シミュレーション用データ生成器（２）
- atliqu
- 2020年9月23日
複素信号と2波の重畳信号が生成できるようにしました。 また、2波の周波数成分が表示できるようにしました。
単一波、実信号です。
2波重畳、実信号です。
単一波、複素信号です。
2波重畳、複素信号です。
ソールです。
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public partial class Form1 : Form { public Form1() { InitializeComponent(); } Complex[] wavedata1; double[] db; double freq1, freq2, samplerate; int magnitude, addcnt; string romtext = ""; Complex[] Xk; bool dataready, sa_dataready, cmp; DrawGraph dg; Speana sa; private void textBox2_TextChanged(object sender, EventArgs e) { magnitude = (int)(Math.Pow(2, int.Parse(textBox2.Text)) / 2); dg.mag = magnitude; } private void textBox3_TextChanged(object sender, EventArgs e) { samplerate = double.Parse(textBox3.Text) * 1000000; } private void checkBox1_CheckedChanged(object sender, EventArgs e) { cmp = checkBox1.Checked; } private void pictureBox2_Paint(object sender, PaintEventArgs e) { sa.DrawAxis(e.Graphics); if (sa_dataready) sa.DrawSpectrum(e.Graphics, db); } private void checkBox2_CheckedChanged(object sender, EventArgs e) { if (checkBox2.Checked) { textBox5.Enabled = true; label9.Enabled = true; label10.Enabled = true; } else { textBox5.Enabled = false; label9.Enabled = false; label10.Enabled = false; } } private void textBox4_TextChanged(object sender, EventArgs e) { freq1 = double.Parse(textBox4.Text) * 1000; //Hz } private void textBox5_TextChanged(object sender, EventArgs e) { freq2 = double.Parse(textBox5.Text) * 1000; //Hz } private void button2_Click(object sender, EventArgs e) { var fname = textBox7.Text; File.WriteAllText(@fname + ".txt", romtext); } private void textBox1_TextChanged(object sender, EventArgs e) { addcnt = (int)Math.Pow(2, int.Parse(textBox1.Text)); dg.add = addcnt; sa.add = addcnt; } private void pictureBox1_Paint(object sender, PaintEventArgs e) { dg.DrawAxis(e.Graphics); if (dataready) dg.DrawData(e.Graphics, wavedata1, cmp); } private void Form1_Load(object sender, EventArgs e) { freq1 = double.Parse(textBox4.Text) * 1000; //Hz freq2 = double.Parse(textBox5.Text) * 1000; //Hz magnitude = (int)(Math.Pow(2, int.Parse(textBox2.Text)) / 2); addcnt = (int)Math.Pow(2, int.Parse(textBox1.Text)); samplerate = double.Parse(textBox3.Text) * 1000000; cmp = checkBox1.Checked; dg = new DrawGraph(pictureBox1, addcnt, magnitude, cmp); sa = new Speana(pictureBox2, addcnt); if (checkBox2.Checked) { textBox5.Enabled = true; label9.Enabled = true; label10.Enabled = true; } else { textBox5.Enabled = false; label9.Enabled = false; label10.Enabled = false; } dataready = false; sa_dataready = false; } private void button1_Click(object sender, EventArgs e) { wavedata1 = new Complex[addcnt]; dg.mag = magnitude; if (!checkBox1.Checked & !checkBox2.Checked) //実数、単独 { for(int i = 0; i < addcnt; i++) wavedata1[i] = magnitude * Math.Cos(i * 2.0 * Math.PI * freq1 / samplerate); } else if (!checkBox1.Checked & checkBox2.Checked) //実数、重畳 { for (int i = 0; i < addcnt; i++) { wavedata1[i] = magnitude * (Math.Cos(i * 2.0 * Math.PI * freq1 / samplerate) + Math.Cos(i * 2.0 * Math.PI * freq2 / samplerate))/2; } } else if(checkBox1.Checked & !checkBox2.Checked) //複素数、単独 { for(int i = 0; i < addcnt; i++) { wavedata1[i] = magnitude * Math.Cos(i * 2.0 * Math.PI * freq1 / samplerate) + Complex.ImaginaryOne * magnitude * Math.Sin(i * 2.0 * Math.PI * freq1 / samplerate); } } else if(checkBox1.Checked & checkBox2.Checked) //複素数、重畳 { for(int i = 0; i < addcnt; i++) { wavedata1[i] = magnitude * ((Math.Cos(i * 2.0 * Math.PI * freq1 / samplerate) + Math.Cos(i * 2.0 * Math.PI * freq2 / samplerate)) + Complex.ImaginaryOne * (Math.Sin(i * 2.0 * Math.PI * freq1 / samplerate) + Math.Sin(i * 2.0 * Math.PI * freq2 / samplerate)))/2; } } romtext = ""; for (int i = 0; i < addcnt; i++) { var mm = int.Parse(textBox2.Text); var buf1 = Convert.ToString((int)wavedata1[i].Real, 2).PadLeft(mm, '0'); buf1 = buf1.Substring(buf1.Length - mm, mm); if (checkBox1.Checked) { var buf2 = Convert.ToString((int)wavedata1[i].Imaginary, 2).PadLeft(mm, '0'); buf2 = buf2.Substring(buf2.Length - mm, mm); buf1 = buf1 + buf2; } romtext = romtext + buf1 + "\r\n"; } textBox6.Text = romtext; dataready = true; pictureBox1.Refresh(); db = new double[wavedata1.Length]; Xk = new Complex[wavedata1.Length]; Xk = DftExecute(wavedata1); for (int i = 0; i < wavedata1.Length; i++) db[i] = Math.Log10(Xk[i].Magnitude + 1e-9) * 20; sa_dataready = true; pictureBox2.Refresh(); } Complex[] DftExecute(Complex[] xn) { Complex[] Xk = new Complex[xn.Length]; for (int i = 0; i < xn.Length; i++) { Xk[i] = 0; for (int j = 0; j < xn.Length; j++) { Xk[i] = Xk[i] + xn[j] * Complex.Exp(-2 * Math.PI * j * i * Complex.ImaginaryOne / xn.Length); } } return Xk; } } |
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class DrawGraph { private PictureBox picturebox_; private float x0_; //x軸原点 private float y0_; //ｙ軸原点 private float y1_; //y軸１に対するピクセル値 private float width_; private bool comp_; private float tick; private int _add, _mag; private Font myfont_ = new Font("MS UI Gothic", 10); private SolidBrush mysolidbrush_ = new SolidBrush(Color.Black); private const float x_offset = 10.0F; private const float y_offset = 10.0F; //コンストラクタ public DrawGraph(PictureBox myPictureBox, int add, int mag, bool comp) { picturebox_ = myPictureBox; x0_ = picturebox_.Left; y0_ = picturebox_.ClientSize.Height - 1; y1_ = y0_ /(float)(1.2* mag * 2); width_ = picturebox_.ClientSize.Width - 1; tick = width_ / add; _add = add; _mag = mag; comp_ = comp; } public int add { get { return _add; } set { _add = value; tick = width_ / _add; } } public int mag { get { return _mag; } set { _mag = value; y1_ = y0_ / (float)(1.2 * _mag * 2); } } public bool comp { get { return comp_; } set { comp_ = value; } } public void DrawAxis(Graphics gr) { DrawVerticalLines(gr, Pens.Black); DrawHolizontalLines(gr, Pens.Black); } private void DrawHolizontalLines(Graphics gr, Pen mypen) { float yn = y0_ / 10; for (int i = 0; i <= y0_; i += 1) gr.DrawLine(mypen, 0, y0_ - yn * i, width_, y0_ - yn * i); } private void DrawVerticalLines(Graphics gr, Pen mypen) { float xn = width_ / 10; for (int i = 0; i <= (int)width_; i += 1) gr.DrawLine(mypen, xn * i, 0, xn * i, y0_); } public void DrawData(Graphics gr, Complex[] gdata, bool comp) { Pen mypen1 = new Pen(Color.Red); Pen mypen2 = new Pen(Color.Green); PointF oldPoint1 = new PointF(0, (float)(y0_ - y1_ * gdata[0].Real - y0_/2)); PointF oldPoint2 = new PointF(0, (float)(y0_ - y1_ * gdata[0].Imaginary - y0_ / 2)); for (int i = 1; i < gdata.Length - 1; i++) { PointF newPoint1 = new PointF(i * tick, (float)(y0_ - y1_ * gdata[i].Real - y0_/2)); gr.DrawLine(mypen1, oldPoint1, newPoint1); oldPoint1 = newPoint1; if(comp) { PointF newPoint2 = new PointF(i * tick, (float)(y0_ - y1_ * gdata[i].Imaginary - y0_ / 2)); gr.DrawLine(mypen2, oldPoint2, newPoint2); oldPoint2 = newPoint2; } } } } |
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class Speana { private PictureBox picturebox_; private float x0_; //x軸原点 private float y0_; //ｙ軸原点 private float width_; private const float x_offset = 10.0F; private const float y_offset = 10.0F; int add_; public Speana(PictureBox myPitureBox, int add) { picturebox_ = myPitureBox; add_ = add; x0_ = picturebox_.Left; y0_ = picturebox_.ClientSize.Height - 1; width_ = picturebox_.ClientSize.Width - 1; } public int add { get { return add_; } set { add_ = value; } } public void DrawAxis(Graphics gr) { float step = width_ / 16; for (int i = 0; i <= 16; i++) gr.DrawLine(Pens.Black, step * i, 0, step * i, y0_); step = y0_ / 10; for (int i = 0; i <= 10; i++) gr.DrawLine(Pens.Black, 0, y0_ - step * i, width_, y0_ - step * i); step = step/2; for (int i = 0; i <= 20; i++) gr.DrawLine(Pens.Black, width_/2, y0_ - step * i, width_/2 + 3, y0_ - step * i); } public void DrawSpectrum(Graphics gr, double[] data) { float xtick = width_ / add_; PointF oldPoint = new PointF(0, y0_- (float)(data[0])); PointF newPoint = new PointF(); for (int i = 1; i < data.Length; i++) { newPoint.X = i * xtick; newPoint.Y = y0_-(float)data[i]; gr.DrawLine(Pens.Red, oldPoint, newPoint); oldPoint = newPoint; } } } |