Multi-point suspension height measuring method for large-scale structural member

Abstract

The invention discloses a multi-point suspension height measuring method for a large-scale structural member, which comprises the following steps: mounting a measuring rod below a measuring target point, mounting a laser range finder at the top of the measuring rod, and erecting a level gauge within the scale measuring range of the measuring rod; turning on laser of the laser range finder to align a laser point with a measurement target point; correcting the measuring rod, and measuring the distance between the top of the measuring rod and the target point through a laser range finder; and carrying out level scale observation by aiming at the measuring rod through a level gauge, taking the height of the first control point as a reference, and calculating the height from the target point to the reference ground through a formula: HB = LB + Lscale + (Hhorizontal B-Hhorizontal base), thereby completing the measurement. The method is easy to operate and high in measurement efficiency and precision, and measurement data can meet high-precision installation work of large structural parts.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and in particular relates to a multi-point suspended height measurement method for a large structural component. Background Art

[0002] At present, many aerial equipment need to be installed on the basis of large structural parts, or the equipment itself is composed of large structural parts and erected in the air, so the elevation measurement and control of its important installation points greatly affect the overall accuracy of the equipment and its future operation status. Since these control points are at a high altitude and involve a large measurement area, there are usually many points. How to quickly, efficiently, accurately and cost-effectively measure the elevation of important control points of large steel structures in the air has become an urgent problem to be solved.

[0003] In the prior art, such as Figure 1 As shown, the total station's suspended height measurement function is used for measurement. During the measurement process, when the total station is set up at a long distance, it can only observe the side of the target point, rather than the bottom horizontal plane that actually needs to be measured, which causes a large error. When the total station is set up at a close distance, the elevation angle will be too large, and the measurement error will increase; and the deviation in the placement of the reference point will eventually lead to inaccurate measurement results; when the measured distance is 1 km, the instrument's ranging accuracy is 1mm+2ppm×1(km)=3mm, that is, when the total station measures 1km, the maximum ranging error is no more than 3mm; the influence of the distance measurement error is within the controllable range; the general total station angle measurement accuracy is 1.0 second. With the increase of the measurement distance, the measurement error increases significantly at a large elevation angle; the prism of the marker pole is not upright, and when aiming, it is not aimed at the bottom of the target pole, which will also cause the measurement error to increase.

[0004] Therefore, in view of the above-mentioned characteristics of limited angle measurement range, target point deviation, measurement reference point placement deviation, distance measurement error, angle measurement error and large target eccentricity error, it is necessary to provide a multi-point suspended height measurement method for large structural parts to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a multi-point suspended height measurement method for a large structural member.

[0006] The multi-point suspended height measurement method of a large structural member of the present invention comprises:

[0007] S1. Install the measuring rod below the measuring target point, install the laser rangefinder on the top of the measuring rod, and set up a level within the scale range of the measuring rod;

[0008] S2. Turn on the laser rangefinder laser and align the laser point with the measurement target point;

[0009] S3, correct the measuring rod, and measure the distance between the top of the measuring rod and the target point by using a laser rangefinder;

[0010] S4. Use the level instrument to aim the measuring rod to observe the level scale, take the height of the first control point as the reference, and calculate the height from the target point to the reference ground to complete the measurement.

[0011] Furthermore, in the above-mentioned multi-point suspended height measurement method for large structural parts, in step S3, when the measuring rod is corrected, the measuring rod is first corrected to a vertical state by observing the horizontal bubble on the measuring rod, while ensuring that the laser is still aligned with the measurement target point, and the bottom of the measuring rod is finally adjusted to the intersection of the plumb line of the target point and the ground.

[0012] Furthermore, in the above-mentioned multi-point suspension height measurement method for large structural parts, in step S5, H is used in the calculation. B =L B +L 标 +(H 水平B -H 水平基 );

[0013] Among them, H B To measure the distance between the target point and the ground; L B is the distance between the top of the measuring rod and the target point; L 标 H is the length of the measuring rod; 水平B H is the distance from the level to the target point; 水平基 is the distance from the level to the reference measuring point.

[0014] Furthermore, in the above-mentioned multi-point suspended height measurement method for large structural parts, the measuring rod is a standard part.

[0015] The multi-point suspended height measurement method of large structural parts of the present invention has the following advantages and beneficial effects:

[0016] The angle measurement range of the present invention is not limited. The laser point irradiation of the laser rangefinder can accurately point to the target point on the bottom horizontal plane of the target object and accurately find the reference point. Within the measuring range, the measurement distance error does not change, the measurement parameters are small, the cumulative measurement error is effectively reduced, the measurement efficiency is effectively improved, and the measurement data can meet the high-precision installation operations of large structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 A schematic diagram of a multi-point suspended height measurement method for large structural parts in the prior art;

[0019] Figure 2 It is a schematic diagram of the multi-point suspension height measurement method of a large structural member of the present invention.

[0020] Description of reference numerals:

[0021] 1: Measuring rod; 2: Laser rangefinder; 3: Level. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 2 As shown, the multi-point suspended height measurement method of a large structural member of the present invention comprises:

[0025] S1. Install the measuring rod below the measuring target point B, install the laser rangefinder on the top of the measuring rod, and set up a level within the scale range of the measuring rod;

[0026] S2, turn on the laser rangefinder laser and align the laser point with the measurement target point B;

[0027] S3. Correct the measuring rod and use the laser rangefinder to measure the distance L between the top of the measuring rod and the target point. B ;

[0028] S4. Use the level to aim the measuring rod and observe the level scale to measure H. 水平B , using the height of the first control point as the reference, measure H 水平基 , and calculate the height from the target point to the reference ground to complete the measurement.

[0029] Furthermore, in the above-mentioned multi-point suspended height measurement method for large structural parts, in step S3, when the measuring rod is corrected, the measuring rod is first corrected to a vertical state by observing the horizontal bubble on the measuring rod, while ensuring that the laser is still aligned with the measurement target point, and the bottom of the measuring rod is finally adjusted to the intersection point B' of the plumb line of the target point and the ground.

[0030] Furthermore, in the above-mentioned multi-point suspension height measurement method for large structural parts, in step S5, H is used in the calculation. B =L B +L 标 +(H 水平B -H 水平基 );

[0031] Among them, H B To measure the distance between the target point B and the ground B`; L B is the distance between the top of the measuring rod and the target point B; L 标 H is the length of the measuring rod; 水平B H is the distance from the level to the target point B; 水平基 is the distance from the level to the reference measuring point.

[0032] Furthermore, in the above-mentioned multi-point suspension height measurement method for large structural parts, the measuring rod is a standard part, so the length of the measuring rod is fixed. B , H 水平B , H 水平基 Measurement.

[0033] In summary, compared with the prior art, the multi-point suspended height measurement method of large structural parts of the present invention has the following advantages and beneficial effects: the angle measurement range of the present invention is not limited, and the laser point irradiation of the laser rangefinder can accurately point to the target point on the bottom horizontal plane of the target object, and accurately find the reference point. Within the measuring range, the measurement distance error does not change, the measurement parameters are small, the cumulative measurement error is effectively reduced, the measurement efficiency is effectively improved, and the measurement data can meet the high-precision installation operations of large structural parts.

[0034] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-point suspended height measurement method for large structural parts, characterized in that: The multi-point suspended height measurement method of the large structural member comprises: S1. Install the measuring rod below the measuring target point, install the laser rangefinder on the top of the measuring rod, and set up a level within the scale range of the measuring rod; S2. Turn on the laser rangefinder laser and align the laser point with the measurement target point; S3, correct the measuring rod, and measure the distance between the top of the measuring rod and the target point by using a laser rangefinder; S4. Use the level instrument to aim the measuring rod to observe the level scale, take the height of the first control point as the reference, and calculate the height from the target point to the reference ground to complete the measurement.

2. The multi-point suspended height measurement method of a large structural member according to claim 1 is characterized in that: In step S3, when correcting the measuring rod, first observe the horizontal bubble on the measuring rod and continuously correct the measuring rod to a vertical state, while ensuring that the laser is still aligned with the measurement target point, and then adjust the bottom of the measuring rod to finally align with the intersection of the plumb line of the target point and the ground.

3. The multi-point suspended height measurement method for large structural parts according to claim 1 is characterized in that: In step S5, H is used in the calculation B =L B +L 标 +(H 水平B -H 水平基 ); Among them, H B To measure the distance between the target point and the ground; L B is the distance between the top of the measuring rod and the target point; L 标 H is the length of the measuring rod; 水平B H is the distance from the level to the target point; 水平基 is the distance from the level to the reference measuring point.

4. The multi-point suspended height measurement method for large structural parts according to claim 1 is characterized in that: The measuring rod is a standard part.

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