ПРИВЕДЕННЯ ЛІНІЙ, ВИМІРЯНИХ РУЛЕТКОЮ ТА ЕЛЕКТРОННИМ ТАХЕОМЕТРОМ, ДО ОДНОГО МАСШТАБУ

Abstract

Urgency of the research.Lines measurement is an important part of geodetic works. Linear measurements performed during the construction of geodetic networks, topographic survey, еngineering and geodetic works. Therefore, еnsuring reliable results linear measurement is an urgent task.Target setting. Measurements can be performed by different devices and different methods. To ensure the principle of unity of measurements each device must undergo metrological certification. In this case a comparison procedure is used. That is a comparison of the distance measured by the geodetic device with the reference one.Actual scientific researches and issues analysis. Analysis of literary sources showed that standardizing devices for lin-ear measurements is performed on the calibration base-line. Such bases-lines have several line segments that are measured accurately and securely mounted on the locality.Uninvestigatigated parts of general matters defining.However, if no calibration base-line of comparison is possible, it is expedient to bring the measure to scale at least one of the devices.Further, it is possible to standardize only this device and updated using a scale factor to correct the line, measured by another device.This saved money on an expensive proce-dure of comparison which is performed in the centres of standardization and metrology.The research objective.The main purpose of this work is to bring linear measurements madebyTrimble 3305 DR electronic total station and Inter Tool tape measure to one scale. Due to the considerable volume of materials this article highlights the laboratory measurements and processing of results concerning the Inter Tool tape measure. Further studies using Trimble 3305 DR electronic total station will be given in the following issues of the journal.The statement of basic materials.Measurements were performed in the laboratory.The ends of the line that was measured were recordedbyspecial readout devices. Readout devices were installed in the levelling head which werefixed on the stationary metal poles.On the upper plane readout devices applied two mutually perpendicular readout strokes.The distance measured between the readout touches of left and right columns. Then readout devices werereturned through 180° and measured distance again.This provided the inclusion of the eccentricity of readout strokes.These measurements made one receiving measurement. Between the receivingsthe canvas of the tape measure was changed to a small size..The aver-age value of the distances of several receivingwas determined. The average value of amendments was introduced by bring-ing the length of tape measure from the measurement temperature +15°C to +20°C; sagging cloth tape measure; bringing to the horizon.In the first cycle 10 receiving measuring the distance between divisions tape measures 0.10 m and 4.49 m with determina-tion the final value, that is equal 4.37683 m were made. In the second cycle 12 receiving measuring the distance between divi-sions tape measures 4,40 m and 8,78 m with determination the final value, which amounted to 4.37680 m were made.The results of measurements were checked for compliance with normal law by the Kolmogorovcriterion, оn equal accuracy by F-criterion, absence of systematic errors by Abbe criterion.Evaluation of accuracy the measurement line using tape measureswas made.Conclusions.Two cycles of distance measurement with Inter Tool tape measurewere performed. Statistical verification of ranks of measurements showed the absence systematic errors, matching the normal distribution of results and equal measurements accuracy implementations in both cycles. In the mean values measured distances each cycle was introduced amendment by the difference in temperature measurement and the nominal temperature C20, exceeding measured ends of lines, cloth tape sag in the air. The final horizontal laying measured distance wasdetermined with an average quadratic error of 0.054 mm and equal 4.37682 m.