Linear scanning light source with temperature protection function

Abstract

The utility model discloses a linear scanning light source with a temperature protection function, which comprises a heat dissipation base, a controller and a light-emitting component arranged on the heat dissipation base, the heat dissipation base is further provided with a linear component, the linear component is used for converting divergent light rays of the light-emitting component into linear light rays, and the linear light rays are connected with the controller. The light-emitting assembly comprises a PCB electrically connected with the controller and a plurality of LED lamp beads integrated on the PCB, a temperature switch sensor is further arranged on the PCB, and the temperature switch sensor is electrically connected with the controller and can detect the temperature of the PCB. The temperature switch sensor is arranged on the PCB and used for detecting the temperature of the PCB, so that when the temperature of the light source reaches the preset value, the light source can be automatically turned off to be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of visual inspection, and particularly relates to a line scan light source with a temperature protection function. Background Technique

[0002] Visual inspection is to use a machine to replace the human eye for measurement and judgment. Visual inspection refers to converting the target to be captured into an image signal through a machine vision product (i.e., an image acquisition device, divided into two types: CMOS and CCD), and transmitting it to a dedicated image processing system. According to the pixel distribution, brightness, color and other information, it is converted into a digital signal; the image system performs various operations on these signals to extract the features of the target, and then controls the actions of on-site equipment according to the discrimination results. Visual inspection is widely used in the detection of product defects.

[0003] Among them, the light source is an essential component for visual inspection. When detecting bar code-like items and strip-like items, a linear light source is usually required to perform supplementary lighting on the item to be detected. At present, general line scan light sources are not provided with a temperature protection device. However, some line scan light sources use too high power or for too long to meet the lighting requirements, resulting in excessive heat generation, insufficient heat dissipation of the housing, or when there is a problem with heat dissipation, the high-brightness light source will accumulate a large amount of heat in a short time. When the maximum temperature that the LED lamp beads can withstand is reached, the LED lamp beads will be damaged, thus affecting production detection and bringing a catastrophic impact. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a line scan light source with a temperature protection function, which can automatically turn off the light source to protect the light source when the temperature of the light source reaches a preset value.

[0005] The utility model is realized through the following technical solutions:

[0006] A line scan light source with a temperature protection function includes a heat dissipation base, a controller, and a light emitting component arranged on the heat dissipation base. A linear component is also arranged on the heat dissipation base, and the linear component is used to convert the divergent light of the light emitting component into linear light. The light emitting component includes a PCB circuit board electrically connected to the controller and a plurality of LED lamp beads integrated on the PCB circuit board. A temperature switch sensor is also arranged on the PCB circuit board, and the temperature switch sensor is electrically connected to the controller and can detect the temperature of the PCB circuit board;

[0007] When the temperature detected by the temperature switch sensor is less than the set value, the temperature switch sensor normally outputs a normally open signal to the controller, and the light emitting component is normally lit;

[0008] When the temperature detected by the temperature switch sensor is greater than or equal to the set value, the temperature switch sensor outputs a closed signal to the controller, and the lighting component stops lighting up.

[0009] Further, the linear component and the heat dissipation base form a sealed chamber, the lighting component is arranged in the sealed chamber, and is attached to the heat dissipation surface of the heat dissipation base.

[0010] Further, the sealed chamber includes a first chamber, the lighting component is arranged in the first chamber, and a light collecting rod is also arranged in the first chamber. The light collecting rod converts the divergent light of the plurality of LED lamp beads into the linear light.

[0011] Further, the sealed chamber further includes a second chamber, a light splitting plate is arranged in the second chamber, a first light exit and a second light exit are also arranged on the linear component. The light splitting plate reflects the linear light and emits it from the first light exit, and the scanned light after the linear light scans an object then passes through the first light exit and emits from the second light exit.

[0012] Further, the light splitting plate is arranged at an angle of 45° relative to the linear light.

[0013] Further, the linear component includes a first plate and a second plate, card slots are arranged on both the first plate and the second plate, the light splitting plate is clamped between the first plate and the second plate, and both ends of the light splitting plate are respectively arranged in the card slots.

[0014] Further, the linear component further includes a first sealing plate, the first sealing plate is fixedly connected to the first plate, and a second positive lens is also arranged between the first sealing plate and the first plate.

[0015] Further, the linear component further includes a second sealing plate, the second sealing plate is fixedly connected to the second plate, and a third positive lens is also arranged between the second sealing plate and the second plate.

[0016] Further, sealing rubber strips are arranged between the first sealing plate and the second positive lens and between the second sealing plate and the third positive lens for sealing.

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] 1. By arranging a temperature switch sensor on the PCB circuit board to detect the temperature of the PCB circuit board, when the temperature detected by the temperature switch sensor is less than the set value, the temperature switch sensor normally outputs a normally open signal to the controller, and the light source lights up normally;

[0019] When the temperature detected by the temperature switch sensor is greater than or equal to the set value, the temperature switch sensor outputs a closed signal to the controller, and the light source stops lighting, thereby achieving the effect of automatically turning off the light source when the temperature of the light source reaches the budget value to protect the light source.

[0020] 2. By setting a sealing plate at the light-emitting port of the linear component and simultaneously setting a sealing strip between the sealing plate and the condensing lens, the space inside the machine becomes a sealed waterproof chamber, so that the present utility model can have a certain waterproof ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Isometric view of a line scan light source with temperature protection function according to an embodiment of the present utility model;

[0022] Figure 2 Structural schematic diagram of a line scan light source with temperature protection function according to an embodiment of the present utility model;

[0023] Figure 3 Side view of a line scan light source with temperature protection function according to an embodiment of the present utility model;

[0024] Figure 4 Cross-sectional view of a line scan light source with temperature protection function according to an embodiment of the present utility model;

[0025] Figure 5 Exploded view of a line scan light source with temperature protection function according to an embodiment of the present utility model;

[0026] Figure 6 Circuit diagram of a line scan light source with temperature protection function according to an embodiment of the present utility model.

[0027] Reference numeral description: 1. Heat dissipation base; 2. Light-emitting component; 3. Temperature switch sensor; 4. Controller; 5. Linear component; 7. Sealing strip; 20. PCB circuit board; 21. LED lamp beads; 10. Water cooling channel; 11. Water inlet; 12. Water outlet; 13. Aviation socket; 50. Sealed chamber; 51. First chamber; 52. Condensing rod; 53. Second chamber; 54. Beam splitter; 55. First light outlet; 56. Second light outlet; 571. First condensing lens; 572. Second condensing lens; 573. Third condensing lens; 581. First sealing plate; 582. Second sealing plate; 60. First plate; 61. Second plate; 63. Side plate; 64. Baffle; 62. Card slot; 630. Fixed slot; 583. Annular groove; 601. Groove; 9. Linear light; 8. Object to be measured. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solution of the utility model will be further described in detail below in conjunction with the preferred embodiments and their accompanying drawings in a non-limiting manner. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model.

[0029] As Figure 1 shown in Figure 2 FIG. 7, a line scan light source with a temperature protection function according to an embodiment of the present utility model includes a heat dissipation base 1, a controller 4, and a light emitting component 2 disposed on the heat dissipation base 1. The heat dissipation base 1 is further provided with a linear component 5 for converting the divergent light of the light emitting component 2 into linear light 9. The light emitting component 2 is composed of a PCB circuit board 20 and a plurality of LED lamp beads 21 disposed on the PCB circuit board 20. A temperature switch sensor 3 is further disposed on the PCB circuit board 20, and the temperature switch sensor 3 can detect the temperature of the PCB circuit board 20.

[0030] As Figure 6 shown in FIG. 8 is the circuit diagram of the present utility model. The temperature switch sensor 3 and the PCB circuit board 20 are both electrically connected to the controller 4. When the temperature detected by the temperature switch sensor 3 is less than the set value, the temperature switch sensor 3 normally outputs a normally open signal to the controller 4, and the light emitting component 2 is normally lit. When the temperature detected by the temperature switch sensor 3 is greater than or equal to the set value, the temperature switch sensor 3 outputs a closed signal to the controller 4, and the light emitting component 2 stops lighting. Specifically, in this embodiment, the set value is 90 °C.

[0031] Specifically, as Figures 2 to 5As shown, the PCB circuit board 20 is strip-shaped, and a number of LED lamp beads 21 are arranged in a strip shape and evenly distributed on one side of the PCB circuit board 20 and electrically connected thereto. In this embodiment, the heat dissipation base 1 dissipates heat through water cooling. Specifically, the heat dissipation base 1 is attached to the other side of the PCB circuit board 20 to absorb the heat of the PCB circuit board 20. A water cooling channel 10 is provided inside the heat dissipation base 1, and a water inlet 11 and a water outlet 12 are also provided on the water cooling channel 10. The relatively cold water enters the water cooling channel 10 from the water inlet 11 and flows out from the water outlet 12. An aviation socket 13 is also provided on the heat dissipation base 1 for electrical connection with other machines.

[0032] As Figure 3 With Figure 4 As shown, the linear component 5 includes a beam splitter 54 and a light collecting rod 52. The light collecting rod 52 is arranged in front of the light emitting component 2 to convert the divergent light of a number of LED lamp beads 21 into linear light 9. The linear component 5 and the heat dissipation base 1 form a sealed chamber 50, and the light emitting component 2, the beam splitter 54 and the light collecting rod 52 are all arranged in the sealed chamber 50. Specifically, the linear component 5 further includes a first plate 60, a second plate 61, two side plates 63 and a baffle 64. The first plate 60, the second plate 61, the two side plates 63 and the baffle 64 surround and form the sealed chamber 50. The sealed chamber 50 includes a first chamber 51 and a second chamber 53. Grooves 601 are provided on both the first plate 60 and the second plate 61. A first positive lens 571 is provided in front of the light collecting rod 52. Both ends of the first positive lens 571 are respectively arranged in the grooves 601 of the first plate 60 and the second plate 61, and the first positive lens 571 divides the sealed chamber 50 into the first chamber 51 and the second chamber 53. The light emitting component 2 and the light collecting rod 52 are arranged in the first chamber 51, and the beam splitter 54 is arranged in the second chamber 53.

[0033] Fixing grooves 630 are formed on both of the two side plates 63 for fixing the light collecting rod 52. Both ends of the light collecting rod 52 are respectively stuck in the fixing grooves 630 of the two side plates 63. In this embodiment, the fixing grooves 630 are set to be square, and the side length of the fixing grooves 630 is the same as the diameter of the light collecting rod 52.

[0034] A first light outlet 55 and a second light outlet 56 are also provided on the linear component 5. Among them, the first light outlet 55 is provided on the second plate 61, and the second light outlet 56 is provided on the first plate 60. The beam splitter 54 is arranged obliquely to reflect the linear light 9 and emit it from the first light outlet 55. The scanning light after the linear light 9 scans an object then passes through the first light outlet 55 and emits from the second light outlet 56. Among them, the beam splitter 54 is arranged at 45° relative to the linear light 9. Card slots 62 are provided on both the first plate 60 and the second plate 61. The beam splitter 54 is clamped between the first plate 60 and the second plate 61, and both ends of the beam splitter 54 are respectively arranged in the card slots 62. Among them, the object to be measured 8 is arranged below.

[0035] The linear component 5 further includes a first sealing plate 581 and a second sealing plate 582. The first sealing plate 581 is fixedly connected to the first plate 60, and a second positive lens 572 is further provided between the first sealing plate 581 and the first plate 60. The second sealing plate 582 is fixedly connected to the second plate 61, and a third positive lens 573 is further provided between the second sealing plate 582 and the second plate 61. Specifically, in this embodiment, the first sealing plate 581 and the first plate 60 are connected by screws (not shown in the figure) and clamp the second positive lens 572 in the middle for fixation. The second sealing plate 582 and the second plate 61 are fixedly connected by screws (not shown in the figure) and clamp the third positive lens 573 in the middle for fixation. Since the light transmittance of the positive lens is not 100%, the third positive lens 573 is provided with a certain curvature to reduce the influence caused by reflection.

[0036] In addition, sealing rubber strips 7 are provided between the first sealing plate 581 and the second positive lens 572 and between the second sealing plate 582 and the third positive lens 573 for sealing and waterproofing. Annular grooves 583 are formed on both the first sealing plate 581 and the second sealing plate 582, and the sealing rubber strips 7 are accommodated in the annular grooves 583.

[0037] During use, the water inlet 11 and the water outlet 12 are connected to an external water circulation device, and the present utility model can be electrically connected to other machines through the aviation socket 13.

[0038] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A line-scanning light source with a temperature protection function, comprising a heat dissipation base (1), a controller (4), and a light-emitting component (2) arranged on the heat dissipation base (1), characterized in that, A linear component (5) is further provided on the heat dissipation base (1). The linear component (5) is used to convert the divergent light of the light emitting component (2) into linear light (9). The light emitting component (2) includes a PCB circuit board (20) electrically connected to the controller (4) and a plurality of LED beads (21) integrated on the PCB circuit board (20). A temperature switch sensor (3) is further provided on the PCB circuit board (20). The temperature switch sensor (3) is electrically connected to the controller (4) and can detect the temperature of the PCB circuit board (20). When the temperature detected by the temperature switch sensor (3) is less than the set value, the temperature switch sensor (3) normally outputs a normally open signal to the controller (4), and the light emitting component (2) is normally lit. When the temperature detected by the temperature switch sensor (3) is greater than or equal to the set value, the temperature switch sensor (3) outputs a closed signal to the controller (4), and the light emitting component (2) stops lighting.

2. The line-scanning light source with temperature protection function according to claim 1, characterized in that, The linear component (5) and the heat dissipation base (1) form a sealed chamber (50). The light emitting component (2) is arranged in the sealed chamber (50) and is attached to the heat dissipation surface of the heat dissipation base (1).

3. The line scan light source with temperature protection function according to claim 2, characterized in that, The sealed chamber (50) includes a first chamber (51). The light emitting component (2) is arranged in the first chamber (51), and a light collecting rod (52) is further arranged in the first chamber (51). The light collecting rod (52) converts the divergent light of the plurality of LED beads (21) into the linear light (9).

4. The line scan light source with temperature protection function according to claim 3, characterized in that The sealed chamber (50) further includes a second chamber (53). A beam splitting plate (54) is arranged in the second chamber (53). A first light outlet (55) and a second light outlet (56) are further provided on the linear component (5). The beam splitting plate (54) reflects the linear light (9) and emits it from the first light outlet (55). The scanned light after the linear light (9) scans an object then passes through the first light outlet (55) and is emitted from the second light outlet (56).

5. The line scan light source with temperature protection function according to claim 4, characterized in that The beam splitting plate (54) is arranged at 45° relative to the linear light (9).

6. The line scan light source with temperature protection function according to claim 4, wherein The linear component (5) includes a first plate (60) and a second plate (61). Card slots (62) are provided on both the first plate (60) and the second plate (61). The beam splitting plate (54) is clamped between the first plate (60) and the second plate (61), and both ends of the beam splitting plate (54) are respectively arranged in the card slots (62).

7. The line-scanning light source with temperature protection function according to claim 6, characterized in that The linear component (5) further includes a first sealing plate (581). The first sealing plate (581) is fixedly connected to the first plate (60), and a second positive lens (572) is further arranged between the first sealing plate (581) and the first plate (60).

8. The line-scanning light source with temperature protection function according to claim 7, characterized in that, The linear component (5) further includes a second sealing plate (582). The second sealing plate (582) is fixedly connected to the second plate (61), and a third positive lens (573) is further arranged between the second sealing plate (582) and the second plate (61).

9. The line-scanning light source with temperature protection function according to claim 8, characterized in that, A sealing strip (7) is provided between the first sealing plate (581) and the second positive lens (572) and between the second sealing plate (582) and the third positive lens (573) for sealing.

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