Corona Current Data Acquisition Card Based on USB Bus in Extra High Voltage Environment

Author(s):  
Li Qi ◽  
Liu Yingyi ◽  
Lv Jianxun ◽  
Liu Yuanqing
2014 ◽  
Vol 962-965 ◽  
pp. 317-321
Author(s):  
Dang Li ◽  
Jun Lu Wang ◽  
Yong Li ◽  
Jian Hua Li ◽  
Pin Rong Lin

On the basis of the relevant identification theory of pseudo-random code signal, the signals of CSAMT are divided into three parts according to the frequency of the signal. The signals which are susceptible to 50Hz interference signal and its harmonic components should be set by pseudo-random code way. Others are set by single square waveform way. The Control and signal generation software of the transmitter system is built on the advanced virtual instrument platform, LabVIEW. The hardware of the transmitter system is mainly composed of host computer, data acquisition card, high-speed optocoupler, IGBT driver module and four IGBT switches. The data acquisition card generate PWM signals, the high-speed optocoupler isolates low-voltage part and high-voltage part. IGBT drive module and four IGBT switches constitute high-voltage part. Entire transmitter system is suitable for different environments and research tasks, the transmit frequency are adjustable, and the pseudo-random code signal has strong capability to suppress the interference signals. The control software on host computer is simple and clear. There is good prospect for the use.


2013 ◽  
Vol 706-708 ◽  
pp. 1055-1058
Author(s):  
Xian Guang Fan ◽  
Xin Wang ◽  
Yang Lu ◽  
Fan Li ◽  
Yong Zuo

For the screw’s lead precision dynamic testing needs, the hardware of the design includes two parts: the motion control card and the data acquisition card. We use the motion control card (GT200-SV) as the circular grating and long grating motor controller, and the data acquisition card is consist of FPGA and DSP. FPGA is the core device to realize the synchronous dynamic grating signal and inductive signal data acquisition and DSP is used to realize the function of decoding and communicating to PC by the USB bus protocol. Finally data are evaluated by the software on the computer. The acquisition speed of Screw’s lead precision dynamic detection system can reach 20 KHZ, and it has been successfully applied to a certain type of screw’s lead precision dynamic detection device in a company.


Author(s):  
Валентин Горин ◽  
Valentin Gorin ◽  
Николай Давидсон ◽  
Nikolay Davidson ◽  
Р. Пуриши ◽  
...  

2020 ◽  
Vol 29 (4) ◽  
pp. 461-473
Author(s):  
Joanna Witkowska-Dobrev ◽  
Anna Brzezińska ◽  
Olga Szlachetka

The paper consists of the discussion of issues related to the durability of foundations of extra high voltage (EHV) power line poles and possibilities of their renovation. The research part is the diagnostics of selected foundations of the EHV line poles (400 kV) Wielopole–Noszowice. During the on-site inspection, it was found that there are chipping and small surface defects, and in some cases losses of the reinforcement cover without visible pits. Based on the degree of damage, the scope of non-structural repairs and anti-corrosive protection was determined, presenting the next stages of their implementation.


1972 ◽  
Vol 43 (2) ◽  
pp. 230-232 ◽  
Author(s):  
George W. York ◽  
John T. Park ◽  
James J. Miskinis ◽  
David H. Crandall ◽  
Victor Pol

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