Virtual Drum Kit Using RF Motion Capture
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Solution Overview
Problem
Conventional drum kits are inaccessible to beginners due to their large size, high cost, and poor portability, while electronic and air drum alternatives either require physical drumheads or rely on smart devices with performance limitations, leading to delayed experiences.
Innovation Solution
A virtual drum kit device comprising a motion capture device with RF-capable drumsticks and a drum sound processing device connected via Bluetooth and USB MIDI, allowing independent operation without additional intelligent devices, enhancing portability and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a physical drumhead is reserved in electronic drum, then the drum can produce sound, but the device occupies large space and is difficult to carry
Solution Approach 1:
The patent extracts the physical drumhead from the system entirely, replacing it with wireless drumsticks that capture motion and transmit data digitally. This eliminates the need for large physical components while maintaining the core drumming function, directly resolving the contradiction between portability and sound production capability.
Solution Approach 2:
The patent replaces the mechanical drumhead system with an electronic motion capture and wireless transmission system. The drumsticks contain sensors that detect motion and transmit data wirelessly to a processing device, substituting mechanical sound production with electronic signal processing, thereby achieving compact size while maintaining functionality.
2Adaptability or versatility
If motion capture device is used in air drum, then physical drumhead is not needed, but the device cannot function independently and requires smart devices with software
Solution Approach 1:
The patent merges the motion capture functionality, processing unit, and sound output into a single integrated device. The processing unit is built into the drum sound processing device rather than requiring external smart devices, combining multiple functions that were previously separated and making the system self-sufficient.
Solution Approach 2:
The patent creates a universal device that can function independently without requiring specific smart devices or software installations. The integrated system handles motion capture, processing, and sound output universally, eliminating dependency on external devices with specific software requirements.
3Speed
If intelligent device is used to process motion data in air drum, then motion can be captured, but performance delays occur due to device limitations
Solution Approach 1:
The patent segments the processing function from external smart devices and places it directly in the drum sound processing device. This localizes the processing close to the motion capture point, reducing transmission and processing delays by eliminating intermediate steps and device handoffs.
Solution Approach 2:
The patent introduces a dedicated processing unit as an intermediary between motion capture and sound output. This specialized processor is optimized for real-time motion data handling, providing faster and more reliable processing compared to general-purpose smart devices, thereby reducing latency.
4Ease of operation
If drum kit is made accessible to beginners, then ease of use improves, but device complexity and cost increase
Solution Approach 1:
The patent uses inexpensive wireless drumsticks with simple motion capture sensors instead of complex electronic drum components. The drumsticks are designed as simple, affordable units that can be replaced if needed, making the overall system more accessible to beginners while reducing the need for expensive, complex equipment.
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 virtual drum kit improves portability, eliminates the need for additional devices, enables solo practice without disturbance, and provides seamless percussion and sound output through wireless connectivity and integrated MIDI interfaces.
Implementation Method 1
the first control PCBA board being connected to the battery and the vibration motor separately, and being capable of transmitting a radio frequency (RF) signal to the drum sound processing device
Implementation Method 2
a second micro control unit (MCU) controls the Bluetooth chip to provide a Bluetooth low energy musical instrument digital interface (BLE MIDI) and a universal serial bus musical instrument digital interface (USB MIDI), and transmits, through the BLE and USB interfaces, an MIDI encoded instruction of a drum kit to an external device capable of receiving the MIDI instruction
Data Source
AI summary
The present disclosure relates to a virtual drum kit device. The virtual drum kit device includes a motion capture device and a drum sound processing device separated from each other; where, the motion capture device includes at least two drumsticks, the drumstick including a first cover body, as well as a first battery, a first control printed circuit board assembly (PCBA) board and a vibration motor which are arranged in the first cover body, the first control PCBA board being connected to the battery and the vibration motor separately, and being capable of transmitting an RF signal to the drum sound processing device according to a motion instruction captured by the drumstick, the drum sound processing device includes a second cover body, as well as a second battery and a second control PCBA board which are arranged in the second cover body.