Wireless Smart Device Propulsion for Motion Measurement
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Solution Overview
Problem
Current science education tools, such as wheeled carts, require external sensors for measuring dynamics, leading to accuracy issues and the inability to directly measure slope during motion, with no practical means to align carts physically for precise data collection.
Innovation Solution
Integration of wireless smart devices with internal sensors like MEMs accelerometers and gyroscopes, eliminating the need for external interfaces and allowing direct measurement of acceleration and slope, along with a propulsive force device using a motor and motor driver controlled by a processing unit for precise force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external position and force sensors are used to measure cart dynamics, then measurement capability is provided, but measurement precision deteriorates due to accuracy issues and inability to directly measure slope during motion
Solution Approach 1:
The patent combines multiple sensing capabilities (accelerometer, gyroscope, magnetometer) into a single integrated wireless smart device that attaches to the cart. This integration eliminates the need for separate external position and force sensors, while providing direct measurement of acceleration, slope, and magnetic field data with high precision.
Solution Approach 2:
The patent replaces mechanical alignment systems (grooved tracks) with electronic sensing and computational methods. The integrated sensors measure cart dynamics directly, and software algorithms calculate position and velocity from accelerometer data, eliminating the need for physical alignment infrastructure.
2Manufacturing precision
If a grooved track is used to ensure physical alignment of the cart with an external force sensor, then alignment precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical grooved track alignment system with electronic sensing and computational alignment. The integrated sensors on the wireless smart device measure cart orientation and position directly, and software algorithms compute the necessary alignment corrections, eliminating the need for physical track infrastructure.
Solution Approach 2:
The patent introduces a wireless communication intermediary that transmits sensor data between the cart-mounted device and the external computing system. This wireless link replaces the need for physical alignment infrastructure, allowing data transmission without mechanical connection or track requirements.
3Measurement precision
If cart acceleration is inferred by calculating the second derivative of position, then position measurement is maintained, but measurement precision deteriorates due to loss of accuracy
Solution Approach 1:
The patent inverts the traditional measurement approach by directly measuring acceleration using an integrated accelerometer sensor, rather than inferring it from position data. This direct measurement eliminates the accumulation of numerical differentiation errors that occur when calculating acceleration as the second derivative of position.
Solution Approach 2:
The wireless smart device performs self-measurement of acceleration, position, and slope using its integrated sensors. The device autonomously collects and transmits its own motion data without requiring external measurement infrastructure, ensuring high accuracy throughout the measurement process.
4Measurement precision
If no practical means exists to measure a slope of the cart in movement, then device simplicity is maintained, but measurement capability is lost
Solution Approach 1:
The patent combines a gyroscope with the accelerometer and magnetometer in a single integrated wireless smart device. The gyroscope directly measures cart slope and orientation during motion, providing this previously unavailable measurement capability while maintaining a compact, integrated design that does not significantly increase overall device complexity.
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 and synchronized measurement of motion, force, and slope with reduced costs by eliminating external sensors and interfaces, improving experimental data accuracy and reducing manual control errors.
Implementation Method 1
a motor to drive a rotating member to generate a propulsive force
Implementation Method 2
Integration of wireless smart devices with internal sensors like MEMs accelerometers
Implementation Method 3
internal sensors like MEMs accelerometers and gyroscopes, eliminating the need for external interfaces and allowing direct measurement of acceleration and slope
Data Source
AI summary
Described herein are propulsive force devices for providing propulsive force to integrated wireless devices for science education (e.g., Newton's laws of motion, kinematics, etc.). A propulsive force device includes a motor to drive a rotating member to generate a propulsive force and a motor driver coupled to the motor. The motor driver controls operation of the motor and at least one processing unit is coupled to the motor driver. The at least one processing unit is configured to receive a control signal from an integrated wireless device to adjust at least one parameter of the propulsive force device. When the propulsive force device is mounted to an integrated wireless device, operation of the propulsive force device may be configured to alter, adjust, or otherwise change dynamic properties of the integrated wireless device during science education experiments.