Protection Device Clock-Synchronized Temperature Detection
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Solution Overview
Problem
Conventional protection devices for electronic apparatuses increase electric power consumption by continuously monitoring temperatures and currents at multiple locations, which is inefficient as the devices become more multifunctional and power-intensive.
Innovation Solution
A protection device that performs detection operations synchronously with a clock signal turned ON/OFF in a predetermined cycle, using a detection element, oscillating circuit, and detection circuit to shut off power supply only during the ON time, reducing power consumption even with multiple monitoring points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature and current are monitored continuously at multiple locations, then detection reliability is improved, but electric power consumption increases
Solution Approach 1:
The patent implements periodic detection by controlling the detection circuit to operate only during specific time intervals defined by a clock signal. The detection is performed in synchronization with the clock signal's ON/OFF cycles, allowing the system to monitor temperatures and currents at multiple locations reliably while consuming power only during detection intervals rather than continuously.
2Measurement precision
If multiple detection circuits are provided for multifunctional electronic apparatus, then detection precision is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple detection functions into a single detection circuit that can measure temperatures and currents at multiple locations sequentially. By using one detection circuit to perform multiple detection tasks during different time intervals synchronized with the clock signal, the system achieves comprehensive monitoring capability without the complexity of having separate dedicated circuits for each monitoring point.
Data Source
AI summary
A protection device detects a temperature in a predetermined monitoring place in an electronic apparatus 3 to protect the electronic apparatus 3, and includes an oscillating circuit 20 for generating a clock signal Vck having a predetermined cycle and a predetermined ON time, and a temperature detection circuit 16 for detecting the temperature in the monitoring place during the ON time of the clock signal Vck. The protection device shuts off supply of electric power to the electronic apparatus 3, when the temperature in the monitoring place exceeds a predetermined temperature.