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A High Speed Wireless Synchronous Exposure System Based on TDMA

In a system composed of a line array CCD and multiple LEDs, it is necessary to accurately obtain the CCD exposure sequence and work on the exposure while the LEDs are lit, which makes time synchronization more difficult under wireless conditions. In this paper, a wireless synchronous exposure system based on time division multiple access (TDMA) timing is proposed. The method reduces the network load and hardware power consumption and avoids the use of signal lines for synchronization between nodes. The exposure errors are described, and the errors generation is theoretically analyzed and experimentally verified. The method of node clock synchronization is proposed, and through experiments and data analysis, it is shown that the exposure accuracy reaches 1 μs and can operate stably for a long time.