Switchable Current Interface Electronics for Field Measuring Devices
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Solution Overview
Problem
Field measuring devices face complexity and inflexibility in implementing various interface options, requiring multiple hardware variations for different functionalities.
Innovation Solution
The integration of a current controller and current measuring device in series within the interface electronics, along with a voltage source that can be switched on or disconnected, allows for flexible implementation of analog and binary current signal output and input functionalities without the need for multiple hardware variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple hardware variations are implemented for different interface options, then interface functionality is provided, but device complexity increases
Solution Approach 1:
The patent implements a single interface electronics design that can perform multiple interface functions (analog current output, analog current input, binary current output, binary current input) through software configuration of the measuring and control device. The current controller and current measuring device serve multiple purposes depending on their configuration, eliminating the need for separate hardware for each interface type.
Solution Approach 2:
The patent uses a switchable voltage source that can be dynamically activated or deactivated based on the required interface function. The measuring and control device configures the current controller and current measuring device differently depending on whether analog or binary signal transmission is needed, allowing the system to adapt its behavior rather than requiring fixed hardware for each function.
2Ease of operation
If voltage source is permanently activated for active current driving, then current signal output capability is improved, but energy consumption increases
Solution Approach 1:
The voltage source is activated only when needed for active current driving and deactivated when not required. The measuring and control device manages the switching of the voltage source based on the operational requirements, ensuring that energy is consumed only during periods when active current output is necessary rather than continuously.
Solution Approach 2:
The system dynamically switches the voltage source between active and inactive states based on the required interface function. When analog or binary current output is needed, the voltage source is activated; when current input is required, the voltage source is deactivated. This dynamic control optimizes energy consumption while maintaining full operational capability.
Data Source
AI summary
A field measuring device includes a sensor, a measuring transducer, and interface electronics. The interface electronics include a measuring and control device, and first and second terminals for connecting an external electrical device. A current controller and a current measuring device are connected in series in a terminal current path between the first and second terminals. The interface electronics has a voltage source that can be switched on in the terminal current path and disconnected from the terminal current path, so that the voltage source can drive a current in the terminal current path in the switched-on state and in the case of a connected external electrical device. The measuring and control device actuates and reads the current controller, the current measuring device, and the voltage source such that a current signal is output or input via the first and second terminals when an external device is connected.