Turntable Rotation Detection with Hall Sensors for Gyroscope Correction
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Solution Overview
Problem
Existing detection devices using gyroscopes for turntable rotation detection suffer from characteristic errors, leading to inaccurate detection of DJ operations due to inconsistencies between detected and actual rotation states.
Innovation Solution
A detection device incorporating hall elements and a magnetic body to detect the rotation state of a turntable, combined with a gyroscope sensor for correction, ensures high-accuracy detection by analyzing rotation information using Hall effect signals and gyroscope inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gyroscope is used to detect turntable rotation, then the device can detect rotation state, but the detection accuracy deteriorates due to characteristic errors of the gyroscope
Solution Approach 1:
The patent combines multiple detection methods (gyroscope-based detection and Hall element-based detection) into a unified system. The gyroscope sensor and Hall elements work together to detect turntable rotation, with each method compensating for the weaknesses of the other. The gyroscope provides continuous rotation data while Hall elements provide reference position information, merging their strengths to achieve accurate detection.
Solution Approach 2:
The system implements feedback by continuously comparing the rotation state detected by the gyroscope with the reference position information from the Hall elements. The control unit uses this feedback to correct detection errors and maintain accurate tracking of the turntable's rotation state, compensating for gyroscope characteristic errors through continuous validation.
2Measurement precision
If multiple detection methods are combined to improve accuracy, then detection precision improves, but device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes gyroscope data, processes Hall element signals, integrates information from both sensors, and generates control commands. This multi-functional design consolidates what could be separate complex components into a single universal controller, reducing overall system complexity while maintaining high detection precision.
Solution Approach 2:
The control unit acts as an intermediary that mediates between the gyroscope sensor and Hall elements. Instead of requiring direct integration between multiple sensors and multiple processing units, the control unit receives inputs from both sensors and produces a unified detection output, simplifying the system architecture while achieving accurate rotation detection.
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 accurately detects turntable rotation states, enabling precise control of music playback and DJ operations, maintaining system functionality even in the event of hall element failures.
Implementation Method 1
a rotation detector (RD) which detects the rotation state of the rotating body (41)
Data Source
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AI summary
A detection device (2) includes: a rotating body (41) disposed on a turntable (RP1) of a record player (RP) and configured to rotate with the turntable; a rotation detector (RD) detecting rotation of the rotating body; and a transmitting unit (47) transmitting rotation information that shows a rotation state of the rotating body detected by the rotation detector. The rotation detector includes a hall element (43) and a magnetic body (33). One of the hall element and the magnetic body is provided for the rotating body. The other of the hall element and the magnetic body is provided for the record player. The transmitting unit transmits the rotation information based on an electric signal output from the hall element.