Sensor Zoo Li Cas?
Tso lus
Cov yam ntxwv zoo li qub ntawm lub sensor yog hais txog lub teeb liab hauv lub cev, qhov tso zis ntawm lub sensor thiab cov tswv yim ntawm kev sib raug zoo ntawm tus nqi sib. Vim tias cov tswv yim thiab cov zis tsis yog lub sij hawm ywj siab, yog li txoj kev sib raug zoo ntawm lawv, uas yog, qhov kev xav ntawm tus cwj pwm kuj yog ib qho uas tsis yog-sij hawm-algebraic sib npaug, los yog cov tswv yim raws li kab zauv, qhov sib npaug ntawm cov kab thiab Kos cov yam ntxwv ntawm qhov qhia txog kev piav qhia. Lub ntsiab tsis tseem ceeb ntawm kev ua kom pom ntawm cov yam ntxwv ntawm lub cev yog: linearity, rhiab heev, hysteresis, repetition, drift, thiab lwm yam.
(1) Ncauj Tuaj: qhov kev sib txawv ntawm qhov sib txawv ntawm cov kab ntawm cov ciav hlau thiab cov lus qhia ntau. Txhais qhov piv ntawm qhov siab tshaj plaws ntawm qhov sib txawv ntawm qhov kev cwj pwm thiab cov kab phim ntawm cov kab ntau yam thiab qhov ntau cov nqi tso zis.
(2) Mob siab: qhov cuabyeej yog ib qho tseem ceeb ntawm cov yam ntxwv zoo li qub ntawm cov sensors. Nws txhais tias yog qhov sib piv ntawm qhov kev ua tiav ntawm cov zis rau qhov sib piv ntawm cov tswv yim uas ua rau qhov sib tw. Siv s los rhiab rhiab heev.
(3) Hysteresis: Sensors nyob rau hauv cov tswv yim los ntawm kev me me mus rau loj (zoo hlab ntsha tawg) thiab cov tswv yim los ntawm kev loj los me (rov qab hlab ntsha) hloov thaum lub sij hawm lawv cov zis tawm ntawm qhov nkhaus tsis coincide nrog qhov tshwm sim ua hysteresis. Rau tib lub teeb liab input, lub sensor tus positive thiab tsis pom zoo cov hlab ntsha tawg loj teeb liab yog tsis sib npaug, qhov sib txawv no yog hu ua hysteresis qhov txawv.
(4) Repeatability: Repeatability hais txog qhov tsis sib haum xeeb ntawm tus cwj pwm uas tshwm sim thaum tus sensor hloov rau tib qho kev coj ua rau ntau qhov sib luag ntawm ntau ntau sib luag.
(5) Drift: Lub sensor tus Drift yog cov input input unchanged, lub tso zis sensor nrog lub sij hawm hloov, qhov phenomenon no hu ua drift. Muaj ob qho laj thawj rau kev ua tiav: ib qho yog qhov tsis muaj tus cwj pwm ntawm qhov sensors, qhov tod yog qhov chaw nruab nrab (xws li kub, av noo, thiab lwm yam).
