Zuva rakanaka! Ichi chinyorwa chinoratidza dambudziko remanyepo emanyepo, izvo zvinogumira zvezvishandiso zviripo zvinoshandisa masensa aya uye mhinduro kudambudziko iri.
Kunobva: ali-trends.ru
Pamberi pangu, zvakanyorwawo nezve fake sensors . Hunhu mutsauko pakati pemanyepo ekunyepedzera uye yekutanga:
- Iyo sensor, kunyangwe yakabatana padyo, inopindura mune parasitic simba modhi zvisina chokwadi, kamwe kamwe munguva.
- Mune parasitic simba modhi, iyo yepamusoro inotora nguva yakareba kuti idzore (iwe unogona kuiyera ne microcontroller kana kuona oscillogram)
- kushandiswa kwazvino kwakakwira zvakanyanya kupfuura akati wandei ma microamps (GND uye VCC kuti minus, DQ kuburikidza ne microammeter kusvika +5 volts)
- Mushure memaitiro ekuverenga (0xF0), masensa haapindure kune scratchpad kuverenga kuraira (0xBE)
- Tembiricha yakaverengerwa kubva kuscratchpad mushure mekunge simba rashandiswa pasina kuyerwa kuraira kunosiyana kubva pa85,0 madhigirii.
- Iyo scratchpad values pazvinzvimbo 5 ne7 hazvienderane ne0xFF uye 0x10.
- Huwandu hwehutembiricha (munzvimbo mbiri dzekutanga dzescratchpad) inoverengwa mushure mekutanga kubatidzwa kwede-energized sensor pasina yakambopihwa kuyerwa kuraira dzorera kukosha kwekare, uye kwete 50 05 (85.0 madhigirii).
Nehurombo, ini handina oscilloscope, uye Galileosky BaseBlock Lite GPS tracker yakashanda sebhenji rekuyedza.
Masensa akatengwa kubva kune vakasiyana vatengesi, uye batch rimwe chete rakashanda nekuda kwesimba reparasitic. Zvikamu zvishanu chete zvezvikamu makumi mashanu zvakatengwa.
Zvimwe zvacho hazvina kushanda nekuda kwesimba reparasitic zvachose. Iyo terminal haipe simba rekunze re sensor, uye kuiswa kweiyo system pamotokari kunofanirwa kurerutswa zvakanyanya sezvinobvira.
Troubleshooting
Saka, masensa akatengwa, asi batch rimwe chete rakashanda nemazvo, uye kuferefetwa uye kurongeka kwebhechi idzva kwaizotora nguva yakanaka, uye kungadai kwakakonzera kuwanda kwemutengo. Nokudaro, dambudziko racho raifanira kugadziriswa roga.
Sezvo chete maviri-waya dunhu rinoshandiswa, zvinodikanwa kuronga magetsi kune sensor kubva kune chiratidzo chechiratidzo, ndiko kuti, kuronga simba reparasitic. Ndakaronga simba reparasitic maererano nechirongwa chinotevera:
Muchirongwa ichi, kushanda kwesimba reparasitic kunovandudzwa, asi panguva imwechete, zvinoramba zvichikwanisika kubatanidza simba rekunze. Muchiitiko ichi, dhizaini yekubatanidza inoshanduka zvishoma: kana uchibatanidza kuburikidza neparasitic simba, iyo Vcc waya kwete kushandiswa.
Mushure mekuunganidza dunhu nekukwira pamusoro, sensor yakaonekwa neiyo terminal ine capacitor inokwana 1 µF. Nekuita kuwanda, mabhodhi ane mapuranga ane parasitic simba mabhodhi akagadzirwa uye akarairwa:
Chinofadza pfungwa: Vagadziri vanogona kushandisa inopisa melt adhesive kana silicone kuvhara sensor. Muchiitiko chekutanga, unogona kupisa sleeve, kubvisa sensor, kuisa bhodhi, kuidzosera kune sleeve uye kuizadza ne glue yakawanda inopisa. Muchiitiko chechipiri, izvi hazvichashanda, uye ndaifanira kutengesa bhodhi pedyo ne sensor, kuizadza ne glue inopisa uye kuisa pane kupisa shrink, somugumisiro inoita seizvi:
mhedziso
Pano ndinoda kukurudzira vagadziri vemidziyo kuti vatore pfungwa iyi muzvigadzirwa zvavo, uye vatengesi vatarise ma sensors vasati vatengesa kana kusatarisana nemutengesi zvachose kana vakapa ma sensors ekunyepedzera, uye vashandisi kuti varatidze iyi musoro mumashoko, tsamba. kana zvikumbiro.
Source: www.habr.com