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论文答辩
定时
控制器
电路
设计
制作
- 资源描述：
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论文答辩定时控制器电路的设计与制作,论文答辩,定时,控制器,电路,设计,制作
- 内容简介：
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Introduct voice circuitWith the development of society and technology, the modern electronic products design pays great attention to product the easy operational type, the man-machine contact surface certainly to have to be good. The sound, the image and so on make the most important method which associates with the humanity, also is manifested in the electronic products design. Uses a pronunciation chip, lets the product open the mouth to speak, may get up strengthened function and so on propaganda brand, instruction user use, breakdown urgent prompt, entertainment, novel causes the product design to be practical, to forestall opponent by a show of strengthen feats the enemy by a surprise attack. Different product functional design and market demand, when design must correctly select the different pronunciation chip or the module achieves the best natural price ratio. Engineer may from following several aspects consider which kind of type selects the pronunciation chipAfter first, the pronunciation content transcribes the pronunciation chip, whether the content does have frequently to revise: If the pronunciation content frequently must revise, for example, recording greeting card product design and so on the electronic message machine, should use the ISD series or the APR series pronunciation recording and sending out electric circuit, these two kind of chips all support no matter what records, falls thee lectricity pronunciation content not to be able to lose, some 10second -16 minute each kind of different chip may supply the choice. The acoustic fidelity is better, may approach the magnetic tap eacoustic fidelity. If after the pronunciation content reads in does not need to revise, may consider uses OTP (disposable fever to write) the pronunciation electric circuit and to cover the membrane pronunciation electric circuitSecond, how chooses OTP perhaps the MASK pronunciation electric circuit: How these two center selects, then mainly reads the order form the quantity, the variety as well as the date of delivery. After the OTP pronunciation electric circuit must use special-purpose programming fever writing to burn into the pronunciation content edition, needs the PC machine support. This kind of chip not subscribes the quantity limit, a piece also may manufacture, the delivery is quick. Periphery part few, partition simple, the price is lower, at present has 10 second /21 second /42 second /85 second /,170 second /,341 second and so on the many kinds of models to be possible to elect (to be allowed to divide multistage application). Suits must fast promote the product, the batch few, the variety are many, the pronunciation does not have to modify the product selects. On each kind of product and so on electrical appliances, motorcycle, coal gas alarm apparatus, rental car mileage fare meter has obtained the widespread application. If the order form quantity is very big (above 20,000 pieces), request price very low application, like each kind of electronic toy, electronic praying to Buddha machine and so on product, then should use covers the membrane (MASK) the pronunciation electric circuit. At present has 3 second -360 second many kinds of specifications to supply the choice, may divide into the multistage. When MASK chip ordering has to subscribe the quantity and Man Danliang, if throws the single quantity not to be able to achieve for the first time the factory stipulation completely the single quantity, usually also must pay 1500-3000 Dollar light cover to spend (general factory all to pledge throws full stipulation quantity in a year to return light cover to spend). The production cycle is longer, usual need 35-45 day. Throws after the list, is unable to change, the risk is bigger.Third, looks at pronunciation transcribing the length: May see from the above introduction, the ISD/APR monolithic pronunciation recording and sending out chip longest recording time is16 minutes (the 4KHZ sampling rate). In this recording time, uses the ISD/APR chip to have the better natural price ratio. Flows rapidlyBMP5008 multistage recording and sending out board which the company newly promotes, uses the brand-new 32K sampling circuit design, the acoustic fidelity good, may make 4-8 minute multistage recording and sending out, also the price is low, needs the monolithic integrated circuit support not in addition, the suggestion use. If makes a longer time the sound recording (to surpass above 16 minutes), above chip superiority is not obvious, suggested uses flows rapidly companys MP3series general development board and the BSP-60 development board, its acoustic fidelity, the recording length, the easy to operate and the price and so on have the superiority, is longest may achieve for several dozens hours the sound recordings. (These two developments board detailed introduction sees this handbook thread). Fourth, looked the request the pronunciation returns puts the acoustic fidelity: The general pronunciation returns puts, the ISD/APR monolithic pronunciation recording and sending out electric circuit and the OTP/MASK chip should all be able to be competent. But regarding some acoustic fidelity request specially high situation, for instance the design medicine model heart and lungs system, the request clearly returns felt relieved, the lung normal sound, the unusual sound, the general pronunciation chip acoustic fidelity could not achieve the design effect, should use the MP3 general development board. Fifth, in the basis product design has the monolithic integrated circuit: If has the monolithic integrated circuit, the above introduced the chip basically all may use. If does not have, then only could in the OTP chip and ISD1810, 1,110, 1,420, 2,560, in APR9301, 9600 chooses.ISD4000 and the APR6000 series chip all needs the monolithicinte grated circuit support. Monolithic pronunciation recording and sending out electric circuit ISD1110 (monolithic multistage recording and sending out electric circuit, 10 second /6.4K sampling, but key modulation recording and sending out, 5V power supply) ISD1420 (monolithic multistage recording and sending out electric circuit, 20 second /6.4K sampling, but key modulation recording and sending out, 5V power supply) ISD1810 (monolithic 8-16 second may adjust single stage pronunciation recording and sending out electric circuit, the 3V power supply, 16 feet DIP seal) ISD2532/40 (monolithic multistage recording and sending out electric circuit, 32 second /8K, 40 second /6.4k sampling, but key modulation recording and sending out, 5V power supply) ISD2560/120 (monolithic multistage recording and sending out electric circuit, 60 second /8K sampling, but key modulation recording and sending out, 5V power supply) ISD3360 (60 second /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the3V power supply, the TSOP seal) ISD4002 (2 minute /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the 3V power supply) ISD4003 (4 minute /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the 3V power supply) ISD4004 (8 minute /8K multistage pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control, the 3V power supply) APR6008 (the monolithic pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control.4K/5.6K/6.4K/8K sampling rate software controllable, may record and send out 4-8 minute, the reliability well, price low, the source of goods is steady. But the bottom chirp is slightly bigger than the ISD chip) APR6016 (the monolithic pronunciation recording and sending out electric circuit, the SPI connection, needs the MCU control.4K/5.6K/6.4K/8K sampling rate software controllable, may record and send out 4-8 minute, the reliability well, price low, the source of goods is steady. But the bottom chirp is slightly bigger than the ISD chip) API8108A (10 second /8 section of OTP (programmable) pronunciation electric circuit, price low, the periphery electric circuit is succinct. Partitions simply, the delivery is quick. Does not have subscribes the quantity limit. 16 feet DIP/SOP seal, 3V-6V power supply)API840N (40 second /31 section of OTP (programmable)pronunciation electric circuit, price low, the periphery electric circuit is succinct. Partitions simply, the delivery is quick. Does not have subscribes the quantity limit. 20 feet DIP/SOP seal, 3V-6Vpower supply) AP89021/042 (21 second /42 second /8 section of /31 section of OTP (programmable) pronunciation electric circuit, price low, the periphery electric circuit is succinct. Partitions simply, the delivery is quick. Does not have subscribes the quantity limit. 16feet /20 foot DIP/SOP seal, the 2.4V-3.6V power supply, the base pin and API8108A/840N b AP89341/170/085 (341 second /,170 second /85 second /,256 section of OTP (programmable) pronunciation electric circuit, price low, the periphery electric circuit is succinct. Partitions simply, the delivery is quick. Does not have subscribes the quantity limit. Has the high acoustic fidelity pattern (PCM)/the ordinary acoustic fidelity (ADPCM) two kind of acoustic fidelity to be possible to elect. The pressed key, the MCU serial mouth control/parallel mouth control many kinds of ways trigger the way to be possible to elect. 24feet DIP seal, 2.4V-3.6V power supply). The OTP pronunciation chip introduced and makes the flow on September14, 2005The manufacture uses in the OTP pronunciation electric circuit sound document, when transcribes the new sound certainly must choose the single track pattern, the sampling frequency acts according to the pronunciation chip model which your sound length and uses to decide, sampling frequency higher, the sound acoustic fidelity is better, but can save the pronunciation long goes past short. The general OTP pronunciation chip says 10 second, 21 second, 42 seconds (for exampleAPI8108, AP8821, AP8810, AP8842), are when sampling frequency 6KHz the pronunciation length amounts to for 10 seconds. But sampling frequency if is 12KHz, then the API8108A chip actually only can save 5 seconds pronunciations. Therefore must measure the pronunciation the acoustic fidelity and the pronunciation length. According to experiences, the general sampling frequency determination is 8KHz is suitable, this frequency has given dual attention to the acoustic fidelity and the length. The document transcribes after, when memory should save VOC the form. If you transcribe the pronunciation is uses in the ISD series pronunciation chip to make the visible sound source use, takes elects 22050Hz, Mono the WAV document format as is suitaIn order to guarantee recording the effect, the sound source best uses CD, the VCD contour acoustic fidelity sound source, the use Line in, CD Audio and so on the way input. If uses the MIC sound recording, certainly must select high nurtures the divine or pristine element within oneself, well, the sensitivity lowers some MIC, also the room sound-insulated is good, the radio announcer has clear enunciation, pronunciation standard. If wants to make the product, needs to look for the specialized recording technician. Manufacture safter the computer completes, the general request makes the sounds ource the CD small dish, is best can make two kind of different forms the documents: One kind uses the 44.1Hz sampling, 16bit, thealliteration form WAV document; One kind uses the 11.025khz sampling,8bit, the single track form WAV document. 语音电路的介绍随着科技的进步和社会的发展，现代电子产品设计越来越注重产品的易使用型，人机界面一定要良好。声音、图象等做为人类交往的最重要手段，也被体现在电子产品设计中。采用一颗语音芯片，让产品开口说话，可以起到强化宣传品牌、指导用户使用、故障紧急提示、娱乐等功能，使产品设计新颖实用、先声夺人、出奇制胜。不同的产品功能设计和市场需求，在设计时必须正确选用不同的语音芯片或组件，以达到最佳的性价比。工程师可以从以下几个方面考虑选用哪种类型的语音芯片。一、语音内容录制到语音芯片后，内容是否要经常修改:如果语音内容经常要修改，例如电子留言机、录音贺卡等产品设计，应该采用ISD系列或APR系列的语音录放电路，这两种芯片都支持任录任放，掉电语音内容不会丢失，有10秒-16分钟各种不同的芯片可供选择。音质较好，可接近磁带音质。如果语音内容写入后就不需要修改，可考虑采用OTP型（一次性烧写）语音电路和掩膜型语音电路。二、如何选择OTP型或是MASK型语音电路:这两者中如何选用，则主要看定单的数量、品种以及交货期。OTP型语音电路需采用专用编程烧写器将语音内容编辑后烧入，需PC机支持。这种芯片无订量限制，一片也可以制作，交货快捷。外围元件少，分段简单，价格较低，目前有10秒/21秒/42秒/85秒/170秒/341秒等多种型号可选（均可以分多段应用）。适合需快速推出产品，批量较少，品种多，语音不需改动的产品选用。已在各种家电、摩托车、煤气报警器、出租车计价器等产品上获得广泛的应用。如果定单数量很大（2万片以上），要求价格很低的应用，如各种电子玩具、电子念佛机等产品，则应采用掩膜型（MASK）语音电路。目前有3秒-360秒多种规格供选择，可分成多段。MASK芯片定货时有一个起订量和满单量，如果首次投单量达不到厂家规定的满单数量，通常还需支付1500-3000美金的光罩费（一般厂家都承诺在一年内投满规定数量则退还光罩费）。生产周期较长，通常需要35-45天。投单以后，就无法更改，风险较大。三、看语音录制的长度：从上面介绍可以看到，ISD/APR单片语音录放芯片的最长录音时间是16分钟（4KHZ采样率）。在这个录音时间内，采用ISD/APR芯片有较好的性价比。奔流公司新
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