Newfound Accuracy for Vehicles

Our years of research in wind tunnels, unparalleled expertise in CFD, and studying of historical and real time wind conditions led to Scout's proprietary design. A network of designated sensors can distinguish atmospheric wind from the pressure gradients on a vehicle, traffic-induced wind, and the surrounding terrain.

The Scout measures apparent wind, but can distinguish true wind speed from the wind generated by the moving vehicle. Apparent wind is the vector sum of the true wind and the wind a moving vehicle would experience in still air. Several sensors collect information about the vehicle speed and wind conditions to calculate the true wind speed. Details follow.

Wind Speed

Both wind speed and wind direction impact the aerodynamics of a vehicle. The combination of dynamic weather conditions and varying environment make knowledge of intermittent wind changes crucial for optimizing pacing strategies and time of travel for energy efficiency. 

Similar to wind speed, the true wind angle is affected by the wind generated by the moving vehicle. Our proprietary sensors measure apparent wind angle and the course of the vehicle to backcalculate the true wind angle. The unique sensor network and design of the Scout makes this possible.

Wind Angle

Both fuel efficiency and safety are affected by the temperature. Cold weather and winter driving conditions can reduce a vehicle's fuel economy by up to 20%. Also important is the temperature gradient of the road surface, which can decrease rolling friction and increase the likelihood and severity of accidents.

 

The Scout measures the air temperature and we use that information to calculate the impact on fuel economy and the slickness of the road surface. 

Temperature

Humidity has varying effects on fuel economy. For example, humidity changes the air density, which impacts aerodynamics. In winter conditions, it can influence the slickness of a road’s surface and increase safety concerns. Temperature, pressure and humidity are connected to precipitation, and measuring them allows us to anticipate when it will snow or rain. The Scout records this information and we use it to aftcast, or correct historical data, and train our models to better predict precipitation probabilities in the future.

Humidity

The speed of a vehicle is instrumental in mathematically determining the atmospheric wind conditions. Tracking and recording vehicle speed also provides useful information about the performance of the vehicle in varying weather and traffic conditions.

Ground Speed

The direction of a vehicle is important to backcalculate the wind speed and wind direction. It also provides crucial information to enhance our deduced reckoning algorithms.

Ground Course

High precision acceleration is crucial for recording the road surface roughness. Through extensive testing, we can determine the location of potholes and bumpy road sections along a route. Acceleration is also used to determine the efficiency and driving behavior as speed and road conditions change. It is used for turn detection, and accident analysis. Scout's ability to understand the combination of acceleration and wind partitioning has led to its high accuracy vehicle positioning.

XYZ Acceleration

The position of a vehicle is recorded via GPS tracking. And we take other sensors into account to provide a more precision service that can determine the location of the vehicle to a much higher degree of accuracy.

Position

Atmospheric pressure is dependent on altitude, temperature, and humidity. As altitude increases, pressure decreases. However, it is necessary to know both temperature and humidity to make an accurate atmospheric pressure calculation. Scout can use all of the data it records to make predictions of weather changes and calculate elevation variance along a route.

Pressure

Altitude and elevation variance are important for the efficiency of a vehicle and are used in our Adaptive Cruise Control algorithm. The altitude of the vehicle is recorded by Scout via GPS satellite connectivity and other data sources, such as atmospheric pressure.

Altitude