CN216900266U - Detection device - Google Patents
Detection device Download PDFInfo
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- CN216900266U CN216900266U CN202122817297.9U CN202122817297U CN216900266U CN 216900266 U CN216900266 U CN 216900266U CN 202122817297 U CN202122817297 U CN 202122817297U CN 216900266 U CN216900266 U CN 216900266U
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Abstract
The utility model provides a detection device, comprising: the lens comprises a lens barrel and a half-reflecting and half-transmitting mirror arranged in the lens barrel; the point light source is connected to the outer side wall of the lens cone, is communicated with the lens cone and is used for emitting light rays towards the inside of the lens cone, and the light rays are reflected by the semi-reflecting and semi-transmitting mirror and then are emitted out of the lens cone in parallel; the converging mirror is arranged on the object side of the lens and is used for converging the parallel light rays emitted from the lens to a detection area of a shot object; and the imaging module is connected to the image side of the lens and used for receiving the reflected light of the detection area of the shot object transmitted by the half-reflecting and half-transmitting lens so as to carry out imaging. The detection device converges parallel light rays emitted from the lens to a detection area of a shot object through the converging mirror, the imaging module receives reflected light of the detection area and images the reflected light, and relevant features of the detection area can be shot clearly.
Description
Technical Field
The utility model relates to the technical field of detection, in particular to a detection device.
Background
At present, when a hole structure of a shot object is detected, an annular light source and a camera are generally adopted, the annular light source can illuminate in a mode of mutual reflection of inner walls of holes, and then the camera shoots a hole bottom image of the hole structure. However, when the hole bottom of the hole structure is deep, the camera cannot acquire a clear hole bottom image.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, there is a need to provide a detection device to solve the technical problem that the existing camera cannot acquire a clear hole bottom image.
An embodiment of the present invention provides a detection apparatus, including:
the lens comprises a lens barrel and a half-reflecting and half-transmitting mirror arranged in the lens barrel;
the point light source is connected to the outer side wall of the lens cone, is communicated with the lens cone and is used for emitting light rays towards the inside of the lens cone, and the light rays are reflected by the semi-reflecting and semi-transmitting mirror and then are emitted out of the lens cone in parallel;
the converging mirror is arranged on the object side of the lens and is used for converging the parallel light rays emitted from the lens to a detection area of a shot object; and
and the imaging module is connected to the image side of the lens and used for receiving the reflected light of the detection area of the shot object transmitted by the half-reflecting and half-transmitting lens so as to carry out imaging.
In some embodiments, the converging mirror is a fresnel lens having a central portion through which the reflected light from the detection region of the subject can pass into the lens.
In some embodiments, the lens barrel further includes a front lens group and a rear lens group, the front lens group and the rear lens group are disposed in the lens barrel along an optical axis of the lens barrel from an object side to an image side, and the half-reflective half mirror is disposed between the front lens group and the rear lens group.
In some embodiments, an angle between the half-reflecting and half-transmitting mirror and an optical axis of the lens is 45 degrees.
In some embodiments, the light emitted by the point light source is arranged perpendicular to an optical axis of the lens.
In some embodiments, the imaging module includes a light sensing element for receiving the reflected light of the detection area of the subject transmitted through the half-reflecting and half-transmitting mirror for imaging.
In some embodiments, the point light sources are LEDs.
In some embodiments, the imaging module is a CCD camera.
In some embodiments, the converging mirror is made of plastic or glass.
In some embodiments, the front lens group and the rear lens group are each composed of at least one lens.
The detection device converges parallel light rays emitted from the lens to a detection area of a shot object through the converging mirror, the imaging module receives reflected light of the detection area and images the reflected light, relevant features of the detection area can be clearly shot, and for example, when the detection area is a threaded hole, the hole bottom and the internal thread can be clearly shot.
Drawings
Fig. 1 is a light path structure diagram of a detection apparatus provided in an embodiment of the present invention.
Fig. 2 is a schematic view of the structure of the converging mirror in fig. 1.
Fig. 3 is a partial configuration diagram of the detecting device in fig. 1.
Description of the main elements
Half-reflecting and half-transmitting mirror 14
Converging mirror 30
The center portion 32
Light ray L1
Reflected light L2
Optical axis L3
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
An embodiment of the present invention provides a detection apparatus, including:
the lens comprises a lens barrel and a half-reflecting and half-transmitting lens arranged in the lens barrel;
the point light source is connected to the outer side wall of the lens cone, is communicated with the lens cone and is used for emitting light rays towards the inside of the lens cone, and the light rays are reflected by the semi-reflecting and semi-transmitting mirror and then are emitted out of the lens cone in parallel;
the converging mirror is arranged on the object side of the lens and is used for converging the parallel light rays emitted from the lens to a detection area of a shot object; and
and the imaging module is connected to the image side of the lens and used for receiving the reflected light of the detection area of the shot object transmitted by the half-reflecting and half-transmitting lens so as to carry out imaging.
The detection device converges parallel light rays emitted from the lens to a detection area of a shot object through the converging mirror, the imaging module receives reflected light of the detection area and images the reflected light, relevant features of the detection area can be clearly shot, and for example, when the detection area is a threaded hole, the hole bottom and the internal thread can be clearly shot.
The embodiments of the present application will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a detection apparatus 100, which is applied in the field of optical detection, and can be applied to machine vision for illumination, numerical information collection, observation and classification, and can measure a detection region 210 of a deep object 200 in a very small range by a non-contact measurement method, in which in the embodiment, the detection region 210 is a deep threaded hole, and the detection apparatus 100 can clearly photograph threads on the bottom and the wall of the hole of the object 200, thereby detecting the deep threaded hole.
The detecting device 100 includes a lens 10, a point light source 20, a converging mirror 30 and an imaging module 40.
The lens 10 includes a lens barrel 12 and a half mirror 14 disposed inside the lens barrel 12. The point light source 20 is connected to an outer side wall of the lens barrel 12, and is communicated with the lens barrel 12, and is configured to emit a light L1 into the lens barrel 12, and the light L1 is reflected by the half mirror 14 and then emitted from the lens barrel 12 in parallel. The converging mirror 30 is provided on the object side of the lens 10, and is configured to converge the light ray L1 emitted from the lens 10 to the detection region 210 of the object 200. The imaging module 40 is connected to the image side of the lens 10, and is configured to receive the reflected light L2 of the detection area 210 of the object 200 transmitted through the half mirror 14 for imaging. It is understood that the light L1 emitted in parallel from the lens barrel 12 is parallel to the optical axis of the lens 10.
Note that the object side of the lens 10 is a side of the lens 10 close to the object 200; the image side of the lens 10 is the side of the lens 10 away from the object 200.
The detection process of the detection device 100 is as follows: the point light source 20 emits light L1 toward the inside of the lens barrel 12, the light L1 is reflected by the half-reflecting and half-transmitting mirror 14 and then exits from the lens barrel 12 in parallel, then the converging mirror 30 converges the parallel light L1 exiting from the lens barrel 12 to the detection area 210 of the object 200, the detection area 210 can reflect the incident light L1 into the lens barrel 12 and reach the imaging module 40, and the imaging module 40 performs imaging to detect the detection area 210.
Referring to fig. 2, the converging mirror 30 is a fresnel lens having a central portion 32 and is used for converging a light L1 emitted from the lens 10 to a detection area 210 of the object 200, wherein the light converged by the converging mirror 30 can be located on an optical axis of the lens 10, and a reflected light L2 of the detection area 210 of the object 200 can pass through the central portion 32 and reach the inside of the lens 10. In the present embodiment, the converging mirror 30 is made of plastic or glass. In the present embodiment, the reflected light can reach the lens 10 only through the central portion 32 of the converging mirror 30, and other portions of the converging mirror 30 cannot reach the lens 10, such as a hole, a plane, a cylinder, and the like.
In this way, the reflected emitted light can directly reach the lens 10, and the converging part can be prevented from diverging the reflected light L2, so that the light beam entering the lens 10 is less, and the image definition is affected.
Referring to fig. 3, the lens barrel 10 further includes a front lens group 16 and a rear lens group 18, the front lens group 16 and the rear lens group 18 are disposed in the lens barrel 12 from an object side to an image side along an optical axis L3 of the lens barrel 10, the transflective lens 14 is located between the front lens group 16 and the rear lens group 18, and an included angle between the transflective lens 14 and the optical axis L3 of the lens barrel 10 is 45 degrees.
The front lens group 16 and the rear lens group 18 are composed of at least one lens, and may be one, two or three, but not limited to two. In the present embodiment, the lens 10 is a telecentric lens 10.
The light L1 emitted from the point light source 20 is perpendicular to the optical axis L3 of the lens 10, and in this embodiment, the point light source 20 is disposed above the half mirror. It is understood that in other embodiments, the point light source 20 is disposed below the half mirror. In the present embodiment, the point light sources 20 are LEDs.
The imaging module 40 includes a light sensing element 42, and the light sensing element 42 is used for receiving the reflected light L2 of the detection area 210 of the object 200 transmitted through the half mirror 14 for imaging. In the present embodiment, the imaging module 40 is a CCD camera. The photosensitive element 42 may be a complementary metal oxide semiconductor image sensor or a Charge-coupled device (CCD).
The implementation process of the detection apparatus 100 of the present embodiment is as follows:
the point light source 20 emits a light L1 toward the inside of the lens barrel 12, the light L1 is reflected by the half-reflecting half-mirror 14 and exits in parallel from the lens barrel 12 after passing through the front lens group 16, then the converging lens 30 converges the parallel light L1 exiting from the lens barrel 12 to the detection region 210 of the object 200, the detection region 210 can reflect the incident light L1 to the inside of the lens barrel 12, and reaches the photosensitive element 42 of the imaging module 40 after sequentially passing through the front lens group 16, the half-reflecting half-mirror 14 and the rear lens group 18, and the imaging module 40 performs imaging to detect the detection region 210.
The detection device 100 described above converges the parallel light L1 emitted from the lens 10 to the detection area 210 of the object 200 through the converging mirror 30, and the imaging module 40 receives the reflected light L2 of the detection area 210 and performs imaging, because the light converged by the converging mirror 30 can concentrate the brightness in the detection area 210, thereby achieving the effect of high contrast, better conditions and adaptation are provided for capturing the features, the relevant features of the detection area 210 can be clearly captured, the number of captured image pixels is high, for example, when the detection area 210 is a threaded hole, the hole bottom and the internal thread can be clearly captured. In addition, the detection device 100 has high adaptability to materials, can adapt to threaded holes with different shapes and depths, has good compatibility, can obtain clear images for the deeper threaded hole bottom and the deeper internal thread, and can obtain clear images for various thread appearances, so that an accurate measurement result can be obtained according to the images, and the accuracy of the measurement result is high.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A detection device, comprising:
the lens comprises a lens barrel and a half-reflecting and half-transmitting lens arranged in the lens barrel;
the point light source is connected to the outer side wall of the lens cone, is communicated with the lens cone and is used for emitting light rays towards the inside of the lens cone, and the light rays are reflected by the semi-reflecting and semi-transmitting mirror and then are emitted out of the lens cone in parallel;
the converging mirror is arranged on the object side of the lens and is used for converging the parallel light rays emitted from the lens to a detection area of a shot object; and
and the imaging module is connected to the image side of the lens and used for receiving the reflected light of the detection area of the shot object transmitted by the half-reflecting and half-transmitting lens so as to carry out imaging.
2. The detecting device according to claim 1, wherein the converging lens is a fresnel lens having a central portion through which the reflected light of the detection region of the subject can pass into the lens.
3. The detecting device according to claim 1, wherein the lens further includes a front lens group and a rear lens group, the front lens group and the rear lens group are disposed in the lens barrel from an object side to an image side along an optical axis of the lens, and the semi-reflective and semi-transparent lens is disposed between the front lens group and the rear lens group.
4. The detecting device for detecting the rotation of a motor rotor as claimed in claim 1, wherein an included angle between the half-reflecting and half-transmitting mirror and an optical axis of the lens is 45 degrees.
5. The detecting device for detecting the rotation of a motor rotor as claimed in claim 1, wherein the light rays emitted by the point light source are arranged perpendicular to the optical axis of the lens.
6. The inspection device of claim 1, wherein the imaging module comprises a light sensing element for receiving reflected light of the inspection area of the subject transmitted through the half mirror for imaging.
7. The detection device of claim 1, wherein the point light source is an LED.
8. The inspection device of claim 1, wherein the imaging module is a CCD camera.
9. The detecting device for detecting the rotation of a motor rotor as claimed in claim 2, wherein the material of the converging mirror is plastic or glass.
10. The detecting device for detecting the rotation of a motor rotor as claimed in claim 3, wherein said front lens group and said rear lens group are both composed of at least one lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122817297.9U CN216900266U (en) | 2021-11-17 | 2021-11-17 | Detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122817297.9U CN216900266U (en) | 2021-11-17 | 2021-11-17 | Detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216900266U true CN216900266U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122817297.9U Active CN216900266U (en) | 2021-11-17 | 2021-11-17 | Detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN216900266U (en) |
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2021
- 2021-11-17 CN CN202122817297.9U patent/CN216900266U/en active Active
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