scholarly journals A Smart and Distributed Measurement System to Acquire and Analyze Mechanical Motion Parameters

2013 ◽  
Vol 20 (3) ◽  
pp. 465-478 ◽  
Author(s):  
J.M. Dias Pereira ◽  
Vítor Viegas ◽  
Octavian Postolache ◽  
Pedro Silva Girão
Keyword(s):  
Data Acquisition ◽  
Measurement System ◽  
Measurement Errors ◽  
Supply Voltage ◽  
Low Cost ◽  
Mechanical Motion ◽  
Power Supply Voltage ◽  
Motion Parameters ◽  
Distributed Measurement ◽  
Data Acquisition Unit

Abstract This paper presents a low-cost and smart measurement system to acquire and analyze mechanical motion parameters. The measurement system integrates several measuring nodes that include one or more triaxial accelerometers, a temperature sensor, a data acquisition unit and a wireless communication unit. Particular attention was dedicated to measurement system accuracy and compensation of measurement errors caused by power supply voltage variations, by temperature variations and by accelerometers’ misalignments. Mathematical relationships for error compensation were derived and software routines for measurement system configuration, data acquisition, data processing, and self-testing purposes were developed. The paper includes several simulation and experimental results obtained from an assembled prototype based on a crank-piston mechanism

scholarly journals Analysis and application of two-current-source circuit as a signal conditioner for resistive sensors

2017 ◽  
Vol 68 (3) ◽  
pp. 200-205
Author(s):  
Adam Idzkowski ◽  
Jerzy Gołębiowski ◽  
Wojciech Walendziuk
Keyword(s):  
Data Acquisition ◽  
Measurement System ◽  
Measurement Errors ◽  
Current Source ◽  
Laboratory Measurement ◽  
Relative Resistance ◽  
Circuit Realization ◽  
The Difference ◽  
Circuit Output

Abstract The article presents the analysis of metrological properties of a two-current-source supplied circuit. It includes such data as precise and simplified equations for two circuit output voltages in the function of relative resistance increments of sensors. Moreover, graphs showing nonlinearity coefficients of both output voltages for two resistance increments varying widely are presented. Graphs of transfer resistances, depending on relative increments of sensors resistance were also created. The article also contains a description of bridge-based circuit realization with the use of a computer and a data acquisition (DAQ) card. Laboratory measurement of the difference and sum of relative resistance increments of two resistance decade boxes were carried out indirectly with the use of the created measurement system. Measurement errors were calculated and included in the article, as well.

Design of a Multichannel High Precision Instrument in Portable Data Acquisition

2014 ◽  
Vol 644-650 ◽  
pp. 3718-3721
Author(s):  
Ai Hua Dong ◽  
Xiao Yan Kang ◽  
Yun Yi Wang
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Data Storage ◽  
Low Cost ◽  
Main Function ◽  
Synchronous Sampling ◽  
Sample Data ◽  
Visual Basic6.0 ◽  
Processing Software ◽  
Data Acquisition Unit

For the need of multi-channel simultaneous sampling in the modeling and identification of power system, a portable data acquisition system is introduced. It can sample multi-channel data simultaneously, and also have a mass data storage. The system is composed of data acquisition card and PC processing software. The C8051F410 MCU is the core of the data acquisition unit card. It not only provides multi-channel synchronous sampling, large storage capacity, easy to carry and low cost, but also can run offline, and bidirectional interaction with PC software. The data processing software is programmed by Visual Basic6.0. Its main function is sending sample orders and the sample data processing. It can store and process the sample data, also it can set the sampling parameters of the card. Through actual verification, the system is easy to use and meets the precision of requirement.

Enhanced Mpilog macromodels for Signal and Power Integrity Simulations

2015 ◽  
Vol 2015 (1) ◽  
pp. 000306-000311
Author(s):  
Gianni Signorini ◽  
Claudio Siviero ◽  
Igor Simone Stievano ◽  
Stefano Grivet-Talocia
Keyword(s):  
High Speed ◽  
Supply Voltage ◽  
State Of The Art ◽  
Low Cost ◽  
System Level ◽  
Power Integrity ◽  
Mobile Platforms ◽  
Power Supply Voltage ◽  
Dynamic Components ◽  
Small Form Factor

Due to increasingly stringent low-cost and small form-factor design constraints, Signal and Power Integrity analyses (SI&PI) have gained a paramount importance in the definition and optimization of mobile platforms. Operating margins are dramatically reduced in order to meet all the required design targets and constraints (extensive re-use, time-to-market, etc.). In this scenario, transistor-level simulations for platform-level analyses are inefficient and often, impractical. I/O-buffer models become essential and their accuracy is crucial for the reliability of SI&PI studies. As data-rates increase, signaling swing reduces and power-supply voltage noise becomes inevitable, state-of-the-art legacy models are limited for SI&PI co-simulations. This work summarizes the recent enhancements of “Mpilog”-class macromodels for high-speed I/O-buffers. Mpilog macromodels reproduce voltage and currents at I/O and (multiple) supply ports as weighted combinations of pull-up/pull-down static and dynamic components. The static parts are extracted via nested DC sweeps simulations and reproduced by tensor representations obtained via high-order singular value decomposition (SVD) processes. The dynamic components are described by linear state-space models identified from device's transient responses to suitable stimuli. For transmitters, the weighting functions match the output-port transitions and the dynamic supply-current profiles, capturing also the dependency of switching delays upon supply-voltage fluctuations; this is a key feature that enables Mpilog macromodels to precisely reproduce simultaneous-switching-noise (SSN) effects in complex system-level SI&PI simulations. The macromodels can be readily synthesized as SPICE netlists (including resistors, capacitors and controlled-sources) or Verilog-A codes; this allows their use in any SPICE-type electrical solver. Several examples of realistic SI&PI simulations for single-ended and differential interfaces are presented. Transistor-level simulations are compared with the corresponding ones based on Mpilog-macromodels: the resulting accuracy and the speed-up factors are extensively discussed. Comparisons with state-of-the-art legacy models (IBIS) are also discussed.

A Method to Measure the Dynamic Response Time for an Electronic Fuel Injector

2010 ◽  
Vol 44-47 ◽  
pp. 1563-1567
Author(s):  
Hui Guo ◽  
Zhen Dong Zhang ◽  
Qing Jun Li ◽  
Yue Dong Sun
Keyword(s):  
Dynamic Response ◽  
Response Time ◽  
Measurement System ◽  
Measurement Errors ◽  
Research Effort ◽  
Low Cost ◽  
Engine Performance ◽  
Successful Implementation ◽  
Fuel Injector ◽  
Opening And Closing

The focus of this research effort was to develop a technique to measure the dynamic responding time of the electronic fuel injector (EFI). Successful implementation of the measurement technique introduced in this paper can be used to evaluate injectors and improve its design. More consistent and precise fuel injectors have the potential to improve fuel efficiency, engine performance, and reduce emissions. According to the dynamic working process of the EFI, the coil current of the EFI can bitterly reflect its dynamic response time, which is the measurement mechanism. Then the test circuits of the opening and closing response time of the EFI were designed, and the measurement system was developed with the C8051F310 as the processor. The results showed that the measurement errors of the opening and closing response time of the EFI were 0.9% and 1.14%, and this met to the testing requirements of some research on the EFI. And so, the measurement system was low cost, convenient and high precision.

scholarly journals Distributed data acquisition and control system based on low cost Embedded Web servers

2011 ◽  
pp. 78-81
Author(s):  
Joby Antony ◽  
Basanta Mahato ◽  
Sachin Sharma ◽  
Gaurav Chitranshi
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
Low Cost ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Web Servers ◽  
Automation And Control ◽  
Distributed Measurement ◽  
And Control ◽  
Measurement And Control

In the present IT age, we are in need of fully automated industrial system. To design of Data Acquisition System (DAS) and its control is a challenging part of any measurement, automation and control system applications. Advancement in technology is very well reflected and supported by changes in measurement and control instrumentation. To move to highspeed serial from Parallel bus architectures has become prevalent and among these Ethernet is the most preferred switched Serial bus, which is forward-looking and backwardcompatible. Great stride have been made in promoting Ethernet use for industrial networks and factory automation. The Web based distributed measurement and control is slowly replacing parallel architectures due to its non-crate architecture which reduces complexities of cooling, maintenance etc. for slow speed field processing. A new kind of expandable, distributed large I/O data acquisition system based on low cost microcontroller based electronic web server[1] boards has been investigated and developed in this paper, whose hardware boards use 8-bit RISC processor with Ethernet controller, and software platform use AVR-GCC for firmware and Python for OS independent man machine interface. This system can measure all kinds of electrical and thermal parameters such as voltage, current, thermocouple, RTD, and so on. The measured data can be displayed on web pages at different geographical locations, and at the same time can be transmitted through RJ-45 Ethernet network to remote DAS or DCS monitoring system by using HTTP protocol. A central embedded single board computer (SBC) can act as a central CPU to communicate between web servers automatically.

scholarly journals Low-Cost Data Acquisition Unit for Flight Tests

2019 ◽  
Vol 2019 (11) ◽  
pp. 121-130
Author(s):  
Błażej Morawski ◽  
Dominik Głowacki ◽  
Anna Głowacka
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Full Scale ◽  
Cost Data ◽  
Development Environment ◽  
Flight Tests ◽  
Helicopter Flight ◽  
Data Acquisition Unit

AbstractThe purpose of this paper is to present the design of a data recorder for flight tests of a full-scale aircraft and an UAV. The recorder is built based on the Arduino microprocessor platform and LabVIEW development environment. The data recorder will be used mainly for helicopter flight tests.

scholarly journals Development of the Plant Factory Realizing a Low Cost Automation. (Part 1). Development of Distributed Measurement System.

1998 ◽  
Vol 10 (4) ◽  
pp. 243-248
Author(s):  
Toshinobu TAKEUCHI ◽  
Yoshikazu NAKANISHI ◽  
Shinichi YAMADA ◽  
Yasushi HASHIMOTO
Keyword(s):  
Measurement System ◽  
Low Cost ◽  
Plant Factory ◽  
Distributed Measurement
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