Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Filterdesigns.cpp@19:6c0245063b96, 2015-10-13 (annotated)
- Committer:
- Bartvaart
- Date:
- Tue Oct 13 12:28:32 2015 +0000
- Revision:
- 19:6c0245063b96
- Parent:
- 18:eec0880fcded
- Child:
- 20:11e1244ad2ad
met extra filter voor trilling kabels;
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 | 13:b01231e0b743 | 5 | |
Bartvaart | 13:b01231e0b743 | 6 | |
Bartvaart | 13:b01231e0b743 | 7 | //Notch 50Hz |
Bartvaart | 13:b01231e0b743 | 8 | |
Bartvaart | 7:040591b3f019 | 9 | // Filter1a: 50Hz Notch |
Bartvaart | 6:8197f9446daf | 10 | double v1_50a = 0, v2_50a = 0; |
Bartvaart | 15:c1a8f28d6583 | 11 | const double a1_50a = -1.52337295428, a2_50a = 0.93195385841; |
Bartvaart | 15:c1a8f28d6583 | 12 | const double b0_50a = 1.00000000000, b1_50a = -1.61854514929, b2_50a = 1.0; |
Bartvaart | 6:8197f9446daf | 13 | const double gain_50a = 1.000000; |
Bartvaart | 6:8197f9446daf | 14 | |
Bartvaart | 6:8197f9446daf | 15 | // Filter1b: 50Hz Notch |
Bartvaart | 6:8197f9446daf | 16 | double v1_50b = 0, v2_50b = 0; |
Bartvaart | 15:c1a8f28d6583 | 17 | const double a1_50b = -1.60486796113, a2_50b = 0.93780356783; |
Bartvaart | 15:c1a8f28d6583 | 18 | const double b0_50b = 1.00000000000, b1_50b = -1.61854514929, b2_50b = 1.0; |
Bartvaart | 15:c1a8f28d6583 | 19 | const double gain_50b = 0.934872; |
Bartvaart | 6:8197f9446daf | 20 | |
Bartvaart | 19:6c0245063b96 | 21 | // Notch 0-20Hz |
Bartvaart | 19:6c0245063b96 | 22 | |
Bartvaart | 19:6c0245063b96 | 23 | // Filter2a: 0-20Hz Notch |
Bartvaart | 19:6c0245063b96 | 24 | double v1_020a = 0, v2_020a = 0; |
Bartvaart | 19:6c0245063b96 | 25 | const double a1_020a = -1.78180535801, a2_020a = 0.78747189013; |
Bartvaart | 19:6c0245063b96 | 26 | const double b0_020a = 1.00000000000, b1_020a = -1.99365972450, b2_020a = 1.0; |
Bartvaart | 19:6c0245063b96 | 27 | const double gain_020a = 0.893737; |
Bartvaart | 19:6c0245063b96 | 28 | |
Bartvaart | 19:6c0245063b96 | 29 | // Filter2b: 0-20Hz Notch |
Bartvaart | 19:6c0245063b96 | 30 | double v1_020b = 0, v2_020b = 0; |
Bartvaart | 19:6c0245063b96 | 31 | const double a1_020b = -1.75020314275, a2_020b = 0.80725578229; |
Bartvaart | 19:6c0245063b96 | 32 | const double b0_020b = 1.00000000000, b1_020b = -1.99365972450, b2_020b = 1.0; |
Bartvaart | 19:6c0245063b96 | 33 | const double gain_020b = 0.890775; |
Bartvaart | 19:6c0245063b96 | 34 | |
Bartvaart | 19:6c0245063b96 | 35 | // Filter2c: 0-20Hz Notch |
Bartvaart | 19:6c0245063b96 | 36 | double v1_020c = 0, v2_020c = 0; |
Bartvaart | 19:6c0245063b96 | 37 | const double a1_020c = -1.97815539898, a2_020c = 0.97877726519; |
Bartvaart | 19:6c0245063b96 | 38 | const double b0_020c = 1.00000000000, b1_020c = -1.99365972450, b2_020c = 1.0; |
Bartvaart | 19:6c0245063b96 | 39 | const double gain_020c = 0.990804; |
Bartvaart | 5:b400209df739 | 40 | |
Bartvaart | 13:b01231e0b743 | 41 | //HighPass 20Hz |
Bartvaart | 13:b01231e0b743 | 42 | |
Bartvaart | 13:b01231e0b743 | 43 | // Filter2a: 20Hz HighPass |
Bartvaart | 15:c1a8f28d6583 | 44 | double v1_HP = 0, v2_HP = 0; |
Bartvaart | 15:c1a8f28d6583 | 45 | const double a1_HP = 1.64732093404, a2_HP = 0.70900981120; |
Bartvaart | 15:c1a8f28d6583 | 46 | const double b0_HP = 1.00000000000, b1_HP = 2.0, b2_HP = 1.00000000000; |
Bartvaart | 15:c1a8f28d6583 | 47 | const double gain_HP = 0.84193; |
Bartvaart | 13:b01231e0b743 | 48 | |
Bartvaart | 6:8197f9446daf | 49 | |
Bartvaart | 13:b01231e0b743 | 50 | //LowPass 3Hz |
Bartvaart | 13:b01231e0b743 | 51 | |
Bartvaart | 13:b01231e0b743 | 52 | // Filter3a: 3Hz LowPass |
Bartvaart | 15:c1a8f28d6583 | 53 | double v1_LP = 0, v2_LP = 0; |
Bartvaart | 15:c1a8f28d6583 | 54 | const double a1_LP = -1.93503824887, a2_LP = 0.93708289663; |
Bartvaart | 15:c1a8f28d6583 | 55 | const double b0_LP = 1.00000000000, b1_LP = 2.0, b2_LP = 1.00000000000; |
Bartvaart | 15:c1a8f28d6583 | 56 | const double gain_LP = 0.000511; |
Bartvaart | 6:8197f9446daf | 57 | |
Bartvaart | 6:8197f9446daf | 58 | // constante variabelen: |
Bartvaart | 6:8197f9446daf | 59 | |
Bartvaart | 19:6c0245063b96 | 60 | double gem = 0.4557; // gemiddelde waarde emgsignaal |
Bartvaart | 6:8197f9446daf | 61 | |
Bartvaart | 17:cfe44346645c | 62 | double y=0; |
Bartvaart | 6:8197f9446daf | 63 | |
Bartvaart | 18:eec0880fcded | 64 | double Filterdesigns(double u, double ymin) |
Bartvaart | 5:b400209df739 | 65 | { |
Bartvaart | 5:b400209df739 | 66 | //u = input waarde |
Bartvaart | 5:b400209df739 | 67 | //y = output waarde |
Bartvaart | 16:8f175d2a472f | 68 | |
Bartvaart | 19:6c0245063b96 | 69 | u = u - gem; // zorgen dat bij geen signaal u = 0 |
Bartvaart | 16:8f175d2a472f | 70 | |
Bartvaart | 5:b400209df739 | 71 | // Op deze manier worden de waardes ingelezen in Filter. Zorg dus voor dezelfde volgorde, zodat de waardes goed uitgelezen worden!: |
Bartvaart | 5:b400209df739 | 72 | // 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 | 73 | |
Bartvaart | 5:b400209df739 | 74 | // 50Hz Notch filter |
Bartvaart | 5:b400209df739 | 75 | double y50a = Filter(u, v1_50a, v2_50a, a1_50a, a2_50a, b0_50a, b1_50a, b2_50a, gain_50a); |
Bartvaart | 5:b400209df739 | 76 | double y50b = Filter(y50a, v1_50b, v2_50b, a1_50b, a2_50b, b0_50b, b1_50b, b2_50b, gain_50b); |
Bartvaart | 6:8197f9446daf | 77 | |
Bartvaart | 19:6c0245063b96 | 78 | // 0-20Hz Notch filter |
Bartvaart | 19:6c0245063b96 | 79 | double y020a = Filter(y50a, v1_020a, v2_020a, a1_020a, a2_020a, b0_020a, b1_020a, b2_020a, gain_020a); |
Bartvaart | 19:6c0245063b96 | 80 | double y020b = Filter(y020a, v1_020b, v2_020b, a1_020b, a2_020b, b0_020b, b1_020b, b2_020b, gain_020b); |
Bartvaart | 19:6c0245063b96 | 81 | double y020c = Filter(y020b, v1_020c, v2_020c, a1_020c, a2_020c, b0_020c, b1_020c, b2_020c, gain_020c); |
Bartvaart | 19:6c0245063b96 | 82 | |
Bartvaart | 19:6c0245063b96 | 83 | |
Bartvaart | 5:b400209df739 | 84 | // High Pass filter. Tot 20Hz wordt weggefliterd |
Bartvaart | 15:c1a8f28d6583 | 85 | double yHP = Filter(y50b, v1_HP, v2_HP, a1_HP, a2_HP, b0_HP, b1_HP, b2_HP, gain_HP); |
Bartvaart | 6:8197f9446daf | 86 | |
Bartvaart | 5:b400209df739 | 87 | // Absolute waarde wordt genomen. |
Bartvaart | 15:c1a8f28d6583 | 88 | double y1 = fabs(yHP); |
Bartvaart | 6:8197f9446daf | 89 | |
Bartvaart | 6:8197f9446daf | 90 | // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd |
Bartvaart | 15:c1a8f28d6583 | 91 | double yLP = Filter(y1, v1_LP, v2_LP, a1_LP, a2_LP, b0_LP, b1_LP, b2_LP, gain_LP); |
Bartvaart | 6:8197f9446daf | 92 | |
Bartvaart | 16:8f175d2a472f | 93 | y = 10 * yLP; |
Bartvaart | 17:cfe44346645c | 94 | |
Bartvaart | 17:cfe44346645c | 95 | return y; |
Bartvaart | 5:b400209df739 | 96 | } |