Pyvisa 控制万用表
作者：互联网
Pyvisa 控制万用表
是用NI-VISA库和pyvisa 来实现对万用表的控制，该示例使用USB连接万用表
万用表型号为是德科技的34461A
以下为代码原文。
# -*- coding: utf_8 -*-
import os
import time
import pyvisa
import csv
class DMM34461(object):
Measurement_List=[""]
"""docstring for DMM34461"""
def __init__(self):
self.rm = pyvisa.ResourceManager()
self.resource_str=self.rm.list_resources()[0]
print(self.resource_str)
self.Terminals="FRON"
self.ReadBuff=[]
self.idn_list=[]
def Connent_DMM(self,resourceName=""):
if (resourceName!=""):
self.resource_str=resourceName
self.my_instrument=self.rm.open_resource(self.resource_str)
self.my_instrument.read_termination = '\n'
self.my_instrument.write_termination = '\n'
self.ShowInstrumentMessage()
def ShowInstrumentMessage(self):
self.idn_list=self.my_instrument.query("*IDN?").split(",")
print("Manufacturing: {0}".format(self.idn_list[0]))
print("Model: {0}".format(self.idn_list[1]))
print("SN: {0}".format(self.idn_list[2]))
print("Version: {0}".format(self.idn_list[3]))
def ResetDmm(self):
self.my_instrument.write("*RST") # h恢复出厂设置
self.my_instrument.write("*CLS")
ret=self.my_instrument.query("*TST?")
if ret!="+0" :
print("self-test:{0}".format(ret))
else:
print("self-test:PASS")
self.DmmDisplayView('NUMeric')
pass
def ReadConfig(self):
ret=self.my_instrument.query("CONFigure?")
def SetConfig(self,Measurementype,Range="DEF",Resolution="DEF"):
if Measurementype=="CAP":
cmd="CONF:CAP 100".format(Range,Resolution)
self.my_instrument.write(cmd)
ret=self.my_instrument.query("READ?")
def ConfigCurrentParameter(self,Measurementype,Range="DEF",Resolution="DEF"):
CMD="CONFigure:CURRent:{0} {1},{2}".format(Measurementype,Range,Resolution)
print("Config",CMD)
self.my_instrument.write(CMD)
def MeasuremenDIODE(self):
CMD="CONF:DIOD"
self.my_instrument.write(CMD)
def MeasuremenFREQuencyORPERiod(self,Measurementype,Range="DEF",Resolution="DEF"):
Measurementypes=["FREQuency","PERiod","FREQ","PER"]
if Measurementype in Measurementypes:
if Measurementype=="FREQuency" or Measurementype =="FREQ":
CMD="CONFigure:FREQuency {0},{1}".format(Range,Resolution)
self.my_instrument.write(CMD)
elif Measurementype=="PERiod" or Measurementype =="PER":
CMD="CONFigure:PERiod {0},{1}".format(Range,Resolution)
self.my_instrument.write(CMD)
else:
print("Measurementype not support")
def MeasuremenRESistanceORFRESistance(self,Measurementype,Range="DEF",Resolution="DEF"):
Range=str.upper(Range)
RangeNumber_Dic={
"100M": 100000000,
"10M": 10000000,
"1M": 1000000,
"100K": 100000,
"10K": 10000,
"1K": 1000,
"100":0.1}
Measurementypes=["RESistance","FRESistance","RES","FRES"]
if Range in RangeNumber_Dic :
Range=RangeNumber_Dic[Range]
if Measurementype in Measurementypes:
if Measurementype=="RESistance" or Measurementype =="RES":
CMD="CONFigure:RESistance {0},{1}".format(Range,Resolution)
self.my_instrument.write(CMD)
elif Measurementype=="FRESistance" or Measurementype =="FRES":
CMD="CONFigure:FRESistance {0},{1}".format(Range,Resolution)
self.my_instrument.write(CMD)
else:
print("Measurementype not support")
def ConfigVoltageParameter(self,Measurementype,Range="DEF",Resolution="DEF"):
CMD="CONFigure:VOLTage:{0} {1},{2}".format(Measurementype,Range,Resolution)
print("send cmd",CMD)
self.my_instrument.write(CMD)
def CheckTerminals(self,Terminals):
TerminalsTypes=["FRON","REAR"]
Terminals=str.upper(Terminals)
if Terminals in TerminalsTypes:
ret=self.my_instrument.query("ROUTe:TERMinals?")
if self.Terminals==ret:
return True
return False
return False
def Sample(self):
self.my_instrument.write("SAMPle:COUNt 50")
self.my_instrument.write("SAMPle:SOURce TIMer")
def ReadBuff(self):
ret=self.my_instrument.query("READ?",1000)
print("result {0}".format(ret))
def Finish (self):
del self.ReadBuff[:]
pass
def savebufftocsv(self,logpath):
filename = logpath
with open(filename, "w+") as csvfile:
fieldnames = ['Manufacturing Information','Device Model',"Device SN","Version"]
writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
writer.writeheader()
Device_Information={
'Manufacturing Information':self.idn_list[0],
'Device Model':self.idn_list[1],
'Device SN':self.idn_list[2],
'Version':self.idn_list[3],
}
writer.writerow(Device_Information)
with open(filename, "a+") as csvfile:
fieldnames = ["ReadBuff"]
writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
writer.writeheader()
for buff in self.ReadBuff:
print(buff)
writer.writerow({"ReadBuff":buff})
def DmmDisplay(self,displayStr):
CMD="DISPlay {0}".format("ON")
self.my_instrument.write(CMD)
CMD="DISPlay:TEXT:DATA \"{0}\"".format(displayStr)
self.my_instrument.write(CMD)
def DmmDisplayClear(self):
CMD="DISPlay:TEXT:CLEar"
self.my_instrument.write(CMD)
def DmmDisplayView(self,ViewType):
ViewTypes=["NUMeric","HISTogram","TCHart","METer"]
#数字、直方图、趋势图(在 34460A 上不可用)，或条形仪表、
if ViewType in ViewTypes:
CMD="DISPlay:VIEW {0}".format(ViewType)
self.my_instrument.write(CMD)
def SetLimit(self,Limit_Low,Limit_Upp):
self.LimitClea()
CMD="CALCulate:LIM:LOW {0}".format(Limit_Low)
self.my_instrument.write(CMD)
CMD="CALCulate:LIM:UPP {0}".format(Limit_Upp)
self.my_instrument.write(CMD)
def LimitClea(self):
CMD="CALCulate:LIMit:CLEa"
self.my_instrument.write(CMD)
def SetLimitONOFF(self,SetLimitONOFF="OFF"):
LinitStates=["ON","OFF","0","1"]
if SetLimitONOFF in LinitStates:
CMD="CALCulate:LIM:STATe {0}".format(SetLimitONOFF)
self.my_instrument.write(CMD)
def ReadQuestionable(self):
result=self.my_instrument.query("STATus:QUEStionable:CONDition?")
def SetTrigerSource(self,Source):
SourceTypes=["IMMediate","BUS","EXTernal","INTernal"]
if Source in SourceTypes:
self.my_instrument.write("TRIG:SOUR {0}".format(Source))
self.my_instrument.write("TRIG:TRIG:DEL 2")
def SetSampleCount(self,Count):
Cmd="SAMPle:COUNt {0}".format(Count)
self.my_instrument.write(Cmd)
def VoltageMeasuremen(self,VoltageType,Count=50,Range="DEF",Resolution="DEF",LimitLow=0,LimitUpp=0):
print("VoltageMeasuremen parameter error")
Range=str.upper(Range)
VoltageType=str.upper(VoltageType)
RangeNumber_Dic={ "1000V":1000, "100V": 100, "10V": 10, "1V": 1, "100MV":0.1}
Measurementypes=["AC","DC"]
if (VoltageType in Measurementypes) and (Range in RangeNumber_Dic):
self.ConfigVoltageParameter(VoltageType,Range,Resolution)
self.SetTrigerSource("BUS")
self.SetSampleCount(Count)
self.LimitClea()
if LimitLow!=0 and LimitUpp!=0:
self.SetLimit(LimitLow,LimitUpp)
self.SetLimitONOFF("ON")
self.my_instrument.write("INIT")
self.my_instrument.write("*TRG")
self.ReadBuff=self.my_instrument.query("FETC?").split(",")
dmm.savebufftocsv("Voltage.csv")
else:
print("VoltageMeasuremen parameter error")
def CurrentMeasuremen(self,CurrentType,Count=50,Range="DEF",Resolution="DEF"):
print("CurrentMeasuremen",Range,Resolution)
CurrentTypes=["AC","DC"]
RangeNumber_Dic={ "3A":3,"10A":10}
if (CurrentType in CurrentTypes) and (Range in RangeNumber_Dic):
self.ConfigCurrentParameter(CurrentType,Range,Resolution)
self.SetTrigerSource("BUS")
self.SetSampleCount(Count)
self.LimitClea()
self.SetLimitONOFF("OFF")
self.my_instrument.write("INIT")
self.my_instrument.write("*TRG")
self.ReadBuff=self.my_instrument.query("FETC?",5).split(",")
dmm.savebufftocsv("Current.csv")
else:
print("CurrentMeasuremen parameter error")
if __name__ == '__main__':
dmm=DMM34461()
dmm.Connent_DMM()
dmm.ResetDmm()
dmm.Finish()
if dmm.CheckTerminals("FRON"):
dmm.CurrentMeasuremen("DC",Count=5,Range="10A",Resolution=.00001)
dmm.VoltageMeasuremen("DC",200,"10V",0.001,4.5,5.5)
dmm.ReadQuestionable()
print("测量完成")
else:
print("请切换段子")
# dmm.ReadConfig()
# dmm.SetConfig("CAP")
# dmm.MeasuremenCurrentAC(3)
# dmm.MeasuremenCurrentDC(10,0.001)
# dmm.MeasuremenDIODE()
# dmm.MeasuremenFREQuencyORPERiod("FREQ")
# dmm.MeasuremenFREQuencyORPERiod("PER")
# dmm.MeasuremenRESistanceORFRESistance("RES","100")
# dmm.MeasuremenRESistanceORFRESistance("FRES","100")
标签：控制,my,self,CMD,Pyvisa,write,instrument,Range,万用表 来源： https://www.cnblogs.com/jianbingGo/p/16340998.html