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電子產(chǎn)品的可靠性試驗

更新時間:2011-10-04      點擊次數(shù):1715

 

為了評價分析電子產(chǎn)品可靠性而進行的試驗稱為可靠性試驗。試驗?zāi)康耐ǔS腥缦聨追矫妫?/span>
 
1. 在研制階段用以暴露試制產(chǎn)品各方面的缺陷,評價產(chǎn)品可靠性達到預(yù)定指標(biāo)的情況;
 
2. 生產(chǎn)階段為監(jiān)控生產(chǎn)過程提供信息;
 
3. 對定型產(chǎn)品進行可靠性鑒定或驗收;
 
4. 暴露和分析產(chǎn)品在不同環(huán)境和應(yīng)力條件下的失效規(guī)律及有關(guān)的失效模式和失效機理;
 
5. 為改進產(chǎn)品可靠性,制定和改進可靠性試驗方案,為用戶選用產(chǎn)品提供依據(jù)。
 
對于不同的產(chǎn)品,為了達到不同的目的,可以選擇不同的可靠性試驗方法??煽啃栽囼炗卸喾N分類方法.
 
1. 如以環(huán)境條件來劃分,可分為包括各種應(yīng)力條件下的模擬試驗和現(xiàn)場試驗;
 
2. 以試驗項目劃分,可分為環(huán)境試驗、壽命試驗、加速試驗和各種特殊試驗;
 
3. 若按試驗?zāi)康膩韯澐?,則可分為篩選試驗、鑒定試驗和驗收試驗;
 
4. 若按試驗性質(zhì)來劃分,也可分為破壞性試驗和非破壞性試驗兩大類。
 
5. 但通常慣用的分類法,是把它歸納為五大類:
 
A. 環(huán)境試驗
 
B. 壽命試驗
 
C. 篩選試驗
 
D. 現(xiàn)場使用試驗
 
E. 鑒定試驗
 
1. 環(huán)境試驗是考核產(chǎn)品在各種環(huán)境振動、沖擊、離心、溫度、熱沖擊、潮熱、鹽霧、低氣壓等條件下的適應(yīng)能力,是評價產(chǎn)品可靠性的重要試驗方法之一。
 
2. 壽命試驗是研究產(chǎn)品壽命特征的方法,這種方法可在實驗室模擬各種使用條件來進行。壽命試驗是可靠性試驗中zui重要zui基本的項目之一,它是將產(chǎn)品放在特定的試驗條件下考察其失效損壞隨時間變化規(guī)律。通過壽命試驗,可以了解產(chǎn)品的壽命特征、失效規(guī)律、失效

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