EIR Terminal 3D Spatial Mapping for RFID Inventory
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Solution Overview
Problem
Current RFID-based inventory management systems face inefficiencies due to the lack of accurate localization of RFID tags, leading to incomplete scans and increased labor costs, as they struggle to correlate the RFID reader's position and orientation with the tags being read, resulting in lost sales from unexpected stockouts.
Innovation Solution
An EIR terminal equipped with a 3-axis accelerometer, 3-axis magnetometer, and 3-axis gyroscope sensors, which, along with a GUI, enables precise tracking and mapping of RFID tags in three-dimensional space by establishing a calibrated reference point and overlaying scan traces on physical structures, using a 'scan and tap' method to set initial coordinates and track movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RFID reading devices are used to read multiple RFID tags simultaneously, then reading efficiency is improved, but the ability to locate and correlate specific tags with their physical positions deteriorates
Solution Approach 1:
The patent introduces an intermediary calibration process using known reference points (calibration tags at predetermined locations) to create a mapping between RFID signal space and physical space. This intermediary calibration data allows the system to correlate multiple simultaneous tag reads with their actual physical positions, resolving the contradiction between reading efficiency and localization accuracy.
Solution Approach 2:
The system changes parameters by collecting and analyzing signal strength measurements from multiple calibration points to establish a spatial mapping model. By transforming the raw RFID reading data into calibrated spatial coordinates through parameter adjustment and calibration factor application, the system maintains high reading efficiency while achieving accurate tag localization.
2Area of stationary object
If the EIR terminal moves freely to scan inventory, then scanning coverage is improved, but the ability to accurately map scan traces to physical structures deteriorates
Solution Approach 1:
The patent replaces mechanical positioning systems with a sensor-based approach, integrating accelerometer, magnetometer, and gyroscope sensors to track the EIR terminal's movement. This substitution allows the system to maintain accurate spatial mapping while the terminal moves freely, as the sensors continuously record position and orientation data that is later correlated with RFID tag readings.
Solution Approach 2:
The calibration data from known reference points serves as an intermediary that bridges the gap between sensor-measured positions and actual physical locations. By using these calibration references, the system can accurately map scan traces to physical structures even when the EIR terminal moves freely, resolving the contradiction between scan coverage and mapping accuracy.
3Ease of operation
If manual inventory scanning is performed, then labor flexibility is maintained, but scanning completeness and accuracy deteriorate
Solution Approach 1:
The system implements feedback by providing real-time visual display of scan traces overlaid on images of physical structures. This feedback mechanism allows operators to see which areas have been scanned and which remain, ensuring scanning completeness while maintaining labor flexibility. The visual feedback motivates operators to achieve complete coverage without requiring rigid procedural constraints.
4Speed
If RFID tags are read without localization capability, then reading speed is improved, but inventory management accuracy deteriorates
Solution Approach 1:
The system performs preliminary calibration action by pre-establishing the locations of calibration tags and creating a spatial mapping model before actual inventory scanning. This preliminary action enables the system to rapidly read RFID tags at full speed while automatically correlating each reading with its precise physical location, thus maintaining both reading speed and inventory management accuracy.
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 enhances inventory tracking efficiency, reduces human error, and lowers labor costs by providing accurate localization of RFID tags across various inventory configurations and structures, ensuring complete scans and minimizing stockout issues.
Implementation Method 1
An EIR terminal equipped with a 3-axis accelerometer, 3-axis magnetometer, and 3-axis gyroscope sensors
Implementation Method 2
An EIR terminal equipped with a 3-axis accelerometer, 3-axis magnetometer, and 3-axis gyroscope sensors
Implementation Method 3
An EIR terminal equipped with a 3-axis accelerometer, 3-axis magnetometer, and 3-axis gyroscope sensors
Implementation Method 4
Radio-frequency identifier (RFID) methods are widely used in a number of applications
Data Source
AI summary
A method of mapping the location of at least one object in three dimensional space, relative to an initial point in three dimensional space by an EIR terminal which contains a microprocessor, memory, a scanning device, a motion sensing device, and a communication interface. The method includes scanning a signal of decodable indicia located at a pre-defined area of a physical object, locating the decodable indicia within this signal, decoding the decodable indicia into a decoded message. The decoded message is an identifier for said physical object, which is then displayed. After receiving an interface command, the EIR terminal is placed in mechanical contact with the pre-defined area of the physical object and a first spatial position is stored as a point of origin in the EIR terminal.