CN113532276B - Laser curved surface measuring instrument and measuring method thereof - Google Patents
Laser curved surface measuring instrument and measuring method thereof Download PDFInfo
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- CN113532276B CN113532276B CN202111065773.4A CN202111065773A CN113532276B CN 113532276 B CN113532276 B CN 113532276B CN 202111065773 A CN202111065773 A CN 202111065773A CN 113532276 B CN113532276 B CN 113532276B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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Abstract
The invention relates to a laser curved surface measuring instrument which comprises a dustproof shell, wherein a measuring main body and a driving rotating structure for driving the measuring main body to rotate horizontally are arranged in the dustproof shell; the measurement main body comprises a main body frame fixedly connected with the driving rotating structure and a built-in laser sensor arranged in the main body frame, a supporting plate is fixedly connected in the dustproof shell, a first contact switch and a second contact switch are arranged on the supporting plate, two side ends of the main body frame are in contact with the corresponding first contact switch and the corresponding second contact switch along with the rotation driving of the driving rotating structure, so that the reciprocating rotation limiting of the main body frame and the built-in laser sensor is realized, and the first contact switch and the second contact switch are used for limiting the horizontal rotation stroke of the built-in laser sensor. The invention has the following advantages: the curved surface measurement requirement on the special-shaped workpiece is met, and the measurement precision is greatly improved.
Description
The technical field is as follows:
the invention belongs to the field of curved surface measurement, and particularly relates to a laser curved surface measuring instrument and a measuring method thereof.
Background art:
the laser measurement is a novel technology for measuring distance by taking a laser generator as a light source, and has the characteristics of high precision, high adaptability and the like. In recent years, laser measurement technology has been widely applied to the fields of industrial measurement and control, mines, ports, offshore wind power and the like.
The invention with the reference publication number of CN110887465A discloses a multipurpose laser measuring instrument which is mainly characterized by being used for measuring the horizontal condition of a plane to be measured and the distance between target points, and automatically calculating and adjusting the angle of an optical reflector required to rotate according to the manual input requirement. However, it has certain disadvantages, such as that only a single-point laser measurement function can be realized, and the target plane cannot be scanned by a one-dimensional, two-dimensional or three-dimensional curved surface. The installation position of the laser measuring instrument, the angle of the reflector and the like need to be manually adjusted in certain specific working scenes, and the operation is inconvenient.
The invention with the reference publication number CN110109135A discloses a handheld laser measuring instrument for measuring the assembly accuracy of a railway vehicle bogie. The attachment surface of the measuring instrument is attached to the plane to be measured when the measuring operation is carried out, the measurement difficulty of the assembly precision of the traditional bogie is greatly simplified, the accuracy of the result measured by the measuring instrument is affected by the selection of the attachment surface and the adoption of a manual measurement mode, the scanning of a two-dimensional curved surface can be realized, and the scanning of a three-dimensional curved surface cannot be realized.
The two laser measuring instruments and the current laser measuring instrument have certain limitations in the aspect of curved surface measurement, and three-dimensional curved surface measurement, namely curved surface measurement of the special-shaped workpiece, cannot be realized, so that a laser curved surface measuring instrument needs to be provided urgently to meet the curved surface measurement requirement of the current special-shaped workpiece.
The invention content is as follows:
the invention aims to overcome the defects and provide the laser curved surface measuring instrument and the measuring method thereof, which meet the curved surface measuring requirement of the special-shaped workpiece and greatly improve the measuring precision.
The purpose of the invention is realized by the following technical scheme: a laser curved surface measuring instrument comprises a dustproof shell, wherein a measuring main body and a driving rotating structure for driving the measuring main body to horizontally rotate are arranged in the dustproof shell;
the measurement main body comprises a main body frame fixedly connected with the driving rotating structure and a built-in laser sensor arranged in the main body frame, a supporting plate is also fixedly connected in the dustproof shell, a first contact switch and a second contact switch are arranged on the supporting plate, two side ends of the main body frame are in contact with the corresponding first contact switch and the second contact switch along with the rotation driving of the driving rotating structure, so that the reciprocating rotation limit of the main body frame and the built-in laser sensor is realized, and the first contact switch and the second contact switch are used for limiting the horizontal rotation stroke of the built-in laser sensor;
the main body frame comprises a lower fixing plate fixedly connected with the driving rotating structure and an upper fixing plate arranged right above the lower fixing plate, the built-in laser sensor can be arranged in the cavity in an up-down and up-down adjustable mode, two supporting blocks are arranged between the upper fixing plate and the lower fixing plate and respectively arranged on the left side and the right side of the built-in laser sensor, a first speed reducing motor is fixedly connected onto one supporting block, the driving end of the first speed reducing motor is fixedly connected with one side end of the built-in laser sensor, a transversely arranged connecting shaft is arranged between the other supporting block and the other end of the built-in laser sensor, one end of the connecting shaft is fixedly connected with the built-in laser sensor, the other end of the connecting shaft is rotatably connected with the supporting block through a bearing, the built-in laser sensor is transversely limited between the two supporting blocks, and a limiting component is arranged between the lower end of the built-in laser sensor and the lower fixing plate, the built-in laser sensor is driven by the first speed reducing motor to adjust up and down pitch and realize longitudinal limit under the action of the limit component, the limit component comprises a limit seat arranged on the lower fixing plate and a convex steel ball arranged at the lower end of the built-in laser sensor, the convex steel ball is embedded in the limit seat, a steel ball groove for accommodating the convex steel ball is arranged in the limit seat, the steel ball grooves are distributed in a front-back arc shape, a third contact switch is arranged at one side end in each steel ball groove, a fourth contact switch is arranged at the other side end of each steel ball groove, and the third contact switch and the fourth contact switch are used for limiting the pitch angle stroke of the built-in laser sensor.
The invention is further improved in that: the upper fixing plate and the lower fixing plate are fixedly connected through a plurality of double-end studs, and a cavity for embedding the built-in laser sensor is formed between the upper fixing plate and the lower fixing plate.
The invention is further improved in that: the driving rotating structure comprises a second speed reducing motor arranged in the dustproof shell and a rotary disc connected with the second speed reducing motor, the second speed reducing motor drives the rotary disc to rotate around the axis of the rotary disc, and the rotary disc is fixedly connected with the lower fixing plate.
The invention is further improved in that: the built-in laser sensor comprises a laser transmitting unit, a laser receiving unit and a signal processing unit.
The invention is further improved in that: dustproof housing includes preceding dust cover, back dust cover, goes up shield and lower loading board, and preceding dust cover, back dust cover, last shield and lower loading board are connected and are formed cylindric structure.
The invention is further improved in that: the positions of two sides between the upper dustproof cover and the lower bearing plate are provided with vertically arranged supporting columns, and the joints of the upper dustproof cover, the lower bearing plate and the supporting columns are fixed through bolts.
The invention is further improved in that: the upper dustproof cover and the lower bearing plate are provided with notches for the end parts of the supporting columns to be vertically embedded.
The invention is further improved in that: the front dustproof shell and the rear dustproof shell are respectively arranged between the two support columns and are fixed through bolts to form a columnar structure.
The invention is further improved in that: the edge of one side of the upper dustproof cover and the lower bearing plate, which is close to the support column, is provided with a clamping groove, the extending direction of the clamping groove is consistent with the extending direction of the upper dustproof cover and the lower bearing plate, and the upper end and the lower end of the front dustproof shell and the rear dustproof shell are embedded with the clamping groove.
A measuring method of a laser curved surface measuring instrument comprises the following specific steps:
s1, positioning the laser curved surface measuring instrument, horizontally resetting the built-in laser sensor to the lowest rotation stroke at the moment, setting the pitching angle to be 0 degrees, and setting N target points in the horizontal direction;
s2, at the first target point, the first speed reducing motor is started and drives the built-in laser sensor to perform laser circulation scanning in the pitch angle direction, the spatial information of the first target point in the longitudinal position is measured, and after the measurement of the first target point is finished, the first speed reducing motor is reset to enable the pitch angle of the built-in laser sensor to be 0 degree;
s3, the turntable is driven by the second reducing motor to move to a second target point, the built-in laser sensor performs laser scanning on the horizontal position on the curved surface in the displacement process until the built-in laser sensor is located at the second target point, the second reducing motor stops driving, the first reducing motor starts and drives the built-in laser sensor to perform laser circular scanning in the pitch angle direction, so that the spatial information of the second target point in the longitudinal position is measured, and after the second target point is measured, the first reducing motor resets to enable the pitch angle of the built-in laser sensor to be 0 degree;
and S4, sequentially measuring the subsequent target points until the first N target points in the horizontal direction are measured, driving the turntable to move in a reverse direction by the second speed reducing motor to complete the second N target point measurement, so that the laser circulation scanning of the curved surface in the horizontal direction and the longitudinal direction is realized, the spatial distance between the target point and the built-in laser sensor is measured, and the three-dimensional curved surface information of the target object is obtained by calculating the obtained spatial distance information.
Compared with the prior art, the invention has the following advantages:
1. the invention realizes the automatic rotation scanning measurement function of the laser sensor by combining the built-in laser sensor and the driving rotation structure, limits the rotation angle of the built-in laser sensor by arranging the first contact switch and the second contact switch at the limit positions, measures the space distance between a target point and the built-in laser sensor by a laser circulation scanning mode, and then obtains the curved surface information of the target object by calculating the obtained space distance information.
2. The built-in laser sensor provided by the invention can realize horizontal rotation and up-down pitching swing, and respectively performs horizontal scanning and longitudinal scanning on a plurality of target points of the special-shaped curved surface, so that three-dimensional curved surface information of the special-shaped curved surface is obtained, the curved surface measurement requirement on a special-shaped workpiece is met, and the measurement precision is greatly improved.
3. The lower end of the built-in laser sensor is connected with the lower fixing plate in a sliding mode through a limiting assembly, so that a convex steel ball at the lower end of the built-in laser sensor is limited in a limiting seat of the lower fixing plate, the built-in laser sensor is driven by a first speed reducing motor to slide in the limiting seat, and the pitching adjusting angle of the built-in laser sensor is limited through a third contact switch and a fourth contact switch, most importantly, the convex steel ball is limited in the limiting seat, the built-in laser sensor is prevented from being slightly deviated in the pitching adjusting process to influence the measuring precision, the first speed reducing motor is started and drives the built-in laser sensor to swing upwards and downwards, at the moment, a connecting shaft of the built-in laser sensor is rotatably arranged in a corresponding supporting block through a bearing to achieve axial limiting, and is matched with the limiting assembly to limit the built-in laser sensor to limit, the measurement precision of the built-in laser sensor is further ensured.
4. The dustproof shell with a specially-made structure is adopted, so that the dustproof shell not only realizes good bearing performance on the measuring main body and the driving rotating structure, but also ensures good dustproof effect, protects the built-in laser sensor and effectively isolates external dust and foreign matters.
Description of the drawings:
fig. 1 is a schematic diagram of an internal structure of a first embodiment of a laser curved surface measuring instrument according to the present invention.
Fig. 2 is a schematic external structural diagram of a laser curved surface measuring instrument according to the present invention.
Fig. 3 is a schematic structural diagram of a measurement main body of a first embodiment of a laser curved surface measuring instrument according to the present invention.
Fig. 4 is a schematic diagram of an internal structure of a second embodiment of a laser curved surface measuring instrument according to the present invention.
Fig. 5 is an enlarged schematic view of the position limiting assembly in fig. 4.
Fig. 6 is a sectional view of the structure taken along the line a-a in fig. 5.
Reference numbers in the figures:
1-dustproof shell, 2-measuring main body and 3-driving rotary structure;
11-front dustproof shell, 12-rear dustproof shell, 13-upper dustproof cover, 14-lower bearing plate, 15-support column and 16-notch;
21-a main body frame, 22-a built-in laser sensor, 23-a support plate, 24-a first contact switch, 25-a second contact switch, 26-a support block, 27-a first speed reducing motor, 28-a connecting shaft, 29-a limiting component, 210-a bearing, 211-a lower fixing plate, 212-an upper fixing plate, 213-a stud and 214-a cavity;
221-laser emitting unit, 222-laser receiving unit;
31-second gear motor, 32-turntable.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship, such as one based on the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit indicated must have a specific orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise specified and limited, terms such as "connected," "provided," "having," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or directly connected, and may be connected through an intermediate medium, so that those skilled in the art can understand the basic meaning of the above terms in the present invention according to specific situations.
Fig. 1 to 3 show a first embodiment of a laser curved surface measuring instrument according to the present invention, which includes a dustproof housing 1, wherein the dustproof housing 1 has a measuring body 2 and a driving rotation structure 3 for driving the measuring body 2 to rotate horizontally;
the measurement main body 2 comprises a main body frame 21 fixedly connected with the driving rotating structure 3 and a built-in laser sensor 22 arranged in the main body frame 21, a supporting plate 23 is further fixedly connected in the dustproof shell 1, a first contact switch 24 and a second contact switch 25 are arranged on the supporting plate 23, two side ends of the main body frame 21 are in contact with the corresponding first contact switch 24 and the second contact switch 25 along with the rotation driving of the driving rotating structure 3, so that the reciprocating rotation limit of the main body frame 21 and the built-in laser sensor 22 is realized, and the first contact switch 24 and the second contact switch 25 are used for limiting the horizontal rotation stroke of the built-in laser sensor 22.
The invention realizes the automatic rotation scanning measurement function of the built-in laser sensor 22 by combining the built-in laser sensor 22 with the driving rotation structure 3, limits the rotation angle of the built-in laser sensor 22 by arranging the first contact switch 24 and the second contact switch 25 at the limit positions, measures the space distance between a target point and the built-in laser sensor 22 by a laser circulation scanning mode, and then obtains the curved surface information of the target object by calculating the obtained space distance information.
Further, the main body frame 21 includes a lower fixing plate 211 fixedly connected to the driving rotation structure 3 and an upper fixing plate 212 disposed directly above the lower fixing plate 211, the upper fixing plate 212 and the lower fixing plate 211 are fixedly connected by a plurality of studs 213, and a cavity 214 is formed between the upper fixing plate 212 and the lower fixing plate 211 for accommodating the built-in laser sensor 22.
Referring to fig. 4, which shows a second embodiment of the laser curved surface measuring instrument according to the present invention, the built-in laser sensor 22 is adjustably disposed in the cavity 214.
Further, two supporting blocks 26 are arranged between the upper fixing plate 212 and the lower fixing plate 211, the two supporting blocks 26 are respectively arranged on the left side and the right side of the built-in laser sensor 22, a first speed reducing motor 27 is fixedly connected to one supporting block 26, the driving end of the first speed reducing motor 27 is fixedly connected with one side end of the built-in laser sensor 22, a transversely arranged connecting shaft 28 is arranged between the other supporting block 26 and the other end of the built-in laser sensor 22, one end of the connecting shaft 28 is fixedly connected with the built-in laser sensor 22, the other end of the connecting shaft 28 is rotatably connected with the supporting block 26 through a bearing 210, and the built-in laser sensor 22 is transversely limited between the two supporting blocks 26.
Furthermore, a limit component 29 is arranged between the lower end of the built-in laser sensor 22 and the lower fixing plate 211, and the built-in laser sensor 22 is driven by the first speed reducing motor 27 to adjust up and down and realize longitudinal limit under the action of the limit component 29.
The built-in laser sensor 22 can rotate in the horizontal direction and swing up and down and pitch, and respectively scans a plurality of target points of the special-shaped curved surface in the horizontal direction and the longitudinal direction, so that three-dimensional curved surface information of the special-shaped curved surface is obtained, the curved surface measurement requirement of a special-shaped workpiece is met, and the measurement precision is greatly improved.
Further, as shown in fig. 5 and 6, the limiting component 29 includes a limiting seat 291 disposed on the lower fixing plate 211 and a protruding steel ball 292 disposed at the lower end of the built-in laser sensor 22, the protruding steel ball 292 is embedded in the limiting seat 291, and a steel ball groove 293 for accommodating the protruding steel ball 292 is disposed in the limiting seat 291.
Further, the steel ball grooves 293 are arranged in a front-rear arc shape.
Further, a third contact switch 294 is provided at one side end of the steel ball groove 293, a fourth contact switch 295 is provided at the other side end of the steel ball groove 293, and the third contact switch 294 and the fourth contact switch 295 are used for limiting the pitch angle stroke of the built-in laser sensor 22.
The lower end of the built-in laser sensor 22 is slidably connected with the lower fixing plate 211 through a limiting component 29, so that the protruding steel ball 292 at the lower end of the built-in laser sensor 22 is limited in a limiting seat 291 of the lower fixing plate 211, the built-in laser sensor 22 is driven by the first speed reducing motor 27 to slide in the limiting seat 291, and the pitching adjustment angle of the built-in laser sensor 22 is limited through the third contact switch 294 and the fourth contact switch 295, most importantly, the protruding steel ball 292 is limited in the limiting seat 291 to avoid the influence of small deviation of the built-in laser sensor 22 in the pitching adjustment process on the measurement accuracy, the first speed reducing motor 27 is started to drive the built-in laser sensor 22 to swing upwards and downwards, and at the moment, the connecting shaft 28 of the built-in laser sensor 22 is rotatably arranged in the corresponding supporting block 26 through the bearing 210 to realize axial limiting, and the limit component 29 is matched with the built-in laser sensor 22 for limiting, so that the measurement precision of the built-in laser sensor 22 is further ensured.
Further, the driving rotation structure 3 includes a second speed reduction motor 31 disposed in the dust-proof housing 1 and a turntable 32 connected to the second speed reduction motor 31, the second speed reduction motor 31 drives the turntable 32 to rotate around its axis, and the turntable 32 is fixedly connected to the lower fixing plate 211.
Further, the built-in laser sensor 22 includes a laser emitting unit 221, a laser receiving unit 222, and a signal processing unit.
Further, the dust-proof housing 1 includes a front dust-proof housing 11, a rear dust-proof housing 12, an upper dust-proof cover 13 and a lower bearing plate 14, and the front dust-proof housing 11, the rear dust-proof housing 12, the upper dust-proof cover 13 and the lower bearing plate 14 are connected to form a cylindrical structure.
Further, both sides position all has the support column 15 of vertical setting between upper dustproof cover 13 and the lower bearing board 14, and upper dustproof cover 13, lower bearing board 14 pass through the bolt fastening with support column 15 junction.
Further, the upper dust cover 13 and the lower carrier plate 14 are provided with notches 16 into which the ends of the supporting posts 15 are vertically inserted.
Further, the front dust-proof housing 11 and the rear dust-proof housing 12 are respectively disposed between the two support columns 15 and fixed by bolts to form a columnar structure.
Furthermore, a clamping groove is formed in the edges of one side, close to the supporting column 15, of the upper dustproof cover 13 and the lower bearing plate 14, the extending direction of the clamping groove is consistent with the extending direction of the upper dustproof cover 13 and the extending direction of the lower bearing plate 14, and the upper end and the lower end of the front dustproof shell 11 and the upper end and the lower end of the rear dustproof shell 12 are embedded in the clamping groove.
The invention adopts the dustproof shell 1 with a specially-made structure, thereby not only realizing good bearing performance of the measuring main body 2 and the driving rotating structure 3, but also ensuring good dustproof effect, protecting the built-in laser sensor 22 and effectively isolating external dust and foreign matters.
A measuring method of a laser curved surface measuring instrument comprises the following specific steps:
s1, positioning the laser curved surface measuring instrument, horizontally resetting the built-in laser sensor 22 to the lowest rotation stroke at the moment, setting the pitching angle to be 0 degrees, and setting N target points in the horizontal direction;
s2, at the first target point, the first speed reducing motor 27 starts and drives the built-in laser sensor 22 to perform laser circulation scanning in the pitch angle direction, the spatial information of the first target point in the longitudinal position is measured, and after the measurement of the first target point is finished, the first speed reducing motor 27 is reset to enable the pitch angle of the built-in laser sensor 22 to be 0 degree;
s3, the second speed reducing motor 31 drives the turntable to move to a second target point, the built-in laser sensor 22 performs laser scanning on the horizontal position on the curved surface in the displacement process, the second speed reducing motor 31 stops driving until the built-in laser sensor is located at the second target point, the first speed reducing motor 27 starts and drives the built-in laser sensor 22 to perform laser circulation scanning in the pitch angle direction, so that the spatial information of the second target point in the longitudinal position is measured, and after the measurement of the second target point is finished, the first speed reducing motor 27 resets to enable the pitch angle of the built-in laser sensor 22 to be 0 degree;
and S4, sequentially measuring the subsequent target points until the first N target points in the horizontal direction are measured, driving the turntable 32 to move reversely by the second speed reducing motor 31 to complete the second N target point measurement, so that the laser circular scanning of the horizontal direction and the longitudinal direction of the curved surface is realized, the spatial distance between the target point and the built-in laser sensor 22 is measured, and the three-dimensional curved surface information of the target object is obtained by calculating the obtained spatial distance information.
According to the invention, the special-shaped curved surface is measured by the laser curved surface measuring instrument, the curved surface scanning in the longitudinal direction is realized by the pitch adjustment at each target point, and the built-in laser sensor 22 realizes the curved surface scanning in the transverse direction of each target point along with the rotation of the second speed reducing motor 31, so that the three-dimensional curved surface information of the special-shaped curved surface is obtained.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A laser curved surface measuring instrument is characterized in that: the device comprises a dustproof shell, wherein a measuring main body and a driving and rotating structure for driving the measuring main body to horizontally rotate are arranged in the dustproof shell;
the measurement main body comprises a main body frame fixedly connected with the driving rotating structure and a built-in laser sensor arranged in the main body frame, a supporting plate is further fixedly connected in the dustproof shell, a first contact switch and a second contact switch are arranged on the supporting plate, two side ends of the main body frame are in contact with the corresponding first contact switch and the second contact switch along with the rotation driving of the driving rotating structure, so that the reciprocating rotation limiting of the main body frame and the built-in laser sensor is realized, and the first contact switch and the second contact switch are used for limiting the horizontal rotation stroke of the built-in laser sensor;
the main body frame comprises a lower fixed plate fixedly connected with the driving rotating structure and an upper fixed plate arranged right above the lower fixed plate, the built-in laser sensor can be arranged in the cavity in a way of adjusting up and down, two supporting blocks are arranged between the upper fixing plate and the lower fixing plate, the two supporting blocks are respectively arranged at the left side and the right side of the built-in laser sensor, a first speed reducing motor is fixedly connected to one supporting block, the driving end of the first speed reducing motor is fixedly connected with one side end of the built-in laser sensor, a connecting shaft arranged transversely is arranged between the other supporting block and the other end of the built-in laser sensor, one end of the connecting shaft is fixedly connected with the built-in laser sensor, the other end of the connecting shaft is rotatably connected with the supporting block through a bearing, and the built-in laser sensor realizes transverse limiting between the two supporting blocks; a limiting component is arranged between the lower end of the built-in laser sensor and the lower fixing plate, the built-in laser sensor is driven by the first speed reducing motor to adjust up and down and pitch, and longitudinal limiting is realized under the action of the limiting component; the limiting assembly comprises a limiting seat arranged on the lower fixing plate and a convex steel ball arranged at the lower end of the built-in laser sensor, the convex steel ball is embedded in the limiting seat, a steel ball groove for accommodating the convex steel ball is formed in the limiting seat, the steel ball groove is distributed in a front-back arc shape, a third contact switch is arranged at one side end in the steel ball groove, a fourth contact switch is arranged at the other side end of the steel ball groove, and the third contact switch and the fourth contact switch are used for limiting the pitch angle stroke of the built-in laser sensor.
2. The laser curved surface measuring instrument according to claim 1, wherein: the upper fixing plate and the lower fixing plate are fixedly connected through a plurality of double-end studs, and a cavity for embedding the built-in laser sensor is formed between the upper fixing plate and the lower fixing plate.
3. The laser curved surface measuring instrument according to claim 1, wherein: the drive revolution mechanic is including arranging the second gear motor in the dust cover and the carousel of being connected with second gear motor in, second gear motor drive carousel carries out rotary motion around its axle center, carousel and bottom plate fixed connection.
4. The laser curved surface measuring instrument according to claim 3, wherein: the built-in laser sensor comprises a laser transmitting unit, a laser receiving unit and a signal processing unit.
5. The laser curved surface measuring instrument according to claim 4, wherein: dustproof housing includes preceding dust cover, back dust cover, goes up shield and lower loading board, preceding dust cover, back dust cover, go up shield and lower loading board are connected and are formed cylindric structure.
6. The laser curved surface measuring instrument according to claim 5, wherein: the upper dustproof cover and the lower bearing plate are provided with support columns which are vertically arranged at two sides, and the joints of the upper dustproof cover, the lower bearing plate and the support columns are fixed through bolts.
7. The laser curved surface measuring instrument according to claim 6, wherein: the upper dustproof cover and the lower bearing plate are provided with notches which are used for accommodating the end parts of the supporting columns to be vertically embedded.
8. The laser curved surface measuring instrument according to claim 7, wherein: and the front dustproof shell and the rear dustproof shell are respectively arranged between the two support columns and are fixed by bolts to form a columnar structure.
9. The laser curved surface measuring instrument according to claim 8, wherein: the upper dustproof cover and the lower bearing plate are provided with clamping grooves at the edges of one sides, close to the supporting columns, of the lower bearing plate, the extending directions of the clamping grooves are consistent with those of the upper dustproof cover and the lower bearing plate, and the upper end and the lower end of the front dustproof shell and the lower end of the rear dustproof shell are embedded with the clamping grooves.
10. A measuring method using the laser curved surface measuring instrument according to any one of claims 3 to 9, characterized in that: the method comprises the following specific steps:
s1, positioning the laser curved surface measuring instrument, horizontally resetting the built-in laser sensor to the lowest rotation stroke at the moment, setting the pitching angle to be 0 degrees, and setting N target points in the horizontal direction;
s2, at the first target point, the first speed reducing motor is started and drives the built-in laser sensor to perform laser circulation scanning in the pitch angle direction, the spatial information of the first target point in the longitudinal position is measured, and after the measurement of the first target point is finished, the first speed reducing motor is reset to enable the pitch angle of the built-in laser sensor to be 0 degree;
s3, the turntable is driven by the second reducing motor to move to a second target point, the built-in laser sensor performs laser scanning on the horizontal position on the curved surface in the displacement process until the built-in laser sensor is located at the second target point, the second reducing motor stops driving, the first reducing motor starts and drives the built-in laser sensor to perform laser circular scanning in the pitch angle direction, so that the spatial information of the second target point in the longitudinal position is measured, and after the second target point is measured, the first reducing motor resets to enable the pitch angle of the built-in laser sensor to be 0 degree;
and S4, sequentially measuring the subsequent target points until the first N target points in the horizontal direction are measured, driving the turntable to move in a reverse direction by the second speed reducing motor to complete the second N target point measurement, so that the laser circulation scanning of the curved surface in the horizontal direction and the longitudinal direction is realized, the spatial distance between the target point and the built-in laser sensor is measured, and the three-dimensional curved surface information of the target object is obtained by calculating the obtained spatial distance information.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53110553A (en) * | 1977-03-08 | 1978-09-27 | Sony Corp | Measurement apparatus of gradients of curved faces |
| CN102735182A (en) * | 2011-04-15 | 2012-10-17 | 顾建达 | Method and device for scanning inner contour of buildings by using handheld rangefinder |
| CN206573079U (en) * | 2016-11-25 | 2017-10-20 | 广西我的科技有限公司 | A kind of interior space lifts modeling scan device |
| CN106653469B (en) * | 2017-01-17 | 2017-08-29 | 国网山东省电力公司乳山市供电公司 | A kind of contacts for vacuum-break switches disjunction detection method |
| CN210664367U (en) * | 2019-09-23 | 2020-06-02 | 无锡先导智能装备股份有限公司 | Curved surface screen detection device |
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