Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Diff: Filterdesigns.cpp
- Revision:
- 19:6c0245063b96
- Parent:
- 18:eec0880fcded
- Child:
- 20:11e1244ad2ad
--- a/Filterdesigns.cpp Mon Oct 12 10:14:18 2015 +0000 +++ b/Filterdesigns.cpp Tue Oct 13 12:28:32 2015 +0000 @@ -18,6 +18,25 @@ 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 @@ -38,7 +57,7 @@ // constante variabelen: -//double gem = 0.4557; // gemiddelde waarde emgsignaal +double gem = 0.4557; // gemiddelde waarde emgsignaal double y=0; @@ -47,7 +66,7 @@ //u = input waarde //y = output waarde - u = u - ymin; // zorgen dat bij geen signaal u = 0 + 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) @@ -56,6 +75,12 @@ 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(y50b, v1_HP, v2_HP, a1_HP, a2_HP, b0_HP, b1_HP, b2_HP, gain_HP);