Body-Worn Sensor System for Automatic Fight Detection
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Solution Overview
Problem
Law enforcement communication systems fail to automatically detect and record fights or assaults in real-time, leading to potential lack of evidence and delayed backup assistance due to battery consumption from continuous camera operation.
Innovation Solution
A communication system with body-worn sensors and a camera that automatically detects fight parameters like limb movements and vital signs, triggering video recording and alerting dispatch, using a portable device with a controller and transceiver to notify peers and record evidence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera operates continuously to record evidence, then the reliability of evidence collection is improved, but the battery life deteriorates
Solution Approach 1:
The camera operates periodically rather than continuously - it activates only when fight parameters are detected by sensors and remains off during normal conditions, thus collecting evidence only when needed while conserving battery power during non-critical periods
Solution Approach 2:
The system uses sensors to automatically detect fight conditions and trigger camera recording without requiring manual activation by the officer, enabling the system to serve itself by intelligently determining when evidence collection is necessary
2Reliability
If the officer manually activates the camera to record evidence, then the evidence collection is improved, but the response time in emergency situations deteriorates
Solution Approach 1:
Sensors continuously monitor fight parameters in advance, so when a fight occurs, the system has already detected the conditions and can immediately activate the camera without requiring the officer to manually initiate recording, thus eliminating the manual activation delay
Solution Approach 2:
The system automatically detects fight conditions and triggers camera activation without requiring manual intervention from the officer, enabling the equipment to serve itself by intelligently determining when evidence collection should begin
3Measurement precision
If sensors continuously monitor fight parameters, then the detection accuracy is improved, but the battery consumption increases
Solution Approach 1:
The system monitors fight parameters continuously but only activates full recording functions when fight conditions are detected, using periodic sensor checks to balance detection accuracy with battery conservation by maintaining surveillance without continuous high-power operation
Data Source
AI summary
A communication system and method provide fight detection capability. Bodily parameters associated with fighting, such as limb movements, are pre-stored and individualized for a particular user. The characterization of a fight using limb movements allows for a system that can recognize a fight even when a user is unable to call for assistance. Other bodily parameters are further monitored and weighted to distinguish a fight from other activities. The automatic notification to a dispatch center or control center and notification to peer radios expedites the ability to bring aid to the user.