Height difference measuring equipment

Abstract

The utility model provides height difference measuring equipment. The height difference measuring equipment comprises a base; the storage table is movably arranged on the base; the image acquisition device is arranged above the object placing table in a liftable manner and can acquire an overall cloud point of the to-be-detected object on the object placing table; the storage driving device is in driving connection with the storage table and drives the storage table to move and / or rotate relative to the base; the calibration part is arranged on the base, the calibration part is provided with a plurality of calibration surfaces with preset height difference, the image acquisition device acquires the overall cloud point of the plurality of calibration surfaces and obtains the measured height difference, and the image acquisition device is adjusted according to the measured height difference and the preset height difference. According to the utility model, the problem of poor accuracy of a measurement result of height difference measurement in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring device technical field, specifically, relate to a height difference measuring equipment. BACKGROUND

[0002] In the production process, in order to control the correctness and quality of product assembly, need to measure relevant data after the process ends, with data whether to satisfy the predetermined requirement to judge the correctness and quality of assembly, wherein height difference is a common production process monitoring data, and the common solution has height gauge measurement, contact displacement sensor measurement, spectrum confocal displacement sensor measurement, 3D camera measurement.

[0003] In height gauge measurement, since height gauge measurement is operated by artificial, data result consistency is poor, data is difficult to save, wrong measurement and measurement time is longer. Contact displacement sensor, spectrum confocal displacement sensor, 3D point laser measurement, since for obtaining single point data, when needing to measure multiple points on reference surface and measurement surface, the commonality is poor. 3D line laser measurement, since based on triangulation, there is blind angle, and the stability of measurement data is poor, and for the case that height difference is larger, cannot be measured, and the data in Y axis direction is prone to cumulative error.

[0004] In summary, the existing height difference measurement has the problems of poor measurement result accuracy, poor commonality and inconvenient use. UTILITY MODEL CONTENTS

[0005] The utility model discloses a height difference measuring equipment, to solve the measurement result accuracy of height difference measurement in prior art is poor.

[0006] In order to realize the above-mentioned purpose, the utility model provides a height difference measuring equipment, include: base, the article table is movably arranged on the base, image acquisition device, image acquisition device is movably arranged on the top of article table, and can obtain the overall cloud point of the measured object on article table, article drive arrangement, article drive arrangement is drivenly connected with article table, and drives article table to move and / or rotate relative to base, calibration piece, calibration piece is arranged on the base, and calibration piece has a plurality of calibration surfaces with predetermined height difference, image acquisition device obtains the overall cloud point of a plurality of calibration surfaces and obtains the measurement height difference, and image acquisition device is adjusted according to the measurement height difference and predetermined height difference.

[0007] Further, the base has a stand column, and the height difference measuring equipment further includes a connecting piece movably arranged on the stand column in the longitudinal direction, the image acquisition device is arranged on the connecting piece and moves up and down synchronously with the connecting piece to change the height of the image acquisition device.

[0008] Further, the calibration member has a stepped structure, and a stepped surface of the stepped structure serves as a calibration surface with a predetermined height difference, and the height difference between two adjacent calibration surfaces is 0.995-1.005 mm.

[0009] Further, the stepped structure has a plurality of steps, and at least three stepped surfaces are formed.

[0010] Further, the article placing driving device comprises a moving driving assembly, at least a part of the moving driving assembly is movably arranged relative to the base; a rotating driving assembly, the rotating driving assembly is connected with the moving driving assembly and moves under the driving of the moving driving assembly, the rotating driving assembly is drivingly connected with the article placing table and drives the article placing table to rotate; and a moving marker, the moving marker has a marker for indicating the moving distance of the moving driving assembly.

[0011] Further, the moving driving assembly comprises a moving table, the moving table is transversely movably arranged on the base, the rotating driving assembly is arranged on the moving table, and the moving table has a reading head for cooperating with the moving marker; a threaded screw rod, the threaded screw rod is threadedly arranged on the moving table, and the threaded screw rod drives the moving table to move transversely when the threaded screw rod rotates; and a moving driving member, the moving driving member is drivingly connected with the threaded screw rod and drives the threaded screw rod to rotate.

[0012] Further, the rotating driving assembly comprises a rotating driving member, the rotating driving member is connected with the moving driving assembly and moves transversely under the driving of the moving driving assembly; an adapter, the adapter is arranged between the rotating driving member and the article placing table, and the rotating driving member drives the article placing table to rotate around the longitudinal axis through the adapter; and a bearing member, the bearing member is arranged between the article placing table and the base.

[0013] Further, the base has a first cavity and a second cavity, the article placing driving device is arranged in the first cavity, and the height difference measuring apparatus further comprises a control component, the control component is arranged in the second cavity and is electrically connected with the image acquisition device and the article placing driving device, and the control component has an operation part exposed to the base and used for operation.

[0014] Further, the first cavity and the second cavity are arranged in a layered manner, and the first cavity is arranged above the second cavity.

[0015] Further, the base has a sliding member, the sliding member is arranged in a pullable and extendable manner, and at least a part of the control component is arranged on the sliding member.

[0016] The utility model discloses a technical scheme, through the longitudinal adjustable setting mode of image acquisition device, simultaneously, the article table is movable or rotates through article drive arrangement, like this, can change the distance between image acquisition device and article table through the height adjustment of image acquisition device when measuring, thereby realizes the adjustment of height measurement range, and the adjustment of article table can drive the measured article on it together and adjust, thereby makes the measured article be located in the measurement range of image acquisition device, avoids the blind area problem caused by triangulation to the maximum, guarantees the accurate reliable of measurement. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The illustrations are shown to explain the present application and are not intended to limit the present application unduly.

[0018] Figure 1 Fig. 1 shows the structure schematic diagram of the height difference measurement equipment of the utility model;

[0019] Figure 2 Fig. 2 shows the enlarged view of the image acquisition device in Fig. 1; Figure 1

[0020] Figure 3 Fig. 3 shows the structure schematic diagram of the calibration piece in Fig. 1; Figure 1

[0021] Figure 4 Fig. 4 shows the structure schematic diagram of the moving drive assembly;

[0022] Figure 5 Fig. 5 shows the structure schematic diagram of the rotating drive assembly;

[0023] Figure 6 Fig. 6 shows the main sectional view of the seat table;

[0024] Figure 7 Fig. 7 shows the front view of the seat table.

[0025] Among them, the above-mentioned drawing includes the following figure mark:

[0026] ​​10. Base; 11. Column; 12. First cavity; 13. Second cavity; 14. Sliding component; 15. Front panel; 16. Bearing bracket; 20. Display platform; 30. Image acquisition device; 40. Display drive device; 41. Motion drive assembly; 411. Moving stage; 412. Lead screw; 413. Motion drive component; 414. Linear guide rail; 415. Tank chain; 416. Limiting component; 42. Rotary drive assembly; 421. Rotary drive component; 422. Adapter component; 423. Bearing component; 43. Motion marking component; 50. Calibration component; 51. Step structure; 60. Connecting component; 70. Control components; 71. Operating unit. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] To address the problem of poor accuracy in height difference measurement results in existing technologies, this invention provides a height difference measurement device.

[0031] like Figures 1 to 7 The illustrated height difference measuring device includes a base 10, a stage 20, an image acquisition device 30, a stage driving device 40, and a calibration component 50. The stage 20 is movably mounted on the base 10. The image acquisition device 30 is vertically mounted above the stage 20 and is capable of acquiring the overall cloud point of the object to be measured on the stage 20. The stage driving device 40 is drivenly connected to the stage 20 and drives the stage 20 to move and / or rotate relative to the base 10. The calibration component 50 is mounted on the base 10 and has multiple calibration surfaces with predetermined height differences. The image acquisition device 30 acquires the overall cloud point of the multiple calibration surfaces and obtains the measured height difference. The image acquisition device 30 is adjusted according to the measured height difference and the predetermined height difference.

[0032] The embodiment adjusts the distance between the image acquisition device 30 and the object table 20 by adjusting the height of the image acquisition device 30 when measuring, so as to realize the adjustment of the height measurement range. The adjustment of the object table 20 can drive the adjustment of the object to be measured on the object table 20, so that the object to be measured is located in the measurement range of the image acquisition device 30, the blind area problem caused by triangulation is avoided to the greatest extent, and the accuracy and reliability of the measurement are ensured. The calibration piece 50 is arranged to be measured before the image acquisition device 30 measures the object to be measured. The measurement result of the image acquisition device 30 is compared with the standard distance on the calibration piece 50, so as to determine whether the measurement result of the image acquisition device 30 is accurate and reliable. The above arrangement can make the height difference measuring device measure different shapes and sizes of objects to be measured, so as to greatly improve the adaptability of the measurement, improve the universality, and improve the accuracy of the measurement, so as to ensure the accuracy and reliability of the measurement result of the image acquisition device 30.

[0033] The image acquisition device 30 of the embodiment adopts a 3D line laser camera. The 3D line laser camera can stably and accurately trigger measurement and obtain the overall point cloud of the measured object. The height difference measuring device of the embodiment is mainly suitable for discrete production processes, and can also be used in other production processes as needed.

[0034] As shown in Figure 1 In the embodiment, the base 10 includes a seat on the bottom and a column 11 on the top. The seat has a receiving cavity. The object table 20 is arranged above the seat, and the object driving device 40 is arranged in the receiving cavity, so that the object driving device 40 can drive the object table 20, and the seat can protect the object driving device 40.

[0035] As shown in Figure 2As shown, the height difference measuring device of the embodiment further comprises a connecting piece 60, which is longitudinally movably arranged on the stand 11, and the image collecting device 30 is arranged on the connecting piece 60, so that the image collecting device 30 can be synchronously moved up and down with the connecting piece 60, so as to change the height of the image collecting device 30 under the driving of the connecting piece 60, and realize the adjustment of the height. A height measuring scale can be arranged on the side of the stand 11, so that the height position of the image collecting device 30 can be conveniently judged, and the products with different height measuring requirements can be met. Meanwhile, the height difference measuring device can further comprise a lifting driving device, which is drivingly connected with the connecting piece 60, so as to drive the connecting piece 60 and the image collecting device 30 to move up and down. The lifting driving device can adopt various forms such as motor plus chain, as long as it can realize the driving connection with the connecting piece 60 and realize the driving of the connecting piece 60 to move up and down. In addition to the automatic lifting by the lifting driving device, the manual lifting mode can also be adopted.

[0036] The connecting piece 60 of the embodiment comprises a main connecting plate and a side plate, wherein the main connecting plate is arranged transversely and is connected with the stand 11, and a guide rail or the like structure can be arranged between the two to realize stable lifting movement; the image collecting device 30 is arranged on the bottom surface of the main connecting plate; the side plate is arranged longitudinally and is connected with the side surface of the main connecting plate and also connected with the image collecting device 30; the side plate is arranged on the opposite sides of the image collecting device 30, so as to realize the stable and reliable mounting and fixing of the image collecting device 30. Of course, the connecting piece 60 can also directly adopt other forms of structures such as a support, or the image collecting device 30 can be directly connected with the stand 11 together, as long as the reliable mounting and lifting of the image collecting device 30 can be realized.

[0037] As shown, Figure 3 In the embodiment, the calibration piece 50 has a stepped structure 51, which naturally forms a plurality of stepped surfaces with height differences, and the stepped surfaces can be used as calibration surfaces with predetermined height differences. In this way, the image collecting device 30 can obtain the height difference between two stepped surfaces by collecting and detecting the stepped surfaces on the calibration piece 50. Since the calibration piece 50 is a pre-set standard piece, the height difference between the stepped surfaces is known in advance. Therefore, the accuracy of the detection result of the image collecting device 30 at this time can be obtained by comparing the height difference detected by the image collecting device 30 with the known height difference, so as to judge the detection state of the image collecting device 30. When the detection result meets the requirements, the image collecting device 30 can be used to detect the measured object. If the detection result of the image collecting device 30 does not meet the requirements, the image collecting device 30 is adjusted first, and then the detection of the measured object is performed after the detection result of the image collecting device 30 meets the requirements. In this way, the accuracy and reliability of the detection result can be ensured, and a correct closed-loop verification process is formed.

[0038] The calibration piece 50 of the embodiment adopts a structure with a recessed middle part, and the recessed middle part forms stepped holes with gradually decreasing sizes, so that the calibration piece 50 forms a structure with multiple stepped layers. Of course, the specific structure of the calibration piece 50 can also be adjusted as needed, as long as a stepped structure 51 is formed.

[0039] Optionally, the number of the stepped structure 51 can also be adjusted, and one or more can be set. The embodiment preferably has multiple stepped structures 51 and forms at least three stepped surfaces. In this way, at least three calibration surfaces are formed, and the three calibration surfaces are matched in pairs to form two groups in an adjacent relationship. The image acquisition device 30 can measure the multiple groups of calibration surfaces respectively, so that multiple measurements are formed, and the accuracy of the detection result is further ensured.

[0040] Preferably, the height difference between the adjacent two calibration surfaces is 0.995-1.005 mm. This value can facilitate the measurement of the image acquisition device 30 and facilitate the judgment of the accuracy of the result. Of course, the height difference between the specific stepped surfaces can also be adjusted to other values as needed.

[0041] The storage table 20 of the embodiment adopts a setting mode of being rotatable and transversely movable, and based on this, Figure 6 as shown, the storage driving device 40 of the embodiment includes a moving driving assembly 41 and a rotating driving assembly 42, wherein at least a part of the moving driving assembly 41 is movably arranged relative to the base 10, the rotating driving assembly 42 is connected with the moving driving assembly 41 and moves under the driving of the moving driving assembly 41, and the rotating driving assembly 42 is drivingly connected with the storage table 20 and drives the storage table 20 to rotate. In this way, the moving driving assembly 41 can simultaneously drive the rotating driving assembly 42 and the storage table 20 to move transversely, so that the storage table 20 adjusts the transverse position, and the rotating driving assembly 42 can drive the storage table 20 to rotate, so that the storage table 20 can adjust the circumferential position thereof. Thus, the moving driving assembly 41 and the rotating driving assembly 42 cooperate to realize the transverse movement and rotation of the storage table 20, and further realize the adjustment of the transverse position and the circumferential position of the object to be measured on the storage table 20. In this way, for different shapes and sizes of the object to be measured, the adjustment of the object to be measured can be realized by adjusting the storage table 20, so that the position and state of the object to be measured can meet the acquisition and detection requirements of the image acquisition device 30, so that the image acquisition device 30 can acquire and detect the information of the object to be measured, so that the original detection blind area of the image acquisition device 30 becomes a measurable area, and the detection blind area is greatly reduced, so that the image acquisition device 30 can acquire and detect various objects to be measured, and the adaptability and universality are further improved.

[0042] as shown,Figure 4 As shown, the placement drive device 40 in this embodiment also includes a moving marker 43. The moving marker 43 can be fixedly installed in the base. The moving marker 43 has a marker for indicating the moving distance of the moving drive component 41. The moving marker 43 can cooperate with the placement platform 20 or the laterally moving part of the moving drive component 41. When the placement platform 20 moves laterally, the movement of the placement platform 20 can be determined by the moving marker 43, thereby ensuring the accuracy of the lateral movement of the placement platform 20, thus stably ensuring the accuracy of the overall scanning result of the image acquisition device 30, and reducing measurement errors caused by mechanical assembly, wear and tear and motor step loss.

[0043] In this embodiment, the movable marker 43 is a grating ruler, with its length direction parallel to the lateral movement direction of the platform 20. Correspondingly, this embodiment includes a reader for engaging with the movable marker 43. Considering the rotational movement of the platform 20, the reader is positioned on a laterally movable component of the movable drive assembly 41, specifically on the movable platform 411 (described laterally), rather than on the platform 20. This ensures that the rotation of the platform 20 does not affect the engagement between the reader and the grating ruler. When the movable platform 411 moves laterally, the reader engages with the grating ruler to read the movement status, providing a precise movement trigger signal and preventing issues such as lead screw backlash and motor step loss. Alternatively, besides using a reader, the movable marker 43 can also be a scale or similar structure, allowing for manual or lens-based numerical acquisition.

[0044] like Figure 4 As shown, in this embodiment, the moving drive assembly 41 includes a moving platform 411, a threaded screw 412, and a moving drive component 413. The moving platform 411 is laterally movably mounted on the base of the base 10. The rotating drive assembly 42 is mounted on the moving platform 411. The threaded screw 412 is threaded through the moving platform 411. A nut structure or a threaded through hole can be provided at the bottom center axis of the moving platform 411. The threaded screw 412 is threaded through the nut structure or the threaded through hole, thereby realizing the driving connection between the moving platform 411 and the moving platform 411. When the threaded screw 412 rotates, it can drive the moving platform 411 to move laterally. The moving drive component 413 can be a stepper motor or other components. The moving drive component 413 is connected to the threaded screw 412. In this way, the moving drive component 413 can drive the threaded screw 412 to rotate. The rotation of the threaded screw 412 can drive the moving table 411 to move through the threaded structure. The moving table 411 can then drive the rotary drive component 42 and the shelf 20 on it to move, thereby realizing the lateral movement of the shelf 20.

[0045] In order to ensure the stable and reliable movement of the mobile platform 411, the mobile driving assembly 41 of the embodiment further comprises a linear guide rail 414 and a tank chain 415, both of which are arranged between the mobile platform 411 and the base 10, thereby providing guiding and supporting effects for the movement of the mobile platform 411, and ensuring the stable and reliable lateral movement of the mobile platform 411. In addition, the mobile driving assembly 41 of the embodiment further comprises a limiting part 416, which can be a limiting switch or the like. The limiting part 416 can be arranged on the base 10 or the mobile platform 411, and is triggered when the mobile platform 411 moves to the limit position, so that the limiting part 416 controls the mobile driving part 413 to stop moving, thereby achieving the timely stop of the mobile platform 411 and avoiding the overtravel of the movement.

[0046] As shown in Figure 5 In the embodiment, the rotating driving assembly 42 comprises a rotating driving part 421 and an adapter 422. The rotating driving part 421 can be a motor or the like, and is connected with the mobile driving assembly 41, thereby being mounted and fixed on the mobile platform 411 of the mobile driving assembly 41, so as to be driven laterally by the mobile platform 411. The adapter 422 is arranged between the rotating driving part 421 and the object placing platform 20, and can be an adapter block or the like, thereby playing the role of adapter and speed reducer, so that the rotating driving part 421 can drive the object placing platform 20 to rotate around the longitudinal axis through the adapter 422, thereby achieving the circumferential rotation of the object placing platform 20.

[0047] In order to ensure the smooth rotation and carrying capacity of the object placing platform 20, the rotating driving assembly 42 of the embodiment further comprises a bearing part 423. In the embodiment, the bearing part 423 is a thrust ball bearing, which is arranged between the bottom of the object placing platform 20 and the base 10. The output shaft of the rotating driving part 421 and the adapter 422 are both arranged in the center hole of the thrust ball bearing, so that the bearing part 423 can play the roles of supporting and lubricating rotation at the same time, thereby ensuring the smooth rotation of the object placing platform 20, and making the bottom of the object placing platform 20 not only supported by the adapter 422, but also supported by the bearing part 423, thereby greatly improving the carrying capacity.

[0048] Considering that the rotating driving part 421 has a certain distance in the axial direction, the base 10 of the embodiment further comprises a bearing support 16, which is arranged at the lateral position of the rotating driving part 421 and below the object placing platform 20, and there is a space between the bearing support 16 and the object placing platform 20, in which the bearing part 423 is arranged, so that the bearing part 423 can stably support the object placing platform 20 and ensure the supporting effect.

[0049] It should be noted that the specific structure of the storage driving device 40 and the specific structure of the moving driving assembly 41 and the rotating driving assembly 42 thereof can adopt other structure forms. For example, the storage driving device 40 still includes the moving driving assembly 41 and the rotating driving assembly 42, but the rotating driving assembly 42 is arranged on the moving driving assembly 41, the rotating driving assembly 42 simultaneously drives the moving driving assembly 41 and the storage table 20 to rotate, and the moving driving assembly 41 only drives the storage table 20 to move; or the moving driving assembly 41 can adopt a gear and rack cooperation mode to realize the movement of the moving table 411; or the rotating driving assembly 42 can adopt a structure form of a cylinder cooperating with a crank slider.

[0050] As shown in Figure 6 , the moving driving assembly 41 and the rotating driving assembly 42 of the embodiment are arranged in the seat table of the base 10, only a small part of the adapter 422 is exposed to facilitate connection between the storage table 20. In this way, the protection of the storage driving device 40 can be realized. At the same time, the accommodation cavity of the seat table is divided into multiple parts in the embodiment, specifically, the seat table of the base 10 has a first cavity 12 and a second cavity 13, the first cavity 12 and the second cavity 13 jointly form an accommodation cavity, and the first cavity 12 and the second cavity 13 are separately arranged. The height difference measuring device further includes control components 70, which can include air switches, power supplies, motor drivers, camera drivers, industrial computers, wire slots, air valves, relay switches and other components. The storage driving device 40 is arranged in the first cavity 12, and the control components 70 are arranged in the second cavity 13 and electrically connected with the image acquisition device 30 and the storage driving device 40. In this way, the storage driving device 40 for driving transmission and the control components 70 for electrical control are separated, and are only electrically connected through wires. On the one hand, integrated arrangement is beneficial to size reduction and compact structure, and on the other hand, it is convenient for later maintenance and other operations.

[0051] As shown in Figure 7 , in addition to the above-mentioned components, the control components 70 of the embodiment can also include an operation part 71, which can include an emergency stop switch, a touch display and other components. The operation part 71 is mainly used for personnel operation, control, state indication and the like. The operation part 71 is arranged on the side surface of the seat table and exposed to the accommodation cavity, so as to realize the control of the whole device by the personnel. The operation part 71 of the embodiment only includes an emergency stop switch and a touch display, so that the interaction way is only the touch screen and the emergency stop switch. During normal measurement, the personnel can start execution and display results through the touch display, so that the personnel can quickly start and use simply. Of course, the specific components of the operation part 71 can also be adjusted as needed.

[0052] As shown in Figure 6As shown, in this embodiment, the first cavity 12 and the second cavity 13 are arranged in a vertically layered manner. Considering that the placement driving device 40 in the first cavity 12 needs to cooperate with the placement platform 20 above the base, this embodiment places the first cavity 12 above the second cavity 13, thus forming a configuration from top to bottom of first cavity 12 and second cavity 13. This ensures both protection of the components within the cavity and facilitates wiring of the components within the first cavity 12 and second cavity 13, improving convenience.

[0053] The base 10 in this embodiment also has a sliding member 14. The sliding member 14 is retractable and extendable and is disposed on the side of the base. In this embodiment, the sliding member 14 is disposed at the bottom of the base 10. The sliding member 14 can adopt the structure of a drawer bottom plate. The second cavity 13 is located above the sliding member 14. At least a portion of the control components 70 is disposed on the sliding member 14, so that the sliding member 14 can be used to install the aforementioned at least a portion of the control components 70. Since a slide rail or other structure is provided between the sliding member 14 and the inner wall of the base, the sliding member 14 can be slid out laterally relative to the base. This allows for inspection and maintenance of the internal control components 70, facilitating subsequent maintenance operations.

[0054] like Figure 7 As shown, in addition to the sliding member 14, an openable front panel 15 can also be provided on the side of the base. The front panel 15 can rotate laterally with respect to the base, thereby allowing the second cavity 13 to be opened for maintenance of its internal components. In this embodiment, components for human operation, such as the emergency stop switch and touch display, can be located on the front side of the front panel 15 for easy operation. Locks or other components can also be provided between the front panel 15 and the base to prevent the front panel 15 from being opened arbitrarily during normal use, ensuring safety in daily use.

[0055] It should be noted that "multiple" in the above embodiments refers to at least two.

[0056] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0057] 1. This solves the problem of poor accuracy in height difference measurement results in existing technologies;

[0058] 2. The height difference measuring device can measure objects of different shapes and sizes, thus greatly improving the range of applicability and versatility of the measurement.

[0059] 3. Improved measurement accuracy, ensuring that the results obtained from image acquisition and measurement by the image acquisition device are accurate and reliable;

[0060] 4. The whole structure is simple, and convenient for operation and later maintenance.

[0061] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0062] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", and the like, used in the specification and the claims of the present application are intended to distinguish analogous objects, and do not have to be used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged, where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0064] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A height difference measuring apparatus characterized by comprising: The height difference measuring device comprises: a base (10); a placing table (20) movably arranged on the base (10); an image collecting device (30) arranged above the placing table (20) and capable of collecting the whole cloud point of an object to be measured on the placing table (20); a placing driving device (40) drivingly connected with the placing table (20) and driving the placing table (20) to move and / or rotate relative to the base (10); a calibration member (50) arranged on the base (10), the calibration member (50) having a plurality of calibration surfaces with predetermined height differences, the image collecting device (30) collecting the whole cloud point of the plurality of calibration surfaces and obtaining a measured height difference, and the image collecting device (30) being adjusted according to the measured height difference and the predetermined height difference.

2. The height difference measuring apparatus according to claim 1, characterized by The base (10) has a stand column (11), and the height difference measuring device further comprises a connecting member (60) longitudinally movably arranged on the stand column (11), and the image collecting device (30) is arranged on the connecting member (60) and moves up and down synchronously with the connecting member (60) to change the height of the image collecting device (30).

3. The height difference measuring apparatus according to claim 1, characterized by The calibration member (50) has a stepped structure (51), and the stepped surfaces of the stepped structure (51) are the calibration surfaces with predetermined height differences, and the height difference between two adjacent calibration surfaces is 0.995-1.005 mm.

4. The height difference measuring apparatus according to claim 3, characterized by The stepped structure (51) is a plurality of stepped structures, and at least three stepped surfaces are formed.

5. The height difference measuring apparatus according to claim 1, characterized by The placing driving device (40) comprises: a moving driving assembly (41), at least a part of the moving driving assembly (41) being movably arranged relative to the base (10); a rotating driving assembly (42) connected with the moving driving assembly (41) and moving under the driving of the moving driving assembly (41), the rotating driving assembly (42) being drivingly connected with the placing table (20) and driving the placing table (20) to rotate; a moving identification member (43) having an identification for indicating the moving distance of the moving driving assembly (41).

6. The height difference measuring apparatus according to claim 5, characterized by The moving driving assembly (41) comprises: a moving table (411) transversely movably arranged on the base (10), the rotating driving assembly (42) being arranged on the moving table (411), and the moving table (411) having a reading head for cooperating with the moving identification member (43); a threaded lead screw (412) threadedly penetrating through the moving table (411), the threaded lead screw (412) driving the moving table (411) to move transversely when rotating; a moving driving member (413) drivingly connected with the threaded lead screw (412) and driving the threaded lead screw (412) to rotate.

7. The height difference measuring apparatus according to claim 5, wherein The rotating driving assembly (42) comprises: A rotating driving member (421) is connected with the moving driving assembly (41) and moves laterally under the driving of the moving driving assembly (41); An adapter (422) is arranged between the rotating driving member (421) and the object table (20), and the rotating driving member (421) drives the object table (20) to rotate around the longitudinal axis through the adapter (422); A bearing member (423) is arranged between the object table (20) and the base (10).

8. The height difference measuring apparatus according to claim 1, characterized by The base (10) has a first cavity (12) and a second cavity (13), the object driving device (40) is arranged in the first cavity (12), the height difference measuring apparatus further comprises a control element (70) arranged in the second cavity (13) and electrically connected with the image acquisition device (30) and the object driving device (40), and the control element (70) has an operation part (71) exposed to the base (10) and used for operation.

9. The height difference measuring apparatus according to claim 8, characterized by The first cavity (12) and the second cavity (13) are arranged in layers from top to bottom, and the first cavity (12) is above the second cavity (13).

10. The height difference measuring apparatus according to claim 8, characterized by The base (10) has a sliding member (14) which is arranged in a pullable and extendable manner, and at least a part of the control element (70) is arranged on the sliding member (14).

Images