CN210952726U - Concave scanner - Google Patents

Abstract

The utility model provides a concave scanner, which comprises a shell, wherein the shell comprises a part close to a target and a part far away from the target, and the part close to the target is bent relative to the part far away from the target; the part of the shell close to the target object comprises a concave head part, and the inner side surface of the concave head part is provided with a light inlet; the part of the shell far away from the target object is provided with a handheld part; the shell comprises a light deflection device and an image acquisition device inside; wherein the light deflecting means comprises a plurality of light deflecting elements arranged in an array. Through the design of buckling, can make the scanner stretch into complicated structure, the information acquisition is more complete.

Description

Concave scanner

Technical Field

The utility model relates to an object scanning measures technical field, in particular to utilize the image to carry out geometric dimensions such as target object collection and length and measure technical field.

Background

The present exploration and measurement of the situation of a convex part of an object has great difficulty. The first target object with the bulge usually has not only one bulge, but also other bulges can cause the narrow space around the bulge to be measured, and the conventional laser scanner has a larger volume and cannot enter a smaller space. The three-dimensional appearance of the target object can be obtained by acquisition in the modes of ultrasound, nuclear radiation, electromagnetic waves and the like, but the texture and color characteristics in the cavity cannot be reflected, and the obtained image has a large difference from the image really seen by human eyes. While the traditional visual mode can obtain the texture color information inside the cavity, the traditional visual mode cannot obtain the appearance information. If the above methods are combined to obtain the morphology and texture information at the same time, the system structure will be complex and is not suitable for small space. In addition, some targets have complicated structures and may be blocked, and it is difficult for the conventional straight scanning device to obtain a complete and clear image.

Therefore, the following technical problems are urgently needed to be solved: the three-dimensional morphology and the image texture information of the convex part of the target object can be simultaneously obtained; the method can adapt to complex structure environment; high-efficiency and high-precision acquisition.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been made in order to provide a collecting device that overcomes or at least partially solves the above mentioned problems.

The utility model provides a concave scanner, include

The shell comprises a part close to the target and a part far away from the target, and the part close to the target is bent relative to the part far away from the target;

the part of the shell close to the target object comprises a concave head part, and the inner side surface of the concave head part is provided with a light inlet;

the part of the shell far away from the target object is provided with a handheld part;

the shell comprises a light deflection device and an image acquisition device inside; wherein the light deflecting means comprises a plurality of light deflecting elements arranged in an array.

Optionally, the field of view of at least three light deflecting units have overlapping regions.

Optionally, the light deflecting means is a reflective structure, a transmissive structure and/or a combination thereof.

Optionally, the light deflecting means is a digital micro-mirror array, a liquid crystal array, a micro-lens array, or a grating array.

Optionally, the light source comprises three light inlets respectively located on three inner surfaces of the concave head.

Optionally, each light entrance corresponds to one light deflecting device.

Optionally, the light entrance includes a first beam shaping unit, and a second beam shaping unit is disposed between the light deflecting device and the image collecting unit.

Optionally, the hand-held part and the head part are fixedly connected, detachably connected, slidably connected or integrally formed.

Optionally, the system further comprises a data transmission device.

Optionally, the length of the light inlet on the side surface of the concave head part along the bending direction is 0.5-2 cm; the length along the direction perpendicular to the bending direction is 0.5-3 cm.

Optionally, a light source is arranged inside the concave head.

Invention and technical effects

1. Through the design of buckling, can make the scanner stretch into complicated structure, the information acquisition is more complete.

2. Through the array type light ray bending device, images of a plurality of angles of a target can be obtained, and therefore the morphology and texture information can be obtained simultaneously.

3. The field of view scope through setting up three at least light deflection units has the overlap region, has guaranteed the comprehensive of information collection, has compromise collection efficiency simultaneously.

4. Through the concave design, the convex information of the target object can be acquired, and the convex information is blocked by other bulges or structures, so that the adaptability is stronger.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic external structural diagram of a concave scanner according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a concave scanner according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a concave scanner according to an embodiment of the present invention;

fig. 4 is an acquisition schematic diagram of a concave scanner according to an embodiment of the present invention;

the correspondence of the components in the drawings to the reference numerals is as follows:

the light source comprises a head part, a handheld part, a light inlet part, a light source part, a concave-convex anti-skid structure part, a light deflection device part, an image acquisition device part, a guide groove part and a protruding structure part, wherein the head part is 1, the handheld part is 2, the light inlet part is 3, the light source part is 4, the concave-convex anti-skid structure part is.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In order to solve the above technical problem, an embodiment of the present invention provides a concave scanner capable of scanning and collecting a projection of a target. As shown in fig. 1 to 4, the concave scanner specifically includes: the scanner body comprises a head part 1 and a handheld part 2.

The head 1 is concave for scanning a convex portion of the object. When in use, the concave head part 1 is buckled on the convex part. The concave part comprises a top part and a left side part and a right side part, and the information of the top surface and the two side surfaces of the convex part is respectively collected. The concave top, the left side and the right side are all provided with a light inlet 3. The light entrance 3 may be a hole made of a transparent material or may be an optical system capable of shaping a light beam. Such as a lens assembly, a microlens array, a fresnel refractive system, etc. The length of the light inlet 3 along the bending direction is 0.5-2 cm; the length along the direction vertical to the bending direction is 0.5-3cm, so that the size of the head part 1 is reduced as much as possible on the basis of ensuring the comprehensive information acquisition, and the head part is more favorable for extending into a cavity in a small space.

A plurality of light sources 4 are provided around the light inlet 3. Light source 4 is LED lamp pearl, but also can set up intelligent light source, for example can select different light source luminance, bright and off etc. as required. The light source 4 is used for illuminating the target object and preventing the target object from being too dark to influence the acquisition effect and the accuracy. But at the same time prevent the light source 4 from being too bright, resulting in loss of texture information of the object. The light source 4 may also be arranged at other positions of the head 1, in order to illuminate the part to be scanned.

The hand-held part 2 has a concave-convex anti-slip structure 5 for easy gripping. And also has a switch. The switch can control the on and off of the scanning device. Meanwhile, the handheld part 2 is not limited to be handheld, and can be connected with other mechanical structures to form a complete device.

The head 1 is bent with respect to the hand-held portion 2. The bending angle may be 60 ° or more, for example, 90 °, 120 °, 150 °, or the like. The specific bending angle can be set according to the actual condition in the cavity. For example, the cavity is not linear but has a certain curvature, and the bending angle can be set according to the curvature of the cavity. Especially, if the cavity has a bend, which is difficult to obtain in the conventional case, a body with a certain bending angle may be provided, so that the head 1 can be bent, and the internal information enters the light inlet 3.

Except for fixed connection or integral molding, the head part 1 and the hand-held part 2 are detachably connected, so that different combinations of the head part 1 and the hand-held part 2 can be replaced conveniently. Meanwhile, the hand-held part 2 and the head part 1 can be flexibly connected, so that the hand-held part can be freely bent at different angles. For example, a hinge connection, a rubber structure, a hinge connection, etc. may be used.

In particular, the head part 1 and the handle part 2 can slide relative to each other via the guide groove 8 and the projection structure 9. For example, when scanning teeth, if scanning the teeth below the left side of a patient, the user needs to hold the hand-held part 2 with the head 1 on the left and the hand-held part 2 on the right, and then slide the hand-held part 2 to one side of the head 1, so as to ensure that the hand-held part 2 is inclined to the outer side and prevent the hand-held part 2 from colliding with the oral cavity; if the teeth below the right side of the patient are scanned, the left hand is required to hold the handpiece 2, the head 1 is on the right, and the handpiece 2 is on the left. At this time, the hand-held part 2 is slid to the other side (opposite to the former side) of the head part 1, so that the hand-held part 2 is ensured to be deviated to the outer side, and the hand-held part 2 is prevented from colliding with the oral cavity. Through sliding connection's design for scanner application range is wider, and it is more convenient to use, adapts to different occasions. The two can be connected through the rack in a sliding mode, and the fine adjustment is convenient to fix. In addition, a locking mechanism can be arranged between the head part 1 and the handheld part 2 to ensure the locking after the position adjustment.

The scanner body has a housing with a light deflecting device 6 and an image capturing device 7. Wherein the light deflecting means 6 comprises a plurality of light deflecting elements arranged in an array. The light deflecting means 6 is a reflective structure, a transmissive structure and/or a combination thereof. The light deflecting means 6 is for example a digital micro mirror array, a liquid crystal array, a micro lens array, or a grating array. These arrays are of small size, enabling a significant reduction in the size of the head 1, thereby making it possible for the head 1 to protrude into a cavity of small dimensions. If a conventional multi-camera or camera rotating mode is used, the size is large, and the device is not suitable for a small cavity environment. Different light deflection units in the light deflection device 6 deflect light rays of different angles of the object into different acquisition units in the image acquisition device 7, so that object images of multiple angles are obtained. For the device capable of controlling the deflection direction, the light deflection unit can be controlled to deflect light rays in different directions at different moments, so that more information of a target object is obtained, and high-precision acquisition is facilitated. For the device which can not actively control the deflection direction, the position and the direction of the deflection unit need to be set during setting, so that the images of the target object in different directions can be deflected to different image acquisition units by different deflection units. Especially, in any mode, the view field ranges of at least three light deflecting units in the light deflecting device 6 have overlapping regions, so that the collected information has a certain overlapping degree, and the collection efficiency and precision can be considered. For images in different directions, a conventional three-dimensional synthesis algorithm can be adopted to synthesize a three-dimensional model, so that three-dimensional information of the target object is obtained. Such as an ICP matching algorithm. Of course, the present scanner may also be used only as a two-dimensional image acquisition. Although the light deflecting means 6 is shown as being arranged separate from the light entrance 3, it is understood that the two may be closely connected, even if the light deflecting means 6 is arranged directly on the light entrance 3.

The light inlets 3 on both sides of the concave structure of the head 1 in the housing each have a light deflecting means 6, in particular of the reflective type, for example a digital micromirror array. Each light deflection device 6 transmits the image to the corresponding image acquisition device 7 in the shell, namely, at least two image acquisition devices 7 are arranged in the shell of the head 1 and respectively acquire the images transmitted by the light deflection devices 6 on the left side and the right side. The images here are also a plurality of images of the object at a plurality of angles, as already described above. In the shell, the top surface light inlet 3 of the concave structure of the head 1 can be directly provided with a micro lens array or a Fresnel lens array, and images on the top surface of a target object are collected from different angles and are directly transmitted to the image collection device 7 corresponding to the top surface. Of course, the light entrance 3 of the concave structure of the head 1 may be provided with only a beam shaping structure such as a lens set, and the light deflecting device 6 is provided between the light entrance 3 and the image capturing device 7, similar to the above description.

It is understood that although three image capturing devices 7 are described herein, a plurality of image capturing devices may be provided as required, as long as images in different directions can be clearly and completely captured. It is of course also possible to provide an image recording device 7, the different cell areas of which correspond to different light deflection devices 6. This requires that the resolution of the image acquisition means 7 is sufficiently high.

The image acquisition device 7 can be arranged in the head part 1, the hand-held part 2 or a housing connecting the two. The setting can be carried out according to the actual light path requirement. If both the image acquisition means 7 and the light deflecting means 6 are arranged in the head 1. The head 1 and the hand-held portion 2 may be provided in a detachably connected relationship. But since the head 1 has limited space, modules for data processing, transmission, power supply, etc. may be provided in the hand-held part 2. In this case, the head 1 and the hand 2 are also electrically connected.

In order to obtain a high quality image, optical systems should be provided in the light deflecting device 6 and the image capturing device 7 to shape the light beam and prevent aberrations, distortions, etc. Image correction can be generally performed by using an optical device such as a lens group or a diaphragm.

The shell is internally provided with a data transmission device which is used for sending the image collected by the image collection device 7 to an upper computer, a network or a cloud platform in time. The transmission device may be a wired device, such as an optical port, a network port, a serial port, a USB interface, etc. The interface can be arranged on the hand-held part 2 and is transmitted by solid media such as optical fibers, electric wires, network cables and the like. The transmission device may also be a wireless device such as wifi, cellular, 4G, 5G, bluetooth, etc. The transmission means can now be arranged either in the handpiece 2 or in the head 1 for transmission via a wireless network.

When the scanner is used, the hand-held part 2 can be held by hands, the head part 1 is close to a target object, the concave structure of the head part 1 is buckled on the bulge of the target object, the light inlet 3 is aligned to a part to be collected, the switch is turned on, and images of a plurality of angles in an area to be collected are collected by the scanner. At this time, the head 1 is moved, and images of a plurality of angles of another region are acquired. In some cases, in order to ensure sufficient acquisition information, the head 1 may be repeatedly moved at the portion to be acquired to acquire images for multiple times, thereby ensuring image redundancy.

For a cavity with a complex internal structure, the head part 1 and the hand-held part 2 can be bent at different angles according to requirements before collection.

It is understood that the present invention can be used not only for scanning and collecting the projection, but also for collecting the general target. For example, only one of the three image capturing devices 7 of the present invention may be used.

The target object, and the object all represent objects for which three-dimensional information is to be acquired. The object may be a solid object or a plurality of object components. For example, the body cavity may be oral cavity, teeth, nasal cavity, ear canal, etc., or the body channel may be a rigid channel such as an instrument channel, etc. The three-dimensional information of the target object comprises a three-dimensional image, a three-dimensional point cloud, a three-dimensional grid, a local three-dimensional feature, a three-dimensional size and all parameters with the three-dimensional feature of the target object. The utility model discloses the three-dimensional is that to have XYZ three direction information, especially has degree of depth information, and only two-dimensional plane information has essential difference. It is also fundamentally different from some definitions, which are called three-dimensional, panoramic, holographic, three-dimensional, but actually comprise only two-dimensional information, in particular not depth information.

The collection area of the present invention is the range that the image collection device 7 (e.g., camera) can take. The utility model provides an image acquisition device 7 can be CCD, CMOS, camera, industry camera, monitor, camera, cell-phone, flat board, notebook, mobile terminal, wearable equipment, intelligent glasses, intelligent wrist-watch, intelligent bracelet and have all equipment of image acquisition function.

The three-dimensional information of the multiple regions of the target object obtained in the above embodiment can be used for comparison, for example, for identification of identity. Firstly, the scheme of the utility model is utilized to acquire the three-dimensional information of the human teeth, and the three-dimensional information is stored in the server as standard data. When the device is used, for example, when the device needs to perform identity authentication to perform operations such as payment and door opening, the three-dimensional information of the teeth of the human body can be acquired and acquired again by the three-dimensional acquisition device, the three-dimensional information is compared with the standard data, and if the comparison is successful, the next action is allowed. It can be understood that the comparison can also be used for identifying fixed properties such as antiques, artworks and the like, namely, three-dimensional information of a plurality of areas of the antiques and the artworks is firstly acquired as standard data, and when identification is needed, the three-dimensional information of the plurality of areas is acquired again and compared with the standard data to identify authenticity. The three-dimensional information of the plurality of regions of the target object obtained in the above embodiment can be used for designing, producing and manufacturing a kit for the target object. For example, three-dimensional data of the oral cavity and the teeth of a human body are obtained, and a more proper denture can be designed and manufactured for the human body. The three-dimensional information of the target object obtained in the above embodiments can also be used for measuring the geometric dimension and the outline of the target object.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality according to embodiments of the invention based on some or all of the components in the apparatus of the invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (11)

1. A concave scanner, characterized by: comprises that

The shell comprises a part close to the target and a part far away from the target, and the part close to the target is bent relative to the part far away from the target;

the part of the shell close to the target object comprises a concave head part, and the inner side surface of the concave head part is provided with a light inlet;

the part of the shell far away from the target object is provided with a handheld part;

the shell comprises a light deflection device and an image acquisition device inside; wherein the light deflecting means comprises a plurality of light deflecting elements arranged in an array.

2. The concave scanner of claim 1, wherein: the field ranges of at least three light deflecting units have overlapping regions.

3. The concave scanner of claim 1 or 2, wherein: the light deflecting means is a reflective structure, a transmissive structure and/or a combination thereof.

4. The concave scanner of claim 3, wherein: the light deflecting device is a digital micro-reflector array, a liquid crystal array, a micro-lens array or a grating array.

5. The concave scanner of claim 1 or 2, wherein: comprises three light inlets respectively positioned on three surfaces of the inner side of the concave head.

6. The concave scanner of claim 5, wherein: each light inlet corresponds to one light deflection device.

7. The concave scanner of claim 1 or 2, wherein: the light inlet comprises a first light beam shaping unit, and a second light beam shaping unit is arranged between the light deflection device and the image acquisition unit.

8. The concave scanner of claim 1 or 2, wherein: the hand-held part and the head part are fixedly connected, detachably connected, slidably connected or integrally formed.

9. The concave scanner of claim 1 or 2, wherein: the device also comprises a data transmission device.

10. The concave scanner of claim 1 or 2, wherein: the length of the light inlet on the side surface of the concave head part along the bending direction is 0.5-2 cm; the length along the direction perpendicular to the bending direction is 0.5-3 cm.

11. The concave scanner of claim 1 or 2, wherein: the inner side of the concave head is provided with a light source.

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