Wireless Tag Power Stability via Multi-Device Channel Segmentation
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Solution Overview
Problem
Existing wireless tag systems face challenges in maintaining stable communication due to null ranges caused by radio wave reflection, leading to inadequate power supply for wireless tags, which increases manufacturing costs and restricts antenna placement.
Innovation Solution
Implementing a wireless tag system with two or more wireless communication devices that simultaneously transmit transmission waves on different channels, using unmodulated waves for higher power density, and incorporating a control device to manage transmission instructions and schedules, thereby ensuring reliable power supply and stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two antennas with phase-changing transmission circuits are used to eliminate null ranges, then communication stability is improved, but manufacturing cost increases
Solution Approach 1:
The system divides the communication area into multiple zones and assigns different antennas to different zones based on their radiation patterns. Instead of using complex phase-changing circuits, the patent segments the coverage area and uses multiple fixed-phase antennas positioned to collectively cover all zones, thereby eliminating null ranges without requiring expensive phase-changing transmission circuits.
2Reliability
If two antennas with phase-changing transmission circuits are used to eliminate null ranges, then communication stability is improved, but antenna placement restrictions increase
Solution Approach 1:
The patent assigns specific radiation patterns to specific antennas based on their placement locations. Each antenna is optimized for its local coverage area, and the system collectively provides comprehensive coverage through the combination of multiple antennas with different radiation characteristics. This allows flexible placement in various environments without requiring phase-changing circuits.
3Device complexity
If a single wireless communication device is used, then device complexity is reduced, but power supply reliability to wireless tags deteriorates
Solution Approach 1:
The patent combines multiple wireless communication devices to work together in a coordinated manner. By merging the transmission capabilities of multiple devices, the system ensures that wireless tags receive sufficient power even in areas where a single device would create null ranges. The devices are controlled to transmit on different channels or time slots, providing redundant power supply coverage.
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 configuration ensures reliable electrical power supply to wireless tags, enhances communication stability, reduces manufacturing costs, and allows for flexible antenna placement without the need for higher-level control devices.
Implementation Method 1
two or more wireless communication devices simultaneously transmit transmission waves for a predetermined period of time or more on different channels which are separated from each other by a predetermined channel number or more
Implementation Method 2
the electrical power required for the operation of the wireless tag can be easily obtained
Data Source
AI summary
A configuration that achieves stable wireless communication. In this configuration, electrical power according to transmission waves is reliably supplied to a wireless tag serving as a target of wireless communication. A first wireless communication device and a second wireless communication device are provided. Both the wireless communication devices substantially simultaneously transmit transmission waves on different channels separated from each other by a predetermined frequency or more on a frequency band in the frequency axis, when performing wireless communication processing to wirelessly communicate with a wireless tag in a predetermined communication area.