Active damping of a lamp inspection machine table

Abstract

The utility model discloses an active damping lamp inspection machine workstation, include: base, damping platform, it includes the work flat plate, damping assembly and base flat plate that set gradually from top to bottom, base flat plate is fixed on the base, and the work flat plate is used for carrying lamp inspection machine, damping assembly includes piezoelectric ceramic actuator, vibration sensor and controller, the lower end of piezoelectric ceramic actuator is connected with base flat plate, and the upper end is connected with work flat plate, vibration sensor sets up in work flat plate, controller and vibration sensor and piezoelectric ceramic actuator electric connection, wherein, controller is configured as: receiving vibration signal of vibration sensor, and according to the signal drive piezoelectric ceramic actuator generates the compensation force opposite vibration direction to suppress the vibration of work flat plate, this active damping lamp inspection machine workstation can be based on the vibration of lamp inspection machine to active compensation the vibration, reduce the tiny displacement or jitter of lamp inspection machine to a certain extent, help to improve the definition of image acquisition.

Description

Technical Field

[0001] This utility model relates to the field of precision instrument testing equipment technology, and in particular to an active vibration damping lamp inspection machine worktable for detecting gel impurities. Background Technology

[0002] As an optical inspection device, the light inspection machine is widely used in the pharmaceutical, medical device, and food industries for visual inspection of foreign objects, impurities, and sealing quality in transparent or semi-transparent containers. When inspecting gel products, the unique texture of the gel and the potentially tiny size of impurities place high demands on the stability of the imaging system. Vibrations in the working environment, such as vibrations transmitted from the ground or micro-vibrations generated by the equipment itself, can cause minute displacements or shaking of the light inspection machine and its supporting platform. These micro-vibrations directly affect the clarity of image acquisition, thus impacting the accuracy and reliability of the inspection results.

[0003] In existing technologies, to improve equipment stability, rubber pads or passive vibration dampers are often added to the equipment base to isolate low-frequency vibrations. Some solutions also propose using casters and adjustable support legs to facilitate equipment movement and achieve macroscopic stability after positioning. However, these passive vibration damping measures may be insufficient in attenuating high-frequency micro-vibrations and actively compensating for continuous environmental vibrations.

[0004] Therefore, it is necessary to develop a working platform capable of actively compensating for high-frequency micro-vibrations, thereby ensuring the image quality of the light inspection machine. Utility Model Content

[0005] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides an active vibration damping light inspection machine workbench. This workbench can actively compensate for the vibration of the light inspection machine, reducing minor displacements or vibrations to a certain extent and thus improving the clarity of image acquisition.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides an active vibration damping light inspection machine workbench, comprising:

[0008] Base;

[0009] A vibration damping platform includes a working plate, a vibration damping component, and a base plate arranged sequentially from top to bottom; the base plate is fixed to the base, and the working plate is used to support the light inspection machine; the active vibration damping component includes a piezoelectric ceramic actuator, a vibration sensor, and a controller; the lower end of the piezoelectric ceramic actuator is connected to the base plate, and the upper end is connected to the working plate; the vibration sensor is disposed on the working plate; the controller is electrically connected to the vibration sensor and the piezoelectric ceramic actuator.

[0010] in,

[0011] The controller is configured to receive the vibration signal from the vibration sensor and drive the piezoelectric ceramic actuator to generate a compensating force opposite to the vibration direction based on the signal, so as to suppress the vibration of the working plate.

[0012] Furthermore, it includes at least three of the piezoelectric ceramic actuators; and the piezoelectric ceramic actuators are not collinear.

[0013] Furthermore, there are four piezoelectric ceramic actuators, which are respectively disposed in the four apex corner regions of the base plate or the working plate.

[0014] Furthermore, it includes at least two of the vibration sensors.

[0015] Furthermore, it includes at least three vibration sensors, and the vibration sensors are not collinear.

[0016] Furthermore, there are four vibration sensors, which are respectively located in the four corner areas of the working plate.

[0017] Furthermore, the lower part of the base is provided with multiple casters.

[0018] Furthermore, it further includes:

[0019] Multiple hydraulic support frames are installed at the bottom of the base, and their height is adjustable so that they extend to touch the ground and lift the casters off the ground.

[0020] This utility model has at least the following advantages or beneficial effects:

[0021] This invention employs a structure that incorporates a vibration damping platform between the base and the working plate supporting the light inspection machine. The vibration damping platform comprises an active vibration damping assembly consisting of a piezoelectric ceramic actuator, a vibration sensor, and a controller. The vibration sensor monitors the vibration state of the working plate in real time, while the controller drives the piezoelectric ceramic actuator to generate a reverse compensation force based on the monitoring signal. Overall, this invention can actively suppress the micro-vibrations of the working plate, helping to provide a more stable working environment for the light inspection machine, thereby positively impacting the quality of image acquisition.

[0022] This invention employs a structure with multiple hydraulic support frames installed at the bottom of the base. The height of the hydraulic support frames is adjustable so that they extend and touch the ground, lifting the casters off the ground. This structure provides rigid support after the equipment is in place. Overall, this invention enhances the stability of the base during operation, reduces ground interference transmitted through the casters, and creates more favorable working conditions for the active vibration damping system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of the workbench of the active vibration damping light inspection machine;

[0025] Figure 2 This is a front view of the workbench of the active vibration damping light inspection machine;

[0026] Figure 3 Left view of the workbench of the active vibration damping light inspection machine.

[0027] Figure label:

[0028] 1-Base; 11-Casts; 12-Hydraulic support frame;

[0029] 2-Vibration damping platform; 21-Work plate; 22-Vibration damping assembly; 221-Piezoelectric ceramic actuator; 222-Vibration sensor; 23-Base plate;

[0030] 3-Light inspection machine. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this utility model and do not specifically refer to any part or element in this utility model. They should not be construed as limitations on this utility model.

[0035] In this utility model, terms such as "fixed", "connected", and "linked" should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For relevant scientific researchers or technicians in this field, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation of this utility model.

[0036] The embodiments of this utility model will be described in detail below.

[0037] This utility model discloses an active vibration damping workbench for a light inspection machine. A vibration damping platform 2 is installed between the base 1 and the working plate 21 supporting the light inspection machine 3, and a vibration damping assembly 22, consisting of a piezoelectric ceramic actuator 221, a vibration sensor 222, and a controller (not shown), is integrated to establish a closed-loop control system. When the working plate 21 vibrates due to environmental or equipment-related factors, the vibration sensor 222, arranged on it, senses the vibration signal and transmits it to the controller. After processing the signal, the controller drives the piezoelectric ceramic actuator 221, connected between the base plate 23 and the working plate 21, to generate a compensating force opposite to the detected vibration direction. This active application of compensating force based on real-time feedback, compared to traditional passive vibration damping structures, has a more direct intervention capability for suppressing, especially high-frequency micro-vibrations, thereby helping to reduce the vibration amplitude of the working plate 21 and providing a relatively more stable working reference surface for the light inspection machine 3 placed on it. This improved stability helps improve image quality for gel impurity detection applications requiring high-definition imaging, thus positively impacting the reliability of the detection results.

[0038] The details are as follows:

[0039] Figure 1 A schematic diagram of the three-dimensional structure of the workbench of the active vibration damping light inspection machine; Figure 2 This is a front view of the workbench of the active vibration damping light inspection machine; Figure 3 Left view of the workbench of the active vibration damping light inspection machine.

[0040] The base 1 constitutes the basic support structure of the entire workbench, and its function is to provide a stable mounting base for the upper components. In this embodiment, the base 1 adopts a rectangular frame structure; in other embodiments, the base shape can be designed as a circular or polygonal frame as needed. The overall dimensions of the base 1 can be adjusted according to the specifications of the light inspection machine 3 it supports, for example, the length range is 1000-1500mm, the width range is 600-800mm, and the height range is 100-200mm.

[0041] The base 1 has multiple casters 11 at its lower part, which facilitate the movement and positioning of the entire workbench. In this embodiment, there are four casters 11, two of which are swivel casters with brakes and two are fixed casters. The wheels of the casters 11 can be made of polyurethane or nylon, and the diameter can be 75mm-125mm. In other embodiments, the number of casters 11 can also be three or six, and all of them can be swivel casters or a combination of them can be configured according to the movement path requirements.

[0042] The lower part of the base 1 also includes multiple hydraulic support frames 12. Their function is to provide rigid support to enhance stability after the equipment is moved to the target workstation. The height of the hydraulic support frames 12 can be adjusted by a manual hydraulic pump or an electric actuator, ensuring they extend and firmly contact the ground, and that all casters 11 have a ground clearance of 5mm-15mm. In this embodiment, there are four hydraulic support frames 12; in other embodiments, there may be six hydraulic support frames 12, and mechanical spiral support feet may be used instead of hydraulic ones. Rubber pads or nylon blocks can be added to the bottom of the support feet of the hydraulic support frames 12 to increase friction and prevent scratching the ground.

[0043] The vibration damping platform 2 is the core component of this utility model, and it is provided with a working plate 21, a vibration damping component 22 and a foundation plate 23 from top to bottom.

[0044] The base plate 23 is fixedly connected to the top surface of the base 1 by several sets of high-strength bolts. Its function is to evenly transfer the load of the vibration damping platform 2 to the base 1.

[0045] The work plate 21 is used to directly support and fix the light inspection machine 3, and its surface may be provided with threaded mounting holes or locating pin holes. In this embodiment, both the work plate 21 and the base plate 23 are made of aluminum plate by CNC machining center milling, and their thickness can be selected between 15mm and 30mm, for example, preferably 20mm. The parallelism requirement between the work plate 21 and the base plate 23 is high, and it usually needs to be controlled within 0.05mm.

[0046] The vibration damping component 22 is encapsulated in the space formed between the working plate 21 and the base plate 23, and its function is to actively suppress the vibration transmitted to the working plate 21.

[0047] The vibration damping assembly 22 includes a piezoelectric ceramic actuator 221, a vibration sensor 222, and a controller (not shown in the figure).

[0048] The lower end of the piezoelectric ceramic actuator 221 is fixedly connected to the base plate 23 by a threaded connection or high-strength epoxy resin adhesive, and the upper end is fixedly connected to the working plate 21 in the same way. Its function is to generate precise displacement based on the inverse piezoelectric effect under the drive of the controller, thereby outputting a compensating force.

[0049] The vibration sensor 222 is mounted on the lower surface or side of the working plate 21 by bolts or magnetic attraction, and its function is to detect the vibration acceleration signal of the working plate 21 in real time. In this embodiment, the vibration sensor 222 is an IEPE piezoelectric accelerometer; in other embodiments, a MEMS accelerometer or a laser vibration meter may also be used.

[0050] The controller, vibration sensor 222, and piezoelectric ceramic actuator 221 are electrically connected via shielded cables to form a closed-loop feedback control system. The controller may employ a microprocessor and run a PID control algorithm; in other embodiments, a DSP or FPGA may be used to implement more complex adaptive control algorithms. The aforementioned control algorithms are techniques that will be understood by those skilled in the art.

[0051] In this embodiment, the vibration damping component 22 is provided with four piezoelectric ceramic actuators 221. These piezoelectric ceramic actuators 221 are arranged in a non-collinear manner. Specifically, they are respectively disposed at the four apex regions of the base plate 23, forming symmetrical support. This arrangement helps to resist torques in various directions and is beneficial for suppressing torsional vibrations of the working plate 21. In other embodiments, the number of piezoelectric ceramic actuators 221 may also be three, five, or six, and they may be arranged at the equidistant points of the virtual circle formed between the working plate 21 and the base plate 23.

[0052] Furthermore, in this embodiment, the vibration damping component 22 is equipped with four vibration sensors 222. These vibration sensors 222 are arranged in a non-collinear manner. Specifically, they are respectively located at the four apex corners of the working plate 21. This arrangement helps to comprehensively perceive the vibration state of different positions of the working plate 21, which is particularly beneficial for the modal identification of low-frequency swaying or torsional vibrations. The vibration sensors 222 are lightweight (e.g., less than 50 grams) to avoid significantly affecting the dynamic characteristics of the working plate 21. In other embodiments, the number of vibration sensors 222 may also be two, three, or five, and they may be arranged at the center of the working plate 21 or at the midpoint of the line connecting the edges.

[0053] The controller is configured to perform active vibration damping control. Its workflow is as follows: it continuously receives voltage signals (representing vibration acceleration) from each vibration sensor 222 and digitizes them using a built-in AD converter. The controller then preprocesses the digital signals. Based on a preset control algorithm (such as the aforementioned PID algorithm), the controller calculates the driving voltage value to be applied to each piezoelectric actuator 221 and outputs it through the DA converter. This driving voltage causes the piezoelectric actuator 221 to produce a corresponding minute deformation, thereby applying a force to the working plate 21 that is opposite in phase to the detected vibration, thus counteracting the vibration energy. The update time of the control cycle is typically required to be less than 1 millisecond to ensure effective suppression of high-frequency vibrations. This active control mechanism based on real-time feedback, compared to passive vibration isolation, can more effectively attenuate vibrations of specific frequencies, especially in the region near the resonant frequency.

[0054] Overall, this embodiment of the invention adopts a technical solution combining a base 1 and a vibration-damping platform 2 (including a working plate 21, a vibration-damping component 22, and a base plate 23). The vibration-damping component 22's active control loop monitors and compensates for the micro-vibrations of the working plate 21 in real time. Combined with the mobility provided by the casters 11 and the static stability ensured by the hydraulic support frame 12, this workbench can, to a certain extent, isolate environmental vibrations and improve the imaging environment of the light inspection machine 3. This structural design, aimed at suppressing high-frequency micro-vibrations, can positively impact the reliability and consistency of the inspection system for high-precision optical inspection applications involving minute impurities such as gel cards.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An active vibration damping light inspection machine workbench, characterized in that, include: Base (1); The vibration damping platform (2) includes a working plate (21), a vibration damping component (22), and a base plate (23) arranged sequentially from top to bottom; the base plate (23) is fixed on the base (1), and the working plate (21) is used to support the light inspection machine (3); the vibration damping component (22) includes a piezoelectric ceramic actuator (221), a vibration sensor (222), and a controller; the lower end of the piezoelectric ceramic actuator (221) is connected to the base plate (23), and the upper end is connected to the working plate (21); the vibration sensor (222) is disposed on the working plate (21); the controller is electrically connected to the vibration sensor (222) and the piezoelectric ceramic actuator (221); in, The controller is configured to receive the vibration signal from the vibration sensor (222) and drive the piezoelectric ceramic actuator (221) to generate a compensating force opposite to the vibration direction based on the signal, so as to suppress the vibration of the working plate (21).

2. The active vibration damping light inspection machine workbench according to claim 1, characterized in that, It includes at least three of the piezoelectric ceramic actuators (221); and the piezoelectric ceramic actuators (221) are not collinear.

3. The active vibration damping light inspection machine workbench according to claim 2, characterized in that, There are four piezoelectric ceramic actuators (221), which are respectively set in the four corner areas of the base plate (23) or the working plate (21).

4. The active vibration damping light inspection machine workbench according to claim 1, characterized in that, It includes at least two of the vibration sensors (222).

5. The active vibration damping light inspection machine workbench according to claim 1, characterized in that, It includes at least three vibration sensors (222), and the vibration sensors (222) are not collinear.

6. The active vibration damping light inspection machine workbench according to claim 5, characterized in that, There are four vibration sensors (222), which are respectively set in the four top corner areas of the working plate (21).

7. The active vibration damping light inspection machine workbench according to claim 1, characterized in that, The base (1) is provided with multiple casters (11) at its lower part.

8. The active vibration damping light inspection machine workbench according to claim 7, characterized in that, Further includes: Multiple hydraulic support frames (12) are installed at the bottom of the base (1) and their height is adjustable so that they extend to touch the ground and lift the casters (11) off the ground.

Images