Non-contact equipment object size measurement method, control system and device

Abstract

The invention provides a non-contact equipment object size measurement method, a control system and a device, and the method comprises the steps: obtaining an intersection line of a measured equipment object surface and a measurement reference surface, thereby obtaining the projection distance data of the measured equipment object surface; modulating a laser scale line with a length mark on the basis of the projection distance data in combination with the projection angle, and projecting the laser scale line to the surface of the equipment object; and acquiring image video information of the surface of the equipment object with the laser scale lines. The real curve distance or the linear shortest distance between any two points on the surface of the device object can be directly read through the image video information. Therefore, the length dimension of the surface of the equipment object is measured under the condition that the surface of the equipment object is not contacted, the measurement result is directly projected on the surface of the measured equipment object, and the measurement result can be visually checked through camera shooting or photographing by the camera. Therefore, the measurement of the size of the equipment object is simple, and the measurement efficiency and precision are high.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and in particular relates to a method, a control system and a device for measuring the size of an object using a non-contact device. Background Art

[0002] In daily life and production activities, rulers are often used to measure the size of equipment objects. When using a ruler, first stick the ruler to the surface of the equipment object, and then read the scale on the ruler to obtain key data such as the length, width and height of the object. In corrosion detection, ruler-like tools such as tape measures are often used to measure corrosion defects on the surface of objects in order to quantify the size, area and proportion of these defects. However, the traditional method of using rulers for measurement has certain limitations in practical applications, especially in some complex industrial environments. In industrial sites, especially high-altitude working platforms, inside large storage tanks, etc., there are many difficult-to-reach locations, and workers often cannot get close to the surface of the measured object for accurate measurement. This not only limits the efficiency of the measurement work, but also affects the accuracy of the data. In this case, usually only a rough estimate of the relevant dimensions can be made, resulting in a significant reduction in the reliability of the results.

[0003] Therefore, non-contact measurement has been a hot topic in the industry and academia in recent years. It has the advantages of digitization and intelligence. For some high-risk or difficult-to-reach target objects, non-contact measurement does not require the installation of an external ruler such as a standard frame near them to measure their size. Compared with traditional measurement, it has great advantages. In recent years, non-contact measurement mainly includes: (1) binocular or multi-camera measurement, which uses two or more cameras with known positions to shoot specific points, and then calculates the distance of the image and the size of the image object according to the optical law; (2) laser triangulation, which emits an infrared beam at a certain angle, uses a CCD detector to detect the beam reflected by the object, obtains the beam offset value, and uses the triangular geometric relationship to measure the distance from the laser to the object; (3) digital image correlation method, calibrates the camera at a fixed position, then shoots the image, and calculates the size and deformation of the object through the relationship between pixel spacing and actual size. Binocular measurement has poor accuracy, and secondly, it needs to compare two or three photos of the carrier, which has high hardware requirements. Laser triangulation, the detection of the offset requires the sensitivity and measurement range of the detector, which has high hardware requirements. The digital image correlation method has high accuracy, but requires the shooting point to be fixed and vibration-free, and the camera needs to be strictly calibrated. The algorithm is relatively complex and the hardware requirements are also high. In order to overcome these difficulties, a non-contact device object size measurement method, control system and device need to be designed. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a non-contact equipment object size measurement method, control system and device. The method is simple and easy to implement, can measure the relevant dimensions of the surface of the equipment object without approaching the surface of the equipment object, can accurately and conveniently perform measurement operations, and realize non-contact measurement.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a method for measuring the size of an object using a non-contact device, comprising:

[0006] Obtaining the intersection line between the surface of the object of the measured device and the measurement reference surface, thereby obtaining the projection distance data of the surface of the object of the measured device;

[0007] Based on the projection distance data, a laser ruler line with a length mark is modulated in combination with the projection angle;

[0008] Projecting the laser scale line onto the surface of the device object to be measured;

[0009] The image and video information of the surface of the equipment object with the laser scale line is obtained, and then the size information of the equipment object in the image and video information is obtained.

[0010] In one embodiment of the present invention, the measurement reference plane is a laser radar measurement plane, which is parallel to the transverse center projection plane projecting the laser scale line.

[0011] In one embodiment of the present invention, the length identifier includes a length value of the intersection line within the projection angle or a straight-line distance value between two ends of the intersection line.

[0012] In one embodiment of the present invention, the calculation formula for the length of the intersection line is:

[0013]

[0014] Among them, α is the projection angle, θ is the angular resolution of the laser radar, and r i is the projection distance value of any point on the intersection line within the projection angle range, r i+1 is the intersection line r within the projection angle range i The projected distance value of the adjacent points of a point.

[0015] In one embodiment of the present invention, the calculation formula for the straight-line distance between the two ends of the intersection line is:

[0016]

[0017] Among them, r1 is the projection distance value of the first end on the intersection line within the projection angle, r α / θ It is the projection distance value of the tail end on the intersection line within the projection angle.

[0018] To achieve the above-mentioned purpose and other related purposes, the present invention also provides a non-contact device object size measurement control system, comprising:

[0019] An information acquisition module, wherein the information acquisition module acquires an intersection line between a surface of an equipment object to be measured and a measurement reference surface, thereby obtaining projection distance data of the surface of the equipment object to be measured;

[0020] A projection module, which modulates a laser ruler line with a length mark based on the projection distance data and in combination with a projection angle, and projects the laser ruler line onto the surface of the device object;

[0021] An image module is used to obtain image video information of the surface of the equipment object with the laser scale line, and then obtain the size information of the equipment object in the image video information.

[0022] To achieve the above-mentioned purpose and other related purposes, the present invention also provides a non-contact device object size measuring device, comprising:

[0023] A housing, the housing comprising a mounting portion and a handle, wherein a first end of the mounting portion is mounted on the handle;

[0024] A laser projection unit, wherein a laser beam emission port of the laser projection unit is arranged at the second end of the mounting portion;

[0025] A distance measuring unit, the distance measuring unit is mounted on the mounting portion and connected to the laser projection unit;

[0026] A camera is mounted on the second end of the mounting portion.

[0027] In one embodiment of the present invention, the laser projection unit is a MEMS laser projector, which is used to project a laser ruler line with a length mark on the surface of the device object.

[0028] In one embodiment of the present invention, the distance measuring unit is a single-line laser radar, which is used to measure the projection distance between the surface of the object of the measured device and the laser projection unit.

[0029] In one embodiment of the present invention, a touch screen is further included. The touch screen is arranged on the upper end of the distance measurement unit and is connected to the camera to display the image and video information recorded by the camera.

[0030] The beneficial technical effects of the present invention include at least:

[0031] The present invention discloses a non-contact device object size measurement method, control system and device. The single-line laser radar technology is used to calculate the distance information between the surface of the device object to be measured and the measuring device through the emission and reception of the laser beam, and then obtains the relevant data of the intersection line (the line where the surface of the device object intersects with the laser radar measurement surface), and the data calculation and processing are used for subsequent projection of the corresponding laser ruler line. At the same time, the MEMS laser projection technology is used to obtain the projection distance data through the information acquisition module, and according to the projection angle of the projection module, a laser ruler line with a length mark is modulated and projected onto the surface of the device object to be measured, so that the size of the device object can be measured. The length dimension of the device object surface is measured without contacting the device object surface; and regardless of the undulating and concave-convex state of the device object surface, the measurement method of the present invention can measure the true curve distance and / or the shortest straight line distance between any two points on its surface; and the measurement result is directly projected on the surface of the device object to be measured, and the measurement result can be viewed intuitively by shooting or taking pictures with a camera. The measurement of the device object size is simple, and the efficiency and accuracy of the measurement are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0033] Figure 1 The present invention is a flowchart of a method for measuring the size of an object using a non-contact device in one embodiment.

[0034] Figure 2 The system block diagram of a non-contact device object size measurement control system in one embodiment of the present invention.

[0035] Figure 3 The present invention is a flowchart of a non-contact device object size measurement control system in one embodiment.

[0036] Figure 4 The figure is a schematic structural diagram of a non-contact device object size measuring apparatus in one embodiment of the present invention.

[0037] Figure 5 The figure is a schematic diagram showing the principle of calculating the length of the intersection line within the projection angle in one embodiment of the present invention.

[0038] Figure 6 The figure is a schematic diagram showing the principle of calculating the straight line lengths at both ends of the intersection line within the projection angle in one embodiment of the present invention.

[0039] Figure 7 Schematic diagram of a laser scale line projected in one embodiment of the invention.

[0040] Explanation of reference numerals: 1-laser projection unit; 2-camera; 3-distance measurement unit; 4-touch screen; 5-switch; 6-photo button; 7-projection angle adjustment knob; 8-handle; 10-information acquisition module; 20-projection module; 30-image module. DETAILED DESCRIPTION

[0041] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0042] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] See also Figure 1 To achieve the above-mentioned purpose and other related purposes, the present invention provides a method for measuring the size of an object using a non-contact device, which specifically includes the following steps:

[0044] S1: Obtain the intersection line between the object surface of the measured device and the measurement reference surface, thereby obtaining the projection distance data of the object surface of the measured device;

[0045] S2: Based on the projection distance data and combined with the projection angle, a laser ruler line with length marking is modulated;

[0046] S3: Project the laser ruler line onto the surface of the object to be measured;

[0047] S4: Acquire image video information of the surface of the equipment object with laser scale lines, and then obtain size information of the equipment object in the image video information.

[0048] It should be noted that the above-mentioned non-contact device object size measurement method can realize non-contact method to measure object size by laser projection, and it is also a high-precision measurement, because the laser technology itself has a high measurement accuracy. Furthermore, projecting the laser scale line onto the surface of the object to be measured makes the measurement process more intuitive, which helps the operator understand the measurement results and make subsequent decisions, and can also complete the measurement quickly, improving work efficiency. Obtaining image and video information on the surface of the device object with laser scale lines can realize real-time monitoring and measurement of the object size, which is conducive to rapid feedback in production lines or dynamic environments, and timely adjustment of production or operation processes. Therefore, it not only solves the problem of accurately measuring the surface of the object to be measured that the staff cannot approach. And it improves the accuracy and efficiency of the measurement.

[0049] In one embodiment of the present invention, the measurement reference plane is a laser radar measurement plane, which is parallel to the transverse center projection plane of the projected laser scale line.

[0050] It should be noted that LiDAR measures the distance to an object by emitting a laser beam. If the measurement reference plane is not parallel to the laser scale line, the angle of the laser beam may shift when interacting with the surface of the object, resulting in measurement errors. Maintaining parallelism ensures that the laser beam is perpendicular to the measurement reference plane during the measurement process, thereby improving the accuracy of the measurement. In multiple measurement scenarios, if the measurement reference plane is always parallel to the laser scale line, it can ensure that the same geometric conditions are used for each measurement, thereby improving the consistency of each measurement result. When the measurement reference plane is parallel to the laser projection line, data processing becomes simpler, and the distance information obtained from the LiDAR can be more directly associated with the actual size of the object.

[0051] In one embodiment of the present invention, the length identifier includes a length value of the intersection line within the projection angle or a straight-line distance value between two ends of the intersection line.

[0052] See also Figure 5 As shown, in one embodiment of the present invention, the calculation formula for the length value of the intersection line is:

[0053]

[0054] Among them, α is the projection angle, θ is the angular resolution of the laser radar, and r i is the projection distance value of any point on the intersection line within the projection angle range, r i+1 is the intersection line r within the projection angle range i The projection distance value of the adjacent point.

[0055] See also Figure 6 As shown, in one embodiment of the present invention, the calculation formula for the straight-line distance value at both ends of the intersection line is:

[0056]

[0057] Among them, r1 is the projection distance value of the first end (point) on the intersection line within the projection angle, r α / θ It is the projection distance value of the tail end (point) on the intersection line within the projection angle.

[0058] It should be noted that θ is the angular resolution of the laser radar, which is a device parameter; α is the projection angle, which is adjustable.

[0059] It should be noted that the length of the intersection line within the projection angle is obtained by adding up the lengths between every two adjacent points on the intersection line, and the length between every two adjacent points is obtained by adding up the lengths between the two points. i and r i+1 The length of the straight line between the first and last ends of the projection angle intersection line is calculated by r1 of the first end (point) on the projection angle intersection line and r α / θ And the angle α between the two is calculated, see formula (2). When the surface of the device object being measured is a flat surface, the length L is equal to l; when the surface of the device object is uneven, the length L is greater than the length l.

[0060] See also Figure 7 As shown, a represents the intersection line; b represents the beginning of the intersection line; c represents the end of the intersection line; d represents text information; and e represents the length mark. The style of the laser ruler line can be adjusted according to needs. The projected laser ruler line makes the measurement positioning more accurate and reduces human errors. The laser ruler line can display the measurement results in real time, which is convenient for operators to quickly obtain data and adapt to dynamic measurement needs. The clear laser ruler line makes the measurement results more intuitive, and operators can quickly identify and record data to improve work efficiency. The laser line can effectively adapt to objects of different shapes and surfaces, and can effectively measure on the surface of complex geometries, overcoming the limitations of traditional rulers.

[0061] See also Figure 2 As shown, in order to achieve the above-mentioned purpose and other related purposes, the present invention also provides a non-contact device object size measurement control system, including an information acquisition module 10, a projection module 20 and an image module 30. The information acquisition module 10 acquires the intersection line between the surface of the device object to be measured and the measurement reference surface, thereby obtaining the projection distance data of the surface of the device object to be measured; the projection module 20 modulates a laser ruler line with a length mark based on the projection distance data and the projection angle, and projects the laser ruler line onto the surface of the device object to be measured; the image module 30 acquires the image video information of the surface of the device object with the laser ruler line, and then obtains the size information of the device object in the image video information.

[0062] Please note that, see Figure 4 As shown, the process of acquiring information on the surface of the device object and projecting the laser ruler line is dynamically refreshed. The device object surface information acquired by the information acquisition module 10 is fed back to the projection module 20 in real time, and the projection module 20 processes the data and projects the corresponding laser ruler line and length mark. When the length of the laser ruler line is controlled to change, the measurement mode is switched, or movement occurs, the above process will be repeated to refresh the projected laser ruler line and length mark.

[0063] See also Figure 3 As shown, in order to achieve the above-mentioned purpose and other related purposes, the present invention also provides a non-contact device object size measuring device, including a housing, a laser projection unit 1, a distance measuring unit 3 and a camera 2. The housing includes a mounting portion and a handle 8, wherein the first end of the mounting portion is mounted on the handle 8; the distance measuring unit 3 is mounted on the mounting portion and connected to the laser projection unit 1; and the camera 2 is mounted on the second end of the mounting portion. The laser beam emission port of the laser projection unit 1 is arranged at the second end of the mounting portion, wherein the first end and the second end of the mounting portion are arranged opposite to each other.

[0064] It should be noted that the distances from the laser projection unit 1 and the distance measurement unit 3 to the surface of the device object being measured are the same, so the projection distance measured by the distance measurement unit 3 is the projection distance from the laser projection unit 1 to the surface of the device object. If the distances from the laser projection unit 1 and the distance measurement unit 3 to the surface of the device object being measured are different, the distance data measured by the distance measurement unit 3 needs to be simply converted to obtain the projection distance.

[0065] In one embodiment of the present invention, the laser projection unit 1 is a MEMS laser projector, which is used to project a laser ruler line with a length mark on the surface of the device object.

[0066] It should be noted that MEMS laser projectors use laser technology to generate high-resolution images with excellent image quality. They are compact and portable, suitable for applications in various scenarios. Laser light sources provide a wider range of colors, which can present more vivid and realistic images. High-speed modulation can be achieved to ensure a fast refresh rate of the image, which is suitable for the display of dynamic content.

[0067] In one embodiment of the present invention, the distance measuring unit 3 is a single-line laser radar, which is used to measure the projection distance between the surface of the object of the measured device and the laser projection unit.

[0068] It should be noted that single-line laser radar usually has only one laser transmitting and receiving device, with a relatively simple structure, which is easy to integrate and install. Although there is only one measuring line, within a specific distance range, single-line laser radar usually has higher measurement accuracy. It can quickly obtain distance information and is suitable for real-time applications.

[0069] The measurement plane of the single-line laser radar remains parallel to the lateral center projection plane of the MEMS laser projector.

[0070] In one embodiment of the present invention, a touch screen 4 is also included, which is arranged at the upper end of the distance measuring unit 3 and connected to the camera 2, and is used to display the image and video information recorded by the camera 2. At the same time, corresponding parameter settings can also be performed, such as the color of the laser scale line projected by the laser projection unit 1, the style of the laser scale line, the measurement mode of the measuring device, etc. At the same time, text can also be input and projected onto the surface of the device object.

[0071] It should be noted that the handle 8 is used for hand-holding, and is internally installed with components such as batteries and processing chips to ensure that the device is easy to operate and use. The handle 8 is also provided with a switch 5, a photo button 6 and a projection angle adjustment knob 7. The switch 5 is used to control the power on and off of the measuring device, that is, to turn it on and off. The photo button 6 is used to control the start and stop of the photo and video functions of the camera 2. The projection angle adjustment knob 7 is used to control the projection angle of the projection module 1 of the measuring device, that is, to control the width of the projected laser ruler line. Rotating forward will increase the length of the laser ruler line, and rotating backward will shorten the length of the laser ruler line.

[0072] When it is necessary to measure the surface dimensions of equipment objects on a high working platform, the workers cannot get close to the measured objects, or when it is necessary to measure the surface dimensions of equipment objects inside large storage tanks, there are also many difficult-to-reach locations. A non-contact equipment object dimension measuring device of the present invention has a handle 8 that can be held or fixed by a device clamp, etc., and its dimension distance measuring unit 3 and laser projection unit 1 respectively utilize laser radar technology and laser projection technology, which can achieve the reach of locations that the workers cannot reach or cannot touch, and present the measurement results by shooting or taking pictures with the camera 2, which is not only intuitive but also greatly improves the efficiency of the measurement work and ensures the accuracy of the data.

[0073] In summary, the present invention adopts a non-contact device object size measurement method, control system and device, adopts single-line laser radar technology, and calculates the distance information between the surface of the device object to be measured and the measuring device through the emission and reception of laser beams, and then obtains the relevant data of the intersection line (the line where the surface of the device object intersects with the laser radar measurement surface), and uses the data calculation and processing for subsequent projection of the corresponding laser ruler line. At the same time, MEMS laser projection technology is adopted, and the projection distance data obtained by the information acquisition module is modulated according to the projection angle of the projection module to modulate the laser ruler line with the length mark and project it onto the surface of the device object to be measured, so that the size of the surface of the device object can be measured. It realizes the measurement of the length dimension of the surface of the device object without contacting the surface of the device object; and regardless of the undulating and concave-convex state of the surface of the device object, the measurement method of the present invention can measure the real curve distance and / or the shortest straight line distance between any two points on its surface; and the measurement result is directly projected on the surface of the device object to be measured, and the measurement result can be intuitively viewed by shooting or taking pictures with the camera 2.

[0074] The following technical effects are achieved: the non-contact device object size measurement method, control system and device of the present invention have simple structure and principle, fast and accurate measurement, and can measure the length size of the device object without contacting the surface of the device object; regardless of the undulating and concave-convex state of the device object surface, the true curve distance and the shortest straight line distance between any two points on its surface can be measured; the measurement results are directly projected on the surface of the measured device object, and the measurement results can be viewed intuitively; further, relevant text, date and other information are input, and the text, date and other information are projected onto the surface of the device object, and photos are taken to record, so that the results can be recorded and traced.

[0075] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0076] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0077] References throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be possible in light of the teachings herein and are to be considered part of the spirit and scope of the invention.

[0078] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0079] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0080] As used in the description herein and throughout the claims that follow, "a," "an," and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on," unless otherwise indicated.

[0081] The above description of the illustrated embodiments of the present invention (including the contents described in the Abstract) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and appreciated by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0082] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0083] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A method for measuring the size of an object using a non-contact device, characterized in that: include: Obtaining the intersection line between the surface of the device object being measured and the measurement reference surface, thereby obtaining the projection distance data of the surface of the device object being measured; Based on the projection distance data, a laser ruler line with a length mark is modulated in combination with a projection angle, and the laser ruler line is projected onto the surface of the device object; The image and video information of the surface of the equipment object with the laser scale line is obtained, and then the size information of the equipment object in the image and video information is obtained.

2. The non-contact device object size measurement method according to claim 1, characterized in that: The measurement reference plane is a laser radar measurement plane, which is parallel to the transverse center projection plane projecting the laser scale line.

3. The non-contact device object size measurement method according to claim 2, characterized in that: The length identifier includes a length value of the intersection line within the projection angle or a straight-line distance value between two ends of the intersection line.

4. The non-contact device object size measurement method according to claim 3, characterized in that: The calculation formula for the length of the intersection line is: Among them, α is the projection angle, θ is the angular resolution of the laser radar, and r i is the projection distance value of any point on the intersection line within the projection angle, r i+1 is the intersection line r in the projection angle i The projected distance value of the adjacent points of a point.

5. The non-contact device object size measurement method according to claim 3, characterized in that: The calculation formula of the straight-line distance between the two ends of the intersection line is: Among them, r1 is the projection distance value of the first end of the intersection line within the projection angle, r α / θ It is the projection distance value of the tail end of the intersection line within the projection angle.

6. A non-contact device object size measurement control system, characterized in that: include: An information acquisition module, wherein the information acquisition module acquires an intersection line between a surface of a device object to be measured and a measurement reference surface, thereby obtaining projection distance data of the surface of the device object; A projection module, which modulates a laser ruler line with a length mark based on the projection distance data and in combination with a projection angle, and projects the laser ruler line onto a surface of the device object; An image module is used to obtain image video information of the surface of the equipment object with the laser scale line, and then obtain the size information of the equipment object in the image video information.

7. A non-contact device object size measuring device, characterized in that: include: A housing, the housing comprising a mounting portion and a handle, wherein a first end of the mounting portion is mounted on the handle; A laser projection unit, wherein the laser projection unit is mounted on the mounting portion, and a laser beam emission port thereof is disposed at a second end of the mounting portion; A distance measuring unit, the distance measuring unit is mounted on the mounting portion and connected to the laser projection unit; A camera is mounted on the second end of the mounting portion.

8. The non-contact device object size measuring device according to claim 7, characterized in that: The laser projection unit is a MEMS laser projector, which is used to project a laser ruler line with a length mark on the surface of the device object to be measured.

9. The non-contact device object size measuring device according to claim 8, characterized in that: The distance measuring unit is a single-line laser radar, which is used to measure the projection distance between the device object surface and the laser projection unit.

10. The non-contact device object size measuring device according to claim 9, characterized in that: It also includes a touch screen, which is arranged on the upper end of the distance measuring unit and connected to the camera to display the image and video information recorded by the camera.

Images