Handheld Deactivator Thermal Sensor Human Proximity Detection
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Solution Overview
Problem
Handheld deactivation devices for Electronic Article Surveillance (EAS) systems pose health risks due to exposure to electric and magnetic fields, restricting their use in public areas as they are not designed to minimize human exposure to these fields effectively.
Innovation Solution
A Handheld Scanning and Deactivation (HSD) device that determines the proximity of humans to prevent or initiate operations based on safe distance from the device, using thermal sensors to distinguish between the operator and others, ensuring operations are only performed when the magnetic field strength is safe for human exposure, thus minimizing exposure risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If handheld deactivation device operations are restricted to prevent human exposure to electric and magnetic fields, then health safety is improved, but device functionality and operational capability deteriorate
Solution Approach 1:
The thermal sensor performs preliminary detection of human presence before the deactivation device operates. The system proactively identifies potential exposure risks by detecting human proximity in advance, allowing preventive action to be taken before harmful electromagnetic field exposure occurs, thus resolving the contradiction between safety and operational capability
Solution Approach 2:
The system implements feedback control by continuously monitoring thermal sensor data and dynamically adjusting device operation based on detected human proximity. When humans are detected within the safety radius, the system provides feedback to prevent operation; when no humans are present, operation is permitted, thus maintaining both safety and productivity
2Object-affected harmful factors
If thermal sensor detection is implemented to identify human proximity, then health safety control is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or electronic field measurement systems with thermal sensor-based detection. Instead of using sophisticated electromagnetic field sensors or mechanical proximity detectors, the system uses readily available thermal sensors to detect human presence through body heat, significantly reducing device complexity while maintaining effective safety control
Solution Approach 2:
The thermal sensor acts as an intermediary between the human presence and the deactivation device operation. Rather than directly measuring electromagnetic field exposure or implementing complex control systems, the thermal sensor provides an indirect but reliable indication of human proximity, simplifying the overall system architecture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The HSD device complies with health agency regulations by preventing operations when humans are within unsafe proximity, ensuring safe magnetic field exposure and expanding the geographic locations where the device can be used, while maintaining effective deactivation of EAS security tags.
Implementation Method 1
determining whether a human is located within a defined distance range of the HSD device
Data Source
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AI summary
Systems (100) and methods (600) for controlling operations of a Handheld Scanning and Deactivation ("HSD") device. The methods comprise: determining whether a human is located within a defined distance range of the HSD device; preventing first operations from being performed by the HSD device which cause a magnetic field to be generated, if it is determined that said human is located within the defined distance range of said HSD device; and initiating the first operations if it is determined that the human is not located within the defined distance range of the HSD device. The first operations comprise (1) interrogation operations for detecting a presence of an electronic article surveillance security tag and/or (2) deactivation operations for deactivating an electronic article surveillance security tag.