阅读说明：本技术 一种圆弧导轨式单相机测量系统及其测量方法 (Arc guide rail type single-camera measuring system and measuring method thereof ) 是由 曾天 邱燕平 陈韦 潘悦 惠怀龙 李韶晶 黄金金 于 2019-10-08 设计创作，主要内容包括：本发明公开了一种圆弧导轨式单相机测量系统,包括圆弧形导轨、摄影测量相机、电机和工装/托架,所述工装/托架上放置待测量产品,所述圆弧形导轨设置在工装/托架顶部,所述摄影测量相机通过电机固定在圆弧形导轨上,所述电机驱动摄影测量相机在圆弧形导轨上运动。本发明还公开了测量方法,包括以下步骤：S1、工装/托架识别码及测量基准建立；S2、产品测量前的准备；S3、运行圆弧导轨式单相机测量系统,建立测量基准,通过系统分析、计算、转换,求得产品上测量点坐标值；将测量值存储并支持多种格式输出。该系统运用摄影测量便捷、高速、高精度特点,设置顶部圆弧形导轨实现一台相机既能满足单一产品测量以及多产品同时测量。(The invention discloses an arc guide rail type single camera measuring system which comprises an arc guide rail, a photogrammetric camera, a motor and a tool/bracket, wherein a product to be measured is placed on the tool/bracket, the arc guide rail is arranged at the top of the tool/bracket, the photogrammetric camera is fixed on the arc guide rail through the motor, and the motor drives the photogrammetric camera to move on the arc guide rail. The invention also discloses a measuring method, which comprises the following steps: s1, establishing a tool/bracket identification code and a measurement reference; s2, preparation before product measurement; s3, operating the arc guide rail type single-camera measuring system, establishing a measuring reference, and obtaining the coordinate value of a measuring point on a product through system analysis, calculation and conversion; the measured value is stored and supports a plurality of format outputs. The system utilizes the characteristics of convenience, high speed and high precision of photogrammetry, and the top arc-shaped guide rail is arranged to realize that one camera can meet the requirements of single-product measurement and multi-product simultaneous measurement.)

1. The utility model provides an arc guide tracked single-camera measurement system, its characterized in that includes convex guide rail, photogrammetry camera, motor and frock/bracket, place the volume of awaiting measuring product on frock/bracket, convex guide rail sets up at frock/bracket top, the photogrammetry camera passes through the motor to be fixed on convex guide rail, motor drive photogrammetry camera moves on convex guide rail to realize diversified, multi-angle measurement.

2. The circular arc guideway single camera measurement system of claim 1, wherein the tooling/carriages are provided on a ground rail or AGV transport.

3. A measuring method adopting an arc guide rail type single-camera measuring system is characterized by comprising the following steps:

s1, establishing a tool/bracket identification code and a measurement reference;

s2 preparation before product measurement

S21, after the product is manufactured, placing the product on a tool or a bracket;

s22, transporting the product to a preparation area, and pasting a product identification code at an obvious position on the product as a unique product identification;

s23, pasting coding points and non-coding points on the product in the measuring area, and waiting for entering a measuring system;

s24, conveying the product to a measuring system;

s3, starting product measurement

S31, operating the arc guide rail type single-camera measuring system;

s32, the single-camera measurement system acquires coordinate values of the coding points on the tool/bracket in the system by identifying the tool/bracket identification code, and establishes a measurement reference;

s33, the single-camera measuring system obtains product information and digital-analog in the system by identifying the product identification code, and the coordinate value of the measuring point on the product is obtained by system analysis, calculation and conversion;

and S34, storing the measured value of the measuring point on the product into the photogrammetric camera, and being capable of supporting output in various formats.

4. The measuring method using the arc rail type single-camera measuring system according to claim 3, wherein the step S1 includes,

s11, establishing a tool/bracket identification code: pasting a tool/bracket identification code at an obvious position of the tool/bracket as the unique identification of the tool/bracket model;

s12, establishing a measurement reference: if the measurement needs to be performed in the absolute coordinate system of the product, a measurement reference needs to be established on the tool/bracket of the product before the measurement.

5. The measuring method using the arc rail type single-camera measuring system according to claim 4, wherein in step S12, the measuring reference is established as follows:

(1) fixing a measuring target at a target point on a product tool/bracket;

(2) pasting coding points on the product tool/bracket;

(3) transporting the product tooling/bracket into a measuring system;

(4) operating the arc guide rail type single-camera measuring system;

(5) the single-camera measurement system acquires the coordinate value of the tool/bracket target point and the digital-analog information in the system by identifying the tool/bracket identification code, obtains the coordinate value of the coding point on the tool/bracket by system analysis, calculation and conversion, and stores the value into the photogrammetric camera as the subsequent measurement reference.

6. The measurement method of claim 3, wherein in step S1, if the measurement is performed by fitting, no measurement reference is needed.

7. The measuring method using the arc guideway single-camera measuring system according to claim 3, wherein the obvious position on the product in the step S2 is a significant position that can be seen by the camera.

8. The measurement method of claim 3, wherein in step S3, the formats include excel, pdf, and html.

Technical Field

The invention relates to the technical field of photogrammetry, in particular to an arc guide rail type single-camera measuring system and a measuring method thereof.

Background

In recent years, photogrammetry is widely developed and applied due to the characteristics of convenience, high efficiency, high precision and the like, but most of photogrammetry is still manual measurement or a measurement system is formed by a plurality of cameras, and manual measurement cannot be carried out on large-size products without the help of lifting equipment due to the limitation of human bodies; the multi-camera measurement system has the characteristics of overhigh investment cost and relatively fixed measurement objects, and the characteristics of high speed of photogrammetry and low system stability requirement are not fully exerted.

Disclosure of Invention

In order to solve the problems, the invention provides the arc guide rail type single-camera measuring system and the measuring method thereof, which meet the requirements of automatic and assembly line type measurement, can realize simultaneous measurement of multiple products in a measuring range, and have the advantages of simple and convenient operation, high measuring speed and high precision.

The technical scheme adopted by the invention is as follows: the utility model provides an arc guide tracked single-phase machine measurement system, includes convex guide rail, photogrammetry camera, motor and frock/bracket, place the volume of awaiting measuring product on frock/bracket, convex guide rail sets up at frock/bracket top to fix on indoor roof, the photogrammetry camera passes through the motor to be fixed on convex guide rail, motor drive photogrammetry camera moves on convex guide rail to realize diversified, the multi-angle is measured. Due to the characteristics of photogrammetry, no special requirements are required for the shooting position, so that no special requirements are required for the installation accuracy of the motor and the guide rail, and the measurement system is simple and efficient to establish.

Further, the tooling/carriages are arranged on a ground rail or an AGV transport vehicle.

The invention also provides a measuring method adopting the arc guide rail type single-camera measuring system, which comprises the following steps:

s1, establishing a tool/bracket identification code and a measurement reference;

s2 preparation before product measurement

S21, after the product is manufactured, placing the product on a tool or a bracket;

s22, transporting the product to a preparation area, and pasting a product identification code at an obvious position on the product as a unique product identification; the product identification code is just like a two-dimensional code on a package, and it should be obvious that product information (including batch and the like) and a digital model can be obtained through the product identification code;

s23, pasting coding points and non-coding points on the product in the measuring area, and waiting for entering a measuring system; the encoding points are points with certain characteristics, and the non-encoding points (measuring points) are generally round points. The principle of photogrammetry is that a plurality of pictures are taken at different angles to a measuring part, and then the pictures are spliced together through a coding point to obtain a measured value of a non-coding point (a measuring point);

s24, conveying the product to a measuring system;

s3, starting product measurement

S31, operating the arc guide rail type single-camera measuring system;

s32, the single-camera measurement system acquires coordinate values of the coding points on the tool/bracket in the system by identifying the tool/bracket identification code, and establishes a measurement reference;

s33, the single-camera measuring system obtains product information and digital-analog (which is theoretical appearance data of the product) in the system by identifying the product identification code, and obtains coordinate values of measuring points on the product by system analysis, calculation and conversion;

and S34, storing the measured value of the measuring point on the product into the photogrammetric camera, and being capable of supporting output in various formats.

Further, the step S1 includes,

s11, establishing a tool/bracket identification code: pasting a tool/bracket identification code at an obvious position of the tool/bracket as the unique identification of the tool/bracket model;

s12, establishing a measurement reference: if the measurement needs to be performed in the absolute coordinate system of the product, a measurement reference needs to be established on the tool/bracket of the product before the measurement.

Further, in step S12, the method for establishing the measurement reference is as follows:

(1) fixing a measuring target at a target point on a product tool/bracket; the selection of the target points is random, but the target points are required to be uniformly distributed on the whole tool/bracket as far as possible, and the number of the target points is not particularly required. The target point is not easy to change after being fixed, and recheck is needed after the target point is changed;

(2) pasting coding points on a product tool/bracket, wherein the coding points are used for splicing photos, the positions of the coding points are not fixed, and each photo is generally required to have at least more than 3 coding points;

(3) transporting the product tooling/bracket into a measuring system;

(4) operating the arc guide rail type single-camera measuring system;

(5) the single-camera measurement system acquires the coordinate value of the tool/bracket target point and the digital-analog information in the system by identifying the tool/bracket identification code, obtains the coordinate value of the coding point on the tool/bracket by system analysis, calculation and conversion, and stores the value into the photogrammetric camera as the subsequent measurement reference.

Further, in step S1, if the measurement is performed in a fitting manner, there is no need to establish a measurement reference.

Further, in the step S2, the obvious position on the product refers to a significant position that can be seen by the camera.

Further, in step S3, the plurality of formats include excel, pdf, and html format.

The invention has the beneficial effects that: 1. the measuring system is simple and efficient to establish, can simultaneously meet the measurement of various products in a measuring range, has no special requirements on materials and sizes of measured objects, and has the advantages of convenient operation, high measuring speed, high precision and low requirement on the stability of the measuring system. 2. The system utilizes the characteristics of convenience, high speed and high precision of photogrammetry, and the top arc-shaped guide rail is arranged to realize that one camera can meet the requirements of single-product measurement and multi-product simultaneous measurement. 3. In the measuring system, the addition of the ground rail or the AGV transport vehicle can also meet the requirement of automatic and production line type rapid measurement.

Drawings

FIG. 1 is a front view of a measurement system of the present invention;

FIG. 2 is a perspective view of a measurement system of the present invention;

FIG. 3 is a top view of the measurement system of the present invention;

fig. 4 is a side view of the measurement system of the present invention.

Detailed Description

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.

The principle of photogrammetry in the invention is that a plurality of photos are spliced into one photo through coding points, and the spliced photo comprises all measuring points (non-coding points) and a standard ruler 11. The standard ruler is also provided with coding points, and the scaling ratio of the picture and the actual is solved according to the position relation of the coding points of the standard ruler in the spliced picture and the actual position relation of each coding point of the standard ruler, so that the data of the measuring points are solved.

As shown in fig. 1 to 4, the invention provides an arc guide rail type single-camera measuring system, which comprises an arc guide rail 1, a photogrammetric camera 2, a motor 3 and a tool/bracket 4, wherein a product 5 to be measured is placed on the tool/bracket, the arc guide rail 1 is arranged at the top of the tool/bracket 4, the photogrammetric camera 2 is fixed on the arc guide rail 1 through the motor 3, and the motor 3 drives the photogrammetric camera 2 to move on the arc guide rail 1, so that multi-azimuth and multi-angle measurement is realized. Due to the characteristics of photogrammetry, no special requirements are required for the shooting position, so that no special requirements are required for the installation accuracy of the motor and the guide rail, and the measurement system is simple and efficient to establish.

The assembly line rapid measurement can be realized by adding a ground rail or an AGV transport vehicle on the basis of the system.

The measuring system is simple in structure and only comprises a photogrammetric camera, a circular arc guide rail and a motor, wherein the photogrammetric camera is installed on the circular arc guide rail through the motor, the guide rail is fixed on the roof of an indoor room, and the circular arc guide rail is utilized to realize multi-azimuth, multi-angle and one-key measurement of the photogrammetric camera. Due to the characteristics of photogrammetry, no special requirements are required for the shooting position, so that no special requirements are required for the installation accuracy of the motor and the guide rail, and the measurement system is simple and efficient to establish.

The tool/bracket identification code and the product identification code are set to realize automatic identification of the tool/bracket and product information, digital analogy and coordinate values of the measuring system, so that the measuring reference of the tool/bracket can be quickly and automatically established, calibrated and stored, single product piece quick measurement, automatic analysis, processing and storage of measured data can be realized, and data traceability can be realized.

The invention also provides a measuring method adopting the arc guide rail type single-camera measuring system, which comprises the following steps:

s1, establishing tool/bracket identification code and measuring reference

S11, establishing a tool/bracket identification code: pasting a tool/bracket identification code at an obvious position of the tool/bracket as the unique identification of the tool/bracket model; the structure of the tool/bracket mainly can meet the appearance measurement of various products, so the tool/bracket is also customized according to different products, and the measurement has no special requirement on the tool/bracket and only plays a role in placement;

s12, establishing a measurement reference:

if the measurement is carried out in a fitting mode, a measurement reference does not need to be established;

if the measurement is required to be carried out under the absolute coordinate system of the product, a measurement reference needs to be established on a tool/bracket of the product before the measurement;

the establishment method of the measurement reference comprises the following steps:

(1) fixing a measuring target 10 at a target point on a product tool/bracket; the selection of the target points is random, but the target points are required to be uniformly distributed on the whole tool/bracket as far as possible, and the number of the target points is not particularly required. The target point is not easy to change after being fixed, and recheck is needed after the target point is changed;

(2) pasting coding points on the product tool/bracket; the coding points are used for splicing the photos, the positions of the coding points are not fixed, and each photo is generally required to have at least more than 3 coding points;

(3) transporting the product tooling/bracket into a measuring system;

(4) operating the arc guide rail type single-camera measuring system;

(5) the single-camera measurement system acquires the coordinate value of the target point of the tool/bracket and the digital-analog information in the system through identifying the tool/bracket identification code 6, and obtains the coordinate value of the coding point on the tool/bracket through system analysis, calculation and conversion (actually, the photogrammetry principle is applied, the splicing of pictures is realized by using an algorithm coding point, and the solution of the measurement point), and the value is stored in the photogrammetry camera to be used as a subsequent measurement reference.

S2 preparation before product measurement

S21, after the product is manufactured, placing the product on a tool or a bracket;

s22, transporting the product to a preparation area, and pasting a product identification code 7 at an obvious position on the product as a unique product identification; the apparent location refers to a significant location that the camera can see, and the product identification code should be apparent as a two-dimensional code on the package. Product information (including batch and the like) and a digital model can be acquired through the product identification code;

s23, pasting a coding point 8 and a non-coding point 9 on the product in the measurement area, and waiting for entering the measurement system; the encoding points are points with certain characteristics, and the non-encoding points (measuring points) are generally round points. The principle of photogrammetry is that a plurality of pictures are taken at different angles to a measuring part, and then the pictures are spliced together through a coding point to obtain a measured value of a non-coding point (a measuring point);

s24, conveying the product to a measuring system;

s3, starting product measurement

S31, operating the arc guide rail type single-camera measuring system;

s32, the single-camera measurement system acquires coordinate values of the coding points on the tool/bracket in the system by identifying the tool/bracket identification code, and establishes a measurement reference;

s33, the single-camera measuring system obtains product information and digital-analog (which is theoretical appearance data of the product) in the system by identifying the product identification code, and obtains coordinate values of measuring points on the product by system analysis, calculation and conversion;

and S34, storing the measured value of the measuring point on the product into the photogrammetric camera, and being capable of supporting output in various formats. The format here is not particularly required, and can be customized according to the needs, for example: excel, pdf, html, etc. The final output is mainly the shape data of the product.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.