列车状态中的阻力和速度改为浮点数；

protos/device_state.proto

@@ -89,27 +89,27 @@ message TrainState{
   //列车当前运行方向,1 =上行true 0 =下行false
   bool runningUp = 11;
   //实际运行阻力（总）,1=1KN
-  int32 runningResistanceSum = 12;
+  float runningResistanceSum = 12;
   //阻力1（空气阻力）,1=1KN
-  int32 airResistance = 13;
+  float airResistance = 13;
   //阻力2（坡道阻力）,1=1KN
-  int32 rampResistance = 14;
+  float rampResistance = 14;
   //阻力3（曲线阻力）,1=1KN
-  int32 curveResistance = 15;
+  float curveResistance = 15;
   //列车运行速度,1=1km/h
-  int32 speed = 16;
+  float speed = 16;
   //头车速传1速度值,1=1km/h
-  int32 headSensorSpeed1 = 17;
+  float headSensorSpeed1 = 17;
   //头车速传2速度值,1=1km/h
-  int32 headSensorSpeed2 = 18;
+  float headSensorSpeed2 = 18;
   //尾车速传1速度值,1=1km/h
-  int32 tailSensorSpeed1 = 19;
+  float tailSensorSpeed1 = 19;
   //尾车速度2速度值,1=1km/h
-  int32 tailSensorSpeed2 = 20;
+  float tailSensorSpeed2 = 20;
   //头车雷达速度值,1=1km/h
-  int32 headRadarSpeed = 21;
+  float headRadarSpeed = 21;
   //尾车雷达速度值,1=1km/h
-  int32 tailRadarSpeed = 22;
+  float tailRadarSpeed = 22;
   //列车长度,1=1mm
   int64 trainLength = 23;
   //列车是否显示