Piezoresistive Breathing Sensing System with 3D Printed Wearable Casing

Table 4

Maximum structural relative errors (%) for Algorithm 2 (down and up), considering the time window error and the quantization error for extreme cases. If a single value is provided, it is because the up and down errors are the same.

Window (s)	10 BPM	12.5 BPM	15 BPM	17.5 BPM	20 BPM	22.5 BPM
6	-50, 50	20.0	0.0	-14.3	-25, 25	11.1
7	28.6	2.9	-14.3	22.4	7.1	-4.8
8	12.5	-10.0	-25, 25	7.1	-6.3	-16.7, 16.7
9	0.0	-20.0	11.1	-4.8	-16.7, 16.7	3.7
10	-10.0	20.0	0.0	-14.3	5.0	-6.7
11	-18.2	9.1	-9.1	9.1	-4.5	9.1
12	-25, 25	0.0	-16.7, 16.7	0.0	-12.5, 12.5	0.0
13	15.4	-7.7	7.7	-7.7	3.8	-7.7
14	7.1	-14.3	0.0	10.2	-3.6	4.8
15	0.0	12.0	-6.7	2.9	-10, 10	-2.2
16	-6.3	5.0	-12.5, 12.5	-3.6	3.1	-8.3, 8.3
17	-11.8	-1.2	5.9	-9.2	-2.9	2.0
18	-16.7, 16.7	-6.7	0.0	4.8	-8.3, 8.3	-3.7
19	10.5	-11.6	-5.3	-0.8	2.6	5.3
20	5.0	8.0	-10, 10	-5.7	-2.5	0.0
21	0.0	2.9	4.8	6.1	-7.1, 7.1	-4.8
22	-4.5	-1.8	0.0	1.3	2.3	3.0
23	-8.7	-6.1	-4.3	-3.1	-2.2	-1.4
24	-12.5, 12.5	-10, 10	-8.3, 8.3	-7.1, 7.1	-6.3, 6.3	-5.6, 5.6
25	8.0	5.6	4.0	2.9	2.0	1.3
26	3.8	1.5	0.0	-1.1	-1.9	-2.6
27	0.0	-2.2	-3.7	-4.8	-5.6, 5.6	3.7
28	-3.6	-5.7	-7.1, 7.1	4.1	1.8	0.0
29	-6.9	7.6	3.4	0.5	-1.7	-3.4
30	-10, 10	4.0	0.0	-2.9	-5, 5	2.2