如何用python控制示波器_python 操作TK示波器

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

5

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

24

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

41

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

57

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()