Android跌倒检测 [英] Android Fall detection
问题描述
我正在使用加速度传感器执行跌倒检测,并创建以下代码。
I am implementing the fall detection using accelerometer sensor, and create below code.
public void onSensorChanged(SensorEvent foEvent) {
if (foEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
double loX = foEvent.values[0];
double loY = foEvent.values[1];
double loZ = foEvent.values[2];
double loAccelerationReader = Math.sqrt(Math.pow(loX, 2)
+ Math.pow(loY, 2)
+ Math.pow(loZ, 2));
mlPreviousTime = System.currentTimeMillis();
Log.i(TAG, "loX : " + loX + " loY : " + loY + " loZ : " + loZ);
if (loAccelerationReader <= 6.0) {
moIsMin = true;
Log.i(TAG, "min");
}
if (moIsMin) {
i++;
Log.i(TAG, " loAcceleration : " + loAccelerationReader);
if (loAccelerationReader >= 30) {
long llCurrentTime = System.currentTimeMillis();
long llTimeDiff = llCurrentTime - mlPreviousTime;
Log.i(TAG, "loTime :" + llTimeDiff);
if (llTimeDiff >= 10) {
moIsMax = true;
Log.i(TAG, "max");
}
}
}
if (moIsMin && moIsMax) {
Log.i(TAG, "loX : " + loX + " loY : " + loY + " loZ : " + loZ);
Log.i(TAG, "FALL DETECTED!!!!!");
Toast.makeText(this, "FALL DETECTED!!!!!", Toast.LENGTH_LONG).show();
i = 0;
moIsMin = false;
moIsMax = false;
}
if (i > 5) {
i = 0;
moIsMin = false;
moIsMax = false;
}
}
}
它使我跌倒,但是,如果我骑马或跑步,也会使我跌倒。
its give me fall detected, but if i am riding or running it will also give me fall alert.
如果我从6英寸处扔出设备,则会显示警报。
if i throw device from 6 inch, alert shown.
我还看到灵敏度是特定于设备的。
I also see the sensitivity is device specific.
当我以相同的高度测试moto e和mi 4时
when i test moto e and mi 4 with same height
Moto e返回<$的最大32个值c $ c> loAccelerationReader
在mi 4中,它将为 loAccelerationReader
and in mi 4 it will return 60 value for loAccelerationReader
任何人都能以正确的方式帮助我。
can any one help me out for the correct way.
推荐答案
我有一些解决方案,不确定它是否适用于所有人,但是我正在使用下面的代码及其适用于我。
I got some solution not sure its work for all or not, but i am using below code and its working for me.
if (foEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
double loX = foEvent.values[0];
double loY = foEvent.values[1];
double loZ = foEvent.values[2];
double loAccelerationReader = Math.sqrt(Math.pow(loX, 2)
+ Math.pow(loY, 2)
+ Math.pow(loZ, 2));
DecimalFormat precision = new DecimalFormat("0.00");
double ldAccRound = Double.parseDouble(precision.format(loAccelerationReader));
if (ldAccRound > 0.3d && ldAccRound < 0.5d) {
//Do your stuff
}
}
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