The Design and Realization of Airborne Electrical Equipments’ Online Test System in the Environments of Mechanics

2014 ◽  
Vol 687-691 ◽  
pp. 1038-1043
Author(s):  
Yong Tao Yu ◽  
Ming Chen ◽  
Feng Tian ◽  
Ying Ji Shan
Keyword(s):  
High Efficiency ◽  
Dynamic Test ◽  
Digital Signal ◽  
Test System ◽  
Experimental Result ◽  
Signal Acquisition ◽  
Online Test ◽  
Development Tool ◽  
The Stability ◽  
Software Development Tool

Current OTS (Online Test System, OTS) of airborne electrical equipments in the environments of mechanics is only able to test statically but dynamically. To solve the problem, a new kind of dynamic test system based on PXI bus is designed. In the design, modular instrument resources that used in the third generation of ATE (Auto Test System, ATE) commonly is adopted to prove the system’s reusability, extensibility and standard ability, digital signal acquisition is replaced with analog signal acquisition to realize dynamic test, support from the method of process monitoring is drew to get the capability to detect the reversible failure in UUT (Unit Under Test, UTT), VC++ language is used as the software development tool to control the system and record test data. In the special mechanics environment such as centrifuge, drawing lessons from the experience of the new concept dynamic test, the system architecture of remote control acquisition is used to prove the stability and efficiency of the test system greatly. The experimental result shows that the system runs well and has more advantages such as high efficiency of auto-test and reliability of failure diagnosis results, meeting new demand of the airborne electrical equipments’ online test in the environments of mechanics.

Signal Acquisition and Processing in Hydraulic Components Test System

2013 ◽  
Vol 846-847 ◽  
pp. 972-976
Author(s):  
Xiao Teng Zeng
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Performance Test ◽  
Performance Testing ◽  
Digital Signal ◽  
Test System ◽  
Processing Method ◽  
Signal Acquisition ◽  
Performance Parameters ◽  
Signal Acquisition And Processing

The key to the performance test system for hydraulic components is to realize real, fast and accurate signal acquisition and processing. By analysis the analog and digital signal processing during hydraulic components Performance testing, a new signal flow scheme is proposed. It described in detail the acquisition and processing method of serial signals and PLC signals, thus solving the lag and distortion during signal processing and realizing the real-time display of data and the automatic report of performance parameters during hydraulic components testing process.

The Design of TIG-AWP Based on Inverter and DSP

2012 ◽  
Vol 236-237 ◽  
pp. 484-487
Author(s):  
Chun Tian Li ◽  
Yi Luo ◽  
Chang Hua Du ◽  
Gui Sheng Gan
Keyword(s):  
Digital Signal Processor ◽  
Pulse Width Modulation ◽  
Welding Process ◽  
Feedback Regulation ◽  
Digital Signal ◽  
Intermediate Frequency ◽  
Control Circuit ◽  
Experimental Result ◽  
Modulation Control ◽  
The Stability

The main circuit of tungsten inert gas (TIG) arc welding power (AWP), which is mode of the inverter for intermediate frequency and full-bridge IGBT, is designed based on DSP (Digital Signal Processor). The control designing, also based on DSP, include the sampling signal circuit, the control circuit for external characteristics, the PWM (Pulse-Width -Modulation) control circuit of TIG-AWP, the IGBT drive circuit and etc. This designing can strengthen the reliability of feedback regulation property on TIG-AWP; can enhance the stability of the parameters from the power system. The experimental result shows that the designed TIG-AWP has good feedback regulation and stability properties during the TIG welding process.

scholarly journals Monitoring of train-induced vibrations on rock slopes

2017 ◽  
Vol 13 (1) ◽  
pp. 155014771668755 ◽  
Author(s):  
Jiangbo Xu ◽  
Changgen Yan ◽  
Xu Zhao ◽  
Ke Du ◽  
Heng Li ◽  
...  
Keyword(s):  
Particle Velocity ◽  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Test System ◽  
Peak Particle Velocity ◽  
Vibration Test ◽  
Long Distance ◽  
Stability Of Slopes ◽  
The Stability

Train-induced vibrations will undoubtedly influence the stability of slopes near railway lines. To monitor the effects of such vibrations on slope stability, a wirelessly networked vibration test system was established, which included wirelessly networked vibration meters, high-precision and high-speed three-dimensional sensors and a remote wirelessly networked data server system. This system represents the first attempt to monitor the effects of train-induced vibrations on the stability of slopes in China. It enables real-time and long-distance monitoring by means of remote transmission with a low cost and high efficiency. The duration, frequency, amplitude, peak acceleration and peak particle velocity were adopted as measures for evaluating the influence of train vibrations. Simultaneously, we used additional monitoring technologies to verify the conclusions of the wirelessly networked vibration test system. The monitoring results indicated that the peak particle velocity was much higher near the track and gradually decreased with increasing distance. When the distance between the measurement point and the road axis was 12 m ( H = 0 m), the maximal peak particle velocity was 0.4 mm/s, which remained below the maximum safe value.

The Design and Implementation of Telemetry Acquisition System Based on FPGA

2012 ◽  
Vol 182-183 ◽  
pp. 561-565
Author(s):  
Su Hua Liu ◽  
San Min Shen ◽  
Ji Jun Xiong ◽  
Hu Feng Guo
Keyword(s):  
Data Storage ◽  
Sampling Rate ◽  
Digital Signal ◽  
Test System ◽  
Frame Structure ◽  
Collection System ◽  
Telemetry Data ◽  
System Parameters ◽  
Overall Design ◽  
The Stability

In order to meet the needs of telemetry test system parameters testing, we propose FPGA based on telemetry data acquisition system's overall design, and describe the methods and processes of the collection of analog signal and the reception of digital signal in detail. According to the sampling rate of the slow-changing and the rapid-changing, the frame structure is designed. Under the control of PC, data collection and coding are achived by FPGA, and real-time monitoring of data is achived through testing platform and data storage is achived by data recorders to monitor and implement, and modelsim software simulates the timing of the program. After the application of the practice, the stability and reliability of the collection system get confirmed.

Application of Pressure Test System in Dispenser for Gasoline

2010 ◽  
Vol 97-101 ◽  
pp. 4243-4246
Author(s):  
Zhan Shu He ◽  
Ya Jun Liu ◽  
Jun Liu ◽  
Jia Bao Wang
Keyword(s):  
Gas Separation ◽  
Performance Optimization ◽  
Digital Signal ◽  
Test System ◽  
Signal Acquisition ◽  
Excessive Pressure ◽  
Pressure Transducers ◽  
Reliable Diagnosis ◽  
Pressure Test ◽  
Oil Gas

In the dispenser for gasoline there exist three problems: excessive pressure caused by water hammer, inadequacy of oil-gas separation and cavitation. A pressure test system of the dispenser for gasoline is established by using pressure transducers and a digital signal acquisition system. Results show that the pressure test system can not only conduct real-time and reliable diagnosis of the dispenser pressure, but also provide guideline on its performance optimization.

An Engine Dynamic Signal Testing System Based on Virtual Instrument Technology

2009 ◽  
Vol 16-19 ◽  
pp. 193-198 ◽  
Author(s):  
Ying Ji Liu ◽  
Feng Tian Cai ◽  
Wei Zhou ◽  
Xue Li Zhang ◽  
Tian Xia Zhang
Keyword(s):  
Virtual Instrument ◽  
High Speed ◽  
Computer Software ◽  
Digital Signal ◽  
Test System ◽  
Structure Design ◽  
Signal Acquisition ◽  
Instrument Technology ◽  
Dynamic Signal ◽  
Engine Dynamic

Aimed at the requirements of engine experimental research，a test system of engine dynamic signal was developed based on virtual instrument technology. The integral structure design of the system was given, the hardware is composed of sensors, signal conditioning module, high-speed data acquisition card and portable computer; the host computer software was developed with DASYLab, a virtual instrumentation tool. Its essential is to make good use of computer to achieve and extend functions of traditional instruments, by comprehensively using technologies of computer, digital signal processing, standard bus and software engineering method, functions of continuous multi channel sampling and multi type signal acquisition, and processing analysis were realized. The field test shows the system works reliably, development and application of this system can provide detailed experiment data and a new way in the field of engine power detection.

Designing of CO2 Inverter Welding Power for the Mode of Full-Bridge and IGBT Based on DSP

2011 ◽  
Vol 80-81 ◽  
pp. 730-736 ◽  
Author(s):  
Chun Tian Li ◽  
Xiao Bin Zhang ◽  
Yi Luo ◽  
Chang Hua Du
Keyword(s):  
Digital Signal Processor ◽  
Pulse Width Modulation ◽  
Welding Process ◽  
Feedback Regulation ◽  
Digital Signal ◽  
Control Circuit ◽  
Experimental Result ◽  
Modulation Control ◽  
The Stability ◽  
Welding Inverter

The main and control circuit of co2 welding power, which is mode of full-bridge and IGBT inverter, is designed based on DSP (Digital Signal Processor). The designing include sub-modules based on DSP such as the sampling signal circuit, the control circuit for external characteristics, the PWM (Pulse-Width -Modulation) control circuit of welding inverter, the IGBT drive circuit and etc. This designing can strengthen the reliability of feedback regulation property on co2 inverter welding power can enhance the stability of the parameters from the power system. The experimental result shows that the inverter welding power has good feedback regulation and stability properties during the co2 welding process.

The Design of Data Acquisition Storage and Real-Time Monitoring System Based on FPGA

2011 ◽  
Vol 341-342 ◽  
pp. 803-806
Author(s):  
Su Hua Liu ◽  
San Min Shen ◽  
Yong Ye ◽  
Ji Jun Xiong
Keyword(s):  
Data Acquisition ◽  
Real Time ◽  
Digital Signal ◽  
Test System ◽  
Real Time Monitoring ◽  
Collection System ◽  
The Real ◽  
Overall Design ◽  
The Stability ◽  
And Storage

In the test system, all kinds of signals need to be processed. In order to meet the need of test system,we propose a kind of method of overall design of the real-time monitoring and storage of analog signal and digital signal. And we descript that how the data is sent to PC to real-time monitor and how we read out the data of the storage, and at the same time, the effect of the real-time monitoring is mentioned. After the application of the practice, the stability and the reliability of the collection system get confirmed.

Study on the Key Technology of the Coastal Waterway Long-Distance Tide Extract and its Software Realization

2014 ◽  
Vol 568-570 ◽  
pp. 1463-1468
Author(s):  
Sheng Ping Wang ◽  
Yan Feng Li ◽  
Xiao Yu Li ◽  
Hai Bo Qin
Keyword(s):  
Software System ◽  
Long Distance ◽  
Key Technology ◽  
Development Tool ◽  
Key Technologies ◽  
Computer Environment ◽  
Gps Rtk ◽  
The Stability ◽  
Stability And Accuracy ◽  
Software Development Tool

In this paper, we developed a tide extraction software system which is based on GPS RTK / PPK and MRU (Motion Reference Unit) . Firstly, we analysis the quality control and the attitude correction which are the most important key technologies in this software . At the same time, the frame of the whole system, the computer environment, the software development tool are also analysised in detial in this paper. Finally, the stability and accuracy of this software system are verified by the experiment in Guangdong Yamen coastal waterway .

REMOVAL OF HEAVY METAL Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II) IONS FROM AQUEOUS SOLUTION BY MENTHA PIPERITA EXTRACT

2020 ◽  
pp. 15-20
Author(s):  
Ersin Yucel ◽  
Mine Yucel
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
High Efficiency ◽  
Correlation Coefficients ◽  
Langmuir Model ◽  
Mentha Piperita ◽  
Freundlich Model ◽  
Biosorption Capacity ◽  
Peppermint Extract ◽  
The Stability

In this study, the usage of the peppermint (Mentha piperita) for extracting the metal ions [Mg (II), Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II)] that exist at water was investigated. In order to analyze the stability properties, Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms were used at removing the metal ions and the highest correlation coefficients (R2) were obtained at Langmuir isotherm. Therefore, it is seen that the Langmuir model is more proper than the Freundlich model. However, it was found that the correlation coefficients of removing Ni and Cd is higher at Freundlich model than Langmuir and low at Dubinin-Radushkevich isotherm. It is established that the biosorption amount increase depends on the increase of biosorbent and it can be achieved high efficiency (95%) even with small amount (0.6 mg, peppermint extract) at lead ions. It is also determined that the peppermint extracted that is used at this study shows high biosorption capacity for metal ions and can be used for immobilization of metals from polluted areas.

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