Multi-channel Handheld Digital Multimeter with Separate Common Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digital multimeters (DMMs) cannot accurately conduct concurrent measurements of two signals due to a lack of independent measurement channels with separate points of reference.
Innovation Solution
A handheld DMM device with two or more independent measurement channels, each having its own dedicated user control interface and electrically isolated from the other, allowing for simultaneous measurement and processing of results, which can be displayed together on a single display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single common terminal is used for multiple measurement channels, then device complexity is reduced, but measurement precision deteriorates due to inability to conduct accurate concurrent measurements
Solution Approach 1:
The patent divides the measurement system into separate measurement channels, each with its own common terminal. This segmentation allows independent reference points for each channel, enabling accurate concurrent measurements without requiring a single shared reference that would compromise precision.
2Adaptability or versatility
If multiple measurement channels are added to enable concurrent measurements, then measurement capability is improved, but device complexity increases due to separate terminals and electrical isolation requirements
Solution Approach 1:
The patent implements multiple measurement channels with separate common terminals that are electrically isolated from each other. This segmentation enables concurrent measurements on different circuits without interference, while the electrical isolation ensures that each channel maintains its own reference point, preventing ground loops and measurement errors.
3Measurement precision
If separate common terminals are provided for each measurement channel, then measurement precision is improved, but ease of operation worsens due to multiple terminals requiring management
Solution Approach 1:
The patent provides separate common terminals for each measurement channel, clearly labeled and positioned for easy identification. Each terminal serves a specific channel, eliminating the confusion of shared references and enabling users to correctly connect test leads for concurrent measurements without worrying about reference conflicts.
Data Source
AI summary
A single handheld multimeter device includes two or more independent measurement channels that are completely electrically separated and independent from one another. Each measurement channel has its point of reference, typically configured to be coupled to the ground. Measurements by the two or more independent measurement channels can be conducted concurrently, and the measurement results of the two channels can be processed and displayed together.