Collimation line deformation measurement method

Abstract

The invention discloses a collimation line deformation measurement method. A kth period observation deviation value delta(k) of the ith measurement point of a long distance collimation line relative to a reference line is calculated by utilizing the following formula (the formula is expressed in the specification), wherein n is the number of the measurement points of the long distance collimation line, delta<j>(k) is a kth period observation local deviation value of the jth measurement point relative to the reference line formed by the connecting line of the (j-1)th measurement point and the (j+1) measurement point, and r=2,3,..., n+1; and the deformation value of the ith measurement point is difference of the kth period observation deviation value of the ith measurement point and the first period observation deviation value of the ith measurement point. The problems that the reference line of total length acts as a collimating reference, and the target is vague, collimating accuracy is poor, a backsight point and the measurement point are far apart from each other and influence of focusing error of a telescope is high when the reference line is long can be effectively solved so that influence of atmospheric refraction on the observation result can be effectively reduced. The method is simple, high in measurement accuracy and convenient in application in actual work.

Description

technical field [0001] The invention relates to a line-of-sight measurement method for engineering safety monitoring, in particular to a line-of-sight deformation measurement method. Background technique [0002] The line of sight method has been widely used in the deformation observation of dams and other engineering buildings. It has the characteristics of simple observation principle, low investment, and easy implementation, and has derived a variety of observation methods, such as segmented view Sight line, line of sight at midpoint, etc. However, they are all based on the full-length reference line, that is, the instrument must be placed at one end point to aim at the other end point during measurement. [0003] When the reference line is too long, the two ends are far away, the target is blurred, the aiming accuracy is too poor, and the distance between the backsight point and the measuring point is too far, the influence of the telescope focusing error is greater, an...

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Problems solved by technology

[0003] When the reference line is too long, the two ends are far away, the target is blurred, the aiming accuracy is too poor, and the distance between the backsight point and the measuring point is too far, the influence of the telescope focusing error is greater, and the influence of atmospheric refraction on the horizontal line of sight is the square of the distance relationship, undoubtedly has a significant impact on the observations

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