High-Voltage Plug Monitoring With Signal Feedback Verification
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Solution Overview
Problem
Conventional electrical monitoring devices for high-voltage applications in motor vehicles can malfunction due to faults in electrical wiring, leading to incorrect determination of plug insertion status and potential exposure to electrical voltages.
Innovation Solution
An additional electrical connection is incorporated into the monitoring device to allow the microcontroller to verify the integrity of the signal path and check for malfunctions, using a comparison of electrical signal sequences to ensure accurate plug detection and prevent erroneous deactivation of the high-voltage source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the monitoring device transmits electrical signal sequences through the high-voltage connection unit to detect plug status, then connection status can be monitored, but wiring faults may cause erroneous deactivation of the high-voltage source
Solution Approach 1:
The microcontroller transmits an electrical signal sequence through the high-voltage connection unit and evaluates the returned signal to verify connection integrity. This feedback loop ensures that the system only deactivates the high-voltage source when truly necessary, preventing erroneous deactivation caused by wiring faults while maintaining automatic monitoring functionality.
Solution Approach 2:
The system performs preliminary verification of the electrical connection integrity by transmitting and evaluating the signal sequence before making decisions about high-voltage source activation or deactivation. This preliminary action ensures that the monitoring system is functioning correctly before critical operations are performed.
Data Source
AI summary
An electrical monitoring device for a high-voltage electrical power supply may include a high-voltage electrical connection unit, a microcontroller, and an electrical connection. The electrical connection unit may include a plug, a plug receptacle, a high-voltage connection electrically connectable to a voltage source, an electrical signal input connection, and an electrical signal output connection. The electrical signal input connection and the electrical signal output connection may be electrically connected when the plug is accommodated in the plug receptacle, and may be electrically separated when the plug is not accommodated in the plug receptacle. The microcontroller may include (i) an electrical signal output electrically connected via a first signal processing unit to the electrical signal input connection and (ii) a signal input electrically connected to the electrical signal output connection. An electrical signal sequence provided at the electrical signal input connection may be transmittable to the microcontroller via the electrical connection.