FrequencySensor

model FrequencySensor "Frequency sensor"
    import Modelica.Constants.pi;

    extends FluxTubes.Interfaces.AbsoluteSensor;

    Modelica.Blocks.Interfaces.RealOutput y annotation (Placement(transformation(extent = {
        {100, -10}, 
        {120, 10}})));
equation
    2 * pi * y = omega;

    annotation (
        Icon(graphics = {
            Text(
                extent = {
                    {-29, -11}, 
                    {30, -70}},
                textString = "f")}),
        Documentation(info = "<html>\n<p>\nThis sensor can be used to measure the frequency of the reference system.\nThe integral of the angular frequency of the quasi static magnetic system is equal to the reference angle.\n</p>\n</html>"));
end FrequencySensor;