A telescopic acquisition rod for high-altitude flying-buttress scanning of historic buildings

Abstract

The utility model discloses a telescopic acquisition rod for historical building high altitude archivolt scanning belongs to telescopic acquisition rod technical field, including telescopic rod main part, scanning camera, hold the handle and control mechanism, control mechanism sets up on hold the handle, is used for driving telescopic rod main part telescopic and is self -locking at any position, telescopic rod main part includes a plurality of sliding sleeve of setting in order, prevents completely from separating through spacing structure between adjacent sleeve, drive assembly is used for the synchronous retraction of all the elastic band piece, when the elastic band piece is released, the arched surface of multiple elastic band piece is opposite and supports each other and forms a rigid support body to push the telescopic rod main part elongation. This telescopic acquisition rod for historical building high altitude archivolt scanning adopts the rigid triangle structure formed by a plurality of elastic band piece mutual support as the driving and force core, and cooperates with worm and worm gear drive mechanism, solved the discrete adjustment problem of traditional telescopic rod.

Description

Technical Field

[0001] This utility model belongs to the field of telescopic data acquisition pole technology, and in particular relates to a telescopic data acquisition pole for high-altitude scanning of the bracket sets of historical buildings. Background Technology

[0002] Historical buildings, especially ancient wooden structures, possess not only immense artistic value in their large timber components such as brackets, arches, and purlins, but also serve as crucial embodiments of structural mechanics. High-precision digital archiving of these complex and fragile brackets, located high in the air, is fundamental to the preservation, research, and restoration of cultural relics. Currently, 3D laser scanners or high-resolution digital cameras are commonly used for data acquisition. However, raising the acquisition equipment to heights of several meters or even more than ten meters and maintaining its stability presents a significant technical challenge.

[0003] In existing technologies, operators often use simple telescopic rods to manually adjust and lock the length of multiple sleeve sections by inserting and removing them, using threads, pin holes, or elastic buttons. This adjustment method has inherent drawbacks: because the adjustment process is discrete and segmented, and each adjustment requires manual unlocking, positioning, and relocking, it is impossible to achieve continuous and smooth changes in the length of the telescopic rod during data acquisition. When performing continuous, multi-angle scanning of a complex bracket set, the operator must frequently interrupt the data acquisition process to adjust the rod length, greatly affecting work efficiency. More seriously, the repeated start-stop and locking impacts can easily cause the rod to vibrate, resulting in misalignment or blurring of the acquired point cloud data or image sequences, making it difficult to form a complete and accurate 3D model. Therefore, a high-altitude data acquisition rod that can achieve stepless adjustment, stable self-locking at any position, and ensure continuous and stable operation has become an urgent need in this specific technical field.

[0004] To address this issue, we propose a retractable data acquisition pole for high-altitude scanning of the bracket sets of historical buildings. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the existing adjustment process is discrete and segmented, and each adjustment requires manual unlocking, positioning and locking, which makes it impossible to achieve continuous and smooth changes in the length of the telescopic rod during the acquisition process. Therefore, this invention proposes a telescopic acquisition rod for scanning the high-altitude brackets of historical buildings.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A telescopic data acquisition pole for scanning the dougong (bracket sets) of historical buildings at high altitudes includes a telescopic pole body and a scanning camera mounted at one end thereon, and also includes:

[0008] A handle is located at the other end of the telescopic rod body;

[0009] A control mechanism, located on the grip, is used to drive the telescopic rod body to extend and retract and to self-lock at any position.

[0010] The telescopic rod body includes multiple sleeves that are slidably fitted in sequence, and adjacent sleeves are prevented from completely detaching by a limiting structure;

[0011] The control mechanism includes a drive assembly and multiple elastic belts;

[0012] The elastic band is made of elastic steel strip, and its cross-section in its natural state has a prefabricated arched structure. One end of the elastic band is fixedly connected to the top of the innermost sleeve of the telescopic rod body, and the other end is wound around the drive assembly.

[0013] The drive assembly is used to synchronously extend and retract all the elastic bands. When the elastic bands are released, the arched surfaces of the multiple elastic bands face each other and support each other to form a rigid support body, thereby pushing the telescopic rod body to extend.

[0014] Preferably, the driving component includes:

[0015] The outer casing is fixed to the grip handle;

[0016] Multiple rotating shafts are rotatably disposed within the housing, and each rotating shaft is wound with one of the elastic belts;

[0017] A transmission mechanism is used to connect all the said rotating shafts to achieve synchronous rotation;

[0018] A self-locking drive unit is connected to the transmission mechanism and is used to drive the rotating shaft to rotate and achieve self-locking.

[0019] Preferably, the number of elastic bands is three, and they are arranged at equal intervals along the circumference; when the elastic bands extend, their arched surfaces converge and fit together to form a rigid support structure with a triangular cross-section, and the outer wall of the support structure is tangent to the inner wall of the innermost sleeve.

[0020] Preferably, the transmission mechanism includes multiple connecting rods, which are connected to the rotating shafts via universal couplings to achieve synchronous rotation of the multiple rotating shafts.

[0021] Preferably, the self-locking drive unit includes:

[0022] The worm gear is fixedly mounted on a connecting rod of the transmission mechanism;

[0023] A worm gear is rotatably mounted on the housing and meshes with the worm wheel;

[0024] The rocker arm is fixedly connected to the end of the worm gear.

[0025] Preferably, the limiting structure includes:

[0026] An outwardly expanding bulging structure formed at the bottom of the previous stage casing;

[0027] An inwardly contracting constriction structure formed at the top of the next-level casing;

[0028] The expansion structure and the contraction structure work together to limit the maximum expansion and contraction stroke between adjacent sleeves.

[0029] Preferably, the sidewall of the sleeve is provided with a recess extending along its axial direction, and adjacent sleeves are circumferentially limited by the recess.

[0030] In summary, the technical effects and advantages of this utility model are as follows:

[0031] This telescopic data acquisition rod, used for high-altitude scanning of the dougong (bracket sets) of historical buildings, employs a rigid triangular structure formed by multiple circumferentially spaced elastic bands supporting each other as its driving and load-bearing core. Combined with a worm gear transmission mechanism, it solves the discrete adjustment problem of traditional telescopic rods. Specifically, by shaking the rocker arm, the worm gear, worm wheel, and synchronously connected rotating shaft are driven, allowing for precise and stable extension and retraction of the elastic bands, thus continuously extending and retracting the sleeve. This achieves stepless and smooth adjustment of the rod length throughout its entire range. Thanks to the inherent reverse self-locking characteristic of the worm gear transmission pair, the transmission system is automatically locked when shaking stops, allowing the telescopic rod to remain stably stationary at any extension length without additional locking operations. This enables operators to continuously acquire data while slowly adjusting the rod length during dougong scanning, achieving uninterrupted scanning operations. It effectively avoids equipment vibration caused by frequent starts and stops and locking impacts, fundamentally ensuring the integrity and high precision of point cloud data and image sequences.

[0032] This invention significantly enhances the overall structural rigidity and stability of the telescopic boom in its fully extended state, providing a solid operating platform for high-altitude scanning. Traditional multi-section sleeves, when fully extended, exhibit poor lateral stiffness and are prone to bending vibrations due to wind or slight movements by the operator. In this invention, three elastic bands with prefabricated arched structures converge and fit tightly together after extension, forming a central rigid support with a triangular cross-section located at the axis of the sleeve. This triangular structure, tangential to the inner wall of the innermost sleeve, integrates its own rigidity with the sleeve, greatly enhancing the bending and torsional resistance of the entire telescopic boom. It effectively suppresses low-frequency swaying and high-frequency vibrations during operation, providing an extremely stable platform for the scanning camera at the top and further ensuring the clarity and accuracy of the acquired data. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0034] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0035] Figure 3 This is a schematic diagram of the limiting structure in this utility model;

[0036] Figure 4 This is a schematic diagram of the recessed portion in this utility model;

[0037] Figure 5 for Figure 2 Enlarged structural diagram of part A in the middle;

[0038] Figure 6 This is a cross-sectional view of the outer shell of this utility model;

[0039] Figure 7 This is a schematic diagram of the arrangement structure of the elastic belt in this utility model.

[0040] In the diagram: 1. Telescopic rod body; 11. Sleeve; 111. Expanding structure; 112. Closing structure; 113. Recessed part; 2. Scanning camera; 3. Handle; 4. Elastic belt; 5. Housing; 51. Shaft; 52. Connecting rod; 53. Universal coupling; 61. Worm gear; 62. Worm; 63. Rocker arm. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0042] Reference Figure 1-7 A telescopic data acquisition pole for high-altitude scanning of the bracket sets of historical buildings includes a telescopic pole body 1, a scanning camera 2, a handle 3, and a control mechanism that integrates drive and self-locking.

[0043] The telescopic rod body 1 serves as the support and extension structure for the entire device. It consists of multiple stainless steel sleeves 11 with increasing diameters, slidingly fitted together in sequence. To ensure smooth extension and retraction and prevent unexpected detachment, a limiting structure is provided between adjacent sleeves 11. Specifically, the limiting structure includes an outwardly expanding bulge structure 111 at the bottom of the upper-level sleeve 11 and an inwardly contracting condensation structure 112 at the top of the lower-level sleeve 11. When a sleeve 11 extends to its limit position, the bulge structure 111 of the upper-level sleeve 11 hooks with the condensation structure 112 of the lower-level sleeve 11, mechanically preventing the sleeve 11 from being completely pulled out and ensuring operational safety. In addition, to prevent relative rotation of each sleeve 11 during the extension and retraction process, which would cause the orientation of the top scanning camera 2 to deflect unexpectedly, a recess 113 extending along its axial direction is provided on the side wall of each sleeve 11. Adjacent sleeves 11 are circumferentially limited by the recess 113, so that the sleeve 11 can only move in a straight line along the axial direction, effectively maintaining the stability of the scanning posture.

[0044] The scanning camera 2 is fixedly installed at the top of the telescopic rod body 1 (i.e. the head of the thinnest section of the sleeve 11). The scanning camera 2 can be selected from three-dimensional laser scanners or high-resolution digital cameras according to the specific scanning accuracy requirements. Its purpose is to obtain high-precision images or three-dimensional point cloud data of the high-altitude bracket without contact.

[0045] The handle 3 is located at the very end of the telescopic rod body 1 (i.e., the thickest section of the sleeve 11), providing the operator with a comfortable grip point. The control mechanism is integrated into the handle 3, which functions to achieve precise and continuous control of the length of the telescopic rod body 1 and to reliably self-lock at any extended position.

[0046] Reference Figure 2-7 The control mechanism includes a drive assembly and multiple elastic belts 4;

[0047] The elastic band 4 is made of highly elastic steel, which is essentially a special steel strip. In its naturally extended state, the cross-section of the steel strip is not straight, but is pre-formed through a precision rolling process. It is pre-made into a unidirectional arc-shaped arched structure with a specific curvature, which gives the elastic band 4 significant directional stiffness in the direction perpendicular to its width. When it needs to be retracted, the elastic band 4 can be wound around the central pivot 51 of the drive assembly. At this time, its arc-shaped arched structure will be forced to bend and flatten to adapt to compact winding and storage, similar to a tape measure structure, thus achieving the characteristics of "rigid when extended and easy to store when retracted".

[0048] In this embodiment, three elastic bands 4 are preferably provided, which are equidistantly arranged along the circumference. One end of each elastic band 4 is wound around an independent rotating shaft 51, and the other end extends upward, eventually being fixedly connected to the top of the innermost sleeve 11 of the telescopic rod body 1. When the drive assembly releases these elastic bands 4, they return to their arched state under their own elasticity. Because they are equidistantly arranged circumferentially, their arched surfaces naturally converge towards the center and fit tightly together. These three arc surfaces support each other, forming a stable central rigid support body with a cross-section approximately equal to an equilateral triangle (e.g., ...). Figure 7 As shown), the outer wall of this triangular support is tangent to the inner wall of the sleeve 11, which greatly enhances the bending and torsional stiffness of the entire extension structure. By simultaneously extending and retracting these three elastic bands 4, the rigid triangle formed can lift or pull back the telescopic rod body 1, thereby achieving continuous and stable extension and shortening of the telescopic rod.

[0049] The drive assembly is responsible for providing power and achieving synchronous transmission and self-locking. It includes a housing 5 fixed to the handle 3. Multiple rotating shafts 51 are rotatably arranged inside the housing 5, the number of which corresponds to the elastic belts 4. To ensure that the extension and retraction lengths of all elastic belts 4 are completely consistent and to avoid jamming or uneven force due to asynchrony, a transmission mechanism is set up. The transmission mechanism includes multiple connecting rods 52. These connecting rods 52 are connected to their respective rotating shafts 51 through universal couplings 53. The use of universal couplings 53 allows transmission between the rotating shafts 51 and the connecting rods 52 even when there is an angular deviation, ensuring smooth and reliable transmission, thereby achieving precise synchronous rotation of all rotating shafts 51.

[0050] Reference Figure 5-6 The power input and self-locking function of the drive component are realized by a self-locking drive unit, which includes a worm gear 61, a worm 62, and a rocker arm 63. The worm gear 61 is fixedly mounted on one of the connecting rods 52, which serves as the driving rod. The worm 62 is rotatably mounted on the housing 5 via bearings and meshes with the worm gear 61. The rocker arm 63 is fixedly connected to the end of the worm 62 for the operator to crank. When the operator cranks the rocker arm 63 clockwise or counterclockwise, the power is transmitted to the worm gear 61 through the worm 62, thereby driving the connecting rod 52 and the rotating shaft 51 to rotate synchronously, realizing the winding or unwinding of the elastic belt 4. Due to the inherent reverse self-locking characteristic of the worm gear mechanism, that is, the worm 62 can drive the worm gear 61, but the worm gear 61 cannot drive the worm 62 in the reverse direction, so that when the rocker arm 63 is stopped, the entire transmission system is automatically locked. The telescopic rod can achieve stable and reliable self-locking at any extension length without the need for additional braking or locking operations.

[0051] The working process of this utility model is as follows:

[0052] The operator holds the handle 3 and points the telescopic rod body 1 towards the high-altitude arch to be scanned. By slowly shaking the rocker arm 63, the control mechanism is activated, causing the three elastic bands 4 to release synchronously and form a rigid triangular support. This pushes the sleeves 11 of each stage out in sequence, raising the scanning camera 2 to the target position. During this process, thanks to the self-locking property of the worm gear mechanism, the telescopic rod can be suspended at any height. Simultaneously, continuous telescopic adjustment allows the operator to perform uninterrupted continuous scanning of the arch, greatly improving the efficiency and completeness of data acquisition. The constriction structure 112 and expansion structure 111 between the sleeves 11, as well as the axial recess 113, together ensure the smoothness and safety of the lifting process. After scanning is completed, shaking the rocker arm 63 in the opposite direction retracts the elastic bands 4, causing the telescopic rod body 1 to retract smoothly for easy transport and storage.

Claims

1. A telescopic data acquisition rod for scanning the high-altitude brackets of historical buildings, comprising a telescopic rod body (1) and a scanning camera (2) disposed at one end thereof, characterized in that, Also includes: A handle (3) is provided at the other end of the telescopic rod body (1); The control mechanism is set on the grip (3) and is used to drive the telescopic rod body (1) to extend and retract and self-lock at any position; The telescopic rod body (1) includes multiple sleeves (11) that are slidably fitted in sequence, and adjacent sleeves (11) are prevented from completely separating by a limiting structure; The control mechanism includes a drive assembly and multiple elastic belts (4); The elastic band (4) is made of elastic steel strip and has a prefabricated arched structure in its cross-section in its natural state. One end of the elastic band (4) is fixedly connected to the top of the innermost sleeve (11) of the telescopic rod body (1), and the other end is wound around the drive assembly. The drive assembly is used to synchronously retract and extend all elastic bands (4). When the elastic bands (4) are released, the arched surfaces of multiple elastic bands (4) face each other and support each other to form a rigid support body, so as to push the telescopic rod body (1) to extend.

2. The retractable data acquisition rod for high-altitude scanning of dougong (bracket sets) of historical buildings according to claim 1, characterized in that, The driving component includes: The outer shell (5) is fixed to the grip handle (3); Multiple shafts (51) are rotatably disposed within the housing (5), and each shaft (51) is wound with one of the elastic bands (4). A transmission mechanism is used to connect all rotating shafts (51) to achieve synchronous rotation; The self-locking drive unit is connected to the transmission mechanism and is used to drive the rotating shaft (51) to rotate and achieve self-locking.

3. A retractable data acquisition rod for high-altitude scanning of dougong (bracket sets) in historical buildings according to claim 1, characterized in that, The number of elastic bands (4) is three, and they are arranged at equal intervals along the circumference. When the elastic bands (4) extend, their arched surfaces converge and fit together to form a rigid support structure with a triangular cross-section. The outer wall of the support structure is tangent to the inner wall of the innermost sleeve (11).

4. A retractable data acquisition rod for high-altitude scanning of dougong (bracket sets) in historical buildings according to claim 2, characterized in that, The transmission mechanism includes multiple connecting rods (52), which are connected to the rotating shafts (51) via universal couplings (53) to achieve synchronous rotation of the multiple rotating shafts (51).

5. A retractable data acquisition rod for high-altitude scanning of dougong (bracket sets) in historical buildings according to claim 4, characterized in that, The self-locking drive unit includes: The worm gear (61) is fixedly installed on a connecting rod (52) of the transmission mechanism; The worm (62) is rotatably mounted on the housing (5) and meshes with the worm wheel (61); The rocker arm (63) is fixedly connected to the end of the worm gear (62).

6. A retractable data acquisition rod for high-altitude scanning of dougong (bracket sets) in historical buildings according to claim 1, characterized in that, The limiting structure includes: An outwardly expanding bulging structure (111) is formed at the bottom of the upper-level sleeve (11). An inwardly contracting closure structure (112) is formed at the top of the next-level sleeve (11). The expansion structure (111) and the contraction structure (112) cooperate with each other to limit the maximum extension and contraction stroke between adjacent sleeves (11).

7. A retractable data acquisition rod for high-altitude scanning of dougong (bracket sets) in historical buildings according to claim 1, characterized in that, The sleeve (11) has a recess (113) extending along its axial direction on its side wall, and adjacent sleeves (11) are circumferentially limited by the recess (113).

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