Escalator Balustrade Sensor Array for Target Detection
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Solution Overview
Problem
Conventional security check technologies using sensors on ceilings face challenges in detecting designated targets due to varying ceiling heights, leading to inconsistent detection accuracy.
Innovation Solution
A detection device with sensors mounted on balustrades of escalators, utilizing a transmitter and receiver with array antennas to transmit and receive signals, processing the information to determine the presence of designated targets, and displaying a warning image when detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensors are mounted on the ceiling to detect designated targets, then the detection coverage area is large, but the detection accuracy deteriorates due to varying distances caused by different ceiling heights
Solution Approach 1:
The patent transitions the sensor mounting location from the ceiling (vertical dimension) to the balustrade (horizontal dimension along the escalator). This dimensional change allows sensors to be positioned at a consistent horizontal distance from subjects regardless of ceiling height variations, thereby maintaining detection accuracy while preserving broad coverage through multiple sensor placements along the escalator length
Solution Approach 2:
The patent implements multiple sensors at different locations along the balustrade rather than a single ceiling sensor. Each sensor is positioned to optimize detection at specific segments of the escalator, creating localized high-accuracy detection zones that collectively provide comprehensive coverage with consistently high detection accuracy across the entire area
2Area of stationary object
If the distance between sensor and subject is increased to cover larger areas, then the detection coverage improves, but the detection accuracy deteriorates
Solution Approach 1:
The patent divides the detection area into multiple segments by placing several sensors at different positions along the balustrade. Each sensor covers a specific segment with short distance to subjects in that segment, ensuring high detection accuracy locally. The combined coverage of all segments achieves comprehensive area coverage while maintaining consistent high accuracy across the entire detection zone
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
Improves detection accuracy of designated targets by maintaining a consistent sensor-to-subject distance, enhancing the reliability of security checks in crowded areas.
Implementation Method 1
a transmitter to transmit a transmission signal to a space between the right and left balustrades of the at least one passenger conveyor using at least one transmission antenna, the at least one transmission antenna including a plurality of transmission antennas; a receiver to receive a reflection signal obtained by the transmission signal being reflected in the space using at least one reception antenna
Data Source
AI summary
A detection device includes processing circuitry configured to acquire sensor information from at least one sensor; the at least one sensor configured to be disposed on at least one of balustrades erected on both right and left sides with respect to a moving direction of steps of at least one passenger conveyor, each of the balustrades including a plurality of side plates; determine whether or not the detection target is a designated target to be warned on a basis of the acquired sensor information; and display a warning image indicating the designated target on a display device in a case where the processing circuitry determines that the detection target is the designated target.