Shoe Scanning Voltage Adjustment for Detection Accuracy
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Solution Overview
Problem
Conventional methods for scanning shoes with an external electric field face challenges in ensuring the electric field penetrates sufficiently into the heel area, leading to compromised accuracy in detecting concealed substances due to variations in shoe shapes and sizes, resulting in either lost irregularities in low voltage scans or inability to distinguish components in high voltage scans.
Innovation Solution
A method and apparatus that automatically adjusts the input strobing voltage from a first intensity to a second intensity based on output sample analysis, optimizing the electric field penetration by repeatedly scanning and adjusting the voltage while the shoe is in contact, using a support platform, dielectric membrane, strobing circuit, sampling circuit, processor, and voltage-adjustment circuit to produce and compare output signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed input voltage is applied to the transmission line, then the scanning process is simple and fast, but the electric field penetration is insufficient for various shoe shapes and sizes, leading to compromised detection accuracy
Solution Approach 1:
The patent implements dynamic voltage adjustment by transitioning from a fixed input voltage to a variable voltage system that adapts to different shoe geometries. The voltage-adjustment circuit modifies the input voltage applied to the transmission line based on feedback from output signal analysis, enabling the electric field to penetrate various shoe shapes and sizes effectively while maintaining detection accuracy.
Solution Approach 2:
The patent employs feedback control where output signals from the dielectric membrane are analyzed and compared against reference values. Based on this comparison, the voltage-adjustment circuit automatically adjusts the input voltage to optimize electric field penetration. This closed-loop feedback mechanism ensures reliable detection across different shoe configurations without requiring manual intervention.
2Length of stationary object
If the input voltage is increased to improve penetration, then the electric field reaches deeper into the shoe, but irregularities are lost due to signal saturation
Solution Approach 1:
The system dynamically adjusts the input voltage to an optimal level rather than using a fixed high voltage. The voltage-adjustment circuit modulates the voltage applied to the transmission line based on real-time analysis of output signals, ensuring sufficient penetration depth while preventing signal saturation that would cause loss of irregularity information.
Solution Approach 2:
The patent changes the voltage parameter dynamically during the scanning process. By adjusting the input voltage level based on feedback from output signal analysis, the system optimizes the balance between penetration depth and measurement precision, preventing both insufficient penetration and signal saturation.
3Measurement precision
If the input voltage is decreased to preserve signal detail, then irregularities are maintained, but the electric field fails to penetrate sufficiently into the heel area
Solution Approach 1:
The system uses dynamic voltage adjustment to overcome the limitation of fixed low voltage. The voltage-adjustment circuit increases the input voltage when penetration is insufficient (particularly in the heel area) while maintaining signal detail through feedback control, rather than being constrained by a fixed low voltage level.
Solution Approach 2:
The feedback mechanism analyzes output signals to determine whether the electric field is penetrating sufficiently. When penetration is inadequate, the system automatically adjusts the input voltage upward while monitoring to preserve signal detail, resolving the contradiction between penetration depth and signal detail preservation.
4Reliability
If multiple voltage levels are tested manually to optimize scanning, then detection accuracy improves, but the scanning time increases significantly
Solution Approach 1:
The patent implements automatic feedback control that eliminates manual voltage testing. The system continuously monitors output signals and automatically adjusts the input voltage to optimal levels in real-time during scanning, achieving high detection accuracy without the time loss associated with manual testing of multiple voltage levels.
Solution Approach 2:
The voltage-adjustment circuit performs self-adjustment based on feedback from the scanning system, eliminating the need for manual intervention. The system automatically optimizes the input voltage during scanning, maintaining high detection accuracy while significantly reducing the time required compared to manual voltage testing procedures.
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
Significantly enhances the ability to identify concealed substances by optimizing the strobing voltage, ensuring accurate detection of suspect materials within the shoe, thereby improving the device's accuracy and reliability in security scanning.
Implementation Method 1
scanning an object with an external electric field, in which at least one transmission line is energised by the application of an input voltage
Implementation Method 2
An output signal is then produced in a second electrode by capacitive coupling, from which the electrical permittivity of the volume may be deduced
Implementation Method 3
strobing at least one input-line by the application of an input voltage having a first-intensity
Implementation Method 4
sampling a plurality of output lines to produce a plurality of output samples; comparing selected output samples against a reference
Data Source
AI summary
The scanning of shoes using an external electric field is shown. A shoe, while being worn, is positioned upon a support platform. At least one input line is strobed by the application of an input voltage having a first intensity and output lines are sampled to produce output samples. Selected output samples are compared against a reference and the input voltage is adjusted, in a response to this comparing step, from the first intensity to a second-intensity.