Wearable Device Tamper Detection via Segmented Conductive Channels
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Solution Overview
Problem
Current wearable tracking devices, such as ankle bracelets and wristbands, can be easily tampered with or removed without triggering an alarm due to their design, which relies on optical or electrical connections that can be bypassed or cut, leading to security vulnerabilities.
Innovation Solution
A wearable device with a flexible member featuring conducting channels and mechanical connection holes, where a connector with multiple projecting members engages with these holes to form specific channel connections, and an electronic circuit compares these connections to predetermined patterns, sending an alarm signal if tampering is detected, thereby enhancing security and preventing unauthorized removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple optical or electrical connection is used in the strap, then the device is easier to manufacture and operate, but the security against tampering and removal is compromised
Solution Approach 1:
The connector is divided into multiple projecting members (at least three) that engage with corresponding holes in the strap. Each projecting member creates a separate conducting channel connection, segmenting the security verification into multiple independent pathways that must all be maintained for the device to function normally.
Solution Approach 2:
The conducting channels are pre-configured to connect specific projecting members to specific strap holes in a predetermined pattern. This preliminary arrangement ensures that any attempt to remove or tamper with the device will disrupt the pre-established conductive pathways, triggering an alarm before the device can be successfully removed.
2Adaptability or versatility
If the strap length is fixed, then the manufacturing process is simpler, but the device cannot be fitted to a range of subjects
Solution Approach 1:
The strap is designed with multiple holes at different positions along its length, allowing it to be segmented into different effective lengths. The connector engages with specific combinations of these holes to achieve the required strap length, providing adaptability without requiring multiple fixed-length straps to be manufactured.
Solution Approach 2:
The connector and strap design serves multiple functions: it provides mechanical attachment, establishes electrical connections for security monitoring, and enables adjustable length configuration. This multi-functionality allows a single strap design to accommodate various subject sizes and requirements.
3Reliability
If a clasp with multiple holes and conducting members is used, then electrical connection is achieved, but the device can be easily bypassed and removed without triggering an alarm
Solution Approach 1:
The conducting channels are pre-configured to connect specific projecting members to specific strap holes in a predetermined pattern that is stored in the electronic circuit. This preliminary arrangement ensures that any attempt to remove or tamper with the device will disrupt the pre-established conductive pathways, triggering an alarm before the device can be successfully removed.
Solution Approach 2:
The electronic circuit continuously monitors the conducting channels to detect whether they maintain their predetermined connections. If any channel connection is disrupted or altered from the stored pattern, the system provides immediate feedback by triggering an alarm signal, preventing undetected removal or tampering.
Data Source
Figure 1~2A
Figure 2B
Figure 3A
AI summary
The disclosure relates to a wearable device (200) for tracking a subject. It includes a flexible member attachable on a limb of the subject, an electronic circuit (210) and a connector (230). The flexible member has a first portion (220a) comprising a first set of conducting channels, and a second portion (220b) comprising a second set of conducting channels. The electronic circuit (210) is coupled to the first portion and the second portion. The connector (230) is adapted to connect the first portion to the second portion. Upon connection at least one channel from the first set is connected to a channel from the second set to obtain a channel connection.