??????( Experimental purpose):

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??? ????
?????? ?????? ??????????
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??? ????
??????( Experimental purpose)
1???????,????????????? 2????????,??????????? 3??
??????????,??????????
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????Experimental device

• 1????? vernier caliper

??????????????????? ????????? ????????????????????
????????????,?????
????????0.02mm,0.05mm,0.10mm???
4
?????????
5
??S0.1mm ???S00
??S0.05mm ???S00
??S0.02mm ???S00
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?? principle

• ????????????????????10?20?50??.??10???????????????
  ???,?????

???,???????a,??a1mm,?????L?9a,?????10?,?n10,????
??????b,?
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?????????????i
i????????????,????????,??????????????????
?????????????,????????????????0.1mm,??????1,?2,,?
9?????????????,??????????????0.1mm, 0.2mm, ,0.9mm
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???? reading method

• 1.???0??????????????k

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??1
Y100mm8x0.1mm100.8mm
10
??2
Y100mm37x0.02mm100.74mm
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??3
Y100mm15x0.05mm100.75mm
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???? measure of steps

• ?????,???????????
• ??????,??????,?????
• ??????
• ??
• ??

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???? cautions

• ?????????????????????????????
• ????????????,???????????????,??????????????,??????
  ?
• ???,??????,?????????,???????????????

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2??????(?????) micrometer screw
??????????,???????????
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??principle

• ???????????????,??????????0.01mm,????????0.5mm??D?
  ????,F?????0.5mm,????E?????50??,?????0.01mm,????0.
  01mm?

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???? reading method

• ??????????????????,?????????E??,????????????????
  ??????????

?????????(???????x??)
????????????????
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??1
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??2
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??3
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??4
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3????? physical balance
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? ?
??1
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500.54 g
??1
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? ?
??2
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200.44 g
??2
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???? programme of operation

• 1.?????(?????)
• (1)????????????,??1?????????????,??2????????
  ????,??????????????
• (2)?????????,?????????????,?????????
• (3)????????????????,???????????,?????????????????
  ?????,???,???,???,???????

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• 2.??
• ??????,?????,?????,????????
• (1)??????????????????,?????????????????,??????????
  ??????????,?????????
• (2)?????????????????????????
• ?,?????(????????)?

• 3.????
• ?????????,???????,??????????????,????????????
• 4.??(??????????????)

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? ?????????,????????????,???
????????????????????0.5??
??????????????????????

• ?????????

m1??????s?????? a???a0???????

• ?????????

m?,a???????????????????? m?,a????????????????????
?
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????Experimental assignment
2?????????????????D,??6????????
3?????????????????????
4?????????????????????
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??????????????????
1???????????
???????????? m1 ,??????????????? m2
,???????????
????
???
?????????,?
????,?????????????0???
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2???????????
???????????????,???????????????????
????,??????0, ???'
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???????data recording and processing
? ????????????
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?????? ?? ,?? mm,?ins0.02mm,????

?? ??? ? ? D1(mm) H1(mm)
1 34.70 30.10
2 34.70 30.12
3 34.68 30.10
4 34.68 30.10
5 34.70 30.12
6 34.70 30.12
34.69 30.11
S 0.010 0.010
4.210-3 4.410-3
?A 0.01 0.01
?B 0.02 0.02
0.02 0.02
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???
???????
????????
A?????
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B?????
??????????
??????????
??????????
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(2)???????
?
28458.32(mm3)
1.310-30.13
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(mm3)(?? ??1? ????)

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