|
|
Using mobile phone in feedback rehabilitation
Mynařík, Ondřej ; Žalud, Luděk (referee) ; Chromý, Adam (advisor)
The aim of this thesis is to evaluate sensors used in Android mobile phones for measuring inclination and their comparation with precise reference sensor Xsens. Another goal is to create Android application for measuring inclination of balance desk. This application communicates with a computer by Bluetooth. Results indicates that sensors in mobile phones are sufficient enough to replace the precise sensor Xsens for measuring inclination of balance desk. Based on the results mobile application was created. Using a mobile phone with this application can replace Xsens, which results in rapid decrease of the price and the possible use in rehabilitation centers or by patients.
|
|
|
Telemetry for Dragon IV Formula
Bezdíček, Jan ; Petrlík, Jiří (referee) ; Šimek, Václav (advisor)
The aim of this master's thesis was to design and construct complete telemetry system for the student formula Dragon IV constructed for international Formula Student competition. At first, the work deals with the measurement of the physical quantities, telemetry system and automotive sensors of the formula, their mutual communication and communication with the CAN bus. It also describes the procedure of hardware design including choosing right inertial sensors and a GPS module and their using in telemetry system. The work contains materials for production of two-layer printed circuit board extending the microcomputer BeagleBone Black on the inertial sensors and the GPS module. The bigger part of the telemetry system is the firmware for hardware and software for the computer user. Both written in programming language C++ and C# are included in this work as well. This user application serves for wireless receiving data from the hardware and their showing and logging. In addition this user application can be used for wireless hardware configuration. The final product is the complete telemetry system and it is suitable for selling to end customer.
|
|
|
Recognition of vehicles using signals sensed by smartphone
Nevěčná, Leona ; Vítek, Martin (referee) ; Smíšek, Radovan (advisor)
Thanks to the development in recent years, the placement of miniaturized sensors such as accelerometers, gyroscopes, magnetometers, global positioning system receivers (GPS), microphones or others to commercially sold smartphones is increasing. Use of these sensors (which are to be found in the smartphone) for human activity recognition with health care improvement in mind is a discussed theme. Advantages of the use of smartphone for human movement monitoring lies in the fact that it is a device that the person measured carries with them and there are no additional costs. The disadvantages are a limited storage and battery. Therefore, only accelerometer, gyroscope, magnetometer, and microphone were chosen because their combination achieves best results. GPS sensor was excluded for its lack of reliability in sampling and for being energy demanding. Features were computed from the measured data and used for learning of the classification model. The highest accuracy was achieved with the use of a machine learning method called Random Forest. The main goal of this work was to create an algorithm for transportation mode recognition using signals sensed by a smartphone. The created algorithm succeeds in classification of walk, car, bus, tram, train, and bike in 97.4 % with 20 % holdout validation. When tested on a new set of data from the tenth volunteer, the resulting accuracy counted as average form classification recall for each transportation mode reached 90.49 %.
|
|
|
Automatic calibration of inercial sensors
Hamada, Vladimír ; Vágner, Martin (referee) ; Macho, Tomáš (advisor)
The main aim of this thesis is to design and build automatic calibration system for inertial measurement sensors. The calibration system is intended to support the development of devices with inertial measurement sensors. The great emphasis is placed on the configurability of system and for this reason all calculations are realized by Matlab system, which is well known by engineers. There is also presented design of inertial measurement unit, which is used as a~model sensor unit for calibration system development.
|
|
|
The MEMS sensors usability for position detection
Bobalík, Lukáš ; Sedláček, Jiří (referee) ; Žák, Jaromír (advisor)
Within this Master’s thesis, design and construction of a strapdown inertial navigation system based on MEMS sensors is described. The thesis includes theoretic analysis of physics behind determining the position of an object based on the object’s aceleration and changes in the object’s orientation in space. Included is also an overview of mathematical methods related to the position calculation.
|
|
|
Measurement of MEMS gyroscope parameter changes
Raichl, Petr ; Beneš, Petr (referee) ; Kunz, Jan (advisor)
The thesis is aimed on determination of parameters of MEMS gyroscopes with Allan variance. In the introduction, there is principle of gyroscopes described. The first part describes deterministic and stochastic parameters. Methods for determining these parameters are also described. In the practical part, stochastic parameters of two gyroscopes are determined with Allan variance. In the next part, thesis describes determination of changes of stochastic parameters after vibrations and shocks.
|
|
|
MEMS Inertial Sensor
Mihaľko, Juraj ; Rášo, Peter (referee) ; Beneš, Petr (advisor)
The aim of this master’s thesis was to describe the basic measurement methods for measurement of inertial sensor, their physical principles and errors. The next step was to select a specific parameter, then test it on a number of sensors and evaluate the results. Measurement of inertial sensors is very important for the parametrization of their errors and their subsequent mathematical model by which it is possible to minimize their impact on inertial navigation. The practical part is dedicated to the measurement of stability of the offset. Data acquisition card NI-USB 6215, which can supply two accelerometers at the same time using analog outputs, was used for data acquisition and power supply. It was tested on seven inertial sensor from four manufacturers. Two connection methods with NI-USB 6215, by whose it was determined which one is better to suppress the crosstalk between channels, were used for measurement. The NI PXI 4462 was used to verify that the NI-USB 6215 card is sufficient. The parameters for description of the changes in inertial sensors were established, transition between the initial and final value of the output measurement, variance of the values on which the sensor fixates after 72 iterations, and the fixation time of the sensor.
|
|
|
Drone construction for use in sensor technology made by 3D printing
Česák, Radim ; Skácel, Josef (referee) ; Adámek, Martin (advisor)
Goal of this term paper based od informaion gained from the internet was to design construction and then make drone with help of -3D printer, which will be used in sensor technology. In the first part term paper deals with familiarizing with problems that come with choosing parts and creating the frame in free 3-D modeling program. Second part of this work deals with practical construction of the drone, programming of its flight controller, which is ESP32 DevKit v1 and its testing.
|
|
|
Control of laboratory model of unstable balancing vehicle
Horák, Petr ; Zavadinka, Peter (referee) ; Grepl, Robert (advisor)
This diploma thesis is a part of HUMMER project. The project deals with three student’s development of two-wheeled unstable vehicle Segway type and its diminished laboratory model. This thesis deals with reviviscence of laboratory model, design of its control and realization of its actuating (a more detailed breakdown of tasks in the project is shown below). At the beginning of the work is presented reviewed study. The first part of study deals with similar models in the world, their construction and way of control. In the next part of reviewed study follows description of a real model and derivation of model basic equations, in the last part of search is given principle of operation of some used sensors. The next step was the selection and design of required electronics. In this capture are described all designed electronic modules and used sensors. There are also given parameters of used batteries and motors. The next task was the estimation of system parameters. The estimation was made by sections, in the capture is in detail described way of measuring data and structuring of estimation model. The penultimate step was design of PID and LQR controller using I/O card MF 624 and their comparing. Following thing was choice of better regulator and its implementation to the microprocessor. The last step was the realization of actuating driving of model by joystick and supreme PC.
|
|
|
Design of single-wheel mobile robot
Lochman, Vít ; Knoflíček, Radek (referee) ; Kočiš, Petr (advisor)
The diploma thesis deals with the design of a single-wheel mobile robot, which is able to jump and collect samples weighing 2 Kg. The first part is devoted to the review of single-wheel robots. A brief analysis of single-wheel motion and a brief overview of jumping mechanism follow up. The second part describes problem analysis and five design variants. Using the multicriteria analysis, the variants were evaluated, and the optimal variant was chosen. The third partm is dedicated to the dynamic calculations and the mechanical design of the robot itself. The last part is devoted to economic evaluation and discussion with possible continuation in developing. The complete drawing documentation of the robot is included in this work.
|
guest ::
