Distortion testing device for read-write table
The distortion testing device on the reading and writing platform automatically detects distortion, and the camera uses a camera to capture nine points of imaging data in a manner similar to the human eye. This solves the problems of poor consistency and low accuracy in existing manual testing, and achieves high-precision and high-consistency imaging quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 南通诺瞳奕目医疗科技有限公司
- Filing Date
- 2025-07-25
- Publication Date
- 2026-05-15
AI Technical Summary
Existing manual autonomous detection reading and writing stations suffer from poor consistency and accuracy when detecting distortion, resulting in inconsistent and inaccurate image quality.
A reader/writer distortion testing device is adopted, including a fixing component, a calibration plate, a lens displacement adjustment component, and a lens component. It uses a camera to mimic the human eye to capture nine-point imaging data of the reader/writer, automatically detects distortion, and achieves high repeatability, consistency, and accuracy after one calibration with a slide rail.
It achieves high precision and high consistency in reader distortion testing, reduces repetitive manual inspection work, and improves the stability and accuracy of imaging quality.
Smart Images
Figure CN224246993U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of distortion testing technology, specifically to a distortion testing device for a reader / writer. Background Technology
[0002] In the imaging scenario of a reader / writer, distortion is a key issue that needs to be controlled, because the effects of distortion will affect the entire process from information acquisition and processing to application, especially impacting image quality, information extraction, and practical application effects.
[0003] In the current production process, distortion testing of reading and writing stations is generally carried out manually, that is, by observing the distortion with the human eye.
[0004] However, using the human eye as a benchmark to detect distortion in each reader requires testers to repeat a large amount of testing work. Furthermore, the standards and accuracy of human eye testing cannot be kept consistent, resulting in poor consistency and inaccuracy in distortion testing of the reader, which cannot guarantee the imaging quality of the reader leaving the factory. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, this invention provides a reader / writer distortion testing device, which solves the problems of poor consistency and accuracy in existing manual detection of reader / writer distortion.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, this utility model provides the following technical solution:
[0009] A reader / writer distortion testing device, the device comprising:
[0010] Fixed components, calibration plate, lens shift adjustment components, and lens assembly;
[0011] The fixing components include a reading / writing station fixing plate, a bracket, and a fixing base plate;
[0012] The reader / writer under test is mounted on the fixed base plate via the reader / writer mounting plate and bracket; the calibration plate is mounted on the fixed base plate and located below the reader / writer under test.
[0013] The lens displacement adjustment component is disposed on the edge of one side of the fixed base plate; the lens assembly is slidably connected to the lens displacement adjustment component.
[0014] In one embodiment, the upper end of the bracket is provided with the reading / writing station fixing plate on the side facing the lens assembly, and the reading / writing station fixing plate supports the reading / writing station to be tested located above the fixing base plate; the lower end of the bracket is provided at the edge of the fixing base plate at the end away from the lens assembly.
[0015] In one embodiment, the reading and writing station mounting plate is provided with a plurality of mounting holes, and corresponding to the positions of the plurality of mounting holes, an equal number of mounting holes are provided on the back of the reading and writing station to be tested.
[0016] The mounting holes are equipped with an equal number of mounting parts.
[0017] In one embodiment, the mounting hole is a gourd-shaped hole, and correspondingly, the mounting component is a pre-tightened screw.
[0018] In one embodiment, the calibration plate is a black acrylic plate with a number of reference points evenly arranged on its upper surface.
[0019] In one embodiment, the lens displacement adjustment assembly includes slide rails along the Z direction and along the Y direction; one end of the slide rail along the Z direction is fixed to the edge of the fixed base plate away from the bracket, and the other end extends further away from the bracket; the lower end of the slide rail along the Y direction is slidably connected to the slide rail along the Z direction, and the slide rail along the Y direction is perpendicular to the slide rail along the Z direction.
[0020] The vertical direction of the plane where the lens assembly approaches or moves away from the calibration plate is the Y direction, and the parallel direction of the lens assembly when it approaches or moves away from the calibration plate is the Z direction.
[0021] In a preferred embodiment, the slide rails along the Z direction and the Y direction are both dovetail slide rails.
[0022] In a preferred embodiment, the lens assembly is slidably connected to a slide rail along the Y direction.
[0023] In one embodiment, the lens assembly includes a camera and a camera support; the camera is slidably connected to a slide rail along the Y direction via the camera support.
[0024] In a preferred embodiment, there are four mounting holes, which are evenly distributed at the four corners of the reader / writer mounting plate.
[0025] (III) Beneficial Effects
[0026] This invention provides a distortion testing device for a reader / writer. Compared with the prior art, it has the following advantages:
[0027] The reader / writer distortion testing device proposed in this utility model includes a fixing component, a calibration plate, a lens shift adjustment component, and a lens assembly. The fixing component further includes a reader / writer fixing plate, a bracket, and a fixing base plate. The reader / writer to be tested is mounted on the fixing base plate via the fixing plate and the bracket; the calibration plate is mounted on the fixing base plate and located below the reader / writer to be tested; the lens shift adjustment component is located on one edge of the fixing base plate; and the lens assembly is slidably connected to the lens shift adjustment component. This reader / writer distortion testing device utilizes a camera to mimic the human eye, capturing nine points of image data from the reader / writer. It can automatically detect image distortion, and the camera in the testing device only needs to be calibrated once via a sliding rail, exhibiting high repeatability, consistency, and accuracy. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the overall structure of the reader / writer distortion testing device in the embodiments of this application;
[0030] Figure 2 This is a schematic diagram of the reader distortion testing device in operation according to an embodiment of this application;
[0031] In the diagram: 1-Fixed component; 2-Calibration plate; 3-Lens shift adjustment component; 4-Lens assembly;
[0032] 11-Reader / writer mounting plate; 12-Bracket; 13-Fixing base plate;
[0033] 31 - Slide rail along the Z direction; 32 - Slide rail along the Y direction;
[0034] 41-Camera; 42-Camera support bracket. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0036] This application provides a reader / writer distortion testing device, which at least solves the problems of poor consistency and accuracy in the existing manual detection of reader / writer distortion, improves testing accuracy, and saves manpower.
[0037] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:
[0038] To address one or more of the problems mentioned in the background section, the technical solution of this application is based on the user's perspective, employing a camera to mimic the human eye, capturing nine-point imaging data from the reader / writer. Vertical and horizontal distortion values are calculated and compared with preset distortion thresholds to automatically detect reader / writer distortion. The reader / writer distortion testing device proposed in this application requires only one calibration of the camera used for image data capture via a sliding table, exhibiting high repeatability, consistency, and accuracy.
[0039] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0040] Example 1:
[0041] For ease of description, in the following embodiments, the vertical direction of the lens assembly 4 approaching or moving away from the plane where the calibration plate 2 is located is defined as the Y direction, and the parallel direction of the lens assembly 4 approaching or moving away from the calibration plate 2 is defined as the Z direction, specifically as follows: Figure 1 As shown.
[0042] See Figure 1 As shown, a reader / writer distortion testing device includes: a fixing component 1, a calibration plate 2, a lens displacement adjustment component 3, and a lens component 4. The fixing component 1 includes a reader / writer fixing plate 11, a bracket 12, and a fixing base plate 13.
[0043] The reader / writer to be tested for distortion is fixed to the upper end of the bracket 12 via the reader / writer fixing plate 11. The lower end of the bracket 12 is located at the edge of the fixing base plate 13, which is furthest from the lens assembly 4. When the reader / writer to be tested for distortion is unfolded for testing, it is positioned directly above the fixing base plate 13. The calibration plate 2 is positioned above the fixing base plate 13 and directly below the reader / writer to be tested for distortion.
[0044] The lens assembly 4 is slidably connected to the lens displacement adjustment assembly 3, and can move on the lens displacement adjustment assembly 3 to ensure that the lens assembly 4 is in the appropriate position when capturing imaging data.
[0045] Specifically:
[0046] The fixing component 1 is used to fix the reader / writer table to be tested for distortion. In a specific implementation, the fixing component 1 includes a reader / writer table fixing plate 11, a bracket 12, and a fixing base plate 13. The reader / writer table fixing plate 11 is provided on the side of the upper end of the bracket 12 facing the lens assembly 4, and the reader / writer table fixing plate 11 is used to fix the reader / writer table to be tested for distortion. The lower end of the bracket 12 is located at the edge of the fixing base plate 13 at the end away from the lens assembly 4, and the fixing base plate 13 is used to provide stable support for the entire reader / writer table distortion testing device.
[0047] In one embodiment, the reader / writer mounting plate 11 has a plurality of mounting holes, and the central area of the back of the reader / writer to be tested for distortion is also provided with a plurality of mounting holes corresponding to the positions of the mounting holes. By using mounting parts that match the number of mounting holes, the reader / writer to be tested for distortion can be quickly clamped onto the reader / writer mounting plate 11, and the position of the reader / writer remains basically consistent each time it is installed.
[0048] In practice, the number of mounting holes is not specifically limited, as long as it allows the reader / writer to be stably mounted on the reader / writer mounting plate 11 for distortion testing. For example, the number of mounting holes can be three, four, six, or eight, etc.
[0049] In a preferred embodiment, there are four mounting holes, evenly distributed at the four corners of the reader / writer mounting plate 11.
[0050] In a more preferred embodiment, the mounting hole is a gourd-shaped hole, and the matching mounting part is a pre-tightened screw. The reader / writer to be tested for distortion is quickly clamped onto the reader / writer fixing plate 11 through the pre-tightened screw and the gourd-shaped hole. The reader / writer can also be quickly disassembled after the test.
[0051] Calibration plate 2 is used to provide a reference benchmark for distortion testing.
[0052] The calibration plate 2 is placed in the groove in the middle of the fixed base plate 13 to provide a reference benchmark for the reader / writer distortion test error correction and determination of key parameters, so as to ensure the accuracy of subsequent measurement or imaging of the reader / writer.
[0053] In specific implementation, the specific form of calibration plate 2 is not particularly limited, as long as it can provide a reference benchmark for distortion testing. For example, in one embodiment, calibration plate 2 can be a checkerboard pattern.
[0054] In another embodiment, calibration plate 2 is a black acrylic plate with a 230mm × 230mm sheet of paper on top. Nine 0.5mm black dots are evenly distributed, spaced 110mm apart in the center of the paper. These nine black dots serve as reference points for capturing imaging data during distortion testing.
[0055] Lens shift adjustment component 3 is used to provide the lens assembly 4 with a movement path along the Z and Y directions.
[0056] In one embodiment, the lens displacement adjustment assembly 3 includes slide rails along the Z and Y directions. One end of the slide rail 31 along the Z direction is fixed to the edge of the fixed base plate 13 away from the bracket 12, and the other end extends further away from the bracket 12. The lower end of the slide rail 32 along the Y direction is slidably connected to the slide rail 31 along the Z direction, and is perpendicular to the slide rail 31 along the Z direction.
[0057] In a preferred embodiment, the slide rails along both the Z and Y directions are dovetail slide rails. The dovetail slide rail consists of two parts, male and female, which are used in a modular fashion. In specific implementations, the male and female parts can be configured according to actual application needs and can be adaptively adjusted; this is prior art and will not be elaborated further here.
[0058] Lens assembly 4 is used to capture calibration data.
[0059] Lens assembly 4 mimics the human eye, capturing nine points of imaging data on the reading and writing platform, and then calculating specific distortion values based on the imaging data to detect imaging distortion.
[0060] In one embodiment, the lens assembly 4 is slidably connected to the slide rail 32 along the Y direction. The height of the camera 41 in the Y direction is changed by sliding on the slide rail in the Y direction. At the same time, the lower end of the slide rail 32 along the Y direction is slidably connected to the slide rail 31 along the Z direction to move on the slide rail 31 along the Z direction, so as to adapt to the distortion test of reading and writing stations of different sizes.
[0061] In a preferred embodiment, the lens assembly 4 includes a camera 41 and a camera support 42. Specifically, the camera 41 is slidably connected to a slide rail 32 along the Y direction via the camera support 42.
[0062] The following explains the use and principle of the reader distortion testing device proposed in the embodiments of this application:
[0063] During testing, the reader / writer to be tested for distortion is fixed on the reader / writer mounting plate 11, and then the position of the camera 41 is adjusted to be appropriate (during testing, the lens of the camera 41 is flush with the outer frame of the reader / writer when it is open, that is, the lens of the camera 41 is aligned with two straight lines, such as...). Figure 2 (As shown), then the camera 41 captures the coordinates of nine points on the calibration plate 2, calculates the longitudinal and lateral distortion values, and then compares the calculated distortion values with the set threshold. If the calculated distortion values exceed the preset threshold, it means that the imaging of the test station does not meet the requirements and needs to be corrected and adjusted. If it does not exceed the preset threshold, it means that the reading and writing station is qualified.
[0064] In the embodiments of this application, the preset threshold is preferably 0.05. In specific tests, it can be adjusted according to actual needs.
[0065] In summary, compared with existing technologies, it has the following beneficial effects:
[0066] 1. The reader / writer distortion testing device proposed in this utility model includes a fixing component, a calibration plate, a lens displacement adjustment component, and a lens assembly; wherein, the fixing component includes a reader / writer fixing plate, a bracket, and a fixing base plate. The reader / writer to be tested is mounted on the fixing base plate via the reader / writer fixing plate and the bracket; the calibration plate is mounted on the fixing base plate and located below the reader / writer to be tested; the lens displacement adjustment component is located on one edge of the fixing base plate; the lens assembly is slidably connected to the lens displacement adjustment component. The reader / writer distortion testing device of this application uses a camera to mimic the human eye, capturing nine-point imaging data of the reader / writer, which can automatically detect imaging distortion. Moreover, the camera in the testing device only needs to be calibrated once via a sliding rail, resulting in high repeatability, consistency, and accuracy.
[0067] 2. The reading and writing table distortion testing device proposed in this utility model includes a reading and writing table fixing plate with four gourd-shaped holes, which allows the reading and writing table to be quickly clamped onto the reading and writing table fixing plate by pre-tightening screws, achieving the purpose of quick assembly and disassembly, and the position of the reading and writing table is basically the same each time it is installed.
[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0069] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A reader / writer distortion testing device, characterized in that, The device includes: The fixed assembly (1), the calibration plate (2), the lens shift adjustment assembly (3), and the lens assembly (4); The fixing component (1) includes a reading and writing table fixing plate (11), a bracket (12), and a fixing base plate (13); The reading and writing station to be tested is mounted above the fixed base plate (13) via the reading and writing station fixing plate (11) and the bracket (12); the calibration plate (2) is mounted on the fixed base plate (13) and located below the reading and writing station to be tested; The lens displacement adjustment component (3) is disposed on the edge of one side of the fixed base plate (13); the lens assembly (4) is slidably connected to the lens displacement adjustment component (3).
2. The reader / writer distortion testing device as described in claim 1, characterized in that, The upper end of the bracket (12) is provided with the reading and writing station fixing plate (11) facing the lens assembly (4), and the reading and writing station fixing plate (11) supports the reading and writing station to be tested located above the fixing base plate (13); the lower end of the bracket (12) is provided at the edge of the fixing base plate (13) at the end away from the lens assembly (4).
3. The reader / writer distortion testing device as described in claim 1, characterized in that, The reading and writing station fixing plate (11) has a number of mounting holes, and the same number of mounting holes are provided on the back of the reading and writing station to be tested, corresponding to the positions of the mounting holes. The mounting holes are equipped with an equal number of mounting parts.
4. The reader / writer distortion testing device as described in claim 3, characterized in that, The mounting hole is a gourd-shaped hole, and the mounting component is a pre-tightened screw.
5. The reader / writer distortion testing device as described in claim 1, characterized in that, The calibration plate (2) is a black acrylic plate with a number of reference points evenly distributed on its upper surface.
6. The reader / writer distortion testing device as described in claim 1, characterized in that, The lens displacement adjustment assembly (3) includes slide rails (32) along the Z direction and along the Y direction; one end of the slide rail (31) along the Z direction is fixed to the edge of the fixed base plate (13) away from the bracket (12), and the other end extends further away from the bracket (12); the lower end of the slide rail (32) along the Y direction is slidably connected to the slide rail (31) along the Z direction, and the slide rail (32) along the Y direction is perpendicular to the slide rail (31) along the Z direction as a whole; The vertical direction of the plane where the lens assembly (4) approaches or moves away from the calibration plate (2) is the Y direction, and the parallel direction of the lens assembly (4) when it approaches or moves away from the calibration plate (2) is the Z direction.
7. The reader / writer distortion testing device as described in claim 6, characterized in that, The slide rails (32) along the Z direction and the Y direction are both dovetail groove slide rails.
8. The reader / writer distortion testing device as described in claim 6, characterized in that, The lens assembly (4) is slidably connected to the slide rail (32) along the Y direction.
9. The reader / writer distortion testing device according to any one of claims 1-8, characterized in that, The lens assembly (4) includes a camera (41) and a camera support (42). The camera (41) is slidably connected to a slide rail (32) along the Y direction via the camera support (42).
10. The reader / writer distortion testing device as described in claim 4, characterized in that, There are four mounting holes, which are evenly distributed at the four corners of the reading and writing station fixing plate (11).