外文翻譯--公交車自動報(bào)站系統(tǒng)-資料下載頁
【導(dǎo)讀】傳統(tǒng)由乘務(wù)人員人工報(bào)站，這種方式因其效果太差和工作強(qiáng)度太。大，在很多大城市已經(jīng)被淘汰。近年來，隨著科學(xué)技術(shù)的日益發(fā)展和進(jìn)步，微型。計(jì)算機(jī)技術(shù)已經(jīng)在許多領(lǐng)域得到了廣泛的應(yīng)用。在聲學(xué)領(lǐng)域，微機(jī)技術(shù)與各種語。而為市民提供了更加人性化的服務(wù)。鑒于傳統(tǒng)公交車報(bào)站系統(tǒng)的不足之處，結(jié)合。語音信息以及提示語音，，同時運(yùn)用LED數(shù)碼進(jìn)行站數(shù)顯示。息在LED數(shù)碼管上顯示。整個系統(tǒng)硬件設(shè)計(jì)包括鍵盤電路、復(fù)位電路、顯示驅(qū)動。信息及服務(wù)用語，同時利用LED點(diǎn)陣電路進(jìn)行漢字顯示。本設(shè)計(jì)要求利用AT89C51. 站自動報(bào)站器的設(shè)計(jì)，對車輪軸的轉(zhuǎn)角的脈沖進(jìn)行計(jì)數(shù)，將計(jì)數(shù)值與預(yù)置值對比，即可確定報(bào)站時刻，達(dá)到準(zhǔn)確自動的目的。以AT89C51為主控芯片，對外來脈沖?？刂菩盘?、語音芯片、輸出顯示燈組成。的嵌套中斷結(jié)構(gòu)，以及一個片內(nèi)振蕩器和時鐘電路。在AT89C51單片機(jī)結(jié)構(gòu)中，行接口進(jìn)行尋址和控制。本系統(tǒng)很大程度上提高公交車報(bào)站的準(zhǔn)確性，可靠性。促進(jìn)城市經(jīng)濟(jì)發(fā)展和交通變化的和諧發(fā)展。
【正文】 ling frequency, time and recording a single chip 8 points, 10 points, 12 points, 16 points several, and its use of builtin FLASH memory cost nonvolatile CaXie memory, this fast data, and it is not lost power save data department needs power consumption. The typical stored information can save time up to 100 years, the same storage unit can be repeated be recorded 10 million times. IAD4004 chip audio output pin can drive a five thousand uefa load, when device after power up, change the power output pins for v. to this design of chosen amplifier is LM386 is for low voltage application design audio amplifier, the working voltage of 6V, maximum distortion degree of , power frequency response to 20 ~ 100 KHZ About LED display output design: This circuit USES 16 * 256 destem to display 16 16 * 16 Chinese characters, using the video memory U14 to deposit the characters bitmap information. Screen points page 32, each page 16 line 8 column LED by constitute the light emitting diode, destem with a four 16 decoder 74LS154 decode, will address A0 A3 decode formed by two do signal, 416 decoder 74LS154 form a 532 decoder, carries on the page decode, will address A4 A8 decode form page, choose munication, respectively, to choose a 74LS244 general 74LS244 data through this system to a page in a line of eight leds into display information. 3. The characteristics of the system and advantage This system greatly improve the accuracy of bus stops, and reliability. Improving the service quality of the bus system. Promote the city economic development and harmonious development of traffic changes. Made up for changing the traditional voice stops device must have driver control can work means, in the bus stops behind when the station broadcasts, automatic sixfoottall service term for the public and provide more humanized more perfect service.
鄂ICP備17016276號-1