IMU Body Orientation Control for Precise Proportional Device Command
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Solution Overview
Problem
Existing control systems for robotic and mechanical devices lack efficient and accurate processing of user signals for smooth directional and proportional control, particularly in applications requiring precise orientation control.
Innovation Solution
A control apparatus comprising a sensor module with an inertial measurement unit (IMU) worn by the user, which detects body input and transmits orientation data wirelessly to a device module, allowing for real-time control of associated devices, such as prosthetic limbs, through orientation signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional control systems are used for robotic and mechanical devices, then the system structure is simple, but the processing accuracy of user signals is insufficient and smooth directional control is difficult to achieve
Solution Approach 1:
The patent replaces traditional mechanical control systems with an inertial measurement unit (IMU) based sensing system. The IMU detects body orientation and movement through inertial sensors (accelerometers, gyroscopes), translating physical body inputs into digital orientation signals that provide precise directional control without complex mechanical linkages.
Solution Approach 2:
The system changes the control parameter from simple button presses or mechanical levers to three-dimensional body orientation parameters. By detecting orientation in multiple axes (pitch, roll, yaw) through the IMU, the system achieves smooth proportional control where the degree of body tilt directly corresponds to control intensity, enabling nuanced directional commands.
2Measurement precision
If an inertial measurement unit is worn on the body to detect orientation, then precise directional control is achieved, but the weight and size of the sensor module increases
Solution Approach 1:
The IMU sensor module is designed to perform multiple functions: detecting body orientation, calculating movement direction, determining tilt angle, and generating control signals. This multi-functionality consolidates what would otherwise require separate sensors and processing units, reducing overall system weight and complexity while maintaining precise orientation detection capability.
3Productivity
If the sensor module processes complex orientation data in real-time, then smooth proportional control is achieved, but the power consumption increases
Solution Approach 1:
The system performs preliminary calculations by pre-defining the relationship between body orientation and control commands. The IMU continuously monitors orientation parameters, and when threshold changes are detected, control signals are immediately generated without requiring complex real-time computation, thereby reducing power consumption while maintaining responsive control.
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 precise and proportional control of devices by translating user body inputs into orientation commands, providing effective directional control and reducing the complexity and power requirements of the sensor module, while maintaining a compact and lightweight design.
Implementation Method 1
The at least one sensor module has an inertial measurement unit and is adapted to be worn by a user on at least one body part with the inertial measurement unit detecting body input
Data Source
AI summary
A system for control of a device includes at least one sensor module detecting orientation of a user's body part. The at least one sensor module is in communication with a device module configured to command an associated device. The at least one sensor module detects orientation of the body part. The at least one sensor module sends output signals related to orientation of the user's body part to the device module and the device module controls the associated device based on the signals from the at least one sensor module.