Combined Electrical Measurement Device Shielding
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Solution Overview
Problem
Existing measurement devices for electrical conductors lack effective shielding against external electric disturbances, leading to inaccurate low-level power output signals and increased complexity and cost.
Innovation Solution
A combined measurement device featuring a supporting body with a current sensor and a voltage sensor partially shielded by a conductive or semi-conductive tape, which also shields the voltage sensor, along with optional additional magnetic shielding, to protect against electric and magnetic disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate shielding structures are added for current and voltage sensors, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines the shielding structures for the current sensor and voltage sensor into a single integrated shielding body. This unified shielding structure simultaneously protects both sensors from external electric disturbances, achieving the measurement accuracy improvement while avoiding the complexity increase that would result from separate shielding structures.
Solution Approach 2:
The shielding body serves multiple functions: it acts as the supporting structure for both sensors, provides electromagnetic shielding for both sensors, and maintains the spatial arrangement of the sensors. This multi-functionality eliminates the need for additional dedicated shielding components, resolving the contradiction between measurement accuracy and device complexity.
2Reliability
If multiple separate shields are used for current and voltage sensors, then protection against disturbances is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the shielding functions into a single integrated shielding body that protects both sensors. This unified structure is manufactured as one piece rather than assembling multiple separate shields, significantly simplifying the manufacturing process while maintaining comprehensive protection against electric and magnetic disturbances for both sensors.
Solution Approach 2:
The shielding body is made from electrically conductive material that provides both electric and magnetic shielding capabilities. This composite material approach allows a single structure to provide multiple types of protection, improving reliability against various disturbances while keeping manufacturing simple.
3Reliability
If additional shielding components are added, then measurement reliability is improved, but production time increases
Solution Approach 1:
The patent integrates the shielding function into the supporting body structure itself, eliminating the need for separate shielding components that would require additional assembly steps. This unified structure is manufactured in a single process, reducing production time while ensuring comprehensive shielding protection for both sensors, thereby improving measurement reliability.
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
The solution provides accurate and reliable measurements by effectively shielding both current and voltage sensors, simplifying design and manufacturing while reducing the need for additional shields, making it suitable for use in switchgear and electrical circuits.
Implementation Method 1
a shielding positioned around said current sensor, wherein said current sensor and said voltage sensor are mutually arranged so as said shielding shields at least partially both said current sensor and at least part of said voltage sensor against external electric disturbances
Data Source
AI summary
A combined measurement device for measuring current and/or voltage of an electrical conductor, comprising a supporting body, a current sensor housed inside the supporting body, and a voltage sensor located at least partially inside the supporting body. A shielding is positioned around the current sensor. The current sensor and the voltage sensor are mutually arranged so as the shielding shields at least partially both the current sensor and the voltage sensor against external electric field disturbances.