產(chǎn)地	深圳
尺寸	143mm/75mm/28mm
電源電壓	220V
額定電流	10A
額定電壓	220V
類型	可視門鈴
鈴聲	多種
適用范圍	可視門鈴
消耗功率	小（W）
用途	門鈴
執(zhí)行質(zhì)量標(biāo)準(zhǔn)	國標(biāo)
電源方式	交流
品牌	galileostar
型號(hào)	K509
圖象重顯率	1.0

主要用在商品住宅樓酒旷，通過呼叫雳犹，進(jìn)行可視對(duì)話，確定來訪身份渡表。
在娶讽，可視門鈴作為便捷的實(shí)用產(chǎn)品，從九十年代末至今赐罪，主要應(yīng)用在商品住宅樓涉等，規(guī)模迅速發(fā)展，目前已經(jīng)普遍進(jìn)入城市小區(qū)中高層住宅详础。使用時(shí)程挑，住戶聽到鈴聲，像接聽可視電話一樣普易，接受來訪者通過樓下門口主機(jī)的呼叫臊耳，進(jìn)行對(duì)話，同時(shí)住戶家中的可視分機(jī)可通過樓下主機(jī)攝像頭接收視頻影像畜股，住戶觀察分機(jī)顯示屏幕上的監(jiān)控圖像確認(rèn)來訪者的身份颈侈，后決定是否按下室內(nèi)分機(jī)的**按鈕，打開連接門口主機(jī)的電控門鎖闷旧，允許來訪客人開門進(jìn)入长豁。
可視門鈴，運(yùn)用在一棟或多棟住宅樓中忙灼，多個(gè)住戶共同使用一個(gè)門口主機(jī)中蕉斜，通常被稱之為可視對(duì)講系統(tǒng)、樓宇可視對(duì)講系統(tǒng)缀棍；而運(yùn)用在單個(gè)住戶中，如別墅机错，通常被稱之為獨(dú)戶可視門鈴或別墅可視門鈴爬范。
可視門鈴目前在全球各地的城市住宅中，已經(jīng)普遍使用弱匪，它的生產(chǎn)制造商主要集中在安全防范行業(yè)相對(duì)發(fā)達(dá)的廣東省深圳青瀑、廣州和福建省的廈門等城市。
可視對(duì)講系統(tǒng)是小康住宅服務(wù)措施萧诫，提供訪客與住戶之間雙向可視通話斥难，達(dá)到圖像、語音雙重識(shí)別從而增加安全可靠性，同時(shí)節(jié)省大量的時(shí)間蟹梗，提高了工作效率膜暴。更重要的是，一旦住家內(nèi)所安裝的門磁開頭尚稍、紅外報(bào)警探測器道暑、煙霧探險(xiǎn)測器、瓦斯報(bào)警器等設(shè)備連接到可視對(duì)講系統(tǒng)的保全型室內(nèi)機(jī)上以后竭珊，可視對(duì)講系統(tǒng)升級(jí)為一個(gè)安全技術(shù)防范網(wǎng)路人蕊，它可以與住宅小區(qū)物業(yè)管理中心或小區(qū)警衛(wèi)有線或無線通訊，從而起到防盜震头、防災(zāi)锤镀、防煤氣泄漏等安全保護(hù)作用，為屋主的生命財(cái)產(chǎn)安全提供大程度的保障殊青。它可提高住宅的整體管理和服務(wù)水平手索，創(chuàng)造安全社區(qū)居住環(huán)境，因此逐步成為小康住宅不可缺少的配套設(shè)備褐袒。
可視門鈴系統(tǒng)是一種用于高層住宅啼术、公寓大廈內(nèi)外，戶間信息傳遞载碌，防盜門控制和在緊急情況下住戶向樓宇值班室報(bào)警的設(shè)備猜嘱。它以功能齊全、性能可靠嫁艇、其容量大朗伶、造型美觀、安裝使用方便而深受廣大用戶歡迎步咪，并且也在安全生活小區(qū)中得到了廣泛的應(yīng)用论皆。
一、可視門鈴系統(tǒng)工作原理
來訪者可通過樓下單元門前的主機(jī)方便地呼叫住戶并與其對(duì)話猾漫，住戶在戶內(nèi)控制單元門的啟閉点晴，小區(qū)的主機(jī)可以隨時(shí)接收住戶報(bào)警信號(hào)傳給值班主機(jī)通知小區(qū)保衛(wèi)人員，系統(tǒng)不僅增強(qiáng)了高層住宅安全保衛(wèi)工作悯周，而且方便了住戶粒督，減少許多不必要的上下樓麻煩。
二禽翼、可視對(duì)講系統(tǒng)的工作方式
樓門平時(shí)總處于閉鎖狀態(tài)屠橄，避免非本樓人員在未經(jīng)允許的情況下進(jìn)入樓內(nèi)，本樓內(nèi)的住戶可以用鑰匙自由的出入大樓硫忆。當(dāng)有客人來訪時(shí)筷资，客人需在樓門外的對(duì)講主機(jī)鍵盤上按出欲訪住戶的房間號(hào)挨这，呼叫欲訪住戶的對(duì)講分機(jī)。被訪住戶的主人通過對(duì)講設(shè)備與來訪者進(jìn)行雙向通話或可視通話胃宰，通過來訪者的聲音或圖像確認(rèn)來訪者的身份嘹冀。確認(rèn)可以允許來訪者進(jìn)入后，住戶的主人利用對(duì)講分機(jī)上的**按鍵录教，控制大樓入口門上的電控門鎖打開壮煎，來訪客人方可進(jìn)入樓內(nèi)。來訪客人進(jìn)入樓后字瘫，樓門自動(dòng)閉鎖触迄。
住宅小區(qū)物業(yè)管理的安全保衛(wèi)部門通過小區(qū)安全對(duì)講管理主機(jī)，可以對(duì)小區(qū)內(nèi)各住宅樓安全對(duì)講系統(tǒng)的工作情況進(jìn)行監(jiān)視借街。如有住宅樓入口門被非法打開惦参、安全對(duì)講主機(jī)或線路出現(xiàn)故障，小區(qū)安全對(duì)講管理主機(jī)會(huì)發(fā)出報(bào)警信號(hào)听想、顯示出報(bào)警的內(nèi)容及地點(diǎn)腥刹。小區(qū)物業(yè)管理部門與住戶或住戶與住戶之間可以用該系統(tǒng)相互進(jìn)行通話。如物業(yè)部門通知住戶交各種費(fèi)用汉买、住戶通知物業(yè)管理部門對(duì)住宅設(shè)施進(jìn)行維修衔峰、住戶在緊急情況下向小區(qū)的管理人員或鄰里報(bào)警求救等。
系統(tǒng)主要由主機(jī)蛙粘、分機(jī)垫卤、UPS電源、電控鎖出牧、穴肘、保護(hù)器、視頻放大器舔痕、信號(hào)中繼器评抚、訊號(hào)轉(zhuǎn)換器、視頻切換器伯复、主機(jī)選擇器慨代、網(wǎng)絡(luò)匯總器、集線器啸如、數(shù)字信號(hào)轉(zhuǎn)換器品昭、光端機(jī)和閉門器等組成。根據(jù)類型可分為直按式徽七、數(shù)碼式、數(shù)碼式戶戶通仙茴、直按式可視對(duì)講蛹柔、數(shù)碼式可視對(duì)講哑暮、數(shù)碼式戶戶通可視對(duì)講等。
門口機(jī)
門口機(jī)
主機(jī)
主機(jī)是可視門鈴系統(tǒng)的控制部分电尖，每一戶分機(jī)的傳輸信號(hào)以及電鎖控制信號(hào)等都通過主機(jī)的控制奕碑，它的電路板采用減振安裝，并進(jìn)行防潮處理勺帜，抗振防潮能力強(qiáng)脆号，并帶有夜間照明裝置，外形美觀晤哩、大方寝话。
分機(jī)
分機(jī)是一種對(duì)講話機(jī)，一般都是與主機(jī)進(jìn)行對(duì)講侈净，但現(xiàn)在的戶戶通可視門鈴系統(tǒng)則與主機(jī)配合成一套內(nèi)部電話系統(tǒng)可以完成系統(tǒng)內(nèi)個(gè)用戶的電話
室內(nèi)七寸分機(jī)
室內(nèi)七寸分機(jī)
聯(lián)系尊勿，使用更加方便，它分為可視分機(jī)畜侦，非可視分機(jī)元扔。具有電鎖控制功能和監(jiān)視功能，一般安裝在用戶家里的門口處旋膳，主要方便住戶與來訪者對(duì)講交談澎语。
UPS電源
它的功能主要是保持可視門鈴系統(tǒng)不掉電。正常情況下验懊，處于充電的狀態(tài)擅羞。當(dāng)停電的時(shí)候，UPS電源處于給系統(tǒng)供電的狀態(tài)÷成現(xiàn)在可視門鈴系統(tǒng)祟滴，廠家一般不配備UPS電池，主要是可視系統(tǒng)耗電太大歌溉，一般的小容量UPS電池保證不了使用時(shí)間垄懂！
、保護(hù)器痛垛、視頻放大器秋衡、信號(hào)中繼器
與保護(hù)器在總線制系統(tǒng)中使用，功能為呼叫信號(hào)提供尋址接通室內(nèi)機(jī)晚簇。保護(hù)器功能主要為戶內(nèi)線路短路提供隔離保護(hù)作用或提供部分線路信號(hào)處理功能挑卫。視頻放大器用于線路視頻信號(hào)處理以滿足視頻遠(yuǎn)距離傳輸時(shí)視頻質(zhì)量的要求，信號(hào)中繼器為總線控制信號(hào)遠(yuǎn)距離傳輸有衰減或干擾時(shí)選用食召。 為使用更方便可靠贩普，某些與保護(hù)器功能設(shè)計(jì)在一起，種類有多種付杰，不同系統(tǒng)或不同功能要求的工程可選擇不一樣的型號(hào)的研脸，典型系統(tǒng)按其功能主要有單路純解碼叨连、四路半隔離、四路隔離保護(hù)帶
視頻信號(hào)處理或怜、四路普通聯(lián)網(wǎng)矛唤、四路全隔離帶視頻處理聯(lián)網(wǎng)型及多路的多功能，當(dāng)系統(tǒng)需求較多附加功能的時(shí)归衫，如果只選擇普通怜腊，會(huì)影響系統(tǒng)性能，選用時(shí)可向廠家咨詢或查詢系統(tǒng)產(chǎn)品說明書蔫缸。
訊號(hào)轉(zhuǎn)換器腿准、視頻切換器
訊號(hào)轉(zhuǎn)換器用于非直接聯(lián)網(wǎng)主機(jī)的信號(hào)轉(zhuǎn)換為聯(lián)網(wǎng)信號(hào)的中間網(wǎng)絡(luò)設(shè)備，在某主機(jī)本身具備聯(lián)網(wǎng)線接口的情 況下捂龄，不需要專用的訊號(hào)轉(zhuǎn)換器產(chǎn)品释涛。視頻切換器用于個(gè)別系統(tǒng)聯(lián)網(wǎng)時(shí)將單元視頻信號(hào)切換至聯(lián)網(wǎng)總線視頻線上,以更好地提高聯(lián)網(wǎng)視頻信號(hào)的點(diǎn)對(duì)點(diǎn)傳輸質(zhì)量。
主機(jī)選擇器
若某樓道有多個(gè)出入口都需要安裝門口主機(jī)時(shí)倦沧，若所選擇的門口主機(jī)本身不帶多門口機(jī)并聯(lián)功能唇撬，則可通過此設(shè)備實(shí)現(xiàn)多個(gè)門口主機(jī)工作時(shí)的信號(hào)切換作用；若所選擇的門口主機(jī)本身帶有多門口機(jī)并聯(lián)功能展融，則本設(shè)備不需要使用窖认。
網(wǎng)絡(luò)匯總器、集線器告希、數(shù)字信號(hào)轉(zhuǎn)換器扑浸、光端機(jī)
大型小區(qū)聯(lián)網(wǎng)時(shí)，信號(hào)在傳輸中有衰減或受干擾燕偶，并且接線較多喝噪，通過此類設(shè)備，可大程度的還原失真的信號(hào)摆螟，以滿足遠(yuǎn)距離傳輸期第，個(gè)別模擬信號(hào)超遠(yuǎn)距離傳輸需用數(shù)字TCP/IP轉(zhuǎn)換器或光端機(jī)進(jìn)行傳輸，以達(dá)效果更佳蒜恶。
電鎖
品種很多舌必，常用的有電控鎖、磁力鎖车崔、靜音鎖巫紧、電機(jī)鎖等等。一般內(nèi)部結(jié)構(gòu)主要由電磁機(jī)構(gòu)組成述尊。用戶只要按下分機(jī)上的電鎖鍵能使電磁線圈通電痹对，從而使電磁機(jī)構(gòu)帶動(dòng)連桿動(dòng)作，能控制大門的打開漠哲。
閉門器
它是一種特殊的自動(dòng)閉門連桿機(jī)構(gòu)弦密。它具有調(diào)節(jié)器哗蛋，可以調(diào)節(jié)加速度和作用力度，使用方便园担、靈活。
軟件技術(shù)
大部分需要用到音視頻交互的可視門鈴系統(tǒng)都可以采用AnyChat 開發(fā)枯夜。AnyChat 內(nèi)部封裝了音視頻的采集弯汰、編碼、傳輸湖雹、解碼以及播放（顯示）功能咏闪，只需要幾個(gè)簡單的API調(diào)用，即可實(shí)現(xiàn)多個(gè)用戶之間的語音摔吏、視頻鸽嫂、文字交互，由于內(nèi)核已經(jīng)實(shí)現(xiàn)了P2P網(wǎng)絡(luò)征讲，所以上層應(yīng)用不需要關(guān)心復(fù)雜的網(wǎng)絡(luò)傳輸問題据某，簡化了上層應(yīng)用的開發(fā)難度，上層應(yīng)用的開發(fā)人員可以把更多的精力投入到業(yè)務(wù)流程诗箍、用戶體驗(yàn)等方面癣籽，實(shí)現(xiàn)應(yīng)用系統(tǒng)的快速開發(fā)。

 FragmentWelcome to consult...onderfully virtuous, I dare say—some
people contend for that, at least; and I am sure I don’t want to
contradict them—but they have not very fine natures, and they
may be thankful that, like their coarse rough skins, they are not
easily wounded.’

‘Really!’ said Miss Dartle. ‘Well, I don’t know, now, when I have
been better pleased than to hear that. It’s so consoling! It’s such a
delight to know that, when they suffer, they don’t feel! Sometimes
I have been quite uneasy for that sort of people; but now I shall
just dismiss the idea of them, altogether. Live and learn. I had my
doubts, I confess, but now they’re cleared up. I didn’t know, and
now I do know, and that shows the advantage of asking—don’t it?’

I believed that Steerforth had said what he had, in jest, or to
draw Miss Dartle out; and I expected him to say as much when she
was gone, and we two were sitting before the fire. But he merely
asked me what I thought of her.

‘She is very clever, is she not?’ I asked.

‘Clever! She brings everything to a grindstone,’ said Steerforth,
and sharpens it, as she has sharpened her own face and figure
these years past. She has worn herself away by constant
sharpening. She is all edge.’

Charles Dickens ElecBook Classics

f
David Copperfield

‘What a remarkable scar that is upon her lip!’ I said.

Steerforth’s face fell, and he paused a moment.

‘Why, the fact is,’ he returned, ‘I did that.’

‘By an unfortunate accident!’

‘No. I was a young boy, and she exasperated me, and I threw a
hammer at her. A promising young angel I must have been!’ I was
deeply sorry to have touched on such a painful theme, but that
was useless now.

‘She has borne the mark ever since, as you see,’ said Steerforth;
‘a(chǎn)nd she’ll bear it to her grave, if she ever rests in one—though I
can hardly believe she will ever rest anywhere. She was the
motherless child of a sort of cousin of my father’s. He died one day.
My mother, who was then a widow, brought her here to be
company to her. She has a couple of thousand pounds of her own,
and saves the interest of it every year, to add to the principal.
There’s the history of Miss Rosa Dartle for you.’

‘And I have no doubt she loves you like a brother?’ said I.

‘Humph!’ retorted Steerforth, looking at the fire. ‘Some
brothers are not loved over much; and some love—but help
yourself, Copperfield! We’ll drink the daisies of the field, in
compliment to you; and the lilies of the valley that toil not, neither
do they spin, in compliment to me—the more shame for me!’ A
moody smile that had overspread his features cleared off as he
said this merrily, and he was his own frank, winning self again.

I could not help glancing at the scar with a painful interest
when we went in to tea. It was not long before I observed that it
was the most susceptible part of her face, and that, when she
turned pale, that mark altered first, and became a dull, leadcoloured streak, lengthening out to its full extent, like a mark in

Charles Dickens ElecBook Classics

f
David Copperfield

invisible ink brought to the fire. There was a little altercation
between her and Steerforth about a cast of the dice at back
gammon—when I thought her, for one moment, in a storm of rage;
and then I saw it start forth like the old writing on the wall.

It was no matter of wonder to me to find Mrs. Steerforth
devoted to her son. She seemed to be able to speak or think about
nothing else. She showed me his picture as an infant, in a