A multi-color multi-channel folded light path detection light source

Abstract

The application relates to the technical field of optical detection, and discloses a multi-color multi-channel folded light path detection light source, which comprises a shell, a first reflector, a second reflector and two first light sources are installed in the shell; a second light source is arranged at the top of the shell, the second light source comprises a mounting cover connected to the top of the shell, a top lamp and two side lamps are hinged in the mounting cover; the second light source further comprises a movable assembly; a blowing assembly is further arranged and used for removing dust on the first reflector and the second reflector in a blowing mode. Through the cooperative work of the first reflector, the second reflector, the two first light sources and the second light source, the comprehensive performance of the optical detection system is significantly improved, the two first light sources are mirror-imaged, the flexible adjustment of the second light source is combined, a three-dimensional illumination system is constructed, the defect contrast is strengthened while the shadow blind area is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical detection technology, and in particular to a multi-color multi-channel folded light path detection light source. BACKGROUND

[0002] In the field of machine vision detection, optical detection technology is to collect the surface image of the object through the optical system, and to identify defects by combining image processing algorithms. It has been widely used in quality control of precision manufacturing fields such as 3C products. Its core principle is to use a light source to irradiate the measured object, so that the surface defects and normal areas of the object form a light and shade or gray difference. Then, the camera captures the image, and the algorithm analysis realizes the identification and judgment of defects. The optical detection system is mainly composed of optical imaging equipment and detection light source. Among them, the detection light source is the source of light of the optical detection system, which directly determines the contrast, definition and defect recognition of the image. Its performance directly affects the accuracy and efficiency of subsequent defect detection.

[0003] However, in the prior art, the following problems exist:

[0004] The conventional optical detection system usually adopts a single light path, which is difficult to simultaneously meet the requirements of high resolution and multi-angle illumination. When detecting a special-shaped object to be detected, some small defects may be missed due to incomplete coverage of the light illumination angle. In addition, the angle of the conventional light source is usually fixedly set and cannot dynamically adapt to the object to be detected with complex surface characteristics, so that the recognition rate of small defects is low. SUMMARY

[0005] The purpose of the present application is to solve the above problems and provide a multi-color multi-channel folded light path detection light source to overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above purpose, the present application provides the following technical solutions:

[0007] The multi-color multi-channel folded light path detection light source provided by the present application comprises a shell, a first reflector, a second reflector and two first light sources installed in the shell, a second light source provided on the top of the shell, the second light source comprising a mounting cover connected to the top of the shell, a top lamp and two side lamps hinged in the mounting cover, an activity assembly comprising a sliding rod, two connecting rods hinged to the sliding rod, the two connecting rods being hinged to the two side lamps at the ends away from the sliding rod, the sliding rod being capable of swinging the two side lamps through the two connecting rods when moving up and down, and a blowing assembly for removing dust on the first reflector and the second reflector by blowing.

[0008] As preferred, the two first light sources are mirror-imaged, a detection channel is arranged between the two first light sources, the second light source is arranged above the detection channel, the first mirror is arranged below the second light source, the second mirror is arranged on the projection path of the first mirror, a detection camera is arranged on the top of the mounting cover, and the detection camera is arranged above the second mirror.

[0009] As preferred, the first mirror is a semi-transparent and semi-reflective mirror, the second mirror is a reflective mirror, the image of the object to be detected is reflected to the second mirror through the first mirror, and the detection camera collects the image information reflected by the second mirror.

[0010] As preferred, the movable assembly further comprises a first motor, the first motor is mounted on the mounting cover, a cam is connected to the output end of the first motor, a door-shaped frame is connected to the slide rod, the cam is arranged on the inner side of the door-shaped frame, and the cam can drive the slide rod to move up and down reciprocatingly through the door-shaped frame when the cam rotates.

[0011] As preferred, the movable assembly further comprises a light rod and two convex plates, a connecting rod is connected to the slide rod, the light rod is connected to one end of the connecting rod away from the slide rod, the two convex plates are connected to the side wall of the top light, the light rod is arranged between the two convex plates, and the light rod can drive the top light to swing reciprocatingly through the two convex plates when the light rod moves up and down reciprocatingly.

[0012] As preferred, the blowing assembly comprises two wind covers, the two wind covers are arranged in the mounting cover, pistons are slidably connected to the inner walls of the two wind covers respectively, a plug rod is connected between the two pistons, the plug rod penetrates through the two wind covers at two ends respectively, a sliding groove is arranged on the plug rod, a sliding shaft is connected to the cam, the sliding groove is arranged longitudinally, the sliding shaft is arranged eccentrically on the cam, the sliding shaft is slidably connected to the sliding groove, and the sliding shaft can drive the plug rod to move left and right reciprocatingly through the sliding groove when the sliding shaft rotates with the cam, air inlet pipes and air outlet pipes are connected to the wind covers, first and second jet covers are mounted in the housing, and the two air outlet pipes are connected to the first and second jet covers respectively.

[0013] As preferred, the wind cover and the plug rod are arranged in a sealed manner, one-way valves are arranged in the air inlet pipes and the air outlet pipes respectively, jet grooves are arranged in the first and second jet covers respectively, the jet groove of the first jet cover faces the second mirror, and the jet groove of the second jet cover faces the first mirror.

[0014] As preferred, a dust removal assembly is further included, which comprises a mounting box mounted on the side of the shell away from the first air jet cover, a driving roller and a driven roller are rotatably mounted in the mounting box, a second motor is connected to the outer wall of the mounting box, the output end of the second motor is connected with the driving roller, a suction belt is sleeved on the outer wall of the driving roller and the driven roller, the driving roller can drive the suction belt to move in a circulation manner when the driving roller rotates, the suction belt is made of a material easy to absorb dust, and the suction belt is located at the lower air outlet of the first air jet cover and the second air jet cover.

[0015] As preferred, a movable rod is slidably connected to the mounting box, a scraper is connected to the movable rod, the scraper is in contact with the side of the suction belt away from the first air jet cover, a fork rod is connected to the movable rod, a bevel gear is connected to the end of the driving roller away from the second motor, a notch is arranged on the fork rod, and a part of the bevel gear is located in the notch of the fork rod, the bevel gear can drive the fork rod to reciprocatingly move through the notch when the bevel gear rotates.

[0016] The beneficial effects are that:

[0017] 1. The multi-color multi-channel folded light path detection light source significantly improves the comprehensive performance of the optical detection system through the cooperative work of the first reflector, the second reflector, the two first light sources and the second light source. The two first light sources are mirror-imaged, combined with the flexible adjustment of the second light source, a three-dimensional illumination system is constructed, which avoids the shadow blind area while strengthening the defect contrast. The first reflector realizes synchronous acquisition of double light paths, improves the light energy utilization rate, and the second reflector efficiently reflects the image light to ensure the clarity. The whole can detect the small defects on the surface of the detected object with high precision and high speed, adapt to complex structures, and balance precision, efficiency and adaptability, thereby reducing the missed detection rate.

[0018] 2. The multi-color multi-channel folded light path detection light source, through the setting of the movable assembly, the top light and the two side lights can reciprocatingly swing when the detected object is detected, so as to achieve the technical effect that the light generated by the second light source can change the angle constantly. Through the dynamic adjustment of the illumination angle, the light and shadow contrast of the defect area is strengthened, thereby improving the recognition rate of the small defects and improving the detection precision.

[0019] 3. The multi-color multi-channel folded light path detection light source, through the setting of the blowing assembly, the air jet grooves of the first air jet cover and the second air jet cover are accurately directed to the second reflector and the first reflector respectively. The first air jet cover and the second air jet cover blow the second reflector and the first reflector by alternately blowing air, efficiently remove dust and impurities, avoid the influence of dust on the light path propagation precision and image clarity, and ensure the reliability of the detection result.

[0020] 4. The multi-color multi-channel folded light path detection light source, through the setting of the dust removal assembly, the adsorption belt can efficiently adsorb the dust in the airflow blown by the blowing assembly, and the dust is prevented from re-floating to the surface of the first reflector, the second reflector or the inside of the shell, through the setting of the scraper, the scraper can scrape the adsorbed dust and impurities on the adsorption belt by reciprocating movement, and the adsorption capacity of the adsorption belt is prevented from being reduced due to excessive dust accumulation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the first light source structure of the present application;

[0024] Figure 3 is a schematic diagram of the second light source structure of the present application;

[0025] Figure 4 is a schematic diagram of the movable assembly structure of the present application;

[0026] Figure 5 is a schematic diagram of the light rod structure of the present application;

[0027] Figure 6 is a schematic diagram of the blowing assembly structure of the present application;

[0028] Figure 7 is a schematic diagram of the plug rod structure of the present application;

[0029] Figure 8 is a schematic diagram of the second air jet cover structure of the present application;

[0030] Figure 9 is a schematic diagram of the air cover structure of the present application;

[0031] Figure 10 is a schematic diagram of the dust removal assembly structure of the present application;

[0032] Figure 11 is a schematic diagram of the mounting structure of the present application;

[0033] Figure 12 is a schematic diagram of the scraper structure of the present application.

[0034] The reference signs are explained as follows:

[0035] 1, shell;

[0036] 2, first light source;

[0037] 3, second light source; 31, mounting cover; 32, side light; 33, top light;

[0038] 4, first mirror;

[0039] 5, second mirror;

[0040] 6, movable assembly; 61, first motor; 62, cam; 63, slide rod; 64, door type frame; 65, connecting rod; 66, connecting rod; 67, light rod; 68, convex plate;

[0041] 7, blowing assembly; 71, fan cover; 72, plug rod; 73, piston; 74, sliding slot; 75, sliding shaft; 76, air inlet pipe; 77, exhaust pipe; 78, first jet cover; 79, second jet cover;

[0042] 8, dust removal assembly; 81, mounting box; 82, driving roller; 83, driven roller; 84, second motor; 85, adsorption belt; 86, movable rod; 87, scraper; 88, fork rod; 89, inclined wheel. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0044] An embodiment of the present application is:

[0045] Please refer to Figure 1 - Figure 3 A multi-color multi-channel folded light path detection light source, comprising: a shell 1, the shell 1 is provided with a first mirror 4, a second mirror 5 and two first light sources 2; the top of the shell 1 is provided with a second light source 3, the second light source 3 comprises a mounting cover 31, the mounting cover 31 is connected to the top of the shell 1, the mounting cover 31 is hingedly connected with a top light 33 and two side lights 32; the shell 1 can play a certain anti-light interference role, guaranteeing the detection stability, the installation positions of the first mirror 4, the second mirror 5 and the two first light sources 2 in the shell 1 are precisely calibrated to ensure that the light path propagation path meets the design requirements, the hinged structure of the top light 33 and the two side lights 32 allows the top light 33 and the side lights 32 to be flexibly adjusted in the irradiation angle, thereby forming a multi-angle light source.

[0046] The two first light sources 2 are mirror-imaged, a detection channel is arranged between the two first light sources 2, the second light source 3 is located above the detection channel, the first reflector 4 is located below the second light source 3, the second reflector 5 is located on the projection line of the first reflector 4, the detection camera is installed at the top of the mounting cover 31, the detection camera is located above the second reflector 5, the first reflector 4 is a semi-transparent and semi-reflective mirror, the second reflector 5 is a reflective mirror, the image of the object to be detected is reflected to the second reflector 5 through the first reflector 4, and the detection camera collects the image information reflected by the second reflector 5; the two first light sources 2 mirror-imaged form a symmetrical illumination field, ensuring that the surface of the object to be detected in the detection channel is uniformly illuminated, avoiding the shadow blind area caused by the single-sided light source, the second light source 3 is located above the detection channel, supplementing the illumination from the top and forming a three-dimensional illumination system with the two first light sources 2, and the light and shadow contrast of the micro defect is strengthened, the first reflector 4 is located below the second light source 3, which can receive the reflected light of the object to be detected and also can transmit part of the light of the second light source 3, realizing the light path turning while ensuring the light energy utilization rate, and the semi-transparent and semi-reflective characteristics of the first reflector 4 enable the direct light path and the reflected light path to act synchronously, improving the richness of the image information. The second reflector 5 is accurately located on the projection line of the first reflector 4, can efficiently reflect the image light reflected by the first reflector 4 to the detection camera, the detection camera vertically receives the reflected light, and after the collected image information is processed by a subsequent algorithm, the surface defects of the object to be detected can be quickly identified, realizing high-precision and high-speed detection.

[0047] Through the cooperative work of the first reflector 4, the second reflector 5, the two first light sources 2 and the second light source 3, the comprehensive performance of the optical detection system is significantly improved, the two first light sources 2 are mirror-imaged, combined with the flexible adjustment of the second light source 3, a three-dimensional illumination system is constructed, the defect contrast is strengthened while avoiding the shadow blind area, the first reflector 4 realizes synchronous collection of double light paths, improves the light energy utilization rate, the second reflector 5 efficiently reflects the image light to ensure the definition, and the whole can detect the micro defect on the surface of the object to be detected with high precision and high speed, adapt to complex structure, and balance the precision, efficiency and adaptability, and reduce the missed detection rate.

[0048] On the basis of the above embodiment, another embodiment of the present application is:

[0049] Please refer to Figure 1 - Figure 5The second light source 3 further comprises a movable assembly 6, the movable assembly 6 comprises a slide rod 63, two connecting rods 65 are hinged on the slide rod 63, the two connecting rods 65 are hinged with the two side lamps 32 at the ends away from the slide rod 63 respectively, the slide rod 63 can drive the two side lamps 32 to swing through the two connecting rods 65 when the slide rod 63 moves up and down, the movable assembly 6 further comprises a first motor 61, the first motor 61 is installed on the mounting cover 31, the output end of the first motor 61 is connected with a cam 62, a door-shaped frame 64 is connected on the slide rod 63, the cam 62 is located on the inner side of the door-shaped frame 64, the cam 62 can drive the slide rod 63 to move up and down reciprocatingly through the door-shaped frame 64 when the cam 62 rotates; the first motor 61 drives the cam 62 to rotate after being started, the eccentric structure of the cam 62 makes the door-shaped frame 64 generate up and down reciprocating displacement with the rotation of the cam 62, and then drives the slide rod 63 to move up and down along a fixed direction, the up and down movement of the slide rod 63 is transmitted to the two side lamps 32 through the two hinged connecting rods 65, converts the linear motion into the swinging action of the side lamps 32, and realizes the dynamic adjustment of the irradiation angle of the side lamps 32.

[0050] Further, the movable assembly 6 further comprises a light rod 67 and two flanges 68, a connecting rod 66 is connected on the slide rod 63, the light rod 67 is connected at the end of the connecting rod 66 away from the slide rod 63, the two flanges 68 are both connected on the side wall of the ceiling lamp 33, the light rod 67 is located between the two flanges 68, the light rod 67 can drive the ceiling lamp 33 to swing reciprocatingly through the two flanges 68 when the light rod 67 moves up and down reciprocatingly; the slide rod 63 moves up and down reciprocatingly, and synchronously drives the light rod 67 to move up and down reciprocatingly through the connecting rod 66, since the light rod 67 is located between the two flanges 68, the light rod 67 will alternately apply force to the two flanges 68 when the light rod 67 moves up and down, and then pushes the ceiling lamp 33 to swing reciprocatingly around the hinged point, realizes the dynamic adjustment of the irradiation angle of the ceiling lamp 33, through the setting of the movable assembly 6, the ceiling lamp 33 and the two side lamps 32 can swing reciprocatingly when the to-be-detected object is detected, so that the technical effect that the light generated by the second light source 3 can change the angle constantly is achieved, the light and shadow contrast of the defect area is strengthened through the dynamic adjustment of the illumination angle, and then the recognition rate of the micro defect is improved and the detection precision is improved.

[0051] On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0052] Please refer to Figure 2 , Figure 6 - Figure 9Further comprising a blowing assembly 7 for removing dust on the first mirror 4 and the second mirror 5 by blowing, the blowing assembly 7 comprises two air hoods 71, both of which are installed in the mounting hood 31, the inner walls of the two air hoods 71 are respectively slidably connected with pistons 73, the two pistons 73 are connected with a plug rod 72, both ends of the plug rod 72 respectively penetrate through the two air hoods 71, a sliding groove 74 is formed in the plug rod 72, a sliding shaft 75 is connected with the cam 62, the sliding groove 74 is longitudinally arranged, the sliding shaft 75 is eccentrically arranged on the cam 62, the sliding shaft 75 is slidably connected with the sliding groove 74, when the sliding shaft 75 rotates with the cam 62, the plug rod 72 can be driven to move back and forth by the sliding groove 74, the air hoods 71 are connected with an air inlet pipe 76 and an air outlet pipe 77, the housing 1 is installed with a first air jet cover 78 and a second air jet cover 79, the two air outlet pipes 77 are respectively connected with the first air jet cover 78 and the second air jet cover 79, the air hoods 71 and the plug rod 72 are sealingly arranged, the air inlet pipe 76 and the air outlet pipe 77 are respectively provided with a one-way valve, the first air jet cover 78 and the second air jet cover 79 are respectively provided with an air jet groove, the air jet groove of the first air jet cover 78 faces the second mirror 5, and the air jet groove of the second air jet cover 79 faces the first mirror 4.

[0053] The blowing assembly 7 and the moving assembly 6 share the cam 62 as a power source, when the cam 62 rotates, the eccentrically arranged sliding shaft 75 rotates synchronously, in the longitudinal sliding groove 74, the sliding shaft 75 converts the rotary motion into the back and forth linear motion of the plug rod 72, and the pistons 73 connected with both ends of the plug rod 72 slide in the air hoods 71 along with the plug rod 72, the sealing arrangement of the air hoods 71 and the plug rod 72 ensures the air cavity sealing, in cooperation with the one-way valves in the air inlet pipe 76 and the air outlet pipe 77, the air flow is realized in one direction, for example, when the plug rod 72 moves to the right, the piston 73 in the right air hood 71 performs a squeezing action, the air in the right air hood 71 is transported to the first air jet cover 78 through the air outlet pipe 77 by the positive pressure, the first air jet cover 78 sprays the air through the air jet groove, so that the air uniformly blows over the surface of the second mirror 5, and then blows off the dust, at the same time, the piston 73 in the left air hood 71 performs a suction action, so that the left air hood 71 sucks in air through the air inlet pipe 76 for replenishment, similarly, when the plug rod 72 moves to the left, the left air hood 71 transports the air to the second air jet cover 79 through the air outlet pipe 77, the second air jet cover 79 sprays the air through the air jet groove, so that the air uniformly blows over the surface of the first mirror 4, and the right air hood 71 sucks in air through the air inlet pipe 76, through the arrangement of the blowing assembly 7, the air jet grooves of the first air jet cover 78 and the second air jet cover 79 are respectively accurately directed to the second mirror 5 and the first mirror 4, the first air jet cover 78 and the second air jet cover 79 blow off the second mirror 5 and the first mirror 4 by the way of alternately spraying air, efficiently remove dust and impurities, avoid dust affecting the light path propagation accuracy and image clarity, and ensure the reliability of the detection result.

[0054] On the basis of the above-mentioned embodiments, another embodiment of the present application is:

[0055] Please refer to Figure 2 、 Figure 10 - Figure 12 Further comprising a dust removal assembly 8, the dust removal assembly 8 comprises a mounting box 81 mounted on the side of the shell 1 away from the first air jet cover 78, a driving roller 82 and a driven roller 83 are rotatably mounted in the mounting box 81, a second motor 84 is connected to the outer wall of the mounting box 81, the output end of the second motor 84 is connected with the driving roller 82, and an adsorption belt 85 is sleeved on the outer wall of the driving roller 82 and the driven roller 83, the driving roller 82 can drive the adsorption belt 85 to move circularly when rotating, the adsorption belt 85 is made of easy-to-dust material, and the adsorption belt 85 is located at the lower air outlet of the first air jet cover 78 and the second air jet cover 79; the mounting position of the mounting box 81 accurately corresponds to the lower air outlet of the first air jet cover 78 and the second air jet cover 79, so that the dust-carrying airflow generated by blowing can be directly guided to the adsorption belt 85, the second motor 84 drives the driving roller 82 to rotate after being started, the driving roller 82 drives the adsorption belt 85 to move circularly through friction, and the driven roller 83 rotates synchronously, so as to ensure that the adsorption belt 85 moves stably, the air carried with dust after being sprayed out of the first air jet cover 78 and the second air jet cover 79 contacts the adsorption belt 85, the adsorption belt 85 made of easy-to-dust material can efficiently adsorb the dust and impurities carried in the airflow, so as to avoid the dust from being scattered to the surface of the first reflector 4 and the second reflector 5 or the inside of the shell 1 again, and the adsorption belt 85 moving circularly can constantly replace the contact surface with the airflow, so as to ensure the adsorption effect.

[0056] It is worth mentioning that the installation box 81 is slidably connected with the movable rod 86, the movable rod 86 is connected with the scraper 87, the scraper 87 is in contact with the side of the adsorption belt 85 away from the first air jet cover 78, the movable rod 86 is connected with the fork rod 88, the driven roller 82 is connected with the bevel gear 89 away from the second motor 84, the fork rod 88 is provided with a notch, and a part of the bevel gear 89 is located in the notch of the fork rod 88, so that the bevel gear 89 can drive the fork rod 88 to reciprocatingly move when rotating; the driven roller 82 drives the bevel gear 89 to synchronously rotate when rotating, the bevel gear 89 is obliquely arranged, the edge of the bevel gear 89 is matched with the notch of the fork rod 88, so as to convert the rotary motion into the reciprocating linear motion of the fork rod 88, and further drive the movable rod 86 to reciprocatingly slide on the installation box 81, the scraper 87 on the movable rod 86 is always in contact with the surface of the adsorption belt 85, the scraper 87 is located at the back of the contact surface of the adsorption belt 85 and the dust, and the scraper 87 can efficiently scrape off the dust and impurities adsorbed on the adsorption belt 85 in the reciprocating sliding process, so that the adsorption capacity of the adsorption belt 85 is prevented from being reduced due to too much dust accumulation, and the installation box 81 is provided with an opening at the position of the scraper 87, so that the dust scraped off by the scraper 87 can directly fall out of the installation box 81 and then be discharged to the outside of the shell 1, through the setting of the dust removal assembly 8, the adsorption belt 85 can efficiently adsorb the dust in the air flow blown out by the blowing assembly 7, and the dust is prevented from re-floating to the surfaces of the first reflector 4 and the second reflector 5 or the inside of the shell 1, through the setting of the scraper 87, the scraper 87 can scrape off the dust and impurities adsorbed on the adsorption belt 85 by reciprocating movement, and the adsorption capacity of the adsorption belt 85 is prevented from being reduced due to too much dust accumulation.

[0057] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-color, multi-channel refracting optical path detection light source, characterized in that, Include: The shell (1), the first mirror (4), the second mirror (5) and two first light sources (2) are installed in the shell (1); The second light source (3) is arranged on the top of the shell (1), the second light source (3) comprises a mounting cover (31), the mounting cover (31) is connected on the top of the shell (1), the top lamp (33) and two side lamps (32) are hinged in the mounting cover (31); The second light source (3) further comprises a movable assembly (6), the movable assembly (6) comprises a sliding rod (63), two connecting rods (65) are hinged on the sliding rod (63), the two connecting rods (65) are hinged with two side lamps (32) respectively at the end away from the sliding rod (63), the sliding rod (63) can drive two side lamps (32) to swing through two connecting rods (65) when moving up and down; It also includes a blowing assembly (7) for removing dust on the first mirror (4) and the second mirror (5) by blowing; The movable assembly (6) further comprises a first motor (61), the first motor (61) is installed on the mounting cover (31), the output end of the first motor (61) is connected with a cam (62); The blowing assembly (7) comprises two wind covers (71), two wind covers (71) are installed in the mounting cover (31), the inner wall of two wind covers (71) is slidably connected with a piston (73), the piston (73) is connected between two wind covers (71), the both ends of the piston (72) are respectively penetrated through two wind covers (71), the piston (72) is provided with a sliding groove (74), the cam (62) is connected with a sliding shaft (75), the sliding groove (74) is longitudinally arranged, the sliding shaft (75) is eccentrically arranged on the cam (62), the sliding shaft (75) is slidably connected with the sliding groove (74), when the sliding shaft (75) rotates with the cam (62), the piston (72) can be driven to move back and forth by the sliding groove (74), the wind cover (71) is connected with an air inlet pipe (76) and an air outlet pipe (77), the shell (1) is provided with a first air jet cover (78) and a second air jet cover (79), two air outlet pipes (77) are connected with the first air jet cover (78) and the second air jet cover (79) respectively.

2. A multi-color multi-pass folded light path detection light source as claimed in claim 1, characterized in that: Two first light sources (2) are mirror image arranged, a detection channel is arranged between two first light sources (2), the second light source (3) is located above the detection channel, the first mirror (4) is located below the second light source (3), the second mirror (5) is located on the projection line of the first mirror (4), a detection camera is installed on the top of the mounting cover (31), and the detection camera is located above the second mirror (5).

3. A multi-colour multi-pass folded optical path light source according to claim 2, wherein: The first mirror (4) is a semi-transparent mirror, the second mirror (5) is a mirror, the image of the object to be detected is reflected to the second mirror (5) through the first mirror (4), and the detection camera collects the image information reflected by the second mirror (5).

4. The multi-color multi-pass folded light path detection light source of claim 1, wherein: The sliding rod (63) is connected with a door-shaped frame (64), the cam (62) is located at the inner side of the door-shaped frame (64), and the cam (62) can drive the sliding rod (63) to move up and down reciprocatingly through the door-shaped frame (64) when the cam (62) rotates.

5. A multi-colour multi-pass folded optical path light source as claimed in claim 4, wherein: The movable assembly (6) further comprises a light rod (67) and two protruding plates (68), the sliding rod (63) is connected with a connecting rod (66), the light rod (67) is connected at one end of the connecting rod (66) away from the sliding rod (63), the two protruding plates (68) are both connected to the side wall of the ceiling lamp (33), the light rod (67) is located between the two protruding plates (68), and the light rod (67) can drive the ceiling lamp (33) to swing reciprocatingly through the two protruding plates (68) when the light rod (67) moves up and down reciprocatingly.

6. A multi-colour multi-pass folded optical path detection light source as claimed in claim 1, wherein: The air cover (71) and the plug rod (72) are in sealing arrangement, one-way valves are arranged in the air inlet pipe (76) and the air outlet pipe (77) respectively, the first air jet cover (78) and the second air jet cover (79) are respectively provided with air jet grooves, the air jet groove of the first air jet cover (78) faces the second reflector (5), and the air jet groove of the second air jet cover (79) faces the first reflector (4).

7. The multi-color multi-pass folded optical path detection light source of claim 1, wherein: Further comprising a dust removal assembly (8), the dust removal assembly (8) comprises a mounting box (81), the mounting box (81) is mounted on the side of the shell (1) away from the first air jet cover (78), the driving roller (82) and the driven roller (83) are rotatably installed in the mounting box (81), the second motor (84) is connected to the outer wall of the mounting box (81), the output end of the second motor (84) is connected with the driving roller (82), the driving roller (82) and the driven roller (83) are sleeved with the adsorption belt (85), the driving roller (82) can drive the adsorption belt (85) to move circularly when the driving roller (82) rotates, the adsorption belt (85) is made of easy-to-dust material, and the adsorption belt (85) is located at the lower air inlet of the first air jet cover (78) and the second air jet cover (79).

8. A multi-colour multi-pass folded optical path light source according to claim 7, wherein: The mounting box (81) is slidably connected with a movable rod (86), the movable rod (86) is connected with a scraper (87), the scraper (87) is in contact with the side of the adsorption belt (85) away from the first air jet cover (78), the movable rod (86) is connected with a fork rod (88), one end of the driving roller (82) away from the second motor (84) is connected with an inclined wheel (89), the fork rod (88) is provided with a notch, and part of the inclined wheel (89) is located in the notch of the fork rod (88), and the inclined wheel (89) can drive the fork rod (88) to move reciprocatingly through the notch when the inclined wheel (89) rotates.

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