Inductive Current Sensor with Detection Module for Automatic Range Calibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing contactless current measurement devices, such as current transformers with ferromagnetic cores, require manual setting of conversion values, which can lead to errors, especially in complex installations like building monitoring, due to the need for standardized output signals across different applications.
Innovation Solution
A measuring sensor with an inductive current transformer and a detection module that automatically determines the measuring range of the current transformer, using a response signal to select a suitable conversion value, either through resistive elements or a microchip, allowing for error-free selection and adaptation to different measuring ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual setting of conversion values is used during installation, then adaptability to different measuring ranges is achieved, but errors in conversion value selection occur leading to measurement inaccuracies
Solution Approach 1:
The detection module automatically detects the measuring range of the connected current transformer and selects the appropriate conversion value without human intervention. The system performs self-configuration by reading the measuring range from the detection module and automatically setting the correct conversion factor, eliminating manual setting errors while maintaining adaptability to different measuring ranges
Solution Approach 2:
The detection module provides feedback about the connected current transformer's measuring range to the control unit. This feedback mechanism enables the system to automatically adjust the conversion value based on the detected measuring range, ensuring measurement accuracy without requiring manual configuration
2Reliability
If standardized output signals are used across different current transformers, then electrical safety and measurement chain standardization are improved, but manual configuration errors increase in complex installations
Solution Approach 1:
The system automatically configures itself by detecting the current transformer type and measuring range through the detection module. This self-service capability maintains the standardized output signal structure while eliminating the need for manual configuration, making installation simple even in complex environments with multiple different current transformers
Solution Approach 2:
The detection module serves multiple functions: it identifies the current transformer type, determines the measuring range, and selects the appropriate conversion value. This multi-functionality maintains universal compatibility with different current transformer types while simplifying installation through automatic configuration
3Measurement precision
If automatic detection of measuring range is implemented, then measurement accuracy is improved, but device complexity increases due to additional detection module components
Solution Approach 1:
The detection module is integrated into the existing terminal connection structure between the current transformer and measuring transducer. The detection components are merged with the terminal contacts, allowing automatic measuring range detection without adding separate complex external devices, thus improving accuracy while limiting complexity increase
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
Enables fully automatic and error-free determination of current values, reducing errors in power supply system monitoring by automatically identifying the current transformer and selecting the correct conversion value, thus improving measurement accuracy and simplifying installation.
Implementation Method 1
inductive current transformer for generating an electrical measuring signal depending on a current flow in a conductor passed through the inductive current transformer
Data Source
AI summary
A measuring sensor, a measuring device, a detection module, a measuring method and a calibration method are disclosed. In an embodiment a measuring sensor includes at least one inductive current transformer configured to generate an electrical measurement signal dependent on a current flow in a conductor passing through the inductive current transformer, a terminal configured to connect the inductive current transformer to a measuring transducer, wherein the inductive current transformer is electrically connected to at least two terminal contacts of the terminal in order to transmit the electrical measuring signal to the measuring transducer and a detection module connected between the inductive current transformer and the two terminal contacts, wherein the detection module is configured to return a response signal when a retrieval signal is applied to the two terminal contacts.