Compact Disc Player Ejection Control Using Temperature Feedback
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Solution Overview
Problem
Compact disc players face issues with inconsistent ejection due to temperature variations, which affect friction levels between mechanical components, leading to incomplete ejection at cold temperatures and excessive ejection at hot temperatures.
Innovation Solution
A method and system that utilize a temperature sensor to generate a signal, which a controller uses to determine an ejection time interval for a motor drive mechanism, ensuring the compact disc is ejected to a predetermined position by adjusting the energization time based on temperature readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a predetermined amount of time that the motor is energized is used for ejection, then the ejection mechanism is simple to control, but at cold temperatures the compact disc may not protrude far enough from the face-plate
Solution Approach 1:
The patent applies dynamics by making the ejection time variable rather than fixed. The controller dynamically adjusts the motor energization time based on temperature sensor readings, extending the ejection time when temperatures are cold and reducing it when temperatures are hot, thereby maintaining reliable ejection across varying thermal conditions while keeping the control mechanism relatively simple.
Solution Approach 2:
The patent implements feedback by using a temperature sensor to continuously monitor the internal temperature of the compact disc player and providing this information to the controller. The controller then uses this feedback to adjust the motor energization time accordingly, ensuring proper ejection performance across different temperature conditions.
2Ease of operation
If a predetermined amount of time that the motor is energized is used for ejection, then the control mechanism is simple, but at hot temperatures the compact disc can protrude further than desired and fall away from the compact disc player
Solution Approach 1:
The system dynamically adjusts motor energization time based on real-time temperature feedback. When temperatures are hot, the controller reduces the energization time to prevent excessive ejection and disc falling away, while maintaining simple control architecture through the integrated sensor-controller-motor loop.
Solution Approach 2:
The temperature sensor provides continuous feedback to the controller about the internal temperature conditions, enabling the controller to modulate the motor energization time to achieve precise ejection control at hot temperatures and prevent disc malfunction.
3Reliability
If the ejection time is extended to ensure complete ejection at cold temperatures, then ejection reliability at cold temperatures improves, but the compact disc can protrude excessively at hot temperatures
Solution Approach 1:
The patent applies dynamics by implementing a variable ejection time that adapts to temperature conditions. The controller extends ejection time when cold temperatures are detected to ensure complete ejection, while reducing ejection time when hot temperatures are detected to prevent excessive protrusion and potential disc falling away.
Solution Approach 2:
The temperature sensor provides feedback that enables the controller to adjust ejection time in real-time. This feedback mechanism ensures that ejection reliability at cold temperatures is maintained while preventing the harmful effect of excessive ejection at hot temperatures through dynamic time adjustment.
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
The solution ensures consistent and proper ejection of compact discs across a range of temperatures, preventing incomplete or excessive ejection, thereby maintaining disc integrity and user accessibility.
Implementation Method 1
generating a signal indicative of a temperature of the compact disc player utilizing a temperature sensor
Implementation Method 2
energizing a motor coupled to a drive mechanism for a time internal corresponding to the ejection time interval value to induce the drive mechanism to move the compact disc
Implementation Method 3
temperature variations of the compact disc player can vary friction levels of mechanical components of the actuating device
Data Source
AI summary
A compact disc player and a method and an article of manufacture for controlling ejection of a compact disc are provided. The compact disc player includes a temperature sensor configured to generate a signal indicative of a temperature of the compact disc player utilizing a temperature sensor. The compact disc player further includes a controller operably communicating with the temperature sensor. The controller is configured to determine an ejection time interval value based on the signal. The controller is further configured to energize a motor coupled to a drive mechanism for a time internal corresponding to the ejection time interval value to induce the drive mechanism to move a compact disc to a predetermined position outwardly from a housing.