Three-Axis MEMS Accelerometer Tilt Control
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Solution Overview
Problem
Conventional accelerometers are limited in detecting non-linear movements, rotations, and angular displacements, as they can only measure linear acceleration along specific axes, making it difficult to control the attitude and path of objects in virtual environments with precision.
Innovation Solution
A hand-held controller equipped with a three-axis linear acceleration sensor, which uses MEMS technology to detect linear acceleration in three directions (up/down, left/right, and forward/backward), allowing for the inference of tilt, attitude, and position through additional signal processing, enabling precise control of objects in virtual environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional accelerometers are used to detect linear acceleration, then the device can measure acceleration along specific axes, but it cannot detect non-linear movements, rotations, and angular displacements
Solution Approach 1:
The patent combines multiple accelerometers arranged in specific configurations to create a system that can detect both linear acceleration and rotational movements. By merging the output signals from multiple accelerometers and processing them through signal processing circuits, the system achieves the ability to detect non-linear movements, rotations, and angular displacements while maintaining accurate linear acceleration measurement.
Solution Approach 2:
The patent introduces signal processing circuits as intermediaries between the accelerometers and the control system. These circuits process the raw acceleration signals to extract information about linear acceleration, rotational movements, and angular displacements. The signal processing acts as a mediator that transforms the limited capabilities of individual accelerometers into comprehensive movement detection capabilities.
2Measurement precision
If a three-axis linear acceleration sensor is used to detect linear acceleration in three directions, then the controller can infer tilt and attitude, but the device complexity increases
Solution Approach 1:
The patent designs the three-axis linear acceleration sensor system to serve multiple functions: detecting linear acceleration in three directions, inferring tilt angles, determining attitude orientation, and enabling control of object paths in virtual environments. By making the sensor system multi-functional, the patent justifies the increased device complexity through the gain in measurement precision and control capability across multiple domains.
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 accurate control of object paths and attitudes in virtual environments by processing linear acceleration signals, allowing users to simulate steering and other control inputs, even in mid-air, enhancing gaming and simulation experiences.
Implementation Method 1
Such an acceleration sensor is an electrostatic capacitance or capacitance-coupling type that is based on silicon micro-machined MEMS (micro-electromechanical systems) technology
Implementation Method 2
Such an acceleration sensor is an electrostatic capacitance or capacitance-coupling type that is based on silicon micro-machined MEMS (micro-electromechanical systems) technology
Data Source
AI summary
A handheld controller includes a three-axis, linear acceleration sensor that can detect linear acceleration in three directions, i.e., the up/down direction (Y-axis), the left/right direction (Z-axis), and the forward/backward direction (X-axis). A programmed object adjustment process adjusts a falling object to decrease the velocity v at which the object is moving in response to detected tilt changes in a first direction, and to increase the velocity v at which the object is moving in response to detected tilt changes in a second direction different from the first direction.