Ring Bus Creeping Interruption Detection Device
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Solution Overview
Problem
Ring bus systems fail to detect creeping interruptions, which are gradual increases in resistance that can go unnoticed, leading to potential network failures, especially in critical security systems like fire and burglary alarm systems.
Innovation Solution
A device with a voltage measuring unit and evaluation unit that measures resistance changes along the ring bus, using voltage and current modulation to detect and locate creeping interruptions, allowing for disconnection and maintaining network availability by triggering bus elements from both sides of the ring bus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ring bus systems are used, then the system structure is simple and easy to implement, but creeping interruptions in the line cannot be detected
Solution Approach 1:
The device performs preliminary measurements of the resistance curve along the ring bus during normal operation, before any interruption occurs. By continuously monitoring resistance values at different points in the ring bus and establishing a baseline resistance curve, the system is prepared to detect deviations that indicate creeping interruptions, enabling early detection without waiting for complete line failure.
Solution Approach 2:
The invention replaces physical inspection methods with electrical measurement techniques. Instead of mechanically testing the line or waiting for visible failure symptoms, the system uses electrical resistance measurements to detect changes in the line's electrical properties. The voltage measuring unit and evaluation unit substitute for physical line testing, using electrical signals to diagnose line conditions.
2Reliability
If creeping interruptions are not detected, then the system operates without additional monitoring equipment, but network failures occur undetected leading to reduced availability
Solution Approach 1:
The device performs multiple functions using a single integrated system. It measures the resistance curve for detection purposes, identifies the location of interruptions, and provides information for isolating affected segments. The evaluation unit analyzes resistance data to both detect the presence of creeping interruptions and determine their position, combining detection and localization functions in one device.
Solution Approach 2:
The ring bus system monitors itself through the device that measures resistance along the existing bus lines. The system uses its own electrical characteristics (voltage and current flow through the bus) to detect changes in line condition without requiring separate test signals or external monitoring equipment. The normal operational current is used to generate the voltage measurements needed for detection.
3Measurement precision
If the ring bus is disconnected to isolate interruptions, then detection precision improves, but network operation is interrupted
Solution Approach 1:
The device performs preliminary measurement of the complete resistance curve along the entire ring bus while it remains connected and operational. By measuring resistance at multiple points before any disconnection, the system establishes a baseline that spans the full ring bus configuration. This preliminary data allows accurate determination of interruption locations without requiring subsequent physical disconnection for measurement.
Solution Approach 2:
The device acts as an intermediary that provides virtual isolation through electrical measurement rather than physical disconnection. By analyzing resistance values and identifying where abnormal increases occur in the resistance curve, the system determines the location of creeping interruptions and can logically isolate affected segments through control signals to bus elements, maintaining physical connectivity while achieving functional 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
Enables early detection and isolation of creeping interruptions, ensuring high operational reliability and low failure probability in security-critical systems by maintaining bus element operability and preventing network failures.
Implementation Method 1
measuring a resistance curve of the line and determining from the resistance curve a location at which the resistance curve has an abnormally high gradient
Data Source
AI summary
A device for detecting interruptions in a ring bus has a first interface configured so that it permits connection of a first free end of a line of the ring bus so that the device transmits data to bus elements of the ring bus via the first interface, a second interface configured so that it permits connection of the second free end of the line of the ring bus, and the device detects a creeping interruption of the line of the ring bus.