Yuav ua li cas siv lub multimeter los ntsuas lub ntsuas qhov hnyav
Cov ntsuas ntsuas tau dav siv hauv kev lag luam hnyav (xws li siv cov nplais, ntsuas qhov ntsuas hluav taws xob, ntsuas hluav taws xob, ntsuas tib neeg, thiab lwm yam), ntsuas kev quab yuam, thiab ntsuas qhov ntsuas siab. Feem ntau qhov ua txhaum ntawm qhov hnyav sensor thaum siv ntawm qhov chaw yog raws li hauv qab no.
1. Lub sensor yog overloaded, thiab cov neeg siv thiab cov chaw tsim tshuaj paus tsis sib txuas lus kom meej. Lub sensor ntau thiab qhov tseeb quab yuam tus nqi, nrog rau qhov hnyav qhov hnyav, tsis sib xws, ua rau lub sensor overload thiab deformation ntawm lub sensor choj caj npab tsis kam, ua rau kev tsis sib haum xeeb. Lub sensor tsis tuaj yeem ua haujlwm zoo, cov teeb liab tso zis hloov pauv, thiab muaj qhov tshwm sim xws li tsis muaj qhov tsis kam lees.
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 qhov tsis hnov tsw lossis hloov pauv tam sim ntawm qhov ntsuas ntsuas. 3. Kev siv tsis raug ntawm cov sensors, static sensors uas muaj kev puas tsuaj loj xws li kev cuam tshuam, shear, thiab torsion thaum siv, ua rau lawv tsis tuaj yeem kho.
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. Lub hom phiaj ntsuas hom hnyav quab yuam sensor outputs 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 peb txoj kev sib raug zoo ntawm lub sensor excitation ua hauj lwm voltage thiab qhov yuav tsum tau DC10V. Lub sensor tso zis teeb liab sib haum mus rau 2.0mV tso zis ib 1V excitation voltage. Piv txwv li, yog tias tag nrho cov nplai ntawm lub sensor yog 50KG, ces tag nrho cov zis tawm ntawm lub sensor yog 20mV nrog DC10V voltage. Raws li qhov kev sib raug zoo no, peb siv lub multimeter mV iav los ntsuas lub teeb liab tawm ntawm lub sensor. Qhov tsis muaj qhov tso tawm ntawm lub sensor yog qhov qub ntawm 0mV, uas yog ntau dua li tus nqi no, tab sis thaum nws mus txog qhov nqi no, qhov kev hloov pauv ntawm tus nqi qhia tias lub sensor muaj xoom drift. Yog 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 tsis kam 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 cov zis 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 ib lub multimeter los ntsuas qhov kev tawm tsam ntawm lub hwj chim mov thiab hauv av, nrog rau qhov tsis kam ntawm cov teeb liab xaim thiab 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 strain gauge ntawm lub sensor yog heev puas thiab kho tsis tau.
3. Vim tias qhov tawg ntawm cov hlau lead ntau zaus thaum siv cov sensors, thaum txheej txheej txheej ntawm cov hlua hlau tsis zoo, peb pom qhov tseeb ntawm cov hlau sensor. 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.
