Multipoint Clamp Meter Calibration for Conductor Positioning

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Solution Overview

Problem

Existing clamp meters require the conductor to be positioned at the exact middle of the hook for accurate current measurement, limiting convenience and accuracy if not aligned correctly.

Innovation Solution

A clamp meter with multipoint measurement capabilities, featuring a current-measuring unit with multiple calibrated positions and a measuring-position judgment unit that allows for selection or detection of the current-measuring position, enabling accurate measurement at various points along the hook part, including the middle, top valley, and bottom valley.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the conductor is positioned at the middle of the hook part for accurate measurement, then measurement precision is improved, but ease of operation deteriorates due to the requirement for precise alignment

Engineering Contradiction:

Improvecurrent measurement accuracyVSAvoidconductor positioning convenience

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The hook part is divided into multiple calibrated current-measuring positions (first position, second position, third position) along its length. Each position is independently calibrated, allowing the system to segment the measurement function across multiple locations rather than relying on a single central position, thus resolving the contradiction between precision and ease of operation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The clamp meter is designed with multi-functionality to measure current accurately at multiple positions (middle, top valley, bottom valley) of the hook part. The measuring-position judgment unit and calibrated current-measuring positions enable the device to universally handle measurements regardless of conductor placement, eliminating the need for precise alignment while maintaining accuracy

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple calibrated positions are added to the current-measuring unit, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvemeasurement position flexibilityVSAvoidcurrent-measuring unit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The measuring-position judgment unit automatically detects which calibrated position the conductor is placed at and selects the corresponding calibration data without requiring manual intervention. This self-service mechanism reduces operational complexity while maintaining the adaptability benefits of multiple calibrated positions

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces complex mechanical alignment systems with an automated detection and judgment system. The measuring-position judgment unit uses electrical or magnetic detection methods to identify conductor position and apply appropriate calibration, substituting mechanical precision requirements with electronic intelligence, thus improving adaptability without proportionally increasing complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8754636B2Clamp meter with multipoint measurement

Publication Date: 2014.06.17 BRYMEN TECHNOLOGY CORP

AI summary

A clamp meter with multipoint measurement includes a current-measuring unit, an analog-to-digital converting unit, and a measuring-position judgment unit. The current-measuring unit includes a plurality of current-measuring positions calibrated according to the measuring-position judgment unit. The current-measuring unit measures the current of the current-measuring position judged by the measuring-position judgment unit.