Load State Detection Using Parasitic Capacitance
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Solution Overview
Problem
Existing load state detection devices for electronic equipment are costly and occupy additional space, hindering miniaturization and integration due to the need for peripheral circuits and high hardware costs.
Innovation Solution
The device detects load state using parasitic capacitance, a pull-down resistor module, and a level detecting module within the main control unit, eliminating the need for additional peripheral circuits and clamp diodes, thereby reducing hardware costs and product volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional load state detection devices using DC reference power supply, sensors or amplifiers are used, then detection reliability is improved, but hardware cost and device complexity increase
Solution Approach 1:
The patent merges the load state detection function with the existing main control unit by utilizing its internal parasitic capacitance, pull-down resistor module, and level detecting module. This integration eliminates the need for separate detection devices, sensors, or amplifiers, thereby reducing hardware cost and device complexity while maintaining detection reliability through the coordinated operation of these internal components.
Solution Approach 2:
The main control unit performs self-detection of load state by utilizing its own internal resources (parasitic capacitance, pull-down resistor module, and level detecting module) without requiring external detection devices. This self-service approach reduces hardware requirements and simplifies the overall system while ensuring reliable detection through the unit's inherent capabilities.
2Reliability
If traditional load state detection devices are used, then detection function is achieved, but actual product volume increases
Solution Approach 1:
The detection function is merged into the main control unit's existing structure, utilizing its internal components rather than adding separate detection devices. This integration ensures that no additional peripheral circuits are required, thereby preventing any increase in actual product volume while fully achieving the load state detection function.
3Reliability
If additional peripheral circuits are added for load state detection, then detection capability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The main control unit utilizes its own internal components (parasitic capacitance, pull-down resistor module, and level detecting module) to perform load state detection, eliminating the need for additional peripheral circuits. This self-service approach simplifies the manufacturing process by reducing the number of components that need to be assembled and tested, thereby improving ease of manufacture while maintaining full detection capability.
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 allows for effective load state detection without increasing product volume or hardware costs, while providing a clamping effect on the input/output interface, thus enhancing detection accuracy and reducing component requirements.
Implementation Method 1
A parasitic capacitance is generated in the circuit between the input/output interface and the common end of the first resistor and the second resistor
Implementation Method 2
The pull-down resistance module is in parallel with the second resistor to divide the voltage
Data Source
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AI summary
The invention discloses a device for detecting load state of driving power supply, the present invention can detect the load state of the driving power supply by using the parasitic capacitance, the pull-down resistor module inside the main control unit and the level detecting module in the circuit, without adding peripheral circuit. In this way, the actual product volume of the present invention does not increase, nor does it need to increase the hardware cost.