed through the locking assembly. Since the first clamp body 1 and the second clamp body 2 can be opened to a larger angle around the hinge shaft 3, and the locking assembly is locked at the clamping opening, the checking clamp can stably clamp various types of bridge fixing members, and the hinge type structure greatly simplifies the on-site installation and quick disassembly process, and can maintain high firmness and accuracy in a dynamic environment.

[0043] In one embodiment, specifically, the first clamp body 1 and the second clamp body 2 are integrally formed with a first connecting plate 4 and a second connecting plate 5 at the side away from the hinge shaft 3, and the locking assembly comprises two connecting screws 6, the first connecting plate 4 and the second connecting plate 5 are overlapped with each other in the closed state of the first clamp body 1 and the second clamp body 2, and the connecting screws 6 penetrate and jointly lock the first connecting plate 4 and the second connecting plate 5. When the clamp body is rotated to be closed, the first connecting plate 4 and the second connecting plate 5 are overlapped with each other, the connecting screws 6 penetrate the two connecting plates from the reserved through holes and are tightened, and the locking of the ends of the first clamp body 1 and the second clamp body 2 is completed, when it is necessary to disassemble or adjust the size of the clamping opening, the connecting screws 6 are loosened, and the clamp body can be opened again for subsequent operation. It can be understood that the connecting plate is integrally formed with the clamp body in this embodiment, which is beneficial to reduce the number of parts, improve the manufacturing accuracy, and the first connecting plate 4 and the second connecting plate 5 are centrally locked through the two connecting screws 6 after being overlapped, which can bring greater clamping force and stability. In addition, the combination of the first connecting plate 4, the second connecting plate 5 and the screw 6 forms a reliable bearing and locking area at the side away from the hinge shaft of the clamp assembly, when the clamp body is closed, the connecting screw 6 can exert an axial pre-tightening force on the overlapped connecting plates, improve the clamping strength and anti-loosening ability of the whole clamp, and can be beneficial to meet the higher stability requirements of the bridge site.

[0044] In one embodiment, specifically, the first clamping body 1 and the second clamping body 2 are integrally formed with a first limiting block 7 and a second limiting block 8 respectively on one side, and the clamping opening between the first clamping body 1 and the second clamping body 2 is distributed on opposite sides of the hinge shaft 3. In use, when the first clamping body 1 and the second clamping body 2 are closed, the first limiting block 7 and the second limiting block 8 are separated from each other and form an angle, and the angle is consistent with the opening angle between the first clamping body 1 and the second clamping body 2. During the process of rotating the first clamping body 1 and the second clamping body 2 from the closed state to the open state, the first limiting block 7 and the second limiting block 8 rotate and approach each other. In this structure, the first limiting block 7 and the second limiting block 8 are respectively located at the outer side or the side edge of the two clamping bodies, and have a certain angle or position distribution with the hinge shaft 3. When the clamping opening is closed, there is a certain space between the limiting blocks, i.e. a separation state, and the space directly corresponds to the opening angle of the clamping body. During the process of opening the clamping body, the limiting blocks move synchronously with the clamping body, gradually approach and finally limit the maximum opening angle of the clamping body. In the use process, when the first clamping body 1 and the second clamping body 2 are closed and locked, the first limiting block 7 and the second limiting block 8 are separated by a certain angle and correspond to the closed state. When the locking assembly is released and the clamping body is opened, the clamping body rotates around the hinge shaft 3, and the limiting blocks also move. As the clamping body continues to open, the first limiting block 7 and the second limiting block 8 gradually approach each other. When the maximum opening degree is reached, the two limiting blocks may abut or have a small gap, thereby limiting the excessive opening of the clamping body. It can be understood that the two limiting blocks of this structure can effectively protect the hinge part (hinge shaft) and the corresponding connecting part by limiting the rotation range of the clamping body, reduce the risk of component wear or fracture caused by excessive force, and to some extent, also simplify the operation. The operator can judge whether the clamping body is completely closed or has reached the safe maximum opening degree by observing the relative position of the two limiting blocks, thereby preventing misoperation.

[0045] In one embodiment, the clamp assembly further comprises two locking screws 9, which are screwed to the second clamp body 2 and penetrate into the clamping space between the first clamp body 1 and the second clamp body 2 for clamping the fixing member at the bridge monitoring position. In addition, a rubber layer 10 is wrapped around the inner wall of the first clamp body 1 and the second clamp body 2 in the clamping space between the first clamp body 1 and the second clamp body 2. In this structure, the end of the locking screw 9 is clamped against the surface of the fixing member at the bridge monitoring position by screwing the locking screw 9 from the outside of the second clamp body 2, and the rubber layer 10 covers or wraps around the inner wall of the two clamp bodies, providing a layer of elastic contact surface to enhance the anti-skid, shock absorption and protection effect. During installation, the first clamp body 1 and the second clamp body 2 are initially closed and locked by the locking assembly, the locking screw 9 is screwed, the end of the screw is clamped against the fixing member at the bridge monitoring position, the clamping force or positioning accuracy is further adjusted, and the rubber layer 10 plays a role of buffering, increasing friction and preventing damage between the clamp and the fixing member. It can be understood that by adjusting the clamping of the locking screw 9, multiple clamping modes (first clamping by the whole clamp body and then clamping by the single-point screw) are realized, which allows for on-site fine adjustment according to the shape or size of the fixing member to some extent, improves the clamping effect, and the rubber layer 10 is attached to the inner wall, which makes the contact flexible during clamping and enhances the anti-skid performance, reduces the probability of loosening due to vibration or long-term loading, and protects the bridge member from being directly pressed by metal.

[0046] In one embodiment, specifically, the bearing platform 101 comprises a bearing plate 11, a sliding groove 12 and two fixing clamps 13. The bearing plate 11 is used to match the bottom plane of the bridge displacement monitoring device, the sliding groove 12 is opened on the surface of the bearing plate 11, and the two fixing clamps 13 are used to jointly clamp the bridge displacement monitoring device on the bearing plate 11 from opposite sides. The two fixing clamps 13 are slidably arranged on the bearing plate 11 and are respectively slidably matched with the sliding groove 12. In addition, the front side of the bearing plate 11 is provided with a locking knob 14, which is loosely locked with the fixing clamps 13. In this structure, the bearing plate 11 corresponds to the "carrying table" of the verification fixture, which is used to place the bridge displacement monitoring device. The sliding groove 12 is opened on the bearing plate 11 in a transverse manner, and one fixing clamp 13 is installed on each side. The fixing clamp can slide in the sliding groove and is finally clamped by the locking knob 14. The locking knob 14 is installed on the front side of the bearing plate 11 and has a locking effect on the two fixing clamps 13. When installing, the bottom plane of the monitoring device is aligned and placed with the bearing plate 11. The two fixing clamps 13 are moved to approach each other along the sliding groove 12 until the side edges of the device are clamped. Finally, the locking knob 14 is tightened or loosened to lock the fixing clamps 13 in the corresponding position, and the installation and fixation of the device are completed. It can be understood that the two fixing clamps 13 of the above structure can slide on the sliding groove 12, which can flexibly adjust the clamping distance, so as to be beneficial to adapt to bridge displacement monitoring devices of different sizes on the same verification fixture. The combination of the fixing clamps 13 and the locking knob 14 enables the monitoring device to be quickly clamped on the bearing plate and easily disassembled. When displacement simulation and reading calibration are performed, the device will not shake or slide, which ensures the accuracy and repeatability of the verification data.

[0047] In one embodiment, specifically, two fixing clamps 13 are symmetrically distributed on the bearing plate 11, and each fixing clamp 13 comprises a pressing plate 131 and a barb plate 132. The bottom of the pressing plate 131 is integrally formed with a sliding block, the pressing plate 131 is slidingly fitted to the sliding groove 12 through the sliding block at the bottom, the barb plate 132 is integrally formed at one end of the pressing plate 131 away from the bearing plate 11, and the barb plate 132 is perpendicular to the pressing plate 131. When the two fixing clamps 13 are moved towards each other, the pressing plates 131 jointly clamp the bridge displacement monitoring device, and the barb plates 132 jointly fasten the bridge displacement monitoring device. In this structure, the sliding groove 12 formed on the surface of the bearing plate 11 can provide a linear movement guide for the pressing plate 131. The two fixing clamps 13 are symmetrically distributed on the bearing plate 11, meaning that the left and right or front and back positions are substantially the same, thereby forming a symmetric clamping space. The barb plate 132 is arranged at one end of the pressing plate 131 away from the bearing plate 11, and the two are perpendicular to each other. This structure enables the pressing plate 131 to smoothly move along the sliding groove 12, while the barb plate 132 exerts a fastening effect on the monitoring device in the vertical direction. When the two fixing clamps 13 are simultaneously moved towards each other along the sliding groove 12, the pressing plate 131 and the barb plate 132 will simultaneously clamp and fasten the outer wall or edge of the monitoring device, thereby exerting a restraining force on the device in the horizontal and vertical or inclined directions. During installation, the bridge displacement monitoring device is first placed at a designated position above the bearing plate 11, with the bottom surface of the device closely attached to the plane of the bearing plate 11. The two fixing clamps 13 are then slid on the bearing plate 11, so that the pressing plates 131 respectively adhere to the outer wall or shell of the device from both sides. As the two fixing clamps 13 continuously move towards each other, the barb plates 132 of the two fixing clamps 13 will gradually contact and fasten the upper edge or outer side of the monitoring device. After the two fixing clamps 13 are moved to the appropriate position, the position of the fixing clamps 13 in the sliding groove 12 can be fixed by the locking knob 14, forming a stable clamping state and ensuring that the device is difficult to shake or shift on the bearing plate 11. It can be understood that the barb plate 132 of the above structure enables the monitoring device to be tightly pressed by the pressing plate 131 while also obtaining additional fixing force from the "hooking" of the outer edge or upper edge of the device. This structure can effectively prevent the device from slipping in any direction, significantly enhancing the overall clamping strength. Moreover, since the pressing plate 131 and the barb plate 132 can work simultaneously at symmetric positions, and they can both smoothly move along the sliding groove 12 and be fixed by the locking knob 14, the installation or disassembly process is more convenient.

[0048] Optionally, the end of the barbed plate 132 away from the pressing plate 131 is arc-shaped, that is, in the two fixing clamps 13, the barbed plate 132 itself can be integrally formed or fixedly connected by a separate piece, and the end away from the pressing plate 131 is arc-shaped, that is, the side facing the monitoring device is arc-shaped. Since the arc-shaped end can better fit the outer edge of the device of different shapes, when the barbed plate 132 is in contact with the outer surface of the device, the contact area is increased or at least in line / surface contact, avoiding damage to the device shell caused by sharp corners. It is also beneficial to evenly apply force, and the arc-shaped end can effectively disperse the lateral force generated by clamping, avoiding concentration on a sharp corner, thereby reducing damage to the device shell. At the same time, during clamping, the contact is more complete, preventing the device from sliding or moving. Since the arc-shaped end has better adaptability, it can adapt to the outer surfaces of devices of various sizes and curvatures, and through larger area contact, local wear and tear is avoided, so that the verification clamp can be repeatedly and efficiently used.

[0049] In one embodiment, specifically, the displacement indicating element 102 includes a scale 15, and the positioning structure 100 is provided with a vertically extending / transversely extending notch 16. Optionally, in this embodiment, the notch 16 on the positioning structure 100 is vertically extending, and the notch 16 is selectively provided on the front side of the first clamp body 1. The scale 15 is slidingly embedded in the notch 16, and the upper end of the scale 15 is fixedly connected to the bottom of the support plate 11 and can be synchronously displaced with the support plate 11. The displacement adjusting mechanism 103 includes an adjusting knob 17 rotatably mounted on the positioning structure 100 and transmissionally connected to the scale 15 to adjust the lifting displacement of the scale 15. In this structure, the notch 16 is provided on the positioning structure 100 and can slidingly cooperate with the scale 15. When the support plate 11 moves in the vertical direction, the scale 15 moves up and down with it and remains stable in the notch 16. The upper end of the scale 15 is fixedly connected to the support plate 11, so that the two form an integral synchronous movement unit. Through this connection, the position change of the scale 15 can truly reflect the movement of the support plate 11, thereby providing an accurate reference for displacement indication.

[0050] Further, the adjusting knob 17 is installed on the positioning structure 100 and drives the scale 15 to move up and down in the slot 16 through an internal transmission mechanism such as a shaft, a gear, a friction wheel, etc. In use, when the bridge displacement monitoring device is installed on the support plate 11, the scale 15 and the support plate 11 are moved to an initial calibration position by the adjusting knob 17 to obtain a zero point or a reference point. Then, the user rotates the adjusting knob 17, the scale 15 slides in the slot 16, and the support plate 11 and the monitored device are simultaneously lifted to achieve synchronous displacement. The scale 15 has a scale, which can directly display the lifting displacement of the support plate 11. It can be understood that, in the above structure, the scale 15 moves synchronously with the support plate 11 as a whole, so that the analog displacement of the monitored device can be known by reading the scale of the scale 15, which can better verify the output value of the monitored device. The sliding structure of the scale 15 in the slot 16 is simple and reliable, and cooperates with the adjusting knob 17 to form a convenient and controllable fine displacement adjustment mechanism. Compared with the traditional measurement method relying on external simple measuring tools, the mechanism has higher precision and better efficiency.

[0051] In one embodiment, further, the displacement adjusting mechanism 103 further comprises a driving wheel 18, the adjusting knob 17 is transmissionally connected to the driving wheel 18 to drive the driving wheel 18 to rotate, and the scale 15 is drivingly connected to the driving wheel 18 to drive the scale 15 to displace through the driving wheel 18. In this structure, the adjusting knob 17 is installed on the front side of the first clamping body 1 of the positioning structure 100 and is pivotally connected to the first clamping body 1 through a rotating shaft and is transmissionally connected to the driving wheel 18 in the first clamping body 1, so that the adjusting knob 17 and the driving wheel 18 can synchronously rotate. Since the scale 15 is drivingly connected to the driving wheel 18, when the driving wheel 18 rotates, the rotating force of the driving wheel 18 is transmitted to the scale 15, so that the scale 15 moves up and down along the direction of the slot 16. In operation, when the user rotates the adjusting knob 17, the driving wheel 18 immediately rotates correspondingly, and the scale 15 linearly moves based on the driving connection with the driving wheel 18. While the scale 15 moves, the support plate 11 and the bridge displacement monitoring device above the support plate 11 are driven to achieve corresponding displacement simulation. It can be understood that, in the above structure, the displacement of the scale 15 is more uniform and controllable through the intermediate transmission of the driving wheel 18, so that accurate and repeatable control results can be obtained in small-range displacement adjustment. The user only needs to simply rotate the adjusting knob 17, and the rotating motion of the adjusting knob 17 is stably transmitted to the scale 15 through the driving wheel 18, which avoids unnecessary errors caused by rapid or excessive movement.

[0052] It should be noted that, in the above structure, the adjusting knob 17 can be coaxially connected to the rotating center of the driving wheel 18 through a rotating shaft or can be transmissionally connected to the driving wheel 18 through other existing transmission structures (such as a gear set) installed in the first clamping body 1, which can be understood by those skilled in the art.

[0053] More specifically, the driving wheel 18 is a friction wheel, and one side of the driving wheel 18 is in frictional connection with the side surface of the scale 15, and the driving wheel 18 drives the scale 15 to generate lifting displacement by friction. In this structure, the friction wheel is installed inside the first clamp body 1, so that the rim of the friction wheel can tightly abut against the side surface of the scale 15, and when the adjusting knob 17 is rotated, the friction wheel starts to rotate, and the friction force is formed between the friction wheel and the scale 15, so that the scale 15 moves accordingly, and the scale 15 can keep slight sliding resistance in the bayonet 16, so as to ensure that it can move smoothly when subjected to the thrust of the friction wheel. When the user continuously rotates the adjusting knob 17, the friction wheel also continuously drives the scale 15 to move up and down in the bayonet 16, so as to realize continuous adjustment of the displacement distance. It can be understood that, compared with the gear engagement, the side surface of the friction wheel and the scale 15 are only in contact by friction force, which reduces the hard impact and vibration between the metal gears and reduces the noise. Since the friction transmission has relatively soft dynamic response characteristics, the scale 15 can move more stably in the bridge site environment, and the instantaneous error caused by environmental vibration or rough operation is reduced.

[0054] Working principle: when checking the bridge displacement monitoring equipment, first unscrew the connecting screw 6 to open the clamp, install the clamp at the bridge monitoring position, and tighten the connecting screw 6 and the locking screw 9 to lock the clamp at the monitoring position. First, rotate the adjusting knob 17 to adjust the height of the scale 15 and record the scale on the scale at this time, then place the bridge displacement monitoring equipment on the supporting plate 11 and rotate the locking knob 14 to tighten the fixing clamp, so as to ensure the safety and stability of the displacement monitoring equipment, read the data on the displacement monitoring equipment at this time, and then rotate the adjusting knob 17 to raise the supporting plate 11 by a fixed height, for example, adjust the supporting plate 11 to rise by 100 centimeters, and fix the displacement monitoring equipment on the supporting plate 11, and the scale 15, the supporting plate 11 and the monitoring equipment move synchronously, and then read the data on the displacement monitoring equipment again. The data change value of the displacement monitoring equipment before and after adjusting the height of the scale is calculated, so as to check the precision of the displacement monitoring equipment. For different displacement distances, multiple records and checks can be performed, and finally the average value of multiple groups of data is obtained, so as to judge the precision of the displacement monitoring equipment.

[0055] Example two

[0056] The embodiment is similar to the embodiment one, and the difference is that the driving wheel 18 is a gear, and one side of the driving wheel 18 is engaged with a rack on the scale 15, and the driving wheel 18 engages the scale 15 to generate displacement. In this structure, the rack is arranged on the side of the scale 15, and the rack has a continuous tooth shape, the driving wheel 18 adopts a gear structure, the tooth part of which can be in one-to-one correspondence and close engagement with the rack, when the gear rotates, the rack and the scale 15 will be driven to move linearly along the bayonet 16, and the adjusting knob 17 and the gear are synchronously rotated through the shaft or coaxial structure, so that when the user rotates the adjusting knob 17, the gear will rotate at an angle matching it. When operating, when the user applies a certain torque to the adjusting knob 17, the gear starts to rotate, the rack and the gear are engaged with each other, so as to convert the rotary motion into the linear motion of the scale 15, if the modulus, pitch and the like of the gear and the rack are accurately matched, the displacement of the scale 15 can be accurately calculated according to the rotation angle of the gear, so as to realize the displacement adjustment and measurement with high precision. It can be understood that in the above structure, the close engagement of the gear and the rack can make the linear movement of the scale 15 and the rotation angle of the adjusting knob 17 have a fixed proportion, reducing the cumulative error or sliding difference, since the gear-rack can bear larger load torque, it can still run well in harsh environment or large displacement / heavy equipment calibration, expanding the application range of the verification fixture.

[0057] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A verification fixture for bridge displacement monitoring equipment, characterized in that, Includes a positioning structure (100) for fixing at the bridge monitoring location; The positioning structure (100) is provided with: a bearing platform (101) for bearing the bridge displacement monitoring equipment; a displacement indicating element (102); and a displacement adjustment mechanism (103); The bearing platform (101) is displaceably mounted on the positioning structure (100); the displacement adjustment mechanism (103) regulates the displacement of the bearing platform (101) relative to the positioning structure (100); and the displacement indicator element (102) indicates the displacement of the bearing platform (101) relative to the positioning structure (100) for verifying the displacement measurement data of the bridge displacement monitoring equipment.

2. The verification fixture for bridge displacement monitoring equipment according to claim 1, characterized in that, The positioning structure (100) includes: A clamp assembly for securing the device to a monitoring location on the bridge; a locking assembly detachably mounted on the clamp assembly; The clamping assembly holds the fixing member at the bridge monitoring position, and the locking assembly locks the clamping assembly so that the clamping assembly keeps the fixing member at the bridge monitoring position clamped.

3. The verification fixture for bridge displacement monitoring equipment according to claim 2, characterized in that, The clamp assembly includes: First clamp (1); second clamp (2), used together with the first clamp (1) to clamp the fixing piece at the bridge monitoring position; wherein, one side of the first clamp (1) and the second clamp (2) are hinged to each other by a hinge shaft (3), and the first clamp (1) and the second clamp (2) rotate to open and close about the hinge shaft (3); The locking assembly is detachably locked together with the first clamp (1) and the second clamp (2) at the clamping joint between the first clamp (1) and the second clamp (2).

4. The verification fixture for bridge displacement monitoring equipment according to claim 3, characterized in that, The first clamp (1) and the second clamp (2) are integrally formed with a first connecting plate (4) and a second connecting plate (5) on the side away from the hinge axis (3); the locking assembly includes at least one connecting screw (6); When the first clamp (1) and the second clamp (2) are closed to each other, the first connecting plate (4) and the second connecting plate (5) overlap each other, and the connecting screw (6) passes through and locks the first connecting plate (4) and the second connecting plate (5) together.

5. The verification fixture for bridge displacement monitoring equipment according to claim 3, characterized in that, The first clamp (1) and the second clamp (2) are integrally formed with a first limiting block (7) and a second limiting block (8) on one side respectively; the clamping opening between the first clamp (1) and the second clamp (2) and the first limiting block (7) and the second limiting block (8) are distributed on opposite sides of the hinge shaft (3). When the first clamp (1) and the second clamp (2) are closed to each other, the first limiting block (7) and the second limiting block (8) are separated from each other and form a certain angle with each other, and the angle is consistent with the opening angle between the first clamp (1) and the second clamp (2); during the process of the first clamp (1) and the second clamp (2) rotating from the closed state to the open state, the first limiting block (7) and the second limiting block (8) rotate to approach each other.

6. The verification fixture for bridge displacement monitoring equipment according to claim 3, characterized in that, The clamp assembly further includes: At least one locking screw (9) is threaded to the first clamp (1) or the second clamp (2) and passes through the clamping space between the first clamp (1) and the second clamp (2) to tighten the fixing at the bridge monitoring position; a rubber layer (10) is surrounded in the clamping space between the first clamp (1) and the second clamp (2), the rubber layer (10) being in contact with the inner wall of the first clamp (1) and the second clamp (2).

7. The verification fixture for bridge displacement monitoring equipment according to claim 1, characterized in that, The carrier platform (101) includes: A support plate (11) is used to fit the bottom plane of the bridge displacement monitoring device; a groove (12) is formed on the surface of the support plate (11); two fixing clips (13) are used to clamp the bridge displacement monitoring device on the support plate (11) from opposite sides, and the two fixing clips (13) are openably and slidably set on the support plate (11) and respectively slidably fitted into the groove (12); The support plate (11) is provided with a locking knob (14) on one side, which can be loosely or tightly locked to the fixing clip (13).

8. The verification fixture for bridge displacement monitoring equipment according to claim 7, characterized in that, The two fixing clips (13) are symmetrically distributed on the support plate (11) and each includes a pressure plate (131) and a hook plate (132); the pressure plate (131) is slidably fitted into the slide groove (12), and the hook plate (132) is disposed on the pressure plate (131) at one end away from the support plate (11) and perpendicular to the pressure plate (131); wherein, when the two fixing clips (13) are close together, the bridge displacement monitoring device is clamped by the pressure plate (131) and the bridge displacement monitoring device is fastened by the hook plate (132).

9. The verification fixture for bridge displacement monitoring equipment according to claim 7, characterized in that, The displacement indicating element (102) includes a measuring scale (15); the positioning structure (100) has a vertically extending / horizontally extending slot (16); the measuring scale (15) is slidably embedded in the slot (16); one end of the measuring scale (15) is fixedly connected to the support plate (11) and can move synchronously with the support plate (11); the displacement adjustment mechanism (103) includes an adjustment knob (17), the adjustment knob (17) is rotatably disposed on the positioning structure (100) and is drively connected to the measuring scale (15) to adjust the displacement of the measuring scale (15).

10. The verification fixture for bridge displacement monitoring equipment according to claim 9, characterized in that, The displacement adjustment mechanism (103) further includes a drive wheel (18), and the adjustment knob (17) is connected to the drive wheel (18) to drive the drive wheel (18) to rotate; the measuring scale (15) is connected to the drive wheel (18) to drive the measuring scale (15) to generate displacement through the drive wheel (18).

Images