Arrow Rest Position Measurement With Weight Offsetting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current devices for measuring arrow position on a bow are inaccurate and inconsistent, particularly in determining the vertical position of the arrow relative to the bow string, as they rely on external references and cannot account for the flexing of the arrow rest due to the arrow's weight, leading to unreliable measurements.
Innovation Solution
A device that measures both horizontal and vertical positions of the arrow simultaneously, using a weight offsetting system to lift the arrow off the rest and maintain a consistent measurement, and includes a leveling mechanism to reference the inside surface of the bow riser, ensuring accurate and repeatable readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the arrow is left to rest on the arrow rest with its full weight, then the measurement setup is simple, but the arrow rest launcher flexes downward causing inaccurate vertical position measurements
Solution Approach 1:
The patent employs a weight offsetting system that applies an upward force through the launcher to counterbalance the downward force of the arrow's weight. This prevents the launcher from flexing downward, maintaining the arrow's vertical position at the correct measurement point relative to the bow riser, thereby resolving the measurement accuracy issue without requiring complex external reference systems.
Solution Approach 2:
The patent introduces a leveling reference as an intermediary element between the measurement system and the bow riser. This leveling reference provides a stable, known reference surface that allows for accurate horizontal and vertical position measurements while accounting for variations in bow models and setup configurations.
2Reliability
If manual lifting of the arrow is used to estimate vertical position, then the measurement process is simple, but the results are not repeatable and cannot be reliably measured
Solution Approach 1:
The patent implements a self-adjusting weight offsetting system that automatically applies the necessary upward force to counterbalance the arrow's weight. The system self-regulates to maintain the arrow in the correct position without requiring manual intervention or estimation, ensuring repeatable and reliable measurements while maintaining ease of operation.
Solution Approach 2:
The patent incorporates a leveling mechanism that provides feedback on the arrow's position relative to the bow riser. This feedback system allows the user to adjust the arrow rest position to achieve the correct horizontal and vertical alignment, ensuring repeatable measurements through objective rather than subjective judgment.
3Measurement precision
If measurements are taken with the arrow on the rest, then the setup is straightforward, but the center of gravity position causes torque and flexing that reduces measurement accuracy
Solution Approach 1:
The patent directly addresses the torque and flexing issue by implementing a weight offsetting system that applies an upward force through the launcher. This counterbalances the downward force created by the arrow's center of gravity being forward of the rest, eliminating the torque-induced flexing and maintaining measurement accuracy.
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
Provides precise and consistent measurements of arrow position relative to the bow riser, accounting for variations in bow models and arrow weight, thereby improving archery accuracy and consistency.
Implementation Method 1
The mass of the arrow positioned at the CG of the arrow is cantilevered as the aft end of the arrow is attached to the bow string. The arrow rest/launcher positioned between the arrow's CG and the bow string generates a torque and associated force on the arrow rest's launcher resulting in the launcher yielding/flexing down from its natural resting position.
Implementation Method 2
A device that measures both horizontal and vertical positions of the arrow simultaneously, using a weight offsetting system to lift the arrow off the rest and maintain a consistent measurement, and includes a leveling mechanism to reference the inside surface of the bow riser
Data Source
AI summary
A device is disclosed for measuring arrow position or location at rest. An example device includes a platform that mounts to an archery bow system to determine a position of an arrow shaft in relation to an inside of a riser shelf of the archery bow system for tuning or data collection. The example device also includes a first slot in the platform. A center shot indicator adjacent to the first slot references the center shot of the arrow shaft. A measurement reference is slidable, separately, in the first slot to reference center shot of the arrow shaft.