Yuav ua li cas siv ib tug multimeter los ntsuas lub load cell
Load cells yog siv dav hauv kev lag luam hnyav (xws li siv cov nplais hauv pem teb, cov nplais hluav taws xob, cov nplai tib neeg, thiab lwm yam), kev ntsuas quab yuam, thiab ntsuas qhov nro thiab ntsuas. Qhov tsis ua haujlwm ntawm lub xov tooj ntawm tes thaum siv teb yog feem ntau raws li hauv qab no.
1. Lub sensor yog overloaded, tus neeg siv thiab cov chaw tsim tshuaj paus tsis tau sib txuas lus kom meej, lub sensor ntau thiab cov nqi zog tiag tiag, thiab qhov hnyav tsis sib xws, ua rau lub sensor overloaded, ua rau lub zog ntawm lub sensor choj caj npab deform. thiab ua rau lub voj voog tsis sib npaug. Lub sensor tsis ua hauj lwm ib txwm, cov zis teeb liab fluctuates, lub kuj yog infinite thiab hais txog.
2. Cov hlau lead ntawm lub sensor yog tawg, thiab tus neeg siv tsis tau ua kev tiv thaiv thaum siv. Cov hlau lead ntawm lub sensor tawg. Feem ntau, qhov tawg ntawm qhov sib cuam tshuam ntawm cov hlau lead hlau cuam tshuam rau kev siv lub sensor yam tsis muaj lus teb lossis qhov ntsuas tus nqi hloov pauv sai sai. 3. Kev siv tsis raug ntawm lub sensor. Thaum siv lub ntsuas hluav taws xob zoo li qub, muaj kev cuam tshuam cov quab yuam, shearing force, thiab torsion rog uas ua rau lub sensor puas thiab tsis tuaj yeem kho.
Yog li yuav ua li cas peb thiaj li siv tau cov multimeter kom paub qhov ua txhaum ntawm cov khoom thauj ntawm qhov chaw?
1. Lub chaw tsim khoom sensor muab lub sensor tso zis rhiab heev thiab lub hwj chim mov voltage ua ntej tawm hauv lub Hoobkas. Peb kuaj pom lub teeb liab tawm ntawm lub sensor raws li ob qhov kev ntsuas no. Lub strain gauge load cell outputs ib tug analog teeb liab millivolt voltage. Piv txwv li, lub sensor tso zis rhiab heev yog 2.0mV / V, thiab lub hwj chim mov voltage yog DC10V. Ob qhov tsis muaj peev xwm muab tau rau peb nrog lub sensor excitation voltage uas yuav tsum tau DC10V, thiab lub sensor tso zis teeb liab sib raug mus rau ib tug linear kev sib raug zoo ntawm 2.0mV ib 1V excitation voltage. Piv txwv li, tag nrho cov nplai ntawm lub sensor yog 50KG, ces tag nrho cov zis tawm ntawm DC10V voltage rau lub sensor yog 20mV. Raws li qhov kev sib raug zoo no, peb siv lub multimeter mV iav los ntsuas qhov tso zis teeb liab ntawm lub sensor. Nws yog qhov ib txwm muaj rau qhov tsis muaj qhov tso tawm ntawm lub sensor yog 0mV, uas yog ntau dua li tus nqi no, tab sis ze rau tus nqi no, thiab tus nqi hloov pauv txhais tau hais tias lub sensor muaj xoom drift. Yog hais tias tus nqi loj, nws txhais tau hais tias lub sensor puas lawm los yog tus choj sab hauv yog ib lub voj voog, thiab qhov kev tiv thaiv ntawm tus choj caj npab yog asymmetrical.
2. Raws li cov sensor tsis, input resistance thiab output resistance muab los ntawm lub sensor, txiav txim seb lub sensor strain gauge puas puas. Sensor input thiab output resistance qhov tseem ceeb sib txawv ntawm cov chaw tsim khoom rau cov chaw tsim khoom. Yog li qhov no yuav tsum tau kuaj raws li cov chaw tsim khoom daim ntawv lo. Siv lub multimeter los ntsuas qhov ohm txoj hauj lwm, qhov kev tiv thaiv ntawm lub hwj chim mov thiab lub hwj chim hauv av, thiab qhov tsis kam ntawm cov teeb liab kab thiab cov teeb liab hauv av. Yog tias nws loj dua tus nqi ntawm lub Hoobkas tsis kam, nws txhais tau hais tias lub sensor tau dhau lawm thiab qhov ntsuas ntsuas tau deformed. Yog hais tias tus nqi kuj yog infinite, lub sensor strain gauge puas loj heev thiab kho tsis tau.
3. Vim tias cov hlau lead hlau feem ntau tawg thaum siv lub sensor, tab sis txheej txheej ntawm sheath hlau tsis zoo, yog li lub sensor hlau tsis zoo los ntawm kev tshuaj xyuas qhov muag. Peb siv lub ohm iav ntawm lub multimeter los kuaj xyuas qhov txuas ntxiv ntawm cov xaim sensor. Yog hais tias qhov kev tiv thaiv yog infinite txiav txim siab ib tug so, yog hais tias tus tsis kam hloov kev sib cuag tsis zoo.
