Основы измерений. Долгополов В.Т. - 45 стр.

UptoLike

ВУЗ: 

МФТИ | Москва

Составители: 

Рубрика: 

khijhlb\e_gbyfb R
aj
, R
bj
. Dh]^Z gZijy`_gb_ gZ \oh^_ h^gh]h ba ^bh^h\ klZgh\blky
iheh`bl_evguf, l._. V
i
ij_\urZ_l V
ref
R
aj
/R
bj
, khhl\_lkl\mxsbc ^bh^ ^Z_l \deZ^ \ h[sbc
lhd b \ \uoh^gh_ gZijy`_gb_.
V
0
= -RI = -R 6 (V
i
– V
j
)/R
aj
.
Ykgh, qlh khhl\_lkl\mxsbf ih^[hjhf j_abklhjh\ fh`gh j_Zebah\Zlv ijbf_jgh
iZjZ[hebq_kdmx oZjZdl_jbklbdm. ?_ nhjfbjh\Zgb_ h[e_]qZ_lky _s_ b l_f, qlh ^bh^gu_
oZjZdl_jbklbdb g_ b^_Zevgu b m]eu gZ knhjfbjh\Zgghc oZjZdl_jbklbd_ [m^ml k]eZ`_gu.
< ijbgpbi_, ZgZeh]bqgZy ko_fZ iha\hey_l j_Zebah\Zlv d\Z^jZlbqgh_
ij_h[jZah\Zgb_ b hljbpZl_evghc qZklb \oh^gh]h kb]gZeZ, Z lZd`_ nmgdpbx \aylby dhjgy
d\Z^jZlgh]h ihke_ mkj_^g_gby.
Jbk. 50.
:evl_jgZlb\guc f_lh^ baf_j_gby kj_^g_d\Z^jZlbqgh]h agZq_gby khklhbl \
ij_h[jZah\Zgbb baf_jy_fh]h kb]gZeZ \ l_ieh\mx wg_j]bx b baf_j_gbb, ih kmlb,
\u^_ey_fhc fhsghklb. Khhl\_lkl\mxsbc ij_h[jZah\Zl_ev ihdZaZg gZ Jbk. 51Z. <oh^ghc
lhd l_q_l ih gblb gZdZeZ gZ]j_\Zy __. L_fi_jZlmjZ gblb baf_jy_lky l_jfhiZjhc,
kh_^bg_gghc k gblvx kl_deygghc dZi_evdhc. IjZdlbq_kdZy ko_fZ ih^h[gh]h mkljhckl\Z
bah[jZ`_gZ gZ Jbk. 51b. <gZqZe_ klhbl ij_h[jZah\Zl_ev gZijy`_gb_-lhd. Lhd gZ]j_\Z_l
gblv gZdZeZ h^gh]h ba b^_glbqguo [ebadh jZkiheh`_gguo b \dexq_gguo gZ\klj_qm
ij_h[jZah\Zl_e_c. ?keb dhwnnbpb_gl mkbe_gby HM ^hklZlhqgh \_ebd, lh blh]h\Zy
jZaghklv ihdZaZgby l_jfhiZj jZ\gZ gmex. Ke_^h\Zl_evgh, \uoh^gh_ gZijy`_gb_ V
0
= i
f
R
=D I
RMS.
Ih^h[gu_ mkljhckl\Z fh`gh ijbf_gylv ^h ^h\hevgh \ukhdbo qZklhl, ihjy^dZ 60
F=p. H^gZdh hgb bf_xl b jy^ g_^hklZldh\: bg_jpbhgghklv, aZ\bkbfhklv hl l_fi_jZlmju
hdjm`Zxs_c kj_^u b l.^.
Jbk. 51. 
khijhlb\e_gbyfb Raj, Rbj. Dh]^Z gZijy`_gb_ gZ \oh^_ h^gh]h ba ^bh^h\ klZgh\blky
iheh`bl_evguf, l._. Vi ij_\urZ_l Vref Raj/Rbj , khhl\_lkl\mxsbc ^bh^ ^Z_l \deZ^ \ h[sbc
lhd b \ \uoh^gh_ gZijy`_gb_.
       V0 = -RI = -R 6 (Vi – Vj)/Raj.
Ykgh, qlh khhl\_lkl\mxsbf ih^[hjhf j_abklhjh\ fh`gh j_Zebah\Zlv ijbf_jgh
iZjZ[hebq_kdmx oZjZdl_jbklbdm. ?_ nhjfbjh\Zgb_ h[e_]qZ_lky _s_ b l_f, qlh ^bh^gu_
oZjZdl_jbklbdb g_ b^_Zevgu b m]eu gZ knhjfbjh\Zgghc oZjZdl_jbklbd_ [m^ml k]eZ`_gu.
       < ijbgpbi_, ZgZeh]bqgZy ko_fZ iha\hey_l j_Zebah\Zlv d\Z^jZlbqgh_
ij_h[jZah\Zgb_ b hljbpZl_evghc qZklb \oh^gh]h kb]gZeZ, Z lZd`_ nmgdpbx \aylby dhjgy
d\Z^jZlgh]h ihke_ mkj_^g_gby.




                                       Jbk. 50.

      :evl_jgZlb\guc f_lh^ baf_j_gby kj_^g_d\Z^jZlbqgh]h agZq_gby khklhbl \
ij_h[jZah\Zgbb baf_jy_fh]h kb]gZeZ \ l_ieh\mx wg_j]bx b baf_j_gbb, ih kmlb,
\u^_ey_fhc fhsghklb. Khhl\_lkl\mxsbc ij_h[jZah\Zl_ev ihdZaZg gZ Jbk. 51Z.

Страницы