CN212227994U

CN212227994U - Three-dimensional measuring device

Info

Publication number: CN212227994U
Application number: CN202021464615.7U
Authority: CN
Inventors: 王凯; 华磊; 何浩星
Original assignee: Shandong Qingdong Intelligent Technology Co ltd
Current assignee: Shandong Qingdong Intelligent Technology Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-12-25
Anticipated expiration: 2030-07-22

Abstract

The utility model discloses a three-dimensional measuring device relates to three-dimensional measurement technical field. The utility model comprises a laser emitter, a lens, an image processing device and a reflector, wherein the lens is arranged beside the laser emitter and is in communication connection with the image processing device; the reflecting mirror is a dielectric film reflecting mirror, is arranged below the lens and is inclined to the direction of the lens, and the mirror surface of the reflecting mirror faces the lens and the laser emitter. The utility model provides a strong reflection of light problem that directly adorn the camera lens and produce, anti miscellaneous light interference ability is strong, and the formation of image is clear, and it is accurate to measure, and required installation space is little, compact structure.

Description

Three-dimensional measuring device

Technical Field

The utility model relates to a three-dimensional measurement technical field, concretely relates to three-dimensional measuring device.

Background

The three-dimensional measurement mainly adopts a binocular stereo vision sensor consisting of two lenses or one lens and an optical catadioptric system, obtains a plurality of images of an object in the same space from different positions or angles by shooting, can obtain three-dimensional geometric information of the object based on a parallax principle, and reconstructs the three-dimensional shape and position of a surrounding scene.

The three-dimensional measuring device based on a lens and an optical catadioptric system mainly comprises a single lens, image processing equipment and a laser emitter, wherein the laser emitter and the lens are usually arranged above a measured object side by side when the three-dimensional measuring device is used, emergent laser of the laser emitter enters the lens after being reflected by the measured object, the lens acquires an image of the measured object and inputs the image into the image processing equipment for imaging, and a detected image and detected parameters are obtained.

In the use process of the three-dimensional measuring device, if the lens is directly opposite to the measured object for shooting, the reflected light on the surface of the measured object, the arc light generated in working and the like can cause the problem of strong reflection, and the reflection can be mixed with the reflected laser to influence the imaging and measuring results of the detected image. Therefore, in practical application, the lens is required to be obliquely arranged, that is, the orientation of the lens is inclined to the surface of a measured object, the problem of strong light reflection can be effectively solved in the mode, but another problem is brought, that is, the lens is obliquely arranged, the overall size of the position of the lens is large due to the limitation of the inclination angle and the working distance, the occupied installation space is increased, so that the three-dimensional measuring device is not beneficial to installation and use on the one hand, and on the other hand, when the three-dimensional measuring device is matched with other equipment, such as a mechanical arm and the like, the problem that the obstacle is difficult to avoid can occur, and certain difficulty is brought to the practical application of the three-.

In summary, in the three-dimensional measurement apparatus in the prior art, in order to alleviate the problem of strong light reflection of the lens, the lens is mostly arranged in an oblique manner, and the oblique arrangement manner may cause a problem that an installation space required by the position of the lens is large and it is difficult to avoid an obstacle.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model aims to provide a three-dimensional measuring device. The utility model provides a strong reflection of light problem that directly adorn the camera lens and produce, anti miscellaneous light interference ability is strong, and the formation of image is clear, and it is accurate to measure, and required installation space is little, compact structure.

The utility model discloses a three-dimensional measuring device, including laser emitter, camera lens, image processing equipment and speculum, the camera lens sets up the side of laser emitter, the camera lens with image processing equipment communication connection; the reflecting mirror is a dielectric film reflecting mirror, is arranged below the lens and is inclined to the direction of the lens, and the mirror surface of the reflecting mirror faces the lens and the laser emitter.

Preferably, the orientation of the lens is parallel to the laser emitting direction of the laser emitter, and the angle formed by the reflector and the orientation of the lens is 30 degrees.

Preferably, the mirror is a 15 ° dielectric film mirror.

Preferably, a filter is arranged below the lens.

Preferably, the filter is a band-pass filter having a center wavelength of 405 nm.

A three-dimensional measuring device, its advantage lies in:

1. the utility model discloses a set up the dielectric film speculum in the below of camera lens, utilize the characteristic of the specific incident angle light of dielectric film speculum reflection, can effectively reduce the measurement process, the interference of miscellaneous light such as testee surface reflection light, arc light, when having solved the direct-mounted camera lens, the strong reflection of light influences formation of image and measuring problem, makes three-dimensional measuring device also can keep the clear and accurate characteristic of measurement of formation of image when the camera lens is directly mounted, has strengthened the interference killing feature of device. Meanwhile, due to the adoption of the mode of directly mounting the lens, the mounting space required by the lens is greatly reduced, the mounting and the use of the three-dimensional measuring device are more facilitated, the operation and the use difficulty under the complex working environment are reduced, and the practical application and the popularization of the three-dimensional measuring device are more facilitated.

2. The utility model discloses add the light filter in the below of camera lens, can effectively filter other interference light beyond the specific wavelength through the light filter, when the reinforcing means interference killing feature, also improved imaging quality, reduced the subsequent image processing degree of difficulty.

Drawings

Fig. 1 is a schematic structural diagram of a three-dimensional measuring device according to the present invention.

Description of reference numerals: the device comprises a laser emitter 1, a lens 2, an image processing device 3, a reflector 4, a filter 5, a measured object 6, alpha-emergent laser, beta-diffuse reflected light and gamma-reflected light.

Detailed Description

As shown in fig. 1, the three-dimensional measurement apparatus according to this embodiment includes a cabinet, and a lower sidewall of the cabinet is an opening structure so as to facilitate light entering and exiting. The right side in the cabinet is provided with a laser emitter 1, and the emitting end of the laser emitter 1 faces downwards vertically and is used for emitting laser downwards. The left side in the cabinet is provided with a lens 2, and the lens 2 faces vertically downwards. An image processing device 3 is arranged beside the cabinet, the image processing device 3 is in communication connection with the lens 2 through a signal line, and the image processing device 3 is mainly an intelligent terminal with data processing capability, such as a PC or a notebook computer, and is loaded with matched image processing software. The lens 2 obtains image information of the object to be detected 6, the image information is input into the image processing device 3, the image processing device 3 processes the image information through image processing software to form an image, and a clear detection image and detection parameters are obtained and displayed on a display screen.

It should be noted that, a three-dimensional measuring device composed of the laser emitter 1, the lens 2 and the image processing device 3 belongs to the prior art, the laser emitter 1 emits laser light and reflects the laser light into the lens 2 via the object to be measured 6, the lens 2 acquires an image of the object to be measured 6 and transmits the image to the image processing device 3, the image processing device 3 processes the image to be measured 6 and the detection parameters through the matched image processing software, the above process belongs to the prior art, the above image processing process and the imaging process are not improved in this embodiment, and the specific configuration of the image processing device 3 and the model parameters of the lens 2 and the laser emitter 1 can be selected by referring to the three-dimensional measuring device in the prior art.

The reflector 4 is arranged right below the lens 2, the reflector 4 is a dielectric film reflector, also called a broadband dielectric film high reflector, and the reflector can only reflect incident light at a specific incident angle due to the characteristic that the surface of the reflector is plated with a dielectric film, and does not reflect incident light at other incident angles. The reflecting mirror 4 is disposed obliquely to the orientation of the lens 2, and in the present embodiment, the reflecting mirror 4 is disposed obliquely to the vertical direction, and the mirror surface of the reflecting mirror 4 faces the lens 2 and the laser emitter 1.

The practical use process of this embodiment is as follows, as shown in fig. 1, the cabinet is disposed right above the object to be measured 6, and the lens 2 and the laser emitter 1 are oriented vertically downward. The laser transmitter 1, the lens 2, and the image processing apparatus 3 are activated. The outgoing laser α of the laser emitter 1 irradiates the surface of the object to be measured 6, and due to the microscopic rough structure of the surface of the object to be measured 6, the outgoing laser α generates a diffuse reflection phenomenon on the surface of the object to be measured 6, and generates a plurality of diffuse reflection light rays β (only one light ray is drawn in fig. 1 for illustration) which are irregularly reflected along different directions. Part of the diffuse reflection light beta is incident into the reflector 4, and due to the characteristics of the dielectric film reflector, the reflector 4 only reflects the diffuse reflection light beta with a specific incident angle. The reflector 4 reflects diffuse reflection light beta with a specific incident angle to generate reflection light gamma to the lens 2, the lens 2 acquires image information of the object to be measured 6 and transmits the image information to the image processing device 3, the image processing device 3 processes and images the image information to acquire a detection image and detection parameters of the object to be measured 6 and displays the detection image and the detection parameters on the display screen, and the three-dimensional measurement process of the object to be measured is completed.

The utility model discloses a set up the dielectric film speculum in the below of camera lens, utilize the characteristic of the appointed incident angle light of dielectric film speculum reflection, can effectively reduce the measurement process, the interference of miscellaneous light such as 6 surperficial reverberation of testee, arc light has solved and has adorned the camera lens directly, and strong reflection of light influences formation of image and measuring problem, makes three-dimensional measuring device also can keep the clear characteristic accurate with the measurement of formation of image when the camera lens is directly adorned, has strengthened the interference killing feature of device. Meanwhile, due to the adoption of the mode of directly mounting the lens, the mounting space required by the lens is greatly reduced, the mounting and the use of the three-dimensional measuring device are more facilitated, the operation and the use difficulty under the complex working environment are reduced, and the practical application and the popularization of the three-dimensional measuring device are more facilitated.

Further, in the present embodiment, the lens 2 is oriented parallel to the laser emitting direction of the laser emitter 1, and the angle between the mirror 4 and the lens 2 is 30 °. In the actual measurement process, the laser emitter 1 and the lens 2 are generally arranged perpendicular to the surface of the measured object 6, and under the relative position relationship, through multiple actual tests, it is found that when the reflector 4 and the lens 2 incline towards 30 degrees, the obtained detection image is clearer, and the detection parameters are more accurate.

Further, after the laser emitter 1, the lens 2, the object to be measured 6 and the reflector 4 are arranged at the relative positions as described above, through practical tests, a 15-degree dielectric film reflector is selected as the reflector 4, and the dielectric film reflector can only reflect incident light with an incident angle of 15 degrees, and does not reflect incident light with other incident angles. In the actual test process, the 15-degree dielectric film reflector can effectively filter stray light, so that the obtained detection image is clear, and the detection parameters are accurate.

Furthermore, an optical filter 5 is arranged below the lens 2, and other interference light beyond a specific wavelength can be effectively filtered through the optical filter 5, so that the interference resistance of the device is enhanced, the imaging quality is improved, and the subsequent image processing difficulty is reduced.

Further, in the present embodiment, the filter 5 is a band-pass filter, and the center wavelength thereof is 405 nm. The bandpass filter has a characteristic of passing light having a central wavelength, and exhibits a low pass rate or does not pass light having a wavelength other than the central wavelength. Actual tests show that the reflected light with the wavelength of 405nm is beneficial to imaging definition, and the reflected light with the other wavelengths possibly affects the imaging definition, so that a band-pass filter with the central wavelength of 405nm is arranged below the lens 2 to filter stray light with the wavelength of more than 405nm, the imaging quality can be effectively improved, and the subsequent image processing difficulty is reduced.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse explanation, these directional terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present application.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures, and it is to be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. The three-dimensional measuring device is characterized by comprising a laser transmitter, a lens, an image processing device and a reflector, wherein the lens is arranged beside the laser transmitter and is in communication connection with the image processing device; the reflecting mirror is a dielectric film reflecting mirror, is arranged below the lens and is inclined to the direction of the lens, and the mirror surface of the reflecting mirror faces the lens and the laser emitter.

2. The three-dimensional measuring device according to claim 1, wherein the lens is oriented parallel to the laser emitting direction of the laser emitter, and the mirror is oriented at an angle of 30 ° to the orientation of the lens.

3. The three-dimensional measuring device of claim 2, wherein the mirror is a 15 ° dielectric film mirror.

4. The three-dimensional measuring device according to claim 1, wherein a filter is arranged below the lens.

5. The three-dimensional measuring device according to claim 4, wherein the filter is a band-pass filter having a center wavelength of 405 nm.