CN203376865U - Wireless external synchronous sound wave collecting front end device - Google Patents
Wireless external synchronous sound wave collecting front end device Download PDFInfo
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- CN203376865U CN203376865U CN201320523980.4U CN201320523980U CN203376865U CN 203376865 U CN203376865 U CN 203376865U CN 201320523980 U CN201320523980 U CN 201320523980U CN 203376865 U CN203376865 U CN 203376865U
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Abstract
The utility model relates to a wireless external synchronous sound wave collecting front end device, and belongs to the field of sound wave signal detection. The wireless external synchronous sound wave collecting front end device comprises a digital signal processor, a flash memory chip, an audio frequency A/D converter, a wireless module, a static random access memory, an infrared receiving module, an RS-232 communication interface communication converter, a signal amplification circuit, a sound wave collecting microphone interface and a headphone output interface. The digital signal processor is connected with the flash memory chip, the audio frequency A/D converter, the wireless module, the static random access memory, the infrared receiving module and the RS-232 communication interface communication converter respectively. The signal amplification circuit and the audio frequency A/D converter are connected, and the signal amplification circuit is connected with the sound wave collecting microphone interface and the headphone output interface respectively. The wireless external synchronous sound wave collecting front end device is high in performance and sampling rate, large in memory capacity, capable of collecting and transmitting data in a wireless mode at the same time, and capable of being used for collecting tunnel noise conveniently.
Description
Technical field
The utility model is specifically related to a kind of wireless outer synchronous sound collecting fore device, belongs to the acoustic signals detection field.
Background technology
Sound collecting is the instrument that gathers acoustic signals.Existing sound collecting equipment highest frequency can only reach 75Mhz, and sampling rate is the highest can only reach 24k/s, and the signal that the talent collects is passed to host computer by serial ports after processing via digital processing chip.Existing wireless sound wave harvester, do not support multichannel collecting, do not support the accurate synchronous operation of multimachine yet.In order to obtain the sound field in somewhere, need a plurality of check points synchronously to be sampled, for example, the sound field sampling in tunnel, need multibreak, and many equipment is gathered simultaneously, in order to analyze the noise profile situation in tunnel.Existing sound collecting equipment, because its master chip frequency is lower, can cause acquisition and processing speed partially slow, the sample frequency of adding acquisition chip is lower, cause can not high-fidelity the reduction acoustic signals, in addition, need multiple devices to detect simultaneously, existing device synchronization rate is not high enough, can cause going back accurately the sound wave distribution character in original area.If use the serial ports signal transmission, can cause a large amount of wastes of manpower and materials.Therefore bring in before the wireless outer synchronous sound collecting of a kind of high-performance of needs, high sampling rate, accurate synchronous acquisition and energy wirelessly transmitting data and meet above-mentioned requirements.
The TMS320F2812 chip is a dsp chip that TI company produces, and TMS320F28X series is state-of-the-art 32 fixed-point DSP chip in the world today.Not only travelling speed is high for it, and processing capacity is powerful, and has abundant sheet peripheral devices, is convenient to interface and modular design.It had both had digital signal processing capability, had again powerful incident management ability and embedded Control function, was specially adapted to the observing and controlling occasion that data in enormous quantities are processed, as industrial automatic control, intelligent instrumentation and motor servo control system etc.
The CODEC chip is high performance stereo audio codec and highly integrated analog amplifier pio chip, this chip comprises AD converter (ADC) and digital-to-analog converter (DAC), can carry out the A/D conversion to analoging sound signal, the digital signal after also digital processing chip can being processed is changed the restoring acoustical signal of high-fidelity by D/A.On market, adopt CODEC chip more widely mainly to come from four major companies-Crtstal, ESS, Wolfson and SigmaTel.TI company also has and produces the CODEC chip, supports 16,20,24 and the transmission of 32 bit data length, supports the sampling rate of 8kHz to 96kHz.The CODEC chip is mainly used in the digital audio processing product, as mobile phone, and MP3, Digital Television, vehicle audio etc.
The FLASH chip is to apply storage medium very widely, has the outage storage, and erasable function, for storing the digital sound wave datum, in order to sonic data is continued to analysis and research.The manufacturer of at present common FLASH chip mainly contains Intel, SST, AMD, MXIC etc.
The RAM chip is random storage chip, has the fast characteristics of processing speed, but cuts off the power supply loss of data, therefore for storing the program of digital processing chip, but the processing speed of faster procedure.The manufacturer of at present common RAM chip mainly contains Cypress, Samsung Electronics KSE, Micron Technology Inc. etc.
Summary of the invention
The utility model is not high enough for current existing device synchronization rate, can cause going back accurately the sound wave distribution character in original area, has proposed a kind of wireless outer synchronous sound collecting fore device.
A kind of wireless outer synchronous sound collecting fore device, this device comprises digital signal processor, flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module, RS-232 communication interface communication converter, signal amplification circuit, sound collecting Mike's interface and headset output interface; Wherein,
Described digital signal processor is connected with flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module and RS-232 communication interface communication converter respectively;
Described signal amplification circuit is connected with audio A/D converter;
Described signal amplification circuit is connected with headset output interface with sound collecting Mike interface respectively.
Described digital signal processor adopts the TMS320F2812 chip.
Described audio A/D converter is selected the CODEC chip.
Described flash chip adopts the FLASH chip.
Described static RAM is selected the RAM chip.
The beneficial effects of the utility model: high-performance of the present utility model, high sampling rate, memory capacity be large, can gather simultaneously, function that can wirelessly transmitting data is convenient uses in Tunnel Noise gathers, for Multipoint synchronous collection in tunnel provides high-performance, high sampling rate, sound collecting front end easy to use, can accurately gather Tunnel Noise, and can be uploaded to fast computing machine and carry out the data processing.
The accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Embodiment
Further illustrate the technical scheme of the utility model embodiment below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of wireless outer synchronous sound collecting fore device, this device comprises digital signal processor, flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module, RS-232 communication interface communication converter, signal amplification circuit, sound collecting Mike's interface and headset output interface; Wherein, described digital signal processor is connected with flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module and RS-232 communication interface communication converter respectively; Described signal amplification circuit is connected with audio A/D converter; Described signal amplification circuit is connected with headset output interface with sound collecting Mike interface respectively; Described digital signal processor adopts the TMS320F2812 chip.Described audio A/D converter is selected the CODEC chip.Described flash chip adopts the FLASH chip.Described static RAM is selected the RAM chip.
When wireless outer synchronous sound collecting fore device is used, control sound collecting by infrared transmission module, Mike gathers sound, after acoustic signals amplifies acoustic signals by transmission line to signal amplification circuit, then imports the audio A of wireless outer synchronous sound collecting front end/D converter into.Audio A/D converter carries out the A/D conversion to acoustic signals, amplifies and processes.The acoustic signals that audio A/the D converter will be processed imports digital signal processor into, electrocardiosignal is carried out to further numeral amplification, filtering processing, the acoustic signals of the clear high-fidelity obtained, digital signal processor is also controlled flash chip acoustic signals is stored.Digital signal processor carries out wireless telecommunications by wireless module and computing machine, also can with computing machine, be connected by the RS-232 Communication Interface Converter, carries out exchanges data.Digital signal processor is stored in program in static RAM, has greatly improved the travelling speed of program, for the user provides high-performance, and the wireless outer synchronous sound collecting front end of high sync rates.
Claims (5)
1. a wireless outer synchronous sound collecting fore device, it is characterized in that, this device comprises digital signal processor, flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module, RS-232 communication interface communication converter, signal amplification circuit, sound collecting Mike's interface and headset output interface; Wherein,
Described digital signal processor is connected with flash chip, audio A/D converter, wireless module, static RAM, infrared receiver module and RS-232 communication interface communication converter respectively;
Described signal amplification circuit is connected with audio A/D converter;
Described signal amplification circuit is connected with headset output interface with sound collecting Mike interface respectively.
2. a wireless outer synchronous sound collecting fore device, is characterized in that, described digital signal processor adopts the TMS320F2812 chip.
3. a wireless outer synchronous sound collecting fore device, is characterized in that, described audio A/D converter is selected the CODEC chip.
4. a wireless outer synchronous sound collecting fore device, is characterized in that, described flash chip adopts the FLASH chip.
5. a wireless outer synchronous sound collecting fore device, is characterized in that, described static RAM is selected the RAM chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523980.4U CN203376865U (en) | 2013-08-26 | 2013-08-26 | Wireless external synchronous sound wave collecting front end device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523980.4U CN203376865U (en) | 2013-08-26 | 2013-08-26 | Wireless external synchronous sound wave collecting front end device |
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| CN203376865U true CN203376865U (en) | 2014-01-01 |
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| CN201320523980.4U Expired - Fee Related CN203376865U (en) | 2013-08-26 | 2013-08-26 | Wireless external synchronous sound wave collecting front end device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
-
2013
- 2013-08-26 CN CN201320523980.4U patent/CN203376865U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20140826 |
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| EXPY | Termination of patent right or utility model |