Vision detection method and vision detection device

Abstract

The present invention relates to a vision testing method and device. The vision testing method comprises the following steps: S1. setting a plurality of movable sight marks for a test subject to test, and presetting a test plan, wherein the test plan includes the number of tests, the number a1 of sight marks used in each test, and the time the sight marks are used each time; S2. When the test subject arrives at the test location, executing the pre-set test plan and obtaining the number a2 of sight marks identified by the test subject in use during each test. By setting a plurality of movable sight marks and pre-setting a test plan, the vision testing method avoids errors caused by fixed content and memory effects in traditional vision tests. The mobility of the sight marks increases the randomness and difficulty of the test, allowing the test results to more truly reflect the test subject's vision level, thereby reducing vision test errors caused by repeated test content and improving the accuracy of the vision test.

Description

Technical Field

[0001] The present invention relates to the technical field of vision detection, and more particularly to a vision detection method and a vision detection device. Background Art

[0002] With the development of technology, mobile phones have become indispensable smart devices in people's lives. While they provide many conveniences, they also bring many adverse effects. Eye health issues are the most obvious. For example, using phones in the dark and staying up late at night are becoming increasingly common. This has also led to a gradual increase in the number of people with myopia. Due to the rapid progression of myopia, some people with myopia need multiple vision tests in a short period of time to quickly understand changes in their visual function.

[0003] Currently, vision measurement is usually performed in a static manner, such as using a traditional eye chart. The test subject is required to stare at the test chart still and assess their vision level by identifying the symbol or letter "E" on the chart. Patent application number CN03252948 discloses a self-testing vision test device that uses optical principles to scale the eye chart, greatly reducing the distance required for vision testing. The test subject can change the eye chart dial for testing by turning a handwheel. However, the eye chart dial in this device and the use of traditional eye charts for testing both have fixed content and are prone to memory loss after multiple tests, resulting in large errors in subsequent tests.

[0004] In view of this, it is indeed necessary to provide a technical solution to the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a vision detection method and a vision detection device in response to the above-mentioned defects of the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A vision detection method, comprising the following steps:

[0008] S1. Set up a plurality of movable sight signs for the tester to test, and preset a test plan, which includes the number of tests, the number of sight signs used in each test, and the time for each sight sign to be used;

[0009] S2. When the tester arrives at the test location, the preset test plan is executed to obtain the number a2 of visual signs identified by the tester in the used state in each test;

[0010] S3. Compare the value of a2 with the value of a1. If a2 and a1 are equal, the test is considered successful, and the distance between the tester and the sight mark is obtained and recorded. If a2 and a1 are not equal, the test is considered failed.

[0011] S4. After the test is finally determined to have failed in step S3, the distance between the tester and the sight mark is shortened by N cm, and the test is repeated back to the node in step S2 until the test is determined to have succeeded.

[0012] As an improvement to the vision detection method, in step S2 and step S3, when it is determined that the test has failed, the test plan is executed again, and in each test, the sight mark in use is controlled to move synchronously, entering the sight mark swing test, and continuing to obtain the a2 value and comparing it with a1 to determine whether the test is successful.

[0013] As an improvement to the vision detection method, in step S1, the test scheme further includes an amplitude value of the synchronous movement of the sight mark to control the movement amplitude of the sight mark during the swing test.

[0014] A vision detection device adopts the above-mentioned vision detection method. The vision detection device includes a device body, a rotating component that can drive the device body to rotate and swing back and forth, and a plurality of test rods arranged on the device body. The test rods are movable sight marks. The device body is provided with an adjustment component that cooperates with the test rods. The adjustment component can drive the test rods to move and retract into the device body, and extend outward from the device body to be in use.

[0015] As an improvement to the vision detection device, the device body has a plurality of slide grooves for installing the test rod, and the plurality of slide grooves are distributed at intervals along the edge of the device body.

[0016] As an improvement of the vision detection device, the adjustment component includes a magnet, a power supply module, and a first electromagnet and a second electromagnet respectively installed on the bottom and the slot of the slide groove; the magnet is arranged at the inner end of the test rod, and the magnet cooperates with the first electromagnet and the second electromagnet.

[0017] As an improvement to the vision detection device, it further includes a sensor, which is arranged on the device body, and the sensor is used to sense and obtain the distance between the device body and the tester.

[0018] As an improvement to the vision detection device, the device body further includes a control mainboard electrically connected to the rotating component and the adjusting component.

[0019] As an improvement to the vision detection device, the rotating assembly includes a mounting seat, a gear mounted on the mounting seat, and a driver. The device body is rotatably connected to the mounting seat and is provided with arc-shaped teeth that engage with the gear. The driver can drive the gear to rotate reciprocatingly to drive the device body to swing reciprocatingly.

[0020] As an improvement to the vision detection device, it further includes a linear moving component, the output end of which is connected to the rotating component, for driving the device body to move linearly to adjust the distance between the device and the tester.

[0021] As an improvement of the vision detection device, the linear moving component includes a bracket and a guide rod, a screw rod, and a drive motor arranged on the bracket. The guide rod is arranged parallel to the screw rod and is slidingly connected to the rotating component. The screw rod is threadedly connected to the rotating component. The drive motor can drive the screw rod to rotate to control the movement of the device body.

[0022] The beneficial effects of the present invention are as follows: This vision testing method uses multiple movable sight marks and a pre-set test protocol. This pre-set test protocol, including the number of tests, the number of sight marks, and the duration of each test, allows for personalized adjustments based on the needs and vision of individual test subjects, thereby improving the pertinence and effectiveness of the test. This method accurately assesses the test subject's vision level in a relatively short period of time, reducing the fatigue and discomfort associated with repeated testing and prolonged static gaze. It also avoids the errors associated with content fixation and memory effects in traditional vision tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0024] Figure 1 is a flow chart of the vision testing method;

[0025] Figure 2 This is one of the structural diagrams of the vision detection device;

[0026] Figure 3 It is a cross-sectional view of part of the structure of the vision testing device;

[0027] Figure 4 is a side view of the vision testing device;

[0028] Figure 5 This is the second structural diagram of the vision detection device;

[0029] Figure 6 It is a structural schematic diagram of the test rod of the vision detection device.

[0030] In the figure: 1. Device body; 11. Slide; 2. Test rod; 3. Rotating assembly; 31. Mounting base; 32. Gear; 33. Arc teeth; 34. Driver; 4. Adjusting assembly; 41. Magnet; 42. Power module; 43. First electromagnet; 44. Second electromagnet; 5. Sensor; 61. Bracket; 62. Guide rod; 63. Screw; 64. Drive motor. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0032] like Figure 1 As shown, a vision detection method comprises the following steps:

[0033] S1. Set up a plurality of movable sight signs for the tester to test, and preset a test plan, which includes the number of tests, the number of sight signs used in each test, and the time for each sight sign to be used;

[0034] S2. When the tester arrives at the test location, the preset test plan is executed to obtain the number a2 of visual signs identified by the tester in the used state in each test;

[0035] S3. Compare the value of a2 with the value of a1. If a2 and a1 are equal, the test is considered successful, and the distance between the tester and the sight mark is obtained and recorded. If a2 and a1 are not equal, the test is considered failed.

[0036] S4. After the test is finally determined to have failed in step S3, the distance between the tester and the sight mark is shortened by N cm, and the process is traced back to the node of step S2 and retested until the test is determined to have succeeded.

[0037] According to the number of movable sight marks set, the corresponding test scheme is preset, and the a1 value in the test scheme shall not be higher than the number of movable sight marks set. When the tester moves to the test position, the test scheme is executed. By comparing the a2 value obtained in each test in the test scheme with the corresponding a1 value set, if the a2 value obtained in any test is equal to the a1 value, the test is judged to be successful; if the a2 value obtained in the test is not equal to the a1 value, the test is judged to have failed, which means that the distance between the sight mark and the tester is too large, resulting in the sight mark in the tester's eyes being too small or blurred, making it difficult for the tester to accurately identify the number of sight marks, and thus the test is judged to have failed. Therefore, after shortening the distance between the tester and the sight mark by Ncm, the test is traced back to the step S2 node and retested until the test is judged to be successful.

[0038] This vision testing method uses multiple movable sight marks and pre-set test protocols. These protocols, including the number of tests, the number of sight marks, and the duration of each test, allow for personalized adjustments based on the individual tester's needs and vision, thereby enhancing the test's relevance and effectiveness. This method accurately assesses a tester's vision level in a relatively short period of time, reducing the fatigue and discomfort associated with repeated testing and prolonged static gaze. This method also avoids the errors associated with content fixation and memory effects in traditional vision testing.

[0039] In addition, by regularly using this method for vision testing, the tester can understand his or her vision condition in a timely manner and take corresponding protective measures, such as adjusting eye habits and conducting vision training, which helps prevent and slow down vision loss.

[0040] In a further embodiment, in step S3, when it is determined that the test has failed, the test plan is executed again, and in each test, the sight mark in use is controlled to move synchronously, entering the sight mark swing test, and continuing to obtain the a2 value and compare it with a1 to determine whether the test is successful.

[0041] The mobility of the sight mark increases the randomness and difficulty of the test, making the test results more realistically reflect the tester's vision level. Introducing a test method that synchronizes sight mark movement when the tester makes an error not only increases test diversity but also helps dynamically assess the tester's vision, especially their ability to process dynamic visual information.

[0042] In a further embodiment, after the test is determined to be successful in step S3, to further improve test accuracy, the distance between the test subject and the sight mark is extended by N cm, and the test is repeated back to step S2 until the test is determined to have failed. The test result is the test result for the test subject at the last successful test. Furthermore, the test scenario with the most tests, where a2 = a1, has the distance between the test subject and the sight mark as the test subject's optimal visual distance. This allows the test subject's visual acuity limit and optimal visual distance to be determined, improving the accuracy and comprehensiveness of the test results.

[0043] Furthermore, in step S3, if the tester identifies the correct number of sight marks used in one test, the test is determined to be successful and the distance between the tester and the sight mark is recorded.

[0044] Specifically, if N > 0, the tester can correctly identify the number of sight marks, indicating that their vision level is in line with expectations under the current test conditions. The recorded spacing data can serve as an important basis for evaluating the tester's vision condition. Furthermore, the spacing between the sight marks and the tester can be increased as needed to obtain more accurate test data and detect the tester's vision limits. The recorded spacing data can serve as a benchmark for subsequent vision monitoring, helping to promptly detect vision changes and take appropriate measures. Once the tester successfully identifies the number of sight marks used, the current test can be ended immediately, without the need for additional testing or adjustments, thereby improving test efficiency.

[0045] Furthermore, if the test subject identifies correctly in one test but incorrectly in other tests, this data can provide a basis for subsequent adjustments to the personalized test plan to better suit the test subject's vision condition and needs.

[0046] Furthermore, in step S1, the test plan also includes an amplitude value of the synchronous movement of the sight mark to control the movement amplitude of the sight mark during the swing test. By setting the amplitude value of the synchronous movement of the sight mark, it is possible to ensure that the movement range and speed of the sight mark remain consistent during each swing test, thereby standardizing the test conditions and improving the accuracy and comparability of the test results. By adjusting the amplitude value of the movement of the sight mark, the difficulty of the test can be adjusted individually according to the tester's vision condition and test requirements. For testers with better vision, the movement amplitude can be increased to increase the challenge of the test; for testers with poorer vision, the movement amplitude can be reduced to reduce the difficulty of the test.

[0047] The setting of synchronous movement of sight marks may make some vision problems that are difficult to detect in static tests appear in dynamic tests, thereby improving the sensitivity and specificity of the test. It helps to detect vision problems in a timely manner and take appropriate intervention measures.

[0048] In a further embodiment, the a2 value may be obtained by voice recognition. After a single test is completed, the tester outputs the number of sight marks identified as being in use through voice, and the a2 value is obtained after receiving and recognizing the voice.

[0049] Speech recognition involves setting up a speech recognition module, which includes at least a microphone and a speech recognition chip. The microphone is used to collect the test subject's voice commands and convert the test subject's voice signals into electrical signals for subsequent processing. The speech recognition chip is responsible for processing and recognizing the collected voice signals. The speech recognition chip analyzes the voice signals using a built-in algorithm to obtain and output the a2 value.

[0050] In some other embodiments, the a2 value may be obtained by data input. After a single test is completed, the tester manually inputs the number of sight marks identified as being in use to obtain the a2 value.

[0051] The data input method is specifically to set a data input module including an input keyboard, and manually control the keyboard to input the number a2 of visual signs in use identified by the tester, thereby obtaining the a2 value and outputting it externally.

[0052] It should be noted that this vision recognition method also utilizes a data storage module and a data processing module. The data storage module is used to receive the acquired a2 value and send it to the data processing module, as well as store the recorded distance value between the test subject and the sight mark. The data processing module is used to receive the a2 value sent by the data storage module, compare it with the preset a1 value, and determine whether the test is successful, completing data processing. The values ​​of the test plan can be preset by the data processing module, including but not limited to the number of tests, the number of sight marks used in each test a1, the duration of a single sight mark usage, the amplitude of the synchronous movement of the sight mark, and the value of N.

[0053] The data storage module includes storage hard disks (SSDs) or hard disk drives (HDDs) and a storage controller. Within the data storage module, appropriate quantities and specifications of SSDs or HDDs can be selected to form a storage array, such as a RAID array, to improve data reliability and read / write performance. The storage controller manages read and write operations on the SSDs or HDDs, ensuring that data is stored efficiently and accurately on the storage medium.

[0054] The data processing module is a processor (CPU) or digital signal processor (DSP), which is responsible for executing complex computing tasks and data processing algorithms, and is used to process various information in the test plan and compare and analyze information, and draw conclusions according to preset algorithms.

[0055] In some other embodiments, the movable sight mark can be multiple marks on the display, and when the marks are controlled to emit light, they are in use; when the sight mark is swung test, the marks emitting light are controlled to move back and forth to form a swung state, so that the tester can perform the swung test.

[0056] The present invention will be further described below through specific embodiments:

[0057] Example 1

[0058] Testing method: A pre-set test protocol is used, with each sight mark lasting 10 seconds. At the start of the test, the initial distance between test subject A and the sight mark is set to 100 cm. The a2 value is obtained for each test; it is compared with the a1 value. If a2 and a1 are equal, the test is considered successful. The distance between the test subject and the sight mark is obtained and recorded. If a2 and a1 are not equal, the test is considered failed.

[0059] This test plan was used to test testers A, B, C, and D. The test results are shown in the following table:

[0060] Table 1 is one of the vision test data tables for testers A, B, C, and D.

[0061]

[0062] In this embodiment, a preset test plan was used to set up five movable sight signs, and the vision of test subjects A, B, C, and D was tested. In the test plan, each sight sign was used for 10 seconds, and the test subject's vision level was determined based on their response.

[0063] Tester A successfully identified all the visual signs presented in the three tests, indicating that tester A had good vision at the current test distance and was able to accurately identify the visual signs. The test successfully recorded the distance between the tester and the visual signs, 100 cm, and the number of correct identification tests, 3 times. This distance can be used as a reference for assessing his vision level.

[0064] Test subject B successfully identified all the visual signs in the first two tests, but failed to accurately identify all the visual signs in the third test. However, since the first two tests were successfully identified, the test was also judged to be successful, and the distance of 100 cm and the number of correctly identified tests, 2, were recorded. It can be assumed that test subject B has good visual recognition ability in most cases.

[0065] Tester C only successfully identified all the visual marks on the first test. According to the determination method of a2=a1, tester C is still determined to have succeeded in the test and the distance of 100 cm and the number of correct identification tests are recorded as 1; this also reflects that this is the maximum visual distance of tester C.

[0066] If subject D fails to accurately identify all optotypes in all three tests, this indicates that his or her vision at the current test distance is insufficient to clearly identify all optotypes. The test is considered a failure, and the distance between the subject and the optotype is recorded as 100 cm, and the number of correct identifications is 0. Furthermore, according to the test plan, a prompt may be given to shorten the distance between the subject and the optotypes and retest.

[0067] Example 2

[0068] Detection method: Preset the test plan, and the single use time of each sight mark is 10 seconds. At the beginning of the test, the initial distance between tester A and the sight mark is set to 100 cm. Obtain the a2 value in each test; compare the a2 value with the a1 value. When a2 is equal to a1, the test is considered successful, and the distance between the tester and the sight mark is obtained and recorded; when a2 and a1 are not equal, the test is considered failed; if the test is finally determined to have failed, shorten the distance between the tester and the sight mark by N cm, N = 10 cm; go back to step S2 node and retest until the test is determined to be successful.

[0069] This test plan was used to test testers A, B, C, and D. The test results are shown in the following table:

[0070] Table 2 is the second table of vision test data for testers A, B, C, and D

[0071]

[0072] In this embodiment, the vision testing method is further optimized. Not only is a pre-set test protocol implemented, including a 10-second single-use time limit for each sight mark, but if the subject fails to accurately identify all sight marks, the test is repeated by shortening the distance between the subject and the sight mark until the test is successful. This method provides a more detailed vision assessment for subjects A, B, C, and D.

[0073] In all three tests, test subject A successfully identified all the visual signs presented, even at the initial distance. The test was deemed successful, and the distance of 100 cm and the number of correctly identified tests (3) were recorded. This indicates that test subject A's vision was good at this viewing distance and there was no need to adjust the test distance.

[0074] Tester B successfully identified all visual signs in the first two tests, but failed to identify them completely accurately in the third test; the test was judged to be successful, and the distance of 100 cm and the number of correct identifications (2) were recorded.

[0075] In the three tests, tester C only successfully identified all the visual marks in the first test. According to the determination method of a2=a1, tester C is still determined to have succeeded in the test and the distance of 100 cm and the number of correct identification tests are recorded as 1; this reflects that this is the maximum visual distance of tester C.

[0076] Tester D failed to successfully identify all optotypes in three tests at the initial viewing distance. However, after shortening the distance to 90cm and retesting, Tester D successfully identified all active optotypes in three tests. The distance of 90cm and the number of correct identifications recorded were three. This verified Tester D's vision and provided key data for their vision assessment. It also indicated that Tester A's vision was good at this viewing distance, and no further adjustment of the testing distance was required.

[0077] Example 3

[0078] Detection method: Preset the test plan, and the single use time of each sight mark is 10 seconds. At the beginning of the test, the initial distance between the tester A and the sight mark is set to 110cm. Obtain the a2 value in each test; compare the a2 value with the a1 value. When a2 and a1 are equal, the test is considered successful, and the distance between the tester and the sight mark is obtained and recorded; when a2 and a1 are not equal, the test is considered failed, and then the test is repeated, and the sight mark swing test is entered; obtain the a2 value in the sight mark swing test and compare it with the a1 value again; if the test is still judged to have failed, shorten the distance between the tester and the sight mark by Ncm, N=10cm; go back to the step S2 node and retest until the test is determined to be successful.

[0079] This test plan was used to test testers A, B, C, and D. The test results are shown in the following table:

[0080] Table 3 is the third table of vision test data for testers A, B, C, and D

[0081]

[0082]

[0083] In this embodiment, the vision testing method is further optimized by introducing a sight mark wiggling test. If the test subject fails to accurately identify all sight marks, the test is reassessed by shortening the spacing and performing a sight mark wiggling test until the test is successful. In this way, the vision of test subjects A, B, C, and D is tested and assessed.

[0084] In all three tests, test subject A successfully identified all the visual signs presented, even at the initial distance. The test was deemed successful, and the distance of 110 cm and the number of correctly identified tests, 3, were recorded. This indicates that test subject A's vision was good at this viewing distance and there was no need to adjust the test distance.

[0085] Test subject B was unable to fully and accurately identify the optotypes in the static test at a distance of 110 cm. However, after entering the optotype swing test, he successfully identified all optotypes in the first two tests. The test was judged to be successful, and the distance of 110 cm and the number of correct identification tests were recorded as 2.

[0086] Tester C failed all three static tests at a distance of 110 cm and entered the swing sight mark test, but failed to identify the sight marks in all three tests. By shortening the distance to 100 cm and re-executing the test plan, only the first test of the three static tests at a distance of 110 cm successfully identified all the sight marks. According to the judgment method of a2=a1, tester C was still judged to have succeeded in the test and the distance of 100 cm and the number of correctly identified tests were recorded as 1, which reflected that this was the maximum visual distance for tester C.

[0087] When the distance was 110 cm, tester D failed both the static test and the sight mark swing test. After shortening the distance to 100 cm, he failed to correctly identify the sight marks in three static tests. However, in the sight mark swing test, he accurately identified the number of sight marks in use in the first two tests. The test was judged to be successful, and the distance of 100 cm and the number of correct identification tests were recorded as 2.

[0088] After testing Examples 1-3, it was concluded that this vision detection method significantly improves the accuracy and reliability of the test by presetting the test scheme, introducing movable sight marks and a dynamic spacing adjustment mechanism. Compared with traditional static vision tests, this method can more realistically reflect the tester's vision level and reduce errors caused by content fixation and memory effects. The test scheme supports personalized adjustments based on the needs and vision conditions of different testers, including the number of tests, the number of sight marks, the single use time, and the spacing, etc., which improves the pertinence and effectiveness of the test. The sight mark swing test link introduced in Example 3 makes the test not only limited to static vision assessment, but also covers dynamic vision assessment, and more comprehensively understands the tester's visual ability. The test can not only accurately obtain the tester's vision level, but also record the optimal spacing between the tester and the sight mark and the vision limit, providing comprehensive data support for subsequent vision monitoring and health care.

[0089] In another embodiment, Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, the present application provides a vision detection device, which adopts the above-mentioned vision detection method, including a device body 1, a rotating component 3 that can drive the device body 1 to rotate and swing back and forth, and 5 test rods 2 arranged on the device body 1. The test rods 2 serve as movable sight marks. The device body 1 is provided with an adjustment component 4 that cooperates with the test rods 2. The adjustment component 4 can drive the test rods 2 to move and retract into the device body 1, as well as extend outward from the device body 1 to be in use.

[0090] Specifically, five test rods 2 are located on the upper part of the device body 1 and serve as movable sight marks. The rotating component 3 is connected to the lower part of the device body 1, and the five test rods 2 and the device body 1 form a palm shape. The test rods 2 extend and retract to simulate the expansion and contraction of the fingers of the palm. The test rods 2 are in the use state after being extended. When it is necessary to use this device to test the eyesight of the tester, the device can be moved to a preset distance from the tester first, and then driven by the adjustment component 4 to extend some or all of the test rods 2 to the use state, thereby simulating the fingers to be in the expanded state. The tester observes and identifies the number of test rods 2 in the use state; if the identification is correct, the distance between the tester and the device body 1 at this time is recorded; if the identification is wrong, the rotating component 3 is started according to the demand to drive the device body 1 to swing back and forth, thereby driving the test rods 2 in the use state to swing synchronously, to simulate the swinging action of the fingers after expansion. The tester identifies the number of test rods 2 that swing synchronously, thereby performing a sight mark swing test, thereby achieving the purpose of detecting the strength of his or her vision.

[0091] This detection device can flexibly adjust the amount of extension of the test rod 2 and the swing of the device body 1 according to the test requirements, providing a personalized testing experience. By simulating the dynamic changes of the fingers, the tester's vision is tested, and the repetitiveness of the vision test content of the same tester is reduced, thereby improving the accuracy of the vision test. In addition, during the test process, there is no need to use one's own palm for testing, which reduces labor costs and improves test efficiency. It also increases the fun and interactivity of the test process, which helps to improve the tester's participation and enthusiasm.

[0092] Specifically, the voice recognition module, data input module, data storage module and data processing module are all provided in the device body 1. In other embodiments, the voice recognition module, data input module, data storage module and data processing module can also be connected to the device body 1 in an external manner.

[0093] In other embodiments, the adjustment assembly further comprises a spring, a locking mechanism, and a trigger mechanism. A spring is mounted within the test rod 2, and the locking mechanism locks the test rod 2 within the device body 1. When the test rod 2 is to be extended, the trigger mechanism releases the locking mechanism, and the spring force automatically extends the test rod 2. To retract, an external force (e.g., manual or motor-driven) pushes the test rod 2 back and relocks it.

[0094] In other embodiments, the structure of the adjustment component also includes a reduction motor, a connecting rod mechanism, and a guide rail. The reduction motor drives the connecting rod mechanism to move. The connecting rod mechanism is connected to the test rod 2. Through the set connecting rod transmission path, the test rod 2 can be extended or retracted. This structure can control the movement range of the test rod 2 by adjusting the length and angle of the connecting rod.

[0095] In other embodiments, the number of the test sticks 2 can be set to 2, 3, 4, 6, 7 or 8 according to requirements.

[0096] Furthermore, the device body 1 has five chutes 11 for mounting the test rod 2. The five chutes 11 are spaced apart along the edge of the device body 1. Specifically, the five chutes 11 are evenly or spaced apart along the edge of the device body 1, allowing the test rod 2 to move along the track of the chutes 11 and ensuring the stability and accuracy of the test rod 2 during movement.

[0097] In some embodiments of the present application, the adjustment component 4 includes a magnet 41, a power supply module 42, and a first electromagnet 43 and a second electromagnet 44 respectively installed at the bottom and the slot of the slide groove 11. The magnet 41 is arranged at the inner end of the test rod 2, and the magnet 41 cooperates with the first electromagnet 43 and the second electromagnet 44.

[0098] Specifically, the bottom and the slot mouth of the slide 11 are respectively provided with a first electromagnet 43 and a second electromagnet 44 with opposite magnetic forces. A magnet 41 is provided at the inner end of each test rod 2. The magnet 41 is located between the first electromagnet 43 and the second electromagnet 44. The power supply module 42 provides electrical energy to the first electromagnet 43 and the second electromagnet 44 to generate a magnetic field, and can adjust the power on, power off and magnetic direction of the first electromagnet 43 and the second electromagnet 44.

[0099] When a preset number of test rods 2 need to be extended, the power module 42 energizes the first electromagnet 43 and the second electromagnet 44 in the corresponding chute 11. At this time, the magnetism of the first electromagnet 43 is the same as that of the magnet 41, and the magnetism of the second electromagnet 44 is opposite to that of the magnet 41. Due to the magnetic principle that like charges repel and opposite charges attract, the first electromagnet 43 and the second electromagnet 44 drive the magnet 41 toward the slot of the chute 11 through magnetic force until the second electromagnet 44 is attracted to the magnet 41, so that the test rods 2 are extended outward and in an expanded state for observation and detection by the tester. However, when a preset number of test rods 2 need to be retracted, the power module 42 adjusts the magnetism of the first electromagnet 43 to be opposite to that of the magnet 41 and the magnetism of the second electromagnet 44 to be the same as that of the magnet, pushing the magnet 41 toward the bottom of the chute 11, so that the test rods 2 are retracted into the chute 11 and in a contracted state. The power supply module 42 can adjust the power on and off of the first electromagnet 43 and the second electromagnet 44 and the direction of the magnetic force, thereby achieving precise control of the extension and retraction of the test rod 2.

[0100] In addition, by providing a corresponding number of first electromagnets 43 and second electromagnets 44 to cooperate with the magnet 41 of the test rod 2, the purpose of extending and retracting the test rod 2 can be achieved, thereby reducing production costs, simplifying the structure, and eliminating the need for excessive driving elements (such as motors, cylinders, electric push rods, etc.). At the same time, it also reduces the weight of the device body 1 and reduces the operating load of the rotating component 3.

[0101] Some embodiments of the present application further include a sensor 5, disposed within the device body 1, for sensing the distance between the device body 1 and the subject. The sensor 5 continuously monitors the distance between the device body 1 and the subject. The sensor 5 is an infrared sensor. The measured distance information is converted into an electrical signal or other easily processable signal format and transmitted to the control board for viewing by personnel. The personnel can then adjust the position of the device based on the detected distance.

[0102] The sensor 5 enables the device to sense changes in the tester's position and adjust the state of the test stick 2 or issue prompts accordingly, thereby achieving intelligent interaction with the tester.

[0103] In other embodiments, the sensing mode of the sensor 5 can be set to infrared sensing mode, ultrasonic sensing mode, laser ranging sensing mode, etc. according to needs).

[0104] In some embodiments of the present application, the device body 1 also includes a control mainboard electrically connected to the rotating component 3 and the adjusting component 4. The control mainboard receives the user's operating instructions, and accurately controls the operation of the rotating component 3 and the adjusting component 4 through circuit connections, thereby achieving efficient data transmission and control signal transmission. When the user requires the device to swing, the number of test rods 2 extended once and multiple times can be preset by controlling the mainboard, and it can be determined whether to swing, thereby forming a detection plan and archiving it on the control mainboard. The control mainboard then sends instructions to the rotating component 3 and the power module 42 according to the corresponding detection plan. After receiving the instruction signal, the power module 42 uses magnetic force to drive the corresponding test rod 2 to extend and retract. After receiving the instruction signal, the rotating component 3 drives the device body 1 to swing back and forth at the corresponding time point. The centralized control of the control mainboard improves the degree of automation of the device and reduces manual intervention.

[0105] In some embodiments of the present application, the control mainboard includes a data storage module. By adding the data storage module to the control mainboard, the test data and test results of the tester are recorded to facilitate subsequent analysis and comparison.

[0106] In some embodiments of the present application, the rotating assembly 3 includes a mounting base 31, a gear 32 mounted on the mounting base 31, and a driver 34. The device body 1 is rotatably connected to the mounting base 31 and is provided with arc-shaped teeth 33 that engage with the gear 32. The driver 34 can drive the gear 32 to rotate reciprocatingly to drive the device body 1 to swing back and forth.

[0107] Specifically, the driver 34 is a motor. After the driver 34 is started, it generates power and transmits it to the gear 32, driving the gear 32 to rotate; the gear 32 engages with the arc-shaped teeth 33 on the device body 1, thereby converting the rotational motion of the gear 32 into the swinging motion of the device body 1. Therefore, the detection device is controlled by the driver 34, and the gear 32 rotates back and forth (forward and reverse), thereby causing the device body 1 to achieve a reciprocating swinging motion. The dynamic test method can more comprehensively evaluate the test subject's vision, including the visual response ability to different movement directions and speed changes. By adjusting the parameters of the driver 34, such as the speed and rotation direction, the swing speed and frequency of the device body 1 can be easily controlled to meet different test requirements.

[0108] It should be noted that the arc-shaped teeth 33 are formed by a plurality of teeth spaced apart along the lower edge of the device body 1 .

[0109] In some embodiments of the present application, Figure 5 As shown, it also includes a linear moving component, the output end of which is connected to the rotating component 3, for driving the device body 1 to move linearly to adjust the distance between the device and the tester.

[0110] In some embodiments of the present application, the linear moving component includes a bracket 61 and a guide rod 62, a screw rod 63, and a drive motor 64 arranged on the bracket 61. The guide rod 62 is arranged parallel to the screw rod 63 and is slidingly connected to the rotating component 3. The screw rod 63 is threadedly connected to the rotating component 3. The drive motor 64 can drive the screw rod 63 to rotate to control the movement of the device body 1.

[0111] Specifically, the screw rod 63 is threadedly connected to the mounting base 31. When the distance between the test rod 2 and the tester needs to be adjusted, the drive motor 64 can be started to drive the screw rod 63 to rotate. Since the screw rod 63 is threadedly connected to the rotating component 3, the rotational movement of the screw rod 63 will be converted into a linear movement of the rotating component 3, thereby driving the device body 1 to move, and the guide rod 62 guides the rotating component 3 to ensure the stability and accuracy of the movement process.

[0112] The setting of the linear moving component can accurately adjust the distance between the device and the tester as needed, ensuring that the test is performed at the optimal distance, thereby improving the accuracy and comfort of the vision test.

[0113] In other embodiments, the structure of the linear motion component can also be set as a cylinder drive structure, a hydraulic cylinder drive structure, a linear motor structure or a chain / belt drive structure to drive the device body 1 to move linearly to adjust the distance between the device and the tester.

[0114] In some embodiments of the present application, both the mounting base 31 and the linear motion assembly are equipped with a level. These two levels monitor the vertical and longitudinal levelness of the device body 1 to maintain stability during operation and ensure good testing results. This addresses the issue of prolonged hand swinging during manual testing, which can lead to fatigue and a tilted palm.

[0115] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for visual acuity detection, characterized in that: Here are the steps: S1. Set up a plurality of movable sight signs for the tester to test, and preset a test plan, which includes the number of tests, the number of sight signs used in each test, and the time for each sight sign to be used; S2. When the tester arrives at the test location, the preset test plan is executed to obtain the number a2 of visual signs identified by the tester in the used state in each test; S3. Compare the value of a2 with the value of a1. If a2 and a1 are equal, the test is considered successful, and the distance between the tester and the sight mark is obtained and recorded. If a2 and a1 are not equal, the test is considered failed. In step S3, when the test is determined to have failed, the test plan is executed again, and in each test, the sight mark in use is controlled to move synchronously, entering the sight mark swing test, and the a2 value is continuously obtained and compared with a1 to determine whether the test is successful; S4. After the test is finally determined to have failed in step S3, the distance between the tester and the sight mark is shortened by N cm, and the process is traced back to the node of step S2 and retested until the test is determined to have succeeded.

2. The vision detection method according to claim 1, characterized in that: In the step S1, the test scheme further includes an amplitude value of the synchronous movement of the sight mark to control the movement amplitude of the sight mark during the swing test.

3. A vision detection device, characterized in that: The vision detection method described in any one of claims 1-2 above is adopted, and the vision detection device includes a device body, a rotating component that can drive the device body to rotate and swing back and forth, and a plurality of test rods arranged on the device body, the test rods are movable sight marks, and the device body is provided with an adjustment component that cooperates with the test rods, and the adjustment component can drive the test rods to move and retract into the device body, and extend outward from the device body to be in use.

4. The vision detection device according to claim 3, characterized in that: The device body has a plurality of slide grooves for installing the test rods, and the plurality of slide grooves are distributed at intervals along the edge of the device body.

5. The vision detection device according to claim 4, characterized in that: The adjustment component includes a magnet, a power supply module, and a first electromagnet and a second electromagnet respectively installed on the bottom and the slot of the slide groove. The magnet is arranged at the inner end of the test rod, and the magnet cooperates with the first electromagnet and the second electromagnet.

6. The vision detection device according to claim 5, characterized in that: The device further comprises a sensor, which is arranged on the device body and is used to sense and obtain the distance between the device body and the tester.

7. The vision detection device according to any one of claims 3 to 6, characterized in that: The device body also includes a control mainboard electrically connected to the rotating component and the adjusting component.

8. The vision detection device according to claim 7, characterized in that: The rotating assembly includes a mounting seat, a gear mounted on the mounting seat and a driver. The device body is rotatably connected to the mounting seat and is provided with arc-shaped teeth that engage with the gear. The driver can drive the gear to rotate reciprocatingly to drive the device body to swing reciprocatingly.

9. The vision detection device according to claim 8, characterized in that: It also includes a linear motion component for adjusting the distance between the device body and the tester, and the linear motion component includes a bracket and a guide rod, a screw rod, and a drive motor arranged on the bracket. The guide rod is arranged parallel to the screw rod and is slidingly connected to the rotating component. The screw rod is threadedly connected to the rotating component. The drive motor can drive the screw rod to rotate to control the movement of the device body.

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