Three WMS4 sensors

Wearable motion sensor

It is always with you to record your physical activity. The device, although still in development, already has some interesting applications.

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What Is It?

Our wearable motion sensor tracks and records movements. It is very easy to use, just attach it to the object you want to track. An example: you can use it to measure arm movements by attaching it to the arm using a bracelet.

The sensor contains a 3D accelerometer, a 3D gyroscope and a 3D compass. It communicates with other sensors or a computer wirelessly.

It is an inertial measurement unit (IMU), i.e. a sensor measuring its own acceleration and rotation to compute its position change. This way the unit is completely independent on its surroundings. It does not need any beacons or satellites, it works everywhere.

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Phill with a headband

Vertigo Diagnostics

We are working on a unique diagnostic aid in cooperation with doc. MUDr. Jaroslav Jeřábek, CSc. from Neuro-otologic center of the Charles University and Motol University Hospital. It’s a “headband” displaying the accuracy of Semont and Epley maneuver.

Benign paroxysmal positional vertigo is a neurological disorder that represent the single most often cause of a vertigo.

The headband communicates with the computer that displays up-to-date information on the maneuver being performed. A significant deviation form a reference trajectory is announced by a sound signal.

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Medical Rehabilitation Support

We participated in a study on patient rehabilitation after a stroke. The authors were Department of Rehabilitation Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague. The aim of the study were patients with hindered locomotion of the upper arm.

The study compares activity of affected and unaffected arm based on three different criteria.

The goal of the study was to compare affected and unaffected arm. We used three sensors to record activities of one patient. Two in the form of an armband and one attached to a belt. The system we developed is able to determine whether a detected activity is a result of a movement of an arm or of the whole body (like walking or driving).
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Rehabilitation – Illustrative photo
Data Visualization

Epileptic Seizure Detection

Epileptic seizures happen mostly to children and appear suddenly and unexpectedly. A system we currently develop detects the seizures and raises an alarm. Our first goal is to develop an appliance detecting a seizure during sleeping periods.

We work on a detector for hospital and domestic use.

The system is currently in development.
The image on the left represents a visualization of one of our detection algorithm.


Technology for Your Research

Are you interested in using our sensor for your project? Please, do not hesitate to contact us! We have created a lot of programs for evaluation and processing of data from our sensors. We might already have some experience in your research area or a solution that you might use. We are interested in what you might want to use or sensor for as well as in cooperation with us.

Think about whether our sensors might give you the raw data you need for your project.

Technical specification can be found in the leaflet.

WMS4 Printed Circuit Board
Engineer's Cup

Support and Download

Check technical specification, documentation, support applications and firmware updates in our download zone. Manual shows sensors handling in details.

See Details

Available documents provides a technical specification and should answer more detailed questions. In case of any more questions, please, do not hesitate to contact us at


Supported by

Project: Development of rehabilitation and diagnostics aids using 3D movement analysis


Our project is supported by Technology Agency of the Czech Republic since 2013.