CN204904615U - Multimedia teaching leads class palm - Google Patents
Multimedia teaching leads class palm Download PDFInfo
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- CN204904615U CN204904615U CN201520633702.3U CN201520633702U CN204904615U CN 204904615 U CN204904615 U CN 204904615U CN 201520633702 U CN201520633702 U CN 201520633702U CN 204904615 U CN204904615 U CN 204904615U
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- palm
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Abstract
The utility model relates to a multimedia teaching leads class palm, including the 2.4G wireless transmitting palm and with computer USB interface connection's receiver, be equipped with processing of 2.4G audio frequency and wireless transmission module on wireless transmitting palm and receiver, receiver and wireless transmitting palm pass through 2.4G to sign indicating number wireless connection. The utility model discloses an advantage embodies: strengthened figure place and sample rate, increased transmission rate simultaneously and balance the consumption, improve on PCB electromagnetic compatibility, the configuration is balanced more, reasonable, choose the pick -up head of high performance -price ratio for use, the transmission chip of appropriate mix satisfies that pronunciation enlarge among the teacher multimedia teaching, the needs of care teacher vocal cord, and this technique is completely based on PC system docking simultaneously, can with two kinds of hypersystem scheme perfect combination of current trend, make up with touch -control large -size screen monitors all -in -one, let the teacher avoid the sorrow of LCD screen radiation, adding the whiteboard combination with the projection, to let the teacher reduce projection illumination tired by a wide margin.
Description
Technical field
The utility model relates to a kind of multimedia teaching facility, is specifically related to a kind of multimedia teaching and leads class palm.
Background technology
Along with the continuous propelling of IT application in education sector, to the multimedia widespread use of class, teachers and students are more and more facilitated to use the device of multimedia teaching to arise at the historic moment.But, the shortcoming of existing multimedia teaching apparatus is that audio frequency teaching equipment audio sample rate is low, cause sound misalignment, noise weight, PCB electromagnetic compatibility unreasonable allocation, and at present in product flying squirrel and audio frequency because of transmission bandwidth causes not can not simultaneously by a difficult problem for the technical transmission of 2.4G transmission bandwidth.
Utility model content
The purpose of this utility model is for deficiency of the prior art, provide a kind of low-power consumption, high-transmission efficiency, compatible good, can ensure that the multimedia teaching teacher that flying squirrel and audio frequency transmit in the band bandwidth of 2.4G leads class palm simultaneously.
For achieving the above object, the utility model discloses following technical scheme:
Class palm is led in a kind of multimedia teaching, and the receiver comprising 2.4G wireless transmit palm and be connected with computer USB interface, wireless transmit palm and receiver are provided with the process of 2.4G audio frequency and wireless transport module, described wireless transmit palm comprises button group, stm32 kernel interconnection type micro controller module, the acceleration of gravity gyro sensor module, wireless transmitter module and the pick-up head that are connected with micro controller module, and pick-up head is connected with audio processing modules, receiver comprises stm32 kernel interconnection type micro controller module, the wireless receiving module be connected with micro controller module and USB interface, receiver and wireless transmit palm by 2.4G to code wireless connections, the model of the radio receiving transmitting module on receiver and wireless transmit palm is NRF24l01, the model of acceleration of gravity gyro sensor module is MPU-6050, MPU-6050 has used the ADC of three 16 respectively to gyroscope and accelerometer, the analog quantity measured is converted into exportable digital quantity, by NRF24l01, the magnitude of angular velocity on X in MPU6050 and Z axis is sent to receiver, after receiver receives data by NRF24l01, the USB module carried by stm32 inside is sent the data to computer and carries out computing, process.
Further, on described wireless transmit palm, the concrete model of stm32 is stm32ARMCortex-M3 kernel interconnection type microcontroller stm32f103c8t6.
Further, the USB interface on described dash receiver totally two, one of them is the USB interface connecting computer, and another is debugging USB interface.
Further, the built-in chargeable lithium cell of described wireless transmit palm, chargeable lithium cell bottom is provided with USB seat and fills interface.
Further, the I/O port on the PCB of described receiver is all drawn, so that dash receiver is used as development board simultaneously.
Further, described 2.4G audio processing modules adopts the 2.4G ANTENN AUDIO scheme based on jar (unit of capacitance) method AWA8820, and Hz-KHz is 20Hz-23KHz.
Further, described button group comprises a key blank screen key, Volume Up key, volume reduce key, ppt page up key, ppt Page Down key, return previous step key, broadcasting, stop key, desktop labeling key, left mouse button, right mouse button, mouse switch, classroom feed back in time start key, classroom feeds back stop key, classroom timely feedback result query key and quiet key in time.
Class palm is led in a kind of multimedia teaching disclosed in the utility model, compared with prior art, by selecting stm32 microcontroller, MPU6050 gyroscope and NRF24l01 wireless transceiver, enhancing figure place and sampling rate, add transfer rate simultaneously and balance power consumption; PCB electromagnetic compatibility improves, configuration balances more, rationally; Select the pick-up head of high performance-price ratio, the transmission chip of appropriate mix, breaching flying squirrel and audio transmission in current product can not simultaneously by bandwidth bottleneck that 2.4G transmits, meet the needs that voice in teacher's multimedia teaching expand, take good care of teacher's vocal cords, overcome the hardship that in conventional Multi Media, classroom is frequently hurried back and forth, the complete Based PC system docking of this technology simultaneously, can with current trend two kinds of multimedia system scheme perfect combination, combine with touch-control large-size screen monitors all-in-one, allow teacher avoid the sorrow of liquid crystal display radiation; Add electronic whiteboard with projection to combine and allow teacher significantly reduce projected light according to tired.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the button schematic diagram of wireless transmit palm;
Wherein:
1-wireless transmit palm 2-receiver
101-mono-key blank screen key 102-Volume Up key
103-volume reduces key 104-ppt page up key
105-ppt Page Down key 106-returns previous step key
107-plays, stop key 108-desktop labeling key
109-left mouse button 1010-right mouse button
1011-mouse switch 1012-feeds back beginning key in classroom in time
The timely feedback result query key in stop key 1014-classroom is fed back in 1013-classroom in time
1015-quiet key 1016-Mike entrance
1017-USB seat fills interface
Embodiment
Also with reference to accompanying drawing, the utility model is further described below in conjunction with embodiment.
Refer to Fig. 1-Fig. 2.A kind of multimedia teaching leads class palm, the receiver 2 comprising 2.4G wireless transmit palm 1 and be connected with computer USB interface, and wireless transmit palm 1 and receiver 2 are provided with the process of 2.4G audio frequency and wireless transport module.Described wireless transmit palm 1 comprises button group, stm32 kernel interconnection type micro controller module, the acceleration of gravity gyro sensor module, wireless transmitter module and the pick-up head that are connected with micro controller module, and pick-up head is connected with audio processing modules; Receiver 2 comprises stm32 kernel interconnection type micro controller module, the wireless receiving module be connected with micro controller module and USB interface, receiver 2 and wireless transmit palm 1 by 2.4G to code wireless connections.
Consider actual needs, on wireless transmit palm 1, the concrete model of stm32 is stm32ARMCortex-M3 kernel interconnection type microcontroller stm32f103c8t6, the model of the radio receiving transmitting module on receiver 2 and wireless transmit palm 1 is NRF24l01, and the model of acceleration of gravity gyro sensor module is MPU-6050.MPU-6050 has used the ADC of three 16 respectively to gyroscope and accelerometer, the analog quantity measured is converted into exportable digital quantity, by NRF24l01, the magnitude of angular velocity on X in MPU6050 and Z axis is sent to receiver 2, after receiver 2 receives data by NRF24l01, the USB module carried by stm32 inside is sent the data to computer and carries out computing, process.
In the utility model, the USB interface on dash receiver totally two, one of them is the USB interface connecting computer, and another is debugging USB interface.Double-USB interface closely can directly not be inserted on computer, and can use USB line to connect when debugged program.
I/O port on the PCB of receiver 2 is all drawn, so that dash receiver is used as development board simultaneously.All drawn by I/O port, dash receiver can be used as development board and use, and extremely saves cost.
The built-in chargeable lithium cell of wireless transmit palm 1, chargeable lithium cell bottom is provided with USB seat and fills interface 1017.
2.4G audio processing modules adopts the 2.4G ANTENN AUDIO scheme based on jar (unit of capacitance) method AWA8820, and Lossless Compression, Hz-KHz is 20Hz-23KHz, need not install any software and can be connected to computer with USB, Anologaduio interface.3Mbps radio frequency (bandwidth) is a DAB really with 2.0CH high-fidelity, without compression 2.0CH digital audio channel, adopts GFSK frequency hopping, anti-interference and confidentiality is high, really realizes the erection of a pair N (N receives).
The wireless transceiver being operated in the ISM band of 2.4GHz ~ 2.5GHz comprises: frequency generator, enhancement mode " ShockBurst " mode controller, power amplifier, crystal oscillator, modulator and demodulator.
Button group comprises a key blank screen key 101, Volume Up key 102, volume reduce key 103, ppt page up key 104, ppt Page Down key 105, return previous step key 106, beginning key 1012 is fed back in broadcastings, stop key 107, desktop labeling key 108, left mouse button 109, right mouse button 1010, mouse switch 1011, classroom in time, classroom feeds back stop key 1013, classroom timely feedback result query key 1014 and quiet key 1015 in time.
Wireless transmit palm bottom is also provided with Mike's entrance 1016.
STM32 series is based on aiming at the custom-designed ARMCortex-M3 kernel of Embedded Application requiring high-performance, low cost, low-power consumption.STM32F107 adds Ethernet 10/100MAC module in USBOTG and CAN2.0B interface basis.Ethernet mac integrated on sheet supports MII and RMII, therefore, realizes a complete ethernet transceiver and only needs an outside PHY chip.Only use a 25MHz crystal oscillator can provide clock frequency to whole microcontroller, comprise Ethernet and USBOTG Peripheral Interface.The clock that microcontroller can also produce 25MHz or 50MHz exports, and drives external ethernet PHY layer chip, thus saves an additional crystal oscillator for client.
Audio-frequency function aspect, new range microcontroller provides two I2S audio interface, supports main frame and from machine two kinds of patterns, and be not only used as input but also can be used as exporting, resolution is 16 or 32.Audio sampling frequency is from 8kHz to 96kHz.Utilize the handling property that new range microcontroller is powerful, developer can use software simulating audio codec, thus eliminates the demand to external module.
USB flash disk is inserted the USBOTG interface of microcontroller, can field upgrade software; Also can download code by Ethernet and carry out software upgrading.What this function can simplify large scale system network (as remote controllers or point-of-sale terminal equipment) administers and maintains work.
Gravity sensor MPU-60X0 has used the ADC of three 16 respectively to gyroscope and accelerometer, and the analog quantity measured is converted into exportable digital quantity.In order to accurate tracking motion fast and at a slow speed, the measurement range of sensor is all that user is controlled, and it is ± 250 that gyroscope can survey scope, ± 500, ± 1000, ± 2000 °s/sec (dps), and it is ± 2 that accelerometer can survey scope, ± 4, ± 8, ± 16g.It is core of the present utility model.
In the utility model, by the magnitude of angular velocity on X in reading MPU6050 and Z axis, then dash receiver is sent to via NRF24l01, after dash receiver receives data by NRF24l01, the USB module carried by stm32 inside sends the data to computer, as long as know when use that the interface function of mouse data is just passable.
On the PCB of expelling plate, MPU6050, NRF24l01 are the ready-made modules directly used, and facilitate welding and improve to be made into power.
The utility model adopts 6 advanced axle gyroscopes and intelligent cursor stabilization technology; Adopt 2.4G wireless radio frequency transmission and non-directional multi-point remote control technology, integrate teaching multimedia computer operation, (IRS) is fed back in classroom in time, media mainly operate, electronic whiteboard marks, control the 7 most media instructional functions such as function, laser pointer and microphone in part.Start enters pairing state automatically, after successful matching, automatically proceeds to accepting state, and the receiver without pairing does not receive other palm signals, does not go here and there code between receiver.Receiver band antenna, without the need to another external antenna, built-in chargeable lithium cell, the charging of external USB seat, continuous service time >=8 hours.In the electronic whiteboard that can be applicable to current main flow and interactive large-size screen monitors two kinds of multimedia schemas, teacher realizes various activities pattern freely switch with being intended to optional position in classroom, allly annotate and comment on the whole remote-control of unexpected multimedia operations except teacher's writing on the blackboard and emphasis, alleviate teacher and using the ordinary intensity of wave of running quickly in the classroom of class hour in multimedia.
In order to power saving extends serviceable life of battery, wireless transmit palm 1 is static and automatically entered sleep state without during any button operation about 30 seconds at cursor, can wake palm up during sleep by any key.Adopt import miaow core and DSP audio frequency processing circuit, switch adopts touch key design, and long-time no signal condition has automatic shut-off function, avoids damaging and loss because forgeing caused battery; Possess quiet handoff functionality, when avoiding using mouse, audio amplifier sends keypad tone.
The above is only preferred implementation of the present utility model; should be understood that; for those of ordinary skill in the art; do not departing under prerequisite of the present utility model; the some improvement can also made the utility model and supplement; these improve and supplement, and also should be considered as protection domain of the present utility model.
Claims (6)
1. a class palm is led in multimedia teaching, it is characterized in that, the receiver comprising 2.4G wireless transmit palm and be connected with computer USB interface, wireless transmit palm and receiver are provided with the process of 2.4G audio frequency and wireless transport module, described wireless transmit palm comprises button group, stm32 kernel interconnection type micro controller module, the acceleration of gravity gyro sensor module, wireless transmitter module and the pick-up head that are connected with micro controller module, and pick-up head is connected with audio processing modules, receiver comprises stm32 kernel interconnection type micro controller module, the wireless receiving module be connected with micro controller module and USB interface, receiver and wireless transmit palm by 2.4G to code wireless connections, the model of the radio receiving transmitting module on receiver and wireless transmit palm is NRF24l01, the model of acceleration of gravity gyro sensor module is MPU-6050, MPU-6050 has used the ADC of three 16 respectively to gyroscope and accelerometer, the analog quantity measured is converted into exportable digital quantity, by NRF24l01, the magnitude of angular velocity on X in MPU6050 and Z axis is sent to receiver, after receiver receives data by NRF24l01, the USB module carried by stm32 inside is sent the data to computer and carries out computing, process, USB interface on dash receiver totally two, one of them is for connecting the USB interface of computer, another is debugging USB interface.
2. class palm is led in a kind of multimedia teaching according to claim 1, it is characterized in that, on described wireless transmit palm, the concrete model of stm32 is stm32ARMCortex-M3 kernel interconnection type microcontroller stm32f103c8t6.
3. class palm is led in a kind of multimedia teaching according to claim 1, it is characterized in that, the built-in chargeable lithium cell of described wireless transmit palm, chargeable lithium cell bottom is provided with USB seat and fills interface.
4. class palm is led in a kind of multimedia teaching according to claim 1, and it is characterized in that, the I/O port on the PCB of described receiver is all drawn, so that dash receiver is used as development board simultaneously.
5. class palm is led in a kind of multimedia teaching according to claim 1, it is characterized in that, described 2.4G audio processing modules adopts the 2.4G ANTENN AUDIO scheme based on jar (unit of capacitance) method AWA8820, and Hz-KHz is 20Hz-23KHz.
6. class palm is led in a kind of multimedia teaching according to claim 1, it is characterized in that, described button group comprises a key blank screen key, Volume Up key, volume reduce key, ppt page up key, ppt Page Down key, return previous step key, broadcasting, stop key, desktop labeling key, left mouse button, right mouse button, mouse switch, classroom feed back in time start key, classroom feeds back stop key, classroom timely feedback result query key and quiet key in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633702.3U CN204904615U (en) | 2015-08-21 | 2015-08-21 | Multimedia teaching leads class palm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633702.3U CN204904615U (en) | 2015-08-21 | 2015-08-21 | Multimedia teaching leads class palm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204904615U true CN204904615U (en) | 2015-12-23 |
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ID=54926776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520633702.3U Expired - Fee Related CN204904615U (en) | 2015-08-21 | 2015-08-21 | Multimedia teaching leads class palm |
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| Country | Link |
|---|---|
| CN (1) | CN204904615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105160947A (en) * | 2015-08-21 | 2015-12-16 | 董友生 | Multimedia teaching course introduction handheld board for teachers |
-
2015
- 2015-08-21 CN CN201520633702.3U patent/CN204904615U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105160947A (en) * | 2015-08-21 | 2015-12-16 | 董友生 | Multimedia teaching course introduction handheld board for teachers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20160821 |