Sole force information sensing pad, pedal fixing device and rehabilitation training instrument

Abstract

The utility model relates to the technical field of rehabilitation instruments, in particular to a sole force information sensing pad, a pedal fixing device and a rehabilitation training instrument. The sole force information sensing pad comprises a pad base, an air cushion layer and a hardware acquisition unit; the cushion base is made of a flexible material; the air cushion layer is arranged on the cushion base, and the air cushion layer is at least divided into a half sole outer side air cushion area, a half sole inner side air cushion area and a heel air cushion area; the boundary of the half sole outer side air cushion area and the half sole inner side air cushion area is close to or coincides with the center line of the heel air cushion area in the longitudinal direction. The hardware acquisition unit comprises a controller, a circuit board and a plurality of air pressure sensors which are respectively used for acquiring air pressure in the half sole outer side air cushion area, the half sole inner side air cushion area and the heel air cushion area; the air pressure sensors and the controller are electrically connected with the circuit board; the sole force information sensing pad is good in comfort and high in stress distinguishing precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to a healthy appliance technical field, concretely relates to a foot bottom force information perception mat, footstep fixing device and rehabilitation training instrument. BACKGROUND

[0002] In the field of foot health monitoring and sports science, accurate measurement of foot bottom pressure distribution is the core technology for evaluating gait, diagnosing foot diseases and optimizing sports posture. Traditional foot bottom pressure measurement equipment mostly uses rigid sensor arrays or piezoelectric films, which can provide basic pressure data, but has the following problems:

[0003] Poor comfort: long-term contact with the foot bottom by rigid materials can easily cause discomfort, especially during rehabilitation or long-term exercise; low partitioning accuracy: most equipment can only roughly divide the foot bottom area (such as the forefoot and heel), and cannot finely divide key stress areas such as the lateral and medial sides of the forefoot, resulting in insufficient data granularity; it is relatively difficult to integrate into sports equipment; it cannot evaluate the rationality of foot force for different foot length populations, and it is relatively difficult to adapt to the mirror image evaluation needs of foot force between the healthy side and the affected side. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a foot bottom force information perception mat, a footstep fixing device and a rehabilitation training instrument, which has good comfort and high stress area partitioning accuracy.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a foot bottom force information perception mat, comprising:

[0006] A mat base made of flexible material;

[0007] A gas cushion layer arranged on the mat base, the gas cushion layer is divided into at least a lateral forefoot gas cushion area, a medial forefoot gas cushion area and a heel gas cushion area; the boundary line between the lateral forefoot gas cushion area and the medial forefoot gas cushion area is adjacent to or coincides with the center line of the longitudinal direction of the heel gas cushion area;

[0008] A hardware acquisition unit including a controller, a circuit board and a plurality of gas pressure sensors respectively used for acquiring the gas pressure in the lateral forefoot gas cushion area, the medial forefoot gas cushion area and the heel gas cushion area, the gas pressure sensors and the controller are electrically connected to the circuit board.

[0009] In an embodiment of the utility model, the gas cushion layer includes arrayed gas cushion units;

[0010] Each gas cushion unit in the lateral forefoot gas cushion area is connected to each other, each gas cushion unit in the medial forefoot gas cushion area is connected to each other, and each gas cushion unit in the heel gas cushion area is connected to each other.

[0011] In an embodiment of the utility model, the interval between the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area is adjustable.

[0012] In an embodiment of the utility model, the heel air cushion area is integrally connected with the cushion base, and the interval between the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area is adjustable.

[0013] In an embodiment of the utility model, the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area are integrally connected with the cushion base, the intersection center position of the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area is consistent with the foot longitudinal center position, and the lateral forefoot air cushion area and the medial forefoot air cushion area are symmetrically arranged.

[0014] In an embodiment of the utility model, the circuit board comprises a power supply circuit, a pre-conditioning circuit, an analog-digital conversion circuit and a signal transmission module electrically connected.

[0015] Each air pressure sensor respectively collects the air pressure signals in the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area, and transmits the signals to a display end through the signal transmission module after processing by the circuit board.

[0016] In an embodiment of the utility model, the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area are respectively connected with the corresponding air pressure sensors through flexible pipes.

[0017] In an embodiment of the utility model, the air cushion unit is a hemispherical shell structure.

[0018] To achieve the above object and other related objects, the utility model provides a foot pedal fixing device, which comprises the foot bottom force information sensing pad.

[0019] In an embodiment of the utility model, the foot pedal fixing device further comprises:

[0020] A foot pedal main body is used for supporting the user's foot.

[0021] A limiting and adjusting assembly is arranged on the foot pedal main body, and is configured to adjust the position of the foot on the foot pedal main body, so that the intersection center position of the lateral forefoot air cushion area, the medial forefoot air cushion area and the heel air cushion area is consistent with the foot longitudinal center position on the foot pedal main body; wherein the foot longitudinal direction is from the forefoot to the heel.

[0022] To achieve the above object and other related objects, the utility model provides a rehabilitation training instrument, which comprises the foot pedal fixing device.

[0023] In an embodiment of the utility model, the rehabilitation training equipment further includes a mirror training module, the mirror training module includes:

[0024] Data comparison submodule, with two the hardware acquisition unit data connection, be used for receiving and comparing the air pressure signal of user left and right feet in the forefoot outside air cushion area, the forefoot inside air cushion area and the heel air cushion area;

[0025] Feedback signal generation submodule, with the data comparison submodule electricity is connected, is used for generating left and right foot pressure distribution difference signal according to comparison result;

[0026] Display interface, with the feedback signal generation submodule electricity is connected, is used for difference signal output to external display equipment, to visualize left and right foot pressure thermodynamic diagram and / or difference threshold prompt.

[0027] Summarized above, the utility model discloses through the connection of cushion base, air cushion layer and hardware acquisition unit forms plantar force information perception pad, and the cushion base of flexible material is set up with air cushion layer buffer and reduces foot fatigue, is suitable for rehabilitation and long time movement scene;

[0028] The forefoot outside air cushion area, the forefoot inside air cushion area and the heel air cushion area at least three regional independent monitoring can identify abnormal posture such as varus, pes canvas and provide detailed data for clinical diagnosis or rehabilitation training, thereby solve the problem of low partition accuracy of traditional equipment poor comfort. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0030] Figure 1 It is three-dimensional structure schematic view of plantar force information perception pad in an embodiment of the utility model;

[0031] Figure 2 It is side structure schematic view of plantar force information perception pad in an embodiment of the utility model;

[0032] Figure 3 It is overhead structure schematic view of plantar force information perception pad in an embodiment of the utility model;

[0033] Figure 4 It is the structure schematic view that each air cushion unit in the forefoot outside air cushion area, the forefoot inside air cushion area and the heel air cushion area in an embodiment of the utility model is connected respectively;

[0034] Figure 5 Figure 1 is a structural schematic diagram of a controller in an embodiment of the present application;

[0035] Figure 6 Figure 2 is a structural schematic diagram of a foot force information sensing mat installed on a foot pedal fixing device in an embodiment of the present application;

[0036] Element number explanation: mat base 1, air cushion layer 2, forefoot outer air cushion area 21, forefoot inner air cushion area 22, heel air cushion area 23, hardware acquisition unit 3, air pressure sensor, air cushion unit 201, flexible tube 24, foot pedal main body 1001, limiting adjustment assembly 2001, forefoot limiting part 20011, heel limiting part 20012, length adjustment mechanism 20013. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied in different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are for describing specific specific embodiments, not for limiting the protection scope of the present application. The test methods not specified in the following embodiments are usually performed under conventional conditions or under conditions recommended by the manufacturers.

[0038] Please refer to Figures 1 to 6 It should be noted that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical significance to limit the conditions under which the present application can be implemented. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, not for limiting the scope of the present application, and the change or adjustment of the relative relationship without substantially changing the technical content is also considered as the scope of the present application.

[0039] When the embodiments give a numerical range, it should be understood that, unless otherwise specified by the utility model, both ends of each numerical range and any one numerical between the two ends can be selected. Unless otherwise defined, all technical and scientific terms used in the utility model are used by the skilled in the art and the description of the utility model, and any method, equipment and material of the prior art similar or equivalent to the method, equipment and material described in the embodiments of the utility model can be used to realize the utility model.

[0040] Please refer to Figure 1 The utility model provides a kind of plantar force information sensing mat, including mat base 1, air cushion layer 2 and hardware acquisition unit 3;

[0041] The mat base 1 is made of flexible material;The air cushion layer 2 is arranged on the mat base 1, and the air cushion layer 2 is at least divided into forefoot lateral air cushion area 21, forefoot medial air cushion area 22 and heel air cushion area 23;The demarcation line of the forefoot lateral air cushion area 21 and the forefoot medial air cushion area 22 is adjacent to or coincides with the center line of the longitudinal direction of the heel air cushion area 23;The hardware acquisition unit 3 includes a controller, a circuit board and a plurality of air pressure sensors for collecting air pressure in the forefoot lateral air cushion area 21, the forefoot medial air cushion area 22 and the heel air cushion area 23 respectively, and the air pressure sensors and the controller are electrically connected to the circuit board.

[0042] It should be noted that the mat base 1 can be made of flexible material, further, made of flexible high polymer material, for example, the material of the mat base 1 is made of silica gel material or thermoplastic elastomer TPE or thermoplastic polyurethane TPU, etc., which has flexibility and durability, silica gel provides high resilience and biocompatibility, and TPE / TPU enhances tear resistance. Flexible mat base 1 can fit the curve of the sole, disperse local pressure, avoid the compression feeling of the foot caused by hard material, and be suitable for long-term use.

[0043] The air cushion layer 2 is designed in zones, at least divided into forefoot lateral, forefoot medial and heel three independent air cushion areas, each area corresponds to a key stress point of the sole;The air cushion of each area reflects the pressure distribution of the sole through internal air pressure change, while buffering impact force, improving comfort;It should be understood that the forefoot lateral air cushion area 21, the forefoot medial air cushion area 22 and the heel air cushion area 23 can also be further refined into more sub-areas or the air cushion layer 2 can further increase more sub-areas, for example, the air cushion layer 2 can also be divided into independent air cushion areas such as toe area, arch area, heel lateral area and heel medial area, to realize more refined zoning and improve the accuracy of stress area.

[0044] The longitudinal direction of the heel air cushion area 23 is the direction from the heel air cushion area 23 to the front lateral air cushion area 21 and the front medial air cushion area 22, that is, the front-rear direction of the foot after the foot is placed on the plantar force information sensing mat. The boundary line between the front lateral air cushion area 21 and the front medial air cushion area 22 is adjacent to or coincides with the center line of the longitudinal direction of the heel air cushion area 23, for example, the boundary line between the front lateral air cushion area 21 and the front medial air cushion area 22 is within one centimeter of the center line of the longitudinal direction of the heel air cushion area 23, or the boundary line between the front lateral air cushion area 21 and the front medial air cushion area 21 is completely coincides with the center line of the longitudinal direction of the heel air cushion area 23. Because, the air cushion partition of the traditional plantar pressure pad may not be aligned with the natural anatomical structure of the foot, resulting in that the corresponding sensor cannot accurately capture the real distribution of the key stress area; if the front medial-lateral boundary line is misaligned with the center line of the heel, the user's foot is slightly misaligned, which may cause the air cushion area to be misaligned with the actual stress area, resulting in errors; at the same time, the reliability of rehabilitation training and gait analysis is limited, and the inaccurate partition design may affect the identification of abnormal postures such as pronation, supination and foot drop, thereby limiting the reliability of rehabilitation training and gait analysis. Therefore, by making the boundary line between the front lateral air cushion area 21 and the front medial air cushion area 22 adjacent to or coinciding with the center line of the longitudinal direction of the heel air cushion area 23, in terms of improving the accuracy of pressure distribution detection, after the boundary line is aligned with the center line of the heel, the air cushion area is more consistent with the natural stress area of the foot (such as metatarsal, arch, heel), ensuring that the stress detection covers the key biomechanical points; in terms of enhancing measurement consistency, reducing pressure data deviation caused by foot placement deviation, and improving the comparability of measurement results of different users or the same user; in terms of optimizing abnormal posture recognition capability, accurate partition layout can more sensitively capture the subtle pressure changes of pronation, supination and foot drop, and provide reliable data for clinical diagnosis.

[0045] The number of air pressure sensors is the same as the number of areas of the air cushion layer 2, and each partition of the air cushion layer 2 corresponds to one high-precision air pressure sensor, so as to monitor the air pressure change of each partition in real time; the hardware acquisition unit 3 integrates a microcontroller (such as an STM32 series) and a customized PCB board to realize signal amplification, filtering and analog-digital conversion; after the sensor data is processed by the circuit board, it is wirelessly transmitted to a PC or a mobile terminal through a signal transmission module (such as Bluetooth or wireless network) to generate a visual pressure distribution map.

[0046] Specific air pressure sensing principle: the pressure on the sole causes the volume change of the air cushion, the air pressure sensor detects the relative pressure (relative to the ambient atmospheric pressure), and converts the pressure value into an electrical signal through a linear relationship (for example, P = K·F, K is the proportional coefficient, F is the pressure applied by the foot, and P is the relative pressure value), the flexible material allows the air cushion layer 2 to dynamically adjust with the deformation of the foot, ensures that the air cushion layer 2 is in full contact with the sole, improves the accuracy of the air pressure sensor in detecting the air pressure in the air cushion layer 2, and avoids data distortion.

[0047] In the case, the mat base 1 made of flexible material and the air cushion layer 2 are arranged to reduce foot fatigue, which is suitable for rehabilitation and long-time sports scenes; at least three regions including the lateral forefoot air cushion area 21, the medial forefoot air cushion area 22 and the heel air cushion area 23 are independently monitored to identify abnormal postures such as internal rotation and toe drop, and provide detailed data for clinical or rehabilitation training diagnosis, thereby solving the problems of poor comfort and low partitioning accuracy of traditional equipment.

[0048] Please refer to Figures 1-4 , as an optional embodiment of the utility model, the air cushion layer 2 includes arrayed air cushion units 201;

[0049] The air cushion units 201 in the lateral forefoot air cushion area 21 are interconnected, the air cushion units 201 in the medial forefoot air cushion area 22 are interconnected, and the air cushion units 201 in the heel air cushion area 23 are interconnected.

[0050] It should be noted that when the foot bottom is stepped on the sensing mat, the air cushion unit 201 arranged in an array can better adapt to the complex shape and pressure distribution of the foot bottom. For example, in walking or standing, the pressure borne by the lateral forefoot, the medial forefoot and the heel is different. The air cushion units 201 in the same area are connected to each other, so that the pressure can be transmitted and dispersed among the air cushion units 201. Taking walking as an example, at the moment when the foot lands, the lateral forefoot first touches the ground and bears a large impact force. If the air cushion units 201 are not connected, a single air cushion unit 201 can be excessively compressed, causing local pressure to be too large, thereby affecting comfort. The connected air cushion units 201 can disperse the impact force to the surrounding air cushion units 201, so that the entire lateral forefoot is uniformly pressed, and local pressure is prevented from being too high. The inflated air cushion unit 201 is elastic and can form a buffer between the foot bottom and the ground or the foot pedal fixing device; when the foot is stepped down, the air cushion unit 201 is compressed and rebounds quickly, like stepping on a spring, reducing the impact of the ground reaction force on the foot bottom and the joint, effectively reducing foot fatigue; since the air cushion units 201 are arranged in an array and connected in zones, they can better fit the natural contour of the foot bottom; the foot bottom of a person has different radii such as the arch, the forefoot and the heel, and the connected air cushion units 201 can deform according to the shape of the foot bottom, so that the foot bottom is in closer and more comfortable contact with the sensing mat. In addition, the connected design of the air cushion units 201 can also indirectly affect the friction; under the action of pressure, the connecting parts of the air cushion units 201 will form a small wrinkle or deformation area, increase the contact area with the foot bottom, and increase the friction to a certain extent to prevent sliding. For the sensing of foot bottom force information, the connected air cushion units 201 help to more accurately detect the pressure distribution, and the air cushion units 201 in each zone are connected to each other, so that the pressure is uniformly conducted among the air cushion units 201, and the signal detected by the air pressure sensor can better represent the pressure condition of the entire zone rather than the local pressure of a single air cushion unit 201.

[0051] Please refer to Figures 1-3 As an optional embodiment of the utility model, the spacing between the lateral forefoot air cushion area 21, the medial forefoot air cushion area 22 and the heel air cushion area 23 is adjustable.

[0052] It should be noted that the existing foot bottom pressure pad is mostly fixed in size, which cannot adapt to users with different foot lengths or arch heights, resulting in measurement errors (such as misalignment of the heel and the forefoot area). The adjustable spacing design ensures that the positions of the lateral forefoot, the medial forefoot and the heel air cushion area 23 adapt to different foot types, and ensures that the key stress points can be accurately measured by the sensor, thereby avoiding pressure misjudgment caused by misalignment of the partition.

[0053] As an optional embodiment of the utility model, the two air cushion layers 2 of the forefoot area can be fixed in position by means of knobs, buckles or negative pressure adsorption to prevent displacement during movement.

[0054] Please refer to Figures 1-3, as an optional embodiment of the utility model, the heel air cushion area 23 is integrally connected with the cushion base 1, the interval between the forefoot lateral air cushion area 21, the forefoot medial air cushion area 22 and the heel air cushion area 23 is adjustable;

[0055] And the cushion base 1 is provided with scale marks for adjusting the positions of the forefoot lateral air cushion area 21 and the forefoot medial air cushion area 22.

[0056] It should be noted that the cushion base 1 has the effect of improving the sealing of the heel air cushion area 23, and the forefoot lateral air cushion area 21 and the forefoot medial air cushion area 22 have their own independent sealing bottom layer; the scale marks, such as longitudinal scale marks, are marked on the surface of the cushion base 1, and the heel area is taken as the starting point to extend forward to mark the recommended position of the forefoot area (such as "35%-45% of the foot length" corresponding to the arch center); the fluorescent or raised marks are used to facilitate operation in dim environments. The present case integrally connects the heel air cushion area 23 with the cushion base 1 to avoid excessive shaking of the heel during exercise, reduce energy loss and fatigue; the interval between the forefoot lateral and medial air cushion areas is adjustable to adapt to different user foot types; the scale marks on the cushion base 1 enable users to accurately adjust the positions of the air cushion areas, and in combination with interval adjustment, the length of the foot length and the plantar force information sensing pad can be perceived by referring to the length adjustment table, the length of the plantar force information sensing pad is reasonably adjusted, in combination with the fixed heel air cushion area 23 and the scale mark design, an intuitive adjustment guide is provided to reasonably distribute the forefoot lateral air cushion area 21 and the forefoot medial air cushion area 22, ensure that the longitudinal center of the foot is aligned with the junction of the air cushion areas, and accurate measurement of the plantar pressure distribution by the air pressure sensor is realized, thereby improving the accuracy of pressure measurement; and users can quickly complete the adaptation according to the scale, reduce the repeated debugging time, and improve the ease of use of the equipment.

[0057] As an optional embodiment of the utility model, the forefoot lateral air cushion area 21, the forefoot medial air cushion area 22 and the heel air cushion area 23 are integrally connected with the cushion base 1, the junction center positions of the forefoot lateral air cushion area 21 and the forefoot medial air cushion area 22 and the heel air cushion area 23 are consistent with the longitudinal center position of the foot, and the forefoot lateral air cushion area 21 and the forefoot medial air cushion area 22 are symmetrically arranged.

[0058] It should be noted that if the plantar force information sensing mat adopts an adjustable partition design, the adjustment process will be tedious and prone to misplacement of the partitions due to improper user operation, thereby affecting the measurement accuracy. Especially in public places or rehabilitation institutions, frequent adjustment will increase the complexity of use and reduce efficiency. Therefore, in the case, by designing the air cushion area according to the maximum foot length (covering more than 95% of the user's foot type), the flexible material of the air cushion layer 2 naturally fits the foot curve. Even if the foot type is slightly smaller, the deformation of the flexible material can still ensure the effective measurement of the foot pressure by the sensor, avoiding data omission caused by fixed spacing. Thus, in terms of simplifying the operation process, the user does not need to manually adjust the position of the air cushion area, reducing human error and improving the ease of use of the equipment. In terms of improving measurement consistency, fixed spacing ensures uniform partition layout for each measurement, enhancing data comparability (such as comparative analysis of multiple training data), and reducing manufacturing costs by eliminating adjustment mechanisms (such as slides, buckles), simplifying the structural design, and improving product reliability.

[0059] The center line of the partition of the traditional device deviates greatly from the natural force center line of the foot, which causes the sensor to fail to accurately capture the real distribution of the key pressure points (such as the metatarsal bones and the heel), affecting the accuracy of gait analysis and rehabilitation training. In the case, the intersection center position of the lateral forefoot air cushion area 21, the medial forefoot air cushion area 22, and the heel air cushion area 23 is consistent with the longitudinal center position of the foot, so that each air cushion area covers the main biomechanical load area, thereby avoiding misplacement of the air cushion area and the pressure points due to foot placement deviation (such as slight internal and external rotation), and ensuring that the data reflects the real force situation.

[0060] Regarding the left-right symmetrical arrangement of the lateral forefoot air cushion area 21 and the medial forefoot air cushion area 22, an asymmetric partition design may lead to poor comparability of pressure data between the left and right feet, especially in mirror training, it is difficult to accurately compare the force differences between the affected side and the healthy side. Therefore, in the case, the lateral forefoot air cushion area 21 and the medial forefoot air cushion area 22 are arranged left-right symmetrically, so that the symmetrical layout can better capture the asymmetry of the left and right foot forces (such as inversion and eversion), providing a quantitative basis for rehabilitation training, and the pressure data of the left and right feet in the same symmetrical partition can be directly compared, reducing misjudgment caused by partition differences.

[0061] As an optional embodiment of the utility model, the circuit board includes a power supply circuit, a pre-conditioning circuit, an analog-to-digital conversion circuit, and a signal transmission module electrically connected.

[0062] Each of the air pressure sensors collects air pressure signals in the lateral forefoot air cushion area 21, the medial forefoot air cushion area 22, and the heel air cushion area 23, and transmits them to the display end through the signal transmission module (such as Bluetooth or wireless network) after processing by the circuit board.

[0063] It should be noted that the conventional pressure sensing system mostly uses wired transmission or complex data processing unit, resulting in heavy equipment and poor real-time performance, which is difficult to meet the needs of sports or rehabilitation scenes; while in this case, through integrated circuit design and wireless transmission module, efficient signal processing and low delay data transmission are realized to meet the real-time monitoring needs. In this case, lithium battery is used for power supply, fast charging is supported and the endurance time is long; the front-end conditioning circuit includes low-pass filter (cutoff frequency 100 Hz) and operational amplifier, which eliminates high-frequency noise and adapts the output range of the sensor. The analog-to-digital conversion circuit can use 16-bit ADC (such as ADS1115) with a sampling rate of 1 kHz to ensure data accuracy. The signal transmission module can use BLE 5.0 protocol with a transmission distance of ≥10 m, compatible with Apple and Android devices; the specific signal transmission processing direction is: sensor signal, front-end conditioning circuit, analog-to-digital conversion circuit, microcontroller, Bluetooth transmission to terminal display, and the display terminal is a display screen or a mobile phone or a computer. The 16-bit ADC resolution of the analog-to-digital conversion circuit can detect 0.1 kPa level pressure changes with high accuracy, and the wireless design eliminates the constraints of cables, making it suitable for dynamic scenes.

[0064] Please refer to Figures 1-3 , as an optional embodiment of the utility model, the front palm outside air cushion area 21, the front palm inside air cushion area 22 and the heel air cushion area 23 are connected with the corresponding air pressure sensor through flexible pipe 24 respectively.

[0065] It should be noted that the material of the flexible pipe 24 can be the same as that of the mat base 1, and the inner diameter of the flexible pipe 24 can be designed according to the connection requirements of the air pressure sensor and the gas flow to ensure smooth flow of the gas therein. At the same time, the pipe wall thickness should be moderate, which not only ensures sufficient strength to withstand the internal gas pressure, but also has a certain flexibility to adapt to different connection angles and position changes; the flexible pipe 24 can be laid along the edge or bottom or gap of the sensing mat which is not easily disturbed by external force; the flexible pipe 24 is sealed and connected with the air pressure sensor and the air cushion layer 2, effectively preventing external air interference and gas leakage, and ensuring the stability of the air pressure signal in the transmission process; stable air pressure signal helps the air pressure sensor to generate accurate electric signal, reduces the error that may be caused by signal fluctuation, and improves the reliability and accuracy of the whole system; the air pressure sensor is arranged on the outside of the mat base 1 to avoid being stepped on and damaged; the flexible pipe 24 can be designed to be detachably connected with the air pressure sensor, for example, the flexible pipe 24 is connected with the air pressure sensor through a quick plug connector or a threaded connection, so that the installation and maintenance are more convenient and fast. When the air pressure sensor needs to be replaced or the system needs to be checked and maintained, the flexible pipe 24 only needs to be simply detached and installed, without the need to disassemble the whole sensing mat, saving time and labor cost.

[0066] Please refer to Figure 2As an optional embodiment of the utility model, the air cushion unit 201 is a hemispherical shell structure.

[0067] It should be noted that if the air cushion unit 201 is a cubic or cylindrical structure, there are corners that are easy to form local high pressure points, resulting in measurement errors and foot discomfort, and making it difficult for regular geometric bodies to adapt to the foot bottom curve, reducing the contact area and data accuracy. In the present case, the hemispherical shell air cushion unit 201 is used to optimize the pressure distribution and deformation adaptability, improve the measurement accuracy and comfort. For example, the size of the hemispherical shell structure is 10-15mm in diameter and 3-5mm in height, taking into account sensitivity and structural strength, array arrangement, air cushion unit 201 center spacing 8-12mm, covering the key area of the foot bottom; the hemispherical surface disperses the pressure to the four corners, avoiding local stress concentration. The top of the air cushion unit 201 can be compressed vertically, and the side wall can be extended horizontally to adapt to the dynamic movement of the foot bottom. The air cushion unit 201 made of silicone material can be manufactured by injection molding process to ensure the sealing of the cavity. The outer surface of the air cushion unit 201 is added with microtexture (such as honeycomb concave-convex) to enhance the anti-skid performance.

[0068] Please refer to Figure 6 The utility model also provides a foot pedal fixing device which comprises the foot bottom force information sensing mat.

[0069] It should be noted that the foot bottom force information sensing mat is integrated in the foot pedal fixing device, and the bottom of the sensing mat is provided with magic tape, clamping groove or bolt hole for quick connection with the foot pedal main body 1001. The foot pedal fixing device is provided with a built-in power supply for supplying power to the foot bottom force information sensing mat, thereby reducing cable redundancy. The foot pedal fixing device can integrate pressure data and motion parameters (such as pedal frequency and power) to provide comprehensive training analysis.

[0070] Please refer to Figure 6 As an optional embodiment of the utility model, the foot pedal fixing device further comprises a foot pedal main body 1001 and a limiting adjustment assembly 2001.

[0071] The foot pedal main body 1001 is used for supporting the user's foot; the limiting adjustment assembly 2001 is used for adjusting the position of the foot on the foot pedal main body 1001, so that the intersection center position of the forefoot lateral air cushion area 21, the forefoot medial air cushion area 22 and the heel air cushion area 23 is consistent with the longitudinal center position of the foot on the foot pedal main body 1001; wherein the longitudinal direction of the foot is from the forefoot to the heel.

[0072] It should be noted that the foot longitudinal and transverse accurate positioning is realized by the limiting adjustment assembly 2001, so as to ensure that the key area of the foot bottom corresponds to each area of the air cushion layer 2, and the measurement reliability is improved. The user moves the foot to align the heel area with the heel air cushion area 23 of the sensing pad. The highest point of the arch (located at 35%-45% of the foot length) coincides with the center position at the junction of each air cushion area, so that the user can quickly position according to the foot length.

[0073] As an optional embodiment of the utility model, the limiting adjustment assembly 2001 includes a forefoot limiting part 20011, a heel limiting part 20012 and a length adjustment mechanism 20013;The forefoot limiting part 20011, the heel limiting part 20012 are slidably connected on the foot pedal main body 1001 along a first direction, and the first direction is the front-back direction of the foot on the foot pedal main body 1001;The length adjustment mechanism 20013 is connected with the foot pedal main body 1001 and the forefoot limiting part 20011, and is connected with the foot pedal main body 1001 and the heel limiting part 20012;The length adjustment mechanism 20013 is configured to adjust the position of the forefoot limiting part 20011 and the heel limiting part 20012 relative to the foot pedal main body 1001 to realize that the junction center position of the forefoot lateral air cushion area 21, the forefoot medial air cushion area 22 and the heel air cushion area 23 is consistent with the foot longitudinal center position on the foot pedal main body 1001;The length adjustment mechanism 20013 can realize the position adjustment of the forefoot limiting part 20011 and the heel limiting part 20012, for example, by gear and rack adjustment assembly, hydraulic adjustment assembly, screw adjustment assembly and the like;For example, the forefoot limiting part 20011 and the heel limiting part 20012 can realize position adjustment by connecting with the screw rod or telescopic drive of the foot pedal main body 1001. Or for example, the length adjustment mechanism 20013 includes a traction rope and a tightening mechanism, the traction rope passes through the foot pedal main body 1001 along the first direction and is connected with the forefoot limiting part 20011;The tightening mechanism is arranged on the foot pedal main body 1001 and connected with the traction rope, and the tightening mechanism is configured to tighten or loosen the traction rope.

[0074] As an optional embodiment of the utility model, the foot bottom force information sensing pad is fixed on the foot pedal main body 1001 by means of magic tape or screw or adhesion.

[0075] The utility model also provides a rehabilitation training instrument, including the foot pedal fixing device.

[0076] It should be noted that the conventional rehabilitation equipment (such as a treadmill, a balance training instrument, a lower limb joint training machine, a gait training machine, an elliptical machine, a spin bike or other equipment meeting the use requirements) lacks real-time monitoring function of plantar pressure and cannot provide quantitative training feedback for patients. Through the integration of the foot pedal fixing device in the rehabilitation training equipment, the present case realizes real-time collection and analysis of plantar force data during training to support the development of individualized rehabilitation programs. For example, the hardware layer includes: a plantar force information sensing pad, a foot pedal fixing device, and a master terminal (such as a touch screen). The software layer can include built-in algorithm analysis of pressure symmetry, peak distribution and dynamic change trend; so as to have various functions, such as real-time monitoring function: screen display of three-area pressure curve and heat map, support for abnormal posture (such as varus) alarm. Data storage function: cloud synchronization of training records for doctors to remotely assess rehabilitation progress. Interactive training function: game interface guides patients to adjust the power mode, and real-time guidance of users to adjust the posture through pressure data to accelerate the rehabilitation of neuromuscular.

[0077] As an optional embodiment of the present utility model, the rehabilitation training equipment further comprises a mirror training module, and the mirror training module comprises:

[0078] A data comparison submodule is in data connection or electrical connection with the two hardware collection units, and is used for receiving and comparing the air pressure signals of the left and right feet of the user in the forefoot lateral air cushion area, the forefoot medial air cushion area and the heel air cushion area;

[0079] A feedback signal generation submodule is in electrical connection with the data comparison submodule, and is used for generating a left and right foot pressure distribution difference signal according to the comparison result;

[0080] A display interface is in electrical connection with the feedback signal generation submodule, and is used for outputting the difference signal to an external display device to visually display the left and right foot pressure heat map and / or difference threshold prompt.

[0081] It should be noted that the conventional rehabilitation equipment can only display the plantar pressure of a single foot of a patient during training, and cannot compare the pressure difference between the left and right feet in real time, which leads to the following problems: first, the symmetry monitoring is missing, the patient cannot know whether the force of the two feet is balanced, and the wrong gait habit is easy to form; second, the feedback is not intuitive, the user needs to manually compare the data, and it is difficult to correct the training action in time; third, there is no early warning function, when the unilateral pressure is too large, the equipment cannot actively prompt, and there is a safety hazard.

[0082] In the mirror training module, the data comparison submodule is connected with two hardware acquisition units 3, and the pressure values of the left and right foot air cushion areas are received in real time, and the difference values at the same time point (such as 10 times per second) are calculated; the feedback signal generation submodule has a preset pressure difference threshold (for example, when the difference between the left and right feet exceeds 15%, it is triggered), and a prompt signal including 'normal', 'warning' and the like is generated according to the comparison result; the display interface converts the difference signal into a graphical instruction, which is transmitted to the display screen through HDMI or wireless transmission, and the left and right foot pressure distribution comparison graph is displayed; in the visual display scheme, for example, through the generation of a heat map, the pressure of the left and right foot air cushion area is represented by different colors (for example, red represents high pressure, and blue represents low pressure), and the two images are displayed side by side; and in the difference prompt aspect, when the pressure difference of a certain area exceeds the threshold, the corresponding position flashes a yellow frame or pops up a warning icon.

[0083] The hardware of the data comparison submodule may include, for example, a dual-core controller, a synchronous clock and a signal isolation circuit connected by electricity; the feedback signal generation submodule may include, for example, a voltage comparator, an adjustable resistor and a graphics processing chip connected by electricity; and the specific data signal transmission path is approximately air pressure sensor, signal conditioning circuit, analog-to-digital converter (ADC), dual-core controller (data comparison), threshold comparison unit (voltage comparator + adjustable resistor), heat map generation unit (graphics chip + video memory), and then transmitted to the display interface and the audible and visual alarm (buzzer + LED) at the same time.

[0084] In the above scheme, the user can simultaneously see the left and right foot pressure distribution comparison, quickly find the imbalance problem (such as excessive pressure on the left foot forefoot), distinguish the pressure size by color, and actively adjust the foot posture to make the colors on both sides of the heat map consistent, thereby improving the training accuracy; when the pressure of a certain area of a single foot continuously exceeds the set threshold, the device automatically issues a sound reminder or a vibration warning to prevent muscle strain; in addition, the difference data is directly displayed by graphics, without the need for manual calculation, thereby reducing the working intensity of the user.

[0085] In summary, the present application effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0086] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A foot pressure sensing pad, characterized in that, include: The mat base is made of a flexible material; An air cushion layer is disposed on the base of the mat, and the air cushion layer is at least divided into a forefoot outer air cushion area, a forefoot inner air cushion area and a heel air cushion area; the boundary line between the forefoot outer air cushion area and the forefoot inner air cushion area is close to or coincides with the center line of the longitudinal direction of the heel air cushion area. The hardware acquisition unit includes a controller, a circuit board, and multiple air pressure sensors for acquiring air pressure in the outer forefoot air cushion area, the inner forefoot air cushion area, and the heel air cushion area, respectively. The air pressure sensors and the controller are all electrically connected to the circuit board.

2. The plantar force sensing pad according to claim 1, characterized in that, The air cushion layer includes an array of air cushion units; The air cushion units in the outer forefoot air cushion area are interconnected, the air cushion units in the inner forefoot air cushion area are interconnected, and the air cushion units in the heel air cushion area are interconnected.

3. The plantar force sensing pad according to claim 1, characterized in that, The heel cushion area is integrally connected to the pad base, and the distance between the outer forefoot cushion area, the inner forefoot cushion area and the heel cushion area is adjustable.

4. The plantar force sensing pad according to claim 1, characterized in that, The outer forefoot air cushion area, the inner forefoot air cushion area, and the heel air cushion area are all integrally connected to the pad base. The center position of the junction of the outer forefoot air cushion area, the inner forefoot air cushion area, and the heel air cushion area is consistent with the longitudinal center position of the foot. The outer forefoot air cushion area and the inner forefoot air cushion area are arranged symmetrically on the left and right.

5. The plantar force sensing pad according to claim 1, characterized in that, The circuit board includes a power supply circuit, a pre-conditioning circuit, an analog-to-digital conversion circuit, and a signal transmission module electrically connected to it. Each of the air pressure sensors collects air pressure signals from the outer forefoot air cushion area, the inner forefoot air cushion area, and the heel air cushion area, and after processing by the circuit board, the signals are transmitted to the display terminal by the signal transmission module.

6. The plantar force sensing pad according to claim 1, characterized in that, The outer forefoot air cushion area, the inner forefoot air cushion area, and the heel air cushion area are each connected to the corresponding air pressure sensor via a flexible tube.

7. A foot pedal fixing device, characterized in that, Including the plantar force information sensing pad as described in any one of claims 1-6.

8. The foot pedal fixing device according to claim 7, characterized in that, The foot pedal fixing device also includes: The foot pedal body is designed to support the user's feet. A limit adjustment component is disposed on the foot pedal body. The limit adjustment component is configured to adjust the position of the foot on the foot pedal body so that the center position of the junction of the outer forefoot air cushion area, the inner forefoot air cushion area and the heel air cushion area is consistent with the longitudinal center position of the foot on the foot pedal body.

9. A rehabilitation training device, characterized in that, Includes the foot pedal fixing device as described in any one of claims 7-8.

10. The rehabilitation training device according to claim 9, characterized in that, It also includes a mirror training module, which comprises: The data comparison submodule is connected to the hardware acquisition unit of each foot pressure information sensing pad, and is used to receive and compare the air pressure signals of the user's left and right feet in the outer forefoot air pad area, the inner forefoot air pad area and the heel air pad area. The feedback signal generation submodule is electrically connected to the data comparison submodule and is used to generate a left and right foot pressure distribution difference signal based on the comparison result. The display interface is electrically connected to the feedback signal generation submodule and is used to output the difference signal to an external display device to visualize the pressure heat map of the left and right feet and / or the difference threshold prompt.

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