Movable Display Unit Motor Current Collision Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display units in changeable positions, such as those in aircraft cabins, face issues with accidental collisions, leading to potential damage and faulty operations due to the lack of effective impact reduction mechanisms.
Innovation Solution
A display unit with a movable display, a motor for rotational movement, a driving state detector, a current detector, and a controller that adjusts motor drive control based on detected current thresholds to manage accidental collisions by determining the direction and magnitude of external forces applied during open and close operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display is made movable between positions, then the adaptability and ease of operation are improved, but the reliability deteriorates due to vulnerability to accidental collisions
Solution Approach 1:
The system performs preliminary detection of collision states through current monitoring before damage occurs. The controller continuously monitors motor current during movement operations, and when abnormal current indicating a collision is detected, the system proactively stops the motor to prevent further damage, rather than waiting for actual damage to occur.
Solution Approach 2:
The system implements feedback control by continuously monitoring motor current during display movement and comparing it against predetermined thresholds. Based on this feedback, the controller automatically adjusts operation - either stopping the motor when collision is detected or allowing normal operation when current is within acceptable ranges, thus dynamically maintaining reliability while preserving position changeability.
2Reliability
If the motor is continuously monitored to detect collisions, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The system uses the motor's own operating parameters (current) as the detection mechanism, eliminating the need for separate collision sensors or complex detection hardware. The motor essentially monitors its own state through current feedback, and the controller uses this self-provided information to detect collisions and initiate protective actions.
Solution Approach 2:
The system detects collisions by monitoring changes in motor current parameters during operation. Instead of using complex mechanical or optical sensors, the invention transforms the collision detection function into an electrical parameter monitoring task, where abnormal current variations indicate collision events, simplifying the overall system architecture.
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
Effectively reduces the impact of accidental collisions by controlling the display's movement to mitigate external forces, ensuring the unit's stability and preventing faulty operations.
Implementation Method 1
a current detector for detecting motor current
Data Source
AI summary
The display unit of the present disclosure has a main unit, a display disposed on the main unit so as to be movable between a first position and a second position, a motor for driving the display, a driving state detector for detecting the driving state of the motor, a current detector for detecting motor current, and a controller for controlling the driving state of the motor. When the current detector detects a predetermined current value suitable for the driving state detected by the driving state detector, the controller provides the motor with a predetermined drive control.