BI-Vital: Bielefeld Vital Monitoring

The body sensor BI-Vital (Bielefeld vital monitoring) developed by the work group Cognitronics and Sensor Systems affects several projects. The miniaturized wireless sensor node is used to measure physiological and kinematic values on the body of the respective user. The BI-Vital system includes specially developed software. With this software the measured values can be analyzed and additionally visualized directly via wireless communication on the PC.

The BI-Vital body sensor is a miniaturized wireless sensor node (dimensions: 3.1 x 6.1 cm, weight: 14 g). It is a complete in-house development with full access to electronics, housing, software and data. The sensor node is suitable for the acquisition and analysis of physiological, kinematic and environmental data in sports as well as in work and everyday life. 

The analog sensors record a 1-channel ECG and breathing activity. A digital inertial measurement unit with acceleration sensor, gyroscope and magnetometer is also integrated. In addition, sensors are available for recording environmental parameters, i.e. temperature, humidity, air pressure and sound pressure level. In addition to raw data acquisition, various derived parameters are determined from the measured values. These include the heart rate and its variability, the respiration rate, acceleration, orientation and posture of the upper body. The readings are used for advanced analysis using machine learning models. These allow to calculate the number of steps taken, the current walking speed, predict the identity of the wearer or estimate the physical activity level.

All measurement data can be stored internally on the module with high temporal resolution (100 Hz) for up to 12 hours. At the same time it is possible to transfer the measurement data wirelessly to a PC, tablet or smartphone (Proprietary or Bluetooth Low Energy). The operating time of the sensor is up to 24 hours.

With the BI-Vital sensor, performance diagnostic data of athletes during training or competition can be directly measured for almost all sports. The data does not have to be collected in the laboratoryis and is immediately available to sports scientists and coaches. Trainers and sports scientists are thus enabled to document the current performance status. This makes it possible to present the actual requirement profile of game and ball sports in competition and to incorporate the findings into an individual training design.



Dipl.-Ing. Marc Hesse