Research on Environmental Durability Testing System for Automobile Engine ECU

2011 ◽  
Vol 121-126 ◽  
pp. 2855-2859 ◽  
Author(s):  
Miao Yu ◽  
Lu Shuai ◽  
Jiang Wei Guo ◽  
Jie Fu
Keyword(s):  
Testing System ◽  
Time To Failure ◽  
Durability Test ◽  
Automobile Engine ◽  
Management Software ◽  
Sensor Signals ◽  
Durability Testing ◽  
Environmental Durability ◽  
Testing Management ◽  
Set Up

Based on the principle and specifications of Environmental Durability Test on automobile engine ECU, an open, intelligent and practical ECU durability testing system (EDTS) is designed. The system consisted of a simulation platform and a testing management software. The platform provided stimulating sensor signals and simulation loads, and an online automotive environment was built. The management software sent various instructions to set up the platform and read the ECU running status data. And this EDTS has been applied to test a kind of domestic automobile engine ECU．The experimental results shows that the mean time to failure (MTTF) of ECU samples was improved and the testing period was shortened greatly.

scholarly journals How to Implement Safe, Efficient and Cost-Effective SARS-CoV-2 Testing in Urban and Rural Schools within One Month

COVID ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 717-727
Author(s):  
Parastoo Kheiroddin ◽  
Magdalena Gründl ◽  
Michael Althammer ◽  
Patricia Schöberl ◽  
Linda Plail ◽  
...  
Keyword(s):  
Data Transfer ◽  
Cost Effective ◽  
Testing System ◽  
Successful Implementation ◽  
Rural And Urban ◽  
Local Involvement ◽  
Working Day ◽  
Set Up ◽  
The Individual ◽  
Time Required

(1) Background: With vaccination and new variants of SARS-CoV-2 on the horizon, efficient testing in schools may enable prevention of mass infection outbreaks, keeping schools safe places and buying time until decisions on feasibility and the necessity of vaccination in children and youth are made. We established, in the course of the WICOVIR (Where Is the COrona VIRus) study, that gargle-based pool-PCR testing offers a feasible, efficient, and safe testing system for schools in Germany when applied by central university laboratories. (2) Objectives: We evaluated whether this approach can be implemented in different rural and urban settings. (3) Methods: We assessed the arrangements required for successful implementation of the WICOVIR approach in a variety of settings in terms of transport logistics, data transfer and pre-existing laboratory set-up, as well as the time required to establish the set-up. (4) Results: We found that once regulatory issues have been overcome, all challenges pertaining to logistics, data transfer, and laboratory testing on different platforms can be solved within one month. Pooling and depooling of samples down to the individual test result were achievable within one working day in all settings. Local involvement of the community and decentralized set-ups were keys for success. (5) Conclusion: The WICOVIR gargle-based pool-PCR system is so robust and simple that it can be implemented within one month in all settings now or in future pandemics.

scholarly journals Experiments of Ultrasonic Sensing Using FBG Sensors

2011 ◽  
Vol 2-3 ◽  
pp. 148-152
Author(s):  
Wei Wei Shi ◽  
Ting Ting Hu ◽  
Yue Gang Tan
Keyword(s):  
Tunable Laser ◽  
Angular Separation ◽  
Axial Direction ◽  
Laser Source ◽  
Testing System ◽  
Linear Change ◽  
Ultrasonic Signals ◽  
Response Characteristics ◽  
Ultrasonic Sensing ◽  
Set Up

This research aims at investigating the response characteristics of fiber Bragg grating sensors (FBGs) to ultrasonic signals. The testing system was set up with a tunable laser source and the FBGs installed on the surface of an aluminum plate. Then the response characteristics of FBGs were compared, in condition of putting the ultrasonic driving source in the different longitudinal, lateral and angular separation. Measurements were taken by changing the distance between the sensor and the transducer from 60 mm to 200 mm with a step of 20 mm. Then keeping the distance at 100 mm and 200 mm respectively, do the angular experiment with the angle from 0° to 90° by the step of 10°. Experiment results show that FBG can get better signals when the transducer is along its axial direction. When the location of the transducer is changed linearly, no obvious linear change of the signal strength has been found.

scholarly journals Introduction to an Open Source Internet-Based Testing Program for Medical Student Examinations

2009 ◽  
Vol 6 ◽  
pp. 4 ◽  
Author(s):  
Yoon-Hwan Lee
Keyword(s):  
Operating System ◽  
Medical Education ◽  
Open Source ◽  
System Approach ◽  
Item Analysis ◽  
Database Management System ◽  
School Administrator ◽  
Testing System ◽  
Testing Program ◽  
Set Up

The author developed a freely available open source internet-based testing program for medical examination. PHP and Java script were used as the programming language and postgreSQL as the database management system on an Apache web server and Linux operating system. The system approach was that a super user inputs the items, each school administrator inputs the examinees??information, and examinees access the system. The examinee?占퐏 score is displayed immediately after examination with item analysis. The set-up of the system beginning with installation is described. This may help medical professors to easily adopt an internet-based testing system for medical education.

scholarly journals Development of Vibration Loading Profiles for Accelerated Durability Tests of Ground Vehicles

2011 ◽  
Author(s):  
Ke Xu ◽  
Yan Wu ◽  
Qiong Wu
Keyword(s):  
Time Series ◽  
Ground Vehicles ◽  
Durability Test ◽  
Test Analysis ◽  
Event Identification ◽  
Test Synthesis ◽  
Durability Testing ◽  
Vehicle Test ◽  
Accelerated Durability Test ◽  
Mission Profile

The accelerated durability test can be achieved by using the GlyghWorks software through the process of Mission Profile and Test Synthesis. Mission profile comprises a number of load events that simulate the real world driving conditions, which contain dynamic information about the vehicle. Test Synthesis is accomplished with extracting the information on the frequency of the events expected in the service life. The challenge of accurately separating the time series signal that correlate the load events becomes essential in order to efficiently conduct the accelerated durability test analysis. In this paper, a method is developed for automatic event identification from a time series based on wavelet analysis, clustering, and Fourier analysis, which are applied respectively to denoise, cluster and refine the segmentation of respective events embedded in the time series signal. The identified events and their corresponding data are used to generate the accelerated durability testing profiles. A systematic approach of acceleration time series generation for the partial test based on the durability testing PSD profile will also be shown, and then the created loading profile can be directly applied as the driven profile in the lab test. Subsequently, method of validation process for the partial test will be introduced.

Durability Testing System with Power Recycle for the Variable Displacement Closed-Loop Hydraulic Pumps

2012 ◽  
Vol 241-244 ◽  
pp. 1333-1337
Author(s):  
Hua Bing Wang ◽  
Jun Ke Hu
Keyword(s):  
Closed Loop ◽  
Testing System ◽  
Hydraulic Motor ◽  
Rotating Speed ◽  
Inlet Port ◽  
System Pressure ◽  
Variable Displacement ◽  
Durability Testing ◽  
Pressure Compensation ◽  
Starting Control

A testing system scheme with power recycle for hydraulic pumps’ durability is present, which is based on a hydraulic motor with hydraulicly overridden pressure compensation. The hydraulic motor can adaptively adjust its displacement to meet the demand of displacement match of the power feedback in the system. The system pressure can be set by adjusting the starting control pressure of the motor. The rotating speed of the pump is guaranteed by the control of the driven electrical motor. A hydraulic bridge unit is used to guide the flow from the outport of the pump to the fixed inlet port of the hydraulic motor and thus causes the motor to rotate in a certain direction to drive the pump in order to recycle the power.

The effects of geometrical inaccuracies of the experimental set-up on small punch creep test results

2014 ◽  
Vol 49 (8) ◽  
pp. 571-582 ◽  
Author(s):  
Francesco Cortellino ◽  
Wei Sun ◽  
Thomas H Hyde ◽  
John Shingledecker
Keyword(s):  
Creep Test ◽  
Three Dimensional ◽  
Initial Position ◽  
Creep Testing ◽  
Time To Failure ◽  
Test Rig ◽  
Small Punch ◽  
Testing Procedures ◽  
Loading Direction ◽  
Set Up

The small punch creep testing technique is able to provide creep properties from a very small amount of material. However, a universal and robust technique, to convert small punch creep testing results to corresponding uniaxial creep test data, has still not been established. In addition, the experimental output can be affected by several sources of uncertainty, such as friction between the components of the test rig and the specimen, and inaccuracies in the geometry of the experimental set-up and the testing procedures. This article reports the results of three-dimensional elastic/creep finite element analyses of small punch creep testing, taking into account geometrical inaccuracies in the initial punch position and the loading direction. The results of the calculations show that the initial position of the punch and the loading direction can considerably affect the variation in the specimen’s central deflection with time and the final time to failure. The minimum displacement rate was found to decrease when the punch moves away from the centre of the specimen and when the angle between the loading direction and the axis of the test rig increases. The time to failure increases when the punch deviates from the perfect axi-symmetric configuration. The effects of the direction of the load increase as the initial distance of the punch from the centre of the specimen increases. Analytical correlations, corresponding to the inaccuracies investigated, are also proposed.

Testing System Set-Up to Evaluate Acoustic Induced Vibration

2016 ◽  
Author(s):  
J. Adin Mann ◽  
Daniel Eilers ◽  
Trent Jackson ◽  
Rob Swindell ◽  
Christopher Middleton ◽  
...  
Keyword(s):  
Computational Models ◽  
Rank Order ◽  
Acoustic Power ◽  
Dynamic Strain ◽  
Testing System ◽  
Piping System ◽  
Acceleration Response ◽  
Strain Data ◽  
Noise Input ◽  
Set Up

A consortium of companies is collaborating in a Joint Industry Project (JIP) for Acoustic Induced Vibration (AIV). Laboratory testing is one of the work areas of the JIP. The goals of the tests are to evaluate typical pipe fittings for AIV induced fatigue, to rank order their AIV risk and to obtain data for validation of computational models. An NPS6x8 (6R8) pressure safety valve was the flow and noise input to a 10S piping system, which consisted of an NPS12 tailpipe input into an NPS12x20 tee. Small bore connectors (SBCs) were included in both the NPS12 tailpipe and the NPS20 header. The type of fitting used as the connection between the SBC and the pipe was varied. The system was operating in a Carucci-Mueller acoustic power of around 175 dB. Vibration acceleration response of the system was measured, and dynamic strain data was also gathered to evaluate fatigue life. The piping and data acquisition system setup will be discussed along with the type of results that are being obtained.

scholarly journals Wattle and Daub Experimental Workshop: Durability Testing after 14 years of Uninterrupted Use

2018 ◽  
Vol 3 (12) ◽  
pp. 78-83
Author(s):  
María Guadalupe Cuitiño Rosales ◽  
Alfredo Esteves
Keyword(s):  
Optimum Condition ◽  
Thermal Energy ◽  
Auxiliary Heating ◽  
Energy Research ◽  
Durability Test ◽  
Durability Testing ◽  
Experimental Workshop ◽  
The City ◽  
Useful Lifetime ◽  
Over Time

An important factor to analyze when studying the useful lifetime of earth constructions is the detection of any constructive pathologies that may occur; an important consideration when building a house; yet in Argentina information on building with wattle and daub is scarce. This paper describes a durability test conducted on an experimental workshop built with wattle and daub technology in 2004, in the city of Mendoza, Argentina. The building has a floor area of 33.63 m2 (5.70 m x 5.90 m), and houses an experimental workshop for thermal energy research and the construction of solar equipment. During the 14 years that the workshop has been in use, the wattle and daub walls have been exposed to various environmental forces, such as rain, wind, and earthquakes. However, its thermal behavior has remained constant over time, maintaining a difference in temperature of 5.8ºC between the inside and outside without auxiliary heating. In general, the construction has been well-preserved and serves the purpose for which it was built, thus proving that wattle and daub constructions will remain in optimum condition for at least 14 years with minimal maintenance required to prevent surface materials from deteriorating.

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