Chifukwa Chiyani Mafuta a J1939 Akusowa Pawonetsero?

Mwasintha posachedwa kukhala chiwonetsero chamakono cha digito monga Garmin, Murphy, kapena chizolowezi cha Human-Machine Interface (HMI). Mukuyembekeza telemetry ya injini yowoneka bwino komanso kuwerengedwa kolondola kwa data. M'malo mowerengera momveka bwino, geji yamafuta imawunikira zolakwika, imawerenga ziro, kapena imakhalabe yopanda kanthu. Zokhumudwitsazi zimayimitsa ntchito nthawi yomweyo ndipo zimasiya ogwira ntchito akhungu kwambiri kuti asazindikire momwe amasungira mafuta.

Mu ma netiweki a mabasi a SAE J1939 ndi CAN, kuchuluka kwamafuta komwe kulibe nthawi zambiri sikumakhala chophimba chosweka. Nthawi zambiri zimakhala zolephera kulumikizana ndi hardware, kusagwirizana kwa protocol, kapena cholakwika chomasulira cha analogi kupita ku digito. Zowonetsa zamakono zamakono zimayembekezera mapaketi a data omwe amayendetsedwa mwamphamvu. Ngati paketi ya data ikusowa, yawonongeka, kapena kutumizidwa pa liwiro lolakwika, gejiyi imalephera kudzaza.

Bukuli likuphwanya zomwe zimayambitsa chizindikiro cha mafuta a J1939. Muphunzira kulekanitsa zolakwika pakati pa mawaya akuthupi ndi zigawo za ulalo wa data. Kuphatikiza apo, timafotokozera zofunikira pakusankha sensa yoyenera m'malo kapena chosinthira cha analogi kupita ku CAN. Mutha kugwiritsa ntchito izi kuti mubwezeretse kukhazikika kwa netiweki mwachangu.

Zofunika Kwambiri

• Mafuta a J1939 omwe sakuwonetsedwa pachiwonetsero nthawi zambiri amachokera ku zotsutsa zowonongeka, zosagwirizana ndi baud (250k vs. 500k), kapena kulephera kufalitsa PGN 65276 (SPN 96).

• Kukweza injini yakale kukhala HMI ya digito kumafuna chosinthira chapadera cha analogi kupita ku CAN ngati wotumiza wokaniza wasungidwa.

• Mukawunika wotumiza mulingo wa tanki watsopano wa SAE J1939, ikani patsogolo mayunitsi okhala ndi ma adilesi osinthika komanso ma IP67+ okhazikika pamagawo ovuta.

• Kuthetsa nkhaniyi mwadongosolo kumalepheretsa kusinthidwa kosafunikira kwa zowonetsera za digito zomwe zimagwira ntchito mokwanira.

Mtengo Wabizinesi wa Mafuta a J1939 Osawonetsa

Magalimoto onyamula katundu, zombo zapamadzi, ndi ma jenereta opangira mphamvu m'mafakitale amadalira kwambiri deta yolondola ya telemetry. Kugwira ntchito popanda deta yolondola yamafuta kumabweretsa chiwopsezo chachikulu m'magawo onsewa. Mumayang'anizana ndi kutha kwa mafuta kumadera akutali komanso kutsika kosayembekezereka panthawi yovuta kwambiri. Ma injini a dizilo ali pachiwopsezo chachikulu cha njala yamafuta. Kuthamanga kwa thanki yaikulu ya dizilo youma kotheratu nthawi zambiri kumapangitsa kuti mpweya ukhale wotsekeka kwambiri mu jekeseni. Kutulutsa magazi m'mizere yamafuta othamanga kwambiri kumafuna kulowererapo kwakukulu kwamakina, kukakamiza katunduyo kuti asagwiritse ntchito intaneti kwa maola ambiri.

Othandizira nthawi zambiri amaloza zala pazowonetsera zodula za digito pomwe ma geji alephera. Amalakwitsa molakwika mawonekedwe apamwamba a HMI pomwe kulephera kwenikweni kumabisika mkati mwa waya. Nthawi zambiri, mupeza cholakwika chosavuta cha wiring choyambitsa kuzima. Netiweki yolumikizidwa molakwika kapena pini ya dzimbiri ingayambitsenso sikirini yopanda kanthu yomweyi. Kuyimba mlandu pazenera kumabweretsa kuyesa kowononga komanso kukhumudwa kosatha kwa ogwira ntchito yosamalira.

Kukonzekera bwino kumakhazikitsa kuwulutsa kosalekeza, kosasunthika kwa data yamafuta m'basi yonse. Netiweki iyenera kutumiza deta pachizindikiritso cholondola popanda kukayika. Simuyenera kuwona kugunda kwa maukonde pazida zanu zowunikira. Dongosololi liyenera kuchotseratu zolakwika zilizonse zolumikizidwa nthawi zonse kapena kutha kwa nthawi. Kukwaniritsa izi kumatsimikizira magwiridwe antchito odalirika ndikubwezeretsanso chidaliro cha opareshoni pamageji awo a digito.

Physical Layer vs. Data Link: Kuzindikira Kusagwirizana

Kuzindikira chifukwa chake muli ndi a Mafuta a J1939 osawonetsa amafunika kugawa maukonde mu magawo awiri osiyana. Muyenera kuwunika mawaya akuthupi ndi pulogalamu ya digito ya protocol padera. Kusakaniza njira zothetsera mavutozi kumawononga nthawi yofunikira yowunikira.

Kupatula Gulu Lanyama (Wiring ndi Hardware)

Zosanjikiza zakuthupi zimanyamula mphamvu zamagetsi pakati pa owongolera. Ngati maziko awa akulephera, palibe deta ya digito yomwe imafika pachiwonetsero.

• Termination Resistors: CAN maukonde amafunikira kwambiri 120-ohm resistors pa malekezero onse a msana waukulu. Zopinga zomwe zikusowa zimabweretsa kuwunikira kwakukulu pamawaya. Kuwonetseraku kumasokoneza mapaketi a data ndikugwetsa deta yonse yamafuta. Nthawi zonse gwiritsani ntchito ma multimeter a digito kuyeza kukana kudutsa CAN High ndi CAN Low. Iyenera kuwerengera pafupifupi 60 ohms pomwe makinawo amatsitsidwa.

• Harness Integrity: Yang'anani njira yolumikizira mawaya mosamala motsatira chassis kapena hull. Yang'anani mawaya otsina a CAN High kapena CAN Low pafupi ndi ma bulkheads. Muyeneranso kutsimikizira zolumikizira zazikulu pamutu wa sensor. Malo osokonekera amapangitsa kuti magetsi azitsika. Zothandizira izi zimalepheretsa chipangizo cha transceiver kuti chisamawerenge bwino ma siginecha osiyanitsa.

• Cholumikizira Kuwonongeka: Yang'anani zolumikizira za green oxidation. Kulowa kwamadzi pa pulagi kumawononga ma voltages osavuta a CAN. Tsukani mapini bwinobwino ndikuthira mafuta a dielectric kuti musamachuluke chinyezi.

Kupatula Protocol Layer (Data ndi Mapulogalamu)

Ngati kuyesa kwa ma waya kumamveka bwino, vuto limabisala mu data layer. Kusintha kolakwika kwa mapulogalamu kumakhala kofala kwambiri pakukweza zida zotsatsa pambuyo pake.

• Baud Rate Mismatches: Ma network amayenera kuyankhula pa liwiro lomwelo. Ngati netiweki yanu yayikulu ya injini ikuyenda pa 500 kbps, koma sensa yolowa m'malo imawulutsa pa 250 kbps, kulumikizana kumalephera nthawi yomweyo. Chiwonetsero sichingathe kuwonetsa mapaketi a data omwe achedwa. Mudzawona zowonera zopanda kanthu kapena zolakwika zazikulu zakutha kwa nthawi yolumikizirana pamndandanda.

• PGN ndi SPN Verification: Chizindikiritso chamakampani cha Dash Display mlingo wamafuta ndi Parameter Group Number (PGN) 65276. Uthenga weniweniwu umagwiritsa ntchito Suspect Parameter Number (SPN) 96. Mukufunikira chida chodzipangira cha CAN analyzer kuti mutsimikizire izi. Ilumikizeni padoko lodziwira matenda ndikuwona kuchuluka kwa magalimoto. Ngati PGN 65276 ikusowa, sensa sikungotumiza.

• Kusefera kwa Chipata cha FMS: Mapulogalamu a Fleet nthawi zambiri amagwiritsa ntchito gawo lachipata cha Fleet Management Standard (FMS). Chipata ichi chimalekanitsa mosamala mabasi ofunikira kwambiri kuchokera ku basi yolengeza za telematics. Onetsetsani kuti chipata sichikusefa mulingo wamafuta wa PGN isanafike pawonetsero.

Vuto la Retrofit: Kuphatikizira Otumiza Analogi ku Zowonetsa Pakompyuta

Ma injini akale a dizilo amadalira ukadaulo wosavuta, wazaka makumi ambiri pakuyezera mafuta. Nthawi zambiri amagwiritsa ntchito ma analogi osamva omwe amamangidwa mozungulira poyandama pamakina. Otumizawa amatulutsa milingo yaiwisi yokana kukana ngati American standard 240-33 ohms kapena European standard 0-190 ohms. Zowonetsera zamakono za J1939 zimangomvetsetsa mapaketi apamwamba kwambiri a digito. Sangathe kuwerenga izi yaiwisi kukana magetsi mwachindunji, kupanga chikhazikitso hardware zosagwirizana.

Gulu Lamayankho: Zosintha za Analog-to-CAN

Simungafune kukhetsa tanki yayikulu yamafakitale nthawi yomweyo. Mutha kusankha kusiya gawo la analogi lomwe lilipo kwathunthu. Chipata cha analog-to-J1939 chingathe kuyika chizindikiro cha analogi chomwe chilipo pa digito. Gawo laling'ono ili, lamkati limagwira ntchito ngati womasulira wanzeru pakati pa wotumiza wakale ndi chiwonetsero chatsopano cha digito. Imawerenga kukana ndikuisintha kukhala paketi yovomerezeka ya CAN.

Komabe, muyenera kusamala kwambiri panthawi yogula zinthu. Pewani otembenuza otsika mtengo, opanda dzina kuchokera pamisika yapaintaneti wamba. Nthawi zambiri amakhala ndi maadiresi a hardcoded omwe simungathe kusintha. Ma adilesi olimba awa nthawi zambiri amasemphana ndi ma Engine Control Units (ECUs) kapena zowongolera zotumizira. Mkangano wamaadiresiwu umabweretsa kugundana kwapaintaneti, ndikugwetsa machitidwe ovuta osalumikizidwa.

Gulu Lamayankho: Kusintha Kwachindunji Kwa Digital

Njira yoyeretsera komanso yodalirika kwambiri yobwezeretsanso imaphatikizapo kubwezeretsanso zida zonse. Mumachotsa zida zakale, zamakina zolimbana ndi thanki. Inu ndiye kukhazikitsa mbadwa, olimba-boma CAN bus level level sensor sensor . Kusintha uku kumathetsa bokosi losinthira la middleman. Chigawo chatsopanocho chimawulutsa mapaketi a digito molunjika pamsana waukulu. Ngakhale zimafunikira mwayi wa tanki kuti ukhazikike, zimathandizira kwambiri kudalirika kwamanetiweki komanso kulondola kwa data.

Kuwunika Wothandizira SAE J1939 Tank Level Sender

Pamene matenda anu akuloza ku sensa yakufa kwamuyaya, muyenera kusankha cholowa m'malo mosamala. Osati aliyense Wotumiza mulingo wa tanki wa SAE J1939 amachitanso bwino m'malo ovuta komanso onjenjemera.

Measurement Technology

Ogula nthawi zambiri amasankha pakati pa mapangidwe amakono a capacitive ndi masinthidwe achikhalidwe a bango. Ma capacitive sensors amapereka kuwerengera kosalekeza, kokwera kwambiri poyesa kusintha kwa dielectric kwamadzimadzi palokha. Kukonza mapulogalamu amkatiwa kumachotsa ziwawa zomwe mumawona ngati kutsika kwamafuta mukamayenda mwaukali. Ndiwopambana kwambiri pakuphatikiza mabasi a CAN olondola kwambiri. Ma switch a bango amadalira choyandama cha maginito chomwe chimayenda pa bolodi yozungulira. Amangosintha zowerengera pamene choyandamacho chikudutsa mipata ya maginito.

Kusintha Kusinthasintha (N'kofunikira pa Zosankha za BOF)

Mufunika kusinthasintha kopitilira muyeso mukaphatikiza zida zatsopano ndi chilengedwe chomwe chilipo kale. Kutengera ma adilesi ndikofunikira kuti mugwiritse ntchito moyenera, popanda zolakwika. Dzifunseni mafunso ofunika kwambiri musanagule. Kodi mungasinthe mosavuta Adilesi ya Sensa pogwiritsa ntchito chida chosinthira chokhazikika? Kodi mutha kuwongolera mbiri ya tanki yamkati kuti ikhale yosasinthika kapena yosasinthika ya matanki? Matanki apamadzi a V-hull ndi akasinja okwera kwambiri amafunikira mapu amtundu wa volumetric. Ngati sensa ilibe luso lokonzekera, ikhoza kunena kuti thanki yodzaza theka molakwika chifukwa cha geometry yachilendo ya thanki.

Kukhalitsa ndi Kutsatira Miyezo

Kusindikiza kwachilengedwe kumatsimikizira moyo wa masensa am'madzi ndi olemetsa. Yang'anani kutsata kwachindunji, kolembedwa ndi muyezo wa SAE J1939. Mukufunanso ziphaso za CE ndi RoHS kuti muwonetsetse chitetezo chamagetsi. Samalirani kwambiri mavoti ovomerezeka a Ingress Protection papepala. Mufunika IP67 kapena IP68 kusindikiza chilengedwe kuti muteteze mayendedwe amkati. Kulowa kwamadzi kumakhalabe chifukwa chachikulu cha kufa msanga kwa sensa m'munda.

Kufananiza kwa Magwiridwe a Fuel Sender Technologies

Kukhazikitsa Zowona ndi Njira Zotsatira

Kutsatira ndondomeko yomveka bwino, yokonzedwa bwino kumapulumutsa maola ambiri okhumudwa. Gwiritsani ntchito njira zowunikirazi kuti mubwezeretse mawonekedwe anu mwadongosolo.

1. Yang'anani Magalimoto A Mabasi a CAN: Musanagule zida zatsopano, pulagi chowerengera cha J1939 padoko lalikulu lodziwira matenda. Mukhozanso kugwiritsa ntchito USB CAN sniffer yokhazikika pa laputopu. Yang'anani makamaka SPN 96 mumtsinje wa data. Ngati ilipo pa basi, sensor imagwira ntchito bwino. Chiwonetserocho chimangosinthidwa molakwika ndipo chimafunika kusinthidwa kwa mapulogalamu. Ngati paketi ikusowa kwathunthu, sensa kapena waya walephera.

2. Tsimikizirani Zomangamanga za Network: Onetsetsani kuti mwayika kumene Sensa yamafuta a J1939 imalumikizana ndi msana wolondola. Oyendetsa ambiri amawayikira mawaya mu basi yachiwiri mwangozi. Uku ndi kulakwitsa kofala kwambiri m'magawo ovuta a Marine NMEA 2000 ndi J1939 hybrid. Chiwonetsero sichingatseke malire popanda chipata chodziyimira pawokha.

3. Yang'anirani Kuyimitsa Kukaniza: Zimitsani mphamvu zonse za batri kudongosolo. Fufuzani mapini a CAN High ndi CAN Low okhala ndi ma multimeter. Onetsetsani kuti mukuwona 60 ohms. Ngati muwona ma ohm 120, mukusowa choletsa choyimitsa mbali imodzi ya basi. Ngati muwona 40 ohms kapena kuchepera, muli ndi zopinga zambiri zomwe zayikidwa.

4. Lembani Mwachidule Yankho: Yang'anani mwanzeru kupezeka kwa thanki yanu. Ngati thanki ikupezeka mosavuta kuchokera pamwamba, gulani mbadwa ya J1939 capacitive fluid level sensor. Njirayi imapereka kudalirika kwakukulu kwanthawi yayitali. Ngati thankiyo ili yosindikizidwa kwathunthu kapena yosafikirika pansi pazitsulo zolemera, gulani chosinthira chapamwamba kwambiri, chosinthika cha analogi-to-J1939 m'malo mwake.

Mapeto

Kubwezeretsanso zofunikira za telemetry kumafuna njira yodziwira matenda m'malo mosintha gawo mwachisawawa. Muyenera kutsimikizira kulumikizana kwakuthupi ndi masinthidwe a protocol musanakhudze zida za tanki. Mukakumana ndi kusagwirizana kwa analogi, sankhani zipata zapamwamba zomwe zingakonzedwe kuti muteteze kukhulupirika kwa netiweki. Kuti mulowe m'malo mwathunthu, ikani patsogolo ukadaulo wa solid-state capacitive kuti mutsimikizire kulondola kwambiri kwa malipoti. Nthawi zonse tsimikizirani mitengo ya baud ya netiweki yanu ndi ma adilesi oyambira panthawi yomaliza yoyika. Kutsatira malangizo awa kumawonetsetsa kuti zowonetsa zanu za digito zimapereka zolondola, zosasokonekera zogwirira ntchito kwa nthawi yayitali.

FAQ

Q: Kodi PGN ntchito J1939 mlingo mafuta?

A: Deta ya mlingo wamafuta nthawi zambiri imawulutsidwa pansi pa Parameter Group Number (PGN) 65276. PGN yeniyeniyi ikugwirizana ndi ntchito yokhazikika ya Dash Display. Mkati mwa paketi yauthenga iyi, netiweki imagwiritsa ntchito Suspect Parameter Number (SPN) 96 kuyimira Fuel Level 1 molondola.

Q: Kodi ndingalumikizane ndi wotumiza mafuta a analogi mwachindunji ku chiwonetsero cha J1939?

A: Ayi, simungathe kuwalumikiza mwachindunji. J1939 yamakono imangowonetsa mauthenga a digito a CAN okha. Otumiza analogi amatulutsa kukana kwamagetsi kosiyanasiyana ngati 240-33 ohms. Muyenera kukhazikitsa chipata chapadera cha analog-to-CAN. Chosinthirachi chimamasulira kukana kwamagetsi kosasinthika kukhala mapaketi a digito opangidwa bwino.

Q: Chifukwa chiyani mafuta anga amatsika pang'onopang'ono kufika paziro pa digito dash?

Yankho: Madontho apakatikati nthawi zambiri amawonetsa zinthu zosanjikiza thupi m'malo mwa masensa omwe anamwalira. Muyenera kuyang'ana zakusowa kwa 120-ohm kuthetsa zotsutsa pa CAN msana choyamba. Kenako, yang'anani chingwe chachikulu cholumikizira ma waya a CAN High kapena CAN Low. Pomaliza, tsimikizirani kugwirizana kwapansi pamutu wa sensor.

Q: Kodi ndikufunika 250k kapena 500k baud rate sensor?

A: Zimatengera momwe galimoto yanu kapena ma network anu amagwirira ntchito. Maukonde ambiri a J1939 olemedwa kwambiri amagwira ntchito pa 250 kbps. Komabe, makina atsopano amagetsi nthawi zambiri amasamukira ku liwiro la 500 kbps. Muyenera kufananiza kuchuluka kwa baud ya sensor yatsopanoyo ndi netiweki yanu yomwe ilipo kuti mupewe kulephera kwa kulumikizana.