CN201111736Y - Multimedia antenatal training instrument - Google Patents
Multimedia antenatal training instrument Download PDFInfo
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- CN201111736Y CN201111736Y CNU2007201756736U CN200720175673U CN201111736Y CN 201111736 Y CN201111736 Y CN 201111736Y CN U2007201756736 U CNU2007201756736 U CN U2007201756736U CN 200720175673 U CN200720175673 U CN 200720175673U CN 201111736 Y CN201111736 Y CN 201111736Y
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Abstract
The utility model relates to a multimedia prenatal education instrument, comprising a power supply, a digital audio/video module and an audio channel module. The digital audio/video module adopts an MP3/MP4 player and is provided with an LCD liquid crystal display screen and a USB serial port communication interface which is connected with an external PC. The audio channel module comprises a band-pass amplifier, an audio power amplifier and a speaker, the speaker adopts an inner magnetic microphone, the range of the output frequency thereof is 500HZ to 3000Hz and the sound intensity is less than 80 decibels. The multimedia prenatal education instrument of the utility model has the advantages that: the MP3/MP4 is adopted for carrying out the digital recording and replaying the prenatal education music and film with the CD sound quality, playing the recorded fetal heart sound, fetal movement sound, placental blood vortex sound and gurgling sound with high fidelity and having the functions of family audio and video entertainment function, attached electronic book, telephone book and picture display etc., and a USB 2.0 interface is adopted to exchange the date with the external computer at any time.
Description
Technical field
The utility model relates to multimedia device, particularly a kind of multimedia Antenatal training instrument.
Background technology
At present, traditional at home and abroad prenatal culture instrument majority is single audio playing apparatus, adopts traditional analogue technique, and is transaudient by hummer, common acoustical quality difference and can't change play content at any time, and range of application is narrow.The demand that improves day by day for the user, CD Quality for example, the fetal heart sound that playback is with high fidelity recorded, movement of the foetus sound and placental blood eddy current sound and borborygmus sound etc., exist many weak points on the prior art, comprise and do not have high capacity reservoir and a display, thereby do not possess be connected with computer the interface that transmits data download and play the fetal music of multiple form, film etc. the audio/video data, make full use of conventional network resources etc.By above analysis as can be known, the backward state of traditional Antenatal training instrument can not be met the need of market, and can not have as yet at present at the digital multimedia Antenatal training instrument equipment of marketing to see.
The utility model content
The purpose of this utility model is to provide a kind of digital audio/video for multiple form fetal music, film to download and play, and also can play the multimedia Antenatal training instrument of fetal heart sound, movement of the foetus sound, placental blood eddy current sound and the borborygmus sound recorded with high fidelity.
For achieving the above object, the utility model multimedia Antenatal training instrument, comprise power supply and voice-grade channel module, described voice-grade channel module comprises bandpass amplifier, audio power amplifier and the loudspeaker that links to each other successively, also comprise a digital audio/video module, described digital audio/video module links to each other with described bandpass amplifier.
The utility model multimedia Antenatal training instrument, wherein said digital audio/video module adopts the MP3/MP4 player, and described MP3/MP4 player is provided with LCD LCDs and the USB serial communication interface that is used for linking to each other with external PC.
The utility model multimedia Antenatal training instrument, wherein said loudspeaker adopts the internal magnetization microphone, its reference frequency output 500-3000Hz, the sound intensity is less than 80 decibels.
The utility model multimedia Antenatal training instrument, wherein said power supply adopts Li-Ion rechargeable battery.
The advantage of the utility model multimedia Antenatal training instrument is: adopt MP3/MP4 to carry out that number is recorded and playback, play the fetal music, film of multiple form etc., possess functions such as family's audio frequency and video amusement function and subsidiary e-book, phone directory and picture demonstration.Adopt the internal magnetization microphone.Can play fetal heart sound, movement of the foetus sound, placental blood eddy current sound and the borborygmus sound recorded with high fidelity.Adopt 1.8 cun 65536 look LCD LCDs, resolution can reach the 220*176 pixel.Adopt the USB2.0 interface, can be at any time and external computer swap data.Built-in Li-Ion rechargeable battery, available MP3 charger or the charging of USB mouth.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that the purpose of this utility model, feature and advantage are had deep understanding.
Description of drawings
Fig. 1 is the block scheme of the utility model multimedia Antenatal training instrument;
Fig. 2 is the block scheme of digital audio/video module in the utility model multimedia Antenatal training instrument;
Fig. 3 is the circuit diagram of bandpass amplifier in the utility model multimedia Antenatal training instrument;
Fig. 4 is the circuit diagram of the utility model multimedia Antenatal training instrument intermediate power amplifier;
Fig. 5 is the circuit diagram of master control logic processing unit among Fig. 2;
Fig. 6 is the circuit diagram of Flash storer among Fig. 2.
Embodiment
With embodiment technical scheme is elaborated below.
See figures.1.and.2, the utility model multimedia Antenatal training instrument is made of digital audio/video module 2 and voice-grade channel module 3.Wherein, digital audio module 2 adopts the MP3/MP4 player, and described MP3/MP4 player is provided with LCD LCDs 21 and the USB serial communication interface 22 that is used for linking to each other with external PC.The voice-grade channel module comprises bandpass amplifier 31, audio power amplifier 32 and the loudspeaker 33 that links to each other successively, and loudspeaker 33 adopts the internal magnetization microphone, its reference frequency output 500-3000Hz, and the sound intensity is less than 80 decibels.Digital audio/video module 2 links to each other with described bandpass amplifier 31.Power supply 1 adopts built-in lithium ion chargeable battery power supply.
The main circuit and the course of work to digital audio/video module 2 and voice-grade channel module 3 in the utility model multimedia Antenatal training instrument describes respectively below.
Digital audio/video module 2 has adopted MP3/MP4 player of the prior art.With reference to Fig. 2, mainly comprise digital signal processor DSP (Digital Sign Processor), master control logic processing unit, FLASH storage control unit and Flash storer.
Digital signal processor DSP (Digital Sign Processor) is finished the task of handling transmission and decoding audio-video document, DSP can finish multiple Processing tasks in the very short time, and the energy that this process consumed is few, data transmission is administered in the master control logic unit, equipment interface control, file decoding playback etc.At first, file taken out and read the signal on the storer from internal memory, then, to decoding chip signal is decoded, the digital signal that will separate out by DSP converts simulating signal to and is connected to the voice-grade channel module again.In addition, digital audio/video module is provided with LCD display, USB interface, keystroke interface.
Wherein, master control logic processing unit chip employing model is ATJ2097.Not only determine the speed of Audio Processing, also determined special audio function, comprised multiple EQ, 3D audio.Decoding chip also is one of most important part that influences tonequality, and the decoding chip ATJ2097 that we adopt is very outstanding in these areas, and the Bootloader of its DSP has adopted HPI mouth mode.Because data, the address bus pin of HPI pin and DSP are separate on hardware, HPI mouth inside has controlling mechanism again simultaneously, so external host can not influence the normal operation of DSP when visiting the DSP internal RAM by the HPI mouth.
With reference to Fig. 6, digital audio/video module has adopted FLASH chip K9K4G08U0M, with high capacity FLASH MEMORY as primary memory hardware store voice document, the DSP program also is stored among the FLASH, reboot the high-speed RAM of DSP during operation, thereby save the program's memory space of dsp chip part.Utilize the USB serial communication circuit can realize downloading the voice document function, utilize LCDs LCD, can also download literal and read from PC at LCD by PC.FLASH chip K9K4G08U0M memory capacity is 512M, reads page or leaf needs: 6 orders, addressing period * 25ns+25 μ s+ (2K+64) * 25ns=78 μ s.The actual transfer rate of reading of K9K4G08U0M: 2KB byte ÷ 78 μ s=26.3MB/s.
Digital audio/video module 2 is provided with and is used for the USB serial communication interface that links to each other with external PC, by the exchanges data of this connectivity port realization main frame and PC, functions such as program upgrade.In order to protect main control chip, the voltage dependent resistor (VDR) of having arranged on each connecting line of USB prevents static equally.The model of voltage dependent resistor (VDR) is V1608HS03.
The keystroke interface of digital audio/video module 2 is used for main frame is carried out functional configuration; make it be operated in the state of setting; directly be connected with main control chip; adopt 4 AD conversions; the reaction velocity and the accuracy of button have been improved; increased voltage dependent resistor (VDR) simultaneously, main control chip has been played the certain protection effect.
In voice-grade channel module 3, bandpass amplifier 31 is formed the secondary filter amplifier by LM358, amplifies sound signal, the filtering clutter.Its centre frequency is 800Hz, adopts single supply center voltage power supply mode.Power amplifier 32 is made of the TDA2282 power amplifier.Sound signal is carried out power amplification, output to loudspeaker 33.Loudspeaker 33 is selected the high-quality speaker-matched, adopts the internal magnetization microphone, its reference frequency output 500-3000Hz, and the sound intensity is less than 80 decibels.
Digital audio/video module 2 is transported to the analogue audio frequency amplifying signal after changing in the bandpass amplifier 31, bandpass amplifier 31 with the frequency control of voice signal in the scope of 500-3000Hz, be the optimal frequency range of prenatal culture, by power amplifier voice signal being amplified, has been exactly audio frequency that we hear after the power amplifier output.
The following describes the advantage of the utility model multimedia Antenatal training instrument.
Adopting MP3/MP4 to carry out number records and the fetal music of the multiple form of playback, film etc., possess functions such as family's audio frequency and video amusement function and subsidiary e-book, phone directory and picture demonstration, adopt the internal magnetization microphone, can play fetal heart sound, movement of the foetus sound, placental blood eddy current sound and the borborygmus sound recorded with high fidelity.Adopt 1.8 cun 65536 look LCD LCDs, resolution can reach the 220*176 pixel.Adopt the USB2.0 interface, can be at any time and external computer swap data.
Claims (4)
1. multimedia Antenatal training instrument, comprise power supply (1) and voice-grade channel module (3), described voice-grade channel module (3) comprises bandpass amplifier (31), audio power amplifier (32) and the loudspeaker (33) that links to each other successively, it is characterized in that: also comprise a digital audio/video module (2), described digital audio/video module (2) links to each other with described bandpass amplifier (31).
2. multimedia Antenatal training instrument according to claim 1, it is characterized in that: wherein said digital audio/video module (2) adopts the MP3/MP4 player, and described MP3/MP4 player is provided with LCD LCDs (21) and the USB serial communication interface (22) that is used for linking to each other with external PC.
3. multimedia Antenatal training instrument according to claim 1 and 2 is characterized in that: wherein said loudspeaker (33) adopts the internal magnetization microphone, its reference frequency output 500-3000Hz, and the sound intensity is less than 80 decibels.
4. multimedia Antenatal training instrument according to claim 3 is characterized in that: wherein said power supply (1) adopts Li-Ion rechargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201756736U CN201111736Y (en) | 2007-09-24 | 2007-09-24 | Multimedia antenatal training instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201756736U CN201111736Y (en) | 2007-09-24 | 2007-09-24 | Multimedia antenatal training instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201111736Y true CN201111736Y (en) | 2008-09-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201756736U Expired - Fee Related CN201111736Y (en) | 2007-09-24 | 2007-09-24 | Multimedia antenatal training instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201111736Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710460B (en) * | 2009-11-27 | 2013-01-09 | 孟奇志 | Electronic device for promoting fetal brain development and method thereof |
| CN104575126A (en) * | 2013-10-23 | 2015-04-29 | 徐长超 | Method for antenatal training by sound |
-
2007
- 2007-09-24 CN CNU2007201756736U patent/CN201111736Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710460B (en) * | 2009-11-27 | 2013-01-09 | 孟奇志 | Electronic device for promoting fetal brain development and method thereof |
| CN104575126A (en) * | 2013-10-23 | 2015-04-29 | 徐长超 | Method for antenatal training by sound |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20091026 |