def calcRL(self):
msg = 'fit failed. please acquire some data first'
if self.xdata is not None:
start, end = self.region.getRegion()
leftIndex = (np.abs(self.xdata * 1e-3 - start)).argmin()
rightIndex = (np.abs(self.xdata * 1e-3 - end)).argmin()
from expeyes import eyemath17
self.p.I.set_state(
OD1=1
) # Do some DC work to find the resistance of the Inductor
time.sleep(.5)
Rext = float(self.res.value())
vtotal = 5.0 # Assume OD1 = 5 volts
v = self.p.I.get_voltage('A2')
if v > 4.8: # Means user has connected OD1 to A2
vtotal = v
Vind = self.p.I.get_voltage('A1') # voltage across the Inductor
i = (vtotal - Vind) / Rext
Rind = Vind / i
fa = eyemath17.fit_exp(self.xdata[leftIndex:rightIndex],
self.ydata[leftIndex:rightIndex])
if fa != None:
pa = fa[1]
par1 = abs(1.0 / pa[1])
msg = u'L/R = %5.3f mSec\nRind = %5.0f \u03A9\nL = %5.1f mH' % (
par1, Rind, (Rext + Rind) * par1)
fitcurve = self.addCurve(
self.plot, '%s_%5.2fmS' % (self.curve.name(), par1),
'#fff')
fitcurve.setData(self.xdata[leftIndex:rightIndex] * 1e-3,
fa[0])
else:
msg = 'Failed to fit the curve with V=Vo*exp(-t/RC)'
QtGui.QMessageBox.information(self, 'Fit Results', msg)
def fit_curve():
global data
fa = eyemath.fit_exp(data[0], data[1])
if fa != None:
pa = fa[1]
rc = abs(1.0 / pa[1])
g.line(data[0],fa[0],1)
dispmsg(_('RC = %5.2f mSec')%rc)
else:
dispmsg(_('Failed to fit the curve with V=Vo*exp(-t/RC)'))
def fit_curve():
global data, running
if running == True or len(data[0])==0:
return
f = eyemath.fit_exp(data[0], data[1])
if f != None:
g.line(data[0], f[0], 1)
k = 1.38e-23 # Boltzmann const
q = 1.6e-19 # unit charge
Io = f[1][0]
a1 = f[1][1]
T = 300.0 # Room temp in Kelvin
n = q/(a1*k*T)
s = _('Fitted with Diode Equation : Io = %5.2e mA , Ideality factor = %5.2f')%(Io,n)
msg.config(text = s)
def calcRC(self):
msg = 'fit failed. please acquire some data first'
if self.xdata is not None:
start, end = self.region.getRegion()
leftIndex = (np.abs(self.xdata * 1e-3 - start)).argmin()
rightIndex = (np.abs(self.xdata * 1e-3 - end)).argmin()
from expeyes import eyemath17
print start, end, leftIndex, rightIndex
fa = eyemath17.fit_exp(self.xdata[leftIndex:rightIndex],
self.ydata[leftIndex:rightIndex])
if fa != None:
pa = fa[1]
rc = np.abs(1.0 / pa[1])
msg = 'RC time constant = %5.2f mSec\nNew curve (%s_%5.2fmS) overlaid' % (
rc, self.curve.name(), rc)
fitcurve = self.addCurve(
self.plot, '%s_%5.2fmS' % (self.curve.name(), rc), '#fff')
fitcurve.setData(self.xdata[leftIndex:rightIndex] * 1e-3,
fa[0])
else:
msg = 'Failed to fit the curve with V=Vo*exp(-t/RC)'
QtGui.QMessageBox.information(self, 'Fit Results', msg)
def fit_curve():
global data
p.set_state(
OD1=1) # Do some DC work to find the resistance of the Inductor
time.sleep(.5)
Rext = float(Res.get())
vtotal = 5.0 # Assume OD1 = 5 volts
v = p.get_voltage('A2')
if v > 4.8: # Means user has connected OD1 to A2
vtotal = v
Vind = p.get_voltage('A1') # voltage across the Inductor
i = (vtotal - Vind) / Rext
Rind = Vind / i
fa = eyemath.fit_exp(data[0], data[1])
if fa != None:
pa = fa[1]
par1 = abs(1.0 / pa[1])
g.line(data[0], fa[0], 1)
dispmsg(
_('L/R = %5.3f mSec : Rind = %5.0f Ohm : L = %5.1f mH') %
(par1, Rind, (Rext + Rind) * par1))
else:
dispmsg(_('Failed to Fit. Try fitting V=Vo*exp(-tR/L) with Xmgrace'))
def fit_curve(self):
msg = 'fit failed. please acquire some data first'
if self.xdata is not None and self.activeCurve is not None:
from expeyes import eyemath17
f = eyemath17.fit_exp(self.xdata, self.ydata)
if f != None:
k = 1.38e-23 # Boltzmann const
q = 1.6e-19 # unit charge
Io = f[1][0]
a1 = f[1][1]
T = 300.0 # Room temp in Kelvin
n = q / (a1 * k * T)
msg = 'Fitted with Diode Equation :\nIo = %s\nIdeality factor = %5.2f' % (
self.applySIPrefix(Io, 'A', 2), n)
fitcurve = self.addCurve(
self.plot,
'%s\n%s\nIF=%5.1f' % (self.activeCurve.name(),
self.applySIPrefix(Io, 'A', 2), n),
'#fff')
fitcurve.setData(self.xdata, f[0])
else:
msg = 'Failed to fit the curve '
QtGui.QMessageBox.information(self, 'Fit Results', msg)