Mechatronic structure of modern test bench for precise angle calibration

Many optoelectronic measuring instruments, vibro-scanning devices and deflection systems have angular sensors or circular scales as a reference measure for angle determination. Most of angle measuring devices must be tested or calibrated with a relevant precision therefore a special test rig for these purposes is needed. At current technical level the precision of measurements of vibro-displacement, amplitudes or frequency of vibrations implies not only precise manufacturing and assembly but also a necessity to incorporate modern computer technologies enabling automation of the measuring process. All these components of modern technologies can be accomplished by using mechatronic constituents. This paper presents a brief review of the angle testing/calibration equipment with the integrated mechatronic device

Mechatronic structure of modern test bench for precise angle calibration

Many optoelectronic measuring instruments, vibro-scanning devices and deflection systems have angular sensors or circular scales as a reference measure for angle determination. Most of angle measuring devices must be tested or calibrated with a relevant precision therefore a special test rig for these purposes is needed. At current technical level the precision of measurements of vibro-displacement, amplitudes or frequency of vibrations implies not only precise manufacturing and assembly but also a necessity to incorporate modern computer technologies enabling automation of the measuring process. All these components of modern technologies can be accomplished by using mechatronic constituents. This paper presents a brief review of the angle testing/calibration equipment with the integrated mechatronic device

Research of positioning accuracy of robot MOTOMAN SSF2000

Research of the dynamic properties, positioning precision and repeatability of MOTOMAN SSF2000 movement is presented in this article. Dynamic properties were analyzed using a mobile equipment of measuring „Machine Diagnostic Toolbox Type 9727“ with a DELL notebook. The manipulator vibrations were measured in two robot’s positions: vertical and horizontal, and at three different speeds. The research was made under three different conditions, changing the tool mass and spee

Research of positioning accuracy of robot MOTOMAN SSF2000

Research of the dynamic properties, positioning precision and repeatability of MOTOMAN SSF2000 movement is presented in this article. Dynamic properties were analyzed using a mobile equipment of measuring „Machine Diagnostic Toolbox Type 9727“ with a DELL notebook. The manipulator vibrations were measured in two robot’s positions: vertical and horizontal, and at three different speeds. The research was made under three different conditions, changing the tool mass and spee

Research of positioning accuracy of robot MOTOMAN SSF2000

Research of the dynamic properties, positioning precision and repeatability of MOTOMAN SSF2000 movement is presented in this article. Dynamic properties were analyzed using a mobile equipment of measuring „Machine Diagnostic Toolbox Type 9727“ with a DELL notebook. The manipulator vibrations were measured in two robot’s positions: vertical and horizontal, and at three different speeds. The research was made under three different conditions, changing the tool mass and spee

Some issues of the national gravimetric network development in Lithuania

The gravity height systems adoption is crucial in development of national geodetic reference. Successful solution of this questions guarantees the reliable determination of geopotential heights, usage of modern geodetic space techniques, maintenance of the navigation, geodetic and cartographic works, solution of geodynamic tasks, support the relations between the similar systems of other countries, participation in the international projects. The gravity and height systems should be related with the geocentric geodetic coordinate system. In Lithuania such a system was adopted in 1994 as a Lithuanian Coordinate System (LKS 94). It is consist with European Terrestrial Reference System 1989 (ETRS 89). With adoption of LKS 94 the normal gravity field GRS 80 was introduced. It was recommend by the International Association of Geodesy (IAG). To introduce the new gravity system instead of Potsdam system the absolute gravity measurements were carried out in 1994. Such measurements were carried out by Jaakko Makinen (Finish Geodetic Institute). Measurements were performed by ballistic gravimeter JILAg-5 in the points VILNIUS, KLAIPEDA and PANEVEZYS. Absolute gravity measurements were repeated in 2002. The 5 µGal precision of the gravity acceleration was derived. Some issues of development of the National gravimetric network are discussed. The main stress is given to the analysis of the precision of the gravity acceleration at the points of the gravimetric network. The calibration of the gravimeters was carried out before and after field survey. The difference of the gravity acceleration of the calibration bases is 202 mGal, and two zero order and two first order points are in it. The standard deviation of the linear scale coefficients of 0.00006 was received. The maximal change of the linear scale coefficients during all time of field campaign was 0.000159 (gravimeter No 183). During the three months of period of investigations the zero drift of the gravimeters was changed from 17 till 197 µGal/day. The National gravimetric network was adjusted using software package GRAVSOFT. Total number of observations is 33777. The three absolute gravity stations were chosen as initial points. Standard deviation of the single observation equal to 5 µGal, and standard deviation of gravity acceleration of the single points equal to 3 µGal were receive

Formalization of the observations of the sea level variations using XML data schemas and scalable vector graphics format

XML (Extended Markup Language) Data Schemas as the format for information exchange in graphical SVG (Scalable Vector Graphics) format is presented in the paper. SVG file format is a language for two-dimensional graphics and is based on XML. It is suggested to apply it as the advanced version of previous data exchange format TGINEX (Tide Gauge Independent Exchange Format), which contains the plain ASCII data. SVG graphics are formatted from the observations of sea level observations by the tide gauges. As an example, the formalization of data is shown on the base of the sea level observing station KLPD, which is a part of the European Sea Level Service network. XML Data Schemas, in addition, adds header’s information about the marine measurements' site, sensors and any additional necessary information. The correct header formation and the advantages of such data exchange format are analysed. Header is important for exchange between different sites from different countries as so it would be information standartization. Visual appearance of the SVG file, the source, headers and formation of the file in script are described in this paper als

Formalization of the observations of the sea level variations using XML data schemas and scalable vector graphics format

XML (Extended Markup Language) Data Schemas as the format for information exchange in graphical SVG (Scalable Vector Graphics) format is presented in the paper. SVG file format is a language for two-dimensional graphics and is based on XML. It is suggested to apply it as the advanced version of previous data exchange format TGINEX (Tide Gauge Independent Exchange Format), which contains the plain ASCII data. SVG graphics are formatted from the observations of sea level observations by the tide gauges. As an example, the formalization of data is shown on the base of the sea level observing station KLPD, which is a part of the European Sea Level Service network. XML Data Schemas, in addition, adds header’s information about the marine measurements' site, sensors and any additional necessary information. The correct header formation and the advantages of such data exchange format are analysed. Header is important for exchange between different sites from different countries as so it would be information standartization. Visual appearance of the SVG file, the source, headers and formation of the file in script are described in this paper als