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Method for clock synchronization among group wireless EEG collection devices

A clock synchronization and acquisition device technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as timer errors that cannot be solved, and achieve the effect of real-time clock errors

Active Publication Date: 2018-04-13
睿芯医疗科技(南京)有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a more accurate synchronous clock in the initial stage of work, but it still cannot solve the problem of timer errors caused by different crystal oscillators in the slave during long-term continuous work

Method used

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  • Method for clock synchronization among group wireless EEG collection devices
  • Method for clock synchronization among group wireless EEG collection devices
  • Method for clock synchronization among group wireless EEG collection devices

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] Such as Figure 4 As shown, a method for clock synchronization between group wireless EEG acquisition devices comprises the following steps:

[0024] S1: Data acquisition, assuming that all slaves are independent devices, and the slaves use their own on-board crystal oscillators as sampling cycle timers to collect the EEG data of different subjects;

[0025] S2: wireless transmission, every time the slave machine collects new data, it immediately sends it to the host machine wirelessly;

[0026] S3: Data update, the host creates a channel data temporary register for each channel of all slaves, and updates the channel data in the corresponding data temporary register every time it receives new data from the slave, and keeps the channel temporary storage all the time The data in the device is the latest channel data currently received;

[0027] S4: Re-sampling clock alignment, the host uses a clock counter for timing, and re-samples all channel data in the channel tempo...

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Abstract

The invention provides a method for clock synchronization among group wireless EEG collection devices. The method comprises the following steps of 1, data collection, wherein a slave adopts an onboardcrystal oscillator as a sampling period timer, and different tested EEG data are collected; 2, wireless transmission, wherein the slave immediately sends the data collected every time to a host in awireless mode; 3, data updating, wherein the host builds a channel data temporary register for each channel of the host, and keeping the data in the channel temporary registers as the currently-received latest channel data all the time; 4, secondary sampling clock alignment, wherein clock counter timing is adopted inside the host, and secondary sampling is performed on all the channel data in thechannel temporary registers in each sampling period, and clock aligned data is obtained. A data transmission mechanism for real-time effective data alignment can be achieved, and the problem that an accumulative effect is caused by clock errors in the remote EEG collection recording process is solved.

Description

technical field [0001] The invention belongs to the technical field of EEG acquisition devices, and in particular relates to a clock synchronization method among group wireless EEG acquisition devices. Background technique [0002] The working mode of the existing group wireless EEG acquisition equipment is usually to connect multiple slave devices to the host in a star-shaped network, such as figure 1 As shown in the figure, when all the slave machines are independent of each other, each collects the EEG data of different users, and finally collects the process of the master. In the fields of neuroscience and psychology, in the application of EEG acquisition and analysis, external stimuli such as sound and light are often required to obtain event-related evoked potentials (ERPs) on subjects. Therefore, all slaves in the networking equipment are required to have a unified reference clock line. The clock error between all slaves does not exceed 1ms. However, since all the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0476
CPCA61B5/369
Inventor 马梅方贡旭彬
Owner 睿芯医疗科技(南京)有限公司