WO2019184057A1 - Student terminal and interactive classroom question answering system - Google Patents

Student terminal and interactive classroom question answering system Download PDF

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WO2019184057A1
WO2019184057A1 PCT/CN2018/086462 CN2018086462W WO2019184057A1 WO 2019184057 A1 WO2019184057 A1 WO 2019184057A1 CN 2018086462 W CN2018086462 W CN 2018086462W WO 2019184057 A1 WO2019184057 A1 WO 2019184057A1
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student terminal
student
terminal
data
data collector
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PCT/CN2018/086462
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French (fr)
Chinese (zh)
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刁尚华
高军
刁远东
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深圳市华士精成科技有限公司
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Priority to CN201810249534.6A priority Critical patent/CN108230796A/en
Priority to CN201810249534.6 priority
Application filed by 深圳市华士精成科技有限公司 filed Critical 深圳市华士精成科技有限公司
Publication of WO2019184057A1 publication Critical patent/WO2019184057A1/en

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B5/00Electrically-operated educational appliances
    • G09B5/08Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations
    • G09B5/14Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations with provision for individual teacher-student communication
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B7/00Electrically-operated teaching apparatus or devices working with questions and answers
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04883Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for entering handwritten data, e.g. gestures, text

Abstract

Disclosed are a student terminal and an interactive classroom question answering system. The interactive classroom question answering system comprises a teaching computer system, a data collector and a student terminal. The student terminal comprises a first micro-controller, a display screen, a keyboard, a wireless communication circuit and an electromagnetic induction touch screen, wherein the wireless communication circuit is a radio-frequency transceiving circuit; and the display screen, the keyboard, the radio-frequency transceiving circuit and the electromagnetic induction touch screen are respectively connected to the first micro-controller. A host of the teaching computer system is connected to the data collector. The student terminal is in wireless communication connection with the data collector by means of the radio-frequency transceiving circuit. The student terminal and the interactive classroom question answering system of the present invention are low in cost, low in power consumption and easy to popularize.

Description

一种学生终端和课堂互动答题系统Student terminal and classroom interactive answering system [技术领域][Technical field]
本发明涉及信息化教学,尤其涉及一种学生终端和课堂互动答题系统。The invention relates to information teaching, in particular to a student terminal and a classroom interactive answering system.
[背景技术][Background technique]
课堂互动反馈系统是信息化教育的重要环节,通过信息化的电子设备,将老师和学生连动起来,一方面提高课堂学生的参与度,另一方面帮助老师高效的掌握学生接受情况。反馈系统还能进行一些数据统计和分析,对教学参与各方形成有益的报告参考。反馈系统所使用的学生端设备有智能手机、平板电脑、智能学生卡等。The classroom interactive feedback system is an important part of information education. Through the electronic devices of informationization, the teachers and students are linked together to improve the participation of students in the classroom. On the other hand, the teachers can effectively grasp the acceptance of students. The feedback system can also perform some data statistics and analysis, and form a useful report reference for all parties involved in teaching. The student equipment used in the feedback system includes a smartphone, a tablet, a smart student card, and the like.
申请号为CN201510634538.2的发明公开了一种基于智能手机的教学辅助系统,该系统在教室内设有路由器、与路由器无线连接的学生手机、与路由器连接的电脑、与电脑连接的显示机构;该发明的优点在于该系统利用校园网络,将学生手机互联到多媒体教学系统中,方便课堂互动,既能避免学生玩手机,也能增加学生上课趣味性,积极参与到课堂教学中,从而有效地提高了教学质量。The invention with the application number CN201510634538.2 discloses a teaching assistant system based on a smart phone, which has a router in the classroom, a student mobile phone wirelessly connected with the router, a computer connected to the router, and a display mechanism connected to the computer; The invention has the advantages that the system utilizes the campus network to interconnect the student mobile phone into the multimedia teaching system, and facilitates classroom interaction, which can prevent the students from playing the mobile phone, increase the interest of the students in the class, and actively participate in the classroom teaching, thereby effectively Improve the quality of teaching.
申请号为CN201710798034.3的发明公开了一种课堂互动教学系统,包括教师终端、学生终端以及分别与教师终端和学生终端连接的服务器端;所述的教师终端包括教师注册登陆模块、课堂中心模块、课堂创建模块、上课模块、课堂签到模块、答题控制模块和下课模块;所述的学生终端包括学生注册登陆模块、学习中心模块、课堂搜索模块、学生签到模块、事件控制唤醒模块和答题与反馈模块;所述的服务器端包括消息通信服务器和数据库。该还公开了以一种课堂互动教学方法,最大化地降低了课堂互动的门槛和限制条件,师生仅 需移动终端设备和网络,例如,移动流量、校园网等,无需专门搭建设备所需环境即可为师生架起一座课堂互动的桥梁,用户使用便捷,成本低;同时系统使用简易,极具推广性。The invention with the application number CN201710798034.3 discloses a classroom interactive teaching system, including a teacher terminal, a student terminal, and a server end respectively connected with the teacher terminal and the student terminal; the teacher terminal includes a teacher registration login module and a classroom center module. , classroom creation module, class module, classroom attendance module, answer control module and class module; the student terminal includes student registration login module, learning center module, classroom search module, student sign-in module, event control wake-up module and answer and feedback Module; the server side includes a message communication server and a database. It also discloses a classroom interactive teaching method, which minimizes the threshold and restrictions of classroom interaction. Teachers and students only need mobile terminal equipment and networks, for example, mobile traffic, campus network, etc., without the need to build equipment. The environment can provide a classroom interaction bridge for teachers and students. The user is easy to use and low in cost. At the same time, the system is easy to use and highly popular.
专利号为CN201520554368.2的实用新型公开了一种基于RFID无线智能卡的教学反馈系统;包括RFID教师卡、RFID学生卡、RFID数据采集器、安装有课堂教学系统的教学计算机和电子白板,所述RFID数据采集器通过接口与所述教学计算机连接,所述电子白板与所述教学计算机通过数据线连接;所述RFID数据采集器用于接收所述RFID教师卡发出的数据信号并传输给所述教学计算机;所述RFID学生卡记录有学生的身份信息,所述RFID学生卡设有卡内控制器,且卡体上设有若干选择功能键,每一个所述选择功能键均与所述卡内控制器连接;所述RFID数据采集器用于接收所述RFID学生卡发出的数据信号并传输给所述教学计算机;所述教学计算机通过无线网络与云服务器连接。全新课堂互动模式,节省大量开支,以最低成本成就最优效果。Patent No. CN201520554368.2 discloses a teaching feedback system based on RFID wireless smart card; including RFID teacher card, RFID student card, RFID data collector, teaching computer and electronic whiteboard installed with classroom teaching system, The RFID data collector is connected to the teaching computer through an interface, and the electronic whiteboard is connected to the teaching computer through a data line; the RFID data collector is configured to receive a data signal sent by the RFID teacher card and transmit the data to the teaching a computer; the RFID student card records the identity information of the student, the RFID student card is provided with an in-card controller, and the card body is provided with a plurality of selection function keys, and each of the selection function keys is associated with the card The controller is connected; the RFID data collector is configured to receive a data signal sent by the RFID student card and transmit the data signal to the teaching computer; and the teaching computer is connected to the cloud server through a wireless network. The new classroom interaction model saves a lot of money and achieves the best results at the lowest cost.
申请号为CN201510634538.2的发明和申请号为CN201710798034.3的发明有一个共同的特点,在学生端使用了通用的移动通信设备,如智能手机或平板电脑。智能手机在中小学阶段是无法普及的,还因为手机会影响正常的教学秩序,因此在多数中小学被禁用。平板电脑的成本较高,也无法普及推广。并且,手机和平板电脑的网络接入方式是移动通信网络和WIFI,移动通信网络由于资费高,不能在中小学推广;如果在教室里接入WIFI,由于接入终端数量较多,班级人数可能超过50个,普通的家用路由器无法承载这么多的设备接入,专用的多点接入路由器价格昂贵,设备的成本会成为学校推广普及的障碍。另外,智能手机和平板电脑的电池续航时间较短,不利于大批量使用时的维护工作。The invention of the application number CN201510634538.2 and the invention of the application number CN201710798034.3 have a common feature, and a universal mobile communication device such as a smartphone or a tablet computer is used on the student side. Smartphones are not popular in primary and secondary schools, and because most mobile schools affect normal teaching order, they are disabled in most primary and secondary schools. Tablet PCs are costly and cannot be popularized. Moreover, the network access methods of mobile phones and tablet computers are mobile communication networks and WIFIs. Mobile communication networks cannot be promoted in primary and secondary schools because of high tariffs; if access to WIFIs in the classrooms, the number of classes may be large due to the large number of access terminals. More than 50, ordinary home routers can not carry so many devices to access, dedicated multi-point access routers are expensive, and the cost of equipment will become an obstacle to the popularization of schools. In addition, smartphones and tablets have shorter battery life, which is not conducive to maintenance during high-volume use.
专利号为CN201520554368.2的实用新型公开了一种基于RFID的学生卡,可以实现课堂互动的效果。该项技术解决了终端功耗放系统硬件成本高的问题,但是学生卡只能实现按键输入,用于选择题、判断题等客观题的互动,无法满足中小学课堂练习最多的、需要手写输入的题型。The utility model with the patent number CN201520554368.2 discloses an RFID-based student card, which can achieve the effect of classroom interaction. This technology solves the problem of high hardware cost of the terminal power consumption system, but the student card can only realize the key input, which is used for the interaction of objective questions such as multiple-choice questions and judgment questions, and can not meet the most practice in primary and secondary classrooms, and requires handwriting input. Question type.
[发明内容][Summary of the Invention]
本发明要解决的技术问题是提供一种低成本、低功耗、便于普及推广的学生终端。The technical problem to be solved by the present invention is to provide a student terminal that is low in cost, low in power consumption, and easy to popularize.
本发明另一个要解决的技术问题是提供一种低成本、低功耗、便于普及推广的课堂互动答题系统。Another technical problem to be solved by the present invention is to provide a classroom interactive answering system with low cost, low power consumption and convenient popularization.
为了解决上述技术问题,本发明采用的技术方案是,一种学生终端,包括第一微控制器、显示屏、键盘、无线通信电路和电磁感应触摸屏,所述的无线通信电路是射频收发电路,显示屏、键盘、射频收发电路和电磁感应触摸屏分别接第一微控制器。In order to solve the above technical problem, the technical solution adopted by the present invention is a student terminal, including a first microcontroller, a display screen, a keyboard, a wireless communication circuit, and an electromagnetic induction touch screen, wherein the wireless communication circuit is a radio frequency transceiver circuit. The display screen, the keyboard, the RF transceiver circuit and the electromagnetic induction touch screen are respectively connected to the first microcontroller.
以上所述的学生终端,所述的显示屏是电子墨水屏。In the student terminal described above, the display screen is an electronic ink screen.
一种课堂互动答题系统,包括教学计算机系统、数据采集器和上述的学生终端,教学计算机系统的主机与数据采集器连接,学生终端通过射频收发电路与数据采集器无线通信连接。A classroom interactive answering system includes a teaching computer system, a data collector and the above-mentioned student terminal. The host of the teaching computer system is connected with the data collector, and the student terminal is wirelessly connected with the data collector through the RF transceiver circuit.
以上所述的课堂互动答题系统,数据采集器包括第二微控制器、接口电路和复数个射频电路,射频电路和接口电路分别接第二微控制器,接口电路接教学计算机系统的主机;所述的复数个射频电路包括一个作为短数据包传输通道的射频电路和至少一个作为长数据包传输通道的射频电路,所述的射频电路与学生终端的射频收发电路无线通信连接。In the classroom interactive answering system described above, the data collector comprises a second microcontroller, an interface circuit and a plurality of RF circuits, the RF circuit and the interface circuit are respectively connected to the second microcontroller, and the interface circuit is connected to the host of the teaching computer system; The plurality of radio frequency circuits include a radio frequency circuit as a short data packet transmission channel and at least one radio frequency circuit as a long data packet transmission channel, and the radio frequency circuit is wirelessly connected to the radio frequency transceiver circuit of the student terminal.
以上所述的课堂互动答题系统,教学计算机系统包括所述的主机、投影屏 或电子白板,投影屏或电子白板与主机连接。In the classroom interactive answering system described above, the teaching computer system includes the host, the projection screen or the electronic whiteboard, and the projection screen or the electronic whiteboard is connected to the host.
以上所述的课堂互动答题系统,包括远程服务器,主机与远程服务器通过因特网连接,进行数据交互。The classroom interactive answering system described above includes a remote server, and the host and the remote server are connected through the Internet for data interaction.
以上所述的课堂互动答题系统,系统的工作过程包括以下步骤:In the classroom interactive answering system described above, the working process of the system includes the following steps:
701)主机下发答题开始通知到数据采集器,数据采集器进入答题状态;701) The host sends a reply to the data collector, and the data collector enters the answer state;
702)开机的学生终端周期性地发送查询信息,数据采集器收到查询信息,下发题目的简要信息;702) the student terminal that is turned on periodically sends the query information, and the data collector receives the query information and sends the brief information of the topic;
703)学生终端收到简要信息后,发送题目详细信息请求;数据采集器给学生终端分配一个长数据包通道号,指定通信的频率,并回复给学生终端;703) after receiving the brief information, the student terminal sends a request for detailed information of the topic; the data collector allocates a long packet channel number to the student terminal, specifies the frequency of communication, and replies to the student terminal;
704)学生终端切换到长数据包模式下对应的频率,以长数据包格式向数据采集器发送题目内容请求,数据采集器切换到长数据包传输通道以长数据包格式向学生终端发送题目内容;学生终端重复发送内容请求,直到全部题目内容接收完成;704) the student terminal switches to the corresponding frequency in the long data packet mode, and sends the topic content request to the data collector in a long data packet format, and the data collector switches to the long data packet transmission channel to send the topic content to the student terminal in a long data packet format. The student terminal repeatedly sends the content request until all the content of the topic is received;
705)学生终端收到题目内容后,在显示屏上显示;学生者通过键盘或电磁感应触摸屏输入答案,输入完成后提交;705) after receiving the content of the topic, the student terminal displays on the display screen; the student inputs the answer through the keyboard or the electromagnetic induction touch screen, and submits after the input is completed;
706)如果是客观题或者简单的数字题,学生终端直接通过短数据包格式提交,如果是需要书写的主观题,学生终端先通过短数据包向数据采集器发送长数据包通信请求,数据采集器给学生终端分配一个长数据包通道号,回复给学生终端;706) If it is an objective question or a simple number question, the student terminal submits directly through the short data packet format. If it is a subjective question that needs to be written, the student terminal first sends a long data packet communication request to the data collector through the short data packet, and the data is collected. The device assigns a long packet channel number to the student terminal and replies to the student terminal;
707)学生终端切换到长数据包模式,以长数据包格式向数据采集器发送答案内容,数据采集器予以接收;学生终端重复发送答案数据包,直到所有答案内容发送完毕。707) The student terminal switches to the long data packet mode, and sends the answer content to the data collector in a long data packet format, and the data collector receives the answer; the student terminal repeatedly sends the answer data packet until all the answer content is sent.
以上所述的课堂互动答题系统,学生终端第一次与数据采集器连接时,先进行注册,通过电磁感应触摸屏发注册请求,数据采集器对比白名单,如果该学生终端属于白名单中的学生终端,则给予注册应答,如果不属于白名单中的学生终端,则不予理会;简要信息包括答题模式、题型和题目数量。In the classroom interactive answering system described above, when the student terminal is connected to the data collector for the first time, the registration is first performed, and the registration request is sent through the electromagnetic induction touch screen, and the data collector compares the white list, if the student terminal belongs to the whitelisted student. The terminal gives a registration response, and if it is not a student terminal in the whitelist, it ignores it; the brief information includes the answer mode, the question type, and the number of questions.
以上所述的课堂互动答题系统,手写终端进行主观题书写作答的流程如下:The above-mentioned classroom interactive answering system, the flow of the handwritten terminal to write the subjective question book is as follows:
901)学生终端收到题目信息后,由第一微控制器开启电磁感应触摸屏电路的电源,电磁感应触摸屏和控制算法开始运行;901) after receiving the title information, the first microcontroller turns on the power of the electromagnetic induction touch screen circuit, and the electromagnetic induction touch screen and the control algorithm start to run;
902)学生使用电磁笔进行书写,第一微控制器将书写的笔迹数据以像素点的形式进行存储;902) the student writes using an electromagnetic pen, and the first microcontroller stores the written handwriting data in the form of pixels;
903)学生书写完毕,点击提交按键,第一微控制器关闭电磁感应触摸屏的电源,并停止运行手写输入控制算法;903) After the student finishes writing, click the submit button, the first microcontroller turns off the power of the electromagnetic induction touch screen, and stops running the handwriting input control algorithm;
904)第一微控制器将存储的笔迹数据进行压缩,然后向数据采集器请求上传;904) the first microcontroller compresses the stored handwriting data and then requests uploading to the data collector;
905)笔迹数据压缩采用二值图像压缩算法。905) Handwriting data compression uses a binary image compression algorithm.
以上所述的课堂互动答题系统,教学计算机主机上的客户端软件对题目显示部分进行截图,并将获取的图片进行压缩后下发给数据采集器。In the classroom interactive answering system described above, the client software on the teaching computer host takes a screenshot of the title display portion, and compresses the acquired image and sends it to the data collector.
本发明的学生终端和课堂互动答题系统成本低、功耗低、便于普及推广。The student terminal and the classroom interactive answering system of the invention have low cost, low power consumption and are convenient for popularization and promotion.
[附图说明][Description of the Drawings]
下面结合附图和具体实施方式对本发明作进一步详细的说明。The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
图1是本发明实施例课堂互动答题系统的原理框图。1 is a schematic block diagram of a classroom interactive answering system according to an embodiment of the present invention.
图2是本发明实施例手写终端(学生终端)的原理框图。2 is a schematic block diagram of a handwriting terminal (student terminal) according to an embodiment of the present invention.
图3是本发明实施例接收器(数据采集器)的原理框图。3 is a schematic block diagram of a receiver (data collector) in accordance with an embodiment of the present invention.
[具体实施方式][detailed description]
本发明实施例课堂互动答题系统的结构和原理如图1至图3所示。The structure and principle of the classroom interactive answering system of the embodiment of the present invention are shown in FIGS. 1 to 3.
本发明实施例是一种带有手写板的课堂互动答题系统,包括手写终端(学生终端)、接收器(数据采集器)、教学计算机和显示装置。其中,教学计算机承载课堂互动的客户端软件。The embodiment of the invention is a classroom interactive answering system with a tablet, including a handwriting terminal (student terminal), a receiver (data collector), a teaching computer and a display device. Among them, the teaching computer carries the interactive client software of the classroom.
手写终端包括手写输入单元、显示屏、键盘、微控制器、无线通信电路、存储器、电源管理电路和电池。The handwriting terminal includes a handwriting input unit, a display screen, a keyboard, a microcontroller, a wireless communication circuit, a memory, a power management circuit, and a battery.
手写输入单元提供笔迹输入采集功能,用于采集用户书写输入或点选输入。键盘提供开关机、回车、发送和清除等常用功能键。显示屏显示操作过程提示和结果提示,显示屏还能显示从接收器下发的信息,包括题目信息。The handwriting input unit provides a handwriting input acquisition function for collecting user writing input or clicking input. The keyboard provides common function keys such as power on/off, carriage return, send and clear. The display shows the operation prompt and result prompt, and the display can also display the information sent from the receiver, including the title information.
微处理器(MCU)负责整机的控制,包括无线控制、显示、按键和电磁输入采集与计算;存储器用于存储手写输入的过程数据;无线通信电路(射频电路)实现无线数据的发送和接收。显示屏、键盘和手写输入单元共同构成人机交互系统。整机采用电池供电,电源管理模块包括降压型稳压电路和充电电路。The microprocessor (MCU) is responsible for the control of the whole machine, including wireless control, display, button and electromagnetic input acquisition and calculation; memory for storing handwritten input process data; wireless communication circuit (radio frequency circuit) for wireless data transmission and reception . The display screen, keyboard and handwriting input unit together form a human-computer interaction system. The whole machine is powered by battery, and the power management module includes a step-down regulator circuit and a charging circuit.
在本实施例中,微控制器选用nRF52832,集成2.4GHz无线通信电路。微控制器通过P0.07-P0.10四个IO口分别接四个按键S1-S4。In this embodiment, the microcontroller uses nRF52832 to integrate a 2.4 GHz wireless communication circuit. The microcontroller connects four buttons S1-S4 through four IO ports of P0.07-P0.10.
显示屏选用电子墨水屏,型号是GDE029A1。电子墨水屏的静态显示不需要消耗电能,为整机低功耗提供了保证。另外在学校中应用时,因电子墨水屏不发光,不会对学生的眼睛造成伤害。The display uses an electronic ink screen and the model number is GDE029A1. The static display of the electronic ink screen does not need to consume power, which provides a guarantee for the low power consumption of the whole machine. In addition, when applied in school, the electronic ink screen does not emit light and will not cause harm to the students' eyes.
微控制器通过P0.11-P0.15 IO口控制显示屏。存储器选用FLASH芯片W25X10L,通过SPI接口与微控制器通信。The microcontroller controls the display through the P0.11-P0.15 IO port. The memory uses the FLASH chip W25X10L to communicate with the microcontroller through the SPI interface.
本实施例中,手写输入单元采用电磁感应触摸屏,电磁感应触摸屏包括多 个横向采集电路和多个纵向采集电路。横向采集电路和纵向采集电路是相同的,只是感应线圈在PCB板上的方向不同。每路采集电路包括1个感应线圈、信号调理电路。信号调理包括放大电路和峰值采样电路,放大电路采用普通的三极管共基极放大电路,具有很小的工作电流;峰值采样电路使用二极管进行检波,然后通过RC滤波电路后,接入到微控制器的ADC输入引脚。本实施例中,使用了8路ADC输入,横向和纵向采集电路分别占4路。如果需要更多的采集电路以扩大手写板区域,则需要用多路复用器进行时分复用。In this embodiment, the handwriting input unit uses an electromagnetic induction touch screen, and the electromagnetic induction touch screen includes a plurality of lateral acquisition circuits and a plurality of longitudinal acquisition circuits. The lateral acquisition circuit and the longitudinal acquisition circuit are identical except that the induction coils are oriented differently on the PCB. Each acquisition circuit includes an induction coil and a signal conditioning circuit. The signal conditioning includes an amplifying circuit and a peak sampling circuit. The amplifying circuit adopts an ordinary triode common base amplifying circuit and has a small operating current; the peak sampling circuit uses a diode for detecting, and then passes through the RC filter circuit to be connected to the microcontroller. ADC input pin. In this embodiment, eight ADC inputs are used, and the horizontal and vertical acquisition circuits respectively occupy four channels. If more acquisition circuitry is needed to expand the tablet area, then a multiplexer is needed for time division multiplexing.
手写终端的电源管理电路包括稳压电路和充电电路。稳压电路采用两路XC6205组成的3.3V稳压电路,其中一路供微控制器,另一路供手写输入单元。手写输入单元的电源由微控制器关闭或开启。充电电路选用芯片CN3062,500mA锂电池充电芯片。整机使用锂聚合物电池供电,通过USB接口充电。The power management circuit of the handwriting terminal includes a voltage stabilizing circuit and a charging circuit. The voltage regulator circuit uses a 3.3V voltage regulator circuit composed of two XC6205s, one for the microcontroller and the other for the handwriting input unit. The power of the handwriting input unit is turned off or on by the microcontroller. The charging circuit uses chip CN3062, 500mA lithium battery charging chip. The whole machine is powered by a lithium polymer battery and is charged via the USB interface.
与电磁感应触摸屏配套的还有电磁笔,电磁笔的基本原理是LC振荡器,发送电磁波。电磁笔发送的电磁波被手写终端的感应线圈接收后,通过信号调理,进入到微控制器进行采样计算,定位到笔尖所处的位置。The electromagnetic pen is also matched with the electromagnetic induction touch screen. The basic principle of the electromagnetic pen is the LC oscillator, which transmits electromagnetic waves. After the electromagnetic wave sent by the electromagnetic pen is received by the induction coil of the handwriting terminal, it is processed by the signal to enter the microcontroller for sampling calculation, and the position where the pen tip is located is located.
接收器用于和手写终端进行无线通信,通过无线下发题目信息和接收手写终端上报的答案。The receiver is configured to perform wireless communication with the handwriting terminal, and issue the title information wirelessly and receive the answer reported by the handwritten terminal.
接收器与教学计算机连接,连接的接口包括USB、网口或串口。教学计算机的主机承载客户端软件,向接收器下发答题指令、题目信息数据,并从接收器获取由手写终端上报的答案。The receiver is connected to the teaching computer, and the connected interface includes a USB, a network port or a serial port. The host of the teaching computer carries the client software, delivers the answer command and the title information data to the receiver, and obtains the answer reported by the handwritten terminal from the receiver.
教学计算机的主机还连接因特网,和远程服务器进行数据交互,获取课堂互动的基本信息数据,上传课堂互动的内容和结果。教学计算机主机的显示接口接大尺寸显示屏、投影仪或电子白板。The host of the teaching computer is also connected to the Internet, interacts with the remote server, acquires basic information data of the classroom interaction, and uploads the content and results of the classroom interaction. The display interface of the teaching computer host is connected to a large-size display, projector or electronic whiteboard.
接收器(数据采集器)包括微控制器、接口电路、电源电路和多个射频电路及射频天线。The receiver (data collector) includes a microcontroller, an interface circuit, a power circuit, and a plurality of RF circuits and an RF antenna.
接口电路用于和教学计算机主机通信;电源电路用于给其他电路部分供电;微控制器负责整机的控制、通信协议处理和数据流处理;射频电路由微控制器控制,进入不同的频率和不同通信格式同时工作。The interface circuit is used for communication with the teaching computer host; the power circuit is used to supply power to other circuit parts; the microcontroller is responsible for control of the whole machine, communication protocol processing and data stream processing; the RF circuit is controlled by the microcontroller, enters different frequencies and Different communication formats work simultaneously.
本实施例中,微控制器型号是LPC1754。接口采用微控制器自带的USB接口,其通过P0.29和P0.30引出USB的D+和D-,外围电路包括ESD保护二极管和共模滤波电感。整机通过USB供电,电源电路是由CAT6218组成的5V-3.3V稳压电路。In this embodiment, the microcontroller model is LPC1754. The interface adopts the USB interface provided by the microcontroller. It leads the USB D+ and D- through P0.29 and P0.30. The peripheral circuit includes ESD protection diode and common mode filter inductor. The whole machine is powered by USB, and the power circuit is a 5V-3.3V voltage regulator circuit composed of CAT6218.
本实施例中的接收器有三路射频电路和三个射频天线。射频通信电路采用芯片nRF24L01P及其外围电路,可以和手写终端的nRF52832进行通信。天线采用PCB PIFA天线。射频电路中的一路用于短数据包通信,另外两路用于长数据包通信。The receiver in this embodiment has three RF circuits and three RF antennas. The RF communication circuit uses the chip nRF24L01P and its peripheral circuits to communicate with the nRF52832 of the handwriting terminal. The antenna uses a PCB PIFA antenna. One of the RF circuits is used for short packet communication, and the other two are used for long packet communication.
本实施例中,短数据包采用固定的2.44GHz频率,数据包长度为12字节。手写终端与接收器的注册、指令查询、客观题答案数据交互由短数据包通信完成。长数据包使用另外的物理通道,不固定频率,由接收器动态选定频率。长数据包一次传输负载是32字节,用于题目内容的下发和主观书写题答案上报。In this embodiment, the short data packet uses a fixed frequency of 2.44 GHz, and the data packet length is 12 bytes. The registration of the handwriting terminal and the receiver, the command query, and the objective question answer data interaction are completed by short packet communication. Long packets use additional physical channels, with no fixed frequency, and the frequency is dynamically selected by the receiver. The long data packet transmission load is 32 bytes, which is used for the issue of the topic content and the subjective writing question answer report.
本发明实施例采用手写终端和接收器之间的通信方式,用以取代现有技术中的专用Wifi路由器,实现了低成本短距离无线通信。手写终端和接收器之间的通信,分为短数据包通道和长数据包通道两种通信类型,短数据包通道用于上传或下发指令、短数据;长数据包通道用于上传或下发内容较长的数据。手写终端只有一个物理射频通道,一般状态都工作于短数据包状态,由接收器的指令控制器进入长数据包状态。接收器则使用一个物理通道处理短数据包,其 余物理通道在不同的频率收发长数据包,这样可以多个手写终端同时和接收器进行数据交互,增加通信带宽。The embodiment of the invention adopts a communication mode between the handwriting terminal and the receiver, which is used to replace the dedicated Wifi router in the prior art, and realizes low-cost short-range wireless communication. The communication between the handwriting terminal and the receiver is divided into two types of communication: short packet channel and long packet channel. Short packet channel is used to upload or send commands and short data; long packet channel is used for uploading or downloading. Send longer data. The handwriting terminal has only one physical RF channel, and the general state works in the short packet state, and the receiver controller enters the long packet state. The receiver uses one physical channel to process short data packets, and the remaining physical channels send and receive long data packets at different frequencies, so that multiple handwritten terminals can simultaneously perform data interaction with the receiver to increase communication bandwidth.
整套课堂互动系统的一次典型操作流程如下:A typical operational flow of the entire classroom interaction system is as follows:
教师在授课的过程中,如果需要进行答题互动,首先在大屏幕上显示题目。调取题目的方式可以是打开本地文件、打开资源网站或通过展示台摄像获取纸质文件信息。教师开启教学计算机上的客户端软件,使用软件上的答题功能开始出题。客户端软件对题目显示部分进行截图,并将图片进行压缩,下发给接收器。In the process of teaching, if the teacher needs to interact with the questions, first display the questions on the big screen. The method of retrieving the question can be to open a local file, open a resource website, or obtain paper file information through the display station. The teacher starts the client software on the teaching computer and starts using the answer function on the software. The client software takes a screenshot of the title display portion and compresses the image and sends it to the receiver.
接收器将图片信息通过无线方式分别下发给系统里的手写终端。The receiver sends the picture information to the handwriting terminal in the system wirelessly.
手写终端在显示屏上显示题目,并提示学生进行答题。The handwriting terminal displays the title on the display screen and prompts the student to answer the question.
教师下发的题目分两种类型:主观题和客观题。主观题指需要进行书写输入的题型,如:填空、问答、作图、计算;客观题指选择题、判断题、抢权等不需要手写输入的题型。如果是客观题,学生在手写终端的输入面板上点选答案,并提交。手写终端通过无线传输,将自身编码和答案数据上报到接收器。如果是主观题,学生在输入面板区,使用手写笔进行书写,书写完成后提交答案。手写终端通过无线传输将自身编码和答案数据上报到接收器。There are two types of topics issued by teachers: subjective questions and objective questions. Subjective questions refer to the types of questions that need to be written and input, such as: fill in the blanks, question and answer, drawing, and calculation; objective questions refer to multiple-choice questions such as multiple-choice questions, judgment questions, and power grabs. If it is an objective question, the student clicks on the answer on the input panel of the handwriting terminal and submits it. The handwriting terminal reports its own code and answer data to the receiver by wireless transmission. If it is a subjective question, the student uses the stylus to write in the input panel area, and submits the answer after the writing is completed. The handwriting terminal reports its own code and answer data to the receiver through wireless transmission.
接收器将数据传输到教学计算机,客户端软件收集数据后进行统计和分析,如果有网络,教学计算机将数据提交到远程服务器。The receiver transmits the data to the teaching computer, and the client software collects the data for statistics and analysis. If there is a network, the teaching computer submits the data to the remote server.
手写终端和接收器的通信流程如下:The communication process between the handwriting terminal and the receiver is as follows:
在手写终端第一次和接收器连接时,需要先进行注册。手写终端发注册请求,接收器对比白名单,如果该手写终端在白名单中,则给予注册应答,如果不在白名单内,则不予理会。When the handwriting terminal is connected to the receiver for the first time, it needs to be registered first. The handwriting terminal sends a registration request, and the receiver compares the white list. If the handwritten terminal is in the white list, the registration response is given, and if it is not in the white list, it is ignored.
教学计算机下发答题信息到接收器,接收器进入答题状态。The teaching computer sends the answer message to the receiver, and the receiver enters the answer state.
手写终端周期性的发查询信息,接收器收到查询信息,下发题目的简要信息。题目简要信息包括答题模式、题型和题目数量等。The handwriting terminal periodically sends inquiry information, and the receiver receives the inquiry information and delivers the brief information of the topic. The summary information of the topic includes the answer mode, the question type and the number of questions.
手写终端开始答题,如果手写终端支持显示题目,手写终端在答题前,发送题目详细信息请求。接收器给手写终端分配一个长数据包通道号,并指定通信的频率,回复给手写终端。The handwriting terminal starts to answer the question. If the handwriting terminal supports displaying the question, the handwriting terminal sends a topic detail information request before answering the question. The receiver assigns a long packet channel number to the handwriting terminal, and specifies the frequency of communication to reply to the handwriting terminal.
手写终端切换到指定频率的长数据包通道,以长数据包格式向接收器发送题目内容请求,接收器予以回应,切换到长数据包传输通道以长数据包格式向手写终端发送题目内容。手写终端重复发送内容请求,直到所有信息接收完。The handwriting terminal switches to the long packet channel of the specified frequency, and sends the content request to the receiver in a long packet format, and the receiver responds, switching to the long packet transmission channel to send the title content to the handwriting terminal in a long packet format. The handwriting terminal repeatedly sends a content request until all information is received.
手写终端收到题目信息后,在显示屏上显示。学生通过键盘或者手写板等输入设备输入答案,输入完成后提交。After the handwriting terminal receives the title information, it is displayed on the display. The student inputs the answer through an input device such as a keyboard or a tablet, and submits it after the input is completed.
如果是客观题或者简单的数字题,手写终端直接通过短数据包格式提交。如果是书写的是主观题答案,手写终端先通过短数据包向接收器发送长数据包通信请求。接收器给手写终端分配一个长数据包通道号,并回复给手写终端。If it is an objective question or a simple number question, the handwritten terminal is submitted directly through the short packet format. If the written question is the subjective answer, the handwritten terminal first sends a long packet communication request to the receiver through the short data packet. The receiver assigns a long packet channel number to the handwriting terminal and replies to the handwriting terminal.
手写终端切换到长数据包模式,以长数据包格式向接收器发送答案内容,接收器予以回应,接收答案数据包。手写终端重复发送答案数据包,直到所有信息发送完,重新回到短数据包通道。The handwriting terminal switches to the long packet mode, sends the answer content to the receiver in a long packet format, and the receiver responds and receives the answer packet. The handwriting terminal repeatedly sends the answer packet until all the information is sent and returns to the short packet channel.
在进行主观书写题答题时,手写终端的微控制器需要先开启手写输入单元电路,同时开启手写输入控制算法,进行笔迹采样。流程如下:When performing the subjective writing question, the microcontroller of the handwriting terminal needs to first open the handwriting input unit circuit, and simultaneously turn on the handwriting input control algorithm to perform handwriting sampling. The process is as follows:
手写终端收到题目信息后,由微控制器开启手写输入单元电路的电源,手写输入单元电路和控制算法开始运行。After the handwriting terminal receives the title information, the microcontroller turns on the power of the handwriting input unit circuit, and the handwriting input unit circuit and the control algorithm start to run.
学生使用手写笔(电磁笔)进行书写,微控制器将书写的笔迹数据以位置 点的形式存储到存储器中。The student writes using a stylus (electromagnetic pen), and the microcontroller stores the written handwriting data in memory as a location point.
学生书写完毕,点击提交按键。微控制器关闭手写输入单元电路的电源,并停止运行手写输入控制算法。Once the student has finished writing, click the Submit button. The microcontroller turns off the power to the handwriting input unit circuit and stops running the handwriting input control algorithm.
微控制器将存储的笔迹数据进行压缩,然后向接收器请求上传。The microcontroller compresses the stored handwriting data and then requests the upload to the receiver.
上述的笔迹数据压缩采用公知的二值图像压缩算法,如JBIG2开源算法。The above handwriting data compression uses a well-known binary image compression algorithm, such as the JBIG2 open source algorithm.
本发明实施例的客户端软件,运行于教学计算机主机,包括界面处理模块、接收器通信控制模块、数据本地处理模块、服务器通信模块。界面处理模块提供用户操作界面,进行屏幕截屏、图片压缩,结果呈现;接收器通信控制模块给接收器下发答题信息数据,包括题目的信息,并从接收器获取答题的结果数据;数据本地处理模块将答题数据进行简单的统计、还原和呈现;服务器通信模块从后台服务器获取班级学生信息,并将互动的整个过程数据,包括题目和每个学生的答案上报至后台服务器。The client software of the embodiment of the present invention runs on a teaching computer host, and includes an interface processing module, a receiver communication control module, a data local processing module, and a server communication module. The interface processing module provides a user operation interface, performs screen screen capture, picture compression, and results presentation; the receiver communication control module sends the answer information data to the receiver, including the information of the title, and obtains the result data of the answer from the receiver; data local processing The module performs simple statistics, restoration and presentation of the answer data; the server communication module obtains the class student information from the background server, and reports the entire process data of the interaction, including the title and the answer of each student, to the background server.
客户端软件需要将题目信息下发至接收器,接收器再传输到手写终端。为满足节省通信带宽,并达到较好的实时性,图片进行压缩处理。因终端显示是低像素的单色显示屏,显示的内容是题目信息,一般是文字和少量的单色图形,因此图片的压缩先对图片进行等比例矢量缩小到合适手写终端显示的大小,再选用二值图片压缩的算法进行压缩。手写终端收到图片后进行解压并显示。二值图片压缩算法可以选用国际通用的JBIG2算法。The client software needs to send the topic information to the receiver, and the receiver transmits it to the handwriting terminal. In order to save communication bandwidth and achieve better real-time performance, the picture is compressed. Because the terminal display is a low-pixel monochrome display, the displayed content is title information, generally text and a small amount of monochrome graphics, so the compression of the image first scales the image to a size suitable for the handwritten terminal display, and then The algorithm of binary image compression is used for compression. After the handwriting terminal receives the picture, it is decompressed and displayed. The binary image compression algorithm can use the internationally accepted JBIG2 algorithm.
上述技术方案需要围绕低功耗和低成本的终端设备两个核心需求来实现,以解决现有的平板电脑互动系统成本高、维护难的缺点。因此,本发明以上实施例的创造性在于:The above technical solutions need to be implemented around two core requirements of low power consumption and low cost terminal equipment, so as to solve the disadvantages of high cost and difficult maintenance of the existing tablet interactive system. Therefore, the inventiveness of the above embodiment of the present invention lies in:
使用单片机系统和低成本的单色显示屏、电磁输入面板(电磁感应触摸屏) 组成手写终端,来实现课堂互动的题目显示、客观按键输入答题和主观手写输入答题,硬件成本低、功耗低,便于普及推广。Using a single-chip computer system and a low-cost monochrome display, electromagnetic input panel (electromagnetic induction touch screen) to form a handwriting terminal, to achieve classroom interactive title display, objective key input answer and subjective handwriting input answer, low hardware cost, low power consumption, Easy to popularize.
使用短距离无线通信的特殊协议和方法,实现低成本的无线通信部署方案,解决了平板电脑需要使用特制Wifi路由器的高成本问题;Using a special protocol and method of short-range wireless communication to realize a low-cost wireless communication deployment solution, solving the high cost problem that a tablet computer needs to use a special Wifi router;
在本发明以上实施例中,根据系统的实际情况,使用图片比例缩小和二值图像压缩算法,由教学计算机对下发给手写终端的题目图片进行预处理,减少了冗余数据传输,满足题目显示的需要,传输速度也保证了实时性。In the above embodiment of the present invention, according to the actual situation of the system, using the image scale reduction and the binary image compression algorithm, the teaching computer preprocesses the title image sent to the handwriting terminal, thereby reducing redundant data transmission and satisfying the problem. The display needs and the transmission speed also guarantees real-time performance.

Claims (10)

  1. 一种学生终端,包括第一微控制器、显示屏、键盘和无线通信电路,其特征在于,包括电磁感应触摸屏,所述的无线通信电路是射频收发电路,显示屏、键盘、射频收发电路和电磁感应触摸屏分别接第一微控制器。A student terminal comprises a first microcontroller, a display screen, a keyboard and a wireless communication circuit, characterized in that it comprises an electromagnetic induction touch screen, the wireless communication circuit is a radio frequency transceiver circuit, a display screen, a keyboard, a radio frequency transceiver circuit and The electromagnetic induction touch screen is respectively connected to the first microcontroller.
  2. 根据权利要求1所述的学生终端,其特征在于,所述的显示屏是电子墨水屏。The student terminal of claim 1 wherein said display screen is an electronic ink screen.
  3. 一种课堂互动答题系统,包括教学计算机系统、数据采集器和学生终端,教学计算机系统的主机与数据采集器连接,其特征在于,所述的学生终端为权利要求1所述的学生终端,学生终端通过射频收发电路与数据采集器无线通信连接。A classroom interactive answering system, comprising a teaching computer system, a data collector and a student terminal, wherein the host of the teaching computer system is connected to the data collector, wherein the student terminal is the student terminal according to claim 1, the student The terminal is wirelessly connected to the data collector through the RF transceiver circuit.
  4. 根据权利要求3所述的课堂互动答题系统,其特征在于,数据采集器包括第二微控制器、接口电路和复数个射频电路,射频电路和接口电路分别接第二微控制器,接口电路接教学计算机系统的主机;所述的复数个射频电路包括一个作为短数据包传输通道的射频电路和至少一个作为长数据包传输通道的射频电路,所述的射频电路与学生终端的射频收发电路无线通信连接。The classroom interactive answering system according to claim 3, wherein the data collector comprises a second microcontroller, an interface circuit and a plurality of RF circuits, wherein the RF circuit and the interface circuit are respectively connected to the second microcontroller, and the interface circuit is connected Teaching a host computer system; the plurality of radio frequency circuits include a radio frequency circuit as a short data packet transmission channel and at least one radio frequency circuit as a long data packet transmission channel, the radio frequency circuit and the radio frequency transceiver circuit of the student terminal are wireless Communication connection.
  5. 根据权利要求3所述的课堂互动答题系统,其特征在于,教学计算机系统包括所述的主机、投影屏或电子白板,投影屏或电子白板与主机连接。The classroom interactive answering system according to claim 3, wherein the teaching computer system comprises the host, the projection screen or the electronic whiteboard, and the projection screen or the electronic whiteboard is connected to the host.
  6. 根据权利要求5所述的课堂互动答题系统,其特征在于,包括远程服务器,主机与远程服务器通过因特网连接,进行数据交互。The classroom interactive answering system according to claim 5, comprising a remote server, wherein the host and the remote server are connected via the Internet for data interaction.
  7. 根据权利要求4所述的课堂互动答题系统,其特征在于,系统的工作过程包括以下步骤:The classroom interactive answering system according to claim 4, wherein the working process of the system comprises the following steps:
    701)主机下发答题开始通知到数据采集器,数据采集器进入答题状态;701) The host sends a reply to the data collector, and the data collector enters the answer state;
    702)开机的学生终端周期性地发送查询信息,数据采集器收到查询信息,下 发题目的简要信息;702) the student terminal that is turned on periodically sends the query information, and the data collector receives the query information and sends the brief information of the topic;
    703)学生终端收到简要信息后,发送题目详细信息请求;数据采集器给学生终端分配一个长数据包通道号,指定通信的频率,并回复给学生终端;703) after receiving the brief information, the student terminal sends a request for detailed information of the topic; the data collector allocates a long packet channel number to the student terminal, specifies the frequency of communication, and replies to the student terminal;
    704)学生终端切换到长数据包模式下对应的频率,以长数据包格式向数据采集器发送题目内容请求,数据采集器切换到长数据包传输通道以长数据包格式向学生终端发送题目内容;学生终端重复发送内容请求,直到全部题目内容接收完成;704) the student terminal switches to the corresponding frequency in the long data packet mode, and sends the topic content request to the data collector in a long data packet format, and the data collector switches to the long data packet transmission channel to send the topic content to the student terminal in a long data packet format. The student terminal repeatedly sends the content request until all the content of the topic is received;
    705)学生终端收到题目内容后,在显示屏上显示;学生者通过键盘或电磁感应触摸屏输入答案,输入完成后提交;705) after receiving the content of the topic, the student terminal displays on the display screen; the student inputs the answer through the keyboard or the electromagnetic induction touch screen, and submits after the input is completed;
    706)如果是客观题或者简单的数字题,学生终端直接通过短数据包格式提交,如果是需要书写的主观题,学生终端先通过短数据包向数据采集器发送长数据包通信请求,数据采集器给学生终端分配一个长数据包通道号,回复给学生终端;706) If it is an objective question or a simple number question, the student terminal submits directly through the short data packet format. If it is a subjective question that needs to be written, the student terminal first sends a long data packet communication request to the data collector through the short data packet, and the data is collected. The device assigns a long packet channel number to the student terminal and replies to the student terminal;
    707)学生终端切换到长数据包模式,以长数据包格式向数据采集器发送答案内容,数据采集器予以接收;学生终端重复发送答案数据包,直到所有答案内容发送完毕。707) The student terminal switches to the long data packet mode, and sends the answer content to the data collector in a long data packet format, and the data collector receives the answer; the student terminal repeatedly sends the answer data packet until all the answer content is sent.
  8. 根据权利要求7所述的课堂互动答题系统,其特征在于,学生终端第一次与数据采集器连接时,先进行注册,通过电磁感应触摸屏发注册请求,数据采集器对比白名单,如果该学生终端属于白名单中的学生终端,则给予注册应答,如果不属于白名单中的学生终端,则不予理会;简要信息包括答题模式、题型和题目数量。The classroom interactive answering system according to claim 7, wherein when the student terminal is connected to the data collector for the first time, the registration is first performed, and the registration request is sent through the electromagnetic induction touch screen, and the data collector compares the whitelist if the student If the terminal belongs to the student terminal in the whitelist, the registration response is given. If it is not in the whitelist, the summary information includes the answer mode, the question type and the number of questions.
  9. 根据权利要求7所述的课堂互动答题系统,其特征在于,手写终端进行主观 题书写作答的流程如下:The classroom interactive answering system according to claim 7, wherein the handwriting terminal performs the process of writing the subjective question book as follows:
    901)学生终端收到题目信息后,由第一微控制器开启电磁感应触摸屏电路的电源,电磁感应触摸屏和控制算法开始运行;901) after receiving the title information, the first microcontroller turns on the power of the electromagnetic induction touch screen circuit, and the electromagnetic induction touch screen and the control algorithm start to run;
    902)学生使用电磁笔进行书写,第一微控制器将书写的笔迹数据以像素点的形式进行存储;902) the student writes using an electromagnetic pen, and the first microcontroller stores the written handwriting data in the form of pixels;
    903)学生书写完毕,点击提交按键,第一微控制器关闭电磁感应触摸屏的电源,并停止运行手写输入控制算法;903) After the student finishes writing, click the submit button, the first microcontroller turns off the power of the electromagnetic induction touch screen, and stops running the handwriting input control algorithm;
    904)第一微控制器将存储的笔迹数据进行压缩,然后向数据采集器请求上传;904) the first microcontroller compresses the stored handwriting data and then requests uploading to the data collector;
    905)笔迹数据压缩采用二值图像压缩算法。905) Handwriting data compression uses a binary image compression algorithm.
  10. 根据权利要求7所述的课堂互动答题系统,其特征在于,教学计算机主机上的客户端软件对题目显示部分进行截图,并将获取的图片进行压缩后下发给数据采集器。The classroom interactive answering system according to claim 7, wherein the client software on the teaching computer host performs a screenshot on the title display portion, and compresses the acquired image and sends the obtained image to the data collector.
PCT/CN2018/086462 2018-03-26 2018-05-11 Student terminal and interactive classroom question answering system WO2019184057A1 (en)

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