Bus Line Unauthorized Device Detection via Electrical Impedance Analysis
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Solution Overview
Problem
Current methods cannot efficiently determine if an unauthorized device is connected to a bus line, requiring manual visual checks that are time-consuming and costly.
Innovation Solution
An information processing apparatus that compares measured voltage or impedance values on a bus line with normal values to detect unauthorized connections by evaluating differences in waveform characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual visual checks are used to determine unauthorized device connections, then detection capability is maintained, but time consumption and cost increase significantly
Solution Approach 1:
The patent replaces manual visual inspection with an automated measurement system that uses a measurement device to detect electrical characteristics (voltage, current, impedance) of the bus line. This automated electrical measurement system substitutes the mechanical/manual visual check process, enabling rapid detection of unauthorized devices without human intervention while significantly reducing time consumption.
2Productivity
If automated measurement systems are implemented to detect unauthorized devices, then detection efficiency improves, but system complexity increases
Solution Approach 1:
The patent designs the measurement device to perform multiple functions: it can measure various electrical characteristics (voltage, current, impedance) of the bus line, identify unauthorized devices based on these measurements, and potentially integrate with existing network management systems. This multi-functionality approach increases detection efficiency while managing system complexity by consolidating capabilities into a single versatile device rather than requiring multiple specialized tools.
3Measurement precision
If comprehensive electrical characteristic measurements are performed, then detection accuracy improves, but measurement complexity and processing requirements increase
Solution Approach 1:
The patent extracts and measures specific key electrical characteristics (voltage, current, impedance) that are most indicative of unauthorized device connections. Rather than attempting to measure all possible electrical parameters, the system focuses on extracting these critical measurements that provide sufficient accuracy for detection while minimizing measurement complexity and data processing requirements.
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 efficient detection of unauthorized devices connected to a bus line without the need for manual visual checks, reducing time and cost.
Implementation Method 1
Patent Literature 1 describes a technology called time domain relfectometry (TDR) for observing the reflection characteristic of a high-frequency step signal transmitted on a bus line
Data Source
AI summary
A comparison unit (22) compares a measurement value, which is one of changes over time in a voltage value of a bus line (11), distance transition of the voltage value, changes over time in an impedance value of the bus line (11), and distance transition of the impedance value that have been measured, with a normal value, which is one of changes over time in a voltage value of the bus line (11), distance transition of the voltage value, changes over time in an impedance value of the bus line (11), and distance transition of the impedance value in a normal state, and extracts a difference between the measurement value and the normal value. An unauthorized connection determination unit (24) evaluates the difference between the measurement value and the normal value extracted by the comparison unit (22), so as to determine whether an unauthorized device is connected to the bus line (11).