Active Notice Signaling for Pedestrian Detection in Adverse Conditions
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Solution Overview
Problem
Conventional cognitive sensors in advanced driver assistance systems face limitations such as sensing inaccuracy and environmental interference, leading to reduced recognizability and identifiability of pedestrians and obstacles, especially in adverse conditions, which increases the risk of accidents.
Innovation Solution
An active notice device that receives signals from surrounding vehicles' cognitive sensors, analyzes and amplifies them, and transmits the amplified signals to the vehicle's sensors, enhancing recognizability and identifiability of pedestrians and obstacles through a combination of active and passive sensors, even in adverse conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cognitive sensors (camera, ultrasonic sensor, radar sensor, LiDAR sensor) are used to detect surrounding environment, then the vehicle can perform sensing and recognizing tasks for the surrounding environment, but the time required to recognize the obstacle such as the pedestrian and safely stop is shortened as recognizability or identifiability is deteriorated due to sensing inaccuracy or malfunction
Solution Approach 1:
The patent introduces an active notice device as an intermediary between the pedestrian/obstacle and the vehicle's cognitive sensors. This device actively transmits notification signals to the vehicle when detecting that the vehicle is approaching a pedestrian or obstacle, especially in blind spots or adverse conditions where conventional sensors fail. This intermediary system bridges the detection gap, providing timely information to reduce recognition time and improve measurement precision of obstacle presence.
2Reliability
If passive sensors (camera) are used for detection, then the system can operate without emitting signals, but the sensors hardly recognize or identify the pedestrian or the obstacle when smooth visibility is not secured at night or due to rain, snow, or fog
Solution Approach 1:
The patent converts the limitation of passive sensors in adverse weather into an opportunity by deploying an active notice device that emits notification signals. These active signals penetrate adverse weather conditions (rain, snow, fog, night) that block passive optical sensors. The harmful effect of weather blocking visibility is compensated by using active electromagnetic or acoustic signals that can traverse these conditions, transforming the detection weakness into a solvable problem through active transmission.
3Measurement precision
If active sensors (ultrasound, radar, LiDAR) are used to enhance detection capability, then the sensing ability can be improved, but the active sensors also rapidly lose sensing ability when smooth visibility is not secured due to weakening of the strength of a signal such as a frequency for recognizing and identifying the pedestrian or the obstacle
Solution Approach 1:
The active notice device serves as a mediator that receives signals from the vehicle's active sensors and re-transmits amplified notification signals back to the vehicle. This intermediary function compensates for signal weakening in adverse conditions by actively regenerating and re-transmitting the detection signals, ensuring reliable communication between the obstacle detection system and the vehicle's sensor suite even when direct sensing ability deteriorates.
Data Source
AI summary
An active notice device according to an embodiment includes a signal receiver configured to receive a signal generated by the active sensor of the surrounding vehicle, a signal analyzer configured to analyze characteristics of the signal received by the signal receiver, an information generator configured to generate information recognizable by the surrounding vehicle according to user setting, a signal generator configured to amplify and generate characteristics of the signal analyzed by the signal analyzer using the information generated by the information generator, and a signal transmitter configured to transmit the signal amplified and generated by the signal generator to an active sensor of the surrounding vehicle corresponding thereto.