Imaging Device Array Antenna Positioning Accuracy
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Solution Overview
Problem
Existing imaging devices face challenges in accurately detecting the position of wireless terminals when the distance between the imaging device and the wireless terminal is short, leading to incorrect display of identification information due to differences in the viewing angles of the image capturing element and the array antenna.
Innovation Solution
The imaging device employs an array antenna with an antenna control unit to adjust the directivity, a signal intensity detection unit to assess reception intensity, and an estimated position calculation unit to accurately determine the display position of wireless terminals by combining angle of view, relative angle, and reception intensity, ensuring precise superimposition of identification information on the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the array antenna is used to detect the position of wireless terminals, then the detection range is extended, but the positional accuracy deteriorates when the terminal is close to the imaging device
Solution Approach 1:
The patent combines the array antenna and image capturing element into a single imaging device, merging wireless signal detection and visual imaging functions. The position detection unit uses both the array antenna's signal strength data and the image capturing element's visual data to calculate the wireless terminal's position, compensating for the array antenna's poor near-field accuracy while maintaining extended detection range.
Solution Approach 2:
The patent introduces the image capturing element as an intermediary to resolve the positional accuracy issue. When the wireless terminal is close to the imaging device, the image capturing element provides accurate visual positioning data that mediates and corrects the array antenna's inaccurate near-field measurements, while the array antenna continues to provide extended range detection for distant terminals.
2Reliability
If the identification information is displayed based on the array antenna's signal direction, then the wireless terminal can be detected, but the display position deviates from the actual position in the captured image when the terminal is close
Solution Approach 1:
The patent implements a feedback mechanism where the position detection unit continuously compares the position calculated from array antenna signals with the position derived from the captured image. When a discrepancy is detected (especially for close terminals), the system uses the image-based position as feedback to correct the display position, ensuring the identification information is always displayed at the accurate location in the captured image.
Solution Approach 2:
The patent makes the display position calculation dynamic by selecting different calculation methods based on the terminal's distance. For distant terminals, the array antenna's signal direction is used. For close terminals, the system dynamically switches to using the image capturing element's visual data for position calculation, ensuring accurate display positioning across all ranges.
3Adaptability or versatility
If the array antenna is positioned separately from the image capturing element, then wireless communication is enabled, but the viewing angle difference causes position detection errors for close terminals
Solution Approach 1:
The patent applies local quality by assigning different functional roles to different components based on their spatial characteristics. The array antenna, positioned separately for wireless communication, is used for distant terminal detection where its viewing angle difference is negligible. The image capturing element, positioned for visual imaging, is used for close terminal detection where accurate spatial positioning is critical. Each component operates in its optimal performance zone.
Solution Approach 2:
The patent changes the parameter used for position detection based on the terminal's distance parameter. For distant terminals, the system uses signal strength and direction from the array antenna. For close terminals, the system switches to using visual data from the image capturing element. This parameter change strategy allows the system to maintain both wireless communication capability and position detection accuracy across different ranges.
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
This solution enables accurate display of wireless terminal information even when close to the imaging device, improving positional accuracy and user comprehension by correctly positioning additional information like icons relative to the captured image.
Implementation Method 1
an array antenna 17-4... receives radio waves transmitted by a transmission device which a subject has through the array antenna
Data Source
AI summary
An imaging device includes: an imaging unit that captures images; a display unit that displays the images; an antenna arranged at a predetermined position relative to the imaging unit; an antenna control unit that changes the direction of maximum gain for the antenna and controls the directionality of the antenna; a wireless unit that, via the antenna, transmits search data to at least one wireless terminal and receives response data in relation to the search data; a signal strength detection unit that detects the reception strength of the response data; an identification information extraction unit that identifies identification information for the wireless terminal that is the transmission source for the response data; a record control unit that generates data sets associating the identification information, the reception strength, and the direction of maximum gain.