Dust Explosion Test System Based on Ethernet and OPC Technology

2011 ◽  
pp. 98-103
Author(s):  
Nan Miao ◽  
Shengjun Zhong ◽  
Qian Zhang
Keyword(s):  
Test System ◽  
Dust Explosion ◽  
Opc Technology ◽  
Explosion Test

scholarly journals Study and Numerical Simulation on Explosion Propagation Characteristics of Lignite Dust

2020 ◽  
Vol 198 ◽  
pp. 03010
Author(s):  
Zizheng Pang ◽  
Shunbing Zhu ◽  
Yanru He
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Test System ◽  
Dust Explosion ◽  
High Speed Camera ◽  
Propagation Characteristics ◽  
Propagation Law ◽  
Spherical Explosion ◽  
Dust Diffusion ◽  
Explosion Test

In order to reveal the explosion propagation law of lignite dust in 20L spherical explosion test device, the dust diffusion behavior and explosion propagation characteristics of lignite were studied by experiment and numerical simulation. The propagation process of dust explosion is studied by using high-speed camera and 20L spherical explosion test system, and the process of dust diffusion and explosion is simulated by using FLUENT software. The results show that the explosion propagation of lignite dust in the 20L spherical explosion test system has four different stages: the first explosion stage, the full explosion combustion stage, the continuous combustion stage and the combustion attenuation stage. The test results are slightly different from that of the fluent simulation of lignite dust explosion by using the high-speed camera to collect the dust explosion images. Results within the allowable error range, the experimental image of explosion combustion of lignite dust is well connected with the simulation results, which has a good display effect on the explosion propagation of lignite dust.

Tractor Hydraulic Lighten Testing System Based on OPC Technology

2012 ◽  
Vol 184-185 ◽  
pp. 614-620
Author(s):  
Yun Hong Sang ◽  
Liang Ma ◽  
Jian Ning ◽  
Shao Qing Li ◽  
Yi Tian Sun
Keyword(s):  
Test System ◽  
Control Circuit ◽  
Host Computer ◽  
Testing System ◽  
Labor Intensity ◽  
Test Results ◽  
Opc Technology ◽  
Actual Test

This paper proposes a tractor hydraulic lighten testing system based on OPC technology. OPC technology is well applied to Tractor Hydraulic Lighten Testing System. The host computer can directly communicate with PLC and AD module through OPC technology.The control circuit is greatly simplified, the entire experiments can be completed on PC.The operation is convenient; the system is reliable;the program is easy to debug;test types can choose automatic or manual mode.The actual test results show that the performance of device is stable and reliable.The automation degree of the test system is greatly improved, and the labor intensity of operators is greatly reduced.

Visualization Study of Dust Dispersion Process in Siwek 20-L Device for Dust Explosion Test

2014 ◽  
Vol 590 ◽  
pp. 266-270 ◽  
Author(s):  
Bing Du ◽  
Wei Xing Huang ◽  
Nian Sheng Kuai ◽  
Jing Jie Yuan ◽  
Long Liu ◽  
...  
Keyword(s):  
High Speed ◽  
Dust Cloud ◽  
Control Valve ◽  
Processing Technique ◽  
Dust Explosion ◽  
Spherical Vessel ◽  
Dispersion Process ◽  
Visualization System ◽  
Dust Dispersion ◽  
Explosion Test

A visualization method is proposed in order to characterize the dispersion process of dust cloud in Siwek 20-L explosion device. The visualization system consists of a transparent spherical vessel, a dust dispersion device, a high precision control valve and a high-speed camera. Experiment with wheat flour powder indicate that the non-uniformity of dust cloud in space and time can be clearly distinguished based on the frame pictures, as well as the evolution of particles settlement with time after dispersion. Moreover, qualitative analysis based on picture processing technique was carried out to obtain the transmission data of dust cloud from the frame pictures. Results show that the transmission changes rapidly with time and reaches to the minimum value at about 60 ms after dispersion, and with this time, the optimum ignition delay time can be determined for dust explosion test in Siwek 20-L device.

Immunogold labeling of CMP-KDO synthetase produced by recombinant E. Coli cells

1987 ◽  
Vol 45 ◽  
pp. 924-925
Author(s):  
F. A. Durum ◽  
R. G. Goldman ◽  
T. J. Bolling ◽  
M. F. Miller
Keyword(s):  
Inclusion Bodies ◽  
Large Scale ◽  
Recombinant Dna ◽  
Test System ◽  
Cell Protein ◽  
Gram Negative Bacteria ◽  
Cytoplasmic Inclusions ◽  
Isolation And Purification ◽  
E Coli ◽  
Low Concentrations

CMP-KDO synthetase (CKS) is an enzyme which plays a key role in the synthesis of LPS, an outer membrane component unique to gram negative bacteria. CKS activates KDO to CMP-KDO for incorporation into LPS. The enzyme is normally present in low concentrations (0.02% of total cell protein) which makes it difficult to perform large scale isolation and purification. Recently, the gene for CKS from E. coli was cloned and various recombinant DNA constructs overproducing CKS several thousandfold (unpublished data) were derived. Interestingly, no cytoplasmic inclusions of overproduced CKS were observed by EM (Fig. 1) which is in contrast to other reports of large proteinaceous inclusion bodies in various overproducing recombinant strains. The present immunocytochemical study was undertaken to localize CKS in these cells.Immune labeling conditions were first optimized using a previously described cell-free test system. Briefly, this involves soaking small blocks of polymerized bovine serum albumin in purified CKS antigen and subjecting them to various fixation, embedding and immunochemical conditions.

Real Ear Sound Pressure Levels Developed by Three Portable Stereo System Earphones

1992 ◽  
Vol 1 (4) ◽  
pp. 52-55 ◽  
Author(s):  
Gail L. MacLean ◽  
Andrew Stuart ◽  
Robert Stenstrom
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Low Frequency ◽  
Test System ◽  
Output Frequency ◽  
Frequency Effects ◽  
Adult Men ◽  
Frequency Responses ◽  
Significant Difference ◽  
Sound Pressure Levels

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

Pre-clinical evaluation of a virtual reality neuropsychological test system: Occurence of side effects

2000 ◽  
Author(s):  
Tibor I. Kesztyues ◽  
M. Mehlitz ◽  
E. Schilken ◽  
G. Weniger ◽  
S. Wolf ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Side Effects ◽  
Clinical Evaluation ◽  
Neuropsychological Test ◽  
Test System

The Diagnosis of Lupus Anticoagulants by the Activated Partial Thromboplastin Time - The Central Role of Phosphatidyl Serine

1984 ◽  
Vol 52 (02) ◽  
pp. 172-175 ◽  
Author(s):  
P R Kelsey ◽  
K J Stevenson ◽  
L Poller
Keyword(s):  
Screening Method ◽  
Coagulation Factors ◽  
Phosphatidyl Serine ◽  
Test System ◽  
Specific Factor ◽  
Marginal Effect ◽  
Constant Composition ◽  
Lupus Anticoagulants ◽  
Different Types

SummaryLiposomes of pure phospholipids were used in a modified APTT test system and the role of phosphatidyl serine (PS) in determining the sensitivity of the test system to the presence of lupus anticoagulants was assessed. Six consecutive patients with lupus anticoagulants and seven haemophiliacs with anticoagulants directed at specific coagulation factors, were studied. Increasing the concentration of phospholipid in the test system markedly reduced the sensitivity to lupus anticoagulants but had marginal effect on the specific factor inhibitors. The same effect was achieved when the content of PS alone was increased in a vehicle liposome of constant composition.The results suggest that the lupus anticoagulants can best be detected by a screening method using an APTT test with a reagent of low PS content. The use of a reagent rich in PS will largely abolish the lupus anticoagulant’s effect on the APTT. An approach using the two different types of reagent may facilitate differentiation of lupus inhibitors from other types of anticoagulant.

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