Elastic hoisting damping structure for IMU damping
By using an elastic suspension and shock absorption structure to suspend the IMU sensor with elastic ropes, the problems of weak impact resistance and limited shock absorption effect in the existing technology are solved, and triple protection of the IMU is achieved: shock absorption, anti-resonance and anti-detachment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-28
- Publication Date
- 2026-03-31
AI Technical Summary
Existing IMU vibration reduction solutions have weak resistance to severe impacts and limited vibration reduction effects, failing to effectively prevent resonance and detachment, which can lead to equipment damage or failure.
An elastic suspension and shock absorption structure is adopted, in which the IMU sensor is suspended in the outer frame by elastic rope assembly. The elastic deformation of the elastic rope absorbs the vibration energy, and combined with multi-point limiting function, it prevents detachment and resonance.
It achieves triple protection for the IMU, reduces measurement data drift, prevents destructive equipment detachment and resonance, and has a simple structure, low cost, strong adaptability, and is easy to maintain.
Smart Images
Figure CN121761068A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of vibration reduction structure technology, and specifically relates to an elastic hoisting vibration reduction structure for IMU vibration reduction. Background Technology
[0002] As a high-precision inertial measurement unit, the IMU (gyroscope) is directly affected by vibration and impact. During the high-speed travel, take-off and landing of unmanned vehicles or the operation of construction machinery, continuous vibration and instantaneous violent impact will be generated. This will not only cause the IMU measurement data to drift, but may also cause resonance due to vibration, further amplifying structural damage. At the same time, severe impact can easily cause the IMU mounting structure to loosen or detach, leading to equipment failure or even permanent damage.
[0003] Existing IMU vibration damping solutions mostly employ spring damping, rubber pad cushioning, or rigid fixing with a buffer layer structure, which have the following drawbacks: spring damping structures are bulky and have poor adaptability; rubber pad cushioning is prone to aging, and its damping effect diminishes after long-term use, and it has weak resistance to violent impacts; while the rigid fixing with a buffer layer structure can prevent detachment to a certain extent, its damping effect is limited and it cannot effectively avoid the risk of resonance. Therefore, we propose an elastic hoisting damping structure for IMU vibration damping to solve the above problems. Summary of the Invention
[0004] To address the aforementioned problems, this invention provides an elastic hoisting vibration damping structure for IMU vibration reduction, which solves the problems of weak resistance to severe impacts and limited vibration damping effect of existing vibration damping solutions.
[0005] This invention is achieved through the following solution: an elastic suspended vibration damping structure for IMU vibration reduction, comprising: The outer frame is used to secure the unmanned vehicle. The protective housing has an internal slot for mounting the IMU sensor; Two elastic rope groups are respectively connected between the upper end of the protective shell and the upper end of the outer frame, and between the lower end of the protective shell and the lower end of the outer frame, so as to suspend the protective shell in the middle of the outer frame. Each elastic rope group includes multiple elastic ropes, and the multiple elastic ropes are arranged at intervals along the corresponding edge of the protective shell.
[0006] A further improvement of the elastic hoisting vibration damping structure for IMU vibration reduction in this invention is that the outer frame includes two rectangular frames and four pillars. The two rectangular frames are arranged opposite to each other, and the four pillars are fixedly connected between each pair of opposite corners of the two rectangular frames. The protective shell is a hexahedral structure similar to the outer frame, and the four sides of the upper and lower ends of the protective shell correspond one-to-one with the four sides of the two rectangular frames. Multiple elastic ropes in the elastic rope group are distributed and connected between the four sides of the corresponding ends of the protective shell and the four sides of the corresponding rectangular frames.
[0007] A further improvement of the elastic hoisting vibration damping structure for IMU vibration reduction in this invention is that the number of elastic ropes between each corresponding side of the protective shell and the outer frame is multiple, and the multiple elastic ropes are spaced apart along the length direction of the corresponding side.
[0008] A further improvement of the elastic hoisting damping structure for IMU vibration reduction of the present invention is that each of the elastic ropes is detachably connected to the protective shell and the outer frame.
[0009] A further improvement of the elastic hoisting shock absorption structure for IMU shock absorption of the present invention is that the four sides of the upper and lower ends of the protective shell are evenly provided with a plurality of first connection holes for selective connection of one end of the elastic rope, and the four sides of the two rectangular frames are evenly provided with a plurality of second connection holes for selective connection of the other end of the elastic rope.
[0010] A further improvement of the elastic hoisting vibration damping structure for IMU vibration reduction of the present invention is that the number of the first connecting holes is equal to the number of the elastic ropes, and the number of the second connecting holes is greater than the number of the elastic ropes.
[0011] A further improvement of the elastic hoisting vibration damping structure for IMU vibration reduction in this invention is that the elastic coefficient of the elastic rope is 0.5N / mm-5N / mm.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention installs the IMU sensor inside a protective housing and uses an elastic rope for suspension. The elastic deformation of the rope absorbs vibration energy. Combined with the limiting effect of the multi-point elastic rope, it ensures that the IMU box does not detach under violent impact from an unmanned vehicle, achieving triple protection of shock absorption, resonance prevention, and detachment prevention. Attached Figure Description
[0013] Figure 1 A schematic diagram of the overall structure of the present invention is shown.
[0014] Figure 2 A schematic diagram of the external structure of the protective shell of the present invention is shown.
[0015] Figure 3 A schematic diagram of the location of the receiving groove of the present invention is shown.
[0016] In the diagram: 1. Outer frame; 101. Support column; 102. Rectangular frame; 103. T-shaped block; 2. Protective shell; 201. Cover plate; 202. Shell; 3. Second connecting hole; 4. Elastic rope; 5. IMU sensor; 6. Receiving slot; 7. Fixing ear; 8. First connecting hole. Detailed Implementation
[0017] To address the problems of weak resistance to severe impacts and limited damping effect in existing vibration reduction solutions, this invention provides a flexible hoisting vibration reduction structure for IMUs. The following detailed description, in conjunction with specific embodiments and accompanying drawings, further illustrates this flexible hoisting vibration reduction structure for IMUs.
[0018] See Figures 1-3 As shown, a flexible suspended vibration damping structure for IMU vibration reduction includes: Outer frame 1, used for fixing to the unmanned vehicle; The protective shell 2 has an internal cavity 6 for mounting the IMU sensor 5; Two sets of elastic ropes are connected between the upper end of the protective shell 2 and the upper end of the outer frame 1, and between the lower end of the protective shell 2 and the lower end of the outer frame 1, respectively, so as to suspend the protective shell 2 in the middle of the outer frame 1. Each set of elastic ropes includes multiple elastic ropes 4, and the multiple elastic ropes 4 are arranged at intervals along the corresponding edge of the protective shell 2.
[0019] By installing the IMU sensor 5 inside the protective shell 2 and suspending it with the elastic rope 4, the elastic deformation of the elastic rope 4 is used to absorb vibration energy. Combined with the limiting effect of the multi-point elastic rope 4, it ensures that the IMU box will not be destructively detached when the unmanned vehicle is violently impacted, thus achieving triple protection of shock absorption, resonance prevention, and detachment prevention. The shock absorption structure of this application is simple in structure, low in cost, small in size, and light in weight. It can be adapted to the installation space of various vehicles, is easy to process, and is convenient to maintain.
[0020] The outer frame 1 includes two rectangular frames 102 and four pillars 101. The two rectangular frames 102 are arranged opposite each other, and the four pillars 101 are fixedly connected between each pair of opposite corners of the two rectangular frames 102. The protective shell 2 is a hexahedral structure similar to the outer frame 1 (similar means that the two shapes are the same, but the sizes are not necessarily equal, and the proportions of the corresponding sides of the shapes are equal). The four sides of the upper and lower ends of the protective shell 2 correspond one-to-one with the four sides of the two rectangular frames 102. Multiple elastic ropes 4 in the elastic rope 4 group are distributed between the four sides of the corresponding ends of the protective shell 2 and the four sides of the corresponding rectangular frames 102.
[0021] The number of elastic ropes 4 between each corresponding side in the protective shell 2 and the outer frame 1 is multiple, and the multiple elastic ropes 4 are arranged at intervals along the length direction of the corresponding side.
[0022] For details, please refer to Figure 1As shown, in this embodiment, each rectangular frame 102 includes four connecting posts and four T-blocks 103. The four T-blocks 103 are respectively connected between each pair of adjacent connecting posts so that the four connecting posts enclose a rectangle. The two ends of the support column 101 are respectively connected between two T-blocks 103 arranged opposite to each other in the two rectangular frames 102. The support column 101 and the connecting posts are made of rigid materials, such as aluminum alloy, carbon fiber rods, etc., and their length can be customized according to the installation space. The T-blocks 103 are made of rigid materials, such as engineering plastics, metals, etc., and have three connection ports. Each connection port is provided with a buckle structure for fixing the support column 101 and the connecting post connected to the T-blocks 103. The protective shell 2, with its all-around wrapping elastic ropes 4, ensures uniform force distribution at the connection points. When the unmanned vehicle vibrates, the vibration energy is transmitted to the elastic ropes 4 through the outer frame 1. The elastic ropes 4 undergo elastic deformation (stretching or contracting), converting the vibration energy into elastic potential energy, thereby reducing the transmission of vibration to the protective shell 2 where the IMU sensor 5 is located, achieving shock absorption protection and reducing measurement data drift. Furthermore, the multiple points of cross binding of the elastic ropes 4 form an all-around constraint, while the rigid outer frame 1 limits the maximum displacement range of the protective shell 2. Even in the event of a violent impact, the tension of the elastic ropes 4 and the limiting effect of the rigid structure work together to ensure that the protective shell 2 does not loosen or detach, avoiding destructive damage.
[0023] Each elastic rope 4 is detachably connected to the protective shell 2 and the outer frame 1.
[0024] By adopting a detachable design, if resonance occurs during vibration frequency testing of unmanned vehicles (drones), the natural frequency can be reduced by replacing the elastic rope 4 with one of different elastic coefficients, or by shortening the length of the elastic rope 4 (increasing tension and raising the natural frequency), until the resonance is eliminated, thus preventing resonance from occurring in subsequent use. Furthermore, the shock absorption structure of this application is highly adaptable, and the size of the protective shell 2 and the parameters of the elastic rope 4 can be flexibly customized according to different sizes of IMU sensors 5 and different vibration intensities.
[0025] Among them, the protective shell 2 is provided with a plurality of first connection holes 8 on all four sides at both ends for selective connection of one end of the elastic rope 4, and the two rectangular frames 102 are provided with a plurality of second connection holes 3 on all four sides for selective connection of the other end of the elastic rope 4. The number of first connecting holes 8 is equal to the number of elastic ropes 4, and the number of second connecting holes 3 is greater than the number of elastic ropes 4. By setting a larger number of second connecting holes 3, operators can selectively connect the second connecting holes 3 when binding the elastic ropes 4, which facilitates the suspension and adjustment of the position of the protective shell 2.
[0026] Further, see Figure 3As shown, in this embodiment, the protective shell 2 includes a cover plate 201 and a shell 202. The receiving groove 6 is opened on the shell 202. The cover plate 201 is fixedly connected to the shell 202 by bolts, thereby sealing the receiving groove 6. Multiple fixing ears 7 are evenly fixedly connected to the four sides of the upper end of the cover plate 201 and the four sides of the lower end of the shell 202. Multiple first connecting holes 8 are respectively through the thickness direction of the multiple fixing ears 7. Multiple second connecting holes 3 are opened at intervals along the length direction of the connecting post. One end of the elastic rope 4 is tied to the first connecting hole 8 and the other end is tied to the second connecting hole 3. The protective shell 2 is made of a lightweight rigid material, such as ABS engineering plastic or aluminum alloy. The above-mentioned binding design facilitates the assembly and disassembly of the elastic rope 4.
[0027] The elastic coefficient of the elastic rope 4 is 0.5 N / mm-5 N / mm.
[0028] By adopting the above design, during test flights, this application can adapt to unmanned vehicles by replacing the elastic rope 4 with different elastic coefficients. Depending on the actual vibration frequency of the vehicle, different elastic coefficients of the elastic rope 4 can be used (e.g., a smaller elastic coefficient is selected for higher vibration frequencies, and a larger elastic coefficient is selected for lower vibration frequencies). This ensures that the natural frequency of the elastic rope 4 avoids the vibration frequency of the vehicle, preventing resonance. Alternatively, the tension of the elastic rope 4 can be changed by adjusting its length—greater tension results in stronger rigidity and a higher natural frequency; lower tension results in greater flexibility and a lower natural frequency, thus achieving dynamic adjustment of the resonance frequency.
[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0030] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.
Claims
1. A flexible hoisting vibration damping structure for IMU vibration reduction, characterized in that, include: The outer frame is used to secure the unmanned vehicle. The protective housing has an internal slot for mounting the IMU sensor; Two elastic rope groups are respectively connected between the upper end of the protective shell and the upper end of the outer frame, and between the lower end of the protective shell and the lower end of the outer frame, so as to suspend the protective shell in the middle of the outer frame. Each elastic rope group includes multiple elastic ropes, and the multiple elastic ropes are arranged at intervals along the corresponding edge of the protective shell.
2. The elastic suspension vibration damping structure for IMU vibration damping as described in claim 1, characterized in that, The outer frame includes two rectangular frames and four pillars. The two rectangular frames are arranged opposite each other, and the four pillars are fixedly connected between each pair of opposite corners of the two rectangular frames. The protective shell is a hexahedral structure similar to the outer frame, and the four sides of the upper and lower ends of the protective shell correspond one-to-one with the four sides of the two rectangular frames. Multiple elastic ropes in the elastic rope group are distributed and connected between the four sides of the corresponding ends of the protective shell and the four sides of the corresponding rectangular frames.
3. The elastic suspension vibration damping structure for IMU vibration damping as described in claim 2, characterized in that, The protective shell and the outer frame each have multiple elastic ropes between each corresponding side, and these multiple elastic ropes are spaced apart along the length of the corresponding side.
4. The elastic suspension vibration damping structure for IMU vibration damping as described in claim 3, characterized in that, Each of the aforementioned elastic cords is detachably attached to the protective shell and outer frame.
5. The elastic suspension vibration damping structure for IMU vibration damping as described in claim 4, characterized in that, The protective shell has multiple first connection holes evenly distributed on all four sides at both ends for selectively connecting one end of the elastic rope, and the two rectangular frames have multiple second connection holes evenly distributed on all four sides for selectively connecting the other end of the elastic rope.
6. The elastic suspension vibration damping structure for IMU vibration damping as described in claim 5, characterized in that, The number of the first connecting holes is equal to the number of the elastic ropes, and the number of the second connecting holes is greater than the number of the elastic ropes.
7. The elastic suspension vibration damping structure for IMU vibration damping as described in claim 1, characterized in that, The elastic coefficient of the elastic rope is 0.5 N / mm to 5 N / mm.