Design of “Universal Module” Based Time and Frequency System using White Rabbit Technology

2021 ◽  
Author(s):  
Yan Xie ◽  
Erik Dierikx ◽  
Marijn van Veghel
Keyword(s):  
Time Signal ◽  
Integrated Devices ◽  
Measurement Results ◽  
Set Up

In the WR network, a dedicated time and frequency system is set up to deliver and distribute the time signal from WR switches or WR nodes locally. Accordingly, the design of a flexible, transferrable, and extensible time and frequency system is required for complementing existing WR equipment and WR networks. Here we propose the concept of “universal module”. Based on the universal modules, a variety of devices and TF system can be developed. In particular, three applications are demonstrated in this paper. Finally, the first measurement results of the integrated devices will be demonstrated in this paper.

scholarly journals Design of “Universal Module” Based Time and Frequency System using White Rabbit Technology

2021 ◽  
Author(s):  
Yan Xie ◽  
Erik Dierikx ◽  
Marijn van Veghel
Keyword(s):  
Time Signal ◽  
Integrated Devices ◽  
Measurement Results ◽  
Set Up

In the WR network, a dedicated time and frequency system is set up to deliver and distribute the time signal from WR switches or WR nodes locally. Accordingly, the design of a flexible, transferrable, and extensible time and frequency system is required for complementing existing WR equipment and WR networks. Here we propose the concept of “universal module”. Based on the universal modules, a variety of devices and TF system can be developed. In particular, three applications are demonstrated in this paper. Finally, the first measurement results of the integrated devices will be demonstrated in this paper.

scholarly journals Influence of a Thermal Pad on Selected Parameters of Power LEDs

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3732
Author(s):  
Krzysztof Górecki ◽  
Przemysław Ptak ◽  
Tomasz Torzewicz ◽  
Marcin Janicki
Keyword(s):  
Optical Properties ◽  
Thermal Resistance ◽  
Optical Power ◽  
Junction Temperature ◽  
Operating Parameters ◽  
Cold Plate ◽  
Optical Efficiency ◽  
Forward Current ◽  
Measurement Results ◽  
Set Up

This paper is devoted to the analysis of the influence of thermal pads on electric, optical, and thermal parameters of power LEDs. Measurements of parameters, such as thermal resistance, optical efficiency, and optical power, were performed for selected types of power LEDs operating with a thermal pad and without it at different values of the diode forward current and temperature of the cold plate. First, the measurement set-up used in the paper is described in detail. Then, the measurement results obtained for both considered manners of power LED assembly are compared. Some characteristics that illustrate the influence of forward current and temperature of the cold plate on electric, thermal, and optical properties of the tested devices are presented and discussed. It is shown that the use of the thermal pad makes it possible to achieve more advantageous values of operating parameters of the considered semiconductor devices at lower values of their junction temperature, which guarantees an increase in their lifetime.

Half-mode substrate integrated plasmonic waveguide for filter and diplexer designs

2021 ◽  
Author(s):  
Yue Cui ◽  
Kai-Da Xu ◽  
Ying-Jiang Guo ◽  
Qiang Chen
Keyword(s):  
Communication Systems ◽  
Surface Plasmon Polariton ◽  
Simple Structure ◽  
Bandpass Filter ◽  
Cutoff Frequency ◽  
Plasmonic Waveguide ◽  
Wireless Communication Systems ◽  
Integrated Devices ◽  
Measurement Results ◽  
Via Holes

Abstract A half-mode substrate integrated waveguide (HMSIW) combined with spoof surface plasmon polariton (SSPP) structure is proposed to realize bandpass filter (BPF) characteristic and miniaturization, which is termed as the half-mode substrate integrated plasmonic waveguide (HMSIPW). Compared with the conventional HMSIW structure having identical cutoff frequency, this new design of HMSIPW not only supports SSPP modes, but also realizes a transversal size reduction of 19.4% and longitudinal reduction of more than 60%. Then, a diplexer based on two back-to-back placed HMSIPW BPFs is designed, and it has only one row of metallized via holes to further reduce the transversal size. The experimental prototypes of the filters and diplexer have been manufactured, and the measurement results agree well with simulation ones. Due to the size miniaturization and simple structure, the proposed designs will have many potentials in the integrated devices and circuits for wireless communication systems.

Measurement on Temperature Distribution of Metal Powder Stream in Laser Fabricating

2011 ◽  
Vol 101-102 ◽  
pp. 994-997 ◽  
Author(s):  
Jian Bo Lei ◽  
Zhen Wang ◽  
Yun Shan Wang
Keyword(s):  
Temperature Distribution ◽  
Temperature Gradient ◽  
Thermal Radiation ◽  
Metal Powder ◽  
Visible Region ◽  
Digital Signal ◽  
Processing Parameters ◽  
Measurement Results ◽  
Set Up ◽  
Powder Temperature

In order to study temperature distribution of metal powder stream in laser fabricating, its thermal radiation in visible region was detected by CCD. Based on Planck’s radiation law, the relation between molten powder temperature and its visible thermal radiation could be set up. The thermal radiation image signal of powder stream was transformed to digital signal which was used to analyzing its temperature distribution. It was shown that crosswise dimension of molten powder was about 2.5mm in diameter at the distance of 5mm from power nozzle. The powder out from powder nozzle was heated rapidly by laser. Temperature of powder in central axis regions was the highest which was nearly 2000K at the power of 1100w. The temperature gradient of powder at the edge of laser stream was greatly. The measurement results could be used to optimize the design of powder nozzle and processing parameters of laser fabricating.

scholarly journals A frame for a computer aided inspection planning system

2015 ◽  
Vol 4 (1) ◽  
pp. 125 ◽  
Author(s):  
Wilma Polini ◽  
Giovanni Moroni
Keyword(s):  
Measurement Techniques ◽  
Coordinate Measuring Machine ◽  
Planning System ◽  
Inspection Planning ◽  
Coordinate Measurement ◽  
Measurement Results ◽  
Measuring Machine ◽  
Set Up ◽  
Almost All ◽  
Computer Aided Inspection

Coordinate Measuring Machine (CMM) inspection planning is an activity performed by well-trained operators, but different measurement techniques, using the same data analysis algorithms yield in different measurement results. This is a well-recognized source of uncertainty in coordinate measurement. A CMM, provided with an automatic inspection planning (CAIP) system, permits to implement more accurate and efficient operating procedures and to fit higher quality assurance standards and tighter production timings.In this paper we present a frame of a CAIP system, able to deal with almost all the decisional stages of CMM inspection. Moreover, original approaches have been developed and presented in inspection feature selection, part set-up, probe configuration, and path planning.

scholarly journals Characterization of a Micro-Opto-Mechanical Transducer for the Electric Field Strength

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 855
Author(s):  
Wilfried Hortschitz ◽  
Andreas Kainz ◽  
Harald Steiner ◽  
Gabor Kovacs ◽  
Michael Stifter ◽  
...  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Resolution Limit ◽  
Strength Based ◽  
Measurement Results ◽  
Mechanical Transducer ◽  
Mems Technology ◽  
Order Of Magnitude ◽  
Set Up

We report on a new optical sensing principle for measuring the electric field strength based on MEMS technology. This method allows for distortion-free and point-like measurements with high stability regarding temperature. The main focus of this paper rests on an enhanced measurement set-up and the thereby obtained measurement results. These results reveal an improved resolution limit and point to the limitations of the current characterization approach. A resolution limit of 222 V/m was achieved while a further improvement of roughly one order of magnitude is feasible.

The Research on Establishing Method of the Broadband Nonlinear Transformer Model

2014 ◽  
Vol 986-987 ◽  
pp. 2031-2034
Author(s):  
Zhong Yuan Zhang ◽  
Zeng Chao Wang ◽  
Xin Zhang
Keyword(s):  
Power Transformer ◽  
Simulation Software ◽  
Transient Simulation ◽  
Iron Core ◽  
Equivalent Transformation ◽  
Measurement Results ◽  
Set Up ◽  
Transformer Model ◽  
Broadband Frequency ◽  
Linear Block

The transformer model is one of the most needed to improving components of the modern transient simulation software. A new nonlinear broadband frequency (50Hz-10MHz) model of power transformer is proposed in this paper. The model is divided into a linear block and a nonlinear block by a reasonable equivalent transformation. The linear block is set up through measuring and synthesizing. And the nonlinear block is derived by the impendence of iron core. The final circuit model is built in Simulink, and the comparisons between the simulation and measurement results verify the feasibility and validity of the model.

A setup to characterize the tensile mechanical properties of poly(L-lactic acid) materials applied in bioresorbable polymer stents

2021 ◽  
Vol 16 (12) ◽  
pp. P12005
Author(s):  
G. Zhao ◽  
R. He ◽  
X. Li ◽  
J. Zhang ◽  
J. Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Yield Strength ◽  
Biodegradable Polymer ◽  
Elasticity Modulus ◽  
Breaking Elongation ◽  
Measurement Results ◽  
Different Shapes ◽  
Bioresorbable Polymer ◽  
Set Up

Abstract A method for testing mechanical properties of miniature poly(L-lactic acid)(PLLA) specimens is instrumented and set up in this research. This method is specially designed to measure mechanical properties, including elasticity modulus, yield strength and breaking elongation, of miniature PLLA specimens in three different shapes at various tensile speeds and temperatures. Moreover, the measurement results are significantly dependent on the tensile speeds and temperatures. This phenomenon further verifies the obvious existence of the viscoelasticity of PLLA. Finally, it can be concluded that, with this method, mechanical properties of PLLA can be better investigated and understood, especially for PLLA used for biodegradable polymer stents.

scholarly journals Predict the Influence of Environmental Vibration from High-Speed Railway on Over-Track Buildings

2021 ◽  
Vol 13 (6) ◽  
pp. 3218
Author(s):  
Guoqing Di ◽  
Ziyin Xie ◽  
Jingyi Guo
Keyword(s):  
High Speed ◽  
Element Model ◽  
Vertical Vibration ◽  
High Speed Railway ◽  
Line Load ◽  
Railway Industry ◽  
Measurement Results ◽  
Environmental Vibration ◽  
Set Up ◽  
Improved Model

The vibration caused by railways is an environmental constraint in the development of over-track buildings. To study the influence of environmental vibration from the high-speed railway on over-track buildings, a finite element model including track, soil, and buildings was set up. Based on the vertical vibration acceleration sampled on the rail, the equivalent line load acting on rails vertically was obtained by a simplified model. On the basis of verifying the simulation model by measurement results, the vertical vibration induced by high-speed railways in over-track buildings was studied quantitatively. Through introducing correction terms relating to the thickness and height of the over-track platform, the story number, and the structure of the over-track building, an existing model released by the railway industry of China was improved. Compared with the existing model only being suitable for predicting vertical vibration of the first floor, the improved model can predict vertical vibration of different floors.

Numerical Investigation of Temperature and Phase Development of (Deformation-) Dilatometer Specimens

2014 ◽  
Vol 611-612 ◽  
pp. 1539-1544
Author(s):  
Stefan Lutz ◽  
Johannes Weninger ◽  
Bastian Helldörfer ◽  
Marion Merklein
Keyword(s):  
Testing Machine ◽  
Element Model ◽  
Constant Load ◽  
Phase Development ◽  
Isothermal Plane ◽  
Measurement Results ◽  
High Cooling Rates ◽  
Set Up ◽  
Transformation Diagrams ◽  
Gleeble 3500

The Gleeble 3500 thermo-mechanical testing machine with ISO-Q dilatometer set-up allows the creation of time temperature transformation diagrams at high cooling rates, after deformation and under constant load with a simple experimental set-up. An isothermal plane with temperature gradients perpendicular to this plane arises in the sample which is used for dilatometrical evaluation. The homogeneity and size of this isothermal region has a decisive influence on the measurement results, but cannot be measured with sufficient accuracy. To gain an accurate understanding of the processes in the sample, a coupled thermo-electrical, thermo-metallurgical, thermo-mechanical finite element model of the experiments is set up. To map the temperature control circuit of the machine, a PID controller is implemented, which controls the voltage of the conductive sample heating between the simulation steps. By comparing the temperature and hardness distribution with the experiments, it is shown that in this way the temperature distribution and phase transformation can be mapped. By the findings, the experimental setup was adjusted. This led to an improvement of the measurement results.

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