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Functional Sample of Tricycle CEDA for Pedestrian Surface Mapping

Authors:

Gotthans, T.

Type:

functional demonstrator

Date:

2018-11-20

Projects:

TH02010839 - Automated mapping routes and barriers for pedestrians and disabled people
ED2.1.00/03.0072 - Centrum senzorických, informačních a komunikačních systémů (SIX) Výzkum a Vývoj pro Inovace

A functional sample was created in cooperation with Central European Data Agency, a.s. The tricycle is equipped with a USB 2.0 camera with a 1920x1080 pixel resolution (hardware 3Mpx) and with a viewing angle of 78°. The camera has autofocus and compresses image data using the H.264 codec. Shooting speed is 30 frames per second. In addition, the vehicle is equipped with two lenses with f/2 and with a resolution of 12 Mpx. The final output image is 14 Mpix for still images. Live streaming video with 2 MP resolution at 30 fps is possible as well. For Global Positioning, a UDR (Untethered Dead Reckoning) module was built - inertial compensation in three axes of satellite navigation outages. Possibility to get location from: GPS, GLONASS, Galileo, BeiDou. It is also necessary to capture the longitudinal and transverse tilt of the vehicle (in 3 axes). It is equipped with an inertial sensor with 3D digital linear accelerometer, 3D gyro sensor and 3D magnetometer. The vehicle is able to recognize surface roughness and then perform its classification. For this purpose, a sensor is produced. It allows to classify the three-dimensional deformation of the projected laser line to the surface. Data processing is performed by the NVIDIA Jetson TX2 miniature computer, Tegra X2, the NVIDIA Pascal Graphics Core, with 256 CUDA cores and 8 GB of RAM. The computer is Ubuntu Linux for ARM64 architecture. The LiPol 14.8 V, 5800 mAh battery is on board, step-up controllers capable of operating from 8 V. It is possible to add a second battery as well. To process image from a camera, a deep neural network (based on Tiny Darknet YOLO) is programmed. An algorithm is created for segmenting image data from which extra parameters such as pavement width, column positions, hole position, or other parameters are extracted. The Wifi AP router (TL-WR702N) is connected to the minicomputer. The functional sample itself is illustrated in Figure 1.

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PLL for dual band convertor

Authors:

Záplata, F.

Type:

functional demonstrator

Date:

2018-11-09

Projects:

FEKT-S-17-4713 - Mikrovlnné technologie pro budoucí bezdrátové systémy
LO1401 - Interdisciplinární výzkum bezdrátových technologií (INWITE).

The prototype is used as a local oscillator in a low noise convertor (LNB) for satellite signal conversion from 1650 ? 1850 MHz and 7600 ? 8900 MHz bands to intermediate frequencies in range 100 ? 800 MHz. The output power up to 9 dBm allows direct driving of passive balanced mixers. The PLL is controlled by the microcontroller, which also controls the RF switch of the bands and receives control messages. The driver module injects power, provide control through serial port and separates received signals all via single coax cable.

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Testbed for Wireless Communication with High Energy Efficiency

Authors:

Aleš POVALAČ, Tomáš MIKULÁŠEK, Filip ZÁPLATA, Martin POSPÍŠIL

Type:

functional demonstrator

Date:

2018-11-07

Projects:

TH03010222 - Systém pro vzdálené řízení, správu a kontrolu ekonomiky provozu vozových parků s prioritou v odpadovém hospodářství
LO1401 - Interdisciplinární výzkum bezdrátových technologií (INWITE)

For wireless communication in beacon mode with the required battery life over 5 years, 2.4 GHz ANT technology was selected based on the Nordic Semiconductor nRF51 chipset. The testbed functional sample consists of the nRF51-DK development kit, a precision IoT current measurement kit STMicroelectronics X-NUCLEO-LPM01A, and a sample tag with integrated battery and an antenna designed to be sealed in epoxy resin. The antenna was developed with respect to the permittivity of the selected epoxy resin and verified by simulation and measurement in an anechoic chamber. The tag firmware, created for the arm-gcc and the S210 softdevice, performs the beacon transmitting identification along with the battery status and temperature periodically every second. The sample of the tag will be used to develop the prototype of the future automated fuel accounting system.

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Modular Preamplifier for Detectors of Ionising Radiation

Authors:

Král, J., Kubíček, M.

Type:

functional demonstrator

Date:

2018-11-05

Projects:

FEKT-S-17-4707 - Návrhy nových funkčních bloků a algoritmů pro moderní komunikační systémy
LO1401 - Interdisciplinární výzkum bezdrátových technologií (INWITE)

? The proposed preamplifier is dedicated to be used with ionising radiation detectors, especially with gaseous ionisation detectors and scintillation detectors accompanied by photomultiplier tubes. The preamplifier has been designed to work with both detectors without its modification and it could be connected directly to ADC inputs. We have considered two possible concepts of the preamplifier, first concept was the preamplifier with digitally controlled variable gain and second concept was the preamplifier with switchable fixed-gain stages. We have selected second concept for implementation, because of its superior noise characteristics. This amplifier has been made as a functional sample. We have successfully tested the implemented preamplifier with signal generator and a digitiser. The preamplifier is made modular to be used for designing and testing of future variants of preamplifiers for ionising radiation detectors.

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Antennas for high accuracy satellite positioning (GNSS)

Authors:

Záplata, F.

Type:

functional demonstrator

Date:

2018-06-15

Projects:

FEKT-S-17-4713 - Mikrovlnné technologie pro budoucí bezdrátové systémy
LO1401 - Interdisciplinární výzkum bezdrátových technologií (INWITE).

Antennas are intended for reception of the wideband signals from the GNSS satellites in 1575.42 MHz and 1176.45 MHz bands. The antennas are active with high gain and low noise figure (35.7dB/0.84 dB @ 1575.42 MHz a 38.9 dB/0.69 dB @ 1176.45 MHz) with capability of powering over coax.

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Development board for interconnection of packages of modular cells fabricated in I3T25 process

Authors:

Ondřej DOMANSKÝ, Roman ŠOTNER

Type:

functional demonstrator

Date:

2018-05-10

Projects:

Project: ED.2.1.00/03.0072 - Centre of Sensor, Information and Communication Systems (SIX)
LO1401 - Interdisciplinary Research of Wireless Technologies (INWITE)
FEKT-S-17-4707 ? Designs of new functional blocks and algorithms for modern communication systems

The designed development board serves for interconnection of up to four DIL28 IC packages. These ICs contain modular cells fabricated in I3T25 ON Semiconductor process for research of electronically adjustable advanced active elements for circuit synthesis and their applications. The power supply sources for ?5 V and ?1.65 V are embedded as well as high-speed amplifiers and buffers for separation of low-impedance loads (for measurement with vector network analyzer and spectrum analyzer) and the universal voltage-to-current and the current-to-voltage converters are ready to be used. Several DC voltage and current sources can be employed for adjustment of electronically controllable parameters of active elements integrated on IC. The pin headers and jumper wires can be used for interconnections of packages and cells. The application design has limit approximately up to 10 MHz.

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