Multimeter Probe Box Layout for Low-Resistance 30 A Measurement
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Solution Overview
Problem
Conventional multimeters face issues with ineffective reduction of loop resistance during high current measurements, leading to heat generation and potential product deformation or damage due to spatial limitations.
Innovation Solution
An electronic measuring instrument with a specific configuration of holes and terminals, incorporating metal elastic pieces and copper-embedded inserts, along with a logic circuit and micro-control unit, to manage high current measurements safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional multimeter with universal test probe is used for high current measurement, then the device can perform standard measurements with universal format, but the loop resistance cannot be reduced effectively and heat cannot be dissipated causing product deformation
Solution Approach 1:
The invention divides the measurement device into two separate components: a multimeter main body and a dedicated meter pen box for high current measurements. The meter pen box contains specialized low-resistance terminals and copper-embedded inserts designed specifically for high current paths, while the multimeter maintains its universal test probe capability for other measurements. This segmentation allows each component to be optimized for its specific function without compromise.
Solution Approach 2:
The meter pen box acts as an intermediary device between the multimeter and the high current measurement circuit. It provides a dedicated connection path with low loop resistance and effective heat dissipation capability, while the multimeter itself remains unaffected by the high current thermal loads. The meter pen box mediates the high current flow through its specialized terminals and copper-embedded inserts.
2Ease of operation
If the multimeter is designed with compact handheld form factor, then the product is portable and easy to operate, but the loop resistance cannot be reduced effectively for high current measurement
Solution Approach 1:
The invention separates the portable multimeter from the high current measurement functionality by introducing a dedicated meter pen box. The multimeter remains compact and portable for ease of operation, while the meter pen box provides the specialized low-resistance connection path and thermal management needed for safe high current measurements up to 30A.
Solution Approach 2:
The meter pen box serves as an intermediary that enables safe high current measurements without requiring the multimeter itself to handle the high current loads. It provides the low loop resistance connection path and thermal dissipation capability, allowing the compact multimeter to safely perform high current measurements through this dedicated interface.
3Adaptability or versatility
If universal test probe with standard format is used, then the device can measure various electronic products without limitation, but the loop resistance through which current flows cannot be reduced effectively
Solution Approach 1:
The invention creates two distinct measurement paths: one through the universal test probe for low current measurements, and another through the meter pen box with specialized terminals for high current measurements. The meter pen box contains copper-embedded inserts and low-resistance terminals specifically designed to minimize loop resistance for high current applications, while the universal test probe maintains its versatility for other measurements.
Solution Approach 2:
The meter pen box acts as an intermediary device that provides a dedicated low-resistance measurement path for high current applications. It interfaces between the multimeter and high current circuits, offering specialized terminals with copper-embedded inserts that minimize loop resistance, while the universal test probe continues to serve general-purpose measurement needs.
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 safe and efficient high current measurements up to 30 A without product deformation, while maintaining international safety standards and providing alert messages for correct usage.
Implementation Method 1
the metal elastic pieces respectively in contact with the copper-embedded inserts when the first terminal and the second terminal are respectively plugged into the first hole and the second hole
Implementation Method 2
a loop between the first hole and the second hole is formed through the meter pen box when the first terminal and the second terminal are plugged into the first hole and the second hole respectively for determining whether the electric meter is plugged with the meter pen box through the logic circuit
Data Source
AI summary
An electronic measuring instrument comprise: an electric meter equipped with a first to fourth hole and a logic circuit, and a meter pen box comprising a circuit board. One end of the meter pen box is equipped with a first to fourth terminal. Another end of the meter pen box is equipped with a pair of test probes. The first to fourth terminals are correspondingly plugged into the first to fourth holes. The circuit board is coupled to the third terminal, the fourth terminal and the pair of test probes. A metal elastic piece is included in each one of the first terminal and the second terminal. A loop between the first hole and the second hole is formed through the meter pen box when the first terminal and the second terminal are plugged into the first hole and the second hole respectively for determining whether the electric meter is plugged with the meter pen box through the logic circuit.