Ib, Kev hem thawj ntawm kev co ib puag ncig rau ntsuas LCD: Tsim cov kev xav tau los ntawm cov teeb meem tsis ua haujlwm
1. Kev sib tw vibration hauv kev lag luam scenarios
Hauv cov khoom hnyav -cov khoom siv xws li CNC tshuab cov cuab yeej thiab cov tshuab txhaj tshuaj molding, qhov kev vibration zaus tsim los ntawm kev ua haujlwm ntawm lub cev muaj zog thiab cov khoom siv sib txuas tuaj yeem ncav cuag 10-2000Hz, nrog lub amplitude ntau tshaj 0.5mm. Cov ntaub ntawv tshawb fawb los ntawm qee qhov chaw tsim khoom tsheb qhia tau hais tias LCD cov cuab yeej tsis muaj kev kho mob poob siab muaj teeb meem xws li cov duab tsis pom tseeb thiab pixel tsis zoo tom qab ua haujlwm tas li rau 3 lub hlis, nrog rau qhov tsis ua tiav txog li 15%. Kev soj ntsuam ntxiv tau qhia tias kev vibration ua rau qaug zog tawg ntawm cov pob qij txha ntawm lub LCD iav substrate thiab lub voj voog tsav tsheb yog qhov ua rau tsis ua haujlwm.
2. Kev sim siab heev hauv lub tsheb ib puag ncig
Lub tsheb ntsuas vaj huam sib luag LCD yuav tsum tiv thaiv lub cav vibration (50-500Hz), txoj kev cuam tshuam (kev nrawm nrawm mus txog 50g), thiab kub hloov pauv (-40℃txog 85℃). Raws li kev sim cov ntaub ntawv los ntawm cov chaw tsim khoom tsheb hybrid, 60% ntawm LCDs nyob rau hauv cov qauv uas tsis muaj kev poob siab-absorbing tsim tau ntsib teeb meem xws li backlight module detachment thiab disordered LCD molecule kev npaj thaum lub sij hawm bumpy txoj kev ntsuam xyuas, ncaj qha ua rau cuam tshuam ntawm kev tsav tsheb cov ntaub ntawv zaub.
3. Cov kev cai nruj hauv kev lag luam aerospace
Kev co ib puag ncig ntawm satellites, foob pob hluav taws thiab lwm lub dav hlau yog qhov nyuaj, yuav tsum muaj ntau yam kev sim xws li kev co random (lub zog spectral ntom txog 0.1g ² / Hz), sinusoidal kev co (10-2000Hz) thiab poob siab (10000g / 11ms) kom tau ntsib ib txhij. Kev coj ua ntawm qee qhov chaw xa khoom hauv LCD qhia tau hais tias dhau los ntawm peb-theem kev poob siab absorbing system (hlau caij nplooj ntoos hlav + roj hmab ncoo + damping kua), qhov kev vibration kis tau tus nqi yuav raug txo kom qis dua 5%, kom ntseeg tau tias kev ncaj ncees tus nqi ntawm cov zaub module tshaj 99.9% thaum lub sij hawm tso tawm.
2, Lub cev mechanism ntawm kev co tsis ua hauj lwm: ib qho kev sib txuas ntawm cov khoom siv rau cov qauv
1. Kev puas tsuaj ncaj qha los ntawm kev puas tsuaj
Solder joint fatigue: Kev vibration ua rau muaj kev ntxhov siab nyob rau hauv SMT solder pob qij txha ntawm LCD thiab PCB. Thaum qhov kev ntxhov siab amplitude dhau qhov kev qaug zog, cov kab nrib pleb tshwm thiab nthuav tawm hauv cov pob qij txha, thaum kawg ua rau kev tawg.
Cov iav tawg: Qhov cuam tshuam ntawm LCD iav substrates yog txwv, thiab thaum lub zog vibration tshaj nws cov nqi tseem ceeb (feem ntau 10J / m ²), lub iav yuav tawg lossis tawg.
Polarizing zaj duab xis tev tawm: Lub zog shear los ntawm kev co yuav ua rau tsis ua hauj lwm ntawm cov nplaum txheej ntawm cov zaj duab xis polarizing thiab iav substrate, uas ua rau txo qis hauv cov duab sib piv.
2. Kev cuam tshuam tsis ncaj rau hluav taws xob ua haujlwm
Kev sib cuag tsis zoo: Kev vibration ua rau muaj kev hloov pauv hauv kev sib cuag ntawm FPC connector thiab LCD kub ntiv tes, ua rau muaj teeb meem cuam tshuam los yog suab nrov cuam tshuam.
Kev tsav tsheb tsis zoo: Kev vibration tuaj yeem hloov pauv qhov pib sib dhos lub kaum sab xis ntawm cov kua siv lead ua kua molecules, ua rau muaj kev cuam tshuam ntawm cov zaub grey lossis xim hloov.
Backlight malfunction: Lub vibration ntawm LED backlight modules tau yooj yim ua rau muaj teeb meem xws li solder sib koom detachment thiab lub teeb qhia phaj hloov, ua rau lub teeb tsis sib xws los yog lub zos dub cov ntxaij vab tshaus.
3, Cov txheej txheem kev daws teeb meem rau av qeeg resistant tsim: los ntawm passive mus rau active tiv thaiv system
1. Structureal shock absorption: cais cov kev vibration kis tau tus mob
Hlau caij nplooj ntoos hlav poob siab absorbs: Absorbs tsawg- zaus vibration zog los ntawm elastic deformation ntawm lub caij nplooj ntoos hlav, haum rau 10-100Hz zaus band. Ib lub chaw tsim khoom lag luam siv cov khoom siv stainless hlau spiral springs kom txo tau qhov kev vibration kis ntawm 80% mus rau 30%.
Rubber rho tawm pad: Siv lub siab damping yam ntxwv ntawm roj hmab kom attenuate siab - zaus vibrations (100-2000Hz), cov ntaub ntawv uas muaj xws li silicone roj hmab, nitrile roj hmab, thiab lwm yam. Ib tug tej yam automotive instrument tsum txhim kho qhov kev co acceleration attenuation tus nqi los ntawm 40% los ntawm optimizing cov roj hmab hardness 5 60 (Shore).
damping kua damping: Sau lub damping chamber nrog silicone roj los yog lwm yam damping kua kom dissipate vibration zog los ntawm cov viscous tsis kam ntawm cov kua. Lub LCD ntawm ib lub dav hlau txais yuav ib tug dual kab noj hniav damping qauv, uas ncua lub sij hawm cuam tshuam los ntawm 5ms mus rau 20ms thiab txo lub ncov acceleration los ntawm 75%.
2. Cov khoom siv ntxiv dag zog: Txhim kho qhov muaj peev xwm tiv thaiv kev co ntawm cov khoom
Iav substrate reinforcement: siv cov tshuaj muaj zog iav (xws li Corning Gorilla Glass), nws qhov kev nyuaj siab saum npoo tuaj yeem ncav cuag 900MPa, thiab nws lub zog cuam tshuam tau nce 3-5 zaug.
Kev tiv thaiv kev sib koom ua ke: Txheej txheej ntawm SMT solder pob qij txha nrog peb cov pov thawj xim (xws li acrylic ester) tuaj yeem tsim cov txheej txheem tiv thaiv nrog lub thickness ntawm 0.1-0.3mm, zoo tiv thaiv kev nthuav tawm ntawm kev sib koom ua ke tawg.
FPC qhov cuab lub zog: Los ntawm kev siv daim hlau reinforcement (xws li PI zaj duab xis) kom muaj zog ntawm FPC connectors, khoov deformation los ntawm kev co tuaj yeem tiv thaiv tau. Kev coj ua ntawm qee qhov chaw tsim khoom siv kho mob qhia tau hais tias lub phaj txhawb nqa tuaj yeem txo qhov kev hloov pauv ntawm kev sib cuag los ntawm ± 50m Ω txog ± 10m Ω.
3. Active tswj: Lub sijhawm tshem tawm ntawm kev cuam tshuam kev co
Piezoelectric ceramic tsav: Nruab piezoelectric ceramic daim hlau nyob rau sab nraum qab ntawm LCD kom tiv thaiv sab nraud excitation los ntawm kev co rov qab. Lub siab - cov chaw tsim khoom siv ntsuas qhov tseeb tau txais kev kaw- lub voj voog tswj cov txheej txheem kom txo qis kev vibration them qeeb los ntawm tsawg dua 1ms thiab txhim kho qhov tseeb qhov tseeb ntawm 90%.
Electromagnetic actuator: siv lub zog electromagnetic los tsim kom muaj kev hloov pauv hauv qhov sib txawv ntawm kev vibration, haum rau qhov tsawg- zaus thiab loj amplitude scenarios. Lub hauv paus shockproof ntawm cov khoom siv hluav taws xob semiconductor txo qhov kev vibration acceleration ntawm lub tshuab raug los ntawm 0.5g rau 0.05g los ntawm electromagnetic drive.
4, Kev Lag Luam Kev Ua Lag Luam thiab Cov Qauv Qhia Tshwj Xeeb: Seismic Tsim los ntawm Cov Txheej Txheem rau Cov Txheej Txheem
1. Seismic qauv rau automotive electronics
TS EN ISO 16750-3: Kev ntsuas kev vibration rau cov khoom siv hluav taws xob hauv onboard, suav nrog kev vibration sinusoidal (5-2000Hz), random vibration (lub zog spectral ntom 0.02-0.2g ² / Hz), thiab cuam tshuam (50g / 11ms).
SAE J2380: Rau kev vibration kev ntsuam xyuas ntawm lub tsheb fais fab roj teeb tswj cov tshuab, nws yuav tsum ua kom tiav 1000 teev durability test nyob rau hauv qhov kub ntawm -40℃mus rau 85 degree.
2. Seismic tsim rooj plaub ntawm kev lag luam twj
Siemens S7-1200 PLC: Los ntawm kev sib txuas cov hlau casing nrog cov roj hmab pads, qhov kev vibration kis tau tus nqi raug txo los ntawm 70% mus rau 20%, ua tau raws li IEC 60068-2-64 tus qauv.
Omron NJ series maub los: txais yuav ob - txheej PCB qauv thiab txheej txheem encapsulation, lub neej qaug zog ntawm cov pob qij txha tau nce los ntawm 10 ⁵ zaug rau 10 ⁷ zaug, tau lees paub los ntawm MIL-STD-810G tus qauv tub rog.
3. Seismic innovation nyob rau hauv aerospace teb
SpaceX Dragon spacecraft instrument: Siv peb lub-theem shock absorbing system (hlau springs, roj hmab pads, thiab magnetorheological kua), lub vibration acceleration thaum lub sij hawm launching theem yog txo los ntawm 10g mus rau 1g, kom ruaj ntseg ntawm lub astronaut interface.
Beidou satellite navigation davhlau ya nyob twg: siv cov duab nco alloy (SMA) poob siab absorbers, siv nws cov khoom elastic super kom nqus tau lub zog vibration, ua rau muaj qhov yuam kev ntawm qhov tsawg dua 0.1m.
