车祸最低门槛 [英] Minimum threshold for car accident

问题描述

我正在使用加速度计来检测车祸.我在检测车祸时需要最小阈值有问题.检测车祸所需的最低阈值.

I am using accelerometer to detect the car accident. I am having a problem with minimum threshold value is required to detect the car accident. What minimum threshold required to detect car accident.

@Override
public void onSensorChanged(SensorEvent event) {
    float x = event.values[0];
    float y = event.values[1];
    float z = event.values[2];

    float gX = x / 9.8f;
    float gY = y / 9.8f;
    float gZ = z / 9.8f;

    float gForce = FloatMath.sqrt(gX * gX + gY * gY + gZ * gZ);
    if(gForce > //HERE IS NEED THRESHOLD VALUE)
}

推荐答案

基于谷歌搜索，我估计峰值加速度幅度> 40G可能表明发生了车祸.请参阅此本文，以了解车祸期间数据的基础研究.

Based on Googling around, I'd estimate a peak acceleration magnitude of >40G would indicate a car crash. See this this paper for a basic study of data during car crashes.

或者，您可以自己撞死几辆汽车并获得一些测试数据. :)

Alternatively, you could crash a few cars yourself and get some test data. :)

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