Calibration device of plantar sensor
By designing a calibration device including a linear module and a detection component, the problem of difficulty in accurately calibrating the local pressure sensing points of the sole sensor in the prior art is solved, and a high-precision calibration effect is achieved.
Patent Information
- Application Number
- CN202411875313.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-03-28
AI Technical Summary
The prior art is difficult to accurately calibrate the local pressure sensing points of the sole pressure sensor.
A calibration device including a plurality of linear modules and detection components is designed, through which the position of the compressor is adjusted to correspond to the position to be measured of the sole sensor, and calibrated by the standard sensor and the compressor of the detection component.
Accurate detection and calibration of local pressure sensing points of the sole foot sensor is achieved, improving the accuracy and efficiency of calibration.
Smart Images
Figure CN119700079A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pressure measurement, and in particular to a calibration device for a plantar sensor. Background Art
[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. Pressure sensors are commonly used in plantar pressure scanning equipment and gait detection devices.
[0003] The plantar pressure sensor is a sensor used to measure and record the pressure distribution of the sole of the foot. It is widely used in many fields such as medicine, sports, shoe design, rehabilitation therapy, etc. The plantar pressure sensor usually adopts a sheet-like planar structure with multiple pressure sensing points arranged in the planar structure, which can cover the entire sole of the foot and collect the pressure distribution of various parts of the sole of the foot.
[0004] Since the plantar pressure sensor has a large area, a flat plate simulation method is usually used for detection when calibrating the plantar pressure sensor. It is necessary to press a flat plate on the pressure sensor and read the reading on the pressure sensor. At the same time, the data of all pressure sensing points within the flat plate area are read, which makes it difficult to accurately calibrate local pressure sensing points. Summary of the invention
[0005] In view of the above technical problems existing in the prior art, the present invention provides a calibration device for a plantar sensor to detect and calibrate the local pressure sensing points of the plantar sensor.
[0006] The present invention discloses a calibration device for a plantar sensor, comprising a plurality of linear modules and a detection component; the linear modules comprise a first linear module, a second linear module and a third linear module, the second linear module is mounted at the output end of the first linear module, the third linear module is longitudinally arranged at the output end of the second linear module, and the detection component is arranged at the output end of the third linear module; the detection component comprises a standard sensor and a pressure block mounted at the lower side of the standard sensor, the lower end of the pressure block is provided with a pressing portion cooperating with the plantar sensor.
[0007] Preferably, the detection assembly further comprises at least one first mounting boss, and the first standard sensor is mounted on the lower side of the first mounting boss; and the connecting portion at one end of the first pressing block is detachably mounted on the lower side of the first standard sensor.
[0008] Preferably, the detection assembly further includes a third connecting member and a third mounting plate.
[0009] The third connecting member is installed at the output end of the third linear module;
[0010] The third mounting plate is longitudinally mounted on the third connecting member;
[0011] The first mounting boss is mounted on the lower end of the third mounting plate.
[0012] Preferably, the present invention further comprises a fourth linear module mounted on the third connecting member, and a fourth mounting plate is provided at the output end of the fourth linear module;
[0013] At least one second mounting boss is disposed at the lower end of the fourth mounting plate; a detachable second standard sensor is disposed on the second mounting boss.
[0014] Preferably, the pressing area of the second pressing block at the lower side of the second standard sensor is smaller than the pressing area of the first pressing block at the lower side of the first standard sensor;
[0015] The measuring range of the second standard sensor is smaller than the measuring range of the first standard sensor.
[0016] Preferably, the present invention further comprises a loading platform arranged at the lower side of the first linear module, and the plantar sensor is arranged at the upper side of the loading platform.
[0017] Preferably, a slide rail is provided on one side of the first linear module.
[0018] One end of the second linear module is slidably mounted on the slide rail.
[0019] Preferably, the linear module comprises a bracket, a driving mechanism, a lead screw and a nut matched with the lead screw;
[0020] The lead screw is rotatably mounted in the bracket, and the driving mechanism is connected to the lead screw.
[0021] Preferably, the driving mechanism comprises a servo motor or an eccentric handle;
[0022] The output shaft of the driving mechanism is connected to the lead screw via a coupling;
[0023] A sliding block is installed on the outer side of the nut.
[0024] Preferably, the operating method of the calibration device includes:
[0025] Place the plantar sensor on the stage;
[0026] If the measuring range of the first standard sensor and the pressing area of the first pressing block below it match the position to be measured;
[0027] The position of the pressing block is adjusted by the first linear module and the second linear module so that the pressing block corresponds to the position to be measured of the plantar sensor; the first pressing block is controlled to descend and press on the position to be measured by the third linear module; the plantar sensor is calibrated by the detection values of the first standard sensor and the plantar sensor;
[0028] If the measuring range of the second standard sensor and the pressing area of the pressing block at its lower side match the position to be measured;
[0029] The first pressure block is controlled to be higher than the worktable through the third linear module; the position of the second pressure block is adjusted through the first linear module and the second linear module so that the second pressure block corresponds to the position to be measured of the plantar sensor; the second pressure block is controlled to descend and pressed at the position to be measured through the fourth linear module; the plantar sensor is calibrated through the detection values of the second standard sensor and the plantar sensor.
[0030] Compared with the prior art, the beneficial effects of the present invention are: the horizontal position of the pressing block is adjusted by the first linear module and the second super module, the longitudinal position is adjusted by the third linear module, and pressure is provided to the pressing block and the plantar sensor, and the local pressure sensing point / measured position of the plantar sensor is detected and calibrated by the plantar sensor and the pressing block. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 is a schematic structural diagram of a calibration device for a plantar sensor of the present invention;
[0032] Figure 2 is a schematic diagram of the structure of the calibration component;
[0033] Figure 3 It is a structural diagram of the linear module;
[0034] Figure 4 It is a partial cross-sectional view of the linear module.
[0035] Markings in the figure: 1 calibration device, 11 stage;
[0036] 2 linear module, 21 first linear module, 22 second linear module, 23 third linear module, 24 fourth linear module, 251 eccentric handle, 252 bracket, 253 lead screw, 254 slider, 255 coupling, 256 nut, 26 slide rail;
[0037] 3 detection component, 31 third connecting member, 32 third mounting plate, 33 first standard sensor, 35 pressure block, 351 connecting part, 352 pressing part, 355 first pressure block, 356 second pressure block, 36 fourth mounting plate, 361 second mounting boss, 37 second standard sensor; 5 plantar sensor. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.
[0039] The present invention is further described in detail below in conjunction with the accompanying drawings:
[0040] Overview: The plantar sensor is an important part of gait detection devices, plantar correctors, sit-stand balance detectors and plantar sensors. The flat or plate-structured plantar sensor can collect pressure from various parts of the sole and detect the pressure distribution of the sole. Combined with plantar detection during walking, the walking gait can be obtained.
[0041] The present invention provides a calibration device 1 for a plantar sensor, such as Figure 1-Figure 4 , including multiple linear modules 2 and detection components 3; the linear module 2 includes a first linear module 21, a second linear module 22 and a third linear module 23; the second linear module 22 is installed at the output end of the first linear module 21, the third linear module 23 is longitudinally arranged at the output end of the second linear module 22, and the detection component 3 is arranged at the output end of the third linear module 23; the detection component 3 includes a standard sensor and a pressure block 35 installed on the lower side of the standard sensor, and the lower end of the pressure block 35 is provided with a pressing part 352 that cooperates with the plantar sensor 5.
[0042] The horizontal position of the pressing block 35 is adjusted by the first linear module 21 and the second super module, the longitudinal position is adjusted by the third linear module 23, and pressure is provided to the pressing block and the plantar sensor 5. The local pressure sensing point / measured position of the plantar sensor is detected and calibrated by the plantar sensor and the pressing block.
[0043] like Figure 2 The detection assembly 3 also includes at least one first mounting boss (not shown in the figure), and the first standard sensor 33 is installed on the lower side of the first mounting boss; the connecting portion 351 at one end of the first pressing block 355 is detachably installed on the lower side of the first standard sensor 33.
[0044] The detection component 3 also includes a third connecting member 31 and a third mounting plate 32 . The third connecting member 31 is installed at the output end of the third linear module 23 . The third mounting plate 32 is longitudinally installed on the third connecting member 31 . The first mounting boss is installed at the lower end of the third mounting plate 32 .
[0045] Optionally, a fourth linear module 24 is also installed on one side of the third connecting member 31, and a fourth mounting plate 36 is provided at the output end of the fourth linear module; at least one second mounting boss 361 is provided at the lower end of the fourth mounting plate 36; and a detachable second standard sensor 37 is provided on the second mounting boss 361.
[0046] More specifically, the pressing area of the second pressing block 356 on the lower side of the second standard sensor 37 is smaller than the pressing area of the first pressing block 355 on the lower side of the first standard sensor 33; the measuring range of the second standard sensor is smaller than the measuring range of the first standard sensor 33. According to the needs of the detection, one of the standard sensors 37 can be selected for detection. Among them, the detection component can select and replace different pressing blocks according to the detection needs of the sole sensor, and the pressing area of the pressing block is: 25-900mm 2 , but not limited to this.
[0047] Figure 1 Also shown is a stage 11 disposed at the lower side of the first linear module 21, and a foot sensor disposed at the upper side of the stage 11. A slide rail 26 is disposed at one side of the first linear module 21, and one end of the second linear module 22 is slidably mounted on the slide rail 26. The moving / pushing directions of the first linear module 21 and the second linear module 22 are perpendicular to each other, pushing the third linear module / pressing block to move on the XY plane.
[0048] like Figure 3 A specific linear module 2 includes a bracket 252, a driving mechanism, a lead screw 253 and a nut 256 matched with the lead screw 253; the lead screw 253 is rotatably mounted in the bracket 252, and the output end of the driving mechanism is connected to the lead screw 253. It should be noted that the lengths of the multiple linear modules of the present invention and the structure of the bracket 262 can be designed differently according to actual needs.
[0049] The driving mechanism may be a servo motor or an eccentric handle 251. The output shaft of the driving mechanism is connected to the lead screw 253 via a coupling 255; a slider 254 is installed on the outer side of the nut 256. The slider 254 serves as the output end of the linear module 2.
[0050] The operating method of the calibration device comprises:
[0051] Step 101: Place the foot sensor on the stage.
[0052] Step 102: If the measuring range of the first standard sensor 37 and the pressing area of the first pressing block below it match the position to be measured, execute steps 201 to 203:
[0053] Step 201: The horizontal position of the pressing block 35 is adjusted by the first linear module 21 and the second linear module 22 so that the pressing block 25 corresponds to the position to be measured of the plantar sensor.
[0054] Step 202: Control the first pressing block 355 to descend and press on the position to be tested through the third linear module 23 .
[0055] Step 203: Calibrate the plantar sensor using the detection values of the first standard sensor and the plantar sensor.
[0056] Step 102: If the measuring range of the second standard sensor 37 and the pressing area of the lower pressing block match the position to be measured, execute steps 301 to 304:
[0057] Step 301: Control the first pressing block 355 to rise via the third linear module 23 to be higher than the stage and / or the upper end surface of the first linear module.
[0058] Step 302: The horizontal position of the second pressing block 356 is adjusted by the first linear module 21 and the second linear module 22 so that the second pressing block 356 corresponds to the position to be measured of the plantar sensor.
[0059] Step 303: Control the second pressing block 356 to descend through the fourth linear module 24 and press it on the position to be tested.
[0060] Step 304: Calibrate the plantar sensor using the detection values of the second standard sensor and the plantar sensor.
[0061] According to the needs of detection, two different standard sensors and pressure blocks can be selected to facilitate detection and improve detection efficiency; and the third linear module and the fourth linear module can be coordinated to avoid the first standard sensor and the first pressure block from interfering with the detection of the second standard sensor.
[0062] In some of the processes described in the specification and claims of this application and the above-mentioned figures, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed in the order in which they appear in this article or may be executed in parallel. The serial numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different mechanisms, devices, modules, etc., and do not represent the order of precedence, nor do they limit the "first" and "second" to be different types.
[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A calibration device for a plantar sensor, characterized in that: It comprises a plurality of linear modules (2) and a detection component (3); The linear module (2) comprises a first linear module (21), a second linear module (22) and a third linear module (23); The second linear module (22) is installed at the output end of the first linear module (21), the third linear module (23) is longitudinally arranged at the output end of the second linear module (22), and the detection component (3) is arranged at the output end of the third linear module (23); The detection assembly (3) comprises a standard sensor and a pressing block (35) installed on the lower side of the standard sensor, and the lower end of the pressing block (35) is provided with a pressing portion (352) that matches the sole sensor (5).
2. The calibration device according to claim 1, characterized in that: The detection assembly (3) further comprises at least one first mounting boss, and the first standard sensor (33) is mounted on the lower side of the first mounting boss; The connecting portion (351) at one end of the first pressing block (355) is detachably mounted on the lower side of the first standard sensor (33).
3. The calibration device according to claim 2, characterized in that: The detection assembly (3) further comprises a third connecting member (31) and a third mounting plate (32). The third connecting member (31) is installed at the output end of the third linear module (23); The third mounting plate (32) is longitudinally mounted on the third connecting member (31); The first mounting boss is mounted on the lower end of the third mounting plate (32).
4. The calibration device according to claim 3, characterized in that: It also includes a fourth linear module (24) installed on one side of the third connecting member (31), and a fourth mounting plate (36) is provided at the output end of the fourth linear module; At least one second mounting boss (361) is provided at the lower end of the fourth mounting plate (36); a detachable second standard sensor (37) is provided on the second mounting boss (361).
5. The calibration device according to claim 4, characterized in that: The pressing area of the second pressing block (356) at the lower side of the second standard sensor (37) is smaller than the pressing area of the first pressing block (355) at the lower side of the first standard sensor (33); The measuring range of the second standard sensor is smaller than the measuring range of the first standard sensor (33).
6. The calibration device according to claim 1, characterized in that: It also includes a loading platform (11) arranged on the lower side of the first linear module (21), and a foot sensor is arranged on the upper side of the loading platform (11).
7. The calibration device according to claim 1, characterized in that: A slide rail (26) is provided on one side of the first linear module (21). One side of the second linear module (22) is slidably mounted on the slide rail (26).
8. The calibration device according to claim 1, characterized in that: The linear module (2) comprises a bracket (252), a driving mechanism, a lead screw (253) and a nut (256) matched with the lead screw (253); The lead screw (253) is rotatably mounted in the bracket (252), and the output end of the driving mechanism is connected to the lead screw (253).
9. The calibration device according to claim 8, characterized in that: The driving mechanism includes a servo motor or an eccentric handle (251); The output shaft of the driving mechanism is connected to the lead screw (253) via a coupling (255); A sliding block (254) is installed on the outer side of the nut (256).
10. The calibration device according to any one of claims 1 to 9, characterized in that: The operating method of the calibration device comprises: Place the plantar sensor on the stage; If the measuring range of the first standard sensor and the pressing area of the first pressing block below it match the position to be measured: The horizontal position of the pressing block is adjusted by the first linear module and the second linear module, so that the pressing block corresponds to the position to be measured of the plantar sensor; the first pressing block is controlled to descend and press on the position to be measured by the third linear module; the plantar sensor is calibrated by the detection values of the first standard sensor and the plantar sensor; If the measuring range of the second standard sensor and the pressing area of the lower pressure block match the position to be measured: The first pressing block is controlled to be higher than the worktable through the third linear module; the horizontal position of the second pressing block is adjusted through the first linear module and the second linear module, so that the second pressing block corresponds to the position to be measured of the plantar sensor; the second pressing block is controlled to descend through the fourth linear module and pressed on the position to be measured; the plantar sensor is calibrated through the detection values of the second standard sensor and the plantar sensor.