CN201927209U - Student response system based on wireless communication - Google Patents
Student response system based on wireless communication Download PDFInfo
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- CN201927209U CN201927209U CN2010206468116U CN201020646811U CN201927209U CN 201927209 U CN201927209 U CN 201927209U CN 2010206468116 U CN2010206468116 U CN 2010206468116U CN 201020646811 U CN201020646811 U CN 201020646811U CN 201927209 U CN201927209 U CN 201927209U
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Abstract
The utility model relates to a student response system based on wireless communication, which comprises a hand holding terminal, a base station and a computer, wherein the hand holding terminal transmits and receives wireless communication data; the base station is connected with the computer and the hand holding terminal respectively in wired and wireless methods, therefore, on the one hand, the base station can transmit computer orders to the hand holding terminal, and on the other hand, the base station can receive data transmitted by the hand holding terminal and transmits the data to the computer; the computer receives data transmitted by the base station, issues orders to a wireless network formed by the base station and the hand holding terminal, and analyzes and displays the received data through application software; and the tutors and students can utilize the student response system to realize wireless radio frequency communication interaction, and teaching, feedback, test, analysis and evaluation are combined organically to improve study interest of the student and the teaching quality. The student response system adopts the technologies of wireless frequency agility, time division multiple access and carrier sense multiple access to solve the collision problem of wireless communication, and can also be used in short distance interactive application occasions like specialist marking and conference voting.
Description
Technical field
The utility model belongs to the educational information field, particularly a kind of networking, intellectuality and multifunctional student answering system.
Background technology
Recently decades, mutual theoretical utilization in teaching practice has caused more and more educationists' concern, and they think and want to walk out traditional " a conference hall where one person has all the say " teaching pattern that it is mutual just must to set up a kind of effective classroom.The strong instrument of modern information technologies as Faculty and Students' interaction problems in the classroom instruction, be devoted to change student's mode of learning, improve teaching efficiency.For example, in traditional teaching pattern, be check student acquisition of knowledge situation, the problem that allows a few learner answering questions teacher propose, passive and passive attitude appears in other students easily, and the teacher can't understand the overall condition that the school grasps in time.
In order to change the mutual shortcoming in traditional classroom, incorporate wireless communication technology and computer hardware technique, (Student Response System's student's answering system SRS) arises at the historic moment.The student is by wireless handheld terminal and base station and compunication, and the teacher in time receives the information that all students send, and shows in modes such as tabulation and figures.Statistical information had both comprised individual students information, had also comprised all students' Global Information.Each interactive response problem all is a slight heuristic process for the student, the student infers new knowledge from existing cognitive model, when the student finds that oneself answers the conceptual issues mistake, such cognitive conflict, make the student will experience the process of positive thinking, again active rather than the new notion of construction passively, and integrate, digest the new structure of knowledge of last formation.Meanwhile, teacher's effect is exactly to promote absorption, understanding, conversion and the creationary utilization of student to knowledge.On the classroom, use student's answering system can excite student's cognitive potentiality, bring into play teachers'leading role, thereby the interaction of realization learning aid is with long mutually.At present, pass judgment on the demand of every profession and trade numerous areas such as scoring, physical culture (and TV) contest scoring at entertainment interactive, meeting voting, democracy ballot, occurrences in human life election, project, corresponding product has appearred, these products also can be applied to classroom instruction, but lack the function that needs at teaching characteristic, for example the student races to be the first to answer a question, and calls the roll to hall etc.
The utility model content
The purpose of this utility model is to provide a kind of student's answering system based on radio communication, comprise handheld terminal, base station and computing machine, handheld terminal uses for the student, is used for carrying out alternately with the teacher, for example arrive hall roll-call, answer in real time etc., send and receive wireless communication data; The base station is respectively by wired computing machine and handheld terminal of being connected with wireless mode, and the order that computing machine is assigned sends to handheld terminal on the one hand, receives the data that handheld terminal sends on the other hand, and real-time Transmission is given computing machine; Computing machine is used to receive the data that the base station sends, and the wireless network of forming for base station and handheld terminal is issued an order, with the data that receive by the application software analysis with show; The utility model also provides Faculty and Students' exchange method of twireless radio-frequency communication, can make teaching, feedback, evaluation and test, analysis, estimate combination, improves student's learning interest and quality of instruction.The utility model adopts technology such as wireless frequency hopping, time division multiple access (TDMA) and csma to solve the collision problem of radio communication.The utility model also can be used for the mutual application scenarios of short distance such as expert's scoring, conference voting.
A kind of student's answering system based on radio communication comprises handheld terminal, base station and computing machine; Described base station is respectively by wired computing machine and handheld terminal of being connected with wireless mode, described base station and handheld terminal are formed wireless network, handheld terminal sends and receives wireless communication data, the order that computing machine is assigned in the base station sends to handheld terminal, and the data of reception handheld terminal transmission, and real-time Transmission is given computing machine, described computing machine receives the data that the base station sends, the wireless network of forming for base station and handheld terminal is issued an order, with the data that receive by the application software analysis with show.
A teacher has a computing machine, a base station at least, and several handheld terminals, and handheld terminal uses for the student, is used for carrying out alternately with the teacher, for example arrives hall roll-call, answer in real time etc., sends and receive wireless communication data.
Handheld terminal described in the utility model comprises keyboard load module, data processing module, LCD MODULE, wireless communication module and energy supply module; The student uses described keyboard load module to give the data processing module input information, carry out data processing and storage and output information by data processing module, show by the information of LCD MODULE input and output, by wireless communication module described handheld terminal and base station are carried out data wireless transmission and reception, the energy supply module adopts the alkaline battery and the lithium battery of reduced size, and the energy supply module provides operation required energy for handheld terminal.
Base station described in the utility model comprises interface module, data processing module, wireless communication module and energy supply module, interface module adopts USB commentaries on classics serial mode to link to each other with computing machine, the storage and the processing of data processing module control base station data, wireless communication module is used for the base station and handheld terminal carries out wireless transmission and receives data, the energy supply module adopts the computer interface power supply usually for the base station provides operation required energy.
The processing power of base station, storage capacity and communication capacity are relatively strong, and it connects handheld terminal and computing machine, realizes the communication Protocol Conversion between two kinds of protocol stacks, transmits computer commands simultaneously, and a data forwarding of collecting is to computing machine.The base station both can be a handheld terminal with enhancement function, had enough energy to supply with and more internal memory and computational resource, also can be the special gateway equipment that does not have keyboard input and liquid crystal display.
Handheld terminal described in the utility model has a plurality of, and their a plurality of handheld terminals and base station constitute wireless Star Network, the data that send of all handheld terminals of compiling of base station wherein, and it is transferred to continuous computing machine.
Adopt technology such as frequency hopping, time division multiple access (TDMA) and csma to solve the radio communication collision problem, different handheld terminals is distributed on the different channel of frequency difference or time slot, node will carry out carrier sense before sending Frame, when having only medium idle, just allow transmit frame, guarantee that the wireless interaction system can stablize, long-play reliably.
A common function is in the classroom instruction, and teacher sets a question, and the student sends answer by handheld terminal, and its method is carried out according to following steps:
(1) teacher shows exercise question by certain software on computers, checks for the student, also exercise question can be sent to the handheld terminal in student's hand, is presented on the liquid crystal display;
(2) teacher requires the student to make answer at exercise question, can limit the stipulated time;
(3) student imports answer by the keyboard of handheld terminal, and sends to the base station;
(4) after answer is received in the base station, send acknowledge message for immediately corresponding handheld terminal, and answer is transmitted to computing machine;
(5) computing machine is handled and is analyzed at answer, and shows in the mode of data and chart, can also be kept in the database, checks and generate form after being provided with.
Advantage of the present utility model and characteristics are embodied in the following aspects:
(1) wireless mode.Traditional wired system needs the wiring in early stage, relates to problem in many ways such as cabling, desktop fixed installation.Installing the classroom, back also with regard to relative fixed.Exist input cost bigger, shortcomings such as later maintenance expense height.The utility model adopts wireless mode, set up convenient and simple, flexible configuration, easy to maintenance.
(2) networking.Each handheld terminal and base station in the utility model have formed Star Network, and for data communication means efficiently is provided between the node.
(3) power system capacity.Hundreds of handheld terminals can be handled in base station in the utility model, can use many cover systems simultaneously, are easy to expansion.
(4) interference free performance.Aspect anti-interference, adopt technology such as frequency hopping, time division multiple access (TDMA) and csma to solve the radio communication collision problem, different handheld terminals is distributed on the different channel of frequency difference or time slot, node will carry out carrier sense before sending Frame, when having only medium idle, just allow transmit frame, guarantee that the wireless interaction system can stablize, long-play reliably.
(5) use simply.The utility model takes into full account the convenience that the user uses, and is furnished with liquid crystal display, the operation of user's intuitive, and system software is multiple functional, is simple and easy to usefulness, and the ordinary person need not training and both can skillfully use.
The utlity model has high reliability, characteristics such as real-time.In addition, computing machine can write down student's response message, and these data and information are analyzed, and analysis result both can have been done the foundation that teaching process is adjusted, and can write down each student's study schedule and effect again, printing reports.
Description of drawings
Fig. 1 is an overall construction drawing of the present utility model, 1-handheld terminal, 2-base station, 3-computing machine among the figure;
Fig. 2 is the handheld terminal structural drawing;
Fig. 3 is architecture of base station figure;
Fig. 4 is the handheld terminal hardware structure diagram of the utility model example;
Fig. 5 is the BTS hardware structural drawing of the utility model example;
Fig. 6 is the communication data packet format of the utility model example;
Fig. 7 is the time division multiple access communication mode handheld terminal transmitting time synoptic diagram of the utility model example.
Embodiment
As shown in Figure 1, the utility model by several handheld terminals C (i) (i=1, K, N), base station 1 and computing machine 3 form.Handheld terminal C (i) and base station 2 constitute the wireless network of a hub-and-spoke configuration.
In classroom instruction, an important function is that the teacher sets a question, and the student replys.Suppose total N student, each student holds a handheld terminal.The teacher shows exercise question by certain software on computers, checks for the student, also exercise question can be sent to the handheld terminal in student's hand, is presented on the liquid crystal display.Require the student to make answer, can limit the stipulated time at exercise question.The student imports answer by the keyboard of handheld terminal C (i), and sends to the base station.After answer is received in the base station, send acknowledge message for immediately corresponding handheld terminal, and answer is transmitted to computing machine, all dispose up to N student's answer.Computing machine is handled and is analyzed at answer, and shows in the mode of data and chart, can also be kept in the database, checks and generate form after being provided with.
As shown in Figure 2, handheld terminal in the utility model comprises keyboard load module 1.1.1, data processing module 1.1.2, LCD MODULE 1.1.3, wireless communication module 1.1.4 and energy supply module 1.1.5, information input when using that keyboard load module 1.1.1 is used for the student, data processing module 1.1.2 data processing module is responsible for controlling the operation of whole handheld terminal, storage and deal with data, LCD MODULE 1.1.3 is responsible for the demonstration at input and output, wireless communication module 1.1.4 is used for handheld terminal and the base station is carried out wireless transmission and received data, energy supply module 1.1.5 adopts the alkaline battery and the lithium battery of reduced size usually for handheld terminal provides operation required energy.
As shown in Figure 3, base station in the utility model comprises interface module 2.1.1, data processing module 2.1.2, wireless communication module 2.1.3 and energy supply module 2.1.4, interface module 2.1.1 is used for linking to each other with computing machine, usually adopt USB to change serial mode, data processing module 2.1.2 is responsible for controlling the storage and the processing of base station data, wireless communication module 2.1.3 is used for the base station and handheld terminal carries out wireless transmission and receives data, energy supply module 2.1.4 adopts the computer interface power supply usually for the base station provides operation required energy.
Fig. 4 is an instance graph of handheld terminal hardware configuration.Handheld terminal comprises keyboard input circuit 4.1 (4*4 matrix keyboard), data processing module 4.2 (STC89LE52RC processor), liquid crystal 4.3 (chip for driving HT1621 and 6 segmentation liquid crystal), wireless transceiver 4.4 (NRF905), power management 4.5 (TPS79330), power supply 4.6 (2 joint AA battery).STC89LE52 is the 51 serial low-voltage single-chip microcomputers of STC Corporation, selects it as micro controller unit, is because this chip has advantages such as super low-power consumption and low price.Use information such as segmentation liquid crystal display user input, simple in structure, energy consumption is lower.NRF905 monolithic wireless transceiver is the monolithic radio frequency emitter chip that Norway Nordic company releases, and operating voltage is 1.9-3.6V, and 32 pin QFN encapsulate (5mm * 5mm), work in 433/868/915MHz ISM channel (can freely use).In order to cut down the consumption of energy, adopt power management, when system in the time of the free time, close the power supply of Liquid Crystal Module and wireless transceiver.Power supply adopts the AA battery, is convenient to change, and has versatility.
Fig. 5 is an instance graph of BTS hardware structure.Base station data processing module 5.1STC89LE52RC processor), wireless transceiver 5.2 (NRF905), power supply 5.3 (adopting the USB power supply).Because the base station links to each other by USB with computing machine, so power supply 5.3 adopts USB interface 5V power supply.
Figure 6 shows that a kind of version, form by frame head 6.1, data length 6.2, handheld terminal numbering 6.3, key value 6.4, postamble 6.5 based on handheld terminal and base station communication packet in student's answering system of radio communication.Sending node ID and key value have been comprised in the packet, by a byte representation.Whole length of data package is 5, so need be modified as 0x05 to the length control register in the NRF905 configuration register array.Send length and receive length and all will revise together, when system configuration NRF905, will be configured to 5 bytes of a frame to the transmitting-receiving byte of module automatically like this.
For solving the radio communication collision problem, this example has adopted two kinds of methods: time division multiple access (TDMA) (TDMA) and frequency division multiple access (FDMA).
(1) time division multiple access (TDMA)
Time is divided into periodic frame (Frame), and each frame is divided into several slots again to base station transmit signals, and under regularly satisfied and synchronous condition, the base station can receive the signal of each handheld terminal respectively and not mix and disturb in each time slot.Simultaneously, the signal that the base station is sent to handheld terminal all is arranged in order in the predetermined time slot and transmits, and each handheld terminal just can be issued its signal distinguishing and receive by handle in close the signal on road as long as receive in the time slot of appointment.In order to realize the time division multiple access communication mode, need time synchronized between handheld terminal and the base station.The handheld terminal transmitting time is distributed as shown in Figure 7.Enter the detection key-press status after the handheld terminal program initialization, press and send if detect button, node just begins to receive the synchronizing signal that the base station sends.After receiving synchronizing signal, handheld terminal produces a delay relevant with the numbering of oneself after key value add is sent Frame, key value is sent after promptly waiting for one's own transmit time segments.If in 2 seconds, do not receive synchronizing signal, just regard as not work of base station this moment, the handheld terminal liquid crystal display can show relevant information, and reenters the detection key-press status.
(2) frequency division multiple access
Frequency division multiple access is a kind of technology in the data communication, and it is identical and on the channel that frequency is different to be meant that different users is distributed in time slot.That is to say that the available frequencies bandwidth is split as the subchannel that has than narrow bandwidth, and each subchannel all is independent of other subchannels, thereby can be assigned to single sending node.For example Chang Yong ISM band can be divided into communication channel 512 sub-channels, provides possibility for using to communicate between different sub-channels and the different handheld terminal like this, has effectively reduced communication collision.For realizing the fdma communication mode, each handheld terminal is fixed on the different sub-channel, and base station switching channels at any time receives the data that send from different channel.It is the frequency of operation that is used for being provided with radiofrequency signal that special register is arranged in the registers group of NRF905, frequency hopping also be utilize it this function apace the value of translation register realize.NRF905 has the very short channel switch time, so it can realize frequency hopping function.
Claims (5)
1. the student's answering system based on radio communication is characterized in that, comprises handheld terminal (1), base station (2) and computing machine (3); Described base station is respectively by wired computing machine and handheld terminal of being connected with wireless mode, described base station and handheld terminal are formed wireless network, handheld terminal sends and receives wireless communication data, the order that computing machine is assigned in the base station sends to handheld terminal, and receive the data that handheld terminal sends, and real-time Transmission is given computing machine, the data that described computing machine reception base station sends, the wireless network of forming for base station and handheld terminal is issued an order, with the data analysis that receives with show.
2. a kind of student's answering system according to claim 1 based on radio communication, it is characterized in that described handheld terminal comprises keyboard load module (1.1.1), data processing module (1.1.2), LCD MODULE (1.1.3), wireless communication module (1.1.4) and energy supply module (1.1.5); The student uses described keyboard load module (1.1.1) to give data processing module (1.1.2) input information, carry out data processing and storage and output information by data processing module, show by the information of LCD MODULE (1.1.3) input and output, by wireless communication module (1.1.4) described handheld terminal and base station are carried out data wireless transmission and reception, energy supply module (1.1.5) adopts the alkaline battery and the lithium battery of reduced size, and the energy supply module provides operation required energy for handheld terminal.
3. a kind of student's answering system according to claim 1 based on radio communication, it is characterized in that, described base station is a handheld terminal with enhancement function, has enough energy to supply with and more internal memory and computational resource, or does not have the gateway device of keyboard input and liquid crystal display.
4. a kind of student's answering system based on radio communication according to claim 1 is characterized in that described base station comprises interface module (2.1.1), data processing module (2.1.2), wireless communication module (2.1.3) and energy supply module (2.1.4); Interface module (2.1.1) adopts USB commentaries on classics serial mode to link to each other with computing machine, the storage and the processing of data processing module (2.1.2) control base station data, wireless communication module (2.1.3) is used for the base station and handheld terminal carries out wireless transmission and receives data, energy supply module (2.1.4) adopts the computer interface power supply for the base station provides operation required energy.
5. a kind of student's answering system according to claim 1 based on radio communication, it is characterized in that described handheld terminal (1) has a plurality of, they and base station constitute wireless Star Network, wherein the data that all handheld terminals send are compiled in the base station, and it is transferred to continuous computing machine.
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| CN2010206468116U CN201927209U (en) | 2010-12-08 | 2010-12-08 | Student response system based on wireless communication |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622919A (en) * | 2012-03-05 | 2012-08-01 | 王光辉 | Handle transceiving system and working method thereof |
| CN102750845A (en) * | 2012-06-21 | 2012-10-24 | 东北大学 | Interactive teaching system and method |
| CN103258451A (en) * | 2013-05-09 | 2013-08-21 | 何凯佳 | Classroom teaching auxiliary system |
| CN103294841A (en) * | 2012-03-05 | 2013-09-11 | 北京千橡网景科技发展有限公司 | Computing method and system for information collecting |
| CN103366611A (en) * | 2012-03-27 | 2013-10-23 | 希伯仑股份有限公司 | A teaching system using hand-held control apparatuses and an operating system |
| CN103729950A (en) * | 2013-11-29 | 2014-04-16 | 上海斐讯数据通信技术有限公司 | Intelligent preemptive answer system based on mobile terminals and preemptive answer method of intelligent preemptive answer system |
| CN104021703A (en) * | 2014-06-13 | 2014-09-03 | 宁波凌翔网络科技有限公司 | Intelligence education terminal system |
| CN104603827A (en) * | 2012-05-16 | 2015-05-06 | 学习时代公司 | Mentor-tuned guided learning in online educational systems |
| CN104602348A (en) * | 2013-10-31 | 2015-05-06 | 深圳市启望科文技术有限公司 | Multi-channel communication method and host |
| CN109637231A (en) * | 2019-01-21 | 2019-04-16 | 郑州幼儿师范高等专科学校 | A kind of classroom instruction classroom interactions device |
-
2010
- 2010-12-08 CN CN2010206468116U patent/CN201927209U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622919A (en) * | 2012-03-05 | 2012-08-01 | 王光辉 | Handle transceiving system and working method thereof |
| CN103294841A (en) * | 2012-03-05 | 2013-09-11 | 北京千橡网景科技发展有限公司 | Computing method and system for information collecting |
| CN103366611A (en) * | 2012-03-27 | 2013-10-23 | 希伯仑股份有限公司 | A teaching system using hand-held control apparatuses and an operating system |
| CN104603827A (en) * | 2012-05-16 | 2015-05-06 | 学习时代公司 | Mentor-tuned guided learning in online educational systems |
| CN102750845A (en) * | 2012-06-21 | 2012-10-24 | 东北大学 | Interactive teaching system and method |
| CN103258451A (en) * | 2013-05-09 | 2013-08-21 | 何凯佳 | Classroom teaching auxiliary system |
| CN104602348A (en) * | 2013-10-31 | 2015-05-06 | 深圳市启望科文技术有限公司 | Multi-channel communication method and host |
| CN104602348B (en) * | 2013-10-31 | 2018-01-16 | 深圳市启望科文技术有限公司 | A kind of multichannel communication method and main frame |
| CN103729950A (en) * | 2013-11-29 | 2014-04-16 | 上海斐讯数据通信技术有限公司 | Intelligent preemptive answer system based on mobile terminals and preemptive answer method of intelligent preemptive answer system |
| CN104021703A (en) * | 2014-06-13 | 2014-09-03 | 宁波凌翔网络科技有限公司 | Intelligence education terminal system |
| CN109637231A (en) * | 2019-01-21 | 2019-04-16 | 郑州幼儿师范高等专科学校 | A kind of classroom instruction classroom interactions device |
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Granted publication date: 20110810 |