Fetal Movement Detection Dataset Recorded Using MPU9250 Tri-Axial Accelerometer

Experimental paradigm
This data set consists of Tri-axial accelerometer measurements of fetal movement from 13 subjects. This data set consists of three different classes, namely mother’s laugh (class 1), mother’s respiratory movements (class 2) and fetal movements (class 3). A single session was recorded for each subject. Each session lasted for approximately 10 to 20 minutes.
Initially the subject was requested to fill out the following form.
1. Subject’s age : ………………………………………………………
2. Fetal age : ………………………………………………………
3. Gender of the fetal : ………………………………………………………
4. Number of previous pregnancies : ………………………………………
5. Other : ………………………………………………………

At the beginning of each session the sensor was fixed and the subject was instructed to settle in to a comfortable position. She was then instructed to press the corresponding button on the device when she feel a fetal movement. And the button corresponding to mother’s laugh was pressed by an experimenter.

Data recording
MPU 9250(a Tri-axial accelerometer) was used to record data. It has an inbuilt 3-axis accelerometer and a 3-axis gyroscope. The MPU 9250 is a passive device which measures the fetal vibration incident on the maternal abdomen. This is used considering the health benefits of the mother and the baby. The signal was sampled at 280Hz. All the data was recorded and transferred to a PC.

实验范式
本数据集收录了来自13名受试者的胎儿运动三轴加速度计测量数据。该数据集包含三个不同的类别，即母亲的笑声（类别1）、母亲的呼吸运动（类别2）以及胎儿运动（类别3）。每位受试者仅记录了一次会话，每次会话持续约10至20分钟。
在会话开始之前，受试者被要求填写以下表格。
1. 受试者年龄：……………………………………………………
2. 胎儿年龄：……………………………………………………
3. 胎儿的性别：……………………………………………………
4. 前妊娠次数：…………………………………………………………………………
5. 其他：……………………………………………………

每个会话开始时，传感器被固定，并指导受试者调整至舒适的姿势。随后，当受试者感觉到胎儿运动时，她需按下设备上的相应按钮。而与母亲笑声对应的按钮则由实验者操作。

数据记录
实验中使用了MPU 9250（三轴加速度计）来记录数据。该设备内置了三轴加速度计和三轴陀螺仪。MPU 9250是一款被动设备，用于测量作用于母腹部的胎儿振动。考虑到母亲和婴儿的健康益处，选择了该设备。信号采样频率为280Hz。所有数据均被记录并传输至个人电脑。