ASelo Yokwezerandi mtundu winawake wa transducer kapena sensa yomwe imasintha mphamvu kukhala mphamvu yamagetsi yoyezeka. Chipangizo chanu chachizolowezi cha load cell chimakhala ndi ma gauge anayi ofunikira mu kapangidwe ka mlatho wa tirigu. Mu kukula kwa mafakitale kusinthaku kumakhala ndi load yomwe imasinthidwa kukhala chizindikiro chamagetsi cha analog
Leonardo Da Vinci anagwiritsa ntchito malo a zolemera zoyezera pa chogwirira chamakina kuti agwirizane ndi kudziwa zolemera zosadziwika. Kusintha kwa mapangidwe ake kunagwiritsa ntchito zogwirira zingapo, chilichonse chokhala ndi kutalika kosiyana komanso chofanana ndi kulemera kofanana. Maselo olemera a hydraulic ndi electronic strain gauge asanalowe m'malo mwa zogwirira ntchito zamafakitale zoyezera, masikelo a zogwirira ntchito zamakanikowa ankagwiritsidwa ntchito kwambiri. Ankagwiritsidwa ntchito poyeza chilichonse kuyambira mapiritsi mpaka magalimoto a sitima ndipo ankachita izi molondola komanso modalirika bola ngati atayezera bwino ndikusamalidwa. Ankagwiritsa ntchito njira yoyezera kulemera kapena kuzindikira mphamvu yomwe idapangidwa ndi zogwirira ntchito zamakaniko. Zowunikira zoyambirira, zoyeserera mphamvu zoyezera kupsinjika zisanaphatikizepo mapangidwe a hydraulic ndi pneumatic.
Mu 1843, katswiri wa sayansi ya zamoyo wa ku Britain, Charles Wheatstone, adapanga njira yoyezera kukana kwa magetsi. Njira yoyezera kukana kwa magetsi ya Wheatstone ndi yabwino kwambiri poyesa kusintha kwa kukana komwe kumachitika mu njira zoyezera mphamvu. Ngakhale kuti njira yoyamba yoyezera mphamvu ya waya yolumikizidwa idapangidwa m'zaka za m'ma 1940, ukadaulo watsopanowu unakhala wotheka kwambiri paukadaulo komanso pazachuma mpaka pomwe zamagetsi zamakono zidayamba kugwira ntchito. Komabe, kuyambira nthawi imeneyo, njira zoyezera mphamvu zafalikira ngati zida zamakina komanso m'maselo odziyimira pawokha. Masiku ano, kupatula ma laboratories ena komwe kuli koyenera kugwiritsa ntchito njira zoyezera mphamvu, maselo oyezera mphamvu za magetsi ndi omwe amalamulira makampani olemera. Maselo oyezera mphamvu za pneumatic nthawi zina amagwiritsidwa ntchito komwe chitetezo chamkati ndi ukhondo zimafunidwa, ndipo maselo oyezera mphamvu zamadzimadzi amaganiziridwa m'malo akutali, chifukwa safuna magetsi. Maselo oyezera mphamvu zamadzi amapereka zolondola kuyambira 0.03% mpaka 0.25% ndipo ndi oyenera pafupifupi ntchito zonse zamafakitale.
Kodi imagwira ntchito bwanji?
Mapangidwe a maselo olemetsa amagawidwa malinga ndi mtundu wa chizindikiro chotulutsa chomwe chimapangidwa (pneumatic, hydraulic, electric) kapena malinga ndi momwe amazindikira kulemera (compression, tension, kapena shear)HydraulicMaselo onyamula katundu ndi zida zoyezera mphamvu, zoyezera kulemera ngati kusintha kwa kupanikizika kwa madzi odzaza mkati.PneumaticMaselo onyamula katundu amagwiranso ntchito motsatira mfundo ya mphamvu ndi kulinganiza. Zipangizozi zimagwiritsa ntchito chopopera chambiri
zipinda kuti zipereke kulondola kwakukulu kuposa chipangizo cha hydraulic.Kuyeza kupsinjikaMaselo onyamula katundu amasintha katundu womwe umagwira ntchito pa iwo kukhala zizindikiro zamagetsi. Ma geji okha amamangiriridwa pa mtanda kapena chiwalo chomangira chomwe chimasinthasintha pamene kulemera kukugwiritsidwa ntchito.
Nthawi yotumizira: Meyi-06-2021