CN110888286A

CN110888286A - Line scanning camera light source system

Info

Publication number: CN110888286A
Application number: CN201911275960.8A
Authority: CN
Inventors: 李功燕; 蔡烨
Original assignee: Jiangsu Intelligent Manufacturing Technology Co Ltd
Current assignee: Jiangsu Intelligent Manufacturing Technology Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-03-17

Abstract

The application relates to a camera light source system is swept to line belongs to intelligent commodity circulation technical field, include: control panel, lamp plate, inner lens, outer lens, dustproof glass, the control panel with the lamp plate is connected, the central point of lamp plate with the coincidence of inner lens's central point, outer lens with inner lens parallel places, outer lens is kept away from one side of lamp plate is provided with dustproof glass. The problem of the camera system is swept to line among the current scheme volume great, with high costs and difficult transportation is solved, reached and integrated in an organic whole with each functional module, improved the integrated level, reduced the volume of system, be convenient for installation and debugging and the effect of transportation. And the system finishes various debugs before leaving the factory, and does not need to adjust internal components in actual use, thereby reducing the use difficulty.

Description

Line scanning camera light source system

Technical Field

The application relates to a line scanning camera light source system, and belongs to the technical field of intelligent logistics.

Background

Faster and more accurate handling of packages is critical to the warehouse logistics and distribution logistics industry, and therefore the most advanced automatic identification systems are needed to reliably and automatically handle packages in the pick-and-place process. Only after the packages are accurately identified can the goods be automatically recorded, sorted, warehoused and delivered. The barcode visual recognition system is therefore in a very important and critical position for the whole logistics sorting system.

The camera system of the bar code visual identification system mainly comprises an area-array camera system and a line-scan camera system. Compared with an area-array camera system, the line scan camera system mainly has the following advantages: the method has higher data transmission rate and is suitable for higher-speed application; the linear scanning camera system has higher resolution and is suitable for higher precision requirement and the application of imaging of a continuous moving object; and thirdly, the line scanning camera has a larger dynamic range and higher sensitivity, and is suitable for application in a large-breadth view field.

The line scanning camera light source system is mainly oriented to an intelligent logistics sorting system and used for providing uniform and stable light spots for the line scanning camera identification system. The traditional line scanning camera light source system has the advantages of large volume, low integration level, adoption of the design of separating the camera system from the light source system, high cost and inconvenience for transportation and maintenance.

Disclosure of Invention

The application provides a camera light source system is swept to line can solve the problem that camera light source system is swept to line in the current scheme is bulky, with high costs and difficult transportation. The application provides the following technical scheme:

in a first aspect, a line scan camera light source system is provided, the system comprising: control panel, lamp plate, inner lens, outer lens, dustproof glass, the control panel with the lamp plate is connected, the central point of lamp plate with the coincidence of inner lens's central point, outer lens with inner lens parallel places, outer lens is kept away from one side of lamp plate is provided with dustproof glass.

Optionally, the lamp panel includes two at least lamp pearls, and the central point of every lamp pearl coincides with the central point of an interior lens.

Optionally, the at least two lamp beads are divided into n groups, each group of lamp beads is controlled by the control panel, and n is an integer greater than or equal to 2.

Optionally, the lamp beads in the lamp panel are high-brightness light-emitting diode (LED) lamp beads of GRE-XTE.

Optionally, the system further comprises a heat dissipation device, and the heat dissipation device is located on the periphery of the lamp panel.

Optionally, the heat dissipation device includes a heat dissipation air duct and a heat dissipation fan, the heat dissipation air duct is located around the lamp panel, and the heat dissipation air duct is communicated with a space where the heat dissipation fan is located.

Optionally, the inner lens is a semi-cylindrical condensing lens.

Optionally, the outer lens is a grating fresnel lens.

Optionally, the substrate of the lamp panel is made of aluminum.

The beneficial effect of this application lies in:

the line scanning camera light source system comprises a camera, a control panel, a lamp panel, an inner lens, an outer lens and dustproof glass, wherein the control panel is connected with the lamp panel, the center point of the lamp panel is coincided with the center point of the inner lens, the outer lens is arranged in parallel with the inner lens, and the dustproof glass is arranged on one side, away from the lamp panel, of the outer lens; the problem of the camera system is swept to line among the current scheme volume great, with high costs and difficult transportation is solved, reached and integrated in an organic whole with each functional module, improved the integrated level, reduced the volume of system, be convenient for installation and debugging and the effect of transportation. And the system finishes various debugs before leaving the factory, and does not need to adjust internal components in actual use, thereby reducing the use difficulty.

The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clear and clear, and to implement the technical solutions according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.

Drawings

Fig. 1 to 3 are schematic structural views of a light source system of a line scan camera according to the present invention;

FIG. 4 is a schematic view of an inner lens according to the present invention;

FIG. 5 is a light path diagram of the inner and outer lenses of the present invention;

FIG. 6 is a schematic view of the outer lens of the present invention;

fig. 7 to 10 are schematic diagrams of the light supplement light spot according to the present invention.

Detailed Description

The following detailed description of embodiments of the present application will be described in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.

Referring to fig. 1 (a front view of a line scan camera light source system), fig. 2 (an oblique view of the line scan camera light source system) and fig. 3 (a top view of the line scan camera light source system), a line scan camera light source system provided by an embodiment of the present application is shown, as shown in fig. 1 to fig. 3, the system includes:

camera 10, control panel 20, lamp plate 30, interior lens 40, outer lens 50, dustproof glass 60, camera 10 orientation outer lens 40, lamp plate 30 with outer lens 50 is located the both sides of camera 10, control panel 20 with lamp plate 30 is connected, the central point of lamp plate 30 with the coincidence of the central point of interior lens 40, outer lens 50 with interior lens 40 parallel placement, outer lens 50 is kept away from one side of lamp plate 30 is provided with dustproof glass 60.

The distance between the outer lens and the inner lens may be set according to a use requirement, which is not limited in this embodiment.

It should be added that the camera 10 is only included in the line scan camera light source system in the figure for illustration, and in practical implementation, the camera 10 may not be included. The positional relationship between the camera 10 and the inner lens 40 and the outer lens 50 may also be designed differently based on different usage scenarios, which is not limited in this embodiment.

The line scanning camera light source system comprises a control panel, a lamp panel, an inner lens, an outer lens and dustproof glass, wherein the control panel is connected with the lamp panel, the center point of the lamp panel is coincided with the center point of the inner lens, the outer lens is arranged in parallel with the inner lens, and the dustproof glass is arranged on one side, away from the lamp panel, of the outer lens; the problem of the camera system is swept to line among the current scheme volume great, with high costs and difficult transportation is solved, reached and integrated in an organic whole with each functional module, improved the integrated level, reduced the volume of system, be convenient for installation and debugging and the effect of transportation. And the system finishes various debugs before leaving the factory, and does not need to adjust internal components in actual use, thereby reducing the use difficulty.

The above scheme only takes the light source system including the above components as an example, and in actual implementation, the light source system may further include other components, such as a power supply for supplying power to the lamp bead and the camera 10. The power supply may be 24V dc power, or may be ac power in practical implementation, which is not limited to this. The power supply can adopt an LT (Light-Emitting Diode) constant-current driving scheme, the driving scheme supports wide-range voltage input DC 6V-DC 100V and can support working modes such as a boosting mode, a voltage reduction-boosting mode, a voltage reduction mode, a SEPIC (single ended primary inductance converter) and a flyback mode; can handle wide variation range voltage input, have and overflow, cross undervoltage, shut down, open circuit and detect and protect function, the luminance control of wide range can be realized to the combination of the simulation dimming function of high accuracy and PWM (Pulse Width modulation, Pulse width modulation technique) dimming, and this system adopts the mode of stepping up, chooses safe low pressure DC24V power supply for use, and the system supports the mode of stroboscopic control and normal bright control. In the above, the power supply is taken as a constant current drive, and in practical implementation, the power supply may also be a constant voltage drive, which is not described herein again. In addition, in actual implementation, different chips or functional modules can be used according to different design requirements.

The lamp panel 30 may include one or more lamp beads, for example, the lamp panel 30 includes at least two lamp beads, and a center point of each lamp bead coincides with a center point of one inner lens 40. That is, the number of the inner lenses 40 is the same as the number of the lamp beads. The lamp beads can be high-brightness light-emitting diode (LED) lamp beads of GRE-XTE, so that the stability of the lamp beads is improved, and the characteristics of low power consumption, high brightness, no stroboflash and the like are realized. Meanwhile, at least two lamp beads can adopt multiple colors, and the image quality can be optimized under the background of various colors through light sources with different wavelengths, so that the control system can conveniently and easily read characters, bar codes and the like.

During actual implementation, two at least lamp pearls can be by control panel 20 unified control, also unified control lamp pearl bright or dark etc. certainly, during actual implementation, two at least lamp pearls can also be divided into n and organize, and every group lamp pearl is controlled by control panel 20 respectively. Because n group lamp pearls are controlled by control panel 20 respectively, reached and to each group respectively adjust the colour, the luminance of lamp pearl, can reach better illuminating effect.

Inner lens 40 is half cylinder condensing lens, and this kind of lens is compared with traditional prism, and the spotlight effect is obvious more excellent, can be better to every lamp pearl training, and can carry out the border and receive light, and the facula degree of consistency of formation is better. Referring to fig. 4, a schematic diagram of the inner lens 40 is shown.

Referring to fig. 5, the outer lens 50 is a grating fresnel lens. Of course, the outer lens 50 may be a common lens in actual implementation. The conventional convex lens has the phenomenon of darkening and blurring corners, because the refraction of light only occurs at the interface of the medium, the convex lens is thick, and the light rays are attenuated by the part of the light which linearly propagates in the glass. If the straight-line transmission part can be removed and only the curved surface which is refracted is reserved, a large amount of materials can be saved and the same light-gathering effect can be achieved. The fresnel lens is glass which looks like a plurality of concentric circular lines (i.e. fresnel zones), but can achieve the effect of a convex lens, if the projection light source is parallel light, the brightness of each position of the image can be kept consistent after the projection is converged, and in a possible implementation, the fresnel lens can be made of PMMA (Polymethyl methacrylate).

Compared with a common convex lens, the grating Fresnel outer lens 50 can generate a small-angle bar-shaped light spot, is very thin in thickness, can greatly reduce the whole volume of a system, is lower in cost, and is much higher in batch production yield.

Referring to fig. 6, there is shown an optical path diagram of the inner and outer lenses 50. Also, a fill light region having a maximum width of 150mm × 1200mm can be formed by using the inner lens 40 and the outer lens 50 combined as described above, for example, see fig. 7, which shows a fill light spot formed at 3 meters. In addition, please refer to fig. 8 to 10, which respectively show the fill-in light spots at 400mm, 800mm and 1200 mm.

In addition, in a possible implementation manner, the light source system of the line scan camera 10 may further include a heat dissipation device, where the heat dissipation device is used to dissipate heat for the lamp panel 30, that is, the heat dissipation device may be disposed on the periphery of the lamp panel 30. In a possible implementation manner, the heat dissipation device may include a heat dissipation air duct 70 and a heat dissipation fan 80, the heat dissipation air duct is located on the periphery of the lamp panel 30, and the heat dissipation air duct 70 is communicated with a space where the heat dissipation fan 80 is located, see fig. 1 specifically. Optionally, the substrate of the lamp panel 30 may be made of aluminum, so that the heat dissipation of the whole lamp is facilitated; for example, the LED lamp panel 30 is made of an aluminum substrate PCB (Printed Circuit Board) with ultrahigh thermal conductivity, and the heat dissipation of the LED lamp is optimized obviously; the back is provided with a high-power radiating fan to support a normally bright working mode, so that the long-time work is facilitated, and the service life is prolonged. Of course, the substrates of the inner lens 40 and the outer lens 50 may also be made of aluminum for better heat dissipation, and will not be described in detail herein.

The system comprehensively considers the problems of electrostatic protection, electromagnetic interference protection, vibration resistance, timely heat dissipation and the like of a high-frequency electronic circuit, and can adapt to complex and harsh industrial environments.

In addition, the above disclosed light source system of the pre-scan camera 10 can accommodate ambient temperatures of-20 to 50 degrees celsius.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A line scan camera light source system, the system comprising: control panel, lamp plate, inner lens, outer lens, dustproof glass, the control panel with the lamp plate is connected, the central point of lamp plate with the coincidence of inner lens's central point, outer lens with inner lens parallel places, outer lens is kept away from one side of lamp plate is provided with dustproof glass.

2. The system of claim 1, wherein the lamp panel comprises at least two lamp beads, and a center point of each lamp bead coincides with a center point of one of the inner lenses.

3. The system of claim 2, wherein the at least two beads are divided into n groups, each group of beads is controlled by the control board, and n is an integer greater than or equal to 2.

4. The system of claim 2, wherein the lamp beads in the lamp panel are high brightness Light Emitting Diode (LED) beads of GRE-XTE.

5. The system of claim 1, further comprising a heat sink positioned around the periphery of the lamp panel.

6. The system of claim 5, wherein the heat dissipation device comprises a heat dissipation air duct and a heat dissipation fan, the heat dissipation air duct is located on the periphery of the lamp panel, and the heat dissipation air duct is communicated with a space where the heat dissipation fan is located.

7. The system of any of claims 1 to 6, wherein the inner lens is a semi-cylindrical condenser lens.

8. The system of any one of claims 1 to 6, wherein the outer lens is a grating Fresnel lens.

9. The system of any one of claims 1 to 6, wherein the substrate of the lamp panel is made of aluminum.