CN102750843B - Smart class cloud terminal based on Internet of Things - Google Patents
Smart class cloud terminal based on Internet of Things Download PDFInfo
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- CN102750843B CN102750843B CN201210244378.7A CN201210244378A CN102750843B CN 102750843 B CN102750843 B CN 102750843B CN 201210244378 A CN201210244378 A CN 201210244378A CN 102750843 B CN102750843 B CN 102750843B
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Abstract
The invention discloses a smart class cloud terminal based on the Internet of Things. The smart class cloud terminal comprises an IO (input output) controller, a CPU (central processing unit) mainboard and a wireless router core board. The IO controller controls class multimedia teaching equipment. The CPU mainboard is used for class interaction and paperless examinations. The wireless router core board is used for access of peripheral wireless equipment. The IO controller and the wireless router core board are connected with a communication port of the CPU mainboard through flexible flat cables. The IO controller is utilized to control the class multimedia teaching equipment, the wireless router core board is connected with a wireless peripheral through a first ZigBee module and a WiFi (wireless fidelity) expansion board, and the CPU mainboard controls a ZigBee handheld terminal through a second ZigBee module, so that the multimedia teaching equipment, computer auxiliary teaching equipment and technology of the Internet of Things are combined deeply, interactivity and network teaching in the real sense are achieved, intelligent management of various teaching equipment is achieved, and teaching quality and efficiency are improved.
Description
Technical field
The present invention relates to a kind of multimedia teaching facility, relate in particular to a kind of wisdom classroom cloud terminal based on Internet of Things.
Background technology
Multimedia teaching is to develop along two different clues: one is the audio-visual instruction take the audio-visual medias such as model, chart and the projection based on audio visual technology, magic lantern, recording, video recording and combination (compound media) thereof as feature, although it emphasizes " to hark " with " audiovisual " replacement, but basically, this audio-visual instruction is the teaching of approval Traditional Classroom; Another is the computer-aided instruction developing on programmed instruction of learning basis, and its original intention is to implement individualized instruction, but at present also just the multimedia of extensive style, scattered formula for teaching, add at most a campus area network.
Tradition multi-media control system, general integrated video switches and simple manual power control.Such as Wei Kemu scientific & technical corporation, the Linking All Classes all-in-one that Shanghai Five Fingers Peak enterprise provides, although integrated advanced short out-of-focus projection instrument, electronic whiteboard etc., but be only just also that middle control and the PC that multimedia is switched integrates, multimedia education system, Internet technology, advanced computer aided instruction system and the technology of Internet of things recently occurring are not carried out to degree of depth combination, do not realize interactive, networked teaching and the various teaching equipments of intelligent management of real meaning, improve the quality of teaching and efficiency.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of wisdom classroom cloud terminal based on Internet of Things, by multimedia teaching facility, advanced computer-aided instruction equipment and the technology of Internet of things recently occurring carry out degree of depth combination, realize the interactive of real meaning, networked teaching, and the various teaching equipments of intelligent management, improve the quality of teaching and efficiency.
The present invention solves the problems of the technologies described above the technical scheme adopting to be to provide a kind of wisdom classroom cloud terminal based on Internet of Things, comprising:
IO controller: input end is connected with matrix press-key, potentiometer knob, an output terminal is connected with audio frequency and video change-over switch, and another output terminal is connected with audio amplifier by volume adjuster, controls classroom multimedia teaching facility;
Cpu motherboard: an IO port is connected with handheld electronic teacher's pointer, electronic whiteboard, another IO port is connected with ZigBee handheld terminal by the 2nd ZigBee module, carries out classroom interaction and with no paper examination;
Wireless router core board: be connected with campus network, an output terminal is connected with ZigBee peripheral hardware by a ZigBee module, and another output terminal is connected the access of external wireless device is provided with WiFi peripheral hardware by WiFi expansion board;
The power end of described IO controller, wireless router core board and cpu motherboard is connected with power module, and communication ends is connected by winding displacement.
The above-mentioned wisdom classroom cloud terminal based on Internet of Things, wherein, described IO controller adopts Mega48 single-chip microcomputer, described wireless router core board adopts RT3352 chip, the master chip of described cpu motherboard adopts Intel525, and a described ZigBee module and the 2nd ZigBee module adopt CC2530 chip.
The above-mentioned wisdom classroom cloud terminal based on Internet of Things, wherein, described power module is Switching Power Supply, input 110V～220VAC, output 3.3VDC, 5VDC and 12VDC, wherein, 12VDC output terminal, by MC34063 power supply chip output-5V, is analog switch power supply; 3.3VDC output terminal is connected with the UART mouth of RT3352 chip by after pull-up resistor, and 5VDC output terminal is connected with the UART mouth of Mega48 single-chip microcomputer by after current-limiting resistance.
The above-mentioned wisdom classroom cloud terminal based on Internet of Things; wherein; the 12V DC output terminal of described power module is connected with switching transistor Q1 by stabilivolt D1; the two ends of described stabilivolt D1 are connected with the input end of photoelectric coupling disconnector K1; the output terminal of photoelectric coupling disconnector K1 and high-voltage bidirectional TVS pipe D2, resistance R 1 and capacitor C 1 are connected to form surge protection loop; resistance R 1 one end is connected with the positive pole of diode D3; the other end is connected with the positive pole of diode D4, and the negative pole of diode D3, D4 is connected together.
The above-mentioned wisdom classroom cloud terminal based on Internet of Things, wherein, described ZigBee peripheral hardware comprises lamp switch controller, curtain motor controller, projector controller, air-conditioner controller and LED display controller.
The above-mentioned wisdom classroom cloud terminal based on Internet of Things, wherein, described WiFi peripheral hardware comprises panel computer and mobile phone terminal.
The above-mentioned wisdom classroom cloud terminal based on Internet of Things, wherein, described audio amplifier comprises main sound box and secondary audio amplifier, in described main sound box, integrated 2.4G ANTENN AUDIO receives and DSP audio mixing process chip.
The present invention contrasts prior art following beneficial effect: the wisdom classroom cloud terminal based on Internet of Things provided by the invention, utilize IO controller control classroom multimedia teaching facility, wireless router core board is connected wireless peripheral by a ZigBee module with WiFi expansion board, cpu motherboard is by the 2nd ZigBee module controls ZigBee handheld terminal, thereby by multimedia teaching facility, advanced computer-aided instruction equipment and the technology of Internet of things recently occurring carry out degree of depth combination, realize the interactive of real meaning, networked teaching, and the various teaching equipments of intelligent management, improve the quality of teaching and efficiency.
Accompanying drawing explanation
Fig. 1 is the wisdom classroom cloud terminating circuit structural representation that the present invention is based on Internet of Things;
Fig. 2 is power module output voltage change-over circuit schematic diagram of the present invention;
Fig. 3 is relay drive circuit schematic diagram of the present invention.
In figure:
1 IO controller 2 wireless router core board 3 cpu motherboards
11 button 12 audio frequency and video change-over switch 13 potentiometer knobs
14 volume adjuster 15 audio amplifier 21 LED display
22 campus area networks 23 ZigBee module 24 ZigBee peripheral hardwares
25 WiFi peripheral hardware 26 WiFi expansion board 31 the 2nd ZigBee modules
32 ZigBee handheld terminal 33 handheld electronic teacher's pointer 34 electronic whiteboards
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the wisdom classroom cloud terminating circuit structural representation that the present invention is based on Internet of Things.
Refer to Fig. 1, the wisdom classroom cloud terminal based on Internet of Things provided by the invention comprises:
IO controller 1: input end is connected with matrix press-key 11, potentiometer knob 13, an output terminal is connected with audio frequency and video change-over switch 12, and another output terminal is connected with audio amplifier 15 by volume adjuster 14, controls classroom multimedia teaching facility;
Cpu motherboard 3: input end is connected with handheld electronic teacher's pointer 33, electronic whiteboard 34, output terminal is connected with ZigBee handheld terminal 32 by the 2nd ZigBee module 31, carries out classroom interaction and with no paper examination;
Wireless router core board 2: be connected with campus network 22, an output terminal is connected with ZigBee peripheral hardware 24 by a ZigBee module 23, and another output terminal is connected the access of external wireless device is provided with WiFi peripheral hardware 25 by WiFi expansion board 26;
The power end of described IO controller 1, wireless router core board 2 and cpu motherboard 3 is connected with power module, and communication ends is connected by winding displacement.
Wisdom classroom cloud terminal based on Internet of Things provided by the invention, utilize IO controller 1 to control classroom multimedia teaching facility, wireless router core board 2 connects ZigBee peripheral hardware 24 by a ZigBee module 23, by WiFi expansion board 26, connect WiFi peripheral hardware 25, cpu motherboard 3 is controlled ZigBee handheld terminal 32 by the 2nd ZigBee module 31, and concrete advantage is as follows: 1) collection teaching electronic brain and Zigbee wireless device systems are controlled in one; Built-in syntype interactive education system and intelligent examination system; 2) realize Zigbee, the covering of Wifi multiple network; 3) support campus broadcast access, support LED screen to control and urgent prediction scheme and the access of security protection burglar alarm; 4) support sensor access, by sensor, obtain environmental information, by LED display environment information.
Introducing in detail the connection of the each main modular of wisdom classroom cloud terminal based on Internet of Things provided by the invention below uses:
1) power module
Power module selects Switching Power Supply to realize the power supply of system, and input 110VAC-250VAC, exports 12V, 5V, 3.3VDC.12V input, through MC34063 power supply chip output-5V, is 74HC4052, CD40522 and the power supply of EL4342 analog switch.3.3VDC output terminal is connected with the UART mouth of RT3352 chip by after pull-up resistor R10,5VDC output terminal is connected by the RXD of the UART mouth of current-limiting resistance R13 and Mega48 single-chip microcomputer, 5VDC output terminal is connected by the TXD of the UART mouth of current-limiting resistance R17 and Mega48 single-chip microcomputer, as shown in Figure 2.Use current-limiting resistance and pull-up resistor, stable simply again, successfully realize the reliable communication of UART between 5V and 3.3V processor, be the most cheap solution.
A lot of peripheral hardwares in the present invention need to pass through relay control switch.Common relay, when being connected to perception, resistive load (as various common light fixtures, motor etc.), switch moment easily forms surge, during 220VAC, can form the potential pulse that exceedes 1KV, makes relay arcing carbon distribution, is easy to damage.General RC protection, effect is also not obvious, and need to be according to load regulation capacitance-resistance value.12V DC output terminal is connected with switching transistor Q1 by stabilivolt D1; the two ends of stabilivolt D1 are connected with the input end of photoelectric coupling disconnector K1; the output terminal of photoelectric coupling disconnector K1 and high-voltage bidirectional TVS pipe D2, resistance R 1 and capacitor C 1 are connected to form surge protection loop; resistance R 1 one end is connected with the positive pole of diode D3; the other end is connected with the positive pole of diode D4; the negative pole of diode D3, D4 is connected together (being in parallel with resistance R 1 after diode D3, D4 are oppositely connected), as shown in Figure 3.R1, C1 is common perceptual surge protection; Diode D3(M7, the i.e. patch form of 1N4007) and D4 accelerated discharging and recharging of capacitor C 1, make the circuit surge of preventing faster; D2 is high-voltage bidirectional TVS pipe (P6KE400CA), further eliminates surge.
2) wireless router core board
Wireless router core board 2 is selected RT3352 module, and its communication output terminal is fixed on base plate to expand customization by row's pin.As UART1 serial ports expansion connects a ZigBee module 23; 1 LAN mouth connects WiFi expansion board 26, Wifi and POE Wifi expansion are provided, POE (Power Over Ethernet), be also referred to as the electric power system (POL based on LAN (Local Area Network), Power over LAN) or active Ethernet (Active Ethernet), when utilizing existing standard ethernet transmission cable, transmit data and electric power, and kept and existing Ethernet system and user's compatibility.WiFi peripheral hardware 25 comprises panel computer and mobile phone terminal.
3) Zigbee module
This is the telegon of Zigbee networking, adopts CC2530 chip, power supply 3.3V.The one Zigbee module 23 is responsible for carrying out group-net communication with lamp switch controller, curtain motor controller, projector controller, air-conditioner controller and LED display controller etc.The 2nd ZigBee module 31 is connected with ZigBee handheld terminal 32, carries out classroom interaction and with no paper examination.
4) IO controller
5) in main sound box integrated 2.4G ANTENN AUDIO receive, the processing of DSP audio mixing, the broadcast step-down of 110V/70V campus.2.4G ANTENN AUDIO receives, and communicates by letter with wireless MIC, realizes Wireless amplification function.The processing of DSP audio mixing, completes the audio mixing of the audio frequency input of campus broadcast, ANTENN AUDIO, PC.Power supply 220VAC civil power.
6) electronic whiteboard, power supply+5V, by USB mouth and PC communication.
7) electronic teacher pointer receiving unit, by USB and PC communication; Portion of the handle is by antenna communication.Power supply is respectively USB and battery.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, therefore protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (7)
1. the wisdom classroom cloud terminal based on Internet of Things, is characterized in that, comprising:
IO controller (1): input end is connected with matrix press-key (11), potentiometer knob (13), an output terminal is connected with audio frequency and video change-over switch (12), another output terminal is connected with audio amplifier (15) by volume adjuster (14), controls classroom multimedia teaching facility;
Cpu motherboard (3): an IO port is connected with handheld electronic teacher's pointer (33), electronic whiteboard (34), another IO port is connected with ZigBee handheld terminal (32) by the 2nd ZigBee module (31), carries out classroom interaction and with no paper examination;
Wireless router core board (2): be connected with campus network (22), an output terminal is connected with ZigBee peripheral hardware (24) by a ZigBee module (23), and another output terminal is connected the access of external wireless device is provided with WiFi peripheral hardware (25) by WiFi expansion board (26);
Described IO controller (1), wireless router core board (2) and the power end of cpu motherboard (3) are connected with power module, and communication ends is connected by winding displacement.
2. the wisdom classroom cloud terminal based on Internet of Things as claimed in claim 1, it is characterized in that, described IO controller (1) adopts Mega48 single-chip microcomputer, described wireless router core board (2) adopts RT3352 chip, the master chip of described cpu motherboard (3) adopts Intel 525, and a described ZigBee module (23) and the 2nd ZigBee module (31) adopt CC2530 chip.
3. the wisdom classroom cloud terminal based on Internet of Things as claimed in claim 2, it is characterized in that, described power module is Switching Power Supply, input 110V～220VAC, output 3.3VDC, 5VDC and 12VDC, wherein, 12VDC output terminal, by MC34063 power supply chip output-5V, is analog switch power supply; 3.3VDC output terminal is connected with the UART mouth of RT3352 chip by after pull-up resistor, and 5VDC output terminal is connected with the UART mouth of Mega48 single-chip microcomputer by after current-limiting resistance.
4. the wisdom classroom cloud terminal based on Internet of Things as claimed in claim 3; it is characterized in that; the 12V DC output terminal of described power module is connected with switching transistor Q1 by stabilivolt D1; the two ends of described stabilivolt D1 are connected with the input end of photoelectric coupling disconnector K1; the output terminal of photoelectric coupling disconnector K1 and high-voltage bidirectional TVS pipe D2, resistance R 1 and capacitor C 1 are connected to form surge protection loop; resistance R 1 one end is connected with the positive pole of diode D3; the other end is connected with the positive pole of diode D4, and the negative pole of diode D3, D4 is connected together.
5. the wisdom classroom cloud terminal based on Internet of Things as claimed in claim 1, is characterized in that, described ZigBee peripheral hardware (24) comprises lamp switch controller, curtain motor controller, projector controller, air-conditioner controller and LED display controller.
6. the wisdom classroom cloud terminal based on Internet of Things as claimed in claim 1, is characterized in that, described WiFi peripheral hardware (25) comprises panel computer and mobile phone terminal.
7. the wisdom classroom cloud terminal based on Internet of Things as claimed in claim 1, is characterized in that, described audio amplifier (15) comprises main sound box and secondary audio amplifier, and in described main sound box, integrated 2.4G ANTENN AUDIO receives and DSP audio mixing process chip.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103414927A (en) * | 2013-08-14 | 2013-11-27 | 天脉聚源(北京)传媒科技有限公司 | Multimedia device |
| CN103687230A (en) * | 2013-12-09 | 2014-03-26 | 苏州市昇源电子科技有限公司 | RF wireless control module applied to 0-10V voltage |
| CN103985278B (en) * | 2014-05-08 | 2016-06-08 | 天津大学 | Internet of Things teaching and experimental system |
| CN106354107A (en) * | 2016-08-26 | 2017-01-25 | 厦门印天电子科技有限公司 | Smart classroom control system and its centralized control facilities |
| CN107195206A (en) * | 2017-07-14 | 2017-09-22 | 上海易教信息科技有限公司 | A kind of intelligent interaction multimedia teaching Graphic Panel system |
| CN108447323A (en) * | 2018-02-07 | 2018-08-24 | 杭州至学教育科技有限公司 | A kind of Multimedia Teaching Terminal |
| CN109218427A (en) * | 2018-09-25 | 2019-01-15 | 李昂 | A kind of intelligent multimedia instructional terminal based on Internet of Things and multimedia teaching |
| CN111856981A (en) * | 2019-04-25 | 2020-10-30 | 上海佑显科技有限公司 | IO controller |
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Denomination of invention: A smart classroom cloud terminal based on the Internet of Things Effective date of registration: 20231218 Granted publication date: 20140423 Pledgee: Shanghai Bank Co.,Ltd. Fengxian Branch Pledgor: Shanghai Yijiao Technology Co.,Ltd. Registration number: Y2023310000876 |