Ares: A Scalable High-Performance Passive Measurement Tool Using a Multicore System

2019 ◽  
Author(s):  
Xiaoban Wu ◽  
Yan Luo ◽  
Jeronimo Bezerra ◽  
Liang-Min Wang
Keyword(s):  
High Performance ◽  
Measurement Tool ◽  
Passive Measurement ◽  
Multicore System

Passive Measurement Tool for Monitoring Mobile Packet Network Performances

2006 ◽  
Vol 55 (2) ◽  
pp. 449-455 ◽  
Author(s):  
L. Benetazzo ◽  
C. Narduzzi ◽  
P.A. Pegoraro ◽  
R. Tittoto
Keyword(s):  
Measurement Tool ◽  
Passive Measurement ◽  
Packet Network

scholarly journals Low-Cost Open-Source Device to Measure Maximal Inspiratory and Expiratory Pressures

2021 ◽  
Vol 12 ◽  
Author(s):  
Claudia Aymerich ◽  
Miguel Rodríguez-Lázaro ◽  
Gorka Solana ◽  
Ramon Farré ◽  
Jorge Otero
Keyword(s):  
Open Source ◽  
High Performance ◽  
Point Of Care ◽  
Low Cost ◽  
Three Dimensional ◽  
Technical Information ◽  
Whole Body ◽  
Measurement Tool ◽  
Measuring Device ◽  
Wide Range

The measurement of maximal inspiratory (MIP) and maximal expiratory (MEP) pressures is a widely used technique to non-invasively evaluate respiratory muscle strength in clinical practice. The commercial devices that perform this test range from whole body plethysmographs to portable spirometers, both expensive and include a wide range of other respiratory tests. Given that a portable, low-cost, and specific option for MIP and MEP measuring device is not currently available in the market. A high-performance and easy-to-build prototype has been developed and the detailed technical information to easily reproduce it is freely released. A novel device is based on an Arduino microcontroller with a digital display, an integrated pressure transducer, and three-dimensional (3D) printed enclosure (total retail cost €80). The validation of the device was performed by comparison with a laboratory reference setting, and results showed accuracy within ±1%. As the device design is available according to the open-source hardware approach, measuring MIP/MEP can greatly facilitate easily available point-of-care devices for the monitoring of patients and, most important, for making this lung function measurement tool affordable to users in low- and middle-income countries.

scholarly journals A new measurement tool for characterization of superconducting rf accelerator cavities using high-performance LTS SQUIDs

2007 ◽  
Vol 20 (11) ◽  
pp. S393-S397 ◽  
Author(s):  
W Vodel ◽  
R Neubert ◽  
S Nietzsche ◽  
P Seidel ◽  
K Knaack ◽  
...  
Keyword(s):  
High Performance ◽  
Measurement Tool ◽  
Superconducting Rf

Communication system for down-hole measurement tools based on real-time SNR characterization in coaxial cable used as communication channel

2013 ◽  
Vol 2013 (HITEN) ◽  
pp. 000174-000183 ◽  
Author(s):  
Rito Mijarez ◽  
David Pascacio ◽  
Ricardo Guevara ◽  
Olimpia Pacheco ◽  
Carlos Tello ◽  
...  
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Communication System ◽  
High Performance ◽  
Communication Channel ◽  
Oil And Gas ◽  
Electronic Device ◽  
Coaxial Cable ◽  
Measurement Tool ◽  
Communication Link

Down-hole oil and gas industries are important users of high temperature electronics. In these applications the operating temperature is function of the underground depth of the wells. Oil reservoirs in Mexico are located at mean depths of 6,000 m and the typical geothermal gradient is 25°C/km, however in some areas it is greater. Consequently, the requirements for measuring thermodynamic and geophysical parameters, for instance pressure, temperature, vibration and multiphase flow, are a challenging task. Accomplishing these necessities requires a complete signal communications chain of high-performance components and effective communication techniques to provide system reliability. Nevertheless, noise interference, cable attenuation and thermal drift of the front-end passive electronic elements can lead to poor signal-to-noise ratio (SNR) and possibly loss of the communication link. This paper describes a bidirectional communication system that exchanges data from a down-hole high pressure and high temperature (HP/HT) measurement tool to the surface installation. The communication channel is a multi-conductor coaxial logging cable used also as a power supply transmission line. The system consists of a proprietary down-hole measurement tool, composed of a HP/HT sensor and a high temperature DSP-based electronic device; and located in the surface installation, a data acquisition equipment. The system employs a communication algorithm, based on the SNR characterization of the whole communication chain, which determines in real-time the optimal carrier frequency that is automatically implemented in the selected modulation/demodulation technique. The obtained laboratory tests results of the down-hole tool, using changes in temperature from 25 °C – 185 °C, provide a firm basis for testing and evaluating the system in the field.

Design of the Vehicular Eletro-Optical Tracking Turntable Servo System and the Research on its Tracking Control Scheme

2013 ◽  
Vol 712-715 ◽  
pp. 2119-2123
Author(s):  
Dong Ji ◽  
Hua Pei Wang ◽  
Qing Guo ◽  
Qing Lu
Keyword(s):  
High Precision ◽  
Tracking Control ◽  
High Performance ◽  
Servo System ◽  
Optical Tracking ◽  
Quality Data ◽  
Measurement Tool ◽  
Position Measurement ◽  
Loop Control ◽  
Control Scheme

In order to realize the high precision tracking control of the vehicular eletro-optical tracking turntable with the car bodys vibration, it is necessary to design a high performance turntable servo system and a set of high precision eletro-optical tracking control scheme. In this paper, a digital servo system is designed, which has the control platform based on PC104 processor, has the torque motor as the actuator, has the gyro as the inertial velocity measurement tool and has the high precision encoder as the position measurement tool. Then, the gyrostabilized double speed loop control algorithm with disturbance observer compensating is designed to realize a good inertial velocity stability performace; and, a set of eletro-optical tracking compound position loop control scheme based on the target-missing quality data processing, the segmented PID control and the acceleration lag compensating control is proposed to enhance the eletro-optical tracking precision. The result shows that the tracking turntable based on the control technology designed in this paper is reliable, responses quickly, has a good speed stability performance and a high eletro-optical tracking precision performance.

scholarly journals Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

2018 ◽  
Vol 8 (10) ◽  
pp. 1820 ◽  
Author(s):  
Hongying Zhang ◽  
Dengwang Zhou ◽  
Benzhang Wang ◽  
Chao Pang ◽  
Pengbai Xu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
High Performance ◽  
Frequency Comb ◽  
Sampling Rate ◽  
Time Domain Analysis ◽  
Measurement Tool ◽  
Optical Frequency ◽  
Fiber Sensing ◽  
Optical Fiber Sensing ◽  
Distributed Measurement

Brillouin-based optical fiber sensing has been regarded as a good distributed measurement tool for the modern large geometrical structure and the industrial facilities because it can demodulate the distributed environment information (e.g., temperature and strain) along the sensing fiber. Brillouin optical time domain analysis (BOTDA), which is an excellent and attractive scheme, has been widely developed thanks to its high performance in a signal-to-noise ratio, a spatial resolution, and sensing distance. However, the sampling rate of the classical BOTDA is severely limited by several factors (especially the serially frequency-sweeping process) so that it cannot be suitable for the quickly distributed measurement. In this work, we summarize some promising breakthroughs about the fast BOTDA, which can be named as an optical frequency comb technique, an optical frequency-agile technique, a slope-assisted technique, and an optical chirp chain technique.

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

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