Kev ntsuas lub sij hawm teb ntawm 3-wire sensor hauv paus yuav ntsuas nws cov lus teb dynamic rau ib kauj ruam hloov ntawm qhov kub thiab txias. Cov txheej txheem feem ntau suav nrog txoj kev da dej ua kua lossis txoj hauv kev cua qhov. Cov txheej txheem suav nrog kev sau lub sijhawm xav tau rau lub sensor cov zis kom ncav cuag 63.2% ntawm nws qhov kawg ruaj khov-lub xeev tus nqi (hu ua lub sijhawm tas li, τ) lossis 90% ntawm tus nqi ntawd (T90).
I. Standard Test Method: Liquid Bath Method (pom zoo)
Haum rau feem ntau cov ntsuas kub ntsuas (piv txwv li, PT100), muab cov neeg raug siab thiab rov ua tau zoo dua.
Cov txheej txheem xeem:
Npaj ob lub qhov dej tsis tu ncua -Tub kub
Teem ib da dej rau qhov kub qis (piv txwv li, 0℃dej khov-} dej sib tov) thiab lwm qhov kom kub siab (piv txwv li, 100℃boiling dej los yog roj da dej);
Qhov kub sib txawv (ΔT) ntawm Ntau dua lossis sib npaug li 40℃yog pom zoo los txhim kho lub teeb liab - rau - suab nrov piv.
Hloov ceev ceev Sensor
Hloov pauv sai sai rau 3-hlau sensor los ntawm qhov qis- chav da dej kub mus rau chav dej kub; qhov kev hloov pauv yuav tsum nrawm thiab sib xws;
Kev siv lub tshuab hloov pauv tuaj yeem pab txo qis tib neeg kev ua yuam kev.
Siab -Speed Data Acquisition
Siv cov ntaub ntawv nrhiav tau (nrog rau qhov piv txwv ntawm ntau dua lossis sib npaug li 10 Hz) los sau cov ntaub ntawv tawm ntawm qhov nkhaus thaum nws hloov pauv lub sijhawm;
Tib lub sijhawm siv lub ntsuas ntsuas (piv txwv li, nyias- zaj duab xis platinum tiv thaiv tus pas ntsuas kub) kom ntsuas qhov ntsuas kub ntawm qhov hloov pauv qhov profile.
Xam lub sij hawm teb
Lub sij hawm tsis tu ncua (τ): Lub sij hawm xav tau rau cov zis kom ncav cuag 63.2% ntawm nws qhov kawg ruaj khov-tus nqi xeev;
T90: Lub sij hawm xav tau rau cov zis kom ncav cuag 90% ntawm nws qhov kawg ruaj khov-tus nqi xeev; Qhov ntsuas no feem ntau siv rau kev ntsuam xyuas engineering.
Piv txwv li: Yog hais tias lub sensor tau hloov pauv tam sim ntawd ntawm 0℃mus rau 100 degree, thiab nws cov zis nce mus txog 63.2℃tom qab 15 vib nas this, ces τ=15 s.
II. Lwm Txoj Kev: Cua Tunnel Method (Suitable for Gaseous Environments)
Siv los simulate tshav kub pauv hauv gaseous media raws li kev ua haujlwm tiag tiag.
Lub hauv paus ntsiab lus: Lub sensor tau muab tso rau hauv qhov siab - nrawm nrawm nrog qhov ntsuas kub tswj tau kom ua rau muaj qhov kub thiab txias hloov pauv;
Qhov zoo: Ntau dua simulates tiag tiag - ntiaj teb daim ntawv thov (piv txwv li, hauv cov kav dej lossis lub qhov cub);
Qhov tsis zoo: Kev sib pauv cua sov ua haujlwm qis dua li cov kua dej, ua rau lub sijhawm teb qeeb me ntsis, thiab yuav tsum tau kho / calibration.
III. Cov ntsiab lus tseem ceeb cuam tshuam rau kev ntsuas qhov tseeb
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Qhov xwm txheej |
Kev xav tau |
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Kauj Ruam Hloov Ceev |
Lub sijhawm hloov pauv yuav tsum luv dua li lub sijhawm teb ntawm lub sensor (pom zoo:<1 s). |
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Reference Sensor |
Cov lus teb ceev yuav tsum yog tsawg kawg yog 10 lub sij hawm sai dua li ntawm lub sensor nyob rau hauv kev sim; siv rau hauv paus calibration. |
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Data Sampling Rate |
Tsawg kawg yog 10 npaug ntawm qhov ntsuas qhov ntsuas zaus (piv txwv li, yog τ=10 s, tus nqi piv txwv yuav tsum siab dua lossis sib npaug rau 1 Hz). |
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Environmental Interference Control |
Tsis txhob muaj cua convection, vibration, thiab electromagnetic cuam tshuam, vim tias cov no tuaj yeem cuam tshuam kev nyeem ntawv. |
Standard Basis: Cov qauv thoob ntiaj teb-xws li IEC 60751-pom zoo siv cov txheej txheem da dej los txiav txim lub sijhawm teb.
