Optical Beam Deflection Detection for Insulated Boom Load Monitoring
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Solution Overview
Problem
Utility workers face challenges in accurately determining the load limits of insulated boom sections in aerial devices, leading to potential structural damage due to overloading, as the load limits vary with boom position and lack of convenient measurement methods.
Innovation Solution
A deflection detection system that measures the deflection of the upper boom section using a beam source and target installed at the ends of the boom, with a processor determining deflection based on the impact location of the beam, providing real-time load estimation and alerting users to potential overloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users rely on intuitive judgement to assess boom load, then the assessment process is simple and quick, but the accuracy of load assessment is poor and structural damage may occur
Solution Approach 1:
The patent replaces complex mechanical load measurement systems with an optical beam-based deflection detection system. A beam (laser, ultrasound, or electromagnetic) is emitted from a source at one end of the boom to a target at the other end, and deflection is detected by measuring changes in the beam's impact location, thereby substituting mechanical sensors with an optical field-based measurement approach
Solution Approach 2:
The patent introduces a beam as an intermediary element between the boom structure and the detection system. The beam serves as a mediator that interacts with the boom's deflection without requiring direct mechanical contact or complex sensor installation on the boom itself, simplifying the overall measurement system
2Measurement precision
If manufacturer-provided load limit information is used, then the information is readily available, but the information does not account for varying boom positions and is not accurate for real-time operation
Solution Approach 1:
The patent implements a feedback mechanism where the beam-based deflection detection system continuously monitors boom deflection in real-time, and this information is fed back to indicate whether the current load exceeds safe limits. The system provides ongoing feedback rather than relying on static manufacturer information, enabling dynamic load management throughout operation
Solution Approach 2:
The boom structure itself serves the dual function of being both the load-bearing element and the measurement object. By measuring deflection of the boom under its own weight and applied loads, the system uses the boom's inherent mechanical response as the measurement signal, eliminating the need for separate reference standards or complex calibration procedures
3Reliability
If fiberglass boom sections are used for insulation, then electrical safety is improved, but structural strength is reduced and the boom is more susceptible to damage from overloading
Solution Approach 1:
The patent replaces mechanical strain gauges or load cells that would require drilling into the fiberglass boom with an optical beam-based deflection detection system. This substitution avoids compromising the structural integrity of the fiberglass boom while still enabling accurate deflection measurement for load monitoring
Solution Approach 2:
The beam acts as an intermediary that measures boom deflection without requiring physical attachment to or penetration of the fiberglass boom structure. This non-intrusive measurement approach preserves the structural strength and electrical insulation properties of the fiberglass boom while enabling load monitoring
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 system effectively prevents structural damage by accurately measuring boom deflection and alerting users to excessive loads, ensuring safe operating conditions for both the user and the boom structure.
Implementation Method 1
The beam source is configured to be installed into a hollow boom section at a first end and configured to emit a beam. The beam target configured to be installed into the hollow boom section at a second end that is opposite the first end.
Data Source
AI summary
A deflection detection system determines a deflection of a boom assembly. The deflection detection system may include a beam source, a beam target, and a processor. The beam source is configured to be installed into a hollow boom section at a first end and configured to emit a beam. The beam target configured to be installed into the hollow boom section at a second end that is opposite the first end. The processor is configured to instruct the beam source to emit the beam; acquire a first target-impact indication that is associated with a first impact location of the beam on the beam target; acquire a second target-impact indication that is associated with an impact location of the beam on the beam target; and determine a deflection of the hollow boom section based at least in part on the first target-location and the second target-location indication.