scholarly journals The problems in in the qualification of measuring systems abilities in the investigation performance, the analysis on the example of precision workpieces in the automotive industry

2018 ◽  
Vol 19 (9) ◽  
pp. 147-151
Author(s):  
Magdalena Garbaciak ◽  
Emilia Bachtiak-Radka ◽  
Sara Dudzińska ◽  
Daniel Grochała
Keyword(s):  
Surface Roughness ◽  
Measurement System ◽  
Automotive Industry ◽  
Point Of View ◽  
Measuring Systems ◽  
Measurement Systems ◽  
Measurement Plan ◽  
Standard Edition

The manuscript introduce the problems in the qualification of measuring systems abilities in the investigation in the surface roughness of precision workpieces in the automotive industry. The research were carried out in accordance with the measurement plan. Next, based on the collected results for selected SPG parameters, the analysis and assessment of the capacity indicators were carried out in accordance with the procedure 2 of statistical qualification of measurement systems (in accordance with the MSA 2010 standard edition 4, ARM, tolerance). Two products were analyzed of the cylinder fragment and labyrinth valves of automatic gearboxes. The analysis gave a series of information on errors from the point of view of reproducibility and recurrence on the ability of the measurement system - the analyzes were carried out for the needs of the automotive industry.

scholarly journals IMPLEMENTATION OF SYMMETRIC CRYPTOGRAPHY IN EMBEDDED MEASUREMENT SYSTEMS

2015 ◽  
pp. 66-76
Author(s):  
Wiesław Winiecki ◽  
Piotr Bilski
Keyword(s):  
Embedded Systems ◽  
Measurement System ◽  
Point Of View ◽  
Distributed Environments ◽  
Future Prospects ◽  
Symmetric Cryptography ◽  
Measuring Systems ◽  
Measurement Systems ◽  
Aes Algorithm ◽  
Distributed Measurement

The paper presents the implementation of the symmetric cryptography in the distributed measurement system. Motivation for increasing the security in such systems is presented. Next, fundamentals of cryptography from the measuring systems’ point of view are introduced. The role and structure of embedded systems in modern distributed environments is explained. As the example of presented problems, implementation of the AES algorithm on the Compact RIO module is presented and tested for both efficiency and accuracy. The paper is supplemented with conclusions and future prospects of the approach.

Surviving the Management Game: Workload Measurement Systems in a Cost-Conscious Environment

1993 ◽  
Vol 60 (1) ◽  
pp. 23-28 ◽  
Author(s):  
Maureen Wright ◽  
Elizabeth Scott ◽  
Rhonda Cockerill
Keyword(s):  
Health Care ◽  
Occupational Therapy ◽  
Measurement System ◽  
Point Of View ◽  
Health Science ◽  
Management Tools ◽  
Measurement Systems ◽  
Client Care ◽  
Workload Measurement ◽  
Science Centre

Using a procedure-based occupational therapy workload measurement system developed at, and applied by, Sunnybrook Health Science Centre, this paper explores the objectives of such a system from the point of view of the occupational therapy manager. It also takes into account the synergistic relationship between the occupational therapist and the administrative/business aspect of health care, paying special attention to past and present trends in health-care accountability. In this paper it is argued that occupational therapy managers must relate their procedures and overhead costs to actual client care, if they are to be included in programme management and client costing. The process used by occupational therapy to describe its own procedures for the system is outlined. The system was then developed in conjunction with other institutional, financial and management tools for the client cost conversion process. By using a procedure based workload measurement system, occupational therapy is able to accurately describe client costing, thereby articulating our role in client care.

scholarly journals Performance of snow density measurement systems in snow stratigraphies

2020 ◽  
Author(s):  
Jiansheng Hao ◽  
Farong Huang ◽  
Ditao Cheng ◽  
Shuyong Mu ◽  
Lanhai Li
Keyword(s):  
Dielectric Permittivity ◽  
Measurement System ◽  
Density Measurement ◽  
Snow Density ◽  
Gravimetric Measurement ◽  
Measuring Systems ◽  
Measurement Systems ◽  
Permittivity Measurement ◽  
Wet Snow ◽  
Precision And Accuracy

Abstract. Gravimetric and dielectric permittivity measuring systems are applied to measure snow density, but few studies have addressed differences between the two measurement systems under complex snowpack conditions. A field experiment was conducted to measure snow density using the two measurement systems in different stratigraphical layers consisting of fragmented precipitation particles (DF), faceted crystals particles (FC), depth hoar (DH) and melt forms (MF), and the performance of measurement systems were analyzed and compared. The results showed that the measured density from the gravimetric measurement system was significantly higher than from the dielectric permittivity measurement system. The precision and accuracy of the gravimetric measurement system was higher than that of the dielectric permittivity measurement system in the DF, FC and DH layers, but the precision and accuracy of two measurement systems were similar in the MF layers. By comparing the precision and accuracy as well as merits and drawbacks of the two measurement systems, it was concluded that using gravimetric measurement system during dry snow and dielectric permittivity measurement system during wet snow will help surveyors obtain more reliable data. Furthermore, the study provided an approach which will facilitate the integration of the data obtained from different studies with different measurement systems into global databases.

Online-Messung bei der Drehbearbeitung*/Online measurement for turning operations

2018 ◽  
Vol 108 (05) ◽  
pp. 359-363
Author(s):  
E. Uhlmann ◽  
T. Holznagel ◽  
L. Prasol
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Surface Finish ◽  
Measurement System ◽  
Machine Tools ◽  
Optical Measurement ◽  
Quality Criterion ◽  
Online Measurement ◽  
Turning Operations ◽  
Measurement Systems

Oberflächengüten und geometrische Bauteiltoleranzen sind ein entscheidendes Qualitätskriterium in der Fertigung. Die resultierenden Rauheiten und Bauteildurchmesser sind dabei vom Werkzeugverschleiß abhängig und werden nach der Bearbeitung häufig mittels taktiler Messgeräte geprüft. Am Institut für Werkzeugmaschinen und Fabrikbetrieb (IWF) wurde ein optisches Messsystem entwickelt, das mithilfe eines Lasers eine Online Bauteildurchmesser- sowie Rauheitsmessung während der Drehbearbeitung erlaubt.   Surface finish quality and component tolerances are a critical quality criterion in production. The resulting surface roughness and workpiece diameters depend on tool wear and are usually inspected with tactile measurement systems after machining. At the Institute for Machine Tools and Factory Management (IWF), an optical measurement system was developed which employs a laser and enables the online measurement of workpiece diameters and surface roughness for turning processes.

scholarly journals Development of Thermal Performance Metrics for Direct Gas-Fired Circulating Heaters

Agriculture ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 588
Author(s):  
Benjamin C. Smith ◽  
Brett C. Ramirez ◽  
Steven J. Hoff
Keyword(s):  
Mass Flow ◽  
Measurement System ◽  
Thermal Efficiency ◽  
Performance Metrics ◽  
Standardized Test ◽  
Flow System ◽  
Standard Test ◽  
Testing System ◽  
Measurement Systems ◽  
Selection Of

Many climate-controlled agricultural buildings use direct gas-fired circulating heaters (DGFCH) for supplement heat. There is no standardized test to calculate thermal efficiency for these heaters. This study aimed to develop a measurement system and analytical analysis for thermal efficiency, quantify the measurement uncertainty, and assess economics of DGFCH efficiency. The measurement system developed was similar to the ASHRAE 103 standard test stand with adaptations to connect the apparatus to the DGFCH. Two different propane measurement systems were used: input ratings < 30 kW used a mass flow system and input ratings > 30 kW used a volumetric gas meter. Three DGFCHs (21.9, 29.3, 73.3 kW) were tested to evaluate the system. Thermal efficiencies ranged from 92.4% to 100.9%. The resulting uncertainty (coverage factor of 2; ~95% Confidence Interval) ranged from 13.1% to 30.7% for input ratings of 56.3 to 11.4 kW. Key sources of uncertainty were propane and mass flow of air measurement. The economic impact of 1% difference in thermal efficiency ranged from USD $61.3 to $72.0 per heating season. Refinement of the testing system and procedures are needed to reduce the uncertainty. The application of this system will aid building designers in selection of DGFCHs for various applications.

scholarly journals Selective laser melting for improving quality characteristics of a prism shaped topology injection mould tool insert for the automotive industry

2021 ◽  
pp. 095440622198938
Author(s):  
Mennatallah F El Kashouty ◽  
Allan EW Rennie ◽  
Mootaz Ghazy ◽  
Ahmed Abd El Aziz
Keyword(s):  
Surface Roughness ◽  
Selective Laser Melting ◽  
Automotive Industry ◽  
Injection Moulding ◽  
Dimensional Accuracy ◽  
Quality Characteristics ◽  
Surface Topology ◽  
Laser Melting ◽  
Injection Mould ◽  
Tool Insert

Manufacturing process constraints and design complexities are the main challenges that face the aftermarket automotive industry. For that reason, recently, selective laser melting (SLM) is being recognised as a viable approach in the fabrication of injection moulding tool inserts. Due to its versatility, SLM technology is capable of producing freeform designs. For the first reported time, in this study SLM is recognized for its novel application in overcoming fabrication complexities for prism shaped topology of a vehicle headlamp’s reflector injection moulding tool insert. Henceforth, performance measures of the SLM-fabricated injection mould tool insert is assessed in comparison to a CNC-milled counterpart to improve quality characteristics. Tests executed and detailed in this paper are divided into two stages; the first stage assesses both fabricated tool inserts in terms of manufacturability; the second stage assesses the functionality of the end-products by measuring the surface roughness, dimensional accuracy and light reflectivity from the vehicle reflectors. The results obtained show that employing SLM technology can offer an effective and efficient alternative to subtractive manufacturing, successfully producing tool inserts with complex surface topology. Significant benefits in terms of surface roughness, dimensional accuracy and product functionality were achieved through the use of SLM technology. it was concluded that the SLM-fabricated inserts products proved to have relatively lower values of surface roughness in comparison to their CNC counterparts.

The Properties of Welded Joints Made by 6082-T6 Aluminium Alloy and their Behaviour under Cyclic Loading Conditions

2015 ◽  
Vol 812 ◽  
pp. 375-380 ◽  
Author(s):  
D. Pósalaky ◽  
János Lukács
Keyword(s):  
Cyclic Loading ◽  
Automotive Industry ◽  
Welded Joints ◽  
Structural Engineering ◽  
Physical Simulation ◽  
Base Material ◽  
Point Of View ◽  
Test Results ◽  
Structural Elements ◽  
Effective Use

The magnitude of different aluminium alloys, especially the ones with higher strength, are increasing in the structural engineering, not just the usual applications (like the aerospace industry) but more likely in the automotive industry. There are more assumptions of the effective use of aluminium; we should highlight two important factors, the technological and the applicability criterions. The technological criterion is the joining of structural elements, frequently with welding thus the technological criterion ultimately is the weldability. The assumption of applicability comes from the loading capability of these structures, which is typically cyclic loading so the key issue from the point of view of applicability is the resistance to fatigue. This article represents physical simulation and fatigue test results both on the base material and on the welded joints.

scholarly journals Simulation Analysis of Magnetic Gradient Full-Tensor Measurement System

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Lei Xu ◽  
Ning Zhang ◽  
Liqing Fang ◽  
Huadong Chen ◽  
Pengfei Lin ◽  
...  
Keyword(s):  
Magnetic Dipole ◽  
Measurement System ◽  
Measurement Accuracy ◽  
Simulation Analysis ◽  
Magnetic Gradient ◽  
Measurement Systems ◽  
Magnetometer Array ◽  
Array Structure ◽  
Simulation Results ◽  
Planar Measurement

The magnetic gradient full-tensor measurement system is diverse, and the magnetometer array structure is complex. Aimed at the problem, seven magnetic gradient full-tensor measurement system models are studied in detail. The full-tensor measurement theories of the tensor measurement arrays are analyzed. Under the same baseline distance, the magnetic dipole model is used to simulate the measurement system. Based on different measurement systems, the paper quantitatively compares and analyzes the error of the structure. A more optimized magnetic gradient full-tensor measurement system is suggested. The simulation results show that the measurement accuracy of the planar measurement system is slightly higher than that of the stereo measurement system. Among them, the cross-shaped and square measurement systems have relatively smaller structural errors and higher measurement accuracy.

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