Lub thawv hloov pauv kom paub meej qhov chaw pom los ntawm ntau lub tshuab tseem ceeb.
Ua ntej, hom kev txwv hloov nws lub tsev plays lub luag haujlwm tseem ceeb. Muaj ntau hom xws li mechanical, optical, thiab inductive limit switches. Mechanical limit switches ua haujlwm los ntawm kev sib cuag lub cev. Thaum cov khoom txav mus kov lub actuator ntawm qhov hloov, nws ua rau lub tshuab ua haujlwm hauv qhov hloov pauv. Kev tsim ntawm tus actuator thiab cov khoom siv sab hauv, zoo li snap - kev ua haujlwm mechanism, tso cai rau cov lus teb meej thiab rov ua dua. Piv txwv li, nyob rau hauv ib tug conveyor system, ib tug neeg kho tshuab txwv kev hloov nrog ib tug roller actuator tuaj yeem pom tseeb thaum lub pob tau mus txog qhov tshwj xeeb.
Optical limit switches siv lub teeb-based technology. Lawv muaj lub teeb-emitting diode (LED) thiab photodetector. Thaum ib yam khoom cuam tshuam lub teeb ci nruab nrab ntawm ob, qhov hloov pauv tau tshwm sim. Qhov tseeb ntawm qhov kev tshawb pom no nyob ntawm qhov ua kom pom tseeb thiab kev sib haum xeeb ntawm lub teeb beam. Nyob rau hauv high-precision daim ntaub ntawv xws li nyob rau hauv semiconductor manufacturing, optical limit switches yuav muab tau qhov tseeb heev nrhiav kom tau raws li qhov cuam tshuam ntawm lub teeb beam yuav precisely calibrated.
Inductive limit switches ua haujlwm raws li lub hauv paus ntsiab lus ntawm electromagnetic induction. Lawv tuaj yeem kuaj pom muaj cov khoom siv hlau tsis muaj kev sib cuag ntawm lub cev. Cov hlau nplaum uas tsim los ntawm qhov hloov pauv tau cuam tshuam thaum ib qho khoom siv hlau los ze txaus. Qhov rhiab heev thiab ntau yam ntawm cov keyboards no tuaj yeem hloov kho kom paub meej meej ntawm txoj haujlwm ntawm cov khoom siv hlau hauv lub tshuab hluav taws xob. Lub thawv hloov pauv kuj tseem muab lub tsev nyob ruaj khov thiab kev sib txuas hluav taws xob tsim nyog los xyuas kom meej tias cov keyboards no ua haujlwm raug thiab tsis tu ncua.
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