光伏电池测控系统python代码

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硬件keithley万用表和程控电源
visa是VXIplug&play系统联盟制定的一套标准。
python实现VISA，形成pyviva模块
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###IV测试系统的部分程序代码 
from visa import * 
from string import * 
from math import * 
class CurrentMiter(Instrument): 
    CurrentValue=[] 
    datapoints=1 
    Atrr="" 
    def __init__(self,DelayTime=0.2,DPs=111): 
        self=instrument("GPIB::23") 
        self.timeout=30 
        datapoints=DPs 
        self.delay=DelayTime  
         
        self.write("*Rst") 
        self.write(":SYST:PRES") 
        self.write(":FORM:DATA ASCII") 
        self.write(":TRIgger:delay 0") 
        self.write(":trigger:source external") 
        self.write(":INITiate:CONTinuous On") 
        self.write(":trigger:count 1") 
        self.write(":Data:clear") 
        self.write(":data:points %d" % datapoints) 
        self.write(":data:feed:control next") 
        self.write(":data:feed sense") 
        self.write(":FUNC ‘CURRent:DC‘") 
        self.write(":CURRent:DC:RANGe:Auto 1") 
        self.write(":CURRent:DC:DIGits 7") 
        self.write(":CURRent:DC:AVERage:STATe off") 
    def newAsk(self,cmd): 
        return self.ask_for_values(cmd) 
 
class SourceGenerator(Instrument): 
    VRangeSelect="" 
    VStart=1 
    VStop=0 
    VStep=1 
    TimeStep=1 
    def __init__(self,DelayTime=0.2,V0=1.0,Vt=-0.1,Vs=0.01,Ts=0.1,Vr=4):   146
        self=instrument("GPIB::1") 
        self.delay=DelayTime  
        self.VRangeSelect=Vr  
        self.VStart=V0 
        self.VStop=Vt  
        self.VStep=Vs 
        self.TimeStep=Ts 
        self.write("C") 
        self.write("RP1") 
        self.write("PM2") 
        self.write("V%s" % str(self.VRangeSelect)) 
        cmd="SP"+str(self.TimeStep)+"SN"+str(self.VStart)+","+str(self.VStop)+","+str(self.VStep)+ " ST0" 
        self.write(cmd) 
        Points=abs((self.VStop - self.VStart)/ (self.VStep))+1 
        K2000=CurrentMiter(0.2,Points) 
        self.write("E") 
        self.write("*CLS ISE1 *SRE8 S0") 
        self.write("*TRG") 
        self.wait_for_srq()  
##主程序 
from IVKeithley import * 
from IVSource import * 
from visa import * 
if __name__ ="__main__":
    Keithley=CurrentMiter(0.1,10) 
    Source=SourceGenerator(0.2) 
    Source.StartTest() 
    Source.write("*TRG") 
    #Source.write("H")