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> Ïîìîæèòå. Êàê èçìåðèòü åìêîñòü ïëîñêîãî êîíäåíñàòîðà ñ âîäîé
evgen2
ñîîáùåíèå Jul 5 2016, 23:48
Ñîîáùåíèå #1


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Ãðàæäàíå, çàíèìàëñÿ ëè êòî-íèáóäü ïðàêòè÷åñêè äåòñêèìè èçìåðåíèÿìè åìêîñòè ïëîñêîãî êîíäåíñàòîðà, ïîãðóæåííîãî â îáû÷íóþ âîäîïðîâîäíóþ âîäó?.

Èìååòñÿ äâå ïëàñòèíû (èç ìåòàëëà) 100x60ìì ñ ðàññòîÿíèåì ìåæäó ïëàñòèíàìè ïîðÿäêà 100ìì. Ìåæäó ïëàñòèíàìè îáû÷íàÿ âîäà èç-ïîä êðàíà.
Íó âîò ÷òî-òî âðîäå òàêîãî


Ïî øêîëüíîé ôîðìóëå äëÿ ïëîñêîãî êîíäåíñàòîðà C= ε0*ε*S/d åìêîñòü äîëæíà áûòü îêîëî 0.4 0.04 íàíîôàðàä.
Áåðåì êîíäîâûé ñîâåòñêèé äèâàéñ äëÿ èçìåðåíèÿ åìêîñòè è ïîëó÷àåì




íó à åñëè áåç äèâàéñà ïîäàâàòü ñòóïåíüêó íàïðÿæåíèÿ íà êîíäåíñàòîð, òî ïîëó÷àåì âîò òàêóþ çàãîãóëèíó



Çàãîãóëèíà âðîäå áû êàê âïîëíå ñîîòâåòñòâóåò ñõåìå

RC-öåïî÷êè ñ ïàðàëëåëüíûì è ïîñëåäîâàòåëüíûì ñîïðîòèâëåíèÿìè. (èçâåñòíîå ñîïðîòèâëåíèå R=5êÎì, R1, R2 è C íåèçâåñòíû è îöåíèâàþòñÿ ïî ïåðåõîäíûì êðèâûì)

Îäíàêî åñòü íüþàíñ. Âñÿêèå ïîäãîíêè ïàðàìåòðîâ ñõåìû ïîä íàáëþäàåìûå êðèâûå äàþò çíà÷åíèÿ åìêîñòè íà óðîâíå ìèëëèôàðàä.
×òî íèêàê íå ïîõîæå íè íà øêîëüíóþ ôîðìóëó, íè íà çíà÷åíèå åìêîñòè, èçìåðåííîå äèâàéñîì.

È ÷òî äåëàòü - íåÿñíî.

Ñîîáùåíèå îòðåäàêòèðîâàë evgen2 - Jul 6 2016, 18:03
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_pv
ñîîáùåíèå Jul 6 2016, 14:17
Ñîîáùåíèå #2


Ãóðó
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Öèòàòà
Ïî øêîëüíîé ôîðìóëå äëÿ ïëîñêîãî êîíäåíñàòîðà C= ε0*ε*S/d åìêîñòü äîëæíà áûòü îêîëî 0.4 íàíîôàðàä.

íà ïîðÿäîê îøèáëèñü, âðîäå áû 40ïÔ äîëæíî áûòü, ÷òî íà ôîíå ïðîâîäèìîñòè âîäîïðîâîäíîé âîäû è íàìåðåííûõ 150 Îì - íå ðàçãëÿäåòü.

Öèòàòà
Ìåæäó ýëåêòðîäàìè - ïî÷âà, ïåñîê, ãðóíò, òîðô èëè êàêîå-íèáóäü ãîâíî.
íóæíî èçìåðÿòü âëàæíîñòü è íàëè÷èå ãðóíòîâîé âîäû. Ïî èäåå âëàæíîñòü - ýòî ñêîëüêî âîäû ìåæäó ýëåêòðîäàìè, ò.å. åìêîñòü êîíäåíñàòîðà ñ äèýëåêòðèêîì âíóòðè. Íàëè÷èå âîäû îïðåäåëÿåì ïî ñîïðîòèâëåíèþ.

åñëè ðå÷ü ïðî áîëüøèå ðàññòîÿíèÿ, ðàçáåðèòå ìèðêîâîëíîâêó è âìåñòî ýëåêòðîäîâ çàêîïàéòå ìàãíåòðîí, + èíäèêàòîð ïîëÿ èç Â× äèîäà.
ïîãëîùåíèå 2.4ÃÃö ó ïî÷âû, ïåñêà, ãðóíòà, òîðôà èëè êàêîãî-íèáóäü ãîâíà â çàâèñèìîñòè îò åãî âëàæíîñòè äîëæíî çàìåòíî ìåíÿòüñÿ.
òîëüêî ãëàâíîå â ìîìåíò èçìåðåíèÿ îêàçàòüñÿ ïîäàëüøå îò ìåñòà èçìåðåíèÿ.

íó èëè ïàðó ðàäèîìîäóëåé íà 2.4ÃÃö êîòîðûå RSSI ïîêàçûâàòü óìåþò. îäèí íà ïåðåäà÷ó, äðóãîé íà ïðè¸ì.
òîëüêî âîò êàê êàëèáðîâàòü ýòî - õç.
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Ñîîáùåíèé â ýòîé òåìå
- evgen2   Ïîìîæèòå. Êàê èçìåðèòü åìêîñòü ïëîñêîãî êîíäåíñàòîðà ñ âîäîé   Jul 5 2016, 23:48
- - Ìåäæèêèâèñ   Ýòî ïðîöåññû â äâîéíîì ýëåêòðè÷åñêîì ñëîå íà ãðàíè...   Jul 6 2016, 04:06
|- - evgen2   Öèòàòà(Ìåäæèêèâèñ @ Jul 6 2016, 07:06) Ýò...   Jul 6 2016, 07:48
|- - MegaVolt   Öèòàòà(evgen2 @ Jul 6 2016, 10:43) Ìåæäó ...   Jul 6 2016, 07:48
|- - Onkel   Öèòàòà(evgen2 @ Jul 6 2016, 11:48) Ìåæäó ...   Jul 6 2016, 21:25
|- - evgen2   Öèòàòà(Onkel @ Jul 7 2016, 00:25) èçìåðèò...   Jul 6 2016, 21:49
- - Àëåêñàíäð1   Ó êîíäåíñàòîðà ìåæäó ïëàñòèíàìè äîëæåí áûòü äèýëåê...   Jul 6 2016, 05:06
- - mcheb   Óâåëè÷üòå âðåìÿ èìïóëüñà ðàç â 10 è ëó÷øå ñäåëàòü ...   Jul 6 2016, 06:04
|- - evgen2   Öèòàòà(mcheb @ Jul 6 2016, 09:04) Óâåëè÷ü...   Jul 6 2016, 07:56
|- - MegaVolt   Öèòàòà(evgen2 @ Jul 6 2016, 10:56) òàê õî...   Jul 6 2016, 07:59
||- - evgen2   Öèòàòà(MegaVolt @ Jul 6 2016, 10:59) Òàê ...   Jul 6 2016, 08:08
||- - MegaVolt   Öèòàòà(evgen2 @ Jul 6 2016, 11:08) Äà íå ...   Jul 6 2016, 08:22
||- - evgen2   Öèòàòà(MegaVolt @ Jul 6 2016, 11:22) Áîþñ...   Jul 6 2016, 09:02
||- - MegaVolt   Öèòàòà(evgen2 @ Jul 6 2016, 12:02) Ïðåäïî...   Jul 6 2016, 09:54
||- - agregat   Öèòàòà(evgen2 @ Jul 6 2016, 12:02) Åñëè â...   Jul 6 2016, 10:08
||- - evgen2   Öèòàòà(agregat @ Jul 6 2016, 13:08) Äëÿ õ...   Jul 6 2016, 10:51
|- - MrYuran   Öèòàòà(evgen2 @ Jul 6 2016, 10:56) Ðàçíîï...   Jul 6 2016, 14:27
|- - _pv   Öèòàòà(MrYuran @ Jul 6 2016, 21:27) Íà ñà...   Jul 6 2016, 15:31
- - Onkel   êàê ïðàâèëüíî çàìåòèë ðÿä òîâàðèùåé, ó âàñ íå êîíä...   Jul 6 2016, 07:14
|- - evgen2   Öèòàòà(_pv @ Jul 6 2016, 17:17) íà ïîðÿäî...   Jul 6 2016, 17:16
|- - _pv   Öèòàòà(evgen2 @ Jul 7 2016, 00:16) åùå ìî...   Jul 6 2016, 18:07
|- - evgen2   Öèòàòà(_pv @ Jul 6 2016, 21:07) â îïòè÷åñ...   Jul 6 2016, 18:15
- - РўРёРјСѓСЂ Ð ÑžÐ Â°Ð Ñ   Òàê âû ãåîôèçèêó èçîáðåòàåòå. Ïîñìîòðèòå https://r...   Jul 6 2016, 18:15
|- - evgen2   Öèòàòà(РўРёРјСѓСЂ Ð ÑžÐ Â°Ð Ñ @ Jul...   Jul 6 2016, 18:37
- - Onkel   íó "ïðîêàëèòü" íå çíà÷èò ãðåòü äî 3 êèëî...   Jul 7 2016, 09:18
|- - evgen2   Öèòàòà(Onkel @ Jul 7 2016, 12:18) íó ...   Jul 7 2016, 10:43
|- - Ìåäæèêèâèñ   Öèòàòà(evgen2 @ Jul 7 2016, 14:43) Õî÷åòñ...   Jul 10 2016, 08:14
- - MrYuran   Âîò, îòêîïàë. Êñòàòè, êëàññíàÿ èäåÿ, ïðåîáðàçîâàò...   Jul 7 2016, 11:31
- - rx3apf   ß áû ïåðâûì äåëîì ïîïðîáîâàë LC-êîíóð, ãäå åìêîñòü...   Jul 7 2016, 18:52
|- - Onkel   Öèòàòà(rx3apf @ Jul 7 2016, 22:52) Ìîæíî ...   Jul 7 2016, 20:34
|- - evgen2   Öèòàòà(Onkel @ Jul 7 2016, 23:34) öåëàÿ ã...   Jul 7 2016, 21:18
- - GetSmart   Èçìåðÿòü, íàâåðíîå, ëó÷øå êàêèì-òî ìíîãîñòàäèéíûì ...   Jul 8 2016, 05:31
- - rudy_b   Êîíòðîëèðîâàòü âîäó ïðàâèëüíåå ïî äèýëåêòðè÷åñêîé ...   Jul 8 2016, 14:04

 

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