Evaluation of Capability of Measuring Device on the Basis of Diagnostics

2013 ◽  
Vol 308 ◽  
pp. 69-74 ◽  
Author(s):  
Ľuboslav Straka ◽  
Ivan Čorný ◽  
Radoslav Kreheľ
Keyword(s):  
Repeated Measurements ◽  
Measuring Instrument ◽  
Tolerance Range ◽  
Tolerance Zone ◽  
Measuring Range ◽  
Measuring Device ◽  
Capability Index ◽  
Measuring Devices ◽  
Capability Evaluation ◽  
The Given

In capability evaluation of measuring devices on the basis of diagnostics, it is important to compare variability of measurement with certain proportion of tolerance zone width of observed qualitative parameter. Determined index of capability of particular measuring device indicates its applicability for inspection of selected qualitative parameters in a given tolerance range. The paper is focused on evaluation of capability of digital micrometer DIGIMATIC within its entire measuring range (0 to 25mm) by the means of capability index Cgm and Cgmk. Evaluation of capability of the given measuring device was carried out by repeated measurements of standards with dimensions representing lower, middle and upper range of the measuring instrument at given accuracy (2μm) of measuring device.

scholarly journals Research on Pressure Measuring Device with Magnetic Fluid

2022 ◽  
Vol 2160 (1) ◽  
pp. 012079
Author(s):  
Ruican Hao ◽  
Zhixin Feng ◽  
Huagang Liu ◽  
Shang Wang ◽  
Feifei Xing ◽  
...  
Keyword(s):  
Magnetic Fluid ◽  
The Other ◽  
Measuring Range ◽  
Measuring Device ◽  
Measuring Devices ◽  
Measuring Efficiency ◽  
Novel Material ◽  
Large Cylinder ◽  
Working Principle ◽  
Pressure Measuring Device

Abstract Magnetic fluid is a novel material which could be applied in many fields including sensors, sealings, bilmedicines, and so on. Its super magnetism and fluidity could be used in the sensor as an inducting core. Magnetic fluid and its characteristics were introduced to adapt to the application in the pressure measuring devices. A pressure measuring device with magnetic fluid was proposed and the structure was analyzed and designed according to the characteristics of magnetic fluid. The working principle of pressure measuring device with magnetic fluid was analyzed, and the structure of pressure measuring device was designed and reformed to avoid the overflow and recovery of excessive of magnetic fluid. One arm of the U tube was designed to be a large cylinder to storage large quantities of magnetic fluid. The higher the required precision is, the larger the diameter of one arm should be designed with respect to the other arm of the tube. The measuring range of designed device could also be adjusted as needed. The measuring efficiency of the device could be improved by the designing and reforming work.

DEVELOPMENT OF MACAMI (MARI MEMBACA DAN MEMAHAMI) INSTRUMENT USING MACROMEDIA FLASH 8 IN PRIMARY SCHOOLS

2020 ◽  
Vol 4 (3) ◽  
pp. 544
Author(s):  
Ermaida Dewi
Keyword(s):  
Reading Comprehension ◽  
Primary School ◽  
Product Design ◽  
Primary Schools ◽  
Measuring Instrument ◽  
School Students ◽  
Average Percentage ◽  
Measuring Devices ◽  
Comprehension Ability ◽  
Feasibility Test

The background of this research is an instrument of learning for reading comprehension which in general is still dominated by an instrument in the form of print out which makes the students’ interest to read is reduced. In addition, this instrument is usually done manually or handwritten so that the students’ work must be corrected manually and require some time to get the results. This study aims to develop instruments or measuring devices for reading comprehension in the Primary School in Pekanbaru and find out the feasibility of measuring devices for reading comprehension skills. This product is Macromedia Flash 8 based namely "MaCaMi" which stands forMari Membaca dan Memahami. The research method used was the 4D model with four stages, such as the define stage, the design phase, the develop phase, and the dessiminate stage which is limited to the third stage. The data of this study were obtained from product design expert validation questionnaire, questionnaire validated by linguists, teacher response questionnaire and students response questionnaire. The data were generated quantitatively and analyzed by using the assessment criteria to determine the product quality. The results of this study showed the assessment of product design experts in draft 1 had an average percentage of 69.61% with the appropriate category then had increased in draft 2 to 90.56% with the very feasible category. The results of  the feasibility test by linguists in draft 1 with had average percentage of 95.30% with the very feasible category then increased in draft 2 to 97.20% withn the very feasible category. The results of the teacher's response to the reading comprehension measuring instrument in the Primary School in Pekanbaru developed by researchers obtained an average percentage of 93.50% with a very good category and the results of students' responses to the measuring instrument obtained an average percentage of 89.90% with a category very good. Based on these results, it can be concluded that the product developed by researchers is feasible to be used as a measure of reading comprehension ability of primary school students.

“Who is there that doesn't calculate?” Homo economicus as a measuring instrument in non-market accounting

2021 ◽  
pp. 1-21
Author(s):  
Oliver Schlaudt
Keyword(s):  
Measuring Instrument ◽  
Narrow Sense ◽  
Homo Economicus ◽  
Measuring Device

Abstract Contemporary approaches to “non-market accounting” depend critically on methods of “monetization”, i.e. determining prices for goods outside the market. Monetization constitutes a case of economic measurement in a narrow sense that has not yet been analysed in the literature on measurement in economics. Monetization, I will argue, uses homo economicus – originally created as a model to explain existing prices – as a measuring device, one that generates new prices for goods that are not traded on markets. Homo economicus, though long contested in microeconomics, is thus enjoying a dubious revival in non-market accounting.

scholarly journals Range Automatic Adjusted Current Transformer Primary Winning

2021 ◽  
Vol 12 (3) ◽  
pp. 3142-3147
Author(s):  
Amirov Sultan Fayzullayevich Et.al
Keyword(s):  
Correction Factor ◽  
Driving Forces ◽  
Operating Mode ◽  
Current Transformer ◽  
Measuring Range ◽  
Secondary Current ◽  
Measuring Devices ◽  
The Difference ◽  
Protection And Control ◽  
And Control

The article discusses the issue of introducing a correction factor for protection and control devices, as the value of the secondary current in a certain range of the auto-adjustable current transformer does not correspond to the value of the secondary current in another range determined by the difference of magnetic driving forces generated by the components of the primary current. Alternatively, an algorithm has been developed to account for the measurement error in this condition in an automatic system that controls the operating mode of the current transformer. It was also found that the output data should be transmitted taking into account the correction factor in order to ensure the proper operation of the protection and measuring devices when the current transformer is switched to another measuring range in the measuring range.

Evaluation of Deviation Zone Based on Maximum Conformance to Tolerances

2011 ◽  
Author(s):  
Ahmad Barari
Keyword(s):  
Closed Loop ◽  
Evaluation Process ◽  
Accurate Estimation ◽  
Tolerance Zone ◽  
Coordinate Metrology ◽  
Inspection Process ◽  
Geometric Deviations ◽  
The Given ◽  
Best Fit ◽  
Deviation Zone

The accurate estimation of the geometric deviations is not possible only by manipulating the Euclidian distances of the discrete measured points from substitute geometry. The real geometric deviations of a measured surface need to be calculated based on the desired tolerance zone of the surface. This fact is usually neglected in common practices in the coordinate metrology of surfaces. The importance of considering the desired tolerance zone in estimation of the optimum deviation zone is demonstrated in this paper. Then a best fit method is presented which complies with the tolerance requirements of the designed surface. The developed fitting methodology constructs a substitute geometry to minimizes the residual deviations corresponding to the given tolerance zone and the needs of down-stream operations that use the results of the inspection process. It is shown how the developed objective function can be adopted for a case of closed-loop manufacturing process, when the under-cut residual deviations of the manufactured part can be corrected by a down-stream operation. In order to validate the proposed methodology, experiments are conducted. The results show a significant reduction of uncertainties in coordinate metrology of geometric surfaces. Implementation of this method directly results in increasing the accuracy of the entire tolerance evaluation process, and less uncertainty in quality control of the manufactured parts.

Comparative Analysis of Volumetric Properties for Superpave Gyratory Compactors

2000 ◽  
Vol 1712 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Yetkin Yildirim ◽  
Mansour Solaimanian ◽  
Robert B. McGennis ◽  
Thomas W. Kennedy
Keyword(s):  
Comparative Analysis ◽  
Specific Gravity ◽  
Volumetric Properties ◽  
Standard Protocol ◽  
Tolerance Range ◽  
The Given

The experience with the original Superpave gyratory compactors (SGCs) introduced into the paving industry in 1994 was very positive. Consequently, since 1995 several additional manufacturers have developed SGCs to meet the growing demand for such devices. Although these units generally meet the broad requirements of the original SGC specification developed by FHWA, their basic designs are somewhat different. To ensure a systematic means for evaluation of the compactors, FHWA developed a standard protocol, designated AASHTO PP35. This procedure was used to evaluate various gyratory compactors. By using the discriminating value of 0.010 for difference in bulk specific gravity ( Gmb), the compactors were evaluated in terms of Gmb. The five gyratory compactors evaluated were the Rainhart, Test Quip, Troxler Electronic Laboratories, Inc. (Troxler), Model 4141, Pine Instrument Company (Pine) Model AFG1A, and Interlaken compactors. These compactors were compared with either Pine Model AFGC125X (Pine 1) or Troxler Model 4140 (Troxler 1) SGCs, which were used as reference compactors. In addition, the project included a comparison of two Pine compactors (Pine 1 and Pine 2) of the same model (AFGC125XS) with each other. A total of 336 specimens (48 specimens for each compactor) were prepared for all the compactors to fulfill the comparison. Eleven comparisons of each candidate compactor and the reference compactor were made during a 12-month period. All of the candidate compactors compared favorably with an existing SGC. It was found that all seven compactors would provide the same results within the given tolerance range under the rigid conditions of the AASHTO PP35 protocol.

scholarly journals Raspberry Pi-Based Low-Cost Connected Device for Assessing Road Surface Friction

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 341 ◽  
Author(s):  
Miha Ambrož ◽  
Uroš Hudomalj ◽  
Alexander Marinšek ◽  
Roman Kamnik
Keyword(s):  
Traffic Safety ◽  
Road Network ◽  
Low Cost ◽  
Measurement Data ◽  
Automatic Measurement ◽  
Raspberry Pi ◽  
Measuring Device ◽  
The Road ◽  
Measuring Devices ◽  
On The Road

Measuring friction between the tyres of a vehicle and the road, often and on as many locations on the road network as possible, can be a valuable tool for ensuring traffic safety. Rather than by using specialised equipment for sequential measurements, this can be achieved by using several low-cost measuring devices on vehicles that travel on the road network as part of their daily assignments. The presented work proves the hypothesis that a low cost measuring device can be built and can provide measurement results comparable to those obtained from expensive specialised measuring devices. As a proof of concept, two copies of a prototype device, based on the Raspberry Pi single-board computer, have been developed, built and tested. They use accelerometers to measure vehicle braking deceleration and include a global positioning receiver for obtaining the geolocation of each test. They run custom-developed data acquisition software on the Linux operating system and provide automatic measurement data transfer to a server. The operation is controlled by an intuitive user interface consisting of two illuminated physical pushbuttons. The results show that for braking tests and friction coefficient measurements the developed prototypes compare favourably to a widely used professional vehicle performance computer.

Low cost Evaporometers

2020 ◽  
Author(s):  
Adam Tejkl ◽  
Petr Kavka
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Polarity Reversal ◽  
Measuring Range ◽  
Research Staff ◽  
Research Project ◽  
Ongoing Research ◽  
Measuring Device ◽  
Printed Circuit ◽  
3D Printed

<p>Research of the evaporation from the water surface is curtailing for measuring the water balance in small catchments.</p><p>An ongoing project aims to develop a simple and reliable, easy to reproduce evaporation measuring device. A core part of the device is measuring the water level in the field in cheap form. 3D printed design in combination with open-source cheap electronics is utilized. Methodology and results of the ongoing research project will be presented. The project investigates the affordable and simple technical measures that have the potential to increase the number of opportunities for the measuring of evaporation.</p><p>Continuously the theories are developed and tested, subsequently, conclusions are implemented into the next generation of the device. Five generations of 3D printed part have been done, and now the research focus on the electrical and software part of the device. Durability and reliability of the device are tested in the field, in three locations. All plots are also frequently checked by research staff and data is saved and later compared with data measured by the device. Refilling of the evaporation pan is also done by research staff.</p><p>Prototype 3 used the experience of all previous prototypes. The construction is equipped with 5 sets of electrodes, each with a measuring range of 10 mm. The total measuring range is 50 mm. The whole structural part of prototype 3 is designed as a printout on a 3D printer, electrodes are printed from a conductive material. Above the electrodes, there is a printed circuit board carrying the microelectronics control module.</p><p>The principle of measurement consists of gradual interrogation of the set of electrodes, a subsequent reversal of polarity and repeated interrogation. This cycle is repeated several times and the result is averaged, then the next set is measured. The polarity reversal is controlled by the relay. Thanks to the use of printed circuit board it was possible to simplify the device, so only 7 wires, one analog output, polarity reversal control and supply wire to 5 sets of electrodes are led from the whole device.</p><p>An important step in the evaluation of the obtained data (the values of current passed through the water), is its analysis. Because values are read very often they differ only slightly. A commonly used vapor unit is mm of water column per day. It is, therefore, necessary to analyze a long time series, at least longer than one day, and covering the entire day from 00:00 to 23:59.</p><p>The testing sites are the grounds of the CTU Faculty of Civil Engineering in Dejvice, the experimental sites of the CULS in Prague Suchdol and the Water Research Institute in Prague Podbaba.</p><p>The research is funded by the Technological Agency of the Czech Republic (research project TJ02000351 - Development of Tools and Methods Improving Estimation of annual Evaporation Balance).</p>

Profile Characterization of Manufactured Surfaces Using Random Function Excursion Technique—Part 1: Theory

1975 ◽  
Vol 97 (1) ◽  
pp. 190-195 ◽  
Author(s):  
T. S. Sankar ◽  
M. O. M. Osman
Keyword(s):  
Surface Texture ◽  
Low Cost ◽  
Measuring Device ◽  
Rolling Circle ◽  
Measuring Devices ◽  
Texture Parameters ◽  
Probability Densities ◽  
On Line ◽  
Excursion Probability

This paper discusses a new approach for describing accurately the typology of manufactured surfaces. The method employs the theory of stochastic excursions to characterize the surface texture in the amplitude and lengthwise directions. The mathematical principle behind the approach is briefly explained, and it is shown that an accurate description of the roughness can be obtained from the knowledge of the intercept probabilities of the crest and valley excursions of the surface texture about any given level, say the CLA value, specified with respect to the mean line. Based on the preceding excursion probability densities, new surface texture parameters are proposed. These parameters may be computed directly from the surface roughness data obtained from commercially available measuring devices. On the basis of this investigation, it is feasible to develop a low-cost measuring device for “on-line” surface evaluation in production. It is also shown that the sampling length provides a geometrically well-defined filter characteristic similar to that of the rolling circle radius in the E-system.

scholarly journals Pengembangan Alat Peraga Pengukur Debit Air Menggunakan Sensor Flow Berbasis Arduino Sebagai Media Pembelajaran Fluida

2019 ◽  
Vol 12 (1) ◽  
pp. 38-45
Author(s):  
Fita Tri Wahyuningsih ◽  
Yusro Al Hakim ◽  
Ashari Ashari
Keyword(s):  
Physics Education ◽  
Water Discharge ◽  
Measurement Data ◽  
Flow Sensor ◽  
Measuring Instrument ◽  
Research Subjects ◽  
Measuring Device ◽  
Average Percentage ◽  
Teaching Aids

Research has been carried out on the development of teaching aid for measuring water debit using an Arduino based flow sensor as a medium of fluid learning in order to determine the feasibility of a water discharge measuring instrument developed as a fluid learning media. This research is development research consisting of the stages of data collection, product design, design validity, design revision, limited trials. The research subjects for the limited trial were the 4th-semester students of the Physics Education Study Program, Muhammadiyah University Purworejo with 19 students. The product developed is a water discharge measuring device that uses an Arduino-based flow sensor as a fluid learning media through the validation stage by experts. Furthermore, the product is revised and limited to trial. From the results of the trial of the tool carried out the Water Discharge Gauge using an Arduino-based Flow Sensor obtained a debit of (3.80 ± 0.13) liters/minute. While the data from the test results taken manually were debit at (3.55 ± 0.31) liters/min. With a relative error that is very small, with a comparison of sensor and manual measurement data on water discharge of 3.40%. This shows the value of the measurement accuracy is very good. From the results of the validation carried out by the validator namely expert lecturers and peers, it was found that the quality of the teaching aids was included in the excellent category with an average percentage of 76% and the quality of the guidebook was included in the excellent category with an average percentage gain of 78%. A limited trial was conducted by conducting a practicum using a water discharge measuring instrument using an Arduino-based flow sensor, then the results of the student questionnaire responses resulted in a percentage value of 87.22% with very good criteria. Thus the Water Discharge Measuring Tool using Arduino Based Flow Sensors is feasible to be used in Fluid material experiments.

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