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node_lib.py
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node_lib.py
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from homie.node.node_base import Node_Base
from homie.node.property.property_float import Property_Float
from scipy.optimize import curve_fit
import numpy as np
import logging
import yaqc
import time
def gauss(x, mu, std, amp):
z = (x - mu) / (np.sqrt(2) * std)
out = np.exp(-z**2)
return amp * out
class YaqcNode(Node_Base):
def __init__(self, dev, config):
super().__init__(dev, *[config[k] for k in ["id", "name", "type"]])
self.client = yaqc.Client(config["yaqc_port"])
self.units = self.get_units()
measured = self.get_measured()
if not measured: # no dict returned
logging.getLogger(__name__).error(
f"cannot retrieve measurements from Node {self.__class__}"
)
raise ValueError(f"measured: {measured}")
for k in self.units.keys():
self.add_property(
Property_Float(
self,
k.replace("_", "-"),
k,
settable=False,
unit=self.units[k],
value=measured[k]
)
)
def update(self):
try:
measured = self.get_measured()
except Exception as e:
logging.getLogger(__name__).error(e)
return
if not measured:
return
for k in self.units.keys():
self.set_property_value(k.replace("_", "-"), measured[k])
def get_units(self):
...
def get_measured(self):
...
class Millennia(YaqcNode):
def get_units(self):
return self.client.get_channel_units()
def get_measured(self) -> dict:
m_id = self.client.get_measurement_id()
self.client.measure()
start = time.time()
while time.time() - start < 3:
time.sleep(0.1)
if self.client.get_measurement_id() != m_id:
measured = self.client.get_measured()
if measured["shg_temp"] < 10**4:
logging.getLogger(__name__).error(f"Measurement channels are out of order: {measured}")
logging.getLogger(__name__).info("attempting extra read")
self.client.extra_scpi_read()
return self.get_measured()
return measured
self.client.shutdown(True)
raise TimeoutError
class Tsunami(YaqcNode):
units = {
"amp": "# MHz",
"mu": "cm-1",
"area": "# cm-1 MHz",
"fwhm": "cm-1",
"ier": None,
"rms": None,
"relative-amp": None,
"relative-mu": None,
"relative-area": None,
"relative-fwhm": None,
"relative-rms": None,
}
def __init__(self, dev, config):
self.create_reference(config["reference_path"], config["reference_time_us"])
# self.client.measure(True) # ensure looping is on
super().__init__(dev, config)
def get_units(self):
return self.units
def get_measured(self) -> dict:
nm = self.client.get_mappings()["wavelengths"]
y = self.client.get_measured()["intensities"]
self.time_us = self.client.get_integration_time_micros()
p_out = self._fit_gauss(nm, y / self.time_us)
p_out |= {
f"relative-{k}": p_out[k] / self.reference[k] \
for k in p_out.keys() if k not in ["ier"]
}
return p_out
def _fit_gauss(self, nm, y):
inds = [np.argmin(np.abs(nm-725)), np.argmin(np.abs(nm-875))]
sl = slice(min(inds), max(inds), None)
x = 1e7 / nm[sl]
y = y[sl]
p0 = [x[np.argmax(y)], 350., y.max()]
try:
p, cov, infodict, mesg, ier = curve_fit(gauss, x, y, p0, full_output=True)
except Exception as e:
logging.getLogger(__name__).error(e)
return {}
rms = ((gauss(x, *p) - y)**2).sum()
rms /= x.size
rms **= 0.5
return dict(
mu = p[0],
fwhm = p[1] * 2.35,
amp = p[2],
area = np.sum(y),
rms = rms,
ier = ier,
)
def create_reference(self, path, time):
nm, y = np.genfromtxt(path, unpack=True, skip_header=14, skip_footer=1)
logging.getLogger(__name__).info(f"nm {nm}")
self.reference = self._fit_gauss(nm, y / time)