MATRIX ACTIVITY MONITOR

FUNCTIONALITY

Innovation product, recently developed, designed for research environments, primarily used for recording and analyzing biomechanical and physiological data. It can gather information on:

Body movements and postures
Sleep
Body temperature
Ambient temperature
Heart rate and its variability

WHO IS USING IT?

It is being used for the assessment of behaviors and physiological parameters in epidemiological studies in:

Spain: The Ministry of Health is currently using it in the IMPaCT cohort, where 200,000 people from all over Spain will be assessed (https://cohorte-impact.es).

Spain: The WearablePerMed project (link) aims to make the Spanish National Health System a global pioneer in the use of wearables in medical care, bringing together multidisciplinary efforts from doctors, mathematicians, engineers, nurses, and sports science specialists from six different universities.

China: The CHARLS study (https://charls.pku.edu.cn/en/), managed by Peking University, is using it to assess its 17,500 participants distributed in 10,000 households, 150 districts, and 450 villages throughout China.

TECHNICAL FEATURES

Triaxial accelerometer and gyroscope with a range of ±16 g, 16-bit signal resolution, break tolerance up to 2000 g, and factory calibration. It includes sensors for ambient temperature with an accuracy of 1°C, body temperature with an accuracy of 0.1°C, and a photoplethysmograph with 3 green LED lights with an accuracy of 25 Hz. The device has a 200 mAh battery capacity with wireless charging and 512 MB of memory. The device (accelerometer and sensors) comes in a watch format with an adjustable silicone sports strap, maintaining a water resistance of up to 50 meters. Connection to the computer is done through USB, and data from each sensor are downloaded in Excel format for further analysis. It has a CE certificate according to the Directives 2011/65/EU and amendment 2015/863 of the European Union.

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Technical Specifications

The Matrix activity monitor incorporates the latest technology in biosensors and algorithms:

Microprocessor: The microprocessor serves as the brain of the Matrix 003 monitor, commanding and coordinating each module to perform measurement tasks in an orderly manner. This product adopts a powerful microprocessor suitable for high-speed data acquisition and multi-threaded data acquisition. Additionally, the processor features a robust DSP data processing unit, capable of complex filtering operations and interference elimination, enhancing data precision.
Battery and Flash Memory: It includes a 200 mAh battery with wireless charging and 512 Mb of flash memory.
Nine-axis motion sensor: Factory calibrated, this tiny sensor incorporates a triaxial accelerometer and gyroscope, approximately the size of a rice grain. The high-precision 16-bit sensor is used not only to measure acceleration in the x, y, and z directions but also to measure angular velocity and geomagnetic signals in the x, y, and z directions. Through changes in acceleration, angular velocity, and geomagnetic signal, the amplitude and direction of movement can be accurately determined. The motion sensor can be configured with a sampling frequency for custom sampling, allowing for lower battery consumption in slow-motion scenarios. For fast-motion scenarios, a higher sampling frequency can be used, providing more detailed movement information, ensuring no action changes are missed. Compared to a three-axis accelerometer, the nine-axis sensor can also measure angular velocity and geomagnetic signals, characterizing changes in movement direction and accurately tracking movement trajectories, offering more detailed, unfiltered original data.
Temperature sensors: The product is equipped with two temperature sensors. One measures external ambient temperature (accuracy 1°C), while the other measures wrist skin temperature (accuracy 0.1°C).
Heart rate sensor: The product integrates a heart rate sensor, which is a three-green LED photoplethysmograph with 25 Hz accuracy. This sensor enables the extraction of heart rate values after complex algorithmic filtering. The heart rate value can effectively assess the watch's usage condition and evaluate the user's movement intensity in real-time. The combination of temperature data, heart rate data, and acceleration data holds high research value for assessing movement conditions.
Design and Safety: The product features a metal frame with tempered glass surface, presenting an elegant watch-like appearance. It has a break tolerance of up to 2000 g and is water-resistant up to 50 meters deep.
Strap Design: The porous human-grade silicone strap is soft, breathable, elastic, comfortable for prolonged wear.
QR Code: Each monitor's QR code is easy to read and corresponds to a unique identifier (no two are the same). The QR code for each watch corresponds to the Bluetooth name, preventing confusion in Bluetooth connections between multiple watches. The two-dimensional codes and numbers are laser-engraved beneath the glass surface to prevent scratching and becoming unrecognizable.
Magnetic Attraction and Electrical Charge/Discharge: Compared to the mini-USB interface, magnetic adsorption and electrical charge/discharge contact offer better sealing performance, water and dust resistance, do not compromise the integrity and aesthetic feel of the appearance, and provide more stable data transmission.
APP: A specific Android APP is included, allowing control of the Matrix monitor, and data download is easily done via USB to a PC.
CE Certification: Certified according to the Directives 2011/65/EU and amendment 2015/863 of the European Union.