A dead-time correction system for gamma-ray spectrometry of short-lived isotopes

1972 ◽  
Vol 103 (1) ◽  
pp. 45-47 ◽  
Author(s):  
J. Bartošek ◽  
F. Adams ◽  
J. Hoste
Keyword(s):  
Gamma Ray ◽  
Dead Time ◽  
Gamma Ray Spectrometry ◽  
Dead Time Correction ◽  
Time Correction ◽  
Correction System

Development of Algorithms and Their Hardware Implementation for Gamma Radiation Spectrometry

2016 ◽  
pp. 17-41
Author(s):  
Imbaby Ismail Mahmoud ◽  
Mohamed S. El Tokhy
Keyword(s):  
Hardware Implementation ◽  
Gamma Ray ◽  
Resolution Enhancement ◽  
Gamma Ray Spectrometry ◽  
Dead Time Correction ◽  
Input Signals ◽  
Portable Instruments ◽  
Time Correction ◽  
Spectrum Evaluation ◽  
Coincidence Summing

The chapter describes how to develop algorithms for Gamma ray spectrometry portable instruments and then to implement them on FPGA devices as hardware platform. At first we consider the development of more accurate spectrum evaluation programs including pileup detection and recovery, dead time correction, coincidence summing and resolution enhancement algorithms which are implemented in MATLAB. The input signals are obtained through experimental setup or simulated model. Four different approaches are studied and evaluated for peak pileup problem within a spectroscopy system. In addition, x-ray spectrum evaluation enhancements are carried out and several algorithms are developed and compared. Hardware implementation using Xilinx DSP Boards as well as further improvements and modifications are discussed.

scholarly journals Comprehensive SPECT/CT system characterization and calibration for 177Lu quantitative SPECT (QSPECT) with dead-time correction

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Andrea Frezza ◽  
Corentin Desport ◽  
Carlos Uribe ◽  
Wei Zhao ◽  
Anna Celler ◽  
...  
Keyword(s):  
Dead Time ◽  
Dead Time Correction ◽  
Quantitative Spect ◽  
System Characterization ◽  
Time Correction ◽  
Ct System

scholarly journals Dead-Time Correction Applied for Extended Flux-Based Sensorless Control of Assisted PMSMs in Electric Vehicles

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 220
Author(s):  
Cheng Lin ◽  
Jilei Xing ◽  
Xingming Zhuang
Keyword(s):  
Control System ◽  
Electric Vehicles ◽  
Dead Time ◽  
Sensorless Control ◽  
Correction Method ◽  
Time Effect ◽  
Dead Time Correction ◽  
Speed Range ◽  
Time Correction ◽  
The Dead

Sensorless control technology of PMSMs is of great importance for safety and reliability in electric vehicles. Among all existing methods, only the extended flux-based method has great performance over all speed range. However, the accuracy and reliability of the extended flux rotor position observer are greatly affected by the dead-time effect. In this paper, the extended flux-based observer is adopted to develop a sensorless control system. The influence of dead-time effect on the observer is analyzed and a dead-time correction method is specially designed to guarantee the reliability of the whole control system. A comparison of estimation precision among the extended flux-based method, the electromotive force (EMF)-based method and the high frequency signal injection method is given by simulations. The performance of the proposed sensorless control system is verified by experiments. The experimental results show that the proposed extended flux-based sensorless control system with dead-time correction has satisfactory performance over full speed range in both loaded and non-loaded situations. The estimation error of rotor speed is within 4% in all working conditions. The dead-time correction method improves the reliability of the control system effectively.

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