Non-contact deformation monitoring device for large-span space steel structure

Abstract

The utility model discloses a non-contact deformation monitoring device for a large-span space steel structure, which belongs to the technical field of steel structures, and comprises an acquisition equipment body, a base, a pressure plate, a swing rod and a locking mechanism, and a plurality of supporting legs are arranged below the base; the pressure plate is arranged above the base; the swing rod penetrates through the center of the base and the center of the pressing disc, a ball is fixed to the swing rod, and a balancing weight is arranged at the bottom of the swing rod. The balancing weight can naturally droop downwards under the action of gravity, so that the ball body can rotate in a groove formed by the base and the pressure plate, the collecting equipment body is located over the ball body, the purpose of automatic leveling is achieved, the distance between the base and the pressure plate can be reduced under the action of the locking mechanism, and the collecting equipment body can be conveniently and rapidly leveled. And a groove in the pressure plate is matched with a groove in the base to further extrude the ball body, so that the ball body is fixed by virtue of friction force, the swing rod does not shake any more, and the situation that the acquisition equipment body shakes during rotary acquisition, so that the acquired information is inaccurate is avoided.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology, specifically to a non-contact deformation monitoring device for large-span spatial steel structures. Background Technology

[0002] Large-span spatial steel structures are susceptible to deformation due to their large spans, the movement of people, and their own weight. Even minor deformations, if not detected and addressed promptly, can lead to increased deflection, reduced structural performance, and even safety accidents. Therefore, frequent monitoring of deformation is necessary. Deformation monitoring devices can be categorized into contact and non-contact types. Non-contact deformation monitoring devices acquire visual images or 3D point cloud information using scanners, total stations, or other data acquisition equipment. This information is then compared and analyzed with historical data to determine the degree of deformation in the steel structure. Typically, this involves an acquisition device and a tripod. After the tripod is positioned correctly, the acquisition device scans the large-span spatial steel structure and performs 3D dimensional analysis.

[0003] While adjusting the tripod can level the data acquisition device, it requires fine-tuning each of the three legs individually, which is time-consuming in practice. Chinese utility model patent CN215984487U discloses a device for detecting the overall deformation of a building steel structure. It features a support frame and a leveling structure, allowing for rapid leveling using gravity. However, it lacks a limiting mechanism after leveling, which can cause the adjusting rod to wobble during operation, preventing the device from stably maintaining its leveled state. Utility Model Content

[0004] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a non-contact deformation monitoring device for large-span spatial steel structures, which can not only automatically level itself but also stably maintain the position of the data acquisition device body.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: The non-contact deformation monitoring device for large-span spatial steel structures provided by this utility model includes:

[0006] The data acquisition device itself;

[0007] A base, with multiple supporting legs provided underneath;

[0008] A pressure plate, wherein the pressure plate is disposed above the base;

[0009] A pendulum rod passes through the center of the base and the pressure plate. A ball is fixed on the pendulum rod and is located between the base and the pressure plate. The base and the pressure plate have grooves that mate with the ball. A counterweight is provided at the bottom of the pendulum rod. The main body of the acquisition device is located at the top of the pendulum rod.

[0010] A locking mechanism is arranged on the base and used to drive the pressing plate to move towards the base so that the recess abuts against the ball.

[0011] Preferably, a plurality of parallel guide columns are fixed on the base and movably inserted into the pressing plate.

[0012] Preferably, the locking mechanism comprises a locking rod which is rotatably installed on the base and threadedly matched with the pressing plate, and the locking rod is parallel to the guide columns.

[0013] Preferably, a first disc body is fixed on the top of the swing rod, a connecting block is fixed on the first disc body, and the connecting block and the first disc body constitute a planar moving pair.

[0014] Preferably, a first sliding groove is formed in the first disc body, a sliding block is slidably installed in the first sliding groove, a second disc body is fixed on the sliding block, and the connecting block is slidably installed on the second disc body.

[0015] Preferably, the sliding direction of the sliding block in the first sliding groove is perpendicular to the sliding direction of the connecting block on the second disc body.

[0016] Preferably, a first screw rod is rotatably installed on the first disc body and threadedly matched with the sliding block, and a second screw rod is rotatably installed on the second disc body and threadedly matched with the connecting block.

[0017] Preferably, anti-skid knobs are arranged at the ends of the first screw rod and the second screw rod.

[0018] Preferably, the support legs are three in total, the three support legs are uniformly distributed along the circumference of the base and hingedly connected with the base, and the base is provided with a convex ring for limiting the maximum rotation angle of the support legs.

[0019] Preferably, the support legs are telescopic rods, and the bottom of each support leg is provided with a rubber sleeve.

[0020] The utility model has the advantages of:

[0021] The counterweight can naturally sag downward under the action of gravity, so that the ball can rotate in the groove formed by the base and the pressing disc, drives the swing lever above to rotate with the ball as the center, so that the collecting equipment body is above the ball, the purpose of automatic leveling is realized, the base and the pressing disc can reduce the spacing under the action of the locking mechanism, the groove on the pressing disc cooperates with the groove on the base to further extrude the ball, so that the ball is fixed by friction, the swing lever cannot shake, so that the collecting equipment body does not shake during rotation collection, and the inaccurate collection information is avoided; meanwhile, the utility model also designs the first disc body and the second disc body, the first disc body is fixedly connected with the top of the swing lever, and the second disc body can move on the first disc body, the connecting block can move on the second disc body, and the collecting equipment body is fixed on the connecting block, so that the user can adjust the position of the collecting equipment body relative to the swing lever, the center of gravity of the collecting equipment body, the center of the ball and the center of gravity of the counterweight are adjusted to be on the same straight line, so that leveling is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0023] Figure 1 The utility model provides a non - contact type deformation monitoring devices for long - span space steel structure's perspective view.

[0024] Figure 2 The utility model provides a non - contact type deformation monitoring devices for long - span space steel structure's front view.

[0025] Figure 3 The utility model provides a non - contact type deformation monitoring devices for long - span space steel structure's plan when omitting collecting equipment body.

[0026] Figure 4 For Figure 3 The sectional view of A-A in Fig.

[0027] Figure 5 For Figure 4 The local enlarged view of A in Fig.

[0028] Figure 6 For Figure 3 The sectional view of B-B in Fig.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1. Data acquisition device body; 2. Base; 3. Support leg; 4. Pressure plate; 5. Swing rod; 6. Ball; 7. Counterweight; 8. Guide column; 9. Locking rod; 10. First disc; 11. Connecting block; 12. First slide groove; 13. Slider; 14. Second disc; 15. First lead screw; 16. Second lead screw; 17. Anti-slip knob; 18. Convex ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] like Figures 1 to 6 As shown, Embodiment 1 of this utility model provides a non-contact deformation monitoring device for large-span spatial steel structures. It features a rapid leveling function for the main body 1 of the acquisition device, enabling faster deployment and deformation monitoring of large-span spatial steel structures. The main structure of this utility model includes the acquisition device body 1, a base 2, a pressure plate 4, a swing rod 5, and a locking mechanism. The base 2 is disc-shaped, with a raised ring 18 fixed at its bottom. Three support legs 3 are evenly distributed and hinged on the inner wall of the raised ring 18. These three support legs 3 are telescopic rod structures, with rubber sleeves fitted at the bottom. The rubber sleeves increase friction with the ground, preventing the device from sliding during operation. The telescopic rod structure allows adjustment of the support leg 3 length according to the actual installation environment to adapt to different ground flatness levels, while also saving storage space. The raised ring 18 on the base 2 limits the maximum rotation angle of the support legs 3, preventing excessive rotation when the device is subjected to external forces, thus ensuring the stability of the device.

[0034] like Figure 1 and Figure 2As shown, the swing rod 5 passes through the center of the base 2 and the pressing disc 4, a ball 6 is sleeved on the swing rod 5, the position of the ball 6 on the swing rod 5 is fixed, and the axis of the swing rod 5 passes through the ball center of the ball 6. The ball 6 is between the base 2 and the pressing disc 4, and recesses matched with the ball 6 are formed on the base 2 and the pressing disc 4. Under the constraint of the base 2 and the pressing disc 4, the ball 6 is positioned between the upper and lower recesses, and when the recesses are not tightly fitted with the ball 6, the ball 6 can rotate in the recesses. The counterweight 7 is fixed at the bottom of the swing rod 5, and the body of the collecting device is arranged at the top of the swing rod 5. The distance between the counterweight 7 and the ball 6 is greater than the distance between the body of the collecting device and the ball 6. Under the action of gravity, the counterweight 7 naturally droops downward, so that the swing rod 5 naturally vertically centers on the ball 6, and the body of the collecting device 1 is located directly above the ball 6, thereby achieving automatic leveling.

[0035] When the automatic leveling is completed, the user can use the locking mechanism on the base 2 to drive the pressing disc 4 to move towards the base 2, so that the recesses tightly fit with the ball 6. The ball 6 is tightly pressed under the cooperation of the pressing disc 4 and the base 2, so that it cannot rotate freely any more, thereby realizing the fixation of the position and ensuring that the body of the collecting device 1 does not shake during operation.

[0036] Embodiment two:

[0037] On the basis of the embodiment one, the locking mechanism designed by the utility model comprises a locking rod 9 and four parallel guide columns 8. One end of the four guide columns 8 is fixed on the base 2, and the other end is movably inserted into the pressing disc 4. The guide columns 8 not only can guide the movement of the pressing disc 4, but also can enhance the connection stability between the base 2 and the pressing disc 4, prevent the pressing disc 4 from deviating during the movement process, and ensure that the locking mechanism can accurately drive the pressing disc 4 to tightly fit with the ball 6.

[0038] As shown in the figure, Figure 5 When the locking rod 9 is rotated, the pressing disc 4 will move towards the base 2 along the guide columns 8, so that the recesses on the base 2 and the pressing disc 4 further press the ball 6, the ball 6 is fixed by relying on the friction force, the swing rod 5 is prevented from shaking, the body of the collecting device 1 is prevented from shaking during the rotation collection, and the accuracy of the collected information is ensured.

[0039] Embodiment three:

[0040] On the basis of the embodiment one and the embodiment two, considering that the connecting mechanism preinstalled at the bottom of the collecting device body 1 of part models cannot guarantee that the center of gravity of the collecting device body 1 is on the axis of the swing rod 5, the utility model further designs the connecting structure between the collecting device body and the swing rod 5. Specifically, the swing rod 5 is fixedly connected with the first disc body 10 at the top, the first sliding slot 12 is formed in the first disc body 10, the sliding block 13 is slidably installed in the first sliding slot 12, the second disc body 14 is fixedly installed on the sliding block 13, and the connecting block 11 is slidably installed on the second disc body 14. The bottom of the collecting device body 1 is fixed on the connecting block 11.

[0041] Through the above setting, the connecting block 11 can move linearly on the second disc body 14, and the second disc body 14 can also move linearly on the first disc body 10. The sliding direction of the sliding block 13 in the first sliding slot 12 is perpendicular to the sliding direction of the connecting block 11 on the second disc body 14, which makes the connecting block 11 and the first disc body 10 form a planar moving pair, and the connecting block 11 can move in two perpendicular directions in a certain plane parallel to the surface of the first disc body 10. This makes the collecting device body 1 can move in two perpendicular directions in a certain plane perpendicular to the swing rod 5, which is convenient for the user to adjust the position of the collecting device body 1, and sets the center of gravity of the collecting device body 1, the center of the sphere 6 and the center of gravity of the counterweight 7 on the same straight line. In this way, it can be ensured that when the counterweight 7 drives the swing rod 5 to rotate, the counterweight 7 is directly below the sphere 6, the center of gravity of the collecting device body 1 is directly above the sphere 6, and the collecting device body 1 is in a horizontal state.

[0042] In order to facilitate adjustment, as shown in Figure 5 and Figure 6 , the first screw rod 15 is rotatably installed on the first disc body 10, and the first screw rod 15 is in threaded cooperation with the sliding block 13. The second screw rod 16 is rotatably installed on the second disc body 14, and the second screw rod 16 is in threaded cooperation with the connecting block 11. At the same time, anti-skid knobs 17 are arranged at the ends of the first screw rod 15 and the second screw rod 16. The user can drive the first screw rod 15 and the second screw rod 16 to rotate by rotating the anti-skid knobs 17.

[0043] When the first screw rod 15 is rotated, the sliding block 13 will slide in the first sliding slot 12, thereby driving the second disc body 14 to move. When the second screw rod 16 is rotated, the connecting block 11 will slide on the second disc body 14, thereby driving the collecting device body 1 to move. Through this screw rod transmission mode, the user can accurately adjust the position of the collecting device body 1 relative to the swing rod 5.

[0044] In practical applications, different large-span space steel structures may require different monitoring angles and positions, which requires multiple measurements. When different parts of the steel structure need to be monitored, the user can change the height of the device by adjusting the length of the support leg 3, and adjust the relative position of the acquisition device body 1 and the swing rod 5 by rotating the first lead screw 15 and the second lead screw 16, so that the acquisition device body 1 can be accurately automatically leveled, and the acquisition device body 1 can be aligned with the monitoring target, thereby improving the versatility and applicability of the device. The design of the counterweight 7 makes the swing rod 5 naturally vertical without external force, ensuring the leveling state of the device. Under the action of the locking mechanism, the ball 6 is fixed, and the swing rod 5 will not shake, further improving the stability of the device during the acquisition process, ensuring that the deformation information collected is accurate and reliable.

[0045] In summary, the non-contact deformation monitoring device for large-span space steel structure of the present application has the functions of automatic leveling, stable acquisition and precise position adjustment through reasonable structural design, and has good application prospect.

[0046] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A non-contact deformation monitoring device for long-span spatial steel structures, characterized by, The utility model relates to a kind of collection equipment, including: Collection equipment body; Base, the base is provided with multiple support legs below; Pressing plate, the pressing plate is set above base; Swing rod, the swing rod passes through the center of base and pressing plate, ball is fixed on the swing rod, the ball is between base and pressing plate, recess is opened in the base and pressing plate with ball cooperation, the bottom of swing rod is provided with counterweight, the collection equipment body is set on the top of swing rod; Locking mechanism, set on base, for driving pressing plate to move to base, make recess abut ball.

2. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 1, characterized in that, Multiple parallel guide posts are fixed on the base, and multiple guide posts are movably inserted on the pressing plate.

3. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 2, characterized in that, The locking mechanism includes locking rod, the locking rod is rotatably installed on the base and is screwed with the pressing plate, and the locking rod is parallel with the guide post.

4. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 1, characterized in that, The top of swing rod is fixed with first disc body, and the bottom of collection equipment body is fixed with connecting block, the connecting block is set on the first disc body, and the connecting block and first disc body constitute plane moving pair.

5. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 4, characterized in that, First sliding slot is opened in the first disc body, and sliding block is slidably installed in the first sliding slot, second disc body is fixed on the sliding block, and the connecting block is slidably installed on the second disc body.

6. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 5, characterized in that, The sliding direction of sliding block in first sliding slot is perpendicular to the sliding direction of connecting block on second disc body.

7. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 5, characterized in that, First screw rod is rotatably installed on the first disc body, and the first screw rod is screwed with sliding block;Second screw rod is rotatably installed on the second disc body, and the second screw rod is screwed with connecting block.

8. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 7, characterized in that, Anti-skid knob is arranged at the end of first screw rod and second screw rod.

9. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 1, characterized in that, The support leg is three, and the support leg is evenly distributed along the circumference of base and is hinged with base, the base is provided with convex ring for limiting the maximum rotation angle of support leg.

10. The non-contact deformation monitoring device for long-span spatial steel structures according to claim 1, characterized in that, The support leg is telescopic rod, and the bottom of support leg is provided with rubber sleeve.

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