Cable Locator Auto-Logging Using Phase-Coherent Antenna Triggers
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Solution Overview
Problem
Existing cable locating instruments face challenges in automatic and accurate data logging, particularly when human intervention is required, leading to inefficiencies and potential errors in positioning and mapping underground utilities.
Innovation Solution
An underground line locator system with a spatial array of antennas and control electronics that automatically triggers data logging based on predefined conditions, including phase coherence, roll angle, and vector alignment, eliminating the need for human judgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic data logging is implemented without human intervention, then productivity is improved, but measurement precision may deteriorate due to lack of human judgment
Solution Approach 1:
The system continuously monitors multiple parameters (phase coherence, signal strength, roll angle, cable direction, vector displacement) and uses this feedback to dynamically adjust logging decisions. This closed-loop feedback mechanism ensures that automated logging maintains high precision by only recording data when multiple quality conditions are simultaneously satisfied, eliminating the need for human judgment while preserving measurement accuracy.
Solution Approach 2:
The system changes the state of the logging function based on multiple dynamic parameters including phase coherence thresholds, signal strength levels, roll angle ranges, and vector displacement values. By monitoring changes in these parameters and triggering logging events based on their combined state, the system achieves both high productivity through automation and high precision through multi-parameter validation.
2Measurement precision
If multiple conditions are monitored for log triggering, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The control electronics perform multiple functions using the same hardware components: signal acquisition, phase coherence calculation, roll angle measurement, cable direction determination, vector displacement calculation, and logging control. By making the control system multi-functional, the patent avoids adding separate dedicated hardware for each function, thus improving data quality through comprehensive monitoring while limiting the increase in device complexity.
Solution Approach 2:
The patent combines multiple monitoring functions (phase coherence, signal strength, roll angle, cable direction, vector displacement) into a single integrated logging trigger mechanism. Instead of having separate systems for each parameter, all conditions are merged into one unified control logic that determines whether to trigger a log event, simplifying the overall control architecture while maintaining high measurement precision.
3Ease of operation
If automated trigger conditions are used, then ease of operation is improved, but reliability may worsen due to potential false triggers
Solution Approach 1:
The system performs preliminary calculations and assessments of multiple parameters (phase coherence, signal strength, roll angle, cable direction, vector displacement) before triggering a logging event. By evaluating all these conditions in advance and requiring them to be satisfied simultaneously, the system prevents false triggers while maintaining high automation, thus improving ease of operation without sacrificing reliability.
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 precise and efficient data logging without human intervention, improving accuracy and reducing errors in mapping underground utilities, especially in complex environments with multiple cables or obstructions.
Implementation Method 1
a spatial array of antennas, the spatial array of antennas detecting an alternating magnetic field emanating from a buried conductor
Data Source
AI summary
According to some embodiments, a cable locating instrument automatically senses the characteristic behavior associated with tracing the position of a utility such as a buried pipe or cable. Various measurements and derivations are amalgamated into a single trigger event which causes the instrument to create a logging data record. In accordance with some embodiments of this disclosure, a method of operating a line locator system includes processing signals from each antenna in an array of antennas, the antennas includes a set of three orthogonal antennas forming a top sensor and a set of three orthogonal antennas forming a bottom sensor, to determine magnitude and phase of each of the signals from each antenna; activating a log trigger based on the magnitude and phase; and logging locate data when the log trigger is activated.