Social Distance Announcement System Using Group Detection
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Solution Overview
Problem
Existing methods for ensuring social distance in public places fail to accurately distinguish between individuals and groups that do not need to maintain social distance, such as pairs or groups acting in line, leading to ineffective announcement of social distance compliance.
Innovation Solution
An annunciation method that uses position information to determine if two objects form a group based on proximity, setting a first threshold for grouping and a second threshold for social distance announcement, and provides visual or auditory feedback accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If detection is performed on each individual person, then the detection process is simple, but groups that do not need to keep social distance (e.g., wheelchair user and assistant, parent and child) are incorrectly identified as violating social distance
Solution Approach 1:
The patent merges multiple detected objects into a single group when they satisfy specific conditions (distance threshold, movement correlation, temporal continuity). This combining approach allows the system to treat groups like wheelchair users and assistants as a single unit, preventing false social distance violations while maintaining detection simplicity.
Solution Approach 2:
The patent introduces multiple parameters beyond simple distance measurement, including relative movement velocity, detection continuity time, and group formation thresholds. By changing from a single-distance parameter to multiple parameters, the system can accurately distinguish between intentional close contact (groups) and accidental proximity, resolving the accuracy issue.
2Measurement precision
If multiple parameters are used to identify groups, then group identification accuracy improves, but the system complexity increases
Solution Approach 1:
The patent segments the group identification process into distinct modules: detection module, distance calculation module, group determination module, and announcement module. Each module handles a specific function, making the complex system manageable and maintainable while achieving high identification accuracy through coordinated operation of these segmented components.
Solution Approach 2:
The patent performs preliminary actions by pre-setting threshold values for group formation (distance threshold, time threshold, velocity threshold) before actual detection begins. This preliminary configuration allows the system to handle complex multi-parameter analysis without real-time computational complexity, as the decision logic is predetermined based on these thresholds.
3Object-affected harmful factors
If social distance is enforced for all detected objects, then infectious disease prevention is maximized, but legitimate groups (wheelchair users, families) are incorrectly penalized
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors group formation and dissolution, adjusting announcements based on whether objects remain in group status or separate. This feedback loop ensures that legitimate groups receive no false warnings while individuals who separate from groups are appropriately notified to maintain social distance, balancing disease prevention with flexibility.
Solution Approach 2:
The patent applies different quality rules to different spatial relationships: within-group objects are allowed close proximity without announcements, while between-group objects trigger social distance announcements. This local differentiation of quality rules allows the system to maximize disease prevention for inter-group interactions while providing flexibility for intra-group contacts, resolving the contradiction.
Data Source
AI summary
An annunciation method includes the steps of obtaining first position information as position information of a place where a first object is located, obtaining second position information as position information of a place where a second object is located, obtaining third position information as position information of a place where a third object is located, setting the first object and the second object as a first group when a distance between the first object and the second object calculated based on the first position information and the second position information is smaller than or equal to a first threshold value, obtaining fourth position information representing a position of the first group, and performing annunciation when a distance between the third object and the first group calculated based on the third position information and the fourth position information is smaller than a second threshold value.