Self-adaptive vibration reduction support based on vision measurement technology

Abstract

The invention relates to a self-adaptive vibration reduction support for a vision measurement system. The vibration reduction support comprises a lower base and an upper supporting plate and is used for placing vision measurement equipment and a filtering device. A loading shock isolation assembly is arranged in the middle of the vibration reduction support, and the three-direction vibration isolation design is achieved through the synergistic effect of the evenly-distributed vertical main spiral springs and the quasi-zero stiffness shock isolation device. According to the shock isolation device, a horizontal rigid supporting base forms transverse constraint on a bistable beam, fastening connection is achieved through screw rod design, and the quasi-zero stiffness characteristic is jointly formed through the horizontal rigid supporting base and a lower auxiliary spiral spring. A special bistable beam elastic structure is designed, so that a bearing effect is provided for upper equipment, and a constant three-way vibration isolation effect can be kept under different frequencies. And the upper digital filtering device is used for further processing high-frequency noise and ensuring the measurement precision and stability of the vision measurement system. According to the self-adaptive vibration reduction support, digital filtering and physical vibration isolation are fused, and a complete set of method for improving the vision measurement precision is achieved.

Description

Technical Field

[0001] The present invention relates to an adaptive vibration damping support, and in particular to an adaptive vibration damping support for a visual measurement system. Combining digital filtering and physical vibration isolation technology, a vibration damping support is developed that can automatically adapt to different vibration environments, thereby improving the measurement accuracy and stability of the visual measurement system, and providing a complete set of methods for measuring the vibration spectrum characteristics of its working scene. Background Art

[0002] Visual measurement technology based on machine vision captures the image of the target object through a camera or optical sensor, and uses image processing algorithms to extract information and perform measurement analysis. This technology integrates optoelectronics, computer technology, laser technology and image processing technology to form an integrated measurement system that integrates optics, mechanics, electronics and computing. Its non-contact, full field of view, high precision and high automation enable it to achieve intelligent, digital, miniaturized, networked and multifunctional detection. Visual measurement technology performs well in online detection, dynamic detection, real-time analysis and control. With its high efficiency, high precision and non-destructive characteristics, it is widely used in industrial production, scientific research and automated detection, significantly improving the accuracy and reliability of measurement.

[0003] However, visual measurement systems are often affected by interference such as environmental vibration in practical applications. These interferences can cause slight changes in the position of the camera or sensor, resulting in blurred or distorted images, affecting the quality of image capture. In addition, vibrations may also cause sensor jitter, resulting in unstable input data for image processing algorithms, increasing noise and errors. These factors work together to significantly reduce the accuracy and reliability of measurement results, thereby affecting overall work efficiency and detection results. Therefore, how to effectively reduce or eliminate the impact of environmental vibrations has become the key to improving the performance of visual measurement systems.

[0004] At present, improving measurement accuracy and stability mainly includes physical vibration isolation and digital filtering. Physical vibration isolation reduces the transmission of vibration through mechanical structure design, while digital filtering uses algorithms to process the collected data to eliminate vibration noise. However, both methods have their limitations. Physical vibration isolation is effective in dealing with low-frequency vibrations, but it is not effective for high-frequency vibrations. On the contrary, digital filtering has advantages in dealing with high-frequency vibrations, but its ability to suppress low-frequency vibrations is limited. Therefore, a single vibration reduction method cannot effectively deal with high-frequency and low-frequency vibration interference at the same time. In this context, a vibration reduction support that can be adaptively adjusted is developed. By combining digital filtering and physical vibration isolation technology, effective vibration reduction measures are provided for vibration interference of different frequencies, so that it can still maintain high performance under more complex and harsh environmental conditions. Summary of the invention

[0005] The purpose of the present invention is to provide an adaptive vibration reduction support, which can combine digital filtering and physical vibration isolation technology to automatically adapt to different vibration environments, thereby improving the measurement accuracy and stability of a visual measurement system.

[0006] The present invention is realized by the following technical scheme: The present invention proposes an adaptive vibration reduction bearing. The device is mainly composed of an upper support plate, a lower base, a coil spring and a plurality of quasi-zero stiffness seismic isolation devices composed of bistable beams. The core of the whole device is the quasi-zero stiffness seismic isolation device, which is installed between the upper support plate and the lower base and supported at the bottom by an inclined support. A plurality of seismic isolation devices are evenly distributed on the lower horizontal support.

[0007] Furthermore, multiple main coil springs are evenly distributed between the lower base and the upper support plate. These coil springs not only provide the necessary elastic support, but also effectively absorb and buffer external vibrations, further improving the vibration reduction performance of the device. Through the coordinated cooperation of these components, the device achieves overall stability and operability, ensuring that it can operate stably in various vibration environments and provide reliable vibration reduction effects.

[0008] Furthermore, a plurality of formed fixing bolt holes are evenly distributed on the lower base, which are used to fix the inclined pad required for the vibration reduction device and support the entire device.

[0009] Furthermore, the inclined pad is composed of a base plate and an inclined plate, which are connected by welding or bolts to form a structure that provides support at a specific angle. Four formed fixing bolt holes are provided around the base plate to fix the inclined pad to the lower base. The inclined plate is fixed by the bolt holes to support the quasi-zero stiffness seismic isolation device.

[0010] Furthermore, the quasi-zero stiffness seismic isolation device is composed of two horizontal rigid support bases, a bistable beam, and a clamping and supporting mechanism in between.

[0011] Furthermore, the above-mentioned horizontal support bases are placed in parallel, and the parallel distance can be adjusted according to needs. The base is provided with a formed bolt hole for fixing the entire device on the inclined pad to achieve three-way vibration isolation. A rectangular notch perpendicular to the support base is dug inside the parallel base to form a fixed support for the bistable beam.

[0012] Furthermore, the bistable beam is made of a metal steel structure or a plastic material, and its two ends are fixed between vertical brackets by bolts and nuts. Tie rods or fasteners are provided on both sides for applying or adjusting the clamping force.

[0013] Furthermore, a sleeve is provided under the bistable beam to precisely install an auxiliary coil spring, which is combined with the bistable beam to form a quasi-zero stiffness seismic isolation device.

[0014] Furthermore, the upper end of the bistable beam is connected to the upper support plate through a support member to form a seismic isolation force transmission path. The support member is reinforced with the bistable beam through bolts and clamps, and the height of the seismic isolation support is reasonably adjusted according to the design of the support member as needed.

[0015] Furthermore, the upper support plate is provided with rectangularly arranged molded fixing bolt holes for fixing and supporting the visual measuring instrument and the filtering device to capture the image of the target object, and perform information extraction and measurement analysis through the image processing algorithm, while using the filtering device to process high-frequency interference vibrations.

[0016] Furthermore, the filtering processing technology adopts an IIR (Infinite Impulse Response) low-pass filter, and the filter coefficients are designed to ensure effective isolation of high-frequency interference.

[0017] The present invention proposes a fusion of physical vibration isolation and digital filtering technology to achieve efficient and comprehensive vibration reduction effects in the full frequency band. The quasi-zero stiffness vibration isolation device designed with a bistable beam and auxiliary coil spring provides excellent low-frequency vibration isolation capabilities, while the IIR low-pass filter can effectively suppress high-frequency vibration noise, ensuring the stability and accuracy of the visual measurement system in various frequency vibration environments.

[0018] The upper support plate of the present invention is provided with formed fixing bolt holes, which can stably install the visual measuring instrument and the filter device. The three-way isolation support can avoid slight changes in the position of the camera or sensor, reduce image blur and distortion, and thus improve the image capture quality and the accuracy of the measurement results.

[0019] The quasi-zero stiffness vibration isolation device of the present invention adopts a combination design of a bistable beam and an auxiliary coil spring. The bistable beam can provide a negative stiffness area, which is combined with the positive stiffness of the auxiliary coil spring to form a quasi-zero stiffness characteristic. It can efficiently dissipate energy during vibration, improve vibration reduction performance, and is suitable for complex vibration environments. The bistable beam and spring can be made of metal, composite materials or high-performance polymers to achieve different stiffness and elastic properties to adapt to different working environments and load requirements.

[0020] The three quasi-zero stiffness isolation supports designed in the present invention are evenly distributed in an equilateral triangle on the lower base. Through the cooperation of the inclined plate structure and the horizontal rigid support base, the device can accurately adjust the angle and height to achieve the full range of XYZ three-axis isolation effect. The main coil spring is vertically installed at the center of the outer side of the isolation support, providing additional support while improving the isolation performance in the Z-axis direction. This design ensures that the system can achieve efficient full range of isolation in a complex vibration environment.

[0021] The quasi-zero stiffness seismic isolation device of the present invention has significant advantages in the process of force transmission through the fixing design of horizontal slots, screws and nuts. It can effectively disperse and evenly distribute the force from the upper support plate, and provide a fixed support for the bistable beam, thereby enhancing the overall stiffness and seismic resistance of the device. Even in a large vibration environment, it can prevent the device from tilting or collapsing, ensuring the safe operation of the system.

[0022] The supporting member of the present invention is firmly connected to the bistable beam through bolts and clamps. The height of the supporting member is designed according to needs so as to reasonably adjust the height of the vibration isolation support, providing flexible structural adjustment capability.

[0023] The various parts of the present invention are mostly connected by bolts, which is easy to install and fix. The design of the quasi-zero stiffness vibration isolation device and the inclined support makes the height and angle of the device adjustable, ensuring the best vibration reduction effect, and is suitable for rapid deployment and adjustment in different scenarios.

[0024] The material cost of the present invention is low, the structure is simple, and it is easy to install and maintain. Each component can be realized by standardized factory machining or 3D printing technology, the material and specification can be selected and adjusted according to different load requirements, the manufacturing process is simple, and it has high practicality and adaptability.

[0025] The present invention combines vibration isolation, computer and image processing technology to create an integrated comprehensive measurement system. It has the characteristics of non-contact, full field of view, high precision and automation, which significantly improves the accuracy and reliability of measurement. Therefore, it has broad application prospects in industrial production, scientific research, automated detection and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention (excluding the upper sealing plate); Figure 3 It is a schematic diagram of the top view of the structure of the present invention (excluding the upper sealing plate); Figure 4 It is a schematic diagram of the main structure of the present invention; Figure 5 It is a general schematic diagram of the quasi-zero stiffness shock absorbing device of the present invention; Figure 6 It is a schematic diagram of the front view structure of the quasi-zero stiffness shock absorbing device of the present invention; Figure 7 It is a general schematic diagram and a main structural schematic diagram of the bistable beam structure of the present invention; Figure 8 It is a schematic diagram of the detailed components of the shock absorbing device of the present invention; Fig. 9 It is a schematic diagram of the inclined pad of the present invention; Fig.10 It is a schematic diagram of the lower base of the present invention; Fig.11 It is a schematic diagram of the upper support plate of the present invention; Fig.12 A detailed diagram of the upper support plate of the present invention; Fig.13 It is a schematic diagram of the quasi-zero stiffness restoring force curve of the present invention.

[0027] The following are the descriptions of the reference numerals: 1. Lower base; 2. Upper support plate; 3. Bottom plate; 4. Inclined plate; 5. Bolt hole; 6. Horizontal rigid support base; 7. Horizontal notch; 8. Auxiliary coil spring; 9. Bistable beam; 10. Screw; 11. Support member; 12. Main coil spring; 13. Bolt; 14. Sleeve. The same reference numerals are used to indicate the same parts. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] like Figure 1-12 As shown, an adaptive three-way vibration reduction bearing is composed of a lower base 1, an upper support plate 2, three quasi-zero stiffness vibration isolation devices (composed of components 3, 4, 6, 7, 8, 9, 10, 11, 13, 14) and a main coil spring 12. The lower base 1 is a circular bottom plate made of steel, provided with 12 fixedly formed bolt holes 5, which are connected to the bottom plate 4 of the vibration isolation device by bolts to ensure that the device is firmly fixed on the lower base. In addition, a plurality of guide holes are provided for accurately fixing and positioning the main coil spring to improve the stability and accuracy of the overall installation.

[0030] The upper support plate 2 is made of the same material as the lower base 1 and is placed in parallel. It is provided with bolt holes arranged in a matrix for fixing and supporting the upper machine vision measuring instrument and digital filter, and can adjust the instrument to a suitable position.

[0031] The main coil spring 12 is connected to the lower base and the upper support plate by welding, which can provide effective support and buffering when vibration occurs. The various parts of the device are tightly connected by bolts and nuts to form a stable and adjustable vibration reduction platform.

[0032] like Figure 5-9As shown, the quasi-zero stiffness vibration isolation device is composed of parallel horizontal rigid support bases 6 as the main load-bearing components, and a bistable beam 9 as the main vibration isolation element. The upper inner side thereof is slotted to form a mounting hole and a horizontal notch 7 for placing and fixing the bistable beam 9 to provide certain lateral support. The bistable beam 9 is fastened to the horizontal rigid support base 6 by a screw 10 and a nut 13 to provide stability and support force.

[0033] The auxiliary coil spring 8 is precisely placed at the bottom of the bistable beam 9 through a sleeve, and is combined with the bistable beam 9 to form a quasi-zero stiffness feature. The bistable beam 9 is fixedly connected to the upper support plate 2 through a support member 11 to achieve an effective force transmission mechanism. The three quasi-zero stiffness vibration isolation devices are vertically fixed to the inclined plate 4 by bolts, which are used to accurately adjust the angle and height, thereby achieving the three-way seismic isolation target.

[0034] The specific design method of the above-mentioned bistable beam 9 and the attached helical spring to achieve the quasi-zero stiffness characteristic is as follows: The restoring force form of the bistable beam can be simplified as: Fn=-ks(xx%)+β(xx)³ Where Fbeam is the restoring force of the bistable beam 9, kbeam is the linear stiffness coefficient, β is the nonlinear stiffness coefficient, x is the vertical displacement, and x0 is the equilibrium position.

[0035] The restoring force expression of the attached coil spring is: Fping=kmingx where Fpring is the restoring force of the attached spring, kspring is the linear stiffness coefficient, and x is the vertical displacement.

[0036] like Fig.13 As shown, the bistable beam 9 provides negative stiffness in the region between the two stable positions, and the force applied is opposite to the displacement direction. The auxiliary spring provides positive stiffness, and the restoring force is linearly related to the displacement. By combining the bistable beam and the linear spring, a quasi-zero stiffness characteristic can be achieved within a certain displacement range, thereby providing excellent seismic isolation performance.

[0037] When the environment vibrates, the vibration is transmitted to the intermediate member through the lower base 1, causing the lower base 1 and the upper support plate 2 to be compressed, thereby generating vertical pressure. Since the bistable beam 9 is laterally fixed by the horizontal notch 7 and the screw 10 and the nut 13, its deformation generates a nonlinear restoring force, which is combined with the linear stiffness of the auxiliary coil spring 8 to achieve a quasi-zero stiffness characteristic. This design not only effectively dissipates energy, but also provides additional structural stability to prevent the device from tilting or collapsing due to excessive vibration. In addition, the main coil spring 12 absorbs vibration energy through elastic deformation, reducing the intensity of vibration transmitted to the upper support plate.

[0038] The above-mentioned embodiments are only descriptions of the preferred implementation methods of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention. The technical content of the present invention has been fully recorded in the claims.

Claims

1. An adaptive vibration damping bearing, characterized in that: It includes a lower base, an upper support plate, a coil spring and a plurality of quasi-zero stiffness seismic isolation devices composed of bistable beams. The quasi-zero stiffness seismic isolation devices are installed between the upper support plate and the lower base and supported at the bottom by an inclined pad. A plurality of quasi-zero stiffness seismic isolation devices are evenly distributed on the lower horizontal support base, and a plurality of main coil springs are evenly distributed between the lower base and the upper support plate.

2. The adaptive vibration damping bearing according to claim 1, characterized in that: The lower base is provided with a plurality of evenly arranged formed fixing bolt holes for fixing the inclined pad required for the vibration reduction device and supporting the entire device.

3. The adaptive vibration damping bearing according to claim 1, characterized in that: The main coil spring is used to connect the lower base and the upper support plate to provide effective support and buffering when vibration occurs. Multiple main coil springs are evenly distributed between the lower base and the upper support plate, further improving the vibration reduction performance of the device.

4. The adaptive vibration damping bearing according to claim 1, characterized in that: The inclined pad is composed of a base plate and an inclined plate, which are connected by welding or bolts. Four formed fixing bolt holes are arranged around the base plate to fix the inclined pad to the lower base. The inclined plate is fixed through the bolt holes to support the quasi-zero stiffness seismic isolation device.

5. The adaptive vibration damping bearing according to claim 1, characterized in that: The quasi-zero stiffness seismic isolation device is composed of two horizontal rigid support bases, a bistable beam and a clamping and supporting mechanism in the middle.

6. The adaptive vibration damping bearing according to claim 5, characterized in that: The horizontal support bases are placed in parallel, and the parallel distance can be adjusted according to needs. The bases are provided with formed bolt holes for fixing the entire device on the inclined pad to achieve three-way vibration isolation. The inner side of the parallel base is dug with a rectangular notch perpendicular to the support base to form a fixed support for the bistable beam.

7. The adaptive vibration damping bearing according to claim 5, characterized in that: The bistable beam is made of a metal steel structure or a plastic material, and its two ends are fixed between vertical supports by bolts and nuts. Tie rods or fasteners are provided on both sides for applying or adjusting the clamping force. An auxiliary coil spring is provided under the component, which is combined with the bistable beam to form a quasi-zero stiffness seismic isolation device.

8. The adaptive vibration damping bearing according to claim 5, characterized in that: The upper end of the bistable beam is connected to the upper support plate through a support member to form a seismic isolation force transmission path. The support member is firmly connected to the bistable beam through bolts and clamps, and the height of the support member can be adjusted as needed, thereby reasonably adjusting the height of the vibration isolation support, providing flexible structural adjustment capabilities.

9. The adaptive vibration damping bearing according to claim 1, characterized in that: The upper support plate is provided with rectangularly arranged shaped fixing bolt holes for fixing and supporting the visual measuring instrument and the filtering device to capture the image of the target object, and perform information extraction and measurement analysis through the image processing algorithm, while using the filtering device to process high-frequency interference vibration.

10. The adaptive vibration damping bearing according to claim 9, characterized in that: The filtering processing technology adopts an IIR (Infinite Impulse Response) low-pass filter, and effectively isolates high-frequency interference by selecting filter coefficients.

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