Android跌倒检测

我正在使用加速度传感器实现跌倒检测,并创建以下代码.

  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;
            }
        }        
}

它会检测到我摔倒的情况,但是如果我骑马或跑步,它也会给我摔倒的警报.

如果我从6英寸处扔出设备,则会显示警报.

我还看到灵敏度是特定于设备的.

当我以相同的高度测试moto e和mi 4时

Moto e返回loAccelerationReader的最大32值

在mi 4中,它将为loAccelerationReader返回60值

任何人都可以以正确的方式帮助我.

解决方法:

我得到一些解决方案,不确定它是否适用于所有功能,但是我正在使用下面的代码及其适用于我.

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
        }
   }

标签：android-sensors,android,accelerometer
来源： https://codeday.me/bug/20191012/1897950.html