Serial Bus Fault Detection Apparatus
Solution Overview
Problem
Current detection methods for serial bus faults, such as RS485, are inadequate in quickly identifying and locating wire faults beyond simple short circuits and open circuits, often leading to incorrect assessments and low efficiency in on-site construction and maintenance due to complex cabling and wiring conditions.
Innovation Solution
A detection apparatus and method utilizing a voltage divider module, voltage follower module, and control module connected to a serial bus, which reduces voltage, enhances electrical signals, and forward biases voltages to accurately determine wire fault types by measuring digital voltages against electrical standards, enabling quick fault location and diagnosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a comparator-based detection method is used to detect bus state, then the detection structure is simple, but the detection accuracy is insufficient and cannot distinguish reverse connection from normal state
Solution Approach 1:
The patent segments the detection process into multiple independent measurement stages: first measuring the voltage of the first bus line, then measuring the voltage of the second bus line, and comparing the difference. This segmentation allows the system to distinguish between normal state and reverse connection by analyzing voltage differences across separate measurement steps, thereby improving detection accuracy without significantly increasing overall system complexity.
Solution Approach 2:
The patent performs preliminary voltage measurements on both bus lines before making a fault determination. By pre-measuring the voltages of the first and second bus lines and calculating their difference, the system prepares the necessary data in advance, enabling accurate distinction between normal operation and reverse connection conditions before final judgment is made.
2Reliability
If manual cable checking is performed to locate wire faults, then the detection comprehensiveness is high, but the detection time is excessive and working efficiency is low
Solution Approach 1:
The detection device is designed to autonomously perform comprehensive fault detection without requiring manual cable-by-cable checking. The system automatically measures voltages, calculates differences, identifies fault types (open circuit, short circuit, reverse connection), and locates faults, thereby maintaining high detection comprehensiveness while eliminating the time-consuming manual inspection process.
Solution Approach 2:
The patent creates a universal detection device that can identify multiple types of wire faults (open circuit, short circuit, reverse connection) through a single integrated measurement and analysis process. This multi-functional approach allows the system to comprehensively detect various fault conditions without requiring separate manual checking procedures for each fault type, significantly reducing detection time while maintaining comprehensive fault coverage.
3Speed
If voltage measurement is performed during serial bus communication, then the detection real-time capability is improved, but the measurement accuracy deteriorates due to signal interference
Solution Approach 1:
The patent implements a dynamic detection approach that can operate during serial bus communication. The system continuously or periodically measures the voltages of the first and second bus lines while communication is active, allowing real-time fault detection. The dynamic measurement process adapts to changing communication states, maintaining both real-time capability and measurement accuracy by capturing voltage differences during actual operation rather than requiring system shutdown.
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 improves detection accuracy and efficiency by preventing interference with serial bus communication, ensuring measurement accuracy in different states, and quickly identifying and locating wire faults, thereby enhancing detection rates and accuracy.
Implementation Method 1
a voltage divider module, configured to reduce a voltage of the first bus and a voltage of the second bus
Implementation Method 2
a voltage follower module, configured to enhance an electrical signal of the first bus and an electrical signal of the second bus
Implementation Method 3
a forward bias module, configured to forward bias the voltage of the first bus and the voltage of the second bus
Data Source
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AI summary
Embodiments of this application relate to the field of communications technologies, and in particular, to a detection apparatus and method for quickly locating a wire fault of a serial bus and finding a cause. The apparatus is connected to a serial bus between a primary device and a secondary device, the serial bus includes a first bus and a second bus, and the apparatus includes a voltage divider module, a voltage follower module, a forward bias module, and a control module that are sequentially connected. The voltage divider module is configured to reduce a voltage of the first bus and a voltage of the second bus. The voltage follower module is configured to enhance an electrical signal of the first bus and an electrical signal of the second bus. The forward bias module is configured to forward bias the voltage of the first bus and the voltage of the second bus. The control module is configured to: measure a digital voltage of the first bus and a digital voltage of the second bus, and determine a wire fault type of the serial bus based on the digital voltage of the first bus, the digital voltage of the second bus, and an electrical standard for the serial bus.