Glass invisible two-dimensional code recognition device

Abstract

The utility model provides a glass invisible two-dimensional code recognition device, which comprises a fixing module, a light source module and a recognition module, the fixing module, the light source module and the recognition module are sequentially arranged from bottom to top, the fixing module comprises a glass placing jig, and the light source module comprises a coaxial light source and a conical cover. The conical cover is arranged at the end, close to the glass placing jig, of the coaxial light source, and the conical cover light inlet and outlet is formed in the middle of the end, away from the coaxial light source, of the conical cover, so that light sources are conveniently converged, obvious light spots are formed in target positions, and the illumination intensity is improved; the conical cover opening is formed in the side wall of one side of the conical cover, so that correlation light can be reduced, the two-dimensional code imaging contrast ratio is enhanced, and the recognition success rate of the glass invisible two-dimensional code is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to machine vision technical field especially relates to a glass invisible two-dimensional code recognition device. BACKGROUND

[0002] At present, glass invisible two-dimensional code is mainly applied in product quality control and production tracking. Since the shape of glass invisible two-dimensional code is small (0.2mm*0.2mm) and is mostly in the glass, when using the recognition device to recognize glass invisible two-dimensional code, the recognition success rate is often very low. CONTENT OF UTILITY MODEL

[0003] In view of the low recognition success rate when using the recognition device to recognize glass invisible two-dimensional code in the prior art, the utility model provides a glass invisible two-dimensional code recognition device.

[0004] The utility model discloses a glass invisible two-dimensional code recognition device, including fixed module, light source module and identification module, fixed module, light source module and identification module are from below to above sequentially arranged, the fixed module includes glass placement fixture, the light source module includes coaxial light source and conical cover, the conical cover sets up at the one end of coaxial light source near glass placement fixture, is equipped with conical cover inlet and outlet light port in the middle of the one end of conical cover away from coaxial light source, is equipped with conical cover opening on the side wall of conical cover, and the conical cover opening communicates with conical cover inlet and outlet light port, the identification module includes camera and telecentric lens, and telecentric lens sets up at the one end of camera near coaxial light source, and the optical axis of telecentric lens, the central axis of coaxial light source, the central axis of conical cover are on the same straight line.

[0005] Preferably, the coaxial light source includes a coaxial light source body and a plurality of light sources, the plurality of light sources are evenly arranged in the coaxial light source body at positions corresponding to the conical cover opening.

[0006] Further, the coaxial light source body includes a light source containing rack and a light source fixing rack, the light source containing rack is provided with a coaxial containing groove in the middle of the end away from the conical cover, the middle of the groove bottom surface of the coaxial containing groove is provided with a coaxial light hole, the coaxial containing groove and the coaxial light hole penetrate through the light source containing rack, the inner diameter of the coaxial light hole is smaller than the inner diameter of the coaxial containing hole, the light source fixing rack is arranged in the coaxial containing groove, the middle of the light source fixing rack is provided with a fixed center hole, the central axis of the fixed center hole, the central axis of the coaxial light hole and the central axis of the conical cover are on the same straight line, the end surface of the light source fixing rack close to the conical cover is provided with a mounting inclined surface, and the plurality of light sources are evenly arranged on the mounting inclined surface at positions corresponding to the conical cover opening.

[0007] Further, the light source fixing rack is provided with a fixing protrusion on the side wall of the end away from the conical cover, and the outer diameter of the fixing protrusion is equal to the outer diameter of the light source containing rack; the distance from the end close to the conical cover to the central axis of the fixed center hole of the mounting inclined surface gradually decreases.

[0008] Further, the light source module further comprises a coaxial light fixing support, the coaxial light fixing support is fixed on the end face of the light source fixing support away from the conical cover, and a center hole is arranged at the position corresponding to the fixed center hole on the coaxial light fixing support.

[0009] Preferably, the glass placement jig is provided with a limiting protrusion at the position of each of the two side edges perpendicular to each other on the end face of the conical cover.

[0010] Preferably, the recognition device further comprises a support, and the fixing module, the light source module and the recognition module are sequentially arranged on the support from bottom to top.

[0011] Compared with the prior art, the glass invisible two-dimensional code recognition device of the utility model, through setting the conical cover at the end of the coaxial light source close to the glass placement jig, setting the conical cover light inlet and outlet at the middle of the end of the conical cover away from the coaxial light source, can converge the light source, form obvious light spot on the target position and improve the illumination intensity; through setting the conical cover opening on the side wall of the conical cover, the light rays can be reduced, the two-dimensional code imaging contrast can be enhanced, and the recognition success rate of the glass invisible two-dimensional code can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0013] Figure 1 It is a structure schematic view of a glass invisible two-dimensional code recognition device of an embodiment of the utility model.

[0014] Figure 2 It is a structure schematic view of a light source module of an embodiment of the utility model.

[0015] Figure 3 It is a top view structure schematic view of Figure 2 .

[0016] Figure 4 It is a front view structure schematic view of Figure 3 .

[0017] Figure 5 It is a sectional view of Figure 2 along AA. DETAILED DESCRIPTION

[0018] For the purpose, structure, features, and functions of the present application, the following will be described in detail with examples.

[0019] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0020] Please refer to Figures 1 to 5 The glass invisible two-dimensional code recognition device comprises a fixing module 10, a light source module 20 and a recognition module 30, and the fixing module 10, the light source module 20 and the recognition module 30 are sequentially arranged from bottom to top.

[0021] The fixing module 10 comprises a glass placing jig 11 for fixing and placing the glass product 100 containing the invisible two-dimensional code.

[0022] The light source module 20 comprises a coaxial light source 21 and a conical cover 22, the conical cover 22 is arranged at one end of the coaxial light source 21 close to the glass placing jig 11, a conical cover light inlet and outlet 221 is arranged in the middle of the other end of the conical cover 22 away from the coaxial light source 21, so that the light source is converged to form obvious light spots on the target position and improve the illumination intensity, a conical cover opening 222 is arranged on the side wall of the conical cover 22, and the conical cover opening 222 is in communication with the conical cover light inlet and outlet 221, so as to reduce the incident light and further enhance the imaging contrast of the two-dimensional code.

[0023] The recognition module 30 comprises a camera 31 and a telecentric lens 32, the telecentric lens 32 is arranged at one end of the camera 31 close to the coaxial light source 21, and the optical axis of the telecentric lens 32, the central axis of the coaxial light source 21 and the central axis of the conical cover are located on the same straight line, so as to supplement light for the lens field of view by the coaxial light source 21 cooperating with the telecentric lens 32.

[0024] The glass invisible two-dimensional code recognition device of the present application is characterized in that the conical cover 22 is arranged at one end of the coaxial light source 21 close to the glass placing jig 11, the conical cover light inlet and outlet 221 is arranged in the middle of the other end of the conical cover 22 away from the coaxial light source 21, so as to converge the light source to form obvious light spots on the target position and improve the illumination intensity, the conical cover opening 222 is arranged on the side wall of the conical cover 22, so as to reduce the incident light and further enhance the imaging contrast of the two-dimensional code, and effectively improve the recognition success rate of the glass invisible two-dimensional code.

[0025] In a preferred embodiment, the identification device further comprises a support (not shown in the figure), and the fixed module 10, the light source module 20 and the identification module 30 are sequentially arranged on the support from bottom to top.

[0026] In order to ensure the converging effect of the conical cover 22 on the light source, the coaxial light source 21 comprises a coaxial light source body and a plurality of light sources 213, which are uniformly arranged in the coaxial light source body at positions not corresponding to the conical cover opening 222.

[0027] Specifically, please refer to Figure 2 and Figure 4 , the coaxial light source body comprises a light source containing rack 211 and a light source fixing rack 212.

[0028] The coaxial containing groove 2111 is provided in the middle of the end of the light source containing rack 211 away from the conical cover 22, the middle of the groove bottom surface of the coaxial containing groove 2111 is provided with a coaxial light hole 2112, the coaxial containing groove 2111 and the coaxial light hole 2112 penetrate through the light source containing rack 211, and the inner diameter of the coaxial light hole 2112 is smaller than the inner diameter of the coaxial containing groove 2111.

[0029] The light source fixing rack 212 is arranged in the coaxial containing groove 2111, the middle of the light source fixing rack 212 is provided with a fixed center hole 2121, the center axis of the fixed center hole 2121, the center axis of the coaxial light hole 2112 and the center axis of the conical cover are located on the same straight line, the end surface of the light source fixing rack 212 close to the conical cover 22 is provided with a mounting inclined surface 2122, and the plurality of light sources 212 are uniformly arranged on the mounting inclined surface 2122 at positions not corresponding to the conical cover opening 222.

[0030] In order to make the light of the plurality of light sources 212 more concentrated, the distance from the end close to the conical cover 22 to the end away from the conical cover 22 to the fixed center hole 2121 of the mounting inclined surface 2122 gradually decreases.

[0031] In order to facilitate the connection of the light source module and other components through the light source fixing rack, the light source fixing rack 212 is provided with a fixed protrusion 2123 on the side wall of the end away from the conical cover 22, and the outer diameter of the fixed protrusion 2123 is equal to the outer diameter of the light source containing rack 211.

[0032] Further, please refer to Figure 1 , the light source module 20 further comprises a coaxial light fixing support 23, the coaxial light fixing support 23 is fixed on the end surface of the light source fixing rack 212 away from the conical cover 22, and the coaxial light fixing support 23 is provided with a center hole 231 at a position corresponding to the fixed center hole 2121, so that the position and angle of the light source can be adjusted through the light source fixing support 23, thereby reducing the background reflection and highlighting the two-dimensional code imaging effect.

[0033] In order to ensure that the glass product 100 will not move randomly on the glass placement fixture 11, please refer to Figure 1 The glass placement fixture 11 is provided with a limiting protrusion on the end face of the conical cover 22 close to the two side edges perpendicular to each other.

[0034] In actual use, the recognition module 30 further comprises a decoder, which is used to decode the hidden two-dimensional code image acquired by the camera 31.

[0035] The glass hidden two-dimensional code recognition device of the utility model, through setting conical cover in coaxial light source close to glass placement fixture one end, conical cover far from coaxial light source one end middle part sets conical cover light inlet and outlet, convenient for light source convergence, form obvious light spot on target position, promote illumination intensity, through setting conical cover opening on one side wall of conical cover, can reduce to the light ray, enhance two-dimensional code imaging contrast, effectively improve the recognition success rate of glass hidden two-dimensional code.

[0036] The utility model has been described by the above related embodiments, however the above embodiment is only the example of implementation of the utility model. In addition, the technical features involved in the different embodiments of the utility model described above can be combined with each other as long as they do not conflict with each other. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and refinements made without departing from the spirit and scope of the utility model are within the scope of the patent protection of the utility model.

Claims

1. A glass invisible QR code recognition device, characterized in that, The device comprises a fixing module, a light source module and an identification module, which are sequentially arranged from bottom to top. The fixing module comprises a glass placement jig. The light source module comprises a coaxial light source and a conical cover, the conical cover is arranged at one end of the coaxial light source close to the glass placement jig, a conical cover light inlet and outlet is arranged at the middle of the other end of the conical cover away from the coaxial light source, a conical cover opening is arranged on the side wall of the conical cover, and the conical cover opening is in communication with the conical cover light inlet and outlet. The identification module comprises a camera and a telecentric lens, the telecentric lens is arranged at one end of the camera close to the coaxial light source, and the optical axis of the telecentric lens, the central axis of the coaxial light source and the central axis of the conical cover are located on the same straight line.

2. The glass contactless two-dimensional code recognition device according to claim 1, characterized in that, The coaxial light source comprises a coaxial light source body and a plurality of light sources, the plurality of light sources are uniformly arranged in the coaxial light source body at positions corresponding to the conical cover opening.

3. The glass contactless two-dimensional code recognition device according to claim 2, characterized in that, The coaxial light source body comprises a light source containing rack and a light source fixing rack, the coaxial containing groove is arranged at the middle of the other end of the light source containing rack away from the conical cover, the middle of the groove bottom surface of the coaxial containing groove is provided with a coaxial light hole, the coaxial containing groove and the coaxial light hole penetrate through the light source containing rack, the inner diameter of the coaxial light hole is smaller than the inner diameter of the coaxial containing groove, the light source fixing rack is arranged in the coaxial containing groove, the middle of the light source fixing rack is provided with a fixed center hole, the central axis of the fixed center hole, the central axis of the coaxial light hole and the central axis of the conical cover are located on the same straight line, the end surface of the light source fixing rack close to the conical cover is provided with a mounting inclined surface, and the plurality of light sources are uniformly arranged on the mounting inclined surface at positions corresponding to the conical cover opening.

4. The glass contactless two-dimensional code recognition device according to claim 3, characterized in that, The distance from the end close to the conical cover to the end away from the conical cover to the central axis of the fixed center hole of the mounting inclined surface gradually decreases.

5. The glass contactless two-dimensional code recognition device according to claim 3, characterized in that, The light source fixing rack is provided with a fixing protrusion on the side wall of the end away from the conical cover, and the outer diameter of the fixing protrusion is equal to the outer diameter of the light source containing rack.

6. The glass contactless two-dimensional code recognition device according to claim 5, characterized in that, The light source module further comprises a coaxial light fixing support, the coaxial light fixing support is fixed on the end surface of the light source fixing rack away from the conical cover, and a center hole is arranged on the coaxial light fixing support at a position corresponding to the fixed center hole.

7. The glass contactless two-dimensional code recognition device according to claim 1, characterized in that, Limiting protrusions are arranged on the end surface of the glass placement jig close to the conical cover at positions corresponding to two side edges perpendicular to each other.

8. The glass contactless two-dimensional code recognition device according to claim 1, characterized in that, The device further comprises a support, and the fixing module, the light source module and the identification module are sequentially arranged on the support from bottom to top.

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