Keyboard Detection System Segmentation for Size Reduction
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Solution Overview
Problem
Existing techniques for detecting playing operations on keyboard instruments are limited by the size of the circuit board, as sensors and integrated circuits are typically disposed on a single board, restricting the ability to reduce the overall size.
Innovation Solution
A detection system for keyboard instruments is proposed, which includes a movable member with a detectable portion of a magnetic or conductive body, a detection board with a detection coil and circuit to generate a detection signal based on distance, a discrete control board with a control integrated circuit to process displacement data, and a transmitter to send detection signals from the detection board to the control board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sensors and integrated circuit are disposed on one circuit board, then the structure is simple and easy to manufacture, but the size of the circuit board cannot be reduced
Solution Approach 1:
The patent divides the detection system into separate functional modules: a detection board with sensors and a control board with integrated circuit. This segmentation allows each board to be optimized independently for its specific function, enabling the detection board to be smaller while maintaining manufacturing simplicity through modular assembly.
Solution Approach 2:
The patent transitions from a planar integration approach (all components on one board) to a three-dimensional modular architecture where detection and control functions are separated across different boards. This dimensional reorganization enables size reduction by allowing the detection board to focus only on sensor components without accommodating the integrated circuit.
2Volume of stationary object
If control IC is disposed close to detection coil, then the device size is reduced, but interference from control IC on magnetic field increases
Solution Approach 1:
The patent extracts the control IC from the detection board and places it on a separate control board. This extraction removes the source of magnetic field interference from proximity to the detection coil, eliminating harmful effects while allowing compact overall device design through modular integration.
Solution Approach 2:
The patent introduces a wireless transmission mechanism as an intermediary between the detection board and control board. This intermediary allows signal transmission without direct physical connection, enabling the control IC to be positioned remotely without interfering with the magnetic field while maintaining functional connectivity.
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 configuration allows for a reduction in the size of the detection system, improves the accuracy of displacement data generation by maintaining a secure distance between the detection coil and the control IC, and reduces interference from the control IC on the magnetic field.
Implementation Method 1
a detection coil disposed facing the detectable portion; and a detection circuit configured to generate a detection signal depending on a distance between the detection coil and the detectable portion
Data Source
AI summary
A detection system for a keyboard instrument includes a movable member that is displaceable in response to a user playing operation of the keyboard instrument. The detection system includes: (i) a detectable portion of a magnetic or conductive body that is disposed on the movable member; (ii) a detection board including: a detection coil disposed facing the detectable portion; and a detection circuit configured to generate a detection signal depending on a distance between the detection coil and the detectable portion; (iii) a control board, which is discrete from the detection board, including a control integrated circuit configured to generate, based on the detection signal, displacement data indicating a position of the movable member; and (iv) a transmitter configured to transmit the detection signal from the detection board to the control board.