Development Of Measurement System Research Articles

Experience in the use of microcontroller platforms and computer technologies in experimental researches of automotive and tractor machinery

BACKGROUND: The current level of research and development work involves the use of systems based on programmable electronics. At the current level of engineering, the development of these systems is expedient to carry out using specialized software. At the same time, a systemic approach to the methodology for using the mentioned tools has not been fully formed yet, which necessitates the consideration of the relevant issues of theory and practice.
 AIMS: The attempt to form the principles of the mentioned systemic approach, based on the idea of the integrated hardware and software use, where the complementarity of their capabilities ensures the appearance of a pronounced emergence.
 METHODS: The article contains an analytical review and categorization of modern tools that allow to support research in their preparation, carrying out and results processing. As a particular example of their successful combined application, a computerized educational laboratory installation designed by the authors for balancing and calibrating the torque measurement system at a driveshaft of a passenger car is considered.
 RESULTS: The article materials contain a description of design and an operation principle of the mentioned installation, a consistent consideration of those specific tools that were used in its development, а information regarding the basic capabilities, the most significant characteristics and features of these tools, as well as the trial tests results and their interpretation.
 CONCLUSIONS: The approach described by the authors makes it possible to rationally approach the solution of problems related to the development and use of data measurement systems for experimental studies of automotive and tractor machinery.

Metal film thickness measurement using phase linearity feature for immunity to lift-off effect

In eddy current (EC) thickness measurements, the presence of the lift-off effect will significantly impact the measurement signal, leading to inaccuracies. It has been reported that the phase signal demonstrates a certain level of immunity to the lift-off effect compared to the amplitude signal, as its variation in response to lift-off is relatively less prominent. However, it should be noted that the phase is not entirely unaffected by the lift-off effect. In this paper, a linear relationship between the tangent of the phase angle and the lift-off has been found, termed the phase linear feature. Firstly, the phase linear feature was validated through theoretical derivations and experimental investigations. Subsequently, a new method of thickness measurement based on the fixed lift-off deviation was proposed by using this feature, and a corresponding double-coil sensor was also designed. Finally, to validate the proposed method, measurements of aluminum and copper films were carried out using the developed measurement system under different lift-off distances. The experimental results demonstrate that the measurement relative error of the proposed method remains within 5% in the 0–3 mm lift-off range. This indicates that the proposed method can provide accurate thickness measurements and is independent of the lift effect. Furthermore, the proposed method also has the advantages of single-frequency excitation, simplicity of the sensor, and straightforward relationship between features and thickness. Therefore, this study presents an effective solution for practical online thickness measurement.

Radiophotonic methods and means for the resolution increase of a continuous-wave radar with an FBG discriminator

During the development of a radiophotonic systems for instantaneous microwave frequencies measurement, ever higher requirements are placed on their range, accuracy, and resolution, which can only be satisfied by the creation of a new devices and operating principles. Three types of analysis of frequency components after modulation are possible: analysis of each component separately (differential analysis), analysis of the envelope of each two-frequency pair (integral-derivative analysis), and analysis of all components (integral analysis). All these methods are realizable and correspond to one-, two-, and polyharmonic FBG probing using a limited number of optical band-pass filters. Based on the results of a comparative analysis, it was shown that the problem of the resolution increase of the instantaneous frequency measurement of microwave signals in symmetrical circuits on selective elements can be solved by transferring the frequency components of the measured signal to the middle of the linear section of the FBG; using radiophotonic multiplication and using polyharmonic transformation of the measured frequency on TAPM. Among the advantages of such solutions, the possibility of the resolution increase of the frequency measurement of microwave signals lies in low frequencies measurement in the linear section of the FBG when transferring the frequency components of the measured signal, a multiple decrease in the measurement error by a factor equal to the number of multiplication stages for radiophotonic multiplication and a multiple of the number of harmonics used for the method of polyharmonic transformation.

Development of a Real-Time Continuous Measurement System for Tree Radial Direction

Development of a Real-Time Continuous Measurement System for Tree Radial Direction

Development and application of creepage distance measurement system for zinc oxide arrester

Arrester is used to protect various electrical equipment in the power system from lightning overvoltage, working overvoltage, power frequency transient overvoltage impact and damage. Zinc oxide arrester is widely used in power system. Creepage distance is a necessary item of arrester performance test. It is a necessary project for lightning arrester factory testing and centralized network access testing. At present, the measurement of arrester creepage distance mainly adopts the artificial method of paper tape measurement or wire measurement. In this paper, a measurement system for arrester creepage distance is developed by using three-dimensional reconstruction and laser vision detection, which realizes one-click and fully automatic detection of creepage distance. The field application results show that the system not only solves the problems of heavy workload and low measurement accuracy of manual measurement methods, but also displays the measurement results in real time, which significantly improves the reliability and flexibility of measurement work, shortens the measurement time and improves the work efficiency.

Development of an Autonomous Measurement System for Estimation of Snow Profile on Road Surfaces

This paper presents the development of a novel prototype system to measure the profile of snow and detect ice on road surfaces. While researchers have previously developed methods to estimate the tire-road friction coefficient, methods to create a high resolution map of snow cover and ice on roads have not been developed. The prototype and data processing methods presented in this study provide a potential solution that would greatly benefit winter road maintenance teams. Having a device capable of creating a detailed map of snow and ice cover on roads would allow for more efficient plowing and salt deployment, better informing of the public about current road conditions, as well as better analysis of current plowing techniques to improve winter road maintenance operations. The measurement of the snow profile is based on the use of two types of inexpensive ranging sensors mounted on a rotationally controlled stepper motor platform. The technical challenges addressed in the development include analysis of the scan path over which the system scans the road, differentiation between asphalt, concrete, and snow surfaces using reflection amplitudes, accurate transformation of raw distance measurements to inertial coordinates, and identification of the Euler angles of the sensors using parameters associated with the scanned surface profile. Extensive experimental results and test data are presented, which show that the system is capable of measuring the snow profile on a road with an accuracy of ±1 cm when a reasonable portion of bare road is visible, and ±2 cm when only small portions of bare road are visible.

Development of continuous measurement system for hydrogen and impurity gases using detector tube.

A relatively accurate, inexpensive, simple, and continuous quantification system for hydrogen and impurity gas(es) using a detector tube was developed in this study. Additionally, different detector tubes can be applied to measure different types of gases in a wide range from ppm order to % level. We optimized this system and evaluated its accuracy as well as the behavior of released H2 and impurity (NH3) gases from a hydrolysis of ammonia borane using a Pt/Al2O3 catalyst. The accuracy of hydrogen quantitation achieved by this system was comparable to that of commercial mass flow meters, and the accuracy of ammonia quantitation was 10% or 5% relative standard deviation, which depends on the detector tube. The concentration of released NH3 was evaluated by image analysis with a time-lapse video of the detector tube and succeeded in analyzing from ppm to % order. The H2 and NH3 release behaviors agreed with pH, and the percentage of reaction was estimated by NMR measurement of the reacted solution. These results confirmed the accuracy of this system.

Himmelsbeobachtungen und deren Messung, von der Regierungszeit des Gudea von Lagash bis zum Almagest des Claudius Ptolemäus

The present article gives an overview on the development of the measurement and practical acquisition of circle section dimensions since the late 3rd millennium BC. In key points, the prerequisites and practical implementation for celestial observations over approx. 1500 years up to the 8th century BC are collected and analyzed, in terms of their logical requirements and connected archaeological findings. A comprehensible and unambiguous calculation is made for the celestial dimensions in cubits used from the 8th to the 2nd century BC, for which estimated values between 2.5 and 2.1 angular degrees have been determined since Kugler 1900 until to recently researchers. Therefore, for the first time, the exact transformation value is presented here. Not only the connections and the further development of this celestial measurement system are presented, but also its coherent adaptation up to the first definition and use of the angular unit measurement, which is still used today, around 200 BC. In addition, some data and their previous interpretation from various sources are put up for discussion, which even include the table of Chords, presented by Ptolemy in his Almagest and their use.

Environmental Monitoring in Bus Transportation Using a Developed Measurement System

Air pollution and travel comfort in public transport is a significant problem as it can cause health problems for passengers. There are no sufficiently developed and researched monitoring systems for measuring the quality of the environment in public transport, which makes it difficult to assess the extent of the problem and implement effective solutions. This study presents the results of measurements made with a developed system for assessing air pollution and environmental quality in urban transport. Two time periods were defined based on air pollution and traffic levels, and informational features were selected for bus stops and buses. Noise was found not to be an informative feature, but vehicle acceleration should be considered in environmental quality monitoring. A quadratic discriminant classifier combined with principal components was shown to accurately classify high and low pollution time periods. Further research is planned to investigate the relationship between air pollution and travel discomfort and to develop effective strategies to improve air quality in urban public transport.

Development of a real-time mobile gamma-ray measurement system for shipboard use

Large areas must be rapidly screened to monitor radiation in marine environments. For this purpose, this study developed a mobile real-time gamma-ray measurement system for shipboard use and evaluated its performance. The system was developed to measure engine or generator cooling water by installing a canister inside the ship. The minimum detectable activity of the system is about 0.8 Bq/L for a 60 s measurement period, and real-time data transmission and remote control are possible. The system was tested in the field and is currently being installed and operated on ships in service. Such a ship-based real-time gamma-radiation measurement system is suitable for a wide range of marine radiation surveillance applications and is expected to be rapidly deployed.

Development of smart cardiovascular measurement system using feature selection and machine learning models for prediction of sleep deprivation, cold hands and feet, and Shanghuo syndrome

This study aimed to develop a smart cardiovascular measurement system using ECG and PPG to evaluate health issues: sleep deprivation, cold hands and feet, and the Shanghuo syndrome. The proposed methods extracted features from physical Signal and utilized diverse machine learning techniques for the evaluation. The results demonstrated prediction accuracies exceeding 82% (87% for sleep deprivation using k-nearest neighbor, 83% for cold hands and feet using a kernel classifier, and 82% for the Shanghuo syndrome using ensemble learning). Moreover, this study identified novel features associated with sleep deprivation, cold hands and feet, and the Shanghuo syndrome in the context of traditional Chinese medicine (TCM). An accurate prediction of TCM-defined cold hands and feet and Shanghuo syndrome, while considering relevant physiological features, is critical in the field of machine learning research. The developed system can be seamlessly integrated with the existing instruments to facilitate self-health management and collaboration with medical treatment.

Development of a semi-open chamber system for the gas exchange measurement of whole-canopy under steady and unsteady states in cucumber seedlings

BackgroundLarge-scale data on the photosynthetic characteristics of whole crop canopy is crucial for improving yield. However, current data collection methods remain challenging, and the time constraints associated with photosynthetic data collection further complicate matters. Developing a practical yet easy-to-use tool for collecting whole-canopy data is essential to address these challenges. Furthermore, it is necessary to obtain instantaneous measurements of photosynthetic rate over a wide range of CO2 concentrations under an unsteady state to enable faster data collection and obtain reliable biochemical limits of carbon assimilation. This study developed a semi-open chamber system with steady and unsteady state measurement techniques to collect biochemical photosynthetic data from an entire cucumber canopy, emphasizing the correction procedures for CO2 concentration of unsteady state measurements applicable regardless of chamber scale.ResultsAfter constructing a semi-open chamber system, we described how to correct measurement errors according to chamber volume. In order to assess the accuracy of the newly developed system, an analysis was conducted to determine the overall measurement error resulting from variations in the reference, sample CO2 concentration, and leakage flow rate. The total measurement error was accurate to no more than 10%. Furthermore, the difference between the photosynthetic rate of the single leaf and that of the whole-canopy was not significant in Rubisco activity-limited carboxylation range. In addition, the Farquhar–von Caemmerer–Berry (FvCB) model parameters and the photosynthetic rate estimation values were compared to evaluate the steady- and unsteady state measurement methods between the cucumber seedlings' single-leaf and whole-canopy. The average root mean square error of the FvCB model in the steady (standard A-Ci response) and unsteady states (800 to 400 ramp) of the chambers was 1.4 and 2.3, respectively. Results show that the developed system is suitable for measuring the gas exchange rate of the cucumber canopy.ConclusionsWe demonstrate the correction method for measurement errors to enable the gas exchange rate of the whole-canopy even in an unsteady state. The correction method of the measurement system of the gas exchange rate for the whole- canopy can be applied regardless of the volume of the chamber, and it can be applied simply to other chamber systems. In addition, an unsteady state measurement method for fast data collection was also applicable. However, it was deemed necessary to identify a more optimal measurement range by conducting measurements across a broader range of values.

Design and Development of Fiber Optic Sensor System for Rotational Speed Measurement

Design and Development of Fiber Optic Sensor System for Rotational Speed Measurement

All-for-One Tourism Demonstration Zones and High-Quality Development of Tourism: Evidence from the Quasi-Natural Experiment in China

The all-for-one tourism guides the development of the tourism industry in China and promotes coordinated development of the economy and society. Existing studies emphasize the significance of all-for-one tourism but pay limited attention to the impact and mechanism of all-for-one tourism on the high-quality development of tourism. By employing the all-for-one tourism demonstration zones as a quasi-natural experiment, this research uses the time-varying difference-in-differences (DID) model to empirically investigate the relationship between all-for-one tourism demonstration zones and the high-quality development of tourism. In particular, under the guidance of the new development philosophy, this research constructs a measurement and evaluation indicator system for the high-quality development of tourism from five dimensions, including innovative, coordinated, green, open, and shared development. The results show that the all-for-one tourism demonstration zones positively impact the high-quality development of tourism, and the result is robust to a series of robustness checks, including the placebo test and the propensity score matching (PSM) procedures. Network infrastructure construction and tourism talent agglomeration are mechanisms channelling through all-for-one tourism demonstration zones and high-quality tourism development. Heterogeneity analysis reveals positive impacts of all-for-one tourism demonstration zones on central and western regions and provinces with a low proportion of tertiary sector.

Development and evaluation of a slurry density measurement system based on Applied Current-Magnetic Induction Tomography (AC-MIT)

Slurries are an important part of many industrial processes such as food processing, mineral and dredging industries. In this study, an Applied Current Magnetic Induction Tomography (AC-MIT) system was developed for measuring solid mass concentration of slurry in pipeline. The proposed AC-MIT system has two annular electrodes as transmitter sensors and 16 coils as receiver sensors. Performance of developed AC-MIT system was evaluated at five levels of salinity (7.5, 10, 12.5, 15 and 17.5 gr/lit of NaCl) and five levels of temperature (19, 24, 29, 34 and 39 °C). Some evaluation parameters such as; standard deviation (SD) and root mean square error (RMSE) were used to assess the system performance. Analysis of variance (ANOVA) is conducted to investigate the effect of temperature and salinity on the system performance. Multivariate regression method was assessed in order to predict the performance of AC-MIT system at different levels of temperature and salinity of the carrier phase as well as different solid mass concentrations. The ANOVA results showed that change in the temperature and salinity levels of the carrier phase did not have a significant effect on system performance (p > 0.05). Also there is a good correlation (R2 in the range of 0.98–0.99) for the measured solid mass concentration in both manual sampling method and AC-MIT system. This result is confirmed by the multivariate regression assessments as well as.

Development of a New Measurement System for Piston Ring Friction Based on the Floating Liner Method

Development of a New Measurement System for Piston Ring Friction Based on the Floating Liner Method

Development of a low-cost non-destructive test system for measurement of elastic modulus

Conventional measurement processes to determine elastic modulus of samples such as tensile or flexural test and bending test are typically unidirectional and destructive in nature for the measured samples. The industrial grade and commercially available Non-Destructive Test (NDT) measurement instrument based on the impulse excitation technique is meanwhile expensive. This project involves designing and developing a low-cost NDT system for the measurement of elastic modulus based on the impulse excitation technique. Secondly, it is to compare the performance of the measurement system with the tensile test. The performance of the NDT prototype will be put to test by using different type of specimens such as aluminium alloy, copper, brass, and carbon steel. Each type of specimen will carry be tested three times to get the average of the data. After all the data collection of the NDT measurement system, the tensile test will be carried out. A comparison for the measurement of the elastic modulus will be conducted between the NDT system, tensile test, and theoretical results. The expected outcome for this project is to develop a NDT for the measurement of the elastic modulus. This project also aims to reduce the industrial waste, reduce the cost of the sample test and maintain the accuracy and the performance of the NDT system compared with the tensile test.

Development and laboratory testing of a lightning current measurement system for wind turbines

Dimensioning, testing and maintenance of the lightning protection system of wind turbines can be improved using the local distributions of lightning current parameters instead of those on which lightning protection standards rely. This paper presents a prototype system for measuring lightning currents’ waveforms on wind turbines. The prototype is being developed at the Faculty of Electrical Engineering and Computing, University of Zagreb, Croatia. The system's fundamental components are two Rogowski coils and their corresponding integrators. One coil is optimized for lower frequencies and amplitudes, while the other is for higher ones. The cRIO real-time controller is used as an acquisition system, with acquisition logic developed using LabVIEW. The controller has one digitizer for each coil and a GPS synchronization module. The system was tested in the High Voltage Laboratory at University. It was recently installed on an actual wind turbine in Croatia, located in an area characterized by high winter lightning activity. Simultaneously with the prototype measurement system, the lightning activity in the wind turbine micro-location will be monitored by three other systems: the lightning location system, additional lightning monitoring sensors installed in the blades of the same wind turbine and a high-speed camera installed at the wind turbine location.

Scientific Knowledge Base in the Lens of Innovation Policy

The article examines the problem of measuring the scientific knowledge base (SKB) of innovation systems, the solution of which ensures transition to policy reformatting through the prism of SKB, which in its turn makes it possible to form a bridge between SKB and competitive opportunities in the sectoral market, between scientific knowledge and provision of technological and economic security. The developed measurement system was used to evaluate the SKB of Russia’s SIS in the field of nanotechnology in order to answer a number of questions. Has competitive nanoscience been created during the reforms? Are the country’s economic reforms suppor ted by nanotechnological knowledge? Is the scientific sector oriented towards developing breakthrough nanotechnologies of the future?

Integration of force and IMU sensors for developing low-cost portable gait measurement system in lower extremities

Gait analysis is the method to accumulate walking data. It is useful in diagnosing diseases, follow-up of symptoms, and rehabilitation post-treatment. Several techniques have been developed to assess human gait. In the laboratory, gait parameters are analyzed by using a camera capture and a force plate. However, there are several limitations, such as high operating costs, the need for a laboratory and a specialist to operate the system, and long preparation time. This paper presents the development of a low-cost portable gait measurement system by using the integration of flexible force sensors and IMU sensors in outdoor applications for early detection of abnormal gait in daily living. The developed device is designed to measure ground reaction force, acceleration, angular velocity, and joint angles of the lower extremities. The commercialized device, including the motion capture system (Motive-OptiTrack) and force platform (MatScan), is used as the reference system to validate the performance of the developed system. The results of the system show that it has high accuracy in measuring gait parameters such as ground reaction force and joint angles in lower limbs. The developed device has a strong correlation coefficient compared with the commercialized system. The percent error of the motion sensor is below 8%, and the force sensor is lower than 3%. The low-cost portable device with a user interface was successfully developed to measure gait parameters for non-laboratory applications to support healthcare applications.