WO2023116263A1 - 一种基于脑电图的眨眼咬牙判断方法及系统 - Google Patents
一种基于脑电图的眨眼咬牙判断方法及系统 Download PDFInfo
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- WO2023116263A1 WO2023116263A1 PCT/CN2022/131978 CN2022131978W WO2023116263A1 WO 2023116263 A1 WO2023116263 A1 WO 2023116263A1 CN 2022131978 W CN2022131978 W CN 2022131978W WO 2023116263 A1 WO2023116263 A1 WO 2023116263A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
- A61B5/1103—Detecting muscular movement of the eye, e.g. eyelid movement
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
- A61B5/1107—Measuring contraction of parts of the body, e.g. organ or muscle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
- A61B5/721—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
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- the reference point set is updated by the following method:
- Fig. 1 is a flow chart of a method for judging blinking and gritting teeth based on EEG provided by an embodiment of the present invention
- Blinking is a muscle movement process of closing and opening under the cooperation of the orbicularis oculi muscle and the levator muscle. Due to its proximity to the acquisition electrodes, its signal amplitude is very obvious on the scale of the EEG signal amplitude, as shown in Figure 2.
- steps S2 and S3 as the window slides, and at the same time update the reference point set in the process of obtaining the blink state value; the specific steps are: include the current data point at the end of the reference point set, and pop up the beginning element of the reference point set, ⁇
- ref is the reference point set element.
- This embodiment provides a design of an EEG-based blinking and teeth clenching artifact signal detection system on a MATLAB simulation platform.
- the real-time online implementation of the artifact signal detection system can be started.
- Fig. 4 is a schematic diagram of the off-line simulation result of an EEG-based blinking and teeth clenching judgment method provided by an embodiment of the present invention.
- a blink signal is detected at the peak distortion, thereby judging that the blinking behavior occurs; statistic point) and the clenching end state value (the statistic point for judging the end of the clenching signal) are combined to determine whether the clenching behavior occurs, and provide the clenching start point and clenching end point.
- An embodiment of the present invention provides a blinking and teeth clenching judgment system based on EEG, including:
- Gritting Judgment Module used to compare the current data point with the gnashing judgment threshold to obtain the gnashing state value. If the gnashing state value meets the preset gnashing state threshold, the output judgment result is gnashing, otherwise the output judgment result is not gnashing;
- Blink judgment module used to obtain the current acquisition window data of the sliding window and calculate the absolute value of the difference between it and the mean value of the reference point set, and compare the absolute value with the preset threshold of the standard deviation of the reference point set to obtain the blink state value, Comparing the blink state value with the preset blink state threshold, if the blink state value meets the preset blink state threshold, the output judgment result is blinking, otherwise the output judgment result is no blinking;
- the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
- computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
- the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.
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Abstract
Description
Claims (8)
- 一种基于脑电图的眨眼咬牙判断方法,其特征在于,包括:获取从脑电图中提取的参考点集并计算其均值和标准差;将当前数据点和咬牙判断阈值比较,得到咬牙状态值,若咬牙状态值满足预设的咬牙状态阈值则输出判断结果为咬牙,否则输出判断结果为未咬牙;获取滑动窗口的当前采集窗口数据并计算其与参考点集均值之差的绝对值,将所述绝对值和参考点集标准差的预设门限比较,得到眨眼状态值,将眨眼状态值和预设的眨眼状态阈值比较,若眨眼状态值满足预设的眨眼状态阈值则输出判断结果为眨眼,否则输出判断结果为未眨眼;根据预设的控制因子和当前数据点更新参考点集。
- 根据权利要求1所述的一种基于脑电图的眨眼咬牙判断方法,其特征在于,所述参考点集通过以下方法得到:获取用户的脑电图,从脑电图中提取出参考点集:使用滑动窗口的策略,将第一个采集窗口数据作为初始的参考点集。
- 根据权利要求1所述的一种基于脑电图的眨眼咬牙判断方法,其特征在于,所述咬牙判断阈值包括咬牙低阈值和咬牙高阈值,咬牙低阈值为参考点集均值和经验阈值两者的较大值,咬牙高阈值根据实际的咬牙波峰值情况预先设置。
- 根据权利要求3所述的一种基于脑电图的眨眼咬牙判断方法,其特征在于,所述咬牙状态值通过以下方法得到:其中,咬牙状态值包括咬牙开始状态值和咬牙结束状态值,gnashStartCount为咬牙开始状态值,gnashEndCount为咬牙结束状态值,curData i为当前 数据点,gnashLow是咬牙低阈值,gnashHigh是咬牙高阈值。
- 根据权利要求4所述的一种基于脑电图的眨眼咬牙判断方法,其特征在于,是否咬牙通过以下方法判断:其中,isGnash=true代表出现咬牙信号,输出判断结果为咬牙,isGnash=false代表未出现咬牙信号,输出判断结果为未咬牙;gnashStartCount为咬牙开始状态值,gnashEndCount为咬牙结束状态值,gnashStartThreshold为咬牙开始判断阈值,gnashEndThreshold为咬牙结束判断阈值。
- 根据权利要求5所述的一种基于脑电图的眨眼咬牙判断方法,其特征在于,所述眨眼状态值通过以下方法得到:其中,blinkCount是眨眼状态值,absDiff为当前采集窗口数据和参考点集均值之差的绝对值,blinkVal为参考点集标准差的预设门限;是否眨眼通过以下方法判断:其中,isblink=true代表出现眨眼信号,输出判断结果为眨眼,isGnash=false代表未出现咬牙信号,blinkCount是眨眼状态值,blinkThreshold为眨眼判断阈值,gnashStartCount为咬牙开始状态值,gnashEndCount为咬牙结束状态值;眨眼判断结束后重置咬牙状态值。
- 根据权利要求1所述的一种基于脑电图的眨眼咬牙判断方法,其特征在于,参考点集通过以下方法更新:其中,refi是参考点集的第i个元素,refi-1是参考点集的第i-1个元素, rawData i是当前数据点,γ是更新参考点集的控制因子;将当前数据点纳入参考点集的末尾,并弹出参考点集的开头元素。
- 一种基于脑电图的眨眼咬牙判断系统,其特征在于,包括:参考点集获取模块:用于获取从脑电图中提取的参考点集并计算其均值和标准差;咬牙判断模块:用于将当前数据点和咬牙判断阈值比较,得到咬牙状态值,若咬牙状态值满足预设的咬牙状态阈值则输出判断结果为咬牙,否则输出判断结果为未咬牙;眨眼判断模块:用于获取滑动窗口的当前采集窗口数据并计算其与参考点集均值之差的绝对值,将所述绝对值和参考点集标准差的预设门限比较,得到眨眼状态值,将眨眼状态值和预设的眨眼状态阈值比较,若眨眼状态值满足预设的眨眼状态阈值则输出判断结果为眨眼,否则输出判断结果为未眨眼;参考点集更新模块:用于根据预设的控制因子和当前数据点更新参考点集。
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| CN120549514A (zh) * | 2025-08-01 | 2025-08-29 | 天津大学 | 脑电信号处理方法及脑机交互系统 |
| CN120929972A (zh) * | 2025-05-28 | 2025-11-11 | 中国科学院软件研究所 | 基于单通道脑电信号的时频特征融合的自主眨眼识别方法和系统 |
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| CN114431879B (zh) * | 2021-12-24 | 2024-04-16 | 南京邮电大学 | 一种基于脑电图的眨眼咬牙判断方法及系统 |
| CN115067944B (zh) * | 2022-08-22 | 2022-11-11 | 深圳市心流科技有限公司 | 一种眼动状态评估方法、装置、终端设备及存储介质 |
| CN115399789A (zh) * | 2022-09-05 | 2022-11-29 | 北京脑陆科技有限公司 | 视觉眩晕脑电信号分类方法、装置、设备和介质 |
| CN116671900B (zh) * | 2023-05-17 | 2024-03-19 | 安徽理工大学 | 一种基于脑波仪的眨眼识别与控制方法 |
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| CN116671938A (zh) * | 2023-07-27 | 2023-09-01 | 之江实验室 | 一种任务执行方法、装置、存储介质及电子设备 |
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| CN120549514A (zh) * | 2025-08-01 | 2025-08-29 | 天津大学 | 脑电信号处理方法及脑机交互系统 |
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