CN205843602U - A kind of plane mirror group 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 plane mirror group to judge the device that guard frame rail is the most qualified, including base, conveyer belt, proximity switch, block, propelling movement cylinder, measuring bracket, portal frame, image taking module, leading screw driving module, compression cylinder and upset driving module, image taking module includes industrial camera, the first reflecting mirror, the second reflecting mirror, the 3rd reflecting mirror and source of parallel light.This utility model utilizes principle that plane mirror reflects by close for the imaging of two distant installing holes, the installing hole size of industrial camera actual photographed is exaggerated many times than in the case of reflecting without plane mirror, the industrial camera using pixel relatively low also can take the image that definition is higher, reduces the cost of equipment；Utilize the principle of periscope by apart from far two pairs of mounting borescopic imaging in same industrial camera, on the one hand reduce equipment totle drilling cost, on the other hand have only to process piece image and i.e. can determine whether that guard frame rail is the most qualified, improves detection efficiency.

Description

A device for judging whether the beam of a shelf is qualified by using a plane mirror group

technical field

The utility model relates to the field of shelf production, in particular to a device for judging whether a shelf crossbeam is qualified by using a plane mirror group.

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.

Since the position of the installation hole of the shelf beam is relatively fixed relative to the position of the shelf beam, it is only necessary to use the self-learning method to perform self-learning on the known qualified standard parts, and fix the known qualified standard parts at a certain position. Fix the position, and then use an industrial camera to take pictures of the standard parts. The position of the installation holes photographed must be fixed, and the captured image of the qualified product is obtained; when detecting the shelf beam to be tested, it is only necessary to move the beam of the shelf to be tested to the above fixed Position, and then use the fixed position of the industrial camera to take another shot, and compare the captured image of the mounting hole with the image of the qualified product. On the one hand, you can know whether there is a defect in the mounting hole, and on the other hand, you can also pass through the center of the mounting hole. position to determine whether the length of the workpiece to be measured is qualified.

However, since there are usually two installation holes at both ends of the shelf beam, and the distance between the two installation holes is often 4-6 times the diameter of the installation hole, therefore, it is often necessary to use two industrial cameras to take photos of the same end in the actual shooting process. Two mounting holes or use industrial cameras with higher pixels to shoot; if two industrial cameras are used to shoot two mounting holes at the same end of the shelf beam, on the one hand, resources are wasted and equipment costs are increased; on the other hand, two The installation of industrial cameras is more complicated and they are easy to affect each other; if a single industrial camera is used for shooting, due to the large distance between the two mounting holes, the image definition of the captured mounting holes is not high, and the detection accuracy is low. Image processing is more difficult, so it meets the actual production needs.

And because there are installation holes at both ends of the shelf beam, generally two cameras are used at both ends to realize the shooting of the installation holes at both ends, and the image processing process must go through two times to judge whether the shelf beam is qualified. Increased equipment costs.

Utility model content

The purpose of this utility model is to provide a device for judging whether the beam of the shelf is qualified by using a plane mirror group in view of the deficiencies of the above-mentioned prior art. The device uses an industrial camera to automatically detect the mounting hole of the beam of the shelf after the cutting process, and the detection accuracy is high. No manual operation is required, the degree of automation is high, and the equipment cost is low. It can know whether the shelf beam is qualified in time, so as to make feedback adjustments to other pre-processes, 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 beam of the shelf is qualified by using a plane mirror group, including a base, a conveyor belt, a proximity switch, a block, a push cylinder, a measuring bracket, a gantry, an image shooting module, Lead screw drive module, compression cylinder and flip drive module, the conveyor belt is set 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 moves along the conveyor belt The direction is provided with a proximity switch and a stopper in turn. The proximity switch is embedded in the base and is used to detect whether there is a workpiece to be measured on the base. The stopper is fixed above the base and is used to limit the workpiece to be measured; the conveying One side of the 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, and the push cylinder pushes the workpiece on the conveyor belt to the measuring position. on the 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 to be measured along the moving direction of the conveyor belt; the gantry is fixed on the measuring bracket directly above the frame, the left and right ends of the gantry frame are fixed on the base through two brackets; When the module moves, the measuring bracket is driven to rotate along two rotation axes;

The image capturing module includes an industrial camera, a first reflector, a second reflector, a third reflector and a parallel light source, and the first and last ends of the measuring bracket are respectively provided with a first through hole and a second through hole, Two vertically arranged parallel light sources are respectively arranged directly below the first through hole and the second through hole, the first reflector and the second reflector are arranged directly above the first through hole, and the industrial camera is arranged at the second through hole. On the gantry frame directly above the first reflecting mirror and the second reflecting mirror, the third reflecting mirror is arranged directly above the second through hole; the first reflecting mirror, the second reflecting mirror and the third reflecting mirror are all in the shape of 45 Angled installation;

After the parallel light source below the first through hole irradiates parallel light vertically upwards, two beams of parallel beams with the same diameter as the mounting holes are formed after passing through the two mounting holes at the end of the workpiece to be measured, one of which is directly irradiated to the industrial On the camera, another beam of parallel beams is reflected by the first plane mirror and then shines on the industrial camera;

After the parallel light source below the second through hole irradiates parallel light vertically upwards, it passes through the two mounting holes at the head end of the workpiece to form two parallel beams of the same diameter as the mounting holes, and one beam of parallel light passes through the third The reflective mirror and the second reflective mirror irradiate the industrial camera after being reflected, and another parallel light beam is irradiated onto the industrial camera after being reflected by the third reflective mirror, the second reflective mirror and the first reflective mirror in sequence.

Further, it also includes a screw drive module, the screw drive module is fixed on the gantry; the screw drive module includes a positioning motor, a coupling and a ball screw, the positioning motor is fixed on the gantry, and the ball screw The rod is fixed on the gantry 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 third reflection The mirror is fixed on the slider through the mirror mount, and when the positioning motor drives the ball screw to rotate, it drives the third mirror connected to the slider to move linearly along the ball screw.

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 when one rib of the L-shaped rib pushes the cylinder to compress the workpiece to be measured, the Limit, the other rib of the L-shaped rib is used for the limit of the other end of the workpiece to be measured when the compression cylinder compresses the workpiece to be measured.

Further, the slider is provided with a U-shaped groove, and the bottom of the camera mount 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.

The technical concept of the utility model is: the workpiece to be measured will be cut into individual workpieces to be measured by a whole long strip-shaped sheet metal in the pre-cutting process, and after the workpiece to be measured completes the cutting process, the cut The workpiece to be tested will still be pushed forward by the uncut long sheet metal parts, and will enter the feeding port at the front end of the conveyor belt from the outlet of the pre-cutting process, and the workpiece to be tested will be restricted by two limit baffles. The movement direction of the workpiece will not shift, the workpiece to be measured enters the detection device through two limit baffles; the workpiece to be measured will be driven by the conveyor belt to accelerate after entering the conveyor belt, and the movement speed set by the conveyor belt is the pre-cutting process. The speed of the workpiece to be tested at the middle outlet is 1.5-2 times. The workpiece to be tested quickly enters the detection device under the acceleration of the conveyor belt, passes through the proximity switch and reaches the position of the stopper. It is blocked by the stopper and cannot continue to move. The proximity switch Receive the signal that the workpiece to be measured passes, and transmit the signal to the controller, the controller controls the push cylinder to start moving, and the push cylinder pushes the workpiece to be measured from the conveyor belt to the measuring bracket and the L-shaped stop of the measured bracket One of the ribs on the side is blocked, and the cylinder of the compression cylinder moves at this time to compress the workpiece to be measured to the other side of the L-shaped rib of the measuring bracket. When both the compression cylinder and the push cylinder have completed the compression operation , the workpiece to be measured is at the measurement position; the workpiece to be measured is photographed by the image capture system to obtain images of the mounting holes at both ends of the workpiece to be measured; the images of the two sets of image capture systems are image processed, and the two are compared with the standard image , the judgment is based on the position of the center point of the mounting hole in the image, the size of the mounting hole, and whether there are defects on 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 to be tested is the same as the standard length. The workpiece to be tested is a qualified piece; if the position of the center point of the mounting hole is different from the standard image, it means that the length of the workpiece to be measured is different from the standard length, and the workpiece to be tested is an unqualified workpiece to be tested; if the size of the mounting hole is unqualified or If there are defects on the edge of the mounting hole, it means that the mounting hole is unqualified, and the workpiece to be tested is also an unqualified workpiece to be tested.

The judgment principle of the utility model is to take pictures of two pairs of installation holes at both ends of the shelf crossbeam, judge whether the length of the shelf crossbeam is qualified by whether the position of each pair of installation holes is correct, and judge whether there are defects in the installation holes by comparing the photographed pictures with the standard pictures . Since there are two installation holes at both ends of the shelf beam, the size of the two installation holes is less than 10mm, and the distance between the two installation holes is often more than 50mm, it is usually impossible to take pictures of the two installation holes at the same time with an industrial camera. ;Even for the two mounting holes at the same end, if you directly use an industrial camera to capture both mounting holes, you must use a high-resolution industrial camera for shooting, otherwise the photographed installation Too small holes are not conducive to image processing; and using the principle of flat mirrors to reflect parallel light, the light passing through one of the mounting holes can be shifted to be close to the light passing through the other mounting hole, and finally the imaging on the industrial camera is two A closer mounting hole; for the two mounting holes at the other end of the workpiece to be measured, the principle of the periscope can be used, and then reflected by two 45-degree mirrors and then shot to the same industrial camera, the finally received image. Although it is not four circles, the utility model adopts the method of self-study of standard parts to obtain standard images, and the basis for judging whether it is qualified is suitable for comparison with standard images. Even if the images are not four circles of the same size, the final image The processing stage will have no effect.

In the utility model, during the movement of the compression cylinder, the magnetic grid head at the front end of the compression cylinder will move on the magnetic scale. At this time, the length of the workpiece to be measured can be calculated according to the moving distance of the magnetic grid head, and the length can be directly measured. Read out, further detect the length data of the shelf beam, and improve the accuracy of the measurement.

In the utility model, the third reflector is arranged on the lead screw drive module, which is mainly used for adjusting the distance between the third reflector and the industrial camera, so as to adapt to the measurement of workpieces with different lengths.

The beneficial effects of the utility model are:

1. The utility model has the advantages of 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.

2. The utility model uses an industrial camera for image acquisition to detect the installation hole, and judges whether the beam of the shelf to be tested is qualified through the position of the center point of the installation hole on the image, and through the installation of the two ends of the beam of the shelf to be tested The hole shooting image is compared with the standard image 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 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.

5. The utility model uses the principle of plane mirror reflection to bring the images of two far away installation holes close together. The size of the installation hole actually photographed by the industrial camera is many times larger than that without the reflection of the plane mirror. Therefore, the industrial camera with lower pixels is adopted. The camera can also take images with higher definition, which reduces the cost of equipment and improves the speed and accuracy of image processing.

6. The utility model uses the principle of a periscope to image two pairs of mounting holes that are far away in the same industrial camera, which reduces the total cost of the equipment on the one hand, and on the other hand only needs to process one image to judge whether the shelf beam is qualified , which improves the detection efficiency.

7. The utility model sets a magnetic grating head on the compression cylinder, and uses the movement distance of the compression cylinder to indirectly calculate the length of the workpiece to be measured, further enhancing the measurement effect and improving the accuracy of detection.

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 beam of a shelf is qualified by using a plane mirror group in the present invention.

Fig. 2 is a front view of a device for judging whether a beam of a shelf is qualified by using a plane mirror group of the present invention.

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

Fig. 4 is a plan view of a device for judging whether a beam of a shelf is qualified by using a plane mirror group of the present invention.

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

Fig. 6 is a schematic diagram of the optical path of the present invention.

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

Fig. 8 is a schematic structural view of the slider of the present invention.

Fig. 9 is a schematic diagram of the mechanism of the flip driving module of the present invention.

Fig. 10 is a schematic diagram of a standard image captured by the industrial camera of the present invention.

In the figure, 1-base, 2-workpiece to be measured, 3-conveyor belt, 4-push cylinder, 5-measurement bracket, 6-industrial camera, 7-third mirror, 8-pressing cylinder, 9-approach Switch, 10-block, 11-gantry, 12-positioning motor, 13-ball screw, 14-coupling, 15-limit baffle, 16-L-shaped rib, 17-bracket, 18-bearing Seat, 19-slider, 20-first pusher plate, 21-second pusher plate, 22-slope surface, 23-strip slide rail, 24-second through hole, 25-magnetic grating head, 26- Magnetic scale, 27-first support, 28-second support, 29-overturn cylinder, 30-parallel light source, 31-first reflector, 32-second reflector, 33-first through hole.

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 the beam of a shelf is qualified by using a plane mirror group of the utility model includes a base 1, a conveyor belt 3, a proximity switch 9, a stopper 10, a push cylinder 4, a measuring bracket 5, Gantry 11, image capture module, lead screw drive module, compression cylinder 8 and overturn drive module, the conveyor belt 3 is arranged on the base 1, and the feed port of the conveyor belt 3 is connected to the discharge of the pre-cutting process 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 there is a workpiece 2 to be measured on the base 1. The stopper 10 is fixed above the base 1 and is used to limit the position of the workpiece 2 to be measured; 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 support frame 5, the proximity switch 9 is triggered to control the movement of the push cylinder 4, and the push cylinder 4 pushes the workpiece 2 on the conveyor belt 3 to the measuring bracket 5; the pressing cylinder 8 is arranged on the measuring bracket 5 And close to the feeding port of the conveyor belt 3, the pressing cylinder 8 is used to compress the workpiece 2 to be measured along the moving direction of the conveyor belt 3; The two ends are fixed on the base 1 through two brackets 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 respectively connected to the base 1 and the measuring bracket 5, and the turning driving module moves The measuring bracket 5 is driven to rotate along two rotation axes; the image capturing module includes an industrial camera 6, a first reflector 31, a second reflector 32, a third reflector 7 and a parallel light source 30, and the measurement The first and last ends of the bracket 5 are respectively provided with a first through hole 33 and a second through hole 24, and two vertically arranged parallel light sources 30 are respectively arranged directly below the first through hole 33 and the second through hole 24, The first reflecting mirror 31 and the second reflecting mirror 32 are arranged directly above the first through hole 33, and the industrial camera 6 is arranged on the gantry 11 directly above the first reflecting mirror 31 and the second reflecting mirror 32. The third reflector 7 is arranged directly above the second through hole 24; the first reflector 31, the second reflector 32 and the third reflector 7 are installed at an inclination of 45 degrees; below the first through hole 33 After the parallel light source 30 irradiates parallel light vertically upwards, two parallel beams with the same diameter as the installation holes are formed after passing through the two mounting holes at the end of the workpiece 2 to be measured, one of which is directly irradiated on the industrial camera 6, and the other A bundle of parallel light beams is reflected by the first plane mirror and irradiates on the industrial camera 6; after the parallel light source 30 below the second through hole 24 irradiates parallel light rays vertically upwards, it passes through two mounting holes at the head end of the workpiece 2 to form a Two beams of parallel light beams consistent with the diameter of the installation hole, one beam of parallel light beams are reflected by the third mirror 7 and the second mirror 32 in turn and then irradiated on the industrial camera 6, and the other parallel beams of light pass through the third mirror 7, The second reflector 32 and the first reflector 31 reflect and illuminate the industrial camera 6 .

The device also includes a screw drive module, the screw drive module is fixed on the gantry 11; the screw drive module includes a positioning motor 12, a coupling 14 and a ball screw 13, and the positioning motor 12 is fixed on the gantry 11, the ball screw 13 is fixed on the gantry 11 through two bearing housings 18, 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, and the ball A slider 19 is sleeved on the lead screw 13, and the third reflector 7 is fixed on the slider 19 through a mirror mount, and the positioning motor 12 drives the third mirror connected to the slider 19 when the ball screw 13 rotates. The mirror 7 moves linearly along the ball screw 13 .

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 .

A slope surface 22 is provided on the side of the measuring bracket 5 close to the conveyor belt 3 .

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 .

The measuring bracket 5 is provided with an L-shaped rib 16, the two ribs of the L-shaped rib 16 are perpendicular to each other, and one rib of the L-shaped rib 16 pushes the cylinder 4 to compress the workpiece 2 to be measured. 2. The limit at the other end, the other side of the L-shaped rib 16 is used to limit the position at the other end of the workpiece 2 to be measured when the compression cylinder 8 compresses the workpiece 2 to be measured.

The slider 19 is provided with a U-shaped groove, and the bottom of the camera mount is provided with a bar-shaped slider 19 , and the slider 19 is sleeved on the bar-shaped slide rail 23 through the U-shaped groove.

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.

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 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 (9)

1. one kind utilizes plane mirror group to judge the device that guard frame rail is the most qualified, it is characterised in that: include base (1), conveying Band (3), proximity switch (9), block (10), propelling movement cylinder (4), measurement bracket (5), portal frame (11), image taking module, silk Thick stick drives module, compression cylinder (8) and upset to drive module, and described conveyer belt (3) is arranged on base (1), described conveyer belt (3) charging aperture connects the discharging opening of preposition cut-out operation, and the end of described conveyer belt (3) depends on along conveyer belt (3) direction of motion Secondary being positioned proximate to switchs (9) and block (10), and described proximity switch (9) is embedded in base (1) and above and is used for detecting base (1) Workpiece for measurement (2) process, described block (10) whether is had to be fixed on base (1) top and for workpiece for measurement (2) is limited Position；The side of described conveyer belt (3) is provided perpendicular to the propelling movement cylinder (4) that conveyer belt (3) carriage direction is arranged, and opposite side sets Being equipped with measurement bracket (5), described proximity switch (9) controls after triggering to push cylinder (4) motion, pushes cylinder (4) by conveyer belt (3) workpiece for measurement (2) on is pushed to measure on bracket (5)；Described compression cylinder (8) is arranged on measurement bracket (5) and above and leans on The charging aperture of nearly conveyer belt (3), described compression cylinder (8) is for compressing workpiece for measurement (2) along conveyer belt (3) direction of motion；Institute Stating portal frame (11) and be fixed on directly over measurement bracket (5), the two ends, left and right of portal frame (11) are fixed by two supports (17) On base (1)；The two ends of described measurement bracket (5) connect base (1) by two rotary shafts, and described upset drives module to divide Not connecting base (1) and measure bracket (5), upset drives described measurement bracket (5) along two rotary shafts when driving block motion Rotate；

Described image taking module includes industrial camera (6), the first reflecting mirror (31), the second reflecting mirror (32), the 3rd reflecting mirror (7) and source of parallel light (30), the head and end of described measurement bracket (5) is respectively equipped with the first through hole (33) and the second through hole (24), two sources of parallel light being vertically arranged (30) are separately positioned on the first through hole (33) and the underface of the second through hole (24), Described first reflecting mirror (31) and the second reflecting mirror (32) are arranged on the surface of the first through hole (33), and industrial camera (6) is arranged On portal frame (11) directly over the first reflecting mirror (31) and the second reflecting mirror (32), described 3rd reflecting mirror (7) is arranged on The surface of the second through hole (24)；Described first reflecting mirror (31), the second reflecting mirror (32) and the 3rd reflecting mirror (7) are all in 45 degree Tilt to install；

After the source of parallel light (30) of described first through hole (33) lower section irradiates parallel rays straight up, through workpiece for measurement (2) forming the collimated light beam that two bundles are consistent with installing hole diameter after two installing holes of end, the most a branch of collimated light beam directly shines Being mapped on industrial camera (6), another bundle collimated light beam is irradiated on industrial camera (6) after the first plane mirror reflection；

After the source of parallel light (30) of described second through hole (24) lower section irradiates parallel rays straight up, through workpiece for measurement (2) two installing holes of head end form the collimated light beam that two bundles are consistent with installing hole diameter, and the most a branch of directional light sequentially passes through It is irradiated on industrial camera (6) after 3rd reflecting mirror (7) and the second reflecting mirror (32) reflection, an other collimated light beam warp successively It is irradiated on industrial camera (6) after crossing the 3rd reflecting mirror (7), the second reflecting mirror (32) and the first reflecting mirror (31) reflection.

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: also including that leading screw drives module, described leading screw drives module to be fixed on portal frame (11)；Described leading screw drives module to include Positioning motor (12), shaft coupling (14) and ball-screw (13), positioning motor (12) is fixed on portal frame (11), ball wire Thick stick (13) is fixed on portal frame (11) by two bearing blocks (18), and described ball-screw (13) is parallel with conveyer belt (3) to be set Putting, positioning motor (12) connects ball-screw (13) by shaft coupling (14), and described ball-screw is set with slide block on (13) (19), described 3rd reflecting mirror (7) is fixed on slide block (19) by reflecting mirror mounting seat, and described positioning motor (12) drives rolling The 3rd reflecting mirror (7) being connected with slide block (19) is driven to move along a straight line along described ball-screw (13) when ballscrew (13) rotates.

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: described propelling movement cylinder (4) is arranged on the middle part of conveyer belt (3), and the front end pushing cylinder (4) is provided with the first scraping wings (20)。

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: described measurement bracket (5) is provided with slope (22) near the side of conveyer belt (3).

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists Be provided with two pieces of postive stop baffles (15) in: the two ends of the charging aperture of described conveyer belt (3), two pieces of postive stop baffles (15) are parallel to be set Put, and the spacing between two pieces of postive stop baffles (15) is equal to the width of conveyer belt (3).

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: being provided with L-type rib (16) on described measurement bracket (5), two ribs of L-type rib (16) are mutually perpendicular to, L-type rib (16) when a rib pushes cylinder (4) compression workpiece for measurement (2), workpiece for measurement (2) other end is spacing, L-type rib (16) Another rib for compression cylinder (8) compress workpiece for measurement (2) time workpiece for measurement (2) other end spacing.

The most according to claim 2 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: described slide block (19) is provided with U-shaped groove, is provided with stripe shape slide block (19) bottom camera mounting seat, and described slide block (19) passes through U Type groove is sleeved on bar shaped slide rail (23).

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: described measurement bracket (5) is provided with magnetic railings ruler (26), and the piston rod end of described compression cylinder (8) connects the second scraping wings (21), the second scraping wings (21) is provided with the magnetic grid head (25) matched with described magnetic railings ruler (26).

The most according to claim 1 a kind of utilizing plane mirror group to judge the device that guard frame rail is the most qualified, its feature exists In: described upset drives module to include the first bearing (27), the second bearing (28) and upset cylinder (29), and the first bearing (27) is solid Being scheduled on base (1), the second bearing (28) is fixed in measurement bracket (5), the two ends of upset cylinder (29) respectively with first Seat (27) and the second bearing (28) are hinged.