CN112648981A - Method for measuring swing quantity of rotating mechanism in motion process based on laser positioning - Google Patents
Method for measuring swing quantity of rotating mechanism in motion process based on laser positioning Download PDFInfo
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- CN112648981A CN112648981A CN202011397415.9A CN202011397415A CN112648981A CN 112648981 A CN112648981 A CN 112648981A CN 202011397415 A CN202011397415 A CN 202011397415A CN 112648981 A CN112648981 A CN 112648981A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention belongs to the technical field of displacement measurement, and relates to a method for measuring the swing quantity of a rotating mechanism in a motion process based on laser positioning; the length scales are marked on the rotating mechanism; a camera is arranged on the rotating mechanism, and the camera is adjusted to focus on the scale; mounting a laser source on the ground or other object that is stationary relative to the ground; a laser source is utilized to emit laser beams, the laser beams are adjusted to be parallel to the rotating surface of the rotating mechanism, and laser marks are formed on the scales; when the rotating mechanism swings, the laser mark swings in the same amount and in the opposite direction relative to the scale, and the swinging amount of the rotating mechanism can be obtained by recording the swinging amount through the camera.
Description
Technical Field
The invention belongs to the technical field of displacement measurement, and relates to a method for measuring swing quantity of a rotating mechanism in a motion process based on laser positioning.
Background
A rotary mechanism is a mechanism whose motion can be broken down into rotary motion and other types of motion during operation.
During its movement, it generally oscillates in the direction normal to the plane of rotation, which oscillation is often detrimental to the mechanism itself. In order to control the swing, the swing amount of the rotating mechanism during the movement process needs to be measured. Generally, the measurement is carried out by adopting a laser displacement sensor and a stay wire displacement sensor.
The prior art has the following defects:
the sensor needs to follow the mechanism synchronously, and a follow-up device is difficult to realize; and the factors of follow-up advance, follow-up lag, follow-up rotation surface deviation and the like all cause larger measurement errors.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the technical problem, a measuring method avoiding adopting a follow-up device is designed.
The technical scheme of the invention is as follows: a method for measuring swing quantity of a rotating mechanism in a motion process based on laser positioning is characterized in that length scales are marked on the rotating mechanism; a camera is arranged on the rotating mechanism, and the camera is adjusted to focus on the scale; mounting a laser source on the ground or other object that is stationary relative to the ground; a laser source is utilized to emit laser beams, the laser beams are adjusted to be parallel to the rotating surface of the rotating mechanism, and laser marks are formed on the scales; when the rotating mechanism swings, the laser mark swings reversely in the same amount relative to the scale, and the swinging amount of the rotating mechanism can be obtained by recording the swinging amount through the camera.
The length scale marks are marked on the surface of the mechanism perpendicular to the rotating surface.
The length scales are along the swing direction of the mechanism.
The length scale range is between 0mm and 100mm, and the precision is better than 1 mm.
The adjusting camera focuses on the scale, and the video picture should cover the full scale range.
The laser beam is a planar radial laser beam.
The laser mark covers the whole process that the length scale rotates along with the mechanism.
The invention has the beneficial effects that:
the measuring device is simple, a follow-up device is not needed, and measuring errors caused by factors such as follow-up advance, follow-up lag, follow-up rotation surface deviation and the like are avoided.
Drawings
FIG. 1 is a schematic diagram of measuring swing amount of a rotating mechanism in a movement process based on laser positioning
FIG. 2 is a schematic diagram of measuring the swing amount of an aircraft canopy during opening and closing based on laser positioning
Wherein: 1-rotating mechanism, 2-length scale, 3-laser mark, 4-camera, 5-laser beam, 6-laser source, 7-ruler, 8-hatch cover, 9-rear hinge, 10-ground, 11-hatch cover table and 12-laser line marking instrument
Detailed Description
As shown in fig. 2, the method is applied to the measurement of the swing amount of the airplane canopy during the opening and closing process, and the swing amount of the center point of the front Edge (EF) during the opening and closing process of the canopy 8 rotating around the rear hinge 9 is measured. The hatch cover 11 and the laser line marker 12 are fixed to the ground by bolts, pressure beams, and the like. The straight edge 7 is glued 502 to the front edge of the hatch in the direction of oscillation. Meanwhile, the camera 4 is fixed at the front edge by using a special tool, and the camera 4 is adjusted to focus on the scale of the ruler 7 and cover the full scale range. The laser striping machine 12 is opened, a plane type radial laser beam 5 is emitted, the laser beam is adjusted to be parallel to the rotating surface of the hatch cover 8, a laser mark 3 is formed in the middle point of the scale of the straight scale 7 (the AB middle point, the CD middle point and the EF middle point are marked in advance, and the laser beam direction is adjusted to pass through the 3 middle points at the same time), and the laser mark 3 can cover the whole process that the scale of the straight scale rotates along with the hatch cover. The hatch cover 8 swings around the rear hinge 9 when the switch is rotated, the laser mark 3 swings in the same amount and in the opposite direction relative to the scale of the straight scale 7, and the swing amount is recorded by the camera 4 and is led out, so that the swing amount of the midpoint of the front edge of the hatch cover 8 can be obtained.
The method for measuring the swing of the hatch cover avoids the problem that a follow-up device needs to be arranged when a laser displacement sensor or a stay wire displacement sensor is used for measuring, and avoids measurement errors caused by factors such as follow-up advance, follow-up lag, follow-up rotation surface deviation and the like.
Claims (7)
1. A method for measuring swing quantity of a rotating mechanism in a motion process based on laser positioning is characterized in that length scales are marked on the rotating mechanism; a camera is arranged on the rotating mechanism, and the camera is adjusted to focus on the scale; mounting a laser source on the ground or other object that is stationary relative to the ground; a laser source is utilized to emit laser beams, the laser beams are adjusted to be parallel to the rotating surface of the rotating mechanism, and laser marks are formed on the scales; when the rotating mechanism swings, the laser mark swings reversely in the same amount relative to the scale, and the swinging amount of the rotating mechanism can be obtained by recording the swinging amount through the camera.
2. The laser positioning-based rotary mechanism motion process oscillation amount measurement method of claim 1, wherein the length scale mark is on a surface of the mechanism perpendicular to the plane of rotation.
3. The laser positioning-based rotary mechanism motion process oscillation amount measurement method of claim 1, wherein the length scale is along a mechanism oscillation direction.
4. The method for measuring the swing quantity of the rotary mechanism based on the laser positioning during the motion process as claimed in claim 1, wherein the length scale range is between 0mm and 100mm, and the precision is better than 1 mm.
5. The method for measuring the amount of pendular motion of a rotating mechanism based on laser positioning as claimed in claim 1, wherein said adjusting camera is focused on the scale, and the video should cover the full scale.
6. The method of claim 1, wherein the laser beam is a planar radial laser beam.
7. The laser positioning-based rotary mechanism motion process swing amount measurement method according to claim 1, wherein the laser mark covers the whole process of the length scale rotating along with the mechanism.
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CN202011397415.9A CN112648981B (en) | 2020-12-04 | 2020-12-04 | Method for measuring swing quantity of rotating mechanism in motion process based on laser positioning |
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CN202011397415.9A CN112648981B (en) | 2020-12-04 | 2020-12-04 | Method for measuring swing quantity of rotating mechanism in motion process based on laser positioning |
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CN112648981A true CN112648981A (en) | 2021-04-13 |
CN112648981B CN112648981B (en) | 2023-01-13 |
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