Power Abnormality Detection Circuit for Peripheral Devices
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Solution Overview
Problem
Point of Sale (POS) systems face challenges in preventing power interruptions and damage to peripheral devices due to abnormalities in the power-supply process, as existing detection and protection circuits respond slowly, potentially causing electronic component damage and system failures.
Innovation Solution
A computer device with a microprocessor, voltage converter circuit, control circuit, and detection circuit that enables the supply of power to peripheral devices only when system power is normal, the voltage converter functions correctly, and no power abnormalities are detected, using enable signals to manage the power supply and warning devices to alert users of potential issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection and protection circuit is provided to prevent power interruptions and damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The power supply system is segmented into distinct functional modules: voltage converter circuit for voltage transformation, detection circuit for abnormality monitoring, control circuit for power supply management, and microprocessor for coordination. Each module operates independently with specific functions, allowing the complex power protection system to be divided into manageable segments that can be designed, tested, and maintained separately while working together to ensure overall system reliability
Solution Approach 2:
The detection circuit continuously monitors power parameters before abnormalities cause damage. The system performs preliminary detection of voltage levels, current flow, and potential faults, then activates protection mechanisms in advance. This preliminary action allows the system to prevent power interruptions and component damage before they occur, rather than reacting after failures happen
2Reliability
If the detection circuit monitors power abnormalities continuously, then reliability is improved, but use of energy increases
Solution Approach 1:
The detection circuit operates using periodic sampling of power parameters rather than continuous monitoring. The microprocessor and control circuit check voltage, current, and other power metrics at predetermined intervals, which maintains adequate detection accuracy while significantly reducing energy consumption compared to truly continuous monitoring. This periodic action is sufficient to detect abnormalities that develop over time without constantly drawing power
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 solution ensures reliable power supply to peripheral devices, preventing damage and system failures by ensuring power abnormalities are detected and addressed promptly, and dynamically adjusts current-overloading settings based on peripheral device operations, enhancing operational efficiency and safety.
Implementation Method 1
the voltage converter circuit is coupled to the microprocessor and is configured to convert a first voltage of a system power of the computer device into a second voltage
Data Source
AI summary
A computer device includes a microprocessor, a voltage converter circuit converting a first voltage of a system power into a second voltage, a control circuit controlling supply of the second voltage and a detection circuit detecting whether power abnormality at the peripheral device has occurred. When confirming that the system power is being supplied normally, the microprocessor generates a first enable signal to enable the voltage converter circuit. When confirming that the voltage converter circuit functions normally, the microprocessor generates a second enable signal to enable the detection circuit. The detection circuit generates a first detection signal according to detection result for the microprocessor to determine whether to supply the second voltage to the peripheral device. When the first detection signal indicates that power abnormality has not occurred, the microprocessor generates a third enable signal to enable the control circuit to supply the second voltage to the peripheral device.