Self-Locking Detection Circuit for False Trigger Prevention
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Solution Overview
Problem
Existing self-locking circuits are prone to accidental triggering during power-on or MCU initialization, cannot be unlocked in a power-on mode, and lack real-time self-locked state detection and control capabilities.
Innovation Solution
A self-locking detection circuit and apparatus that includes a three-terminal transistor group, a power-on delay circuit, an anti-reverse diode, and a fault alarm system, allowing for real-time detection and control of the self-locked state, with a method to prevent false triggering and enable closed-loop control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional self-locking circuit is used, then the circuit can maintain continuous energization after being triggered, but it cannot be unlocked without cutting off power and may be accidentally triggered during power-on or initialization
Solution Approach 1:
The patent introduces a detection circuit as an intermediary between the self-locking circuit and the control system. This detection circuit monitors the self-locked state and provides feedback signals, enabling the control system to determine when unlocking is needed and execute controlled unlocking operations without requiring complete power cutoff.
Solution Approach 2:
The patent implements a feedback mechanism where the detection circuit continuously monitors the self-locking circuit's state and feeds this information back to the control system. This allows the system to detect the self-locked state in real-time and execute appropriate control actions, including controlled unlocking during power-on mode, thereby resolving the contradiction between maintaining stable locking and enabling operational unlocking.
2Device complexity
If a traditional self-locking circuit is used, then the circuit structure is simple, but it cannot detect or control the self-locked state in real-time
Solution Approach 1:
The detection circuit serves as an intermediary that bridges the self-locking circuit and the control system. It extracts and transmits state information from the self-locking circuit without significantly complicating the overall structure, enabling real-time monitoring while maintaining relative simplicity.
Solution Approach 2:
The detection circuit is designed to automatically monitor and detect the self-locked state without requiring external intervention or complex control mechanisms. It self-services by continuously checking the circuit state and providing feedback information, thus adding monitoring capability with minimal increase in system complexity.
3Device complexity
If a traditional self-locking circuit is used, then the circuit can operate without additional components, but it may be accidentally triggered during power-on or MCU initialization
Solution Approach 1:
The detection circuit performs preliminary detection of the self-locking circuit's state during power-on and initialization phases. By monitoring the circuit state before actual operation begins, it can identify and prevent accidental triggering during these critical phases, thereby improving reliability without requiring additional complex components.
Solution Approach 2:
The feedback mechanism provided by the detection circuit enables the control system to distinguish between intentional triggering and accidental triggering during power-on or initialization. The real-time state information allows the system to implement conditional logic that prevents false activation while maintaining normal self-locking functionality.
Data Source
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AI summary
Disclosed are a self-locking detection circuit and apparatus, and a control method. The self-locking detection circuit includes a self-locking circuit and a detection circuit. The self-locking circuit includes a three-terminal transistor group and a first input end, the three-terminal transistor group including a first transistor and a second transistor. The detection circuit includes a pull-up resistor, a bleeder resistor, and a third transistor, a first end of the pull-up resistor being provided with a first terminal for signal output, and a third end of the third transistor being provided with a second terminal for signal output. The first input end is provided between a first end of the third transistor and the first terminal, and the first input end is configured to receive a level signal output from a controller. The self-locking detection circuit and apparatus, and the control method according to the present application are resistant to interference, and have high reliability and safety. Level signals at the first terminal and the second terminal are detected after a low-level signal is input to the first input end, such that a self-locked state of the self-locking circuit can be checked in real time, and the self-locking circuit can be controlled to unlock the self-locked state in a power-on mode.