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Adjustable threshold for forward collision warning system

A threshold and difference technology, applied in the field of adjustable threshold, can solve the problem of insufficient conditions of collision threshold

Active Publication Date: 2014-12-24
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when experiencing particularly adverse conditions, the two-second period that would normally be appropriate is insufficient for the conditions of the crash threshold

Method used

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  • Adjustable threshold for forward collision warning system
  • Adjustable threshold for forward collision warning system
  • Adjustable threshold for forward collision warning system

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Embodiment Construction

[0014] The present invention uses systems and sensors typically already present in the vehicle to estimate current driving conditions. Parameters examined include vehicle load (e.g., number of passengers, cargo, trailer being towed, etc.) and vehicle-road interactions (e.g., change in friction). Information gathered on these parameters is used to decide whether default settings such as time-to-collision thresholds should be changed in driver assistance systems such as forward collision warning systems, adaptive cruise control systems, or brake-steering systems .

[0015] now refer to figure 1 , a host vehicle 10 traveling on a multi-lane highway 11 is equipped with a remote vehicle sensing and tracking system 12 . In field of view 13 , tracking system 12 is monitoring target vehicles 14 , 15 and 16 . For each target being tracked, a set of parameters characterizing the type and behavior of each target is determined and made available to other systems. For example, paramet...

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Abstract

A driver assistance system for a motor vehicle monitors approaching objects around the vehicle in order to take a driver assistance action in response to a predicted impact with an approaching object according to a time-to-impact threshold. The time-to-impact threshold includes a nominal or default value that is adjusted according to several different measures of vehicle and driving conditions. Respective offsets determined by a load monitor, a braking monitor, and a steering monitor are added to the threshold in response to measured vehicle performance parameters being different from expected values. The driver assistance action may be a perceptible warning for a forward collision warning system, a speed reduction in an adaptive cruise control system, or a braking action in a brake-steer system.

Description

technical field [0001] The present invention relates generally to collision warning and avoidance systems for motor vehicles, and, more particularly, to adjustable thresholds for initiating driver assistance actions in response to a predicted collision. Background technique [0002] Many different types of driver assistance systems have been developed that involve remote sensing and tracking of other vehicles or objects that may approach or collide with the host vehicle. Scanning radar systems, optical imaging-based recognition systems, or a combination of the two are typically used to locate objects of interest, determine their relative speeds and travel paths, and predict if and when vehicles will remain on their current trajectory collision. Driver assistance systems can simply warn the driver in the forward collision warning (FCM) system, thus allowing the driver to determine and execute any necessary evasive maneuvers. Other types of driver assistance systems, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/00B60W40/105B60W40/10B60R16/023
CPCB60W30/08B60W40/02B60W40/105B60W40/114B60W40/13B60W50/14B60W2520/10B60W2520/06B60W2554/801B60W30/162B60W2520/28B60W2520/30B60W2540/18G08G1/166B60W30/095B60W30/09B60W2554/80B60W2554/00B60W30/10G08G1/16B60W2554/804B60W2554/806B60W2554/802
Inventor 威尔福德·特伦特·约普
Owner FORD GLOBAL TECH LLC
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