WO2019022533A1 - Système de chaussures intelligentes pour déterminer l'état de marche d'un porteur - Google Patents

Système de chaussures intelligentes pour déterminer l'état de marche d'un porteur Download PDF

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Publication number
WO2019022533A1
WO2019022533A1 PCT/KR2018/008466 KR2018008466W WO2019022533A1 WO 2019022533 A1 WO2019022533 A1 WO 2019022533A1 KR 2018008466 W KR2018008466 W KR 2018008466W WO 2019022533 A1 WO2019022533 A1 WO 2019022533A1
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WIPO (PCT)
Prior art keywords
information
state
pressure
wearer
peak value
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PCT/KR2018/008466
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English (en)
Korean (ko)
Inventor
조강희
박종현
김수빈
Original Assignee
충남대학교 산학협력단
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Publication of WO2019022533A1 publication Critical patent/WO2019022533A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A43B3/34—Footwear characterised by the shape or the use with electrical or electronic arrangements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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, mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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, mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114—Tracking parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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, mobility of a limb
    • A61B5/1118—Determining activity level
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording 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, mobility of a limb
    • A61B5/1121—Determining geometric values, e.g. centre of rotation or angular range of movement
    • A61B5/1122—Determining geometric values, e.g. centre of rotation or angular range of movement of movement trajectories

Definitions

  • the present invention relates to a smart shoe system for determining a walking state of a wearer, and more particularly to a smart shoe system for determining a walking state of a wearer based on pressure information sensed during walking of a wearer.
  • the healthcare industry is an overall healthcare business, collectively referred to as disease prevention, management, remote screening, and visiting health consulting as well as existing simple treatment services.
  • smart clothing and smart shoes that can accurately check various bio-signals and health information of people in daily life without visiting a medical institution Is being developed.
  • Conventional smart shoes have an insole including a pressure sensor, and can transmit information on the wearer's weight, center of gravity information, and movement to a smartphone.
  • Korean Patent Registration No. 10-2013-0147208 discloses an invention relating to a shoe with a plurality of pressure sensors, which measures the pressure generated when a person walked and predicts a walking condition based on the measured pressure.
  • the present invention calculates trajectory information for a continuous center of pressure of a step of a wearer based on pressure information sensed by a smart shoe and determines a walking state of the wearer based on the calculated trajectory information And a smart shoes system.
  • force variation information indicating force of each sensing point during a plurality of sensing points is detected based on pressure information sensed by a smart shoes, and force variation information indicating a maximum pressure at each sensing point
  • the present invention provides a smart shoes system that calculates maximum pressure variation information and determines a walking state of a wearer based on trajectory information, force variation information, and maximum pressure variation information of a wearer's step.
  • a smart shoes system includes a plurality of sensors for sensing pressure by the sole of a wearer, and transmits the sensed pressure information to an electronic device Based on the pressure information received from the smart shoes and the smart shoes, calculates trajectory information about successive pressure points of the wearer's step of the center of pressure, and calculates a walking state of the wearer based on the trajectory information And an electronic device for judging.
  • the electronic device determines the walking state of the wearer based on at least one of the length of the trajectory of the pressure center and the position of the trajectory of the pressure center relative to the smart shoes during the step of the wearer among the locus information .
  • the electronic device may determine that the walking state of the wearer is in a standing state when the length of the trajectory of the pressure center is less than a predetermined first length, and if the length of the trajectory of the pressure center is less than the predetermined first length
  • the walking state of the wearer is determined to be in a state of climbing the stairs, and if the length of the locus of the pressure center is greater than or equal to the predetermined second length,
  • the walking state of the wearer can be changed to a state of lowering the stairs.
  • the pressure information received from the smart shoes includes a plurality of sensed points of time and pressure information sensed by the plurality of sensors for each of the plurality of sensed points of time
  • the electronic device is configured to determine, based on the pressure information received from the smart shoes
  • the first information indicating the force of each sensing point during the plurality of sensing points may be calculated and the walking state of the wearer may be determined based on the trajectory information of the step of the wearer and the first information
  • the apparatus is characterized in that the walking state of the wearer is a standing state or a walking state, a state of climbing a staircase, a state of descending a staircase, and a state of running, based on a length of a trajectory of the pressure center during the step of the wearer among the locus information Can be determined.
  • the electronic device may calculate second information indicative of a maximum pressure at each sensing point during the plurality of sensed points of time, and may determine the state of walking, the state of ascending the stairs based on the first information and the second information, And a state of going down the stairs and a state of running.
  • the first information increases as the time elapses during the step of the wearer, and the force increases to the first peak value
  • Decreasing from the third value to the second peak value, decreasing again from the second peak value, and decreasing from the walking state, the stepping up state, or the stepping down state to the second Information increases as the time elapses during the wearer's step until the eleventh peak value, decreases from the eleventh peak value to the thirteenth value, increases from the thirteenth value back to the twelfth peak value
  • the first information is decreased from the twelfth peak value, and in the running state, as the time passes during the step of the wearer, Wherein the second information in the running state is increased to a peak value as time elapses during the wearer's step and decreases from the one peak value to a second peak value
  • the electronic device determines that the wearer's walking state is in a state of lowering the step if the first peak value is greater than the second peak value by a predetermined first magnitude or more and the difference between the eleventh peak value and the thirteenth value Determining that the wearer is in a state of climbing up the stairs if the force is equal to or less than a predetermined second size and if the force has only one peak value or if the peak value of the pressure is equal to or greater than the fourth value and only one peak value exists It is possible to determine the walking state of the wearer as the running state.
  • the electronic device may determine the walking speed of the wearer based on a difference between one of the first peak value and the second peak value and the third value.
  • the electronic device may calculate the force by weighting the pressure values sensed by the plurality of sensors at respective sensing points during the plurality of sensed points of time, by weighting the sensed pressure points with the size of the area in which the sensors are disposed.
  • the smart shoe system determines the walking state of the wearer based on the trajectory information about the pressure center, so that the wearer's walking state is in a standing state, a walking state, It is possible to judge which of the state of going down the stairs and the state of running.
  • the smart shoes system determines the walking state of the wearer by considering not only the trajectory information but also the force variation information and the maximum pressure variation information, Can be improved.
  • FIG. 1 is a view for explaining a smart shoes system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram for explaining a smart shoe according to an embodiment of the present invention.
  • 3A and 3B are views showing a sensor unit according to an embodiment of the present invention.
  • FIG. 4 is a block diagram for explaining an electronic device according to an embodiment of the present invention.
  • FIGS. 5A to 5E are diagrams showing the locus information of the pressure center according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating fastness information for each walking speed according to an embodiment of the present invention.
  • Fig. 7 is a view showing the values of the y-axis in Fig. 6, respectively.
  • FIG. 9 is a view illustrating fast-change information according to a walking state according to an embodiment of the present invention.
  • Fig. 10 is a view of the y-axis in Fig.
  • FIG. 11 is a view showing maximum pressure variation information according to a walking state according to an embodiment of the present invention.
  • 12A and 12B are views showing fastness variation information and maximum pressure variation information according to various walking states according to an embodiment of the present invention.
  • FIGS. 13A to 13C are views for distinguishing a state of climbing a staircase and a state of descending a staircase according to another embodiment of the present invention.
  • FIG. 14 is a view showing information on a value obtained by dividing force variation information by body weight in a running state according to another embodiment of the present invention.
  • the smart shoe system 1000 includes a smart shoe 100 and an electronic device 200.
  • the smart shoe 100 may include a plurality of sensors for sensing pressure by the soles of the wearer and may transmit sensed pressure information to the electronic device 200.
  • the smart shoe 100 may sense pressure on the left soles and the right soles, respectively.
  • the smart shoes 100 may sense pressure on a plurality of regions such as the pressure of the toe portion and the pressure of the heel portion with respect to the soles of the soles of the left soles and the right soles.
  • the smart shoes 100 may transmit information sensed by the plurality of sensors to the electronic device 200.
  • the smart shoe 100 may transmit information sensed by a plurality of sensors to the electronic device 200 in real time.
  • the smart shoe 100 may transmit information sensed by the plurality of sensors to the electronic device 200 at predetermined time intervals.
  • the smart shoe 100 may store information sensed before transmitting the information to the electronic device 200.
  • the smart shoe 100 may transmit information about a plurality of sensed points of time during the step of the wearer and pressure information sensed by the plurality of sensors for each of the plurality of sensed points of time to the electronic device 200.
  • the electronic device 200 is an apparatus configured to perform an operation and may be a device such as a tablet personal computer (PC), a personal digital assistant , A smart phone, a mobile phone, and the like.
  • PC personal computer
  • a smart phone smart phone
  • mobile phone and the like.
  • the electronic device 200 calculates the trajectory information for a continuous center of pressure of the wearer's step based on the pressure information received from the smart shoe 100. Based on the trajectory information, Can be determined.
  • the smart shoe 100 may include a sensor unit 110, a storage unit 120, a communication unit 130, and a control unit 140.
  • the sensor unit 110 may include a plurality of sensors.
  • the sensor unit 110 will be described in detail with reference to FIGS. 3A and 3B.
  • FIG. 3A and 3B The sensor unit 110 will be described in detail with reference to FIGS. 3A and 3B.
  • the smart shoe 100 may include a sensor portion 110 as a sole portion.
  • the sensor unit 110 formed on the sole may include a plurality of sensors.
  • the plurality of sensors may be disposed on the same plane as the sole of the smart shoe 100.
  • a plurality of sensors are shown as being provided in the entire area of the sole, but this is only an example.
  • a plurality of sensors may be five, and five sensors may be disposed only in important areas such as the toe and the heel.
  • a plurality of sensors for the left foot are shown in Fig. 3A, a plurality of sensors arranged symmetrically on the right foot may also be provided.
  • the plurality of sensors can sense the pressure caused by the sole of the wearer. Pressure may vary in the detailed areas of the wearer ' s soles, and the results detected by multiple sensors may be different.
  • FIG. 3B is an example of a result of sensing pressure by the wearer's sole. The higher the pressure, the larger the value, and some edges show that the pressure is not detected.
  • the storage unit 120 may store information sensed by the sensor unit 100. [ For example, the storage 120 may store the sensed information until the information sensed by the sensor unit 100 is transmitted to the electronic device 200.
  • the storage 120 may be implemented in various forms such as a RAM, a ROM, and the like, and the storage 120 may be configured to store sensed information.
  • the communication unit 130 is configured to perform communication with various types of external devices according to various types of communication methods.
  • the communication unit 130 may include a Wi-Fi chip, a Bluetooth chip, a wireless communication chip, an NFC chip, and the like.
  • the control unit 140 may transmit the sensed information to the electronic device 200 through the communication unit 130.
  • the Wi-Fi chip and the Bluetooth chip communicate with each other using the WiFi method and the Bluetooth method, respectively.
  • various connection information such as an SSID and a session key may be transmitted and received first, and communication information may be used to transmit and receive various information.
  • the wireless communication chip refers to a chip that performs communication according to various communication standards such as IEEE, zigbee, 3G (3rd Generation), 3rd Generation Partnership Project (3GPP), LTE (Long Term Evolution)
  • the NFC chip refers to a chip operating in an NFC (Near Field Communication) system using 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860 to 960 MHz, and 2.45 GHz.
  • the communication unit 130 can perform unidirectional or bi-directional communication with the electronic device 200.
  • the communication unit 130 may transmit a signal to the electronic device 200.
  • the communication unit 130 may receive a signal from the electronic device 200 or may transmit the signal to the electronic device 200.
  • the controller 140 controls the operation of the smart shoe 100 as a whole.
  • the controller 140 may be implemented as a processor, a Micom, and an AP (application processor).
  • the control unit 140 may store the information sensed by the sensor unit 110 in the storage 120.
  • the control unit 140 may transmit the information stored in the storage 120 to the electronic device 200 through the communication unit 130.
  • the control unit 140 may transmit the information sensed by the sensor unit 110 to the electronic device 200 in real time.
  • the control unit 140 may divide the pressure information according to a plurality of steps of the left foot and the right foot of the wearer and transmit them to the electronic device 200.
  • the controller 140 may transmit the pressure information sensed by the plurality of sensors to the electronic device 200 at a plurality of sensing points and a plurality of sensing points.
  • the controller 140 may store the magnitude of pressure sensed by each sensor and the time information.
  • the control unit 140 may store the pressure 50 of the first sensor and the time 12:05 AM when the pressure is measured.
  • the control unit 140 may transmit the magnitude of the pressure sensed by each sensor and the time information to the electronic device 200.
  • the control unit 140 may transmit the length information of the smart shoe 100 to the electronic device 200 in addition to the sensed information.
  • the length information of the smart shoe 100 may be stored in the storage 120 at the time of manufacture of the smart shoe 100.
  • the controller 140 may transmit the length information of the smart shoe 100 only once at the initial point of time when the controller 140 is interlocked with the electronic device 200.
  • the electronic device 200 may include a communication unit 210, a storage 220, and a control unit 230.
  • the communication unit 210 is configured to perform communication with various types of external devices according to various types of communication methods.
  • the communication unit 210 may include a Wi-Fi chip, a Bluetooth chip, a wireless communication chip, an NFC chip, and the like.
  • the control unit 230 can receive the information sensed from the smart shoes 100 and the length information of the smart shoes 100 through the communication unit 210.
  • the Wi-Fi chip and the Bluetooth chip communicate with each other using the WiFi method and the Bluetooth method, respectively.
  • various connection information such as an SSID and a session key may be transmitted and received first, and communication information may be used to transmit and receive various information.
  • the wireless communication chip refers to a chip that performs communication according to various communication standards such as IEEE, zigbee, 3G (3rd Generation), 3rd Generation Partnership Project (3GPP), LTE (Long Term Evolution)
  • the NFC chip refers to a chip operating in an NFC (Near Field Communication) system using 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860 to 960 MHz, and 2.45 GHz.
  • the communication unit 210 may perform unidirectional or bidirectional communication with the smart shoe 100.
  • the communication unit 210 may transmit a signal to the smart shoe 100.
  • the communication unit 210 may receive a signal from the smart shoe 100 or transmit the signal to the smart shoe 100.
  • the storage 220 may store pressure information received from the smart shoe 100.
  • the storage 220 may include a method for calculating the locus information for the center of pressure from the received pressure information, a method for calculating force variation information, and a method for calculating maximum pressure variation information And a method of determining the walking state of the wearer.
  • the storage 220 may be implemented in various forms, such as a RAM, a ROM, and the like, and is not limited as long as it can store received information.
  • the control unit 230 controls the operation of the electronic device 200 as a whole.
  • the controller 230 may be implemented as a processor, a Micom, and an AP (application processor).
  • control unit 230 may calculate the trajectory information about the pressure center continuously with respect to the wearer's step, based on the pressure information received from the smart shoe 100.
  • the pressure information received from the smart shoes 100 may include pressure information sensed by a plurality of sensors for each of a plurality of sensing points and a plurality of sensing points.
  • the smart shoe 100 has 30 sensors sensing pressure at intervals of 1 second, a total of 30 pressure values sensed from each sensor per second may be generated as pressure information. If the pressure is sensed for 10 seconds, pressure information including a total of 300 pressure values can be generated. The electronic device 200 receives this and the control unit 230 can calculate the pressure center from the 30 pressure values sensed for the first second. Then, the controller 230 can calculate the pressure center from the 30 pressure values sensed for the next one second. The control unit 230 repeats the above procedure for data for a total of 10 seconds, and finally calculates 10 pressure centers. The ten pressure centers can form one trajectory.
  • the method of calculating the pressure center is well known and a detailed description thereof will be omitted.
  • the control unit 230 can determine the wearer's walking state based on the locus information.
  • the controller 230 may determine the wearer's walking condition based on at least one of the length of the trajectory of the pressure center during the wearer's step of the trajectory information and the position of the trajectory of the pressure center relative to the smart shoe 100 .
  • the controller 230 may average a plurality of consecutive pressure centers for a plurality of left steps of the wearer on the basis of the pressure information received from the smart shoes 100 to calculate average locus information about the pressure center with respect to the left foot of the wearer And averages a plurality of consecutive pressure centers for a plurality of right steps of the wearer based on the pressure information received from the smart shoes 100 to calculate average trajectory information for the pressure center of the wearer's right foot The average trajectory information about the center of pressure on the left foot, and the average trajectory information on the center of pressure on the right foot.
  • control unit 230 may calculate the center of pressure at each sensing point during a plurality of sensing points, and calculate the locus information based on the calculated pressure center.
  • the control unit 230 receives the length information of the smart shoes 100 from the smart shoes 100 and calculates a walking state of the wearer based on the ratio of the length of the trajectory of the pressure center and the length information of the smart shoes 100 You can judge.
  • the controller 230 can determine the wearer's walking state to be standing.
  • this is merely an example, and the numerical value can be changed as much as possible.
  • control unit 230 may further determine the walking state of the wearer by considering the force variation information and the maximum pressure variation information.
  • control unit 230 the operation of the control unit 230 will be described in detail with reference to the drawings.
  • FIGS. 5A to 5E are diagrams showing the locus information of the pressure center according to an embodiment of the present invention. More specifically, FIG. 5A shows a standing state, FIG. 5B shows a walking state, FIG. 5C shows a stair climbing, FIG. 5D shows a stair descending state, (20), (20), and (20). That is, even if the wearer is different, it can be seen that there is a tendency for each of the standing state, the walking state, the stair climbing state, the stair climbing state, and the running state.
  • the controller 230 can determine the wearer's walking state based on at least one of the length of the trajectory of the pressure center during the wearer's step of the trajectory information and the position of the trajectory of the pressure center relative to the smart shoe 100 have.
  • the control unit 230 determines that the wearer's walking state is in the standing state, and if the length of the trajectory of the pressure center is not less than a predetermined first length, If the length of the trajectory of the pressure center is greater than or equal to the predetermined second length, it is possible to determine the wearer's walking state to be in a walking state or running state.
  • the control unit 230 controls the starting point of the trajectory of the pressure center and the first distance between the start point of the pressure center and the corresponding first end of the smart shoe 100 in either the standing state,
  • the walking state of the wearer can be changed to a state of lowering the stairs if the second distance between the end of the locus of the pressure center and the corresponding second end of the smart shoe 100 is greater than a predetermined size.
  • control unit 230 may first determine the state of descending the stairs, and may distinguish the standing state, the walking state, the climbing state, and the running state when the climbing state is not the descending state.
  • the controller 230 can determine the state of going down the stairs by using another method. For example, the control unit 230 may compare the distance from the toe end of the smart shoe 100 to both ends of the trajectory information to determine whether it is in a state of going down the stairs.
  • the state of walking, the state of climbing stairs, and the state of running can be ambiguous. Also, the state of going down the stairs can be difficult to clearly distinguish from the state of walking or going up the stairs. That is, when the control unit 230 uses only the trajectory information, there is a possibility that an error will occur depending on the wearer.
  • the controller 230 may further use the force variation information and the maximum pressure variation information.
  • the force variation information may be a force at each sensing point during a plurality of sensing points
  • the maximum pressure variation information may be the maximum pressure at each sensing point during a plurality of sensing points.
  • FIG. 6 is a view showing the relevance information according to an embodiment of the present invention. Specifically, Fig. 6 is a result of measurement of the force variation when the treadmill speeds are 20, 30, 30, and 20 km, respectively, at the speeds of 2, 3, 4, 5 and 6 km / h.
  • the heel of the left foot touches the floor first, and the right foot may be at the moment when it is about to fall from the ground. Accordingly, the weight may be dispersed and the pressure sensed near the heel of the left foot may be low. However, as the right foot gradually falls from the ground and the area of the wearer's left foot touches the ground, the weight of the left foot is increased. As a result, the pressure sensed on the left foot can be increased. Thereafter, when the right foot falls from the ground, and the entire surface of the left foot touches the floor, the weight of the wearer is dispersed to the foot area, so that the pressure can instantaneously be reduced. The pressure from the left foot may increase until the heel of the left foot falls back and the heel of the right foot touches the floor. Thereafter, when the heel of the right foot touches the floor and the weight is dispersed, the pressure of the left foot may gradually decrease.
  • the axis obtained by converting a stance time of the wearer to 100 in the above walking motion is the x-axis in Fig. That is, the x-axis is 0 when the heel touches the ground, and the moment when the toe falls from the ground is 100.
  • the y-axis in Fig. 6 represents the ratio of the force at each time point to the maximum force during one step.
  • the control unit 230 can calculate the force by weighting the pressure values sensed by the plurality of sensors at the respective sensing points during the plurality of sensing points by the size of the area in which the respective sensors are disposed. That is, the force at each point can be expressed by the following equation.
  • the smart shoe 100 may include 99 sensors, and the force can be calculated by multiplying the measured pressure value at each sensor by the area occupied by each sensor, and summing the multiplied results.
  • FIG. 6 is a graph showing averaged measured data for five minutes of each of 20 persons in the above-described manner and cumulatively averaging the average values again.
  • FIG. 7 is a view in which the value of the y-axis is changed in FIG. Specifically, FIG. 7 shows a value obtained by dividing the unit of the force calculated from the above into N kgf and the weight of the wearer on the y axis. In this case, the y value temporarily exceeds 1, indicating that more force is applied than the weight of the wearer.
  • FIG. 8 is a view showing maximum pressure variation information according to an embodiment of the present invention.
  • FIG. First a method of calculating maximum pressure variation information will be described.
  • the controller 230 may calculate maximum pressure variation information indicating a maximum pressure of each sensing point during a plurality of sensing points.
  • smart shoes 100 may include 99 sensors that sense pressure at 0.02 second intervals.
  • the electronic device 200 may receive 99 pressure values sensed at intervals of 0.02 seconds from the smart shoe 100.
  • the control unit 230 may determine the maximum value among the 99 pressure values at the same measurement time point and may calculate the maximum pressure variation information including the largest pressure value at all measurement points.
  • FIG. 9 is a view showing 20 pieces of strength information according to an embodiment of the present invention.
  • Fig. 9 shows a state in which the vehicle is running at 2km / h, 3km / h, 4km / h, 5km / h, 6km / h, 6km / h, 7km / h, 8km / h, 9km /
  • the measured data are averaged over the five minutes of 20 persons in the ascending state, the descending state and the standing state, and the average values are averaged again, and are classified by the walking state and the speed.
  • the value of the y-axis corresponding to the center portion of the x-axis decreases.
  • the ratio of the force information and the force to the body weight increases with time elapsed during the step of the wearer except for the running state, temporarily decreases again, . It can be seen that in the running state, the ratio of force to weight information and force variation information increases with time elapsed during the step of the wearer, but decreases after a specific time (or peak value)
  • FIG. 10 is a view showing a change in y-axis value (information of a value obtained by dividing force variation information by body weight) in the drawing of FIG. 11 is a view showing maximum pressure variation information according to an embodiment of the present invention.
  • 12A and 12B are views showing fastness variation information and maximum pressure variation information according to various walking states according to an embodiment of the present invention.
  • the upper curve graphs G1, G2, and G3 represent the fastness information
  • the lower curve graphs G1 ', G2', and G3 ' represent the maximum pressure variation information.
  • FIG. 12A is a graph showing the force variation and the maximum pressure variation in each of the walking state and the downward state
  • FIG. 12B is a graph showing the force variation and the maximum pressure variation in the walking state and the stair climbing state
  • G1 is the first peak value
  • G2 is the second peak value
  • G3 is the third value
  • G1 ' is the eleventh peak value
  • G2' is the twelfth peak value
  • G3 ' Represents the thirteenth value.
  • the y-axis unit of the upper curve graph (G1, G2 and G3) is the force (N) and the y-axis unit of the lower curve graph (G1 ', G2' and G3 ') is the pressure (kPa).
  • the force information increases as the time elapses during the wearer's step the force increases to the first peak value, decreases from the first peak value to the third value, increases from the third value back to the second peak value, The peak value can be reduced again.
  • the maximum pressure variation information increases as the time elapses during the wearer's step, the pressure increases from the eleventh peak value to the eleventh peak value, the pressure rises from the thirteenth value to the twelfth peak value, 12 < / RTI > peak value.
  • the difference between the first peak value or the second peak value and the third value is more noticeable than the case of ascending the stairs.
  • the first peak value may be much larger than the second peak value in a state of going down the stairs.
  • the eleventh peak value can be considerably small in comparison with the thirteenth value in the state of going up the stairs.
  • the force information increases as the time elapses during the step of the wearer, the force increases to one peak value, decreases at the one peak value, and the peak value does not appear again after one peak value have.
  • the maximum pressure variation information in the running state may increase as the time elapses during the step of the wearer to one peak value and decrease at the one peak value and the peak value may not appear again after one peak value .
  • the controller 230 can more accurately determine the wearer's walking state. Specifically, the control unit 230 calculates force information indicating the force of each sensing point during a plurality of sensing points based on the pressure information received from the smart shoes 100, and outputs tracking information for the steps of the wearer, It is possible to determine the wearer's walking condition based on the information.
  • control unit 230 determines whether the walking state of the wearer is a standing state, a walking state, a stepping up state, a stepping down state, and a running state It can be judged whether or not it is one of them.
  • the control unit 230 calculates maximum pressure variation information indicating a maximum pressure at each sensing point during a plurality of sensing points, and calculates a walking state based on the force variation information and the maximum pressure variation information, The user can determine whether the user is going down or running.
  • the control unit 230 determines that the wearer's walking state is a stepwise lowering state. If the difference between the eleventh peak value and the thirteenth value is If the force is increased to only one peak value or if the peak value of the pressure is equal to or greater than the fourth value and increases only to one peak value, it is determined that the wearer's walking It is possible to judge the state as the above-mentioned running state. In the running state, the fourth value may be greater than the pressure or maximum pressure variation peak value in the standing state, the walking state, the stepping up state, and the stepping down state. In other cases, the control unit 230 can determine that the wearer is walking.
  • the controller 230 may determine the walking speed of the wearer based on the difference between one of the first peak value and the second peak value and the third value. For example, the control unit 230 can determine that the walking speed of the wearer is faster as the difference between the first peak value and the third value increases.
  • control unit 230 can calculate at least one of the wearer's locus information, strength information, and maximum pressure variation information in only one step, and determine the wearer's walking state based on the calculated information.
  • the controller 230 may analyze the plurality of steps instead of one step to determine the wearer's walking state. For example, the controller 230 may analyze the first step of the wearer to determine that the wearer is in a standing state. Then, the control unit 230 can sequentially analyze the wearer's nth step to determine the wearer's walking state at each step. The control unit 230 can determine the walking state having the highest number of the walking states of the wearer as the current walking state of the wearer by each step.
  • control unit 230 may determine the wearer's walking state by a specific time period.
  • control unit 230 may use at least one of the force variation information and the maximum pressure variation information to determine whether the vehicle is standing up. In this case, the controller 230 may determine the walking state of the wearer based on the force variation information, the maximum pressure variation information, and the like without the locus information.
  • FIGS. 13A to 13C are views for distinguishing a state of climbing a staircase and a state of descending a staircase according to another embodiment of the present invention.
  • FIG. 13A shows force variation information in a state where the wearer steps up and down the stairs
  • FIG. 13B is a diagram in which the value of the y axis is changed in FIG. 13A, and the value obtained by dividing the force by the wearer's weight is taken as an axis
  • 13C shows maximum pressure variation information in a state where the wearer steps up the stairs and a state where the wearer steps down the stairs.
  • the control unit 230 can distinguish between a state of climbing the stairs and a state of descending the stairs.
  • the state of going down the stairs is such that the first peak value is greater than the wearer's weight.
  • the control unit 230 can more clearly discriminate the state of going down the stairs.
  • FIG. 14 is a view showing information of a value obtained by dividing force variation information by body weight in a running state according to another embodiment of the present invention.
  • the running state information of a value obtained by dividing force variation information or force variation information by body weight
  • the maximum pressure variation information in a state in which the force increases to one peak value as time elapses and decreases at the one peak value and the peak value does not appear again after one peak value,
  • the pressure increases to one peak value, decreases at the one peak value, does not appear again after one peak value, and the peak value of the pressure is equal to or higher than the fourth value.
  • the electronic device 200 calculates the locus information, the promote information, and the maximum pressure variation information.
  • the control unit 140 of the smart shoe 100 may calculate the trajectory information, the fastness information, and the maximum pressure variation information from the sensed pressure information, and transmit the calculated information to the electronic device 200.
  • the electronic device 200 may further include a display.
  • the display is configured to display the image processed by the control unit 230.
  • the display can display the wearer's locus information, force information, maximum pressure variation information, and walking status.
  • the display may be implemented by a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), an LED (Light Emitting Diode), a PDP (Plasma Display Panel) or the like, but is not limited thereto.
  • the display may be implemented as a flexible display, a transparent display, or the like as the case may be.
  • the electronic device 200 may include a loudspeaker to provide information on the wearer's locus information, force variation information, maximum pressure variation information, and walking state to the wearer as a sound.
  • the smart shoes 100 sense pressure information and the like, and the electronic device 200 receives the information to calculate the trajectory information, the force variation information, the maximum pressure variation information, the walking state, It is not.
  • the smart shoe 100 senses pressure information and the like, and can directly calculate the locus information, the strength information, the maximum pressure variation information, the walking state, and the like.
  • the storage 120 of the smart shoe 100 is configured to calculate the trajectory information from the sensed pressure information, to calculate the force variation information, to calculate the maximum pressure variation information, and to calculate the walking state Can be stored.
  • the smart shoe 100 may include at least one of a speaker and a display to provide the calculated locus information, strength information, maximum pressure variation, and walking state directly to the wearer.
  • the electronic device 200 determines whether the wearer is a normal person based on at least one of the locus information, the force variation information, and the maximum pressure variation information, and if at least one of the locus information, the force variation information, The wearer may judge that the wearer is not a normal person.
  • the smart shoe system determines the walking state of the wearer based on the trajectory information about the pressure center so that the wearer's walking state is in a standing state, a walking state, A state in which it is in a downward state.
  • the smart shoes system can improve the accuracy in judging the wearer's walking state by judging the walking state of the wearer by considering not only the locus information but also the strength information and the maximum pressure variation information.

Abstract

La présente invention concerne un système de chaussures intelligentes pour calculer des informations de trajectoire, des informations de variation de force, et des informations de variation de pression maximale de centres de pression continus des pas d'un porteur sur la base d'informations de pression détectées par des chaussures intelligentes et pour déterminer un état de marche du porteur sur la base des informations calculées, et le système de chaussures intelligentes comprend : la chaussure intelligente, qui comprend une pluralité de capteurs pour détecter une pression par les semelles de l'utilisateur et transmet les informations de pression détectées à un dispositif électronique; et le dispositif électronique, qui calcule des informations de trajectoire, des informations de variation de force, et des informations de variation de pression maximale de centres de pression continus des pas du porteur sur la base des informations de pression reçues des chaussures intelligentes, et détermine un état de marche du porteur sur la base des informations calculées. Par conséquent, le système de chaussures intelligentes peut déterminer un état de marche de l'utilisateur, parmi un état vertical, un état de marche, un état de montée d'escalier et un état de descente d'escalier.
PCT/KR2018/008466 2017-07-28 2018-07-26 Système de chaussures intelligentes pour déterminer l'état de marche d'un porteur WO2019022533A1 (fr)

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