【文章內(nèi)容簡介】 mps in each direction頻譜/ Spectrum: 半正弦/ Halfsine；　　持續(xù)時間/ Duration: 6ms；　　加速度/ Acceleration: 250m/s2 (Approximately 25g)；　　方向/ Direction: 6 faces；　　次數(shù)/ Number: 每個方向500次/ 500 bumps in each direction。手機的跌落測試Test specification Test name DROP TEST FOR UNPACKED APPARATUS Evaluate the shock resistance of an apparatus unpacked to resist a series of drop tests. 評估無包裝的儀器的耐震強度來進行一系列下落測試 1. STANDARD標(biāo)準(zhǔn) This test is according to the standard NFC 20 732 equivalent to the standard CEI 68232 此測試根據(jù)等同于標(biāo)準(zhǔn)cei68232的標(biāo)準(zhǔn)nfc20732。 2. PRINCIPLE原理 The test samples suffer 14 successive drops with different angles on a pinewood board. 測試樣品滿足14次連續(xù)不同角度下落在松木板上 3. DIRECTIONS FOR USE :使用方向 Test surface測試表面 Pinewood board of 5 cm thickness 5cm厚度的松木板 Dropping height下落高度 The height shall be measured from the part of the specimen nearest to the test surface, when the specimen is suspended prior to letting it fall. It’s m 當(dāng)樣品懸掛好時,下落高度應(yīng)從最靠近測試表面的樣品的部分來測試 Method of release釋放方法 The method of releasing the specimen shall be such as to allow free fall from the position of suspension, with a minimum of disturbance at the moment of release. 釋放樣品的方法應(yīng)是伴隨釋放時擾動的最小值,從懸掛處自由落體 Initial measurements首次測試 The specimen shall be visually examinated and electrically and mechanically checked. 樣品外觀要檢查,電力方面和機械方面也要檢查 Points to check : ? Switch on and off the mobile開關(guān)手機 ? All buttons/keys are ? Transaction with SIM card處理sim卡 ? Check that all the pixels are functional (Use the specified function of the software for this test. Example for BE1 and BE3, type 000000* then choose the function “checker”). 檢查所有像素[使用供測試用的專門軟間,比如be1,be3] ? Check the munication檢查通訊 Number of products minimum產(chǎn)品最小值 3 apparatus minimum must be During the test測試時 14 consecutive drop tests on all the faces as defined in the diagram : one on each face and corner while the apparatus is working. Even if the apparatus doesn’t fall on the face or corner desired, the drop isn’t done again. 所有表面上的14個連續(xù)下落測試如圖表中定義的:當(dāng)儀器在運轉(zhuǎn)中,下落也無須再做1次 The battery, unless a contrary request, must not be fixed with an external tool. 除非有相反的要求,否則電池組無須固定在外部工具上 Between each drop, the specimen shall be visually examinated and electrically and mechanically checked. 在每一次下落間, 樣品外觀要檢查,電力方面和機械方面也要檢查 Points to check : ? Switch on and off the mobile開關(guān)手機 ? All buttons/keys are ? Transaction with SIM card處理sim卡 ? Check that all the pixels are functional (Use the specified function of the software for this test. Example for BE1 and BE3, type 000000* then choose the function “checker”). 檢查所有像素[使用供測試用的專門軟間,比如be1,be3] ? Check the munication檢查通訊 4. JUDGEMENT判斷 The specimen shall be visually examinated and electrically and mechanically checked after each drop. 在每一次下落后,樣品外觀要檢查,電力方面和機械方面也要檢查 ? Checking performances of Possibility to switch on and off the mobile開關(guān)手機 Mobile stay switched on alone手機保持單獨打開 All buttons/keys are functioning. 所有的按鈕都要檢查是否能使用 Transaction with SIM card possible. 處理sim卡 Check that all the pixels are functional (Use the specified function of the software for this test. Example for BE1 and BE3, type 000000* then choose the function “checker”). 檢查所有像素[使用供測試用的專門軟間,比如be1,be3] Check that munication is ? Check the aspect of the equipment after the falling:在下落后,檢查儀器的每一方面 no injury can be caused due to ,無損壞被引起 damage due to casing must not affect interface with all the accessories still functional和所有附件的接口依然有功能。一． 塑料殼體（Housing）手機中殼體的作用：是整個手機的支承骨架；對電子元器件定位及固定；承載其他所有非殼體零部件并限位。殼體通常由工程塑料注塑成型。1．殼體常用材料（Material）ABS：高流動性，便宜，適用于對強度要求不太高的部件（不直接受到?jīng)_擊，不承受可靠性測試中結(jié)構(gòu)耐久性測試的部件），如手機內(nèi)部的支撐架(Keypad frame，LCD frame)等。還有就是普遍用在要電鍍的部件上（如按鈕，側(cè)鍵，導(dǎo)航鍵，電鍍裝飾件等）。目前常用奇美PA727，PA757等。PC+ABS：流動性好，強度不錯，價格適中。適用于絕大多數(shù)的手機外殼，只要結(jié)構(gòu)設(shè)計比較優(yōu)化，強度是有保障的。較常用 GE CYCOLOY C1200HF。POM：高強度，貴，流動性不好。適用于對強度要求較高的外殼（如翻蓋手機中與轉(zhuǎn)軸配合的兩個殼體，不帶標(biāo)準(zhǔn)滑軌模塊的滑蓋機中有滑軌和滑道的兩個殼體等，目前指定必須用PC材料）。較常用GE LEXAN EXL1414和Samsung HF1023IM。在材料的應(yīng)用上需要注意以下兩點：避免一味減少強度風(fēng)險，什么部件都用PC料而導(dǎo)致成型困難和成本增加；在對強度沒有完全把握的情況下，模具評