Movable RFID Antenna Positioning for Selective Tag Reading
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Solution Overview
Problem
Existing wireless tag communication systems struggle to accurately detect and read information from target wireless tags while minimizing interference from non-target tags.
Innovation Solution
A wireless tag communication apparatus with a movable antenna system that moves within a predetermined placement range, using sensors and machine learning to determine the position of tags and selectively read information from target tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wireless tag communication apparatus uses a fixed antenna to detect wireless tags, then the device complexity is low, but the detection precision and ability to distinguish target tags from non-target tags deteriorates
Solution Approach 1:
The patent implements a movable antenna system that can dynamically change its position within a predetermined range below the table surface. This dynamic positioning capability allows the antenna to optimize its detection accuracy for target wireless tags while minimizing interference from non-target tags, resolving the contradiction between detection precision and device complexity by replacing a static simple structure with a dynamically adjustable one.
Solution Approach 2:
The patent introduces spatial positioning as an additional dimension to the antenna system. By moving the antenna in three-dimensional space below the table surface and correlating antenna position with tag position, the system enhances its ability to distinguish target tags from non-target tags. This dimensional addition transforms a simple detection system into a spatially-resolved detection system, improving measurement precision without excessive complexity increase.
2Measurement precision
If the antenna moves within a predetermined range to improve tag detection accuracy, then the detection precision improves, but the device complexity increases due to additional drive mechanisms
Solution Approach 1:
The patent employs a drive mechanism that enables the antenna to move dynamically within a predetermined range below the table surface. This dynamic capability allows the system to adjust antenna position according to the placement range of articles, improving detection accuracy while keeping the movement constraints bounded and controlled, thus managing device complexity through defined motion parameters.
Solution Approach 2:
The patent implements a control system that coordinates antenna movement with article placement detection. The drive mechanism positions the antenna based on detected article locations, creating a feedback loop where the system adjusts antenna position according to actual tag placement, thereby improving detection accuracy while managing complexity through intelligent control rather than mechanical complexity.
3Productivity
If the wireless tag communication apparatus reads information from all detected tags, then the productivity is high, but the loss of information increases due to reading non-target tags
Solution Approach 1:
The patent applies local quality by making the reading operation selective rather than universal. The system determines whether each detected wireless tag is a target tag based on its position relative to placed articles and the antenna position. Only tags identified as target tags within the specific placement range are read, while non-target tags are excluded. This localized approach to information retrieval improves productivity by avoiding unnecessary reads of non-target tags while maintaining information accuracy.
4Measurement precision
If the antenna emits electromagnetic waves in a fixed pattern, then the energy consumption is low, but the detection precision for target tags among multiple tags deteriorates
Solution Approach 1:
The patent implements dynamic electromagnetic wave emission patterns that adapt to the antenna's position and the detected tag locations. Rather than using a fixed emission pattern, the system adjusts its emission characteristics based on real-time spatial information, improving target tag detection accuracy among multiple tags while managing energy consumption through adaptive rather than static operation.
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
Enhances the accuracy of detecting and reading information from target wireless tags by minimizing interference from non-target tags, ensuring high detection precision and selective information retrieval.
Implementation Method 1
The wireless tag communication apparatus emits an electromagnetic wave from an antenna
Implementation Method 2
receives the electromagnetic wave transmitted from the wireless tag in response to the electromagnetic wave by the antenna
Data Source
AI summary
Provided is a wireless tag communication apparatus that detects a target wireless tag with high accuracy and reads information. A wireless tag communication apparatus according to an embodiment includes at least one antenna, a reading apparatus, and a drive apparatus. The antenna is disposed below a table where an article attached with a wireless tag is placed. The reading apparatus communicates with the wireless tag via the antenna, detects the wireless tag within a placement range on the table where the article is placed, and reads information from the wireless tag within the placement range. The drive apparatus moves the antenna inside the placement range.