Optocoupler Secure Command Dispatch Device
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Solution Overview
Problem
Existing secure command devices for transportation systems are bulky and energy-intensive, failing to provide a compact solution for securely dispatching command signals and verifying their states in the event of component failures.
Innovation Solution
A compact secure verification device using an optocoupler to dispatch a monitoring signal on power conductors, with a transistor and diodes to enable or disable the signal copying based on the command state, ensuring secure operation by reversing biasing the monitoring diode and using capacitors and resistors to manage potential differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transformer with four windings is used to transmit power command and verify state securely, then security monitoring is achieved, but the device becomes bulky and energy consumption increases
Solution Approach 1:
The patent replaces the electromagnetic transformer-based monitoring system with an optocoupler-based system. The optocoupler uses optical coupling instead of electromagnetic induction, achieving secure state verification with significantly reduced energy consumption and smaller size while maintaining the security monitoring function.
Solution Approach 2:
The invention uses an optocoupler to create an optical copy of the verification signal from the power conductor. This copying mechanism allows secure monitoring without the need for complex electromagnetic coupling, reducing both size and energy consumption while maintaining reliability.
2Reliability
If a transformer with four windings is used to transmit power command and verify state securely, then security monitoring is achieved, but the device size increases
Solution Approach 1:
The patent replaces the bulky electromagnetic transformer structure with a compact optocoupler device. The optocoupler achieves the same security monitoring function through optical coupling, dramatically reducing the device volume while maintaining reliable state verification.
Solution Approach 2:
The optocoupler creates an optical replica of the verification signal, enabling secure monitoring with minimal physical footprint. This copying approach eliminates the need for large transformer windings and magnetic cores, achieving compact device design.
3Reliability
If the monitoring diode is forward biased to allow signal copying, then verification is enabled, but unintended relay triggering may occur
Solution Approach 1:
The patent inverts the biasing approach by using reverse biasing of the monitoring diode during normal operation. This prevents the diode from conducting and triggering relays unintentionally, while still allowing verification through optical coupling when needed, thus eliminating the harmful effect.
Solution Approach 2:
The optocoupler acts as an intermediary between the power conductor and the verification circuit. It allows signal copying without direct electrical connection, preventing unintended relay triggering while maintaining verification capability through optical isolation.
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
The solution provides a compact, energy-efficient means to verify and dispatch secure command signals, ensuring all outputs are in a secure state in case of malfunction, reducing energy consumption and preventing unintended triggering of relays.
Implementation Method 1
At least one optical coupler has an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state
Data Source
AI summary
The invention aims to provide a compact device for despatching a command. For this purpose, the invention proposes a novel type of output stage. A secure verification device of the despatching of a binary command signal from at least one conductor has an input terminal and an output terminal. Means of insertion despatch a verification message on said conductor. At least one optical coupler has an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.