public RecordService(ISampleService sampleService, IEventAggregator eventAggregator)
{
int i;
_sampleService = sampleService;
ChannelNames = new string[_sampleService.ChannelNum];
ChannelNames[0] = "主驾驶";
ChannelNames[1] = "副驾驶";
ChannelNames[2] = "左后座";
ChannelNames[3] = "右后座";
Nfft = 8192;
FrameDN = _sampleService.PackLen;
_SampleT = Nfft / _sampleService.fs;
double df = _sampleService.fs / Nfft / 2;
_fstarti = (int)Math.Floor(_fstart / df);
_fstart = _fstarti * df;
_flen = (int)Math.Ceiling(_fstop / df);
if (_flen >= Nfft)
{
_flen = Nfft - 1;
}
_fstop = _flen * df;
_flen = _flen - _fstarti + 1;
_aweight = Weight.GetWeightData(FreqWeightType.AWeight, fstart, df, _flen);
_aweightdb = new double[_aweight.Length];
for (i = 0; i < _flen; i++)
{
_aweightdb[i] = 20 * Math.Log10(_aweight[i] * Math.Sqrt(2) / Nfft) + 93.9794; //93.9794为2e-5Pa参考
_aweight[i] *= _aweight[i]; //93.9794为2e-5Pa参考
}
_overallFix = 20 * Math.Log10(Math.Sqrt(2) / Nfft) + 93.9794;
_maxFrfData = new float[_flen];
_spectrumCalculator = new SpectrumCalculator();
Sens = new double[4];
for (i = 0; i < 4; i++)
{
Sens[i] = 0.001764087 * 2 / 10.0909;// 5.0f / 32768 * 11.56112242;5.0f / 32768;//
}
_oldtimeData = new Int16[ChannelNum][];
for (i = 0; i < ChannelNum; i++)
{
_oldtimeData[i] = new Int16[Nfft];
}
_eventAggregator = eventAggregator;
_eventAggregator.GetEvent <SampleServiceStateChangedEvent>().Subscribe(OnSampleStateChanged, ThreadOption.BackgroundThread);
_eventAggregator.GetEvent <SampleServiceDataEvent>().Subscribe(OnDataSampled, ThreadOption.BackgroundThread);
}
/// <summary>
/// 释放并清空
/// </summary>
public void Dispose()
{
if (_spectrumCalculator != null)
{
_spectrumCalculator.Dispose();
_spectrumCalculator = null;
}
}
/// <summary>
/// 构造
/// </summary>
/// <param name="updateIntervalMs">FFT计算间隔</param>
/// <param name="samplingFrequency">采样频率</param>
/// <param name="windowLength">FFT的窗口长度</param>
/// <param name="channelCount">频道数</param>
public RealtimeFFTCalculator(double updateIntervalMs,
int samplingFrequency, int windowLength, int channelCount)
{
_oldData = new double[channelCount][];
for (int i = 0; i < channelCount; i++)
{
_oldData[i] = new double[0];
}
_intervalMs = updateIntervalMs;
m_iChannelCount = channelCount;
m_iFFTWindowLen = windowLength;
_samplingFrequency = samplingFrequency;
_startTicks = DateTime.Now.Ticks;
_lastTicks = _startTicks;
_updateInterval = TimeSpan.FromMilliseconds(updateIntervalMs).Ticks;
_spectrumCalculator = new SpectrumCalculator();
}
public void SetGraphs(LightningChartUltimate throughputGraph, LightningChartUltimate tfGraph,
LightningChartUltimate timeGraph, LightningChartUltimate freqGraph)
{
int i, j;
double fstart = _dataFileNode.fstart;
double df = _dataFileNode.fs / _dataFileNode.Nfft / 2;
float[] maxfreq = _dbClientService.getMaxFrf(_dataFileNode.Id);
flen = maxfreq.Length;
_throughputGraph = throughputGraph;
_tfGraph = tfGraph;
_timeGraph = timeGraph;
_freqGraph = freqGraph;
{
_throughputGraph.BeginUpdate();
_throughputGraph.Title.Visible = false;
_throughputGraph.ViewXY.LegendBoxes[0].Position = LegendBoxPositionXY.TopRight;
_throughputGraph.ViewXY.LegendBoxes[0].Layout = LegendBoxLayout.Vertical;
AxisX axisX = _throughputGraph.ViewXY.XAxes[0];
axisX.Title.Text = "时间(s)";
AxisY axisY0 = _throughputGraph.ViewXY.YAxes[0];
axisY0.Title.Text = "声压(Pa)";
AxisY axisY1 = new AxisY(_throughputGraph.ViewXY);
axisY1.Title.Text = "总声压级(dBA)";
_throughputGraph.ViewXY.YAxes.Add(axisY1);
_maxrmsSeries = new SampleDataSeries(_throughputGraph.ViewXY, axisX, axisY1);
_maxrmsSeries.Title.Text = "最大总声压级";
_maxrmsSeries.LineStyle.Color = Colors.Red;
_maxrmsSeries.SampleFormat = SampleFormat.SingleFloat;
_maxrmsSeries.FirstSampleTimeStamp = _dataFileNode.Nfft / _dataFileNode.fs / 2;
_maxrmsSeries.SamplingFrequency = _dataFileNode.fs / _dataFileNode.FrameDN;
_throughputGraph.ViewXY.SampleDataSeries.Add(_maxrmsSeries);
_rmsSeries = new SampleDataSeries(_throughputGraph.ViewXY, axisX, axisY1);
_rmsSeries.Title.Text = "总声压级";
_rmsSeries.LineStyle.Color = Colors.Blue;
_rmsSeries.SampleFormat = SampleFormat.SingleFloat;
_rmsSeries.FirstSampleTimeStamp = _maxrmsSeries.FirstSampleTimeStamp;
_rmsSeries.SamplingFrequency = _maxrmsSeries.SamplingFrequency;
_throughputGraph.ViewXY.SampleDataSeries.Add(_rmsSeries);
_throughputgraph_verticalCursor = new LineSeriesCursor(_throughputGraph.ViewXY, axisX);
_throughputgraph_verticalCursor.Style = CursorStyle.VerticalNoTracking;
_throughputgraph_verticalCursor.LineStyle.Color = Colors.White;
_throughputgraph_verticalCursor.LineStyle.Pattern = LinePattern.Dot;
_throughputgraph_verticalCursor.LineStyle.Width = 3;
_throughputgraph_verticalCursor.ValueAtXAxis = 10;
_throughputgraph_verticalCursor.MouseHighlight = MouseOverHighlight.None;
_throughputGraph.ViewXY.LineSeriesCursors.Add(_throughputgraph_verticalCursor);
_throughputSeries = new SampleDataSeries(_throughputGraph.ViewXY, axisX, axisY0);
_throughputSeries.Title.Text = "时域";
_throughputSeries.LineStyle.Color = Colors.Orange;
_throughputSeries.SampleFormat = SampleFormat.SingleFloat;
_throughputSeries.FirstSampleTimeStamp = 0;
_throughputSeries.SamplingFrequency = _dataFileNode.fs;
_throughputGraph.ViewXY.SampleDataSeries.Add(_throughputSeries);
float[] _maxrmsData = new float[_dataFileNode.NFrame];
_rmsData[0].CopyTo(_maxrmsData, 0);
for (i = 1; i < _dataFileNode.NFrame; i++)
{
for (j = 0; j < _dataFileNode.ChannelNum; j++)
{
if (_rmsData[j][i] > _maxrmsData[i])
{
_maxrmsData[i] = _rmsData[j][i];
}
}
}
_maxrmsSeries.SamplesSingle = _maxrmsData;
_throughputGraph.EndUpdate();
}
{
_tfGraph.BeginUpdate();
_tfGraph.Title.Visible = false;
//_tfGraph.ViewXY.LegendBoxes[0].Visible = false;
_tfGraph.ViewXY.LegendBoxes[0].Position = LegendBoxPositionXY.TopRight;
_tfGraph.ViewXY.LegendBoxes[0].ShowCheckboxes = false;
AxisX axisX = _tfGraph.ViewXY.XAxes[0];
axisX.Title.Text = "时间(s)";
AxisY axisY = _tfGraph.ViewXY.YAxes[0];
axisY.Title.Text = "频率(Hz)";
_tfSeries = new IntensityGridSeries(_throughputGraph.ViewXY, axisX, axisY);
_tfSeries.PixelRendering = true;
_tfSeries.ContourLineType = ContourLineTypeXY.None;
_tfSeries.ValueRangePalette = CreatePalette(_tfSeries, 20, 100);
_tfSeries.SetRangesXY(_dataFileNode.Nfft / _dataFileNode.fs / 2,
_dataFileNode.Nfft / _dataFileNode.fs / 2 + (_dataFileNode.NFrame - 1) * _dataFileNode.FrameDN / _dataFileNode.fs,
fstart, fstart + (flen - 1) * df);
_tfSeries.MouseInteraction = false;
_tfSeries.LegendBoxUnits = null;
_tfSeries.LegendBoxValuesFormat = "0";
//_tfSeries.Title.Visible = false;
_tfSeries.Title.Text = "声压级(dBA)";
_tfGraph.ViewXY.IntensityGridSeries.Add(_tfSeries);
_tfgraph_verticalCursor = new LineSeriesCursor(_tfGraph.ViewXY, axisX);
_tfgraph_verticalCursor.Style = CursorStyle.VerticalNoTracking;
_tfgraph_verticalCursor.LineStyle.Color = Colors.White;
_tfgraph_verticalCursor.LineStyle.Pattern = LinePattern.Dot;
_tfgraph_verticalCursor.LineStyle.Width = 3;
_tfgraph_verticalCursor.ValueAtXAxis = _throughputgraph_verticalCursor.ValueAtXAxis;
_tfgraph_verticalCursor.MouseHighlight = MouseOverHighlight.None;
_tfGraph.ViewXY.LineSeriesCursors.Add(_tfgraph_verticalCursor);
_tfgraph_horizontalCursor = new ConstantLine(_tfGraph.ViewXY, axisX, axisY);
_tfgraph_horizontalCursor.LineStyle.Color = Colors.White;
_tfgraph_horizontalCursor.LineStyle.Width = 3;
_tfgraph_horizontalCursor.LineStyle.Pattern = LinePattern.Dot;
_tfgraph_horizontalCursor.Value = 2000;
_tfgraph_horizontalCursor.ShowInLegendBox = false;
_tfgraph_horizontalCursor.MouseHighlight = MouseOverHighlight.None;
_tfGraph.ViewXY.ConstantLines.Add(_tfgraph_horizontalCursor);
spectrumCalculator = new SpectrumCalculator();
double[] _aweight = Weight.GetWeightData(FreqWeightType.AWeight, fstart, df, flen);
_aweightdb = new double[_aweight.Length];
for (i = 0; i < flen; i++)
{
_aweightdb[i] = 20 * Math.Log10(_aweight[i] * Math.Sqrt(2) / _dataFileNode.Nfft) + 93.9794;//93.9794为2e-5Pa参考
}
fstarti = (int)(fstart / df);
////Configure legend
_tfGraph.ViewXY.LegendBoxes[0].IntensityScales.ScaleSizeDim1 = 400;
_tfGraph.ViewXY.LegendBoxes[0].Layout = LegendBoxLayout.Horizontal;
//_tfGraph.ViewXY.LegendBoxes[0].Offset = new PointIntXY(-15, -70);
_tfGraph.ViewXY.LegendBoxes[0].ResetLocation();
_tfGraph.EndUpdate();
}
{
_timeGraph.BeginUpdate();
_timeGraph.Title.Visible = false;
_timeGraph.ViewXY.LegendBoxes[0].Position = LegendBoxPositionXY.TopRight;
_timeGraph.ViewXY.LegendBoxes[0].Visible = false;
AxisX axisX = _timeGraph.ViewXY.XAxes[0];
axisX.Title.Text = "时间(s)";
AxisY axisY = _timeGraph.ViewXY.YAxes[0];
axisY.Title.Text = "声压(Pa)";
_timegraph_verticalCursor = new LineSeriesCursor(_timeGraph.ViewXY, axisX);
_timegraph_verticalCursor.Style = CursorStyle.VerticalNoTracking;
_timegraph_verticalCursor.LineStyle.Color = Colors.White;
_timegraph_verticalCursor.LineStyle.Pattern = LinePattern.Dot;
_timegraph_verticalCursor.LineStyle.Width = 3;
_timegraph_verticalCursor.ValueAtXAxis = _dataFileNode.Nfft / _dataFileNode.fs / 2;
_timegraph_verticalCursor.MouseHighlight = MouseOverHighlight.None;
_timeGraph.ViewXY.LineSeriesCursors.Add(_timegraph_verticalCursor);
_timeSeries = new SampleDataSeries(_timeGraph.ViewXY, axisX, axisY);
_timeSeries.Title.Text = "时域";
_timeSeries.LineStyle.Color = Colors.Orange;
_timeSeries.SampleFormat = SampleFormat.SingleFloat;
_timeSeries.FirstSampleTimeStamp = 0;
_timeSeries.SamplingFrequency = _dataFileNode.fs;
_timeGraph.ViewXY.SampleDataSeries.Add(_timeSeries);
_timeGraph.ViewXY.ZoomToFit();
_timeGraph.EndUpdate();
}
{
_freqGraph.BeginUpdate();
_freqGraph.Title.Visible = false;
_freqGraph.ViewXY.LegendBoxes[0].Position = LegendBoxPositionXY.TopRight;
_freqGraph.ViewXY.LegendBoxes[0].Layout = LegendBoxLayout.Vertical;
AxisX axisX = _freqGraph.ViewXY.XAxes[0];
axisX.Title.Text = "频率(Hz)";
AxisY axisY = _freqGraph.ViewXY.YAxes[0];
axisY.Title.Text = "声压级(dBA)";
_freqgraph_verticalCursor = new LineSeriesCursor(_freqGraph.ViewXY, axisX);
_freqgraph_verticalCursor.Style = CursorStyle.VerticalNoTracking;
_freqgraph_verticalCursor.LineStyle.Color = Colors.White;
_freqgraph_verticalCursor.LineStyle.Pattern = LinePattern.Dot;
_freqgraph_verticalCursor.LineStyle.Width = 3;
_freqgraph_verticalCursor.ValueAtXAxis = _tfgraph_horizontalCursor.Value;
_freqgraph_verticalCursor.MouseHighlight = MouseOverHighlight.None;
_freqGraph.ViewXY.LineSeriesCursors.Add(_freqgraph_verticalCursor);
_maxfreqSeries = new SampleDataSeries(_freqGraph.ViewXY, axisX, axisY);
_maxfreqSeries.Title.Text = "最大值";
_maxfreqSeries.LineStyle.Color = Colors.Red;
_maxfreqSeries.SampleFormat = SampleFormat.SingleFloat;
_maxfreqSeries.FirstSampleTimeStamp = fstart;
_maxfreqSeries.SamplingFrequency = 1 / df;
_freqGraph.ViewXY.SampleDataSeries.Add(_maxfreqSeries);
_maxfreqSeries.SamplesSingle = maxfreq;
_freqSeries = new SampleDataSeries(_freqGraph.ViewXY, axisX, axisY);
_freqSeries.Title.Text = "频谱";
_freqSeries.LineStyle.Color = Colors.Orange;
_freqSeries.SampleFormat = SampleFormat.DoubleFloat;
_freqSeries.FirstSampleTimeStamp = fstart;
_freqSeries.SamplingFrequency = 1 / df;
_freqGraph.ViewXY.SampleDataSeries.Add(_freqSeries);
_freqGraph.ViewXY.ZoomToFit();
_freqGraph.EndUpdate();
}
_ShowTimer.Interval = _dataFileNode.FrameDN / _dataFileNode.fs * 1000 / 2;
_ShowTimer.Elapsed += _ShowTimer_Elapsed;
_tfgraph_verticalCursor.PositionChanged += verticalCursor_PositionChanged;
_tfgraph_horizontalCursor.ValueChanged += horizontalCursor_ValueChanged;
UpdateChannel();
}
