A full-automatic array laser perforation device and method for a spindle-shaped balloon

Abstract

This invention discloses a fully automated array laser perforation device and method for spindle-shaped balloons, belonging to the field of drug delivery device manufacturing technology. It solves the problems of low perforation efficiency, unsuitability for perforating spindle-shaped balloons, and low perforation quality in existing technologies. The device includes a stepper motor-driven conveyor plate, with rotary motors at both ends of the conveyor plate surface. Circular rings are fitted at the ends of the rotary motors, and a spindle-shaped balloon is positioned between the two circular rings. A laser is positioned above the conveyor plate, with a CCD camera fitted at the end of the laser and connected to a galvanometer. This invention improves the perforation efficiency of spindle-shaped balloons by using rotary motors on the conveyor plate to drive the spindle-shaped balloons to rotate intermittently. By utilizing the spatial positions of the CCD camera focus and the galvanometer focus, in conjunction with the rotary motors, the spindle-shaped balloons can still be perforated with holes of the same size after rotating at different angles, thus improving the perforation quality of the spindle-shaped balloons.

Description

Technical Field

[0001] This invention belongs to the field of drug delivery device manufacturing technology, and more specifically, it relates to a fully automated array laser perforation device and method for a spindle-shaped balloon. Background Technology

[0002] The clinical application of PTCA products involves using a special puncture needle in the femoral artery (or brachial artery, just with different procedures) of coronary patients. A PTCA balloon catheter and the vascular stent attached to the balloon are inserted into the blood vessel through a single, minimally invasive puncture. Under the guidance of the imaging machine, the doctor manipulates the balloon catheter to reach the coronary lesion site and controls the PTCA balloon catheter to insert the coronary stent at the lesion site to eliminate the stenosis and achieve the therapeutic goal of revascularization. Chinese patent CN112620981B discloses a laser perforation method and device for medical PTCA balloons. The method involves placing the medical PTCA balloon on an adsorption platform and using an ultraviolet laser for perforation. However, the medical PTCA balloon in this application is perforated by vacuum adsorption onto the processing platform. To uniformly perforate the outer circumference of the balloon, manual rotation is required, resulting in low perforation efficiency. Furthermore, when perforating a spindle-shaped balloon using this method, the difference in circumference between the front and rear ends and the middle requires rotating the balloon at different angles to ensure hole uniformity. However, because the galvanometer and laser positions are fixed, this method cannot effectively perforate spindle-shaped balloons. Additionally, since the galvanometer relies on deflecting internal XY lenses to move the laser spot, there will be size differences in the laser spot at different positions on the galvanometer processing surface, resulting in dimensional errors in perforations at different positions of the balloon. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a fully automated array laser perforation device and method for spindle-shaped balloons that offers high perforation efficiency, is suitable for perforating spindle-shaped balloons, and produces high-quality perforations.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the fully automated array laser perforation device and method for spindle-shaped balloons of the present invention is as follows:

[0005] A fully automated array laser perforation device for a spindle-shaped balloon includes a conveyor plate driven by a stepper motor, the stepper motor being electrically connected to a control unit. Rotary motors are positioned at both ends of the conveyor plate, with circular rings fitted at the ends of the rotary motors. A spindle-shaped balloon is positioned between the two circular rings. Air tubes at both ends of the spindle-shaped balloon pass tightly through the circular rings and extend outwards from the rotary motors. One end of each air tube is connected to an inflation unit. A laser is positioned above the conveyor plate, with a CCD camera fitted at the end of the laser and connected to a galvanometer. The relative positions of the CCD camera focus and the laser focus of the galvanometer remain constant, and the galvanometer faces the conveyor plate below.

[0006] Preferably, the CCD camera is fixedly mounted above the conveyor plate.

[0007] Preferably, the end of the rotary motor is provided with a reinforcement component to strengthen the tight connection between the circular ring and the air pipe. The reinforcement component includes a fixed seat, a telescopic rod driven by a micro cylinder is inserted through the upper part of the fixed seat, push rods are provided on both sides of the bottom of the telescopic rod, a drive rod is provided at the tail of the push rod, and the tail of the two drive rods is respectively provided with pressing pads that abut against the left and right ends of the circular ring after the two drive rods are arranged crosswise.

[0008] Preferably, the inner wall of the pressing pad is provided with a rubber pad.

[0009] A fully automated array laser perforation method for a spindle-shaped balloon includes the following steps:

[0010] S1 inflates the spindle-shaped balloon to be punched and inserts it into the rotating motors at both ends, so that the air tubes at both ends of the spindle-shaped balloon are firmly fixed in the circular ring.

[0011] S2 keeps the CCD camera position unchanged, starts the stepper motor to drive the conveyor plate to move, so that the spindle-shaped balloon moves to below the CCD camera. The CCD camera identifies the lowest point of the spindle-shaped balloon processing and constructs the zero point (0, 0, 0) in the three-dimensional coordinate space at this point.

[0012] S3 adjusts the position of the CCD camera, focuses the CCD camera on the highest point symmetrical to the lowest point of the spindle-shaped balloon, constructs the zero point (X1, Y1, Z1) in the three-dimensional coordinate space, the height h1 of the CCD camera is equal to the diameter D1 of the spindle-shaped balloon, and marks the largest circumferential diameter S1 of the spindle-shaped balloon.

[0013] Based on the spatial relative relationship between the laser processing focus and the CCD camera focus, S4 moves the stepper motor distance and raises the galvanometer height, and the control system calculates the three-dimensional coordinates (x1, y1, z1) of the laser focus.

[0014] S5 calculates the circumference s1 of the machined circle based on D1, and uses the rotational speed of the motor to obtain the time T1 for one rotation.

[0015] Based on the required spacing of the holes on the circumference and the circumference S1, S6 obtains the number of holes N1, and combines it with T1 to obtain the interval time t1 between laser light emission.

[0016] The S7 control system records the number of laser perforations N1, the interval time t1, and the power W. The rotation of the rotary motor and the laser emission start and end synchronously. The laser automatically completes the perforation on this circumference. After the perforation is completed, the control system controls the stepper motor to drive the spindle-shaped balloon back to its original position (0,0,0), and the CCD camera refocuses on the highest point (X1, Y1, Z1).

[0017] The S8 control system controls the stepper motor to move the spindle-shaped balloon to the next puncture position. The CCD camera automatically identifies the highest point (X2, Y2, Z2) at this location and calculates the three-dimensional coordinates (x2, y2, z2) of the laser focus at this location based on the difference between the spatial coordinates.

[0018] Based on the spatial axisymmetry, the control system automatically calculates the circumference radius D2 of the balloon at this location. Based on D2, the circumference S2 of the processed circumference is calculated. Combined with the rotation speed of the rotary motor, the time T2 for one rotation is obtained. Steps S6 and S7 are repeated to obtain the number of perforations N2. Based on T2, the interval time t2 for laser light emission is obtained. After the perforation is completed, the control system controls the stepper motor to drive the balloon back to its original position (0,0,0), and the CCD camera refocuses on the highest point (X1, Y1, Z1).

[0019] The S10 control system controls the CCD camera to move to the third perforation position, repeating the above action until perforation is completed at all specified positions.

[0020] Preferably, in step S1, the air tubes at both ends of the spindle-shaped balloon are connected to the inflation device, and air is injected into the spindle-shaped balloon through the inflation device and the air tubes, so that the spindle-shaped balloon remains inflated during the perforation process.

[0021] Preferably, in steps S7, S9, and S10, the laser is an ultraviolet laser used to perforate the inflated spindle-shaped balloon.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This invention improves the perforation efficiency of spindle-shaped balloons by installing a rotary motor on the conveyor plate, which drives the spindle-shaped balloon to rotate at intervals without manual rotation. By utilizing the spatial positions of the CCD camera focus and the galvanometer focus, in conjunction with the rotary motor, the spindle-shaped balloon can still be perforated with holes of the same size after rotating at different angles, improving the adaptability of the perforation process. Furthermore, by employing a fully automated array laser perforation method, perforation is performed according to the circumference of different positions on the spindle-shaped balloon, ensuring the galvanometer focus is aligned with the perforation point, thereby improving the perforation quality of the spindle-shaped balloon. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the reinforcement component in this invention.

[0026] In the diagram: 1. Conveyor plate; 2. Control unit; 3. Rotary motor; 4. Circular ring; 5. Spindle-shaped balloon; 6. Trachea; 7. Laser; 8. CCD camera; 9. Galvanometer; 10. Mounting base; 11. Telescopic rod; 12. Push rod; 13. Drive rod; 14. Pressing pad. Detailed Implementation

[0027] The invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0028] like Figure 1 — Figure 2 As shown, a fully automated array laser perforation device for a spindle-shaped balloon includes a conveyor plate 1 driven by a stepper motor. The stepper motor is electrically connected to a control unit 2. Rotary motors 3 are mounted on both ends of the surface of the conveyor plate 1. Circular rings 4 are fitted onto the ends of the rotary motors 3. A spindle-shaped balloon 5 is positioned between the two circular rings 4. Air tubes 6 at both ends of the spindle-shaped balloon 5 pass tightly through the circular rings 4 and extend outwards from the rotary motors 3. One end of the air tube 6 is connected to an inflation unit. A laser 7 is mounted above the conveyor plate 1. A CCD camera 8 is fitted onto the end of the laser 7 and connected to a galvanometer 9. The CCD camera 8 is fixedly mounted above the conveyor plate 1. The relative positions of the focal point of the CCD camera 8 and the laser focal point of the galvanometer 9 remain unchanged. The galvanometer 9 is directly opposite the conveyor plate 1 below.

[0029] The rotary motor 3 has a reinforcing component at its end to ensure a tight connection between the circular ring 4 and the air tube 6. The reinforcing component includes a fixing base 10, with a telescopic rod 11 driven by a micro-cylinder passing through its upper part. Push rods 12 are positioned on both sides of the bottom of the telescopic rod 11, and a drive rod 13 is located at the tail of each push rod 12. The two drive rods 13 are crossed, and their tails are respectively equipped with pressing pads 14 that abut against the left and right ends of the circular ring 4. The inner wall of each pressing pad 14 is lined with a rubber pad. By providing a reinforcing component on the outside of the circular ring 4, the air tube 6 remains tightly fitted to the circular ring 4 after inflation. This allows the air tubes at both ends to rotate synchronously with the drive of the rotary motor 3, providing a basis for maintaining consistent perforation of the spindle-shaped balloon.

[0030] A fully automated array laser perforation method for a spindle-shaped balloon includes the following steps:

[0031] S1 inflates the spindle-shaped balloon to be punched and inserts it into the rotating motors at both ends, so that the air tubes at both ends of the spindle-shaped balloon are firmly fixed in the circular ring.

[0032] S2 keeps the CCD camera position unchanged, starts the stepper motor to drive the conveyor plate to move, so that the spindle-shaped balloon moves to below the CCD camera. The CCD camera identifies the lowest point of the spindle-shaped balloon processing and constructs the zero point (0, 0, 0) in the three-dimensional coordinate space at this point.

[0033] S3 adjusts the position of the CCD camera, focuses the CCD camera on the highest point symmetrical to the lowest point of the spindle-shaped balloon, constructs the zero point (X1, Y1, Z1) in the three-dimensional coordinate space, the height h1 of the CCD camera is equal to the diameter D1 of the spindle-shaped balloon, and marks the largest circumferential diameter S1 of the spindle-shaped balloon.

[0034] Based on the spatial relative relationship between the laser processing focus and the CCD camera focus, S4 moves the stepper motor distance and raises the galvanometer height, and the control system calculates the three-dimensional coordinates (x1, y1, z1) of the laser focus.

[0035] S5 calculates the circumference s1 of the machined circle based on D1, and uses the rotational speed of the motor to obtain the time T1 for one rotation.

[0036] Based on the required spacing of the holes on the circumference and the circumference S1, S6 obtains the number of holes N1, and combines it with T1 to obtain the interval time t1 between laser light emission.

[0037] The S7 control system records the number of laser perforations N1, the interval time t1, and the power W. The rotation of the rotary motor and the laser emission start and end synchronously. The laser automatically completes the perforation on this circumference. After the perforation is completed, the control system controls the stepper motor to drive the spindle-shaped balloon back to its original position (0,0,0), and the CCD camera refocuses on the highest point (X1, Y1, Z1).

[0038] The S8 control system controls the stepper motor to move the spindle-shaped balloon to the next puncture position. The CCD camera automatically identifies the highest point (X2, Y2, Z2) at this location and calculates the three-dimensional coordinates (x2, y2, z2) of the laser focus at this location based on the difference between the spatial coordinates.

[0039] Based on the spatial axisymmetry, the control system automatically calculates the circumference radius D2 of the balloon at this location. Based on D2, the circumference S2 of the processed circumference is calculated. Combined with the rotation speed of the rotary motor, the time T2 for one rotation is obtained. Steps S6 and S7 are repeated to obtain the number of perforations N2. Based on T2, the interval time t2 for laser light emission is obtained. After the perforation is completed, the control system controls the stepper motor to drive the balloon back to its original position (0,0,0), and the CCD camera refocuses on the highest point (X1, Y1, Z1).

[0040] The S10 control system controls the CCD camera to move to the third perforation position, repeating the above action until perforation is completed at all specified positions.

[0041] In this invention, in step S1, the air tubes at both ends of the spindle-shaped balloon are connected to an inflation device. Air is injected into the spindle-shaped balloon through the inflation device and air tubes, keeping the balloon inflated during the perforation process. In steps S7, S9, and S10, an ultraviolet laser is used to perforate the inflated spindle-shaped balloon. During the perforation process, the inflation device continuously injects air into the air tubes, keeping the spindle-shaped balloon inflated and ensuring that the diameter of each hole remains consistent.

[0042] This invention utilizes the spatial positions of the CCD camera focus and the galvanometer focus, along with marking the spatial coordinates of different positions on the spindle-shaped balloon, to achieve array perforation of the spindle-shaped balloon. This ensures that the perforation size remains consistent, avoiding the problem in conventional laser perforation where the XY mirror inside the galvanometer causes changes in the laser spot position, resulting in different spot sizes at different positions on the galvanometer processing area and consequently, differences in balloon perforation size. This significantly improves the perforation quality of the spindle-shaped balloon.

[0043] In summary, these are merely preferred embodiments of the present invention and are not intended to limit the scope of the invention. All equivalent variations and modifications made in accordance with the shape, structure, features, and spirit of the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A fully automated array laser perforation method for a spindle-shaped balloon, employing a fully automated array laser perforation device for a spindle-shaped balloon, the device comprising a conveyor plate driven by a stepper motor, rotary motors positioned at both ends of the conveyor plate surface, circular rings fitted at the ends of the rotary motors, and a laser positioned above the conveyor plate, characterized in that... Includes the following steps: S1 inflates the spindle-shaped balloon to be punched and inserts it into the rotating motors at both ends, so that the air tubes at both ends of the spindle-shaped balloon are firmly fixed in the circular ring. S2 keeps the CCD camera position unchanged, starts the stepper motor to drive the conveyor plate to move, so that the spindle-shaped balloon moves to below the CCD camera. The CCD camera identifies the lowest point of the spindle-shaped balloon processing and constructs the zero point (0, 0, 0) in the three-dimensional coordinate space at this point. S3 adjusts the position of the CCD camera, focuses the CCD camera on the highest point symmetrical to the lowest point of the spindle-shaped balloon, constructs the zero point (X1, Y1, Z1) in the three-dimensional coordinate space, the height h1 of the CCD camera is equal to the diameter D1 of the spindle-shaped balloon, and marks the largest circumferential diameter S1 of the spindle-shaped balloon. Based on the spatial relative relationship between the laser processing focus and the CCD camera focus, S4 moves the stepper motor distance and raises the galvanometer height, and the control system calculates the three-dimensional coordinates (x1, y1, z1) of the laser focus. S5 calculates the circumference s1 of the machined circle based on D1, and uses the rotational speed of the motor to obtain the time T1 for one rotation. Based on the required spacing of the holes on the circumference and the circumference S1, S6 obtains the number of holes N1, and combines it with T1 to obtain the interval time t1 between laser light emission. The S7 control system records the number of laser perforations N1, the interval time t1, and the power W. The rotation of the rotary motor and the laser emission start and end synchronously. The laser automatically completes the perforation on this circumference. After the perforation is completed, the control system controls the stepper motor to drive the spindle-shaped balloon back to its original position (0,0,0), and the CCD camera refocuses on the highest point (X1, Y1, Z1). The S8 control system controls the stepper motor to move the spindle-shaped balloon to the next puncture position. The CCD camera automatically identifies the highest point (X2, Y2, Z2) at this location and calculates the three-dimensional coordinates (x2, y2, z2) of the laser focus at this location based on the difference between the spatial coordinates. Based on the spatial axisymmetry, the control system automatically calculates the circumference radius D2 of the balloon at this location. Based on D2, the circumference S2 of the processed circumference is calculated. Combined with the rotation speed of the rotary motor, the time T2 for one rotation is obtained. Steps S6 and S7 are repeated to obtain the number of perforations N2. Based on T2, the interval time t2 for laser light emission is obtained. After the perforation is completed, the control system controls the stepper motor to drive the balloon back to its original position (0,0,0), and the CCD camera refocuses on the highest point (X1, Y1, Z1). The S10 control system controls the CCD camera to move to the third perforation position, repeating the above action until perforation is completed at all specified positions.

2. The fully automated array laser perforation method for spindle-shaped balloons according to claim 1, characterized in that: In step S1, the air tubes at both ends of the spindle-shaped balloon are connected to the inflation device. Air is injected into the spindle-shaped balloon through the inflation device and air tubes, so that the spindle-shaped balloon remains inflated during the perforation process.

3. The fully automated array laser perforation method for spindle-shaped balloons according to claim 1, characterized in that: In steps S7, S9 and S10, an ultraviolet laser is used to perforate the inflated spindle-shaped balloon.

4. The fully automated array laser perforation method for spindle-shaped balloons according to claim 1, characterized in that: The stepper motor is electrically connected to the control unit. A spindle-shaped balloon is provided between the two circular rings. The air tubes at both ends of the spindle-shaped balloon pass tightly through the circular rings and extend outward to the outside of the rotary motor. One end of the air tube is connected to the inflation unit. A CCD camera is fitted onto the end of the laser and then connected to the galvanometer. The relative positions of the focal point of the CCD camera and the laser focal point of the galvanometer remain unchanged. The galvanometer is directly facing the conveyor plate below.

5. The fully automated array laser perforation method for spindle-shaped balloons according to claim 1, characterized in that: The CCD camera is fixedly mounted above the conveyor plate.

6. The fully automated array laser perforation method for spindle-shaped balloons according to claim 1, characterized in that: The rotary motor end is provided with a reinforcement component to strengthen the tight connection between the circular ring and the air pipe. The reinforcement component includes a fixed base, and a telescopic rod driven by a micro cylinder passes through the upper part of the fixed base. Push rods are provided on both sides of the bottom of the telescopic rod, and a drive rod is provided at the tail of the push rod. After the two drive rods are arranged crosswise, the tails are respectively provided with pressing pads that abut against the left and right ends of the circular ring.

7. The fully automated array laser perforation method for a spindle-shaped balloon according to claim 6, characterized in that: The inner wall of the pressing pad is provided with a rubber pad.

Images