R76 - Malangizo a International Padziko Lonse - Zokha Zida zolemera Amapanga zero mfundo ndi zero ndikukhazikitsa nkhani yofunika kwambiri, osangotulutsa zomwe zikufunikira, komanso kukhazikika kwa zigawo za zingwe zilizonse ndi chitsimikizo chofunikira pakuyeserera kwake. Mawu otsatirawa ndi ogwirizana kwambiri ndi zero, tikufotokozera, kusanthula.
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. Kwa miyeso yamagetsi, kuphatikiza: Semi - chipangizo chokhacho chosinthika, chida chokha cha quong, chida choyambirira, chida chotsatira cha zero.
(4) Kulondola kwa Zero: Pambuyo pa sikelo
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. Chipangizo chotsatirira zero ndi chipangizo chokha cha zero.
Chida chotsata zero chitha kukhala ndi mayiko anayi: ayi, osathamanga, kuthamanga, kuchokera pa ntchito.
Chipangizo chotsatirira zero chimaloledwa kugwira ntchito pamene:
- Mtengo wowoneka ndi zero, kapena wofanana ndi mtengo wolemera wa net pomwe cholemera chachikulu ndi zero;
- ndipo ndalama zilidi zokhazikika;
- Konzanso sizambiri kuposa 0,5 e / s.
1.
Monga kuchuluka kwazinthu zambiri zamagetsi ku China pakalipano, pali chipangizo chotsatila zero, kotero kufunika koyesa zolakwa za zero, muyenera kuwonetsetsa kuti kutsata zero sikungakhale kugwira ntchito. Kenako, chipangizo chotsatirira zero "sichimatha" njira yokhayo ndikuyika kulemera kwina koyandikira pafupi ndi zero point, kotero kuti kutsata zero kupitirira koyenda.
(1) Dziwani kuchuluka kwa chipangizo cha zero
Chifukwa cha miyezo yoyenera komanso njira zophatikizira munjira ya zero sizitsimikizika mwanjira, zomwe zimapezeka kuti pali anthu ena pachimake, motero kuwonetsa kuti chida chowunikira kuti chibwerere kwa zinthu zomwe zili bwino. Pachifukwa ichi, wolemba mwachidule mu ntchito yeniyeni ya njira, mutha kuyendayenda mwachangu kuti muwone kutsata njira za zero.
Yatsani mphamvu, khazikitsani kwa osachepera 30min, ikani katundu wa 10e pamtengo wonyamula katundu, kotero kuti mawonekedwe a Zero "angogwiritsa ntchito ntchito. Ikani katundu wa 0.3e nthawi zonse pa 2s ndikuwona mtengo wake.
Pambuyo atatu motsatizana 0,3e, sikelo yomwe imawonetsa kuwonjezeka kwa gawo limodzi, kuwonetsa kuti chipangizocho sichili kapena sichigwira ntchito.
Ngati sikelo sizikusintha mtengo pambuyo pa katundu 3 wa 0.3e, unityo ndikugwiritsabe ntchito kuwongolera mkati mwa 0.5E / s.
Kenako, chotsani katundu wa 3.3e ndipo kukula kwake kuwonetsa kuchepa kwakukulu kwa gawo limodzi.
Chifukwa chiyani 3 0,3e katundu akugwiritsidwa ntchito?
Katundu wa 0.3E ndiwochepera kuposa momwe 0,5E / s; Ndipo katundu wa 3 0,3e ndi wamkulu kuposa 0.5E / s ndi ochepera kuposa kuchuluka kwa 1E / s (chifukwa kuchuluka kwa kukonzanso kumakula pa 0,5e / s
(2) Makamaka amaika katundu wambiri wopitilira zero
R76, pa nthawi ya mayeso omwe akufunsidwa, amafunikira katundu wa 10E kuti aikidwe kupitirira mitundu ya zero. Bwanji osadzaza 5e, bwanji osadzaza ndi anthu awiri?
Ngakhale pamalingaliro apadziko lonse lapansi ndipo malangizo athu oyenera amafotokozedwa momveka bwino kuti kuchuluka kwa chipangizo chotsatiridwa zero kuyenera kukhala "0.5e / s" opanga zida sizinakhazikitse chida chotsata zero panthawiyi. Ngakhale opanga zida zina zolemera, kukhazikitsa mtengo wokwanira kwambiri (pakadali pano onani kuchuluka kwa mawonekedwe a 6e / s).
2. Chenjerani molondola
If the weighing instrument does not have zero tracking function, or there is a special switch to close the zero tracking device, in the detection of “zero accuracy” and “zero error”, there is no need to put additional load (10e). The problem is that most of the weighing instruments in China are not equipped with a switch that can close the zero tracking device, and they all have the zero tracking function, so in order to get the zero error, we have to put an additional load (10e) to make it go beyond the zero tracking range when the scale is unloaded, so that we can get the accuracy of the zero setting “near zero” and the “zero error”. This results in a “near zero” zeroing accuracy. Sequentially place 0.1e additional weights until the value increases significantly by one division (I+e), and the total of the additional weights is ∆L, so that the zeroing error is: E0=10e+0.5e-∆L-10e=0.5e-∆L≤±0.25e. If the total of the additional weights is 0.4e, then: E0=0.5e-0.4e=0.1e<±0.25e. .
3. Meaning of determining zeroing accuracy
Cholinga chodziwitsa kulondola kwa zigawo za Zero ndikuwonetsetsa kuti kuwerengera kwa "cholakwika cholakwitsa musanakonzedwe" kumalizidwa muzovuta. Mukayang'ana kulondola kwa sikelo, pre pre - cholakwika chikhoza kupezeka ndi formula: e = i +e - - - - l. Pofuna kudziwa molondola cholakwika pakuwunikira kwakanthawi, ndikofunikira kukonza ndi cholakwika cha zero, i.e.: EC = e0≤mpe.
Pambuyo pokonza cholakwika cha malo owoneka bwino ndi cholakwika cha zero, ndizotheka kukonza mtengo womwe ukupitilira muyeso wovomerezeka monga woyenerera, kapena kukonza mtengo womwe umawoneka ngati wosayenerera. Komabe, mosasamala kanthu kuti chivomerezo chayenera kapena chosayenera, cholinga chogwiritsa ntchito zolakwika za zero pokonza ndikupanga zotsatira zoyeserera pafupi ndi kulondola kwenikweni kwa sikelo.
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Choyamba, kambudzi uyenera kudziwa zolakwa za zero motere: musanachotse katundu wonyamula katundu wambiri, kenako Njira yokhayo yowotchera, e = 10e + 0,5 e = 10e + 0.e - 10l - δlp ± 0.5E. Ngati zowonjezera zowonjezera zimadziunjikira kwa 0.8E, ndiye: e0 = 0.5e - 0.8E = 0.E<±0.5e.
Post Nthawi: Aug - 14 - 2023