Communication device, communication method and program
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Communication systems using three-core cables for air conditioning units face quality issues due to inductive noise caused by alternating-current voltage, which impairs normal communication when cable lengths increase.
Innovation Solution
A communication apparatus that detects the phase of alternating-current voltage and only transmits or receives electric current signals when the phase is outside a specific range where induced current exceeds a reference value, thereby avoiding periods of inductive noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the cable length is increased to extend communication range, then the coverage area is improved, but inductive noise increases causing communication failure
Solution Approach 1:
The communication apparatus periodically monitors the phase of alternating-current voltage and selectively performs communication only during time periods when the phase is outside the specific range that causes excessive induced current. This periodic detection and selective communication timing transforms continuous communication into periodic action, avoiding inductive noise occurrences while maintaining extended communication range through longer cables.
2Productivity
If communication is performed continuously without phase detection, then communication efficiency is maintained, but communication quality deteriorates due to inductive noise
Solution Approach 1:
The communication apparatus incorporates a detection means that continuously monitors the phase of alternating-current voltage and provides feedback to the communication means. Based on this feedback, the system dynamically adjusts communication timing to avoid phases where induced current exceeds the reference value. This feedback mechanism ensures high communication quality by eliminating inductive noise interference while maintaining efficient communication through automated phase-based scheduling.
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
This configuration improves communication quality by preventing inductive noise interference, ensuring reliable communication even with longer cables.
Implementation Method 1
detection means detects the phase of an alternating-current voltage applied between a first terminal for connecting to the power source line and a second terminal for connecting to the shared line
Implementation Method 2
a current may be induced in the communication line due to the power source voltage depending on the line capacity and cause inductive noise
Data Source
AI summary
A communication apparatus is connected to another communication apparatus via a power source line, a signal line, and a shared line. The communication apparatus includes a detector and a communicator. The detector detects the phase of an alternating-current voltage applied between a first terminal for connecting to the power source line and a second terminal for connecting to the shared line. The communicator communicates with the other communication apparatus by executing at least one of transmission or reception of an electric current signal generated by opening and closing a circuit including the signal line and the shared line except when the phase detected by the detector is within a specific range. The specific range is defined as a range in which an induced electric current flowing through the signal line due to the alternating-current voltage is greater than a reference value.