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href="http://www.cdcfah.com/cp/third-snzmdjeh_tongdengwa/">筒燈</a>?北京戶外投光燈具批發(fā) 歡迎咨詢上海先盛照明電器供應(yīng)</p><div id="rp3sofl" class="leftbox clearfix"><h1>北京戶外投光燈具批發(fā) 歡迎咨詢上海先盛照明電器供應(yīng)</h1><div id="wa8zvwx" class="proBig"><div id="vy7n83j" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269782155068360/7868258.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ftk3i7n" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269782155068360/7868258.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ohir8e8" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>北京戶外投光燈具批發(fā),投光燈</p><p><span>***更新：</span>2021-01-24 01:10:06</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="gofb8xr" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海先盛照明電器有限公司</a></p><p><span>聯(lián)系人：</span>顧勇軍</p><p><span>郵箱: </span>522366548@qq.com</p><p><span>電話: </span>13301861712</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>021-54169416</p><p><span>地址: </span>陶干路1199號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ucdpbhi" class="page-proshow02"><p class="title">詳細說明</p><div id="qd3xbse" class="box"><p><p> 投光燈是指定被照面上的照度高于周圍環(huán)境的燈具。又稱聚光燈，北京戶外投光燈具批發(fā)。通常，它能夠瞄準任何方向，并具備不受氣候條件影響的結(jié)構(gòu)。主要用于大面積作業(yè)場礦、建筑物輪廓，北京戶外投光燈具批發(fā)、體育場、立交橋、紀念碑、公園和花壇等。因此，幾乎所有室外使用的大面積照明燈具都可看作投光燈。投光燈的出射光束角度有寬有窄，變化范圍在0°～180°之間，其中光束特別窄的稱為探照燈。投光燈由光學部件、機械部件和電氣部件3部分組成。光學部件主要是反射器和限制光線投光燈的遮光格片。機械部件主要是外殼，以及固定和調(diào)整光源位置的調(diào)焦機構(gòu)，北京戶外投光燈具批發(fā)，固定燈具的支架、基座和帶有角度指示的調(diào)整燈具光束投射方向的零件。對絕大部分為密閉式的投光燈，機械部件還有保護玻璃及各種密封圈。根據(jù)使用環(huán)境的需要，有的還帶有金屬網(wǎng)罩。性能良好的投光燈還配有空氣過濾器。電氣部件主要是鎮(zhèn)流器、電容器、觸發(fā)器（根據(jù)光源需要而設(shè)）等。廣泛應(yīng)用于各種室內(nèi)、戶外顯示屏，分為全色、三色和單色顯示屏，全國有100多個單位在開發(fā)生產(chǎn)。北京戶外投光燈具批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京戶外投光燈具批發(fā),投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269782155068360/7868258.png"></div><p style="text-indent:25px">土壤濕接地電阻較容易達到，秋冬季干燥土壤水分少，接地電阻就有可能超過規(guī)定數(shù)值，作記錄是為了保存原始數(shù)據(jù)，做到日后有據(jù)可查。符合ISO2000質(zhì)量管理體系。測試接地電阻可以自行設(shè)計表格，接地電阻測試封裝企業(yè)、LED應(yīng)用企業(yè)都要做，只要將各種設(shè)備名稱填于表格內(nèi)，測出各設(shè)備的接地電阻記錄在案，測試人簽名即可存檔。人體靜電對LED的損害也是很大的，工作時應(yīng)穿防靜電服裝，配帶靜電環(huán)，靜電環(huán)應(yīng)接地良好，有一種不須要接地的靜電環(huán)防靜電的效果不好北京戶外投光燈具批發(fā)衰減特性除與紅、綠、藍LED本身特性相關(guān)外，使用電流、PCB板散熱設(shè)計、顯示屏使用環(huán)境溫度等均對衰減影響。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京戶外投光燈具批發(fā),投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781071572266/5060107.png"></div><p style="text-indent:25px">下面將以某公司的這款太陽能LED大功率路燈為例，分幾個方面做分析。2.1太陽能電池組件選型設(shè)計要求:廣州地區(qū)，負載輸入電壓24V功耗34.5W，每天工作時數(shù)8.5h，保證連續(xù)陰雨天數(shù)7天。(I)廣州地區(qū)近二十年年均輻射量107.7Kcal/cm2，經(jīng)簡單計算廣州地區(qū)峰值日照時數(shù)約為3.424h;(2)負載日耗電量== 12.2AI)所需太陽能組件的總充電電流=1.05×12.2×÷（3.424×0.85）=5.9A在這里，兩個連續(xù)陰雨天數(shù)之間的設(shè)計zui短天數(shù)為20天，1.05為太陽能電池組件系統(tǒng)綜合損失系數(shù)，0.85為蓄電池充電效率。</p><p style="text-indent:25px">線性調(diào)節(jié)zui簡便的方法是在LED驅(qū)動控制C中使用外部SET電阻來實現(xiàn)LED的調(diào)光控制。雖然，這種調(diào)光控制方法有效，但卻缺乏靈活性，無法讓用戶改變光強度。線性調(diào)節(jié)則會降低效率，并引起白光LED朝向黃色光譜的色彩偏移。可能是輕微的偏移,但可在敏感應(yīng)用中檢測出。采用數(shù)字或叫PWM的LED調(diào)光控制法以大于100HZ的開關(guān)工作頻率，以脈寬調(diào)制的方法改變LED驅(qū)動電流的脈沖占空比來實理LED的調(diào)光控制，選用大于100HZ開關(guān)調(diào)光控制頻率主要是為了避免人眼感覺到調(diào)光閃爍現(xiàn)象，在LED的PWM調(diào)光控制下。<span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"></span></span></span></span></span></span></span></span>這種情況也容易造成LED燈珠使用一段時間后死燈。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京戶外投光燈具批發(fā),投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781652041016/5513893.png"></div><p style="text-indent:25px">由于銅材較貴，成本自然就高，受市場激烈竟爭因素影響，為了降**造成本，市場大多都采用冷軋低碳鋼帶來沖壓LED支架徘，鐵的支架排要經(jīng)過鍍銀，鍍銀有兩個作用，一是為了防止氧化生銹，二是方便焊接，支架排的電鍍質(zhì)量非常關(guān)鍵，它關(guān)系到LED的壽命，在電鍍前的處理應(yīng)嚴格按操作規(guī)程進行，除銹、除油、磷化等工序應(yīng)一絲不茍，電鍍時要控制好電流，鍍銀層厚度要控制好，鍍層太厚成本高，太薄影響質(zhì)量。電鍍時要控制好電流，鍍銀層厚度要控制好，鍍層太厚成本高，太薄影響質(zhì)量。檢查led燈珠的電流，查看led燈珠兩端的電流，是否超過Led燈珠的工作電流。遼寧批發(fā)投光燈具</p><p style="text-indent:25px">失效率：由于全彩顯示屏由上萬甚至幾十萬組紅、綠、藍三種LED組成的像素點組成。北京戶外投光燈具批發(fā)</p><p style="text-indent:25px">這些要求都為電子行業(yè)的人們所熟悉，關(guān)健是在實際執(zhí)行時是否到位，是否有記錄。據(jù)筆者了解一般的民營企業(yè)，防靜電措施做得并不到位，這就是大多數(shù)企業(yè)查不到接地電阻的測試記錄，即使做了接地電阻測試也是一年一次，或幾年一次，或有問題時檢查一下接地電阻，殊不知接地電阻測試這是一項很重要的工作，每年至少4次（每季度測試一次），一些要求高的地方，每月就要作一次接地電阻測試。土壤電阻會隨著季節(jié)的變化而不同，春夏天雨水多北京戶外投光燈具批發(fā)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2979409.html</p></div></div></div></div></div><div id="vtf78wn" class="page-right twoColRt"><div id="drizqmx" class="box01 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