CN115633934A - Self-service large-scale vision detection system and method - Google Patents
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及视力检测技术领域，尤其涉及一种自助式大规模视力检测系统和方法。The invention relates to the technical field of vision detection, in particular to a self-service large-scale vision detection system and method.
背景技术Background technique
教育部、国家卫生健康委员会等部门明确要求学校每学期至少开展两次儿童和青少年的视力筛查和监测。而传统的视力检测，采用视光师人工指向视力灯箱的视标，被检测人指认视标方向的方式，来检测视力。在做大规模视力检测时，传统方法耗费大量时间、人力，效率低；容易出现被检测人员盲猜和背答案的情况；检测高度近视时，需要拉近视力屏和被检测人之间的距离，通过换算得出视力值，增加工作难度。虽然现在也有很多视力检测仪器，但仅是传统视力灯箱的电子化替代品，仍然需要人工指引或单台自动检测，并不适合大规模自助化视力检测，同时缺少数据自动收集，数据判读，异常情况判定，告警推送，实时复筛提醒和多机并发等功能。The Ministry of Education, the National Health Commission and other departments clearly require schools to carry out vision screening and monitoring of children and adolescents at least twice a semester. In the traditional vision test, the optometrist manually points to the visual target of the vision light box, and the tested person identifies the direction of the visual target to test the visual acuity. When doing large-scale vision testing, the traditional method consumes a lot of time, manpower, and low efficiency; it is easy for the tested person to guess blindly and memorize the answer; when detecting high myopia, it is necessary to shorten the distance between the vision screen and the tested person , through the conversion to obtain the visual acuity value, increasing the difficulty of work. Although there are many vision testing instruments now, they are only electronic substitutes for traditional vision light boxes. Manual guidance or single automatic detection is still required, which is not suitable for large-scale self-service vision testing. At the same time, it lacks automatic data collection, data interpretation, and abnormalities. Situation judgment, alarm push, real-time re-screening reminder and multi-machine concurrent functions.
因此设计一种适合大规模视力检测，减少工作人员，提高检测准确性和效率，实现实时数据采集和判读，对异常情况进行判定告警，实时复筛的自助式大规模视力检测系统和方法实属必要。Therefore, designing a self-service large-scale vision detection system and method suitable for large-scale vision detection, reducing staff, improving detection accuracy and efficiency, realizing real-time data collection and interpretation, judging and warning abnormal situations, and real-time re-screening necessary.
发明内容Contents of the invention
为解决上述技术问题，本发明采用如下技术方案：一种自助式大规模视力检测系统，包括云数据处理系统、管理终端、自助视力检测仪和数据采集终端，其中，In order to solve the above technical problems, the present invention adopts the following technical solution: a self-service large-scale vision detection system, including a cloud data processing system, a management terminal, a self-service vision tester and a data collection terminal, wherein,
云数据处理系统，作为自助式大规模视力检测系统的数据存储和处理中心，收集管理终端和数据采集终端的数据，对数据进行存档和判读，并进行告警推送；The cloud data processing system, as the data storage and processing center of the self-service large-scale vision detection system, collects the data of the management terminal and the data collection terminal, archives and interprets the data, and pushes the alarm;
管理终端，管理终端与云数据处理系统和若干自助视力检测仪相连接，视力检测现场工作人员通过管理终端对自助视力检测仪进行管理，并采集其数据发送至云数据处理系统；Management terminal, the management terminal is connected with the cloud data processing system and several self-service vision testers, and the on-site vision test staff manage the self-service vision testers through the management terminal, and collect their data and send them to the cloud data processing system;
自助视力检测仪，被检测人过自助视力检测仪检测视力，检测结果将发送至管理终端；Self-service vision tester, the tested person passes the self-service vision tester to test eyesight, and the test result will be sent to the management terminal;
数据采集终端，用于采集其它视力检测结果和数据。The data collection terminal is used to collect other vision test results and data.
优选地，管理终端通过无线与若干自助视力检测仪相连接，并同时控制和管理若干自助视力检测仪，一位工作人员可控制管理多台自助视力检测仪。Preferably, the management terminal is wirelessly connected to several self-service vision detectors, and simultaneously controls and manages several self-service vision detectors, and one staff member can control and manage multiple self-service vision detectors.
优选地，数据采集终端采集屈光度检测结果和眼健康数据，可通过网络连接屈光度检测仪或导入相关已采集数据，并发送至云数据处理系统。Preferably, the data collection terminal collects the diopter detection results and eye health data, can connect to the diopter detector through the network or import relevant collected data, and send them to the cloud data processing system.
优选地，自助视力检测仪包括视力检测终端、智能显示屏和遥控检测器，智能显示屏和遥控检测器与视力检测终端通过无线相连接，智能显示屏显示检测视标，被检测人通过遥控检测器选择其判断的视标方向，视力检测终端控制智能显示屏的视标显示和接受遥控检测器的方向信息。Preferably, the self-service vision testing instrument includes a vision testing terminal, an intelligent display screen and a remote control detector, the intelligent display screen and the remote control detector are wirelessly connected to the vision testing terminal, the intelligent display screen displays the detection visual mark, and the person to be tested detects the vision through the remote control The vision detector selects the visual mark direction judged by it, and the vision detection terminal controls the visual mark display of the intelligent display screen and receives the direction information of the remote control detector.
一种自助式大规模视力检测方法，其特征在于：包括如下步骤：A self-service large-scale vision detection method is characterized in that: comprising the steps of:
步骤1)工作人员在管理终端录入大规模检测的被检测人信息和场地信息等，并进行设置和现场布置；Step 1) The staff enters the information of the inspected person and site information of the large-scale inspection in the management terminal, and performs settings and on-site layout;
步骤2)被检查人在自助视力检测仪上自行完成视力检测；Step 2) The inspected person completes the vision test on the self-service vision tester;
步骤3)视力检测数据被实时发送至云数据处理系统；Step 3) the vision detection data is sent to the cloud data processing system in real time;
步骤4)云数据处理系统将收到数据与系统中历史数据或其它视力检测数据进行数据判读，当数据出现异常时，向管理终端推送告警；Step 4) The cloud data processing system will receive data and historical data in the system or other visual inspection data for data interpretation, and when the data is abnormal, push an alarm to the management terminal;
步骤5)工作人员接到管理终端的告警后，将对有异常的被检测人进行现场复检或进一步检查。Step 5) After receiving the alarm from the management terminal, the staff will conduct on-site re-examination or further inspection on the detected person with abnormalities.
优选地，步骤4进一步包括如下步骤：Preferably, step 4 further includes the following steps:
步骤41)云数据处理系统对收到视力检测结果进行校验，当检测结果不合格，将向管理终端推送告警；Step 41) The cloud data processing system checks the vision test result received, and when the test result is unqualified, an alarm will be pushed to the management terminal;
步骤42)云数据处理系统对比本次视力检测结果与之前历史视力检测结果，当结果出现较大差异时，将向管理终端推送告警；Step 42) The cloud data processing system compares the results of this vision test with the previous historical vision test results, and when there is a large difference in the results, an alarm will be pushed to the management terminal;
步骤43)云数据处理系统将本次视力检测结果与其它视力检测结果进行比对，对视力与屈光度数据进行质控判定，当两项或多项判定值矛盾时，则质控判定为异常值，将向管理终端推送告警；Step 43) The cloud data processing system compares the results of this visual acuity test with other visual acuity test results, and performs quality control judgment on the visual acuity and diopter data. When two or more judgment values are contradictory, the quality control judgment is an abnormal value , will push an alarm to the management terminal;
步骤44)云数据处理系统根据被检测人身份信息进行归类存档。Step 44) The cloud data processing system classifies and archives according to the identity information of the detected person.
优选地，步骤2进一步包括如下步骤：Preferably, step 2 further includes the following steps:
步骤21)每位被检测人在开始检测前，在自助视力检测仪上进行身份识别；Step 21) Each person to be tested carries out identification on the self-service vision tester before starting the test;
步骤22)被检测人根据视力检测终端提示，通过观测智能显示屏上视标，并用遥控检测器选择视标方向，通过对视标的多次判断，得出视力检测结果；Step 22) The detected person is prompted by the vision testing terminal, observes the visual mark on the smart display screen, and selects the direction of the visual mark with the remote control detector, and obtains the vision test result through multiple judgments on the visual mark;
步骤23)当被检测人在标准距离，无法看清和判定智能显示屏上4.0标准视标时，视力检测终端将控制智能显示屏逐级展示视力表4.0以下的视标；Step 23) When the detected person is at a standard distance and unable to see and judge the 4.0 standard optotype on the smart display screen, the vision detection terminal will control the smart display screen to display the visual targets below 4.0 on the eye chart step by step;
步骤24)当被检测人完成对4.0以下视标检测确认后，视力检测终端得出视力检测结果。Step 24) After the detected person completes the detection and confirmation of the visual mark below 4.0, the vision detection terminal obtains the vision detection result.
优选地，步骤1进一步包括如下步骤：Preferably, step 1 further includes the following steps:
步骤11)工作人员在管理终端录入大规模检测的被检测人信息，并为每位被检测人提供身份识别标识；Step 11) The staff enters the information of the detected persons in the large-scale detection at the management terminal, and provides an identification mark for each detected person;
步骤12)根据检测规模安排若干套自助视力检测仪，按要求放置视力检测终端、智能显示屏和遥控检测器；Step 12) Arrange several sets of self-service vision testing instruments according to the detection scale, and place vision testing terminals, smart display screens and remote control detectors as required;
步骤13)当检测场地有限，被检测人与智能显示屏之间距离无法达到标准距离时，在视力检测终端设置合适距离，智能显示屏将调整视标大小，现场根据设置距离进行调整。Step 13) When the testing site is limited and the distance between the tested person and the smart display cannot reach the standard distance, set an appropriate distance on the vision testing terminal, and the smart display will adjust the size of the visual mark, and the scene will be adjusted according to the set distance.
本发明的有益效果在于：The beneficial effects of the present invention are:
1)本发明的自助式大规模视力检测系统和方法，工作人员可以通过管理终端同时控制和管理若干台自助视力检测仪，实现了数据自动收集，提供了工作效率和准确率；1) With the self-service large-scale visual acuity testing system and method of the present invention, the staff can simultaneously control and manage several self-service visual acuity testing instruments through the management terminal, which realizes automatic data collection and provides work efficiency and accuracy;
2)本发明的自助式大规模视力检测系统和方法，自助视力检测仪易于使用，被检测人可自行完成身份识别、视力检测，减少工作人员和工作量；2) In the self-service large-scale vision testing system and method of the present invention, the self-service vision testing instrument is easy to use, and the person to be tested can complete identification and vision testing by himself, reducing staff and workload;
3)本发明的自助式大规模视力检测系统和方法，云数据处理系统可将本次视力检测结果与之前历史视力和屈光度检测结果进行判定，当判定为异常值，将发出告警；3) In the self-service large-scale visual acuity testing system and method of the present invention, the cloud data processing system can judge the results of this visual acuity testing and previous historical visual acuity and diopter testing results, and will issue an alarm when it is determined to be an abnormal value;
4)本发明的自助式大规模视力检测系统和方法，工作人员在管理终端收到云数据管理系统发来告警，将对被检测人进行现场复查，可以便于及时发现检测中异常；4) In the self-service large-scale vision detection system and method of the present invention, the staff will receive an alarm from the cloud data management system at the management terminal, and will conduct on-site reexamination of the detected person, which can facilitate timely detection of abnormalities in the detection;
5)发明的自助式大规模视力检测系统和方法，智能显示屏可需要匹配和调整视标大小，以适应场地要求和弱视被检测人的需求。5) Invented self-service large-scale vision detection system and method, the smart display screen may need to match and adjust the size of the visual mark to meet the requirements of the venue and the needs of the amblyopia tested.
附图说明Description of drawings
图1是本发明一种自助式大规模视力检测系统示意图；Fig. 1 is a schematic diagram of a self-service large-scale visual inspection system of the present invention;
图2是本发明一种自助式大规模视力检测方法的步骤4示意图；Fig. 2 is a schematic diagram of step 4 of a self-service large-scale vision detection method of the present invention;
图3是本发明一种自助式大规模视力检测方法的步骤4判定标准示意图。Fig. 3 is a schematic diagram of the judgment standard in Step 4 of a self-service large-scale visual acuity testing method of the present invention.
图中，1为自助视力检测仪，11为视力检测终端，12为智能显示屏，13为遥控检测器，2为管理终端，3为云数据处理系统，4为数据采集终端。In the figure, 1 is a self-service vision tester, 11 is a vision test terminal, 12 is a smart display screen, 13 is a remote control detector, 2 is a management terminal, 3 is a cloud data processing system, and 4 is a data collection terminal.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
参照图1所示，本发明提供的一种自助式大规模视力检测系统，包括云数据处理系统3、管理终端2、自助视力检测仪1和数据采集终端4，其中，Referring to Fig. 1, a self-service large-scale vision detection system provided by the present invention includes a cloud data processing system 3, a management terminal 2, a self-service vision tester 1 and a data collection terminal 4, wherein,
云数据处理系统3作为自助式大规模视力检测系统的数据存储和处理中心，收集管理终端2和数据采集终端4的数据，对数据进行存档和判读，并进行告警推送；As the data storage and processing center of the self-service large-scale vision detection system, the cloud data processing system 3 collects the data of the management terminal 2 and the data collection terminal 4, archives and interprets the data, and pushes the alarm;
管理终端2由检测现场工作人员手持，对大规模视力检测现场设备进行配置，工作人员使用管理终端2，针对一次大规模视力检测工作，生成一个任务，通过导入或者录入被检测人的信息，包括姓名、身份证号码、父母信息、电话等，预生成用身份识别标识，通常为二维码；工作人员还要通过管理终端2选择检测项目，比如裸眼视力、矫正视力等，布置智能视力屏12和被检测人之间的检测距离，设置智能视力屏12的距离参数和起始度数等。管理终端2与若干自助视力检测仪1通过无线网络、移动网络相连接，工作人员通过管理终端2对自助视力检测仪1进行管理，监控被检测人的检测情况，并采集其数据通过无线网络、移动网络发送至云数据处理系统3，并接受其推送告警。The management terminal 2 is held by the staff at the testing site to configure the large-scale vision testing site equipment. The staff use the management terminal 2 to generate a task for a large-scale vision testing work, and import or enter the information of the tested person, including Name, ID card number, parental information, phone number, etc., are pre-generated with identification marks, usually QR codes; staff also need to select detection items through the management terminal 2, such as naked eye vision, corrected vision, etc., and arrange smart vision screens 12 and the detection distance between the detected person, the distance parameter and the initial degree etc. of the intelligent vision screen 12 are set. The management terminal 2 is connected to a number of self-service vision testing instruments 1 through wireless networks and mobile networks. The staff manages the self-service vision testing instruments 1 through the management terminal 2, monitors the detection situation of the tested person, and collects its data through the wireless network, The mobile network sends to the cloud data processing system 3, and accepts its push alarm.
自助视力检测仪1，被检测人过自助视力检测仪1检测视力，检测结果将发送至管理终端2。自助视力检测仪1包括视力检测终端11、智能显示屏12和遥控检测器13，智能显示屏12和遥控检测器13与视力检测终端11通过无线相连接。视力检测终端11具有被检测人身份识别功能，通过扫描每个被检测人的身份识别标识，通常为二维码，来识别确认被检测人，视力检测终端11还控制智能显示屏12的信息显示、视标显示，视标动态调整、视标指示、用户使用引导等，具有全程语音和文字引导来指引被检测人进行检测。智能视力屏12根据国家规范，显示视标的尺寸、亮度、对比度，并动态调整视标朝向。被检测人观察智能显示屏12上视标，通过遥控检测器13选择其判断的视标方向，视力检测终端11接受遥控检测器13的方向信息。The self-service vision tester 1 is used to test the eyesight of the detected person through the self-service vision tester 1, and the test result will be sent to the management terminal 2. The self-service vision testing instrument 1 includes a vision testing terminal 11, an intelligent display screen 12 and a remote control detector 13, and the intelligent display screen 12, the remote control detector 13 and the vision testing terminal 11 are connected wirelessly. The vision detection terminal 11 has the function of identifying the person to be detected. By scanning the identity identification mark of each person to be detected, usually a two-dimensional code, to identify and confirm the person to be detected, the vision detection terminal 11 also controls the information display of the smart display screen 12 , Visual mark display, dynamic adjustment of visual mark, visual mark indication, user guide, etc., with full voice and text guidance to guide the tested person to perform detection. The intelligent vision screen 12 displays the size, brightness and contrast of the visual target according to the national standard, and dynamically adjusts the orientation of the visual target. The detected person observes the visual mark on the smart display screen 12 , selects the direction of the visual mark judged by the remote control detector 13 , and the vision detection terminal 11 receives the direction information from the remote control detector 13 .
数据采集终端4采集屈光度检测结果和眼健康数据，可通过网络连接屈光度检测仪或导入相关已采集数据，眼健康数据包括戴镜情况、斜视、红光反射、眼外观等，并发送至云数据处理系统3，用做检测时做数据比对，以发现异常情况。The data collection terminal 4 collects the diopter detection results and eye health data, which can be connected to the diopter detector through the network or import relevant collected data. The eye health data include glasses wearing, strabismus, red light reflection, eye appearance, etc., and send them to the cloud data The processing system 3 is used for data comparison during detection to find abnormalities.
一种自助式大规模视力检测方法，包括如下步骤：A self-service large-scale vision detection method, comprising the steps of:
步骤1)工作人员在管理终端2录入大规模检测的被检测人信息和场地信息等，并进行设置和现场布置；Step 1) The staff enters the information of the person to be detected and the site information of the large-scale detection in the management terminal 2, and performs setting and on-site layout;
步骤2)被检查人在自助视力检测仪1上自行完成视力检测；Step 2) The inspected person completes the vision test on the self-service vision tester 1 by himself;
步骤3)视力检测数据被实时发送至云数据处理系统3；Step 3) vision detection data is sent to cloud data processing system 3 in real time;
步骤4)云数据处理系统3将收到数据与系统中历史数据或其它视力检测数据进行数据判读，当数据出现异常时，向管理终端2推送告警；Step 4) The cloud data processing system 3 will receive the data and the historical data in the system or other vision detection data to carry out data interpretation, and when the data is abnormal, push an alarm to the management terminal 2;
步骤5)工作人员接到管理终端2的告警后，将对有异常的被检测人进行现场复检或进一步检查。Step 5) After receiving the alarm from the management terminal 2, the staff will conduct on-site re-examination or further inspection on the detected persons with abnormalities.
参照图2所示，步骤4进一步包括如下步骤：Shown in Fig. 2 with reference to, step 4 further comprises the following steps:
步骤41)云数据处理系统3对收到视力检测结果进行校验，当检测结果不合格，例如：双眼视力结果不全、裸眼视力高于矫正视力，将向管理终2端推送告警；Step 41) The cloud data processing system 3 checks the received visual acuity test results, and when the test results are unqualified, for example: the visual acuity of both eyes is incomplete, and the uncorrected visual acuity is higher than the corrected visual acuity, an alarm will be sent to the management terminal 2;
步骤42)云数据处理系统3对比本次视力检测结果与之前历史视力检测结果，当结果出现较大差异时，例如：基于本次和上次检测时间间隔，本次视力检测结果比之前视力检测结果，视力下降超出正常范围20％，将向管理终端2推送告警；Step 42) The cloud data processing system 3 compares the results of this vision test with the previous historical vision test results. When there is a large difference in the results, for example: based on the time interval between this time and the last test, the result of this vision test is better than the previous vision test. As a result, if the vision loss exceeds 20% of the normal range, an alarm will be sent to the management terminal 2;
步骤43)云数据处理系统3将本次视力检测结果与其它视力检测结果进行比对，对视力与屈光度数据进行质控判定，云数据处理系统3将屈光度、视力等判读为“正常”、“轻度异常”、“异常”，当两项或多项判定值矛盾时，则质控判定为异常值，比如屈光为异常、视力为正常，或视力为异常、屈光度为正常，则质控判定为有问题，将向管理终端2推送告警；Step 43) The cloud data processing system 3 compares the results of this visual acuity test with other visual acuity test results, and performs quality control judgment on the visual acuity and diopter data. The cloud data processing system 3 interprets the diopter and visual acuity as "normal", " Mildly abnormal" and "abnormal", when two or more judgment values are contradictory, the quality control judges them as abnormal values, such as abnormal refraction and normal vision, or abnormal vision and normal diopter, then quality control If it is determined that there is a problem, an alarm will be sent to the management terminal 2;
步骤44)云数据处理系统3根据被检测人身份信息进行归类存档。Step 44) The cloud data processing system 3 classifies and archives according to the identity information of the detected person.
步骤2进一步包括如下步骤：Step 2 further includes the following steps:
步骤21)每位被检测人在开始检测前，在自助视力检测仪1上进行身份识别，在视力检测终端11上扫描预先准备的身份识别标志二维码，启动自助视力检测仪1进入该被检测人的视力检测；Step 21) Before starting the test, each person to be tested performs identity recognition on the self-service vision tester 1, scans the QR code of the identity identification mark prepared in advance on the vision test terminal 11, and starts the self-service vision tester 1 to enter the self-service vision tester 1. Detect human vision detection;
步骤22)被检测人根据视力检测终端11的语音和文字提示，通过观测智能显示屏12上视标，并用遥控检测器13选择视标“E”的方向，检测终端11根据被检测人对每一行视标指向的检测正确率，自动上下调整指向的视标，进行多轮检测，直至检测被检测人的准确视力；Step 22) The detected person, according to the voice and text prompts of the vision detection terminal 11, observes the visual mark on the smart display screen 12, and selects the direction of the visual mark "E" with the remote control detector 13, and the detection terminal 11 is based on the detected people's observation of each visual mark. The correct rate of detection of the direction of a line of sight mark, automatically adjust the pointing mark up and down, and perform multiple rounds of detection until the accurate vision of the person being tested is detected;
步骤23)当被检测人在标准距离，无法看清和判定智能显示屏12上4.0标准视标时，视力检测终端11将控制智能显示屏12逐级展示视力表4.0以下的视标；Step 23) When the detected person is at a standard distance and cannot clearly see and determine the 4.0 standard optotype on the smart display screen 12, the vision detection terminal 11 will control the smart display screen 12 to display the optotypes below 4.0 in the eye chart step by step;
步骤24)当被检测人完成对4.0以下视标检测确认后，视力检测终端11得出视力检测结果。Step 24) After the person to be tested completes the detection and confirmation of the visual mark below 4.0, the vision detection terminal 11 obtains the vision detection result.
步骤1进一步包括如下步骤：Step 1 further includes the following steps:
步骤11)工作人员使用管理终端2，针对一次大规模视力检测工作，生成一个任务，通过导入或者录入被检测人的信息，包括姓名、身份证号码、父母信息、电话等，预先为每一位被检测人生成用身份识别标识，通常为二维码；Step 11) The staff uses the management terminal 2 to generate a task for a large-scale visual inspection work, by importing or entering the information of the person to be tested, including name, ID number, parent information, phone number, etc. The person being detected uses an identification mark, usually a QR code;
步骤12)根据检测任务量(时间计划、用户数量)，合理配置一定数量的自助视力检测仪1，根据场地按要求放置视力检测终端11、智能显示屏12和遥控检测器13，确保被检测人在检测时不会相互干扰；Step 12) According to the amount of detection tasks (time plan, number of users), rationally configure a certain number of self-service vision testers 1, and place vision test terminals 11, smart display screens 12 and remote control detectors 13 according to the requirements of the site to ensure that the tested people will not interfere with each other during detection;
步骤13)当检测场地有限，被检测人与智能显示屏12之间距离无法达到标准5米时，在视力检测终端11设置合适距离，智能显示屏12将调整视标大小，现场根据设置距离进行调整。Step 13) When the detection site is limited and the distance between the detected person and the smart display screen 12 cannot reach the standard 5 meters, set a suitable distance on the vision detection terminal 11, and the smart display screen 12 will adjust the size of the visual mark, and the scene will be carried out according to the set distance. Adjustment.
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.
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