基于51單片機(jī)的多功能門鈴的設(shè)計(jì)外文資料翻譯(參考版)
2024-11-28 03:43本頁(yè)面
【正文】 on the contrary, should not exceed 64 bytes. But speaking in the wireless doorbell visual system, digital voice wireless transmitter module maximum data transmission rate of kbps, but the voice from the A / D chip from 64 kbps data there, as affected by the CPLD antenna bandwidth capacity and launch two factors constraints, we do not have to deal with plicated coding. 0 x99 precursor for which code for the initial bit synchronization and receive state machine reset, 0xCCCCCC data frame synchronization code, frame synchronization for eight yards behindcontrol code. Visual Round wireless doorbell system in the control code number of small, indoor to outdoor is three, has taken the initiative to monitor the lock, removable hang up. Outdoor to indoor control signal only a call button, we will design the frame synchronization byte code for the control signal transmission in the back to keep up with the control signal in bytes of voice and data units. Software using topdown design methodology, a total of five documents: the toplevel documents were, transmit modules accept modules, digital phaselocked loop and frame state machine. Toplevel document for the system clock with a 2048 kHz voice codec interface chip MC145481, including sending and receiving of two functional modules L module which is sent to send data in the original data before adding header, voice munications frame 0x99 first, 0xCC, 0xCC, 0xCC, followed by the control signal byte, in bytes of voice and data units for L receiver module is to detect and control the speech signal, the relatively plex, including digital phaselocked loop and frame status twostate, if detected 0xCC, 0 from the state into a state if a byte is 0xCC from a state into two states, or else to return to state 0。s personal and property safety. The system uses modular hybrid technology, digital voice, video simulation, the future is alldigital wireless doorbell system visualization talk of a transition, the system39。 附件 2：外文原文（復(fù)印件） Visual Round wireless doorbell in the voice munications system design and implementation First: Introduction Microelectronics technology, wireless technology and work technology for the development of modern people living environment of security, facilitate the provision of a strong technical support， This presents a smart area for the safety of the new wireless doorbell system visualization Round, On the system39。 結(jié)束語(yǔ) 本文基于無(wú)線可視對(duì)講門鈴系統(tǒng) ，對(duì)其雙向語(yǔ)音通信進(jìn)行了設(shè)計(jì)和實(shí)現(xiàn)，現(xiàn)已經(jīng)通過(guò)測(cè)試，空曠距離達(dá) 60m ，有障礙物時(shí) 30m ，語(yǔ)音清晰 。 由于語(yǔ)音信號(hào)一般都比較微弱 ，根據(jù) M u/A 律的編碼規(guī)律，有可能會(huì)出現(xiàn)長(zhǎng)連“1”的情況，從而使得接收端無(wú)法提取正確的位同步信息，所以我們對(duì)語(yǔ)音數(shù)據(jù)進(jìn)行了簡(jiǎn)單的處理，若連 “1”個(gè)數(shù)大于 或 等于 8，則第八個(gè) 1 進(jìn)行反向，即 “1”變?yōu)?“0”。 具有與語(yǔ)音編解
公司管理相關(guān)推薦
鄂ICP備17016276號(hào)-1