Mobile Device Agitation Command Recognition via IMU Signal Filtering
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Solution Overview
Problem
Users face difficulties in inputting commands to mobile device service applications, such as those for streaming media, while on the move, as they need to physically interact with the device, which can be inconvenient during activities like running or driving.
Innovation Solution
The method employs an inertial measurement unit (IMU) to detect and filter agitation patterns, such as tapping or shaking, to associate specific movements with commands, allowing users to control service applications without direct interface interaction by training the device to recognize distinct agitation patterns as command inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users interact with the device through traditional interfaces (buttons, touchscreen, microphone), then commands can be input accurately, but it becomes difficult and inconvenient when users are on the move (running, driving)
Solution Approach 1:
The patent replaces traditional mechanical and manual interfaces (buttons, touchscreen, microphone) with an inertial sensor-based system that detects physical agitation patterns. The IMU captures movement data, and signal processing algorithms transform these mechanical movements into digital commands, eliminating the need for manual interface interaction while maintaining accurate command input capability.
2Reliability
If the system uses raw IMU data without filtering, then all movement signals are captured, but noise and background signals interfere with accurate command detection
Solution Approach 1:
The patent extracts useful command signals from the raw IMU data stream by applying filtering operations that remove noise and background movements. The signal processing pipeline selectively extracts agitation patterns that match predefined command patterns while discarding irrelevant movements, thereby improving detection accuracy without requiring overly complex processing.
3Speed
If the system continuously monitors IMU data, then commands can be detected in real-time, but energy consumption increases
Solution Approach 1:
The patent implements periodic sampling of IMU data rather than continuous monitoring. The system activates the IMU and processes data only during predetermined time intervals when command input is expected, reducing energy consumption while maintaining real-time responsiveness for command 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
Enables users to control service applications, like streaming media, through intuitive agitation gestures, enhancing convenience and usability by allowing command inputs without needing to physically interact with the device, thus simplifying the control of services on the go.
Implementation Method 1
The mobile device comprises an inertial measurement unit (IMU). The method comprises determining a time interval in which a user of the mobile device will agitate (e.g., tap, shake, rotate or otherwise move) the mobile device
Data Source
AI summary
The present disclosure relates to a method performed by a mobile device for facilitating inputting a command to a service application in the mobile device. The mobile device comprises an inertial measurement unit (IMU). The method comprises determining a time interval in which a user of the mobile device will agitate the mobile device in accordance with a command. The method also comprises filtering an information feed from the IMU during said time interval to remove signals which are outside of a predetermined spectrum and thus regarded as noise. The method comprises finding distinguishable signals within the filtered feed, said distinguishable signals forming a command pattern. The method comprises associating the command pattern with the command.