Sensor Microcomputer Synchronization via Constant Cycle Transmission
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Solution Overview
Problem
In conventional communication systems, when the transmission cycle of a sensor and the operation cycle of a microcomputer are not synchronized, transmission failures can occur, leading to deteriorated control performance or complete failure of control operations, especially if the synchronization signal is abnormal.
Innovation Solution
A communication system where a microcomputer transmits a synchronization signal synchronized with its operation cycle to a sensor, which adjusts its transmission timing based on this signal, ensuring continuous sensor signal reception even if the synchronization signal is abnormal, allowing the microcomputer to perform control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor transmits the sensor signal to the microcomputer after the sensor receives a trigger signal transmitted from the microcomputer, then the operation cycle of microcomputer and the transmission cycle of the sensor can be synchronized with each other, but when the transmission of the trigger signal has an abnormality and a transmission failure occurs to the trigger signal, the sensor signal cannot be transmitted from the sensor to the microcomputer
Solution Approach 1:
The sensor apparatus transmits the sensor signal at a predetermined constant cycle in advance without waiting for a trigger signal from the microcomputer. This preliminary action ensures that sensor signals are continuously available at the microcomputer regardless of trigger signal transmission status, resolving the contradiction between synchronization reliability and transmission dependency.
2Reliability
If the sensor transmits the sensor signal at a predetermined constant cycle without receiving a trigger signal, then the sensor signal can be transmitted continuously to the microcomputer, but the transmission cycle of the sensor may be shifted from the operation cycle of the microcomputer, and a control performance of the microcomputer may be deteriorated
Solution Approach 1:
The sensor apparatus detects whether a trigger signal has been received from the microcomputer and adjusts its transmission timing accordingly. When a trigger signal is received, the sensor aligns its transmission cycle with the microcomputer's operation cycle, providing feedback-based synchronization that maintains both continuous transmission reliability and optimal control performance.
Data Source
AI summary
A communication system includes a sensor apparatus transmitting a sensor signal including detection information of a detection target as a digital signal and a microcomputer receiving the sensor signal through a signal line and performing a control operation at a predetermined operation cycle based on the sensor signal that is received. The microcomputer transmits, to the sensor apparatus, a synchronization signal which is synchronized with the predetermined operation cycle of the microcomputer. The sensor apparatus transmits the sensor signal at a predetermined constant cycle except when the synchronization signal transmitted by the microcomputer is received. The sensor apparatus changes a transmission timing of the sensor signal corresponding to the synchronization signal when the synchronization signal transmitted by the microcomputer is received.