Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Diff: Filterdesigns.cpp
- Revision:
- 6:8197f9446daf
- Parent:
- 5:b400209df739
- Child:
- 7:040591b3f019
--- a/Filterdesigns.cpp Wed Oct 07 11:10:36 2015 +0000 +++ b/Filterdesigns.cpp Wed Oct 07 11:46:29 2015 +0000 @@ -1,32 +1,75 @@ #include "Filterdesigns.h" +#include "HIDScope.h" +#include "Filter.h" +#include "Meanvalue.h" + +AnalogIn emg(A0); //Analog input van emg kabels +HIDScope scope(3); //2 scopes + +double v1_50a = 0, v2_50a = 0; +const double a1_50a = -1.56858163817, a2_50a = 0.96424138921; +const double b0_50a = 1.00000000000, b1_50a = -1.61854514265, b2_50a = 1.00000000000; +const double gain_50a = 1.000000; + +// Filter1b: 50Hz Notch +double v1_50b = 0, v2_50b = 0; +const double a1_50b = -1.61100357834, a2_50b = 0.96592171046; +const double b0_50b = 1.00000000000, b1_50b = -1.61854514265, b2_50b = 1.00000000000; +const double gain_50b = 0.965081; + -void EMGfilter() +// Filter1: 20Hz HighPass +double v1_HP = 0, v2_HP = 0; +const double a1_HP = -0.76475499450, a2_HP = 0.27692273367; +const double b0_HP = 1.00000000000, b1_HP = -2.00000000000, b2_HP = 1.00000000000; +const double gain_HP = 0.510419; + +// Filter1: 5Hz LowPass +double v1_LP = 0, v2_LP = 0; +const double a1_LP = -1.16338171052, a2_LP = 0.42191097989; +const double b0_LP = 1.00000000000, b1_LP = 2.00000000000, b2_LP = 1.00000000000; +const double gain_LP = 0.064632; + + +// constante variabelen: + +double gem = 0.4557; // gemiddelde waarde emgsignaal + +//gemiddelde bepalen +double sum = 0; +double ymean = 0; +int a = 0; +int delay = 40; + + + +void Filterdesign1() { //u = input waarde //y = output waarde double u = emg.read() - 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); - + // High Pass filter. Tot 20Hz wordt weggefliterd double yHP = Filter(y50b, 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 + + // 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); - + double y = 10 * yLP; - - double ymean = Meanvalue(y, sum, a, ymean, delay); - + + ymean = Meanvalue(y, sum, a, ymean, delay); + // Plotten in HIDscope scope.set(0,u); //ongefilterde waarde naar scope 1 scope.set(1,y); //gefilterde waarde naar scope 2