Wireless Imaging Control Timing via Timestamp Feedback
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Solution Overview
Problem
Existing wireless imaging systems face challenges in maintaining accurate time intervals between control operations due to varying delay times in wireless communication, which can lead to overexposure or underexposure, and inefficient band usage, especially in industrial settings where precise timing is critical.
Innovation Solution
A wireless imaging system with a control unit, transmission unit, and receiving unit that determines whether received control information is leading or succeeding, allowing for precise timing decisions to maintain minimal delay and optimal band usage by outputting control information based on leading and succeeding control timings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If wireless communication is used to transmit imaging control information, then cable deterioration and breakage are avoided, but the time intervals between control operations cannot be maintained accurately due to varying delay times
Solution Approach 1:
The transmitting side records time stamps for each control operation (exposure start, light emission start/end, exposure end) before transmission. The receiving side uses these pre-recorded time stamps to determine the exact timing of each control operation, eliminating the need to compensate for variable wireless transmission delays and maintaining precise timing intervals.
2Reliability
If MAC processing is performed in advance to secure wireless band, then fluctuations in delay time are suppressed, but the time during which peripheral devices cannot perform wireless communication prolongs, increasing cycle time
Solution Approach 1:
The receiving side records the actual reception timing of each control operation and feeds back this timing information to the transmitting side. The transmitting side uses this feedback to adjust future transmission timing, dynamically optimizing the use of wireless band while maintaining reliable timing intervals without requiring prolonged MAC processing in advance.
Data Source
AI summary
A wireless apparatus includes a determination unit configured to determine whether the received control information is leading control information for controlling the imaging process or succeeding control information succeeding the leading control information, a decision unit configured to decide a succeeding control timing at which the succeeding control information is output, with reference to a leading control timing at which the leading control information is output, and an output unit configured to output the leading control information to the imaging unit in accordance with the leading control timing and output the succeeding control information to the imaging unit in accordance with the succeeding control timing.