Field Device Proximity Control for Energy Savings
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Solution Overview
Problem
Field devices in process automation, especially in explosion-proof areas, face challenges with increased energy consumption due to constant operation and manual activation requirements, complicating user interaction and energy management.
Innovation Solution
Incorporating a control unit and monitoring device, such as proximity or near-field sensors, to actuate electrical loads only when a user is present, enabling contact-free operation and energy-efficient activation/deactivation of components like sensors and displays, reducing unnecessary power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If field devices are permanently operated and supplied with electrical energy to enable reading at any time, then user accessibility is improved, but energy consumption increases
Solution Approach 1:
The field device switches between active and sleep modes periodically. The control unit activates electrical loads only when a user is detected in the vicinity and deactivates them when no user is present, creating a periodic on-demand operation pattern that reduces energy consumption while maintaining accessibility when needed.
2Use of energy by moving object
If field devices are operated manually to reduce energy consumption, then energy efficiency is improved, but operation complexity increases
Solution Approach 1:
The field device automatically detects user presence using the monitoring device and autonomously activates or deactivates electrical loads without requiring manual user input. The control unit processes monitoring signals and independently controls the electrical loads, making the device self-managing and eliminating the need for manual operation while maintaining energy efficiency.
3Reliability
If contact-free actuation is implemented for safety in explosion-proof areas, then safety is improved, but device complexity increases
Solution Approach 1:
The monitoring device acts as an intermediary between the user and the electrical loads. It detects user presence and transmits monitoring signals to the control unit, which then actuates the electrical loads without direct contact from the user. This intermediary system enables contact-free operation for safety while managing complexity through integrated control logic.
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 solution ensures significant energy savings and improved user interaction by activating components only when needed, enhancing safety and flexibility, particularly in hazardous environments.
Implementation Method 1
The field device (1) has a monitoring device (6) which is designed to detect the presence of a user (2) in an environment (4) of the field device (1)
Data Source
Figure 1~2
Figure 3~4
AI summary
A field device (1) for acquiring a process variable is proposed, wherein the field device (1) comprises a control unit (3) and at least one electrical load (8, 10, 16, 17). The control unit (3) is configured to receive a monitoring signal from a monitoring device (6) for detecting the presence of a user (2) of the field device (1) in an environment (4) of the field device (1), wherein the monitoring signal is indicative and/or representative of the presence of the user (2) of the field device (1) in the environment (4) of the field device (1). Furthermore, the control unit (3) is configured to actuate the at least one electrical load (8, 10, 16, 17) based on the monitoring signal, such that the electrical load (8, 10, 16, 17) can be actuated by the user (2) without physical contact.