Miniaturized Quartz Accelerometer

Qhov Miniaturized Quartz Accelerometer no yog lub siab -kev ua tau zoo tus qauv vibration sensor, tshwj xeeb yog tsim los ua ib qho me me, siab - kub- tiv taus, thiab tiv thaiv - seismic accelerometer. Tsim los ua kom tau raws li cov kev xav tau nruj ntawm kev lag luam thiab kev tsim vaj tsev, cov khoom no khav theeb tshwj xeeb kev ua tau zoo, suav nrog kev rov ua tau zoo, txhim khu kev qha pib ua haujlwm, siab dua - qhov kub thiab txias, muaj zog tiv thaiv - seismic muaj peev xwm, thiab ntev - lub sijhawm ua haujlwm kev ntseeg siab. Nws cov qauv tsim muaj ntau yam ua rau daim ntawv thov seamless nyob rau hauv ob qho tib si acceleration testing thiab dynamic vibration ntsuas, ua rau nws muaj ntau yam thiab indispensable sensing tivthaiv nyob rau hauv ntau yam teb.

Dab tsi teeb tsa miniaturized quartz accelerometer yog nws qhov tshwj xeeb kev sib xyaw tsim, uas ua rau peb qhov zoo: miniaturization, siab -kub tsis kam, thiab kev co kuj. Txhawm rau ua kom pom kev ua haujlwm zoo nyob rau hauv cov xwm txheej hnyav, cov khoom lag luam tau txais cov cuab yeej ntim khoom ntim siab tshaj plaws thiab kev cai -tsim kev siv hluav taws xob hluav taws xob- cov khoom siv no ua haujlwm tandem los txhim kho cov qauv kev ruaj ntseg, txo cov kev cuam tshuam sab nraud, thiab xyuas kom muaj kev ua tau zoo ib yam txawm tias nyob rau hauv qhov chaw huab cua. Cov khoom tsim tawm tam sim no tswj hwm kev sib raug zoo nrog cov tswv yim acceleration, muab cov teeb liab ruaj khov thiab cov kab hluav taws xob uas ua rau lub hauv paus rau siab - ntsuas qhov tseeb.

Rau cov neeg siv nrhiav kev txiav txim siab, qhov accelerometer no muaj kev ua haujlwm hloov tau yooj yim: los ntawm kev xam thiab xaiv cov qauv tsim nyog, cov neeg siv tau yooj yim ua tiav siab - cov khoom tso tawm kom pom tseeb uas ua raws li lawv cov kev ntsuas tshwj xeeb, tshem tawm qhov xav tau rau kev sib tw thib ob thiab kev txhim kho kev sim. Tsis tas li ntawd, txhawm rau txhawm rau txhim kho kev ntsuas qhov tseeb hauv ib puag ncig nrog qhov kub thiab txias, cov khoom txhawb nqa kev sib koom ua ke ntawm ib qho ua tau - nyob rau hauv qhov kub thiab txias sensor raws li tus neeg siv thov. Qhov kev xaiv qhov ntsuas kub no ua lub luag haujlwm tseem ceeb hauv kev tsis ncaj ncees thiab qhov ntsuas qhov cuam tshuam, txo qhov cuam tshuam ntawm kev hloov pauv ntawm qhov ntsuas kub ntawm qhov ntsuas thiab ua kom muaj qhov tseeb zoo ib yam thoob plaws qhov kub thiab txias.

Cov khoom lag luam sib xyaw ua ke tus qauv tsim tshwj xeeb nyob rau hauv miniaturization, siab -kub tsis kam, thiab kev vibration tsis kam, ua tiav los ntawm kev ntim khoom siab tshaj plaws thiab kev cai- tsim cov khoom siv hluav taws xob. Qhov kev tsim qauv sib xyaw ua ke no txhim kho cov qauv kev ruaj ntseg, txo kev cuam tshuam los ntawm qhov chaw qis qis (xws li kev kub siab, corrosive media, thiab electromagnetic cuam tshuam), thiab ua kom muaj kev ua tau zoo nyob rau hauv cov xwm txheej huab cua. Nyob rau hauv cov nqe lus ntawm kev ua hauj lwm hauv paus ntsiab lus, cov khoom tso zis tam sim no tswj ib tug nruj proportional kev sib raug zoo nrog cov input acceleration, muab ib tug ruaj khov thiab linear sensing teeb liab uas lays lub hauv paus rau siab - precision ntsuas. Cov neeg siv tuaj yeem ua tiav qhov siab - cov zis tawm los ntawm kev suav thiab xaiv cov qauv tsim nyog, uas ua kom yooj yim rau ntawm - qhov chaw ua haujlwm thiab txo qhov kev xav tau ntawm kev sib tw theem nrab. Tsis tas li ntawd, ib qho ua tau - nyob rau hauv qhov kub thiab txias sensor tuaj yeem ua ke raws li tus neeg siv kev thov, uas yog siv rau qhov tiag -lub sij hawm kev tsis ncaj ncees thiab qhov ntsuas qhov nyiaj them poob haujlwm- qhov kev ua haujlwm no tseem ceeb tshwj xeeb hauv cov roj drilling, vim nws txo qis qhov cuam tshuam ntawm qhov kub thiab txias ambient kub hloov pauv ntawm kev ntsuas cov ntaub ntawv raug, tawm kev ua haujlwm txawm tias muaj kev ntseeg siab.

1. Miniaturized Micro Structure Tsim

Kev siv cov qauv tsim micro sib xyaw ua ke, lub accelerometer ua tiav ib qho ultra- lub teeb qhia me me nrog qhov hnyav tsawg dua lossis sib npaug li 25 grams. Qhov no compact thiab lub teeb yuag tsim yog paub los ntawm precision micro-machining technology thiab optimized structural layout, uas tsis tsuas yog zoo txo ​​lub zuag qhia tag nrho ntim thiab hnyav ntawm cov khoom, tab sis kuj xyuas kom meej lub rigidity thiab stability ntawm lub sensor. Cov yam ntxwv me me ua rau nws tsim nyog rau kev teeb tsa hauv qhov chaw- txwv tsis pub siv cov xwm txheej, xws li lub qhov rooj laum dab tshos, me me - cov khoom siv loj, thiab cov cuab yeej ntsuas qhov tseeb, tsis cuam tshuam nrog kev ua haujlwm ib txwm muaj ntawm cov khoom siv tswv tsev, thaum ua kom yooj yim xa mus thiab kev koom ua ke.

2. Cov yam ntxwv kub zoo heev

Cov khoom lag luam boasts cov yam ntxwv kub zoo heev, nrog kev ua haujlwm ruaj khov tswj raws li tag nrho - qhov ntsuas kub ntsuas tus nqi. Kev cia siab rau qhov kev ruaj ntseg ntawm qhov kub thiab txias ntawm siab - purity quartz siv lead ua thiab cov cuab yeej kub siab tshaj plaws, nws tuaj yeem cuam tshuam qhov cuam tshuam ntawm qhov kub thiab txias ntawm qhov ntsuas qhov tseeb. Txawm hais tias nyob rau hauv qis - kub lossis siab - qhov kub thiab txias ib puag ncig, qhov ntsuas qhov ntsuas qhov tsis zoo, qhov ntsuas qhov ntsuas, thiab lwm yam ntsuas kev ua haujlwm tseem ceeb nyob ruaj khov, ua kom muaj txiaj ntsig zoo ib yam ntawm txhua qhov kev ua haujlwm kub. Cov yam ntxwv no tshwj xeeb yog qhov tseem ceeb rau cov ntawv thov hauv qhov kub thiab txias ib puag ncig, zam kev ntsuas qhov yuam kev tshwm sim los ntawm qhov kub thiab txias thiab tso lub hauv paus rau siab -cov ntaub ntawv raug sau.

3. Zoo tshaj Environmental Adaptability & Flexible Output Options

Nws muaj kev hloov pauv zoo ib puag ncig, muaj peev xwm ua haujlwm ruaj khov hauv ib puag ncig hnyav xws li kev kub siab, muaj zog vibration, electromagnetic cuam tshuam, thiab corrosive media. Lub rugged ntim tsim thiab tiv thaiv - cov qauv cuam tshuam zoo cais cov kev cuam tshuam sab nraud, kom ntseeg tau tias kev ua tau zoo hauv kev ua haujlwm nyuaj. Nyob rau tib lub sijhawm, cov khoom lag luam muab cov kev xaiv tso zis hloov pauv kom tau raws li cov neeg siv khoom xav tau: xaiv qhov kub thiab txias tso zis muaj peev xwm paub tau tiag tiag- lub sijhawm ntsuas kub thiab cov lus tawm tswv yim, ua kom yooj yim rau kev them nyiaj kub tom qab thiab kho cov ntaub ntawv; Optional analog tso zis hom yog sib xws nrog ntau yam ntaub ntawv tau los systems, enabling seamless kev twb kev txuas nrog ntau hom ntawm hosting khoom thiab kev txhim kho cov versatility thiab applicability ntawm cov khoom.

4. Zero Frequency DC teb & Muaj zog tiv thaiv -Kev cuam tshuam muaj peev xwm

Nruab nrog xoom zaus DC teb muaj peev xwm, lub accelerometer tuaj yeem ntsuas qhov nrawm nrawm thiab lub zog dynamic vibration, tsis muaj qhov muag tsis pom hauv qhov ntsuas ntau zaus. Qhov no tso cai rau nws hloov mus rau ob qho tib si kev ntsuas tus cwj pwm zoo li qub (xws li laum txoj hlua tus cwj pwm nrhiav pom hauv cov roj drilling) thiab kev soj ntsuam kev vibration dynamic (xws li cov cuab yeej kev vibration detection), paub txog dual -kev ntsuas qhov zoo li qub thiab lub xeev dynamic. Ntxiv rau, cov khoom siv tam sim no tso zis hom, uas muaj zog tiv thaiv - muaj peev xwm cuam tshuam piv nrog cov zis hluav taws xob. Nws tuaj yeem tiv thaiv kev cuam tshuam ntawm electromagnetic cuam tshuam, teeb liab attenuation, thiab lub suab nrov sab nraud nyob rau hauv ib puag ncig nyuaj, kom ntseeg tau tias cov teeb liab tso zis ruaj khov thiab txhim khu kev qha, thiab cov ntaub ntawv ntsuas yog qhov tseeb thiab muaj tseeb.

5. Kev ua tau zoo tshaj plaws: Kev kub siab ua haujlwm siab, tiv thaiv -Seismic, Tsis tshua muaj suab nrov & siab daws teeb meem

Lub accelerometer integrates ntau yam superior kev ua tau zoo, kev txhim kho nws adaptability thiab ntsuas zoo:

- Kev Tiv Thaiv Kub Kub: Nrog zoo heev - qhov kub thiab txias tsis kam, nws tuaj yeem tswj kev ua haujlwm ruaj khov nyob rau hauv qhov kub siab tshaj - qhov kub thiab txias, sib piv cov kev khiav hauj lwm kub ntau, thiab zam kev ua hauj lwm degradation los yog tsis ua hauj lwm los ntawm kub kub.

- Los tiv thaiv-Seismic Performance: Lub zog txhawb kev poob siab-absorbing qauv thiab rugged tsim pab kom nws tuaj yeem tiv taus kev co tsis tu ncua thiab cuam tshuam tam sim ntawd, ua kom cov zis ruaj khov txawm tias nyob rau hauv siab -kev co scenarios xws li laum me ntsis pob zeb tawg hauv roj drilling.

- Tsis tshua muaj suab nrov: Txais siab -precision quartz sensing cov ntsiab lus thiab suab nrov txo Circuit Court tsim, cov khoom lag luam txo cov suab nrov hauv hluav taws xob thiab cov suab nrov sab nraud, kom ntseeg tau tias cov teeb liab tso tawm yog huv thiab tsis muaj kev cuam tshuam, thiab txhim kho cov teeb liab - rau - suab nrov piv ntawm cov ntaub ntawv ntsuas.

- Kev daws teeb meem siab: Nws muaj kev ntsuas siab, uas tuaj yeem ntes cov kev hloov pauv me me hauv kev nrawm, txawm tias me me zoo li acceleration lossis tsis muaj zog dynamic vibration signals, ua tau raws li qhov siab - ntsuas qhov xav tau ntawm ntau yam kev thov scenarios.

6. Kev khiav hauj lwm qhov kub thiab txias

Cov khoom lag luam muaj qhov kub thiab txias ua haujlwm ntau ntawm -55 ~ 180 degree, npog feem ntau qhov ntsuas kub ntawm daim ntawv thov, los ntawm qis - qhov kub ntawm qhov chaw sab nraum zoov mus rau qhov siab - kub downhole los yog industrial siab - kub ua hauj lwm tej yam kev mob. Qhov kev hloov pauv ntawm qhov kub thiab txias no, ua ke nrog nws cov yam ntxwv kub zoo heev thiab siab - qhov kub thiab txias, ua rau lub ntsuas ntsuas ntsuas kom ruaj khov thiab txhim khu kev qha hauv ntau qhov chaw kub, tsis tas yuav tsum muaj kev tiv thaiv kub ntxiv, nthuav dav nws daim ntawv thov thiab txo qhov nyuaj ntawm qhov chaw xa tawm.

1. Kev ntsuas inclining hauv roj Drilling

Raws li cov ntsiab lus tseem ceeb hauv kev ua haujlwm ntawm cov roj drilling, quartz accelerometers ua lub luag haujlwm tsis tuaj yeem hloov pauv hauv kev ntsuas kev xav, tshwj xeeb tshaj yog nyob rau hauv kev taw qhia drilling, qhov tob tob, thiab ultra- qhov sib sib zog nqus qhov drilling scenarios. Lawv cov yam ntxwv tshwj xeeb ua tau zoo zoo sib xws rau qhov chaw qis qis qis, ua kom qhov tseeb thiab txhim khu kev ntsuas ntawm tus cwj pwm zoo, uas yog qhov tseem ceeb rau kev txhim kho drilling efficiency thiab ua kom muaj kev nyab xeeb drilling.

Tawm tsam qhov hnyav downhole tej yam kev mob (siab kub txog li 180 degree, khaus vibration, siab siab, thiab drastic kub hloov), quartz accelerometers qhia pom tseeb zoo piv nrog ib txwm accelerometers.

Kev ruaj ntseg kub zoo heev thiab siab -kub tsis kam ua kom ruaj khov ntsuas qhov tseeb nyob rau hauv tag nrho downhole kub ntau yam (-55 ~ 180 degree), zam cov ntaub ntawv distortion los ntawm kub drift.

2. Kev sib cais kev vibration ntawm cov cuab yeej Precision thiab cov cuab yeej siv

Cov cuab yeej siv thiab cov cuab yeej ua tau zoo (xws li cov cuab yeej ntsuas aerospace, cov cuab yeej kuaj ntsuas ntsuas, thiab cov cuab yeej ua haujlwm siab -cov cuab yeej ua haujlwm siab) yog qhov nkag siab zoo rau kev co sab nraud. Txawm tias me me vibrations tuaj yeem cuam tshuam rau lawv qhov ntsuas qhov tseeb, kev ua haujlwm ruaj khov, thiab kev pabcuam lub neej. Quartz accelerometers, nrog rau lawv lub suab qis, siab daws teeb meem, thiab muaj zog tiv thaiv - muaj peev xwm cuam tshuam, yog qhov zoo tshaj plaws rau kev sib cais kev vibration ntawm cov khoom siv, pab ntsuas kev vibration cais cov teebmeem thiab txhim kho kev co kev sib cais tsim.

Tsis tshua muaj suab nrov thiab kev daws teeb meem siab tuaj yeem raug ntes me me vibration signals (txawm tias tsis muaj zog kev co hauv qab µg), kom ntseeg tau qhov tseeb thiab kev nkag siab ntawm cov ntaub ntawv xeem, uas yog qhov tseem ceeb rau kev ntsuam xyuas qhov hloov maj mam vibration cais tawm ntawm cov cuab yeej precision.

Cov lus teb ntau zaus (nrog tsawg- zaus mus rau siab- zaus vibration) tuaj yeem saib xyuas ob qho tib si kev co zoo li qub thiab kev co, hloov mus rau qhov sib txawv ntawm kev sib cais kev sib cais ntawm cov cuab yeej precision.

Ib hom kev kos duab sab nraud (round)

B hom kev kos duab sab nraud (square)

High Precision & Zoo heev Repeatability:Nrog xoom bias repeatability < 200µg, scale factor repeatability < 150ppm, thiab bias instability tsawg li 3.05µg, nws tuaj yeem raug ntes tau txawm tias me me hloov hauv acceleration, kom ntseeg tau tias cov ntaub ntawv ntsuas zoo ib yam thiab txhim khu kev qha nyob rau hauv ntev - lub sijhawm ua haujlwm.

Qhov kub thiab txias stability:Nruab nrog cov txheej txheem kub siab tshaj plaws, ua ke nrog qhov ntsuas kub ntawm qhov ruaj khov ntawm quartz siv lead ua, cov khoom lag luam tswj kev ua haujlwm ruaj khov thoob plaws qhov kev ua haujlwm kub (-55 ~ 180 degree). Qhov kub coefficient yog optimally<50μg/℃, effectively avoiding measurement errors caused by temperature drift, which is crucial for extreme temperature scenarios such as oil drilling downholes.

Kub Kub & Anti-Seismic Performance:Cov khoom lag luam tuaj yeem tiv taus ntau qhov kev ua haujlwm kub ntawm -55 ~ 180℃(customizable mus txog 200℃rau ultra-sib sib zog nqus zoo scenarios) thiab yog tsim los nrog ib tug reinforced shock-absorbing qauv, muaj peev xwm tiv taus nruam random vibration ntawm 25g (RMS, 10-20 Hz) tam sim ntawd mus txog 20 1000g / 0.5ms. Nws yog zoo kawg nkaus yoog mus rau qhov khaus vibration thiab high-temperature ib puag ncig ntawm cov roj drilling downholes.

Miniaturized & Ib qho yooj yim kev koom ua ke:Nrog rau micro- qauv tsim, cov khoom tsim qhov loj me yog ultra-lub teeb (qhov hnyav Tsawg dua lossis sib npaug li 25 grams), uas tuaj yeem ntsia tau yooj yim hauv qhov chaw- cov khoom siv txwv xws li downhole laum dab tshos, MWD systems, thiab precision instruments, tsis cuam tshuam nrog kev ua haujlwm ntawm cov khoom siv hauv tsev. Tus qauv tsim interface kuj pab txhawb kev sib koom ua ke nrog ntau cov ntaub ntawv tau txais cov tshuab thiab cov khoom siv tswv tsev

Strong Anti-Kev cuam tshuam & Corrosion Resistance:Txais siv hom tso zis tam sim no, cov khoom lag luam muaj zog tiv thaiv -electromagnetic cuam tshuam muaj peev xwm, uas tuaj yeem tiv thaiv cov teeb liab attenuation thiab suab nrov sab nraud hauv qhov chaw nyuaj. Lub siab precision ceramic ntim tsis tsuas yog txhim kho cov txheej txheem rigidity tab sis kuj muab kev tiv thaiv corrosion zoo heev thiab siab - siab tsis kam (txog 100MPa), yoog rau corrosive media xws li cov kua dej hauv cov roj drilling.

Flexible Output Options:Cov khoom txhawb kev xaiv qhov kub thiab txias tso zis hom thiab analog tso zis hom. Cov kev xaiv tsim tau -nyob rau hauv qhov kub thiab txias sensor tuaj yeem paub tiag- lub sijhawm ntsuas kub thiab kev tawm tswv yim, ua kom yooj yim rau kev them nyiaj kub tom qab thiab kho cov ntaub ntawv; cov analog tso zis hom yog sib xws nrog ntau yam ntaub ntawv tau txais systems, kev txhim kho cov khoom versatility.

Customization tsim:Raws li cov kev xav tau tshwj xeeb ntawm cov neeg siv khoom, peb tuaj yeem hloov kho cov khoom ntsuas kub tsis kam, ntsuas qhov ntau, qhov loj, thiab cov txheej txheem kev teeb tsa, ua kom zoo sib xws rau cov kev xav tau tshwj xeeb ntawm cov ntawv thov sib txawv (xws li ultra- qhov tob tob tob, siab - ntsuas ntsuas qhov tseeb).

1. Lub hauv paus ntsiab lus: Piezoelectric nyhuv ntawm Quartz Crystal

High-purity quartz siv lead ua muaj cov qauv crystalline tsis tu ncua. Thaum sab nraud acceleration ua rau cov siv lead ua, nws tsim inertial quab yuam, ua rau elastic deformation ntawm quartz siv lead ua. Qhov deformation no txhawb cov siv lead ua kom tsim cov polarization tshwm sim, tsim cov nqi zoo thiab tsis zoo ntawm nws qhov chaw -qhov no yog cov nyhuv piezoelectric. Qhov loj ntawm tus nqi generated yog nruj me ntsis proportional rau lub inertial quab yuam (thiab yog li qhov ntsuas acceleration), nteg lub hauv paus rau kev ntsuas ntau.

2. Cov txheej txheem ua haujlwm

- Thaum acceleration yog siv rau lub sensor, lub internal quartz sensing lub ntsiab yog raug rau inertial quab yuam, uas ua rau elastic deformation.

- Lub deformed quartz siv lead ua tsim ib qho piezoelectric nqi proportional rau qhov acceleration magnitude.

- Lub built-in - nyob rau hauv ib tug tshwj xeeb circuitry converts lub zog piezoelectric nqi mus rau hauv ib tug ruaj khov tam sim no teeb liab (tam sim no tso zis hom), uas muaj zog tiv thaiv - muaj peev xwm cuam tshuam.

- Cov zis tam sim no yog linearly cuam tshuam nrog cov tswv yim acceleration; cov neeg siv tuaj yeem tau txais cov ntaub ntawv nrawm nrawm nrawm los ntawm kev sib piv cov qauv tsim nyog.

3. Lub Ntsiab Ntxiv Mechanism

Txhawm rau kom ntseeg tau qhov ntsuas qhov tseeb hauv qhov chaw huab cua, qhov kev xaiv ua tau tsim - nyob rau hauv qhov kub thiab txias sensor yog kev sib xyaw. Nws saib xyuas qhov kub thiab txias nyob rau lub sijhawm tiag tiag thiab ua haujlwm tsis ncaj ncees thiab ntsuas qhov nyiaj tau los, ua kom muaj txiaj ntsig zoo ntawm qhov kub thiab txias ntawm cov nyhuv piezoelectric ntawm quartz siv lead ua, ua kom muaj kev ruaj khov nyob rau hauv tag nrho cov kev khiav hauj lwm kub ntau yam.

Q1: Dab tsi yog qhov tseem ceeb ntawm quartz accelerometers piv nrog silicon -raws li accelerometers?

A1: Qhov txiaj ntsig tseem ceeb nyob hauv lub cev zoo tshaj plaws ntawm quartz siv lead ua- tsis tshua muaj kev sib txhuam sab hauv, ultra- tsis tshua muaj hysteresis, thiab kub zoo heev. Nws muaj kev ntsuas siab dua (zero bias repeatability < 200µg), zoo dua rov ua dua, thiab muaj zog tiv thaiv qhov kub thiab txias, uas yog qhov tsim nyog rau siab - qhov tseeb thiab qhov kub thiab txias (xws li roj drilling downholes).

Q2: Dab tsi yog qhov kev khiav hauj lwm kub ntawm quartz accelerometer, thiab yuav ua li cas kom ruaj ntseg nyob rau hauv qhov kub thiab txias qhov chaw?

A2: Tus qauv kev khiav hauj lwm kub yog -55 ~ 180℃(customizable mus txog 200 degree). Nws tso siab rau qhov kev ruaj ntseg ntawm qhov kub thiab txias ntawm quartz siv lead ua thiab ua tau -nyob rau hauv qhov kub thiab txias kev siv thev naus laus zis (xaiv qhov ntsuas kub) los ua qhov kev tsis ncaj ncees ntawm lub sijhawm thiab qhov ntsuas qhov ntsuas qhov ntsuas, ua kom muaj txiaj ntsig zoo cuam tshuam qhov kub hloov pauv ntawm qhov ntsuas qhov tseeb.

Q3: Yuav ua li cas kho qhov ntsuas precision? Cov neeg siv tuaj yeem ua haujlwm ntawm nws tus kheej?

A3: Cov zis tam sim no ntawm cov khoom yog linearly proportional rau cov tswv yim acceleration. Cov neeg siv tuaj yeem ua tiav qhov siab - cov zis qhov tseeb los ntawm kev suav thiab xaiv cov qauv tsim nyog, uas yooj yim rau kev khiav lag luam thiab tuaj yeem ua tiav ntawm nws tus kheej yam tsis muaj kev sib tw thib ob.

Q4: Puas yog nws cuam tshuam los ntawm electromagnetic cuam tshuam? Yuav zam tau li cas?

A4: Cov khoom siv tam sim no tso zis hom, uas muaj zog tiv thaiv - muaj peev xwm cuam tshuam hluav taws xob. Tsis tas li ntawd, cov khoom siv txhawb nqa tuaj yeem cais tawm cov cim hluav taws xob sab nraud; thaum siv, tsis txhob txhim kho nws ze rau siab - cov khoom siv hluav taws xob hluav taws xob kom paub meej cov teeb liab ruaj khov.

Cim npe nrov: Tuam Tshoj Miniaturized Quartz Accelerometer Chaw tsim tshuaj paus, lwm tus neeg, Hoobkas