Inductive Sensor Energy Pulse Transmission via Periodic Switching
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Solution Overview
Problem
Inductive energy and data transmission systems for sensors are limited by their fixed operating point, leading to inefficiencies and potential failures when trying to increase energy transmission, as higher primary voltages can result in excessive secondary voltages, causing loss of function or failure.
Innovation Solution
A method and sensor arrangement that allow for event-controlled transmission of higher energy pulses, briefly interrupting data transmission to store additional energy on the secondary side, which can be used for increased sensor functionality without exceeding voltage limits, using a primary coil and secondary coil for bidirectional energy and data transfer, and including a voltage limiter and energy store to manage these pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the primary voltage is increased to transmit more energy, then the energy transmission capability is improved, but the secondary voltage becomes excessively high causing loss of function or failure
Solution Approach 1:
The system alternates between normal operation mode and energy pulse transmission mode. During energy pulse transmission, the system briefly deviates from the target operating point to transmit higher energy, then returns to normal operation. This periodic switching allows energy-intensive operations without continuously exposing the sensor to dangerous voltage levels
Solution Approach 2:
The operating point of the inductive transmission system is made dynamic rather than fixed. The system can temporarily leave the target operating point during energy pulse transmission and then return to it. This dynamic adjustment allows the system to adapt energy transmission levels to actual needs while maintaining safety margins
2Reliability
If the system operates at a fixed target operating point for safe communication, then the communication reliability is improved, but the energy transmission capability is limited
Solution Approach 1:
The system uses periodic energy pulses superimposed on the continuous communication operation. Data transmission continues at the fixed operating point, while energy pulses are transmitted in controlled bursts when energy-intensive sensor operations are required, achieving both reliable communication and adequate energy supply
Solution Approach 2:
The system merges two operational modes: continuous low-level energy transmission for communication and periodic high-level energy pulses for sensor operations. The inductive interface simultaneously handles both data and energy transmission, combining functions that were traditionally separate
3Productivity
If energy pulses are transmitted to increase sensor functionality, then the sensor performance is improved, but data transmission is interrupted
Solution Approach 1:
Energy pulses are transmitted in brief, periodic bursts rather than continuously. The system switches to energy pulse mode only when needed for specific sensor operations, minimizing the duration of data transmission interruptions while ensuring adequate energy is delivered for the required functionality
Solution Approach 2:
The system rapidly transitions between communication mode and energy pulse mode, minimizing the time spent in each state. Energy pulses are delivered quickly in concentrated bursts, allowing the system to 'rush through' the energy transmission phase and return to communication mode with minimal interruption to data flow
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 increases energy availability for sensor functions by allowing brief deviations from the target operating point during energy pulse transmission, enabling more energy to be stored and used effectively without compromising communication or sensor operation.
Implementation Method 1
the primary side and the secondary side are coupled to each other via a primary coil and a secondary coil, by means of which two coils energy is transmitted from the primary side to the secondary side
Implementation Method 2
at least one voltage limiter for limiting the input voltage at the secondary coil
Data Source
AI summary
A method for transmitting energy to a sensor comprises transferring energy from a primary side having a primary coil to a secondary side having a secondary coil, wherein the sensor is arranged on the secondary side, wherein transfer of energy occurs via the two coils, wherein the two coils are designed to transmit data bidirectionally; acquiring a measured variable using the sensor; transmitting the measured variable from the secondary side to the primary side; requesting an energy pulse from the primary side when an event occurs that requires more energy; interrupting transmission of the measured variable; transmitting an energy pulse from the primary side to the secondary side; and returning to the normal mode upon acquisition of the measured variable; and transmitting to the primary side the measured variable. Also disclosed is a corresponding sensor arrangement for carrying out the method.