Capacitive Near-Field Communication System for Electrical Installations
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Solution Overview
Problem
Existing communication systems for electrical devices in installation technology are complex, costly to install, and prone to interference, requiring control lines or power lines for signal transmission.
Innovation Solution
A communication system utilizing high-frequency alternating currents capacitively coupled to existing electrically conductive elements, enabling near-field communication without radio connections, which uses metal structures for signal propagation and eliminates the need for dedicated transmission lines by leveraging existing infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional communication systems (European Installation Bus, Local Operating Network, Powerline) are used, then reliable data transmission is achieved, but device complexity and installation cost increase
Solution Approach 1:
The patent applies universality by using existing electrically conductive elements (power lines, metal structures) for both power transmission and data communication. The same infrastructure serves dual purposes, eliminating the need for separate dedicated communication wiring and reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The patent introduces an intermediary approach by using the existing electrical infrastructure as a mediator between devices. Instead of direct point-to-point communication cables, the system uses the shared electrical conductive elements as the communication medium, leveraging already-installed structures to enable data transmission without additional wiring complexity.
2Reliability
If dedicated control lines or power lines are installed for signal transmission, then stable communication is achieved, but installation cost and effort increase
Solution Approach 1:
The patent applies self-service by having the existing electrical infrastructure serve the communication function without requiring separate dedicated wiring. The power lines and metal structures already present in the installation automatically become the communication medium, eliminating the need for additional installation work while maintaining communication stability.
Solution Approach 2:
The patent makes the existing electrical conductive elements universal by enabling them to perform both power distribution and data communication functions simultaneously. This multi-functionality eliminates the need for separate dedicated communication lines, reducing installation cost and effort while maintaining stable communication through the use of already-installed infrastructure.
3Ease of manufacture
If radio communication is used for data transmission, then installation simplicity is achieved, but interference and signal loss increase
Solution Approach 1:
The patent substitutes the radio electromagnetic field mechanism with a near-field capacitive coupling mechanism. Instead of using radio waves that propagate through space and are susceptible to interference, the system uses capacitive coupling through existing conductive elements, replacing the radio communication approach with a different physical mechanism that avoids interference while maintaining installation simplicity.
Solution Approach 2:
The patent uses existing electrically conductive elements as intermediaries to transfer communication signals. Rather than direct radio transmission that is prone to interference, the system uses these intermediaries (power lines, metal structures) as guided pathways for capacitive coupling, eliminating interference while keeping installation simple by leveraging already-installed infrastructure.
4Use of energy by moving object
If high-frequency alternating current is used for near-field communication, then power consumption is reduced, but requirement for precise frequency matching increases
Solution Approach 1:
The patent applies parameter changes by operating in the low-frequency range (5-50 kHz) rather than high-frequency radio bands. This frequency parameter change enables near-field capacitive coupling that is more tolerant of frequency variations and environmental conditions, reducing the need for precise frequency matching while also lowering power consumption compared to traditional radio communication methods.
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 results in a low-power, low-interference communication system with reduced installation effort, capable of directional or bidirectional data transmission, suitable for retrofitting and utilizing existing metal structures, and operates within the ISM frequency band without additional licensing.
Implementation Method 1
The field transmitted in the conductor element is coupled out by means of a receiver, which has at least one coupling element. In such a near-field communication, the data transmission system has a transmitter whose coupling element essentially emits an electrical near-field. This field is capacitively coupled into an electrically conductive element, in which a current, in particular a pulsed displacement current due to a change in charge, then occurs on the electrically conductive element.
Implementation Method 2
The field transmitted in the conductor element is coupled out by means of a receiver, which has at least one coupling element. This field is capacitively coupled into an electrically conductive element... a signal can thus be received. The signal, which can be implemented as a control, notification or command signal, for example, generally comprises a data telegram
Data Source
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AI summary
To provide a communication system (1) for data interchange between electrical appliances (2.1 to 2.n) in electrical installation engineering which is distinguished by a simple topology and low installation complexity, provision is made for quasi-stationary electrical fields (N and S) with a high-frequency AC current to be used to achieve signal coupling to electrically conductive elements (5.1 to 5.n) which are present in the installation arrangement for the purpose of capacitive near-field communication.