Txoj kev teeb tsa ntawm qhov chaw nres tsheb hauv av sensor coil (ua tiav kev tsim kho)
I. Kev npaj ua ntej kev tsim kho
ib. Qhov chaw tshawb fawb
• Tsis txhob muaj cov kab nrib pleb, thaj chaw uas muaj cov kab nrib pleb thiab cov hlau manhole npog. Tsis muaj ntau tshaj lossis sib npaug rau 220 V cable hauv 1 m nyob ib ncig ntawm lub kauj.
• Qhov chaw nruab nrab ntawm cov coils uas nyob ib sab yog ntau dua lossis sib npaug li 2 m; Yog hais tias tus ntes tau sib koom, nws tuaj yeem txo mus rau 0.5 m, tab sis qhov zaus yuav tsum tau staggered.
b. Cov ntaub ntawv thiab cov cuab yeej
• Hlau: 1.0 mm² kub resistant tinned tooj liab hlau los yog Teflon multi-strand mos hlau, kub resistant -40℃+125℃.
• Sealing: asphalt, epoxy resin los yog mos polyurethane, nrog ib tug Shore hardness ntawm ntau tshaj los yog sib npaug rau 60 tom qab kho.
• Cov cuab yeej: txoj kev cutter ( hniav 4-8 hli), inductance tester, LCR meter, lub kaum sab xis grinder, hlau crimping pliers, thiab lwm yam.
2. Hlau trough txiav
ib. Zoo thiab loj
• Cov duab plaub feem ntau yog: sab ntev ⊥ tsav kev taw qhia, ntev - mus rau - dav piv 1.5:1–2: 1.
• Qhov loj me: 2 m (ntev) × 1 m (dav) rau txoj kab dav 3 m; 45℃chamfers yog ua nyob rau ntawm plaub lub ces kaum kom tsis txhob txiav thiab txiav.
• Groove qhov tob 30–50 mm, dav 4–8 mm, yuam kev Tsawg dua los yog sib npaug ± 2 mm; Nyob rau tib lub sij hawm, txiav ib tug feeder groove rau lub rooj vag chassis.
b. Groove ntxuav
• Yaug cov av nkos nrog lub siab - rab phom dej siab → siv lub tshuab ziab plaub hau kom qhuav kom txog thaum hauv qab ntawm qhov zawj tig dawb → siv primer los txhim kho kev sib txuas.
3. Coil winding
ib. Tus naj npawb ntawm tig thiab inductance
• Lub hom phiaj inductance 100–300 μH; 2 m × 1 m kauj tuaj yeem ncav cuag 180 μH nrog txog 6 lem.
• Ntsuas thaum winding: Siv lub ntsuas inductance los ntsuas lub sijhawm. Qhov me me qhov ncig, qhov ntau tig.
b. Winding specifications
• Cov xov hlau raug ncaj, ze rau hauv qab, tsis muaj kev hla, thiab txhua txheej yog nruj nreem txuas; txoj cai "6+2" raug pom zoo: 6 txheej rau lub hauv paus, thiab 2 txheej ntxiv nyob ntawm qhov ntsuas tau.
• Yuav tsum tsis muaj pob qij txha hauv lub kauj; yog tias nws yuav tsum tau txuas nrog, nws yuav tsum tau welded + tshav kub shrink tubing rau ob chav waterproofing.
4. Lead ua
ib. Twisted khub shielding
• Cov kab tso zis tsawg dua lossis sib npaug li 5 m, nrog ntau dua lossis sib npaug li 20 twists ib 'meter'; qhov kawg siv shielded twisted khub (STP), thiab cov shielding txheej yog grounded ntawm ib kawg.
• Cov hlau lead yog dhau los ntawm PVC raj lossis hlau raj, thiab qhov kev ncua deb ntawm qhov muaj zog tam sim no ntau dua lossis sib npaug li 30 cm; ntxiv ib lub raj hlau thaiv thaum nws tsis tuaj yeem nyob deb.
b. Txuag ntev
• Khaws 1.5–2 m rau qhov kawg ntawm lub tsheb kuaj xyuas kom yooj yim txuas thiab kho.
5. Sealing thiab kho
ib. Txheej txheej potting
• Ua ntej sau 10 hli nplua xuab zeb tsis zoo → 160–180℃molten asphalt lossis ob -cov khoom siv epoxy resin potting, 24 teev kho.
b. Kho qhov chaw
• Qhov siab sib txawv ntawm qhov sealing nto thiab txoj kev yog tsawg dua los yog sib npaug li 2 hli. Tom qab sib tsoo nrog lub kaum sab xis grinder, siv cov xim pleev xim kom rov zoo li qub ntawm txoj kev.
6. Debugging thiab txais
ib. Tib lub tshuab kuaj
• Tsis muaj-load inductance 100–300 μH; siv 300 hli × 300 hli × 2 hli hlau phaj kom npog tag nrho cov kauj, qhov taw qhia lub teeb hloov los ntawm flashing mus tas li lub teeb thiab tom qab ntawd txav mus, thiab lub rooj vag cia li poob hauv 3 s kom tsim nyog.
b. Kev sib koom ua ke debugging
• Lub tsheb hla ntawm 5 km / h, ua rau ncua Tsawg dua lossis sib npaug li 50 ms, lub tswb tsis tseeb<0.1 %.
• Txuas nrog daim ntawv tso cai daim ntawv lees paub thiab lub rooj vag: cov lus teb ntawm nias hlau thiab nqa ncej yog<1.5 s; anti-smashing test - the pole stops and rebounds within 0.3 s when it falls and encounters metal signal.
7. Cov teeb meem tshwm sim thiab kev tawm tsam
• Tsawg inductance: ntxiv 1-2 lem los them nyiaj rau kev cuam tshuam ntawm underground steel tuav.
• Crosstalk between adjacent coils: the difference in number of turns is ≥2 turns, and the difference in operating frequency is >5 kHz.
• Lub caij ntuj no tawg: siv qis-kub hloov tau yooj yim epoxy resin los yog ntxiv nylon hlua los txhim kho toughness.
Raws li cov kauj ruam saum toj no, hauv av sensor coil tuaj yeem ua haujlwm ruaj khov rau lub sijhawm ntev, thiab muab cov cim qhia kev ntseeg siab rau qhov chaw nres tsheb qhov rooj, daim ntawv tso cai daim ntawv lees paub thiab lwm yam.