Detachable Current Clamp Meter for One-Handed Operation
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Solution Overview
Problem
Conventional current clamp meters face challenges such as inconvenient wire disconnection, potential safety hazards, and display accessibility issues when measuring currents in difficult-to-reach locations, often requiring two hands and separate storage, which can be costly and inefficient.
Innovation Solution
A detachable current clamp meter design that allows the current clamp to be operated either attached or detached from the meter body, enabling one-handed measurements and convenient display viewing by integrating the clamp probe into the meter housing with a detachable retention system and optional light for improved usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clamp probe is connected to the multimeter through plug-in terminals, then the meter can be positioned conveniently for viewing measurements, but two hands are required for operation and the clamp must be stored separately
Solution Approach 1:
The clamp meter is divided into two separable components: a clamp unit with its own display and a meter unit with measurement circuits. This segmentation allows the clamp to be positioned on the wire while the meter is held separately, enabling one-handed operation while maintaining measurement position flexibility.
Solution Approach 2:
A detachable connection mechanism serves as an intermediary between the clamp unit and meter unit. This intermediary allows the components to be connected during measurement and separated for storage or repositioning, resolving the contradiction between integrated operation and flexible positioning.
2Adaptability or versatility
If the clamp is integrated into the body of the meter, then one-handed operation is possible and storage is simplified, but the display cannot be positioned conveniently when the wire is difficult to reach
Solution Approach 1:
The clamp meter is divided into two separable components: a clamp unit with its own display and a meter unit with measurement circuits. This segmentation allows the clamp to be positioned on the wire while the meter is held separately, enabling one-handed operation while maintaining measurement position flexibility.
3Measurement precision
If the wire is cut to connect the current meter in series, then the measurement can be taken, but the wire integrity is compromised and reconnection is time-consuming and dangerous
Solution Approach 1:
The measurement function is extracted from the wire connection by using a clamp-based current sensor that measures current through magnetic induction without requiring series connection. This eliminates the need to cut or disconnect the wire, preserving wire integrity while enabling current measurement.
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 a cost-effective, safe, and efficient means to measure currents with improved accessibility and convenience, allowing one-handed operation and flexible positioning of the display, reducing the need for multiple meters and enhancing measurement efficiency.
Implementation Method 1
The closed clamp includes a core of ferromagnetic material, which when closed, represents the core of a transformer. The wire passing through the clamp represents the primary winding. As known, a current flowing in the wire induces a magnetic flux in the core of the transformer, which in turn, induces a current in a secondary winding of the transformer.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A current clamp meter having a current meter body and a detachable current clamp. The current meter body and the current clamp are configured so that the current clamp is detachable from the current meter body and the meter is operable with the current clamp either attached to the current meter body or detached from the current meter body.