CN210603224U - Ultra-precise line laser corner sensor - Google Patents
Ultra-precise line laser corner sensor Download PDFInfo
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- CN210603224U CN210603224U CN201921740475.9U CN201921740475U CN210603224U CN 210603224 U CN210603224 U CN 210603224U CN 201921740475 U CN201921740475 U CN 201921740475U CN 210603224 U CN210603224 U CN 210603224U
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Abstract
The utility model discloses an ultra-precision line laser corner sensor. The ultra-precise line laser corner sensor comprises a line laser emitting component, a regular prism staggered laminated laser reflecting component, a line laser reflecting light spot receiving component and a control processor, wherein the line laser emitting component and the line laser reflecting light spot receiving component are respectively connected with the control processor; the utility model discloses utilize the crisscross stromatolite of the positive prism of 2 coaxial lines to constitute the crisscross stromatolite laser reflection part of positive prism to install on the measured object rather than synchronous revolution, utilize the line laser through the positive prism axis as the light source, the spot position that makes finally throw on line laser reflection facula receiving element takes place great change when the measured object is rotatory, realizes being detected the amplification on the online laser reflection facula receiving element of thing rotation angle volume; under the condition that the resolution ratio of the on-line laser reflection light spot receiving component is certain, the ultrahigh precision measurement of the rotation angle of the detected object can be realized.
Description
Technical Field
The utility model belongs to the technical field of the optical detection, in particular to ultra-precision line laser corner sensor.
Background
The angle measurement is an important component of the measurement science, and particularly, the measurement of the tiny angle has extremely important significance and effect in many fields such as precision machining, aerospace, military, communication and the like. At present, angle measurement is mainly developed from contact measurement to optical measurement. At present, a two-dimensional laser sensor is available, the product can measure the dihedral angle of a workpiece, the dihedral angle of the workpiece is obtained by measuring the surface type of the workpiece by using the two-dimensional laser sensor, and in addition, the cost for measuring by using a spectrophotometer, a Fizeau interferometer or a Tyman Green interferometer is too high, the time spent on measuring one workpiece is longer, and the precision is low.
In the existing laser corner sensor, the mapping geometric relationship multiple increment of the corner amount and the light receiving position amount on the photosensitive element in the detection process is low, namely the light receiving position variation is small relative to the amplification factor of the corner amount of the laser reflection device; under the condition that the resolution of the photosensitive element is fixed, the minimum detection value of the rotation angle is limited by the multiple increment with lower mapping geometric relation, and the cost is high. Therefore, when ultra-high precision detection is required for the micro-angle, the existing method is difficult to meet the application requirements.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of above-mentioned prior art, the utility model provides an ultra-precision line laser corner sensor for during solving current laser corner and detecting, it is difficult to realize carrying out the problem that super high accuracy detected to small angle of rotation volume.
The utility model provides an ultra-precision line laser corner sensor for realizing above-mentioned purpose, a characterized in that, ultra-precision line laser corner sensor includes line laser emission part (1), positive prism crisscross stromatolite laser reflection part (2), line laser reflection facula receiving element (3), control processor (4);
the line laser emitting component (1) is installed through the axis of the regular prism staggered laminated laser reflecting component (2) in the line laser emitting direction and is used for emitting line laser to be projected onto the regular prism staggered laminated laser reflecting component;
the regular prism staggered laminated laser reflection component (2) is formed by 2 axes which are collinear and are staggered with each other at an angle of
The device comprises regular prisms with the same degree, wherein n is the number of edges of the regular prisms, and the regular prisms are used for projecting the reflected linear laser to a linear laser reflection light spot receiving component;
the line laser reflection light spot receiving component (3) is arranged perpendicular to the line laser emission direction, has a vertical distance R with the installation position of the center O of the regular prism staggered laminated laser reflection component (2), and is used for detecting the line laser light spots reflected by the regular prism staggered laminated laser reflection component;
and the control processor (4) is respectively connected with the line laser emitting component (1) and the line laser reflection light spot receiving component (3) and is used for calculating and obtaining the rotation angle value of the detected object.
Further, the controller (4) comprises a line laser control module (41), an information processing module (42), a data calculation module (43) and an output interface module (44);
further, the function of the regular prism staggered laminated laser reflection component (2) is as follows: when the ultra-precision line laser corner sensor measures a corner, firstly, the corner is measured by using light spots reflected by the regular prism positioned at the bottom, when an object to be measured rotates for a certain angle and incident light irradiates the edge of the regular prism positioned at the bottom, the incident light is vertical to the side surface of the regular prism positioned at the top, the corner is continuously measured by using the light spots reflected by the regular prism positioned at the top, and the measurement of the large angles of multiple circumferences is completed in a circulating reciprocating manner;
further, the line laser reflection spot receiving section (3) functions to: the distance from the laser reflection light spot of the same regular prism line to the incident light path is the same when the detection object deflects at the same angle left and right relative to the incident light path;
further, the function of the controller (4) is: when the ultra-precise line laser corner sensor is used for measuring angles, the line laser control module (41) controls the line laser emitting component (1) to emit line laser, the information processing module (42) converts spot position signals received by the line laser reflection spot receiving component (3) into digital signals which can be identified by a computer, the data calculating module (43) calculates the converted digital signals, the measured object corner amount is calculated according to the spot displacement amount, and the output interface module (44) outputs and displays the measured object corner amount.
Further, the line laser receiving point p10When the laser reflecting component (2) is in the initial position, the line laser receives the point on the laser receiving device (3)(ii) a The line laser receiving point p11After the regular prism staggered laminated laser reflection component (2) rotates for a certain angle, the line laser receives points on the laser receiving device (3).
The utility model has the advantages that: the utility model discloses an utilize 2 the same, positive prisms of coaxial are crisscross each other
The laser reflection part rotates synchronously with the detected object, and the position of a laser spot finally projected onto the line laser reflection spot receiving part is greatly changed by utilizing the change of the incident angle of the same line laser on the regular prism staggered laminated laser reflection part, so that the amplification of the rotation angle of the detected object on the line laser reflection spot receiving part is realized; under the condition that the resolution ratio of the on-line laser reflection light spot receiving component is certain, the ultrahigh-precision measurement of the rotation angle of the detected object can be realized.
Drawings
Fig. 1 is a schematic diagram of the principle of an ultra-precise line laser rotation angle sensor, in fig. 1, a 2-regular prism staggered laminated laser reflection component is an initial position and an end position of the same regular prism, a second regular prism is not shown, and the detailed structure of the component is shown in fig. 2.
The system comprises a laser emitting component 1, a laser reflecting component 2, a laser reflecting component with a regular prism staggered and laminated layer, a laser reflecting spot receiving component 3, a control processor 4, a laser control module 41, an information processing module 42, a data calculating module 43 and an output interface module 44.
Fig. 2 is a detailed structure diagram of a regular prism staggered laminated laser reflection component.
In the figure, 2 identical coaxial regular prisms are staggered with each other
The degree stack forms a regular prism staggered stack laser reflection component, wherein n is the number of the side faces of the regular prism.
FIG. 3 is a view of the regular position of the bottom regular prism or the top regular prism of the laser reflection component with the staggered and laminated regular prisms.
Detailed Description
In order to make the technical solution of the present invention more clear, the present invention is further explained with reference to the accompanying drawings.
As shown in FIG. 1, the ultra-precise line laser rotation angle sensor comprises a line laser emitting component (1), a regular prism staggered laminated laser reflecting component (2), a line laser reflection light spot receiving component (3) and a control processor (4). Preferably, the line laser emitting component (1) is a line laser emitting tube with high parallelism; the regular prism staggered laminated laser reflection part (2) is formed by staggered lamination of 2 mirror reflection elements with the long side length of the side edge of the regular prism being D; the line laser reflection light spot receiving component (3) is a CCD (charge coupled device) or a PSD (photoelectric position sensor) and is connected with the control processor (4). The control processor (4) comprises a line laser control module (41), an information processing module (42), a data calculation module (43) and an output interface module (44); the line laser control module (41) is mainly used for controlling starting and stopping of the line laser emitting component (1), the information processing module (42) is mainly used for collecting and processing light receiving position information of the line laser reflection light spot receiving component (3) to obtain a position value of a laser light spot on the line laser reflection light spot receiving component (3), the data calculating module (43) is mainly used for calculating a turning angle value of a detected object according to light receiving position variation on the line laser reflection light spot receiving component (3), and the output interface module (44) is mainly used for achieving an external output function of detecting turning angle data by a sensor.
Preferably, in a calibration mode, the middle point of the bottom side of the regular prism staggered and laminated laser reflection component (2) is used as a calibration point, the reflection point of the line laser on the regular prism staggered and laminated laser reflection component (2) is the middle point of the bottom surface, and the laser projection point on the line laser reflection spot receiving component (3) is p20Processing a record p by the information processing module (42)20The position of the point is used as a calibration point of the ultra-precise line laser corner sensor; the midpoint of the bottom surface of the bottom regular prism is only a preferred calibration point, and the bottom regular prism can be selectedAnd calibrating other positions on the prism staggered laminated laser reflection component (2). The line laser emitting component (1) is installed through the axis of the regular prism staggered laminated laser reflecting component (2) in the line laser emitting direction;
the regular prism staggered laminated laser reflection component (2) is formed by 2 axes which are collinear and are staggered with each other at an angle of
The regular prisms are identical in degree, wherein n is the number of the side faces of the regular prisms, and D is the side length of the regular prisms;
the line laser reflection light spot receiving component (3) is arranged perpendicular to the line laser emission direction, and the vertical distance from the central O installation position of the regular prism staggered laminated laser reflection component (2) is R;
the controller (4) is respectively connected with the line laser emitting component (1) and the line laser reflection light spot receiving component (3).
In the actual detection process, after the detected object generates a rotation angle delta theta, the data calculation module (43) receives a point p on the line laser reflection light spot receiving component (3)10And p11The positions are respectively calculated and the light source emitting position p20Distance L of1,L2The line laser emitting component (1) takes the position which passes through the axis of the regular prism staggered and laminated laser reflecting component (2) and the laser emitting direction of which is vertical to any side surface of a regular prism in the regular prism staggered and laminated laser reflecting component (2) as a positive position, and L is1,L2The angle of rotation delta theta, L of the regular prism staggered laminated laser reflection component (2) is obtained by calculation1,L2The geometric relational expression solved for the values of θ 1, θ 2 and Δ θ is:
Δθ＝θ2-θ1
n is the number of the side faces of the regular prisms, theta 1 and theta 2 are angles of the regular prisms deviating from the regular positions at the moment, a formula of theta relative to L can be fitted through a mathematical method, theta 1 and theta 2 at any positions are obtained through solution, and then the rotation angle of the laser reflection device, namely the rotation angle theta 2-theta 1 of the measured object, namely delta theta is obtained;
the line laser reflection spot receiving component (3) is provided with a range of receiving points, the detected object rotates by a certain angle, when the line laser beam is projected to the edge of the regular prism staggered laminated laser reflection component (2), the information processing module (42) of the line laser reflection spot receiving component (3) detects that the reflection spot is positioned at the edge of the receiving range, at the moment, the line laser of the line laser emission component (1) irradiates another regular prism, and the regular prism staggered laminated laser reflection component (2) is composed of 2 collinear axes and mutually staggered angles
The regular prisms are identical in angle, so that the linear laser of the linear laser emitting component (1) irradiates the regular position of the other regular prism at the moment, the angle is continuously measured, and the rotation angle measurement in a multi-circumference large-angle range can be completed by circulating reciprocating.
The data calculation module (43) calculates and obtains a rotation angle value delta theta of the detected object (4) according to the geometric relation, and finally the output interface module (44) outputs the rotation angle value delta theta.
When the ultra-precise line laser corner sensor is used for continuously measuring the corner, the component parameters R, D and the number n of the side faces of the regular prisms can be optimized according to the detection precision so as to meet the requirements of different detection environments.
The utility model discloses an implement the principle: due to the reflection of the regular prism side, the incident angle of the laser beam with the same direction and different projection points is greatly changed. As shown in FIG. 1, the projection point p on the regular prism staggered laminated laser reflection part (2)10And p11The incidence angles are theta 1 and theta 2 respectively; the variation of the incident angle causes a large variation in the direction of the reflected line laser, which is ultimately reflected in said line laserThe light receiving position on the light reflection light spot receiving part (3) is greatly changed; the angle change delta theta of the detected object corresponds to a distance value of the line laser reflection light spot receiving component (3) amplified by a larger magnification; and under the condition that the resolution ratio of the line laser reflection light spot receiving component (3) is fixed, the ultrahigh precision detection of the tiny angle of rotation of the detected object is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. If these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also includes these modifications and variations.
Claims (3)
1. An ultra-precise line laser corner sensor is characterized by comprising a line laser emitting component (1), a regular prism staggered laminated laser reflecting component (2), a line laser reflecting light spot receiving component (3) and a control processor (4);
the line laser emitting component (1) is installed through the axis of the regular prism staggered laminated laser reflecting component (2) in the line laser emitting direction and is used for emitting line laser to be projected onto the regular prism staggered laminated laser reflecting component (2);
the regular prism staggered laminated laser reflection component (2) consists of 2 coaxial mutually staggered laser reflection components
The regular prisms with the same degree are laminated, wherein n is the number of the side faces of the regular prisms, and the regular prisms are used for reflecting the linear laser and then projecting the linear laser to the linear laser reflection light spot receiving part (3);
the line laser reflection light spot receiving component (3) is arranged perpendicular to the line laser emission direction, and the vertical distance from the central O installation position of the regular prism staggered laminated laser reflection component (2) is R; the laser scanning device is used for detecting linear laser spots reflected by the regular prism staggered laminated laser reflecting component (2);
and the control processor (4) is respectively connected with the line laser emitting component (1) and the line laser reflection light spot receiving component (3) and is used for calculating and obtaining the rotation angle value of the detected object.
2. The ultra-precise line laser rotation angle sensor according to claim 1, wherein the control processor (4) includes a line laser control module (41), an information processing module (42), a data calculation module (43), and an output interface module (44); the laser control module (41) is used for controlling the line laser emitted by the line laser emitting component (1); the information processing module (42) is used for processing the detection signal of the line laser spot according to the line laser reflection spot receiving part (3) to obtain the light receiving position of the line laser spot on the line laser reflection spot receiving part (3); the data calculation module (43) is used for calculating the rotation angle value of the detected object; the output interface module (44) is used for detecting rotation angle data of the external output sensor.
3. The ultra-precise line laser rotation angle sensor according to claim 2, wherein the line laser receiving point p10When the regular prism staggered lamination laser reflection component (2) is at the initial position, the line laser is at the receiving point on the line laser reflection light spot receiving component (3); the line laser receiving point p11After the regular prism staggered laminated laser reflection component (2) rotates for a certain angle, the line laser is received on a receiving point of the line laser reflection facula receiving component (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921740475.9U CN210603224U (en) | 2019-10-17 | 2019-10-17 | Ultra-precise line laser corner sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921740475.9U CN210603224U (en) | 2019-10-17 | 2019-10-17 | Ultra-precise line laser corner sensor |
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| CN210603224U true CN210603224U (en) | 2020-05-22 |
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| CN201921740475.9U Expired - Fee Related CN210603224U (en) | 2019-10-17 | 2019-10-17 | Ultra-precise line laser corner sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763162A (en) * | 2019-10-17 | 2020-02-07 | 四川大学 | Ultra-precise line laser corner sensing method |
| CN114111580A (en) * | 2021-12-02 | 2022-03-01 | 华侨大学 | Monocular vision-based automatic measurement system and measurement method |
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2019
- 2019-10-17 CN CN201921740475.9U patent/CN210603224U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763162A (en) * | 2019-10-17 | 2020-02-07 | 四川大学 | Ultra-precise line laser corner sensing method |
| CN110763162B (en) * | 2019-10-17 | 2024-04-02 | 四川大学 | Ultra-precise line laser corner sensing method |
| CN114111580A (en) * | 2021-12-02 | 2022-03-01 | 华侨大学 | Monocular vision-based automatic measurement system and measurement method |
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Granted publication date: 20200522 Termination date: 20201017 |