如何用python控制示波器_python 操作TK示波器

桃扇骨 2022-10-28 11:28 299阅读 0赞

1 importmatplotlib.pyplot as plt2 importvisa3 importtime4 from datetime import datetime \#std library

6 classTektronix\_MSO64:7 def \_\_init\_\_(self):8 visa\_dll = 'c:/windows/system32/visa32.dll'

9 self.rm =visa.ResourceManager()10 \#res = rm.list\_resources()

11 \#print(rm)

12 \#print(res)

13 self.inst = self.rm.open\_resource('USB0::0x0699::0x0528::C019161::INSTR')14 \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#

15 self.inst.write("\*IDN?")16 print(self.inst.read())17 self.inst.write('CLEAR')18 self.inst.write('ACQuire:MODe?')19 print(self.inst.read())20 self.inst.timeout = 25000

21 self.inst.write('ACQUIRE:STOPAFTER RUNSTOP')22 self.inst.write('ACQuire:STATE RUN')23

25 def set\_HORIZONTAL(self,POSITION,SCALE):\#HORIZONTAL position,HORIZONTAL scale /us

26 self.inst.write('HORIZONTAL:POSITION %s'%POSITION)27 self.inst.write('HORIZONTAL:SCALE %se-6'%SCALE)28

29 def open\_ch(self,ch):\#关闭相应通道

30 self.inst.write('DISplay:GLObal:CH%s:STATE ON'%ch)31

32 def close\_ch(self,ch):\#打开相应通道

33 self.inst.write('DISplay:GLObal:CH%s:STATE OFF'%ch)34

35 def vertical\_ch(self,ch,scale,position):\#通道，ch scale/mv，ch POSition，

36 self.inst.write('CH%s:BANDWIDTH FULl'%ch)\#at its maximum bandwidth

37 self.inst.write('CH%s:SCAle %sE-3'%(ch,scale))38 self.inst.write('CH%s:POSition %s'%(ch,position))39 self.inst.write('CH%s:COUPLING DC'%ch)\#直流

40 self.inst.write('CH%s:TERMINATION 10.0E+5'%ch)\#1兆欧

42 def trigger\_set(self,ch,level):\#通道，触发电压

43 self.inst.write('TRIGGER:A:EDGE:COUPLING DC')\#边沿触发

44 self.inst.write('TRIGGER:A:EDGE:SOURCE CH%s'%ch)45 self.inst.write('TRIGGER:A:EDGE:SLOPE RISE')\#上升沿触发

46 self.inst.write('TRIGGER:A:LEVEL:CH4 %s'%level)47

48 def begin\_trigger(self):\#开启一次触发

49 self.inst.write('ACQuire:STOPAfter SEQuence')50 while 1:\#等触发了才借宿

51 time.sleep(1)52 self.inst.write('TRIGGER:STATE?')53 TRIGGER\_STATE =self.inst.read()54 if TRIGGER\_STATE\[0\] == "S":55 print('have triggered')56 break

58 def data\_caul(self,ch):\#通道

59 self.inst.write('DATA:SOURCE CH%s'%ch)60 self.inst.write('DATa:ENCdg ASCIi')61 self.inst.write('WFMOUTPRE:BYT\_NR 4')62 self.inst.write('DATA:START 1')63 self.inst.write('DATA:STOP 250e6')64 self.inst.write('WFMOUTPRE?')65 preamble=self.inst.read()66 \#获取HORIZONTAL:POSITION

67 self.inst.write('HORIZONTAL:POSITION?')68 HORIZONTAL\_p=self.inst.read()69 HORIZONTAL\_pfloat=float(HORIZONTAL\_p)70 \#获取HORIZONTAL:SCALE

71 self.inst.write('HORIZONTAL:SCALE?')72 HORIZONTAL\_S=self.inst.read()73 HORIZONTAL\_Sfloat=float(HORIZONTAL\_S)74 \#获取ch POSition

75 self.inst.write('CH%s:POSition?'%ch)76 divus\_str =self.inst.read()77 divus\_float =float(divus\_str)78 \#获取ch SCAle

79 self.inst.write('CH%s:SCAle?'%ch)80 div\_str =self.inst.read()81 div\_float =float(div\_str)82 \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#获取采样点数目

83 j=084 point\_str=' '

85 for i inrange(0,len(preamble)):86 if preamble\[i\]==',':87 j+=1

88 elif j==4:89 point\_str=point\_str+preamble\[i\]90 elif j==5:91 point\_len=len(point\_str)92 point\_str=point\_str\[2:(point\_len-6)\]93 break

94 point\_int=int(point\_str)95 print('point\_num：%d'%point\_int)96 \#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#\#数据处理

97 data = self.inst.query('CURVE?')98 x =\[\]99 dat = \[' '\]100 dat1 =\[\]101 j =0102 for i inrange(0, len(data)):103 if data\[i\] == ',':104 dat1.append(float(dat\[j\])/32000\*div\_float\*5-div\_float\*divus\_float)105 x.append((int(j)/point\_int\*HORIZONTAL\_Sfloat\*10-HORIZONTAL\_Sfloat\*10\*HORIZONTAL\_pfloat/100))106 j += 1

107 dat.append(' ')108 else:109 dat\[j\] = dat\[j\] +data\[i\]110 plt.plot(x, dat1)111

112 defclose(self):113 self.inst.close()114 self.rm.close()115

116 defget\_screen(self):117 self.inst.write('SAVE:IMAGE "E:/waveform\_screen.bmp"')118 time.sleep(1)119 self.inst.write('FILESYSTEM:READFILE "E:/waveform\_screen.bmp"')120 img =self.inst.read\_raw()121 dt =datetime.now()122 fileName = dt.strftime("%Y%m%d\_%H%M%S.bmp") \#以当前时间建立文件名

123 imgFile = open('./waveform/' + fileName, "wb") \#打开图片文件，如果没有就会新建一个

124 imgFile.write(img)125 imgFile.close()126 self.inst.write('FILESYSTEM:DELETE "E:/waveform\_screen.bmp"')127

128

129

130

131

132 if \_\_name\_\_ == "\_\_main\_\_":133 fig =plt.figure()134 my=Tektronix\_MSO64()135 my.set\_HORIZONTAL(10,200)136 my.open\_ch(4)137 my.open\_ch(3)138 my.open\_ch(2)139 my.open\_ch(1)140 my.vertical\_ch(4,2000,1)141 my.vertical\_ch(3,2000,2)142 my.vertical\_ch(2,2000,2)143 my.vertical\_ch(1,2000,2)144 my.trigger\_set(4,2)145 my.begin\_trigger()146 my.data\_caul(4)147 my.data\_caul(3)148 my.data\_caul(2)149 my.data\_caul(1)150 my.get\_screen()151 plt.show()152 my.close()