我的位置正在使用 altbeacon android studio 在我不移动的情况下更新

Question

我有一个奇怪的 problem.My 位置在我不移动的情况下更新，并且从我的 phone 到其他信标的距离也在我不移动的情况下发生变化。这是最初计算我的位置的位置：

public void onBeaconServiceConnect() {
        RangeNotifier rangeNotifier = new RangeNotifier() {
            @Override
            public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
                int beacon_number = beacons.size();
              Beacon[] beacon_array = beacons.toArray(new Beacon[beacons.size()]);
                Beacon device1 = null, device2 = null, device3 = null;
                Constants constants = new Constants();
                double RSSI1Unfiltered = 0;
                float txPow1 = 0;
                double RSSI2Unfiltered = 0;
                float txPow2 = 0;
                double RSSI3Unfiltered = 0;
                float txPow3 = 0;
                if (beacon_number == 3) {
                 //Beacon[] beacon_array = beacons.toArray(new Beacon[beacons.size()]);
                    if (beacon_array[0].getIdentifier(0).toString().equals(Constants.DEVICE1_UUID))    {
                        device1 = beacon_array[0];
                        Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE1 = BEACON ARRAY 0 ");
                    }  else  if (beacon_array[1].getIdentifier(0).toString().equals(Constants.DEVICE1_UUID)) {
                        device1 = beacon_array[1];
                        Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE1 = BEACON ARRAY 1 ");
                    }   else {
                        device1 = beacon_array[2];
                        Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE1 = BEACON ARRAY 2 ");
                    }
                     if (beacon_array[0].getIdentifier(0).toString().equals(Constants.DEVICE2_UUID)) {
                            device2 = beacon_array[0];
                            Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE2 = BEACON ARRAY 0 ");
                    }  else  if (beacon_array[1].getIdentifier(0).toString().equals(Constants.DEVICE2_UUID)) {
                        device2 = beacon_array[1];
                        Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE2= BEACON ARRAY 1 ");
                    }    else {
                        device2 = beacon_array[2];
                        Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE2 = BEACON ARRAY 2 ");

                    }
                     if (beacon_array[0].getIdentifier(0).toString().equals(Constants.DEVICE3_UUID)) {
                         device3 = beacon_array[0];
                         Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE3 = BEACON ARRAY 0");
                     }  else  if (beacon_array[1].getIdentifier(0).toString().equals(Constants.DEVICE3_UUID)){
                         device3 = beacon_array[1];
                         Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE3 = BEACON ARRAY 1 ");
                     }   else {
                         device3 = beacon_array[2];
                         Log.d(TAG,"NOW I AM TAKING VALUE FOR DEVICE3 = BEACON ARRAY 2 ");
                     }
                        RSSI1Unfiltered = device1.getRssi();
                        RSSI2Unfiltered = device2.getRssi();
                        RSSI3Unfiltered = device3.getRssi();

                        txPow1 = device1.getTxPower();
                        txPow2 = device2.getTxPower();
                        txPow3 = device3.getTxPower();

                        double dis1 = locationFinder.calculateDistance(txPow1,RSSI1Unfiltered);
                        double dis2 = locationFinder.calculateDistance(txPow2,RSSI2Unfiltered);
                        double dis3 = locationFinder.calculateDistance(txPow3,RSSI3Unfiltered);

                        Log.d(TAG, "TxPower of " + beacon_array[0].getIdentifier(0) + "is " + txPow1 + " and RSSI is : " + RSSI1Unfiltered + " and is at " + dis1 + "   " + device1.getIdentifier(0));
                        Log.d(TAG, "TxPower of " + beacon_array[1].getIdentifier(0) + "is " + txPow2 + " and RSSI is : " + RSSI2Unfiltered + " and is at " + dis2 + " " + device2.getIdentifier(0));
                        Log.d(TAG, "TxPower of " + beacon_array[2].getIdentifier(0) + "is " + txPow3 + " and RSSI is : " + RSSI3Unfiltered + " and is at " + dis3 + " " + device3.getIdentifier(0));

                        RunningAverageRssiFilter.setSampleExpirationMilliseconds(3000l);

                         //pass location!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
                          center = locationFinder.findLocation(RSSI1Unfiltered, txPow1, RSSI2Unfiltered, txPow2, RSSI3Unfiltered, txPow3);

                          sendCurrentLocation(center);

                          Log.d(TAG, "beacon in reagion" + beacons.size());

                          Log.d(TAG, "Current coordinates: asta e asta e !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! " + center.toString());

             }

这里我正在计算我的位置，logcat 是这样的： Logcat for this

我觉得这个class也很有用展示:

public class Constants {

    
    public static final LatLng DEVICE1_COORDINATES = new LatLng(47.686192, 22.479419);
    public static final String DEVICE1_UUID = "330d6309-e7b1-42f0-a7d5-0306c1ea1d69";


    public static final LatLng DEVICE2_COORDINATES = new LatLng(47.686174,22.479376);
    public static final String DEVICE2_UUID = "f159a8d4-2a61-4a66-b61a-da84353ad9d6";

  
    public static final LatLng DEVICE3_COORDINATES = new LatLng(47.686141,22.479448 );
    public static final String DEVICE3_UUID = "4cc54d62-2403-443b-89b6-2282490ab3c0";

}

所以我的问题是，代码的问题还是beacon技术。

Answer 1

所以使用 RSSI 来计算距离和位置是很棘手的。 RSSI 非常喜怒无常，甚至在桌子上移动你的手，移动咖啡杯等都会导致 RSSI 值从信标发生变化，从而使它看起来像你在移动。

我做的一个测试是将我的手放在信标和接收器之间，由于手的吸收因素，您会看到 RSSI 值大大降低。

不幸的是，我还没有找到稳定 RSSI 的距离和位置的方法，但我正在研究三角测量的飞行时间测量，希望信标将击中多个接收器，然后可以从中计算.

希望这能解决一些问题。

我的位置正在使用 altbeacon android studio 在我不移动的情况下更新

My location is updating without me moving using altbeacon android studio

java

android

if-statement

localization

bluetooth