{"id":38728,"date":"2019-10-31T22:25:33","date_gmt":"2019-10-31T19:25:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/poddelnye-ds18b20-waterproof-chto-delat\/"},"modified":"2019-10-31T22:25:33","modified_gmt":"2019-10-31T19:25:33","slug":"poddelnye-ds18b20-waterproof-chto-delat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/poddelnye-ds18b20-waterproof-chto-delat","title":{"rendered":"DS18B20 waterproof t\u00eb rrem\u00eb: \u00e7far\u00eb duhet t\u00eb b\u00ebni?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

P\u00ebrsh\u00ebndetje! Ky artikull trajton problemin e sensor\u00ebve false, kufizimet e pajisjeve ekzistuese q\u00eb p\u00ebrdorin k\u00ebta sensor\u00eb dhe zgjidhjen e k\u00ebtij problemi.<\/p>\n

\"DS18B20
\nBurimi: ali-trends.ru<\/i><\/p>\n

Kam lexuar p\u00ebr sensor\u00ebt false m\u00eb par\u00eb dhe k\u00ebtu<\/a><\/noindex>. Dallimet karakteristike t\u00eb sensor\u00ebve false nga origjinalet:<\/p>\n

    \n
  1. Sensori, madje edhe i lidhur ngusht\u00eb, n\u00eb m\u00ebnyr\u00eb parazite p\u00ebrgjigjet me pasiguri, nganj\u00ebher\u00eb.<\/li>\n
  2. N\u00eb m\u00ebnyr\u00eb parazite, niveli i lart\u00eb rikthehet shum\u00eb ngadal\u00eb (mund t\u00eb matet me nj\u00eb mikrocontroler ose t\u00eb shihet nj\u00eb oscilogram)<\/li>\n
  3. konsumi i energjis\u00eb \u00ebsht\u00eb duksh\u00ebm m\u00eb i lart\u00eb se disa mikroamper\u00eb (GND dhe VCC n\u00eb minus, DQ p\u00ebrmes nj\u00eb mikroampermeteri n\u00eb +5 volt)<\/li>\n
  4. Pas procedur\u00ebs s\u00eb enumerimit (0xF0), sensor\u00ebt nuk p\u00ebrgjigjen n\u00eb komand\u00ebn p\u00ebr t\u00eb lexuar skrcin (0xBE)<\/li>\n
  5. Temperatura e lexuar nga skrci pasi \u00ebsht\u00eb furnizuar energjia pa nj\u00eb komand\u00eb matjeje ndryshon nga 85.0 grad\u00eb.<\/li>\n
  6. Vlerat n\u00eb skrcin n\u00eb pozitat 5 dhe 7 nuk p\u00ebrputhen me 0xFF dhe 0x10<\/li>\n
  7. Vlerat e temperatur\u00ebs (n\u00eb dy pozitat e para t\u00eb skrcit) t\u00eb lexuara pas ndezjes s\u00eb sensorit t\u00eb pap\u00ebrfshir\u00eb pa nj\u00eb komand\u00eb paraprake p\u00ebr matje, kthejn\u00eb vler\u00ebn e m\u00ebparshme, jo 50 05 (85.0 grad\u00eb).<\/li>\n<\/ol>\n

    \n<\/a><\/noindex>
    \nFatkeq\u00ebsisht, nuk kam nj\u00eb oscilogram, dhe si ndihm\u00ebs provues kam p\u00ebrdorur GPS-trackerin Galileosky BaseBlock Lite. <\/p>\n

    Sensor\u00ebt jan\u00eb bler\u00eb nga shit\u00ebs t\u00eb ndrysh\u00ebm, dhe vet\u00ebm nj\u00eb grup ka funksionuar me energji parazite. Jan\u00eb bler\u00eb gjithsej 5 grupe me nga 50 cop\u00eb secila.
    \nGrupet e tjera nuk kan\u00eb funksionuar fare me energji parazite. Terminali nuk parashikon energjimin e jasht\u00ebm p\u00ebr sensorin, dhe montimi i sistemit n\u00eb automjet duhet t\u00eb jet\u00eb sa m\u00eb i thjesht\u00eb.<\/p>\n

    Zgjidhja e problemit<\/h2>\n

    \nPra, sensor\u00ebt jan\u00eb bler\u00eb, por vet\u00ebm nj\u00eb grup ka funksionuar sakt\u00eb, dhe p\u00ebr t\u00eb hetuar e porositur nj\u00eb grup t\u00eb ri do t\u00eb duhej nj\u00eb koh\u00eb e konsiderueshme, dhe gjithashtu do t\u00eb sillte shpenzime t\u00eb tep\u00ebrta. Prandaj, problemin duhej ta zgjidhja vet\u00eb.<\/p>\n

    Duke pasur parasysh se p\u00ebrdoret vet\u00ebm nj\u00eb skem\u00eb me dy tela, \u00ebsht\u00eb e nevojshme t\u00eb organizohet energjia e sensorit nga teli i sinjalit, dmth, t\u00eb organizohet energjia parazite. Kam organizuar energjin\u00eb parazite sipas k\u00ebsaj skeme:<\/p>\n

    \"DS18B20
    \n
    \nN\u00eb k\u00ebt\u00eb skem\u00eb \u00ebsht\u00eb p\u00ebrmir\u00ebsuar funksionimi i energjis\u00eb parazite, megjithat\u00eb, \u00ebsht\u00eb l\u00ebn\u00eb mund\u00ebsia p\u00ebr t\u00eb lidhur energjin\u00eb e jashtme. N\u00eb k\u00ebt\u00eb rast, pak ndryshon skema e lidhjes: gjat\u00eb lidhjes me energjin\u00eb parazite, p\u00ebrdoret tela Vcc nuk p\u00ebrdoret<\/u>.<\/p>\n

    Pas montimit t\u00eb skem\u00ebs me kabll\u00eb, sensori u zbulua nga terminali me kapacitetin e kondensatorit prej 1 \u00b5F. P\u00ebr implementimin masiv, u projektuan dhe u porosit\u00ebn pllakat e panelizuara me pllaka p\u00ebr energjin\u00eb parazite:<\/p>\n

    \"DS18B20
    \n
    \nNj\u00eb moment interesant:<\/b> p\u00ebr sigurimin e sensorit, prodhuesit mund t\u00eb p\u00ebrdorin ngjit\u00ebs termik ose silikon. N\u00eb rastin e par\u00eb, mund t\u00eb ngrohni tubin, t\u00eb nxirrni sensorin, t\u00eb instaloni pllakat\u00ebn, ta ktheni n\u00eb tub dhe ta mbushni p\u00ebrs\u00ebri me ngjit\u00ebs termik. N\u00eb rastin e dyt\u00eb, kjo nuk do t\u00eb funksionoj\u00eb, dhe duhej t\u00eb isha i qepur pllakat\u00ebs pran\u00eb sensorit, ta mbushja me ngjit\u00ebs termik dhe t\u00eb veshja me termoizolim, si rezultat ai ka k\u00ebt\u00eb pamje:<\/p>\n

    \"DS18B20
    \n<\/p>\n

    P\u00ebrfundim<\/h2>\n

    \nK\u00ebtu do t\u00eb doja t\u00eb ftoj prodhuesit e pajisjeve t\u00eb marrin parasysh k\u00ebt\u00eb moment n\u00eb produktet e tyre, dhe tregtar\u00ebt - t\u00eb kontrollojn\u00eb sensor\u00ebt para shitjes ose t\u00eb mos ken\u00eb marr\u00ebdh\u00ebnie fare me furnizuesin n\u00ebse ai ofron sensor\u00eb fals\u00eb, dhe p\u00ebrdoruesit - t\u00eb heqin drit\u00eb mbi k\u00ebt\u00eb \u00e7\u00ebshtje n\u00eb komentet, e-mailet ose ankesa.
    \n
    Burimi:     habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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