Superimposed Signal Communication Error Detection
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Solution Overview
Problem
Existing communication methods, such as IO-Link, face issues with increased wiring complexity and communication delays due to signal conversion in three-line-type electrical devices, making it difficult to distinguish between normal state transitions and communication errors caused by disconnection or noise.
Innovation Solution
A communication device that receives data signals superimposed on operation signals, featuring a period determination unit to differentiate between transition period errors and other errors, allowing for accurate state determination and error detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a communication device receives data signals superimposed on operation signals to reduce wiring complexity, then the number of wirings is reduced, but communication errors occur during transition periods of operation signal values
Solution Approach 1:
The period determination unit performs preliminary analysis by checking whether a communication error occurs during a transition period of the operation signal value. By anticipating and identifying transition periods before making final error determination, the system avoids false error detection during normal state changes while maintaining reliable error detection for actual communication failures.
2Reliability
If the communication device detects communication errors during state transitions, then communication reliability is improved, but normal state transitions are misidentified as communication errors
Solution Approach 1:
The state determination unit uses feedback from the period determination unit to make informed decisions about communication errors. The period determination unit provides information about whether the error occurred during a transition period, and the state determination unit uses this feedback to distinguish between normal transitions and actual communication failures, preventing false error detection.
3Adaptability or versatility
If signal conversion is performed in three-line-type electrical devices, then communication functionality is added, but communication delay time increases
Solution Approach 1:
The patent combines the operation signal and data signal into a single superimposed signal transmission channel. By merging these signals and using the existing operation signal line for both power/control and data communication, the system adds communication functionality without requiring additional signal conversion processes, thereby minimizing communication delay time.
Data Source
AI summary
Provided is a highly convenient communication device capable of detecting a communication error caused by an abnormality of a state of communication. A communication device capable of mutually communicating with an electrical device includes: a superimposed signal receiving unit that periodically receives a data signal related to the electrical device as a signal superimposed on an operation signal; a period determination unit that determines whether or not a communication error of the data signal detected by the superimposed signal receiving unit is able to be regarded as having occurred in a transition period of a value of the operation signal; and a state determination unit that determines a state of communication with the electrical device in accordance with the determination by the period determination unit.