A weak vibration signal amplification device based on biomimetic vision

Abstract

The application relates to a weak vibration signal amplification device based on bionic vision, which is used for capturing and amplifying the vibration signals of a vibrating object and comprises a laser light source arranged on the vibrating object, a vibration signal amplification and capturing module, a vibration signal receiving module and a vibration signal analysis module, the vibration signal amplification and capturing module and the vibration signal receiving module are respectively arranged on opposite sides of the vibrating object, and the vibration signal amplification and capturing module is connected with the vibration signal analysis module. Compared with the prior art, the application has the advantages of micro-vibration measurement, low equipment cost and the like, and solves the defects that the traditional contact type vibration measurement is difficult to measure small-amplitude equipment and has high measurement operation difficulty.

Description

Technical Field

[0001] This invention relates to the field of measuring instrument technology, and in particular to a weak vibration signal amplification device based on bionic vision. Background Technology

[0002] Vibration monitoring technology is an important equipment condition monitoring technology. It is based on the vibration state parameters during equipment operation, combined with fault and algorithm diagnosis methods, and has been widely used in product manufacturing, electromechanical engineering, geological monitoring and other fields.

[0003] Currently, common methods for vibration signal sensing and acquisition are mainly divided into electrical measurement methods, mechanical measurement methods, and optical measurement methods. Electrical measurement methods require sensors to convert mechanical signals into electrical signals, which are then processed to obtain the vibration signal. Electrical vibration measurement often requires direct contact with the object being measured and the attachment of numerous sensors to the surface, limiting its practicality in engineering implementation and its ability to detect weak vibrations. With the development of sensing technology, non-contact measurement technologies are becoming increasingly diverse, primarily based on photoelectric, electromagnetic, and ultrasonic technologies. However, these are often limited by the distance and cost constraints of non-contact methods and are not suitable for vibration measurement scenarios involving electrical equipment or large-area equipment.

[0004] Bionic machine vision technology is a novel video image perception technology that captures video stream signals from the real environment through optical lenses and processes these signals using bionic machine vision sensors. Unlike the RGB sensors of traditional cameras, bionic machine vision sensors are highly sensitive to color changes in individual pixels. Furthermore, the movement of objects in the video stream causes color changes in individual pixels, thus enabling the technology to detect subtle movements and achieve vibration measurement. At the same time, bionic machine vision sensors are inexpensive, making them economical. However, limited by factors such as the pixel count of the bionic machine vision sensor itself, its sensitivity to subtle vibrations is insufficient. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a weak vibration signal amplification device based on bionic vision. This invention has the advantages of micro-vibration measurement and low equipment cost, and solves the shortcomings of traditional contact vibration measurement, such as difficulty in measuring small amplitude devices and high measurement operation difficulty.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] This invention provides a weak vibration signal amplification device based on biomimetic vision for capturing and amplifying the vibration signal of a vibrating object. The device includes: a laser light source disposed on the vibrating object; a vibration signal amplification and capture module; a vibration signal receiving module; and a vibration signal analysis module. The vibration signal amplification and capture module and the vibration signal receiving module are located on opposite sides of the vibrating object, and the vibration signal amplification and capture module is connected to the vibration signal analysis module.

[0008] Preferably, the vibration signal amplification and capture module includes a tripod and a capture unit and a astigmatism mirror disposed on the tripod. The capture unit is aligned with the vibration signal receiving module, and the astigmatism mirror is aligned with the output end of the laser light source.

[0009] Preferably, the capturing unit includes a housing, an optical lens, and a bionic machine vision sensor disposed within the housing. The housing is fixed on the tripod and located at the bottom of the astigmatism mirror. The optical lens is connected to the housing and is aligned with the vibration signal receiving module.

[0010] Preferably, the tripod is further provided with a height adjuster for adjusting the height of the optical lens and a ball head for adjusting the angle of the optical lens. The bottom end of the ball head is connected to the height adjuster, and the top end of the ball head is connected to the outer shell.

[0011] Preferably, the vibration signal receiving module includes a base, a mounting bracket on the base, and a light-receiving plate on the mounting bracket, with the optical lens aligned with the light-receiving plate.

[0012] Preferably, the vibration signal analysis module is connected to the bionic machine vision sensor via a data cable.

[0013] Preferably, the astigmatic mirror is a concave mirror.

[0014] Preferably, the outer side of the astigmatic lens is wrapped with a cylindrical lens adjustment frame.

[0015] Preferably, the laser source is fixed to the top of the vibrating object by an adhesive plate.

[0016] Preferably, the vibration signal analysis module uses a computer.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention provides a weak vibration signal amplification device based on bionic vision. By attaching a laser light source to a vibrating object, the vibrating object drives the laser light source and the laser emitted by it to move in the same regular pattern. At the same time, the light signal is continuously sensed by the combination of an optical lens and a bionic machine vision sensor through the reflection and divergence path of the astigmatic mirror and projected onto a light receiving plate. The light signal is then processed and analyzed to convert it into information such as vibration frequency, thereby amplifying weak vibration signals that are difficult to detect.

[0019] 2. The present invention provides a weak vibration signal amplification device based on bionic vision. By setting a height adjuster and a spherical gimbal, the height and orientation of the optical lens can be freely adjusted, which facilitates the observation of the light intensity signal of the light receiving plate from different angles and positions.

[0020] 3. The weak vibration signal amplification device based on bionic vision provided by the present invention has a lens adjustment frame fixed on the outside of the astigmatic mirror, which facilitates the adjustment of the position of the laser emitted by the laser source incident on the astigmatic mirror and the position of the laser emitted out to the light receiving plate, thus simplifying the operation of the device. Attached Figure Description

[0021] Figure 1 A schematic diagram of a weak vibration signal amplification device based on bionic vision provided in this embodiment;

[0022] Figure 2 for Figure 1 The schematic diagram of the working principle of the embodiment shown is as follows;

[0023] Explanation of markings in the diagram:

[0024] 1. Bionic machine vision sensor; 2. Housing; 3. Optical lens; 4. Tripod; 5. Height adjuster; 6. Spherical head; 7. Astigmatism filter; 8. Lens adjustment frame; 9. Laser light source; 10. Adhesive board; 11. Light receiving plate; 12. Data cable; 13. Computer; 14. Vibrating object; 15. Fixture; and 16. Base. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] Example

[0027] refer to Figure 1As shown, according to one aspect of this embodiment, this embodiment provides a weak vibration signal amplification device based on biomimetic vision for capturing and amplifying the vibration signal of a vibrating object 14, including: a laser light source 9 disposed on the vibrating object 14, and a vibration signal amplification and capture module, a vibration signal receiving module and a vibration signal analysis module. The vibration signal amplification and capture module and the vibration signal receiving module are respectively located on opposite sides of the vibrating object 14, and the vibration signal amplification and capture module is connected to the vibration signal analysis module.

[0028] The vibrating object 14 drives the laser source 9 to vibrate. The vibration signal amplification and capture module amplifies the laser reflected from the laser source 9 into a light intensity signal and sends it to the vibration signal receiving module. The vibration signal amplification and capture module captures the light intensity signal on the vibration signal receiving module, outputs the light intensity signal as a vibration frequency image, and transmits the vibration frequency image to the vibration signal analysis module for analysis.

[0029] As an alternative implementation, the laser source 9 is fixed to the vibrating object 14 by the adhesive plate 10.

[0030] The vibration signal amplification and capture module includes a tripod 4 and a capture unit and a diffuser 7 mounted on the tripod 4; the capture unit includes a housing 2, an optical lens 3 and a bionic machine vision sensor 1 mounted inside the housing 2, the optical lens 3 is fixed on the housing 2, the housing 2 is mounted on the tripod 4, and the optical lens 3 is aligned with the light receiving plate 11.

[0031] As an optional implementation, the tripod 4 is also provided with a height adjuster 5 for adjusting the height of the optical lens 3 and a ball head 6 for adjusting the angle of the optical lens 3. The bottom end of the ball head 6 is connected to the height adjuster 5, and the top end of the ball head 6 is connected to the outer shell 2.

[0032] Specifically, the height adjuster 5 is used to adjust the height of the tripod 4, and the ball head 6 is used to adjust the orientation of the optical lens 3. When the vibrating object 14 vibrates, due to the adjustment and stabilization capabilities of the tripod 4, the optical lens 3 can freely choose the angle and height to align with the light-receiving plate 11, thereby improving the accuracy and stability of the measurement.

[0033] The astigmatism mirror 7 is aligned with the laser light source 9. The astigmatism mirror 7 is equipped with a spherical mirror. The outer side of the astigmatism mirror 7 is wrapped with a lens adjustment frame 8. The lens adjustment frame 8 is cylindrical and is used to fix the spherical mirror of the astigmatism mirror 7.

[0034] The vibration signal receiving module includes a base 16, a mounting bracket 15 mounted on the base 16, and a light-receiving plate 11 mounted on the mounting bracket 15. The light-receiving plate 11 is approximately aligned with the astigmatism mirror 7 and the laser source 9.

[0035] Specifically, the base 16 is used to stabilize the light-receiving plate 11, and the fixing bracket 15 is used to rotate and fix the light-receiving plate 11.

[0036] As an optional implementation, the vibration signal analysis module uses a computer 13, which is connected to the bionic machine vision sensor 1 via a data cable 12.

[0037] Specifically, the computer 13 is equipped with a vibration signal analysis and processing unit and a vibration signal visualization unit.

[0038] As an alternative implementation, both the vibration signal analysis and processing unit and the vibration signal visualization unit can employ existing technologies.

[0039] Vibration signal analysis module: Used to receive the light intensity signal captured by the vibration signal capture module and convert the light intensity signal into a vibration frequency signal.

[0040] The working principle of the weak vibration signal amplification device based on bionic vision provided in this embodiment is as follows:

[0041] The laser source 9 is fixed to the vibrating object 14 via the adhesive plate 10, so that when the vibrating object 14 vibrates, it drives the laser source 9 and the laser emitted by the laser source 9 to move in the same regular pattern. The laser beam is aligned with the astigmatism mirror 7, which reflects the laser beam onto the light-receiving plate 11. The weak vibration of the laser is amplified after being reflected by the astigmatism mirror 7, and when it is projected onto the light-receiving plate 11, it has a large displacement, causing the light intensity change on the surface of the light-receiving plate 11 to occur in the same regular pattern as that of the vibrating object 14. The light intensity change signal on the light-receiving plate 11 is continuously captured by the optical lens 3, continuously sensed by the bionic machine vision sensor 1, and the light intensity signal is processed and analyzed to convert the light intensity signal into a vibration frequency image, thereby amplifying the weak vibration signal that is difficult to detect.

[0042] The laser source 9 continuously emits a dense beam of light that adheres tightly to the vibrating object 14. Due to the transmission nature of vibration, if the vibrating object 14 vibrates, the laser source 9 will produce vibrations in the same regular pattern. (Reference) Figure 2 As shown, the laser source 9 moves in the direction of the arrow, and the position of the dense beam changes accordingly, as does the incident position relative to the astigmatism mirror 7.

[0043] As an optional implementation, the astigmatism mirror 7 is a concave mirror.

[0044] Taking any optical path as an example, with the positive direction of the horizontal line as the reference direction, the reference angle between the optical path and the horizontal reference line is γ. Let the incident angle of the optical path be α, the exit angle be δ, and the tangent azimuth angle at the incident point on the astigmatism mirror 7 be θ. Then the incident angle α, the reference angle γ, and the tangent azimuth angle θ satisfy the following relationship:

[0045]

[0046] The tangent azimuth θ can be represented by the radius of curvature R of the astigmatism mirror 7 and the position of the incident point. Connect the center of the sphere of the astigmatism mirror 7 and the incident point, and draw a perpendicular line from the center of the sphere to the horizontal line, with the perpendicular line being the height r of the incident point, forming a right triangle. Then the tangent azimuth θ can be expressed by the following formula:

[0047]

[0048] Furthermore, because the exit angle δ of this optical path satisfies:

[0049]

[0050] The exit angle δ can be expressed using the incident angle, radius of curvature R, and incident height r as follows:

[0051]

[0052] Therefore, when the incident angle remains constant, the exit angle δ and the incident height exhibit an approximately linear relationship, resulting in scattering of parallel light. By appropriately adjusting the position of the light-receiving plate 11, the scattered parallel light source can be obtained, achieving a displacement amplification effect.

[0053] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A weak vibration signal amplification device based on biomimetic vision, used to capture and amplify the vibration signal of a vibrating object (14), characterized in that, include: A laser light source (9) is provided on the vibrating object (14), as well as a vibration signal amplification and capture module, a vibration signal receiving module and a vibration signal analysis module. The vibration signal amplification and capture module and the vibration signal receiving module are located on opposite sides of the vibrating object (14), and the vibration signal amplification and capture module is connected to the vibration signal analysis module. The vibration signal amplification and capture module includes a tripod (4) and a capture unit and a specular astigmatism mirror (7) disposed on the tripod (4). The capture unit is aligned with the vibration signal receiving module, and the specular astigmatism mirror (7) is aligned with the output end of the laser source (9). The capturing unit includes a housing (2), an optical lens (3), and a bionic machine vision sensor (1) disposed inside the housing (2). The housing (2) is fixed on the tripod (4) and located at the bottom of the astigmatism mirror (7). The optical lens (3) is connected to the housing (2) and is aligned with the vibration signal receiving module. The vibration signal receiving module includes a base (16), a fixing frame (15) disposed on the base (16), and a light receiving plate (11) disposed on the fixing frame (15), and the optical lens (3) is aligned with the light receiving plate (11). The vibration signal analysis module is connected to the bionic machine vision sensor (1) via a data cable (12); The laser light source (9) is fixed to the top of the vibrating object (14) by an adhesive plate (10); The laser emitted by the laser source (9) passes through the reflection and divergence path of the astigmatism mirror (7) and is projected onto the light receiving plate. The light signal of the light receiving plate is continuously sensed by the combination of optical lens and bionic machine vision sensor, and the light signal is processed and analyzed to be converted into vibration frequency information.

2. The weak vibration signal amplification device based on bionic vision according to claim 1, characterized in that, The tripod (4) is also provided with a height adjuster (5) for adjusting the height of the optical lens (3) and a ball head (6) for adjusting the angle of the optical lens (3). The bottom end of the ball head (6) is connected to the height adjuster (5), and the top end of the ball head (6) is connected to the outer shell (2).

3. The weak vibration signal amplification device based on bionic vision according to claim 1, characterized in that, The astigmatism mirror (7) is a concave mirror.

4. The weak vibration signal amplification device based on bionic vision according to claim 1, characterized in that, The astigmatism lens (7) is wrapped with a cylindrical lens adjustment frame (8).

5. The weak vibration signal amplification device based on bionic vision according to claim 1, characterized in that, The vibration signal analysis module uses a computer (13).

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