Digital Key Position Fusion Using UWB and Vehicle Object Sensors
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Solution Overview
Problem
Existing vehicle positioning systems using ultra wide band (UWB) communication face inaccuracies due to external noise interference and are unreliable when users approach on bicycles, motorcycles, or scooters, making it difficult to determine the presence of a digital key accurately.
Innovation Solution
Combining sensor-based positioning technology using autonomous vehicle sensors (cameras, radar, lidar) with UWB-based positioning to enhance accuracy and reliability by classifying objects, generating moving object lists, and performing Bluetooth and UWB communication to determine the digital key's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UWB communication is used for positioning, then positioning can be performed without additional sensors, but positioning accuracy deteriorates due to external noise interference
Solution Approach 1:
The patent combines UWB communication-based positioning with sensor-based positioning (using cameras, radars, and lidars) to create a fusion positioning system. This merging of two different positioning approaches allows the system to leverage the advantages of both methods while compensating for their individual weaknesses, particularly improving accuracy in environments with external noise interference
2Ease of manufacture
If UWB communication data is used alone, then positioning is simple to implement, but positioning reliability deteriorates when users approach on bicycles, motorcycles, or scooters
Solution Approach 1:
The system merges UWB communication data with sensor data from autonomous vehicle sensors to determine digital key positioning. By combining these data sources, the system achieves more reliable positioning for users approaching on bicycles, motorcycles, or scooters, as the sensor data provides additional verification beyond what UWB communication alone can provide
3Measurement precision
If sensor-based positioning is used, then positioning accuracy improves, but device complexity increases due to additional sensors
Solution Approach 1:
The patent leverages the autonomous vehicle sensors (cameras, radars, lidars) that already exist for other vehicle functions and applies them to positioning as well. This multi-functional use of existing sensors improves positioning accuracy without significantly increasing overall system complexity, as these sensors are already part of the vehicle's autonomous driving system
Data Source
AI summary
A vehicle may include: an autonomous vehicle sensor configured to detect an object located around the vehicle; an ultra wide band (UWB) module configured to receive a UWB signal transmitted from a digital key; and a controller configured to be electrically connected to the UWB module. The controller is configured to obtain sensor-based positioning information of the object located around the vehicle based on sensor data obtained by the autonomous vehicle sensor, obtain UWB-based positioning information of the digital key based on the UWB signal received in the UWB module, determine a position of the digital key based on the sensor-based positioning information of the object and the UWB-based positioning information of the digital key, and control the vehicle based on the determined position of the digital key.