CN113616396A - Prosthetic Analysis System - Google Patents
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- CN113616396A CN113616396A CN202111015616.2A CN202111015616A CN113616396A CN 113616396 A CN113616396 A CN 113616396A CN 202111015616 A CN202111015616 A CN 202111015616A CN 113616396 A CN113616396 A CN 113616396A
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- 230000005021 gait Effects 0.000 claims abstract description 101
- 238000004891 communication Methods 0.000 claims abstract description 39
- 210000002683 foot Anatomy 0.000 claims description 68
- 238000012360 testing method Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 15
- 210000000459 calcaneus Anatomy 0.000 claims description 13
- 210000000474 heel Anatomy 0.000 claims description 12
- 210000000988 bone and bone Anatomy 0.000 claims 2
- 210000000548 hind-foot Anatomy 0.000 claims 1
- 239000010409 thin film Substances 0.000 claims 1
- 230000001953 sensory effect Effects 0.000 abstract 1
- 210000003414 extremity Anatomy 0.000 description 26
- 238000010586 diagram Methods 0.000 description 15
- 230000006698 induction Effects 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 210000000629 knee joint Anatomy 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006735 deficit Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005577 local transmission Effects 0.000 description 1
- 230000037230 mobility Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/50—Prostheses not implantable in the body
- A61F2/76—Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/1036—Measuring load distribution, e.g. podologic studies
- A61B5/1038—Measuring plantar pressure during gait
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
- A61B5/112—Gait analysis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/50—Prostheses not implantable in the body
- A61F2/76—Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
- A61F2002/7615—Measuring means
- A61F2002/7635—Measuring means for measuring force, pressure or mechanical tension
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
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- Surgery (AREA)
- Medical Informatics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
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Abstract
本申请公开了一种假肢分析系统。该假肢分析系统包括多个第一传感器，设置在一对下腿假肢的足底；多个第二传感器，设置在一对下腿假肢的接受腔内壁；主控芯片，分别与第一传感器、第二传感器通信连接，用于接收第一传感器采集到的第一传感数据和第二传感器采集到的第二传感数据，并通过第一传感数据确定下腿假肢的步态情况，通过第二传感数据确定在步态情况下接受腔的受力情况；终端设备，与主控芯片通信连接，用于显示步态情况和接受腔的受力情况。通过本申请，解决了相关技术中通过步态测量仪对假肢的功能进行测量，无法对下腿假肢所受压力和步态进行同步分析的问题。
The present application discloses a prosthetic analysis system. The prosthetic analysis system includes a plurality of first sensors, which are arranged on the soles of a pair of lower leg prostheses; a plurality of second sensors, which are arranged on the inner wall of the receiving cavity of the pair of lower leg prostheses; The sensor communication connection is used to receive the first sensing data collected by the first sensor and the second sensing data collected by the second sensor, and determine the gait condition of the lower leg prosthesis through the first sensing data, and use the second sensing data to determine the gait of the lower leg prosthesis. The sensory data determines the force of the receiving cavity under the condition of gait; the terminal device, communicated with the main control chip, is used to display the gait situation and the force of the receiving cavity. The present application solves the problem in the related art that the function of the prosthesis is measured by the gait measuring instrument, and the pressure and the gait of the lower leg prosthesis cannot be analyzed synchronously.
Description
Technical Field
The application relates to the technical field of artificial limb stress analysis, in particular to an artificial limb analysis system.
Background
The artificial limb is an essential life auxiliary article for the disabled, for example, the lower leg artificial limb is an essential life auxiliary article for the disabled with the missing lower leg, and in order to make the disabled with the missing lower leg more comfortable to wear and wear the artificial limb, gait measurement and analysis are required to be performed on the lower leg artificial limb.
The gait measuring instrument is large in size and single in function, synchronous analysis cannot be flexibly given to the pressure borne by the lower leg prosthesis and the reasonableness of instant gait matching, namely, the evaluation of the comfort level of the prosthesis in the related technology is not flexible and sufficient for the gait analysis.
Aiming at the problem that the function of the artificial limb can not be measured by a gait measuring instrument in the related technology, the pressure and the gait of the lower leg artificial limb can not be synchronously analyzed, an effective solution is not provided at present.
Disclosure of Invention
The application provides an artificial limb analysis system to solve the problem that the function of an artificial limb is measured through a gait measuring instrument in the related technology, and the pressure and the gait on a lower leg artificial limb cannot be analyzed synchronously.
According to one aspect of the present application, a prosthesis analysis system is provided. The prosthesis analysis system comprises: a plurality of first sensors provided on soles of a pair of lower leg prostheses; a plurality of second sensors provided on inner walls of the socket cavities of the pair of lower leg prostheses; the main control chip is respectively in communication connection with the first sensor and the second sensor and is used for receiving first sensing data acquired by the first sensor and second sensing data acquired by the second sensor, determining the gait condition of the lower leg artificial limb through the first sensing data and determining the stress condition of the socket cavity under the gait condition through the second sensing data; and the terminal equipment is in communication connection with the main control chip and is used for displaying the gait condition and the stress condition of the receiving cavity.
Optionally, the plurality of first sensors are disposed at least on the following parts of the sole of the foot: the posterior calcaneus part, the proximal phalanx part and the distal phalanx part.
Optionally, the plurality of second sensors are uniformly arranged on the inner wall of the receiving cavity.
Optionally, the system further comprises: and the input end of the data acquisition module is connected with the first sensor and the second sensor, and the output end of the data acquisition module is connected with the main control chip and used for preprocessing the first sensing data and the second sensing data and sending the preprocessed data to the main control chip.
Optionally, the system further comprises: the communication module is arranged between the main control chip and the terminal equipment, wherein the communication module at least comprises one of the following components: wireless communication module, wired communication module.
Optionally, each first sensor and each second sensor respectively collect the force of the corresponding sensing point, and the determining, by the main control chip, the gait condition of the lower leg prosthesis through the first sensing data includes: determining the gait condition as the heel touchdown stage of the testing foot under the conditions that the forces of a proximal phalanx sensing point and a distal phalanx sensing point of the non-testing foot reach the peak value and begin to be reduced, and the force of a heel bone sensing point of the testing foot begins to be stressed; when the attenuation amplitude of the stress of the proximal phalanx induction point and the distal phalanx induction point of the non-tested foot is larger than a preset value, the proximal phalanx induction point of the tested foot starts to bear the force, and the stress of the heel bone induction point of the tested foot reaches the peak value and starts to be reduced, the gait condition is determined as the touchdown stage of the heel and sole of the tested foot; determining the gait condition as the sole touchdown stage of the tested foot under the conditions that the heel bone induction point of the non-tested foot begins to bear force and the sole induction point of the tested foot rises in force; and determining the gait condition as the toe-touching stage of the test foot under the condition that the stress of each sensing point of the test foot gradually disappears when the non-test foot enters the heel-sole touching stage.
Optionally, the determining, by the master control chip, the stress condition of the socket in the gait condition by using the second sensing data includes: determining the stress value range corresponding to the induction point of each second sensor under each gait condition; and under the current gait condition, when the sensing point of the second sensor exceeds the range of the stress value corresponding to the current gait condition, determining that the sensing point of the second sensor is abnormally stressed.
Optionally, the first sensor and the second sensor are both film pressure sensors.
Optionally, the main control chip is an STM32H753IIK6 chip.
Optionally, the terminal device is a PC or a mobile terminal.
According to the application, a plurality of first sensors are arranged on the soles of a pair of lower leg artificial limbs; a plurality of second sensors provided on inner walls of the socket cavities of the pair of lower leg prostheses; the main control chip is respectively in communication connection with the first sensor and the second sensor and is used for receiving first sensing data acquired by the first sensor and second sensing data acquired by the second sensor, determining the gait condition of the lower leg artificial limb through the first sensing data and determining the stress condition of the socket cavity under the gait condition through the second sensing data; the terminal equipment is in communication connection with the main control chip and used for displaying the gait condition and the stress condition of the receiving cavity, and the problem that the function of the artificial limb can not be measured by the gait measuring instrument in the related technology, and the pressure and the gait on the lower leg artificial limb can not be analyzed synchronously is solved. The foot bottom stress of the lower leg artificial limb and the stress of the inner wall of the receiving cavity are analyzed to obtain the gait condition and the stress condition of the receiving cavity under the gait condition, so that the effect of synchronously analyzing the pressure applied to the knee joint of the artificial limb and the gait is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a prosthesis analysis system provided in accordance with an embodiment of the present application;
FIG. 2 is a graph of a characteristic of a pressure sensor provided in accordance with an embodiment of the present application;
FIG. 3 is a schematic diagram of a distribution of second sensors within a prosthetic socket provided in accordance with an embodiment of the present application;
FIG. 4 is a schematic diagram of a distribution of first sensors on the sole of a foot according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an alternative prosthesis analysis system provided in accordance with an embodiment of the present application;
FIG. 6 is a schematic diagram of a master control circuit provided in accordance with an embodiment of the present application;
FIG. 7 is a first schematic view of a gait situation provided according to an embodiment of the present application;
figure 8 is a schematic diagram of a second gait situation provided according to an embodiment of the application;
figure 9 is a third schematic representation of a gait situation provided according to an embodiment of the present application;
fig. 10 is a schematic diagram of a gait situation fourth provided according to an embodiment of the application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to solve the problem in the related art that the function of the prosthesis is measured by the gait measuring instrument, and the pressure and the gait suffered by the lower leg prosthesis cannot be analyzed synchronously, based on this, the present application is expected to provide a solution to the above technical problem, and the details of which will be explained in the following embodiments.
The embodiment of the disclosure provides a prosthesis analysis system. FIG. 1 is a schematic diagram of a prosthesis analysis system according to an embodiment. The prosthesis analysis system comprises:
the plurality of first sensors 101 are provided on soles of a pair of lower leg prostheses.
And a plurality of second sensors 102 disposed on the inner walls of the socket cavities of the pair of lower leg prostheses.
Specifically, the first sensor 101 and the second sensor 102 are used for measuring pressures applied to different contact areas of the lower leg prosthesis in different states during walking, and sending measured signals to the main control chip 103.
For example, the first sensor 101 and the second sensor 102 may be pressure sensors, and the pressure sensors convert pressure signals into resistance signals when receiving pressure, fig. 2 is a characteristic graph of the pressure sensor provided according to the embodiment of the present application, as shown in fig. 2, the resistance values of the pressure sensors are smaller when the pressure applied to the pressure sensors is larger, for example, when the pressures are respectively 10N, 20N, 30N, 40N, 55N, 80N, and 100N, the corresponding resistance values are continuously reduced and are respectively 480K Ω, 180K Ω, 100K Ω, 70K Ω, 53K Ω, 40K Ω, and 35K Ω. After obtaining the resistance signal, the pressure sensor converts the resistance signal into a voltage signal through an internal bridge circuit and an operational amplifier circuit, and sends the voltage signal to the main control chip 103.
In order to reduce the influence of the arrangement of the sensors on the comfort level of the user wearing the prosthesis during the measurement process, optionally, in the prosthesis analysis system provided in the embodiment of the present application, each of the plurality of first sensors 101 and the plurality of second sensors 102 is a film pressure sensor.
It should be noted that the positions and the number of the plurality of first sensors 101 and the plurality of first sensors 101 may be flexibly set, sensor point locations with different densities are set at different positions of the inner wall of the sole and the receiving cavity, and a sensor is set at each sensor point location, so that data under different spatial measurement resolutions can be obtained, thereby satisfying different measurement accuracy requirements.
The main control chip 103 is in communication connection with the first sensor 101 and the second sensor 102, and is configured to receive first sensing data collected by the first sensor 101 and second sensing data collected by the second sensor 102, determine a gait condition of the lower leg prosthesis through the first sensing data, and determine a stress condition of the socket under the gait condition through the second sensing data.
Specifically, the main control chip 103 determines the pressure conditions of each part of the sole and each part of the socket by acquiring the data acquired by each of the first sensor 101 and the second sensor 102 in real time, so as to determine the gait conditions and the stress conditions of the socket under different dynamic conditions, thereby realizing the synchronous analysis of the gait conditions and the stress conditions of the prosthetic knee joint.
The type of the main control chip 103 may be various, for example, it may be an STM32 series chip, and optionally, in the prosthesis analysis system provided in this embodiment of the application, the main control chip 103 is an STM32H753IIK6 chip.
And the terminal device 104 is in communication connection with the main control chip 103 and is used for displaying the gait condition and the stress condition of the socket.
The type of the terminal device 104 may be various, and optionally, in the prosthesis analysis system provided in the embodiment of the present application, the terminal device 104 is a PC or a mobile terminal.
Specifically, a client is installed on the PC or the mobile terminal, receives information sent by the main control chip 103 through the client, and displays the gait condition and the stress condition of the socket in a graphical manner.
The prosthesis analysis system provided by the embodiment of the application is arranged on soles of a pair of lower leg prostheses through a plurality of first sensors 101; a plurality of second sensors 102 provided on the inner walls of the socket cavities of the pair of lower leg prostheses; the main control chip 103 is in communication connection with the first sensor 101 and the second sensor 102 respectively, and is used for receiving first sensing data acquired by the first sensor 101 and second sensing data acquired by the second sensor 102, determining the gait condition of the lower leg prosthesis through the first sensing data, and determining the stress condition of the socket under the gait condition through the second sensing data; the terminal device 104 is in communication connection with the main control chip 103 and is used for displaying the gait condition and the stress condition of the receiving cavity, and the problem that the function of the artificial limb can not be measured by the gait measuring instrument in the related technology, and the pressure and the gait on the lower leg artificial limb can not be analyzed synchronously is solved. The foot bottom stress of the lower leg artificial limb and the stress of the inner wall of the receiving cavity are analyzed to obtain the gait condition and the stress condition of the receiving cavity under the gait condition, so that the effect of synchronously analyzing the pressure applied to the knee joint of the artificial limb and the gait is achieved.
In order to accurately acquire the pressure condition in the socket, optionally, in the prosthesis analysis system provided in the embodiment of the present application, the plurality of second sensors 102 are uniformly arranged on the inner wall of the socket.
In order to accurately analyze the gait condition, optionally, in the prosthesis analysis system provided in the embodiment of the present application, the plurality of first sensors 101 are disposed at least at the following positions on the sole of the foot: the posterior calcaneus part, the proximal phalanx part and the distal phalanx part.
Specifically, fig. 3 is a distribution schematic diagram of the first sensors 101 of the sole according to the embodiment of the present application, and as shown in fig. 3, a plurality of first sensors 101 are used to measure the pressure applied to different contact areas of the sole during the walking process of the stump, so as to determine the gait of the sole, for example, the gait is set at least at the parts with serious stress, such as the heel bone part, the proximal phalanx part, and the distal phalanx part of the sole, so that the gait support measured under different conditions is obviously different, and the gait condition obtained through analysis is more accurate.
Specifically, fig. 4 is a schematic distribution diagram of the second sensors 102 in the prosthetic socket, specifically a sectional view of the socket, provided according to the embodiment of the present application, in order to better detect the pressure generated by the residual limb to the socket, a plurality of second sensors 102 are uniformly installed on the inner wall of the prosthetic socket in a grouped distribution manner, for example, the grouped distribution manner may be to divide the second sensors 102 into 5 groups, and each group of second sensors 102 is circumferentially attached to the inner wall of the socket in a linear arrangement manner.
In order to facilitate the analysis of the data by the main control chip 103, optionally, in the prosthesis analysis system provided in this embodiment of the present application, the system further includes: and the input end of the data acquisition module is connected with the first sensor 101 and the second sensor 102, and the output end of the data acquisition module is connected with the main control chip 103, and is used for preprocessing the first sensing data and the second sensing data and sending the preprocessed data to the main control chip 103.
Specifically, the first sensing data and the second sensing data are analog signals, and the preprocessing may include filtering and converting, filtering noise data in the first sensing data and the second sensing data, converting the filtered data into digital signals, and sending the digital signals to the main control chip 103.
In order to implement communication between the main control chip 103 and the terminal device 104, optionally, in the prosthesis analysis system provided in this embodiment of the application, the system further includes: a communication module, disposed between the main control chip 103 and the terminal device 104, wherein the communication module at least includes one of the following: wireless communication module, wired communication module.
Specifically, the wired communication module may be a main communication module, the wireless communication module is a standby communication module, and when the main communication module fails, the standby communication module is switched to, so that stability of communication between the main control chip 103 and the terminal device 104 is ensured.
Fig. 5 is a schematic diagram of an alternative prosthesis analysis system provided according to an embodiment of the present application, in this embodiment, the system is composed of a first sensor 102, a second sensor 103, a main control circuit, and a terminal device 104. The main control circuit is a schematic diagram of the main control circuit, and as shown in fig. 6, the main control circuit is in communication connection with the first sensor 101 and the second sensor 102 respectively, and is configured to receive the first sensing data acquired by the first sensor 101 and the second sensing data acquired by the second sensor 102, determine a gait condition of the lower leg prosthesis according to the first sensing data, and determine a stress condition of the receiving cavity under the gait condition according to the second sensing data.
The data acquisition module in the main control circuit part may be a 32-channel ADC conversion circuit, and is configured to perform analog-to-digital conversion on the real-time voltage signal acquired by the sensor, convert the analog signal into a digital signal, and input the digital signal into the main control chip 103 for processing.
The main control chip 103 can be an STM32H753IIK6 chip, and the power module is used for continuously providing stable voltage for the main control chip 103. Specifically, the power module may include a power supply and a voltage conversion module, for example, the power supply may supply power to the USB, the charging circuit and the external battery, and the voltage conversion module may be a TPS63060 chip, and perform voltage stabilization and voltage conversion through the TPS63060 chip, so as to provide a stable voltage of 3.3V or 5V for the main control chip 103.
When the main control chip 103 communicates with the terminal device 104, a communication connection may be established with the terminal device 104 in a wireless manner or a local transmission manner, so as to transmit data and information, where the wireless manner may be a wireless communication manner such as WIFI, bluetooth, 3G, 4G, and the like. Specifically, a communication module may be used to be in communication connection with the terminal device 104, the communication module may be a local communication module CP2104 or a wireless communication module HC-12, and the two communication modules may transmit the synchronous gait information collected by the main control chip 103 to the terminal device 104 in a local connection manner or a wireless manner.
Optionally, in the prosthesis analysis system provided in this embodiment of the application, each first sensor 101 and each second sensor respectively collect a force of a corresponding sensing point, and the main control chip 103 determines the gait condition of the lower leg prosthesis according to the first sensing data, including: determining the gait condition as the heel touchdown stage of the testing foot under the conditions that the forces of a proximal phalanx sensing point and a distal phalanx sensing point of the non-testing foot reach the peak value and begin to be reduced, and the force of a heel bone sensing point of the testing foot begins to be stressed; when the attenuation amplitude of the stress of the proximal phalanx induction point and the distal phalanx induction point of the non-tested foot is larger than a preset value, the proximal phalanx induction point of the tested foot starts to bear the force, and the stress of the heel bone induction point of the tested foot reaches the peak value and starts to be reduced, the gait condition is determined as the touchdown stage of the heel and sole of the tested foot; determining the gait condition as the sole touchdown stage of the tested foot under the conditions that the heel bone induction point of the non-tested foot begins to bear force and the sole induction point of the tested foot rises in force; and determining the gait condition as the toe-touching stage of the test foot under the condition that the stress of each sensing point of the test foot gradually disappears when the non-test foot enters the heel-sole touching stage.
Specifically, fig. 7, 8, 9 and 10 are schematic illustrations of a support phase gait scenario in which the left foot is the test foot and the right foot is the non-test foot.
Fig. 7 is a schematic diagram of a gait condition i provided according to an embodiment of the present application, that is, a schematic diagram of a force applied to a foot during a heel strike phase in a normal gait support phase, in which the forces of sensing points near a proximal phalanx and a distal phalanx of a non-test foot reach a peak value and begin to decrease, a force is applied to a sensing point (No. 8) of a heel bone after the test, and a body center of gravity is located at a distal phalanx of the non-test foot, so that a preliminary alternation of both feet is started.
Fig. 8 is a second schematic gait condition diagram according to the embodiment of the application, that is, during the heel sole touchdown stage in the normal gait support phase, the body center of gravity starts to move forward during this time period, the stress of the sensing points near the proximal phalanx and the distal phalanx of the non-test foot starts to be greatly reduced and enters the swing period, the sensing point (No. 2) at the proximal phalanx of the test foot starts to be stressed, the stress of the sensing point (No. 8) of the heel bone reaches the peak value and starts to be reduced, during this time period, the transition from the heel stress of the test foot to the sole stress is completed, during this time period, the body center of gravity is at the test foot, and the alternation of both feet is completed.
Figure 9 is a third schematic representation of a gait scenario according to an embodiment of the present application, namely, the ball of the foot during the support phase of a normal gait, during which time the swing phase of the untested foot is completed and the heel strike phase is entered, the force applied to the ball of the tested foot rises slowly, the body's center of gravity is between the feet, and the feet begin to alternate.
Figure 10 is a fourth example of a gait pattern provided in accordance with an embodiment of the present application, namely, a toe-strike phase during normal gait support phase when the non-test foot enters the heel-and-sole-strike phase and the test foot is about to leave the ground for swing phase, ending the alternation of both feet.
It should be noted that the above four phases are collectively referred to as a support phase load bearing phase, after the load bearing phase is finished, the support termination phase of the termination phase is entered, the support termination phase is equivalent to the initial contact phase of the other foot, the support phase load bearing phase of the other foot is started, after the support phase is passed, the support phase enters the swing phase, and they are alternated to form a complete gait.
In addition, it should be noted that, for the patient with mobility impairment, the gait sensed by the plantar pressure is different from that of the normal person, so that for different people, the dyssynchrony sensed by the plantar pressure can be used to analyze what obstacles exist in the walking process of the patient.
Optionally, in the prosthesis analysis system provided in the embodiment of the present application, the determining, by the main control chip 103, the stress condition of the socket under the gait condition according to the second sensing data includes: determining the stress value range corresponding to the induction point of each second sensor 102 under each gait condition; under the current gait condition, when the sensing point of the second sensor 102 exceeds the range of the stress value corresponding to the current gait condition, it is determined that the stress of the sensing point of the second sensor 102 is abnormal.
Specifically, since the range of the stress value corresponding to the sensing point of each second sensor 102 under various gait conditions in one support phase is already determined, the main control chip 103 can determine the stress condition of the socket under different gait conditions, and determine whether the stress condition of the socket is abnormal in real time during the exercise process.
For example, in the current gait condition, when the sensing point of the second sensor 102 does not exceed the range of the stress value corresponding to the current gait condition, it is determined that the stress of the sensing point of the second sensor 102 is normal, and when the sensing point of the second sensor 102 exceeds the range of the stress value corresponding to the current gait condition, it is determined that the stress of the sensing point of the second sensor 102 is abnormal, and real-time feedback is performed through the terminal device 104.
Through the embodiment, the synchronous analysis of the stress condition of the knee joint of the artificial limb and the gait condition in motion is realized, so that data support is provided for improving the coordination of all parts of the artificial limb and improving the comfort level of a user wearing the artificial limb.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
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| CN119564192A (en) * | 2024-11-27 | 2025-03-07 | 北京航空航天大学 | Design and preparation method of flexible sensing array for plantar pressure monitoring |
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