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Total station instrument and dial calibration method thereof

A calibration method and the technology of a total station, applied in the field of measurement, can solve problems such as large measurement errors, and achieve the effects of reducing errors, accurate and fast calculations

Active Publication Date: 2018-08-14
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a total station and its dial calibration method, which is used to solve the problem that the existing total station measures the horizontal dial value and the vertical dial value and the human eye aims at the measurement error.

Method used

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  • Total station instrument and dial calibration method thereof
  • Total station instrument and dial calibration method thereof
  • Total station instrument and dial calibration method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A dial calibration method of a total station, comprising the following steps:

[0047] The relationship model is determined, and the relationship model is obtained through the following steps: use a display device to simulate stars, that is, use a star simulation program to simulate a star image on a liquid crystal screen and display random stars under indoor dark conditions. The telephoto camera of the automatic total station is used to take pictures of the simulated stars displayed, and obtain the images of each simulated star, and the total station measures the horizontal dial value and vertical dial value of each simulated star.

[0048] Use the one-dimensional maximum entropy segmentation algorithm or the star centroid extraction algorithm based on the kittler algorithm to calculate the coordinates of the centroid pixel and the pixel coordinate of the image center image, and determine the difference between the barycenter pixel abscissa and the image center pixel ab...

Embodiment 2

[0052] An important step in the realization of automatic astronomical measurement is that the key to realizing the conversion of the dial value is to realize the conversion of the pixel difference value and the dial difference value, such as figure 1 As shown, by using the conversion of crosshair center pixel coordinates (X, Y) → star target pixel coordinates (X′, Y′), the crosshair dial value (A, B) → star target dial reading (A′, B') conversion, although the center of mass of the target can be obtained through star image processing, there is currently no model and method to achieve the conversion between pixel coordinates and dial coordinates.

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Abstract

The invention relates to a total station instrument and a dial calibration method thereof. The method comprises the following steps: acquiring an image of a simulated star, calculating a first difference between the centroid pixel abscissa and the center pixel abscissa in the image by using a star point extraction algorithm and a second difference between the centroid pixel vertical coordinate andthe center pixel vertical coordinates of the image, fitting a first relationship model of a horizontal dial value and the first difference and a second relationship model of a vertical dial value andthe second difference, and respectively substituting the first difference and the second difference of a star to be detected into the first relationship model and the second relationship model to obtain the horizontal dial value and the vertical dial value of the star to be tested. The total station instrument and the dial calibration method thereof realizes the conversion between pixel coordinates and the dial coordinates of a measured robot, get rid of the limitation of previous obtaining of the dial values human eye aiming observation, and provide a model and data basis for realizing fastand accurate automatic astronomical measurement.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a total station and a dial calibration method thereof. Background technique [0002] The total station (total station electronic speed distance meter) is a modern optical and electronic measuring instrument integrating theodolite, electronic rangefinder and external computer software system. Because the total station can complete the horizontal angle, vertical All the measurement work of angle, distance and height difference measurement, just as it got its name. The Chinese patent with the notification number CN203116739U introduces the principle of measuring coordinates by the total station: the angle difference and distance between the observation point and the observation target can be directly measured by the total station, and the observation can be calculated by the conversion relationship of trigonometry. The coordinates of the target or the location of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C15/00G01C25/00
CPCG01C15/00G01C25/00
Inventor 张超时春霖郑勇李崇辉詹银虎王若璞米科峰叶凯陈长远
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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