RFID Data Acquisition via Field Threshold and Time Division
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Solution Overview
Problem
Existing data acquisition systems face interference and incorrect data reception when a large number of electronic data carriers are within the electromagnetic alternating field of a detection unit, preventing effective data acquisition.
Innovation Solution
The system ensures interference-free data acquisition by configuring detection units to only output data when a field strength threshold is exceeded, allowing for spatial and temporal control of electromagnetic fields to activate data carriers selectively, and using identification codes or encryption to address specific data carriers, thereby preventing mutual interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large number of data carriers are located within the electromagnetic alternating field of the detection unit, then data acquisition coverage is improved, but data signals interfere with each other and cannot be received correctly
Solution Approach 1:
The patent divides the detection space into multiple detection units, each covering a specific volume unit. Data carriers are activated and detected in segmented regions rather than all at once, reducing signal interference while maintaining comprehensive coverage.
Solution Approach 2:
The patent employs time-division multiplexing where detection units are activated in periodic sequences. Each detection unit operates in alternating time segments, allowing data carriers to be activated and transmit data sequentially rather than simultaneously, thus preventing signal interference.
2Power
If the field strength is increased to activate all data carriers, then data output from data carriers is improved, but signal interference between multiple data carriers increases
Solution Approach 1:
The patent applies different field strengths to different spatial regions through multiple detection units. Each detection unit generates an electromagnetic alternating field with appropriate strength for its local region, activating only data carriers within that specific volume unit, thereby avoiding excessive field strength and signal interference.
Solution Approach 2:
Detection units are activated in periodic time segments, with each unit operating at full power during its designated time slot but remaining inactive during other slots. This periodic activation allows high field strength when needed while preventing continuous interference from multiple simultaneous transmissions.
3Area of stationary object
If multiple detection units are used to cover large areas, then detection coverage is improved, but coordination and synchronization become more complex
Solution Approach 1:
The patent implements a periodic time-division scheme where each detection unit is assigned specific time segments for activation. This regular periodic pattern simplifies coordination logic compared to arbitrary scheduling, as each unit follows a predictable activation cycle that is easy to synchronize across the network.
Solution Approach 2:
The system pre-assigns specific volume units and time segments to each detection unit before operation begins. This preliminary configuration establishes a fixed detection pattern that eliminates the need for complex real-time negotiation and coordination during actual data acquisition operations.
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 approach enables the detection of a high concentration of data carriers without interference, allowing for precise and sequential activation and data output, improving data acquisition efficiency and reducing errors.
Implementation Method 1
A detection device of this type is already known from the utility model publication DE 20 2005 014 644 U1. This describes how a large enough voltage is induced in the data carriers, when the field strength of the electromagnetic alternating field is sufficiently large, for all the data carriers to be activated and data to be output.
Implementation Method 2
the electromagnetic alternating fields of the at least two detection units being superimposed in such a manner that the field strength threshold value is exceeded for a time segment within a volume unit
Data Source
AI summary
In an arrangement and the associated method for the acquisition of data between at least one detection unit E1, E2, En and at least one means RFID1, RFID2, . . . RFIDn arranged in the electromagnetic alternating field EMF1, EMF2, . . . EMFn of the detection unit E1, E2, . . . En, for example an electronic data carrier, the means RFID1, RFID2, . . . RFIDn only submits data of a field intensity threshold value Emax of the electromagnetic alternating field EMF1, EMF2, . . . EMFn is exceeded. The data is received by the detection unit E1, E2, . . . E3. The field intensity of the electromagnetic alternating field EMF1, EMF2, . . . EMFn is designed such that within a predetermined unit of volume VE the field intensity threshold value Emax is exceeded for a predetermined amount of time t.