//=========================================================================== void Tform_Main::run_FFT ( CCollection<short int> *in, CCollectionStorage<float> *fft, float *CentralFreq, float minFreq, float maxFreq ) { int aPower; CCollection<float> re; re.Clear(); CCollection<float> im; im.Clear(); int counter = 0; int MaximumIndex = -1; float temp; SoundData.Get_Maximum_ext(&temp, &MaximumIndex); for ( unsigned int i = MaximumIndex; i < SoundData.ValuesCount; i++) { re.Add(SoundData.Values[i]); //re.Add(LoadedData.Items[1]->Values[i]); im.Add(0); if ( counter++ > 263144 ) break; /// --- Если больше 2 ^18 ---- } // ****************** FFT(&re, &im, &aPower); // ****************** // ----- fft->SetItemsCount(2); int DataCount = exp(aPower * std::log(2.0)); for ( int i = 0; i < DataCount / 2; i++) { double xVal = i / (double)DataCount * WorkFreq; if ( xVal >= minFreq && xVal < maxFreq ) { double yVal = sqrt(re.Values[i]*re.Values[i] + im.Values[i]*im.Values[i])*2.0 / (double)DataCount; fft->Items[0]->Add(xVal); fft->Items[1]->Add(yVal); } } // int array_index = -1; // float array_value = -1; // fft->Items[1]->Get_Maximum_ext(&array_value, &array_index); // *CentralFreq = fft->Items[0]->Values[array_index]; }
//=========================================================================== void __fastcall TfrmMain::bAddCanalsClick(TObject *Sender) { int ButtonTag = ((TButton*)Sender)->Tag; if ( CheckListBox1->Items->Count == 0 ) return; int CountCheckedItems = 0; for ( int i = 0; i < CheckListBox1->Items->Count; i++ ) if ( CheckListBox1->Checked[i] == true ) CountCheckedItems++; if ( CountCheckedItems != 2 ) { MessageBox(NULL, "Выберите два сигнала для проведения операции", "Signal - Ошибка", MB_OK|MB_ICONERROR|MB_TASKMODAL); return; } // ----- Количество выделенных елементов --------- CurrentWorkDevice->Canals->Add(); CCollection<short int> *BaseCol = NULL;; CCollection<short int> *SecondCol = NULL;; CCollection<short int> *NewCol = CurrentWorkDevice->Canals->Items[CurrentWorkDevice->Canals->ItemsCount - 1]; short int *Base = NULL; short int *Second = NULL; // ----- for ( int i = 0; i < CheckListBox1->Items->Count; i++ ) if ( CheckListBox1->Checked[i] == true ) { if ( Base == NULL ) { BaseCol = (CCollection<short int> *)CheckListBox1->Items->Objects[i]; Base = BaseCol->Values; } else { SecondCol = (CCollection<short int> *)CheckListBox1->Items->Objects[i]; Second = SecondCol->Values; } } // ----- NewCol->ValueT0 = BaseCol->ValueT0; NewCol->gr_YVoltTransformCoef = BaseCol->gr_YVoltTransformCoef; // ----- int CountData = ((CCollection<short int> *)CheckListBox1->Items->Objects[0])->Count; char *val = (char*) malloc (100); if ( ButtonTag == 0 ) { for ( int i = 0; i < CountData; i++ )NewCol->Add(Base[i] + Second[i]); sprintf (val, "%s_p_%s", BaseCol->Name, SecondCol->Name); } else { for ( int i = 0; i < CountData; i++ )NewCol->Add(Base[i] - Second[i]); sprintf (val, "%s_m_%s", BaseCol->Name, SecondCol->Name); } NewCol->SetName(val); free(val); SetInterfaceParam(); Application->ProcessMessages(); rgVoltScalesClick(Sender); rgTimeScalesClick(Sender); // ----- BChart->DrawSeriesValues(); BChart->Canals = BChart->Canals; BChart->pbMain->Repaint(); Application->ProcessMessages(); // ----- bAutoPositionClick(Sender); }
//=========================================================================== void __fastcall Tform_Main::button_StartDTFCalcClick1(TObject *Sender) { DecimalSeparator = '.'; if ( listbox_DTFFreqs->Items->Count != 0 ) if ( listbox_DTFFreqs->ItemIndex != -1 ) ResonatorFreq = StrToFloat(listbox_DTFFreqs->Items->Strings[listbox_DTFFreqs->ItemIndex]); PageControl1->TabIndex = 3; PageControl2->TabIndex = 0; Application->ProcessMessages(); ClearSeries(Chart2, true); Chart2->AutoSize = true; // ----------------------------------------- AddStringToLog("DFT Calculate"); // ----------------------------------------- // ----------- float Freq1 = 0; float Freq2 = 0; try { Freq1 = StrToFloat( e_Freq1->Text ); Freq2 = StrToFloat( e_Freq2->Text ); } catch (...) { MessageBox(Handle, "Ошибка ввода диапазона частот", "Ошибка", 0); return; } // ----------- Чарт ----------- ClearSeries(Chart2, true); button_StartDTFCalc->Enabled = false; button_StopDTFCalc ->Enabled = true; isDTFStoped = false; //////////////////////////////// /* SoundData.Clear(); Freq1 = 5929.56; Freq2 = 5932.56; WorkFreq = 48000; for ( int i = 0; i < 500000; i++) SoundData.Add(10000.0 * sin(TWO_PI*5931.06*i / (float)WorkFreq)); */ //////////////////////////////// // -------------- /////////////// int CountData = SoundData.ValuesCount; float *x_r = (float*) malloc (sizeof(float) * CountData); float s_r; float s_i; float t_r; float t_i; for ( int i = 0; i < CountData; i++) x_r[i] = SoundData.Values[i]; // ------------- int Mode = 0; // ----- Прямое преобразование фурье ---- float S = -1; // ---- Прямое или обратное (-1 / 1) преобразование //float R = 1; // ---- if ( Mode == 1 ) { S = 1.0; //R = 1.0 / (float)CountData; } CCollection<float> xFreqValues; xFreqValues.Clear(); CCollection<float> yFreqValues; yFreqValues.Clear(); // ------------- Индексы масивов , для которых будем считать ДПФ ----- /////////////// int i1 = (CountData) * Freq1 / WorkFreq; int i2 = (CountData) * Freq2 / WorkFreq; // ------------- Chart2->BottomAxis->SetMinMax(i1 / (float) CountData * WorkFreq, i2 / (float)CountData * WorkFreq); float CountData_inv = 1.0 / (float)CountData; float S_TWO_PI_CountData_inv = S*TWO_PI*CountData_inv; float max = -121312; int max_index = -1; for (int k = i1; k < i2; k++ ) { if ( isDTFStoped == true ) break; s_i = 0; s_r = 0; for ( int n = 0; n < CountData; n++ ) { float argument = S_TWO_PI_CountData_inv * k*n; t_r = cos(argument); t_i = sin(argument); s_r = s_r + x_r[n]*t_r;// - a.i*b.i; s_i = s_i + x_r[n]*t_i;// + a.r*b.i; } float x_val = k * CountData_inv * WorkFreq; float y_val = sqrt(s_r*s_r + s_i*s_i); y_val = y_val * 2.0 * CountData_inv; if ( max < y_val ){ max = y_val; max_index = k; } xFreqValues.Add(x_val); yFreqValues.Add(y_val); Chart2->Series[0]->AddXY(x_val, y_val); Application->ProcessMessages(); } float index1 = (max_index - 2 < 0 ) ? 0 : max_index - 2; float index2 = (max_index + 2 > CountData - 1 ) ? CountData - 1 : max_index + 2; float indexator_incroment = 1.0 / (float)DTF_InterpolationPointsCount; for (float k = index1; k < index2; k = k + indexator_incroment ) { if ( isDTFStoped == true ) break; s_i = s_r = 0; for ( int n = 0; n < CountData; n++ ) { //float argument = k*n * S_TWO_PI_CountData_inv; float argument = S_TWO_PI_CountData_inv * k*n; t_r = cos(argument); t_i = sin(argument); s_r = s_r + x_r[n]*t_r; s_i = s_i + x_r[n]*t_i; } float x_val = k * CountData_inv * WorkFreq; float y_val = sqrt(s_r*s_r + s_i*s_i); y_val = y_val * 2.0 * CountData_inv; xFreqValues.Add(x_val); yFreqValues.Add(y_val); Chart2->Series[0]->AddXY(x_val, y_val); Application->ProcessMessages(); } free(x_r); // ----------------------------------------- // ----------------------------------------- // ----- Расчет добротности ---------------- // ----------------------------------------- if ( isDTFStoped == true ){ AddStringToLog("DFT stoped"); } else { TFastLineSeries *ls = (TFastLineSeries *)Chart2->Series[0]; float max = -1000; float CenterFreq = 0; int Index_of_MaxFreq = -1; for ( int i = 0; i < ls->YValues->Count; i++) if ( max < ls->YValues->Value[i] ) { max = ls->YValues->Value[i]; CenterFreq = ls->XValues->Value[i]; Index_of_MaxFreq = i; } float freq1 = 0, freq2 = 0; float val1, val2; float px_1[2], py_1[2]; float px_2[2], py_2[2]; // ---- Поиск Левого бока ---- for ( int i = Index_of_MaxFreq; i > 1; i-- ) { if ( ls->YValues->Value[i] <= 0.707*max) { float df = ls->XValues->Value[i+1] - ls->XValues->Value[i]; float ya = ls->YValues->Value[i ]; float yb = ls->YValues->Value[i+1]; val1 = 0.707*max; freq1 = ls->XValues->Value[i] + df * (0.707*max - ya) / (yb - ya); break; } } // ---- Поиск Правой бока ---- for ( int i = Index_of_MaxFreq; i < ls->YValues->Count; i++ ) { if ( ls->YValues->Value[i] <= 0.707*max) { float df = ls->XValues->Value[i ] - ls->XValues->Value[i-1]; float ya = ls->YValues->Value[i-1]; float yb = ls->YValues->Value[i ]; val2 = 0.707*max; freq2 = ls->XValues->Value[i-1] + df * (0.707*max - ya) / (yb - ya); break; } } /* Index_of_MaxFreq */ /* for ( int i = 1; i < ls->YValues->Count; i++) { if ( ls->YValues->Value[i] >= 0.707*max && freq1 < 100) { float df = ls->XValues->Value[i] - ls->XValues->Value[i-1]; float ya = ls->YValues->Value[i-1]; float yb = ls->YValues->Value[i ]; val1 = 0.707*max; freq1 = ls->XValues->Value[i-1] + df * (0.707*max - ya) / (yb - ya); } if ( ls->YValues->Value[i] <= 0.707*max && freq1 > 100 && freq2 < 100) { float df = ls->XValues->Value[i] - ls->XValues->Value[i-1]; float ya = ls->YValues->Value[i-1]; float yb = ls->YValues->Value[i ]; val2 = 0.707*max; freq2 = ls->XValues->Value[i-1] + df * (0.707*max - ya) / (yb - ya); } } */ float q = CenterFreq / (freq2 - freq1); AddStringToLog("F/dF = " + FloatToStrF(q, ffFixed, 20, 2)); e_Dobrotnost2->Text = FloatToStrF(q, ffFixed, 20, 2); Chart2->Series[1]->AddXY(CenterFreq, max); Chart2->Series[1]->AddXY(freq1, val1); Chart2->Series[1]->AddXY(freq2, val2); Chart2->Series[2]->AddXY(freq1 - 0.5*(freq2 - freq1), 0.707 * max); Chart2->Series[2]->AddXY(freq2 + 0.5*(freq2 - freq1), 0.707 * max); Chart2->LeftAxis->SetMinMax(0, max*1.12); Chart2->BottomAxis->SetMinMax(freq1 - 2.0*(freq2 - freq1), freq2 + 2.0*(freq2 - freq1)); } // ----------- button_StartDTFCalc->Enabled = true; button_StopDTFCalc ->Enabled = false; isDTFStoped = false; }
//=========================================================================== void Tform_Main::GetMaximums( CCollectionStorage<float> *in, CCollectionStorage<float> *out_y, float freq1, float freq2) { if ( in == NULL ) return; if ( in->Items == NULL ) return; // ФОрмируем масив с реальных максимумов , ищем по производным CCollection<float> x, y; // ----------- float differ_old = in->Items[1]->Values[1] - in->Items[1]->Values[0]; // ---- Предыдущая производная ------- float differ_cur; // ---- Текущая производная ------- for ( unsigned int i = 2; i < in->Items[0]->ValuesCount; i++) { if ( in->Items[0]->Values[i-1] >= freq1 && in->Items[0]->Values[i-1] <= freq2 ) { differ_cur = in->Items[1]->Values[i] - in->Items[1]->Values[i-1]; if ( differ_old > 0 && differ_cur < 0 ) { y.Add(in->Items[1]->Values[i-1]); x.Add(in->Items[0]->Values[i-1]); } differ_old = differ_cur; } } // теперь с предыдущих максимумов ищу первых N_Maximums максимумов int N_Maximums = FFT_MaxPointsCount; out_y->Items[0]->Clear(); out_y->Items[1]->Clear(); CCollection<int> indexes; float max = -1111; int max_index = -1; for ( unsigned int i = 0; i < x.ValuesCount; i++ ) { // Прохожусь по запомненым индексам, откидываю повторения bool is_index_found = false; for ( unsigned int k = 0; k < indexes.ValuesCount; k++ ) if ( (int ) i == indexes.Values[k] ) is_index_found = true; if ( is_index_found == true ) continue; // фиксирую максимум if ( max < y.Values[i] ) { max_index = i; max = y.Values[i]; } // если дошел до конца масива, акамулирую данные if ( (unsigned int)i >= x.ValuesCount-1 ){ out_y->Items[0]->Add(x.Values[max_index]); out_y->Items[1]->Add(y.Values[max_index]); indexes.Add(max_index); i = 0; max = -1111; max_index = -1; // если нашел больше четырех максимумов, валю от сюда ) if ( indexes.ValuesCount >= (unsigned int)N_Maximums ) break; } } }
//=========================================================================== void __fastcall TfrmResult_3::BitBtn1Click( TObject *Sender ) { CCollection<float> *si_x[3], *si_y[3]; //----------- si_x[0] = ( cb_Chart1_x->ItemIndex == -1 ) ? NULL : ( CCollection<float> *)cb_Chart1_x->Items->Objects[cb_Chart1_x->ItemIndex]; // ---- частота ----- si_x[1] = ( cb_Chart2_x->ItemIndex == -1 ) ? NULL : ( CCollection<float> *)cb_Chart2_x->Items->Objects[cb_Chart2_x->ItemIndex]; // ---- частота ----- si_x[2] = ( cb_Chart3_x->ItemIndex == -1 ) ? NULL : ( CCollection<float> *)cb_Chart3_x->Items->Objects[cb_Chart3_x->ItemIndex]; // ---- частота ----- si_y[0] = ( cb_Chart1_y->ItemIndex == -1 ) ? NULL : ( CCollection<float> *)cb_Chart1_y->Items->Objects[cb_Chart1_y->ItemIndex]; // ---- Сигнал - Пучности ---- si_y[1] = ( cb_Chart2_y->ItemIndex == -1 ) ? NULL : ( CCollection<float> *)cb_Chart2_y->Items->Objects[cb_Chart2_y->ItemIndex]; // ---- Фаза возбуждения ---- si_y[2] = ( cb_Chart3_y->ItemIndex == -1 ) ? NULL : ( CCollection<float> *)cb_Chart3_y->Items->Objects[cb_Chart3_y->ItemIndex]; // ---- Фаза Узла ---- //----------- double FreqMaximum = 0; double Puchnost = 0; double Dobrotnost = 0; //double Napjazhenije_Uzla = 0; double FazaPuchnosti = 0; //----------- Memo1->Clear(); int IndexMaximumFreq = -1; int MaximumIndex2 = -1; //----------- Draw_ChartSeries(Chart1, 0, CheckBox1->Checked, true, 3000, 0, 0, si_x[0]->ValuesCount, si_x[0], si_y[0]); Draw_ChartSeries(Chart2, 0, CheckBox1->Checked, true, 3000, 0, 0, si_x[1]->ValuesCount, si_x[1], si_y[1]); Draw_ChartSeries(Chart3, 0, CheckBox1->Checked, true, 3000, 0, 0, si_x[2]->ValuesCount, si_x[2], si_y[2]); //----------- Расчеты ------------ // ---------- Pасчет данных для определения добротности Резонатора (Ищу максимум на кривой и индекс данных) ----------- if ( si_x[0] != NULL && si_y[0] != NULL) { CCollection<float> NormValues; float max = si_y[0]->Values[0]; // --------- for ( unsigned int i = 1; i < si_y[0]->ValuesCount; i++, NormValues.Add(si_y[0]->Values[i])) if ( max < si_y[0]->Values[i] ) { max = si_y[0]->Values[i]; IndexMaximumFreq = i; } // --------- Нормирую значения ----------- for ( unsigned int i = 0; i < NormValues.ValuesCount; i++) NormValues.Values[i] = NormValues.Values[i] / max; // --------- Ищу индексы на уровне 0.7 ----------- int i1 = -1, i2 = -1; if ( IndexMaximumFreq >= 0) { int CurPosition = IndexMaximumFreq; while ( CurPosition-- >= 0) if ( NormValues.Values[CurPosition] < 0.7) { i1 = CurPosition; break; } CurPosition = IndexMaximumFreq; while ( CurPosition++ < (int) NormValues.ValuesCount) if ( NormValues.Values[CurPosition] < 0.7) { i2 = CurPosition; break; } } float deltaF = (i1 >= 0 && i2 >= 0) ? fabs(si_x[0]->Values[i2] - si_x[0]->Values[i1]) : 0; FreqMaximum = (IndexMaximumFreq == 0 ) ? 0 : si_x[0]->Values[IndexMaximumFreq]; Puchnost = (IndexMaximumFreq == 0 ) ? 0 : si_y[0]->Values[IndexMaximumFreq]*1000.0; Dobrotnost = ( deltaF == 0 ) ? 0 : FreqMaximum / deltaF; // --------- Memo1->Lines->Add(""); Memo1->Lines->Add("Добротность = " + FloatToStrF(Dobrotnost, ffFixed, 20, 6)); Memo1->Lines->Add(""); Memo1->Lines->Add("Частота = " + FloatToStrF(FreqMaximum, ffFixed, 20, 6)); Memo1->Lines->Add(""); Memo1->Lines->Add("Ширина полосы = " + FloatToStrF(deltaF, ffFixed, 20, 6)); Memo1->Lines->Add(""); Memo1->Lines->Add(""); Memo1->Lines->Add(AnsiString(si_y[0]->Name)+ " = " + FloatToStrF(Puchnost, ffFixed, 20, 3)); } //----------- if ( si_x[1] != NULL && si_y[1] != NULL && IndexMaximumFreq != -1) { FazaPuchnosti = (IndexMaximumFreq == 0 ) ? 0 : si_y[1]->Values[IndexMaximumFreq]*1000.0; Memo1->Lines->Add(AnsiString(si_y[1]->Name) + " = " + FloatToStrF(FazaPuchnosti, ffFixed, 20, 6)); Memo1->Lines->Add(""); } //----------- if ( si_x[2] != NULL && si_y[2] != NULL) { float max = si_y[2]->Values[0]; // ---------- for ( unsigned int i = 1; i < si_y[2]->ValuesCount; i++) if ( max < si_y[2]->Values[i] ) { max = si_y[2]->Values[i]; MaximumIndex2 = i; } if ( MaximumIndex2 != -1 ) { //Napjazhenije_Uzla = si_y[2]->Values[MaximumIndex2]*1000.0; Memo1->Lines->Add(""); //Memo1->Lines->Add(" " + AnsiString(si_y[2]->Name) + " = " + FloatToStrF(Napjazhenije_Uzla, ffFixed, 20, 3)); //Memo1->Lines->Add(""); Memo1->Lines->Add(" Разночастоность = " + FloatToStrF(fabs(si_x[2]->Values[MaximumIndex2] - FreqMaximum), ffFixed, 20, 6)); } // ---------- } // ---------- double DeltaFi = ( Puchnost == 0 ) ? 0 : atan2(FazaPuchnosti, Puchnost) * 0.5 * 180.0 / M_PI; Memo1->Lines->Add(" Delta FI = " + FloatToStrF(DeltaFi, ffFixed, 20, 6)); // ---------- double val1 = Dobrotnost; // --------- Добротность --------- double val2 = FreqMaximum; // ---- Частота ---- double val3 = Puchnost; // ---- Сигнал пучности ------ double val3_= DeltaFi; double val4 = FazaPuchnosti; // ---- Фаза пучности---- Memo1->Lines->Add(""); Memo1->Lines->Add(FloatToStrF(val1, ffFixed, 20, 1) + " " + FloatToStrF(val2, ffFixed, 20, 4) + " " + FloatToStrF(val3, ffFixed, 20, 2) + " " + FloatToStrF(val3_, ffFixed, 20, 3) + " " + FloatToStrF(val4, ffFixed, 20, 3) + " "); // ---------- }