zahadny merak

[Krucinsky, Ladislav]

Přesně tak. V autech se tak konstruovaly měřiče paliva i teploty.

Zdravím
Ladislav Kručinský

-----Original Message-----
From: Hw-list <hw-list-bounces na list.hw.cz> On Behalf Of Šerých Jakub
Sent: Monday, December 21, 2020 9:24 PM
To: HW-news <hw-list na list.hw.cz>
Subject: RE: zahadny merak

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Nedělaly se takhle ve starých "analogových" autech palivoměry? V nádrži plovák hýbající potenciometrem a rozdílový měřák, se dvěma cívkami, aby nebyl závislý na momentálním napětí baterie.

Jakub Šerých

-----Original Message-----
From: Hw-list <hw-list-bounces na list.hw.cz> On Behalf Of Daniel Valuch
Sent: Monday, December 21, 2020 9:04 PM
To: hw-list na list.hw.cz
Subject: Re: zahadny merak

zabudol som napisat. Marian vravi, ze merak je z ruskeho lietadla.

On 21/12/2020 20:54, Daniel Valuch wrote:
> Zdravim osadenstvo,
>
> dnes som dostal rucickovy merak (dakujem Marian!) a snazim sa dojst na
> co je dobry :-)
>
> Foto vid. https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdvaluch.web.cern.ch%2Ftemp%2Fmerak.jpg&data=04%7C01%7Cladislav.krucinsky%40linde-mh.cz%7C44b44e36c01c4c6b2cff08d8a5ee56df%7C13c728e0bb0c4cf78e105b327279d6d9%7C0%7C0%7C637442301097624781%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=jLT78qQ3Mmj0SRzmr1%2BfZadqkJ80uqoR58V8rIp0ajk%3D&reserved=0
>
> Su tam dve cievky, otocene priblizne o 45 stupnov. Obidve maju velmi
> podobny odpor (230/290 Ohmov). Ked privediem prud na jednu cievku,
> rucicka sa pohne. Ked privediem ten isty prud na druhu cievku, rucicka
> nic nerobi.
>
> Ked pomocou jednej cievky dostanem rucicku na nejaku nenulovu
> vychylku, napriklad do stredu stupnice, prudom druhej cievky dokazem
> tu vychylku menit od nuly po maximum.
>
> Skusal som aj striedavy prud, napriklad ako fazomer s 0 a 90 stupnovou
> zlozkou, ale nic pochopitelne to neukazovalo. Jedine, co som potvrdil
> bolo, ze to ukazuje rozdiel prudov v cievkach. Ak nastavim 0 stupnov
> fazu, rucicka sa nehybe, ak 180, chodi v plnom rozsahu.
>
> Rozmyslam nad dvoma vecami. Ako sa to vola a na co je to dobre :-)
>
> Ak to ukazuje rozdiel amplitudy dvoch signalov, to by sa mozno dalo
> pouzit na indikaciu pomeru lalokov u ILS, ale tam sa myslim
> nepouzivali meraky s klasickou "pristrojovou" rucickou.
>
> b.
>
>
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