EIA-364-28E 電子連接器振動測試方法-中英

standspecifiedseveritiesofvibration.件承受特定強度振動的能力。uencyrangesandmagnitudesthatmaybeencounteredduringthelifeoftheconnector.振動幅度的環(huán)境，以此驗證對產品性能的影響情況.catesapictorialviewoftheaxisdefinitions.Thereferencingdocumentshallindicatethefixturingrequiredortheaxisdefini軸向與圖1不同，則在相關參考文件中需對試驗裝置要求及軸向進行定義。對于具有對稱性，方形及不規(guī)則的連接andgeographiclatitude.evibrationsystemconsistingofthevibrationmachine,togetherwithitsauxiliarytestequipment,shallbecapabl設備，整個系統(tǒng)應能產生正弦或隨機振動。mplitudedistribution,exceptthattheaccelerationmagnitudesofthepeakvaluesmaybelimitedtoaminimumofthree可限mblyofthesample.Ifnormalconnectormatingisdependentuponforcesexternaltotheconnector,thensuchforcesan器的連接方式需要依靠外力，那么這些外力與連接方式應盡可能模擬實際的狀況(例如：印刷電路連接器)。若是etestfixtureshallbedesignedsothatresonantvibrationinherentinthefixturewithinthefrequencyrangespeciflyaspossiblethenormalmountingofthespecimen.Aminimumof200mm(approx8in)ofwireorcableshallbeunsupporteonthemountingfixtureintheproximityofthesupportpointsofthespecimen.共振頻率在試驗所規(guī)定的頻率范圍內達到最小。在試驗夾具上接近樣品的地方監(jiān)控所施加的振動強度。樣品安裝應點的地方監(jiān)控振動輸入。oftheappliedvibrationmotionshallbespecifiedinoneormoredirections.Iftheorderofapplicationofthediffereimensions,thematerials,temper,etc.,asapplicable.方向。如果朝不同方向施加的次序很重要，那就應該規(guī)定不同方向的先后順序。對于進行試驗所要求的任何特殊試liamperes,maximumforallcontacts.eaterdurationareallowed.Adetectorcapableofdetectingthespecifieddiscontinuityshallbeused.于aximumamplitudemorethantwicethatofthesupportpoints.Whenspecified,resonantfrequenciesshallbedeterminedeitherbymonit的振幅的2倍還要大.當有規(guī)定時,共振頻率應采用監(jiān)控參數(shù)的方法,或采用共振檢測儀的方法來確定共振頻率。ubleamplitude(maximumtotalexcursion),thefrequencybeingvarieduniformlybetweentheapproximatelimitsof10Hzand55Hz.Tlardirections(totalof6hours).Ifapplicable,thistestshallbemadeunderelectricalloadconditions.內(從10至55,再從55至10)約歷時1分鐘.除非另有規(guī)定,在相互垂直的三個方法上各振動2小時(總共6小時).如果適用,振othevibrationamplitude,frequencyrange,anddurationspecifiedandandrespectively;seefigures2and3.間的振動，見圖2和圖30.06in)doubleamplitude(maximumtotalexcursion)or98.1m/s2(10gn)peak,whicheverisless.Thetoleranceonvibrationamplitude振幅的容許誤差為±10%.500Hz(seeexceptthattheprocedure(seeofthisstandardmaybeappliedduringthe10Hzto55Hzbandofthevibrationfrequencyrange.定的程序進行.ycleshallbeperformed12timesineachofthreemutuallyperpendiculardirections(totalof36times),sothatthemotionshallbeappliedfingtothenextband.Whentheprocedure(seeisusedforthe10Hzto55Hzband,thedurationofthisportionshallbesameasthedurationfor環(huán)12次(總共36次),因此整個試驗過程歷時9小時.只要能滿足振動頻率及速度的變化和總的試驗時間要求,就允許試驗一個方向約1.33小時).othevibrationamplitude,frequencyrange,anddurationspecifiedinrespectively;seefigures2and3..振幅的容許誤差為±10%.。000Hz(seeexceptthattheprocedure(seeofthisstandardmaybeappliedduringthe10Hzto55Hzbandofthevibrationfrequencyrange.定的程序進行。scycleshallbeperformed12timesineachofthreemutuallyperpendiculardirections(totalof36times),sothatthemotionshallbeappliedgoingtothenextband.Whentheprocedure(seeofthisstandardisusedforthe10Hzto55Hzband,thedurationofthisportionshallbethesa各循環(huán)12次(總共36次),因此整個試驗過程歷時12小時.只要能滿足振動頻率及速度變化和總的試驗時間要求，就允許垂直的每一個方向約1.33小時)。othevibrationamplitude,frequencyrange,anddurationspecifiedinandrespectively;seefigures2and3.0.06in)doubleamplitude(maximumtotalexcursion)or196.1m/s2(20gn)peak,whicheverisless.Thetoleranceonvibrationamplitud.振幅的容許誤差為±10%。定的程序進行。scycleshallbeperformed12timesineachofthreemutuallyperpendiculardirections(totalof36times),sothatthemotionshallbeapplie上變化和總的試驗時間要求，就允許試驗間斷進行。eprocedure(seeofthisstandardisusedforthe10Hzto55Hzband,thedurationofthisportionshallbethesameasthedurationforthisbandu程序進行振動時，這一頻段持續(xù)的時間與采用對數(shù)循環(huán)的時間相同(在三個互相垂直的每一個方向約1.33小時)。aximumfrequencytotheminimumfrequencyineachbandshallbenotlessthantwo(2).比不小于2。eapproximatelyequal.videdintothreebands,55Hzto125Hz,125Hzto500Hzand500Hzto2,000Hz,inaccordancewithForeachband,lettheconstant,:ntheratesofchangeforthethreebandswillbel25k,500kand2,000k,respectively.Thetimes(inminutes)totraversethethreefrequperminute,34.2Hzperminuteand137Hzperminute,respectively.Theminimumtimesoftraverseofthebandsare8.2min,10.9minand頻段,令頻率的變化率與該段頻段的最高頻率之比值為k,則三個頻段的頻率變化率分別為125k、500k及2000k，各頻頻率變化率分別為8.55Hz/分鐘、34.2Hz/分鐘和137Hz/分鐘，經過三個頻段的時間分別為8.2分鐘、10.9分鐘和10.equency;seeThespectral-densityvaluesshallbewithin+40%and-30%(±l.5dB)ofthespecifiedvaluesbetweenalower-specifiedfrwidthwillbeamaximumofl/3-octaveorafrequencyof25Hz,whicheverisgreater.z之間時，頻譜密度的值應介于規(guī)定值的+40%和-30%以內(±1.5dB)?頻率位于1000Hz與上限頻率(2000Hz)之間時，；unit-filterbandwidth.Forthisapplicationitisexpressedasg2/f,whereg2/fisthemean-h.Thespectraldensitycurvesareusuallyplottedeitheronalogarithmicscale,orinunitsofdecibels(dB).Thenumberofdecibelsisdefine.濾波器帶寬的每一次循環(huán)周期中所通過的以重力單位表示的加速度均方值.頻譜密度曲線通常以對數(shù)坐標或以分貝為f)，gr2/f為給定的參考頻譜密度，通常為所給定的最大值。1curve.Theexperimentally-obtainedcurveshallnotdifferfromthegaussiancurvebymorethan±l0%ofthemaximumvalue.斯分布曲線相差最大不得超過±10%。nrequiredinthereferencingdocument,thespecimenmaybemonitoredduringthetest.Thedetailsofthemonitoringcircuit,includingth連接試驗樣品的方法及連接點等。sthatareasnearaspracticabletothetestitemmountingpoints.Whenthevibrationinputismeasuredatmorethanonepoint,theminimumemaybeanaverageoftheaveragemagnitudesofthreeormoreinputs.Accelerationsinthetransversedirection,measuredatthetestitem點。當在一個以上的點測量振動輸入時，應使最小的振動輸入符合試驗曲線的規(guī)定(見圖4和圖5)。對于大重量的0%以內，同時應規(guī)定試驗點的位置和數(shù)量。ingequipmentattached,ifapplicable,inaccordancewithThevibrationmachineshallthenbeoperatedandequalizedorcompensatedtotothevibrationspecifiedbythetestconditionletter(seetables2,3and4)forthedurationasspecified:Ineachofthreemutuallyperpendic嘰，以便傳遞規(guī)定的振動頻率和強度(條件V或VI或VII,見圖4或圖5或圖6)。最后將試驗樣品按規(guī)定的時間和方向承onitoredduringthetest,thedetailsshallbeinaccordancewith按的規(guī)定。lliamperesforallcontacts.s的斷路現(xiàn)象。aterduratio