Deflection detection system utilizing an energized beam

Abstract

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.

Description

BACKGROUND1. Field[0001]Embodiments of the invention relate to aerial devices. More specifically, embodiments of the invention relate to the detection of deflection of insulated boom sections.2. Related Art[0002]Utility workers utilize an aerial device to reach inaccessible locations. The aerial device generally includes a boom assembly with a utility platform assembly 16 connected to a distal end of the boom. One or more utility workers stand in the utility platform assembly. Utility workers typically use an aerial device to access overhead electric power lines and electric power components for installation, repair, or maintenance. The utility workers may also lift repair parts and other objects utilizing a jib associated with the utility platform assembly. The utility platform assembly and at least one boom section are highly insulated so as to prevent the discharge of electricity through the utility truck, and especially through the utility worker. Because at least one boom secti...

AI Technical Summary

Benefits of technology

The invention provides a deflection detection system to prevent damage to an insulated boom by measuring the deflection of the boom section. The system uses a beam of light that is emitted from one end of the boom and impacted by the load on the boom at the other end. The impact location is measured by detecting the target-impact indication. This system can be installed in the boom section and can help prevent accidents and reduce damage to the boom.

Problems solved by technology

Not exceeding these allowable limits is important due to the increased likelihood of catastrophic fiberglass boom section failure following overloading conditions.

A limitation of the manufacturer-provided information is the user's lack of available equipment and methods to conveniently and accurately determine the boom load.

A complication for the user in determining the load limit is that the limit varies with the upper and lower boom position relative the earth and relative to each other.

This complication causes many users confusion in determining maximum allowable load and as a result this determination is not made.

Further, users may not be aware of the actual load that they will apply to the boom as is the case, for example, in supporting a power and communications cable when the cable is temporarily removed from a utility pole during a repair procedure.

Instead, users often rely on their intuitive judgement to assess the degree of load, endangering the user and the boom structure.

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