A Test Method of CCD Photoelectric Parameters

2011 ◽  
Vol 317-319 ◽  
pp. 1119-1122
Author(s):  
Nao Sheng Qiao ◽  
Chun Mei Yao ◽  
Yan Li ◽  
Xue Juan Chen
Keyword(s):  
Output Voltage ◽  
Measurement Method ◽  
Test System ◽  
Test Method ◽  
Test Results ◽  
The Real ◽  
Real Relation ◽  
Comparison Of The Results ◽  
The Ideal

Until now, no effective method to measure CCD photoelectric parameters. To solve the problem, a novel measurement method that combines hardware with software is proposed, and it can let hardware and software collaborate with each other to finish assignment together. Firstly, the ideal relation between output voltage and input exposure quantity of CCD is given. Secondly, some main photoelectric parameters of CCD are elaborated. Then based on the principle, test system of CCD photoelectric parameters that combines hardware with software is designed. Lastly, the real relation between output voltage and input exposure quantity of CCD is given, and the test results of experiment of each photoelectric parameter are obtained according to the relation. What’s more, analysis and comparison of the results of the experiment are given in this paper. The method is reliable and the precision is high in the experiment.

The Research of IC Test Based on LTX-77 Test System

2014 ◽  
Vol 496-500 ◽  
pp. 1176-1179
Author(s):  
Li Tan ◽  
Yu Fang
Keyword(s):  
Test Object ◽  
Test System ◽  
Test Method ◽  
Test Results ◽  
Analog Ic ◽  
Test Platform ◽  
Logic Functions ◽  
Actual Test ◽  
Ic Test

LTX-77 test system is a large IC test system that is used for various kinds of analog IC, digital IC and analog digital mixed IC. It can be used to test DC parameters, AC parameters and logic functions. In the paper, the IC test platform is LTX-77 test system. IC ADC0804 was tested as the test object. The test method of IC is described in the view of actual test. The test results show that the test system is convenient and accurate, which has important practical value for IC manufacturers and users.

The Improved Friction Properties of Bonded MoS2 Films by MAO Treating of Al Substrate

2013 ◽  
Vol 275-277 ◽  
pp. 1911-1914 ◽  
Author(s):  
Han Jun Hu ◽  
Hui Zhou ◽  
Yu Gang Zheng ◽  
Kai Feng Zhang ◽  
Zhi Hua Wan
Keyword(s):  
Tribological Properties ◽  
Solid Lubricants ◽  
Ceramic Coatings ◽  
Test System ◽  
Test Method ◽  
Test Results ◽  
Specimen Test ◽  
Micro Arc Oxidation ◽  
A New Technique ◽  
Porous Microstructures

The bonded MoS2 films are widely used as solid lubricants in aerospace mechanisms due to their excellent tribological properties. Traditionally, the MoS2 was directly bonded on the Al substrate that was only treated by the technique named of sandblast. For improving the tribological properties of MoS2 films, micro arc oxidation (MAO) instead of sandblast was introduced as a new technique for treating of Al substrate. In this article, the tribological properties of MoS2 films which were bonded on different surface of Al substrate as mentioned above were discussed, respectively. It was concluded from the test results that the MoS2 films bonded on substrate treated by MAO have better tribological properties than those samples treated by sandblast. The endurance life against abrasion of the former is as high as twenty times of the latter by the stand test method of ball on disk using the UMT Multi-Specimen Test System. This test results could be illustrated by the following reasons. The first is the porous microstructures of MAO ceramic coatings on the Al substrate. The coatings have numerous pits to be good at increasing the binding force with the MoS2 films, and the pits can also provide a MoS2 lubricants reservoir during processes of friction. Both of them improved the MoS2 film’s ability of wear-protective. The second is that hardness of the coating is higher than the Al, and this ensures well wearing resistance, especially in practical application to big load-supporting moving parts, such as bearing, gear, etc…

scholarly journals An Experimental Study of the Feasibility of Identifying the Impact Damages of Reinforced Concrete Piers Using a Modal Frequency Method

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Xiwu Zhou ◽  
Wenchao Zhang ◽  
Yushen Gao ◽  
Guoxue Zhang ◽  
Mengdan Wen
Keyword(s):  
Reinforced Concrete ◽  
Measurement Method ◽  
Test System ◽  
Ultrasonic Waves ◽  
Test Method ◽  
Signal Acquisition ◽  
Frequency Method ◽  
Modal Frequency ◽  
The Impact ◽  
Impact Damages

In this research study, horizontal impact tests were carried out on five reduced scale pier models using China’s most advanced multifunctional ultrahigh heavy drop hammer impact test system and DHDAS dynamic signal acquisition and analysis system. Due to the fact that the traditional measurement method can only be used for local measurement damage, and the volatility is high, this paper proposes a test method for the modal frequency identification of the overall damage of reinforced concrete pier and applies the ultrasonic damage measurement method to verify the results. The tests analyzed the modal frequencies and ultrasonic velocity identifications for the purpose of evaluating the impact damages of bridge piers, as well as the relationship between them. The results showed that the modal frequencies were consistent with the ultrasonic waves in identifying and evaluating the damages to the piers. Also, the modal frequency damage factors were determined to be functions of the ultrasonic wave velocity damage factors. Therefore, the results of this study confirmed that it was feasible to characterize the impact damages of piers using a modal frequency method.

scholarly journals Discrete Spectral Local Measurement Method for Testing Solar Concentrators

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Huifu Zhao ◽  
Hua Liu ◽  
Lei Jing ◽  
Ying Liu ◽  
Chun Li ◽  
...  
Keyword(s):  
Measurement Method ◽  
Large Diameter ◽  
Test System ◽  
Test Method ◽  
Divergence Angle ◽  
Local Measurement ◽  
Two Stage ◽  
Indoor Concentration ◽  
Outdoor Concentration ◽  
Concentration Test

In order to compensate for the inconvenience and instability of outdoor photovoltaic concentration test system which are caused by the weather changes, we design an indoor concentration test system with a large caliber and a high parallelism, and then verify its feasibility and scientificity. Furthermore, we propose a new concentration test method: the discrete spectral local measurement method. A two-stage Fresnel concentration system is selected as the test object. The indoor and the outdoor concentration experiments are compared. The results show that the outdoor concentration efficiency of the two-stage Fresnel concentration system is 85.56%, while the indoor is 85.45%. The two experimental results are so close that we can verify the scientificity and feasibility of the indoor concentration test system. The light divergence angle of the indoor concentration test system is 0.267° which also matches with sunlight divergence angle. The indoor concentration test system with large diameter (145 mm), simple structure, and low cost will have broad applications in solar concentration field.

Study on the Method of Particle Damping Loss Factor Experiment

2014 ◽  
Vol 501-504 ◽  
pp. 920-924
Author(s):  
Xiang Ke Cheng ◽  
Qi Liang Yang ◽  
Li Hu ◽  
Shuang Yuan ◽  
Zhe Tang
Keyword(s):  
Loss Factor ◽  
Measurement Method ◽  
Control Method ◽  
Test Method ◽  
Sand Particle ◽  
Test Results ◽  
Steady State Flow ◽  
Particle Damping ◽  
Damping Loss Factor ◽  
Particle Dampers

Particle damping (PD) is an emerging technology of efficient vibration control method. However, there are still limited applications in mechanical engineering due to the complexity of damping mechanism. In this paper, basing on the comprehensive studies about gravel particle damping and comparing the existing methods, the steady-state flow method is adopted as the measurement method of particle damping loss factor. Then using this method to measure the loss factor within the 500 Hz sand particle dampers, and the experimental results verify the accuracy of this test method, test results, as well as the superiority of particle damping in vibration.

scholarly journals The Performance of Floating House Sub Structure in Tempe Lake

2021 ◽  
Vol 3 (2) ◽  
pp. 192-199
Author(s):  
Rusdianto Rusdi ◽  
Nasruddin Nasruddin ◽  
Hartawan Madeali
Keyword(s):  
Field Studies ◽  
Test Results ◽  
Real Situation ◽  
The Real ◽  
Floating Raft ◽  
Lifting Capacity ◽  
Ideal Number ◽  
The Mean ◽  
The Difference ◽  
The Ideal

This study aims to reveal the lifting power of the bamboo raft in holding the weight of the house on stilts so that it stays floating on the water. This research was conducted on the shores of Lake Tempe, precisely in Laelo Village, Tempe District, Wajo Regency. The method used in this research is a field study to determine the real situation in the field so that the real condition of the floating house is known. Furthermore, calculating the load used on the floating house based on the results of field studies. The final stage of the research is to test the raft lifting capacity of the floating house. The data will be analyzed according to Archimedes' Law, so that it can be seen that the bamboo raft can stay afloat even though it is given an Architectural building as heavy as a simple stilt house. The results of this study revealed that the average number of bamboos used as a raft was 175 stalks, and the mean diameter of bamboos was 7.67 cm or 0.077 m. It is known that the volume of the rod segment cavity is 0.103 m³, so the total volume between sections on the floating raft on Lake Tempe is 18.058 m³. The lifting capacity of bamboo rafts is directly proportional to the volume of bamboo joints used as rafts. The experimental test results obtained revealed that the lifting capacity of bamboo per m3 was 874.51 kg, so the lifting capacity of the bamboo raft in Tempe Lake was 18.058 m³ x 874.51 kg / m³ = 15,789.13 kg. While the results of the calculation of the burden of a simple house are known by calculating the house's own load and the living load experienced by the house, and the weight of the house is 9,314.121 kg. With the ability to lift a bamboo raft of 15,789.13 kg, the difference between the lifting capacity of the bamboo raft and the weight of the floating house is 6,475.01 kg. The ideal number of bamboo culms is 129 with a safety factor of 25%. There is an efficient use of 46 bamboo sticks.  

Joint Development of a Package-Level Thermal Interface Material Test System

2009 ◽  
Author(s):  
Yanshu Susan Chen ◽  
Stanley Pecavar ◽  
Vadim Gektin
Keyword(s):  
Material Selection ◽  
Test System ◽  
Thermal Design ◽  
Test Method ◽  
Thermal Interface Material ◽  
Test Results ◽  
Performance Measurements ◽  
Thermal Interface ◽  
Application Performance ◽  
Successful Model

As the microelectronics industry continues to trend towards smaller, lighter, and higher power devices, thermal management is becoming more important than ever. Thermal interface materials (TIMs) play a crucial role in removing heat from both bare die and lidded packages. A serious challenge the industry has been facing is the lack of an agreed upon test standard that is specifically tailored for TIM thermal performance measurements between TIM suppliers and OEM customers. ASTM D 5470 is not necessarily the best gauge for TIMs in-application performance. Data generated by the OEM often differ from TIM supplier’s results, and thus can not be used confidently in thermal design. An OEM’s material selection can also prove to be unreliable when comparing data from different TIM suppliers. This paper presents a successful model that an OEM customer (Sun Microsystems) and a TIM supplier (LORD Corporation) have established for characterization of TIMs, and illustrates a package-level thermal test vehicle (TTV) setup for junction-to-sink thermal resistance measurements. Also presented are test results for several TIMs and repeatability of the test method. The effects of a few influencing factors, such as pressure load and TIM staging time, on the test results are also discussed.

scholarly journals The reliability acceleration test method of special vehicle transfer box

2021 ◽  
Vol 243 ◽  
pp. 02006
Author(s):  
Rui Liu ◽  
Wanying Liu ◽  
Yihui Zhao
Keyword(s):  
Product Development ◽  
New Product Development ◽  
New Product ◽  
Test System ◽  
Test Method ◽  
Reliability Test ◽  
Test Results ◽  
Development Cycle ◽  
Special Vehicle ◽  
Acceleration Test

This paper introduces the principle of the simulation load acceleration test system, the principle of accelerating test, and discusses the technology and method of the reliability acceleration test of the box.The accelerated test results show that the simulation load acceleration test can meet the reliability test of the unit, which can shorten the development cycle and have important production practical value for research and new product development.

ISOLATED EFFECTION OF THE XIAZHANG CROSS-SEA ISOLATED BRIDGE

2011 ◽  
Vol 05 (03) ◽  
pp. 297-307 ◽  
Author(s):  
YONG YUAN ◽  
HONG PING ZHU
Keyword(s):  
Real Time ◽  
Base Isolation ◽  
Axial Loading ◽  
Test System ◽  
Test Method ◽  
Loading Test ◽  
The Real ◽  
Isolation Effects ◽  
High Damping Rubber ◽  
Rubber Bearings

In this study, the real-time hybrid loading test system based on the velocity-based loading concept is developed. The test system utilizes the concepts of the real-time hybrid loading test method and the substructure technique to combine the loading process of rubber-bearing specimens and numerical modeling of bridge columns and girders. Newly developed components of the loading test system include: an axial loading device especially devised for the fast loading of rubber bearings, and a real-time test control algorithm using the velocity-based loading concept, implemented to a PC-DSP system framework for the actuator control signal processing. A series of real–time hybrid loading tests on natural rubber (NR), high-damping rubber (HDR), and super-high-damping rubber (HDR-s) bearings are conducted using the test system. The objective of this study is to pursue accurate prediction of the dynamic response and base isolation effects of rubber bearings under realistic earthquake conditions. Specifially, the base isolation effects of HDR-s bearing are discussed. Based on the test results, it is clarified that the HDR-s bearing is more effective than the HDR and NR bearings.

Factual Power Loss Diminution by Enhanced Frog Leaping Algorithm

2020 ◽  
Vol 3 (2) ◽  
pp. 114-118
Author(s):  
Kanagasabai Lenin
Keyword(s):  
Local Search ◽  
Power Loss ◽  
Reactive Power ◽  
Test System ◽  
Premature Convergence ◽  
Speed Of Convergence ◽  
Real Power ◽  
The Real ◽  
Simulation Results ◽  
Power Problem

This paper proposes Enhanced Frog Leaping Algorithm (EFLA) to solve the optimal reactive power problem. Frog leaping algorithm (FLA) replicates the procedure of frogs passing though the wetland and foraging deeds. Set of virtual frogs alienated into numerous groups known as “memeplexes”. Frog’s position’s turn out to be closer in every memeplex after few optimization runs and certainly, this crisis direct to premature convergence. In the proposed Enhanced Frog Leaping Algorithm (EFLA) the most excellent frog information is used to augment the local search in each memeplex and initiate to the exploration bound acceleration. To advance the speed of convergence two acceleration factors are introduced in the exploration plan formulation. Proposed Enhanced Frog Leaping Algorithm (EFLA) has been tested in standard IEEE 14,300 bus test system and simulation results show the projected algorithm reduced the real power loss considerably.

Sign in / Sign up

Export Citation Format

Share Document