Tri-Axial Accelerometer Orientation Identification via Pre-Marked Indicia
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Solution Overview
Problem
Tri-axial accelerometers face challenges in accurately identifying their orientation relative to a device due to the indistinguishability of gravity and acceleration effects, leading to potential inaccuracies in measuring vertical and horizontal accelerations.
Innovation Solution
Incorporating indicia on the tri-axial accelerometer, such as sequences of identifiers (A, R, T) and schematics, to map orthogonal axes to directional axes, allowing for correct placement and orientation identification on a device, thereby enabling accurate measurement of acceleration vectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a tri-axial accelerometer is mounted on a device with multiple orientation options, then the accelerometer can measure acceleration in three-dimensional space, but the potential for inaccurately identifying the orientation of the accelerometer increases
Solution Approach 1:
The patent applies preliminary action by pre-marking the accelerometer housing with indicia (arrows, labels, or color codes) that correspond to specific acceleration axes (axial, radial, tangential). These markings are applied during manufacturing before the accelerometer is installed on the device. This allows the installer to quickly and accurately identify the correct orientation without requiring complex alignment procedures or calculations during installation, thus resolving the contradiction between multiple mounting options and orientation identification accuracy.
2Device complexity
If the tri-axial accelerometer measures acceleration without orientation identification, then the device complexity is reduced, but the measurement accuracy of vertical and horizontal accelerations deteriorates
Solution Approach 1:
The patent applies self-service by making the accelerometer housing itself carry the orientation information through indicia markings. The markings are directly on the accelerometer or its mounting bracket, serving as a self-identifying system. This eliminates the need for external orientation identification systems, complex software algorithms, or additional sensors to determine accelerometer orientation. The system is simple (low complexity) yet effective (high accuracy) because the accelerometer self-identifies its orientation through the pre-applied markings.
Data Source
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AI summary
A system and method for analyzing a device that includes a mass configured for motion. The system includes a tri-axial accelerometer disposed to detect acceleration vectors of the device and to output three channels of acceleration data, and a user interface receiving the three channels of acceleration data. The user interface is configured to correlate the three channels of acceleration data with a reference frame defined by three orthogonal axes intersecting at a vertex, and includes a display and a selector. The display shows sets of options that represent dispositions of the device with respect to gravity, placements of the tri- axial accelerometer with respect to the device, and orientations of the tri-axial accelerometer with respect to the device. The selector selects one device disposition option, one tri-axial accelerometer placement option, and one tri-axial accelerometer orientation option.