/// <summary>
/// LogChirp波形生成
/// </summary>
/// <param name="sampleRate">采样率</param>
/// <param name="waveLength">波形长度</param>
/// <param name="amplitude">波幅</param>
/// <param name="frequencyMin">最低频率</param>
/// <param name="frequencyMax">最高频率</param>
/// <param name="preSweepRatio">前向延伸比</param>
/// <param name="postSweepRatio">后向延伸比</param>
/// <returns>波形数据</returns>
public static double[] LogChirpWaveform(double sampleRate, uint waveLength, double amplitude,
double frequencyMin, double frequencyMax, double preSweepRatio, double postSweepRatio)
{
LogChirpWaveform logChirpWaveform = new LogChirpWaveform();
logChirpWaveform.CreateData(amplitude, frequencyMin, frequencyMax, preSweepRatio,
postSweepRatio, waveLength, sampleRate);
double[] waveData = new double[logChirpWaveform.GetTotalPoints()];
logChirpWaveform.GetCopyOfData(waveData);
return(waveData);
}
public void Start()
{
if (null == tableLayoutPanel_waveConfig.Controls[0])
{
return;
}
double sampleRate = (double)numericUpDown_sampleRate.Value;
Generator waveGenerator = tableLayoutPanel_waveConfig.Controls[0] as Generator;
AITask.AITask input = _globalInfo.AITask;
AOTask.AOTask output = _globalInfo.AOTask;
output.SetUpdateRate(sampleRate);
input.SetSampleRate(sampleRate);
double channelRange = waveGenerator.GetAmplitude();
output.AddChannel(comboBox_aoChannel.SelectedIndex, -1 * channelRange, channelRange);
input.AddChannel(comboBox_testChannel.SelectedIndex, -1 * channelRange, channelRange);
double[] outData = waveGenerator.Generate();
output.SetSamplesToUpdate(outData.Length);
double outTime = outData.Length / output.GetUpdateRate();
input.SetSamplesToAcquire((int)(outTime * input.GetSampleRate() * GlobalInfo.ExtraReadTime));
output.WriteData(outData, -1);
input.Start();
output.Start();
_testData = new double[input.GetSamplesToAcquire()];
input.ReadData(ref _testData, input.GetSamplesToAcquire(), GlobalInfo.ReadTimeOut);
_globalInfo.Mainform.Invoke(new Action <double[], double, double>(easyChart_testWaveform.Plot), _testData,
0, 1);
// double[] responseX, responseY, thdX, thdY;
// SeeSharpTools.JY.Audio.AudioAnalyzer.AnalyzeLogChripWave(readWaveform,
// (LogChirpWaveform) waveGenerator.GetRefWaveform(), input.GetSampleRate(), out responseX,
// out responseY, out thdX, out thdY);
_refWaveform = (LogChirpWaveform)waveGenerator.GetRefWaveform();
_analyzeSize = _refWaveform.GetTotalPoints();
}
