【正文】 。該芯片能將被測電流 I 轉(zhuǎn)化成對地輸出電壓 U，且有測量范圍大、精度高、輸出電壓 U 和被測電流 I 成正比等特點(diǎn)。電流監(jiān)視功能是為了防止通信線路酌人為破壞和電磁執(zhí)行器因某種原因造成流過電磁線圈的電流過大而燒毀線圈。在發(fā)送端，電子鎖具通過脈沖變壓器 T 將調(diào)制好的數(shù)據(jù)信號升壓后發(fā)送出 i 在接收端，脈沖變壓器 T 將接收到的數(shù)據(jù)信號降壓后送解調(diào)器，以減少載波信 號在傳輸過程中的損耗。系統(tǒng)接收鍵入的代碼，并與儲存在FLASH 中的密碼進(jìn)行比較，如果正確，則驅(qū)動電磁執(zhí)行打來密碼鎖；如果不正確，則允許操作員從新輸入密碼，最多可以輸入三次，如果三次都不正確，則系統(tǒng)通過通信線路向智能系統(tǒng)報警。識別的具體方法是掃描：一個一個置低電平，檢查各線電平的變化，如果有一根線的電平從低電平調(diào)到高電平，則可以確定此行和列的交叉點(diǎn)有鍵被按下了。本設(shè)計采用喚醒功能和 10 個低八位的IOA0~IOA7 接 4*4 的鍵 盤來控制輸入，這個可以合理的使用硬件資源和編程的靈活性。整個過程顯示采用動態(tài)顯示，即 6 位顯示器循環(huán)顯示，每個顯示器維持 1 毫秒或者 10 毫秒一個周期，也可以做一些相似的改動，但是每次刷新不能少于一秒 30 下，由于視覺現(xiàn)象的暫時停留， 6 位七段發(fā)光二極管呈現(xiàn)的是在同一時間顯示。但是通過一系列的訓(xùn)練可以是語音認(rèn)證系統(tǒng)和識別系統(tǒng)提 高。本系統(tǒng)是采用硬件和軟件密切結(jié)合的方式來操作語音控制系統(tǒng)的靈活性的。系統(tǒng)的主要功能有 :在訓(xùn)練時，說話人的聲音通過一個麥克風(fēng)進(jìn)入語音信號采集前端，由語音信號處理電路對采集的語音進(jìn)行特征化和語音處理，提取說話者的聲音特征并進(jìn)行存儲，一個說話者的聲音數(shù)據(jù)庫就形成了。在這篇文章中，運(yùn)用語音識別技術(shù)和鍵盤輸入相結(jié)合來達(dá)到電子密碼鎖的認(rèn)證。他們實(shí)在傳統(tǒng)密碼鎖的基礎(chǔ)上，運(yùn)用一個或者更多的密碼。現(xiàn)在的電子鎖是廣泛應(yīng)用的核心芯片。 由于電子密碼鎖的密碼進(jìn)入控制電路或芯片，從而控制機(jī)械開關(guān)關(guān)閉，鎖完成后，關(guān)閉了電子產(chǎn)品的任務(wù)。但是市場上的電子密碼鎖只有大公司才有資金購買，電子密碼鎖的價格高的嚇人，普通民眾根本購買不起。因此越來越多的居民擔(dān)心財產(chǎn)安全。人民生活水平有很大提高。這種密碼鎖不僅安全性好，高效，可靠性高，而且具有語音識別技術(shù)，密碼設(shè)置，保密性強(qiáng)和誤碼提示等特點(diǎn)。 電子密碼鎖介紹 本設(shè)計是采用語音識別技術(shù)和按鍵輸入控制，來實(shí)現(xiàn)電子密碼鎖語音技術(shù)系統(tǒng)認(rèn)證。時序電路 的特點(diǎn)是：輸出不僅取決于當(dāng)時的輸入值，而且還與電路過去的狀態(tài)有關(guān)。電路沒有記憶功能，輸出狀態(tài)隨著輸入狀態(tài)的變化而變化，類似于電阻性電路，如加法器、譯碼器、編碼器、數(shù)據(jù)選擇器等都屬于此類。 數(shù)字邏輯電路分類（按功能分） 組合邏輯電路 簡稱組合電路 ， 它由最基本的的邏輯門電路組合而成。s current l voltage converter chip MAX471. The chip can be measured current I into pairs to the output voltage U, and is measured Wai, high precision and U output voltage proportional to the measured current I characteristics. Current monitor output voltage service A / D converter, read through the single A / D converter results in the current line was informed of the situation, through the timely detection of abnormal, issued its report. The system uses voice processing and control system, easy to use, easy to use. but the speech recognition capabilities have yet to be improved. Electronic password lock technology development so far, has been widely used m higher property security areas as information technology and puter technology and the constant development, voice, electronic password lock technology win have greater development and. ultimately, achieving efficiency, safety and reliable Voiceprint control of the voice of electronic locks. 基于 VHDL 的密碼鎖設(shè)計 20 附錄 2 中文翻譯 數(shù)字電路介紹 數(shù)字電路的定義 用數(shù)字信號完成對數(shù)字量進(jìn)行算術(shù)運(yùn)算和邏輯運(yùn)算的電路稱為數(shù)字電路，或數(shù)字系統(tǒng)。s voice through a microphone into the speaker voice signal acquisition frontend. circuit, by voice signal processing circuit on the acquisition of the characteristics of voice signals and voice processing, from the speaker39。s living standard had the very big enhancement. Each kind of upscale electrical appliances product and the valuables have for many some unlawful elements are also more and more. This sees majority of person security consciousness also insufficient. Creates steals the phenomenon to be mon. Therefore, more and more resident families worried to the property security problem. the alarm apparatus had been solving many problems by now for the people. But in the market alarm apparatus majority of use in some big pany fiscal institution. The price is soaring, generally the people accept with difficulty. Ifredesignsand produces one kind moderatelypriced, the performance keen reliable burglar alarm, will certainly plays a more effective role in security and the guarantee property security aspect. As the electronic code lock is a password to enter the control circuits, or chips, so as to 基于 VHDL 的密碼鎖設(shè)計 18 control mechanical switches closed, the pletion of the lock, closed the task of electronic products. It39。s timing difference is that the circuit has a memory function. Timing circuit is characterized by: not only depend on the output value of the input, but also with the state circuit in the past. It is similar to the energy storage device with the inductor or capacitor circuit, such as flipflops, latches, counters, shift register, memory circuits, and so are the typical timing circuit devices. To Introduce electronic password lock The design is the use of voice recognition technology and keyboard input, achieving a voice electronic password lock authentication system. Voice recognition and electronic password lock function of the ordinary locks, and dual role of security. The password lock safe. effective. reliable. but also has voice recognition, password Preferences. confidentiality strong, tips and other features of error. Recent years, along with reform and open policy thorough development, electronic appliance39。在此次畢業(yè)設(shè)計的撰寫能夠順利結(jié)束，要特別感謝那些幫助過我 的人，要謝謝我的導(dǎo)師，本學(xué)位論文是在我的導(dǎo)師的細(xì)心指導(dǎo)下完成的，從選題到論文的最終定稿，都離不開導(dǎo)師的指導(dǎo)；也要謝謝我的同學(xué)，在我遇到難題時給我?guī)椭?。通過與自設(shè)定的密碼相比較，看正確與否。 本論文通過 VHDL 語言實(shí)現(xiàn)了數(shù)字密碼鎖的設(shè)計，該密碼鎖雖然是有 鍵盤 輸入的，但是可以實(shí)現(xiàn)密碼位數(shù)的自設(shè)定。在這幾個月的學(xué)習(xí)中，讓我又重新學(xué)習(xí)了一邊 VHDL 語言，也才知道自己之前學(xué)的有多差。在做畢業(yè)設(shè)計的過程中讓我學(xué)到了很多東西，也知道自己 遠(yuǎn)遠(yuǎn)不夠好。當(dāng) m 為 1 時，此時修改密碼，將密碼設(shè)為 8739，然后按 esc 退出鍵。當(dāng) m 為 1 時，因?yàn)槊艽a