public static BackgroundWorker InitializePressureWorker(ArduinoDriver.ArduinoDriver driver, Dispatcher MainDispatcher)
{
PressureWorker = new BackgroundWorker();
PressureWorker.WorkerSupportsCancellation = true;
PressureWorker.DoWork += new DoWorkEventHandler((state, args) =>
{
//Make sure the pump is off
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.VacuumPump); }));
Main.VacuumPumpOn = false;
do
{
try
{
if (Main.Run != true || PressureWorker.CancellationPending == true)
{
break;
}
System.Threading.Thread.Sleep(1000);
if (Convert.ToDouble(Main.Pressure) > SystemProperties.TargetPressure && Main.VacuumPumpOn == false)
{
//Turn the vacuum pump on
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOn(driver, SystemProperties.VacuumPump); }));
Main.VacuumPumpOn = true;
//Refresh the pressure has changed every second -- Note that the pressure is set in the still monitor background worker
do
{
System.Threading.Thread.Sleep(1000);
}while (Convert.ToDouble(Main.Pressure) > (SystemProperties.TargetPressure - SystemProperties.TgtPresHysteresisBuffer) && PressureWorker.CancellationPending == false);
//Once the pressure has reached its target turn the pump off
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.VacuumPump); }));
Main.VacuumPumpOn = false;
}
}
catch { MainDispatcher.Invoke(new Action(() => { driver = Periphrials.InitializeArduinoDriver(); })); }
} while (true);
});
return(PressureWorker);
}
public void StillLoop()
{
//Dispatcher to accept commands from the various background workers
Dispatcher MainDispatcher = Dispatcher.CurrentDispatcher;
//Instanciate the periphrial class and start up the arduino
ArduinoDriver.ArduinoDriver driver = Periphrials.InitializeArduinoDriver();
if (driver == null)
{
lblStatus.Text = "No controller found";
btnRescan.Visible = true;
}
else
{
btnRescan.Visible = false;
lblStatus.Text = "Starting";
}
//Declare the background workers
SystemMonitor = BackGroundWorkers.InitializeSystemMonitor(driver, MainDispatcher);
PressureRegulator = BackGroundWorkers.InitializePressureWorker(driver, MainDispatcher);
//StillController;
FanController1 = BackGroundWorkers.InitializeFanController1(driver, MainDispatcher);
FanController2 = BackGroundWorkers.InitializeFanController2(driver, MainDispatcher);
//Datatable for statistics and calculating when to turn the element off
DataTable StillStats = Statistics.InitializeTable();
chartRun.DataSource = StillStats;
StillController = new BackgroundWorker();
StillController.WorkerSupportsCancellation = true;
StillController.DoWork += new DoWorkEventHandler((state, args) =>
{
do
{
try {
DateTime RunStart = DateTime.Now;
StillStats.Clear();
//Run unless a stop condition is hit
if (Run != true || driver == null)
{
break;
}
while (Phase == -1)//Wait for initial values to be collected before starting
{
System.Threading.Thread.Sleep(250);
}
//Check to see if the still is full, if not fill it. This ensures there is no product wasted if the previous batch was stopped half way
if (StillFull == false && Phase < 2)
{
{
//Open the inlet valve and turn the inlet pump on
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOn(driver, SystemProperties.StillFillValve); }));
StillValveOpen = true;
//Wait 5 seconds for the valve to open
System.Threading.Thread.Sleep(3000);
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOn(driver, SystemProperties.StillFluidPump); }));
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Filling Still"; }));
StillPumpOn = true;
//Check once a second to see if the still is full now -- note that StillFull is updated by the monitor worker
while (StillFull == false)
{
System.Threading.Thread.Sleep(1000);
}
//Close the valve and turn off the pump
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.StillFillValve); }));
StillValveOpen = false;
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.StillFluidPump); }));
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Filling Complete"; }));
StillPumpOn = false;
//If this line is reached that means the still has liquid in it and is ready to start distilling
Phase = 1;
}
}
//Make sure the first loop was passed and the still didnt magically empty itself
if (Phase < 2 && StillFull == true)
{
//Turn on the element and vacuum pump
DriverFunctions.TurnOn(driver, SystemProperties.StillElement);
ElementOn = true;
PressureRegulator.RunWorkerAsync();
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Heating"; }));
//Set up variables for calculating when to turn off the element
int CurrentTemp = Convert.ToInt16(ColumnTemp);
int CurrentDelta = 0;
int Counter = 0;
PlateauTemp = 0;
string StartTempRaw = null;
while (StartTempRaw == null)
{
try { StartTempRaw = driver.Send(new AnalogReadRequest(SystemProperties.SensorColumnTemp)).PinValue.ToString(); } catch { }
}
double StartTemp = Convert.ToInt64((((Convert.ToDouble(StartTempRaw) * (5.0 / 1023.0)) - 1.25) / 0.005));
double Temp1 = 0.0;
double Temp2 = 0.0;
double AverageDelta = 0.0;
double TotalDelta = 0.0;
DataRow row;
row = StillStats.NewRow();
row["Time"] = DateTime.Now;
row["Temperature"] = CurrentTemp;
row["TemperatureDelta"] = 0;
row["Pressure"] = Convert.ToDecimal(Pressure);
row["Phase"] = Phase;
row["Amperage"] = ElementAmperage;
row["RefluxTemperature"] = RefluxTemp;
row["CondensorTemperature"] = CondensorTemp;
StillStats.Rows.Add(row);
//Get the last written row for collecting temperature rise statistics
DataRow LastRow = StillStats.Rows[0];
//Get two rows from two points in time 2.5 minutes apart so an average temperature change can be obtained from the given time span
DataRow Delta1;
DataRow Delta2;
//Start both fan controllers to maintain the temperature of the coolant in Reflux column and the Condensor
//Note that these are started here because they are auto-regulating and will shut off by themselves when not necessary
//FanController1.RunWorkerAsync();
//FanController2.RunWorkerAsync();
//Keep the element on and keep collecting data every 10 seconds until the first plateau is reached then go to the next loop
//note thate the total delta is there incase it takes longer than 10 minutes to start seeing a temperature rise at the sensor
while ((StillEmpty == false && AverageDelta >= 0.02) || TotalDelta < 0.25)
{
//Change this back to 10 seconds
System.Threading.Thread.Sleep(250);
//Once the element has been on for 10 minutes start checking for the plateau
if (Counter < 60)
{
Counter = Counter + 1;
}
else
{
Delta1 = StillStats.Rows[StillStats.Rows.Count - 19];
Delta2 = StillStats.Rows[StillStats.Rows.Count - 1];
Temp1 = Delta1.Field <Int32>("Temperature");
Temp2 = Delta2.Field <Int32>("Temperature");
AverageDelta = Temp2 != 0 ? ((Temp2 - Temp1) / Temp2) : 0;
if (Temp2 > Temp1)
{
TotalDelta = Temp2 != 0 ? ((Temp2 - StartTemp) / Temp2) : 0;
}
}
CurrentTemp = Convert.ToInt32(ColumnTemp);
CurrentDelta = CurrentTemp - LastRow.Field <Int32>("Temperature");
row = StillStats.NewRow();
row["Time"] = DateTime.Now;
row["Temperature"] = CurrentTemp;
row["TemperatureDelta"] = CurrentDelta;
row["Pressure"] = Convert.ToDecimal(Pressure);
row["Phase"] = Phase;
row["Amperage"] = ElementAmperage;
row["RefluxTemperature"] = RefluxTemp;
row["CondensorTemperature"] = CondensorTemp;
StillStats.Rows.Add(row);
LastRow = StillStats.Rows[StillStats.Rows.Count - 1];
MainDispatcher.Invoke(new Action(() => { chartRun.DataBind(); }));
}
//Prep variables related to the distillation phase and start the fan controller for the condensor
Phase = 2;
AverageDelta = 0;
TotalDelta = 0;
PlateauTemp = LastRow.Field <Int32>("Temperature");
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Distilling"; }));
//Once the first plateau is reached allowing for a 4 degree change at the most
//or end the batch if the saftey limit switch is triggered also reset the Delta counters so the next step is not skipped
while (StillEmpty == false && (Temp2 - PlateauTemp) < 5 && RVFull == false)
{
Delta1 = StillStats.Rows[StillStats.Rows.Count - 19];
Delta2 = StillStats.Rows[StillStats.Rows.Count - 1];
Temp1 = Delta1.Field <Int32>("Temperature");
Temp2 = Delta2.Field <Int32>("Temperature");
AverageDelta = Math.Abs(((Temp2 - Temp1) / Temp2));
System.Threading.Thread.Sleep(250); //Change this back to 10 seconds
CurrentTemp = Convert.ToInt32(ColumnTemp);
CurrentDelta = CurrentTemp - LastRow.Field <Int32>("Temperature");
row = StillStats.NewRow();
row["Time"] = DateTime.Now;
row["Temperature"] = CurrentTemp;
row["TemperatureDelta"] = CurrentDelta;
row["Pressure"] = Convert.ToDecimal(Pressure);
row["Phase"] = Phase;
row["Amperage"] = ElementAmperage;
row["RefluxTemperature"] = RefluxTemp;
row["CondensorTemperature"] = CondensorTemp;
StillStats.Rows.Add(row);
LastRow = StillStats.Rows[StillStats.Rows.Count - 1];
MainDispatcher.Invoke(new Action(() => { chartRun.DataBind(); }));
}
//Batch complete!
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Batch Complete, Saving Run Data"; }));
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.StillElement); }));
ElementOn = false;
Phase = 3;
}
//If the run completed without issue then calculate the header info and write the data to a local sqldb
//Note that this must be done sequentially as the records must relate to a header record
//Once the table is succesfully written set the phase back to 0 and start another run
if (Phase == 3)
{
Statistics.CreateHeader(RunStart, DateTime.Now, true, SystemProperties.Units);
Statistics.SaveRun(StillStats, RunStart);
//Turn off the vacuum pump and fan controllers synchronously with the main thread
PressureRegulator.CancelAsync();
//FanController1.CancelAsync();
//FanController2.CancelAsync();
while (PressureRegulator.CancellationPending == true || FanController1.CancellationPending == true || FanController2.CancellationPending == true)
{
System.Threading.Thread.Sleep(100);
}
//Fill the system with air so it is at a neutral pressure before pumping any fluids -- note that the system will pull air from the drain valve
//since it eventually vents somewhere that is at atmospheric pressure
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOn(driver, SystemProperties.StillDrainValve); }));
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Draining Still"; }));
while (StillEmpty == false || Convert.ToDouble(Pressure) <= -0.2)
{
System.Threading.Thread.Sleep(1500);
}
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.StillDrainValve); }));
System.Threading.Thread.Sleep(3000);
//Make sure that the switches are working then pump the Recieving vessels contents into a storage tank so the next run can begin
MainDispatcher.Invoke(new Action(() => { lblStatus.Text = "Draining Distillate"; }));
MainDispatcher.Invoke(new Action(() => { RVEmpty = (driver.Send(new DigitalReadRequest(SystemProperties.RVEmptySwitch)).PinValue == DigitalValue.Low) ? true : false; }));
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOn(driver, SystemProperties.RVDrainValve); }));
System.Threading.Thread.Sleep(3000); //3 second delay so the valve has time to open
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOn(driver, SystemProperties.RVFluidPump); }));
while (RVEmpty == false)
{
//MainDispatcher.Invoke(new Action(() => { RVEmpty = (driver.Send(new DigitalReadRequest(SystemProperties.RVEmptySwitch)).PinValue == DigitalValue.Low) ? true : false; }));
System.Threading.Thread.Sleep(1500);
}
//Turn off the pump and shut the valves and give them 3 seconds to close
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.RVFluidPump); }));
MainDispatcher.Invoke(new Action(() => { DriverFunctions.RelayOff(driver, SystemProperties.RVDrainValve); }));
Phase = 0;
}
}
//The arduino driver reference has a tendency to randomly throw null reference exceptions, for now I will handle it by just restarting the arduino
//the code is designed to pick up where it left off if it errors since the phase is still in memory
catch (NullReferenceException)
{
MainDispatcher.Invoke(new Action(() => { driver = Periphrials.InitializeArduinoDriver(); }));
}
} while (true);
});
UIUpdater = new BackgroundWorker();
UIUpdater.WorkerSupportsCancellation = true;
UIUpdater.DoWork += new DoWorkEventHandler((state, args) =>
{
do
{
System.Threading.Thread.Sleep(1000);
MainDispatcher.Invoke(new Action(() => { lblPressure.Text = Main.Pressure + ((SystemProperties.Units == "Metric") ? "kPa" : "PSI"); }));
MainDispatcher.Invoke(new Action(() => { lblTemp1.Text = Main.ColumnTemp + ((SystemProperties.Units == "Metric") ? "°C" : "°F"); }));
}while (true);
});
//Start the workers and pause for 2 seconds to allow for initial values to be collected
SystemMonitor.RunWorkerAsync();
System.Threading.Thread.Sleep(2000);
StillController.RunWorkerAsync();
UIUpdater.RunWorkerAsync();
}