Thí Nghiệm Đo Lường Điều Khiển Bằng Máy Tính

7/21/2019 Th Nghim o Lng iu Khin Bng My Tnh

1/14

th nghim o lng iu khin bng my tnh

b1: mu

b2: k qua cng song song

b3: k led, lcd bng cng nt

b4: hthng k nhit

b5: k tc ng c DC

b6: iu khin vtr ng c DC

b7: k qua cng usb: card 6008 v phn mm labview

b8: Card thu thp dliu v k pci-1711 v pci-6221

thi

BT lp (TB) 50%

thi lm mch 50%

ti

2sv/1 ti 2 nhm trng

1. k 8led n dng pic16f887/877a giao tip my tnh qua cng nt (com)

2. K LCD qua com

3. k 8led n dng my tnh qua cng song song(lpt)

4. k led ma trn dng pic giao tip PC qua cng LPT

5. K nhit giao tip PC qua cng COM (// on/off)

6. K tc ng c mt chiu dng pic giao tip com (PID s)

7. k ng c bc dng pic giao tip pc qua cng com (pp on/off)

8. k 8led dng card 6008 v lp trnh labview


2/14

bi 1: mu

I.vb 6.0

th d: vit ct hin ththng bo Chao cac ban lop DHDT6A v ngy gi

- to 1 nt nhn, khi ta nhn vo th ct shin ththng bo

bc 1:

b2: file new project>> standrad.exe

b3: ko thnt nhn vo

b4:vit m lnh

private sub Command1_click()

msgBox Chao cac ban lop DHDT6A &Now

End Sub

2. kiu dliu

- snguyn: integer

khai bo: DIM tn bin as kiu

vd: DIM a as interger

a=5

- snguyn di: long 32bit

DIM b as long

b=100 000

- sthc: single hay double

DIM C as double

c=3.14

- kiu chui: String


3/14

DIM d as string

d = Xin chao

d$=Xin chao

3. cu trc iu khin

a. lnh if thenelse

ex: if a>b then max=a

bi tp ttrang 1-4 trang 21

1. nhp 2 snguyn a,b. tnh tng hiu tch phng

td:

DIM a as integer

a= InputBox(a=)

xut MsgBox

2. nhp 2 sthc a,b. tnh +-*/

xut nhp dng textbox

*hm CDbl(bin string): i chuyn thnh s

ex:

DIM a as double

DIM b as double

DIM c as double

a= CDbl(Text1.text)

b= CDbl(Text2.text)

c=a+b

*cstr(sthc): i s>> chui


4/14

text3.text= cstr(c)

3. gii pt bc nht ax+b=0 (a0)

4. gii ptb2 ax^2+bx+c=0

trang 118

tr91, nguyn c thnh, vit tp tin inout.dll dng vc++


5/14

*lnh case: >> lnh c nhiu chn la

select case bin

case gi tr1 to gi tr2

lnh 1

case iu kin/ gi tr

lnh 2

case is iu kin

lnh 3

case else

lnh 4

end select

ex:

select case lng

case 1000 to 2000

heeesothue =0.1

case is > 2000

hesothue = 0.3

case else

hesothue = 0

end select

b. lnh vng lp:

* vng lp for: >> sln lp bit trc


6/14

c php: for bin = gi tr1 to gi tr2

lnh

next

ngha: thc hin lnh vs sln l gtri2-gtri1 + 1, mi ln bin tng ln 1. khi bin > gtri

2 th kt thc vng lp

th d: tnh tng S= 1+2++N

vi N nhp tbn phm

* vng lp while: >> sln lp khng bit trcc php:

do

lnh

loop until/while iu kin

gii thch: chng trnh thc hin t nht mt ln. Khi k ng th thot khi vng lp

s=0

i=1

do

s=s+i

i=i+1

loop until i>N

4. Chng trnh con

- thtc


7/14

- hm

gi thtc >> l mt cu lnh

gi hm >> 1 php gn

* thl=tc

c php:

private sub tn ctc (Byval i s, ByRef i s,)

lnh

end sub

gii thch: CTC bt u l privete sub tn CTC

:

:

end sub

Byval >> truyn theo tr

ByRef>> truyn theo tham chiu (a ch)

i sslu gi trkhi ra khi CTC

vd:

Tm sln hn trong 2 s

to 1 nt nhn. nhn v CT yu cu nhp 2 sa.b

v in ra sln hn

*Hm:

Private Funciton tn CTC (Byval i s,) as kiu

lnh

end funciton


8/14

gt: Hm phi trv1 gi tr, gi trny phi c gin vo chnh tn hm

BT: 5-9 trang 21,22

nng cao 1-4 trang 22, 23.

bi 5: tnh tng S= 1+2+100

b6: vit ctrinh tnh din tch v chu vi ca hnh trn

pi.r^2 / 2piR

b7: to giao din k nhit

b8: vit dng text thc hin thng bo

cho mng cc bn lp DHDT6A

b9: vit ct to giao din tng hp

Nng cao:

1. vit chng trnh to giao din k 8led n chy ui, sng dn, tt dn v 2 ba vo

2. k thang my

3. vit ctrinh to giao din ng ngt cc thit btrong gia nh

4. to giao din k ngiao thng

Private Sub Command1_Click()

Shape1.BackColor = &HFF&

Call Delay(2)


Call Delay(2)


End Sub


9/14

Public Sub Delay(HowLong As Date)

TempTime = DateAdd("s", HowLong, Now)

While TempTime > Now

DoEvents 'Allows windows to handle other stuff

Wend

End Sub


10/14

Bi 2: iu khin qua cng song song

hp ng8086

xut:

mov dx,378h

mov ax,1h

out dx,ax

nhp:

mov dx,379h

in ax,dx

mov data,ax

th d: dng ngn ngC

xut: outportb (0x378,0x1);

nhp: int x;

x=inportb(0x379);


11/14

option Explicit

dim i as integer

dim ltp as integer

private declase sub portout lib io.dll (byval port as integer, byval data as byte)

private declase function portout lib io.dll (byval port as integer) as byte

private sub delay()

dim j as long

for j = 1 to 20 000 000

next

end sub

private sub command1_click()

portout &H378,&H1

delay

portout &H378,&H2

delay

:

:

:

portout &H378,&H80

delay

endsub


12/14

Thc hnh

1. vit ctrinh dieu khien 8led dung cong LPT chy ui, sng dn, tt dn, v 2 bavo ra

2. led matraanj dng at89c51 qua cng LPT

3. ledmatran dung pic qua cng lpt


13/14

bui 4: iu khin led n, lcd qua cng ni tip

1. chp tt led dng portd

2. k 8 led:ui, sng dn, tt daanfm 2 ba vo ra

3. iu khin lcd: hin th: KHOA CN DIEN TU

PHN2: IU KHIN QUA CNG NI TIP

1. KIM TRA KT NI CNG COM GIA PC V PIC : 132

2. IU KHIN 8led n, giao tip my tnh

3. k lcd dng pic, giao tip my tnh qua cng com

bui 6,7:

1. o nhit v hin thgi trADC ln LCD

2. o nhit v hin thmy tnh => tm hm truyn l nhit trang 184-193

3. K on off

4. k tlKp, PID trang 220

bui 8:

1. kho st hhv tm hm truyn ng c DC

2. k on off

quay thun + nghch + start + stop + chy nhanh, chy chm

3. pid s274 + 300bui 9:

1. iu khin vtr gc ng c tr 336

2. k vtr trn thc

Bui 12

Card thu thp dliu v iu khin PCI 1711/ pci 6221

iu khin PLC

1. Tim hiu card PCI 1711 / pci 62212. Ci driver

+ c im ca card PCI 1711/ 6221


14/14

3. iu khin kh nn dng PLC

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Thí Nghiệm Đo Lường Điều Khiển Bằng Máy Tính