Suspicious Person Detection via Position Tracking
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Solution Overview
Problem
Current entry-and-exit systems face challenges in balancing security and convenience, as they either provide high security by preventing unauthenticated individuals from entering a secure area but may incorrectly authenticate friends or acquaintances of authorized users, or allow unauthenticated individuals to enter when accompanying an authenticated user, compromising security.
Innovation Solution
A suspicious person detection device that includes a person detection unit, a person tracking unit, and a suspicious person detection unit, which tracks the position of individuals and issues an alarm when an accompanying person is at a predetermined distance or longer from an already-authenticated user, thereby distinguishing between authorized accompanying persons and potential intruders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entry-and-exit system authenticates all persons in the pre-designated area when the regular user is authenticated, then convenience is improved by allowing friends and acquaintances to enter without registration, but security deteriorates because invalid intruders near the regular user are also authenticated and cannot be detected later
Solution Approach 1:
The patent segments the authentication process into two distinct phases: (1) initial authentication of the regular user at the door, and (2) subsequent tracking-based verification of accompanying persons inside the secure area. This segmentation allows the system to authenticate the regular user while separately monitoring accompanying persons without granting them automatic authentication, thus resolving the contradiction between convenience and security.
Solution Approach 2:
The patent introduces a tracking system as an intermediary mechanism between authentication and access control. Instead of directly authenticating accompanying persons, the system uses continuous position tracking to verify their presence and movement patterns. This intermediary tracking mechanism enables the system to maintain security while allowing convenient access for legitimate accompanying persons.
2Reliability
If the entry-and-exit system detects unauthenticated persons passing through the door, then security is improved by identifying invalid passers, but convenience deteriorates by preventing accompanying persons from entering even when authenticated users are present
Solution Approach 1:
The patent applies dynamic tracking of person positions and movements after authentication. Instead of static access control that either allows or denies entry based on initial authentication, the system continuously monitors the positions and movement patterns of authenticated users and accompanying persons. This dynamic approach enables the system to distinguish between legitimate accompanying persons moving with authenticated users and unauthorized individuals, resolving the contradiction between security and convenience.
3Ease of operation
If the system uses a pre-designated area for accompanying persons, then ease of operation is improved by simplifying the authentication process, but measurement precision deteriorates because the system cannot accurately distinguish between valid and invalid persons in that area
Solution Approach 1:
The patent implements continuous feedback through tracking the positions and movement patterns of persons in the secure area. The system constantly monitors whether accompanying persons remain in appropriate proximity to authenticated users and whether their movement patterns are consistent with legitimate access. This feedback mechanism enables accurate distinction between valid and invalid persons while maintaining ease of operation through automatic monitoring.
Data Source
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AI summary
A suspicious person detection device is characterized in that the suspicious person detection device is provided with a person detection section capable of detecting the position of persons for each of the persons, a person tracing section for continuously tracing the position of a person detected by the person detection section, and a suspicious person detection section for detecting a suspicious person according to the result of the trace of the person tracing section, wherein the person tracing section determines a person authenticated as a result of the agreement with a predetermined first condition as an authenticated person and determines a person who has agreed with a predetermined second condition associated with the authenticated person as an accompanying person at the time of the authentication, and wherein the suspicious person detection section issues a warning when the accompanying person is away from the authenticated person by a predetermined first distance or more.