Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Filterdesigns.cpp@9:1655d67d8a53, 2015-10-07 (annotated)
- Committer:
- Bartvaart
- Date:
- Wed Oct 07 13:48:19 2015 +0000
- Revision:
- 9:1655d67d8a53
- Parent:
- 7:040591b3f019
- Child:
- 10:897db0bdb2fe
werkt niet met gemiddelde;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Bartvaart | 5:b400209df739 | 1 | #include "Filterdesigns.h" |
Bartvaart | 6:8197f9446daf | 2 | #include "Filter.h" |
Bartvaart | 6:8197f9446daf | 3 | |
Bartvaart | 7:040591b3f019 | 4 | // Inputwaardes |
Bartvaart | 7:040591b3f019 | 5 | // Filter1a: 50Hz Notch |
Bartvaart | 6:8197f9446daf | 6 | double v1_50a = 0, v2_50a = 0; |
Bartvaart | 6:8197f9446daf | 7 | const double a1_50a = -1.56858163817, a2_50a = 0.96424138921; |
Bartvaart | 6:8197f9446daf | 8 | const double b0_50a = 1.00000000000, b1_50a = -1.61854514265, b2_50a = 1.00000000000; |
Bartvaart | 6:8197f9446daf | 9 | const double gain_50a = 1.000000; |
Bartvaart | 6:8197f9446daf | 10 | |
Bartvaart | 6:8197f9446daf | 11 | // Filter1b: 50Hz Notch |
Bartvaart | 6:8197f9446daf | 12 | double v1_50b = 0, v2_50b = 0; |
Bartvaart | 6:8197f9446daf | 13 | const double a1_50b = -1.61100357834, a2_50b = 0.96592171046; |
Bartvaart | 6:8197f9446daf | 14 | const double b0_50b = 1.00000000000, b1_50b = -1.61854514265, b2_50b = 1.00000000000; |
Bartvaart | 6:8197f9446daf | 15 | const double gain_50b = 0.965081; |
Bartvaart | 6:8197f9446daf | 16 | |
Bartvaart | 5:b400209df739 | 17 | |
Bartvaart | 6:8197f9446daf | 18 | // Filter1: 20Hz HighPass |
Bartvaart | 6:8197f9446daf | 19 | double v1_HP = 0, v2_HP = 0; |
Bartvaart | 6:8197f9446daf | 20 | const double a1_HP = -0.76475499450, a2_HP = 0.27692273367; |
Bartvaart | 6:8197f9446daf | 21 | const double b0_HP = 1.00000000000, b1_HP = -2.00000000000, b2_HP = 1.00000000000; |
Bartvaart | 6:8197f9446daf | 22 | const double gain_HP = 0.510419; |
Bartvaart | 6:8197f9446daf | 23 | |
Bartvaart | 6:8197f9446daf | 24 | // Filter1: 5Hz LowPass |
Bartvaart | 6:8197f9446daf | 25 | double v1_LP = 0, v2_LP = 0; |
Bartvaart | 6:8197f9446daf | 26 | const double a1_LP = -1.16338171052, a2_LP = 0.42191097989; |
Bartvaart | 6:8197f9446daf | 27 | const double b0_LP = 1.00000000000, b1_LP = 2.00000000000, b2_LP = 1.00000000000; |
Bartvaart | 6:8197f9446daf | 28 | const double gain_LP = 0.064632; |
Bartvaart | 6:8197f9446daf | 29 | |
Bartvaart | 6:8197f9446daf | 30 | |
Bartvaart | 6:8197f9446daf | 31 | // constante variabelen: |
Bartvaart | 6:8197f9446daf | 32 | |
Bartvaart | 6:8197f9446daf | 33 | double gem = 0.4557; // gemiddelde waarde emgsignaal |
Bartvaart | 6:8197f9446daf | 34 | |
Bartvaart | 6:8197f9446daf | 35 | |
Bartvaart | 9:1655d67d8a53 | 36 | void Filterdesign1(double u, double &y) |
Bartvaart | 5:b400209df739 | 37 | { |
Bartvaart | 5:b400209df739 | 38 | //u = input waarde |
Bartvaart | 5:b400209df739 | 39 | //y = output waarde |
Bartvaart | 5:b400209df739 | 40 | |
Bartvaart | 7:040591b3f019 | 41 | u = u - gem; // lees waarde van emg signaal uit |
Bartvaart | 6:8197f9446daf | 42 | |
Bartvaart | 5:b400209df739 | 43 | // Op deze manier worden de waardes ingelezen in Filter. Zorg dus voor dezelfde volgorde, zodat de waardes goed uitgelezen worden!: |
Bartvaart | 5:b400209df739 | 44 | // 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) |
Bartvaart | 6:8197f9446daf | 45 | |
Bartvaart | 5:b400209df739 | 46 | // 50Hz Notch filter |
Bartvaart | 5:b400209df739 | 47 | double y50a = Filter(u, v1_50a, v2_50a, a1_50a, a2_50a, b0_50a, b1_50a, b2_50a, gain_50a); |
Bartvaart | 5:b400209df739 | 48 | double y50b = Filter(y50a, v1_50b, v2_50b, a1_50b, a2_50b, b0_50b, b1_50b, b2_50b, gain_50b); |
Bartvaart | 6:8197f9446daf | 49 | |
Bartvaart | 5:b400209df739 | 50 | // High Pass filter. Tot 20Hz wordt weggefliterd |
Bartvaart | 5:b400209df739 | 51 | double yHP = Filter(y50b, v1_HP, v2_HP, a1_HP, a2_HP, b0_HP, b1_HP, b2_HP, gain_HP); |
Bartvaart | 6:8197f9446daf | 52 | |
Bartvaart | 5:b400209df739 | 53 | // Absolute waarde wordt genomen. |
Bartvaart | 5:b400209df739 | 54 | double y1 = fabs(yHP); |
Bartvaart | 6:8197f9446daf | 55 | |
Bartvaart | 6:8197f9446daf | 56 | // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd |
Bartvaart | 5:b400209df739 | 57 | double yLP = Filter(y1, v1_LP, v2_LP, a1_LP, a2_LP, b0_LP, b1_LP, b2_LP, gain_LP); |
Bartvaart | 6:8197f9446daf | 58 | |
Bartvaart | 7:040591b3f019 | 59 | y = 10 * yLP; |
Bartvaart | 5:b400209df739 | 60 | } |