2022-07-30 11:50:01 +08:00
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#ifndef CALCULATION_H_
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#define CALCULATION_H_
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#include <QVector>
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#include <QDebug>
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#include <math.h>
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#include "fftw3.h"
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#include <QMath.h>
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#include <complex>
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typedef struct
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{
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float real,imag;
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}complex;
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class Calculation
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{
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public:
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Calculation();
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~Calculation();
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//将数据取绝对值
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void absVec(QVector<float> & vecAbsData, QVector<float> & vecData);
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//将数据取平均值
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static float mean(QVector<float> & vecData);
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//将数据平方处理 数据有效值
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float rms(QVector<float> & vecData);
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//去数据的直流分量
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static void drop_mean(QVector<float> & vecDropMeanData, QVector<float> & vecData);
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//方根幅值
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float srm(QVector<float> & vecData);
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//方差
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float variance(QVector<float> & vecDropMeanData);
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//偏态指标
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float skew_state(QVector<float> & vecDropMeanData, float fVariance);
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//峭度指标
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float kurtosis(QVector<float> & vecDropMeanData, float fVariance);
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//快速傅里叶变换函数
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static void FFT(int n, fftw_complex* in, fftw_complex* out);
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//快速傅里叶实数变换函数
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void FFT_R(int n, QVector<float> & vecData, fftw_complex* out);
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//快速傅里叶逆变换
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void iFFT(int n, fftw_complex* in, fftw_complex* out);
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//通道幅值和相位提取
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//输入为FFT变换后的数据长度及数据，指定的频率，输出为计算后得到的幅值 和 相位
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void caculateAmp_Pha(int n, fftw_complex* in, int frequency, double &litude, double &phase);
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//希尔伯特变换
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static void hilbert(QVector<double> & vecData, QVector<double> & vecHilbertData, int N);
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//FFT shift
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static void fftShift(fftw_complex* in, int l);
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//频谱图数据
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static void FFTSpec(QVector<double> & vecData, QVector<double> & vecFFTSpecData);
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void _FFT(QVector<double> & vecData, QVector<double> & vecFFTrealData,QVector<double> & vecFFTimageData);
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void _fft(QVector<double> & vecData, QVector<double> & vecFFTrealData,QVector<double> & vecFFTimageData);
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void _iFFT(QVector<double> & vecData, QVector<double> & vecFFTSpecData,QVector<double> & veciFFTData);
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2022-08-02 10:19:41 +08:00
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//积分
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void _Integration(QVector<double> & vecData,QVector<double>& retData,double& RMS);
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//微分
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void _Differentiation(QVector<double> & vecData,QVector<double>& retData);
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2022-07-30 11:50:01 +08:00
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//包络图谱数据
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void envSpec(QVector<double> & vecData, QVector<double> & vecEnvSpecData,int StartFrequency,int EndFrequency,bool PolarPlot=false);
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//hanning 窗
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void Hanning(QVector<double> & vecData,QVector<double> & vecHanningData);
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//相位计算
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double Phase(QVector<double> & vecData);
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QVector<double> ComputeDenCoeffs(int FilterOrder, double Lcutoff, double Ucutoff);
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QVector<double> TrinomialMultiply(int FilterOrder, QVector<double>& b, QVector<double>& c);
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QVector<double> ComputeNumCoeffs(int FilterOrder, double Lcutoff, double Ucutoff, QVector<double>& DenC);
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QVector<double> ComputeLP(int FilterOrder);
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QVector<double> ComputeHP(int FilterOrder);
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//vector<double> filter(int ord, vector<double> a, vector<double> b, int np, vector<double> x);
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2022-11-07 14:02:09 +08:00
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//巴特沃斯滤波(带通)
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2022-07-30 11:50:01 +08:00
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QVector<double> filter(QVector<double>&x, QVector<double>& coeff_b, QVector<double>& coeff_a);
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void ButterWorth(QVector<double>& inData,double *FrequencyBands,QVector<double>& outData);
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};
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#endif
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