CN219284458U - Vibration isolation device in visual vibration amplification and analysis application - Google Patents
Vibration isolation device in visual vibration amplification and analysis application Download PDFInfo
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- CN219284458U CN219284458U CN202222895803.0U CN202222895803U CN219284458U CN 219284458 U CN219284458 U CN 219284458U CN 202222895803 U CN202222895803 U CN 202222895803U CN 219284458 U CN219284458 U CN 219284458U
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Abstract
The utility model belongs to the technical field of visual vibration isolation, and discloses a vibration isolation device in visual vibration amplification and analysis application. The shielding device is formed by splicing five organic glass plates or glass plates with high light transmittance, and the shielding device is a cuboid with a hollowed bottom. The reference target is provided with one, and is fixed on the inner surface of the high-transmittance organic glass plate or glass plate through adsorption or adhesion. The reference target is circular, a circular through hole is formed in the middle of the reference target, and the whole reference target is coated with a black color layer. And selecting a reference point target in the video picture frame, so that vibration frequency points caused by wind disturbance can be conveniently distinguished in vibration spectrum analysis, and the reliability of visual vibration analysis of an object to be detected can be evaluated.
Description
Technical Field
The utility model belongs to the technical field of visual vibration isolation, and particularly relates to a vibration isolation device in visual vibration amplification and analysis application.
Background
At present, a visual vibration amplification and analysis technology is a technology for amplifying the small variation amplitude of an object to be detected in a video, and the technology amplifies a weak vibration signal of the object to be detected in the video to an amplitude which can be perceived by naked eyes. Fig. 1 gives an example of a minute movement magnification that reflects the effect of visual enhancement by processing minute movement changes that are difficult to capture by a common image pickup apparatus, thereby facilitating observation. The amplified video is subjected to time domain and frequency domain analysis on the region of interest of the object to be measured, and the amplitude, the frequency and the phase of the amplified video are measured and analyzed, so that the method can be widely applied to various fields needing vibration measurement, such as: fans, bridges, transmission towers, large buildings, etc. Compared to contact vibration sensors, visual vibration amplification and analysis techniques have the advantage that they are non-contact, multiple measurement areas, equipment and construction costs can be set in the video.
When video and measurement are taken on bridges, fans, power towers, large buildings and the like, wind is a main cause of weak vibration, but imaging equipment for taking the video, such as a mobile phone or a camera arranged on a tripod, is inevitably disturbed by wind, so that the frame of the taken video is slightly vibrated, and the additional vibration caused by wind load is difficult to identify and reject in visual vibration amplification and analysis, and the measurement precision and applicability of a visual vibration amplification and analysis system are affected.
Through the above analysis, the problems and defects existing in the prior art are as follows: when the existing device shoots videos and measures the large-scale building, the disturbance of shooting equipment of the tripod caused by natural environment causes micro vibration of the shot video, so that the additional vibration caused by wind load is difficult to identify and reject in the visual vibration amplification and analysis, and the measurement precision and applicability of the visual vibration amplification and analysis system are affected.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides a vibration isolation device in the application of amplifying and analyzing visual vibration.
The utility model is realized in that a vibration isolation device for use in visual vibration amplification and analysis applications comprises:
a fixed base;
the upper end of the fixed base is fixed with a shielding device, a reference device is fixed in the middle of the shielding device, the shielding device is an organic glass plate or a glass plate with high light transmittance, the reference device is a reference point target, and the fixed base is a rubber base.
Further, the shielding device is formed by splicing five organic glass plates or glass plates with high light transmittance, and the shielding device is a cuboid with hollowed bottom.
Further, rubber bases are fixed at the joints of the adjacent high-light-transmittance organic glass plates or glass plates at the bottoms of the shielding devices, the rubber bases are fixedly connected with the organic glass plates in a bolt connection mode, and the four rubber bases are arranged.
Further, the reference point target is provided with one, and is fixed on the inner surface of the high-transmittance organic glass plate or the glass plate through adsorption or adhesion.
Further, the reference point target is circular, and a circular through hole is formed in the middle of the reference point target.
Further, the reference point target is coated with a black color layer.
In combination with the above technical solution and the technical problems to be solved, please analyze the following aspects to provide the following advantages and positive effects:
first, aiming at the technical problems in the prior art and the difficulty in solving the problems, the technical problems solved by the technical proposal of the utility model are analyzed in detail and deeply by tightly combining the technical proposal to be protected, the results and data in the research and development process, and the like, and some technical effects brought after the problems are solved have creative technical effects. The specific description is as follows:
according to the embodiment of the utility model, the four rubber bases are arranged to provide a stable supporting point for the wind disturbance blocking device; the reference point target provides a stable reference point for shooting the video, and can select 1 measuring area as the reference point target in the video picture frame during visual vibration amplification and analysis, and provide references for other measuring areas, so that vibration frequency points caused by wind disturbance can be distinguished in vibration spectrum analysis, and the reliability of visual vibration analysis of an object to be detected can be evaluated.
Secondly, the technical scheme is regarded as a whole or from the perspective of products, and the technical scheme to be protected has the following technical effects and advantages:
the embodiment of the utility model has simple structure and obvious effect, the wind is blocked by the simple high-light-transmittance organic glass plate or glass plate, the vibration of shooting equipment is avoided, and the rubber base is fixed at the bottom of the high-light-transmittance organic glass plate or glass plate to provide stability for the whole device.
Thirdly, as inventive supplementary evidence of the claims of the present utility model, the following important aspects are also presented:
the technical scheme of the utility model solves the technical problems that people are always desirous of solving but are not successful all the time:
the technical scheme of the utility model solves the problem that the visual acquisition equipment is easy to be disturbed by wind in the visual vibration amplification and analysis application. In general, only in the case of wind excitation, the object to be measured, such as: large buildings, vibration does occur, but for vision acquisition devices such as: the combination of the camera and the tripod can be disturbed to generate vibration if the combination is completely exposed to the external environment, so that the visual vibration amplifying and analyzing system cannot distinguish whether the vibration of the object to be detected or the vibration of the camera. By using the vibration isolation device, the visual acquisition equipment is not disturbed by external wind due to the high transparent closed environment, so that the visual acquisition equipment can shoot videos under the condition of avoiding vibration, and the visual vibration amplification and analysis has better applicability and can obtain higher measurement precision.
Drawings
Fig. 1 is a schematic structural diagram of a vibration isolation device in visual vibration amplification and analysis application provided by an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a reference point target structure provided by an embodiment of the present utility model;
fig. 3 is a schematic diagram of vibration spectrum of an undelivered vibration isolation device according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of a vibration spectrum of an erection vibration isolation device according to an embodiment of the present utility model;
in the figure: 1. a rubber base; 2. a shielding device; 3. a reference point target.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
1. The embodiments are explained. In order to fully understand how the utility model may be embodied by those skilled in the art, this section is an illustrative embodiment in which the claims are presented for purposes of illustration.
As shown in fig. 1-2, the vibration isolation device for amplifying and analyzing visual vibration provided in the embodiment of the present utility model includes: a rubber base 1, a shielding device 2 and a reference point target 3.
The upper end of the fixed base is fixed with a shielding device 2, a reference device is fixed in the middle of the shielding device 2, the shielding device 2 is a high-light-transmittance organic glass plate or glass plate, the reference device is a reference point target 3, and the fixed base is a rubber base 1.
The shielding device 2 is formed by splicing five organic glass plates or glass plates with high light transmittance, and the shielding device 2 is a cuboid with a hollowed bottom.
The rubber base 1 is fixed at the junction of the two adjacent high-transmittance organic glass plates or glass plates at the bottom of the shielding device 2, and the rubber base 1 is provided with four. The rubber base 1 is fixedly connected with the organic glass plate by using a bolt connection mode.
The reference point target 3 is provided with one, fixed on the inside surface of a high light transmittance plexiglass plate or glass plate by adsorption or adhesion.
The reference point target 3 is circular, and a circular through hole is arranged in the middle.
The reference point target 3 is coated with a black color layer.
When the embodiment of the utility model is used, after the tripod for recording the video and the mobile phone or the camera are adjusted, the tripod is covered by the wind blocking disturbance device, the placement position is adjusted to enable the four rubber bases 1 to fully contact the ground, then the reference point targets 3 are adsorbed or bonded on an organic glass plate or a glass plate with high light transmittance, so that the reference point targets appear in the video picture without shielding an object to be detected, and finally the Bluetooth remote controller is used for controlling to start or stop recording the video.
2. Application example. In order to prove the inventive and technical value of the technical solution of the present utility model, this section is an application example on specific products or related technologies of the claim technical solution.
The embodiment of the utility model is applied to the tiny change amplitude of the object to be detected in the amplified video. For large buildings, such as: in visual vibration amplification and analysis application of the power transmission tower, the power transmission tower can vibrate under wind excitation, but the vibration amplitude is tiny, and the vibration amplitude at the top of the power transmission tower is only in the centimeter level. The natural frequency is an important index of structural health of the power transmission tower, and the multi-order natural frequency of the power transmission tower can be obtained by measuring the vibration signal of the power transmission tower under wind excitation, so that the structural health condition of the power transmission tower is evaluated. If the video acquisition device is to be such as: the mobile phone and the tripod are exposed to natural environment, wind disturbance of the mobile phone and the tripod can cause vibration of the mobile phone and the tripod, so that the effect and the accuracy of visual vibration amplification and analysis are reduced, and even the situation that the vibration of the power transmission tower cannot be distinguished occurs.
After the vibration isolation device is erected, the video acquisition equipment of the mobile phone and the tripod is positioned in a high transparent closed space, external wind can only excite the power transmission tower and can not interfere the video acquisition equipment, so that the photographed video has higher signal-to-noise ratio in the visual vibration amplification and analysis, and the accuracy and the confidence of acquiring the natural frequency of the power transmission tower are greatly improved.
3. Evidence of the effect of the examples. The embodiment of the utility model has a great advantage in the research and development or use process, and has the following description in combination with data, charts and the like of the test process.
In the application of visual vibration amplification and analysis of 110kV power transmission towers, as shown in fig. 3 and 4, since the region of interest is positioned at the end part of the power transmission tower top, the region of interest is far away from the camera equipment, and the vibration amplitude is only in the centimeter level, the vibration isolation device is not erected and the vibration isolation device is erected, and the application of visual vibration amplification and analysis is very important. In order to verify the effect of erecting the vibration isolation device, the top with the largest vibration amplitude of the power transmission tower is selected as a measuring area, a target of the vibration isolation device is not selected as a reference area, and the bottom with small vibration amplitude is selected as the reference area.
Shooting by using a tripod and a mobile phone under the two conditions of not erecting a vibration isolation device and erecting the vibration isolation device, and respectively carrying out visual vibration amplification and spectrum analysis on the video acquired by the tripod and the mobile phone. From the following figures, it can be seen that:
as shown in fig. 3, in the visual vibration amplification and spectrum analysis of the non-erected vibration isolation device, the time domain vibration signals of the measurement area and the reference area are in the same vibration amplitude range, which means that the vibration noise generated by the wind disturbance of the video shooting device floods the vibration signal of the power transmission tower, and meanwhile, the frequency spectrums of the measurement area and the reference area are the same amplitude in the frequency spectrums, so that the natural frequency point of the power transmission tower is difficult to distinguish and determine.
As shown in fig. 4, in the visual vibration amplification and spectrum analysis of the vibration isolation device, the time domain signal amplitude of the measurement area is far greater than the time domain vibration noise of the reference area, which indicates that the vibration isolation device effectively shields the disturbance of wind to the shooting equipment (mobile phone+tripod), reduces the noise to the maximum extent and improves the signal to noise ratio; meanwhile, in the frequency spectrum, in the natural frequency ranges of the first order and the second order of the power transmission tower of 110kV from 2.5Hz to 5Hz, the frequency spectrum of the measurement area has higher peak values, and the frequency spectrum of the reference area has no peak value, so that the first order natural frequency and the second order natural frequency of the power transmission tower of 110kV can be considered to be respectively as follows with the maximum confidence degree: 2.89Hz and 4.74Hz.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present utility model will be apparent to those skilled in the art within the scope of the present utility model.
Claims (6)
1. A vibration isolation apparatus for use in a visual vibration amplification and analysis application, the vibration isolation apparatus comprising:
a fixed base;
the upper end of the fixed base is fixed with a shielding device, a reference device is fixed in the middle of the shielding device, the shielding device is an organic glass plate or a glass plate with high light transmittance, the reference device is a reference point target, the fixed base is a rubber base, and the rubber base is fixedly connected with the organic glass plate in a bolt connection mode.
2. The vibration isolator for visual vibration amplification and analysis applications according to claim 1, wherein the shielding device is formed by splicing five high-transmittance organic glass plates or glass plates, and the shielding device is a cuboid with a hollowed bottom.
3. Vibration isolation device for visual vibration amplification and analysis applications according to claim 1, wherein the bottom of the shielding device is provided with four rubber mounts fixed adjacent to each other at the junction of the high light transmittance plexiglas or glass plates.
4. Vibration isolation device for visual vibration amplification and analysis applications according to claim 1, wherein the reference point target is provided with one, fixed by adsorption or adhesion to a high light transmittance plexiglass plate or glass plate inner surface.
5. Vibration isolation device for visual vibration amplification and analysis applications according to claim 1, wherein the reference point target is circular, with a circular through hole in the middle.
6. The vibration isolation device of claim 1, wherein the reference point target is coated with a black color layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222895803.0U CN219284458U (en) | 2022-11-01 | 2022-11-01 | Vibration isolation device in visual vibration amplification and analysis application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222895803.0U CN219284458U (en) | 2022-11-01 | 2022-11-01 | Vibration isolation device in visual vibration amplification and analysis application |
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| Publication Number | Publication Date |
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| CN219284458U true CN219284458U (en) | 2023-06-30 |
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| CN202222895803.0U Active CN219284458U (en) | 2022-11-01 | 2022-11-01 | Vibration isolation device in visual vibration amplification and analysis application |
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- 2022-11-01 CN CN202222895803.0U patent/CN219284458U/en active Active
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