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This paper presents a versatile implementation of a reconfigurable module for acquisition and synthesis of modulated signals that are specific to the modern communication equipments. The hardware structure of the system is elaborated mainly around the TDA 8702 high speed video digital-to-analog converter and ADC 0820 analog-to-digital converter, both connected in a configuration that is controlled...
This paper presents an enhanced conditioning and transmission unit aimed for interfacing resistive bridge sensors with remote data acquisition and control systems. The proposed module uses a simple but reliable communication technique based on a combination between frequency and pulse width modulations. This design, based on two transmission methods, ensures the multiplexing on a single carrier of...
In this paper are presented the results regarding the simulation and the implementation of an enhanced communication interface based on pulse position modulation technique. The proposed module is aimed for integration in the conditioning circuits of the sensors that are connected to data acquisition systems which require transmission of information signals over short to moderate distances. Because...
In this paper is presented a new approach for implementing a versatile temperature control and monitoring system for thermal enclosures based on Peltier thermoelectric elements. The system is intended to be used for temperature testing of equipped or unequipped electronic printed circuit boards (PCB). These types of tests regarding thermal aging and endurance are very important for verifying the long...
In this paper are presented the results regarding the implementation of a communication interface dedicated for conditioning and remote transmission of measurement signals acquired from sound and vibration sensors. The interface contains two parts, an analog section, responsible with long distance signal transmission and a digital section that realize demodulation and analog-to-digital conversion...
This paper approaches the problem of implementing an experimental module that facilitates the teaching and learning of the Braille alphabet. The proposed system follows to improve the existing assistive technologies dedicated for helping visually impaired peoples. The main board of the experimental module is realized around the PIC 16F877A microcontroller that runs a proprietary software application...
This article presents the implementation of a novel architecture of a specialized measurement and control system that is intended to be integrated in a complex automation system for buildings. The proposed design is realized around Atmega 328 microcontroller embedded on Arduino Uno development board. For indoor environmental monitoring are used different sensors associated with various physical quantities...
In this paper are presented the results regarding the design and the implementation of a efficient delta encoder that is intended to be used for conditioning of signals from analogue sensors. In addition is proposed a dedicate circuit architecture for transmission of digitally encoded signals from sensors to remote measurement systems using a very reliable communication media that is represented by...
In this paper are presented the results regarding the implementation and testing of a novel type of remote control based on the data transmission facilities offered by the GSM network infrastructure and the processing power achieved by new generation of microcontrollers. The system is intended to be used in the development of complex distributed control applications that are specific to various automated...
In this article is presented the implementation of a new type of reconfigurable signal generator and simulator used for testing digital transmission circuits that requires complex modulated waveforms. In our experiments we choose as an example the quadrature amplitude modulation or quadrature phase shift keying (QAM/QPSK) signals. The proposed solution is based on a high-speed NI-USB-6251Mdata acquisition...
This paper presents an application used in educational laboratory for multiple waveform measurement and display, for analysing of the operation of electronically circuits. It was implemented as virtual instrument in LabVIEW and uses a data acquisition card for electrical signals acquisition. The application can be used in educational laboratory for multiple signals measurement, record and time correlated...
This paper presents an application for generating of all the signals in case of digital televisions corresponding to standard colour bar patterns, from primary RGB signals to YCbCr colour space digital signals. It was implemented in LabVIEW and can represents D1 and D2 format for DTV signals on 8 and 10 bits resolution. The application can be used for DTV signals teaching and analysing in case of...
In this paper is presented a new approach for implementing a position control system based on a directional flux of air. The accurate control of the position for the levitating object is achieved using the variable pressure of a fluid, which in this case is air. The feedback loop of the control system is composed of a video camera that monitor the object's position and a data acquisition module that...
This paper presents an application for simulation and generation of signals from semiconductor radiation detectors which can be used in testing and calibrating of the processing circuitry within radiation measurement apparatus. The proposed application acts as a virtual semiconductor radiation sensor, generating the specific pulse signals delivered by the sensor processing circuitry in case of a radiation...
In this paper is presented an angular positioning system based on stepper motors and remotely controlled using a wireless communication link. The wireless control system is intended to be used in a wide range of applications including the robotic arm positioning, automatic orientation of photovoltaic panels, video cameras or antennas. The proposed design is compose by two modules (transmission/reception)...
In this paper is presented the design and the implementation of an innovative control system intended to be used in displays consisting in a rotating bar with multiplexed array of light emitting diodes (LEDs). The operation of the proposed system is based on persistence of vision phenomenon that is specific to the human eyes. This approach allows achieving a higher equivalent resolution in displaying...
In this paper are presented the results obtained in the design and implementation of an improved communication module intended to be used in a remote measurement and data acquisition system that operate in industrial environments. The module is composed by two sections, a digital modulator and a synchronous demodulator with carrier recovered from the incoming data stream. The proposed module can realize...
This paper is focused on the design and implementation of a reliable data acquisition system that is intended to be used in automobile collision testing. In our implementation the proposed system receive the input signals from three types of sensors: accelerometers, displacement sensors and angular velocity sensors. The system is composed by a conditioning unit and a multichannel data acquisition...
This paper presents some aspects regarding the design and implementation of readout electronics suitable for PIN diode radiation detector, for nuclear safety and active personal dosimetry applications. Our efforts consist in designing and fabricating the electronics to fulfil the needs of gamma radiations dosimetry and hybrids PIN diode array for charged particle detectors. In this paper we focus...
In this paper is presented an innovative design and the practical implementation of a communication circuit intended to be used for long distances transmission of the signals from sensors. The circuit is suitable for integration within the conditioning modules that are used for processing of signals from sensors that are connected to remote data acquisition systems. Regarding his structure, the proposed...
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