Firearm Magazine Round Counting via Hall Switch Encoding
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Solution Overview
Problem
Existing firearm round counting systems face challenges with inaccurate and unreliable counting due to low signal-to-noise ratios, calibration requirements, and the need for external sensors outside the magazine, which leads to errors and increased complexity.
Innovation Solution
The implementation of Hall effect switches along the full length of the follower path within the magazine, combined with a processor for signal processing and a near-field communication antenna for wireless data transmission, reduces errors and eliminates the need for calibration, providing consistent and accurate round counting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external sensors are placed outside the magazine to detect follower position, then the system can detect round count, but the signal-to-noise ratio decreases and measurement accuracy deteriorates
Solution Approach 1:
The patent extracts the sensing function from external sensors outside the magazine and relocates it to Hall effect switches mounted directly on the follower within the magazine. This extraction of the sensing element to its optimal location eliminates signal attenuation and interference, directly resolving the contradiction between detection accuracy and signal-to-noise ratio.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the follower position and the detection system. Magnets mounted on the follower interact with Hall effect switches through the magnetic field, enabling contactless, accurate position detection without mechanical wear or signal degradation, thus improving measurement precision while maintaining clean signal transmission.
2Measurement precision
If Hall effect switches are mounted on the follower within the magazine, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the follower component: it serves as both the mechanical element that tracks round consumption and the mounting platform for magnets that enable detection. This integration eliminates the need for separate sensing mechanisms and reduces overall system complexity while maintaining high measurement precision.
Solution Approach 2:
The follower is designed with multi-functionality, serving both its traditional mechanical role of tracking ammunition consumption and the new sensing role of carrying magnets for Hall effect detection. This universal application of the follower component simplifies the system by eliminating dedicated sensing hardware while improving measurement accuracy.
3Measurement precision
If multiple Hall effect switches are arranged along the follower path to improve counting accuracy, then round count precision improves, but use of energy increases
Solution Approach 1:
The patent segments the detection range into discrete zones along the follower path, with Hall effect switches positioned at specific intervals. This segmentation allows the system to use only the necessary number of switches to cover the full range of motion, optimizing the balance between measurement precision and power consumption by avoiding redundant sensing elements.
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
This solution achieves reliable, accurate, and low-power round counting by maximizing magnetic field strength and minimizing signal interference, resulting in a lightweight and user-friendly system.
Implementation Method 1
Hall effect switches arranged substantially along a path of the one or more magnets, where N is a maximum number of cartridges that can be loaded in the magazine, the Hall effect switches each generating a high or low signal based on a position of the one or more magnets relative to each of the Hall effect switches
Data Source
AI summary
This disclosure describes systems, methods, and apparatus for detecting and displaying a number of rounds in a firearm magazine comprising a maximum number of N rounds. The magazine may comprise a follower, magnets on the follower, and <N magnetic-field-sensing sensors arranged along a path of the magnets when the follower moves along a length of the magazine, the sensors generating round count data based on a position of the one or more magnets relative to the <N magnetic-field-sensing sensors, and a first substantially flat antenna arranged on an inside of the magazine and configured to wirelessly transmit a round count indication to a second substantially flat antenna on the firearm, the round count indication based on the round count data, the second substantially flat antenna affixed to an inside of a magazine well of the firearm and mostly overlapping with the first substantially flat antenna.