Research on Synchronization Accuracy of Parallel Port Between Measurement
Equipment for Brain Science
JIANG Xu1, CHEN Biao1, ZHANG Xian2, LIANG Zhen1
1. School of Biomedical Engineering, Anhui Medical University, Hefei Anhui 230032, China;
2. Anhui Center for Drug Evaluation & Inspection, Hefei Anhui 230011, China
Abstract：Objective To explore the timing accuracy of USB to parallel port and the time error between synchronization signals,
and realize the high-precision time synchronization between measurement equipment for brain science, so as to accurately complete
stimulation-response experiments related to brain potential. Methods Softwares named PsychToolbox, PsychoPy, E-prime, and
OpenSesame to present visual stimulation, and logic analyzer were used to collect data from USB to parallel port. Results The
time error of USB to parallel port under PsychToolbox and PsychoPy was between -5.290 ms and -3.168 ms, which was less than
that between E-prime and OpenSesame; the timing precision of USB to parallel port under PsychToolbox was better than that of
PsychoPy, E-prime and OpenSesame, which could reach (100±0.193) ms. Conclusion This paper clarifies the timing precision
of USB to parallel port and the time error between synchronization signals, which can provide reliable guidance for accurate
measurement of high-precision stimulus-response experiments.
江旭1，陈彪1，张弦2，梁振1. 脑科学测量设备之间的并口同步精度研究[J]. 中国医疗设备, 2022, 37(5): 29-32.
JIANG Xu1, CHEN Biao1, ZHANG Xian2, LIANG Zhen1. Research on Synchronization Accuracy of Parallel Port Between Measurement
Equipment for Brain Science. China Medical Devices, 2022, 37(5): 29-32.
