High-precision iris positioning device based on machine vision

Abstract

The utility model discloses a high-precision iris positioning device based on machine vision in the technical field of medical equipment, which comprises a base, an iris positioning component, a lower jaw bracket and a head fixing plate, and is characterized in that the bracket capable of floating up and down is arranged at the top of the base, and a lifting block is arranged below the bracket; two head fixing plates are arranged at the positions, located on the two sides of the bracket, of the top of the base respectively and connected with a lifting block, when a user conducts iris positioning, the lower jaw is placed at the top of the bracket and naturally put down, and the lower jaw bracket drives the lifting block to move downwards and drives the two head fixing plates to get close to each other under the gravity effect; the head of the user can be positioned through the iris positioning instrument until the two head fixing plates assist in clamping the head of the user, and the neck of the user can be relaxed during positioning through assisting force bearing of the head, so that the problems of aching pain and the like of the neck of the user during long-time positioning operation of the user can be greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely is a high accuracy iris positioning device based on machine vision. BACKGROUND

[0002] Iris positioning is the technology that the effective area of iris is accurately divided through analyzing eye image, and its core task is to determine the inner boundary of iris and pupil, the outer boundary of iris and sclera. Mainstream method contains two kinds of technical routes based on image processing (such as Hough transform, edge detection) and machine learning (such as convolution neural network), and typical process includes pupil rough positioning, boundary point search, subpixel level accurate positioning and other steps. The technology supports iris feature extraction in the field of biological recognition, realizes dynamic tracking correction in ophthalmic surgery, and the performance index shows that positioning accuracy can reach 97.5% and processing time is less than 50ms.

[0003] The existing iris positioning device based on machine vision needs to place the lower jaw on the bracket, but when positioning, the user's head lacks auxiliary force bearing structure, and long-time operation can easily cause neck pain and other problems of the user. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above and / or the existing problems in a high-precision iris positioning device based on machine vision, the utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a high-precision iris positioning device based on machine vision, which can relax the neck of the user during positioning by auxiliary force bearing of the head, and can greatly reduce the neck pain and other problems of the user during long-time positioning operation.

[0007] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0008] A high-precision iris positioning device based on machine vision comprises:

[0009] The base is symmetrically provided with two first fixed plates at the tail end of the top;

[0010] The iris positioning assembly is installed at the front end of the top of the base and is used for scanning and positioning the iris of the user;

[0011] A mandibular support, wherein a rubber pad is installed on the top of the mandibular support, a connecting seat is installed on the bottom of the mandibular support, a lifting block is installed on the bottom of the connecting seat, a spring is installed on the bottom of the lifting block, and the bottom end of the spring is connected to the top of the base;

[0012] The head fixing plate consists of two plates symmetrically located on either side of the two first fixing plates. A connecting plate is installed on the side wall of each head fixing plate, and a sliding plate is installed on the other end of the connecting plate. The sliding plate is connected to the lifting block. When the lifting block moves downward, the two sliding plates move closer to each other, and when the lifting block moves upward, the two sliding plates move further apart.

[0013] As a preferred embodiment of the high-precision iris positioning device based on machine vision described in this utility model, the iris positioning component includes an electric slide rail installed at the front end of the top of the base, an electric lifting frame connected inside the electric slide rail, and an iris positioning instrument body connected inside the electric lifting frame.

[0014] In a preferred embodiment of the high-precision iris positioning device based on machine vision described in this utility model, a gear is rotatably connected to the inner wall of the first fixed plate, a slide groove is provided on the side wall of the lifting block, the gear is located inside the slide groove, a rack is installed on the inner wall of the slide groove, the rack meshes with the gear, a first pulley is rotatably connected to the outer wall of the first fixed plate, the first pulley and the gear are coaxially fixedly connected, two second fixed plates are symmetrically installed on the top of the base, a threaded rod is rotatably connected to the side wall of the second fixed plate, a second pulley is rotatably connected to the side wall of the first fixed plate, the second pulley is located below the first pulley and the first pulley and the second pulley are connected by a belt, a threaded hole is provided on the side wall of the sliding plate, and the threaded rod rotatably passes through the threaded hole.

[0015] As a preferred embodiment of the high-precision iris positioning device based on machine vision described in this utility model, the top of the base is provided with a guide groove, the bottom of the slide is provided with a guide plate, the guide plate is located inside the guide groove, the top of the base is provided with a guide rod, the bottom of the lifting block is provided with a guide hole corresponding to the guide rod, and the guide rod extends into the guide hole.

[0016] As a preferred embodiment of the high-precision iris positioning device based on machine vision described in this utility model, a one-way rack is installed on the top of the base, a one-way gear is rotatably connected to the side wall of the lifting block, the one-way gear meshes with the one-way rack, a third pulley is installed on the side wall of the one-way gear, a groove is opened on the top of the rubber pad, the groove extends to the bottom of the chin support, two third fixing plates are symmetrically installed on the top of the connecting seat, a reciprocating threaded rod is rotatably connected between the two third fixing plates, a first helical gear is rotatably connected to the side wall of one of the third fixing plates, the reciprocating threaded rod is coaxially fixedly connected to the first helical gear, a fourth fixing plate is installed on the top of the lifting block, a fourth pulley is rotatably connected to the side wall of the fourth fixing plate, the fourth pulley is connected to the third pulley by a belt, a second helical gear is rotatably connected to the other side wall of the fourth fixing plate, the second helical gear is coaxially fixedly connected to the fourth pulley, and the second helical gear meshes with the first helical gear.

[0017] As a preferred embodiment of the high-precision iris positioning device based on machine vision described in this utility model, it further includes a cleaning plate located at the top of the chin support. An extension plate is installed at the bottom of the cleaning plate, which passes through the slot and extends between the two third fixing plates. A reciprocating threaded hole is provided on the side wall of the extension plate, and a reciprocating threaded rod rotates through the reciprocating threaded hole. A wiping cloth is installed at the bottom of the cleaning plate.

[0018] Compared with existing technologies: By setting a floating bracket at the top of the base and a lifting block below the bracket, and setting two head fixing plates on both sides of the bracket at the top of the base, the two head fixing plates are connected to the lifting block. When the user performs iris positioning, he places his chin on the top of the bracket and lets it hang down naturally. Under the influence of gravity, the chin bracket moves the lifting block downward and moves the two head fixing plates closer together until the two head fixing plates assist in clamping the user's head. At this time, the iris positioning device can be used for positioning. With the head assisting in bearing the force, the user can relax his neck during positioning, which can greatly reduce the soreness and other problems caused by the user's neck during long positioning operations. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1This is an overall structural diagram of a high-precision iris positioning device based on machine vision according to this utility model;

[0021] Figure 2 This is a structural diagram of the base of a high-precision iris positioning device based on machine vision according to this utility model;

[0022] Figure 3 This is a structural diagram of a mandibular support for a high-precision iris positioning device based on machine vision, according to this utility model.

[0023] Figure 4 This is a structural diagram of the head fixing plate of a high-precision iris positioning device based on machine vision according to this utility model.

[0024] Figure descriptions: 100, base; 110, first fixing plate; 110a, gear; 110a-1, first pulley; 110b, second pulley; 120, second fixing plate; 120a, threaded rod; 120b, guide groove; 130, guide rod; 140, one-way rack;

[0025] 200. Iris positioning component; 210. Electric slide rail; 220. Electric lifting frame; 230. Iris positioning device body;

[0026] 300, Mandibular bracket; 310, Rubber pad; 310a, Slot; 320, Connecting seat; 320a, Third fixing plate; 320a-1, Reciprocating threaded rod; 320a-2, First helical gear; 330, Lifting block; 330a, Spring; 330b, Slide groove; 330b-1, Rack; 330c, One-way gear; 330c-1, Third pulley; 330d, Fourth fixing plate; 330d-1, Fourth pulley; 330d-2, Second helical gear;

[0027] 400. Head fixing plate; 410. Connecting plate; 420. Slide plate; 420a. Threaded hole; 420b. Guide plate;

[0028] 500. Cleaning plate; 510. Extension plate; 520. Reciprocating threaded hole; 530. Wiping cloth. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0032] This invention provides a high-precision iris positioning device based on machine vision. By using head-assisted support, it allows users to relax their necks during positioning, which can greatly reduce neck pain and other problems caused by prolonged positioning operations.

[0033] Figures 1-4 The diagram shown is a structural schematic of one embodiment of the high-precision iris positioning device based on machine vision according to this utility model. Please refer to [link / reference]. Figures 1-4 This embodiment of a high-precision iris positioning device based on machine vision includes a base 100, an iris positioning component 200, a chin support 300, a head fixing plate 400, and a cleaning plate 500.

[0034] Two first fixing plates 110 are symmetrically installed at the top and rear ends of the base 100.

[0035] The iris positioning component 200 is installed at the top front end of the base 100 and is used to scan and position the user's iris. The iris positioning component 200 includes an electric slide rail 210 installed at the top front end of the base 100, an electric lifting frame 220 connected inside the electric slide rail 210, and an iris positioning device body 230 connected inside the electric lifting frame 220. The electric slide rail 210 can be used to adjust the front and rear positions of the electric lifting frame 220 and the iris positioning device body 230, and the electric lifting frame 220 can be used to adjust the up and down positions of the iris positioning device body 230.

[0036] The chin support 300 is located between two electric slide rails 210. A rubber pad 310 is installed on the top of the chin support 300, and a connecting seat 320 is installed at the bottom of the chin support 300. A lifting block 330 is installed at the bottom of the connecting seat 320, and a spring 330a is installed at the bottom of the lifting block 330. The bottom end of the spring 330a is connected to the top of the base 100. There are two head fixing plates 400, which are symmetrically located on both sides of the two first fixing plates 110. A connecting plate 410 is installed on the side wall of the head fixing plate 400, and a sliding plate 420 is installed at the other end of the connecting plate 410. The sliding plate 420 is connected to the lifting block 330. When the lifting block 330 moves downward, the two sliding plates 420 move closer to each other. When the lifting block 330 moves upward, the two sliding plates 420 move away from each other. A gear 110a is rotatably connected to the inner wall of the first fixed plate 110. A groove 330b is provided on the side wall of the lifting block 330, with the gear 110a located inside the groove 330b. A rack 330b-1 is installed on the inner wall of the groove 330b, meshing with the gear 110a. A first pulley 110a-1 is rotatably connected to the outer wall of the first fixed plate 110, and the first pulley 110a-1 is coaxially fixedly connected to the gear 110a. Two second fixed plates 120 are symmetrically installed on the top of the base 100. A threaded rod 120a is rotatably connected to the side wall of the second fixed plate 120. A second pulley 110b is rotatably connected to the side wall of the fixed plate 110. The second pulley 110b is located below the first pulley 110a-1, and the first pulley 110a-1 and the second pulley 110b are connected by a belt. A threaded hole 420a is opened on the side wall of the slide plate 420, and a threaded rod 120a rotates through the threaded hole 420a. When the user's chin is at the top of the chin support 300, the rubber pad 310 protects the user's chin. As the user relaxes naturally, the chin support 300 and the lifting block 330 are pushed downward and the spring 330a is compressed. When the lifting block 330 moves downward, the rack 330b-1 drives the gear 110a and the first belt. When wheel 110a-1 rotates, the first pulley 110a-1 rotates, and the belt drives the second pulley 110b and threaded rod 120a to rotate. When the threaded rod 120a rotates, the screw structure pushes the slide plate 420 to move towards the first fixed plate 110, that is, the two slide plates 420 move closer to each other, which in turn drives the two head fixed plates 400 to move closer to each other until the two head fixed plates 400 clamp the user's head, assisting the chin support 300 to bear the force and prevent the user's neck from soreness due to long-term operation. When the positioning is completed, the user's head is upward, the spring 330a rebounds and pushes the lifting block 330 to return to its original position, which drives the two head fixed plates 400 to move away from each other and return to their original position.

[0037] The base 100 has a guide groove 120b at its top, and the slide plate 420 has a guide plate 420b installed at its bottom. The guide plate 420b is located inside the guide groove 120b. The base 100 has a guide rod 130 installed at its top. The bottom of the lifting block 330 has a guide hole corresponding to the guide rod 130. The guide rod 130 extends into the guide hole. When the slide plate 420 moves, the guide plate 420b slides inside the guide groove 120b to guide the movement of the slide plate 420. Similarly, when the lifting block 330 moves up and down, the guide rod 130 slides inside the guide hole at the bottom of the lifting block 330 to guide the lifting block 330 and the chin support 300.

[0038] A one-way rack 140 is mounted on the top of the base 100. A one-way gear 330c is rotatably connected to the side wall of the lifting block 330. The one-way gear 330c meshes with the one-way rack 140. A third pulley 330c-1 is mounted on the side wall of the one-way gear 330c. A slot 310a is opened on the top of the rubber pad 310, extending to the bottom of the chin support 300. Two third fixing plates 320a are symmetrically mounted on the top of the connecting seat 320. A reciprocating threaded rod 320a-1 is rotatably connected between the two third fixing plates 320a. A first helical gear 320a-1 is rotatably connected to the side wall of one of the third fixing plates 320a. 2. The reciprocating threaded rod 320a-1 is coaxially and fixedly connected to the first helical gear 320a-2. A fourth fixed plate 330d is installed on the top of the lifting block 330. A fourth pulley 330d-1 is rotatably connected to the side wall of the fourth fixed plate 330d. The fourth pulley 330d-1 is connected to the third pulley 330c-1 via a belt. A second helical gear 330d-2 is rotatably connected to the other side wall of the fourth fixed plate 330d. The second helical gear 330d-2 is coaxially and fixedly connected to the fourth pulley 330d-1. The second helical gear 330d-2 meshes with the first helical gear 320a-2. (Cleaning plate) 500 is located at the top of the chin support 300. An extension plate 510 is installed at the bottom of the cleaning plate 500. The extension plate 510 passes through the slot 310a and extends between the two third fixing plates 320a. A reciprocating threaded hole 520 is provided on the side wall of the extension plate 510. A reciprocating threaded rod 320a-1 rotates through the reciprocating threaded hole 520. A wiping cloth 530 is installed at the bottom of the cleaning plate 500. When the spring 330a pushes the lifting block 330 upward, the one-way rack 140 drives the one-way gear 330c and the third pulley 330c-1 to rotate. When the third pulley 330c-1 rotates, it drives the fourth pulley 3 using a belt. The second helical gear 330d-2 rotates, and the second helical gear 330d-2 drives the first helical gear 320a-2 and the reciprocating threaded rod 320a-1 to rotate. When the reciprocating threaded rod 320a-1 rotates, it uses the screw structure to push the extension plate 510 to drive the cleaning plate 500 and the wiping cloth 530 to move back and forth on the top of the chin support 300. The wiping cloth 530 removes the skin flakes and other residues left by the user on the top of the rubber pad 310. Not shown in the figure, in the initial state, the cleaning plate 500 is located on both sides of the rubber pad 310 on the top of the chin support 300, which does not affect the user's chin from being placed on the top of the rubber pad 310.

[0039] Combination Figures 1-4This embodiment of a high-precision iris positioning device based on machine vision involves the user placing their chin on top of the chin support 300 and relaxing their neck when the iris needs to be scanned. The chin naturally pushes the chin support 300 and the lifting block 330 downwards. As the lifting block 330 moves downwards, it causes the two head fixing plates 400 to move closer together until the two head fixing plates 400 provide auxiliary fixation for the user's head. At this time, the head fixing plates 400 assist the chin support 300 in bearing the force on the user's head, which can reduce the frequency of the user's neck exertion during scanning and reduce the user's neck pain. At the same time, after the scan is completed, the spring 330a pushes the lifting block 330 and the chin support 300 to spring back to their original position. The one-way rack 140 drives the reciprocating threaded rod 320a-1 to rotate, pushing the extension plate 510 to drive the cleaning plate 500 and the wiping cloth 530 to move back and forth on the top of the chin support 300, removing skin flakes and other debris left on the surface of the rubber pad 310.

[0040] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-precision iris positioning device based on machine vision, characterized in that, include: The base (100) has two first fixing plates (110) symmetrically installed at the top and rear ends of the base (100); An iris positioning component (200) is installed at the top front end of the base (100) for scanning and positioning the user's iris; A mandibular support (300) is provided with a rubber pad (310) on its top and a connecting seat (320) on its bottom. A lifting block (330) is installed on the bottom of the connecting seat (320) and a spring (330a) is installed on the bottom of the lifting block (330). The bottom end of the spring (330a) is connected to the top of the base (100). Two head fixing plates (400) are symmetrically located on both sides of the two first fixing plates (110). A connecting plate (410) is installed on the side wall of the head fixing plate (400). A sliding plate (420) is installed on the other end of the connecting plate (410). The sliding plate (420) is connected to the lifting block (330). When the lifting block (330) moves downward, the two sliding plates (420) move closer to each other. When the lifting block (330) moves upward, the two sliding plates (420) move away from each other.

2. The high-precision iris positioning device based on machine vision according to claim 1, characterized in that, The iris positioning assembly (200) includes an electric slide rail (210) mounted on the top front end of the base (100), an electric lifting frame (220) connected inside the electric slide rail (210), and an iris positioning device body (230) connected inside the electric lifting frame (220).

3. The high-precision iris positioning device based on machine vision according to claim 1, characterized in that, A gear (110a) is rotatably connected to the inner wall of the first fixed plate (110). A slide groove (330b) is provided on the side wall of the lifting block (330). The gear (110a) is located inside the slide groove (330b). A rack (330b-1) is installed on the inner wall of the slide groove (330b). The rack (330b-1) meshes with the gear (110a). A first pulley (110a-1) is rotatably connected to the outer wall of the first fixed plate (110). The first pulley (110a-1) is coaxially fixedly connected to the gear (110a). The base (10... 0) Two second fixing plates (120) are symmetrically installed on the top. The side wall of the second fixing plate (120) is rotatably connected to a threaded rod (120a). The side wall of the first fixing plate (110) is rotatably connected to a second pulley (110b). The second pulley (110b) is located below the first pulley (110a-1) and the first pulley (110a-1) and the second pulley (110b) are connected by a belt. The side wall of the slide plate (420) is provided with a threaded hole (420a). The threaded rod (120a) rotates through the threaded hole (420a).

4. The high-precision iris positioning device based on machine vision according to claim 1, characterized in that, The base (100) has a guide groove (120b) on its top, and a guide plate (420b) is installed on the bottom of the slide plate (420). The guide plate (420b) is located inside the guide groove (120b). A guide rod (130) is installed on the top of the base (100). A guide hole is opened at the bottom of the lifting block (330) at a position corresponding to the guide rod (130). The guide rod (130) extends into the guide hole.

5. A high-precision iris positioning device based on machine vision according to claim 1, characterized in that, A one-way rack (140) is installed on the top of the base (100). A one-way gear (330c) is rotatably connected to the side wall of the lifting block (330). The one-way gear (330c) meshes with the one-way rack (140). A third pulley (330c-1) is installed on the side wall of the one-way gear (330c). A slot (310a) is opened on the top of the rubber pad (310), and the slot (310a) extends to the bottom of the chin support (300). Two third fixing plates (320a) are symmetrically installed on the top of the connecting seat (320). A reciprocating threaded rod (320a-1) is rotatably connected between the two third fixing plates (320a). A first helical gear is rotatably connected to the side wall of one of the third fixing plates (320a). 320a-2), the reciprocating threaded rod (320a-1) is coaxially and fixedly connected to the first helical gear (320a-2), the top of the lifting block (330) is equipped with a fourth fixing plate (330d), the side wall of the fourth fixing plate (330d) is rotatably connected to a fourth pulley (330d-1), the fourth pulley (330d-1) is connected to the third pulley (330c-1) by a belt, the other side wall of the fourth fixing plate (330d) is rotatably connected to a second helical gear (330d-2), the second helical gear (330d-2) is coaxially and fixedly connected to the fourth pulley (330d-1), and the second helical gear (330d-2) meshes with the first helical gear (320a-2).

6. A high-precision iris positioning device based on machine vision according to claim 5, characterized in that, It also includes a cleaning plate (500) located at the top of the chin support (300), an extension plate (510) installed at the bottom of the cleaning plate (500), the extension plate (510) passing through the slot (310a) and extending between the two third fixing plates (320a), a reciprocating threaded hole (520) opened on the side wall of the extension plate (510), the reciprocating threaded rod (320a-1) rotating through the reciprocating threaded hole (520), and a wiping cloth (530) installed at the bottom of the cleaning plate (500).

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