Rotatable Display Motor Collision Stop via Acceleration Feedback
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Solution Overview
Problem
Rotatable display apparatuses pose a risk of collision with persons or objects during rotation, potentially causing injury or damage, as they continue to rotate after collision, leading to unintended consequences.
Innovation Solution
Incorporating a sensor and processor system that detects acceleration and angular velocity to identify collisions and control the motor to stop the display's rotation, using a low-pass filter to differentiate between relevant and irrelevant signals, and displaying user interfaces for restoring the display to its original state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display continues to rotate after collision, then the rotation function is maintained, but user safety and device integrity deteriorate
Solution Approach 1:
The system uses acceleration sensors to detect collision feedback in real-time during rotation. When the sensor detects acceleration exceeding a threshold, the processor receives this feedback signal and automatically stops the motor, preventing further rotation after collision and ensuring user safety.
Solution Approach 2:
The system performs preliminary collision detection before serious damage can occur. By continuously monitoring acceleration during rotation and stopping the motor when collision is detected, the system prevents potential injuries and device breakage before they can fully manifest.
2Measurement precision
If acceleration threshold is set low, then collision detection sensitivity is improved, but false detection from normal rotation increases
Solution Approach 1:
The system dynamically adjusts the acceleration threshold based on the current rotation state. During normal rotation, the threshold is set higher to avoid false detection. When rotation stops or slows down, the threshold becomes more sensitive to detect actual collisions, thus balancing detection sensitivity with false detection prevention.
Solution Approach 2:
The processor changes the acceleration threshold parameter according to the operational phase. During active rotation, a higher threshold is used to tolerate normal vibrational accelerations. After rotation stops or when collision is suspected, the threshold is lowered to detect even minor collisions accurately.
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
Prevents injuries and damage by ensuring the display apparatus stops rotating upon collision, thereby maintaining user safety and preventing potential breakage.
Implementation Method 1
a sensor 130, and a processor 140 configured to receive a signal including information on acceleration of the display apparatus from the sensor 130
Implementation Method 2
the processor may generate a signal corresponding to the size of the acceleration of the display apparatus based on the information on the acceleration received from the sensor, filter the signal through a low pass filter
Implementation Method 3
a motor 120 configured to rotate the display 110
Data Source
AI summary
A display apparatus and a control method thereof are provided. The display apparatus includes a display, a motor, a sensor, and a processor configured to receive a signal including information on acceleration of the display apparatus from the sensor while the display is rotated by the motor, identify the size of the acceleration of the display apparatus based on the information on the acceleration, and based on identifying that the display collided with an object based on the size of the acceleration of the display apparatus, control the motor to stop the rotation of the display.