Field Device Detection Circuit for Energy Saving
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Solution Overview
Problem
Field devices with limited energy reserves face inefficiencies in maintaining constant readiness for communication, leading to unnecessary energy consumption and reduced battery life, especially when sporadic communication requests occur.
Innovation Solution
A detection circuit that automatically activates communication-relevant components only during active operating phases and switches them back to sleep mode when idle, utilizing a high-impedance coupled comparator circuit to monitor communication channels for current and voltage modulations, and a low-power comparator with a filter to minimize energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication-relevant components are kept on standby to ensure constant readiness for communication, then communication reliability is improved, but energy consumption increases and battery life decreases
Solution Approach 1:
The patent implements dynamic power management by switching communication components between active and sleep modes based on communication state. The detection circuit dynamically activates the functional unit when communication signals are detected and deactivates it during idle phases, making the system adaptable to varying communication demands rather than maintaining constant readiness.
Solution Approach 2:
The patent employs periodic sampling of the communication channel through the detection circuit to detect communication signals. Instead of continuous monitoring, the system periodically checks for signals and activates components only when needed, creating a rhythmic pattern of active and idle states that reduces overall energy consumption while maintaining communication readiness.
2Use of energy by moving object
If communication components are switched off during idle phases to save energy, then energy consumption is reduced, but detection of incoming communication signals is delayed
Solution Approach 1:
The detection circuit performs preliminary monitoring of the communication channel even when the functional unit is in sleep mode. By continuously sampling the channel for signal presence and being ready to immediately activate the functional unit upon detecting a signal, the system prepares in advance for potential communication events, minimizing activation delay while maintaining energy savings.
Solution Approach 2:
The detection circuit serves as an intermediary between the sleep mode functional unit and the active communication state. It continuously monitors the communication channel and acts as a trigger mechanism that activates the functional unit only when communication signals are detected, bridging the gap between energy-saving idle state and immediate communication readiness.
3Use of energy by moving object
If a detection circuit is added to automatically activate components, then energy management is improved, but device complexity increases
Solution Approach 1:
The detection circuit is designed to perform multiple functions: it monitors the communication channel for signal detection, determines when to activate the functional unit, and manages the transition between sleep and active modes. By consolidating these detection and control functions into a single integrated circuit rather than separate components, the patent reduces overall device complexity while achieving effective energy management.
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a field device (1) for automation technology, which is powered via a two-wire line (14) or an energy source (3) with a limited energy reserve associated with the field device (1), with a wired communication interface (7a) having at least one communication channel and with a functional unit (12) associated with the communication interface (7b), which is configured to perform the sending and/or receiving of digital communication signals via the communication interface (7a, 7b), wherein the functional unit (12) is only switched on during active operating phases for the purpose of saving energy, while it is switched off during the inactive standby phases, and wherein a detection circuit (5) is provided which detects a communication signal present at the communication interface (7a, 7b) and automatically activates the functional unit (12).