Displacement Detection in Electronic Wind Instruments
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Solution Overview
Problem
Existing electronic wind instruments face challenges in accurately detecting the rotation of a transmission member due to potential contact with sensors, dimensional errors during assembly, and changes in elastic force affecting detection sensitivity.
Innovation Solution
An electronic wind instrument incorporating a displacement amount detecting apparatus with a transmission member, sensor, calculation device, and correction device, where the sensor measures distance changes and the calculation device calculates and corrects reference values to ensure accurate detection of rotation, minimizing contact risks and dimensional errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between the transmission member and sensor is set to be relatively large to prevent contact, then the risk of contact is reduced, but the detection sensitivity decreases
Solution Approach 1:
The patent applies preliminary action by setting the initial distance between the transmission member and sensor to a predetermined value before operation begins. This pre-established distance ensures that the transmission member does not contact the sensor during normal operation while maintaining optimal detection sensitivity. The system proactively prevents contact through this initial positioning rather than reacting to contact risks during operation.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the distance parameter between the transmission member and sensor based on operational conditions. The system changes the distance parameter to balance two competing requirements: maintaining sufficient separation to prevent contact while keeping the distance small enough to ensure high detection sensitivity. This parameter adjustment resolves the contradiction between reliability and measurement precision.
2Ease of manufacture
If the elastic member is deformed during assembly, then the mouthpiece can be fitted into the core, but the elastic force applied to the transmission member changes
Solution Approach 1:
The patent applies preliminary action by pre-setting the elastic force parameter of the elastic member during the design and manufacturing phase. The elastic force is calibrated to a predetermined value that ensures proper functioning while maintaining consistency across production batches. This preliminary calibration prevents variations in elastic force that would arise from deformation during assembly, thereby maintaining manufacturing precision.
Solution Approach 2:
The patent implements feedback by incorporating a sensor that detects the position and force parameters of the transmission member in real-time. The system monitors the actual elastic force applied and provides feedback to adjust or compensate for any deviations. This feedback mechanism ensures that even if the elastic member experiences minor deformations during assembly, the overall system maintains consistent and accurate performance.
3Ease of manufacture
If dimensional errors occur during assembly, then the parts can be assembled, but the detection accuracy of the transmission member rotation decreases
Solution Approach 1:
The patent implements feedback by using the sensor to detect the actual position and distance parameters of the transmission member during operation. The system monitors real-time data and provides feedback to compensate for dimensional errors that occurred during assembly. This feedback mechanism allows the system to adapt to assembly variations and maintain accurate rotation detection despite manufacturing tolerances.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting detection parameters based on actual measured values during operation. The system changes its operational parameters to account for dimensional errors introduced during assembly, thereby maintaining detection accuracy. This adaptive parameter adjustment resolves the contradiction between ease of manufacture and measurement precision.
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 solution enables precise detection of transmission member rotation, enhancing detection sensitivity and reducing errors, while maintaining the instrument's structural integrity and operational reliability.
Implementation Method 1
a Hall element (sensor) is disposed to face a magnet fixed to the other end of the cantilever. According to the electronic wind instrument, the transmission member rotates when the reed is bitten, a distance between the magnet and the Hall element changes, and thus an amount of biting on the reed can be detected according to the change in the distance (magnetic field).
Data Source
AI summary
A displacement amount detecting apparatus is provided and includes: transmission member, transmitting a displacement on one end side thereof to a displacement on the other end side thereof; a sensor, disposed to face the other end side of the transmission member, and configured to output a value according to a distance between the sensor and the other end side of the transmission member; a calculation device, calculating a value for indicating the distance based on the value output by the sensor and a reference value; and a correction device, correcting the reference value. When the one end side is displaced in a first direction, the other end side is displaced in a second direction opposite to the first direction and away from the sensor. The correction device is configured to correct the reference value based on the value for indicating the distance calculated by the calculation device.