Communication failure determination device
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Solution Overview
Problem
Existing communication systems lack efficient methods to determine failures in communication lines, particularly in multi-type air conditioning systems, which can affect the performance and reliability of the system.
Innovation Solution
A communication failure determination device that acquires communication quality information using high-frequency signals to determine the carrier-to-noise ratio of communication lines between air conditioning units, and sets thresholds to identify failures based on normal state values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If communication quality information is acquired using high-frequency signals (≥100 kHz), then the ability to detect communication line failures is improved, but the complexity of the determination device increases
Solution Approach 1:
The patent introduces a determination device as an intermediary component that mediates between the communication devices and the failure detection process. This dedicated intermediary unit simplifies the overall system architecture by centralizing the measurement functions rather than requiring complex integrated circuits within each communication device.
Solution Approach 2:
The patent replaces physical inspection methods with electromagnetic field-based detection. By using high-frequency signals to measure communication quality parameters (voltage, current, impedance), the system substitutes mechanical or manual failure detection with automated electromagnetic measurements, improving both precision and efficiency.
2Measurement precision
If communication quality information is acquired using high-frequency signals (≥100 kHz), then the ability to detect communication line failures is improved, but the cost of the determination device increases
Solution Approach 1:
The determination device is designed with multi-functionality, serving both as a communication interface and a measurement instrument. By making the determination device universal—capable of both transmitting control signals and measuring communication quality—the patent reduces the need for separate dedicated measurement equipment, thereby lowering manufacturing costs.
Solution Approach 2:
The patent utilizes changes in electrical parameters (voltage, current, impedance) that naturally occur during high-frequency communication to derive failure information. Instead of requiring additional sensors or measurement hardware, the system extracts diagnostic information from existing communication signals, reducing device complexity and manufacturing cost.
3Speed
If communication is performed at high frequency (≥100 kHz), then the communication speed is improved, but the susceptibility to noise and interference increases
Solution Approach 1:
The patent implements a feedback mechanism where the determination device continuously monitors communication quality parameters and uses this information to assess line health. By measuring parameters such as voltage, current, and impedance during high-frequency communication, the system can detect noise-induced variations and identify failures even in noisy environments.
Solution Approach 2:
The patent applies high-frequency signals (≥100 kHz) that exceed the minimum required for communication, using the excessive frequency range to improve signal-to-noise ratio through better shielding and filtering characteristics. The high-frequency nature of the signals allows for more effective electromagnetic containment, reducing susceptibility to external noise despite the inherent vulnerabilities of high-frequency transmission.
Data Source
AI summary
A communication failure determination device determines a failure of a communication line in a communication system including two or more communication devices connected in a wired manner by the communication line. The communication failure determination device includes a determination unit. The determination unit acquires communication quality information when communication is performed between the communication devices, and determines whether or not a failure occurs in the communication line based on the communication quality information. The communication devices communicate with each other at a frequency equal to or higher than 100 kHz.