scholarly journals System to Control the RF Receiver Noise Parameters of the Radiolocation Pre-Search Station P18 Laura

2020 ◽  
Vol 11 (1) ◽  
pp. 65-74
Author(s):  
Stanisław GRZYWIŃSKI ◽  
Stanisław Żygadło
Keyword(s):  
Control Unit ◽  
Measuring System ◽  
Receiver Noise ◽  
Rf Receiver ◽  
Noise Parameters

The article presents a measuring system that allows the noise parameters of the receiver of a radiolocation station to be controlled. The existing solutions of the radiolocation pre-search station P18 Laura control unit have been adapted to the system.

Research on Software Development of Flow Characteristic Measuring System of Motorcycle Electronic Injector

2014 ◽  
Vol 945-949 ◽  
pp. 1627-1631
Author(s):  
Tie Zao Yang ◽  
Hai Bo Xue ◽  
Hong Jie Zhao ◽  
Lei Yuan
Keyword(s):  
High Efficiency ◽  
Flow Characteristic ◽  
Flow Characteristics ◽  
Control Unit ◽  
Measuring System ◽  
Electronic Control ◽  
Labview Software ◽  
Electronic Control System ◽  
Injection Pulse ◽  
Motorcycle Engine

Flow characteristic of motorcycle electronic injector is one of the most important factors to determine the electronic control system design, and directly affects the accuracy of fuel control unit of the motorcycle engine. Combined with the LabVIEW software programming, the experiment on research and development of electronic injector could control the lower computer rapidly and conveniently. As well it could accurately obtain the flow characteristics of small injection pulse width and the normal one of motorcycle electronic injector. It will achieve the goal of high efficiency, fast and accurate measurement of flow characteristic of motorcycle electric injector.

scholarly journals The Influence of Selected External Factors on Temperature of Photovoltaic Modules

2019 ◽  
Vol 22 (4) ◽  
pp. 122-127 ◽  
Author(s):  
Matúš Bilčík ◽  
Monika Božiková ◽  
Martin Malínek
Keyword(s):  
Control Unit ◽  
Climatic Conditions ◽  
External Factors ◽  
Measuring System ◽  
Photovoltaic Module ◽  
Photovoltaic Modules ◽  
Fitting Procedure ◽  
Measuring Module ◽  
The Impact ◽  
Different Parts

Abstract The article deals with the impact of selected external factors on the temperature of photovoltaic module surfaces. Primary aim of this research is creation of temperature model for photovoltaic module, which would be usable under the real climatic conditions in Central Europe region. Fully autonomous measuring system was designed and created for temperature monitoring of different parts of photovoltaic modules. The measuring system consists of 24 temperature sensors, voltage inverter, control unit, transfer modules, receiver modules and temperature measuring module. The experiments were performed on photovoltaic modules installed on the roof of the University of Life Sciences in Prague during summer 2018. The temperature of photovoltaic modules significantly depends on the climatic conditions, which were monitored by the weather station. The temperature and the solar radiation dependencies for polycrystalline and monocrystalline photovoltaic modules were obtained in experiments conducted. The temperature relations were measured for different parts of photovoltaic module – active parts of photovoltaic module, frame, non-active parts of photovoltaic module, as well as ambient temperature. Final mathematical description of polynomial graphical dependencies was obtained after application of fitting procedure and regression analysis.

scholarly journals INCREASING ION SELECTIVE ELECTRODES PERFORMANCE USING NEURAL NETWORKS

2014 ◽  
pp. 17-24
Author(s):  
O. Postolache ◽  
P. Girao ◽  
M. Pereira ◽  
Helena Ramos
Keyword(s):  
Virtual Instrument ◽  
Transfer Functions ◽  
Low Cost ◽  
Multiple Input Multiple Output ◽  
Control Unit ◽  
Measuring System ◽  
Ion Selective Electrodes ◽  
Neural Processing ◽  
Data Acquisition Board ◽  
Input Multiple Output

This paper reports the implementation of a neural processing structure as a component of an intelligent measuring system that uses ion selective electrodes (ISEs) as sensing elements of heavy metal ions (Pb+2, Cd+2) concentration. The neural network (NN), designed and implemented to reduce errors due to ion interference and to pH and temperature variations, is of the multiple-input multiple-output Multilayer Percepton (MLP-NN) type. The NN is a component of a virtual instrument that includes a PC laptop, a PCMCI data acquisition board with associated conditioning circuits and the specific ISE sensors. A practical approach concerning the optimal neural processing solution (number of NN structures, number of neurons, neuron transfer functions) to increase the performance of low cost ISEs is presented. Results are presented to evaluate the performance of the NN intelligent ISE system and to discuss the possibility of transferring the acquisition and processing task to a low cost acquisition and control unit such as a microcontroller.

scholarly journals The DEPFET Mini-matrix Particle Detector

10.14311/1241 ◽  
2010 ◽  
Vol 50 (4) ◽  
Author(s):  
J. Scheirich
Keyword(s):  
Measuring System ◽  
Particle Detector ◽  
Readout Electronics ◽  
Noise Parameters ◽  
Active Pixel ◽  
New Type ◽  
Belle Ii

The DEPFET is new type of active pixel particle detector. A MOSFET is integrated in each pixel, providing the first amplification stage of the readout electronics. Excellent noise parameters are obtained with this layout. The DEPFET detector will be integrated as an inner detector in the BELLE II and ILC experiment. A flexible measuring system with a wide control cycle range and minimal noise was designed for testing small detector prototypes.Noise of 60 electrons of the equivalent input charge was achieved during the first measurements on the system.

Design of Multi-Point Temperature & Humidity Monitoring System

2014 ◽  
Vol 513-517 ◽  
pp. 3126-3129
Author(s):  
Hai Yun Li ◽  
Da Peng Ye ◽  
Hai Yong Weng ◽  
Hong Jun Hu ◽  
Wei Xu
Keyword(s):  
Industrial Production ◽  
Control Unit ◽  
Measuring System ◽  
Processing Unit ◽  
Wireless Data ◽  
Point Temperature ◽  
Temperature And Humidity ◽  
Maitake Mushroom ◽  
Micro Control Unit ◽  
Humidity Monitoring

multi-point temperature and humidity real-time measuring system for maitake mushroom cultivat-ing house is constructed by combining micro control unit (MCU), multi-sensors and personal comp-uter (PC). The sensors for measuring temperature and humidity are designed by the rational arrang-ement of DHT11 and the data will be sent to main processing unit through a wireless data transmis-sion module. This system plays important role in making big progress for the industrial production of maitake mushroom.

Video-Enhanced Microscopy--Better Visibility of Plant Cell Structures

1982 ◽  
Vol 40 ◽  
pp. 182-185
Author(s):  
N.S. Allen ◽  
R.D. Allen
Keyword(s):  
Diffraction Pattern ◽  
Theoretical Basis ◽  
Numerical Aperture ◽  
Gain Control ◽  
Control Unit ◽  
Camera Control ◽  
Variable Gain ◽  
Contrast Method ◽  
Fine Detail ◽  
Cell Structures

Various methods of video-enhanced microscopy combine TV cameras with light microscopes creating images with improved resolution, contrast and visibility of fine detail, which can be recorded rapidly and relatively inexpensively. The AVEC (Allen Video-enhanced Contrast) method avoids polarizing rectifiers, since the microscope is operated at retardations of λ/9- λ/4, where no anomaly is seen in the Airy diffraction pattern. The iris diaphram is opened fully to match the numerical aperture of the condenser to that of the objective. Under these conditions, no image can be realized either by eye or photographically. Yet the image becomes visible using the Hamamatsu C-1000-01 binary camera, if the camera control unit is equipped with variable gain control and an offset knob (which sets a clamp voltage of a D.C. restoration circuit). The theoretical basis for these improvements has been described.

High-voltage monitoring by the fiber-optic recirculating measuring system

2020 ◽  
pp. 38-44
Author(s):  
A. V. Polyakov ◽  
M. A. Ksenofontov
Keyword(s):  
Optical Fibers ◽  
High Voltage ◽  
Optical Sensors ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Electric Power Industry ◽  
Measuring System ◽  
Voltage Range ◽  
External Electromagnetic Fields ◽  
Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

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