Low cost test system for silicon photonics testing

2019 ◽  
Author(s):  
Peng Zhang ◽  
Bo Tang ◽  
Bin Li ◽  
Yan Yang ◽  
Ruonan liu ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Low Cost ◽  
Test System

scholarly journals Application and Development of an Environmentally Friendly Blast Hole Plug for Underground Coal Mines

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Donghui Yang ◽  
Yixin Zhao ◽  
Zhangxuan Ning ◽  
Zhaoheng Lv ◽  
Huafeng Luo
Keyword(s):  
Split Hopkinson Pressure Bar ◽  
Low Cost ◽  
Blast Hole ◽  
Environmentally Friendly ◽  
Test System ◽  
Industrial Test ◽  
Labor Intensity ◽  
Rock Blasting ◽  
Hopkinson Pressure Bar ◽  
The Impact

Drilling and blasting technology is one of the main methods for pressure relief in deep mining. The traditional method for blasting hole blockage with clay stemming has many problems, which include a large volume of transportation, excess loading time, and high labor intensity. An environmentally friendly blast hole plug was designed and developed. This method is cheap, closely blocks the hole, is quickly loaded, and is convenient for transportation. The impact test on the plug was carried out using an improved split Hopkinson pressure bar test system, and the industrial test was carried out in underground tunnel of coal mine. The tests results showed that, compared with clay stemming, the new method proposed in this paper could prolong the action time of the detonation gas, prevent premature detonation gas emissions, reduce the unit consumption of explosives, improve the utilization ratio, reduce the labor intensity of workers, and improve the effect of rock blasting with low cost of rock breaking.

Helium Permeability Measurement of SiC Ceramic Composites for Advanced Reactor Application

2013 ◽  
Author(s):  
Weiqian Zhuo ◽  
Fenglei Niu ◽  
Yungan Zhao ◽  
Houbo Qi ◽  
Zulong Hao ◽  
...  
Keyword(s):  
Low Cost ◽  
Ceramic Composites ◽  
Test System ◽  
Fiber Reinforced ◽  
Water Displacement ◽  
Coated Fiber ◽  
Sic Ceramic ◽  
Carbon Coated ◽  
The Difference ◽  
Reactor Application

Permeability of helium gas of Silicon carbide ceramic composites material, which is one of the most important properties in application of SiC composite for advanced reactors, is studied by using a simple, low-cost test system. The test system can not only qualitatively determine whether the sample is permeable or not, but also quantitatively measure the permeability for the permeable ones by water displacement. The tests are conducted with low pressure in room temperature. The permeability of the SiSiC composite depends on the preparation method. In four flat-plate materials prepared by different processes for the test, the splint based SiSiC and cordierite coated fiber reinforced SiSiC are hermetic, the permeability of uncoated fiber reinforced SiSiC and CVD carbon coated fiber reinforced SiSiC are 0.216cm2/s and 0.109cm2/s, which imply that the permeability is cut in half with the coating. The samples are scanned under SEM to analyze their microscopic structures and verified that the difference of permeability is related to their coatings as well as the pores and cracks.

On automated test system for asymmetric digital subscriber line equipment

2013 ◽  
Vol 10 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Tariq Syed ◽  
Sunil Das ◽  
Satyendra Biswas ◽  
Mansour Assaf ◽  
Emil Petriu
Keyword(s):  
Low Cost ◽  
Test System ◽  
Automated System ◽  
Digital Subscriber Line ◽  
Asymmetric Digital Subscriber Line ◽  
Automated Test System ◽  
Subscriber Line ◽  
Automated Test ◽  
Product Delivery ◽  
Manual Testing

The requirement for an automated test system has immensely increased due to the realization that manual testing is associated with additional resources and staffing constraints. In order to achieve a competitive edge, reduced development cost, timely product delivery, and product quality are mandatory in today's organization. Manual testing requires skilled operators that increase cost, time, and product delivery. The low cost computer-based automated system helps to get an edge by fulfilling these organizational demands. In this paper, an automated testing system has been developed to support functional testing of all phases of Nortel Networks 1-Meg modem system as its system under test (SUT). The modem is an inherently complex asymmetric digital subscriber line (ADSL) product and its testing is far more complex than just verification of process faults. The complexity of ADSL system renders automated test system an important and imperative part of ADSL testing. The subject paper demonstrates the indispensable need of automated test system for ADSL testing and its relative advantages in providing some benefit for the organization.

A Transient Hydrostatic Dynamometer for Single Cylinder Engine Research With Real Time Multi-Cylinder Dynamic Simulation

2003 ◽  
Author(s):  
John L. Lahti ◽  
Steven J. Andrasko ◽  
John J. Moskwa
Keyword(s):  
Low Cost ◽  
Test System ◽  
Engine Operation ◽  
Single Cylinder ◽  
Driving Cycles ◽  
Vehicle Load ◽  
Single Cylinder Engine ◽  
High Bandwidth ◽  
State Regime ◽  
Dynamometer Test

A new high-bandwidth transient hydrostatic dynamometer test system has been developed that accurately replicates multi-cylinder engine operation using a single-cylinder research engine. Single-cylinder engines are typically used for research because of their low cost and good cylinder accessibility for instrumentation and optics. This dynamometer maintains these advantages while dramatically improving transient and low speed testing capabilities. The system also incorporates hardware-in-the-loop models for simulation of other components that would typically be present in a vehicle application. These models include: adjoining cylinders and ancillary components in the engine, the transmission, driveline, and vehicle load. Utilizing these models it is possible to replicate actual driving cycles. This high-bandwidth transient dynamometer extends the test capabilities of single-cylinder research far beyond the traditional steady state regime, enabling transient speed single-cylinder engine research while providing single-cylinder engine operation that is comparable to the multi-cylinder engine.

Test system for wafer-level silicon-photonics testing

2020 ◽  
Author(s):  
Peng Zhang ◽  
Bo Tang ◽  
Yan Yang ◽  
Bin Li ◽  
Ruonan Liu ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Test System ◽  
Wafer Level

scholarly journals Implementation of a Cross-Spectrum FFT Analyzer for a Phase-Noise Test System in a Low-Cost FPGA

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Patrick Fleischmann ◽  
Heinz Mathis ◽  
Jakub Kucera ◽  
Stefan Dahinden
Keyword(s):  
Phase Noise ◽  
Cross Correlation ◽  
Dynamic Range ◽  
Low Cost ◽  
Test System ◽  
Low Noise ◽  
Noise Levels ◽  
High Quality ◽  
Cross Spectrum ◽  
The Cross

The cross-correlation method allows phase-noise measurements of high-quality devices with very low noise levels, using reference sources with higher noise levels than the device under test. To implement this method, a phase-noise analyzer needs to compute the cross-spectral density, that is, the Fourier transform of the cross-correlation, of two time series over a wide frequency range, from fractions of Hz to tens of MHz. Furthermore, the analyzer requires a high dynamic range to accommodate the phase noise of high-quality oscillators that may fall off by more than 100 dB from close-in noise to the noise floor at large frequency offsets. This paper describes the efficient implementation of a cross-spectrum analyzer in a low-cost FPGA, as part of a modern phase-noise analyzer with very fast measurement time.

Design of USB-GPIB Controller Based on up D7210

2011 ◽  
Vol 340 ◽  
pp. 104-108
Author(s):  
Niu Jun Hao ◽  
Zhang Jing Yu ◽  
Cong Hu ◽  
Yin Xian Hua
Keyword(s):  
Automatic Control ◽  
High Speed ◽  
Low Cost ◽  
Test System ◽  
Automatic Test ◽  
Usb Interface ◽  
Automatic Test System ◽  
Gpib Bus ◽  
Interface Chip ◽  
Designing Method

In this paper, a designing method of USB-GPIB controller is introduced in detail, the hardware structure and principle are expounded. By using upD7210 which is a GPIB interface chip and CY7C68013A which is a USB interface controller, the GPIB bus controller with USB interface is designed. With the corresponding driver, an automatic test system is established to realize automatic control by GPIB bus. The USB-GPIB controller has been provided with small size, high speed, and low cost advantages.

scholarly journals Recent Progress in Silicon Photonics: A Review

ISRN Optics ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-27 ◽  
Author(s):  
Zhou Fang ◽  
Ce Zhou Zhao
Keyword(s):  
Integrated Circuits ◽  
Silicon Photonics ◽  
Recent Progress ◽  
State Of The Art ◽  
Low Cost ◽  
Photonic Integrated Circuits ◽  
High Data ◽  
Bandwidth Requirement ◽  
Rate Transmission ◽  
Data Rate Transmission

With the increasing bandwidth requirement in computing and signal processing, the inherent limitations in metallic interconnection are seriously threatening the future of traditional IC industry. Silicon photonics can provide a low-cost approach to overcome the bottleneck of the high data rate transmission by replacing the original electronic integrated circuits with photonic integrated circuits. Although the commercial promise has not been realized, this perspective gives huge impetus to the development of silicon photonics these years. This paper provides an overview of the progress and the state of the art of each component in silicon photonics, including waveguides, filters, modulators, detectors, and lasers, mainly in the last five years.

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