A microprocessor-based precision three-channel high-speed frequency meter with a zero dead time

2007 ◽  
Vol 50 (2) ◽  
pp. 215-220 ◽  
Author(s):  
A. M. Goncharenko ◽  
V. A. Zhmud’ ◽  
A. A. Voevoda ◽  
S. A. Avilov
Keyword(s):  
High Speed ◽  
Dead Time ◽  
Frequency Meter

A High-Speed Signal Processor Using a Digital Divider for Position Sensitive Proportional Counters

1980 ◽  
Vol 24 ◽  
pp. 173-176
Author(s):  
S. Kobashi ◽  
K. Mochiki ◽  
K. Hasegawa ◽  
A. Sekiguchi ◽  
H. Hashizume ◽  
...  
Keyword(s):  
High Speed ◽  
Dead Time ◽  
Present System ◽  
X Ray Diffraction ◽  
Analog To Digital ◽  
X Ray ◽  
System A ◽  
Proportional Counters ◽  
Position Sensitive ◽  
A Charge

Most position sensitive proportional counters (PSPCs) currently used in X-ray diffraction experiments have a dead time longer than 5 μs. Though such PSPCs are useful in measuring weak diffraction diagrams, a faster counter is needed to detect strong X-ray diagrams produced with synchrotron radiation sources. The long dead time of PSPCs using a charge division position read-out is due to the slow analog division circuit plus analog-to-digital converter employed in the present system. A fast processor can be built utilising two high-speed ADCs to digitize voltage signals from the detector, followed by a digital divider to compute position of detected photons. The present paper describes the design of such a processor and some preliminary testings of its performances.

Dynamic PIV Measurement of High-Speed Mist Flow

2004 ◽  
Author(s):  
Masaaki Ishikawa ◽  
Seong-Dae Hong ◽  
Koji Okamoto ◽  
Haruki Madarame
Keyword(s):  
High Speed ◽  
Dead Time ◽  
High Repetition Rate ◽  
Frame Rate ◽  
Particle Image Velocimetry System ◽  
High Speed Flow ◽  
Camera System ◽  
Speed Flow ◽  
Piv Measurement ◽  
Dynamic Piv

Recently PIV (Particle Image Velocimetry) system which consists of high-speed cameras with 1k × 1k pixels and 2 kHz in frame rate and high-repetition rate and high-power double-pulse lasers has been developed. Previous PIV system is difficult to visualize the sequential instantaneous images in high-speed flow because of low frame rate as 30Hz and was used to apply to periodic flow and steady flow. According to this latest PIV system, it is possible to acquire high-speed flow of 1 msec consecutively. This camera system is called “Dynamic PIV system” or “High-Speed PIV system”. Also in PIV it is possible to capture two-consecutive images for about a micro-second to use the frame straddling technique. But in latest high-speed camera it has limitation because dead time which is to flush the charged electron perfectly is longer and it has a several micro-seconds. This purpose of study is to develop the new Dynamic PIV system which is possible to capture the two-consecutive images for less than dead time. Furthermore it is applied to the high-speed mist jet flow with 50m/s in order to elucidate this system.

A Novel High-Speed Photon Counting System with Programmed Dead Time

2019 ◽  
Author(s):  
Fei Yuan ◽  
Xiao-Long Lu ◽  
Li Jing ◽  
Yun-Xiu Yang ◽  
Fan-Lin Kong ◽  
...  
Keyword(s):  
High Speed ◽  
Dead Time ◽  
Photon Counting ◽  
Counting System

scholarly journals Detector dead-time effects and paralyzability in high-speed quantum key distribution

2007 ◽  
Vol 9 (9) ◽  
pp. 319-319 ◽  
Author(s):  
Daniel J Rogers ◽  
Joshua C Bienfang ◽  
Anastase Nakassis ◽  
Hai Xu ◽  
Charles W Clark
Keyword(s):  
Quantum Key Distribution ◽  
High Speed ◽  
Dead Time ◽  
Key Distribution ◽  
Time Effects

scholarly journals High speed DC-DC dead time architecture

2015 ◽  
Vol 12 (19) ◽  
pp. 20150662-20150662 ◽  
Author(s):  
Jani Järvenhaara ◽  
Hans Herzog ◽  
Sami Sipilä ◽  
Jing Tian ◽  
Igor M. Filanovsky ◽  
...  
Keyword(s):  
High Speed ◽  
Dead Time

Feedback Control of Braking Deceleration on Railway Vehicle

2005 ◽  
Vol 128 (2) ◽  
pp. 244-250 ◽  
Author(s):  
Masanobu Nankyo ◽  
Tadashi Ishihara ◽  
Hikaru Inooka
Keyword(s):  
Tracking Control ◽  
High Speed ◽  
Dead Time ◽  
Design Method ◽  
Control Device ◽  
Railway Vehicle ◽  
Control Technology ◽  
Control Methods ◽  
Control Performance ◽  
Brake Force

An increase of the deceleration in high-speed and high-density train operations degrades riding comfort and frequently causes wheel skids. This requires an introduction of the control technology to upgrade the control performance of brake systems on railway vehicles. We are now studying control methods for a mechanical brake that uses friction and pneumatic pressure, including nonlinear elements as the basis of a brake force. Furthermore, the system itself has certain “dead time,” which is not negligible and makes control difficult. One of our targets is to develop a brake control device that can control the deceleration in accordance with a decelerating pattern that optimizes the riding comfort of trains and prevents wheel skids. In this paper, a design method of the controller for the deceleration tracking control and the system compensating the dead time are proposed. Finally, the effects of them are confirmed through computer simulations and experimental results on a dynamo test stand.

scholarly journals An Expert PI Controller with Dead Time Compensation of Monitor AGC in Hot Strip Mill

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Fei Zhang ◽  
Shengyue Zong ◽  
Xiang Wang ◽  
Xiaohuai Ren
Keyword(s):  
High Speed ◽  
Process Model ◽  
Dead Time ◽  
Pi Controller ◽  
Smith Predictor ◽  
Hot Strip Mill ◽  
Hot Strip Rolling ◽  
Long Distance ◽  
Hot Strip ◽  
Finishing Mill

Hot strip rolling production is a high-speed process which requires high-speed control and communication system, but because of the long distance between the delivery stand of the finishing mill and the gauge meter, dead time occurs when strip is transported from the site of the actuator to another location where the gauge meter takes its reading, which seriously affects the thickness control effect. According to the process model which is developed based on the measured data, a filtered Smith predictor is applied to predict the thickness deviation of the finishing mill. At the same time, an expert PI controller based on feature information is proposed for the strip thinning during looper rising and coiler biting period and the strip thickening during the tension loss period of the strip tail end. As a result, the thickness accuracy has been improved by about 1.06% at a steady rolling speed and about 1.23% in acceleration and deceleration.

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