Adaptive closed loop force controlled dimension measuring device
By using an adaptive closed-loop force control device and multi-point measurement technology, the problem of inaccurate pressure control in measuring soft workpieces was solved, and accurate measurement of soft workpieces was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU XIANGTIAN INTELLIGENT TECH CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-19
AI Technical Summary
Existing measuring devices cannot effectively control the pressure applied to soft workpieces, resulting in inaccurate measurement results, and non-parallel clamping leads to single-point measurement errors.
An adaptive closed-loop force control device is adopted, which ensures that the force is consistent when the pressing plate contacts the workpiece through the driving component, push plate, pressure sensor and adjustment mechanism, and uses multiple distance measuring instruments to measure the size at different points to calculate accurate results.
Consistent pressure control was achieved during the measurement of soft workpieces, ensuring the accuracy of measurement results and the precision of multi-point measurements, and avoiding single-point measurement errors.
Smart Images
Figure CN224382398U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of measuring equipment technology, specifically relating to an adaptive closed-loop force-controlled dimension measuring device. Background Technology
[0002] In the context of measuring the dimensions of soft workpieces, due to the characteristics of soft workpieces, different forces applied to the workpiece by the measuring device result in different measured dimensions. Therefore, it is necessary to control the measuring pressure during measurement to obtain a constant pressure for measuring the dimensions of soft workpieces. Current measuring devices extend to contact the soft workpiece via an extension mechanism, and a displacement sensor measures the workpiece's dimensions. However, because the pressure applied by the extension mechanism to the soft workpiece cannot be well controlled, the pressure applied by the extension mechanism is inconsistent, ultimately leading to inaccurate dimensional measurements for this type of soft workpiece. Furthermore, the non-parallelism between the two plates holding the soft workpiece and the measurement of only one point on the workpiece often result in inaccurate dimensional measurements. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides an adaptive closed-loop force-controlled dimension measuring device. The technical problem to be solved by this utility model is: how to ensure accurate dimension measurement of soft workpieces.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] An adaptive closed-loop force-controlled dimensional measurement device, comprising:
[0006] An installation platform, wherein a portal frame is provided on the installation platform;
[0007] The lowering mechanism includes a driving component, a push plate, a pressure sensor, and a pressing plate; the driving component is mounted on the gantry frame, the push plate is mounted on the output end of the driving component, the pressure sensor is mounted on the side of the push plate away from the driving component, and the pressing plate is mounted on the side of the pressure sensor away from the push plate.
[0008] An adjustment mechanism includes a support member, an adjustment plate, and two adjustment components. One end of the support member is mounted on the mounting platform, and the other end of the support member is hinged to the bottom of the adjustment plate. The adjustment plate and the pressing plate can clamp a soft workpiece to be measured. The two adjustment components are mounted on the mounting platform and are used to adjust the height of one or both sides of the adjustment plate, respectively.
[0009] A distance measuring mechanism, comprising multiple distance measuring instruments mounted on an adjustment plate, wherein the connecting lines of the multiple distance measuring instruments are not on the same straight line.
[0010] In the aforementioned adaptive closed-loop force-controlled dimensional measuring device, the driving component includes a first motor module, a guide seat, and a guide rod. The first motor module is mounted on the gantry frame, the push plate is mounted on the output end of the first motor module, the guide seat is mounted on the first motor module, and one end of the guide rod passes through the guide seat and extends to the outside of the guide seat to connect with the push plate.
[0011] In the aforementioned adaptive closed-loop force-controlled dimension measuring device, the support member includes a support block and a first hinge joint. One end of the support block is fixedly connected to the mounting platform, and the other end of the support block is provided with the first hinge joint, which is connected to the bottom of the adjusting plate.
[0012] In the aforementioned adaptive closed-loop force-controlled dimension measuring device, the first hinge joint is a fisheye joint, and the first hinge joint is connected to the bottom center position of the adjustment plate.
[0013] In the aforementioned adaptive closed-loop force control dimension measuring device, the adjustment component includes a second motor module and a second hinge joint. The second motor module is mounted on the mounting platform, the second hinge joint is mounted on the output end of the second motor module, and the second hinge joint is connected to the bottom of the side of the adjustment plate.
[0014] In the aforementioned adaptive closed-loop force-controlled dimension measuring device, the second hinge joint is a fisheye joint, and the second hinge joints of the two adjustment components are respectively connected to the bottom center of the two sides of the adjustment plate.
[0015] In the aforementioned adaptive closed-loop force control dimension measuring device, the distance measuring mechanism includes three distance measuring instruments, which are respectively installed on different sides of the adjustment plate.
[0016] In the aforementioned adaptive closed-loop force-controlled dimension measuring device, the lines connecting the three distance measuring instruments are not on the same straight line.
[0017] In the aforementioned adaptive closed-loop force-controlled dimension measuring device, the adaptive closed-loop force-controlled dimension measuring device further includes a transverse movement mechanism, which includes a linear module and a mounting plate; the linear module is mounted on the mounting platform, the mounting plate is mounted on the output end of the linear module, and the adjustment mechanism is mounted on the mounting plate.
[0018] The beneficial effects of this utility model are:
[0019] This invention's adaptive closed-loop force-controlled dimensional measuring device ensures that the force applied by the pressing plate to the soft workpiece remains consistent when measuring similar soft workpieces, achieving adaptive closed-loop force control and avoiding inconsistent forces applied to the soft workpiece, thus guaranteeing accurate dimensional measurement. Furthermore, by measuring the dimensions of different points on the soft workpiece using multiple distance measuring instruments and calculating the dimensions of the soft workpiece, the accuracy of the dimensional measurement is ensured. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the adaptive closed-loop force control size device;
[0021] Figure 2 Another structural schematic diagram of the adaptive closed-loop force control size device;
[0022] Figure 3 This is a schematic diagram of the downward moving mechanism;
[0023] Figure 4 This is a schematic diagram of the structure when the adjustment mechanism is mounted on the mounting plate.
[0024] Figure 5 This is a structural schematic diagram from another perspective when the adjustment mechanism is mounted on the mounting plate.
[0025] In the diagram, 1. Mounting platform; 11. Gantry frame; 2. Lowering mechanism; 21. Driving component; 211. First motor module; 212. Guide seat; 213. Guide rod; 22. Push plate; 23. Pressure sensor; 24. Pressing plate; 3. Adjustment mechanism; 31. Support component; 311. Support block; 312. First hinge joint; 32. Adjustment plate; 34. Adjustment assembly; 341. Second motor module; 342. Second hinge joint; 4. Distance measuring mechanism; 41. Distance measuring instrument; 5. Lateral movement mechanism; 51. Linear module; 52. Mounting plate. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0028] Example 1:
[0029] like Figure 1-5 As shown, this embodiment provides an adaptive closed-loop force-controlled dimensional measuring device, including a mounting platform 1, a lowering mechanism 2, an adjusting mechanism 3, and a distance measuring mechanism 4; a gantry frame 11 is provided on the mounting platform 1; the lowering mechanism 2 includes a driving component 21, a pushing plate 22, a pressure sensor 23, and a pressing plate 24; the driving component 21 is mounted on the gantry frame 11, the pushing plate 22 is mounted on the output end of the driving component 21, the pressure sensor 23 is mounted on the side of the pushing plate 22 away from the first driving component 21, and the pressing plate 24 is mounted on the side of the pressure sensor 23 away from the pushing plate 22; the adjusting mechanism 3... Mechanism 3 includes a support member 31, an adjusting plate 32, and two adjusting components 34; one end of the support member 31 is mounted on the mounting platform 1, and the other end of the support member 31 is hinged to the bottom of the adjusting plate 32. The adjusting plate 32 and the pressing plate 24 can clamp the soft workpiece to be measured; the two adjusting components 34 are mounted on the mounting platform 1, and the two adjusting components 34 are used to adjust the height of one or both sides of the adjusting plate 32 respectively; the distance measuring mechanism 4 includes multiple distance measuring instruments 41, which are mounted on the adjusting plate 32, and the lines connecting the multiple distance measuring instruments 41 are not on the same straight line.
[0030] In this embodiment, a portal frame 11 is provided on the mounting platform 1. The portal frame 11 facilitates the installation of the lowering mechanism 2, so that the lowering mechanism 2 and the adjusting mechanism 3 are arranged opposite to each other. The driving member 21 is installed on the portal frame 11, the push plate 22 is installed on the output end of the driving member 21, the pressure sensor 23 is installed on the side of the push plate 22 away from the driving member 21, and the pressing plate 24 is installed on the side of the pressure sensor 23 away from the push plate 22. The driving member 21 can provide power to drive the push plate 22 to move downward, thereby pushing the pressing plate 24 to move downward. One end of the support member 31 is installed on the mounting platform 1, and the other end of the support member 31 is hinged to the bottom of the adjusting plate 32. Specifically, the other end of the support member 31 is hinged to the center of the bottom of the adjusting plate 32, so that the adjusting plate 32 can rotate around the first support member 31. The pressing plate 24 and the adjusting plate 32 are arranged opposite to each other, and the center of the pressing plate 24 and the center of the adjusting plate 32 are on the same vertical line. Two adjustment groups The component 34 is used to adjust the height of one or both sides of the adjustment plate 32 to ensure that the adjustment plate 32 and the pressing plate 24 are horizontal, thus ensuring the accuracy of measuring soft workpieces. When it is necessary to measure a soft workpiece, the adjustment plate 32 is first adjusted horizontally through the two adjustment groups to ensure that the adjustment plate 32 and the pressing plate 24 are parallel. The soft workpiece is placed on the adjustment plate 32, and the driving component 21 drives the pressing plate 24 to move downward. The pressing plate 24 and the adjustment plate 32 clamp the workpiece to be tested. At this time, the value of the force sensor is F, that is, the force applied by the pressing plate 24 to the soft workpiece is F. The size of the soft workpiece is measured at different points by multiple distance measuring instruments 41, and then the size of the soft workpiece can be obtained by calculation. When measuring the same type of soft workpiece, it is ensured that the force F applied by the pressing plate 24 to the soft workpiece is consistent, realizing adaptive closed-loop force control, avoiding different forces applied to the soft workpiece, and thus ensuring the accuracy of soft workpiece size measurement. As one embodiment, the pressing plate 24 and the adjusting plate 32 are made of marble slabs, which can ensure the flatness of the surfaces of the pressing plate 24 and the adjusting plate 32, and ensure more accurate measurement.
[0031] like Figure 3 As shown, the driving component 21 includes a first motor module 211, a guide seat 212, and a guide rod 213. The first motor module 211 is mounted on the gantry frame 11. The push plate 22 is mounted on the output end of the first motor module 211. The guide seat 212 is mounted on the first motor module 211. One end of the guide rod 213 passes through the guide seat 212 and extends to the outside of the guide seat 212 to connect with the push plate 22.
[0032] In this embodiment, the first motor module 211 is mounted on the gantry frame 11. The first motor module 211 can output linear motion. The push plate 22 is mounted on the output end of the first motor module 211. The first motor module 211 can drive the push plate 22 to move downward, thereby driving the pressing plate 24 to move downward. The guide seat 212 is mounted on the first motor module 211. One end of the guide rod 213 passes through the guide seat 212 and extends to the outside of the guide seat 212 to connect with the push plate 22. Through the guide rod 213 and the guide seat 212, it is ensured that the first motor module 211 drives the first push plate 22 more smoothly.
[0033] like Figure 4 and 5 As shown, the support member 31 includes a support block 311 and a first hinge joint 312. One end of the support block 311 is fixedly connected to the mounting platform 1, and the other end of the support block 311 is provided with the first hinge joint 312, which is connected to the bottom of the adjusting plate 32. The first hinge joint 312 is a fisheye joint, and it is connected to the center position of the bottom of the adjusting plate 32.
[0034] In this embodiment, one end of the support block 311 is fixedly connected to the mounting platform 1, and the other end of the support block 311 is provided with a first hinge joint 312. The first hinge joint 312 is connected to the bottom of the adjusting plate 32, specifically, the first hinge joint 312 is connected to the center of the bottom of the adjusting plate 32, so that the adjusting plate 32 can rotate around the first hinge joint 312. As one embodiment, the first hinge joint 312 is a fisheye joint, but other types of hinge joints can also be used, which are not limited here.
[0035] like Figure 4 and 5 As shown, the adjustment assembly 34 includes a second motor module 341 and a second hinge joint 342. The second motor module 341 is mounted on the mounting platform 1, and the second hinge joint 342 is mounted on the output end of the second motor module 341. The second hinge joint 342 is connected to the bottom of the side of the adjustment plate 32. The second hinge joint 342 is a fisheye connector, and the second hinge joints 342 of the two adjustment assemblies 34 are respectively connected to the bottom center of the two sides of the adjustment plate 32.
[0036] In this embodiment, the second motor module 341 is mounted on the mounting platform 1. The second motor module 341 can output linear motion. The second hinge joint 342 is mounted on the output end of the second motor module 341, meaning that the first motor module 211 can drive the second hinge joint 342 to move up and down. The second hinge joint 342 is connected to the bottom of the side of the adjusting plate 32. The second hinge joint 342 drives the side plate of the adjusting plate 32 to move up and down, thereby realizing the adjustment of the adjusting plate 32, ensuring that the adjusting plate 32 and the pressing plate 24 are parallel, and ensuring accurate dimensions when measuring soft workpieces. As one embodiment, the second hinge joint 342 is a fisheye joint, but other types of hinge joints can also be used, and this is not limited here.
[0037] like Figure 1 , 4 As shown in Figure 5, the distance measuring mechanism 4 includes three distance measuring instruments 41, which are respectively mounted on different sides of the adjusting plate 32. The lines connecting the three distance measuring instruments 41 are not on the same straight line.
[0038] In this embodiment, three distance measuring instruments 41 are respectively installed on different sides of the adjusting plate 32. The distance measuring instruments 41 can measure the size of the soft workpiece between the adjusting plate 32 and the pressing plate 24. The three distance measuring instruments 41 measure the distance between the adjusting plate 32 and the pressing plate 24 at three points respectively. Then, the adjusting plate 32 is adjusted by two sets of adjusting components 34 to make the values of the three distance measuring instruments 41 equal or close. Within the measurement accuracy range set by the user, the average value of the three distance measuring instruments 41 is the size of the soft workpiece, thus ensuring accurate measurement of the size of the soft workpiece. As one embodiment, the distance measuring instrument 41 can be a laser displacement sensor, grating, or distance sensor, etc., capable of measuring the distance between two points.
[0039] like Figure 1 and 2 As shown, the adaptive closed-loop force control dimension measuring device further includes a transverse movement mechanism 5, which includes a linear module 51 and a mounting plate 52; the linear module 51 is mounted on the mounting platform 1, the mounting plate 52 is mounted on the output end of the linear module 51, and the adjustment mechanism 3 is mounted on the mounting plate 52.
[0040] In this embodiment, the linear module 51 is installed on the mounting platform 1, the mounting plate 52 is installed on the output end of the linear module 51, and the adjustment mechanism 3 is installed on the mounting plate 52. The linear module 51 can drive the adjustment component 34 to move so that the adjustment plate 32 and the pressing plate 24 are set relative to each other, ensuring that the soft workpiece is pressed between the adjustment plate 32 and the pressing plate 24, thus ensuring accurate measurement of the soft workpiece dimensions.
[0041] Example 2:
[0042] This embodiment provides a measurement method using the aforementioned adaptive closed-loop force-controlled dimensional measuring device. The measurement method includes the following steps:
[0043] S1. Align the centers of the adjusting plate 32 and the pressing plate 24. Specifically, drive the adjusting plate 32 through the linear module 51 to align the centers of the adjusting plate 32 and the pressing plate 24, so that the adjusting plate 32 and the pressing plate 24 can clamp the soft workpiece between the adjusting plate 32 and the pressing plate 24, and ensure accurate measurement of the soft workpiece.
[0044] S2. The first motor module 211 drives the pressing plate 24 to move towards the adjusting plate 32 until the pressing plate 24 and the adjusting plate 32 are pressed tightly together, and the values of the three distance measuring instruments 41 are zeroed. After the centers of the adjusting plate 32 and the pressing plate 24 are aligned, the first motor module 211 drives the pressing plate 24 to move towards the adjusting plate 32 until the pressing plate 24 and the adjusting plate 32 are pressed tightly together. At this time, the values of the three distance measuring instruments 41 are zeroed. This allows the distance measuring instruments 41 to be calibrated to ensure that when the adjusting plate 32 and the pressing plate 24 press the soft workpiece, the distance measuring instruments 41 can accurately measure the distance between the adjusting plate 32 and the pressing plate 24, which is the contact distance of the soft workpiece.
[0045] S3. After the values of the three distance measuring instruments 41 are zeroed, the first drive motor module drives the pressing plate 24 to move away from the adjusting plate 32, and places the soft workpiece to be tested on the adjusting plate 32. After the values of the three distance measuring instruments 41 are zeroed, the soft workpiece to be tested is placed on the adjusting plate 32, and then the size of the soft workpiece is measured.
[0046] S4. The first drive motor module drives the pressing plate 24 toward the soft workpiece to be inspected until it is in contact with the workpiece. The values J1, J2, and J3 measured by the three distance measuring instruments 41, and the value F from the force sensor are read. The two second motor modules 341 are adjusted so that the values of J1, J2, and J3 are close to or equal. The thickness D of the soft workpiece to be inspected is calculated as D = (J1, J2, and J3) / 3. When measuring the dimensions of the soft workpiece, the first drive motor module drives the pressing plate 24. Oriented towards the soft workpiece to be inspected, the soft workpiece is pressed between the adjusting plate 32 and the pressing plate 24. The values measured by the three distance measuring instruments 41 are J1, J2 and J3. Then, by adjusting the two second motor modules 341, the values of J1, J2 and J3 are made close to or equal. When the values of J1, J2 and J3 are close, it is within the measurement accuracy allowed by the user. By calculation, the thickness of the soft workpiece to be inspected, D = (J1, J2 and J3) / 3, can be obtained.
[0047] S5. Repeat the above steps, keeping the force sensor value F the same, to measure different soft workpieces and determine their dimensions. When measuring soft workpieces of the same type, the first drive motor module drives the pressing plate 24 to move towards the soft workpiece to be tested. When the pressing plate 24 is in contact with the soft workpiece to be tested, the force sensor value F remains the same, achieving adaptive closed-loop force control. This ensures that the pressure on soft workpieces of the same type is the same, thereby ensuring the accuracy of the measured dimensions of the soft workpieces.
[0048] In this embodiment, the measurement method involves pressing the pressing plate 24 and the adjusting plate 32 together, zeroing the values of the three distance measuring instruments 41, calibrating the distance measuring instruments, and then calculating the thickness D of the soft workpiece D = (J1, J2 and J3) / 3 by measuring the values J1, J2 and J3 at different points of the soft workpiece using the three distance measuring instruments 41, thus ensuring the accuracy of the measured dimensions of the soft workpiece.
[0049] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. An adaptive closed loop force controlled sizing device, characterized by, include: Mounting platform (1), on which a portal frame (11) is provided; The lowering mechanism (2) includes a driving member (21), a push plate (22), a pressure sensor (23), and a pressing plate (24); the driving member (21) is mounted on the gantry frame (11), the push plate (22) is mounted on the output end of the driving member (21), the pressure sensor (23) is mounted on the side of the push plate (22) away from the driving member (21), and the pressing plate (24) is mounted on the side of the pressure sensor (23) away from the push plate (22); The adjustment mechanism (3) includes a support member (31), an adjustment plate (32), and two adjustment components (34). One end of the support member (31) is mounted on the mounting platform (1), and the other end of the support member (31) is hinged to the bottom of the adjustment plate (32). The adjustment plate (32) and the pressing plate (24) can clamp the soft workpiece to be measured. The two adjustment components (34) are mounted on the mounting platform (1) and are used to adjust the height of one or both sides of the adjustment plate (32) respectively. The distance measuring mechanism (4) includes multiple distance measuring instruments (41), which are mounted on the adjustment plate (32). The lines connecting the multiple distance measuring instruments (41) are not on the same straight line.
2. The self-adapting closed-loop force-controlled sizing device of claim 1, wherein, The driving component (21) includes a first motor module (211), a guide seat (212), and a guide rod (213). The first motor module (211) is mounted on the gantry frame (11). The push plate (22) is mounted on the output end of the first motor module (211). The guide seat (212) is mounted on the first motor module (211). One end of the guide rod (213) passes through the guide seat (212) and extends to the outside of the guide seat (212) to connect with the push plate (22).
3. The self-adapting closed loop force controlled sizing device of claim 1, wherein, The support member (31) includes a support block (311) and a first hinge joint (312). One end of the support block (311) is fixedly connected to the mounting platform (1), and the other end of the support block (311) is provided with the first hinge joint (312). The first hinge joint (312) is connected to the bottom of the adjusting plate (32).
4. The self-adapting closed loop force controlled sizing device of claim 3, wherein, The first hinge joint (312) is a fisheye joint, and the first hinge joint (312) is connected to the bottom center position of the adjustment plate (32).
5. The self-adapting closed loop force controlled sizing device of claim 1, wherein, The adjustment assembly (34) includes a second motor module (341) and a second hinge joint (342). The second motor module (341) is mounted on the mounting platform (1), and the second hinge joint (342) is mounted on the output end of the second motor module (341). The second hinge joint (342) is connected to the bottom of the side of the adjustment plate (32).
6. The self-adapting closed loop force controlled sizing device of claim 5, wherein, The second hinge joint (342) is a fisheye joint, and the second hinge joints (342) of the two adjustment components (34) are respectively connected to the bottom center of the two sides of the adjustment plate (32).
7. The self-adapting closed loop force controlled sizing device of claim 1, wherein, The distance measuring mechanism (4) includes three distance measuring instruments (41), which are respectively installed on different sides of the adjusting plate (32).
8. The self-adapting closed loop force controlled sizing device of claim 7, wherein, The lines connecting the three distance measuring instruments (41) are not on the same straight line.
9. The self-adapting closed loop force controlled sizing device according to any of claims 1-8, wherein, The adaptive closed-loop force control dimension measuring device further includes a transverse movement mechanism (5), which includes a linear module (51) and a mounting plate (52); the linear module (51) is mounted on the mounting platform (1), the mounting plate (52) is mounted on the output end of the linear module (51), and the adjustment mechanism (3) is mounted on the mounting plate (52).