scholarly journals Development of a real-time signal processing unit for diamond detectors of ITER Vertical Neutron Camera

2021 ◽  
Vol 253 ◽  
pp. 03002
Author(s):  
Michael Zhuravlev ◽  
Grigorii Nemtcev ◽  
Nikita Nagornyi ◽  
Sergey Meshchaninov ◽  
Roman Rodionov ◽  
...  
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Phase 1 ◽  
Digital Signal ◽  
Preliminary Test ◽  
Time Signal ◽  
Processing Unit ◽  
Test Results ◽  
Operation Phase ◽  
Signal Processing Unit

CVD Diamond Detectors are going to be used in a number of neutron diagnostics of the International Thermonuclear Experimental Reactor (ITER) during its power operation phase [1]. One of such diagnostics is the Vertical Neutron Camera (VNC), which is being developed by the ITER Russian Domestic Agency (Institution “Project Center ITER”). In VNC Diamond detectors are used for real-time neutron flux and neutron spectrum measurements. In this paper we present current advancements in the development of a digital signal processing unit for the VNC diamond detector measurement channel. We give an overview of the signal properties, hardware requirements and firmware/software solutions used in the current version of the signal processing unit. We also present preliminary test results for this measurement system and explain the discovered problems and possible solutions.

Design of PowerPC-Based Radar Universal Signal Processing Unit

2013 ◽  
Vol 760-762 ◽  
pp. 1360-1363
Author(s):  
Ji Yong He ◽  
Xiang Guang Chen
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Rapid Development ◽  
Superior Performance ◽  
Radar Signal ◽  
Time Signal ◽  
Processing Unit ◽  
Complex Data ◽  
Interface Definition ◽  
Signal Processing Unit

With the rapid development of radar system, it has put forward higher requirements in the ability of real-time signal processing, the capability of data processing and the versatility of signal processing platforms. The signal processing unit based on PowerPC processor MPC8640D can complete the calculation of complex data using the superior performance of the processor. The combination of embedded operating system VxWorks can meet the real-time requirement of the radar signal processing perfectly. Universal IO interface definition of PowerPC processors make the designed signal processing unit own excellent versatility. The use of muti-beam digital synthesis technique and the vector library in software development improves the signal processing further more.

A Multi-Point Radio Displacement Measurement Method for Testing Quake-Proof Structure

2002 ◽  
Author(s):  
Atsushi Okamura ◽  
Tadashi Mikoshiba ◽  
Wataru Yosizaki ◽  
Hideki Nagai ◽  
Atsushi Mogi ◽  
...  
Keyword(s):  
Signal Processing ◽  
Measurement Method ◽  
Experimental System ◽  
Digital Signal ◽  
Reference Points ◽  
Displacement Measurement ◽  
Shaking Table ◽  
Processing Unit ◽  
Signal Processing Unit ◽  
Phase Differences

In this paper, we propose a remote 3-D displacement measurement method using the radio wave for indoor shaking table facilities. It also shows the effectiveness of the proposed method by some radio experiments using a shaking table. The proposed measurement system consists of simple transmitters attached to each reference point and several receiving antennas at different places connected with a digital signal processing unit. The locations of the transmitters are simultaneously estimated by observing the phase differences between signals at receiving antennas. This prototype radio experimental system consists of 3 transmitters of frequency 2.45GHz, 4 receiving antennas and a microcomputer. We made the demonstration for the reconstructions of the 0.1Hz and 2Hz sinusoidal excitations at 3 reference points of the testing structure on the shaking table. The accuracy of estimated displacement was several centi-meters to several mili-meters.

TIME-DOMAIN INTERPOLATION ON GRAPHICS PROCESSING UNIT

2011 ◽  
Vol 04 (01) ◽  
pp. 89-95 ◽  
Author(s):  
XIQI LI ◽  
GUOHUA SHI ◽  
YUDONG ZHANG
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Time Domain ◽  
Processing Time ◽  
Graphics Processing Unit ◽  
Interpolation Method ◽  
Time Signal ◽  
Processing Unit ◽  
Graphics Processing ◽  
Sd Oct

The signal processing speed of spectral domain optical coherence tomography (SD-OCT) has become a bottleneck in a lot of medical applications. Recently, a time-domain interpolation method was proposed. This method can get better signal-to-noise ratio (SNR) but much-reduced signal processing time in SD-OCT data processing as compared with the commonly used zero-padding interpolation method. Additionally, the resampled data can be obtained by a few data and coefficients in the cutoff window. Thus, a lot of interpolations can be performed simultaneously. So, this interpolation method is suitable for parallel computing. By using graphics processing unit (GPU) and the compute unified device architecture (CUDA) program model, time-domain interpolation can be accelerated significantly. The computing capability can be achieved more than 250,000 A-lines, 200,000 A-lines, and 160,000 A-lines in a second for 2,048 pixel OCT when the cutoff length is L = 11, L = 21, and L = 31, respectively. A frame SD-OCT data (400A-lines × 2,048 pixel per line) is acquired and processed on GPU in real time. The results show that signal processing time of SD-OCT can be finished in 6.223 ms when the cutoff length L = 21, which is much faster than that on central processing unit (CPU). Real-time signal processing of acquired data can be realized.

Digital Analyzer of Diamond Detector Signals for ITER Vertical Neutron Camera

2014 ◽  
Vol 9 (3) ◽  
pp. 11-19
Author(s):  
Petr Zubarev ◽  
Svetlana Ivanenko ◽  
Alina Ivanova ◽  
Andrey Kvashnin ◽  
Aleksandr Kotelnikov ◽  
...  
Keyword(s):  
Signal Processing ◽  
Energy Spectrum ◽  
Digital Signal Processing ◽  
Digital Signal ◽  
Processing Unit ◽  
Diamond Detector ◽  
Pile Up ◽  
Digital Analyzer ◽  
Signal Processing Unit

In this paper, digital analyzer of diamond detector signals of ITER Vertical Neutron Camera (ITER VNC) are described, which uses digital signal processing. Digital analyzer of pulse signals is based on ADC12500PXIe (two channels, 12 bit, 500 MHz, PXI Express), which satisfies the ITER VNC requirements. In this paper, the architecture of digital signal processing unit is given. Trapezoidal digital shaper for pile-up separation and energy spectrum unit are described. In addition, structure of digital analyzer software levels are considered

Design and Performance Testing of Proportioning Weighing Instrument Based on Position PID

2013 ◽  
Vol 433-435 ◽  
pp. 821-824
Author(s):  
Ding Han ◽  
Cai Xia Xue ◽  
Zhi Weng ◽  
Li Hong Li
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Performance Testing ◽  
Processing Unit ◽  
Coking Coal ◽  
Dead Band ◽  
Real Time Clock ◽  
Integral Separation ◽  
And Performance ◽  
Signal Processing Unit

To accomplish the requirement of Coking Coal Company, we design proportioning belt weighing [1] and its instrument; it also can be used in metallurgy and material industries. The instrument controller is comprised of microcontroller, signal processing unit, shaping circuit, real time clock and so on, its program arithmetic adopt integral separation position PID with dead band .the whole proportioning weighing instrument can not only show accumulative value but also adjust the quantity of instantaneous materials. Last, the result of experiment meet fully the GB/T 7724-1999 standard for the proportioning belt weighting instrument displaying controller requirements.

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