WO2022033016A1 - 一种判断手表走时精度是否合格的视觉测试方法及系统 - Google Patents
一种判断手表走时精度是否合格的视觉测试方法及系统 Download PDFInfo
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- WO2022033016A1 WO2022033016A1 PCT/CN2021/078902 CN2021078902W WO2022033016A1 WO 2022033016 A1 WO2022033016 A1 WO 2022033016A1 CN 2021078902 W CN2021078902 W CN 2021078902W WO 2022033016 A1 WO2022033016 A1 WO 2022033016A1
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- watch
- time
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- 230000000007 visual effect Effects 0.000 title claims abstract description 50
- 238000010998 test method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 239000000470 constituent Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V2201/00—Indexing scheme relating to image or video recognition or understanding
- G06V2201/02—Recognising information on displays, dials, clocks
Definitions
- the invention relates to the technical field of watch manufacturing, in particular to a visual testing method and system for judging whether the travel time accuracy of a watch is qualified.
- the composite watch integrates the advantages of traditional mechanical watches and emerging smart watches, that is, the smart module is implanted into the mechanical watch, and the mobile phone application corresponding to the watch sends time information to the smart module through Bluetooth, and the smart module is controlled by a motor.
- the rotor rotates to adjust the hour and minute hands, making the mechanical watch intelligent.
- the composite watch needs to combine the mechanical watch with the intelligent module, it has high requirements on the movement and assembly. After the assembly is completed, the hands are often inaccurate and the deviation is large. In order to prevent such unqualified products from entering the market, Affecting the user experience, it is necessary to detect the travel time accuracy of the watch.
- the technical problem to be solved by the present invention is to provide a visual test method for judging whether the travel time accuracy of a watch is qualified, so as to accurately test the travel time accuracy of a watch product.
- Another technical problem to be solved by the present invention is to provide a visual test system for judging whether the travel time accuracy of a watch is qualified, and the visual test system can be used to implement the above-mentioned visual test method.
- the technical solution adopted in the invention is to provide a visual test method for judging whether the travel time accuracy of a watch is qualified, and the visual test method comprises the following steps:
- step S1 the difference test is performed on the watch to be tested, and after the period x is set, the difference test is performed on the watch to be tested again; wherein, the difference test includes the following steps:
- Step S11 taking a picture of the dial of the watch to be tested, synchronously saving the dial picture obtained by taking the photo and the system time at the time of taking the photo, and repeating this n times to obtain n dial pictures and n dial pictures corresponding to the n dial pictures respectively.
- System time, n is a natural number greater than or equal to 1;
- step S12 time identification is performed on the n dial pictures respectively, so as to obtain n picture times corresponding to the n dial pictures one-to-one respectively;
- Step S13 respectively calculating the difference between the picture time corresponding to the same dial picture and the system time, so that n difference values are obtained;
- Step S14 judging whether the number m of differences with the same value among the n differences satisfies m/n ⁇ k;
- Step S15 if yes, record the difference between the picture time and the system time corresponding to the dial picture obtained by taking the first photo in step S11 as the test result; if not, jump to step S11;
- Step S2 Calculate whether the difference ⁇ T of the test results of the two difference tests is smaller than a preset threshold; if so, judge that the running accuracy of the watch to be tested is qualified; if not, judge that the running accuracy of the watch to be tested is unqualified .
- the process of performing time recognition on the dial picture includes the following steps:
- Step S121 identifying the crown position, hour hand, minute hand, and second hand in the dial picture
- Step S123 calculating the clockwise angle of the hour hand, minute hand and second hand relative to the 12H position according to the crown position and the preset time position of the crown;
- Step S124 Calculate the picture time for the dial picture according to the clockwise angle of the hour hand, the minute hand, and the second hand relative to the 12H position.
- the process of performing time recognition on the dial picture further includes the following steps:
- step S122 it is judged whether the identification of the crown position, the hour hand, the minute hand, and the second hand is successful; if it is successful, it goes to step S123; if it fails, it jumps to step S121.
- the process of performing time recognition on the dial picture further includes the following steps:
- Step S125 correcting the picture time that does not conform to the order of the pictures according to the time relationship between the system time and the picture time.
- the process of calculating the difference between the picture time corresponding to the same dial picture and the system time includes the following steps:
- Step S131 converting the picture time and system time corresponding to the same dial picture into a time value in seconds
- Step S132 making a difference between the two obtained time values to obtain a corresponding difference value.
- n ⁇ 8 In the visual test method for judging whether the travel time accuracy of a watch is qualified or not provided by the present invention, n ⁇ 8.
- the value of k is 0.7.
- the dial of the watch to be tested is photographed, and the dial picture obtained by taking the photograph and the system time when the photograph is taken are stored synchronously. Repeat once per second, for a total of n times.
- the technical solution adopted by the invention provides a visual test system for judging whether the travel time accuracy of a watch is qualified, and the visual test system includes:
- the camera module arranged just above the tray;
- a processing module signally connected to the camera module
- the processing module is used to control the visual testing system to implement the above-mentioned visual testing method.
- the visual recognition system further includes an upper light-emitting module and a lower light-emitting module; the upper light-emitting module is arranged between the camera module and the tray; the lower light-emitting module arranged below the tray; the upper light-emitting module and the lower light-emitting module are both used for irradiating light toward the watch to be tested on the tray.
- step S14 the validity of the obtained data is judged (ie, step S14) to ensure that each difference
- the test results obtained by the value test are valid and reliable.
- the calculated picture time is corrected through the contextual relationship between multiple sets of data, which increases the validity of the data.
- the difference test of one stage is completed, and after the preset period x has passed, the difference test of the next stage is carried out. In this way, by judging whether the difference ⁇ T of the test results of the two difference tests is less than the preset threshold, It can accurately test the travel time accuracy of watch products.
- Fig. 1 is the step flow chart of the visual testing method provided by the first embodiment of the present invention
- Fig. 2 is the step flow chart of the difference test in the visual test method provided by the embodiment of the present invention.
- FIG. 3 is a flow chart of the steps of the process of performing time recognition on the dial picture in the visual testing method provided in Embodiment 1 of the present invention.
- FIG. 4 is a flow chart of the steps of the process of calculating the difference between the picture time and the system time corresponding to the same dial picture in the visual testing method provided in Embodiment 1 of the present invention
- FIG. 5 is a schematic structural diagram of a visual testing method according to Embodiment 2 of the present invention.
- first and second used in this specification can be used to describe various constituent elements, but these constituent elements are not limited by these terms. These terms are used only to distinguish one element from another.
- first constituent element can be named as the second constituent element, and similarly, the second constituent element can also be named as the first constituent element.
- This embodiment provides a visual test method for judging whether the travel time accuracy of a watch is qualified.
- the visual testing method includes the following steps S1 and S2.
- the step S1 is to perform a difference test on the watch to be tested, and after setting a period x, perform a difference test on the watch to be tested again; in this embodiment, x is set to 24 hours;
- the difference test includes the following steps:
- Step S11 take a picture of the dial of the watch to be tested, and synchronously save the dial picture obtained by taking the photo and the system time when taking the photo.
- n is a natural number greater than or equal to 1; in this embodiment, the value of y is 1, and the value of n is 8.
- the system time an example is explained as follows.
- step S12 time identification is performed on the n dial pictures respectively, so as to obtain n picture times corresponding to the n dial pictures one-to-one respectively;
- the process of performing time recognition on the dial picture includes the following steps:
- Step S121 identifying the crown position, hour hand, minute hand, and second hand in the dial picture
- Step S122 judging whether the recognition of the crown position, hour hand, minute hand, and second hand is successful; if successful, go to step S123; if it fails, jump to step S121; When the number of hands is less than 3), or the crown cannot be recognized, it is judged that the recognition of the crown position, hour hand, minute hand, and second hand has failed;
- the angles of the clockwise direction are 90°, 120° and 270° in turn;
- Step S124 Calculate the picture time for the dial picture according to the clockwise angle of the hour hand, minute hand, and second hand relative to the 12H (ie, 12 o'clock) position.
- Step S13 Calculate the difference between the picture time corresponding to the same dial picture and the system time, so that n differences are obtained; here, respectively correspond to the first dial picture, the second dial picture, ... ⁇
- the difference of the 8th dial picture is recorded as GAP 1 , GAP 2 , ⁇ , GAP 8 respectively.
- the process of calculating the difference between the picture time corresponding to the same dial picture and the system time includes the following steps:
- Step S131 converting the picture time and system time corresponding to the same dial picture into a time value in seconds
- Step S132 making a difference between the two obtained time values to obtain a corresponding difference value.
- the time value obtained by converting the system time is 18610 seconds, and converting the picture time
- the obtained time value is 18599 seconds
- Step S14 judging whether the number m of difference values with the same value among the n difference values satisfies m/n ⁇ k; in this embodiment, the value of k is 0.7;
- Step S15 if yes, record the difference between the picture time and the system time corresponding to the dial picture obtained by taking the first photo in step S11 as the test result; if not, jump to step S11;
- n 8
- GAP 1 can be used as the test result of this difference test. If m ⁇ 5.6 (that is, in the calculated differences GAP 1 , GAP 2 , ⁇ , GAP 8 , only at most 5 differences are the same), it means that this difference test is unreliable , you need to jump to step S11 to start again.
- the step S2 is to calculate whether the difference ⁇ T between the test results of the two difference tests is smaller than a preset threshold; if so, judge that the travel time accuracy of the watch to be tested is qualified; if not, judge that the watch to be tested travels. Accuracy is not acceptable.
- the test result obtained by the first difference test is recorded as GAP x
- the test result obtained by the second difference test is recorded as GAP x
- x may also be set to 16 hours, or 8 hours, or the like.
- the value of n may also be n>8, such as 9, 10, 11, and so on.
- the value of k may also be 0.75, 0.8, 0.85, 0.9, 0.95 and so on.
- the value of y may also be 2, 3, 4, 5, and so on.
- the process of performing time identification on the dial picture may further include the following steps: Step S125, correcting the picture time that does not conform to the order of the picture time according to the time relationship between the system time and the picture time. Specifically, since the n dial pictures obtained in the step S11 are in a sequential order, the system time corresponding to the dial pictures obtained later is also larger. Take two dial pictures as an example, if the system time is large, the corresponding picture time should also be larger, and if the system time is small, the corresponding picture time should also be smaller.
- the system time corresponding to the a+1th dial picture is greater than the system time corresponding to the ath dial picture, and the picture time corresponding to the a+1th dial picture is smaller than the picture time corresponding to the ath dial picture, It means that the time calculation of the picture corresponding to the a+1th dial picture or the ath dial picture is incorrect, and it is necessary to re-recognize the time of the a+1th dial picture and the ath dial picture.
- step S14 the validity of the obtained data is judged (ie, step S14) to ensure that each difference
- the test results obtained by the value test are valid and reliable.
- the calculated picture time is corrected through the contextual relationship between multiple sets of data, which increases the validity of the data.
- the difference test of one stage is completed, and after the preset period x has passed, the difference test of the next stage is carried out. In this way, by judging whether the difference ⁇ T of the test results of the two difference tests is less than the preset threshold, It can accurately test the travel time accuracy of watch products.
- the visual testing system includes a camera module 1 , a tray 3 , a processing module 6 , an upper light-emitting module 2 and a lower light-emitting module 5 .
- the camera module 1 , the upper light-emitting module 2 , the tray 3 , and the lower light-emitting module 5 are installed on the bracket 7 from top to bottom.
- the tray 3 is made of light-transmitting material (eg, glass) for placing the watch 8 .
- the camera module 1 is arranged just above the tray 3 , so that the camera module can take a picture of the dial of the watch to be tested placed on the tray 3 .
- the camera module 1 and the processing module 6 are in signal connection.
- the upper light-emitting module 2 is arranged between the camera module 1 and the tray 3; the lower light-emitting module 5 is arranged below the tray 3; the upper light-emitting module 2 and the lower light-emitting module 5 are both arranged. Used to irradiate light toward the watch 8 on the tray 3 .
- the middle of the upper light-emitting module 2 has a through hole, and the camera module 1 is aligned with the through hole of the upper light-emitting module 2 .
- the upper light-emitting module 2 includes a frame and LED lights arranged on the frame, the frame is connected to the bracket 7 , and the through hole is provided in the middle of the frame.
- the camera module 1 is a high-definition camera.
- the camera module 1 can also be selected as a smart device with functions of taking pictures and signal transmission, for example, a smart phone, a tablet computer, and the like.
- the processing module 6 is a computer, and the processing module is used to control the visual testing system to implement the visual testing method described in the first embodiment.
- the processing module is used to control the visual testing system to implement the visual testing method described in the first embodiment.
- Embodiment 1 please refer to Embodiment 1, which will not be repeated here.
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Abstract
一种判断手表走时精度是否合格的视觉测试方法及系统。所述视觉测试方法包括如下步骤：步骤S1，对待测手表进行差值测试，在设定周期x后，再次对所述待测手表进行差值测试；步骤S2，计算两次差值测试的测试结果的差值△T是否小于预设阈值；若是，则判断所述待测手表走时精度合格；若否，则判断所述待测手表走精度不合格。采用所述的视觉测试方法时，通过判断两次差值测试的测试结果的差值△T是否小于预设阈值，即可以对手表产品的走时精度进行精确检验。
Description
发明涉及手表制造技术领域，具体涉及一种判断手表走时精度是否合格的视觉测试方法及系统。
复合手表集成了传统的机械表和新兴的智能手表的优点，即将智能模组植入机械表中，对手表对应的手机应用App通过蓝牙下发时间信息给智能模组，智能模组通过马达控制转子转动以调节时针和分针，实现机械手表智能化。
由于复合手表要将机械手表和智能模组结合，对机芯、组装等方面要求很高，组装完成后经常出现表针走时不准确，偏差较大的情况，为防止这种不合格产品流入市场，影响用户体验，需要对手表走时精度进行检测。
为此，有必要设计一种判断手表走时精度是否合格的视觉测试方法，以对手表产品的走时精度进行精确检验。
本发明所要解决的技术问题是提供一种判断手表走时精度是否合格的视觉测试方法，以对手表产品的走时精度进行精确检验。
本发明所要解决的另一个技术问题是提供一种判断手表走时精度是否合格的视觉测试系统，所述视觉测试系统可以用来实施上述的视觉测试方法。
为解决上述技术问题，发明所采用的技术方案是提供一种判断手表走时精度是否合格的视觉测试方法，所述视觉测试方法包括如下步骤：
步骤S1，对待测手表进行差值测试，在设定周期x后，再次对所述待测手表进行差值测试；其中，所述差值测试包括如下步骤：
步骤S11，对待测手表的表盘进行拍照，同步保存拍照所得到的表盘图片和拍照时的系统时间，如此重复n次，以得到n张表盘图片和n个分别与n张表盘图片一一对应的系统时间，n为大于等于1的自然数；
步骤S12，分别对n张表盘图片进行时间识别，以得到n个分别与n张表盘图片一一对应的图片时间；
步骤S13，分别计算对应同一张表盘图片的图片时间与系统时间的差值，如此，得到n个差值；
步骤S14，判断n个差值中数值相同的差值的数量m是否满足m/n≥k；
步骤S15，若是，则将对应所述步骤S11中第一次拍照所得到的表盘图片的图片时间与系统时间的差值记为测试结果；若否，则跳转至步骤S11；
步骤S2，计算两次差值测试的测试结果的差值△T是否小于预设阈值；若是，则判断所述待测手表走时精度合格；若否，则判断所述待测手表走精度不合格。
通过采用上述技术方案中的视觉测试方法，通过判断两次差值测试的测试结果的差值△T是否小于预设阈值，可以对手表产品的走时精度进行精确检验。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，在所述步骤S12中，对表盘图片进行时间识别的过程包括如下步骤：
步骤S121，识别表盘图片中的柄头位、时针、分针、秒针；
步骤S123，依据柄头位及预设柄头所处时位计算时针、分针、秒针相对12H位的顺时针方向角度；
步骤S124，根据时针、分针、秒针相对12H位的顺时针方向角度计算得出对于所述表盘图片的图片时间。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，其特征在于，在所述步骤S12中，对表盘图片进行时间识别的过程还包括如下步骤：
步骤S122，判断对柄头位、时针、分针、秒针的识别是否成功；若成功，则进入步骤S123；若失败，则跳转至步骤S121。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，在所述步骤S12中，对表盘图片进行时间识别的过程还包括如下步骤：
步骤S125，依据系统时间和图片时间的前后时间关系校正不符合前后顺序的图片时间。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，在所述步骤S13中，计算对应同一张表盘图片的图片时间与系统时间的差值的过程包括如下步骤：
步骤S131，将对应同一张表盘图片的图片时间和系统时间均转换成以秒为单位的时间值；
步骤S132，将所得到的两个时间值做差得到对应的差值。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，n≥8。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，k的值为0.7。
本发明提供的判断手表走时精度是否合格的视觉测试方法中，在所述步骤S11中，对待测手表的表盘进行拍照，同步保存拍照所得到的表盘图片和拍照时的系统时间，如此，每隔1秒重复1次，共重复n次。
为解决上述的另一个技术问题，发明所采用的技术方案提供是一种判断手表走时精度是否合格的视觉测试系统，所述视觉测试系统包括：
用于放置待测手表的由透光材料制成的托盘；
布置在托盘正上方的摄像模块；
与所述摄像模块信号连接的处理模块；
所述处理模块用于控制所述视觉测试系统实施如上所述的视觉测试方法。
本发明提供的手表时间的视觉识别系统中，所述视觉识别系统还包括上发光模块和下发光模块；所述上发光模块布置在所述摄像模块与所述托盘之间；所述下发光模块布置在所述托盘的下方；所述上发光模块和所述下发光模块均用于朝向所述托盘上的待测手表照射光线。
实施发明可以达到以下有益效果：
1、在所述差值测试的过程中，通过对待测手表进行多次拍照，以获得多组数据，并对所得到的的数据的有效性进行判断（即步骤S14），以确保每次差值测试所得到的测试结果是有效可靠的。
2、对表盘图片进行时间识别的过程，通过多组数据间的前后关联关系对所计算出的图片时间进行校正，增加了数据的有效性。
3、计算对应同一张表盘图片的图片时间与系统时间的差值的过程，将图片时间和系统时间的时、分、秒的值全部转换为秒后再计算两者的差值，有效避免时、分、秒分开计算造成的进位误差。
4、一个阶段差值测试完成，并经过预设周期x后，再进行下一阶段的差值测试，如此，通过判断两次差值测试的测试结果的差值△T是否小于预设阈值，可以对手表产品的走时精度进行精确检验。
为了更清楚地说明发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图：
图1为本发明实施例一提供的视觉测试方法的步骤流程图；
图2为本发明实施例一提供的视觉测试方法中差值测试的步骤流程图；
图3为本发明实施例一提供的视觉测试方法中对表盘图片进行时间识别的过程的步骤流程图；
图4为本发明实施例一提供的视觉测试方法中计算对应同一张表盘图片的图片时间与系统时间的差值的过程的步骤流程图；
图5为本发明实施例二提供的视觉测试方法的结构示意图。
具体实施方式中的附图标号说明：
摄像模块 1
上发光模块 2
托盘 3
下发光模块 5
处理模块 6
支架 7
手表 8 。
为了便于理解发明，下面将参照相关附图对发明进行更全面的描述。附图中给出了发明的典型实施例。但是，发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对发明的公开内容更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于发明的技术领域的技术人员通常理解的含义相同。本文中在发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制发明。
本说明书中使用的“第一”、“第二”等包含序数的术语可用于说明各种构成要素，但是这些构成要素不受这些术语的限定。使用这些术语的目的仅在于将一个构成要素区别于其他构成要素。例如，在不脱离发明的权利范围的前提下，第一构成要素可被命名为第二构成要素，类似地，第二构成要素也可以被命名为第一构成要素。
实施例一
本实施例提供了一种判断手表走时精度是否合格的视觉测试方法。参见图1，所述视觉测试方法包括如下步骤S1和步骤S2。
所述步骤S1为，对待测手表进行差值测试，在设定周期x后，再次对所述待测手表进行差值测试；本实施例中，x设定为24小时；
本实施例中，参见图2，所述差值测试包括如下步骤：
步骤S11，对待测手表的表盘进行拍照，同步保存拍照所得到的表盘图片和拍照时的系统时间，如此，每隔y秒重复1次，共重复n次，以得到n张表盘图片和n个分别与n张表盘图片一一对应的系统时间，n为大于等于1的自然数；在本实施例中，y的取值为1，n的取值为8。在这里，有关于系统时间，举例解释如下，当我们在5时10分10秒对待测手表的表盘进行第一次拍照以获得第一张表盘图片时，那么与第一张表盘图片对应的系统时间即为5时10分10秒；
步骤S12，分别对n张表盘图片进行时间识别，以得到n个分别与n张表盘图片一一对应的图片时间；
在所述步骤S12中，参见图3，对表盘图片进行时间识别的过程包括如下步骤：
步骤S121，识别表盘图片中的柄头位、时针、分针、秒针；
步骤S122，判断对柄头位、时针、分针、秒针的识别是否成功；若成功，则进入步骤S123；若失败，则跳转至步骤S121；具体的，如果出现表针识别不全（即识别出的表针的数量小于3），或是未能识别到柄头时，则判断对柄头位、时针、分针、秒针的识别失败；
步骤S123，依据柄头位及预设柄头所处时位计算时针、分针、秒针相对12H位的顺时针方向角度；在这里，柄头所处时位为预先设定的，柄头位相对12时顺时针方向角度=柄头所处时位的数值×30°，如常见的，当柄头所处时位分别为3时、4时、9时位时，柄头位相对12时顺时针方向角度则依次为90°、120°和270°；
步骤S124，根据时针、分针、秒针相对12H（即12时）位的顺时针方向角度计算得出对于所述表盘图片的图片时间。
步骤S13，分别计算对应同一张表盘图片的图片时间与系统时间的差值，如此，得到n个差值；在这里，分别对应第一张表盘图片、第二张表盘图片、······、第8张表盘图片的差值分别记为GAP
1、GAP
2、······、GAP
8。
在所述步骤S13中，参见图4，计算对应同一张表盘图片的图片时间与系统时间的差值的过程包括如下步骤：
步骤S131，将对应同一张表盘图片的图片时间和系统时间均转换成以秒为单位的时间值；
步骤S132，将所得到的两个时间值做差得到对应的差值。
举例而言，当对应第一张表盘图片的系统时间为5时10分10秒时、图片时间为5时9分59秒时，将系统时间换算得到的时间值为18610秒，将图片时间换算得到的时间值为18599秒，那么对应第一张表盘图片的差值GAP
1=11秒。
步骤S14，判断n个差值中数值相同的差值的数量m是否满足m/n≥k；在本实施例中，k的取值为0.7；
步骤S15，若是，则将对应所述步骤S11中第一次拍照所得到的表盘图片的图片时间与系统时间的差值记为测试结果；若否，则跳转至步骤S11；
在这里，n的取值为8，所以只要m≥5.6（即在计算所得到的差值GAP
1、GAP
2、······、GAP
8中，有6个以上的差值的数值相同），即可将GAP
1作为本次差值测试的测试结果。若m＜5.6（即在计算所得到的差值GAP
1、GAP
2、······、GAP
8中，仅有至多5差值的数值相同），则说明本次差值测试不可靠，需要跳转至步骤S11重新开始。
所述步骤S2为，计算两次差值测试的测试结果的差值△T是否小于预设阈值；若是，则判断所述待测手表走时精度合格；若否，则判断所述待测手表走精度不合格。在这里，将第一次差值测试所得到的测试结果记为GAP
x，将第二次差值测试所得到的测试结果记为GAP
x，那么，△T=GAP
x-GAP
0。
举例而言，若我们的预设阈值取值为5，那么当△T=GAP
x-GAP
0＜5时，则可以判断待测手表走时精度合格，当△T=GAP
x-GAP
0≥5时，则可以判断待测手表走时精度不合格。
在一些其他的实施例中，x也可以设定为16小时、或8小时等。在一些其他的实施例中，n的取值还可以是n＞8，例如9、10、11等。
在一些其他的实施例中，k的取值还可以是0.75、0.8、0.85、0.9、0.95等。
在一些其他的实施例中，y的取值还可以是2、3、4、5等等。
进一步的，在所述步骤S12中，对表盘图片进行时间识别的过程还可以包括如下步骤：步骤S125，依据系统时间和图片时间的前后时间关系校正不符合前后顺序的图片时间。具体的，由于在所述步骤S11所得到的n张表盘图片是有时序顺序的，后获得的表盘图片对应的系统时间也就越大。拿两张表盘图片来说，系统时间大的则相应的图片时间也应该更大，系统时间小的则相应的图片时间也应该更小。因此，当发现对应第a+1张表盘图片的系统时间大于对应第a张表盘图片的系统时间，而对应第a+1张表盘图片的图片时间小于对应第a张表盘图片的图片时间时，则说明对应第a+1张表盘图片或第a张表盘图片的图片时间计算有误，需要对第a+1张表盘图片和第a张表盘图片重新进行进行时间识别。
综上所述，实施发明可以达到以下有益效果：
1、在所述差值测试的过程中，通过对待测手表进行多次拍照，以获得多组数据，并对所得到的的数据的有效性进行判断（即步骤S14），以确保每次差值测试所得到的测试结果是有效可靠的。
2、对表盘图片进行时间识别的过程，通过多组数据间的前后关联关系对所计算出的图片时间进行校正，增加了数据的有效性。
3、计算对应同一张表盘图片的图片时间与系统时间的差值的过程，将图片时间和系统时间的时、分、秒的值全部转换为秒后再计算两者的差值，有效避免时、分、秒分开计算造成的进位误差。
4、一个阶段差值测试完成，并经过预设周期x后，再进行下一阶段的差值测试，如此，通过判断两次差值测试的测试结果的差值△T是否小于预设阈值，可以对手表产品的走时精度进行精确检验。
实施例二
本实施例提供了一种判断手表走时精度是否合格的视觉测试系统。参见图5，所述视觉测试系统包括摄像模块1、托盘3、处理模块6、上发光模块2和下发光模块5。其中，所述括摄像模块1、上发光模块2、托盘3、下发光模块5由上而下的安装于支架7上。所述托盘3由透光材料（例如，玻璃）制成，用于放置手表8。所述摄像模块1布置在托盘3正上方，如此，所述摄像模块可以拍摄得到放置在所述托盘3上的待测手表的表盘图片。所述摄像模块1与所述处理模块6之间信号连接。所述上发光模块2布置在所述摄像模块1与所述托盘3之间；所述下发光模块5布置在所述托盘3的下方；所述上发光模块2和所述下发光模块5均用于朝向所述托盘3上的手表8照射光线。
本实施例中，所述上发光模块2的中部具有通孔，所述摄像模块1对准所述上发光模块2的通孔。具体的，所述上发光模块2包括框架和设置在所述框架上的led灯，所述框架与所述支架7连接，所述框架的中部设有所述通孔。
本实施例中，所述摄像模块1为高清摄像头。
在一些其他的实施例中，所述摄像模块1也可以选用具有拍照和信号传输功能的智能设备，例如，智能手机、平板电脑等。
本实施例中，所述处理模块6为计算机，所述处理模块用于控制所述视觉测试系统实施如实施例一所述的视觉测试方法。具体的，可请参见实施例一，这里不再赘述。
上面结合附图对发明的实施例进行了描述，但是发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在发明的启示下，在不脱离发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于发明的保护之内。
Claims (10)
- 一种判断手表走时精度是否合格的视觉测试方法，其特征在于，所述视觉测试方法包括如下步骤：步骤S1，对待测手表进行差值测试，在设定周期x后，再次对所述待测手表进行差值测试；其中，所述差值测试包括如下步骤：步骤S11，对待测手表的表盘进行拍照，同步保存拍照所得到的表盘图片和拍照时的系统时间，如此重复n次，以得到n张表盘图片和n个分别与n张表盘图片一一对应的系统时间，n为大于等于1的自然数；步骤S12，分别对n张表盘图片进行时间识别，以得到n个分别与n张表盘图片一一对应的图片时间；步骤S13，分别计算对应同一张表盘图片的图片时间与系统时间的差值，如此，得到n个差值；步骤S14，判断n个差值中数值相同的差值的数量m是否满足m/n≥k；步骤S15，若是，则将对应所述步骤S11中第一次拍照所得到的表盘图片的图片时间与系统时间的差值记为测试结果；若否，则跳转至步骤S11；步骤S2，计算两次差值测试的测试结果的差值△T是否小于预设阈值；若是，则判断所述待测手表走时精度合格；若否，则判断所述待测手表走精度不合格。
- 根据权利要求1所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，在所述步骤S12中，对表盘图片进行时间识别的过程包括如下步骤：步骤S121，识别表盘图片中的柄头位、时针、分针、秒针；步骤S123，依据柄头位及预设柄头所处时位计算时针、分针、秒针相对12H位的顺时针方向角度；步骤S124，根据时针、分针、秒针相对12H位的顺时针方向角度计算得出对于所述表盘图片的图片时间。
- 根据权利要求2所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，在所述步骤S12中，对表盘图片进行时间识别的过程还包括如下步骤：步骤S122，判断对柄头位、时针、分针、秒针的识别是否成功；若成功，则进入步骤S123；若失败，则跳转至步骤S121。
- 根据权利要求2所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，在所述步骤S12中，对表盘图片进行时间识别的过程还包括如下步骤：步骤S125，依据系统时间和图片时间的前后时间关系校正不符合前后顺序的图片时间。
- 根据权利要求1所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，在所述步骤S13中，计算对应同一张表盘图片的图片时间与系统时间的差值的过程包括如下步骤：步骤S131，将对应同一张表盘图片的图片时间和系统时间均转换成以秒为单位的时间值；步骤S132，将所得到的两个时间值做差得到对应的差值。
- 根据权利要求1所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，n≥8。
- 根据权利要求1所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，k的值为0.7。
- 根据权利要求1所述的判断手表走时精度是否合格的视觉测试方法，其特征在于，在所述步骤S11中，对待测手表的表盘进行拍照，同步保存拍照所得到的表盘图片和拍照时的系统时间，如此，每隔1秒重复1次，共重复n次。
- 一种判断手表走时精度是否合格的视觉测试系统，其特征在于，所述视觉测试系统包括：用于放置待测手表的由透光材料制成的托盘；布置在托盘正上方的摄像模块；与所述摄像模块信号连接的处理模块；所述处理模块用于控制所述视觉测试系统实施如权利要求1-8中任意一项所述的视觉测试方法。
- 根据权利要求9所述的手表时间的视觉识别系统，其特征在于，所述视觉识别系统还包括上发光模块和下发光模块；所述上发光模块布置在所述摄像模块与所述托盘之间；所述下发光模块布置在所述托盘的下方；所述上发光模块和所述下发光模块均用于朝向所述托盘上的待测手表照射光线。
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| CN102840948A (zh) * | 2012-09-28 | 2012-12-26 | 长庆石油勘探局技术监测中心 | 智能型指针式压力表批量校验装置及批量校验方法 |
| CN104503221A (zh) * | 2014-11-18 | 2015-04-08 | 深圳市金立通信设备有限公司 | 一种钟表校准方法 |
| CN106990711A (zh) * | 2017-05-18 | 2017-07-28 | 广东乐源数字技术有限公司 | 一种通过图像识别进行手表对时的方法 |
| CN109062026A (zh) * | 2018-10-26 | 2018-12-21 | 珠海罗西尼表业有限公司 | 时间精度测量仪及其测量方法 |
| CN110929710A (zh) * | 2019-10-29 | 2020-03-27 | 湖南大学 | 一种基于视觉的仪表指针读数自动识别方法与系统 |
| CN112052745A (zh) * | 2020-08-13 | 2020-12-08 | 飞亚达精密科技股份有限公司 | 一种判断手表走时精度是否合格的视觉测试方法及系统 |
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| CN116991053A (zh) * | 2023-09-28 | 2023-11-03 | 天王电子（深圳）有限公司 | 一种计时产品走时质量智能检测设备及方法 |
| CN116991053B (zh) * | 2023-09-28 | 2024-01-02 | 天王电子（深圳）有限公司 | 一种计时产品走时质量智能检测设备及方法 |
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| CN112052745A (zh) | 2020-12-08 |
| CN112052745B (zh) | 2021-11-26 |
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