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