Combined tool for intersection measurement of laser tracker and total station
By designing a combined tool for laser trackers and total stations, the problems of the measurement ranges of laser trackers and total stations in actual applications are solved, and the measurement ranges of laser trackers and total stations are greatly affected by the environment, the accuracy increases with distance and the local detection accuracy is difficult to ensure, and the interactive detection and detection accuracy of large-scale engineering measurements are improved.
Patent Information
- Application Number
- CN202421586111.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-05
AI Technical Summary
In practical applications, laser trackers and total stations have problems such as large environmental impacts, serious losses as the accuracy increases with distance, and difficult to guarantee local detection accuracy.
A combined tool for intersecting measurement of laser trackers and total stations is designed, including a plane acquisition block, a curved acquisition block, a total station acquisition component, a connector and a baffle. Through the combination of these components, the intersection acquisition of feature points of the surface of the workpiece being measured is achieved.
It realizes interactive detection of large-scale engineering measurements, improves detection accuracy, overcomes the defects of laser trackers and total stations when they are used alone, and expands the spatial measurement range of laser trackers.
Smart Images
Figure CN222784108U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of detection, in particular to a combined tooling for intersection measurement of a laser tracker and a total station. Background Art
[0002] Laser tracker is a new type of spatial position relationship detection equipment developed in the past decade. It integrates laser interferometer ranging technology, photoelectric detection technology, precision machinery technology, computer and control technology, modern numerical calculation theory, etc. It can track spatial targets and measure the spatial three-dimensional coordinates of targets in real time. It has the advantages of convenient installation, simple operation, real-time scanning measurement, high measurement accuracy and efficiency, and is known as the "portable CMM (three-coordinate measuring machine)". However, in the field application of laser tracking detection technology, laser trackers are greatly affected by environmental factors. Among them, due to the special nature of the laser tracker's detection light that cannot be blocked, whether one-stop visibility can be achieved in the detection conditions is the key to whether the detection project can be carried out. However, when using laser trackers to detect the spatial position relationship of industrial equipment, due to some reasons such as the on-site environment and equipment layout of industrial equipment, there are always some important equipment feature points on the equipment site, such as deep pits, obstructions, high places and other hidden points that cannot be collected within the scope of one station, which will inevitably lead to some important position relationships of industrial detection projects being unable to be carried out due to light obstruction, or unnecessary detection accuracy loss due to the station transfer operation when avoiding obstructions.
[0003] Total station, also known as total station electronic tachometer, is an automated, digital three-dimensional coordinate measurement and positioning system that combines electronic angle measurement, electronic distance measurement, data calculation and transmission. It is widely used in geodetic surveying, engineering surveying, topographic surveying, cadastral and real estate surveying, construction surveying, deformation observation and other fields. It is the most widely used and most versatile "coordinate measuring machine" in surveying and mapping. With the improvement of the measurement accuracy and automation of total stations, the three-dimensional coordinate measurement system composed of high-precision total stations has been deeply applied and promoted in the industrial field. The detection range of total stations can reach 50-100m, which is suitable for large-scale detection of roll systems and rolling mills of metallurgical equipment units. However, the local detection accuracy of total station detection is difficult to guarantee, usually 0.3-0.5mm, which cannot guarantee the accuracy requirements of the spatial position of cold rolling, hot rolling and other equipment.
[0004] Laser trackers and total stations are both very effective detection equipment in industrial measurement technology, but the measurement range of laser trackers is greatly affected by the environment, and the accuracy is greatly reduced as the distance increases. Although the total station has a large detection distance, the single-point accuracy within a small range is limited. Therefore, both laser trackers and total stations have certain limitations in practical applications. Summary of the invention
[0005] The technical problem to be solved by the utility model is to provide a combined tooling for intersection measurement of a laser tracker and a total station. The combined tooling overcomes the defects of the laser tracker and the total station used alone, and can realize the intersection collection of surface feature points of the measured workpiece, thereby realizing interactive detection of large-scale engineering measurement and improving detection accuracy.
[0006] In order to solve the above technical problems, the utility model provides a combined tooling for intersection measurement of a laser tracker and a total station, comprising a plane acquisition block, a curved surface acquisition block, a total station acquisition assembly, a connector and a baffle;
[0007] The top surface of the planar collection block is provided with a coaxial first step countersunk hole downward, and the diameter of the lower countersunk hole of the first step countersunk hole is smaller than the diameter of the upper countersunk hole. The side surface of the planar collection block is provided with a notch along the height direction, and one side of the notch is flush with the axis of the first step countersunk hole, and the baffle is inserted into the notch;
[0008] The top surface of the arc surface collection block is provided with a coaxial second stepped countersunk hole downward, and the lower countersunk hole diameter of the second stepped countersunk hole is smaller than the upper countersunk hole diameter; the bottom surface of the arc surface collection block is provided with a dovetail groove, and the dovetail groove is coaxially arranged with the second stepped countersunk hole;
[0009] The total station acquisition assembly includes a concave frame, a rotating shaft and a measuring light target, wherein a through hole is provided at the bottom center of the concave frame, the rotating shaft is provided at two ends of the top of the concave frame, the measuring light target is provided at the rotating shaft, and the vertical center line of the measuring light target is coaxial with the through hole, and the horizontal center line is coaxial with the rotating shaft;
[0010] The connecting part includes a center positioning shaft, a support extension shaft and a connecting screw which are coaxially arranged from bottom to top. During detection, the center positioning shaft and the support extension shaft are inserted into the first step countersunk hole of the plane acquisition block or the second step countersunk hole of the arc surface acquisition block according to the measurement object, and the connecting screw is inserted into the bottom through hole of the concave frame of the total station acquisition component and fastened with a nut.
[0011] Furthermore, the length of the central positioning axis of the connecting member is less than or equal to the depth of the lower countersink of the first step countersink of the plane collection block and the lower countersink of the second step countersink of the arc surface collection block, and the length of the support extension axis is greater than or equal to the depth of the upper countersink of the first step countersink of the plane collection block and the upper countersink of the second step countersink of the arc surface collection block.
[0012] Furthermore, the side of the baffle plate flush with the axis of the first stepped counterbore of the plane acquisition block is a measuring surface, and the measuring surface of the baffle plate and the measuring surface of the measuring light target of the total station acquisition assembly are respectively applied with optical reflective films.
[0013] Furthermore, the diameter of the lower countersink of the first step countersink of the plane collection block and the diameter of the lower countersink of the second step countersink of the arc surface collection block are 15 mm, and the diameter of the upper countersink is 25 mm.
[0014] Furthermore, the flatness of the baffle is ≤0.01 mm.
[0015] The laser tracker and total station intersection measurement method using the above combined tooling includes the following steps:
[0016] Step 1: Plane feature point measurement: select plane acquisition blocks, total station acquisition components and connectors according to the surface size of the measured object and the on-site working conditions;
[0017] Place the plane acquisition block steadily on the cleaned surface of the measurement object, place the measurement target ball of the laser tracker in the upper countersunk hole of the first step countersunk hole on the top of the plane acquisition block, and use the laser tracker to collect the feature information of the feature point at the position of the measurement object;
[0018] The height deviation between the feature points collected by the laser tracker and the actual feature points of the measured object is L1. If the measurement result is flatness or relative elevation, no compensation is required. If the measurement result is absolute elevation, the height of L1 needs to be calibrated in the laboratory. In the coordinate system of the laser tracker, the absolute height L1 is subtracted from the collected feature points in the elevation direction to obtain the feature information of the actual feature points of the measured object.
[0019] The plane acquisition block and the total station acquisition component are assembled into a whole through a connecting piece, and the measuring surface of the measuring light target of the total station acquisition component faces the total station;
[0020] Place the plane acquisition block steadily on the cleaned surface of the measurement object, rotate the measurement light target of the total station acquisition component, and after meeting the measurement requirements of the total station, use the total station to collect the center point of the measurement light target of the total station acquisition component. The height deviation between the feature points collected by the total station and the actual feature points of the measurement object is L2. If the measurement result is an absolute elevation, the height of L2 needs to be calibrated in the laboratory. In the coordinate system of the total station, the absolute height L2 is subtracted from the collected feature points in the elevation direction to obtain the feature information of the actual feature points of the measurement object.
[0021] Move the plane acquisition block to the remaining feature points of the measured object in sequence, repeat the measurement process of the laser tracker and the total station, until the feature information of the feature points of the measured object is fully acquired, fit, analyze and calculate the acquired feature point information, and obtain the plane feature point information of the measured object;
[0022] Step 2: Measure arc surface feature points. Select arc surface acquisition blocks, total station acquisition components and connectors according to the surface size of the measured object and the on-site working conditions.
[0023] Place the arc surface acquisition block steadily on the cleaned arc surface of the measurement object, place the measuring target ball of the laser tracker in the upper countersunk hole of the second step countersunk hole on the top of the arc surface acquisition block, and use the laser tracker to collect the feature information of the feature point at the position of the measurement object;
[0024] The deviation between the feature points collected by the laser tracker and the actual feature points of the measured object in the radial direction of the arc is L3. If the measurement result is flatness or relative elevation, no compensation is required. If the measurement result is absolute elevation, the height of L3 needs to be calibrated in the laboratory. In the coordinate system of the laser tracker, the absolute height L3 is subtracted from the collected feature points in the radial direction of the arc to obtain the feature information of the actual feature points of the measured object.
[0025] The arc surface collection block and the total station collection component are assembled into a whole through a connecting piece, and the measuring surface of the measuring light target of the total station collection component faces the total station;
[0026] Place the arc surface acquisition block steadily on the cleaned arc surface of the measurement object, rotate the measurement light target of the total station acquisition component, and after meeting the measurement requirements of the total station, use the total station to collect the center point of the measurement light target of the total station acquisition component. The height deviation between the feature points collected by the total station and the actual feature points of the measurement object is L4. If the measurement result is an absolute elevation, the height of L4 needs to be calibrated in the laboratory. In the coordinate system of the total station, subtract the absolute height L4 from the collected feature points in the elevation direction to obtain the feature information of the actual feature points of the measurement object. If the measurement result is an absolute elevation, the height of L4 needs to be calibrated in the laboratory. In the coordinate system of the total station, subtract the absolute height L4 from the collected feature points in the radial direction of the arc to obtain the feature information of the actual feature points of the measurement object.
[0027] Move the arc surface acquisition block to the remaining feature points of the measured object in sequence, repeat the measurement process of the laser tracker and the total station, until the feature information of the feature points of the measured object is fully acquired, fit, analyze and calculate the acquired feature point information, and obtain the arc surface feature point information of the measured object;
[0028] Step 3: Measure and place ground feature points. Select plane acquisition blocks, connectors and baffles according to the surface size of the measured object and the on-site working conditions.
[0029] Place the plane acquisition block steadily on the cleaned surface of the ground measurement object, place the measurement target ball of the laser tracker in the upper countersunk hole of the first step countersunk hole on the top of the plane acquisition block, and use the laser tracker to collect the feature information of the feature point at this position of the ground measurement object; analyze the collected feature point information through laser tracking, adjust the position of the plane acquisition block according to the measurement results, and repeat the above feature point information collection and analysis process until the collected ground feature points meet the point placement requirements;
[0030] Insert the baffle into the slot of the plane acquisition block, with the measuring surface of the baffle facing the laser tracker, and place the point according to the position of the baffle; the measuring target ball of the laser tracker is placed in the upper countersunk hole of the first step countersunk hole on the top of the plane acquisition block, with the measuring surface of the baffle facing the laser tracker and aligned with the point placement position on the ground, and use the laser tracker to collect the feature information of the ground feature point.
[0031] Since the utility model adopts the above-mentioned technical scheme for the combined tooling for intersection measurement of laser tracker and total station, that is, the combined tooling includes a plane acquisition block, a curved surface acquisition block, a total station acquisition component, a connector and a baffle, the plane acquisition block and the curved surface acquisition block are respectively provided with stepped countersunk holes on the top surface, the baffle is arranged in the notch on one side of the plane acquisition block, the curved surface acquisition block is provided with a dovetail groove on the bottom surface, the total station acquisition component is composed of a concave frame, a rotating shaft and a measuring light target, and the total station acquisition component is assembled into a whole with the plane acquisition block or the curved surface acquisition block through the connector; the combined tooling realizes the measurement of the plane feature points of the measured object, the measurement of the curved surface feature points, and the measurement and placement of the ground feature points by combining the total station acquisition component with the plane acquisition block or the curved surface acquisition block. The combined tooling overcomes the defects of the laser tracker and the total station being used alone, and can realize the intersection acquisition of the surface feature points of the measured workpiece, thereby realizing the interactive detection of large-scale engineering measurement and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:
[0033] Figure 1 This is a schematic diagram of the plane acquisition block in this combined tooling;
[0034] Figure 2 for Figure 1 A top view of
[0035] Figure 3 This is a schematic diagram of the arc surface collection block in this combined tooling;
[0036] Figure 4 for Figure 3 A top view of
[0037] Figure 5 This is a schematic diagram of the total station acquisition component in this combined tooling;
[0038] Figure 6 This is a schematic diagram of the connecting parts in this combined tooling;
[0039] Figure 7 Schematic diagram of the laser tracker measurement of plane feature points in this method;
[0040] Figure 8This is a schematic diagram of the total station measurement of plane feature points in this method;
[0041] Fig. 9 This is a schematic diagram of the measurement of arc surface feature points by a laser tracker in this method;
[0042] Fig.10 Schematic diagram of total station measurement of arc surface feature points in this method. DETAILED DESCRIPTION
[0043] Implementation example Figures 1 to 6 As shown, the combined tooling for intersection measurement of a laser tracker and a total station of the utility model comprises a plane acquisition block 1, a curved surface acquisition block 2, a total station acquisition assembly 3, a connecting piece 4 and a baffle 5;
[0044] The top surface of the plane collection block 1 is provided with a coaxial first step countersunk hole 11 downward, and the diameter of the lower countersunk hole 12 of the first step countersunk hole 11 is smaller than the diameter of the upper countersunk hole 13. The side surface of the plane collection block 1 is provided with a notch 14 along the height direction, and one side of the notch 14 is flush with the axis of the first step countersunk hole 11, and the baffle 5 is inserted into the notch 14;
[0045] The bottom of the plane acquisition block is a plane with high flatness processing requirements, which can collect feature points of workpieces with flat surfaces. The top is processed with a hole with a diameter of 25mm (according to the size of the target ball of the laser tracker) for contact with the target ball of the laser tracker. The bottom of the 25mm hole is processed with a 15mm positioning hole with high concentricity requirements for connection and positioning with the total station acquisition component; a notch is processed at the center of the side of the plane acquisition block for installing a baffle for collecting ground mark points, and one side of the notch is in line with the horizontal center line of the plane acquisition block;
[0046] The top surface of the arc surface collection block 2 is provided with a coaxial second stepped countersunk hole 21 downward, and the diameter of the lower countersunk hole 22 of the second stepped countersunk hole 21 is smaller than the diameter of the upper countersunk hole 23. The bottom surface of the arc surface collection block 2 is provided with a dovetail groove 24, and the dovetail groove 24 is coaxially arranged with the second stepped countersunk hole 21;
[0047] A dovetail groove is machined on the bottom of the arc surface collection block, which contacts the surface of the roller shaft, ensuring that the arc surface collection block or the entire combined tooling is stably placed on the measurement object on the arc surface, so as to collect the surface feature points of the roller shaft workpiece on the arc surface; a hole with a diameter of Ф25mm (according to the target ball size of the laser tracker) is machined on the top of the arc surface collection block, which is used to contact the target ball of the laser tracker. A Ф15mm positioning hole with a higher concentricity requirement is machined at the bottom of the Ф25mm hole. Different from the plane collection block, the center of the dovetail groove at the bottom of the arc surface collection block is concentric with the hole with a diameter of Ф25mm and the Ф15mm positioning hole concentric with it.
[0048] The total station acquisition assembly 3 includes a concave frame 31, a rotating shaft 32 and a measuring light target 33. A through hole 34 is provided at the bottom center of the concave frame 31. The rotating shaft 32 is provided at both ends of the top of the concave frame 31. The measuring light target 33 is provided on the rotating shaft 32. The vertical center line of the measuring light target 33 is coaxial with the through hole 34, and the horizontal center line is coaxial with the rotating shaft 32.
[0049] The measuring light target of the total station acquisition component has the total station detection reflector measurement function such as accurate positioning of the center point. According to the height size of the measuring light target, a rotating shaft is installed at the same height as the center height of the measuring light target above the concave frame. The rotating shaft is fixed at the center height position of the measuring light target. The measuring light target can rotate around the center line of the light target through the rotating shaft on the concave frame; the purpose of installing the rotating shaft is to enable the measuring light target to rotate around the center height center line of the measuring light target to ensure that the angle of the total station light target detection meets the total station detection viewing angle requirements; the bottom of the concave frame is processed with a through hole connected to the connecting piece, and the total station acquisition component can be fixed on the connecting piece and placed on the plane acquisition block or the arc acquisition block to realize the overall assembly of the combined tooling;
[0050] The connecting member 4 includes a center positioning shaft 41, a support extension shaft 42 and a connecting screw 43 coaxially arranged from bottom to top. During detection, the center positioning shaft 41 and the support extension shaft 42 are inserted into the first step countersunk hole 11 of the plane acquisition block 1 or the second step countersunk hole 21 of the arc surface acquisition block 2 according to the measurement object, and the connecting screw 43 is inserted into the bottom through hole 34 of the concave frame 31 of the total station acquisition component 3, and fastened with a nut.
[0051] The main function of the connector is to connect the plane acquisition block or the arc surface acquisition block with the total station acquisition component. The connector is composed of a group of concentric shafts. The diameter of the center positioning shaft at the bottom of the connector is the same as the aperture of the Ф15mm hole of the plane acquisition block or the arc surface acquisition block, and the length is less than or equal to the depth of the Ф15mm hole of the plane acquisition block or the arc surface acquisition block. The center positioning shaft is mainly used for the center positioning function of the connector. Through the simple assembly of the hole shaft, it can be ensured that the center of the plane acquisition block or the arc surface acquisition block connected by the connector is in a straight line with the center of the total station acquisition component; the diameter of the support extension shaft in the middle of the connector must be less than or equal to the aperture of the Ф25mm hole at the top of the plane acquisition block or the arc surface acquisition block. The length of the support extension shaft can be equal to or greater than the depth of the Ф25mm diameter hole at the top of the plane collection block or the arc surface collection block. The main function of the support extension shaft is to place the connector and the total station measurement component connected to it on the Ф25mm diameter hole at the top of the plane collection block or the arc surface collection block, and the length of the support extension shaft can be extended according to the on-site line of sight and the height of the measured workpiece, and several different lengths of support extension shaft connectors can also be made for easy on-site use; the upper part of the connector is a screw, which passes through the through hole at the bottom of the total station collection component, and then is locked with a nut to fix the total station collection component on the connector and place it on the plane collection block or the arc surface collection block to complete the overall assembly of the combined tooling.
[0052] Preferably, the length of the central positioning axis 41 of the connecting member 4 is less than or equal to the depth of the lower countersink 12 of the first step countersink 11 of the plane collection block 1 and the lower countersink 22 of the second step countersink 21 of the arc surface collection block 2, and the length of the supporting extension axis 42 is greater than or equal to the depth of the upper countersink 13 of the first step countersink 11 of the plane collection block 1 and the upper countersink 23 of the second step countersink 21 of the arc surface collection block 2.
[0053] Preferably, the side of the baffle 5 flush with the axis of the first stepped counterbore 11 of the plane acquisition block 1 is the measuring surface, and the measuring surface of the baffle 5 and the measuring surface of the measuring light target 33 of the total station acquisition assembly 3 are respectively applied with optical reflective films.
[0054] Preferably, the diameters of the lower countersunk hole 12 of the first step countersunk hole 11 of the plane collection block 1 and the lower countersunk hole 22 of the second step countersunk hole 21 of the arc surface collection block 2 are 15 mm, and the diameters of the upper countersunk holes 13 and 23 are 25 mm.
[0055] Preferably, the flatness of the baffle 5 is ≤0.01 mm.
[0056] The laser tracker and total station intersection measurement method using the above combined tooling includes the following steps:
[0057] Step 1: Figure 7 and Figure 8As shown, for plane feature point measurement, a plane acquisition block 1, a total station acquisition component 3 and a connector 4 are selected according to the surface size of the measurement object and the on-site working conditions;
[0058] Place the plane acquisition block 1 steadily on the cleaned surface of the measurement object, place the measurement target ball 6 of the laser tracker in the upper countersunk hole 13 of the first stepped countersunk hole at the top of the plane acquisition block 1, and use the laser tracker to collect feature information of the feature point at the position of the measurement object;
[0059] The height deviation between the feature points collected by the laser tracker and the actual feature points of the measured object is L1. If the measurement result is flatness or relative elevation, no compensation is required. If the measurement result is absolute elevation, the height of L1 needs to be calibrated in the laboratory. In the coordinate system of the laser tracker, the absolute height L1 is subtracted from the collected feature points in the elevation direction to obtain the feature information of the actual feature points of the measured object.
[0060] The plane acquisition block 1 and the total station acquisition component 3 are assembled into a whole through the connecting piece 4, and the measuring surface of the measuring light target 33 of the total station acquisition component 3 faces the total station;
[0061] Place the plane acquisition block 1 steadily on the cleaned surface of the measurement object, rotate the measurement light target 33 of the total station acquisition component 3, and after meeting the measurement requirements of the total station, collect the center point of the measurement light target 33 of the total station acquisition component 3 through the total station. The height deviation between the feature point collected by the total station and the actual feature point of the measurement object is L2. If the measurement result is an absolute elevation, the height of L2 needs to be calibrated in the laboratory. In the coordinate system of the total station, the absolute height L2 is subtracted from the collected feature point in the elevation direction to obtain the feature information of the actual feature point of the measurement object;
[0062] Move the plane acquisition block 1 to the remaining feature points of the measured object in sequence, repeat the measurement process of the laser tracker and the total station, until the feature information of the feature points of the measured object is fully acquired, fit, analyze and calculate the acquired feature point information, and obtain the plane feature point information of the measured object;
[0063] Step 2: Fig. 9 and Fig.10 As shown, for arc surface feature point measurement, arc surface acquisition block 2, total station acquisition component 3 and connector 4 are selected according to the surface size of the measured object and the on-site working conditions;
[0064] Place the arc surface acquisition block 2 steadily on the cleaned arc surface of the measurement object, place the measurement target ball 6 of the laser tracker in the upper countersunk hole 23 of the second stepped countersunk hole at the top of the arc surface acquisition block 2, and use the laser tracker to collect the feature information of the feature point at the position of the measurement object;
[0065] The deviation between the feature points collected by the laser tracker and the actual feature points of the measured object in the radial direction of the arc is L3. If the measurement result is flatness or relative elevation, no compensation is required. If the measurement result is absolute elevation, the height of L3 needs to be calibrated in the laboratory. In the coordinate system of the laser tracker, the absolute height L3 is subtracted from the collected feature points in the radial direction of the arc to obtain the feature information of the actual feature points of the measured object.
[0066] The arc surface collection block 2 and the total station collection component 3 are assembled into a whole through the connecting piece 4, and the measuring surface of the measuring light target 33 of the total station collection component 3 faces the total station;
[0067] Place the arc surface acquisition block 2 stably on the cleaned arc surface of the measurement object, rotate the measurement light target 33 of the total station acquisition component 3, and after meeting the measurement requirements of the total station, collect the center point of the measurement light target 33 of the total station acquisition component 3 through the total station. The height deviation between the feature points collected by the total station and the actual feature points of the measurement object is L4. If the measurement result is an absolute elevation, the height of L4 needs to be calibrated in the laboratory. In the coordinate system of the total station, the absolute height L4 is subtracted from the collected feature points in the elevation direction, which is the feature information of the actual feature points of the measurement object. If the measurement result is an absolute elevation, the height of L4 needs to be calibrated in the laboratory; in the coordinate system of the total station, the absolute height L4 is subtracted from the collected feature points in the radial direction of the arc, which is the feature information of the actual feature points of the measurement object;
[0068] Move the arc surface acquisition block 2 to the remaining feature points of the measured object in sequence, repeat the measurement process of the laser tracker and the total station, until the feature information of the feature points of the measured object is fully acquired, fit, analyze and calculate the acquired feature point information, and obtain the arc surface feature point information of the measured object;
[0069] Step 3: Measure and place ground feature points. Select plane acquisition blocks, connectors and baffles according to the surface size of the measured object and the on-site working conditions.
[0070] Place the plane acquisition block steadily on the cleaned surface of the ground measurement object, place the measurement target ball of the laser tracker in the upper countersunk hole of the first step countersunk hole on the top of the plane acquisition block, and use the laser tracker to collect the feature information of the feature point at this position of the ground measurement object; analyze the collected feature point information through laser tracking, adjust the position of the plane acquisition block according to the measurement results, and repeat the above feature point information collection and analysis process until the collected ground feature points meet the point placement requirements;
[0071] Insert the baffle into the slot of the plane acquisition block, with the measuring surface of the baffle facing the laser tracker, and place the point according to the position of the baffle; the measuring target ball of the laser tracker is placed in the upper countersunk hole of the first step countersunk hole on the top of the plane acquisition block, with the measuring surface of the baffle facing the laser tracker and aligned with the point placement position on the ground, and use the laser tracker to collect the feature information of the ground feature point.
[0072] Ground feature points refer to the original benchmarks placed on the ground at the equipment site during the installation and maintenance of the production line equipment for the installation and adjustment of the equipment centerline, parallelism, verticality and equipment height. Traditionally, ground feature points are detected by total stations during the installation phase, and the total station also collects ground feature point information for adjustment and maintenance during the equipment maintenance process. However, the detection and collection accuracy of total stations is low. This method can realize the collection and placement of ground feature points using laser trackers.
[0073] The above details the combination and measurement methods of the combined tooling in three situations: plane, arc surface, and ground feature points. Users can use the plane acquisition block, arc surface acquisition block, total station acquisition component and corresponding connectors according to the actual situation on site, and select suitable measuring equipment for surface feature point acquisition according to the actual measurement conditions on site. If distance detection is required, calibration compensation is required in the laboratory, and the laser tracker and total station are used to collect the surface feature points of the workpiece to be measured, so as to realize the interactive detection of large-scale engineering measurement of laser tracker and total station.
[0074] Through this combined tooling, the same feature point can be collected by a laser tracker and a total station at the same time, and the feature information of the feature points on the surface of the measured object can be obtained through compensation at different heights. During the on-site measurement process, if the on-site conditions do not meet the measurement conditions of the laser tracker or the total station, another measuring device can be used to obtain the feature information of the feature points on the surface of the measured object to complete the measurement.
[0075] Total stations are suitable for collecting benchmark feature points in a large spatial range, while laser trackers are more suitable for collecting feature points with higher local accuracy requirements. Through this combined tooling and measurement method, laser trackers and total stations can be used simultaneously or separately to collect surface feature points of the measured object. It can be widely used in high-precision measurements of spatial position accuracy of industrial equipment and engineering measurements, effectively avoiding the inability to carry out measurement projects or loss of accuracy caused by the inability to see through within one station due to special locations such as deep pits, obstructions, and high places. On the basis of ensuring local detection accuracy, the spatial measurement range of the laser tracker is greatly expanded. The use of this combined tooling improves the accuracy and efficiency of equipment spatial position measurement, reduces measurement workload, reduces measurement costs, and avoids quality risks in measurement operations.
Claims
1. A combined tool for intersection measurement of a laser tracker and a total station, characterized in that: It includes a plane acquisition block, a curved surface acquisition block, a total station acquisition component, a connecting piece and a baffle; The top surface of the planar collection block is provided with a coaxial first step countersunk hole downward, and the diameter of the lower countersunk hole of the first step countersunk hole is smaller than the diameter of the upper countersunk hole. The side surface of the planar collection block is provided with a notch along the height direction, and one side of the notch is flush with the axis of the first step countersunk hole, and the baffle is inserted into the notch; The top surface of the arc surface collection block is provided with a coaxial second stepped countersunk hole downward, and the lower countersunk hole diameter of the second stepped countersunk hole is smaller than the upper countersunk hole diameter; the bottom surface of the arc surface collection block is provided with a dovetail groove, and the dovetail groove is coaxially arranged with the second stepped countersunk hole; The total station acquisition assembly includes a concave frame, a rotating shaft and a measuring light target, wherein a through hole is provided at the bottom center of the concave frame, the rotating shaft is provided at two ends of the top of the concave frame, the measuring light target is provided at the rotating shaft, and the vertical center line of the measuring light target is coaxial with the through hole, and the horizontal center line is coaxial with the rotating shaft; The connecting part includes a center positioning shaft, a support extension shaft and a connecting screw which are coaxially arranged from bottom to top. During detection, the center positioning shaft and the support extension shaft are inserted into the first step countersunk hole of the plane acquisition block or the second step countersunk hole of the arc surface acquisition block according to the measurement object, and the connecting screw is inserted into the bottom through hole of the concave frame of the total station acquisition component and fastened with a nut.
2. The combined tooling for intersection measurement of a laser tracker and a total station according to claim 1, characterized in that: The length of the central positioning axis of the connecting member is less than or equal to the depth of the lower countersink of the first step countersink of the plane collection block and the lower countersink of the second step countersink of the arc surface collection block, and the length of the support extension axis is greater than or equal to the depth of the upper countersink of the first step countersink of the plane collection block and the upper countersink of the second step countersink of the arc surface collection block.
3. The combined tooling for intersection measurement of a laser tracker and a total station according to claim 1 or 2, characterized in that: The side of the baffle plate flush with the axis of the first stepped counterbore of the plane acquisition block is the measuring surface, and the measuring surface of the baffle plate and the measuring surface of the measuring light target of the total station acquisition assembly are respectively covered with optical reflective films.
4. The combined tooling for intersection measurement of a laser tracker and a total station according to claim 3, characterized in that: The diameter of the lower countersink of the first step countersink of the plane collection block and the diameter of the lower countersink of the second step countersink of the arc surface collection block are 15 mm, and the diameter of the upper countersink is 25 mm.
5. The combined tooling for intersection measurement of a laser tracker and a total station according to claim 3, characterized in that: The flatness of the baffle is ≤0.01 mm.