Integrated Rogowski Coil and Non-Contact Voltage Sensor Probe
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Solution Overview
Problem
Existing measurement instruments face challenges in efficiently and safely measuring electrical parameters like voltage and current, especially in tight spaces, as they often require manual manipulation and galvanic connections, which can be cumbersome and dangerous.
Innovation Solution
A sensor probe system integrating a Rogowski coil and a non-contact voltage sensor, where the Rogowski coil forms a loop and the non-contact sensor is positioned on a spring-loaded clamp, allowing the conductor to be held in a central region for accurate measurements without continuous user intervention, enabling non-contact sensing and reducing the need for manual manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two different sensor probes are used to measure current and voltage, then measurement capability is improved, but operation complexity and safety risks increase
Solution Approach 1:
The patent combines a Rogowski coil for current measurement and a non-contact voltage sensor for voltage measurement into a single integrated sensor probe. This merging eliminates the need to handle multiple separate probes, reducing operational complexity while maintaining the ability to measure both current and voltage simultaneously. The unified probe design allows both sensing elements to be positioned relative to the conductor in a coordinated manner.
2Measurement precision
If manual manipulation of sensor probes is required, then positioning accuracy is improved, but productivity and safety decrease
Solution Approach 1:
The sensor probe is pre-configured with the Rogowski coil and non-contact voltage sensor positioned at optimal distances and orientations relative to each other. This preliminary arrangement ensures that when the probe is placed around the conductor, both sensors are automatically in their correct positions for accurate measurement, eliminating the need for continuous manual adjustment during the measurement process.
3Measurement precision
If galvanic connections are used for measurement, then measurement accuracy is improved, but safety risks increase
Solution Approach 1:
The patent replaces galvanic (physical contact) connections with non-contact sensing methods. The voltage measurement is performed using a non-contact voltage sensor that detects the electric field around the conductor without requiring physical contact. The current measurement uses a Rogowski coil that senses the magnetic field generated by the current flow. This substitution eliminates the safety risks associated with galvanic connections while maintaining measurement capability.
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 configuration allows for continuous, accurate measurement of electrical parameters like current and voltage without the need for continuous user manipulation, enhancing safety and efficiency, especially in tight spaces, by optimizing the placement of the conductor within the Rogowski coil and using non-contact sensors to avoid galvanic connections.
Implementation Method 1
a Rogowski coil having first and second leads at opposing ends, the Rogowski coil having a central region configured to receive a conductor to be tested
Implementation Method 2
a non-contact sensor configured to sense a first electrical parameter of the conductor without requiring a galvanic connection with the conductor
Data Source
Figure 1A~1B
Figure 1C
Figure 1D
AI summary
One or more implementations of the present disclosure are directed to sensor probes of measurement systems for measuring a plurality of electrical parameters, (e.g., voltage, current) of a conductor and methods for measuring same. In at least one implementation, the sensor probe integrates a Rogowski coil and a non-contact voltage sensor that are arranged relative to each other such that when positioned to measure a conductor, such as a wire, the Rogowski coil and the non-contact voltage sensor are held in proper position for measurement.