Momwe mungasankhire Level Transmitter?

• Mawu Oyamba

Liquid level kuyeza transmitter ndi chida chomwe chimapereka mulingo wamadzimadzi mosalekeza. Itha kugwiritsidwa ntchito kudziwa kuchuluka kwa zolimba zamadzimadzi kapena zochulukirapo panthawi inayake. Imatha kuyeza kuchuluka kwa zinthu zamadzimadzi monga madzi, viscous fluid ndi mafuta, kapena zowuma monga zolimba zambiri ndi ufa.

Makina oyezera mulingo wamadzimadzi amatha kugwiritsidwa ntchito m'malo osiyanasiyana ogwirira ntchito monga zotengera, akasinja ngakhale mitsinje, maiwe ndi zitsime. Ma transmitterswa amagwiritsidwa ntchito kwambiri m'mafakitale opangira zinthu, chakudya ndi zakumwa, mphamvu, mankhwala, ndi mafakitale oyeretsa madzi. Tsopano tiyeni tiwone ma metre angapo omwe amagwiritsidwa ntchito kwambiri.

• Submersible level sensor

Kutengera mfundo yakuti kuthamanga kwa hydrostatic ndi kolingana ndi kutalika kwamadzimadzi, sensa ya submersible level imagwiritsa ntchito mphamvu ya piezoresistive ya silicon yosakanikirana kapena sensa ya ceramic kuti isinthe kuthamanga kwa hydrostatic kukhala chizindikiro chamagetsi. Pambuyo pakulipiridwa kwa kutentha ndikuwongolera mizere, imasinthidwa kukhala 4-20mADC yotulutsa ma siginecha apano. Gawo la sensa la submersible hydrostatic pressure transmitter litha kuyikidwa mwachindunji mumadzimadzi, ndipo gawo la transmitter litha kukhazikitsidwa ndi flange kapena bulaketi, kuti ndilosavuta kukhazikitsa ndikugwiritsa ntchito.

Submersible level sensor imapangidwa ndi mtundu wapamwamba wodzipatula wosakanikirana ndi silicon sensitive element, womwe ukhoza kuyikidwa mwachindunji mumtsuko kapena m'madzi kuti muyese kutalika kwake kuchokera kumapeto kwa sensa kupita kumadzi, ndikutulutsa mulingo wamadzi kudzera pa 4 - 20mA kapena chizindikiro cha RS485.

• Magnetic level sensor

Chitoliro cha maginito chimakhazikitsidwa pa mfundo yodutsa chitoliro. Mulingo wamadzimadzi mu chitoliro chachikulu umagwirizana ndi zomwe zili muzotengera. Malinga ndi lamulo la Archimedes, mphamvu yokoka imayandama pamlingo wamadzimadzi wopangidwa ndi maginito oyandama mumadzimadzi. Pamene mlingo wamadzimadzi wa chotengeracho ukukwera ndi kutsika, choyandama chozungulira mu chitoliro chachikulu cha mita yamadzimadzi chimakweranso ndikutsika. Chitsulo chokhazikika cha maginito choyandama chimayendetsa ndime yofiira ndi yoyera mu chizindikiro kuti itembenuke 180 ° kudzera papulatifomu yolumikizira maginito.

Madziwo akakwera, zoyandamazo zimasintha kuchoka ku zoyera kukhala zofiira. Madziwo akatsika, zoyandamazo zimasintha kuchoka ku zofiira kukhala zoyera. Malire oyera-ofiira ndi kutalika kwenikweni kwamadzimadzi apakati mumtsuko, kuti azindikire kuchuluka kwamadzimadzi.

• Magnetostrictive liquid level sensor

Kamangidwe ka magnetostrictive madzi mlingo kachipangizo tichipeza zosapanga dzimbiri chubu (kuyezera ndodo), magnetostrictive waya (waveguide waya), zosunthika zoyandama (ndi okhazikika maginito mkati), etc. Pamene kachipangizo ntchito, dera gawo la sensa adzasangalala zimachitika panopa pa waveguide waya, ndi zimachitika pakali pano padziko maginito yoweyula maginito adzakhala kupanga waya.

Kuyandama kumakonzedwa kunja kwa ndodo yoyezera ya sensa, ndipo choyandamacho chimayenda mmwamba ndi pansi pamodzi ndi ndodo yoyezera ndi kusintha kwa mlingo wamadzimadzi. Pali seti ya mphete zokhazikika za maginito mkati mwa zoyandama. Pamene pulsed panopa maginito wakumana ndi maginito mphete maginito kwaiye ndi zoyandama, ndi maginito padziko zoyandama kusintha, kotero kuti waveguide waya opangidwa ndi magnetostrictive zakuthupi amapanga torsional yoweyula zimachitika pa malo zoyandamapo. Kugunda kumayendetsedwa kumbuyo kwa waya wa waveguide pa liwiro lokhazikika ndikuzindikiridwa ndi makina ozindikira. Poyesa kusiyana kwa nthawi pakati pa kufalitsa pulse current ndi torsional wave, malo oyandama amatha kutsimikiziridwa molondola, ndiko kuti, malo amadzimadzi.

• Radio Frequency Admittance Material Level Sensor

Kuvomereza pafupipafupi pawayilesi ndiukadaulo watsopano wowongolera mulingo wopangidwa kuchokera ku capacitive level control, yomwe ili yodalirika, yolondola komanso yogwira ntchito. Ndiko kukweza kwaukadaulo wa capacitive level control.
Zomwe zimatchedwa kuvomereza pafupipafupi kwa wailesi kumatanthauza kubwezerananso kwa mphamvu yamagetsi, yomwe imapangidwa ndi chigawo cha resistive, capacitive component ndi inductive component. Mawayilesi amawu ndi mafunde a wailesi ya mita yothamanga kwambiri yamadzimadzi, kotero kuvomereza pafupipafupi pawayilesi kumatha kumveka ngati kuyeza kuvomereza ndi mafunde apamwamba a wailesi.

Chidacho chikagwira ntchito, sensa ya chipangizocho imapanga mtengo wovomerezeka ndi khoma ndi sing'anga yoyezera. Pamene mulingo wazinthu umasintha, mtengo wovomerezeka umasintha molingana. Chigawo chozungulira chimatembenuza mtengo woyezedwa woyezedwa kukhala mulingo wa siginecha yazinthu kuti uzindikire muyeso wa zinthu.

• Akupanga mlingo mita

Akupanga mlingo mita ndi digito mlingo chida olamulidwa ndi microprocessor. Muyeso, pulse ultrasonic wave imatumizidwa ndi sensa, ndipo phokoso la phokoso limalandiridwa ndi sensa yomweyi itatha kuwonetsedwa ndi chinthu pamwamba, ndikusandulika kukhala chizindikiro chamagetsi. Mtunda pakati pa sensa ndi chinthu chomwe chikuyesedwa umawerengedwa ndi nthawi pakati pa mafunde a phokoso akutumiza ndi kulandira.

Ubwino palibe makina zosunthika mbali, mkulu kudalirika, yosavuta ndi yabwino unsembe, sanali kukhudzana muyeso, ndipo sanakhudzidwe ndi mamasukidwe akayendedwe ndi kachulukidwe madzi.

Choyipa ndichakuti kulondola kumakhala kochepa, ndipo mayesowo ndi osavuta kukhala ndi malo akhungu. Sichiloledwa kuyeza kuthamanga chotengera ndi kusakhazikika sing'anga.

• Radar mlingo mita

Njira yogwirira ntchito ya radar liquid level mita ikutumiza kuwonetsera kulandila. Mlongoti wa radar fluid level mita umatulutsa mafunde a electromagnetic, omwe amawonetsedwa ndi pamwamba pa chinthu choyezedwa kenako ndi kulandiridwa ndi mlongoti. Nthawi ya mafunde a electromagnetic kuchokera pakusintha kupita ku kulandira imayenderana ndi mtunda wamadzimadzi. Radar fluid level mita imalemba nthawi ya mafunde a pulse, ndipo kuthamanga kwa mafunde a electromagnetic kumakhala kosasintha, ndiye kuti mtunda kuchokera pamadzi kupita ku mlongoti wa radar ukhoza kuwerengedwa, kuti mudziwe mlingo wamadzimadzi amadzimadzi.

Mukugwiritsa ntchito, pali mitundu iwiri ya radar fluid level mita, yomwe ndi frequency modulation continuous wave ndi pulse wave. The madzi mlingo mita ndi pafupipafupi modulated mosalekeza yoweyula luso ali mowa mkulu mphamvu, anayi dongosolo waya ndi dera zovuta pakompyuta. Miyezo yamadzimadzi yokhala ndi ukadaulo wa radar pulse wave imakhala ndi mphamvu yochepa, imatha kuyendetsedwa ndi ma waya awiri a 24 VDC, osavuta kupeza chitetezo chamkati, kulondola kwambiri komanso kusiyanasiyana kogwiritsa ntchito.

• Motsogozedwa wave radar level mita

Mfundo yogwira ntchito yowongolera ma wave radar level transmitter ndi yofanana ndi ya radar level gauge, koma imatumiza ma microwave pulses kudzera pa sensor chingwe kapena ndodo. Chizindikirocho chimagunda pamtunda wamadzimadzi, kenako chimabwerera ku sensa, ndikukafika panyumba yotumizira. Zipangizo zamagetsi zomwe zimaphatikizidwa mu nyumba yotumizira zimatsimikizira kuchuluka kwamadzimadzi kutengera nthawi yomwe chizindikirocho chimayenda motsatira sensa ndikubwereranso. Mitundu ya ma transmitters awa amagwiritsidwa ntchito m'mafakitale m'magawo onse aukadaulo wamakina.