LED lamp brightness detection device and method thereof

Abstract

The invention belongs to the technical field of LED lamp tubes, and discloses an LED lamp brightness detection device and a method thereof.The device comprises a detection device and a feeding device used for feeding materials to the detection device, the detection device comprises a detection table and a detection cavity, the device further comprises a first detection assembly arranged in the detection cavity, and the first detection assembly comprises a traction unit; the traction unit is used for clamping a lamp tube in the detection chamber and pulling the lamp tube to move spirally, and the traction unit comprises an electrifying module for supplying power to a lamp tube terminal; the detection unit is used for detecting the brightness of the lamp tube, the detection unit comprises two symmetrically arranged light shielding plates, and the light shielding plates are provided with through holes matched with the outer diameter of the lamp tube; according to the scheme, the lamp tube is clamped by the traction unit, spirally moves in the detection chamber and then is matched with the shading plate, so that the brightness of the lamp tube is detected in a segmented manner, and the interference of over-brightness of one segment on detection results of other segments is avoided; the problem that an existing detection device cannot detect the lamp tube in a segmented mode is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of LED lamps, and specifically relates to a device and method for detecting the brightness of an LED lamp. Background Art

[0002] LED is the latest light source in the field of "green lighting" in the 21st century. It is still the latest emerging electric light source both at home and abroad. LED lamp tube is an important variety of LED lighting products. It is mainly composed of LED lamp board, lamp tube aluminum profile and light-transmitting mask. The LED lamp board is composed of LED lamp beads and circuit board, and is installed on the lamp holder substrate in the lamp tube aluminum profile.

[0003] Referring to the document with the existing publication (announcement) number CN114755601A, a power-on detection device and a detection method for an LED lamp tube are disclosed. The device includes a detection frame and support legs for supporting and fixing the detection frame. The detection frame includes two guide rail frames distributed front and back, and the two ends of the two guide rail frames are respectively connected and fixed by two connecting plates. An operating track is arranged on the guide rail frame, and an operating detection mechanism is arranged in the operating track. An automatic feeding mechanism is arranged below the detection frame.

[0004] The above-mentioned detection device moves in the running track through multiple clamping power-on units, so that multiple lamp tubes to be tested can be powered on at the same time, and it can ensure that the lamp tubes are powered on for a long enough time, so as to have a better detection effect. However, the above-mentioned brightness detection is to detect the brightness of the "whole" lamp tube, and the LED lamp tube needs to ensure that the brightness of the entire lamp tube is uniform during detection to ensure consistent lighting effects. If the brightness of one section of the LED lamp tube is weaker and the brightness of other sections is stronger, even if the overall brightness of the entire lamp tube seems to be uniform, this uneven brightness distribution will still affect the lighting quality and cause lighting blind spots. Therefore, even if the total brightness of the entire lamp tube meets the requirements, this lamp tube with uneven brightness is still an unqualified product.

[0005] Currently, it is necessary to test a single lamp in sections so that the brightness of each section of the lamp can meet the qualified standards, avoiding the overall lighting effect being affected by insufficient brightness of one section, and also avoiding the interference of excessive brightness of one section on the brightness test results of other sections. Summary of the invention

[0006] The purpose of this solution is to provide a LED lamp brightness detection device to solve the problem that the existing detection device cannot detect the lamp tube in sections.

[0007] In order to achieve the above-mentioned object, the present invention provides an LED lamp brightness detection device, including a detection device and a feeding device for feeding the detection device, wherein the detection device includes a detection table and a detection chamber, and also includes a first detection component arranged in the detection chamber, wherein the first detection component includes: A traction unit, the traction unit is used to clamp and traction the lamp tube to move spirally in the detection chamber, the traction unit includes a power supply module for supplying power to the lamp tube terminal; The detection unit is used to detect the brightness of the lamp tube. The detection unit comprises two symmetrically arranged shading plates. The shading plates are provided with through holes matching the outer diameter of the lamp tube.

[0008] The principle of this scheme is: the two ends of the lamp tube are clamped by the traction unit, and then the terminals at both ends of the lamp tube are powered, and the lamp tube is pulled to move in a spiral lateral direction in the detection chamber. The light shield separates the lamp tube into a brightness detection area and a detection area, thereby preventing the brightness of the detection area from interfering with the brightness of the brightness detection area. The brightness detection area is then detected by the detection unit, and then the brightness of the lamp tube is detected separately in sections, thereby preventing one section from being too bright from interfering with the detection results of other sections.

[0009] The effect of this solution is that the existing method for testing the brightness of the entire lamp tube cannot ensure that the brightness of each section meets the standard, resulting in that even if the overall brightness is qualified, the lamp tube with uneven local brightness may be considered qualified, thus affecting the lighting effect. This solution clamps the lamp tube through the traction unit and moves it spirally in the detection chamber, and then cooperates with the shading plate to detect the brightness of the lamp tube in sections, avoiding the interference of one section being too bright on the detection results of other sections.

[0010] Furthermore, the detection unit is a brightness sensor, which is electrically connected to a controller; the traction unit includes a clamping ring, in which a connector for supplying power to the lamp tube terminal is provided, the clamping ring is connected to a screw, the screw is connected to a driving assembly for driving the screw to rotate, and the screw is threadedly connected to the shell of the detection chamber.

[0011] The principle and effect of this solution are as follows: the brightness sensor detects the brightness of the lamp tube by electrically connecting to the controller. The traction unit clamps the lamp tube through the clamping ring, and the built-in connector supplies power to the lamp tube terminal, so that the lamp tube is in a power-on state. The screw rod connected to the clamping ring cooperates with the hand wheel, and the driving assembly drives the screw rod to rotate, thereby driving the lamp tube to rotate and move laterally along the threaded path in the detection chamber.

[0012] Furthermore, it also includes a second detection component arranged in the detection chamber, the second detection component includes a detection chamber and a movable rod, the movable rod is slidably arranged in the detection chamber, the movable rod is penetrated by a spring for resetting the movable rod, one end of the movable rod extends out of the detection chamber and is rotatably connected to a detection roller, the detection roller is in contact with the outer wall of the lamp tube; it also includes a first marking component, the marking component is used to mark the convexity and concavity of the outer wall of the lamp tube according to the extension and retraction of the movable rod.

[0013] The principle and effect of this solution are as follows: the lampshade of the LED lamp tube will have bumps and depressions on its surface due to external forces. These bumps and depressions will change the reflection and refraction paths of light, resulting in uneven light distribution. Therefore, it is necessary to detect the depressions on the outer wall of the lampshade. This solution uses a detection roller to cling to the outer wall of the lamp tube. When there is a bulge on the outer wall of the lamp tube, the detection roller will drive the movable rod to move upward, thereby extending the movable rod; when there is a depression on the outer wall of the lamp tube, the spring drives the detection roller and the movable rod to move downward, thereby contracting the movable rod. The bumps and depressions on the outer wall of the lamp tube are then marked by a marking component according to the extension and retraction of the movable rod.

[0014] Further, the first marking assembly includes a first extrusion plate and a second extrusion plate, the first extrusion plate and the second extrusion plate are symmetrically arranged on the movable rod, a first chamber is provided above the first extrusion plate, and a second chamber is provided below the second extrusion plate, the first chamber and the second chamber are both flexible chambers, and the first chamber and the second chamber are both provided with paints of different colors, a marking tube is provided at the rear end of the detection roller, a first channel and a second channel are provided in the marking tube, the first channel is connected to the first chamber through a pipe, and the second channel is connected to the second chamber through a pipe.

[0015] The principle and effect of this scheme are: when the outer wall of the lamp tube is convex, the movable rod drives the first extrusion plate to move upward, so that the first extrusion plate squeezes the first chamber, so that the paint in the first chamber is squeezed out from the first channel and marked at the convex position of the lamp tube; when the outer wall of the lamp tube is concave, the movable rod drives the second extrusion plate to move downward, so that the second extrusion plate squeezes the second chamber, so that the paint in the second chamber is squeezed out from the second channel and marked at the concave position of the lamp tube.

[0016] Furthermore, it also includes a second marking component, which includes a third chamber and an electromagnet. A piston is provided in the third chamber, and a permanent magnet cooperating with the electromagnet is provided on the piston. The piston is connected to a return spring, and the free end of the return spring is connected to the third chamber. The third chamber is connected to the first chamber and the second chamber through a pipeline. A third channel is provided in the marking tube, and the third chamber is connected to the third channel through a pipeline; the electromagnet is electrically connected to a controller, and the controller is used to turn on and off the power of the electromagnet.

[0017] The principle and effect of this solution are as follows: when the detection unit detects that the brightness of the lamp tube does not meet the standard brightness, the controller controls the electromagnet to be energized, the electromagnet attracts the permanent magnet and the piston to move upward, so that negative pressure is generated in the third chamber, and the paint in the first chamber and the second chamber is sucked into the third chamber, so that the two different colors of paint are mixed to form a third color of paint, and then the controller controls the electromagnet to be de-energized, the permanent magnet loses the electromagnet attraction, and is reset under the drive of the reset spring, so that the piston squeezes the paint in the third chamber, so that the paint in the third chamber is squeezed out from the third channel onto the lamp tube, thereby marking that the brightness of the lamp tube does not meet the standard.

[0018] Furthermore, one end of the second extrusion plate is fixedly connected to the piston, the first extrusion plate is fixedly connected to the bottom of the third chamber, and the third chamber is fixedly arranged on the free end of the movable rod.

[0019] The principle and effect of this solution are: when detecting the concave and convex of the lamp tube, if the lamp tube has a convexity, the movable rod drives the third chamber to move upward, so that the first extrusion plate squeezes the first chamber; if the lamp tube has a concave, the movable rod drives the third chamber to move downward, so that the second extrusion plate squeezes the second chamber. When the brightness of the lamp tube does not meet the standard brightness, the piston moves upward, and the second extrusion plate will not squeeze the second chamber.

[0020] Furthermore, fan blades are provided in the third chamber.

[0021] The principle and effect of this solution is that the paint sucked into the first chamber and the paint sucked into the second chamber are mixed more evenly.

[0022] Furthermore, a slide groove is provided in the detection chamber, and the movable rod is slidably connected to the slide groove; a guide groove is provided in the third chamber, and the second extrusion plate is slidably connected to the guide groove.

[0023] The principle and effect of this solution are that the slide groove and the guide groove respectively provide positioning and guiding functions for the movement of the movable rod and the second extrusion plate.

[0024] Furthermore, a one-way valve is provided on the pipeline connecting the third chamber with the first chamber and the second chamber, and a one-way valve is provided on the pipeline connecting the third chamber with the third corridor.

[0025] The principle and effect of this solution are: the paint in the first chamber and the second chamber flows into the third chamber in one direction; the paint in the third chamber flows into the third channel in one direction.

[0026] A method for detecting brightness of an LED lamp, comprising applying the above-mentioned device for detecting brightness of an LED lamp, and comprising the following steps: Step S10: feeding and placing the lamps, manually placing the lamps into the feeding end of the feeding device, the feeding device arranges and places the lamps, and transports the lamps that have passed the inspection of the inspection device to the discharging end for discharging; Step S20: Brightness detection: the clamping ring clamps the two ends of the lamp tube and makes the joint contact with the terminal, the lamp tube is energized, and then the hand wheel is turned to drive the lamp tube to rotate into the detection chamber through the screw rod. The light shielding plate divides the lamp tube into detection areas, so that the brightness sensor detects the brightness of the lamp tube in sections; Step S30: brightness marking. If the brightness sensor detects that the brightness of the section of the lamp tube does not meet the standard, the controller controls the electromagnet to turn on and off power once, so as to suck the paint in the first chamber and the second chamber into the third chamber, and extrude the mixed paint through the third channel onto the outer wall of the section of the lamp tube; Step S40: Concave-convex detection. If the lamp is normal, the detection roller will not move up and down, and the paint in the first chamber and the second chamber will not be sprayed on the lamp; if the detection roller drives the movable rod to move upward, there will be a convexity on the outer wall of the surface lamp; if the detection roller drives the movable rod to move downward, there will be a concave on the outer wall of the surface lamp; Step S50: defect marking, when there is a bulge on the outer wall of the lamp tube, the first extrusion plate moves upward to squeeze the first chamber, so that the paint in the first chamber is squeezed out from the first channel and sprayed on the lamp tube; when there is a depression on the outer wall of the lamp tube, the second extrusion plate moves downward to squeeze the second chamber, so that the paint in the second chamber is squeezed out from the second channel and sprayed on the lamp tube; Step S60: Classify and return. If the lamp tube passes the inspection of the first detection component and the second detection component, the traction unit returns the lamp tube to the feeding device; if the brightness of the lamp tube does not meet the standard or has defects, the traction unit transports the lamp tube to the defective warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a LED lamp brightness detection device of the present invention; Figure 2 It is a schematic diagram of the internal structure of the detection chamber of the present invention; Figure 3 The structure diagram of the second detection component, the first marking component and the second marking component of the present invention is shown in FIG. Figure 1 ; Figure 4 The structure diagram of the second detection component, the first marking component and the second marking component of the present invention is shown in FIG. Figure 2 .

[0028] The figure marks in the drawings of the specification include: detection table 1, detection chamber 2, first detection component 3, shading plate 31, brightness sensor 32, clamping ring 33, screw 34, lamp tube 4, second detection component 5, detection chamber 51, movable rod 52, spring 53, detection roller 54, first marking component 6, first extrusion plate 61, second extrusion plate 62, first chamber 63, second chamber 64, marking tube 65, first corridor 651, second corridor 652, third corridor 653, second marking component 7, third chamber 71, electromagnet 72, piston 73, permanent magnet 74, return spring 75, fan blade 76. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the concept and technical effects of the present invention in combination with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention: See also Figure 1 and Figure 2 , a LED lamp brightness detection device, including a feeding device and a detection device arranged from left to right, the feeding device is used to place the feeding lamp tube 4. The detection device includes a detection table 1 and a detection chamber 2. A first detection component 3 is arranged in the detection chamber 2, the first detection component 3 includes a traction unit and a detection unit, the traction unit includes a clamping ring 33 and a screw rod 34 arranged symmetrically, both clamping rings 33 are provided with a connector for supplying power to the terminals of the lamp tube 4, so that the lamp tube 4 is always lit when powered on, one of the clamping rings 33 is fixedly connected to one end of the screw rod 34, the screw rod 34 is threaded with the shell of the detection chamber 2, and the screw rod 34 is connected to a driving device for driving the screw rod 34 to rotate, which can be a hand wheel or a motor. The detection unit includes a shading plate 31 and a brightness sensor 32, the shading plate 31 is provided with a through hole matching the outer diameter of the lamp tube 4, the number of the shading plates 31 is two shading plates 31 symmetrically arranged on both sides of the brightness sensor 32, the brightness sensor 32 is arranged above the lamp tube 4, and is electrically connected to a controller.

[0030] Specific working principle: The traction unit clamps the two ends of the lamp tube 4 through the clamping ring 33, and then the connector supplies power to the terminals of the lamp tube 4, so that the lamp tube 4 is in a power-on and always-on state. The driving device drives the rod screw to rotate, thereby driving the lamp tube 4 to move laterally along the threaded path in the detection chamber 2. The brightness sensor 32 detects the brightness of the lamp tube 4 through an electrical connection controller, and the shading plate 31 separates the lamp tube 4 into a brightness detection area and an area to be detected, thereby avoiding the brightness of the area to be detected from interfering with the brightness of the brightness detection area. The brightness of the brightness detection area is then detected by the brightness sensor 32, thereby realizing separate brightness detection of the lamp tube 4 in sections, thereby avoiding the interference of one section being too bright with the detection results of other sections.

[0031] See also Figure 3 and Figure 4 A second detection component 5 is also provided in the detection chamber 2, and the second detection component 5 includes a detection chamber 51 and a movable rod 52. The detection chamber 51 is provided with a slide groove, and the movable rod 52 is slidably connected to the slide groove. The detection chamber 51 is provided with a groove, and a spring 53 is provided in the groove. The two ends of the spring 53 respectively contact the upper and lower ends of the groove. The movable rod 52 passes through the groove and the spring 53. One end of the movable rod 52 extends out of the detection chamber 51 and is rotatably connected to a detection roller 54. The detection roller 54 is in contact with the outer wall of the lamp tube 4. A first marking assembly 6 is also provided in the detection chamber 2. The first marking assembly 6 includes a first extrusion plate 61 and a second extrusion plate 62. The first extrusion plate 61 and the second extrusion plate 62 are symmetrically arranged on the movable rod 52. A first chamber 63 is provided above the first extrusion plate 61, and a second chamber 64 is provided below the second extrusion plate 62. The first chamber 63 and the second chamber 64 are both air bags, and different colors of paint are provided in the two air bags. A marking tube 65 is provided at the rear end of the detection roller 54, and the outlet end of the marking tube 65 is vertically facing the lamp tube 4. A first channel 651 and a second channel 652 are provided in the marking tube 65. The first channel 651 is connected to the first chamber 63 through a pipeline, and the second channel 652 is connected to the second chamber 64 through a pipeline. It should be noted that when the lamp tube 4 does not enter the detection chamber 2, the screw rod is in contact with the detection roller 54, so that the first chamber 63 and the second chamber 64 will not be squeezed.

[0032] The specific working principle is: the detection roller 54 is pressed against the outer wall of the lamp tube 4. When the outer wall of the lamp tube 4 is convex, the movable rod 52 drives the first extrusion plate 61 to move upward, so that the first extrusion plate 61 squeezes the first chamber 63, so that the paint in the first chamber 63 is squeezed out from the first channel 651 and marked on the convex position of the lamp tube 4; when the outer wall of the lamp tube 4 is concave, the movable rod 52 drives the second extrusion plate 62 to move downward, so that the second extrusion plate 62 squeezes the second chamber 64, so that the paint in the second chamber 64 is squeezed out from the second channel 652 and marked on the concave position of the lamp tube 4.

[0033] A second marking assembly 7 is also provided in the detection chamber 2. The second marking assembly 7 includes a third chamber 71 and an electromagnet 72. The third chamber 71 is fixedly arranged on the free end of the movable rod 52. The first extrusion plate 61 is fixedly connected to the bottom of the third chamber 71. A piston 73 is provided in the third chamber 71. The piston 73 is provided with a permanent magnet 74 that cooperates with the electromagnet 72. The electromagnet 72 is arranged on the top of the third chamber 71. One end of the second extrusion plate 62 is fixedly connected to the piston 73. The piston 73 is connected to a return spring 75. The free end of the return spring 75 is connected to the third chamber 71. The third chamber 71 is connected to the first chamber 6 through a pipeline. 3 is connected with the second chamber 64, and a one-way valve is provided on the pipeline connecting the third chamber 71 with the first chamber 63 and the second chamber 64, so that the paint in the first chamber 63 and the second chamber 64 flows into the third chamber 71 in one direction; a fan blade 76 is provided in the third chamber 71 to mix the paint sucked into the first chamber 63 and the second chamber 64 more evenly; a third channel 653 is provided in the marking tube 65, and the third chamber 71 is connected with the third channel 653 through a pipeline, and a one-way valve is provided on the pipeline connecting the third chamber 71 with the third channel 653; the electromagnet 72 is electrically connected to the controller, and the controller is used to turn on and off the power of the electromagnet 72.

[0034] Specific working principle: when the detection unit detects that the brightness of the lamp tube 4 does not meet the standard brightness, the controller controls the electromagnet 72 to be energized, and the electromagnet 72 attracts the permanent magnet 74 and the piston 73 to move upward, so that a negative pressure is generated in the third chamber 71, and the paint in the first chamber 63 and the second chamber 64 is sucked into the third chamber 71, so that the two different colors of paint are mixed to form a third color of paint, and then the controller controls the electromagnet 72 to be de-energized, and the permanent magnet 74 loses the attraction of the electromagnet 72, and is reset under the drive of the reset spring 75, so that the piston 73 squeezes the paint in the third chamber 71, so that the paint in the third chamber 71 is squeezed out from the third channel 653 onto the lamp tube 4, thereby marking that the brightness of the lamp tube 4 does not meet the standard.

[0035] In order to better implement the above detection device, the present invention also provides a method for detecting the brightness of an LED lamp, including the application of an LED lamp brightness detection device, including the following steps: Step S10: feeding and placing the lamp tubes 4 manually into the feeding end of the feeding device, the feeding device arranges and places the lamp tubes 4 put in, and transports the lamp tubes 4 that have passed the inspection of the inspection device to the discharging end for discharging; Step S20: Brightness detection, the clamping ring 33 clamps the two ends of the lamp tube 4 and makes the joints contact with the terminals, the lamp tube 4 is energized, and then the hand wheel is turned to drive the lamp tube 4 to rotate into the detection chamber 2 through the screw rod 34, and the light shielding plate 31 divides the lamp tube 4 into detection areas, so that the brightness sensor 32 detects the brightness of the lamp tube 4 in sections; Step S30: Brightness marking. If the brightness sensor 32 detects that the brightness of the segment of the lamp tube 4 does not meet the standard, the controller controls the electromagnet 72 to switch on and off once, so as to suck the paint in the first chamber 63 and the second chamber 64 into the third chamber 71, and extrude the mixed paint through the third channel 653 onto the outer wall of the segment of the lamp tube 4. Step S40: Concave-convex detection. If the lamp tube 4 is normal, the detection roller 54 will not move up and down, and the paint in the first chamber 63 and the second chamber 64 will not be sprayed on the lamp tube 4; if the detection roller 54 drives the movable rod 52 to move upward, there will be a convexity on the outer wall of the surface lamp tube 4; if the detection roller 54 drives the movable rod 52 to move downward, there will be a concave on the outer wall of the surface lamp tube 4; Step S50: defect marking, when there is a bulge on the outer wall of the lamp tube 4, the first extrusion plate 61 moves upward to squeeze the first chamber 63, so that the paint in the first chamber 63 is squeezed out from the first channel 651 and sprayed on the lamp tube 4; when there is a depression on the outer wall of the lamp tube 4, the second extrusion plate 62 moves downward to squeeze the second chamber 64, so that the paint in the second chamber 64 is squeezed out from the second channel 652 and sprayed on the lamp tube 4; Step S60: Classify and return. If the lamp tube 4 passes the inspection of the first detection component 4 and the second detection component 5, the traction unit returns the lamp tube 4 to the feeding device; if the brightness of the lamp tube 4 does not meet the standard or has defects, the traction unit transports the lamp tube 4 to the defective warehouse.

[0036] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A LED lamp brightness detection device, comprising a detection device and a feeding device for feeding materials to the detection device, the detection device comprising a detection table (1) and a detection chamber (2), and further comprising a first detection component (3) arranged in the detection chamber (2), characterized in that: The first detection component (3) comprises: A traction unit, the traction unit is used to clamp and traction the lamp tube to move spirally in the detection chamber (2), the traction unit comprising a power supply module for supplying power to the terminals of the lamp tube (4); A detection unit, the detection unit is used to detect the brightness of a lamp tube (4), the detection unit comprises two symmetrically arranged shading plates (31), the shading plates (31) are provided with through holes matching the outer diameter of the lamp tube.

2. The LED lamp brightness detection device according to claim 1, characterized in that: The detection unit is a brightness sensor (32), and the brightness sensor (32) is electrically connected to a controller; the traction unit comprises a clamping ring (33), a connector for supplying power to a terminal of the lamp tube (4) is provided inside the clamping ring (33), the clamping ring (33) is connected to a screw rod (34), the screw rod (34) is connected to a driving component for driving the screw rod (34) to rotate, and the screw rod (34) is threadedly connected to a shell of the detection chamber (2).

3. The LED lamp brightness detection device according to claim 1, characterized in that: The invention also comprises a second detection component (5) arranged in the detection chamber (2), the second detection component (5) comprising a detection chamber (51) and a movable rod (52), the movable rod (52) being slidably arranged in the detection chamber (51), the movable rod (52) being provided with a spring (53) for resetting the movable rod (52), one end of the movable rod (52) extending out of the detection chamber (51) and being rotatably connected to a detection roller (54), the detection roller (54) being in contact with the outer wall of the lamp tube (4); and a first marking component (6), the marking component (6) being used to mark the concave and convex of the outer wall of the lamp tube (4) according to the extension and retraction of the movable rod (52).

4. The LED lamp brightness detection device according to claim 3, characterized in that: The first marking assembly (6) comprises a first extrusion plate (61) and a second extrusion plate (62), the first extrusion plate (61) and the second extrusion plate (62) being symmetrically arranged on the movable rod (52), a first chamber (63) being arranged above the first extrusion plate (61), and a second chamber (64) being arranged below the second extrusion plate (62), the first chamber (63) and the second chamber (64) being both flexible chambers, the first chamber (63) and the second chamber (64) being provided with coatings of different colors, a marking tube (65) being arranged at the rear end of the detection roller (54), a first channel (651) and a second channel (652) being arranged in the marking tube (65), the first channel (651) being connected to the first chamber (63) through a pipe, and the second channel (652) being connected to the second chamber (64) through a pipe.

5. The LED lamp brightness detection device according to claim 4, characterized in that: The invention also comprises a second marking assembly (7), the second marking assembly (7) comprising a third chamber (71) and an electromagnet (72), a piston (73) being arranged in the third chamber (71), a permanent magnet (74) cooperating with the electromagnet (72) being arranged on the piston (73), a return spring (75) being connected to the piston (73), a free end of the return spring (75) being connected to the third chamber (71), the third chamber (71) being connected to the first chamber (63) and the second chamber (64) through a pipeline, a third passage (653) being arranged in the marking tube (65), the third chamber (71) being connected to the third passage (653) through a pipeline; the electromagnet (72) being electrically connected to a controller, the controller being used to switch the electromagnet (72) on and off.

6. The LED lamp brightness detection device according to claim 5, characterized in that: One end of the second extrusion plate (62) is fixedly connected to the piston (73), the first extrusion plate (61) is fixedly connected to the bottom of the third chamber (71), and the third chamber (71) is fixedly arranged on the free end of the movable rod (52).

7. The LED lamp brightness detection device according to claim 5, characterized in that: The third chamber (71) is provided with a fan blade (76).

8. The LED lamp brightness detection device according to claim 6, characterized in that: A slide groove is provided in the detection chamber (51), and the movable rod (52) is slidably connected to the slide groove; a guide groove is provided in the third chamber (71), and the second extrusion plate (62) is slidably connected to the guide groove.

9. The LED lamp brightness detection device according to claim 6, characterized in that: A one-way valve is provided on the pipeline connecting the third chamber (71) with the first chamber (63) and the second chamber (64); and a one-way valve is provided on the pipeline connecting the third chamber (71) with the third passage (653).

10. A method for detecting brightness of an LED lamp, comprising applying an LED lamp brightness detection device as claimed in claims 1 to 9, characterized in that: The steps include: Step S10: feeding and placing the lamp tubes (4) manually into the feeding end of the feeding device, the feeding device arranges and places the lamp tubes (4) put in, and transports the lamp tubes (4) that have passed the inspection by the inspection device to the discharging end for discharging; Step S20: brightness detection, the clamping ring (33) clamps the two ends of the lamp tube (4) and makes the joints contact with the terminals, the lamp tube (4) is energized, and then the hand wheel is rotated to drive the lamp tube (4) to rotate into the detection chamber (2) through the screw rod (34), and the light shielding plate (31) divides the lamp tube (4) into detection areas, so that the brightness sensor (32) detects the brightness of the lamp tube (4) in sections; Step S30: brightness marking. If the brightness sensor (32) detects that the brightness of the section of the lamp tube (4) does not meet the standard, the controller controls the electromagnet (72) to switch on and off once, thereby sucking the paint in the first chamber (63) and the second chamber (64) into the third chamber (71), and squeezing the mixed paint through the third channel (653) onto the outer wall of the section of the lamp tube (4); Step S40: convex-concave detection. If the lamp tube (4) is normal, the detection roller (54) will not move up and down, and the paint in the first chamber (63) and the second chamber (64) will not be sprayed on the lamp tube (4); if the detection roller (54) drives the movable rod (52) to move upward, a convexity will be present on the outer wall of the surface lamp tube (4); if the detection roller (54) drives the movable rod (52) to move downward, a concaveity will be present on the outer wall of the surface lamp tube (4); Step S50: defect marking, when a bulge exists on the outer wall of the lamp tube (4), the first extrusion plate (61) moves upward to extrude the first chamber (63), so that the paint in the first chamber (63) is squeezed out from the first channel (651) and sprayed on the lamp tube (4); when a dent exists on the outer wall of the lamp tube (4), the second extrusion plate (62) moves downward to extrude the second chamber (64), so that the paint in the second chamber (64) is squeezed out from the second channel (652) and sprayed on the lamp tube (4); Step S60: Classify and return. If the lamp tube (4) passes the inspection of the first inspection component (4) and the second inspection component (5), the traction unit returns the lamp tube (4) to the feeding device; if the brightness of the lamp tube (4) does not meet the standard or is defective, the traction unit transports the lamp tube (4) to the defective warehouse.

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