Qhov sib txawv ntawm Radar Level Gauge Thiab Ultrasonic Level Gauge

Lub radar qib ntsuas tau txais kev ua haujlwm ntawm kev sib kis-saib-kev txais tos. Lub kav hlau txais xov ntawm radar qib ntsuas emits electromagnetic tsis. Cov nthwv dej no tau cuam tshuam los ntawm qhov chaw ntawm cov khoom ntsuas thiab tom qab ntawd tau txais los ntawm tus kav hlau txais xov. Lub sij hawm los ntawm emission mus rau kev txais tos ntawm electromagnetic tsis yog proportional rau qhov deb ntawm cov kua nto. Kev sib raug zoo yog raws li nram no:
D=CT/2
Hauv cov qauv, D - qhov kev ncua deb ntawm radar qib ntsuas mus rau cov kua dej
C - qhov ceev ntawm lub teeb
T — electromagnetic nthwv dej khiav lub sij hawm
Lub ntsuas ntsuas qib radar sau lub sijhawm dhau los ntawm cov mem tes nthwv dej, thiab kev sib kis ceev ntawm lub tshuab hluav taws xob tsis tu ncua, yog li qhov kev ncua deb ntawm cov kua nto mus rau lub kav hlau txais xov radar tuaj yeem suav tau, kom paub cov kua theem ntawm cov kua dej. .
Hauv kev siv tswv yim, muaj ob hom radar qib ntsuas, FM nruam yoj hom thiab hom mem tes yoj. Cov kua theem ntsuas uas siv cov zaus hloov pauv tsis tu ncua yoj thev naus laus zis siv hluav taws xob ntau, yuav tsum siv plaub-xaim kab ke, thiab muaj cov khoom siv hluav taws xob sib txuas. Cov kua theem ntsuas siv radar pulse yoj thev naus laus zis muaj kev siv hluav taws xob tsawg thiab tuaj yeem siv tau los ntawm ob-xaim 24VDC, uas yooj yim kom ua tiav qhov kev nyab xeeb, qhov tseeb siab, thiab dav siv ntau yam.
Ultrasound siv suab tsis, thaum radar siv electromagnetic tsis. Qhov no yog qhov sib txawv loj tshaj plaws. Ntxiv mus, kev nkag mus thiab kev taw qhia ntawm ultrasonic tsis muaj zog ntau dua li electromagnetic tsis, uas yog vim li cas ultrasonic nrhiav tau nrov dua tam sim no.
Qhov sib txawv ntawm lub sijhawm tseem ceeb ntawm daim ntawv thov:
1. Ultrasonic qhov tseeb tsis zoo li radar.
2. Radar kuj kim heev.
3. Thaum siv radar, qhov dielectric qhov nruab nrab yuav tsum tau txiav txim siab.
4. Ultrasonic yoj tsis tuaj yeem siv rau hauv kev ua haujlwm xws li lub tshuab nqus tsev, cov ntsiab lus siab ntawm cov pa lossis ua npuas dej ntawm cov kua dej.
5. Qhov ntsuas radar ntau ntau ntau dua li ntawm ultrasonic tsis.
6. Radar muaj hom horn, hom pas nrig, thiab hom cable, uas tuaj yeem siv rau kev ua haujlwm nyuaj dua li ultrasonic tsis.
Peb feem ntau xa mus rau lub suab nthwv dej nrog lub suab nthwv dej ntau tshaj 20kHz raws li ultrasonic tsis. Ultrasonic nthwv dej yog ib hom kev siv tshuab yoj, uas yog, cov txheej txheem nthuav tawm ntawm txhua yam kev co hauv cov xov xwm elastic. Nws yog tus cwj pwm los ntawm qhov siab zaus, luv wavelength, thiab me me diffraction tshwm sim. Directionality zoo, tuaj yeem dhau los ua txoj kab hluav taws xob thiab kev nthuav tawm. Lub attenuation ntawm ultrasonic tsis nyob rau hauv cov kua thiab cov khib nyiab yog me me, yog li lub peev xwm nkag tau muaj zog, tshwj xeeb tshaj yog nyob rau hauv cov khib nyiab uas opaque rau lub teeb, ultrasonic tsis tuaj yeem nkag mus rau kaum ntawm meters ntev, thiab yuav muaj kev cuam tshuam tseem ceeb thaum ntsib impurities lossis cuam tshuam. . Cov khoom siv qib yog siv cov yam ntxwv ntawm nws.
Nyob rau hauv lub tshuab kuaj ultrasonic, tsis muaj teeb meem dab tsi ntawm cov cuab yeej ultrasonic, nws yog ib qho tsim nyog los hloov hluav taws xob hluav taws xob mus rau hauv ultrasonic tsis, thiab tom qab ntawd tau txais lawv rov qab thiab hloov lawv mus rau hauv hluav taws xob teeb liab. Cov cuab yeej ua tiav qhov haujlwm no yog hu ua ultrasonic transducer, tseem hu ua kev sojntsuam. Raws li pom nyob rau hauv daim duab, lub ultrasonic transducer yog muab tso rau saum cov kua yuav tsum tau ntsuas, thiab lub ultrasonic yoj yog emission downward. Lub ultrasonic nthwv dej dhau los ntawm huab cua nruab nrab thiab rov qab los thaum nws ntsib cov dej saum npoo av, thiab tau txais los ntawm transducer thiab hloov mus rau hauv lub teeb liab hluav taws xob. Tom qab kuaj pom cov teeb liab no, qhov ntsuas hluav taws xob hauv hluav taws xob hloov pauv mus rau hauv cov kua theem teeb liab rau cov zaub thiab cov zis.
Raws li lub hauv paus ntsiab lus ntawm ultrasonic propagation nyob rau hauv nruab nrab, yog hais tias lub nruab nrab siab, kub, ceev, humidity thiab lwm yam kev mob yog tas li, lub propagation ceev ntawm ultrasonic tsis nyob rau hauv nruab nrab yog ib tug tas mus li. Yog li ntawd, thaum lub sij hawm yuav tsum tau rau lub ultrasonic yoj yuav tsum tau reflected los ntawm cov kua nto yuav tsum tau txais yog ntsuas, qhov kev ncua deb mus los ntawm lub ultrasonic yoj yuav hloov dua siab tshiab, uas yog, cov ntaub ntawv qib kua yuav tau.
Ultrasonic muaj qhov muag tsis pom qhov chaw, thiab qhov kev ncua deb ntawm lub installation txoj hauj lwm ntawm lub sensor thiab cov kua yuav tsum tau muab xam thaum lub sij hawm installation.