CN115032709A - Chain image detection equipment and chain image contrast detection method - Google Patents

Abstract

The invention discloses a chain image detection device and a chain image comparison detection method. The pre-tightening mechanism is located on one side of the worktable. The pre-tightening mechanism works to pre-tighten the chain to be tested. The detection mechanism and the corresponding chain parts perform projection detection. The servo chain feeding mechanism is located on the other side of the worktable. The servo chain feeding mechanism drives the tested chain. move. The use of chain image detection equipment can automatically convey and detect the chain. The detection software analyzes and processes the detection screen through image analysis, and judges whether there is any defect in each identification area. It has the advantage of non-contact detection and identification, and there is no mechanical physics in the detection part. Wear and tear, low difficulty in operation.

Description

A kind of chain image detection equipment and chain image comparison detection method

technical field

The invention relates to the technical field of chain image detection, in particular to a chain image detection device and a chain image comparison detection method.

Background technique

At present, the chain industry is still dominated by mechanical testing, mainly to detect whether the chain parts are missing. At present, there are still drawbacks in mechanical inspection. Because mechanical inspection must have contact friction, there is no problem in initial use. After half a year to one year, physical wear will lead to wear of the inspection plate or failure of springs and tension springs, resulting in failure to identify missing parts. Mechanical inspection requires professionals to regularly maintain equipment, and the frequency of maintenance increases with the frequency of use. Mechanical inspection requires self-inspection every day, that is, passing the defective marker chain through the inspection equipment to see if there is any inspection failure, and manual operation is time-consuming and labor-intensive.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the present invention provides a chain image detection device and a chain image comparison detection method, which has the advantages of non-contact detection and identification, no mechanical and physical wear on the detection part, and low operation difficulty.

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a detection device for chain images,

Including workbench; adjustable rack is installed at the bottom of the workbench;

Chain pre-tightening mechanism; the chain pre-tightening mechanism is located on one side of the workbench, and the pre-tightening mechanism works to pre-tighten the detected chain;

Detection mechanism; the detection mechanism performs projection detection with the corresponding chain parts;

Servo chain feeding mechanism; the servo chain feeding mechanism is located on the other side of the worktable, and the servo chain feeding mechanism drives the detected chain to move.

Preferably: a groove is provided on the worktable, the detection mechanism includes an image detection camera, a camera support, a backlight light source and a light source support, the bottom of the worktable is provided with a light source support under the groove, the backlight light source is installed on the light source support, and the image The detection camera is installed on the workbench through the camera bracket, the image detection camera corresponds to the backlight source, the center position of the backlight source is directly opposite to the center position of the object to be measured, and a protective cover is arranged behind the backlight source.

Preferably: the workbench is provided with a base, an indicator light and a control computer, the base is connected to the workbench through a support column, and the control computer and the indicator light are installed on the base.

Preferably: the chain preloading mechanism includes a first fixed baffle, a first movable baffle and a first cylinder, the first cylinder is connected to the first movable baffle, and the first movable baffle is directly opposite to the corresponding first fixed baffle Correspondingly, the first cylinder pushes out the first movable baffle to cooperate with the first fixed baffle.

Preferably: the servo chain feeding machine includes a servo motor and a sprocket, the front end of the servo motor is fixed to the worktable through a flange, the sprocket is fixed to the main shaft of the servo motor through a sleeve, and a sprocket baffle is arranged on the outside of the sprocket, and the sprocket corresponds to a The side is provided with a pre-channel assembly.

Preferably: the pre-channel assembly includes a second fixed baffle, a second movable baffle and a second cylinder, the second cylinder is connected to the second movable baffle, and the second movable baffle is opposite to the corresponding second fixed baffle. , the second cylinder pushes out the second movable baffle to cooperate with the second fixed baffle.

Preferably: the sprocket baffle is provided with a proximity switch seat and a proximity switch, the proximity switch is fixed on one side of the sprocket baffle through the proximity switch seat, and one end of the proximity switch senses the sprocket tooth position.

Preferably: baffles are arranged on both sides of the image detection camera, and a cover is installed on the upper side of the baffles. A protective ring is formed to effectively protect the detection camera.

A method for contrast detection of chain images, which is characterized by the following steps:

S1. Put the chain that has been assembled in the loop into the testing equipment, press the testing start button, the first cylinder and the second cylinder are pushed out at the same time, the first cylinder pushes out the first movable baffle and the first fixed baffle cooperates to clamp the detection chain;

S2. After the second cylinder is sensed, the second cylinder pushes out the second movable baffle and cooperates with the second fixed baffle to form the tested chain transfer channel;

S3. After the second cylinder is pushed out, start the servo motor, and the servo motor drives the sprocket to rotate. The servo motor will tension the chain between the first cylinder and the second cylinder according to the number of nodes to be detected, and eliminate the gap between the chain links. gap, to prevent inaccurate detection;

S4. The chain to be detected is located in the detection mechanism, and the proximity switch will detect the rotation frequency of the sprocket, thereby synchronizing the frequency of image shooting. The three are synchronized. The rotation of the sprocket triggers the image detection camera synchronously, and the image detection camera takes pictures of the chain synchronously;

S5. The camera controller obtains the image signal collected by the image detection camera through TCP communication, so as to obtain the detection picture. The detection software analyzes and processes the detection picture through image analysis, and obtains the result. Through the image analysis, there will be an alarm and shutdown for missing parts.

Preferably: the image can identify the area setting, the outside of the area does not participate in the identification calculation, the area setting includes the inner and outer chain plates on the chain set the same as the identification area, the inner and outer chain plates under the chain are set the same as the identification area, and the width of the rollers Identification area, pin height identification area, and whether the sleeve has an identification area;

The inner and outer chain plates on the chain are set to the same identification area to reduce the number of calibration tools. If one of the inner and outer chain plates on the chain is missing or damaged, the identification area will be reduced, which is used to determine the lack or damage of the chain plates;

The inner and outer chain plates under the chain are set to the same identification area to reduce the number of calibration tools. If one of the inner and outer chain plates under the chain is missing or damaged, the identification area will be reduced, which is used to determine the missing or damaged chain plates;

In the roller width identification area, there is a difference between the calibration width and the identification width, which is used to determine the lack of rollers or the wrong installation of rollers;

In the pin height identification area, there is a difference between the calibration height and the identification height, which can determine the missing or short pin.

Whether the sleeve has an identification area, the difference between the roller spacing and the pin spacing can be determined by comparing the roller spacing and the pin spacing.

The present invention has beneficial effects as follows:

The chain image detection equipment can be used to automatically convey and detect the chain. The servo motor will drive into the detection mechanism according to the number of nodes to be detected. The proximity switch will detect the rotation frequency of the sprocket, thereby synchronizing the image shooting frequency. The rotation of the wheel synchronously triggers the image detection camera, the image detection camera takes pictures of the chain synchronously, and the movement of the photographed chain synchronously transmits the captured picture for display. It has the advantages of non-contact detection and identification, there is no mechanical and physical wear on the detection part, and the operation difficulty is low.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is another angle structure schematic diagram of the present invention;

Fig. 3 is the plane structure schematic diagram of the present invention;

Fig. 4 is the structure schematic diagram of the workbench in the present invention;

5 is a schematic structural diagram of a detection mechanism in the present invention;

6 is a schematic diagram of a graphically identifiable area of the detection screen acquisition chain;

FIG. 7 is a schematic diagram of a graphically recognizable area of a detection screen acquisition chain.

Reference numerals: 1. Workbench; 2. Adjustable frame; 3. Chain preloading mechanism; 31. First fixed baffle; 32, First movable baffle; 33, First cylinder; 34, Second fixed baffle; 35, second movable baffle; 36, second cylinder; 37, second fixed baffle; 4, detection mechanism; 41, image detection camera; 42, camera bracket; 43, backlight light source; 44, light source bracket ;45, baffle plate; 46, cover plate; 5, servo chain feeding mechanism; 51, servo motor; 52, sprocket; 53, proximity switch seat; 54, proximity switch; 55, sprocket baffle; 6, groove ; 7, protective cover; 8, base; 9, indicator light; 10, control computer.

Detailed ways

The preferred embodiments of the present invention will be further described in detail with reference to the accompanying drawings 1-7.

A chain image detection equipment, including a worktable 1, a chain pre-tightening mechanism 3, a detection mechanism 4 and a servo chain feeding mechanism 5, an adjustable frame 2 is installed at the bottom of the worktable 1, and the bottom of the adjusting bracket structure can be designed to rotate with a thread The height of the supporting feet can be adjusted; the chain pre-tightening mechanism 3 is located on one side of the workbench 1, and the pre-tightening mechanism works to pre-tighten the detected chain. The chain pre-tightening mechanism 3 includes a first fixed baffle 31, a first movable baffle 32 and the first cylinder 33, the first cylinder 33 is connected with the first movable baffle 32, the first movable baffle 32 is directly opposite to the corresponding first fixed baffle 31, and the first cylinder 33 pushes out the first movable baffle 32 Cooperate with the first fixed baffle 31 .

The detection mechanism 4 performs projection detection with the corresponding chain part. The worktable 1 is provided with a groove 6. The detection mechanism 4 includes an image detection camera 41, a camera bracket 42, a backlight light source 43 and a light source bracket 44. The bottom of the worktable 1 is located in the concave. A light source bracket 44 is arranged below the slot 6, the backlight light source 43 is installed on the light source bracket 44, the image detection camera 41 is installed on the worktable 1 through the camera bracket 42, the image detection camera 41 corresponds to the backlight light source 43, and the center of the backlight light source 43 is directly opposite. A protective cover 7 is provided on the back side of the backlight light source 43 at the center position of the object to be measured.

The servo chain feeding mechanism 5 is located on the other side of the table 1. The servo chain feeding mechanism 5 drives the detected chain to move. The servo chain feeding mechanism includes a servo motor 51 and a sprocket 52. The front end of the servo motor 51 is fixed to the table 1 through a flange. The sprocket 52 is fixed to the main shaft of the servo motor 51 through an expanding sleeve, a sprocket baffle 55 is provided on the outer side of the sprocket 52 , and a pre-channel assembly is provided on the corresponding side of the sprocket 52 .

The pre-channel assembly includes a second movable baffle 34, a second movable baffle 35 and a second cylinder 36, the second cylinder 36 is connected with the second movable baffle 35, and the second movable baffle 35 is connected with the corresponding second movable baffle 34 is directly opposite, and the second air cylinder 36 pushes out the second movable baffle 35 to cooperate with the second movable baffle 34 .

The workbench 1 is provided with a base 8 , an indicator light 9 and a control computer 10 , the base 8 is connected to the workbench 1 through a support column, and the control computer 10 and the indicator light 9 are installed on the base 8 .

The sprocket baffle 55 is provided with a proximity switch 54 seat and a proximity switch 54 , the proximity switch 54 is fixed to one side of the chain baffle through the proximity switch 54 seat, and one end of the proximity switch 54 senses the toothed position of the sprocket 52 .

Baffles 45 are arranged on both sides of the image detection camera 41 , and a cover plate 46 is installed on the upper side of the baffle 45 to form a protection ring to effectively protect the detection camera.

A method for contrast detection of chain images, which is characterized by the following steps:

S1. Put the chain that has been assembled into the testing equipment, press the testing start button, the first air cylinder 33 and the second air cylinder 36 are pushed out at the same time, and the first air cylinder 33 pushes out the first movable baffle 32 and the first fixed baffle 31 cooperate to clamp the detected chain;

S2. After the second air cylinder 36 is sensed, the second air cylinder 36 pushes out the second movable baffle 35 and cooperates with the second movable baffle 34 to form a transfer channel for the chain under test;

S3. After the second cylinder 36 is pushed out, start the servo motor 51, the servo motor 51 drives the sprocket 52 to rotate, and the servo motor 51 will detect the number of segments according to the need. The chain between the two cylinders 36 is tensioned to eliminate the gap between the chain links and prevent the detection from being inaccurate; the pre-tightened two-section chain participates in the detection but will not alarm or stop;

S4. The chain to be detected is located in the detection mechanism 4, and the proximity switch 54 will detect the rotation frequency of the sprocket 52, thereby synchronizing the image shooting frequency, and the three are synchronized. The chain takes photos synchronously;

S5. The camera controller obtains the image signal collected by the image detection camera 41 through TCP communication, so as to obtain the detection picture. The detection software analyzes and processes the detection picture through image analysis, and the obtained result is displayed on the control computer 10. Through the image analysis If there is a missing part, there will be an alarm and stop, and the indicator light 9 will flash to remind.

After the detection is completed, the first cylinder 33 and the second cylinder 36 are retracted, the first cylinder 33 is sensed in place, and the first cylinder 33 and the second cylinder 36 are retracted.

Referring to Figures 6-7, the image can identify the area setting. The outside of the area does not participate in the identification calculation, which can effectively improve the identification speed. The area setting includes the inner and outer chain plates on the chain. The chain plate setting is the same as the identification area, the roller width identification area, the pin height identification area and the sleeve identification area;

The inner and outer chain plates on the chain are set to the same identification area to reduce the number of calibration tools. If one of the inner and outer chain plates on the chain is missing or damaged, the identification area will be reduced, which is used to determine the lack or damage of the chain plates;

The inner and outer chain plates under the chain are set to the same identification area to reduce the number of calibration tools. If one of the inner and outer chain plates under the chain is missing or damaged, the identification area will be reduced, which is used to determine the missing or damaged chain plates;

In the roller width identification area, there is a difference between the calibration width and the identification width, which is used to determine the lack of rollers or the wrong installation of rollers;

In the pin height identification area, there is a difference between the calibration height and the identification height, which can determine the missing or short pin.

Whether the sleeve has an identification area, the difference between the roller spacing and the pin spacing can be determined by comparing the roller spacing and the pin spacing.

The chain image detection equipment can be used to automatically convey and detect the chain. The servo motor 51 will be located in the detection mechanism 4 according to the number of nodes to be detected. The proximity switch 54 will detect the rotation frequency of the sprocket 52, thereby synchronizing the image shooting frequency. The three Synchronization, the rotation of the sprocket 52 triggers the image detection camera 41 synchronously, the image detection camera 41 takes a photo of the chain synchronously, and the photo chain moves synchronously and transmits the captured image for display. It has the advantages of non-contact detection and identification, there is no mechanical and physical wear on the detection part, and the operation difficulty is low.

The above embodiments are only used to illustrate the inventive concept of the present invention, but not to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention by using this concept should fall within the protection scope of the present invention.

Claims (10)

1. A chain image detection device is provided,

the method is characterized in that:

comprises a workbench; the bottom of the workbench is provided with an adjustable frame;

a chain pre-tightening mechanism; the chain pre-tightening mechanism is positioned on one side of the workbench, and works to pre-tighten the chain to be detected;

a detection mechanism; the detection mechanism and the corresponding chain part perform projection detection;

a servo chain feeding mechanism; the servo chain conveying mechanism is located on the other side of the workbench and drives the detected chain to move.

2. The apparatus for chain image detection as claimed in claim 1, wherein: the detection mechanism comprises an image detection camera, a camera support, a backlight source and a light source support, the light source support is arranged below the groove in the bottom of the workbench, the backlight source is installed on the light source support, the image detection camera is installed on the workbench through the camera support, the image detection camera corresponds to the backlight source, the central position of the backlight source is right opposite to the central position of an object to be detected, and a protective cover is arranged on the rear side of the backlight source.

3. The apparatus for chain image detection as claimed in claim 2, wherein: the worktable is provided with a base, an indicator light and a control computer, the base is connected with the worktable through a support column, and the control computer and the indicator light are installed on the base.

4. The apparatus for chain image detection as claimed in claim 1, wherein: the chain pre-tightening mechanism comprises a first fixed baffle, a first movable baffle and a first cylinder, the first cylinder is connected with the first movable baffle, the first movable baffle corresponds to the corresponding first fixed baffle in a right-to-face mode, and the first cylinder pushes the first movable baffle out to be matched with the first fixed baffle.

5. The apparatus for chain image detection as claimed in claim 1, wherein: the servo chain conveying machine comprises a servo motor and a chain wheel, the front end of the servo motor is fixed with the workbench through a flange, the chain wheel is fixed with a main shaft of the servo motor through an expansion sleeve, a chain wheel baffle is arranged on the outer side of the chain wheel, and a pre-channel assembly is arranged on one side, corresponding to the chain wheel.

6. The apparatus for chain image detection as claimed in claim 5, wherein: the pre-channel assembly comprises a second fixed baffle, a second movable baffle and a second cylinder, the second cylinder is connected with the second movable baffle, the second movable baffle corresponds to the corresponding second fixed baffle in a right-to-face mode, and the second cylinder pushes the second movable baffle to be matched with the second fixed baffle.

7. The apparatus for chain image detection as claimed in claim 5, wherein: the sprocket baffle is provided with proximity switch seat and proximity switch, and proximity switch is fixed in sprocket baffle one side through the proximity switch seat, and proximity switch one end response sprocket profile of tooth position.

8. The apparatus for chain image detection as claimed in claim 2, wherein: the image detection camera both sides set up the baffle, and the side-mounting apron on the baffle.

9. A method for detecting chain image contrast is characterized by comprising the following steps:

s1, putting the chain with the ring assembled and assembled into a detection device, pressing a detection starting button, simultaneously pushing out the first cylinder and the second cylinder, and pushing out the first movable baffle plate by the first cylinder to be matched with the first fixed baffle plate to clamp the detected chain;

s2, after the induction of the second cylinder, the second cylinder pushes the second movable baffle plate to be matched with the second fixed baffle plate to form a tested chain transfer channel;

s3, when the second cylinder is pushed out, a servo motor is started, the servo motor drives the chain wheel to rotate, and the servo motor can tension the chain between the first cylinder and the second cylinder according to the number of joints to be detected;

s4, the chain to be detected is located in the detection mechanism, the proximity switch can detect the rotation frequency of the chain wheel, so that the image shooting frequency is synchronized, the chain wheel rotation synchronously triggers the image detection camera, and the image detection camera synchronously shoots the chain;

s5, the camera controller acquires the image signals acquired by the image detection camera through TCP communication so as to acquire detection pictures, the detection software analyzes and processes the detection pictures through image analysis, and the detection software acquires results and alarms and stops when the images are analyzed and the images are missing.

10. The method as claimed in claim 9, wherein the step of comparing the images of the chain comprises:

the image recognizable region is set, the outside of the region does not participate in recognition calculation, the region setting comprises the same recognition region for the inner chain plate and the outer chain plate on the chain, the same recognition region for the inner chain plate and the outer chain plate under the chain, the roller width recognition region, the pin shaft height recognition region and the sleeve recognition region;

the inner chain plate and the outer chain plate on the chain are provided with the same identification area, so that calibration tools are reduced, one of the inner chain plate and the outer chain plate on the chain is lost or damaged, and the identification area is reduced for judging the loss or damage of the chain plate;

the inner chain plate and the outer chain plate under the chain are provided with the same identification area, so that calibration tools are reduced, one of the inner chain plate and the outer chain plate under the chain is lost or damaged, and the identification area is reduced for judging the loss or damage of the chain plate;

the roller width identification area is used for judging that the roller is missing or misassembled, and the difference is generated by comparing the calibration width with the identification width;

in the pin shaft height identification area, the difference occurs when the calibration height is compared with the identification height, and the missing or short pin shaft can be judged.

The sleeve has an identification area, and the defect of the sleeve can be judged by identifying the difference through the double comparison of the calibration roller distance, the pin shaft distance comparison identification roller distance and the pin shaft distance.

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