Needle column detection device and system

Abstract

The utility model embodiment provides a kind of needle column detection device and system, needle column detection device includes bottom plate, camera, lens, parallel coaxial light source and platform;Camera is installed in the first side of bottom plate, for the image of the needle column to be detected is collected;Platform is installed in the second side opposite with camera of bottom plate, for placing the needle column to be detected;Lens is installed on the light receiving end of camera towards platform, for receiving the light that is parallel to the optical axis of camera after being reflected by needle column end face, filter out the light that is not parallel to the optical axis of camera;Parallel coaxial light source is installed on bottom plate, between lens and platform, for emitting parallel irradiation light parallel to the optical axis of camera towards the needle column end face to be detected.The area image at the position of skew needle column will be very dark, the area image at the position of normal needle column will be very bright, thus forming obvious gray difference, improve the detection effect of needle column detection.

Description

Technical Field

[0001] This utility model relates to the field of machine vision technology, and in particular to a needle column detection device and system. Background Technology

[0002] Currently, many electronic components are equipped with pins, such as toroidal magnetic cores and connectors that use pins to connect to slots.

[0003] To ensure that the pins are at the correct angle, thereby guaranteeing their function and connection stability, pin skew detection is generally required in the production of electronic components, such as for pins in toroidal magnetic cores.

[0004] The main technical challenge in detecting the misalignment of the pin column in a toroidal magnetic core lies in the fact that the pin column diameter is very small and the tilt angle of the defective pin column is very small, making it difficult to observe with the naked eye and easy to miss.

[0005] Machine vision-based inspection methods are divided into 3D vision inspection and 2D vision inspection. 3D vision inspection typically uses a 3D camera to acquire information about the surface of the needle post and calculates the tilt angle of the needle post based on the height data to determine whether it is skewed. Theoretically, this method can directly obtain an accurate tilt angle of the needle post. However, because the diameter of the needle post is very small and the tilt angle of the defective needle post is also very small, there is no obvious height difference between the skewed needle post and the normal needle post, making it difficult for the 3D camera to detect the skewed feature.

[0006] 2D visual inspection methods determine defects based on the difference in reflected light paths between normal and skewed needle end faces. However, the needle tilt angle is very small, and traditional bright-field and dark-field illumination methods illuminate from the side of the needle being inspected, creating an angle. This makes it difficult for the camera to highlight the skewed features in the captured image, resulting in no significant grayscale difference between the defective and normal areas, making the imaging quality unsatisfactory for inspection requirements. Utility Model Content

[0007] The purpose of this utility model embodiment is to provide a needle column detection device and system to improve the detection effect of needle columns. The specific technical solution is as follows:

[0008] A needle column detection device includes: a base plate, a camera, a lens, a parallel coaxial light source, and a stage;

[0009] The camera is mounted on the first side of the base plate and is used to acquire images of the needle column being detected.

[0010] The stage is installed on the second side of the base plate opposite to the camera and is used to place the probe to be detected.

[0011] The lens is mounted on the camera and faces the stage as a light receiving end. It is used to receive light rays that are parallel to the camera's optical axis after being reflected by the end face of the pin column, and to filter out light rays that are not parallel to the camera's optical axis.

[0012] The parallel coaxial light source is mounted on the base plate and located between the lens and the stage, and is used to emit parallel illumination light parallel to the camera optical axis toward the end face of the probe being tested.

[0013] In some embodiments, the lens is a double telecentric lens or an object-side telecentric lens.

[0014] In some embodiments, it further includes: a camera fine-tuning mechanism;

[0015] The camera is mounted on the first side of the base plate along its length direction based on the camera fine-tuning mechanism.

[0016] The bottom of the camera fine-tuning mechanism is mounted on the base plate, and the top of the camera fine-tuning mechanism is fixedly connected to the camera. The camera fine-tuning mechanism is used to adjust the camera and the lens along the length direction and the width direction of the base plate.

[0017] In some embodiments, the camera fine-tuning mechanism includes a first adjustment block and a second adjustment block;

[0018] The bottom of the first adjusting block is slidably connected to the base plate along the length of the base plate, so as to drive the camera and lens to slide along the length of the base plate;

[0019] The top of the second adjustment block is fixedly connected to the camera, and the bottom of the second adjustment block is slidably connected to the top of the first adjustment block along the width direction of the base plate, so as to drive the camera and the lens to slide along the width direction of the base plate.

[0020] In some embodiments, the bottom of the second adjusting block is provided with a second adjusting block groove, and two bottom guide blocks of the second adjusting block are arranged side by side along the width direction of the second adjusting block groove at the top of the inside of the second adjusting block groove.

[0021] Two top guide blocks of the first adjusting block are arranged side by side along the width direction of the groove of the second adjusting block on the top of the first adjusting block;

[0022] The distance between the two opposite sides of the top guide blocks of the two first adjusting blocks along the width direction of the groove of the second adjusting block is the same as the distance between the two adjacent sides of the bottom guide blocks of the two second adjusting blocks along the width direction of the groove of the second adjusting block. The top guide blocks of the two first adjusting blocks are placed between the bottom guide blocks of the two second adjusting blocks so that the second adjusting blocks slide relative to the first adjusting blocks.

[0023] In some embodiments, the bottom of the first adjusting block is provided with a first adjusting block groove, and two bottom guide blocks of the first adjusting block are arranged side by side along the width direction of the first adjusting block groove at the top of the first adjusting block groove.

[0024] The top of the base plate has two top guide blocks arranged side by side along the width direction of the groove of the first adjusting block. The distance between the two opposite sides of the two top guide blocks of the base plate along the width direction of the groove of the first adjusting block is the same as the distance between the two adjacent sides of the two bottom guide blocks of the first adjusting block along the width direction of the groove of the first adjusting block. The two top guide blocks of the base plate are placed between the two bottom guide blocks of the first adjusting block so that the first adjusting block slides relative to the base plate.

[0025] In some embodiments, the camera fine-tuning mechanism further includes a first adjusting rod and a second adjusting rod;

[0026] The first adjusting rod is fixedly connected to one end of the first adjusting block near the first side of the base plate. The first adjusting rod is used to push or pull the first adjusting block so that the first adjusting block drives the camera and lens to slide along the length direction of the base plate.

[0027] The second adjusting rod is fixedly connected to one end of the second adjusting block along the width direction of the base plate. The second adjusting rod is used to push or pull the second adjusting block to drive the camera and the lens to slide along the width direction of the base plate.

[0028] In some embodiments, a fixing block is also fixedly connected at the position corresponding to the first adjusting block and the second adjusting rod. The fixing block is provided with a fixing hole, through which the second adjusting rod passes.

[0029] In some embodiments, the camera fine-tuning mechanism further includes a first limiting structure, which includes a first limiting sheet metal and a first limiting screw;

[0030] The first limiting sheet metal is fixedly connected to the first adjusting block. The first limiting sheet metal is provided with a first strip-shaped limiting hole. The first limiting screw passes through the first strip-shaped limiting hole and is fixedly connected to the second adjusting block. The first limiting structure is used to limit the range of sliding of the second adjusting block along the width direction of the base plate.

[0031] In some embodiments, the camera fine-tuning mechanism further includes a second limiting structure, which includes a second limiting sheet metal and a second limiting screw.

[0032] The second limiting sheet metal is L-shaped, with one end fixedly connected to the base plate and the other end provided with a second strip-shaped limiting hole. The second limiting screw passes through the second strip-shaped limiting hole and is fixedly connected to the first adjusting block. The second strip-shaped limiting hole is used to limit the range of sliding of the first adjusting block along the length direction of the base plate.

[0033] In some embodiments, the platform is made of a transparent material;

[0034] The needle column detection device also includes: a stage support frame and a reflector;

[0035] The platform is fixed to the top of the platform support frame, and the platform support frame is fixed to the second side of the base plate;

[0036] The reflective surface of the mirror is fixed at an angle of ° to the optical axis of the camera to the lower part of the platform support frame;

[0037] The reflector is used to refract light rays emitted by the parallel coaxial light source, which are parallel to the camera's optical axis, upwards onto the end face of the PIN post; and to refract light rays reflected from the end face of the PIN post back into the lens.

[0038] In some embodiments, it further includes: a light source fine-tuning mechanism;

[0039] The parallel coaxial light source is mounted between the lens and the stage on the base plate based on the light source fine-tuning mechanism;

[0040] The light source fine-tuning mechanism is mounted on the base plate, and the top of the light source fine-tuning mechanism is fixedly connected to the parallel coaxial light source. The light source fine-tuning mechanism is used to adjust the rotation of the parallel coaxial light source relative to the base plate.

[0041] In some embodiments, the light source fine-tuning mechanism includes: a fixed rod, a third adjusting rod, a support plate, and a light source base;

[0042] The light source base is fixed to the base plate; the support plate is mounted on the light source base, and its top is fixedly connected to the parallel coaxial light source to support the parallel coaxial light source; and the support plate can rotate relative to the light source base.

[0043] The fixing rod extends from the support plate and is fixedly connected to the support plate;

[0044] The third adjusting rod is located on one side of the support plate and connected to the fixing rod. It is used to adjust the relative position of the fixing rod with respect to the light source base, so as to drive the support plate to rotate relative to the light source base.

[0045] In some embodiments, the light source base includes: a base plate connecting seat and an adjusting rod mounting seat;

[0046] The support plate is mounted on the base plate connecting seat; the bottom of the support plate has a rotating block; the base plate connecting seat has a rotating hole, and the support plate can rotate relative to the light source base by the cooperation of the rotating block and the rotating hole.

[0047] The adjusting rod mounting base is located on one side of the base plate connecting base and has a fixing rod receiving groove; the position of the fixing rod receiving groove corresponds to the fixing rod and can accommodate part of the fixing rod;

[0048] The adjusting rod mounting base is used to install the third adjusting rod, so that the third adjusting rod is connected to the fixing rod in the fixing rod receiving groove.

[0049] In some embodiments, one side of the adjusting rod mounting base is fixedly connected to the base plate connecting base, and the top of the adjusting rod mounting base has two adjusting rod mounting protrusions that are spaced apart from each other, and the gap between the two adjusting rod mounting protrusions forms the fixing rod receiving groove.

[0050] The third adjusting rod includes a first sub-adjusting rod and a second sub-adjusting rod; the first end of the first sub-adjusting rod passes through an adjusting rod mounting protrusion and extends into the fixed rod receiving groove, abutting against the first side of the fixed rod, and the second end of the first sub-adjusting rod extends out of the adjusting rod mounting seat as an adjustable end; the first end of the second adjusting rod passes through another adjusting rod mounting protrusion and extends into the fixed rod receiving groove, abutting against the second side of the fixed rod, and the second end of the second adjusting rod extends out of the adjusting rod mounting seat as an adjustable end.

[0051] In some embodiments, a light source base guide block is provided on one side of the base plate connecting seat, the support plate is cylindrical, and the side of the light source base guide block near the support plate is an arc surface that matches the side shape of the support plate. When the support plate rotates, the side surface is always in contact with the arc surface of the light source base guide block.

[0052] A needle column detection system includes the aforementioned needle column detection device and a host computer;

[0053] The host computer is electrically connected to the camera and is used to process the images acquired by the camera to obtain detection results.

[0054] In some embodiments, it further includes: a feeding mechanism and a discharging mechanism;

[0055] The feeding mechanism is used to place the PIN column to be tested onto the platform of the PIN column testing device for testing;

[0056] The feeding mechanism is used to remove the completed PIN pins from the platform of the pin pin detection device.

[0057] In some embodiments, the feeding mechanism includes a vibratory feeder, a conveyor line, and a feeding robotic arm gripper;

[0058] The vibratory feeder is located at the input end of the conveyor line, and the conveyor line and the feeding robotic arm gripper are arranged adjacent to the needle column detection device; the vibratory feeder transports the electronic component to be tested to the conveyor line, and the feeding robotic arm gripper places the electronic component to be tested onto the platform of the needle column detection device;

[0059] The unloading mechanism includes an unloading robotic arm gripper and a rejection robotic arm gripper;

[0060] The unloading robotic arm gripper is arranged adjacent to the needle column detection device and the rejection robotic arm gripper; the unloading robotic arm gripper takes qualified products from the carrier of the needle column detection device and puts them back on the conveyor line, and the rejection robotic arm gripper takes unqualified products from the carrier of the needle column detection device and puts them into the waste box.

[0061] In some embodiments, it also includes: a detection platform;

[0062] The needle column detection device, the host computer, the loading robotic arm gripper, the unloading robotic arm gripper, and the rejection robotic arm gripper are mounted on the detection platform.

[0063] The beneficial effects of this utility model embodiment are as follows:

[0064] The needle column detection device provided in this embodiment includes a base plate, a camera, a lens, a parallel coaxial light source, and a stage. The parallel coaxial light source converts light into light parallel to the camera's optical axis. When light parallel to the camera's optical axis illuminates the end face of a normal needle column, the reflected light is also parallel to the camera's optical axis. However, when light illuminates the end face of a skewed needle column, the reflected light is not parallel to the camera's optical axis. The lens filters out the non-parallel light reflected from the end face of the skewed needle column. The camera acquires an image of the needle column being detected. In the acquired image, because the non-parallel light reflected from the end face of the skewed needle column is filtered out by the lens, the image of the area where the needle column is located will be very dark, while the image of the area where the normal needle column is located will be very bright. This creates a significant grayscale difference, improving the detection effect of the needle column.

[0065] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0066] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0067] Figure 1a This is a schematic diagram of the overall structure of the needle column detection device provided in the embodiments of this application from a first angle.

[0068] Figure 1b This is a schematic diagram of the overall structure of the needle column detection device provided in the embodiments of this application from a second angle;

[0069] Figure 1c for Figure 1a The diagram shows a front view of the needle column detection device.

[0070] Figure 1d for Figure 1a Left view of the needle column detection device shown;

[0071] Figure 1e for Figure 1a The top view of the needle column detection device shown;

[0072] Figure 1f for Figure 1a An exploded view of the needle column detection device shown;

[0073] Figure 2a for Figure 1a The diagram shows the principle of the needle column detection device for detecting normal needle columns.

[0074] Figure 2b for Figure 1a The schematic diagram of the needle column detection device for detecting skewed needle columns is shown.

[0075] Figure 3 for Figure 1a A schematic diagram of the imaging scheme for the needle column detection device shown.

[0076] Figure 4 This is a schematic diagram of the detection principle of the needle column detection device provided in the embodiments of this application;

[0077] Figure 5 This is a schematic diagram of the structure of a toroidal magnetic core;

[0078] Figure 6a For use Figure 1a The needle column detection device shown is for Figure 5 The image shows the imaging effect of the toroidal magnetic core being tested.

[0079] Figure 6b For use Figure 1aThe needle column detection device shown is for Figure 5 Figure 2 shows the imaging effect of the toroidal magnetic core being tested.

[0080] Figure 7a for Figure 1a A schematic diagram of the camera fine-tuning mechanism of the needle column detection device shown;

[0081] Figure 7b for Figure 7a The exploded view of the camera fine-tuning mechanism shown from the first angle.

[0082] Figure 7c for Figure 7a The second-angle exploded view of the camera fine-tuning mechanism shown.

[0083] Figure 8a for Figure 1a A schematic diagram of the light source fine-tuning mechanism of the needle column detection device shown;

[0084] Figure 8b for Figure 8a The exploded view of the light source fine-tuning mechanism shown from the first angle;

[0085] Figure 8c for Figure 8a The exploded view of the light source fine-tuning mechanism shown from the second angle;

[0086] Figure 9 for Figure 1a A cross-sectional view of the parallel coaxial light source of the needle column detection device shown.

[0087] Figure 10 for Figure 9 A schematic diagram of the optical path of the parallel coaxial light source shown.

[0088] Figure 11 for Figure 1a The diagram shows the optical path of the lens.

[0089] Figure 12 This is a schematic diagram of the overall structure of the needle column detection system provided in the embodiments of this application.

[0090] Explanation of reference numerals in the attached figures:

[0091] Needle column detection device 1;

[0092] Base plate 100; First side 110; Second side 120; Top guide block of base plate 130; Camera 200; Optical receiver 210; Camera optical axis 220; Power socket 230; Network interface 240;

[0093] Lens 300; Lens housing 310; Grating 320; Grating aperture 321; First convex lens 330; Second convex lens 340;

[0094] Parallel coaxial light source 400; frame 410; light source housing space 411; point light source 420; Fresnel lens 430; semi-transparent and semi-reflective mirror 440; cable 450;

[0095] Stage 500; Camera fine-tuning mechanism 600; First adjusting block 610; Top guide block 611 of the first adjusting block; Bottom guide block 612 of the first adjusting block; Groove of the first adjusting block 613; Second adjusting block 620; Groove of the second adjusting block 621; Bottom guide block 622 of the second adjusting block; First adjusting rod 630; Second adjusting rod 640; Fixing block 650; Fixing hole 651; First limiting structure 660; First limiting sheet metal 661; First strip-shaped limiting hole 661a; First limiting screw 662; Second limiting structure 670; Second limiting screw 671;

[0096] Platform support frame 700; reflector 800; reflective surface 810;

[0097] Light source fine-tuning mechanism 900; fixed rod 910; abutment groove 911; third adjusting rod 920; first sub-adjusting rod 920a; second sub-adjusting rod 920b; support plate 930; rotating block 931; light source base 940; base plate connecting seat 941; adjusting rod mounting seat 942; fixed rod receiving groove 9421; adjusting rod mounting protrusion 9422; mounting hole 9423; connecting hole 943; light source base guide block 944; rotating hole 945; fourth adjusting rod 950; fifth adjusting block 960;

[0098] Electronic component 2; pin post 21; pin post end face 22;

[0099] 3. Host computer; 4. Feeding mechanism; 41. Conveyor line; 42. Feeding robotic arm gripper; 5. Unloading mechanism; 51. Unloading robotic arm gripper; 52. Removal robotic arm gripper; 53. Scrap box; 6. Detection platform;

[0100] Normal needle column area 7a; skewed needle column area 7b. Detailed Implementation

[0101] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.

[0102] To address the problem that the imaging effect in related technologies is insufficient to meet detection requirements, this application provides a needle column detection device and system. These will be described in detail below.

[0103] See Figures 1a to 1b ,in, Figure 1a This is a schematic diagram of the overall structure of the needle column detection device provided in the embodiments of this application from a first angle. Figure 1b This is a schematic diagram of the overall structure of the needle column detection device provided in the embodiments of this application from a second angle.

[0104] like Figures 1a to 1b As shown, the needle column detection device 1 provided in this application embodiment includes a base plate 100, a camera 200, a lens 300, a parallel coaxial light source 400, and a stage 500. The camera 200 is mounted on the first side 110 of the base plate 100 and is used to acquire images of the needle column 21 to be detected. The stage 500 is mounted on the second side 120 of the base plate 100 opposite to the camera 200 and is used to place the needle column 21 to be detected. The lens 300 is mounted on the light receiving end 210 of the camera 200 facing the stage 500 and is used to receive light rays parallel to the camera optical axis after reflection by the needle column end face 22, and filter out light rays that are not parallel to the camera optical axis. The parallel coaxial light source 400 is mounted on the base plate 100 and is located between the lens 300 and the stage 500 and is used to emit parallel illumination light parallel to the camera optical axis 220 toward the needle column end face 22 of the needle column 21 to be detected.

[0105] The needle column detection device 1 provided in this application embodiment includes a base plate 100, a camera 200, a lens 300, a parallel coaxial light source 400, and a stage 500. The parallel coaxial light source 400 converts light into light parallel to the camera optical axis 220. When the light parallel to the camera optical axis 220 illuminates the end face of a normal needle column, the reflected light is also parallel to the camera optical axis 220. When the light illuminates the end face of a skewed needle column, the reflected light is not parallel to the camera optical axis 220. The lens 300 filters out the light that is not parallel to the camera optical axis 220 after being reflected by the end face of the skewed needle column.

[0106] Specifically, when the base plate 100 is a rectangular plate, the first side 110 of the base plate 100 is one side along the length of the base plate 100, and the second side 120 of the base plate 100 is the side along the length of the base plate 100 opposite to the camera 200, that is, the second side 120 of the base plate 100 is the side along the length of the base plate 100 opposite to the first side 110.

[0107] When the base plate 100 is a square plate, the first side 110 of the base plate 100 can be any side of the base plate 100. Then, the second side 120 of the base plate 100 is the side of the base plate 100 opposite to the camera 200 in the direction of its side length, that is, the second side 120 of the base plate 100 is the side of the base plate 100 opposite to the first side 110 in the direction of its side length. In some embodiments, the lens 300 is a double telecentric lens or an object-side telecentric lens to filter out light rays that are not parallel to the camera optical axis after being reflected by the skewed pin end face 22.

[0108] See Figure 2a and Figure 2b , Figure 2a for Figure 1a The diagram shows the principle of the needle column detection device for detecting normal needle columns. Figure 2b for Figure 1a The schematic diagram of the needle column detection device for detecting misaligned needle columns is shown below; Figure 2a As shown, light rays parallel to the camera's optical axis 220, after being reflected by the normal needle end face, can be received by the camera, such as... Figure 2b As shown, a portion of the light rays that are not parallel to the camera's optical axis 220 after being reflected by the skewed end face of the needle column cannot be received by the camera.

[0109] Camera 200 acquires an image of the probe 21 being detected. In the acquired image, because the light rays that are not parallel to the camera optical axis 220 after being reflected by the end face of the skewed probe are filtered out by lens 300, the image of the area where the skewed probe is located will be very dark, while the image of the area where the normal probe is located will be very bright. This creates a significant difference in grayscale, which improves the detection effect of the probe.

[0110] Specifically, camera 200 can be a high-definition camera, such as a 5-megapixel camera, and lens 300 can have a magnification ratio of 0.5, such as... Figure 1e As shown, the distance t between the end of lens 300 near the parallel coaxial light source 400 and the parallel coaxial light source 400 is 10mm.

[0111] like Figure 1b As shown, the camera 200 is equipped with a power socket 230 and a network interface 240. The power socket 230 is used to connect to a power source via a cable to supply power to the camera 200 and ensure that the camera 200 works normally. The network interface 240 can connect to the network via a network cable.

[0112] See Figure 1a , Figure 1c and Figure 3 , Figure 1c for Figure 1a The diagram shows a front view of the needle column detection device. Figure 3 for Figure 1a The schematic diagram of the imaging scheme of the needle column detection device is shown; as follows: Figure 1a and Figure 3As shown, the stage 500 of the needle column detection device 1 is made of transparent material; the needle column detection device 1 also includes: a stage support frame 700 and a reflector 800; the stage 500 is fixed to the top of the stage support frame 700, and the stage support frame 700 is fixed to the second side 120 of the base plate 100; the reflective surface 810 of the reflector 800 is fixed at a 45° angle to the camera optical axis 220 at the lower part of the stage support frame 700, and the reflector 800 is used to refract light rays parallel to the camera optical axis 220 emitted by the parallel coaxial light source 400 upward to the needle column end face 22; and to refract the light rays reflected by the needle column end face 22 back to the lens 300.

[0113] The transparent platform can be a glass platform or an acrylic platform, etc.

[0114] In this embodiment, the light emitted by the parallel coaxial light source 400 is refracted by the reflector 800 by 90° and illuminates the needle end face 22. The light reflected by the needle end face 22 is refracted by the reflector 800 by 90° again and enters the lens 300.

[0115] Specifically, the size of the reflector 800 can be 20mm, and the distance L between the end of the lens 300 closest to the reflector 800 and the reflector 800 is 40mm; for example Figure 1d and Figure 3 As shown, Figure 1d for Figure 1a The left view of the needle post detection device shown; the distance d between the top of the reflector 800 and the needle post 21 of the electronic component 2 being tested is 5mm.

[0116] In practical applications, the size, distance L, and distance d of the reflector 800 can be adjusted according to the actual situation.

[0117] See Figure 4 , Figure 4 This is a schematic diagram of the detection principle of the needle column detection device provided in the embodiments of this application; as follows: Figure 4 As shown, the detection principle of the needle column detection device is as follows: the parallel coaxial light source 400 converts the light emitted from the point light source into light parallel to the camera optical axis. The light parallel to the camera optical axis illuminates the inclined surface of the reflector 800, and is reflected by the reflector 800 to the end face of the needle column on the stage 500. The light is reflected back to the reflector 800 from the end face of the needle column. The light parallel to the camera optical axis after being reflected by the reflector 800 enters the lens 300 and the camera 200, and is then imaged by the camera 200.

[0118] The following description uses a needle column with a toroidal magnetic core as an example to illustrate the detection effect of the needle column detection device 1 provided in this application.

[0119] See Figures 5 to 6b , Figure 5This is a schematic diagram of the structure of a toroidal magnetic core; Figure 6a For use Figure 1a The needle column detection device shown is for Figure 5 The image shows the imaging effect of the toroidal magnetic core being tested. Figure 6b For use Figure 1a The needle column detection device shown is for Figure 5 Figure 2 shows the imaging effect of the toroidal magnetic core being inspected; as shown. Figures 5 to 6b As shown, the images captured by the needle column detection device 1 on the end face of the needle column of the toroidal magnetic core show that the image of the area 7b where the needle column is skewed is very dark, while the image of the area 7a where the needle column is normal is very bright, forming a significant grayscale difference and improving the detection effect of the needle column.

[0120] In some other embodiments of this application, the needle detection device 1 of this application can also detect whether other needle-shaped objects with end faces are skewed, such as: skew detection of conductive needles on cable connectors.

[0121] In some embodiments of this application, the needle column detection device 1 also has the function of fine-tuning the position of the camera 200 and the position of the parallel coaxial light source 400, specifically:

[0122] like Figure 1a As shown, the needle column detection device also includes: a camera fine-tuning mechanism 600;

[0123] The camera 200 is mounted on the first side 110 of the base plate 100 along its length direction based on the camera fine-tuning mechanism 600; the bottom of the camera fine-tuning mechanism 600 is mounted on the base plate 100, and the top of the camera fine-tuning mechanism 600 is fixedly connected to the camera 200. The camera fine-tuning mechanism 600 is used to adjust the camera 200 and the lens 300 along the length direction and the width direction of the base plate 100.

[0124] In this embodiment, the camera fine-tuning mechanism 600 adjusts the camera 200 and lens 300 along the length and width of the base plate 100, which can change the position and distance of the camera 200 and lens 300 relative to the needle post 21 of the electronic component 2 being tested, making the position of the camera 200 and lens 300 relative to the needle post 21 of the electronic component 2 being tested more accurate.

[0125] See Figures 7a to 7c , Figure 7a for Figure 1a A schematic diagram of the camera fine-tuning mechanism of the needle column detection device shown; Figure 7b for Figure 7a The exploded view of the camera fine-tuning mechanism shown from the first angle. Figure 7c for Figure 7a The second exploded view of the camera fine-tuning mechanism shown; as Figures 6a to 7cAs shown, the camera fine-tuning mechanism 600 includes a first adjusting block 610 and a second adjusting block 620; the bottom of the first adjusting block 610 is slidably connected to the base plate 100 along the length direction of the base plate 100, so as to drive the camera 200 and the lens 300 to slide along the length direction of the base plate 100.

[0126] The top of the second adjusting block 620 is fixedly connected to the camera 200, and the bottom of the second adjusting block 620 is slidably connected to the top of the first adjusting block 610 along the width direction of the base plate 100, so as to drive the camera 200 and the lens 300 to slide along the width direction of the base plate 100.

[0127] In this embodiment, the camera fine-tuning mechanism 600 adjusts the camera 200 and lens 300 along the length and width of the base plate 100, which can change the position and distance of the camera 200 and lens 300 relative to the needle post 21 of the electronic component 2 being tested, making the position of the camera 200 and lens 300 relative to the needle post 21 of the electronic component 2 being tested more accurate.

[0128] Specifically, such as Figures 7b to 7c As shown, the bottom of the second adjusting block 620 is provided with a second adjusting block groove 621, and two bottom guide blocks 622 of the second adjusting block are arranged side by side along the width direction of the second adjusting block groove 621 at the top of the second adjusting block groove 621; two top guide blocks 611 of the first adjusting block are arranged side by side along the width direction of the second adjusting block groove 621 at the top of the first adjusting block 610; the distance between the two opposite sides of the two top guide blocks 611 of the first adjusting block along the width direction of the second adjusting block groove 621 is the same as the distance between the two adjacent sides of the two bottom guide blocks 622 of the second adjusting block along the width direction of the second adjusting block groove 621. The two top guide blocks 611 of the first adjusting block are placed between the two bottom guide blocks 622 of the second adjusting block so that the second adjusting block 620 can slide relative to the first adjusting block.

[0129] like Figure 1f and Figure 7cAs shown, the bottom of the first adjusting block 610 is provided with a first adjusting block groove 613, and two bottom guide blocks 612 of the first adjusting block are arranged side by side along the width direction of the first adjusting block groove 613 at the top of the first adjusting block groove 613. Two top guide blocks 130 of the base plate are arranged side by side along the width direction of the first adjusting block groove 613 at the top of the base plate 100. The distance between the two opposite sides of the two top guide blocks 130 of the base plate along the width direction of the first adjusting block groove 613 is the same as the distance between the two close sides of the two bottom guide blocks 612 of the first adjusting block along the width direction of the first adjusting block groove 613. The top guide blocks 130 of the two base plates are placed between the two bottom guide blocks 612 of the first adjusting block so that the first adjusting block 610 can slide relative to the base plate 100.

[0130] In this embodiment, the bottom guide block 622 of the second adjusting block can be connected to the groove 621 of the second adjusting block by screws, and the bottom guide block 612 of the first adjusting block can be connected to the groove 613 of the first adjusting block by screws. The guide block can play a guiding role, prevent deviation during sliding, and improve the stability of relative sliding.

[0131] like Figures 7a to 7c As shown, the camera fine-tuning mechanism 600 also includes a first adjusting rod 630 and a second adjusting rod 640; the first adjusting rod 630 is fixedly connected to one end of the first adjusting block 610 near the first side 110 of the base plate 100, and the first adjusting rod 630 is used to push or pull the first adjusting block 610 so that the first adjusting block 610 drives the camera 200 and the lens 300 to slide along the length direction of the base plate 100.

[0132] The second adjusting rod 640 is fixedly connected to one end of the second adjusting block 620 along the width direction of the base plate 100. The second adjusting rod 640 is used to push or pull the second adjusting block 620 to drive the camera 200 and lens 300 to slide along the width direction of the base plate 100.

[0133] In this embodiment, the first adjusting rod 630 can be threadedly connected to the first adjusting block 610. The first adjusting rod 630 is used to push or pull the first adjusting block 610 so that the first adjusting block 610 drives the camera 200 and lens 300 to slide along the length direction of the base plate 100. The second adjusting rod 640 is used to push or pull the second adjusting block 620 so that the camera 200 and lens 300 slide along the width direction of the base plate 100, making the position adjustment of the camera 200 and lens 300 more convenient.

[0134] like Figure 7bAs shown, a fixing block 650 is fixedly connected at the position corresponding to the first adjusting block 610 and the second adjusting rod 640. The fixing block 650 is provided with a fixing hole 651. The second adjusting rod 640 passes through the fixing hole 651 and is connected to the second adjusting block 620. The second adjusting rod 640 can be threadedly connected to the second adjusting block 620.

[0135] In this embodiment, the second adjusting rod 640 passes through the fixing hole 651 on the fixing block 650. The fixing block 650 can provide support for the second adjusting rod 640. The fixing hole 651 on the fixing block 650 can also limit the second adjusting rod 640 to push or pull along the width direction of the base plate 100, thereby improving the stability of the camera 200 fine adjustment mechanism.

[0136] like Figure 7b As shown, the camera fine-tuning mechanism 600 also includes a first limiting structure 660, which includes a first limiting sheet metal 661 and a first limiting screw 662.

[0137] The first limiting sheet metal 661 is fixedly connected to the first adjusting block 610. The first limiting sheet metal 661 is provided with a first strip-shaped limiting hole 661a. The first strip-shaped limiting hole 661a has a certain length along the length direction of the first limiting sheet metal 661. The first limiting screw 662 passes through the first strip-shaped limiting hole 661a and is fixedly connected to the second adjusting block 620. The first strip-shaped limiting hole 661a is used to limit the range of sliding of the second adjusting block 620 along the width direction of the base plate 100.

[0138] In this embodiment, the first limiting structure 660 limits the range of sliding of the second adjusting block 620 along the width direction of the base plate 100, preventing the second adjusting block 620 from disengaging from the first adjusting block 610 along the width direction of the base plate 100, thereby further improving the stability of the camera fine-tuning mechanism 600.

[0139] like Figure 7b As shown, the camera fine-tuning mechanism 600 also includes a second limiting structure 670. The second limiting structure 670 includes a second limiting sheet metal and a second limiting screw 671;

[0140] The second limiting sheet metal is L-shaped, with one end fixedly connected to the base plate 100 and the other end provided with a second strip-shaped limiting hole. The second strip-shaped limiting hole has a certain length along the length direction of the second limiting sheet metal. The second limiting screw 671 is fixedly connected to the end of the first adjusting block 610 away from the fixed block 650. The second limiting screw 671 passes through the second strip-shaped limiting hole and is fixedly connected to the first adjusting block 610. The second strip-shaped limiting hole is used to limit the range of sliding of the first adjusting block 610 along the length direction of the base plate 100.

[0141] In this embodiment, the second limiting structure 670 limits the range in which the first adjusting block 610 slides along the length direction of the base plate 100, further improving the stability of the camera fine-tuning mechanism 600.

[0142] like Figure 1a As shown, the needle column detection device 1 further includes: a light source fine-tuning mechanism 900; a parallel coaxial light source 400 is mounted between the lens 300 and the stage 500 on the base plate 100 based on the light source fine-tuning mechanism 900; the light source fine-tuning mechanism 900 is mounted on the base plate 100, and the top of the light source fine-tuning mechanism 900 is fixedly connected to the parallel coaxial light source 400. The light source fine-tuning mechanism 900 is used to adjust the rotation of the parallel coaxial light source 400 relative to the base plate 100.

[0143] In this embodiment, the light source fine-tuning mechanism 900 causes the parallel coaxial light source 400 to rotate relative to the base plate 100, so that the angle of the parallel coaxial light source 400 relative to the electronic component 2 being tested can be adjusted, thereby more accurately adjusting the position of the parallel coaxial light source 400 relative to the electronic component 2 being tested.

[0144] See Figures 8a to 8c , Figure 8a for Figure 1a A schematic diagram of the light source fine-tuning mechanism of the needle column detection device shown; Figure 8b for Figure 8a The exploded view of the light source fine-tuning mechanism shown from the first angle; Figure 8c for Figure 8a The exploded view of the light source fine-tuning mechanism at the second angle is shown; as follows: Figures 8a to 8c As shown, the light source fine-tuning mechanism 900 includes: a fixed rod 910, a third adjusting rod 920, a support plate 930, and a light source base 940;

[0145] The light source base 940 is fixed on the base plate 100; the support plate 930 is installed on the light source base 940, and its top is fixedly connected to the parallel coaxial light source 400 to support the parallel coaxial light source 400; and the support plate 930 can rotate relative to the light source base 940.

[0146] The fixing rod 910 extends from the support plate 930 and is fixedly connected to the support plate 930;

[0147] The third adjusting rod 920 is located on one side of the support plate 930 and is connected to the fixing rod 910. It is used to adjust the relative position of the fixing rod 910 with respect to the light source base 940, so as to drive the support plate 930 to rotate relative to the light source base 940.

[0148] Specifically, the light source base 940 can be fixedly connected to the base plate 100 through the connection hole 943 and screws on the light source base 940.

[0149] like Figures 8a to 8c As shown, the light source base 940 includes: a base plate connecting seat 941 and an adjusting rod mounting seat 942;

[0150] The support plate 930 is mounted on the base plate connecting seat 941; the bottom of the support plate 930 has a rotating block 931; the base plate connecting seat 941 is provided with a rotating hole 945, and the support plate 930 can rotate relative to the light source base 940 by the cooperation of the rotating block 931 and the rotating hole 945.

[0151] The adjusting rod mounting base 942 is located on one side of the base plate connecting base 941 and has a fixing rod receiving groove 9421; the position of the fixing rod receiving groove 9421 corresponds to the fixing rod 910 and can accommodate part of the fixing rod 910;

[0152] The adjusting rod mounting base 942 is used to install the third adjusting rod 920, so that the third adjusting rod 920 is connected to the fixed rod 910 in the fixed rod receiving groove 9421.

[0153] One side of the adjusting rod mounting base 942 is fixedly connected to the base plate connecting base 941. The top of the adjusting rod mounting base 942 has two adjusting rod mounting protrusions 9422 that are relatively spaced apart. The gap between the two adjusting rod mounting protrusions 9422 forms a fixing rod receiving groove 9421.

[0154] The third adjusting rod 920 includes a first sub-adjusting rod 920a and a second sub-adjusting rod 920b. The first end of the first sub-adjusting rod 920a passes through an adjusting rod mounting protrusion 9422, extends into the fixing rod receiving groove 9421, and abuts against the first side of the fixing rod 910. The second end of the first sub-adjusting rod 920a extends out of the adjusting rod mounting seat 942 as an adjustable end. The first end of the second sub-adjusting rod 920b passes through another adjusting rod mounting protrusion 9422, extends into the fixing rod receiving groove 9421, abuts against the second side of the fixing rod 910, and the second end of the second sub-adjusting rod 920b extends out of the adjusting rod mounting seat 942 as an adjustable end.

[0155] The second side of the fixed rod 910 is provided with an abutment groove 911, and the first end of the second sub-adjusting rod 920b abuts against the abutment groove 911 on the second side of the fixed rod 910.

[0156] When the first sub-adjustment rod 920a or the second sub-adjustment rod 920b is pushed, the fixing rod 910 causes the support plate 930 and the parallel coaxial light source 400 on the support plate 930 to rotate relative to the base plate 100. The setting of the third adjustment rod 920 makes it more convenient to adjust the angle of the parallel coaxial light source 400 relative to the probe to be tested.

[0157] In this embodiment, the first sub-adjustment rod 920a and the second sub-adjustment rod 920b can extend into the fixed rod receiving groove 9421 through the mounting hole 9423 on the upper part of the adjustment rod mounting protrusion 9422. The mounting hole 9423 can restrict the movement of the first sub-adjustment rod 920a and the second sub-adjustment rod 920b, thereby improving the stability of the position adjustment of the parallel coaxial light source 400.

[0158] like Figure 8a and Figure 8b As shown, a light source base guide block 944 is provided on one side of the base plate connecting seat 941. The support plate 930 is cylindrical, and the side of the light source base guide block 944 near the support plate 930 is an arc surface that matches the side shape of the support plate 930. When the support plate 930 rotates, the side surface is always in contact with the arc surface of the light source base guide block 944, which plays a guiding role and makes the rotation of the support plate 930 more stable.

[0159] In addition, a fourth adjusting rod 950 and a fifth adjusting block 960 are fixed on the side of the support plate 930. The fourth adjusting rod 950 and the fifth adjusting block 960 can directly drive the support plate 930 and the parallel coaxial light source 400 above it to rotate.

[0160] See Figure 9 , Figure 9 for Figure 1a A cross-sectional view of the parallel coaxial light source of the needle column detection device shown; as follows: Figure 9 As shown, the parallel coaxial light source 400 includes: a frame 410, a point light source 420, a Fresnel lens 430, and a semi-transparent mirror 440; the frame 410 includes a light source housing space 411; the point light source 420, the Fresnel lens 430, and the semi-transparent mirror 440 are disposed within the light source housing space 411.

[0161] Specifically, the Fresnel lens 430 is located between the point light source 420 and the semi-transparent mirror 440. The point light source 420 emits light into the Fresnel lens 430. The Fresnel lens 430 is parallel to the camera's optical axis 220 and refracts the light emitted from the point light source 420 into light perpendicular to the camera's optical axis 220. The semi-transparent mirror 440 is placed at a 45° angle to the Fresnel lens 430 and refracts the light emitted from the Fresnel lens 430 perpendicular to the camera's optical axis 220 into light parallel to the camera's optical axis 220. The parallel coaxial light source 400 can be an existing parallel coaxial light source.

[0162] The parallel coaxial light source 400 can convert the light emitted by the point light source 420 into light parallel to the camera optical axis 220, thereby ensuring that the light illuminating the needle end face 22 of the electronic component 2 being tested is parallel to the camera optical axis 220.

[0163] The parallel coaxial light source 400 uses a point light source 420 paired with a Fresnel lens 430 and a semi-transparent and semi-reflective mirror 440 to provide concentrated and uniform illumination, making the illuminated area bright and with good visibility.

[0164] See Figure 10 , Figure 10 for Figure 9 The diagram shows the optical path of a parallel coaxial light source; as shown. Figure 10 As shown, point light source 420 emits light to Fresnel lens 430. The light is refracted by Fresnel lens 430 into parallel light perpendicular to the camera optical axis 220. The parallel light refracted by Fresnel lens 430 and perpendicular to the camera optical axis 220 illuminates the semi-transparent mirror 440, which refracts it into parallel light parallel to the camera optical axis 220.

[0165] Specifically, the point light source 420 is connected to a cable 450, which connects the point light source 420 to an external power supply to ensure its normal operation. The point light source 420 can be an LED point light source, a laser point light source, etc.

[0166] See Figure 1f and Figure 11 , Figure 11 for Figure 1a The optical path diagram of the lens shown is as follows; Figure 1f and Figure 11 As shown, the lens 300 includes a lens housing 310, a grating 320, a first convex lens 330, and a second convex lens 340; the lens housing 310 includes a lens receiving space inside; the grating 320, the first convex lens 330, and the second convex lens 340 are disposed within the lens receiving space.

[0167] Specifically, the grating 320 is located between the first convex lens 330 and the second convex lens 340, and the grating 320 is located at the focal length F of the first convex lens 330 and the second convex lens 340. The grating 320, the first convex lens 330 and the second convex lens 340 are arranged in a direction parallel to the optical axis of the camera 200. The first convex lens 330 is used to converge the light reflected by the pin end face 22 at the focal point. The grating 320 is provided with a grating hole 321, which is located at the focal point of the first convex lens 330 and the second convex lens 340. The grating hole 321 is used to allow the light converged at the focal point by the first convex lens 330 to pass through. The second convex lens 340 is used to refract the light passing through the grating hole 321 into light parallel to the optical axis 220 of the camera.

[0168] Lens 300 allows parallel light parallel to the camera's optical axis 220 to pass through, filters out light that is not parallel to the camera's optical axis 220, and prevents light that is not parallel to the camera's optical axis 220 from entering the camera 200.

[0169] like Figure 11 As shown, the light emitted by the parallel coaxial light source 400, which is parallel to the camera optical axis 220, illuminates the pin end face 22 of the electronic component 2 being tested. After being reflected by the normal pin end face, the light is still parallel to the camera optical axis 220. The parallel light reflected by the normal pin end face, which is parallel to the camera optical axis 220, converges at the focal point of the first convex lens 330. The converged light can be refracted by the second convex lens 340 through the grating hole 321 of the grating 320 into parallel light parallel to the camera optical axis 220, and then received by the camera 200.

[0170] The light rays reflected by the skewed end face of the needle are not parallel to the optical axis 220 of the camera. The light rays reflected by the skewed end face of the needle are not parallel to the optical axis 220 of the camera. They will not converge at the focal point of the first convex lens 330, and therefore cannot pass through the grating hole 321 of the grating 320, and will not be received by the camera 200.

[0171] Therefore, the image area at the location of the skewed needle column will be very dark, while the image area at the location of the normal needle column will be very bright, thus creating a significant grayscale difference and improving the detection effect of the needle column.

[0172] This application also provides a needle column detection system, including a host computer 3 and the needle column detection device 1 in any of the above embodiments. In this application embodiment, the host computer 3 is electrically connected to a camera 200 and is used to process the images acquired by the camera 200 to obtain detection results.

[0173] See Figure 12 , Figure 12 This is a schematic diagram of the overall structure of the needle column detection system provided in the embodiments of this application; as shown. Figure 12 As shown, the needle column detection system includes a loading mechanism 4, a unloading mechanism 5, a host computer 3, and the needle column detection device 1 in any of the above embodiments. In this embodiment, the loading mechanism 4 is used to place the needle column to be tested onto the platform of the needle column detection device 1 for testing; the unloading mechanism 5 is used to remove the tested needle column from the platform of the needle column detection device 1.

[0174] like Figure 12 As shown, the feeding mechanism 4 includes a vibratory feeder (not shown in the figure), a conveyor line 41, and a feeding robotic arm gripper 42. The vibratory feeder is located at the input end of the conveyor line 41. The conveyor line 41 and the feeding robotic arm gripper 42 are adjacent to the needle column detection device 1. The electronic component 2 to be tested is conveyed to the conveyor line 41 through the vibratory feeder. After reaching the designated position, the feeding robotic arm gripper 42 picks up the needle column to be tested and places it on the platform of the needle column detection device 1 for testing.

[0175] The host computer 3 can control the start and stop of the conveyor line 41, and control the movement, gripping or releasing of the feeding robot gripper 42; the host computer 3 can receive images captured by the camera 200, and then process the images to obtain detection results.

[0176] As mentioned above, Figure 6a and Figure 6b As shown, the imaging effect diagram includes a normal needle column area 7a and a skewed needle column area 7b. The host computer 3 receives the imaging effect diagram from the needle column detection device 1, and then judges whether the needle columns 21 of the electronic component 2 being tested are skewed based on the imaging effect diagram. Non-skewed needle columns are judged as qualified products, and skewed needle columns are judged as unqualified products.

[0177] like Figure 12 As shown, the unloading mechanism 5 includes an unloading robotic arm gripper 51 and a rejection robotic arm gripper 52. The rejection robotic arm gripper 52 is adjacent to the needle column detection device 1. The host computer 3 can also control the movement, gripping, or releasing of the unloading robotic arm gripper 51. After the needle column detection is completed, the unloading robotic arm gripper 51 of the unloading mechanism 5 takes the qualified products from the platform of the needle column detection device 1 and puts them back into the conveyor line 41 according to the detection results. The rejection robotic arm gripper 52 takes the unqualified products from the platform of the needle column detection device 1 and puts them into the waste box 53 according to the detection results.

[0178] The needle column detection system may also include a detection platform 6, a loading robotic arm gripper 42, a needle column detection device 1, a unloading robotic arm gripper 51, a host computer 3, and a rejection robotic arm gripper 52, all of which are located on the detection platform 6, so that the host computer 3 and the needle column detection device 1 are at a suitable height, making it more convenient for staff to operate.

[0179] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A needle column detection device, characterized in that, include: The base plate (100), camera (200), lens (300), parallel coaxial light source (400) and stage (500); The camera (200) is mounted on the first side (110) of the base plate (100) and is used to acquire images of the probe (21) being tested; The stage (500) is installed on the second side (120) opposite to the base plate (100) and the camera (200) and is used to place the probe column (21) to be tested. The lens (300) is mounted on the camera (200) at the light receiving end (210) facing the stage (500) to receive light rays parallel to the camera optical axis after reflection by the pin end face (22) and filter out light rays that are not parallel to the camera optical axis. The parallel coaxial light source (400) is mounted on the base plate (100) and located between the lens (300) and the stage (500) to emit parallel illumination light parallel to the camera optical axis (220) toward the end face (22) of the probe (21) being tested.

2. The needle column detection device according to claim 1, characterized in that, The lens (300) is a double telecentric lens or an object-side telecentric lens.

3. The needle column detection device according to claim 1, characterized in that, Also includes: camera fine-tuning mechanism (600); The camera (200) is mounted on the first side (110) of the base plate (100) in the length direction based on the camera fine-tuning mechanism (600). The bottom of the camera fine-tuning mechanism (600) is mounted on the base plate (100), and the top of the camera fine-tuning mechanism (600) is fixedly connected to the camera (200). The camera fine-tuning mechanism (600) is used to adjust the camera (200) and the lens (300) along the length direction and the width direction of the base plate (100).

4. The needle column detection device according to claim 3, characterized in that, The camera fine-tuning mechanism (600) includes a first adjustment block (610) and a second adjustment block (620); The bottom of the first adjusting block (610) is slidably connected to the base plate (100) along the length direction of the base plate (100) so as to drive the camera (200) and lens (300) to slide along the length direction of the base plate (100); The top of the second adjustment block (620) is fixedly connected to the camera (200), and the bottom of the second adjustment block (620) is slidably connected to the top of the first adjustment block (610) along the width direction of the base plate (100) so as to drive the camera (200) and the lens (300) to slide along the width direction of the base plate (100).

5. The needle column detection device according to claim 4, characterized in that, The bottom of the second adjusting block (620) is provided with a second adjusting block groove (621), and the top of the inside of the second adjusting block groove (621) is provided with two bottom guide blocks (622) of the second adjusting block side by side along the width direction of the second adjusting block groove (621). The top of the first adjusting block (610) is provided with two top guide blocks (611) side by side along the width direction of the groove (621) of the second adjusting block. The distance between the two opposite sides of the top guide blocks (611) of the two first adjustment blocks along the width direction of the groove (621) of the second adjustment block is the same as the distance between the two adjacent sides of the bottom guide blocks (622) of the two second adjustment blocks along the width direction of the groove (621) of the second adjustment block. The top guide blocks (611) of the two first adjustment blocks are placed between the bottom guide blocks (622) of the two second adjustment blocks so that the second adjustment block (620) slides relative to the first adjustment block (610).

6. The needle column detection device according to claim 4, characterized in that, The bottom of the first adjusting block (610) is provided with a first adjusting block groove (613), and the top of the first adjusting block groove (613) is provided with two bottom guide blocks (612) of the first adjusting block side by side along the width direction of the first adjusting block groove (613). The top of the base plate (100) is provided with two top guide blocks (130) arranged side by side along the width direction of the first adjusting block groove (613). The distance between the two opposite sides of the two top guide blocks (130) along the width direction of the first adjusting block groove (613) is the same as the distance between the two adjacent sides of the two bottom guide blocks (612) along the width direction of the first adjusting block groove (613). The two top guide blocks (130) are placed between the two bottom guide blocks (612) of the first adjusting blocks so that the first adjusting block (610) slides relative to the base plate (100).

7. The needle column detection device according to claim 4, characterized in that, The camera fine-tuning mechanism (600) also includes a first adjusting rod (630) and a second adjusting rod (640); The first adjusting rod (630) is fixedly connected to one end of the first adjusting block (610) near the first side (110) of the base plate (100). The first adjusting rod (630) is used to push or pull the first adjusting block (610) so that the first adjusting block (610) drives the camera (200) and lens (300) to slide along the length direction of the base plate (100). The second adjusting rod (640) is fixedly connected to one end of the second adjusting block (620) along the width direction of the base plate (100). The second adjusting rod (640) is used to push or pull the second adjusting block (620) to drive the camera (200) and the lens (300) to slide along the width direction of the base plate (100).

8. The needle column detection device according to claim 7, characterized in that, A fixing block (650) is fixedly connected at the position corresponding to the first adjusting block (610) and the second adjusting rod (640). The fixing block (650) is provided with a fixing hole (651), and the second adjusting rod (640) passes through the fixing hole (651).

9. The needle column detection device according to claim 8, characterized in that, The camera fine-tuning mechanism (600) further includes a first limiting structure (660), which includes a first limiting sheet metal (661) and a first limiting screw (662). The first limiting sheet metal (661) is fixedly connected to the first adjusting block (610). The first limiting sheet metal (661) is provided with a first strip-shaped limiting hole (661a). The first limiting screw (662) passes through the first strip-shaped limiting hole (661a) and is fixedly connected to the second adjusting block (620). The first strip-shaped limiting hole (661a) is used to limit the range of sliding of the second adjusting block (620) along the width direction of the base plate (100).

10. The needle column detection device according to claim 8, characterized in that, The camera fine-tuning mechanism (600) further includes a second limiting structure (670), which includes a second limiting sheet metal and a second limiting screw (671). The second limiting sheet metal is L-shaped, with one end fixedly connected to the base plate (100) and the other end provided with a second strip-shaped limiting hole. The second limiting screw (671) passes through the second strip-shaped limiting hole and is fixedly connected to the first adjusting block (610). The second strip-shaped limiting hole is used to limit the range of sliding of the first adjusting block (610) along the length direction of the base plate (100).

11. The needle column detection device according to claim 1, characterized in that, The stage (500) is made of transparent material; The needle column detection device also includes: a stage support frame (700) and a reflector (800). The platform (500) is fixed to the top of the platform support frame (700), and the platform support frame (700) is fixed to the second side (120) of the base plate (100). The reflecting surface (810) of the mirror (800) is fixed at a 45° angle to the optical axis (220) of the camera and is fixed to the lower part of the platform support frame (700); The reflector (800) is used to refract light rays emitted by the parallel coaxial light source (400) that are parallel to the camera optical axis (220) upwards to the pin end face (22); and to refract light rays reflected by the pin end face (22) back to the lens (300).

12. The needle column detection device according to claim 1, characterized in that, It also includes: a light source fine-tuning mechanism (900); The parallel coaxial light source (400) is mounted on the base plate (100) between the lens (300) and the stage (500) based on the light source fine-tuning mechanism (900); The light source fine-tuning mechanism (900) is mounted on the base plate (100). The top of the light source fine-tuning mechanism (900) is fixedly connected to the parallel coaxial light source (400). The light source fine-tuning mechanism (900) is used to adjust the rotation of the parallel coaxial light source (400) relative to the base plate (100).

13. The needle column detection device according to claim 12, characterized in that, The light source fine-tuning mechanism (900) includes: a fixed rod (910), a third adjusting rod (920), a support plate (930), and a light source base (940). The light source base (940) is fixed on the base plate (100); the support plate (930) is installed on the light source base (940), and its top is fixedly connected to the parallel coaxial light source (400) to support the parallel coaxial light source (400); and the support plate (930) can rotate relative to the light source base (940). The fixing rod (910) extends from the support plate (930) and is fixedly connected to the support plate (930); The third adjusting rod (920) is located on one side of the support plate (930) and connected to the fixing rod (910). It is used to adjust the relative position of the fixing rod (910) with respect to the light source base (940) so as to drive the support plate (930) to rotate relative to the light source base (940).

14. The needle column detection device according to claim 13, characterized in that, The light source base (940) includes: a base plate connecting seat (941) and an adjustment rod mounting seat (942); The support plate (930) is disposed on the base plate connecting seat (941); the bottom of the support plate (930) has a rotating block (931); the base plate connecting seat (941) is provided with a rotating hole (945), and the support plate (930) can rotate relative to the light source base (940) by the cooperation of the rotating block (931) and the rotating hole (945). The adjusting rod mounting base (942) is located on one side of the base plate connecting base (941) and has a fixing rod receiving groove (9421); the position of the fixing rod receiving groove (9421) corresponds to the fixing rod (910) and can accommodate part of the fixing rod (910). The adjusting rod mounting base (942) is used to install the third adjusting rod (920), such that the third adjusting rod (920) is connected to the fixing rod (910) in the fixing rod receiving groove (9421).

15. The needle column detection device according to claim 14, characterized in that, One side of the adjusting rod mounting base (942) is fixedly connected to the base plate connecting base (941). The top of the adjusting rod mounting base (942) has two adjusting rod mounting protrusions (9422) that are arranged at a relatively interval. The interval between the two adjusting rod mounting protrusions (9422) forms the fixing rod receiving groove (9421). The third adjusting rod (920) includes a first sub-adjusting rod (920a) and a second sub-adjusting rod (920b); the first end of the first sub-adjusting rod (920a) passes through an adjusting rod mounting protrusion (9422) and extends into the fixed rod receiving groove (9421), abutting against the first side of the fixed rod (910); the second end of the first sub-adjusting rod (920a) extends out of the adjusting rod mounting seat (942) as an adjustable end; the first end of the second sub-adjusting rod (920b) passes through another adjusting rod mounting protrusion (9422) and extends into the fixed rod receiving groove (9421), abutting against the second side of the fixed rod (910); the second end of the second sub-adjusting rod (920b) extends out of the adjusting rod mounting seat (942) as an adjustable end.

16. The needle column detection device according to claim 14, characterized in that, The base plate connecting seat (941) has a light source base guide block (944) on one side. The support plate (930) is cylindrical. The side of the light source base guide block (944) near the support plate (930) is an arc surface that matches the side shape of the support plate (930). When the support plate (930) rotates, the side surface is always in contact with the arc surface of the light source base guide block (944).

17. A needle column detection system, characterized in that, Includes the needle column detection device (1) and the host computer (3) as described in any one of claims 1 to 16; The host computer (3) is electrically connected to the camera (200) and is used to process the images acquired by the camera (200) to obtain detection results.

18. The needle column detection system according to claim 17, characterized in that, It also includes: a feeding mechanism (4) and a discharging mechanism (5); The feeding mechanism (4) is used to place the needle column to be tested onto the platform of the needle column testing device (1) for testing; The feeding mechanism (5) is used to remove the completed needle column from the platform of the needle column testing device (1).

19. The needle column detection system according to claim 18, characterized in that, The feeding mechanism (4) includes a vibratory feeder, a conveyor line (41), and a feeding robotic arm gripper (42). The vibratory feeder is located at the input end of the conveyor line (41), and the conveyor line (41) and the loading robotic arm gripper (42) are arranged adjacent to the needle column detection device (1); the vibratory feeder transports the electronic component (2) to be tested to the conveyor line (41), and the loading robotic arm gripper (42) places the electronic component (2) to be tested onto the platform of the needle column detection device (1); The unloading mechanism (5) includes an unloading robotic arm gripper (51) and a rejection robotic arm gripper (52). The unloading robotic arm gripper (51) is arranged adjacent to the needle column detection device (1) and the rejection robotic arm gripper; the unloading robotic arm gripper (51) takes qualified products from the platform of the needle column detection device (1) and puts them back into the conveyor line (41); the rejection robotic arm gripper (52) takes unqualified products from the platform of the needle column detection device (1) and puts them into the waste box (53).

20. The needle column detection system according to claim 19, characterized in that, It also includes: the detection platform (6); The needle column detection device (1), the host computer (3), the loading robotic arm gripper (42), the unloading robotic arm gripper (51), and the rejection robotic arm gripper (52) are mounted on the detection platform (6).

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