Directional Stray Voltage Detection on Farm Grounding

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Solution Overview

Problem

Existing methods fail to adequately address transient, directional, and locational stray voltage/current issues on farms, which can change over time and vary by location, affecting livestock and milk production, as they do not consider the dynamic nature of these electrical phenomena.

Innovation Solution

A transient stray voltage detector system using a directional flow current transducer, deployed on a new grounding wire connecting to an equi-potential ground plane, monitors both the magnitude and direction of stray current, allowing for the identification and logging of transient, directional, and locational stray voltage/current problems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If existing stray voltage detection methods are used, then basic detection capability is provided, but transient, directional, and locational nature of stray voltage/current cannot be adequately identified

Engineering Contradiction:
Improvedetection accuracyVSAvoidtransient and locational data
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The detection system is divided into multiple independent directional flow current transducers, each monitoring a specific grounding wire at a specific location. This segmentation allows the system to capture transient, directional, and locational information separately, then combine the data to identify the source and nature of stray voltage issues with high precision.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention adds directional information as a new dimension to stray voltage detection. By using directional flow current transducers that can detect both magnitude and direction of current flow, the system transforms scalar voltage measurements into vector-based measurements, enabling identification of transient and locational characteristics that were previously undetectable.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Reliability

If comprehensive monitoring of transient and directional stray voltage is implemented, then accurate identification of stray voltage sources is achieved, but system complexity increases

Engineering Contradiction:
Improvestray voltage identification accuracyVSAvoiddetection system structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The directional flow current transducer serves multiple functions simultaneously: it measures current magnitude, determines current direction, and provides locational information through its installation position on specific grounding wires. This multi-functionality reduces the need for separate devices for each measurement type, thereby limiting the increase in system complexity while achieving comprehensive stray voltage identification.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses grounding wires as intermediaries to carry stray current from various farm locations to the detection point. By installing directional flow current transducers on these existing grounding infrastructure elements, the invention leverages the farm's electrical grounding system rather than building a completely new monitoring infrastructure, thus reducing overall system complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 better understanding and timely correction of stray voltage issues by providing real-time data on current flow direction and magnitude, helping to pinpoint sources and reduce their impact on livestock, thereby improving milk production and animal welfare.

Implementation Method 1

a first transducer providing an output signal indicating the magnitude of stray current carried by the new grounding wire

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS10775446B2Transient stray voltage detector and system
Publication Date: 2020.09.15 SALISBURY NOBLE M
  • US10775446B2 patent drawing
  • US10775446B2 patent drawing

AI summary

A directional flow current transducer is used as a transient stray voltage detector including a first transducer providing an output signal indicating the magnitude of stray current carried by a new grounding wire, and a second, separate transducer providing an output signal indicating the direction of the stray voltage (for either direct and/or alternating stray voltages). The new grounding wire might be between an equi-potential plane of a concrete platform for watering livestock and a grounding bus bar for grounding the service bond of the main electrical service panel, at a significant distance from the watering platform. The output of the directional flow current transducer is recorded, stored and analyzed as a function of time. Preferably by allowing comparison with the output of a second directional flow current transducer, the system allows transient, directional and locational stray voltage/stray current problems to be better identified, understood and addressed.