A visual detection device and method with adjustable rotation and relative visual sight line posture

Abstract

The present invention discloses a visual inspection device and method with adjustable self-rotation and relative visual sight posture, including the top of the oil return hole and the top of the needle valve connected by a swing frame; the top of the oil return hole corresponds to the oil return hole end of the shaft top injector, the top of the needle valve corresponds to the needle valve end of the shaft top injector, and the injector is clamped on the shaft top by the top of the oil return hole and the top of the needle valve; including a rotary drive unit and an industrial camera, the industrial camera located on the side of the injector faces the injector to capture the appearance picture, and the rotary drive unit drives the injector to rotate circumferentially; the injector follows the swing frame to swing, so that the injector swings from a vertical posture to an inclined posture. The present invention can obtain the complete surface image of the side of the injector and the image of the gap to be detected formed by the assembly relationship of the sleeve form on the injector by setting the circumferential rotation and the inclined posture of the injector, thereby greatly improving the comprehensiveness of visual inspection of the appearance of the injector.

Description

Technical Field

[0001] The invention belongs to the technical field of visual inspection of the appearance of a fuel injector, and in particular relates to a visual inspection device and method with adjustable spin and relative visual sight line postures. Background Art

[0002] In the process of visual inspection of the appearance of the injector by taking photos, the existing technology uses a robot to grab the injector. Generally, the grabbing part is the needle valve of the injector. The grabbing part has an appearance obstruction effect on the industrial camera, which not only affects the shooting of the side of the injector, but also affects the gap to be inspected formed by the assembly relationship of the socket form on the injector. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a visual inspection device and method with adjustable rotation and relative visual line of sight posture. By rotating the injector circumferentially and setting the tilt posture, the complete surface image of the side of the injector and the image of the gap to be inspected formed by the assembly relationship of the sleeve form on the injector can be obtained, which greatly improves the comprehensiveness of the visual inspection of the injector appearance.

[0004] Technical solution: To achieve the above purpose, the present invention provides a visual detection method with adjustable rotation and relative visual sight line posture, and the specific steps are as follows:

[0005] Step 1: Install the injector on a rotatable fixture so that the axis of the injector is perpendicular to the line of sight of the industrial camera, and the industrial camera and the injector being photographed form an appropriate focusing distance;

[0006] Step 2: The industrial camera takes a horizontal shot of the injector surface. As the industrial camera moves up and down, the rotatable fixture drives the injector to rotate along the axis, allowing the industrial camera to obtain a complete surface image of the injector in a horizontal manner.

[0007] Further,

[0008] Step 3: Since there is a gap to be detected on the injector due to the socket-type assembly relationship, the gap to be detected cannot be photographed by the industrial camera in the way of "Step 2". Therefore, on the basis of "Step 2", the angle between the axis of the injector and the line of sight of the industrial camera is changed in the form of a swing fixture until the line of sight of the industrial camera can clearly capture the gap to be detected on the injector due to the socket-type assembly relationship.

[0009] Further,

[0010] Step 4: In "Step 3", the angle between the axis of the injector and the line of sight of the industrial camera changes, causing the focus distance between the lens of the industrial camera and the target object to change. Therefore, based on "Step 3":

[0011] If the injector in "Step 3" is swinging away from the industrial camera, the industrial camera is controlled to move closer to the injector so that the lens of the industrial camera and the gap to be inspected can reach an appropriate focusing distance;

[0012] If the injector in "step three" is swinging towards the direction close to the industrial camera, the industrial camera is controlled to move away from the injector so that the lens of the industrial camera and the gap to be inspected reach an appropriate focusing distance.

[0013] A visual inspection device for a visual inspection method with adjustable self-spin and relative visual sight line postures, comprising an oil return hole top and a needle valve top connected by a swing frame; the oil return hole top corresponds to the oil return hole end of a shaft top injector, the needle valve top corresponds to the needle valve end of the shaft top injector, and the injector is clamped on the shaft top by the oil return hole top and the needle valve top; comprising a rotary drive unit and an industrial camera, wherein the industrial camera located on the side of the injector faces the injector to capture the appearance of the injector, and the rotary drive unit drives the injector to rotate circumferentially; the swing frame is swingably arranged with the top point as a fixed point, and the injector follows the swing frame to swing, so that the injector swings from a vertical posture to an inclined posture.

[0014] Furthermore, the top of the oil return hole, which is driven and connected to the turnover driving part, is rotationally cooperated and arranged on the upper end side of the swing frame. The supporting top of the top of the oil return hole is a contraction-shaped structure extending into the oil return hole of the injector, and the top of the oil return hole supports the injector. A push-blocking part is arranged on the top of the oil return hole through a clamp, and the push-blocking part and the interface of the injector are push-blocking arrangements.

[0015] Furthermore, it comprises a downward pressing guide rail corresponding to the top of the needle valve; the top of the needle valve is installed on the downward pressing guide rail through a lifting plate connected by rotation; the downward pressing guide rail can drive the top of the needle valve to descend to press down the needle valve of the injector.

[0016] Furthermore, it includes a swing drive part corresponding to the swing frame; the top of the swing frame is hinged to the fixed point, and the bottom of the swing frame is connected to a telescopic component, and the swing drive part includes a slider, and the slider and the telescopic component are hinged; the swing drive part can drive the slider to translate, and the swing frame is driven to swing by the translated slider, so as to adjust the injector to swing from a vertical posture to an inclined posture.

[0017] Furthermore, the swing driving part is composed of a screw rod matched with the slider and a screw rod driving part drivingly connected to the screw rod.

[0018] Furthermore, it includes a lifting guide rail corresponding to the industrial camera, and the industrial camera is driven to move up and down by the lifting guide rail.

[0019] Furthermore, it includes a focus adjustment rail corresponding to the industrial camera, through which the industrial camera is driven to translate, so as to adjust the focus distance between the industrial camera and the injector being photographed.

[0020] Beneficial effect: The present invention adopts the method of clamping and positioning the injector by axially jacking from both ends of the injector, and then, the camera is used to take pictures of the positioned injector in an axially rotating state, so as to obtain a complete surface image of the side of the injector, and then, by adjusting the injector to make it inclined, the image of the gap to be detected formed by the assembly relationship in the form of a socket connection on the injector can be obtained, not only will there be no obstruction, but also the visual inspection will be more comprehensive and efficient, which greatly improves the comprehensiveness of the visual inspection of the injector appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Attached Figure 2 It is an enlarged schematic diagram of part of the structure at the top of the oil return hole;

[0023] Attached Figure 3 Schematic diagram of the structure of the injector rotating and tilting toward the visual inspection part Figure 1 ;

[0024] Attached Figure 4 Schematic diagram of the structure of the injector rotating and tilting toward the visual inspection part Figure 2 . DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] In the process of visual inspection of the appearance of the injector by taking photos, the existing technology uses a robot to grab the injector. Generally, the grabbing part is the needle valve of the injector. The grabbing part has an appearance obstruction effect on the industrial camera, which not only affects the shooting of the side of the injector, but also affects the gap to be inspected formed by the assembly relationship of the socket form on the injector.

[0027] A visual detection method with adjustable rotation and relative visual sight line posture, the specific steps are as follows:

[0028] Step 1: Install the injector on a rotatable fixture so that the axis of the injector is perpendicular to the line of sight of the industrial camera, and the industrial camera and the injector being photographed form an appropriate focusing distance. Figure 1As shown, a visual inspection device of a visual inspection method with adjustable rotation and relative visual sight line posture includes an oil return hole top 1 and a needle valve top 2 connected by a swing frame 9; the oil return hole top 1 corresponds to the oil return hole end of the shaft top injector 3, and the needle valve top 2 corresponds to the needle valve end of the shaft top injector 3, and the injector 3 is clamped on the shaft top by the oil return hole top 1 and the needle valve top 2.

[0029] As attached Figure 2 As shown, the oil return hole top 1 connected to the rotary drive unit 4 is rotatably arranged on the upper end side of the swing frame 9, the support top of the oil return hole top 1 is a contraction-shaped structure extending into the oil return hole 32 of the fuel injector 3, and the oil return hole top 1 supports the fuel injector 3; the oil return hole top 1 is provided with a blocking and pushing portion 12 through a clamping member 11, and the blocking and pushing portion 12 is arranged to push against the interface 33 of the fuel injector 3. When the rotary drive unit 4 provides power, the oil return hole top 1 is driven to rotate, so that the blocking and pushing portion 12 thereon blocks and pushes the interface 33 to rotate the fuel injector 3, and the blocking and pushing portion is a vertical blocking rod.

[0030] As attached Figure 1 As shown, it includes a downward pressure guide rail 8 corresponding to the needle valve top 2; the needle valve top 2 is installed on the downward pressure guide rail 8 through a lifting plate connected by rotation; the downward pressure guide rail 8 can drive the needle valve top 2 to descend to press down the needle valve 31 of the injector 3.

[0031] Step 2: The industrial camera takes a horizontal view of the injector surface. The industrial camera moves up and down while the rotatable fixture drives the injector to rotate along the axis, so that the industrial camera can obtain the complete surface image of the injector in a horizontal view. Figure 1 As shown, it includes a rotary drive unit 4 and an industrial camera 6. When the industrial camera 6 located at the side of the injector 3 faces the injector 3 to capture the appearance of the injector 3, the rotary drive unit 4 drives the injector 3 to rotate circumferentially. In addition, it includes a lifting guide rail 7 corresponding to the industrial camera 6, and the industrial camera 6 is driven to move up and down by the lifting guide rail 7.

[0032] Step 3: Since there is a gap to be detected on the injector due to the socket-type assembly relationship, the gap to be detected cannot be photographed by the industrial camera in the way of "Step 2". Therefore, based on "Step 2", the angle between the axis of the injector and the line of sight of the industrial camera is changed in the form of a swing fixture until the line of sight of the industrial camera can clearly capture the gap to be detected on the injector due to the socket-type assembly relationship. As shown in the attached figure Figure 1As shown, the swing frame 9 is swingably arranged with the top point as a fixed point, and the injector 3 swings along with the swing frame 9, so that the injector 3 swings from a vertical posture to an inclined posture. The turnover drive unit 4 is a motor. The present invention adopts the method of axial top from both ends of the injector 3 to implement the clamping and positioning of the injector 3, and then, the camera is used to take pictures of the positioned injector 3 in an axial rotation state, so as to obtain a complete surface image of the side of the injector 3, and then, by adjusting the injector 3 to make it in an inclined posture, the image of the gap to be detected formed by the assembly relationship of the sleeve form on the injector can be obtained, not only will there be no occlusion, but also the visual inspection is more comprehensive and efficient, which greatly improves the comprehensiveness of the visual inspection of the appearance of the injector.

[0033] As attached Figure 1 As shown, it includes a swing drive unit corresponding to the swing frame 9; the top of the swing frame 9 is hinged to a fixed point, and the bottom of the swing frame 9 is connected to a telescopic component 21, and the swing drive unit includes a slider 22, and the slider 22 is hinged to the telescopic component 21; the swing drive unit can drive the slider 22 to translate, and the translation of the slider 22 drives the swing frame 9 to swing, so as to adjust the injector 3 from a vertical posture to an inclined posture. Among them, the swing drive unit is composed of a screw rod 23 matched with the slider 22 and a screw rod drive unit 24 driven and connected to the screw rod 23, and the telescopic component 21 can be an elastic telescopic structural member.

[0034] Step 4: In "Step 3", the angle between the axis of the injector and the line of sight of the industrial camera changes, causing the focus distance between the lens of the industrial camera and the target object to change. Therefore, based on "Step 3":

[0035] If the injector in "Step 3" is swinging away from the industrial camera, the industrial camera is controlled to move closer to the injector so that the lens of the industrial camera and the gap to be inspected can reach an appropriate focusing distance;

[0036] If the injector in "Step 3" is swinging towards the industrial camera, the industrial camera is controlled to move away from the injector so that the lens of the industrial camera and the gap to be detected reach an appropriate focusing distance. Figure 3 and attached Figure 4 As shown, it includes a focus adjustment rail 5 corresponding to the industrial camera 6. The industrial camera 6 is set on the focus adjustment rail 5 through a lifting rail 7. The focus adjustment rail 5 drives the industrial camera 6 to translate to adjust the focus distance between the industrial camera 6 and the injector 3 being photographed.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A visual inspection method with adjustable rotation and relative visual sight line posture, characterized in that: The specific steps are as follows: Step 1: Install the injector on a rotatable fixture so that the axis of the injector is perpendicular to the line of sight of the industrial camera, and the industrial camera and the injector being photographed form an appropriate focusing distance; Step 2: The industrial camera takes a horizontal view of the injector surface. While the industrial camera moves up and down, the rotatable fixture drives the injector to rotate along the axis, so that the industrial camera can obtain a complete surface image of the injector in a horizontal view. Step 3: Since there is a gap to be detected on the injector due to the socket-type assembly relationship, the gap to be detected cannot be photographed by the industrial camera in the way of "Step 2". Therefore, on the basis of "Step 2", the angle between the axis of the injector and the line of sight of the industrial camera is changed in the form of a swing fixture until the line of sight of the industrial camera can clearly capture the gap to be detected on the injector due to the socket-type assembly relationship; Step 4: In "Step 3", the angle between the axis of the injector and the line of sight of the industrial camera changes, causing the focus distance between the lens of the industrial camera and the target object to change. Therefore, based on "Step 3": If the injector in "Step 3" is swinging away from the industrial camera, the industrial camera is controlled to move closer to the injector so that the lens of the industrial camera and the gap to be inspected can reach an appropriate focusing distance; If the injector in "step 3" is swinging towards the direction close to the industrial camera, the industrial camera is controlled to move away from the injector so that the lens of the industrial camera and the gap to be inspected can reach an appropriate focusing distance; The visual inspection device used in the visual inspection method comprises an oil return hole top (1) and a needle valve top (2) connected by a swing frame (9); the oil return hole top (1) corresponds to the oil return hole end of the shaft top injector (3), the needle valve top (2) corresponds to the needle valve end of the shaft top injector (3), and the injector (3) is clamped on the shaft top by the oil return hole top (1) and the needle valve top (2); the device comprises a rotary drive unit (4) and an industrial camera (6), wherein the industrial camera (6) located on the side of the injector (3) faces the injector (3) to capture the appearance of the injector, and the rotary drive unit (4) drives the injector (3) to rotate in a circumferential direction; the swing frame (9) is swingably arranged with the top point as a fixed point, and the injector (3) swings along with the swing frame (9), so that the injector (3) swings from a vertical posture to an inclined posture; The oil return hole top (1) drivingly connected to the rotary drive unit (4) is rotatably arranged on the upper end side of the swing frame (9); the support top of the oil return hole top (1) is a contraction-shaped structure extending into the oil return hole (32) of the fuel injector (3); the oil return hole top (1) supports the fuel injector (3); a blocking and pushing portion (12) is arranged on the oil return hole top (1) through a clamping member (11); the blocking and pushing portion (12) and the interface (33) of the fuel injector (3) are blocked and pushed; It comprises a downward pressing guide rail (8) corresponding to the top of the needle valve (2); the top of the needle valve (2) is mounted on the downward pressing guide rail (8) via a lifting plate that is rotatably connected; the downward pressing guide rail (8) can drive the top of the needle valve (2) to descend to press down the needle valve (31) of the injector (3); The invention comprises a swing drive unit corresponding to a swing frame (9); the top of the swing frame (9) is hinged to a fixed point, and the bottom of the swing frame (9) is connected to a telescopic component (21); the swing drive unit comprises a slider (22), and the slider (22) is hinged to the telescopic component (21); the swing drive unit can drive the slider (22) to translate, and the translation of the slider (22) drives the swing frame (9) to oscillate, so as to adjust the injector (3) to swing from a vertical posture to an inclined posture.

2. A visual detection method with adjustable rotation and relative visual sight line posture according to claim 1, characterized in that: The swing driving part is composed of a screw rod (23) matched with the slider (22) and a screw rod driving part (24) drivingly connected to the screw rod (23).

3. A visual detection method with adjustable rotation and relative visual sight line posture according to claim 1, characterized in that: It comprises a lifting guide rail (7) corresponding to the industrial camera (6), and the industrial camera (6) is driven to move up and down by the lifting guide rail (7).

4. A visual detection method with adjustable rotation and relative visual sight line posture according to claim 3, characterized in that: It comprises a focus adjustment rail (5) corresponding to the industrial camera (6), and the focus adjustment rail (5) drives the industrial camera (6) to translate, thereby adjusting the focus distance between the industrial camera (6) and the injector (3) being photographed.

Images