scholarly journals Development of a Position Measuring Device of a Deep-Sea Pipeline Based on Flange Center Positioning

2020 ◽  
Vol 8 (2) ◽  
pp. 86
Author(s):  
Zhuo Wang ◽  
Hong-xing Dang ◽  
Tao Wang ◽  
Bo Zhang
Keyword(s):  
Transmission Coefficient ◽  
Deep Sea ◽  
Measurement Data ◽  
Outer Wall ◽  
Large Error ◽  
Measuring Device ◽  
Outer Circle ◽  
Measuring Devices ◽  
Oil Pipelines ◽  
Positioning Method

A deep-sea pipeline position and attitude-measuring device based on pipeline outer circle positioning can measure the spatial relative positions of the end faces of two oil pipelines in the deep sea. This device can provide the necessary data to make a transition pipeline connecting two sections of oil pipelines together. However, after analyzing the data measured by this device, it is found that the measurement data has a large error because the error transmission coefficient of the measurement value is too large. In order to reduce the error transfer coefficient, a new measuring device for measuring the posture of deep-sea pipelines by a tensioning rope was proposed. Unlike previous measuring devices, this measuring device is based on the positioning of the flange center of the pipe instead of the pin on the outer circle of the pipe. With the comparison of positioning methods between fixing in the center of flange and fixing the outer wall of pipeline, the former can reduce the transition matrix in the process of solving the relative position of the two pipes, and then reduce the magnification of the measurement sensor error. It also reduces two measurement parameters. The solving formula of the position and attitude of the measuring device based on the outer circle positioning of the pipeline is analyzed. It is proved that the error transmission coefficient of the measuring device based on the flange center positioning is smaller. Experiments show that compared with the positioning method based on the outer circle of the pipe, the positioning method based on the flange center has a higher accuracy.

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.

scholarly journals Dynamic torque calibration by means of model parameter identification

ACTA IMEKO ◽  
2015 ◽  
Vol 4 (2) ◽  
pp. 39 ◽  
Author(s):  
Leonard Klaus ◽  
Barbora Arendacká ◽  
Michael Kobusch ◽  
Thomas Bruns
Keyword(s):  
Frequency Response ◽  
Dynamic Behaviour ◽  
Measurement Data ◽  
Model Parameters ◽  
Dynamic Calibration ◽  
Extended Model ◽  
Unknown Parameters ◽  
Measuring Device ◽  
Torque Transducer ◽  
Least Squares Approach

For the dynamic calibration of torque transducers, a model of the transducer and an extended model of the mounted transducer including the measuring device have been developed. The dynamic behaviour of a torque transducer under test is going to be described by its model parameters. This paper describes the models with these known and unknown parameters and how the calibration measurements are going to be carried out. The principle for the identification of the transducer's model parameters from measurement data is described using a least squares approach. The influence of a variation of the transducer's parameters on the frequency response of the expanded model is analysed.

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.

scholarly journals Sound velocity in the deep sea: Examination of measurement data obtained from a deep submergence vehicle

1993 ◽  
Vol 94 (3) ◽  
pp. 1803-1803
Author(s):  
Toshio Tsuchiya ◽  
Yasutaka Amitani ◽  
Hiroshi Ochi ◽  
Toshiaki Kikuchi
Keyword(s):  
Sound Velocity ◽  
Deep Sea ◽  
Measurement Data

scholarly journals PERANCANGAN ALAT UKUR INTENSITAS CAHAYA BERBASIS ARDUINO LEONARDO MENGGUNAKAN SENSOR LDR (Light Dependent Resistor)

2020 ◽  
Vol 16 (1) ◽  
pp. 1-13
Author(s):  
Simson Manik ◽  
Abdul Muis Muslimin ◽  
Aries A. Subgan
Keyword(s):  
Light Intensity ◽  
Comparative Data ◽  
Primary Data ◽  
Average Error ◽  
Measuring Device ◽  
Measuring Devices ◽  
Vertical Distance ◽  
Light Sensor ◽  
The Difference ◽  
Error Percentage

Lux meter is a device used to measure the intensity of light in an area. The purpose of this thesis is to design a light intensity measuring device using LDR components as a light sensor, comparing light intensity measuring devices made using LDR sensors and Arduino Leonardo based microcontrollers with standard tools. The data used in this study are primary data. The data obtained is then processed using MS. Excel. The type of light bulbs used are Philips CFL (Philips Essential) lamps, each lamp having a power of 5, 8, 11, 14, 18, 23, 27, 32, 35, and 50 watts with a luxmeter vertical distance of 1, 2 and 3 meters from the lamp. From the results of testing the tools and processing of comparative data between the Lux Meter Standard and the designed Lux ​​Meter obtained as follows: the vertical distance of the tool by 1 meter from the lamp produces an average error difference of 12,571 lx and the percentage of average errors the average is 8.77%, while for the vertical distance of the tool is 2 meters from the lamp the average error difference value is 2,358 lx and the average error percentage is 7.98%, and for the vertical tool distance is 3 meters from the lamp the difference in error value is an average of 0.92 lx and an average error percentage of 5.85%.

scholarly journals Spectral Relations of Hydro-Optical Characteristics in Coastal Waters of the South Coast of Crimea

2021 ◽  
Author(s):  
V. I. Mankovsky ◽  
E. V. Mankovskaya ◽  
◽  
Keyword(s):  
Attenuation Coefficient ◽  
Coastal Waters ◽  
Deep Sea ◽  
Secchi Depth ◽  
Measurement Data ◽  
South Coast ◽  
Optical Measurements ◽  
The South ◽  
Beam Attenuation ◽  
Beam Attenuation Coefficient

The article studies interrelations of the beam attenuation coefficient in different spectrum regions and spectral relations of beam attenuation coefficient to the Secchi depth in the coastal waters of the South Coast of Crimea. The data were used of in situ optical measurements obtained in 2008–2014 from a stationary oceanographic platform installed in the coastal waters of the South Coast of Crimea near the village of Katsiveli. According to the measurement data the relation was determined of the beam attenuation coefficient in eight parts of the spectrum in the wavelength range of 416–640 nm to the Secchi depth, which varies from 6 m to 17.5 m. Spectral distributions of the beam attenuation coefficient at different Secchi depths in coastal and deep sea waters were compared. As a result, it is concluded that the relationships between the spectral attenuation coefficient and the Secchi depth in coastal waters are not applicable to deep sea waters. It is shown that the feature of such equations in coastal waters is related to the higher concentration of fine suspended matter in them. Intercorrelation parameters were calculated of beam attenuation coefficients in different spectrum regions in coastal waters. High correlation coefficients make it possible to reconstruct distribution of the attenuation coefficient in a wide spectral range based on measurements at one wavelength in any spectrum region. The optimal spectral region to measure the beam attenuation coefficient is 468–527 nm.

scholarly journals Proposal of an Alternative to the AMA Guidelines for the Evaluation of the Cervical ROM

Designs ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 43
Author(s):  
María Jesus Martínez-Beltrán ◽  
Alberto Fidalgo-Herrera ◽  
José A. Moreno-Ruiz ◽  
Julio C. de la Torre-Montero
Keyword(s):  
Cervical Spine ◽  
Good Accuracy ◽  
Intraclass Correlation ◽  
Case Control ◽  
Normative Values ◽  
Measuring Device ◽  
Control Phase ◽  
Measuring Devices ◽  
Car Accident ◽  
Very High

The cervical spine is one of the most frequently injured joints in a car accident. References for the range of motion (ROM) that should be expected in a person are needed to stage the injuries. The two main objectives of this paper are to clinically validate a measuring device for the cervical spine, and to assess if the use of different ROM reference values will render different results from the American Medical Association (AMA) ROM guidelines. The present study is divided into 2 phases, a validation phase with 55 subjects and a case-control phase with 80 subjects. A BTS (Bioengineering Technology and System) system and the EBI-5 (estudio biomecánico integral) system were used for the present investigation. The intraclass correlation agreement value between both measuring devices is considered very good with a Cronbach alpha up to 0.9 in every dimension. Correlations (r) between variables are very high, not showing any values lower than 0.887. All comparisons between using AMA ROM guidelines or normative values presented significant differences (p < 0.05). The EBI-5 system has exhibited good accuracy being paired to a photogrammetric system. The use of guidelines adjusted to age constitute an alternative to the use of the AMA cervical ROM guidelines. Professionals should use age-normalized guidelines as an alternative to the AMA guidelines.

Design of a Universal Software System for Controlling Geometric Measuring Devices

2006 ◽  
Vol 7 (1) ◽  
pp. 108-111 ◽  
Author(s):  
K. Lübke ◽  
C. Pieper ◽  
G. Goch ◽  
K. Kammers
Keyword(s):  
User Interface ◽  
Coordinate Measuring Machine ◽  
Specific Form ◽  
Measuring Device ◽  
New Developments ◽  
Measuring Devices ◽  
Different Types ◽  
Broad Variety ◽  
Measuring Machine ◽  
And Control

The research project UP-Prosa, a German acronym for universal and unified platform for planning, programming, controlling and evaluating processes, of measuring, aims at realizing a platform to design and control processes of geometry measurements, which supports a broad variety of measuring devices via one user interface. Based on Windows Operating System (OS) a software was developed able to control inspection devices for different types of geometry measurements (coordinate measuring machine, form, roughness, gear) and manufacturers by one defined communication protocol. This uniform user interface contains the programming of measurement processes, evaluation algorithms with standardized methods, as well as abilities to generate record pages at the users expectations. At the level of geometric measuring devices a universal controlling software called Prosa InterCommunicator (Prosa-ICom) was designed. Prosa-ICom communicates via network with the user interface and translates the defined protocol into a measuring device specific form. The internal structure is extendable and so it seems to be appropriate for both new developments and upgrades (retrofit) for all kinds of geometric measuring devices.

Sign in / Sign up

Export Citation Format

Share Document