CN105891224B - It is a kind of using single optic path detect guard frame rail mounting hole whether qualified device - Google Patents

Abstract

The invention discloses a device for detecting whether the installation hole of a shelf beam is qualified by using a single optical path transmission, which includes a base, a conveyor belt, a proximity switch, a stopper, a push cylinder, a measuring bracket, a gantry, an image shooting module, a closed casing and Compress the cylinder, the image capture module includes a parallel light source, an industrial camera and a mirror group, and the parallel light emitted by the parallel light source passes through the second mounting hole, the second mirror, the third mirror, the third mounting hole, and the fourth mirror in sequence , the fifth reflector, the sixth installation hole, the sixth reflector, the first reflector and the first installation hole and then illuminate the industrial camera. The invention has simple and compact structure, low production cost, and the detection process of the mounting holes is carried out continuously on-line without interrupting the production process, which greatly improves the production efficiency and detection efficiency, and uses the detection results for real-time monitoring, effectively avoiding continuous discontinuity in the production process. The qualified phenomenon improves the production quality.

Description

A device that uses single optical path transmission to detect whether the installation hole of the shelf beam is qualified

technical field

The invention relates to the field of shelf production, and more specifically relates to a device for detecting whether a shelf crossbeam mounting hole is qualified by using a single optical path transmission.

Background technique

Modern large-scale production promotes the socialization, specialization, high mechanization and automation of industrial production, which requires that the supply of materials should be distributed in a timely, rapid and accurate manner, and also promotes the rapid development of storage technology. As a member of storage equipment, steel shelves are an indispensable part of modern logistics centers and distribution centers. Shelves are an important tool for warehouse modernization and efficiency improvement. Shelves generally refer to shelves for storing goods, and shelves are storage equipment for storing items. For example, in general stores, goods are often displayed on shelves. In order to improve the display of goods and facilitate loading and unloading of goods, a large number of different components are used. Among them, whether the length of the shelf beam is qualified or not directly affects the ability of the shelf. Normal installation will affect the final quality of the shelf.

Existing shelf beams are basically made of sheet metal components after rapid stamping and cutting. The shape of the shelf beams is long strips, with a pair of mounting holes at both ends, and one side of the long strips is turned up to form a support surface. To strengthen the load-bearing capacity of the beam, several pairs of mounting holes are also arranged on its supporting surface. The length of the shelf beam is a very important indicator of whether the shelf beam is qualified. At the same time, the position of the installation hole must be very accurate when the length is qualified. However, the shelf beam needs to go through three processes of stamping, punching and cutting in the production process. The length detection process of the shelf beam is measured after all processes are completed. The measurement method is often manual sampling inspection; because the length detection is It is carried out after all the processes are completed. Therefore, once a fault occurs in a certain process in the production and is not found in time, it will lead to batches of unqualified products. Qualified devices are particularly necessary.

The purpose of this utility model is to automatically and continuously detect a sheet metal strip shelf beam with a pair of installation holes at both ends, so as to know whether there is a failure in time, so as to timely feedback control the pre-process.

Since the position of the installation hole of the shelf beam is fixed, just use the self-learning method to select a standard part, use an industrial camera to take pictures of the standard hole, as a standard picture, and use an industrial camera when inspecting the shelf beam to be tested. The photographed picture is compared with the standard picture, so that the length of the shelf beam to be tested can be judged by whether the position of the mounting hole is deviated from the standard part, and the mounting hole can be judged by observing whether the photographed mounting hole is defective Eligibility.

However, the holes captured by an industrial camera are discrete holes, and the distance between the two installation holes captured by the same industrial camera is relatively large, resulting in difficult image processing and low precision, and the use of high-precision industrial cameras is bound to cause Increase the overall cost, so it does not meet the actual production needs.

Contents of the invention

The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and provide a device that uses single optical path transmission to detect whether the installation hole of the shelf beam is qualified. The device uses an industrial camera to accurately measure the position of the shelf beam installation hole after the cutting process , and the device does not require manual operation and has a high degree of automation. It can know whether the shelf beam is qualified in time to adjust other pre-processes in time, thereby improving the overall production quality of the shelf beam.

The technical solution of the present invention is achieved in the following way: a device for detecting whether the installation hole of the beam of the shelf is qualified by using single optical path transmission, including a base, a conveyor belt, a proximity switch, a stopper, a push cylinder, a measuring bracket, a gantry, and an image capture Module, closed case and pressing cylinder, the closed case is fixed on the base, and the conveyor belt, proximity switch, block, measuring bracket, gantry, image capture module and pressing cylinder are all arranged in the closed case Inside the body; the conveyor belt is arranged on the base, the feed port of the conveyor belt is connected to the discharge port of the pre-cutting process, and the end of the conveyor belt is sequentially provided with a proximity switch and a stopper along the direction of the conveyor belt. The switch is embedded in the base and is used to detect whether there is a workpiece passing on the base at the corresponding position; the stopper is fixed above the base and used to limit the workpiece; one side of the conveyor belt is provided with a The set pushing cylinder is provided with a measuring bracket on the other side. After the proximity switch is triggered, the movement of the pushing cylinder is controlled, and the pushing cylinder pushes the shelf beam to be measured on the conveyor belt to the measuring bracket; the pressing cylinder is arranged on the measuring bracket. On the frame and close to the feeding port of the conveyor belt, the compression cylinder is used to compress the workpiece along the moving direction of the conveyor belt; the gantry frame is fixed directly above the measuring bracket, and the left and right ends of the gantry frame are fixed by two brackets On the base; the two ends of the measuring bracket are connected to the base through two rotating shafts, the turning drive module is respectively connected to the base and the measuring bracket, and the turning driving module drives the measuring bracket to rotate along the two rotating shafts when moving;

The image capture module includes a parallel light source, an industrial camera and a reflector group. The parallel light source and the industrial camera are all arranged at the bottom of the measurement bracket, and the workpiece is provided with four installation holes, which are respectively the first installation hole, the second installation hole and the second installation hole. Two installation holes, the third installation hole and the fourth installation hole, each reflector in the reflector group is inclined at 45 degrees with the horizontal plane, and the reflector group includes a first reflector, a second reflector, The third reflecting mirror, the fourth reflecting mirror, the fifth reflecting mirror and the sixth reflecting mirror, the heights of the first reflecting mirror, the second reflecting mirror, the third reflecting mirror and the sixth reflecting mirror are the same and are all located at the measurement Above the bracket, the fourth reflector and the fifth reflector have the same height and are located below the measurement bracket, the first reflector is arranged directly above the first mounting hole, and the industrial camera It is arranged directly below the first reflector, the second reflector is arranged directly above the second installation hole, the parallel light source is arranged directly below the second installation hole, and the third reflector is arranged on the third directly above the installation hole, the fourth reflector is installed directly below the third installation hole, the fifth reflector is installed directly below the fourth installation hole, and the sixth reflector is installed in the fourth installation hole directly above; the parallel light emitted by the parallel light source passes through the second mounting hole, the second reflector, the third reflector, the third mount hole, the fourth reflector, the fifth reflector, the sixth mount hole, the The six reflective mirrors, the first reflective mirror and the first mounting hole are then irradiated onto the industrial camera.

Further, the first reflector and the second reflector are installed on the gantry frame through the first reflector mount, and the third reflector, the fourth reflector, the fifth reflector and the sixth reflector are all passed through the first reflector mount. The mounting base of the second mirror group is installed on the gantry frame.

Further, it also includes a screw driving device, the screw driving mechanism includes a positioning motor, a coupling and a ball screw, the ball screw is arranged in parallel with the conveyor belt, and the ball screw is fixed on the camera through a bearing seat On the fixed frame, one end of the ball screw is connected to the positioning motor through a coupling, a slider is set on the ball screw, the second mirror group mounting seat is fixedly connected to the slider, and the positioning motor drives the When the ball screw rotates, it drives the mounting seat of the second mirror group connected with the slider to move linearly along the ball screw above the measuring bracket.

Further, the push cylinder is arranged in the middle of the conveyor belt, and the front end of the push cylinder is provided with a first push plate.

Further, a slope surface is provided on a side of the measuring bracket close to the conveyor belt.

Further, limit baffles are provided on the left and right sides of the feed inlet of the conveyor belt.

Further, the measuring bracket is provided with L-shaped ribs, the two ribs of the L-shaped ribs are perpendicular to each other, and one rib of the L-shaped rib is used to push the cylinder to compress the workpiece at the other end of the workpiece. Limit, the other rib of the L-shaped rib is used to limit the other end of the workpiece when the compression cylinder compresses the workpiece.

Further, the slider is provided with a U-shaped groove, and the bottom of the camera holder is provided with a bar-shaped slider, and the slider is set on the bar-shaped slide rail through the U-shaped groove.

Further, the measuring bracket is provided with a magnetic scale, and the end of the piston rod of the pressing cylinder is connected to a second pusher plate, and the second pusher plate is provided with a magnetic scale matched with the magnetic scale. grid head.

Further, the turning drive module includes a first support, a second support and a turning cylinder, the first support is fixed on the base, the second support is fixed on the measurement bracket, and the two ends of the turning cylinder are respectively connected to the first A support and a second support are hinged.

In the pre-cutting process, the workpiece will be cut from a whole long strip-shaped sheet metal part into individual workpieces. After the workpiece completes the cutting process, the cut workpiece will still be pushed by the uncut long strip-shaped sheet metal part. It moves forward and enters the feed port at the front end of the conveyor belt from the outlet of the pre-cutting process. The movement direction of the workpiece is restricted by two limit baffles so that it will not deviate. The workpiece passes through the two limit baffles Enter the detection device; after the workpiece enters the conveyor belt, it will be driven by the conveyor belt to accelerate the movement. The moving speed set by the conveyor belt is 1.5-2 times the speed of the workpiece at the outlet in the pre-cutting process. The workpiece is driven by the acceleration of the conveyor belt. Entering the detection device, passing the proximity switch and reaching the position of the stopper, it is blocked by the stopper and cannot continue to move. The proximity switch receives the signal of the workpiece passing and transmits the signal to the controller. The controller controls the push cylinder to start moving, and the push cylinder Push the workpiece from the conveyor belt to the measuring bracket and be blocked by one of the L-shaped ribs of the measuring bracket. At this time, the cylinder moves to press the workpiece to the other L-shaped rib of the measuring bracket When the pressing cylinder and the pushing cylinder have completed the pressing operation, the workpiece is in the measuring position; when the workpiece reaches the measuring position, the parallel light is reflected by the reflector group, so that the parallel light passes through the four installations in sequence. Holes, through the industrial camera to detect the image formed after passing through the four installation holes in sequence, and compare and analyze the image with the standard image, so as to judge whether the installation hole is qualified; if the captured image is the same as the standard image, it means The installation hole of the shelf beam to be tested is qualified. If the captured image is different from the standard image, and the image has missing corners or inconsistent centers, it means that the installation hole of the shelf beam to be tested is unqualified.

The beneficial effects of the present invention are:

1. The structure of the present invention is simple and compact, and the production cost is low. The detection process of the installation hole is continuously carried out online without interrupting the production process, which greatly improves the production efficiency and detection efficiency, and uses the detection results for real-time monitoring, effectively avoiding the occurrence of The continuous unqualified phenomenon improves the production quality.

2. The present invention uses mirror groups to reflect parallel light rays, so that the parallel light passes through four mounting holes in sequence, and detects the image formed after passing through the four mounting holes in sequence through an industrial camera, and compares the image with the standard image analysis, so as to judge whether the installation hole is qualified; if the captured image is the same as the standard image, it means that the installation hole of the shelf beam to be tested is qualified; if the captured image is different from the standard image, the image has a missing corner or the center of the circle is inconsistent In the case of , it means that the installation hole of the shelf beam to be tested is unqualified; the detection process is convenient and the detection accuracy is high.

3. The present invention realizes the automatic feeding, automatic detection and automatic unloading of the detection process. The whole process does not require manual processing, and avoids measurement errors caused by various human factors that are prone to occur in manual detection; the entire device is highly automated and greatly The detection efficiency and detection quality are improved.

4. The present invention adjusts the position of part of the mirror group through the screw drive mechanism, which can meet the detection of shelf beams of different sizes, and improves the applicability of the detection equipment.

5. The present invention uses a closed casing to isolate the entire measurement device from the outside world, providing a closed measurement environment, which not only isolates light, avoids the influence of external light interference on the measurement results, but also prevents the external environment from polluting the detection device , improve the service life of the equipment.

6. Use an industrial camera to shoot the overlapping light beams, which can take a larger image of the installation hole, thereby improving the accuracy of judgment.

Description of drawings

The present invention will be described in further detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

Fig. 1 is a perspective view of a device of the present invention that utilizes single optical path transmission to detect whether the installation holes of shelf beams are qualified.

Fig. 2 is a front view of a device of the present invention that utilizes single optical path transmission to detect whether the mounting holes of shelf crossbeams are qualified.

Fig. 3 is a top view of a device for detecting whether the installation hole of the shelf crossbeam is qualified by using single optical path transmission according to the present invention.

Fig. 4 is a bottom view of a device of the present invention that uses single optical path transmission to detect whether the installation holes of the beams of the shelves are qualified.

Fig. 5 is a schematic diagram of an optical path of a device for detecting whether the installation hole of a shelf beam is qualified by using a single optical path transmission according to the present invention.

In the figure, 1-base, 2-workpiece, 3-conveyor belt, 4-push cylinder, 5-measurement bracket, 6-industrial camera, 7-pressing cylinder, 8-proximity switch, 9-block, 10- Camera holder, 11-positioning motor, 12-ball screw, 13-coupling, 14-slider, 15-limit baffle, 16-L-shaped rib, 17-bracket, 18-bearing seat, 19 -The first pusher plate, 20-the second pusher plate, 21-strip slide rail, 22-through hole, 23-first support, 24-second support, 25-overturn cylinder, 26-parallel light source , 27-first reflector, 28-second reflector, 29-third reflector, 30-fourth reflector, 31-fifth reflector, 32-sixth reflector.

Detailed ways

Below in conjunction with accompanying drawing, the present invention is further described:

Referring to Figs. 1 to 5, a device of the present invention that uses single optical path transmission to detect whether the installation hole of the shelf beam is qualified or not includes a base 1, a conveyor belt 3, a proximity switch 8, a stopper 9, a push cylinder 4, and a measuring bracket 5 , gantry frame, image capture module, closed housing and compression cylinder 7, the closed housing is fixed on the base 1, the conveyor belt 3, proximity switch 8, block 9, measuring bracket 5, gantry frame, The image capture module and the compression cylinder 7 are all arranged inside the closed housing; the conveyor belt 3 is arranged on the base 1, the feed port of the conveyor belt 3 is connected to the discharge port of the pre-cutting process, and the conveyor belt 3 Proximity switches 8 and stoppers 9 are sequentially provided at the end along the direction of the conveyor belt 3. The proximity switches 8 are embedded in the base 1 and are used to detect whether there is a workpiece 2 passing by on the base 1 at the corresponding position. The stoppers 9 are fixed on The top of the base 1 is used to limit the workpiece 2; one side of the conveyor belt 3 is provided with a push cylinder 4 perpendicular to the conveying direction of the conveyor belt 3, and the other side is provided with a measuring bracket 5. After the proximity switch 8 is triggered Control pushes cylinder 4 motions, and pushes cylinder 4 and pushes the shelf crossbeam to be measured on conveyor belt 3 onto measuring bracket 5; Described compression cylinder 7 is arranged on measuring bracket 5 and near the feeding port of conveyor belt 3, The compression cylinder 7 is used to compress the workpiece 2 along the moving direction of the conveyor belt 3; the gantry is fixed directly above the measuring bracket 5, and the left and right ends of the gantry are fixed on the base 1 by two supports 17; The two ends of the measuring bracket 5 are connected to the base 1 through two rotating shafts, and the turning drive module is connected to the base 1 and the measuring bracket 5 respectively, and the measuring bracket 5 is driven to rotate along the two rotating shafts when the turning driving module moves. .

The image capturing module includes a parallel light source, an industrial camera 6 and a reflector group, the parallel light source and the industrial camera 6 are all arranged at the bottom of the measurement bracket 5, and the workpiece 2 is provided with four installation holes, respectively for the first Mounting holes, the second mounting hole, the third mounting hole and the fourth mounting hole, the measuring bracket 2 is also provided with two through holes 22, and the two through holes 22 are used for parallel light rays to pass through the measuring bracket 2. Each mirror in the reflector group is inclined at 45 degrees with the horizontal plane, and the reflector group includes a first reflector 27, a second reflector 28, a third reflector 29, a fourth reflector 30, a fifth The mirror 31 and the sixth mirror 32, the first mirror 27, the second mirror 28, the third mirror 29 and the sixth mirror 32 have the same height and are all located above the measuring bracket 5, The fourth reflector 30 and the fifth reflector 31 have the same height and are located below the measurement bracket 5, the first reflector 27 is arranged directly above the first mounting hole, and the industrial camera 6 It is arranged directly below the first reflector 27, the second reflector 28 is arranged directly above the second installation hole, the parallel light source is arranged directly below the second installation hole, and the third reflector 29 is arranged Directly above the third mounting hole, the fourth reflecting mirror 30 is installed directly below the third mounting hole, the fifth reflecting mirror 31 is installed directly below the fourth mounting hole, and the sixth reflecting mirror 32 Installed directly above the fourth mounting hole; the parallel light emitted by the parallel light source passes through the second mounting hole, the second reflector 28, the third reflector 29, the third mount hole, the fourth reflector 30, the fifth The reflective mirror 31 , the sixth mounting hole, the sixth reflective mirror 32 , the first reflective mirror 27 and the first mounting hole irradiate onto the industrial camera 6 .

The first reflector 27 and the second reflector 28 are all installed on the gantry frame by the first reflector mount, the third reflector 29, the fourth reflector 30, the fifth reflector 31 and the sixth reflector 32 They are all installed on the gantry through the second mirror group mount.

This device also comprises screw driving device, and described screw driving mechanism comprises positioning motor 11, shaft coupling 13 and ball screw 12, and described ball screw 12 is arranged in parallel with conveyer belt 3, and described ball screw 12 passes through The bearing seat 18 is fixed on the camera holder 10, one end of the ball screw 12 is connected to the positioning motor 11 through a coupling 13, the ball screw 12 is covered with a slider 14, and the second lens group mounting seat Fixedly connected with the slider 14 , the positioning motor 11 drives the ball screw 12 to rotate and drives the second mirror group mounting seat connected to the slider 14 to move linearly above the measuring bracket 5 along the ball screw 12 .

The pushing cylinder 4 is arranged in the middle of the conveyor belt 3 , and the front end of the pushing cylinder 4 is provided with a first pushing plate 19 . The position of the push cylinder 4 is not limited to the middle part of the conveyor belt 3, but also can be the direction in which the middle part of the conveyor belt 3 is close to the discharge end, and its position is adjustable; the position of the push cylinder 4 mainly depends on the length of the workpiece to be detected. As long as it is ensured that the distance between the push cylinder 4 and the stopper 9 is equal to half of the workpiece length during cylinder 4 position adjustment, it can be guaranteed that the push cylinder 4 is always in the middle of the workpiece when pushing the workpiece. The contact surface of the first pusher plate 19 and the workpiece 2 is a plane perpendicular to the base 1, and the contact surface of the first pusher plate 20 with the workpiece is parallel to the moving direction of the conveyor belt. The material plate 20 pushes the workpiece horizontally toward the measuring bracket 5 .

A slope surface is provided on the side of the measuring bracket 5 close to the conveyor belt 3 . When the measurement bracket 5 rotates around the rotation axis under the action of the overturning drive module, if there is no effect of the slope surface, it will inevitably cause contact between the edge of the measurement bracket 5 and the base 1, causing the rotation to not proceed normally; It is convenient for the workpiece 2 to enter the measuring bracket 5 from the base 1 and prevent the workpiece from being stuck at the joint between the base 1 and the measuring bracket 5 .

Limiting baffles 15 are provided on the left and right sides of the feeding port of the conveyor belt 3 . The two limit baffles 15 are arranged in parallel, and the distance between the two limit baffles 15 is equal to or slightly greater than the width of the conveyor belt.

The measuring bracket 5 is provided with an L-shaped rib 16, two ribs of the L-shaped rib 16 are perpendicular to each other, and one rib of the L-shaped rib 16 is used to push the cylinder 4 to compress the workpiece 2 when the workpiece 2. The spacing of the other end, the other rib of the L-shaped rib 16 is used for the spacing of the other end of the workpiece 2 when the compression cylinder 7 compresses the workpiece 2.

The slider 14 is provided with a U-shaped groove, and the bottom of the camera holder 10 is provided with a bar-shaped slider 14 , and the slider 14 is set on the bar-shaped slide rail 21 through the U-shaped groove. The slide block 14 makes linear motion back and forth along the direction parallel to the moving direction of the conveyor belt under the joint action of the strip slide rail 21 and the ball screw 12 .

The measuring bracket 5 is provided with a magnetic scale, and the end of the piston rod of the pressing cylinder 7 is connected to the second pushing plate 20, and the second pushing plate 20 is provided with a magnetic scale that matches the magnetic scale. Magnetic head. When the compression cylinder 7 moves, it drives the second pusher plate 20 at the front end of the compression cylinder 7 to move. When the second pusher plate 20 moves, it drives the magnetic grid head to move synchronously. The magnetic grid head detects the moving distance of the compression cylinder 7, and according to the pressure The length of the workpiece can be calculated from the data of the magnetic scale when the initial position of the cylinder 7 is tightened. The main function of the magnetic scale is to measure the length of the standard workpiece when replacing and measuring workpieces of different sizes.

Described overturn drive module comprises first support 23, second support 24 and overturn cylinder 25, and first support 23 is fixed on the base 1, and second support 24 is fixed on the measuring bracket 5, and the overturn cylinder 25 Both ends are hinged to the first support 23 and the second support 24 respectively. The bottom of the overturning cylinder 25 is hinged with the first support 23, and the piston rod end of the overturning cylinder 26 is hinged with the second support 24. The first support 23 is fixed, and will rotate around the first support when the overturning cylinder 25 moves. The support 23 rotates, and the end of the piston rod of the overturning cylinder 25 will drive the second support 29 to rotate circularly at a certain angle around the two rotation axes of the measuring bracket. It can be rotated within the range to facilitate the unloading process.

The above examples are preferred implementations of the present invention, and are only used to illustrate the present invention conveniently, and are not intended to limit the present invention in any form. Anyone with ordinary knowledge in the technical field, if they do not depart from the present invention, Within the scope of the technical features, the equivalent embodiments that utilize the technical content disclosed in the present invention to make partial changes or modifications without departing from the technical features of the present invention still belong to the scope of the technical features of the present invention.

Claims (10)

1. A device that utilizes single optical path transmission to detect whether the installation hole of the beam of the shelf is qualified, characterized in that it includes a base (1), a conveyor belt (3), a proximity switch (8), a stopper (9), and a push cylinder (4 ), measuring bracket (5), gantry, image capture module, closed housing and compression cylinder (7), the closed housing is fixed on the base (1), the conveyor belt (3), proximity switch (8), stopper (9), measuring bracket (5), gantry frame, image capture module and compression cylinder (7) are all set inside the closed casing; the conveyor belt (3) is set on the base (1 ), the feed port of the conveyor belt (3) is connected to the discharge port of the pre-cutting process, and the end of the conveyor belt (3) is sequentially provided with a proximity switch (8) and a stopper ( 9), the proximity switch (8) is embedded on the base (1) and is used to detect whether there is a workpiece (2) passing on the base (1) at the corresponding position, and the stopper (9) is fixed on the base (1) above and used to limit the workpiece (2); one side of the conveyor belt (3) is provided with a push cylinder (4) perpendicular to the conveying direction of the conveyor belt (3), and the other side is provided with a measuring bracket ( 5), the proximity switch (8) is triggered to control the movement of the pushing cylinder (4), and the pushing cylinder (4) pushes the beam of the shelf to be measured on the conveyor belt (3) to the measuring bracket (5); the pressing cylinder (7) Set on the measuring bracket (5) and close to the feeding port of the conveyor belt (3), the pressing cylinder (7) is used to compress the workpiece (2) along the moving direction of the conveyor belt (3); The gantry is fixed directly above the measuring bracket (5), and the left and right ends of the gantry are fixed on the base (1) by two brackets (17); the two ends of the measuring bracket (5) are rotated by two The shaft is connected to the base (1), the turning drive module is respectively connected to the base (1) and the measuring bracket (5), and the turning driving module drives the measuring bracket (5) to rotate along the two rotation axes when moving; The image capturing module includes a parallel light source, an industrial camera (6) and a mirror group, the parallel light source and the industrial camera (6) are both arranged at the bottom of the measurement bracket (5), and four installation holes, respectively the first installation hole, the second installation hole, the third installation hole and the fourth installation hole, each reflector in the reflector group is inclined at 45 degrees with the horizontal plane, and the reflector The set includes a first mirror (27), a second mirror (28), a third mirror (29), a fourth mirror (30), a fifth mirror (31) and a sixth mirror (32), The first reflecting mirror (27), the second reflecting mirror (28), the third reflecting mirror (29) and the sixth reflecting mirror (32) have the same height and are located above the measuring bracket (5), The fourth reflector (30) and the fifth reflector (31) have the same height and are located below the measurement bracket (5), and the first reflector (27) is arranged in the first installation hole Directly above, the industrial camera (6) is disposed directly below the first reflector (27), the second reflector (28) is disposed directly above the second mounting hole, and the parallel light source is disposed at the second directly below the installation hole, the third reflector (29) is arranged directly above the third installation hole, the fourth reflector (30) is installed directly below the third installation hole, and the fifth reflector (31) is installed directly below the fourth installation hole, and the sixth reflector (32) is installed directly above the fourth installation hole; the parallel light emitted by the parallel light source passes through the second installation hole and the second reflection mirror in turn. mirror (28), third reflector (29), third mounting hole, fourth reflector (30), fifth reflector (31), sixth mounting hole, sixth reflector (32), first reflector The mirror (27) and the first mounting hole are irradiated onto the industrial camera (6). 2. The device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 1, characterized in that: the first reflector (27) and the second reflector (28) pass through the first The reflector mount is installed on the gantry, and the third reflector (29), the fourth reflector (30), the fifth reflector (31) and the sixth reflector (32) are installed through the second mirror group mount On the gantry. 3. A device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 2, characterized in that it also includes a screw drive device, and the screw drive mechanism includes a positioning motor (11), a joint Shaft (13) and ball screw (12), the ball screw (12) is set parallel to the conveyor belt (3), the ball screw (12) is fixed on the camera holder ( 10), one end of the ball screw (12) is connected to the positioning motor (11) through a coupling (13), and a slider (14) is set on the ball screw (12), and the second mirror The group mounting seat is fixedly connected with the slider (14), and the positioning motor (11) drives the ball screw (12) to rotate to drive the second mirror group mounting seat connected to the slider (14) on the measuring bracket. The top of the frame (5) moves linearly along the ball screw (12). 4. A device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 1, characterized in that: the push cylinder (4) is set in the middle of the conveyor belt (3), and the push cylinder The front end of (4) is provided with a first pushing plate (19). 5. The device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 1, characterized in that: the side of the measuring bracket (5) close to the conveyor belt (3) is provided with slope surface. 6. A device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 1, characterized in that: the left and right sides of the feeding port of the conveyor belt (3) are provided with limit baffles (15). 7. A device for detecting whether the installation hole of the shelf beam is qualified by using a single optical path transmission according to claim 1, characterized in that: the measuring bracket (5) is provided with an L-shaped rib (16), and the The two ribs of the L-shaped rib (16) are perpendicular to each other, and one rib of the L-shaped rib (16) is used to limit the other end of the workpiece (2) when the cylinder (4) presses the workpiece (2). Another rib of the L-shaped rib (16) is used for the spacing of the other end of the workpiece (2) when the compression cylinder (7) compresses the workpiece (2). 8. A device for detecting whether the installation hole of the shelf beam is qualified by using a single optical path transmission according to claim 3, characterized in that: the slider (14) is provided with a U-shaped groove, and the camera holder (10) A bar-shaped slider (14) is provided at the bottom, and the slider (14) is set on the bar-shaped slide rail (21) through a U-shaped groove. 9. A device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 1, characterized in that: the measuring bracket (5) is provided with a magnetic scale, and the pressing cylinder ( 7) The end of the piston rod is connected to the second pushing plate (20), and the second pushing plate (20) is provided with a magnetic grating head matched with the magnetic grating ruler. 10. The device for detecting whether the installation hole of the shelf beam is qualified by using single optical path transmission according to claim 1, characterized in that: the flip drive module includes a first support (23), a second support (24) and the overturning cylinder (25), the first support (23) is fixed on the base (1), the second support (24) is fixed on the measuring bracket (5), and the two ends of the overturning cylinder (25) are respectively connected with the first A support (23) and a second support (24) are hinged.