Concave measuring sign assembly and mounting and measuring method

Abstract

The invention discloses a concave measuring mark assembly and a mounting and measuring method, and relates to the field of measuring signs. The concave measuring sign assembly comprises a measuring sign; the measuring sign comprises a hollow tray and a drop ball located below the tray; the tray basically takes a hemispherical shape with an opening upward, and the drop ball is basically connected to the center of the bottom of the tray by a fall line. The concave measuring mark assembly is relatively high in mounting precision and is relatively high in fixing property during use.

Description

technical field [0001] The invention relates to the field of measurement marks, in particular to a concave measurement mark assembly and an installation and measurement method. Background technique [0002] The measurement mark is a marker stone to mark the position of the ground measurement control point. The traditional measurement mark generally includes an integrally formed concave part and a raised part. When installing, the concave part is located under the buried plane (such as the ground), and the raised part is located above the buried plane. This measurement flag has the following flaws: [0003] (1) Installation defects: the center point of the measurement mark is marked on the highest point of the raised part, because when the measurement mark is installed, the highest point of the raised part is prone to tilt (like setting nails on a horizontal plane, the nail is prone to tilt), so the measurement After the sign is installed, its actual center point may be diff...

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Problems solved by technology

[0003] (1) Installation defects: the center point of the measurement mark is marked on the highest point of the raised part, because when the measurement mark is installed, the highest point of the raised part is prone to tilt (like setting nails on a horizontal plane, the nail is prone to tilt), so the measurement After the sign is installed, its actual center point may be different from the center point of the mark, that is, the installation accuracy is reduced, which will lead to errors in the subsequent measurement of coordinates, and the measurement accuracy is low

[0004] (2) Defects in use: The raised part of the measurement mark is generally an arc (because there will be the highest point on the arc and the measuring equipment can be placed), and the measuring equipment required for measuring coordinates (such as centering) should be set up on the raised arc. rod), the raised arc surface and the measuring equipment are difficult to be firmly fixed, the wind resistance and shock resistance of the raised measuring marks are poor, and the measuring equipment is prone to slipping; when the measuring equipment slips, manual re-alignment is required, which is unavoidable there will be human error

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