阅读说明：本技术 一种用于激光跟踪仪快速点云测量的方法及其辅助工装 (Method for rapid point cloud measurement of laser tracker and auxiliary tool thereof ) 是由 张威 陶江平 刘序辰 林坚 张作涌 于 2020-05-22 设计创作，主要内容包括：一种用于激光跟踪仪快速点云测量的方法,包括以下步骤：将移动底盘放置被测面上,底盘万向球接触被测面；靶球基座插入移动底盘的圆形开孔,基座万向球与被测面接触；将靶球放入基座托台,靶球外壳与磁铁吸附；换算靶球中心点至靶球基座底端高差值,将靶球中心点理论的位置偏置至被测面；在被测面上按点云的采集需求移动移动底盘,基座万向球在被测面上滚动；提起移动底盘和靶球基座进行存放；本发明将靶球放置在靶球基座内,与移动底盘组合,靶球在接收到激光后,边移动底盘边进行点云测量,避免靶球与被测面直接接触,无摩擦损耗,插销式靶球基座插入底盘后指向精准,随被测面起伏进行起伏,确保基座与被测面贴合,提升测量精度。(A method for laser tracker fast point cloud measurement, comprising the steps of: placing the movable chassis on the surface to be measured, and contacting the universal ball of the chassis with the surface to be measured; the target ball base is inserted into the round opening of the movable chassis, and the universal ball of the base is contacted with the surface to be detected; putting the target ball into a base saddle, and adsorbing the target ball shell with a magnet; converting the height difference from the central point of the target ball to the bottom end of the target ball base, and offsetting the theoretical position of the central point of the target ball to the measured surface; moving the moving chassis on the measured surface according to the acquisition requirement of the point cloud, and rolling the universal ball of the base on the measured surface; lifting the movable chassis and the target ball base for storage; according to the invention, the target ball is placed in the target ball base and combined with the movable chassis, after the target ball receives laser, the chassis is moved while point cloud measurement is carried out, the target ball is prevented from being in direct contact with a measured surface, no friction loss exists, the bolt type target ball base points accurately after being inserted into the chassis, and fluctuates along with the fluctuation of the measured surface, so that the base is ensured to be attached to the measured surface, and the measurement precision is improved.)

1. A method for laser tracker fast point cloud measurement is characterized by comprising the following steps:

step S1: placing the movable chassis on the surface to be measured, and contacting a chassis universal ball at the lower end of the movable chassis with the surface to be measured;

step S2: inserting a target ball base into a circular opening of a movable chassis, and enabling a base universal ball at the bottom end of the target ball base to be in contact with a measured surface;

step S3: after the target ball receives measuring laser emitted by the laser tracker, the target ball is placed on a base saddle, and a target ball shell is adsorbed with a magnet;

step S4: at the equipment operation end, converting the height difference from the central point of the target ball to the bottom end of the target ball base, and biasing the theoretical position of the central point of the target ball to the measured surface;

step S5: moving the moving chassis on the measured surface according to the acquisition requirement of point cloud, wherein the moving chassis and the measured surface are in a fit state in the moving process, and the base universal ball rolls on the measured surface;

step S6: and after the measurement is finished, the movable chassis and the target ball base are lifted for storage, and the base supporting platform arranged on the target ball base is freely seated on the movable chassis.

2. The method of claim 1, wherein during the measurement, when the moving chassis moves with a well-defined vertical position pointing, the cross-reference line of the upper surface of the moving chassis is used for positioning.

3. The utility model provides an auxiliary fixtures that is used for quick some cloud of laser tracker to measure, a serial communication port, the frock is including removing chassis and target ball base, the upper end on removal chassis is equipped with the cross datum line, the lower extreme that removes the chassis is equipped with the universal ball in chassis, the universal ball in chassis is close to four angles on removal chassis, it is equipped with circular trompil to run through from top to bottom to remove the central authorities on chassis, the upper end of target ball base is equipped with magnet, the lower extreme of target ball base is equipped with the universal ball of base.

4. The auxiliary tool for laser tracker fast point cloud measurement as claimed in claim 3, wherein the target ball base comprises a base pallet, a base body and a base bolt, the base pallet is disc-shaped, the outer diameter of the base pallet is larger than the inner diameter of the circular opening, the base body is cylindrical, the outer diameter of the base body matches with the inner diameter of the circular opening, and the outer diameter of the base bolt is gradually reduced from top to bottom.

5. The auxiliary tool for the rapid point cloud measurement of the laser tracker according to claim 4, wherein a circular groove is formed in the upper end of the base supporting table, and the magnet is located in the groove.

6. The auxiliary tool for the rapid point cloud measurement of the laser tracker according to claim 3, wherein four corners of the movable chassis are provided with chamfers.

Technical Field

The invention relates to the technical field of measurement, in particular to a method for rapid point cloud measurement of a laser tracker and an auxiliary tool thereof.

Background

With the continuous improvement of the current measurement technology, the application of the laser tracker is very popular, and the higher stability and the higher measurement precision of the laser tracker are more and more approved by users. Meanwhile, with the increasing expansion of the application range, other problems in the measurement process are exposed. During the use of the laser tracker, all measurement work must be completed by means of a reflecting ball, commonly called a target ball, due to high precision. The target ball is as the indispensable measurement accessory of laser tracker, and its built-in trilateral light-gathering prism, the precision is high, consequently, also leads to the cost of this target ball to be high, and once damaging, light then influence measurement accuracy, heavy then the target ball is scrapped, so, from the angle consideration of measured economic nature, must do the protection under the prerequisite of guaranteeing efficiency or promotion efficiency to the target ball operating condition.

Practice shows that the point cloud measurement of the laser tracker is mainly suitable for measuring plane flatness and curve line type, under the working condition, a large number of dense observation points need a user to move the target ball at high frequency to complete operation, in order to ensure the measurement precision, the target ball needs to be directly attached to the measured surface, the target ball and the measured surface can form friction in the moving process, and the target ball is accelerated to wear due to long-time measurement; in addition, if the target ball base is used for protection, the measurement efficiency and precision are reduced, and especially when the point cloud of the curved surface is measured, a space fit error is formed between the plane base and the curved surface.

Disclosure of Invention

The invention aims to provide a method for rapid point cloud measurement of a laser tracker and an auxiliary tool thereof, which can improve the measurement efficiency and ensure the measurement precision while protecting a target ball.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a method for laser tracker fast point cloud measurement is characterized by comprising the following steps:

step S1: placing the movable chassis on the surface to be measured, and contacting a chassis universal ball at the lower end of the movable chassis with the surface to be measured;

step S2: inserting a target ball base into a circular opening of a movable chassis, and enabling a base universal ball at the bottom end of the target ball base to be in contact with a measured surface;

step S3: after the target ball receives measuring laser emitted by the laser tracker, the target ball is placed on a base saddle, and a target ball shell is adsorbed with a magnet;

step S4: at the equipment operation end, converting the height difference from the central point of the target ball to the bottom end of the target ball base, and biasing the theoretical position of the central point of the target ball to the measured surface;

step S5: moving the moving chassis on the measured surface according to the acquisition requirement of point cloud, wherein the moving chassis and the measured surface are in a fit state in the moving process, and the base universal ball rolls on the measured surface;

step S6: and after the measurement is finished, the movable chassis and the target ball base are lifted for storage, and the base supporting platform arranged on the target ball base is freely seated on the movable chassis.

Further, in the measuring process, when the movable chassis moves to have a clear vertical position direction, the cross-shaped datum line on the upper surface of the movable chassis is used for positioning.

The utility model provides an auxiliary fixtures that is used for quick some cloud of laser tracker to measure, a serial communication port, the frock is including removing chassis and target ball base, the upper end on removal chassis is equipped with the cross datum line, the lower extreme that removes the chassis is equipped with the universal ball in chassis, the universal ball in chassis is close to four angles on removal chassis, it is equipped with circular trompil to run through from top to bottom to remove the central authorities on chassis, the upper end of target ball base is equipped with magnet, the lower extreme of target ball base is equipped with the universal ball of base.

Further, base saddle, base body and the base bolt that the target ball base from top to bottom connected gradually, the base saddle is discoid, the external diameter of base saddle is greater than the internal diameter of circular trompil, the base body is cylindricly, the external diameter of base body and the internal diameter cooperation of circular trompil, the base bolt external diameter from top to bottom dwindles gradually.

Further, the upper end of the base saddle is provided with a circular groove, and the magnet is positioned in the groove.

The invention has the advantages that: the target ball is placed in the plug pin type target ball base and then combined with the movable chassis, after the target ball receives laser, the chassis can be moved while point cloud measurement is carried out, direct contact between the target ball and a measured surface is avoided, friction loss is avoided, the chassis with the universal ball is high in moving speed, and measuring efficiency is improved; the bolt type target ball base is accurate after being inserted into the chassis, and fluctuates along with the fluctuation of the measured surface, so that the base is ensured to be completely attached to the measured surface, the problem that the traditional target ball plane base cannot be attached to a curved surface is solved, and the measurement precision is improved.

Drawings

FIG. 1 is a schematic view of a mobile chassis of the present invention;

FIG. 2 is a schematic view of a target ball pedestal according to the present invention;

FIG. 3 is a schematic diagram of the method of the present invention.

Reference numerals:

1 moving a chassis;

2, a universal ball with a chassis;

3, circular hole opening;

4, a cross reference line;

5, chamfering;

6 target ball base;

7 a magnet;

8, a base saddle;

9, a base universal ball;

10 target balls;

11, a measured surface;

12 a tracker;

13 measuring laser

14 base body

15 base latch.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention discloses a method for rapid point cloud measurement of a laser tracker, which comprises the following steps:

step S1: placing a movable chassis 1 on a tested surface 11, and contacting a chassis universal ball 2 at the lower end of the movable chassis 1 with the tested surface 11;

step S2: inserting a target ball base 6 into the circular opening 3 of the movable chassis 1, and contacting a base universal ball 9 at the bottom end of the target ball base 6 with a detected surface 11;

step S3: after the target ball 10 receives the measuring laser 13 emitted by the laser tracker 12, the target ball 10 is placed on the base saddle 8, and the shell of the target ball 10 is adsorbed to the magnet 7;

step S4: at the equipment operation end, converting the height difference from the central point of the target ball 10 to the bottom end of the target ball base 6, and offsetting the theoretical position of the central point of the target ball 10 to the measured surface 11;

step S5: moving the moving chassis 1 on the measured surface 11 according to the acquisition requirement of point cloud, wherein the moving chassis 1 is in a joint state with the measured surface 11 in the moving process, and the base universal ball 9 rolls on the measured surface 11;

if the measured surface 11 is a curved surface or has fluctuation, the target ball base 6 in the central circular hole of the movable chassis 1 is always attached to the measured surface 11 along with gravity, so that the height of the center of the target ball 10 is consistent with that of the measured surface 11;

step S6: and after the measurement is finished, the movable chassis 1 and the target ball base 6 are lifted for storage, and the base saddle 8 arranged on the target ball base 6 is freely seated on the movable chassis 1.

When the movable chassis 1 and the target ball base 6 are used to measure the vertical or tilted surface 11 to be measured, the target ball base 6 needs to be kept pressed against the surface 11 to be measured.

During the measurement, when the movable chassis 1 moves to have a clear vertical position direction, the cross reference line 4 on the upper surface of the movable chassis 1 is used for positioning.

The utility model provides an auxiliary fixtures for laser tracker quick point cloud is measured, as shown in fig. 1 and fig. 2, the frock is including removing chassis 1 and target ball base 6, the upper end of removing chassis 1 is equipped with cross reference line 4, the lower extreme that removes chassis 1 is equipped with chassis universal ball 2, chassis universal ball 2 is close to four angles that remove chassis 1, it is equipped with circular trompil 3 to run through from top to bottom to remove the central authorities on chassis 1, the upper end of target ball base 6 is equipped with magnet 7, the lower extreme of target ball base 6 is equipped with base universal ball 9.

As shown in figure 1, four corners of the movable chassis 1 are provided with semicircular chamfers 5, and due to safety considerations, the design avoids the damage of the edge tip of the tool to a human body, so that the movable chassis is easy to store.

Target ball base 6 from top to bottom connects gradually base saddle 8, base body 14 and base bolt 15, base saddle 8 is discoid, the external diameter of base saddle 8 is greater than the internal diameter of circular trompil 3, base body 14 is cylindricly, the external diameter of base body 14 and the internal diameter cooperation of circular trompil 3, base bolt 15 from top to bottom external diameter dwindles gradually, the upper end of base saddle 8 is equipped with the circular shape recess, magnet 7 is located the recess.