Biometric sensor and smartwatch response data collected during VR user studies for Worker Safety III

Two related datasets are included documenting users' sensor data and responses to alarms on a smartwatch during virtrual reality (VR) worker safety experiments on an integrated traffic simulation and VR platform. watchData.csv records the times at which the user received an alarm on an Apple Watch and times when they tapped the watch screen to acknowledge the alarm. HRData.csv records blood volume pulse (BVP), inter-beat interval (IBI), and heart rate (HR) data for each user Data was recorded using an Empatica E4 PPG (photoplethysmography) wristband. Both csv files shared the same column headers with the following descriptions: UserID - Each user has a unique 4 digit ID randomly assigned to them at their first VR experiment. Scenario - Indicates which work zone safety Scenario the user experienced. Scenario 1: Placing cones in a mobile work zone Scenario 2: Sensor installation on highway Scenario 3: Surveying in urban intersections Trial - Indicates how many times they have experienced the same VR scenario (i.e. Scenario 3, Trial 2 means the user is experiencing Scenario 3 for the second time) VibrationOnly - Indicates the modality of alarms the user received during the trial. VibrationOnly = 1 indicates that the alarms were haptic/vibrations only. VibrationOnly = 0 indicates that the alarms were haptic/vibrations AND sounds. Timestamp - Local timestamp of the data recording Time Elapsed - Time that has passed since the start of the trial From - Indicates the source of the data From = PPG - indicates the data is from the heart rate sensor From = Watch - indicates the data is from the Apple smartwatch, generally applies to when the user has responded on the watch/acknowledged the watch alarm From = VR - indicates the data is from the traffic simulation, generally applies to when speeding/collision cars trigger an alarm on the Apple smartwatch From = Ultrasonic - indicates the data is from an ultrasonic sensor detecting when the user was on the edge of the work zone perimeter. Event - indicates the event being recorded BVP/IBI/HR - indicates the meaning of the three numbers in the Values column (see Values below) Start Simulation - indicates when the trial began Received car approaching alert, mode=x, id=xxx Mode indicates the type of alarm duration, frequency, and number of repetitions. ID indicates the cause of the alarm Type - indicates additional categorizations of events Speeding/Collision - indicates the alarm was caused by a speeding or collision car Perimeter - indicates the alarm was triggered when the user was on the edge of the work zone perimeter. Response - indicates the user responded/acknowledged the alarm on the smartwatch by tapping the watch screen. BVP/IBI/HR - indicates the meaning of the three numbers in the Values column (see Values below) Values For Type=Response, Values indicates the alarm id the user responded to. Response time has to be calculated by subtracting the Time Elapsed of the Response row with the corresponding Time Elapsed of the alarm id row For Type="Received...", Values indicates the alarm mode and id For Type=BVP/IBI/HR, three values are listed indicating respectively blood volume pulse (BVP), inter-beat interval (IBI), and heart rate (HR) data Data requests and inquiries can be made by contacting Dr. Semiha Ergan at [e-mail]

本数据集包含两份关联数据集，记录了在集成交通仿真与虚拟现实（Virtual Reality，VR）平台上开展的VR工人安全实验期间，用户的传感器数据及其对智能手表警报的响应情况。其中，watchData.csv 记录了用户在Apple Watch上接收警报，以及轻点手表屏幕确认警报的时间点；HRData.csv 则记录了每位用户的血容量脉冲（blood volume pulse, BVP）、心搏间期（inter-beat interval, IBI）与心率（heart rate, HR）数据，该类数据通过Empatica E4光电容积描记法（photoplethysmography, PPG）腕带采集。两份CSV文件共享相同的列标题，各列含义说明如下：1. UserID：每位用户均拥有唯一的4位数字ID，该ID在其首次参与VR实验时随机分配。2. Scenario：标识用户所经历的作业区安全场景，具体包括：场景1：在移动作业区内放置路锥；场景2：在高速公路开展传感器安装作业；场景3：在城市路口进行勘测工作。3. Trial：标识用户重复参与同一VR场景的次数（例如，Scenario 3, Trial 2即代表用户第二次参与场景3的实验）。4. VibrationOnly：标识本次实验期间用户接收警报的模态。当VibrationOnly=1时，警报仅采用触觉/振动形式；当VibrationOnly=0时，警报同时包含触觉/振动与声音两种形式。5. Timestamp：数据记录的本地时间戳。6. Time Elapsed：自本次实验开始起流逝的时长。7. From：标识数据来源，各取值含义如下：- From=PPG：数据来自心率传感器；- From=Watch：数据来自Apple智能手表，通常对应用户在手表上完成响应或确认手表警报的场景；- From=VR：数据来自交通仿真平台，通常对应超速/碰撞车辆触发Apple Watch警报的场景；- From=Ultrasonic：数据来自超声波传感器，用于检测用户是否处于作业区边界区域。8. Event：标识当前记录的事件类型，具体包括：- BVP/IBI/HR：用于说明Values列中三个数值的含义（详见下文Values说明）；- Start Simulation：标识本次实验的开始时刻；- Received car approaching alert, mode=x, id=xxx：标识用户接收到车辆接近警报，其中mode表示警报的类型（包含持续时长、频率与重复次数），id表示警报的触发原因。9. Type：用于对事件进行额外分类，各取值含义如下：- Speeding/Collision：警报由超速或碰撞的车辆触发；- Perimeter：警报在用户处于作业区边界区域时触发；- Response：标识用户通过轻点手表屏幕在智能手表上确认并响应警报；- BVP/IBI/HR：再次用于说明Values列中三个数值的含义（详见下文Values说明）。10. Values：不同Type下该字段的含义如下：- 当Type=Response时，Values表示用户所响应的警报ID，响应时长可通过将该响应行的Time Elapsed值减去对应警报ID行的Time Elapsed值计算得到；- 当Type="Received..."时，Values表示警报的模态与ID；- 当Type=BVP/IBI/HR时，列中包含三个数值，依次对应血容量脉冲（BVP）、心搏间期（IBI）与心率（HR）数据。如需申请使用该数据集或进行相关咨询，请联系Semiha Ergan博士，邮箱地址为[e-mail]