scholarly journals Developing a Stand for Evaluating Technical Condition of Volumetric Hydraulic Drives with a Hydraulic Loading Device

2019 ◽  
Vol 29 (4) ◽  
pp. 529-545
Author(s):  
Pavel A. Ionov ◽  
Petr V. Senin ◽  
Sergey V. Pyanzov ◽  
Aleksey V. Stolyarov ◽  
Alexander M. Zemskov
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Technical Condition ◽  
Drive Shaft ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Hydraulic Loading ◽  
Data Acquisition Board ◽  
Loading Device ◽  
Made In

Introduction. The article deals with the development of a device for evaluating technical condition on of volumetric hydraulic drives made in Russia and abroad at repair and service centres. Materials and Methods. The study uses the statements of theoretical mechanics and hydrodynamics, the basic principles of mechanisms and machines production. For technical condition evaluating of volumetric hydraulic drives, the method of hydraulic loading of hydraulic motor was applied. Reliability of results was confirmed during experimental settings of the hydraulic loading device stand. Results. A stand design with the hydraulic loading device was developed and put into practice for new technical condition evaluating of volumetric hydraulic drives, made in Russia and abroad, at repair and service centres. A property of the stand is the use of the hydraulic loading method when the torque (braking) moment on the shaft of the tested hydraulic rotor is created using a hydraulic machine. The stand consists of data processing and measurement units. The data processing unit is based on a multifunctional data acquisition board connected with a personal computer. The structure of the data measurement unit includes a frequency converter connected to an electric motor, a drive shaft for connecting the shaft of the tested hydraulic pump; hydraulic system having a hydraulic tank; suction, control, drain, and discharge lines and reversible flow chokes installed in discharge lines and connected with the hydraulic pump and hydraulic rotor; loading device with the reversible hydraulic pump, drive shaft joined with the shaft of the tested hydraulic motor. Additionally, reversible throttle flow meters are connected via special ports and electric lines to the data acquisition board. The developed stand allows evaluating the technical condition of most widespread models of volumetric hydraulic drives used in modern agricultural and road construction equipment. The stand is characterized by good energy efficiency, simplicity of design, low costs, good technical characteristics that make it competitive. Discussion and Conclusion. The new stand design with the hydraulic loading device allows implementating of the dynamic testing methodology and guarantees high accuracy of evaluating the technical condition of the most widespread Russian and foreign volumetric hydraulic drives at repair and service centres. Further improvement of the evaluating the technical condition of volumetric hydraulic drives is related to the development of specialized software for processing and analysing test results in real-time.

Developments in exploration geophysics, 1975–1980

Geophysics ◽  
1981 ◽  
Vol 46 (8) ◽  
pp. 1088-1099 ◽  
Author(s):  
Robert B. Rice ◽  
Samuel J. Allen ◽  
O. James Gant ◽  
Robert N. Hodgson ◽  
Don E. Larson ◽  
...  
Keyword(s):  
Wave Equation ◽  
Data Processing ◽  
Data Acquisition ◽  
Seismic Data ◽  
Gravity Data ◽  
Velocity Estimation ◽  
Commercial Application ◽  
Airborne Gravity ◽  
Considerable Effort ◽  
Made In

Advances in exploration geophysics have continued apace during the last six years. We have entered a new era of exploration maturity which will be characterized by the extension of our technologies to their ultimate limits of precision. In gravity and magnetics, new inertial navigation systems permit the very rapid helicopter‐supported land acquisition of precise surface gravity data which is cost‐effective in regions of severe topography. Considerable effort is being expended to obtain airborne gravity data via helicopter which is of exploration quality. Significant progress has also been made in processing and interpreting potential field data. The goal of deriving the maximum amount of accurate subsurface information from seismic data has led to much more densely sampled and precise 2- and 3-D land data acquisition techniques. Land surveying accuracy has been greatly improved. The number of individually recorded detector channels has been increased dramatically (up to 1024) in order to approximate much more accurately a point‐source, point‐detector system. Much more powerful compressional‐wave vibrators can now maintain full force while sweeping up or down from 5 Hz to over 200 Hz. In marine surveying, new streamer cables and shipboard instrumentation permit the recording and limited processing of 96 to 480 channels. Improvements have also been made in marine sources and arrays. The most important developments in seismic data processing—wave‐equation based imaging and inversion methods—may be the forerunners of a totally new processing methodology. Wave‐equation methods have been formulated for migration before and after stack, multiples suppression, datum and replacement statics, velocity estimation, and seismic inversion. Inversion techniques which provide detailed acoustic‐impedance or velocity estimates have found widespread commercial application. Wavelet processing has greatly expanded our stratigraphic analysis capabilities. Much more sophisticated 1-, 2-, and 3-D modeling techniques are being used effectively to guide data acquisition and processing, as direct interpretation aids, and to teach basic interpretation concepts. Some systems can now handle vertical and lateral velocity changes, inelastic attenuation, curved reflection horizons, transitional boundaries, time‐variant waveforms, ghosting, multiples, and array‐response effects. Improved seismic display formats and the extensive use of color have been valuable in data processing, modeling, and interpretation. Stratigraphic interpretation has evolved into three major categories: (1) macrostratigraphy, where regional and basinal depositional patterns are analyzed to describe the broad geologic depositional environment; (2) qualitative stratigraphy, where specific rock units and their properties are analyzed qualitatively to delineate lithology, porosity, structural setting, and areal extent and shape; and (3) quantitative stratigraphy, where anomalies are mapped at a specific facies level to define net porosity‐feet distribution, gas‐fluid contacts, and probable pore fill. In essence, what began as direct hydrocarbon‐indicator technology applicable primarily to Upper Tertiary clastics has now matured to utility in virtually every geologic province. Considerable effort has been expended on the direct generation and recording of shear waves in an attempt to obtain more information about stratigraphy, porosity, and oil and gas saturation. Seismic service companies now offer shear‐wave prospecting using vibrator, horizontal‐impact, or explosive sources. Well logging has seen the acceleration of computerization. Wellsite tape recorders and minicomputers with relatively simple interpretation algorithms are routinely available. More sophisticated computerized interpretation methods are offered as a service at data processing centers.

MODELING THE TORQUE OF THE HYDRAULIC VOLUME DRIVE WITH THE PARAMETERS OF THE HYDRAULIC LOADING DEVICE

2021 ◽  
Vol 1 (142) ◽  
pp. 72-82
Author(s):  
Sergey Pyanzov ◽  
◽  
Pavel Ionov ◽  
Aleksandr Zemskov ◽  
Aleksey Stolyarov
Keyword(s):  
Mathematical Model ◽  
Hydraulic Drive ◽  
Test Method ◽  
Research Purpose ◽  
Hydraulic Motor ◽  
Hydraulic Loading ◽  
Active Experiment ◽  
Loading Device ◽  
Optimization Parameter ◽  
The Relationship

Currently, manufacturers for a reliable assessment of the technical condition of volumetric hydraulic drives use the dynamic test method, which allows you to determine the torque (braking) moment on the shaft of the tested hydraulic motor. There are diffi culties in reliably determining the value of the developed torque (braking) moment. (Research purpose) The research purpose is in constructing a mathematical model of the relationship between the developed torque (braking) moment of a volumetric hydraulic drive and the parameters of a hydraulic loading device. (Materials and methods) The article presents a hydraulic loading device that provides the necessary braking torque on the shaft of the tested hydraulic motor. Authors conducted one-factor and multifactor experiments-dynamic tests of the new Sauer-Danfoss series 90 volumetric hydraulic drive using a hydraulic loading device. The torque (braking) was monitored using a non-contact digital torque sensor M 425 3-A datum electronics and a digital indicator with LCD display (Results and discussion) As a result of one-factor passive experiments, the factors infl uencing the optimization parameter and the ranges of their variation were determined. A mathematical model of the relationship between the developed torque (braking) moment of a volumetric hydraulic drive and the parameters of a hydraulic loading device was obtained by a multi-factor active experiment. The article presents a complete planning matrix for a multi-factor active experiment, which refl ects the sequence of all possible combinations of factors that affect the optimization parameter. The most signifi cant factors affecting the value of the developed torque (braking) moment were: the pressure drop and the temperature of the working fluid in the hydraulic lines of the hydraulic loading device. (Conclusions) The mathematical model allows us to determine with high accuracy the developed torque (braking) of the volumetric hydraulic drive.

Data Processing for Ship Screw Propellers Measurements

2019 ◽  
Vol 957 ◽  
pp. 239-246
Author(s):  
Tom Savu
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Rotary Encoder ◽  
Data Acquisition Board ◽  
The Mean

A data acquisition system was developed for measuring standardised ship propeller’s parameters. The hardware consists of two linear and one rotary encoder, all sending the data to a counter/timer data acquisition board. The software is first aligning the different coordinates systems of the propeller and of the three encoders . Data processing is initially performed for compensating the effects of different encoders’ resolutions. There are then computed the blade profile’s length and the coordinates of the points belonging to the blades’ reference lines, together with the local pitch variations on each radius and blade, the mean pitch per blade and the mean pitch of the propeller. A discussion is made about choosing the most appropriate number of points where the local pitch is computed, thus providing useful data for estimating the best way for propeller’s overhauling.

MODELING THE TORQUE OF THE HYDRAULIC VOLUME DRIVE WITH THE PARAMETERS OF THE HYDRAULIC LOADING DEVICE

2021 ◽  
Vol 1 (142) ◽  
pp. 72-82
Author(s):  
Sergey V. Pyanzov ◽  
◽  
Pavel A. Ionov ◽  
Aleksandr M. Zemskov ◽  
Aleksey V. Stolyarov
Keyword(s):  
Mathematical Model ◽  
Hydraulic Drive ◽  
Test Method ◽  
Research Purpose ◽  
Hydraulic Motor ◽  
Hydraulic Loading ◽  
Active Experiment ◽  
Loading Device ◽  
Optimization Parameter ◽  
The Relationship

Currently, manufacturers for a reliable assessment of the technical condition of volumetric hydraulic drives use the dynamic test method, which allows you to determine the torque (braking) moment on the shaft of the tested hydraulic motor. There are difficulties in reliably determining the value of the developed torque (braking) moment. (Research purpose) The research purpose is in constructing a mathematical model of the relationship between the developed torque (braking) moment of a volumetric hydraulic drive and the parameters of a hydraulic loading device. (Materials and methods) The article presents a hydraulic loading device that provides the necessary braking torque on the shaft of the tested hydraulic motor. Authors conducted one-factor and multi- factor experiments-dynamic tests of the new Sauer-Danfoss series 90 volumetric hydraulic drive using a hydraulic loading device. The torque (braking) was monitored using a non-contact digital torque sensor M 425 3-A datum electronics and a digital indicator with LCD display (Results and discussion) As a result of one-factor passive experiments, the factors influencing the optimization parameter and the ranges of their variation were determined. A mathematical model of the relationship between the developed torque (braking) moment of a volumetric hydraulic drive and the parameters of a hydraulic loading device was obtained by a multi-factor active experiment. The article presents a complete planning matrix for a multi-factor active experiment, which reflects the sequence of all possible combinations of factors that affect the optimization parameter. The most significant factors affecting the value of the developed torque (braking) moment were: the pressure drop and the temperature of the working fluid in the hydraulic lines of the hydraulic loading device. (Conclusions) The mathematical model allows us to determine with high accuracy the developed torque (braking) of the volumetric hydraulic drive.

Application of ultra-high molecular weight polyethylene in a hydraulic drive

2020 ◽  
pp. 77-78
Keyword(s):  
Molecular Weight ◽  
Low Temperature ◽  
High Molecular Weight ◽  
Hydraulic Drive ◽  
Control Valve ◽  
Hydraulic Control ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Hydraulic Oil ◽  
Ultra High Molecular Weight

The use of ultra-high molecular weight polyethylene (UHMW PE) for the manufacture of various parts, in particular cuffs for hydraulic drives, is proposed. The properties and advantages of UHMW PE in comparison with other polyethylene materials are considered. Keywords ultra-high molecular weight polyethylene, hydraulic pump, hydraulic motor, hydraulic control valve, hydraulic oil, low temperature. [email protected]

Design and Implement of Data Acquisition System Based on Reconfigurable Computing

2012 ◽  
Vol 546-547 ◽  
pp. 1393-1397
Author(s):  
Zhi Wen Xiong ◽  
Chen Guang Xu ◽  
Hong Zeng
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Reconfigurable Computing ◽  
Rapid Development ◽  
Physical Property ◽  
Data Acquisition System ◽  
Digital System ◽  
Working Environment ◽  
Acquisition System ◽  
Computing Technology

Data acquisition begins with the physical phenomenon or physical property to be measured. Examples of this include temperature, gas pressure, and light intensity, and force, fluid flow, regardless of the type of physical property to be measured. Physical property converted into digital, and then by the computer for storage, processing, display or printing process, the corresponding system is called data acquisition system. With the rapid development of computer technology, data acquisition systems quickly gained popularity. A variety of products based on digital technology have been created. Digital System spread quickly; it’s mainly the following two advantages: the first is the digital processing flexible and convenient; the second is a digital system is very reliable. The main idea of Reconfigurable computing technology [1] is using the FPGA [2][3] allows the system has a dynamically configurable capacity, suitable for harsh environment applications, improve the speed of data processing. By the use of dynamic reconfigurable FPGA devices can be realized on the hardware logic function modification, application of reconfigurable computing technology can improve the speed of data processing. Data acquisition system is widely applied in many fields, and often used the abominable working environment place. The reconfigurable computing technology, can greatly improve the data acquisition system reliability and safety. The paper introduces a kind of multi-channel data acquisition system based on USB bus and FPGA, the factors affecting the performance of system are discussed, and describes how to use reconfigurable computing technology to improve the efficiency of data acquisition system while reduce energy consumption. The system in this paper uses AD's AD9220, ALTERA's EP1C6-8 and IDT's IDT70V24, Cypress’s CY7C68013.

Calculation of a closed hydraulic volumetric system

2021 ◽  
pp. 27-30
Author(s):  
Keyword(s):  
Power Plant ◽  
Wind Power ◽  
Hydraulic System ◽  
Working Fluid ◽  
Wind Power Plant ◽  
Hydraulic Systems ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Oil Pump ◽  
Selection Of

An algorithm is proposed for calculating a closed volumetric hydraulic pump-hydraulic motor system using the example of the hydraulic system of a wind power plant, based on the calculation of the hydraulic systems of mobile machines. The main characteristics of the system components, the selection of initial data for the calculation, working fluid and diameters of hydraulic lines are analyzed. Keywords: hydraulic system, energy, fluid, oil, pump, motor, renewable energy source, wind power plant, machine. [email protected]

scholarly journals Application of a Hydraulic Actuator With Solenoid Valves for a Speed Control System

2020 ◽  
Vol 8 (4) ◽  
Author(s):  
Abdullah Al-Buzayd ◽  
Nadhim Faleh ◽  
Munaf Badr
Keyword(s):  
Control System ◽  
Rotational Velocity ◽  
Speed Control ◽  
Hydraulic Actuator ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
System Components ◽  
Speed Control System ◽  
The Right

This paper describes the design and the execution of a speed control system for a rotary hydraulic actuator by using solenoid valves. The design is to control the rotational velocity (or the speed) of a hydraulic motor without using neither a variable hydraulic pump nor a variable hydraulic motor.  With analysis by the simulation using the package, V 4.2p/1.67 of FluidSIM 4 from FESTO. It is possible to predict the output of the rotational velocity (rpm) and next could take the right decision about the correct specifications of the system components to meet the requirements.

scholarly journals RECONSTRUCTION OF INDOOR MODELS USING POINT CLOUDS GENERATED FROM SINGLE-LENS REFLEX CAMERAS AND DEPTH IMAGES

2015 ◽  
Vol XL-4/W5 ◽  
pp. 99-102
Author(s):  
F. Tsai ◽  
T.-S. Wu ◽  
I.-C. Lee ◽  
H. Chang ◽  
A. Y. S. Su
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Three Dimensional ◽  
Point Clouds ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Indoor Environments ◽  
Single Lens ◽  
Processing Procedure ◽  
Data Processing Procedure

This paper presents a data acquisition system consisting of multiple RGB-D sensors and digital single-lens reflex (DSLR) cameras. A systematic data processing procedure for integrating these two kinds of devices to generate three-dimensional point clouds of indoor environments is also developed and described. In the developed system, DSLR cameras are used to bridge the Kinects and provide a more accurate ray intersection condition, which takes advantage of the higher resolution and image quality of the DSLR cameras. Structure from Motion (SFM) reconstruction is used to link and merge multiple Kinect point clouds and dense point clouds (from DSLR color images) to generate initial integrated point clouds. Then, bundle adjustment is used to resolve the exterior orientation (EO) of all images. Those exterior orientations are used as the initial values to combine these point clouds at each frame into the same coordinate system using Helmert (seven-parameter) transformation. Experimental results demonstrate that the design of the data acquisition system and the data processing procedure can generate dense and fully colored point clouds of indoor environments successfully even in featureless areas. The accuracy of the generated point clouds were evaluated by comparing the widths and heights of identified objects as well as coordinates of pre-set independent check points against in situ measurements. Based on the generated point clouds, complete and accurate three-dimensional models of indoor environments can be constructed effectively.

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