Capacitance Detection Using Terminal Voltage Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Accurately detecting the capacitance of a capacitor used as a backup power supply in electronic devices is challenging due to the intermittent charging control and unstable terminal voltage, making it difficult to utilize transient response characteristics effectively.
Innovation Solution
An electronic device configuration that includes a capacitor, a power supply device, a discharger, and a capacitance detector, where the capacitance detector maintains a terminal voltage at a given level for a predetermined time before discharging the capacitor, allowing for accurate capacitance detection based on transient response characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intermittent charging control is applied to prevent overcharging, then capacitor degradation is prevented, but terminal voltage becomes unstable and capacitance detection accuracy deteriorates
Solution Approach 1:
The system performs preliminary stabilization by maintaining the terminal voltage at a predetermined level for a specified period before capacitance detection. This preliminary action ensures the capacitor reaches a stable state, allowing accurate capacitance measurement while preserving the intermittent charging control benefits.
Solution Approach 2:
The voltage stabilization mechanism acts as an intermediary between the intermittent charging control and capacitance detection. By introducing this intermediate stabilization step, the system bridges the gap between unstable voltage conditions and the requirement for stable voltage during measurement.
2Loss of time
If capacitance detection is performed immediately after charging, then detection time is reduced, but detection accuracy deteriorates due to unstable terminal voltage
Solution Approach 1:
The system implements a preliminary voltage stabilization period immediately after charging before proceeding with capacitance detection. This ensures that the terminal voltage reaches a stable state, providing accurate detection results without requiring excessive waiting time.
Solution Approach 2:
The system dynamically adjusts the detection timing based on the stabilization period requirement. By making the detection process adaptive to the voltage stabilization state, the system optimizes both the speed and accuracy of capacitance detection.
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
This approach increases the accuracy of capacitance detection by stabilizing the terminal voltage, enhancing the reliability of predicting capacitor degradation and prolonging its lifespan, with improved detection accuracy and extended operational time before determining the capacitor has reached the end of its life.
Implementation Method 1
a capacitance detector to maintain a terminal voltage of the capacitor at a predetermined level for a predetermined period, by controlling an operation time of the power supply device
Implementation Method 2
detect a capacitance of the capacitor based on a transient response characteristic of the discharge
Data Source
AI summary
According to one embodiment, an electronic device includes a capacitor, a power supply device, a discharger and a capacitance detector. The capacitor is used as a backup power supply. The power supply device charges the capacitor. The discharger discharges the capacitor. The capacitance detector maintains a terminal voltage of the capacitor at a given level for a predetermined time, by controlling an operating time of the power supply device. The capacitance detector allows the discharger to start the discharge the predetermined time later. The capacitance detector detects a capacitance of the capacitor based on a transient response characteristic of the discharge.