Multi-angle vision measurement device and method for small workpiece

Abstract

The invention discloses a multi-angle vision measurement device and method for a small workpiece, and relates to the technical field of workpiece vision measurement, the multi-angle vision measurement device for the small workpiece comprises two fixing plates which are symmetrically arranged, and a conveying belt is installed between the side faces, close to each other, of the two fixing plates; the tops of the two fixing plates are fixedly connected with a measuring box, and the measuring box is provided with an industrial camera. During use, the transverse positions and the longitudinal positions of the multiple sets of limiting columns can be flexibly adjusted through the arranged transverse spacing adjusting unit and the arranged longitudinal spacing adjusting unit, so that the multiple sets of limiting columns can be aligned to and attached to a plurality of inclined faces or curved faces on the front side face and the rear side face of a small workpiece respectively; therefore, the position and the angle of the small workpiece placed on the conveying belt can be accurately positioned and limited, so that a worker can quickly and accurately find and determine the position and the angle of the small workpiece, and the measuring and processing efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece visual measurement, and in particular to a multi-angle visual measurement device and method for small workpieces. Background Art

[0002] Visual measurement equipment is a high-tech product that captures and analyzes images in real time through devices such as cameras, accurately identifying the shape, size, color and other features of objects, thereby achieving high-precision detection results.

[0003] After the workpieces are produced, they need to be measured to detect and remove workpieces with unqualified dimensions in a timely manner. The traditional measurement method is for workers to use measuring tools to measure the dimensions of the workpieces. This measurement method not only has large errors, but also has extremely low measurement efficiency. Therefore, batch measurement of small workpieces through visual measuring equipment can greatly improve measurement efficiency and accuracy.

[0004] The Chinese utility model patent with patent application number CN202120341898.4 records a machine vision measuring device, which drives the mounting plate to rotate by rotating the output shaft of the motor, and the rotation of the mounting plate drives the object to rotate, so that the object is located directly below the industrial camera, and the industrial camera measures the object. During this process, objects can be fixed at other positions, realizing continuous measurement, facilitating fixation, facilitating operation, and improving measurement efficiency. However, the above-mentioned measuring device clamps the object by the second fixing plate and the first fixing plate. When there are multiple inclined surfaces or curved surfaces on the side of the object to be measured, in order to ensure the accuracy of the measurement, it is necessary to adjust the position and angle of the object between the second fixing plate and the first fixing plate in advance, so that the angle and position of each measured object are consistent to ensure the accuracy of the measurement result. However, the angle and position of the object need to be adjusted each time the object is placed, which will increase the labor intensity of the staff and prolong the time of placing the object. In addition, manual control of the angle and position of the object is prone to large deviations, which seriously reduces the efficiency and accuracy of the measurement. Summary of the invention

[0005] The object of the present invention is to provide a multi-angle visual measurement device and method for small workpieces, so as to solve the problem that the existing visual measurement equipment proposed in the above background technology needs to adjust the angle and position of the object each time the object is placed, which increases the labor intensity of the staff and prolongs the time of placing the object, and the manual control of the angle and position of the object is prone to large deviations, which seriously reduces the efficiency and accuracy of the measurement.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a multi-angle visual measurement device and method for small workpieces, comprising two symmetrically arranged fixed plates, a conveyor belt is installed between the adjacent sides of the two fixed plates, a measuring box is fixedly connected to the top of the two fixed plates, the measuring box is provided with an industrial camera, and a placement component is provided on the two fixed plates;

[0007] The placement assembly includes a transverse spacing adjustment unit, a longitudinal spacing adjustment unit is provided on the transverse spacing adjustment unit, and a plurality of pairs of limit posts are equidistantly provided on the transverse spacing adjustment unit from left to right through the longitudinal spacing adjustment unit;

[0008] The placement assembly also includes an auxiliary material placement unit arranged on the limiting column, and the auxiliary material placement unit is used to place the small workpiece on the conveyor belt more stably.

[0009] Preferably, the lateral spacing adjustment unit includes two pairs of vertical plates symmetrically fixedly connected to the tops of the two fixed plates, two guide rods are symmetrically fixedly connected between the adjacent sides of the two pairs of vertical plates, and several pairs of sliders are movably sleeved on the outer circumference of the two guide rods from left to right, and the left sides of the sliders are provided with through cavities, and the heights of the through cavities on the multiple pairs of sliders gradually decrease from left to right. The lateral spacing adjustment unit also includes several first threaded rods threadedly inserted into the left side of the left vertical plate from top to bottom, and the right ends of several of the first threaded rods pass through the left vertical plate and are rotatably connected to the left sides of multiple sliders respectively. The advantage of such a setting is that it is convenient for the staff to quickly determine the position and angle of the workpiece, improve the speed of workpiece positioning and placement, and thereby improve the efficiency of the measurement work.

[0010] Preferably, the longitudinal spacing adjustment unit includes a sliding cavity opened at the top of the slider, a first through hole opened on the side surfaces of each pair of sliders that are away from each other, a second threaded rod rotatably connected to the inner wall of each slider, the other end of the second threaded rod passes through the first through hole and is fixedly connected to a knob, two moving blocks are symmetrically threadedly sleeved on the external thread surface of each pair of the second threaded rods, two support rods are symmetrically fixedly connected to the tops of the two moving blocks, two top plates are symmetrically fixedly connected to the tops of the two support rods, each pair of limit columns are symmetrically fixedly connected to the side surfaces of each pair of two top plates that are close to each other, and the spacing between the two limit columns is smaller than the spacing between the side surfaces of each pair of two top plates that are close to each other. The advantage of such a setting is that it can effectively improve the efficiency of the measurement work, and can ensure the consistency of the position and angle of each small workpiece placed on the conveyor belt, thereby improving the measurement accuracy.

[0011] Preferably, the auxiliary blanking unit includes two first elastic members symmetrically fixedly connected to the bottom of each pair of two top plates, each pair of two first elastic members are movably sleeved on each pair of two limiting columns, and each pair of two first elastic members have two blanking rings symmetrically fixedly connected to the bottom ends, two blanking planes are symmetrically arranged on the outer circumferences of the two blanking rings, and two groups of threaded grooves are symmetrically opened on the outer circumferences of the two blanking rings, and the number of threaded grooves in each group is not less than two and is equidistantly distributed from top to bottom, and two groups of sliding columns are slidably connected in the two groups of threaded grooves, and the two groups of sliding columns are symmetrically fixedly connected to each For the two top plates, the advantage of such an arrangement is that the small workpiece can be placed directly on the top of the two groups of sliding columns. Under the action of the small workpiece's own weight, the elastic force of the first elastic member can be overcome and the blanking ring can be pressed downward to move downward. At the same time, under the limiting action of the threaded groove and the sliding column, the blanking ring will rotate ninety degrees so that the two blanking planes on each pair of two blanking rings are parallel and aligned. In this way, the blanking ring no longer blocks the small workpiece, so that the small workpiece can slide vertically smoothly onto the conveyor belt, thereby making the small workpiece fall more steadily and accurately on the top surface of the conveyor belt, further improving the accuracy of the measurement results.

[0012] Preferably, the sliding columns in each group of the threaded grooves are not in the same vertical plane. The advantage of such an arrangement is that the multiple sliding columns on each blanking ring are staggered in the horizontal direction, so as to better support the blanking ring and ensure that the blanking ring can move up and down and rotate smoothly, thereby further ensuring that the small workpiece can fall smoothly and accurately on the top surface of the conveyor belt, greatly improving the accuracy of the measurement results.

[0013] Preferably, the number of placement components on the top of the two fixed plates is not less than two, and the multiple placement components are equidistantly distributed from left to right, and the placement component from the second placement component on the left to the rightmost placement component does not include the first threaded rod, and also includes a linkage component arranged on the multiple placement components, and the linkage component is used to enable the multiple placement components to synchronously adjust the lateral spacing. The advantage of such a setting is that the staff only needs to rotate each first threaded rod once to complete the lateral position adjustment of the sliders on all the placement components, thereby further improving the efficiency of the measurement work.

[0014] Preferably, the linkage assembly includes a connecting rod fixedly connected by a round rod between the two leftmost sliders on any two adjacent placement assemblies, between the second two sliders on the left, and up to the two rightmost sliders. The advantage of such a setting is that after each rotation of a first threaded rod, under the connection action of the round rod and the connecting rod, the corresponding sliders can move laterally synchronously, thereby ensuring that the lateral position adjustment work is completed smoothly and efficiently.

[0015] Preferably, the gap between the bottom end of the limit column and the top surface of the conveyor belt is less than one millimeter, and the vertical distance between the blanking plane and the axis of the blanking ring is equal to the outer diameter of the first elastic member. The advantage of this arrangement is that it can prevent small workpieces from shifting and tilting after falling on the top surface of the conveyor belt, so that small workpieces can fall on the conveyor belt more smoothly.

[0016] A multi-angle vision measurement method for small workpieces, applicable to the multi-angle vision measurement device for small workpieces mentioned above, comprises the following steps:

[0017] S1: Determine the position and angle of the small workpiece to be measured on the conveyor belt, and then adjust the lateral spacing adjustment units according to the shapes of the front and rear sides of the small workpiece when it is placed on the conveyor belt so that multiple pairs of limit columns are aligned with different inclined surfaces on the front and rear sides of the small workpiece;

[0018] S2: Then adjust the longitudinal spacing adjustment unit so that the multiple pairs of limit columns are respectively fitted with the corresponding different inclined surfaces on the front and rear sides of the small workpiece;

[0019] S3: Place the small workpiece vertically from the upper side of the multiple pairs of limit columns to between the multiple pairs of limit columns according to the set position and angle, and then release the small workpiece to slide vertically downward along the multiple pairs of limit columns and fall on the top surface of the conveyor belt.

[0020] In summary, the technical effects and advantages of the present invention are as follows:

[0021] 1. In the present invention, the lateral and longitudinal positions of multiple groups of limit columns can be flexibly adjusted by setting a lateral spacing adjustment unit and a longitudinal spacing adjustment unit, so that multiple groups of limit columns can be respectively aligned and attached to multiple inclined surfaces or curved surfaces on the front and rear sides of the small workpiece, so that the position and angle of the small workpiece placed on the conveyor belt can be accurately positioned and limited, so that it is convenient for the staff to quickly find and determine the position and angle of the small workpiece, effectively improving the efficiency of measurement and processing, and can ensure the consistency of the position and angle of all small workpieces, thereby improving the accuracy of measurement and processing.

[0022] 2. In the present invention, the auxiliary blanking unit is provided, so that the small workpiece can be directly placed on the top of the two groups of slide columns. Under the action of the small workpiece's own weight, the elastic force of the first elastic member can be overcome and the blanking ring can be pressed downward to move downward. At the same time, under the limiting action of the thread groove and the slide column, the blanking ring will rotate ninety degrees so that the two blanking planes on each pair of two blanking rings are parallel and aligned, so that the blanking ring no longer blocks the small workpiece, so that the small workpiece can slide vertically smoothly onto the conveyor belt, so that the small workpiece can fall on the top surface of the conveyor belt more steadily and accurately, further improving the accuracy of the measurement results.

[0023] 3. In the present invention, the linkage assembly is arranged to ensure that after each rotation of a first threaded rod, under the connection between the round rod and the connecting rod, the corresponding sliders can move laterally synchronously, ensuring that the lateral position adjustment work is completed smoothly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a first structural schematic diagram of a multi-angle visual measurement device and method for small workpieces in an embodiment of the present invention;

[0026] Figure 2 A second structural schematic diagram of a multi-angle visual measurement device and method for small workpieces according to an embodiment of the present invention;

[0027] Figure 3 It is a partial structural schematic diagram of a multi-angle visual measurement device and method for small workpieces in an embodiment of the present invention;

[0028] Figure 4 It is a first structural schematic diagram of the auxiliary blanking unit in an embodiment of the present invention;

[0029] Figure 5 It is a second structural schematic diagram of the auxiliary blanking unit in an embodiment of the present invention;

[0030] Figure 6 A top view of a blanking ring in an embodiment of the present invention;

[0031] Figure 7 In the embodiment of the present invention Figure 1 The enlarged schematic diagram of point A in the middle;

[0032] Figure 8 In the embodiment of the present invention Figure 2 The enlarged schematic diagram of point B in the middle;

[0033] Fig. 9 In the embodiment of the present invention Figure 3 Enlarged schematic diagram of point C in the middle.

[0034] In the figure: 1. fixed plate; 2. conveyor belt; 3. measuring box; 31. inlet; 32. outlet; 4. placement component; 41. transverse spacing adjustment unit; 411. vertical plate; 412. guide rod; 413. slider; 414. through cavity; 415. first threaded rod; 42. longitudinal spacing adjustment unit; 421. sliding cavity; 422. first through hole; 423. second threaded rod; 424. moving block; 425. support rod; 426. top plate; 43. limiting column; 44. auxiliary blanking unit; 441. first elastic member; 442. blanking ring; 443. blanking plane; 444. threaded groove; 445. sliding column; 446. first connecting plate; 447. second connecting plate; 5. linkage component; 51. round rod; 52. connecting rod. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1

[0037] Please refer to Figure 1-Figure 9 A multi-angle visual measurement device and method for small workpieces shown in the figure comprises two symmetrically arranged fixed plates 1, a conveyor belt 2 is installed between the adjacent sides of the two fixed plates 1, a measuring box 3 is fixedly connected to the top of the two fixed plates 1, an inlet 31 and an outlet 32 ​​are respectively opened on the left and right sides of the measuring box 3, the inlet 31 and the outlet 32 ​​are symmetrically distributed, two groups of industrial cameras are symmetrically installed in the front and back of the measuring box 3, the two groups of industrial cameras are respectively located on the front and back sides of the conveyor belt 2, the angles of the two groups of industrial cameras are different so that multiple angles of the small workpiece can be measured, thereby improving the measurement effect and accuracy, and a placing component 4 is provided on the two fixed plates 1;

[0038] The placement component 4 includes a transverse spacing adjustment unit 41, a longitudinal spacing adjustment unit 42 is provided on the transverse spacing adjustment unit 41, and a plurality of pairs of limit posts 43 are equidistantly provided on the transverse spacing adjustment unit 41 from left to right through the longitudinal spacing adjustment unit 42;

[0039] The placement assembly 4 further includes an auxiliary blanking unit 44 disposed on the limiting column 43 , and the auxiliary blanking unit 44 is used to place the small workpiece on the conveyor belt 2 more stably.

[0040] refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8and Fig. 9 The lateral spacing adjustment unit 41 includes two pairs of vertical plates 411 symmetrically fixedly connected to the tops of the two fixed plates 1, two guide rods 412 are symmetrically fixedly connected between the adjacent sides of the two pairs of vertical plates 411, and a plurality of pairs of sliders 413 are movably sleeved on the outer circumference of the two guide rods 412 from left to right. A through cavity 414 is opened on the left side of the slider 413, and the height of the through cavity 414 on the multiple pairs of sliders 413 gradually decreases from left to right. The lateral spacing adjustment unit 41 also includes a plurality of first threaded rods 415 threadedly inserted into the left side of the left vertical plate 411 from top to bottom, and the right ends of the plurality of first threaded rods 415 penetrate the left vertical plate 411 and are rotatably connected to the left sides of the plurality of sliders 413 respectively.

[0041] Specifically, rotating several first threaded rods 415 respectively can drive multiple sliders 413 to slide horizontally on the guide rod 412, so that the lateral position of the slider 413 can be conveniently adjusted so that multiple pairs of limit columns 43 can be respectively aligned with multiple inclined surfaces or curved surfaces on the front and rear sides of the small workpiece, so that the limit columns 43 can reliably limit the placement position and angle of the small workpiece, which is convenient for the staff to quickly determine the position and angle of the workpiece, improve the speed of workpiece positioning and placement, and thereby improve the efficiency of the measurement work.

[0042] refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 and Fig. 9 The longitudinal spacing adjustment unit 42 includes a sliding cavity 421 opened at the top of the slider 413, and a first through hole 422 is opened on the side away from each other of each pair of sliders 413. A second threaded rod 423 is rotatably connected to the inner wall of each slider 413, and the other end of the second threaded rod 423 passes through the first through hole 422 and is fixedly connected to a knob. Two moving blocks 424 are symmetrically threadedly sleeved on the external thread surface of each pair of second threaded rods 423, and two supporting rods 425 are symmetrically fixedly connected to the top of the two moving blocks 424. Two top plates 426 are symmetrically fixedly connected to the top of the two supporting rods 425. Each pair of limiting columns 43 is symmetrically fixedly connected to the side of each pair of two top plates 426 that are close to each other, and the spacing between the two limiting columns 43 is smaller than the spacing between the side of each pair of two top plates 426 that are close to each other.

[0043] Specifically, by turning the knob to drive the second threaded rod 423 to rotate, the moving block 424 can be driven to move back and forth in the sliding cavity 421, so that multiple pairs of limit columns 43 can respectively fit with the corresponding curved surfaces or inclined surfaces on the side surfaces of the small workpieces, and then cooperate with the lateral spacing adjustment unit 41 to adjust the lateral distance of the limit columns 43, so as to accurately and reliably limit the placement position and angle of the small workpiece. In this way, the staff only needs to align each inclined surface or curved surface of the small workpiece with the corresponding limit column 43 and place the small workpiece vertically between multiple pairs of limit columns 43 to quickly complete the position adjustment of the small workpiece, effectively improving the efficiency of the measurement work, and can ensure the consistency of the position and angle of each small workpiece placed on the conveyor belt 2, thereby improving the measurement accuracy.

[0044] Example 2

[0045] According to Example 1, please refer to Figure 1-Figure 6 The auxiliary blanking unit 44 includes two first elastic members 441 symmetrically fixedly connected to the bottom of each pair of two top plates 426, each pair of two first elastic members 441 are movably sleeved on each pair of two limiting columns 43, and two blanking rings 442 are symmetrically fixedly connected to the bottom of each pair of two first elastic members 441. Two blanking planes 443 are symmetrically arranged on the outer circumferences of the two blanking rings 442, and two groups of threaded grooves 444 are symmetrically opened on the outer circumferences of the two blanking rings 442. The number of each group of threaded grooves 444 is not less than two and is equidistantly distributed from top to bottom. Two groups of sliding columns 445 are slidably connected in the two groups of threaded grooves 444, and a first connecting plate 446 is fixedly connected to the side of each group of sliding columns 445, and a second connecting plate 447 is fixedly connected to the side of the first connecting plate 446, and the top of the second connecting plate 447 is fixedly connected to the bottom surface of the top plate 426.

[0046] Specifically, the small workpiece can be placed directly on the top of the two groups of slide columns 445. Under the action of the small workpiece's own weight, the elastic force of the first elastic member 441 can be overcome and the blanking ring 442 can be pressed downward to move downward. At the same time, under the limiting action of the thread groove 444 and the slide column 445, the blanking ring 442 will rotate ninety degrees so that the two blanking planes 443 on each pair of two blanking rings 442 are parallel and aligned. In this way, the blanking ring 442 no longer blocks the small workpiece, so that the small workpiece can slide vertically smoothly onto the conveyor belt 2, so that the small workpiece can fall on the top surface of the conveyor belt 2 more smoothly and accurately, thereby further improving the accuracy of the measurement results.

[0047] refer to Figure 4 and Figure 5 , the sliding posts 445 in each set of thread grooves 444 are not in the same vertical plane.

[0048] Specifically, the multiple sliding columns 445 on each blanking ring 442 are staggered in the transverse direction, so as to better support the blanking ring 442 and ensure that the blanking ring 442 can move up and down and rotate smoothly, thereby further ensuring that the small workpiece can fall smoothly and accurately on the top surface of the conveyor belt 2, greatly improving the accuracy of the measurement results.

[0049] Example 3

[0050] According to Example 1 or 2, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 7 The number of placement components 4 on the top of the two fixed plates 1 is not less than two, and the multiple placement components 4 are evenly distributed from left to right. From the second placement component 4 on the left to the placement component 4 on the far right, the first threaded rod 415 is not included, and a linkage component 5 is also included on the multiple placement components 4. The linkage component 5 is used to enable the multiple placement components 4 to synchronously adjust the lateral spacing.

[0051] Specifically, the staff only needs to rotate each first threaded rod 415 once to complete the lateral position adjustment of the sliders 413 on all the placement components 4, thereby further improving the efficiency of the measurement work.

[0052] refer to Figure 2 and Figure 8 The linkage component 5 includes a connecting rod 52 fixedly connected between the two leftmost sliders 413 on any two adjacent placement components 4 through a round rod 51, between the second two sliders 413 on the left, and even between the two rightmost sliders 413.

[0053] Specifically, it is ensured that after each rotation of a first threaded rod 415, under the connection between the round rod 51 and the connecting rod 52, the corresponding slider 413 can be synchronously moved laterally, ensuring that the lateral position adjustment work is completed smoothly and efficiently.

[0054] refer to Figure 1-Figure 3 The gap between the bottom end of the limiting column 43 and the top surface of the conveyor belt 2 is less than one millimeter, and the vertical distance between the blanking plane 443 and the axis of the blanking ring 442 is equal to the outer diameter of the first elastic member 441.

[0055] Specifically, it can prevent the small workpieces from being deflected and tilted after falling on the top surface of the conveyor belt 2 , so that the small workpieces can fall on the conveyor belt 2 more stably.

[0056] A multi-angle visual measurement method for small workpieces comprises the following steps:

[0057] S1: Determine the position and angle of the small workpiece to be measured on the conveyor belt 2, and then adjust the lateral spacing adjustment unit 41 according to the shapes of the front and rear sides of the small workpiece when it is placed on the conveyor belt 2 so that multiple pairs of limit posts 43 are respectively aligned with different inclined surfaces on the front and rear sides of the small workpiece;

[0058] S2: Then adjust the longitudinal spacing adjustment unit 42 so that the multiple pairs of limit posts 43 are respectively fitted with the corresponding different inclined surfaces on the front and rear sides of the small workpiece;

[0059] S3: vertically place the small workpiece from the upper side of the plurality of pairs of limit posts 43 to between the plurality of pairs of limit posts 43 according to the set position and angle, and then release the small workpiece to allow it to slide vertically downward along the plurality of pairs of limit posts 43 and fall on the top surface of the conveyor belt 2.

[0060] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-angle visual measuring device for small workpieces, comprising two symmetrically arranged fixing plates (1), characterized in that: A conveyor belt (2) is installed between the adjacent sides of the two fixed plates (1), a measuring box (3) is fixedly connected to the top of the two fixed plates (1), the measuring box (3) is provided with an industrial camera, and a placement component (4) is provided on the two fixed plates (1); The placement assembly (4) comprises a transverse spacing adjustment unit (41), a longitudinal spacing adjustment unit (42) is provided on the transverse spacing adjustment unit (41), and a plurality of pairs of limiting columns (43) are equidistantly provided on the transverse spacing adjustment unit (41) from left to right via the longitudinal spacing adjustment unit (42); The placement assembly (4) further comprises an auxiliary material placement unit (44) arranged on the limiting column (43), and the auxiliary material placement unit (44) is used to place the small workpiece on the conveyor belt (2) more stably.

2. A multi-angle vision measuring device for small workpieces according to claim 1, characterized in that: The transverse spacing adjustment unit (41) comprises two pairs of vertical plates (411) symmetrically fixedly connected to the tops of the two fixed plates (1); two guide rods (412) are symmetrically fixedly connected between the adjacent sides of the two pairs of vertical plates (411); a plurality of pairs of sliders (413) are movably sleeved from left to right on the outer circumferences of the two guide rods (412); a through cavity (414) is provided on the left side of the slider (413); the height of the through cavity (414) on the plurality of pairs of sliders (413) gradually decreases from left to right; the transverse spacing adjustment unit (41) further comprises a plurality of first threaded rods (415) threadedly plugged from top to bottom on the left side of the left vertical plate (411); the right ends of the plurality of first threaded rods (415) penetrate the left vertical plate (411) and are rotatably connected to the left sides of the plurality of sliders (413).

3. The multi-angle vision measuring device for small workpieces according to claim 2, characterized in that: The longitudinal spacing adjustment unit (42) comprises a sliding cavity (421) provided at the top of the slider (413); a first through hole (422) is provided on the side faces away from each other of each pair of the sliders (413); a second threaded rod (423) is rotatably connected to the inner wall of each slider (413); the other end of the second threaded rod (423) passes through the first through hole (422) and is fixedly connected to a knob; two moving blocks (424) are symmetrically threadedly sleeved on the external threaded surface of each pair of the second threaded rods (423); two supporting rods (425) are symmetrically fixedly connected to the tops of the two moving blocks (424); two top plates (426) are symmetrically fixedly connected to the tops of the two supporting rods (425); each pair of the limiting columns (43) is symmetrically fixedly connected to the side faces of each pair of the two top plates (426) that are close to each other; and the spacing between the two limiting columns (43) is smaller than the spacing between the side faces of each pair of the two top plates (426) that are close to each other.

4. The multi-angle vision measuring device for small workpieces according to claim 3, characterized in that: The auxiliary blanking unit (44) comprises two first elastic members (441) symmetrically fixedly connected to the bottom of each pair of two top plates (426); each pair of two first elastic members (441) are movably sleeved on each pair of two limiting columns (43); two blanking rings (442) are symmetrically fixedly connected to the bottom of each pair of two first elastic members (441); two blanking planes (443) are symmetrically arranged on the outer circumference of the two blanking rings (442); two groups of thread grooves (444) are symmetrically opened on the outer circumference of the two blanking rings (442); the number of each group of thread grooves (444) is not less than two and is equidistantly distributed from top to bottom; two groups of sliding columns (445) are slidably connected in the two groups of thread grooves (444); the two groups of sliding columns (445) are symmetrically fixedly connected to each pair of two top plates (426).

5. The multi-angle vision measuring device for small workpieces according to claim 4, characterized in that: The sliding posts (445) in each group of the thread grooves (444) are not in the same vertical plane.

6. The multi-angle vision measuring device for small workpieces according to claim 5, characterized in that: The number of the placement components (4) on the top of the two fixed plates (1) is not less than two, and the plurality of placement components (4) are evenly distributed from left to right, and the placement components (4) from the second placement component (4) on the left to the rightmost placement component (4) do not include the first threaded rod (415), and also include linkage components (5) arranged on the plurality of placement components (4), and the linkage components (5) are used to enable the plurality of placement components (4) to synchronously adjust the lateral spacing.

7. The multi-angle vision measuring device for small workpieces according to claim 6, characterized in that: The linkage assembly (5) comprises a connecting rod (52) fixedly connected between the two leftmost sliders (413), between the second two sliders (413) on the left, and even between the two rightmost sliders (413) on any two adjacent placement assemblies (4) through a round rod (51).

8. The multi-angle vision measuring device for small workpieces according to claim 7, characterized in that: The gap between the bottom end of the limiting column (43) and the top surface of the conveyor belt (2) is less than one millimeter, and the vertical distance between the blanking plane (443) and the axis of the blanking ring (442) is equal to the outer diameter of the first elastic member (441).

9. A multi-angle vision measurement method for small workpieces, applicable to the multi-angle vision measurement device for small workpieces as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Determine the position and angle of the small workpiece to be measured when it is placed on the conveyor belt (2), and then adjust the lateral spacing adjustment unit (41) according to the shapes of the front and rear sides of the small workpiece when it is placed on the conveyor belt (2) so that multiple pairs of limit posts (43) are aligned with different inclined surfaces on the front and rear sides of the small workpiece; S2: Then, the longitudinal spacing adjustment unit (42) is adjusted so that the plurality of pairs of limit posts (43) are respectively fitted with the corresponding different inclined surfaces on the front and rear sides of the small workpiece; S3: vertically placing the small workpiece from the upper side of the plurality of pairs of limit posts (43) to between the plurality of pairs of limit posts (43) according to the set position and angle, and then releasing the hands to allow the small workpiece to slide vertically downward along the plurality of pairs of limit posts (43) and fall onto the top surface of the conveyor belt (2).

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