Radio Module Schedule for Field Device Power Management
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Solution Overview
Problem
Field devices equipped with radio modules face challenges in extending their operational life due to inefficient energy usage, as existing energy sources with limited capacitance, such as batteries, lead to excessive power consumption.
Innovation Solution
A radio module that schedules data transmission and control signal delivery to manage power consumption based on the device's functional requirements, allowing for reduced energy usage during non-essential operations by switching between different operating modes and optimizing energy supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the field device operates continuously to ensure data transmission and processing functions, then the functional reliability is improved, but the power consumption increases, reducing the operating life of the energy source
Solution Approach 1:
The field device dynamically switches between different operating modes (first operating mode with higher power consumption and second operating mode with lower power consumption) based on functional requirements. The control unit activates specific functional scopes only when needed, allowing the device to adapt its power consumption to actual operational demands rather than running continuously at full capacity
Solution Approach 2:
The radio module downloads process data from the field device based on a predetermined schedule at specific points in time. This periodic data transmission approach allows the field device to operate in a lower power state between scheduled transmissions, while still maintaining data freshness and functional reliability when needed
2Adaptability or versatility
If the field device is equipped with an energy source of limited capacitance to enable wireless operation, then the mobility and wireless capability are improved, but the operating life is limited by the energy source capacity
Solution Approach 1:
The field device dynamically adjusts its operational characteristics based on the remaining energy in the limited-capacitance source. The control unit monitors energy availability and switches between operating modes to extend the duration of operation, allowing the device to maintain wireless capability while optimizing the use of limited energy reserves
Solution Approach 2:
The field device performs only the essential functions required at any given moment rather than running all functions continuously. The control unit selectively activates functional scopes based on actual needs and energy availability, performing partial operations when energy is limited rather than attempting full operational capacity
3Reliability
If the radio module transmits data frequently to ensure data freshness and monitoring accuracy, then the data reliability is improved, but the power consumption of both the field device and radio module increases
Solution Approach 1:
The radio module downloads process data from the field device based on a predetermined schedule at specific points in time rather than continuously. This periodic transmission approach maintains data reliability by ensuring regular updates while significantly reducing the energy consumption associated with continuous data transmission and processing
Data Source
AI summary
A radio module for a field device, wherein the radio module contains a schedule, according to which process data, especially measurement data, are downloaded from the field device by means of the radio module and wirelessly transmitted to a superordinated unit. Based on the schedule, the radio module transmits to the field device control signals, which serve to control the power consumption of the field device.