Yuav ua li cas siv multimeter los ntsuas qhov hnyav sensors
Cov ntsuas ntsuas tau dav siv hauv kev lag luam hnyav (xws li siv cov nplais hauv pem teb, ntsuas hluav taws xob, ntsuas tib neeg, thiab lwm yam), kev ntsuas kev quab yuam, thiab ntsuas qhov nro thiab ntsuas. Qhov txhaum ntawm qhov hnyav sensor thaum siv ntawm qhov chaw yog feem ntau raws li hauv qab no.
1. Sensor overload, kev sib txuas lus tsis meej ntawm cov neeg siv khoom thiab cov chaw tsim khoom, tsis sib haum xeeb ntawm qhov ntsuas qhov sib txawv thiab qhov tseeb quab yuam tus nqi, qhov hnyav loj, ua rau lub sensor overload, ua rau deformation ntawm sensor choj caj npab thiab Circuit Court imbalance. Sensors tsis tuaj yeem ua haujlwm tau zoo, tso zis teeb liab hloov pauv, tsis muaj kev tiv thaiv, thiab lwm yam tshwm sim.
2. Lub sensor lead yog rub tawm, thiab tus neeg siv tsis tau siv kev tiv thaiv thaum siv. Lub sensor txhuas feem ntau yog rub tawm ntawm lub sensor lead interface, uas cuam tshuam rau lub sensor siv yam tsis muaj lus teb lossis tam sim ntawd hloov ntawm qhov ntsuas ntsuas. 3. Kev siv cov sensors tsis raug, cov sensors zoo li qub yuav raug kev puas tsuaj loj xws li kev cuam tshuam, shear, thiab lub zog, ua rau lawv kho tsis tau.
Yog li yuav ua li cas peb thiaj li siv tau lub multimeter kom paub qhov ua txhaum ntau hauv qhov hnyav ntawm qhov chaw?
1. Lub chaw tsim khoom sensor muab qhov tso tawm sensor rhiab heev thiab lub zog hluav taws xob hluav taws xob ntawm lub Hoobkas, thiab peb kuaj xyuas cov teeb liab tso tawm sensor raws li ob qhov kev ntsuas no. Qhov ntsuas ntsuas hom ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas analog hauv millivolts. Piv txwv li, qhov rhiab heev ntawm lub sensor tso zis yog 2.0mV / V, thiab lub hwj chim mov voltage yog DC10V. Ob qhov tsis muaj peev xwm muab tau peb txoj kev sib raug zoo ntawm lub teeb liab tawm qhov hluav taws xob thiab qhov hluav taws xob excitation ntawm 2.0mV ib 1V. Lub sensor excitation ua hauj lwm voltage yuav tsum DC10V. Piv txwv li, yog tias lub sensor muaj ntau yam ntawm 50KG, ces muab lub sensor tag nrho cov zis ntawm 20mV nrog DC10V voltage. Raws li qhov kev sib raug zoo no, peb ntsuas lub sensor tso zis teeb liab siv mV iav ntawm multimeter. Lub sensor tsis muaj qhov tso tawm yog 0mV, uas yog qhov qub. Yog tias nws ntau dua qhov nqi no tab sis mus txog qhov nqi no, qhov kev hloov pauv ntawm tus nqi qhia tias lub sensor muaj xoom drift. Yog hais tias tus nqi loj, nws qhia tau hais tias lub sensor puas lawm los yog tus choj sab hauv yog ib lub voj voog, thiab tus choj caj npab kuj yog asymmetric.
2. Txiav txim siab seb lub ntsuas ntsuas qhov ntsuas qhov ntsuas puas puas raws li qhov ntsuas qhov ntsuas tau muab los ntawm lub Hoobkas, kev tawm tswv yim tsis kam, thiab tso tawm tsis kam. Qhov kev tawm tswv yim thiab tso tawm qhov tseem ceeb ntawm cov sensors txawv ntawm cov chaw tsim khoom rau cov chaw tsim khoom. Yog li qhov no yuav tsum tau kuaj xyuas raws li tus neeg tsim khoom daim ntawv lo. Siv lub multimeter los ntsuas qhov tsis kam ntawm cov khoom siv hluav taws xob thiab lub zog hauv av, nrog rau qhov tsis kam ntawm cov teeb liab xaim thiab cov teeb liab hauv av. Yog hais tias tus nqi kuj yog siab dua lub Hoobkas nqi, nws qhia tau hais tias lub sensor twb overloaded thiab lub strain gauge tau deformed. Yog hais tias tus nqi kuj yog infinite, lub sensor strain gauge yog heev puas thiab kho tsis tau.
3. Vim tias lub ntsuas hluav taws xob feem ntau ntsib cov xaim tawg thaum siv, thiab txheej txheej ntawm cov ntaub thaiv npog cov ntaub thaiv tsis zoo, peb pom qhov ntsuas lub ntsuas hluav taws xob kom pom tias nws puas lawm. Peb siv lub ohmic ntau yam ntawm ib tug multimeter los xyuas qhov txuas ntxiv ntawm lub sensor hlau. Yog tias qhov kev tiv thaiv tsis kawg, nws tau txiav txim siab tawg, thiab yog tias qhov hloov pauv hloov, kev sib cuag tsis zoo.
