Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Filterdesigns.cpp
- Committer:
- Bartvaart
- Date:
- 2015-10-14
- Revision:
- 20:11e1244ad2ad
- Parent:
- 19:6c0245063b96
- Child:
- 21:8fe8419de3e9
File content as of revision 20:11e1244ad2ad:
#include "Filterdesigns.h" #include "Filter.h" // Inputwaardes //Notch 50Hz // Filter1a: 50Hz Notch double v1_50a = 0, v2_50a = 0; const double a1_50a = -1.52337295428, a2_50a = 0.93195385841; const double b0_50a = 1.00000000000, b1_50a = -1.61854514929, b2_50a = 1.0; const double gain_50a = 1.000000; // Filter1b: 50Hz Notch double v1_50b = 0, v2_50b = 0; const double a1_50b = -1.60486796113, a2_50b = 0.93780356783; const double b0_50b = 1.00000000000, b1_50b = -1.61854514929, b2_50b = 1.0; const double gain_50b = 0.934872; // Notch 0-20Hz // Filter2a: 0-20Hz Notch double v1_020a = 0, v2_020a = 0; const double a1_020a = -1.78180535801, a2_020a = 0.78747189013; const double b0_020a = 1.00000000000, b1_020a = -1.99365972450, b2_020a = 1.0; const double gain_020a = 0.893737; // Filter2b: 0-20Hz Notch double v1_020b = 0, v2_020b = 0; const double a1_020b = -1.75020314275, a2_020b = 0.80725578229; const double b0_020b = 1.00000000000, b1_020b = -1.99365972450, b2_020b = 1.0; const double gain_020b = 0.890775; // Filter2c: 0-20Hz Notch double v1_020c = 0, v2_020c = 0; const double a1_020c = -1.97815539898, a2_020c = 0.97877726519; const double b0_020c = 1.00000000000, b1_020c = -1.99365972450, b2_020c = 1.0; const double gain_020c = 0.990804; //HighPass 20Hz // Filter2a: 20Hz HighPass double v1_HP = 0, v2_HP = 0; const double a1_HP = 1.64732093404, a2_HP = 0.70900981120; const double b0_HP = 1.00000000000, b1_HP = 2.0, b2_HP = 1.00000000000; const double gain_HP = 0.84193; //LowPass 3Hz // Filter3a: 3Hz LowPass double v1_LP = 0, v2_LP = 0; const double a1_LP = -1.93503824887, a2_LP = 0.93708289663; const double b0_LP = 1.00000000000, b1_LP = 2.0, b2_LP = 1.00000000000; const double gain_LP = 0.000511; // constante variabelen: double gem = 0.4557; // gemiddelde waarde emgsignaal double y=0; double Filterdesigns(double u) { //u = input waarde //y = output waarde u = u - gem; // zorgen dat bij geen signaal u = 0 // 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); // 0-20Hz Notch filter double y020a = Filter(y50a, v1_020a, v2_020a, a1_020a, a2_020a, b0_020a, b1_020a, b2_020a, gain_020a); double y020b = Filter(y020a, v1_020b, v2_020b, a1_020b, a2_020b, b0_020b, b1_020b, b2_020b, gain_020b); double y020c = Filter(y020b, v1_020c, v2_020c, a1_020c, a2_020c, b0_020c, b1_020c, b2_020c, gain_020c); // High Pass filter. Tot 20Hz wordt weggefliterd double yHP = Filter(y020c, v1_HP, v2_HP, a1_HP, a2_HP, b0_HP, b1_HP, b2_HP, gain_HP); // Absolute waarde wordt genomen. double y1 = fabs(yHP); // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd double yLP = Filter(y1, v1_LP, v2_LP, a1_LP, a2_LP, b0_LP, b1_LP, b2_LP, gain_LP); y = 10 * yLP; return y; }