Inclinometer Alarm for Self-Retracting Lanyard
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Solution Overview
Problem
Conventional self-retracting lanyards do not provide adequate warning to individuals approaching potentially dangerous locations, leading to minor injuries and loss of confidence in operating at elevated environments.
Innovation Solution
An alarm device integrated with a self-retracting lanyard that uses an inclinometer to detect angles relative to a vertical axis and generate alert signals when the angle exceeds a preset threshold, triggering visual, audible, or vibrational alerts to warn the user of unsafe positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-retracting lanyard is used to provide fall protection, then severe injury from falls is prevented, but no warning is provided to prevent minor injuries or loss of confidence
Solution Approach 1:
The inclinometer continuously monitors the angle of the retractable line before a fall occurs, and the alarm element provides advance warning when the angle exceeds a predetermined threshold. This preliminary detection and warning system allows the user to correct their position before entering a dangerous situation, preventing minor injuries and maintaining confidence while preserving the existing fall protection capability.
2Speed
If the lanyard remains taut to provide immediate fall protection, then response time in case of fall is minimized, but the user experiences restricted movement
Solution Approach 1:
The inclinometer provides continuous feedback about the angle of the retractable line, and the alarm element gives immediate feedback when the angle exceeds the safety threshold. This feedback mechanism allows the user to adjust their movement to maintain safety without restricting their natural movement freedom, while the lanyard itself remains taut to ensure immediate fall protection response.
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 alarm device effectively alerts users to potentially hazardous areas, reducing the likelihood of falls and other injuries by prompting them to return to safe zones, thereby enhancing safety and confidence in elevated work environments.
Implementation Method 1
an inclinometer coupled to the housing and adapted to detect a magnitude of an angle between the detection axis and a vertical axis
Data Source
AI summary
An alarm device adapted for use with a self-retracting lanyard having a main body and a retractable line coupled to the main body. The alarm device includes a housing adapted to be engageable with the retractable line. The housing defines a detection axis, with the housing being adapted to allow at least a portion of the retractable line to be parallel to the detection axis when the housing is engaged with the retractable line. An inclinometer is coupled to the housing and is adapted to detect a magnitude of an angle between the detection axis and a vertical axis, and generate an electrical signal when the magnitude exceeds a preset threshold. An alarm element is in communication with the inclinometer to receive the electrical signal generated by the inclinometer. The alarm element is adapted to generate an alert signal in response to receipt of the electrical signal.