/// <summary>
/// Monitors the flow rate and adjustes voltage to pump as necessary in
/// order to maintain desired flowrate.
/// </summary>
protected override void Run()
{
try
{
if (!Pump.IsRunning())
{
return;
}
ConsoleState state = Master.ConsoleService.CurrentState;
if (state == ConsoleState.Diagnosing || state == ConsoleState.InteractiveDiagnostics)
{
return;
}
int openedPosition = Pump.GetOpenValvePosition();
if (openedPosition > 0)
{
DateTime openTime = Pump.GetTimePumpStarted();
DateTime now = DateTime.UtcNow;
Log.Debug(string.Format("Opened solenoid {0} at {1}", Pump.GetOpenValvePosition(), Log.DateTimeToString(openTime)));
Pump.FlowStatus flowStatus = Pump.CheckFlow();
if (flowStatus != Pump.FlowStatus.TooLow)
{
_flowFailures = 0;
if ((openTime != DateTime.MinValue) && ((now - openTime) > _periodAllowedOpen))
{
Pump.CloseValve(openedPosition); // Close the valve.
}
}
// Else, assumption is that FlowStatus is TooLow. (empty cylinder?)
else if (((now - openTime) > _minOpenPeriod) &&
Pump.IsRunning())
{
_flowFailures++;
Log.Debug("Flow failed " + _flowFailures + " times.");
if (_flowFailures >= _MIN_FLOW_FAILURES)
{
_flowFailures = 0;
Pump.CloseValve(openedPosition);
}
else
{
Pump.OpenValve(Pump.GetOpenValvePosition(), false);
}
}
}
}
catch (Exception e)
{
Log.Error(Name, e);
}
}
/// <summary>
/// Test the specified solenoid
/// </summary>
/// <param name="details">The string to hold details.</param>
private void TestFlow( DetailsBuilder details, int solenoid )
{
// Validate the solenoid number
if ( solenoid < 1 || solenoid > Configuration.DockingStation.NumGasPorts )
{
Log.Debug( "TestFlow: Invalid solenoid value = " + solenoid.ToString() );
return;
}
Log.Debug( "TestFlow: port=" + solenoid.ToString() );
// Determine whether a cylinder is attached to this port.
// If there is one attached, skip this test.
DockingStation ds = Controller.GetDockingStation();
GasEndPoint gasEndPoint = ds.GasEndPoints.Find(m => m.Position == solenoid);
if (gasEndPoint != null && gasEndPoint.Cylinder.IsFreshAir == false)
{
Log.Debug( "TestFlow: Cylinder attached to port " + solenoid.ToString() + "; SKIPPING THIS TEST." );
return;
}
Pump.DoCheckFlow = true;
// Ensure that only the specified solenoid is open.
Pump.CloseAllValves( true );
Thread.Sleep(500); // Give the valves a chance to finish closing
Pump.OpenValve(solenoid, false); // Open the specified solenoid
Thread.Sleep(500); // Pause at least 500ms.
Pump.SetDesiredFlow( Pump.StandardFlowRate);
Pump.Start( Pump.StandardStartVoltage ); // Turn on the pump.
Thread.Sleep( 3000 ); // Wait for it to stabilize the flow before letting CheckFlow take its first reading.
// CheckFlow could enter an infinite loop if it's unable to
// establish the desired flow rate and we don't tell it to time out.
// We therefore give it a time out of a minute which should be more than sufficient.
ushort rawFlowCounts;
ushort rawVacuumCounts;
Pump.FlowStatus flowStatus = Pump.CheckFlow( new TimeSpan( 0, 1, 0 ), out rawFlowCounts, out rawVacuumCounts );
byte pumpVoltage = Pump.GetPumpVoltage(); // obtain and hold onto final voltage of the pump, to report it to inet.
// Get the flow rate.
ushort flowVolts = Pump.ConvertRawFlowToVolts( rawFlowCounts );
int flowRate = Pump.CalculateFlowRate( flowVolts, rawVacuumCounts ); // Convert that value to mL/min
// Report the results.
string flowString = BuildFlowString(flowRate, flowVolts);
// We create a property for every value used to compute the flow rate, and also the flow rate itself.
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid + "_VACUUM", rawVacuumCounts.ToString() ) );
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid + "_VACUUM_INCHES", Pump.ConvertRawVacuumToInches( rawVacuumCounts ).ToString() ) );
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid, rawFlowCounts.ToString() ) );
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid + "_VOLTS", flowVolts.ToString() ) );
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid + "_RATE", flowRate.ToString() ) );
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid + "_PUMP_VOLTS", pumpVoltage.ToString() ) );
// The flow is considered a failure if it's not equal to the StandardFlowRate plus/minus the standardtolerance
bool flowFailed = flowRate < ( Pump.StandardFlowRate - Pump.FLOWRATE_TOLERANCE ) || flowRate > ( Pump.StandardFlowRate + Pump.FLOWRATE_TOLERANCE );
// TODO - we should rename the translation string so that it's prefixed with "CHECK_FLOW" instead of "SOLENOID_FLOW"
ReportDiagnostic( details, details.GetText( "SOLENOID_FLOW_" + solenoid ), flowString, flowFailed );
// Check Pump Error Status -- FAIL IF STATE IS 1
int pumpErrorState = Pump.GetPumpErrorState();
// Report the results.
_gdpList.Add( new GeneralDiagnosticProperty( "DIAGNOSTIC_CHECK_FLOW_" + solenoid + "_PUMP_ERROR", pumpErrorState.ToString() ) );
// TODO - we should rename the translation string so that it's prefixed with "CHECK_FLOW" instead of "SOLENOID_FLOW"
ReportDiagnostic(details, details.GetText("SOLENOID_PUMP_ERROR_" + solenoid), pumpErrorState.ToString(), (pumpErrorState == 1));
// Stop the pump and close the solenoid
Pump.CloseValve(solenoid);
Pump.DoCheckFlow = false;
}
