class ThermoCouple(Sensor):
'''Class used to handle any thermcouple data '''
def __init__(self,
deviceSN,
channelNo,
dataInterval,
refreshPeriod,
sensorType,
sensorName=None):
'''
Constructor for creating thermcouple sensors. Takes standard sensor
arguments. Sensor type here is enum for different thermcouples. J,K,E and
T types are represented by 1,2,3,4.
'''
self.channelNo = channelNo
self.sensorType = sensorType
self.sensorUnits = None
Sensor.__init__(self, deviceSN, dataInterval, refreshPeriod,
sensorName)
def attachSensor(self):
'''
Connects the sensor to the application
'''
self.channel = TemperatureSensor()
self.channel.setDeviceSerialNumber(self.deviceSN)
self.channel.setChannel(self.channelNo)
self.channel.openWaitForAttachment(100)
print("\n***** {} Sensor Attached *****".format(self.sensorName))
self.attached = True
self.channel.setThermocoupleType(self.sensorType)
self.channel.setDataInterval(self.dataInterval)
self.sensorUnits = "degrees C"
def activateDataListener(self):
'''
Sets up the event which triggers when the sensor updates its outputs
'''
self.startTime = time.time()
def onTempChange(channelObject, temp):
rawTime = time.time()
deltaTime = rawTime - self.startTime
self.dataQ.put([temp, deltaTime, rawTime])
self.channel.setOnTemperatureChangeHandler(onTempChange)
class IRTemperatureSensor(Sensor):
'''
Class for connecting to Phidget IR temperature sensors. Extends base Sensor class
'''
def __init__(self, deviceSN, dataInterval, refreshPeriod, sensorName=None):
'''
Constructor for IR Temp class. Takes same arguments as Sensor
'''
Sensor.__init__(self, deviceSN, dataInterval, refreshPeriod,
sensorName)
self.sensorUnits = "Degrees C"
def attachSensor(self):
'''
Connects sensor to application. Sets the "channel" parameter which is the
handle to the phidget
'''
self.channel = TemperatureSensor()
self.channel.setDeviceSerialNumber(self.deviceSN)
self.channel.setChannel(0)
self.channel.openWaitForAttachment(5000)
print("***** {} Sensor Attached *****".format(self.sensorName))
self.attached = True
self.channel.setDataInterval(self.dataInterval)
def activateDataListener(self):
'''
Sets up the event which triggers when the sensor updates its output values
'''
self.startTime = time.time()
def onTemperatureChange(channelObject, temperature):
# logs time and sensor value to the thread safe dataQ
rawTime = time.time()
deltaTime = rawTime - self.startTime
self.dataQ.put([temperature, deltaTime, rawTime])
self.channel.setOnTemperatureChangeHandler(onTemperatureChange)