Two-Wire Data and Energy Transmission System with Mode Switching
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Solution Overview
Problem
Existing two-wire line transmission systems for data and energy between a master-module and slave-modules are limited by requiring complex components, supporting only point-to-point connections, and being costly due to the need for integrated circuits and large hardware components.
Innovation Solution
A transmission system that can switch between multiple operating states for energy and data transmission, allowing for bidirectional data communication and energy supply, using load modulation and energy storage in slave-modules to enable efficient operation with reduced component complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data signal is modulated onto carrier frequency and superimposed on DC voltage for transmission via two-wire line, then bidirectional data transmission is achieved, but only point-to-point connections are possible and complex components (inductivities, ICs) are required
Solution Approach 1:
The patent extracts the data transmission function from the power transmission function by using separate time slots. Data transmission occurs during specific intervals when power transmission is suspended, allowing simple voltage level detection without requiring complex modulation/demodulation hardware. This separation eliminates the need for inductivities and ICs while maintaining bidirectional communication capability.
Solution Approach 2:
The system employs periodic switching between power transmission mode and data transmission mode. During data transmission intervals, the DC voltage is temporarily interrupted and replaced with data signals represented by different voltage levels. This periodic alternation enables simple voltage detection for data recovery without requiring complex continuous modulation hardware.
2Ease of operation
If power line communication with carrier frequency modulation is used, then data transmission over two-wire line is achieved, but complex hardware (ICs, analog filters with capacitors and inductivities) is required on both transmitter and receiver sides
Solution Approach 1:
The patent replaces expensive, complex analog filter hardware with simple voltage detection circuitry. Instead of using ICs and analog filters with capacitors and inductivities, the system uses basic voltage level detection that can be implemented with simple comparators or even software-based detection, dramatically reducing hardware complexity and cost.
Solution Approach 2:
The patent substitutes the mechanical/electrical analog filtering system with a digital/voltage-level-based detection system. By representing data as distinct voltage levels during temporary DC voltage interruptions, the system eliminates the need for analog filters and replaces them with simpler voltage threshold detection, reducing hardware complexity.
3Ease of operation
If DC voltage is temporarily interrupted for data transmission from master-module to slave-module, then data transmission is enabled, but energy supply to slave-module is interrupted
Solution Approach 1:
The slave-module is equipped with an energy storage device (capacitor) that is pre-charged during power transmission intervals. This preliminary energy storage enables the slave-module to maintain operation during the brief DC voltage interruptions when data transmission occurs, eliminating the energy supply interruption problem.
Solution Approach 2:
The energy storage device in the slave-module acts as a cushion that compensates for the temporary energy supply interruption during data transmission. The stored energy provides a buffer that maintains the slave-module's operation throughout the brief periods when DC voltage is interrupted for data signal transmission.
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
Enables efficient, cost-effective, and flexible data and energy transmission between multiple slave-modules and a master-module, reducing hardware complexity and supporting bus system configurations, while maintaining energy supply during data transmission.
Implementation Method 1
the slave-module comprises an energy store (24) which is configured to supply the slave-module with energy required for operation during the interruption of the energy transmission from the master-module in the second operating state
Implementation Method 2
The data signal to be transmitted can be modulated onto a carrier frequency and transmitted between the master-module 1 and the slave-module 2 via the two-wire line 3
Data Source
AI summary
In examples, a transmission system for transmitting data and energy, with a master-module, at least one slave-module, and a two-wire line between the master-module and the slave-module for bidirectional data transmission between the master-module and the slave-module and for energy transmission from the master-module to the slave-module. Examples provide for the transmission system to be switchable be-tween several operating states, the operating states preferably differing with regard to energy transmission and/or with regard to data transmission. Furthermore, examples include an adapted master-module, a slave-module and an associated operating method.