Multi-dimensional force measuring device used in foot deformation process

Abstract

The invention discloses a multi-dimensional force measuring device used in a foot deformation process. The multi-dimensional force measuring device comprises a heel force measuring module, a sole force measuring module, a rear force measuring module and a front force measuring module which are used for synchronously measuring horizontal force and vertical force. The heel force measuring module is used for measuring the vertical force downwards generated by the heel position after the foot is loaded; the sole force measuring module is used for measuring a vertical force downwards generated by the sole position after the foot is loaded; the rear force measuring module is used for measuring the horizontal force generated by the heel position in the backward direction after the foot bears the load and deforms; the front force measuring module is used for measuring the horizontal force generated in the forward direction of the sole position after the foot is loaded and deformed; the resultant force measured by the heel force measuring module and the sole force measuring module in the vertical direction is the force borne by the foot in the vertical direction. The high-precision pressure sensor is adopted, high-precision partitioning of the heel area and the sole area is achieved, and force generated in the foot load-bearing deformation process is measured in a multi-dimensional mode.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of measurement, and relates to a multi-dimensional force measurement technology generated in the process of foot deformation under load, in particular to a multi-dimensional force measurement device used in the process of foot deformation. BACKGROUND

[0002] There are two common plantar force measurement devices, one is a force platform, which is single-dimensional or three-dimensional, single-dimensional measures a vertical force, and multi-dimensional can measure tangential force (two directions X, Y) and vertical force; the other is a pressure plate, which can measure the pressure distribution of the plantar interface through a pressure sensor array, and can also measure the pressure information of the required force point by discretely arranging pressure sensors. However, there is still a lack of multi-dimensional force measurement method and device for the process of foot deformation under load, which is crucial for the evaluation of foot mechanics function. SUMMARY

[0003] The present application aims to solve at least one of the technical problems existing in the prior art; for this purpose, the present application provides a multi-dimensional force measurement device used in the process of foot deformation, which is used to solve the technical problem that there is no measurement scheme for the force generated in the process of foot deformation under load, and solves the above-mentioned problem by the scheme of high-precision partition of the heel area and the sole area cooperating with the pressure sensor.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides a multi-dimensional force measurement device used in the process of foot deformation, characterized in that it comprises a heel force measurement module, a sole force measurement module, a rear force measurement module and a front force measurement module for synchronously measuring horizontal force and vertical force; The heel force measurement module is used to measure the vertical force generated by the heel position downward after the foot is under load; The sole force measurement module is used to measure the vertical force generated by the sole position downward after the foot is under load; The rear force measurement module is used to measure the horizontal force generated by the heel position in the rear direction after the foot is under load and deformed; The front force measurement module is used to measure the horizontal force generated by the sole position in the front direction after the foot is under load and deformed; The resultant force measured by the heel force measurement module and the sole force measurement module in the vertical direction is the force received by the foot in the vertical direction; A sliding groove is formed in the base, and the heel force measurement module and the sole force measurement module are slidingly arranged in the sliding groove, and the rear force measurement module and the front force measurement module are respectively arranged at both ends of the sliding groove and fixedly connected to the base.

[0005] A use method of a multi-dimensional force measurement device used in the process of foot deformation, the specific steps are as follows: Step one: before use, the heel force module and the instep force module are respectively contacted with the corresponding rear force module and the front force module, and the pressure sensor B in the rear force module and the front force module is manually zeroed; Step two: using the measuring tool, the length of the foot to be measured is measured, and the position of the heel cup is adjusted, so that the distance D from the rear end of the heel to the division line and the length L of the foot to be measured are in the relationship: D = 39% L. Step three: the foot to be measured is taken as the heel, the heel is tightly attached to the inner arc surface of the heel cup, and the heel area and the instep area are respectively stepped on the corresponding force modules, and then the multi-dimensional force measuring device can obtain the vertical force and the front and rear horizontal force generated after the deformation of the foot through the pressure sensors A and B.

[0006] Compared with the prior art, the beneficial effects of the present application are: The present application can synchronously measure the foot load and the horizontal force generated after the deformation of the foot by setting the heel force module and the instep force module which can move relatively, and cooperating with high-precision pressure sensors.

[0007] The present application uses high-precision pressure sensors to realize high-precision partitioning of the heel area and the instep area and multi-dimensional measurement of the force generated in the deformation process of the foot load. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0009] Figure 1 It is a structural schematic diagram of the present application.

[0010] Figure 2 It is a schematic diagram of the force plate in the present application.

[0011] Figure 3 It is another schematic diagram of the force plate in the present application.

[0012] Figure 4 It is another schematic diagram of the present application. DETAILED DESCRIPTION

[0013] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. Embodiment

[0014] Please refer to Figures 1-2 The figure, the first aspect of the present application provides a kind of for the multi-dimensional force measurement device in the deformation process of foot, including heel force module 1, sole force module 2, rear force module 3, heel cup 4, front force module 5 and base 6, the chute 61 is opened in the base 6, and heel force module 1 and sole force module 2 are slidably arranged in chute 61, the both ends of chute 61 are provided with rear force module 3 and front force module 5 respectively, and rear force module 3 and front force module 5 are fixedly connected on base 6;By the above-mentioned setting, can make the present application can be synchronous measurement vertical force that foot is received after being loaded and horizontal force that foot deformation generates after being loaded.

[0015] Specifically, The heel force module 1 and the sole force module 2 all include bull's eye universal ball 11, bottom plate 12, force plate 13 and pressure sensor A 14, the lower surface of force plate 13 is close to the position of four corners and is connected to the upper surface of bottom plate 12 by four pressure sensor A 14 respectively;Four bull's eye universal balls 11 are fixedly connected to the lower surface of bottom plate 12 by screw near the position of four corners, the ball of bull's eye universal ball 11 is correspondingly connected in chute 61, the cross section of chute 61 is arc matched with ball, to ensure that heel force module 1 and sole force module 2 can slide in chute 61; The rear force module 3 and the front force module 5 all include contact plate 31, pressure sensor B 32 and vertical support plate 33, vertical support plate 33 is fixedly connected perpendicularly on base 6, pressure sensor B 32 is fixedly connected on vertical support plate 33, the sensing end of pressure sensor B 32 is horizontally arranged, while the sensing end of pressure sensor B 32 is connected to contact plate 31, and contact plate 31 is used to contact with heel force module 1 or sole force module 2, so as to obtain the pressure of vertical support plate 33 extruded by pressure sensor B 32.

[0016] The force plate 13 in the heel force module 1 is provided with heel cup 4 above, the main body of heel cup 4 is a C-shaped piece for limiting heel, and the bottom of heel cup 4 can be adsorbed on the force plate 13 made of ferromagnetic metal by inlaying magnet, or can be positioned by other ways.

[0017] As Figure 3 Another embodiment of the positioning of heel cup 4, two tracks 7 are connected to the two sides of heel cup 4, track slot is opened in the middle of track 7, and screw is connected to the force plate 13 in heel force module 1 through track slot, to realize positioning.

[0018] Scale can be provided on the force plate 13.

[0019] The position where the human foot deformation occurs is located above the gap between the heel force measuring module 1 and the foot sole force measuring module 2; Specifically, the above-mentioned dividing line of the midpoint of the gap is taken as a reference (which can be measured manually and then drawn on the base 6 in the form of an icon pointer), and in use, the rear end of the heel is attached to the inner arc surface of the heel cup, and the heel area and the foot sole area are respectively stepped on the corresponding force measuring modules, and the distance D from the rear end of the heel to the dividing line and the length L of the foot to be measured are in the relationship of D = 39% L. The dividing line and the dividing ratio with reference to the dividing line are combined with foot anatomy and the mechanical transmission principle of the arch, because this position is conducive to the deformation of the foot after loading, and also conducive to reducing the stress points of the heel area and the foot sole area. In actual use, a measuring ruler is used to measure the foot length and position the heel cup 4 to facilitate accurate positioning of the foot.

[0020] When measuring, the human foot is stepped on the heel force measuring module 1 and the foot sole force measuring module 2, and the vertical force is measured through the pressure sensor A14 under the heel force measuring module 1 and the foot sole force measuring module 2; at the same time, after the foot is stepped down, the foot is deformed and drives the heel force measuring module 1 and the foot sole force measuring module 2 to respectively extrude the rear force measuring module 3 and the front force measuring module 5 to obtain the measurement of the horizontal force.

[0021] In actual use, the vertical support plates 33 of the rear force measuring module 3 and the front force measuring module 5 can be manually adjusted in distance according to the length of the foot to be measured, and are fixedly connected on the base 6 by using screws.

[0022] The pressure sensor A14 and the pressure sensor B32 can adopt high-precision pressure sensors, such as capacitive pressure sensors, strain gauge pressure sensors, or piezoelectric pressure sensors, etc.

[0023] The pressure sensor A14 and the pressure sensor B32 are conditioned through signal amplification circuit, filter circuit, etc. After A / D converter (such as ADS1232, HX711, etc.), the signal is transmitted to the microprocessor (such as STM32F103, ArduinoUno, etc.), and then the obtained information is displayed on the display connected to the microprocessor. Embodiment

[0024] Referring to Figure 4 In the embodiment, the flexible pad 7 and the pad plate 8 are also included, the flexible pad 7 is bonded on the force measuring plate 13, and the pad plate 8 is bonded on the flexible pad 7, and by setting the flexible pad 7, the pad plate 8 thereon can adaptively deform following the stepping position of the human foot, so as to ensure accurate measurement of the vertically downward force.

[0025] The pad plate 8 adopts ferromagnetic metal material, which is convenient for magnet adsorption. Embodiment

[0026] The embodiment provides a multi-dimensional force measurement method for foot deformation process, and the specific steps are as follows: Step one: before use, the heel force measurement module 1 and the foot palm force measurement module 2 are respectively contacted with the corresponding rear force measurement module 3 and the front force measurement module 5, and the pressure sensor B32 in the rear force measurement module 3 and the front force measurement module 5 is manually zeroed. Specifically, the magnetic attraction method can be used to make the force plate 13 of the heel force measurement module 1 and the force plate 13 of the foot palm force measurement module 2 respectively contact with the contact plate 31 of the rear force measurement module 3 and the contact plate 31 of the front force measurement module 5, so as to avoid the problem of inaccurate deformation pressure value caused by poor contact; Further, the force plate 13 is made of ferromagnetic metal or inlaid with ferromagnetic metal in the adsorption part, and the contact plate 31 is inlaid with a magnet; After preliminary positioning, the pressure sensors A and B in the measurement system are zeroed; Step two: use the measurement tool to measure the length of the foot to be measured, and adjust the position of the heel cup 4, so that the distance D from the rear end of the heel to the division line is related to the length L of the foot to be measured: D = 39% L; Step three: take the foot to be measured as a reference, tightly paste the heel into the inner arc surface of the heel cup, and make the heel area and the foot palm area step on the corresponding force measurement modules respectively, then the multi-dimensional force measurement device can obtain the vertical force and the front and rear horizontal force generated after the deformation of the foot through the pressure sensors A and B.

[0027] Multiple measurements are used to reduce errors, and the measurement is strictly in accordance with the above method.

[0028] Further, the multi-dimensional force measurement device for foot deformation process can be used together with two groups.

[0029] Further, the vertical force is the sum of the forces measured by the heel force measurement module 1 and the foot palm force measurement module 2, and the vertical force is the force generated by the foot load, which can be realized by converting the sitting posture to the standing posture and then to the single leg standing posture, or by realizing the back load.

[0030] The above embodiment is only used to illustrate the technical method of the present application, and is not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A multidimensional force measuring device for foot deformation process, characterized in that, It includes a heel force measurement module, a foot ball force measurement module, a rear force measurement module, and a front force measurement module for simultaneously measuring horizontal and vertical forces; The heel force measurement module is used to measure the vertical force generated downward from the heel when the foot is bearing weight. The foot force measurement module is used to measure the vertical force generated downward by the foot when the foot is under weight-bearing. The rear force module is used to measure the horizontal force generated in the rearward direction at the heel position after the foot bears weight and deforms. The front force measurement module is used to measure the horizontal force generated in the forward direction of the foot after bearing weight and deforming. The resultant force measured by the heel force measuring module and the foot force measuring module in the vertical direction is the force exerted on the foot in the vertical direction. The base has a sliding groove, and the heel force measuring module and the ball of the foot force measuring module are slidably disposed in the sliding groove. The rear force measuring module and the front force measuring module are respectively disposed at both ends of the sliding groove, and the rear force measuring module and the front force measuring module are fixedly connected to the base.

2. The multidimensional force measuring device for foot deformation process according to claim 1, characterized in that, Both the heel force measurement module and the ball of foot force measurement module include a bullseye omnidirectional ball, a base plate, a force measuring plate, and pressure sensors A. The lower surface of the force measuring plate is connected to the upper surface of the base plate via four pressure sensors A near the four corners. The lower surface of the base plate is fixedly connected to four bullseye omnidirectional balls near the four corners via screws, and the ball bearings of the bullseye omnidirectional balls are correspondingly connected to the sliding grooves.

3. A multidimensional force measuring device for foot deformation process according to claim 2, characterized in that, The cross-section of the groove is an arc shape that matches the ball bearings, to ensure that the heel force measuring module and the foot force measuring module can slide within the groove.

4. A multidimensional force measuring device for foot deformation process according to claim 1, 2 or 3, characterized in that, Both the rear force measuring module and the front force measuring module include a contact plate, a pressure sensor B, and a vertical support plate. The vertical support plate is vertically fixedly connected to the base, and the pressure sensor B is fixedly connected to the vertical support plate. The sensing end of the pressure sensor B is horizontally set, and the sensing end of the pressure sensor B is connected to the contact plate. The contact plate is used to contact the rear force measuring module or the front force measuring module.

5. A multidimensional force measuring device for foot deformation process according to claim 4, characterized in that, The heel measuring module has a heel cup above the measuring plate. The main body of the heel cup is a C-shaped piece used to limit the heel.

6. A multidimensional force measuring device for foot deformation process according to claim 5, characterized in that, The force measuring plates are all equipped with scales.

7. A method of using a multidimensional force measuring device for foot deformation processes, characterized in that, The specific steps are as follows: Step 1: Before use, connect the heel force sensor module and the ball of the foot force sensor module to their corresponding rear force sensor module and front force sensor module respectively, and manually reset the pressure sensor B in the rear force sensor module and the front force sensor module to zero. Step 2: Use a measuring tool to measure the length of the foot to be measured, and adjust the position of the heel cup so that the relationship between the distance D from the back of the heel to the dividing line and the length L of the foot to be measured is: D = 39%L; Step 3: With the heel as the reference, place the foot to be tested against the inner arc surface of the heel cup, and let the heel area and the ball of the foot step on the corresponding force measuring module respectively. Then, the multi-dimensional force measuring device can obtain the vertical force and the front and back horizontal force generated after the foot deformation through pressure sensors A and B.

8. A method for measuring multidimensional force during foot deformation according to claim 7, characterized in that, Two sets of multidimensional force measurement devices are used together for foot deformation processes.

9. A method for measuring multidimensional force during foot deformation according to claim 7 or 8, characterized in that, The vertical force is the force generated by the weight-bearing of the feet. This weight-bearing is achieved by transitioning from a sitting to a standing posture to a single-leg standing posture, or by bearing weight on the back.

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