Article(id=1197492488324821570, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1197492487066530363, articleNumber=null, orderNo=null, doi=10.19620/j.cnki.1000-3703.20240216, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1715616000000, revisedDateStr=2024-05-14, acceptedDate=null, acceptedDateStr=null, onlineDate=1763434057551, onlineDateStr=2025-11-18, pubDate=1742745600000, pubDateStr=2025-03-24, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763434057551, onlineIssueDateStr=2025-11-18, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763434057551, creator=13701087609, updateTime=1763434057551, updator=13701087609, issue=Issue{id=1197492487066530363, tenantId=1146029695717560320, journalId=1189621681917173762, year='2025', volume='', issue='3', pageStart='1', pageEnd='62', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763434057251, creator=13701087609, updateTime=1763434367830, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1197493789779603575, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1197492487066530363, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1197493789779603576, tenantId=1146029695717560320, journalId=1189621681917173762, issueId=1197492487066530363, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=22, endPage=29, ext={EN=ArticleExt(id=1197492488513565253, articleId=1197492488324821570, tenantId=1146029695717560320, journalId=1189621681917173762, language=EN, title=A Driving Fatigue Detection Method Based on Ensemble Learning and Multidimensional Pulse Feature Fusion, columnId=1200009531011985931, journalTitle=Automobile Technology, columnName=Special Topic on Multimodal Information Monitoring and Recognition Technologies for Human Factors in Intelligent Driving, runingTitle=null, highlight=null, articleAbstract=
In order to enhance accuracy of driving fatigue detection, this paper takes drivers’ physiological signal pulse wave as the data source, introduces hemodynamic-based blood pressure waveform features based on the extraction of Heart Rate Variability (HRV) features. Moreover, a feature indicator set that can effectively characterize driving fatigue is constructed, and a three-classification model of driver fatigue is constructed based on ensemble learning. Then, a resampling method is introduced in the data preprocessing stage, and the effects of different sampling methods on the detection performance of the model are contrasted. Test results show that multidimensional feature fusion of pulse signals can significantly improve the detection accuracy of driver fatigue by 24.68 percentage points on average in all scenarios compared with the method of using only HRV features; resampling can further enhance the detection performance of the ensemble learning model, and the model achieves the best detection performance in a scenario with a sampling window width of 2 min, a sampling window overlap of 80%, and a fusion of HRV features with pulse waveform features.
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*, columnId=1200009531179758092, journalTitle=汽车技术, columnName=智能驾驶中人因状态多模态信息监测与识别技术专题, runingTitle=null, highlight=null, articleAbstract=
为了提升驾驶疲劳检测准确性,以驾驶员的生理信号脉搏波为数据源,在提取心率变异性特征的基础上,引入基于血液动力学的脉搏波波形特征进行多维特征融合,构建可以有效表征驾驶疲劳的特征数据集,并基于集成学习构建驾驶员疲劳状态三分类模型,在数据预处理阶段引入重采样方法,并对比不同采样方式对模型检测性能的影响。试验结果表明:脉搏信号多维特征融合可以显著提高对驾驶疲劳的检测精度,相对于仅采用心率变异性特征的方法,在各场景下检测精度能够平均提高24.68百分点;重采样可进一步提高集成学习模型的检测性能,在采样窗口宽度为2 min、采样窗口重叠为80%、心率变异性特征与脉搏波波形特征融合的场景下,模型的检测性能达到最佳。
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不同采样场景脉搏特征融合检测流程, figureFileSmall=zedW7wCYEd6yzrEwodV7RQ==, figureFileBig=iqhOsMA++tEHvAFwjtNKug==, tableContent=null), ArticleFig(id=1200009541292225199, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1197492488324821570, language=EN, label=null, caption=null, figureFileSmall=OxCMHHri3V8KCjfPGx9H4w==, figureFileBig=PIHw+O7i5HX7vU5DEjSjkA==, tableContent=null), ArticleFig(id=1200009541447414448, tenantId=1146029695717560320, journalId=1189621681917173762, articleId=1197492488324821570, language=CN, label=图5, caption=
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| KSS | 疲劳程度描述 |
| 1 | 极度警觉 |
| 2 | 很警觉 |
| 3 | 警觉 |
| 4 | 有点警觉 |
| 5 | 既不警觉,也不疲劳 |
| 6 | 出现疲劳迹象 |
| 7 | 疲劳,但可以保持清醒 |
| 8 | 疲劳,需要努力保持清醒 |
| 9 | 非常疲劳,常陷入瞌睡 |
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KSS疲劳等级划分
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| KSS | 疲劳程度描述 |
| 1 | 极度警觉 |
| 2 | 很警觉 |
| 3 | 警觉 |
| 4 | 有点警觉 |
| 5 | 既不警觉,也不疲劳 |
| 6 | 出现疲劳迹象 |
| 7 | 疲劳,但可以保持清醒 |
| 8 | 疲劳,需要努力保持清醒 |
| 9 | 非常疲劳,常陷入瞌睡 |
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| 分析域 | 名称 | 描述 |
| 时域 | MeanNN | 平均搏动间期 |
| RangeNN | 搏动间期极差 |
| MedianNN | 搏动间期连续差值绝对值中位数 |
| MeanHR | 平均心率 |
| MinHR | 最小心率 |
| MaxHR | 最大心率 |
| StdHR | 心率标准差 |
| RMSSD | 相邻搏动间期差值的均方根 |
| SDNN | 搏动间期标准差 |
| CVNN | SDNN与MeanNN的比值 |
| CVSD | RMSSD与MeanNN的比值 |
| SDSD | 相邻搏动间期之间差值的标准差 |
| pNN20 | 大于20 ms的搏动间期占比 |
| pNN50 | 大于50 ms的搏动间期占比 |
| Sampen | 搏动间期的时域样本熵 |
| 频域 | LF | 低频范围(0.04~0.15 Hz)功率 |
| HF | 高频范围(0.15~0.4 Hz)功率 |
| LF/HF | LF与HF的比值 |
| VLF | 极低频范围(0.003 3~0.04 Hz)功率 |
| TP | 全部频率范围内的总功率 |
非线 性域 | SD1 | 庞加莱图椭圆长轴标准差 |
| SD2 | 庞加莱图椭圆短轴标准差 |
| SD1/SD2 | SD1与SD2的比值 |
| CVI | 心脏迷走神经指数 |
| CSI | 心脏交感神经指数 |
| mCSI | 改良心脏交感神经指数 |
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HRV特征
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| 分析域 | 名称 | 描述 |
| 时域 | MeanNN | 平均搏动间期 |
| RangeNN | 搏动间期极差 |
| MedianNN | 搏动间期连续差值绝对值中位数 |
| MeanHR | 平均心率 |
| MinHR | 最小心率 |
| MaxHR | 最大心率 |
| StdHR | 心率标准差 |
| RMSSD | 相邻搏动间期差值的均方根 |
| SDNN | 搏动间期标准差 |
| CVNN | SDNN与MeanNN的比值 |
| CVSD | RMSSD与MeanNN的比值 |
| SDSD | 相邻搏动间期之间差值的标准差 |
| pNN20 | 大于20 ms的搏动间期占比 |
| pNN50 | 大于50 ms的搏动间期占比 |
| Sampen | 搏动间期的时域样本熵 |
| 频域 | LF | 低频范围(0.04~0.15 Hz)功率 |
| HF | 高频范围(0.15~0.4 Hz)功率 |
| LF/HF | LF与HF的比值 |
| VLF | 极低频范围(0.003 3~0.04 Hz)功率 |
| TP | 全部频率范围内的总功率 |
非线 性域 | SD1 | 庞加莱图椭圆长轴标准差 |
| SD2 | 庞加莱图椭圆短轴标准差 |
| SD1/SD2 | SD1与SD2的比值 |
| CVI | 心脏迷走神经指数 |
| CSI | 心脏交感神经指数 |
| mCSI | 改良心脏交感神经指数 |
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| 特征变量 | 符号 | 计算公式 | 特征描述 |
| 搏动指数 | | | 衡量脉搏波形在心脏收缩和舒张间变化 |
| 搏动间期脉搏压均值 | | | 脉搏压在一个心动周期的积分,即曲线下面积。其中,一个心动周期为T=Tn+Td |
| 射血上升期比率 | | | 射血上升期与整个心动周期的比值 |
| 心内膜下活性比 | | | 舒张压面域与收缩压面域的比值 |
| 收缩压面域比 | | | 收缩压面域面积占整个心动周期脉搏压面积的百分比 |
| 收缩末期平均舒张压 | | | 收缩末期整个脉搏波平均压力增量 |
| 脉搏波波形指数 | | | 表征脉搏波的形状特性 |
| 直流分量比率 | | | 血容量脉冲包含直流分量和脉动分量,直流分量比率为直流分量在血容量脉冲中的占比 |
| 每搏输出量 | | | 射血期流过动脉的血液流量,本文使用经验常数 =0.66,即射血期时间与心动周期的比例 |
| 心输出量 | | | 每搏输出量与心率的乘积,即射血期脉搏波下的面积,心率使用心跳间隔计算:60/ |
| 脉搏压变异率 | | | 脉搏压的变化率,本文使用5个心动周期(3~5 s),Pmax、Pmin分别为脉搏压最大值和最小值 |
| 每搏输出量变异率 | | | 单位时间内最大每搏量与最小每搏量的差值通每搏量平均值的比值,其中,SVmean、SVmax、SVmin分别为近期20 s内每搏输出量的均值、最大值和最小值 |
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一个心动周期中BPW特征指标参数
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| 特征变量 | 符号 | 计算公式 | 特征描述 |
| 搏动指数 | | | 衡量脉搏波形在心脏收缩和舒张间变化 |
| 搏动间期脉搏压均值 | | | 脉搏压在一个心动周期的积分,即曲线下面积。其中,一个心动周期为T=Tn+Td |
| 射血上升期比率 | | | 射血上升期与整个心动周期的比值 |
| 心内膜下活性比 | | | 舒张压面域与收缩压面域的比值 |
| 收缩压面域比 | | | 收缩压面域面积占整个心动周期脉搏压面积的百分比 |
| 收缩末期平均舒张压 | | | 收缩末期整个脉搏波平均压力增量 |
| 脉搏波波形指数 | | | 表征脉搏波的形状特性 |
| 直流分量比率 | | | 血容量脉冲包含直流分量和脉动分量,直流分量比率为直流分量在血容量脉冲中的占比 |
| 每搏输出量 | | | 射血期流过动脉的血液流量,本文使用经验常数 =0.66,即射血期时间与心动周期的比例 |
| 心输出量 | | | 每搏输出量与心率的乘积,即射血期脉搏波下的面积,心率使用心跳间隔计算:60/ |
| 脉搏压变异率 | | | 脉搏压的变化率,本文使用5个心动周期(3~5 s),Pmax、Pmin分别为脉搏压最大值和最小值 |
| 每搏输出量变异率 | | | 单位时间内最大每搏量与最小每搏量的差值通每搏量平均值的比值,其中,SVmean、SVmax、SVmin分别为近期20 s内每搏输出量的均值、最大值和最小值 |
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| 模型 | 超参数 | 名称 | 取值 |
| Random Forest | n_estimators | 基学习器数量 | 350 |
| max_depth | 最大深度 | None |
| min_samples_split | 节点分裂所需的最小样本数 | 2 |
| min_samples_leaf | 叶节点所需的最小样本数 | 1 |
| bootstrap | 自助采样 | False |
| AdaBoost | n_estimators | 基学习器数量 | 400 |
| learning_rate | 学习率 | 1.5 |
| Gradient Boosting | n_estimators | 基学习器数量 | 250 |
| learning_rate | 学习率 | 0.5 |
| max_depth | 最大深度 | 5 |
| Bagging | n_estimators | 基学习器数量 | 50 |
| max_samples | 采样的最大样本数 | 1.0 |
| max_features | 采样的最大特征数 | 0.1 |
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模型相关超参数
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| 模型 | 超参数 | 名称 | 取值 |
| Random Forest | n_estimators | 基学习器数量 | 350 |
| max_depth | 最大深度 | None |
| min_samples_split | 节点分裂所需的最小样本数 | 2 |
| min_samples_leaf | 叶节点所需的最小样本数 | 1 |
| bootstrap | 自助采样 | False |
| AdaBoost | n_estimators | 基学习器数量 | 400 |
| learning_rate | 学习率 | 1.5 |
| Gradient Boosting | n_estimators | 基学习器数量 | 250 |
| learning_rate | 学习率 | 0.5 |
| max_depth | 最大深度 | 5 |
| Bagging | n_estimators | 基学习器数量 | 50 |
| max_samples | 采样的最大样本数 | 1.0 |
| max_features | 采样的最大特征数 | 0.1 |
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| 方案 | 特征 | 算法 | 类别 | F1/% |
| 文献[4] | HRV | RF | 2 | 91.00 |
| 文献[6] | HRV | RF | 2 | 86.36 |
| 文献[7] | HRV | SVM、KNN | 2 | 96.00 |
| 文献[16] | HRV | RF | 2 | 85.00 |
| 文献[9] | BPW | D-S | 2 | 91.80 |
| 文献[24] | BPW | BA-RF | 3 | 96.70 |
| 本文 | HRV | RF | 3 | 88.63 |
| BPW | RF | 3 | 97.64 |
| HRV、BPW | RF | 3 | 98.77 |
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疲劳检测模型性能对比
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| 方案 | 特征 | 算法 | 类别 | F1/% |
| 文献[4] | HRV | RF | 2 | 91.00 |
| 文献[6] | HRV | RF | 2 | 86.36 |
| 文献[7] | HRV | SVM、KNN | 2 | 96.00 |
| 文献[16] | HRV | RF | 2 | 85.00 |
| 文献[9] | BPW | D-S | 2 | 91.80 |
| 文献[24] | BPW | BA-RF | 3 | 96.70 |
| 本文 | HRV | RF | 3 | 88.63 |
| BPW | RF | 3 | 97.64 |
| HRV、BPW | RF | 3 | 98.77 |
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