Detector Removal Fault Detection Circuit Using Discharge Loops
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Solution Overview
Problem
Existing area monitoring modules struggle to accurately identify detector removal faults, particularly in models using 'diode base+active terminal product', which are complex and limited in detector support, and fail to distinguish between detector removal faults and open circuit faults.
Innovation Solution
A detection circuit is integrated into an area monitoring module with a 'diode base+terminal resistor' working model, utilizing a switching circuit, energy storage element, and control circuit to differentiate between detector removal and non-removal scenarios by generating distinct discharge loops based on output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the area monitoring module uses the 'standard base+terminal resistor' working model, then the circuit structure is simple, but the detector removal fault cannot be accurately identified and other detectors are affected
Solution Approach 1:
The patent segments the fault detection function by introducing a separate detection circuit with switching elements that can independently test each diode base segment. This allows individual detector removal faults to be identified without affecting other segments, resolving the contradiction between simple structure and accurate fault identification.
Solution Approach 2:
The patent introduces a detection circuit as an intermediary component between the terminal resistor and diode bases. This intermediary contains switching elements and energy storage elements that enable accurate fault detection while maintaining the overall simplicity of the original working model.
2Reliability
If the area monitoring module uses the 'diode base+active terminal product' working model, then the detector removal fault does not affect other detectors, but the circuit structure becomes complicated and the number of supported detectors is limited
Solution Approach 1:
The patent introduces dynamic switching elements that can change the circuit configuration based on detection needs. The switching circuit dynamically connects or disconnects different diode bases during the detection process, enabling accurate fault identification without requiring a completely reconfigured circuit for each detector.
Solution Approach 2:
The detection circuit performs periodic detection cycles where switching elements sequentially test each diode base. This periodic action allows the system to maintain simplicity while achieving reliable fault detection by cycling through detection states rather than maintaining complex permanent connections.
3Reliability
If the area monitoring module uses the 'diode base+active terminal product' working model, then detector removal fault isolation is improved, but the fault type cannot be distinguished between removal and open circuit
Solution Approach 1:
The patent applies local quality by making each diode base detectable individually through the switching circuit. Each segment can be tested with specific switching configurations, allowing the system to not only isolate faults but also determine their specific type (removal vs. open circuit) based on the local detection results.
Solution Approach 2:
The detection circuit incorporates feedback mechanisms where the control circuit monitors the state of each diode base during detection and uses this information to determine fault types. The feedback from each switching element's state provides information about whether a detector is removed or has an open circuit fault.
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 accurately identifies detector removal faults, simplifies circuit design and installation, and supports a larger number of detectors without relying on active terminal products.
Implementation Method 1
an energy storage element; and a control circuit for controlling the energy storage element to discharge by controlling the one or more switching elements in the switching circuit to perform an opening or closing action
Data Source
AI summary
The present application relates to a detection circuit for detecting a detector removal fault. The detection circuit comprises: a switching circuit. The switching circuit comprises one or more switching elements; an energy storage element; and a control circuit for controlling the energy storage element to discharge by controlling the one or more switching elements to perform an opening or closing action. The control circuit is configured to cause the energy storage element to discharge based on a first loop if the detector is removed from the diode bases, and to cause the energy storage element to discharge based on the first loop and a second loop including the terminal resistor if the detector is not removed from the diode bases. The control circuit is further configured to detect the detector removal fault based on an output voltage of the area monitoring module during discharge process.