ECG 心率计算

1import java.util.LinkedList;
2import java.util.List;
3
4public class EcgUtils
5{
6    /**
7     * 获取频率
8     *
9     * @param data       所有的数据 20秒的数据
10     * @param hz         采集的频率
11     * @param max_num    波峰的代表值
12     * @param min_num    波谷的代表值
13     * @param check_time 一次计算的时间，会根据这个数据进行切割 [1-5秒的数据][2-6秒的数据][3-7秒的数据]
14     * @param onResult   计算结果的回调
15     * @return
16     */
17    public static void getRateCount(int[] data, int hz, int max_num, int min_num, int check_time, OnResult onResult)
18    {
19        if (data.length < hz * check_time) throw new RuntimeException("长度不足支持计算");
20
21        List<int[]> datas = new LinkedList<>();
22
23        for (int i = 0; i < data.length; i++)
24        {
25            int[] p_data = new int[hz * check_time];
26            for (int j = 0; j < p_data.length; j++)
27            {
28                if (i + j < data.length)
29                    p_data[j] = data[i + j];
30                else
31                    p_data[j] = 0;
32            }
33            datas.add(p_data);
34            if (i + hz < data.length)
35                i += hz;
36            else
37                i = data.length - 1;
38        }
39        for (int[] p_data : datas)
40        {
41            int first_index = -1;
42            int last_index = p_data.length;
43            int cha = 0;
44            int count = 0;
45            boolean findNext = true;
46            for (int i = 0; i < p_data.length; i++)
47            {
48                int num = p_data[i];
49                // 一次
50                if (num >= max_num && findNext)
51                {
52                    count++;
53                    findNext = false;
54
55                    if (first_index == -1)
56                    {
57                        first_index = i;
58                    }
59                    last_index = i;
60                } else if (num <= min_num && !findNext)
61                {
62                    findNext = true;
63                }
64            }
65
66            if (onResult != null)
67            {
68                if (last_index - first_index == 0)
69                {
70                    cha = 1;
71                } else
72                {
73                    cha = last_index - first_index;
74                }
75                System.out.print("hz=" + hz + " ");
76                System.out.print("check_time=" + check_time + " ");
77                System.out.print("count=" + count + " ");
78                System.out.print("cha=" + cha + " ");
79                onResult.onResult((60 * hz) * (count - 1) / cha);
80            }
81        }
82    }
83
84    interface OnResult
85    {
86	// 计算心率的结果
87        void onResult(int value);
88    }
89}