CN112782184A

CN112782184A - Part detection device based on machine vision

Info

Publication number: CN112782184A
Application number: CN202110011750.9A
Authority: CN
Inventors: 周建锋; 王福旭; 应伟伦; 陈玎羿
Original assignee: Ningbo Xingfan Information Technology Co ltd
Current assignee: Ningbo Xingfan Information Technology Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-05-11

Abstract

The embodiment of the disclosure discloses a part detection device based on machine vision, the device includes: the device comprises a first panel, a detection platform, a backlight source and at least one camera; the detection platform is horizontally arranged, and the backlight source and the at least one camera are respectively arranged on two sides of the detection platform; first panel has the inclined plane, and the bottom on inclined plane supports and leans on testing platform, and with testing platform's relative height can adjust. This technical scheme utilizes the inclined plane of first panel, for waiting to detect the part and move on testing platform and provide initial speed to at least one camera can gather a plurality of image photos that wait to detect the part motion process under the cooperation of backlight, and then can confirm through image analysis whether qualified the part, because can be in a testing process to many photos are shot to different detection projects, thereby greatly improved detection efficiency.

Description

Part detection device based on machine vision

Technical Field

The utility model relates to a machine vision detects technical field, concretely relates to part detection device based on machine vision.

Background

The processing of the parts which can roll, such as pins, balls and step shafts, generally needs more than ten working procedures, and defects often occur in the processing process, which seriously affect the quality of the parts and need to be controlled. Therefore, before assembly, the parts need to be inspected to avoid the final serious damage to the equipment.

When the existing machine vision detection equipment detects parts, a workpiece needs to be placed on a detection platform for detection. When using a plurality of cameras to shoot the work piece, because testing platform's bearing will cause and bear the weight of the contact surface and can't shoot the photo, need to remove shooting again behind the part position. Sometimes, in order to complete a plurality of detection items, such as size and contour of a part, surface defects, etc., the detection on the detection platform is required for many times, which greatly reduces the efficiency and is not beneficial to the application in industrial detection.

Disclosure of Invention

In order to solve the problems in the related art, embodiments of the present disclosure provide a part detection apparatus based on machine vision.

Specifically, the machine vision-based part detection device comprises: the device comprises a first panel, a detection platform, a backlight source and at least one camera;

the detection platform is horizontally arranged, and the backlight source and the at least one camera are respectively arranged on two sides of the detection platform; the first panel is provided with an inclined surface, the bottom of the inclined surface abuts against the detection platform, and the relative height of the first panel and the detection platform can be adjusted;

when the part to be detected rolls on the inclined surface to the detection platform, the part to be detected rolls on the detection platform at a first speed, and in the rolling process, at least one camera collects the surface image of the part to be detected under the cooperation of the backlight source.

Optionally, the apparatus further comprises: a transfer assembly;

the transfer assembly includes: the conveying belt and the guide groove are positioned above the conveying belt; under the drive of the conveyor belt, the part to be detected is guided to the first panel through the guide groove.

Optionally, a groove is formed in the first panel, and the groove is arranged along the guiding direction of the guiding groove and used for positioning the part to be detected.

Optionally, the apparatus further comprises: and the driving component is provided with a driving part positioned above the groove and used for moving the part to be detected out of the groove.

Optionally, the driver comprises: the distance between the first driving piece and the second driving piece can be adjusted, and the first driving piece and the second driving piece are matched with the size of the part to be detected.

Optionally, the apparatus further comprises: a controller; the conveying assembly is provided with a positioning device for positioning the part to be detected to move to the groove and sending a moving-out instruction to the controller; and the controller controls the driving piece to move the part to be detected out of the groove according to the received moving-out instruction.

Optionally, the detection platform comprises: the transparent glass, the second panel and a fixing piece for fixing the transparent glass and the second panel;

the second panel is provided with an inclined plane, the top of the inclined plane is abutted against the transparent glass, and the part to be detected leaves the detection platform after rolling on the inclined plane.

Optionally, a photoelectric sensor is arranged on the fixing piece and used for sensing that the part to be detected enters the detection platform and sending a photographing instruction to the controller, and the controller controls at least one camera to photograph according to the received photographing instruction; and/or

The fixing piece is provided with a photoelectric sensor used for sensing that the part to be detected leaves the detection platform and sending a moving-out instruction to the controller, and the controller controls the driving piece to move the next part to be detected out of the groove according to the received moving-out instruction.

Optionally, the apparatus further comprises: and the platform wiping component is positioned above the detection platform and can move along the direction vertical to the rolling direction of the part to be detected so as to wipe the detection platform.

Optionally, the apparatus further comprises: and the sorting assembly is positioned on one side of the detection platform and used for sorting the parts to be detected.

Optionally, the backlight source is a surface light source or a parallel light source; and at least one camera collects the surface image of the part to be detected under the coordination of the backlight source.

Optionally, at least two of the cameras are provided with a second light source, and the second light source is arranged along the side surface of the part to be detected in the rolling direction; and at least two cameras are used for acquiring the surface image of the part to be detected under the coordination of the second light source.

Optionally, a second light source is arranged on at least one of the cameras, and the backlight source is a surface light source or a parallel light source;

and at least one camera collects the surface image of the part to be detected under the matching of the backlight source and the second light source.

Optionally, a second light source is arranged on at least one of the cameras, and the cameras are arranged along the side surface of the part to be detected in the rolling direction;

and at least one camera is matched with the second light source to collect the surface image of the part to be detected.

Optionally, the apparatus further comprises: the positive surface light source is arranged on one side of at least one camera; the front surface light source is a surface light source and is arranged along the side surface of the part to be detected in the rolling direction;

and at least one camera collects the surface image of the part to be detected under the matching of the surface light source.

Optionally, a slit is arranged in front of the surface light source and used for generating parallel light to irradiate on the part to be detected for imaging.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the part detection device based on machine vision that this disclosed embodiment provided includes: the device comprises a first panel, a detection platform, a backlight source and at least one camera; the detection platform is horizontally arranged, and the backlight source and the at least one camera are respectively arranged on two sides of the detection platform; the first panel is provided with an inclined plane, the bottom of the inclined plane is abutted against the detection platform, and the relative height of the first panel and the detection platform can be adjusted; the part to be detected rolls to the detection platform from the inclined surface and then rolls on the detection platform at a first speed, and in the rolling process, at least one camera collects surface images of the part to be detected under the cooperation of the backlight source. This technical scheme utilizes the inclined plane of first panel, for waiting to detect the part and move on testing platform and provide initial speed to at least one camera can gather a plurality of image photos that wait to detect the part motion process under the cooperation of backlight, and then can confirm through image analysis whether qualified the part, because can be in a testing process to many photos are shot to different detection projects, thereby greatly improved detection efficiency.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 illustrates a front view of a machine vision based part inspection device according to an embodiment of the present disclosure;

FIG. 2 illustrates an exploded view of the machine vision based part inspection apparatus shown in FIG. 1;

FIG. 3 illustrates a close-up view of a drive assembly according to an embodiment of the present disclosure;

FIG. 4 shows a schematic structural diagram of an inspection platform according to an embodiment of the present disclosure;

FIG. 5 shows a schematic view of dimensional inspection of a part to be inspected according to an embodiment of the present disclosure;

FIG. 6 shows a schematic view of end face inspection of a part to be inspected according to an embodiment of the present disclosure;

FIG. 7 shows a schematic view of end face inspection of a part to be inspected according to an embodiment of the present disclosure;

FIG. 8 shows a schematic view of detection of a cylindrical surface of a part to be detected according to an embodiment of the disclosure;

FIG. 9 is a schematic diagram illustrating a dimension detection result of a part to be detected according to an embodiment of the disclosure;

fig. 10 shows a schematic diagram of an end face detection result of a part to be detected according to an embodiment of the disclosure.

Detailed Description

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.

In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of the disclosed features, numbers, steps, behaviors, components, parts, or combinations thereof, and are not intended to preclude the possibility that one or more other features, numbers, steps, behaviors, components, parts, or combinations thereof may be present or added.

It should be further noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present disclosure is made to solve, at least in part, the problems in the prior art that the inventors have discovered.

As shown in fig. 1 to 4, the machine vision-based part inspection apparatus includes: a first panel 10, an inspection platform 20, a backlight 30, and at least one camera 40;

the detection platform 20 is horizontally arranged, and the backlight source 30 and the at least one camera 40 are respectively arranged on two sides of the detection platform 20; the first panel 10 is provided with an inclined surface 11, the bottom of the inclined surface 11 abuts against the detection platform 20, and the relative height of the first panel and the detection platform 20 can be adjusted;

after rolling from the inclined plane 11 to the inspection platform 20, the part d to be inspected rolls on the inspection platform 20 at a first speed, and in the rolling process, at least one camera 40 collects a surface image of the part to be inspected under the cooperation of the backlight 30.

The part detection device based on machine vision provided by the embodiment of the disclosure utilizes the inclined plane of the first panel to provide initial speed for the movement of the part to be detected on the detection platform, so that at least one camera can collect a plurality of image photos of the movement process of the part to be detected under the cooperation of the backlight source, and then whether the part is qualified can be determined through image analysis.

According to the embodiments of the present disclosure, the part to be detected is generally a rolling shaft, such as a pin, a ball, a step shaft, a cylindrical roller, a needle roller, etc., which is not limited by the present disclosure.

According to the embodiment of the present disclosure, the first panel 10 has the inclined surface 11, the bottom of the inclined surface 11 abuts against the detection platform 20, and the relative height between the inclined surface 11 and the detection platform 20 can be adjusted, for example, the height is at least flush with the detection platform 20 or slightly higher than the detection platform 20, so as to prevent the part to be detected from being clamped between the two, and enable the part to be detected to smoothly roll on the detection platform 20 at the first speed.

According to the embodiment of the present disclosure, the detection platform 20 is made of non-abrasion high-transmittance colorless optical glass, so that light emitted from the bottom backlight 30 can sufficiently penetrate through the platform to irradiate the part to be detected. The detection platform 20 is relatively parallel to the horizontal ground, and has a moderate thickness and a uniform density, and the distance from the detection platform to the backlight 30 is moderate. The size profile of the inspection platform 20 is determined according to the inspection requirements. Taking the rolling axis as an example, the length of the platform needs to be greater than the circumference of the axis, and the width of the platform needs to be greater than the length of the axis. Of course, if the roundness of the shaft and the defect are to be detected at the same time, the length of the stage needs to be increased moderately.

According to embodiments of the present disclosure, the backlight 30 may be selected from a surface light source, which is located directly below the detection platform 20, typically over a distance of 10cm from the detection platform 20, so as to illuminate the entire surface of the detection platform 20. The backlight 30 and the camera 40 cooperate to perform the dimension profile detection of the part to be detected.

According to the embodiment of the present disclosure, the camera 40 uses a high-resolution industrial camera to shoot the exposure of the part, which is located right above the inspection platform 20, and the viewing range of the camera lens can cover the whole inspection platform 20. The camera 40 and the backlight 30 are matched to perform size contour and surface defect detection on the part to be detected, and when the surface defect detection is performed on the part to be detected, the backlight 30 needs to be turned off, and a specific method is described below.

Since the part to be inspected rolls on the inspection platform 20 in a low-speed motion manner, the exposure time of the camera 40 is as short as possible to reduce the influence caused by motion blur. In order to save cost, a plurality of low-precision cameras 40 may be arranged in the moving direction of the part to be detected, the plurality of cameras 40 are arranged in a line, and pictures are taken during the moving process of the part to be detected respectively, or the viewing area of each camera 40 is controlled, so that each camera 40 is only responsible for taking pictures in the viewing area, which is not limited by the disclosure.

According to an embodiment of the present disclosure, the apparatus further comprises: a transfer assembly 50; the transfer assembly 50 includes: a conveyor belt 51 and a guide groove 52 located above the conveyor belt 51; under the driving of the conveyor belt 51, the part to be detected is guided to the first panel 10 through the guide groove 52. Specifically, the first panel 10 further has a horizontal surface, on which a groove 12 is disposed, which is disposed along the guiding direction of the guiding groove 52, and is used for positioning the part to be detected.

Before detecting, can with a plurality of treat that detect the part and carry to first panel 10 on through conveyer belt 51, for the rolling shaft, utilize guiding groove 52 can avoid it to take place to roll in data send process, and in order to further fix a position the rolling shaft, can lead the rolling shaft to recess 12 in through guiding groove 52, recess 12 also plays the effect that prevents the rolling shaft and move wantonly, treat that preceding rolling shaft accomplishes image acquisition back, again with the rolling shaft in the present recess 12 shift out recess 12 and carry out image acquisition.

In the present disclosure, the first panel 10 further has a fixing surface, which is disposed perpendicular to the horizontal plane, for fixing the first panel 10 to the transfer assembly 50. The first panel 10 and the inspection platform 20 may be separate devices, and the bottom of the inclined surface 11 of the first panel 10 abuts against the inspection platform 20 after the conveying assembly 50 is fixed.

It should be noted that the inclination angle of the inclined plane 11 can be adjusted to obtain different first speed values, in one embodiment, the inclined plane 11 is hinged to the horizontal plane, and the relative distance between the first panel 10 and the detection platform 20 is adjusted by adjusting the angle between the inclined plane 11 and the horizontal plane, so that the first panel 10 abuts against the detection platform 20; in one embodiment, the first panel 10 is tilted at a proper angle according to the size of the part to be inspected, and then the corresponding first panel 10 is replaced and mounted on the conveying assembly 50, so as to ensure that the part to be inspected rolls far enough away from the inspection platform 20 without affecting the inspection of the next part to be inspected. The above embodiments are merely illustrative, and the present disclosure is not limited thereto.

According to an embodiment of the present disclosure, the apparatus further comprises: a drive assembly 60 having a drive member 61 located above the recess 12 for moving the part to be inspected out of the recess 12. In the manner of this disclosure, the drive assembly 60 may be a device with a pneumatic cylinder, upon which the drive member 61 moves the part to be inspected out of the groove 12 at a speed v₀Dropping, neglecting the friction, the speed v at which the part to be inspected moves onto inspection platform 20 is expressed as:

wherein h is the height difference of the inclined plane, and g is the gravity acceleration. By adjusting the height difference h, the speed v can be adjusted.

According to an embodiment of the present disclosure, the driver 61 includes: the distance between the first driving piece and the second driving piece can be adjusted, and the first driving piece and the second driving piece are matched with the size of the part to be detected. Use the roll axle as an example, to the roll axle of different size profiles, in order to make driving piece 61 can not harm the middle part of roll axle when shifting out the roll axle, can adjust the distance between first driving piece and the second driving piece and align with the both ends of roll axle, exert the driving force from both ends like this, can be under the prerequisite that does not harm the roll axle, guarantee that the roll axle atress is even, thereby when passing through testing platform 20, can expose the roll surface under camera 40's field of vision scope better, be favorable to image acquisition and data analysis.

According to an embodiment of the present disclosure, the apparatus further comprises a controller; the conveying assembly 50 is provided with a positioning device 53, and the positioning device is used for positioning the part to be detected to move to the groove 12 and sending a moving-out instruction to the controller; the controller controls the driving member 61 to move the part to be detected out of the groove 12 according to the received moving-out instruction.

According to an embodiment of the present disclosure, the detection platform 20 includes: a transparent glass 21, a second panel 22, and a fixing member 23 for fixing the transparent glass 21 and the second panel 22; the second panel 22 has an inclined surface, the top of the inclined surface abuts against the transparent glass 21, and the part to be detected leaves the detection platform 20 after rolling on the inclined surface.

In the present disclosure, one end of the transparent glass 21 abuts against the first panel 10, the other end abuts against the second panel 22, the part to be detected rolls from the inclined surface of the first panel 10 to the transparent glass 21 and then continues to roll at the first speed, and then the at least one camera 40 collects the surface image of the part to be detected in cooperation with the backlight 30. After the part to be detected moves on the transparent glass 21 for a distance, the speed is reduced, when the part to be detected moves onto the second panel 22, the part to be detected can continue to move after leaving the detection platform 20 through the inclined surface of the second panel 22, and the part to be detected does not stop, so that the collision with the next part to be detected is avoided.

According to the embodiment of the disclosure, the fixing member 23 is provided with a photoelectric sensor 231, the position of the photoelectric sensor 231 is located at the head of the transparent glass 21 and/or the tail of the second panel 22, the photoelectric sensor arranged at the head of the transparent glass 21 is used for sensing that the part to be detected enters the detection platform 20 and sending a photographing instruction to the controller, and the controller controls at least one camera 40 to photograph according to the received photographing instruction; the photoelectric sensor arranged at the tail of the second panel 22 is used for sensing that the part to be detected leaves the detection platform 20, and sending a moving-out instruction to the controller, and the controller controls the driving member 61 to move the next part to be detected out of the groove 121 according to the received moving-out instruction.

According to an embodiment of the present disclosure, the apparatus further comprises: and the platform wiping component 70 is positioned above the detection platform 20 and can move along the direction perpendicular to the rolling direction of the part to be detected so as to wipe the detection platform 20.

In the present disclosure, after the parts to be detected are processed in, for example, rust prevention, polishing or cleaning stages, the surfaces of the parts to be detected may have impurities such as dust, stains, and oil stains, and the detection platform 20 may have the impurities attached thereto after detecting a plurality of parts to be detected, on one hand, the impurities may affect the imaging effect under the irradiation of the backlight source, and may be easily misjudged as an unqualified product during image analysis; on the other hand, the movement of the part to be detected may be stopped, so that the detection cannot be completed. To avoid this, the platform wiper assembly 70 may be used to remove contaminants to ensure proper performance of the test. Specifically, the wiping cycle of the platform wiping component 70 may be set to wipe periodically, and the impurities may be removed in time by manual control, which is not limited by the present disclosure.

In the present disclosure, the platform wiper assembly 70 may move in a mode that starts from one end of the testing platform 20 and horizontally passes through the testing platform, and then returns to the original position at the other end, and the device is kept in a stable state during the wiping process. In some cases, the platform wiper assembly 20 also needs to be able to lift and fall to avoid obscuring the camera 40.

According to an embodiment of the present disclosure, the apparatus further comprises: and the sorting assembly 80 is positioned on one side of the detection platform 20 and is used for sorting the parts to be detected. The sorting assembly 80 can switch sorting ports according to the image analysis result of the parts to be detected, and recycle and sort the qualified and unqualified parts to be detected through different sorting ports.

Specifically, the sorting assembly 80 includes a flap 81, a conforming article collection bin 82, and a non-conforming article discharge guide 83. When the part to be detected rolls from the second panel 22 to the turning plate 81, if the part to be detected is defect-free through image analysis, the qualified product is sent to the qualified product collecting box 82, and if the part to be detected is unqualified through image analysis, the turning plate 81 is rotated to send the unqualified product to the unqualified product discharging guide rail 83, and then waste treatment is carried out.

The dimensions of the part to be inspected and the manner of detecting surface defects are described in detail below:

1. the size detection mode of the part to be detected is as follows:

referring to fig. 5, the backlight 30 is a surface light source or a parallel light source; at least one camera 40 collects the surface image of the part d to be detected under the cooperation of the backlight source 30, and analyzes the size profile of the part to be detected.

Specifically, the light is emitted through a backlight 30 (a surface light source or a parallel light source), and the picture is taken by using the phase 40, so as to form a picture (as shown in fig. 9) that the background is bright and the part to be detected is dark, and the picture is used for detecting the length, the diameter, the chamfering length, the chamfering angle and the like of the part to be detected. In the process of rolling the shaft, parameters such as length, diameter, chamfer angle and the like can be measured for multiple times, the precision of each parameter is quantitatively evaluated according to the mean value and variance of the measured values, and high-quality measurement is carried out on the product. The relationship between the number of times N of measurement, the photographing interval T, and the axis scrolling speed V is T ═ pi d/(N V), and the exposure time T needs to be shorter than the photographing interval T, i.e., T < T.

2. The end face and end face defect detection method of the part to be detected comprises the following steps:

referring to fig. 6, at least two cameras 40 are provided with second light sources 41, which are disposed on one side of at least one of the cameras 40 and are disposed along the side surface of the rolling direction of the part d to be detected, and the second light sources are generally disposed around the lens of the camera 40, for example, are annular light sources, and can be used for detecting defects such as pits, unfilled corners, and the like on the end surface of the shaft; at least two cameras 40 collect surface images of the part d to be detected under the cooperation of the second light source, and analyze end face dimensions (such as end face roundness and circle diameter) and end face defects of the part to be detected (as shown in fig. 10).

Referring to FIG. 7, a top side light source 42 may also be used when performing end surface defect detection. Specifically, the included angle between the incident direction of the top surface light source 42 and the end surface is controlled to be 1 to 10 degrees, and the end surface is irradiated from the side.

3. The detection mode of the size and the surface defect of the part to be detected comprises the following steps:

referring to fig. 5, a second light source 41 is disposed on at least one camera 40, and the backlight source 30 is a surface light source or a parallel light source; at least one camera 40 collects the surface image of the part d to be detected under the cooperation of the backlight source 30 and the second light source, and analyzes the size profile and the surface defect of the part to be detected.

Specifically, the light is emitted through a backlight source 30 (a surface light source or a parallel light source), and a picture with a bright background and a dark background of the part to be detected is formed by taking a picture of the phase 40, and the picture is used for detecting the length, the diameter, the chamfering length, the chamfering angle and the like of the part to be detected; and (3) turning off the backlight source 30, and polishing by a second light source to form a picture with a dark background and a bright color of the part to be detected, so as to detect the surface defects of the part to be detected.

The same part to be detected moves on the detection platform once, the backlight source 30 and the second light source are turned off or on to match the exposure of the camera 40, so that the size profile and the pictures required by surface defect analysis of the part to be detected can be obtained simultaneously without multiple detections.

When analyzing the surface defects of the part to be detected, multiple exposures are needed to take a plurality of surface pictures of the part to be detected when rolling, for example, taking a rolling shaft with the diameter of 6mm as an example, 3-6 pictures are needed to be obtained so as to completely cover the surface of the part to be detected, and usually, a plurality of pictures are also needed to be taken so as to improve the detection precision. If one of the plurality of photographs is determined to be defective, the photograph is determined to be defective, and only if all of the photographs are defective, the photograph is determined to be defective.

It should be noted that, only one of the dimension profile or the surface defect of the part to be detected may be detected according to the requirement, and a corresponding exposure mode may be specifically adopted, which is not described herein again.

4. The detection mode of the defects of the cylindrical surface of the part to be detected is as follows:

referring to fig. 8, the apparatus further includes: a front surface light source 43; the front surface light source 43 is a surface light source and is arranged along the side surface of the rolling direction of the part d to be detected

And at least one camera 40 collects the surface image of the part d to be detected under the cooperation of the surface light source, and analyzes the cylindrical surface defect of the part to be detected.

In the mode of the present disclosure, a slit 44 is disposed in front of the surface light source, and is used for generating parallel light to irradiate the part to be detected for imaging. When detecting defects on the cylindrical surface of the shaft, the camera is positioned above the shaft, and the slit-shaped parallel light source irradiates the cylindrical surface at a small angle from the horizontal direction.

Specifically, the cylindrical surface defect of the part to be detected is detected by a camera 40 through polishing by a front surface light source or a side surface parallel slit light source. If the detection requires that the included angle between the incident light and the surface is smaller than theta (unit degree), the number N of the complete cylindrical surface defect detection pictures required to be shot meets N>360/theta. For example, if θ is 10, at least 36 photographs should be taken. Meanwhile, the height h of the slit parallel light to the cylindrical surface irradiation area_P<r (1-cos theta), wherein r is the radius of the part to be detected.

The part detection device based on machine vision provided by the embodiment of the disclosure has at least the following advantages and effects:

(1) and detecting in all directions without dead angles. The rolling characteristic of the shaft parts is fully utilized, the surfaces of the parts at all angles are sequentially exposed under a camera for shooting, and the parts are almost inspected in all directions without dead angles.

(2) Camera resources are saved. Due to the adoption of a rolling detection mode, the size, the outline and the surface defect detection can be carried out on the shaft parts by singly using one camera through multiple exposures, so that the camera resources are fully saved, and the cost is reduced. If the end face needs to be detected, two end face cameras need to be additionally arranged.

(3) The detection efficiency is high. The real-time detection is carried out during the rolling travel of the shaft, and the detection speed of the real-time detection is mainly determined by the detection speed of the vision equipment. Currently, 5 tests can be performed per second, one axis at a time, and about 14.4 ten thousand axes can be detected in 8 hours, which is much faster than a robot device.

(4) The device is simple and universal. Mechanical device sets up more portably easily, and manufacturing cost is lower, and the operation is more stable, because simple and convenient commonality is strong, a equipment detectable multiple product specification, its diameter and length are not of uniform size, can also detect other types can rolling spare part, for example ball, step axle etc..

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.

Claims

1. A machine vision-based part inspection device, comprising: the device comprises a first panel, a detection platform, a backlight source and at least one camera;

2. The apparatus of claim 1, further comprising: a transfer assembly;

3. The device according to claim 2, wherein the first panel is provided with a groove along the guiding direction of the guiding groove for positioning the part to be detected.

4. The apparatus of claim 3, further comprising: and the driving component is provided with a driving part positioned above the groove and used for moving the part to be detected out of the groove.

5. The device of claim 4, wherein the drive member comprises: the distance between the first driving piece and the second driving piece can be adjusted, and the first driving piece and the second driving piece are matched with the size of the part to be detected.

6. The apparatus of claim 4 or 5, further comprising: a controller; the conveying assembly is provided with a positioning device for positioning the part to be detected to move to the groove and sending a moving-out instruction to the controller; and the controller controls the driving piece to move the part to be detected out of the groove according to the received moving-out instruction.

7. The apparatus of claim 1, wherein the detection platform comprises: the transparent glass, the second panel and a fixing piece for fixing the transparent glass and the second panel;

the second panel is provided with an inclined plane, the top of the inclined plane is abutted against the light-transmitting glass, and the part to be detected leaves the detection platform after rolling on the inclined plane.

8. The apparatus of claim 7, further comprising: a controller; the fixing piece is provided with a photoelectric sensor and used for sensing that the part to be detected enters the detection platform and sending a photographing instruction to the controller, and the controller controls at least one camera to photograph according to the received photographing instruction; and/or

9. The apparatus of any of claims 1-5, 7, 8, further comprising: and the platform wiping component is positioned above the detection platform and can move along the direction vertical to the rolling direction of the part to be detected so as to wipe the detection platform.

10. The apparatus of any of claims 1-5, 7, 8, further comprising: and the sorting assembly is positioned on one side of the detection platform and used for sorting the parts to be detected.

11. The device of claim 1, wherein the backlight source is a surface light source or a parallel light source; and at least one camera collects the surface image of the part to be detected under the coordination of the backlight source.

12. The device according to claim 1, wherein at least two of the cameras are provided with a second light source arranged along a side surface of the rolling direction of the part to be detected; and at least two cameras are used for acquiring the surface image of the part to be detected under the coordination of the second light source.

13. The device of claim 1, wherein at least one of the cameras is provided with a second light source, and the backlight source is a surface light source or a parallel light source;

14. The device according to claim 1, wherein at least one of the cameras is provided with a second light source, and the camera is arranged along the side of the rolling direction of the part to be detected;

15. The apparatus of claim 1, further comprising: the positive surface light source is arranged on one side of at least one camera; the front surface light source is a surface light source and is arranged along the side surface of the part to be detected in the rolling direction;

16. The device of claim 15, wherein a slit is arranged in front of the surface light source for generating parallel light to irradiate the part to be detected for imaging.