CN205718838U - A kind of semipermeable membrane is utilized to judge the device that guard frame rail is the most qualified - Google Patents

Abstract

The utility model discloses and a kind of utilize semipermeable membrane to judge the device that guard frame rail is the most qualified, this device includes base, conveyer belt, proximity switch, block, propelling movement cylinder, measures bracket, camera installing rack, the first industrial camera, the second industrial camera, source of parallel light, semipermeable membrane, leading screw driving module, compression cylinder and upset driving module, and the end of described conveyer belt sets gradually proximity switch and block along the conveyer belt direction of motion；The side of described conveyer belt is provided with propelling movement cylinder, and opposite side is provided with measurement bracket；Described compression cylinder is arranged on to be measured on bracket and the charging aperture of close conveyer belt；Described camera installing rack is fixed on directly over measurement bracket, and described first industrial camera is fixed on one end of camera installing rack, and described leading screw drives module to be fixed on camera installing rack.This utility model is simple and compact for structure, and production cost is low；Length detection process is carried out the most automatically, it is not necessary to interrupt production process, improves measurement and production efficiency.

Description

A device for judging whether the shelf beam is qualified by using a semi-permeable membrane

technical field

The utility model relates to the field of shelf production, in particular to a device for judging whether a shelf beam is qualified by using a semipermeable membrane.

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.

Utility model content

The purpose of this utility model is to provide a device for judging whether the shelf beam is qualified by using a semi-permeable membrane in view of the above-mentioned deficiencies in the prior art. The device uses an industrial camera to accurately check the length of the shelf beam and the position of the installation hole Measurement, 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 scheme of the utility model is realized in the following way: a device for judging whether the shelf beam is qualified by using a semi-permeable membrane, including a base, a conveyor belt, a proximity switch, a stopper, a push cylinder, a measuring bracket, a camera mounting frame, a first Industrial camera, second industrial camera, parallel light source, semi-permeable membrane, lead screw drive module, compression cylinder and flip drive module, the conveyor belt is set on the base, and the feed port of the conveyor belt is connected to the pre-cutting process The end of the conveyor belt is provided with a proximity switch and a stopper in sequence along the moving direction of the conveyor belt. The proximity switch is embedded in the base and is used to detect whether there is a workpiece passing through the base. The stopper is fixed on the base. The upper part is used to limit the position of the workpiece; one side of the conveyor belt is provided with a push cylinder perpendicular to the conveying direction of the conveyor belt, and the other side is provided with a measuring bracket. After the proximity switch is triggered, the movement of the push cylinder is controlled to push The cylinder pushes the workpiece on the conveyor belt to the measuring bracket; the pressing cylinder is arranged on the measuring bracket and close to the feeding port of the conveyor belt, and the pressing cylinder is used to compress the workpiece along the moving direction of the conveyor belt; The camera mounting frame is fixed directly above the measuring bracket, the left and right ends of the camera mounting frame are fixed on the base through two brackets, the first industrial camera is fixed at one end of the camera mounting frame, and the screw drive module is fixed On the camera mounting frame; the screw drive module includes a positioning motor, a shaft coupling and a ball screw, the positioning motor is fixed on the camera mounting frame, and the ball screw is fixed on the camera mounting frame through two bearing seats. The ball screw is set parallel to the conveyor belt, the positioning motor is connected to the ball screw through a coupling, the ball screw is fitted with a slider, the second industrial camera is fixedly connected to the slider, and the positioning motor drives the ball screw to rotate The second camera is driven to move linearly along the ball screw; the two ends of the measuring bracket are connected to the base through two rotating shafts, and the turning drive module is connected to the base and the measuring bracket respectively. When the turning driving module moves driving the measuring bracket to rotate along two rotation axes;

The measuring bracket is provided with two light-transmitting holes, and the two light-transmitting holes are respectively arranged directly below the first industrial camera and the second industrial camera, and a parallel light source is arranged directly below the two light-transmitting holes. There are two semi-permeable membranes, and the two semi-permeable membranes are respectively arranged directly under the cameras of the first industrial camera and the second industrial camera. The parallel light rays emitted by the two parallel light sources vertically upward pass through the mounting holes on the workpiece and then irradiate them respectively. The first industrial camera and the second industrial camera are used to capture images formed on the surfaces of the two semipermeable membranes to the bottom surfaces of the two semipermeable membranes and form images on the surfaces of the two semipermeable membranes.

Further, the two semi-permeable membranes are respectively installed on the camera heads of the first industrial camera and the second industrial camera through the semi-permeable membrane mounts.

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

Further, two limit baffles are arranged at both ends of the feeding port of the conveyor belt, and the two limit baffles are arranged in parallel, and the distance between the two limit baffles is equal to the width 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 limit the position of the other end of the workpiece when the cylinder is pushed to compress the workpiece. , 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 surface of the conveyor belt is on the same level as the base.

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

Further, through holes are also provided on the measurement bracket below the first industrial camera and the second industrial camera.

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 measuring bracket, and the two ends of the turning cylinder are respectively connected to the second A support and a second support are hinged.

The technical concept of the utility model is: the workpiece will be cut into individual workpieces by an integral long strip-shaped sheet metal part in the pre-cutting process, and after the workpiece completes the cutting process, the cut workpiece will still be uncut The strip-shaped sheet metal parts are pushed forward, and enter the feed port at the front end of the conveyor belt from the discharge port of the pre-cutting process, and the movement direction of the workpiece is restricted by two limit baffles so that there will be no deviation. The workpiece enters the detection device through two limit baffles; after the workpiece enters the conveyor belt, it will be driven by the conveyor belt to accelerate the movement. Driven by the acceleration of the conveyor belt, it quickly enters the detection device, passes through the proximity switch and reaches the stop position, and 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. Control the push cylinder to start moving. The push cylinder pushes the workpiece from the conveyor belt to the measuring bracket and is blocked by one of the L-shaped ribs of the measuring bracket. At this time, the pressing cylinder moves to move the workpiece to the measuring bracket. The other side of the L-shaped rib is compressed in the direction. When the compression cylinder and the push cylinder have completed the compression operation, the workpiece is in the measurement position; turn on the parallel light source, and use the first industrial camera and the first industrial camera above the two ends of the measurement bracket. The second industrial camera shoots the semi-permeable membrane, and obtains the images of the mounting holes at both ends of the workpiece; performs image processing on the images taken by the first industrial camera and the second industrial camera, compares the two with the standard image, and judges the installation hole Whether there are defects in the position of the center point in the image, the size of the mounting hole, and the edge of the mounting hole, if the position of the center point of the mounting hole is consistent with the standard image, it means that the length of the workpiece is the same as the standard length, and the workpiece is qualified; If the position of the center point of the hole is different from the standard image, it means that the length of the workpiece is different from the standard length, and the workpiece is an unqualified workpiece; Unqualified workpiece.

After the measurement is completed, the push cylinder and the compression cylinder are quickly reset, the flip drive module moves, and the measurement bracket is driven to rotate and unload. After the blanking is completed, the flip drive module drives the measurement bracket to return to the initial position.

During the movement of the pressing cylinder, the magnetic grating head at the front end of the compressing cylinder will move on the magnetic scale. At this time, the length of the workpiece can be calculated according to the moving distance of the magnetic grating head, and the length can be read directly. Mainly It is used when setting standard parts.

The second industrial camera is arranged on the lead screw driving module, and is mainly used to adjust the distance between the second industrial camera and the first industrial camera, so as to adapt to the measurement of workpieces of different lengths.

The beneficial effects of the utility model are:

1. The utility model has simple and compact structure, low production cost, and 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 The phenomenon of continuous unqualified products has improved the production quality.

2. The utility model uses an industrial camera for image acquisition to detect the mounting holes, and judges whether the beam of the shelf to be tested is qualified through the position of the mounting hole on the image, and takes images of the mounting holes at both ends of the beam of the shelf to be tested The method of comparing with the standard image is used to judge whether there is a defect in the installation hole and whether the length of the workpiece to be tested is qualified. The detection process is convenient and the detection accuracy is high.

3. The utility model realizes the automatic feeding, automatic detection and automatic unloading of the detection process. The whole process does not need manual processing, which avoids the measurement errors caused by various human factors that are easy to occur in manual detection; the whole device has a high degree of automation and is extremely Greatly improved detection efficiency and detection quality.

4. The utility model uses a closed casing to isolate the entire measuring device from the outside world, providing a closed measuring environment, which not only isolates the light, but also avoids the influence of the interference of the external light on the measurement results, and can also prevent the external environment from affecting the detection device. Pollution increases the service life of the equipment.

5. The utility model uses a semi-permeable membrane to isolate the industrial camera from the detection device, which effectively reduces the pollution of the industrial camera and improves the service life of the entire equipment.

6. The utility model can adjust the distance between two industrial cameras through the screw drive module, so that the device is suitable for the detection of shelf beams of various sizes.

Description of drawings

The utility model will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but it does not constitute any limitation to the utility model.

Fig. 1 is a perspective view of a device for judging whether a shelf beam is qualified by using a semipermeable membrane according to the present invention.

Fig. 2 is a front view of a device for judging whether a shelf beam is qualified by using a semi-permeable membrane of the present invention.

Fig. 3 is a bottom view of a device for judging whether a shelf beam is qualified by using a semipermeable membrane of the present invention.

Fig. 4 is a top view of a device for judging whether a shelf beam is qualified by using a semipermeable membrane according to the present invention.

Fig. 5 is A-A sectional view of the utility model.

Fig. 6 is a schematic structural view of the measuring bracket of the present invention.

Fig. 7 is a schematic structural view of the slider of the present invention.

Fig. 8 is a schematic diagram of the connection between the slider of the present invention and the second industrial camera.

Fig. 9 is a schematic diagram of installation of the turning drive module of the present invention.

Fig. 10 is a schematic diagram of the optical path of the present invention.

In the figure, 1-base, 2-workpiece, 3-conveyor belt, 4-push cylinder, 5-measurement bracket, 6-first industrial camera, 7-second industrial camera, 8-pressing cylinder, 9-approach Switch, 10-block, 11-camera mount, 12-positioning motor, 13-ball screw, 14-coupling, 15-limit baffle, 16-L-shaped rib, 17-bracket, 18- Bearing seat, 19-slider, 20-the first pusher plate, 21-the second pusher plate, 22-slope surface, 23-strip slide rail, 24-through hole, 25-magnetic grating head, 26-magnetic Scale, 27-first support, 28-second support, 29-overturn cylinder, 30-semi-permeable film mounting seat, 31-semi-permeable film, 32-parallel light source.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

Referring to Figures 1 to 10, a device for judging whether a shelf beam is qualified by using a semi-permeable membrane of the present invention includes a base 1, a conveyor belt 3, a proximity switch 9, a stopper 10, a push cylinder 4, a measuring bracket 5, Camera mounting frame 11, first industrial camera 6, second industrial camera 7, parallel light source 32, semi-permeable membrane 31, lead screw drive module, compression cylinder 8 and flip drive module, 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 end of the conveyor belt 3 is sequentially provided with a proximity switch 9 and a stopper 10 along the moving direction of the conveyor belt 3, and the proximity switch 9 is embedded On the base 1 and used to detect whether there is a workpiece 2 passing on the base 1, the stopper 10 is fixed above the base 1 and used to limit the workpiece 2; one side of the conveyor belt 3 is provided with a The push cylinder 4 that conveying direction is provided with, the other side is provided with measuring bracket 5, control pushing cylinder 4 motion after described proximity switch 9 triggers, and pushing cylinder 4 pushes the workpiece 2 on the conveyor belt 3 onto the measuring bracket 5; The pressing cylinder 8 is arranged on the measuring bracket 5 and is close to the feeding port of the conveyor belt 3, and the pressing cylinder 8 is used to compress the workpiece 2 along the moving direction of the conveyor belt 3; the camera mounting frame 11 is fixed on Right above the measuring bracket 5, the left and right ends of the camera mounting frame 11 are fixed on the base 1 by two brackets 17, the first industrial camera 6 is fixed on one end of the camera mounting frame 11, and the screw drive module is fixed on On the camera mounting frame 11; the screw drive module includes a positioning motor 12, a shaft coupling 14 and a ball screw 13, the positioning motor 12 is fixed on the camera mounting frame 11, and the ball screw 13 is fixed on the camera mounting frame 11 by two bearing blocks 18. On the camera mounting frame 11, the ball screw 13 is arranged parallel to the conveyor belt 3, the positioning motor 12 is connected to the ball screw 13 through a coupling 14, the ball screw 13 is covered with a slide block 19, and the second industrial camera 7 is fixedly connected with the slider 19, and when the positioning motor 12 drives the ball screw 13 to rotate, it drives the second camera to move linearly along the ball screw 13; the two ends of the measuring bracket 5 pass through two rotating shafts The base 1 is connected, and the turning drive module is respectively connected to the base 1 and the measuring bracket 5. When the turning driving module moves, the measuring bracket 5 is driven to rotate along two rotation axes.

The measuring bracket 5 is provided with two light-transmitting holes, the two light-transmitting holes are arranged directly below the first industrial camera 6 and the second industrial camera 7 respectively, and parallel light sources are arranged directly below the two light-transmitting holes 32. There are two semi-permeable membranes 31, and the two semi-permeable membranes 31 are respectively arranged directly below the camera heads of the first industrial camera 6 and the second industrial camera 7, and the parallel light rays emitted by the two parallel light sources 32 vertically upward After passing through the installation hole on the workpiece 2, it is respectively irradiated on the bottom surface of two semi-permeable membranes 31 and is imaged on the surface of the two semi-permeable membranes 31. The first industrial camera 6 and the second industrial camera 7 are used to photograph the two semi-permeable membranes. The image formed on the surface of the film 31.

The two semi-permeable membranes 31 are respectively installed on the camera heads of the first industrial camera 6 and the second industrial camera 7 through the semi-permeable membrane mounts 30 . The two semi-permeable membrane mounts 30 respectively cover the camera heads of the first industrial camera 6 and the second industrial camera 7 .

The push cylinder 4 is arranged in the middle of the conveyor belt 3 , and the front end of the push cylinder 4 is provided with a first push plate 20 . 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. When cylinder 4 positions are adjusted, as long as it is ensured that the distance between push cylinder 4 and block 10 is equal to half of the workpiece length, it can be ensured that push cylinder 4 is always in the middle of the workpiece when pushing the workpiece. The contact surface of the first pusher plate 20 and the workpiece is a plane perpendicular to the working surface, and the contact surface of the first pusher plate 20 and the workpiece is parallel to the moving direction of the conveyor belt. When the push cylinder 4 moves, it directly passes through the first pusher. The plate 20 pushes the workpiece horizontally toward the measuring bracket 5 .

A slope surface 22 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 overturn drive module, if there is no effect of the slope surface 22, it will inevitably cause contact between the edge of the measurement bracket 5 and the base 1, causing the rotation to not proceed normally; The surface 22 can facilitate the workpiece 2 to enter the measuring bracket 5 from the base 1 and prevent the workpiece from being stuck at the connection between the base 1 and the measuring bracket 5 .

The two ends of the feed port of the conveyor belt 3 are provided with two limit baffles 15, the two limit baffles 15 are arranged in parallel, and the distance between the two limit baffles 15 is equal to the width of the conveyor belt 3 .

Described measuring bracket 5 is provided with L-shaped rib 16, and two ribs of L-shaped rib 16 are perpendicular to each other, and one rib of L-shaped rib 16 is used for pushing cylinder 4 to compress workpiece 2 when workpiece 2 is other. The spacing at one 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 8 compresses the workpiece 2.

The surface of the conveyor belt 3 is on the same level as the base 1 . The surface of the conveyor belt 3 can be slightly higher than the base 1-2mm, which is convenient for the transportation of the workpiece 2.

The slider 19 is provided with a U-shaped groove, and the bottom of the camera mounting frame 11 is provided with a bar-shaped slider 19 , and the slider 19 is set on the bar-shaped slide rail 23 through the U-shaped groove. Under the combined action of the strip guide rail 23 and the ball screw 13, the slider 19 is guaranteed to move linearly in a direction parallel to the moving direction of the conveyor belt 3 .

A through hole 24 is also provided on the measurement bracket 5 below the first industrial camera 6 and the second industrial camera 7 . A light source can be arranged below the through hole 24, which can improve the shooting effect of the first industrial camera 6 and the second industrial camera 7, and avoid inaccurate image processing judgment results due to the relatively close color of the workpiece 2 and the measuring bracket 5. Wherein the through hole below the first industrial camera 6 is a circular hole consistent with the size of the first industrial camera 6 cameras, the through hole below the second industrial camera 7 is a slot hole consistent with the width of the second industrial camera 7 cameras, and the slot hole The length is the same as the length range that the second industrial camera 7 moves along the ball screw, and when the second industrial camera 7 moves to any position, its lower part is within the range of the slot.

The measuring bracket 5 is provided with a magnetic scale 26, and the end of the piston rod of the pressing cylinder 8 is connected to a second pushing plate 21, and the second pushing plate 21 is provided with a magnetic scale 26 corresponding to the magnetic scale 26. Matched magnetic grid head 25. When the compression cylinder 8 moves, it drives the second pusher plate 21 at the front end of the compression cylinder 8 to move. When the second pusher plate 21 moves, it drives the magnetic grid head 25 to move synchronously. The magnetic grid head 25 detects the distance that the compression cylinder 8 moves. The length of the workpiece can be calculated according to the data of the magnetic scale 26 when the initial position of the cylinder 8 is pressed. The main function of the magnetic scale 26 is to measure the length of a standard workpiece when replacing and measuring workpieces of different sizes.

Described overturn drive module comprises first support 27, second support 28 and overturn cylinder 29, and first support 27 is fixed on the base 1, and second support 28 is fixed on the measuring bracket 5, and the overturn cylinder 29 Both ends are hinged to the first support 27 and the second support 28 respectively. The base of the overturning cylinder 29 is connected to the first support 27, and the end of the piston rod of the overturning cylinder 29 is connected to the second support 28. The first support 27 is fixed, and the overturning cylinder 29 itself will go around the first support when it moves. 27 rotates, and the piston rod end of the overturning cylinder 29 drives the second bearing 29 to rotate around the two rotating shafts on the measuring bracket 5, thereby realizing the rotating blanking of the measuring bracket 5. The overturn driving module adopts a cam mechanism, which can ensure that the measuring bracket rotates within a certain angle range.

The above-mentioned embodiments are preferred implementation modes of the present utility model, which are only used to facilitate the description of the present utility model, and are not intended to limit the present utility model in any form. Anyone with ordinary knowledge in the technical field, if they do not depart from this utility model Within the scope of the technical features mentioned in the utility model, the equivalent embodiments that make partial changes or modifications made by using the technical content disclosed in the utility model, and do not deviate from the technical features of the utility model, still belong to the technical features of the utility model In the range.

Claims (10)

1. A device that utilizes a semi-permeable membrane to judge whether the beam of a shelf is qualified, characterized in that it includes a base (1), a conveyor belt (3), a proximity switch (9), a stopper (10), a push cylinder (4), Measuring bracket (5), camera mounting frame (11), first industrial camera (6), second industrial camera (7), parallel light source (32), semi-permeable membrane (31), screw drive module, compression Cylinder (8) and overturn drive module, described conveyer belt (3) is arranged on the base (1), and the feeding port of described conveyer belt (3) connects the discharge port of pre-cutting process, and described conveyer belt ( 3) The end of the conveyor belt (3) is provided with a proximity switch (9) and a stopper (10) in sequence along the moving direction of the conveyor belt (3). The proximity switch (9) is embedded in the base (1) and is used to detect whether the base (1) is When a workpiece (2) passes by, the stopper (10) is fixed above the base (1) and is used to limit the workpiece (2); one side of the conveyor belt (3) is provided with a ) the push cylinder (4) that is set in the conveying direction, and the other side is provided with a measuring bracket (5). ) on the workpiece (2) is pushed onto the measuring bracket (5); the pressing cylinder (8) is arranged on the measuring bracket (5) and is close to the feeding port of the conveyor belt (3), and the pressing The cylinder (8) is used to compress the workpiece (2) along the moving direction of the conveyor belt (3); the camera mounting frame (11) is fixed directly above the measuring bracket (5), and the left and right ends of the camera mounting frame (11) Fixed on the base (1) by two brackets (17), the first industrial camera (6) is fixed on one end of the camera mounting frame (11), and the screw drive module is fixed on the camera mounting frame (11) The screw drive module includes a positioning motor (12), a shaft coupling (14) and a ball screw (13), the positioning motor (12) is fixed on the camera mount (11), and the ball screw (13) passes through Two bearing blocks (18) are fixed on the camera mounting frame (11), the ball screw (13) is arranged parallel to the conveyor belt (3), and the positioning motor (12) is connected to the ball screw through a shaft coupling (14) (13), the ball screw (13) is covered with a slide block (19), the second industrial camera (7) is fixedly connected with the slide block (19), and the positioning motor (12) drives the ball screw (13) ) rotates to drive the second industrial camera to move linearly along the ball screw (13); the two ends of the measuring bracket (5) are connected to the base (1) through two rotating shafts, and the turning drive module is respectively connecting the base (1) and the measuring bracket (5), and driving the measuring bracket (5) to rotate along the two rotation axes when the driving module is turned over; The measuring bracket (5) is provided with two light-transmitting holes, and the two light-transmitting holes are arranged directly below the first industrial camera (6) and the second industrial camera (7). Parallel light source (32) is arranged below, and described semi-permeable film (31) is provided with two, and two semi-permeable films (31) are respectively arranged on the first industrial camera (6) and the second industrial camera (7). Directly below the camera, the parallel light rays emitted vertically upward by the two parallel light sources (32) pass through the installation holes on the workpiece (2) and respectively shine on the bottom surfaces of the two semi-permeable films (31) and pass through the two semi-permeable films ( 31) for surface imaging, the first industrial camera (6) and the second industrial camera (7) are used to take images formed on the surfaces of the two semipermeable membranes (31). 2. A device for judging whether a shelf beam is qualified by using a semi-permeable membrane according to claim 1, characterized in that: two semi-permeable membranes (31) are respectively installed on the first industrial On the video camera of camera (6) and second industrial camera (7). 3. A kind of device that utilizes semi-permeable membrane to judge whether the shelf beam is qualified according to claim 1, it is characterized in that: said pushing cylinder (4) is arranged on the middle part of conveyer belt (3), pushes the cylinder (4) The front end is provided with a first pushing plate (20). 4. A device for judging whether a shelf beam is qualified by using a semipermeable membrane according to claim 1, characterized in that: the side of the measuring bracket (5) near the conveyor belt (3) is provided with a slope (22 ). 5. A kind of device utilizing semi-permeable membrane to judge whether the shelf beam is qualified according to claim 1, characterized in that: the two ends of the feeding port of the conveyor belt (3) are provided with two limit baffles ( 15), two limit baffles (15) are arranged in parallel, and the distance between the two limit baffles (15) is equal to the width of the conveyor belt (3). 6. A device for judging whether a shelf beam is qualified by using a semipermeable membrane according to claim 1, characterized in that: said measuring bracket (5) is provided with L-shaped ribs (16), L-shaped ribs The two ribs of (16) are perpendicular to each other, and one rib of the L-shaped rib (16) is used to push the cylinder (4) to press the workpiece (2) to limit the other end of the workpiece (2), and the L-shaped rib Another rib of (16) is used for the spacing of workpiece (2) other end when compression cylinder (8) compresses workpiece (2). 7. A device for judging whether a shelf beam is qualified by using a semi-permeable membrane according to claim 1, characterized in that: the slider (19) is provided with a U-shaped groove, and the bottom of the camera mounting frame (11) is provided with a U-shaped groove. There is a bar-shaped slide block (19), and the slide block (19) is sleeved on the bar-shaped slide rail (23) through a U-shaped groove. 8. A device for judging whether a shelf beam is qualified by using a semi-permeable membrane according to claim 1, characterized in that: the measuring bracket ( 5) A through hole (24) is also provided on the top. 9. A device for judging whether a shelf beam is qualified by using a semi-permeable membrane according to claim 1, characterized in that: the measuring bracket (5) is provided with a magnetic scale (26), and the pressing cylinder The end of the piston rod of (8) is connected with the second pusher plate (21), and the second pusher plate (21) is provided with a magnetic grating head (25) matched with the magnetic grating ruler (26). 10. A device for judging whether a shelf beam is qualified by using a semi-permeable membrane according to claim 1, characterized in that: the turning drive module includes a first support (27), a second support (28) and a turning Cylinder (29), the first support (27) is fixed on the base (1), the second support (28) is fixed on the measuring bracket (5), and the two ends of overturning cylinder (29) are respectively connected with the first support Seat (27) and second support (28) are hinged.