accelerometer

Qhov no yog vim li cas accelerometers yog cov phooj ywg zoo ntawm gyroscopes: vim tias lawv tuaj yeem pom cov lus qhia zoo "downward" (tsawg kawg, thaum lawv nyob hauv lub xeev ntawm lub ntiajteb txawj nqus).

Zoo, feem ntau hais lus. Los ntawm ib lub sij hawm mus rau lwm qhov, nws tau txais lub ntiajteb txawj nqus, linear acceleration, centrifugal quab yuam generated los ntawm kev sib hloov, kev co, suab nrov thiab, ntawm chav kawm, qhov tsis xws luag ntawm lub sensor.

Yog li ntawd, txawm hais tias qhov ntsuas tus nqi siab thiab qhov zoo ntawm MEMS sensors (feem ntau zoo li gyroscopes), cov ntaub ntawv accelerometer tseem yog ib qho ntawm cov ntaub ntawv nrov thiab tsis ntseeg. Nws tau txais ob peb "sib cim" uas yuav tsum tau disambiguated. Tab sis nws yog qhov rhiab heev rau tag nrho cov teeb liab sib txawv uas ua rau nws zoo li thoob ntiaj teb-nws tuaj yeem hnov ​​​​txhua yam.

Muaj ob txoj kev sib koom ua ke ntawm kev nrawm ntawm txoj haujlwm uas peb xav paub tiag tiag, yog li peb yuav tsum tau sau ntau cov deltas thiab cov kab yuam kev, los ntawm kev ntsuas acceleration mus rau qhov kwv yees qhov ceev, thiab tom qab ntawd peb yuav tsum ua nws dua kom tau txais kev kwv yees. txoj hauj lwm. Yuam kev pheej mus tsuj.

Qhov no yog vim li cas GPS yog ib tug phooj ywg ntawm lub accelerometer: vim hais tias nws yuav "zero" txoj hauj lwm ua yuam kev ib ntus, ib yam li lub accelerometer maj mam zeroes lub azimuth yuam kev ntawm lub gyroscope.

magnetometer

Ib tug zoo compass yuav tsum tsis txhob ignored. Txawm li cas los xij, zoo li accelerometer, nws feem ntau yog siv los tswj txoj hauv kev mus sij hawm ntev gyro drift. Kev paub txog qhov kev taw qhia twg yog qhov tseem ceeb tshaj qhov kev paub qhov kev taw qhia yog sib nqus sab qaum teb-tab sis nrog ob qho no, peb tuaj yeem paub peb txoj haujlwm zoo hauv ntiaj teb.

Lawv feem ntau ua ke nrog GPS receivers, vim hais tias lawv ib zaug sib ntaus sib tua ntawm ib leeg lub zog tsis muaj zog, tab sis lawv zoo sib xws rau lwm yam. Ib tug muab ib tug ntxhib zoo heev txoj hauj lwm, thiab lwm yam muab ib tug ntxhib zoo heev kev taw qhia.