In previous article I have described a concept of system that can be implemented already today and can save lots of lives as it is treating one of major risk factors of fatal car accidents – keeping a safe distance.
This part is an additional short elaboration on technical details:
Let’s see what are the variables that play in the model.
Pic. 1 – Rear Zone Visualization chart
h – The height of the visualization generator
d – The length of the Rear Zone visualization
α – The angle from the end of Rear Zone to the generator is a function of “h” and “d”
v – the velocity of the car at time t
φ – The angle of the car at time t
Tx – A set of different times such as Tb – baseline e.g. 1sec; Tc – conditional 1sec for example during the late night or after long drive or during rain/snow etc; Tm – manual adjustment based on personal assessment and confidence level -1sec to +1sec
The equation then would be something like this:
You can ask why to use derivation of the car angle for adjustment (or generally why need to add anything related to the angle of a car)?
While the vehicle is moving for a long time on an inclined surface, there is no need in adjustment of the angle, but at the first time of the angle change the light from the Rear Zone Visualization generator would point to a wrong direction and even dazzle the driver of the following car. That is why there is a need in short time angle change correction.
Pic. 2 – Inclined surface impact
At pic.1 there is an orange line (that actually is not visible) that is showing the Rear Zone intrusion detection. At the given distance within the Rear Zone (e.g. d/2) the sensor (similar to the parking assistance sensors) is providing a feedback to the system if a following car is too close. Next steps can be taken:
1. Rear Zone Visualization signalling – lines (or any other visualization type) would change the behavior (e.g blink or change form/color…) to signal about dangerous distance and Rear Zone violation.
2. In case of car slowing down, while the Rear Zone is violated (aka “closed”), the feedback (e.g. sound signal) would appear to the driver of the vehicle. It does not release the driver from looking into mirrors, but would give additional confidence level in avoidance from dangerous situations.