Multi-Sensor Distance Height Measurement for Drug Detection
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Solution Overview
Problem
Conventional drug testing methods, such as urine, blood, or saliva tests, are time-consuming, resource-intensive, prone to false results, and ineffective against drug metabolism neutralization methods, necessitating a more efficient and accurate method for drug detection.
Innovation Solution
A method using a plurality of sensors on a security inspection device to measure distances and heights, determining a final distance and height for accurate pupil image analysis to detect drug use, involving pixel and size conversions based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drug testing methods (urine, blood, or saliva tests) are used, then drug detection can be performed, but the process is time-consuming, resource-intensive, and prone to false results
Solution Approach 1:
The patent replaces conventional biological testing methods (urine, blood, or saliva tests) with an optical measurement system that uses sensors to detect pupil size changes. This substitution eliminates the need for complex laboratory procedures while providing rapid, reliable drug detection results.
Solution Approach 2:
The patent detects drug use by monitoring changes in pupil size parameters. When a subject uses drugs, physiological changes occur that affect pupil diameter. By measuring these parameter changes rather than performing comprehensive biological tests, the system achieves fast and accurate detection without time-consuming laboratory analysis.
2Measurement precision
If multiple sensors are used to measure distance and height, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sensors (first sensor, second sensor, and third sensor) into a single integrated measurement system. These sensors work together to simultaneously measure distance and height parameters, achieving high measurement precision while managing system complexity through unified data processing.
Solution Approach 2:
The sensor system is designed to perform multiple measurement functions using a single integrated approach. The same sensor array measures both distance and height parameters, eliminating the need for separate measurement devices and reducing overall system complexity while maintaining high precision.
3Measurement precision
If pixel conversion and size conversion are performed based on measured distance and height, then pupil size measurement accuracy is improved, but processing time increases
Solution Approach 1:
The system performs pixel conversion and size conversion calculations in advance based on pre-measured distance and height parameters. By preparing the conversion factors and processing algorithms before actual pupil size measurement is needed, the system reduces real-time processing time while maintaining high measurement precision.
Data Source
AI summary
The present disclosure provides a method of determining a distance and a height, including: measuring, a first distance, a second distance and a third distance from the security inspection device to the tested person as well as measuring a first height, a second height and a third height of the tested person; determining, a relationship between the first distance and a minimum distance threshold as well as a maximum distance threshold, a relationship between the second distance and the minimum distance threshold as well as the maximum distance threshold, and a relationship between the third distance and the minimum distance threshold as well as the maximum distance threshold; determining, a final distance from the security inspection device to the tested person and a final height of the tested person; and performing a pixel conversion and a size conversion on the pupil image of the tested person.