CN213208913U

CN213208913U - Three-laser combined measuring head

Info

Publication number: CN213208913U
Application number: CN202022612185.5U
Authority: CN
Inventors: 刘新波; 杨永青; 黎浪
Original assignee: Shaoyang University
Current assignee: Shaoyang University
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-05-14
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a three laser combination gauge heads, including frame subassembly, first laser beam measurement and timing subassembly, second laser beam measurement and timing subassembly, third laser beam measurement and timing subassembly and next machine system. The rack assembly mainly comprises a top cover with a shaft, an upper fixing frame, a middle adjusting frame, a lower fixing frame, a central column, a bottom mounting disc and a top cover fixing screw group, wherein the top cover with the shaft can be connected with other rotating equipment; the first laser beam measuring and adjusting component, the second laser beam measuring and adjusting component and the third laser beam measuring and adjusting component have the same structure, and can respectively realize the pose adjustment and fixation of the first laser beam, the second laser beam and the third laser beam; and the lower computer system is responsible for acquiring three groups of measurement data in real time, and processing and transmitting the three groups of measurement data. The utility model discloses can both gather space three point's data at the arbitrary moment, when carrying out the space scanning measurement, can reduce the influence of various errors, improve measurement accuracy to have advantages such as non-contact, easily integration.

Description

Three-laser combined measuring head

Technical Field

The utility model belongs to the technical field of laser non-contact geometry precision measurement, especially, relate to a three laser combination gauge heads.

Background

The point laser sensor manufactured based on the laser triangulation method has the characteristics of simple structure and convenience in use, the self precision can reach or even break through the micron level and reach the submicron level, and the point laser sensor is an ideal measuring tool for improving the manufacturing quality and efficiency. At present, the sensor is mostly carried out in a scanning mode, which inevitably introduces motion errors of scanning action, such as radial run-out during rotation, straightness errors during linear feeding and the like. These errors may be larger than the manufacturing errors of the precision parts themselves, and therefore, the range of use of the triangulation laser sensor is limited.

In the aspect of manufacturing a multi-laser displacement sensor combined measuring head, a rotationally symmetric laser triangular sensor is developed by the subject group of high-order teaching of fertilizer industry university, the encountered surface step and discontinuous texture can be overcome during scanning, and the influence of vibration in the laser emergent direction on the measuring result is reduced, so that the limitation of the mode is that the motion error of the whole measured surface is not reduced; CN2013102463836 discloses a laser measuring device and a calibration mechanism thereof, wherein two opposite laser displacement sensors are installed, and the laser correlation measuring mode has the measuring advantages of an outside micrometer, and is suitable for measuring occasions where a measuring head is static, but cannot be adapted to measuring head scanning occasions. CN2018102599415 discloses a double-range composite laser probe device and a surface measurement method thereof, which can ensure that the detection precision of a laser triangular sensor is not affected when the range of a laser probe is enlarged, but do not consider the influence of a motion error on a measurement result; CN20171444160264 discloses a method for synchronously detecting multiple laser probes, which can solve the problem of calibrating multiple laser displacement sensors arranged in the same direction, but in this case, the multiple sensors are not used for the same measurement element, so that the influence of motion error still exists during scanning measurement.

In summary, most of the currently developed laser alignment heads have little or no consideration for the scanning motion error, and if a scanning measurement operation is performed, the detection result will be affected, and the measurement accuracy will be reduced, thereby limiting the popularization and application of the laser displacement sensor.

SUMMERY OF THE UTILITY MODEL

For overcoming the not enough of above-mentioned technique, the utility model aims at providing a three laser combination gauge heads, the device have convenient operation, easily with the rotating equipment integration to can reduce the influence that the rotating equipment motion error caused.

The utility model provides a technical scheme as follows: a three-laser combined measuring head comprises a rack assembly 100; a first laser beam measurement and tuning assembly 200; a second laser beam measuring and tuning assembly 300; a third laser beam measurement and calibration assembly 400 and a lower computer system.

The rack assembly is the base to which all other components are attached, including the top cover with shaft 101; an upper mount 102; a middle adjusting bracket 103; a lower fixing frame 104; a central column 105; a bottom mounting plate 106; a top cover fixing screw group 10; an upper mount 102; the middle of the middle adjusting frame 103 and the lower fixing frame 104 are provided with central holes which are in interference fit with the central column 105; the top cover 101 with shaft can be connected with other rotating equipment, namely, the whole measuring head is driven to rotate by the top cover fixing screw group 107.

The first laser beam measuring and adjusting assembly 200, the second laser beam measuring and adjusting assembly 300 and the third laser beam measuring and adjusting assembly 400 have the same structure, respectively realize the pose adjustment and fixation of the first laser beam 601, the second laser beam 602 and the third laser beam 603, and are uniformly arranged on the rack assembly at 120 degrees.

The first laser beam measuring and adjusting assembly 200 includes a small gimbal 201, a threaded rod 202, a top sleeve 203, a sensor mounting plate 204, a first laser displacement sensor 205, a first lower set screw group 206, a first middle return spring 207, a first middle adjusting screw 208, a first upper set screw group 209, a second upper set screw group 210, a second middle adjusting screw 211, a second middle return spring 212, a sensor fixing screw group 213, and a second lower set screw group 214. The first laser displacement sensor 205 is mounted on the sensor mounting plate 204 by a sensor fixing screw group 213, so that the sensor mounting plate 204 becomes a carrier subject to adjustment and fixation.

During initial installation, the first laser beam 601, the second laser beam 602 and the third laser beam 603 cannot be ensured to be on the same plane and intersect at the same point, and the first middle return spring 207, the first middle adjusting screw 208, the second middle adjusting screw 211 and the second middle return spring 212 need to be used for spatial two-axis rotation to adjust the posture of the laser beams; and the position of the laser beam is adjusted by the translation in the vertical direction of the threaded mandril 202 and the mandril 203. After adjustment, fixation can be performed by the first lower set screw 206, the first upper set screw 209, the second upper set screw 210, and the second lower set screw 214, so that the attitude state of the laser beam after adjustment is always kept unchanged.

The lower computer system is responsible for collecting three paths of measurement data in real time, processing and transmitting the data, and mainly comprises a single chip microcomputer control board 501, a control board mounting seat 502, a data antenna 503, an antenna mounting seat 504, a lithium battery 505 and a battery mounting seat 506.

Further, the top cover 101 with shaft can be connected with other rotating devices, and the whole measuring head is driven to rotate by the top cover fixing screw group 107.

Further, the upper fixing frame 102, the middle adjusting frame 103 and the lower fixing frame 104 are all three-fork shaped structures, and the three-fork shaped structures need to be aligned when being installed.

Further, the central column 105 has a regular hexagonal convex structure at the middle portion thereof, so that the adjustment of the vertical method is performed by using a wrench.

The beneficial effects of the utility model include: when the static measurement is carried out on the circular hole type part, three points on the surface of the circular hole can be measured by three beams of laser simultaneously, and the diameter of the circular hole can be obtained in theory once; when dynamic scanning measurement is carried out on the round hole type part, the influence of a jumping error during scanning can be eliminated theoretically, and the measurement precision is improved. The utility model discloses the small and exquisite compactness of structure is convenient for install, is fit for measuring at the machine to big-and-middle-sized hole system part.

Drawings

FIG. 1 is a schematic diagram of a three-laser combined probe;

FIG. 2 is a schematic view of a housing component;

FIG. 3 is a partial view (right, front) of a single laser sensor assembly;

fig. 4 is a partial view (left and rear directions) of a single laser sensor assembly.

In the figure: 100. the laser beam measuring and adjusting device comprises a machine frame assembly 200, a first laser beam measuring and adjusting assembly 300, a second laser beam measuring and adjusting assembly 400, a third laser beam measuring and adjusting assembly 101, a top cover with a shaft, 102, an upper fixing frame 103, a middle adjusting frame 104, a lower fixing frame 105, a central column 105, a bottom mounting plate 106, a top cover fixing screw group 107, a top cover fixing screw group 201, a small universal joint 202, a threaded top rod 203, a top sleeve 204, a sensor mounting plate 205, a first laser displacement sensor 206, a first lower fastening screw group 207, a first middle return spring 208, a first middle adjusting screw 209, a first upper fastening screw group 210, a second upper fastening screw group 211, a second middle adjusting screw 212, a second middle return spring 213, a sensor fixing screw group 214, a second lower fastening screw group 501, a control plate mounting base, a control plate, a control, 502. The laser processing system comprises a single chip microcomputer control board, 503, a data antenna, 504, an antenna mounting seat, 505, a lithium battery, 506, a battery mounting seat, 601, a first laser beam, 602, a second laser beam, 603 and a third laser beam.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention.

Referring to fig. 1 to 4, a three-laser combined probe includes a frame assembly 100; a first laser beam measurement and tuning assembly 200; a second laser beam measuring and tuning assembly 300; a third laser beam measurement and calibration assembly 400 and a lower computer system.

And the lower computer system is responsible for acquiring the measurement data of the three sensors in real time, and can perform simple processing and wirelessly transmit the data to the upper-level processing system so as to perform further processing and display. The lower computer system mainly comprises a singlechip control board 501, a control board mounting seat 502, a data antenna 503, an antenna mounting seat 504, a lithium battery 505 and a battery mounting seat 506.

As the preferred mode of the present invention, the top cover 101 with shaft can be connected to other rotating devices, and the whole measuring head is driven to rotate by the top cover fixing screw set 107.

As a preferred mode of the present invention, the upper fixing frame 102, the middle adjusting frame 103 and the lower fixing frame 104 are all three-fork shaped structures, and the three-fork shaped structures need to be aligned when being installed.

As a preferred mode of the present invention, the middle portion of the central column 105 is a regular hexagonal convex structure so as to perform adjustment of the vertical method by using a wrench.

As a preferred mode of the present invention, the control board mounting base 502, the antenna mounting base 504, and the battery mounting base 506 are uniformly fixed on the bottom mounting plate 106 at 120 degrees.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. A three-laser combined measuring head comprises a rack assembly (100); a first laser beam measurement and tuning assembly (200); a second laser beam measuring and tuning assembly (300); a third laser beam measurement and calibration assembly (400) and a lower computer system;

the rack assembly (100) comprises a top cover (101) with a shaft; an upper mount (102); a middle adjusting bracket (103); a lower fixing frame (104); a central column (105); a bottom mounting plate (106); a top cover fixing screw group (107);

the first laser beam measuring and adjusting assembly (200), the second laser beam measuring and adjusting assembly (300) and the third laser beam measuring and adjusting assembly (400) have the same structure, and can respectively realize the pose adjustment and fixation of a first laser beam (601), a second laser beam (602) and a third laser beam (603); the first laser beam measuring and adjusting assembly (200) comprises a small universal joint (201), a threaded ejector rod (202), an ejector sleeve (203), a sensor mounting plate (204), a first laser displacement sensor (205), a first lower fastening screw group (206), a first middle reset spring (207), a first middle adjusting screw (208), a first upper fastening screw group (209) and a second upper fastening screw group (210); a second middle adjusting screw (211), a second middle return spring (212), a sensor fixing screw group (213), and a second lower fastening screw group (214);

the lower computer system is responsible for collecting three groups of measurement data in real time, processing and transmitting the data, and mainly comprises a single chip microcomputer control board (501), a control board mounting seat (502), a data antenna (503), an antenna mounting seat (504), a lithium battery (505) and a battery mounting seat (506).

2. A three-laser combined measuring head according to claim 1, characterized in that the top cover (101) with shaft can be connected with other rotating equipment, and the whole measuring head is driven to rotate by the top cover fixing screw group (107).

3. A three-laser combined measuring head according to claim 1, characterized in that the upper fixing frame (102), the middle adjusting frame (103) and the lower fixing frame (104) are all three-fork shaped structures.