Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Filterdesigns.cpp
- Committer:
- Bartvaart
- Date:
- 2015-10-08
- Revision:
- 14:371e0d505971
- Parent:
- 13:b01231e0b743
- Child:
- 15:c1a8f28d6583
File content as of revision 14:371e0d505971:
#include "Filterdesigns.h" #include "Filter.h" #include "Meanvalue.h" // Inputwaardes //Notch 50Hz // Filter1a: 50Hz Notch double v1_50a = 0, v2_50a = 0; const double a1_50a = -4.45616687966, a2_50a = 0.0; const double b0_50a = 1.00000000000, b1_50a = -4.45738754850, b2_50a = 0.0; const double gain_50a = 1.000000; // Filter1b: 50Hz Notch double v1_50b = 0, v2_50b = 0; const double a1_50b = 6.24687974012, a2_50b = 9.75279168287; const double b0_50b = 1.00000000000, b1_50b = 6.24687974012, b2_50b = 9.75587662190; const double gain_50b = 1.0; // Filter1c: 50Hz Notch double v1_50c = 0, v2_50c = 0; const double a1_50c = -1.93135518860, a2_50c = 0.93135518860; const double b0_50c = 1.00000000000, b1_50c = -1.93013451976, b2_50c = 0.931354816092; const double gain_50c = 1.0; //HighPass 20Hz // Filter2a: 20Hz HighPass double v1_HPa = 0, v2_HPa = 0; const double a1_HPa = 1.64732093404, a2_HPa = 0.0; const double b0_HPa = 1.00000000000, b1_HPa = 1.67405904258, b2_HPa = 0.00000000000; const double gain_HPa = 1.0; // Filter2b: 20Hz HighPass double v1_HPb = 0, v2_HPb = 0; const double a1_HPb = -1.70079715112, a2_HPb = 0.70079715112; const double b0_HPb = 1.00000000000, b1_HPb = -1.67405904258, b2_HPb = 0.70079715112; const double gain_HPb = 1.0; //LowPass 3Hz // Filter3a: 3Hz LowPass double v1_LPa = 0, v2_LPa = 0; const double a1_LPa = 1.94667622076, a2_LPa = 0.00000000000; const double b0_LPa = 1.00000000000, b1_LPa = -0.00034631471, b2_LPa = 0.00000000000; const double gain_LPa = 1.00000000000; // Filter3b: 3Hz LowPass double v1_LPb = 0, v2_LPb = 0; const double a1_LPb = -1.94667622076, a2_LPb = 0.94806147959; const double b0_LPb = 1.00000000000, b1_LPb = -0.00103894412, b2_LPb = 0.00000023987; const double gain_LPb = 1.0; // constante variabelen: double gem = 0.4557; // gemiddelde waarde emgsignaal //gemiddelde bepalen double sum = 0; int a = 0; int delay = 40; int samples_length = 10; void Filterdesigns(double u, double &y, double &ymean) { //u = input waarde //y = output waarde u = u - gem; // lees waarde van emg signaal uit // Op deze manier worden de waardes ingelezen in Filter. Zorg dus voor dezelfde volgorde, zodat de waardes goed uitgelezen worden!: // Filter(double u, double &v1, double &v2, const double a1, const double a2, const double b0, const double b1, const double b2, const double gain) // 50Hz Notch filter double y50a = Filter(u, v1_50a, v2_50a, a1_50a, a2_50a, b0_50a, b1_50a, b2_50a, gain_50a); double y50b = Filter(y50a, v1_50b, v2_50b, a1_50b, a2_50b, b0_50b, b1_50b, b2_50b, gain_50b); double y50c = Filter(y50b, v1_50c, v2_50c, a1_50c, a2_50c, b0_50c, b1_50c, b2_50c, gain_50c); // High Pass filter. Tot 20Hz wordt weggefliterd double yHPa = Filter(y50c, v1_HPa, v2_HPa, a1_HPa, a2_HPa, b0_HPa, b1_HPa, b2_HPa, gain_HPa); double yHPb = Filter(yHPa, v1_HPb, v2_HPb, a1_HPb, a2_HPb, b0_HPb, b1_HPb, b2_HPb, gain_HPb); // Absolute waarde wordt genomen. double y1 = fabs(yHPb); // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd double yLPa = Filter(y1, v1_LPa, v2_LPa, a1_LPa, a2_LPa, b0_LPa, b1_LPa, b2_LPa, gain_LPa); double yLPb = Filter(yLPa, v1_LPb, v2_LPb, a1_LPb, a2_LPb, b0_LPb, b1_LPb, b2_LPb, gain_LPb); y = yLPb; ymean = Meanvalue(y, sum, a, ymean, delay); //ymean = Meansmooth(y, samples_length, ymean); }