KR102064563B1 - Smart shoes system for judging ambulation condition of a wearer - Google Patents

Abstract

The present invention calculates the trajectory information, force variation information and maximum pressure variation information for the continuous center of pressure for the wearer's step based on the pressure information sensed by the smart shoes, and based on the calculated information. The smart shoe system for determining the walking state of the wearer, the smart shoe system includes a plurality of sensors for detecting the pressure by the sole of the wearer, smart shoes and smart shoes for transmitting the detected pressure information to the electronic device Based on the pressure information received from the step of calculating the trajectory information and force variation information and the maximum pressure variation for the center of pressure (step) of the wearer's step, and determine the walking state of the wearer based on the calculated information It includes an electronic device. Accordingly, the smart shoe system can determine whether the walking state of the wearer is a standing state, a walking state, a state of going up the stairs, and a state of going down the stairs.

Description

SMART SHOES SYSTEM FOR JUDGING AMBULATION CONDITION OF A WEARER

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 detected during wearer's walking.

Thanks to the development of electronic technology, various types of electronic devices are used in various fields. In particular, the health care industry is growing with the development of information and communication technology. The healthcare industry is a general health care business, which encompasses not only existing simple treatment services but also disease prevention, management, remote examination and visiting health consulting.

In addition, with the miniaturization and mass production of various devices and the increasing interest in health care, smart clothing or smart shoes that can accurately check various bio signals and health information of people in daily life without visiting medical institutions Is being developed. Existing smart shoes have an insole that includes a pressure sensor, and can transmit information about the wearer's weight, center of gravity information and movement to the smartphone.

In particular, Korean Patent Publication No. 10-2013-0147208 discloses a shoe having a plurality of pressure sensors attached thereto, and measures a pressure generated when a pedestrian is walking, and discloses a configuration for predicting a walking state based on the same. Doing. In particular, the prior literature mentions the configuration of Hwang Jae-jae, the sole pressure analysis and diabetic pressure analysis of diabetic patients, and discloses a configuration for distinguishing the inner or outer limbs.

However, the technique proposed in the related art is limited to only checking a specific state by checking a disease or the like. Accordingly, a general method of clearly identifying whether a pedestrian is currently walking, standing, running, going up stairs, going down stairs, etc., based on the pressure generated when the pedestrian is walking, will be developed. There is a need.

Korea Patent Registration No. 10-2013-0147208

The present invention calculates the trajectory information for the continuous center of pressure for the wearer's step based on the pressure information sensed by the smart shoes, and determines the walking state of the wearer based on the calculated trajectory information. The purpose is to provide a smart shoe system.

The present invention is based on the pressure information sensed by the smart shoes, the force variation information indicating the force of each detection time point for a plurality of detection time points and the maximum indicating the maximum pressure of each detection time point for a plurality of detection time points. An object of the present invention is to provide a smart shoe system that calculates pressure variation information and determines a walking state of a wearer based on a tracker's information on a wearer's step, force variation information, and maximum pressure variation information.

Smart shoes system according to an embodiment of the present invention for achieving the above object includes a plurality of sensors for detecting the pressure by the sole of the wearer, and transmits the detected pressure information to the electronic device Calculating locus information on a continuous center of pressure for the step of the wearer based on the smart shoes and the pressure information received from the smart shoes, and calculating the walking state of the wearer based on the locus information. It includes an electronic device to determine.

The electronic device may determine a walking state of the wearer based on at least one of a length of the trajectory of the pressure center and a position relative to the smart shoes of the trajectory of the pressure center during the step of the wearer among the trajectory information. Can be.

The electronic device may determine the walking state of the wearer as a standing state when the length of the trace of the pressure center is less than the first predetermined length, and the length of the trace of the pressure center may be the preset first length. If it is above the predetermined second length, the walking state of the wearer is determined as a state of climbing the stairs, and if the length of the trajectory of the pressure center is greater than the predetermined second length, the walking state of the wearer is walking. A state of running or a state of running up the stairs, and one of the walking state and the running state, the starting point of the trajectory of the pressure center and the corresponding first end of the smart shoes; The first distance of the predetermined distance is greater than the second distance between the end point of the trajectory of the pressure center and the corresponding second end of the smart shoes. If more than one, the walking state of the wearer can be changed to the state going down the stairs.

In addition, the pressure information received from the smart shoes includes a plurality of sensing points and pressure information detected by the plurality of sensors for each of the plurality of sensing points, and the electronic device is based on the pressure information received from the smart shoes. And calculating first information representing a force at each sensing time point during the plurality of sensing time points, and determining a walking state of the wearer based on the trajectory information of the wearer's step and the first information. The device may be one of the walking state, the state of walking up the stairs, the state of walking down the stairs, and the state of running down the stairs based on the length of the trajectory of the pressure center during the step of the wearer of the track information. Can be judged.

In addition, the electronic device calculates second information representing the greatest pressure at each sensing time point during the plurality of sensing time points, and the walking state and the climbing state of the stairs based on the first information and the second information. And one of the state of descending the stairs and the state of running.

In addition, in the walking state, the state of climbing the stairs, or the state of descending the stairs, the first information increases the force to the first peak value as time passes during the step of the wearer, and at the first peak value Decrease to a third value, increase from the third value back to a second peak value, decrease again at the second peak value, and increase the second in the walking state, the step up, or the step down; The information increases as time elapses during the wearer's step, the force increases to an eleventh peak value, decreases from the eleventh peak value to a thirteenth value, increases from the thirteenth value to the twelfth peak value, The force decreases again at the twelfth peak value, and in the running state, the first information indicates that the force is one peak value as time passes during the wearer's step. And increase in the one peak value, and the second information in the running state increases the pressure up to one peak value and decreases in the one peak value over time during the wearer's step. ,

If the first peak value is greater than or equal to the second peak value, the electronic device determines the walking state of the wearer as going down the stairs, and the difference between the eleventh peak value and the thirteenth value. Is less than or equal to a second predetermined size, the walk state of the wearer is determined as a state of climbing the stairs, and the force has only one peak value or the peak value of the pressure is greater than or equal to the fourth value and only one peak value exists. In this case, the walking state of the wearer may be determined as the running state.

The electronic device may determine a 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.

In addition, the electronic device may calculate the force by weighting the pressure values detected by the plurality of sensors at the respective sensing points during the plurality of sensing points to the size of an area where each sensor is disposed.

According to various embodiments of the present disclosure as described above, the smart shoe system determines the walking state of the wearer based on the trajectory information on the pressure center, so that the walking state of the wearer is in the standing state, the walking state, the state of climbing the stairs, and It can be determined whether the state of going down the stairs and the running state.

According to various embodiments of the present disclosure as described above, the smart shoe system determines the walking state of the wearer by determining the walking state of the wearer by further considering force variation information and maximum pressure variation information as well as trajectory information. Can be improved.

1 is a view for explaining a smart shoes system (smart shoes system) according to an embodiment of the present invention.
2 is a block diagram illustrating a smart shoe according to an embodiment of the present invention.
3A and 3B are views illustrating a sensor unit according to an embodiment of the present invention.
4 is a block diagram illustrating an electronic device according to an embodiment of the present disclosure.
5 is a diagram illustrating trajectory information of a pressure center according to an embodiment of the present invention.
6 is a diagram illustrating force variation information for each walking speed according to an embodiment of the present invention.
FIG. 7 is a diagram in which values of the y-axis are changed in FIG. 6.
8 is a diagram illustrating maximum pressure variation information for each walking speed according to an embodiment of the present invention.
9 is a diagram illustrating force variation information for each walking state according to an embodiment of the present invention.
FIG. 10 is a view of changing a value of a y-axis in the drawing of FIG. 9.
FIG. 11 is a diagram illustrating maximum pressure variation information for each walking state according to an embodiment of the present invention. FIG.
12A and 12B are diagrams illustrating force variation information and maximum pressure variation information according to various walking states according to an embodiment of the present invention.
13A to 13C are diagrams for distinguishing a state of climbing a staircase and a state of descending a staircase according to another exemplary embodiment of the present disclosure.
FIG. 14 is a diagram illustrating information of force variation information divided by weight in a running state according to another exemplary embodiment of the present invention. FIG.

Hereinafter, with reference to the contents described in the accompanying drawings will be described in detail the present invention. However, the present invention is not limited or limited by the exemplary embodiments. Like reference numerals in the drawings denote members that perform substantially the same function.

The objects and effects of the present invention may be naturally understood or more apparent from the following description, and the objects and effects of the present invention are not limited only by the following description. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a view for explaining a smart shoes system (smart shoes system) 1000 according to an 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 detecting pressure caused by the sole of the wearer, and transmit the detected pressure information to the electronic device 200. For example, the smart shoes 100 may sense pressure on each of the left sole and the right sole. In addition, the smart shoes 100 may detect pressure on a plurality of areas such as pressure of the toe portion and pressure of the heel portion with respect to any one of the left sole and the right sole.

The smart shoes 100 may transmit information detected by the plurality of sensors to the electronic device 200. For example, the smart shoes 100 may transmit information detected by the plurality of sensors to the electronic device 200 in real time.

Alternatively, the smart shoes 100 may transmit information detected by the plurality of sensors to the electronic device 200 at predetermined time intervals. In this case, the smart shoes 100 may store the detected information until the information is transmitted to the electronic device 200.

In particular, the smart shoes 100 may transmit the information on the plurality of sensing points and the pressure information detected by the plurality of sensors for each of the plurality of sensing points to the electronic device 200 during the wearer's step.

The electronic device 200 according to various embodiments of the present disclosure is a device configured to perform an operation. For example, a tablet personal computer (PC) and a personal digital assistant (PDA) may be used. ), A smart phone, a mobile phone, and the like.

The electronic device 200 calculates trajectory information on a continuous center of pressure for the wearer's step based on the pressure information received from the smart shoe 100, and based on the trajectory information, the walking state of the wearer. Can be determined.

Hereinafter, a structure and an operation of the smart shoes 100 and a method of determining a wearer's walking state of the electronic device 200 will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a smart shoe 100 according to an embodiment of the present invention. According to FIG. 2, the smart shoe 100 may include a sensor unit 110, a storage 120, a communication unit 130, and a controller 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.

3A and 3B are views illustrating a sensor unit 110 according to an embodiment of the present invention. First, as shown in the right side of FIG. 3A, the smart shoe 100 may form the sole portion as the sensor unit 110. The sensor unit 110 formed on the sole portion may include a plurality of sensors. For example, the plurality of sensors may be disposed on the same plane as the sole of the smart shoe 100.

In FIG. 3A, a plurality of sensors are illustrated in the entire area of the sole, but this is only an example. For example, there are five sensors, and five sensors may be placed only on important areas such as toes and heel.

In addition, although FIG. 3A illustrates a plurality of sensors for the left foot, a plurality of sensors arranged in left and right symmetry may also be provided in the right foot.

The plurality of sensors may detect pressure caused by the sole of the wearer. The pressure may be different for every detail area of the sole of the wearer, and all the results detected by the plurality of sensors may be different.

Figure 3b is an example of the result of detecting the pressure by the sole of the wearer. The higher the pressure, the higher the value, and some edges indicate no pressure was detected.

The storage 120 may store the information detected by the sensor unit 100. For example, the storage 120 may store the detected information until the information detected by the sensor unit 100 is transmitted to the electronic device 200.

The storage 120 may be implemented in various forms such as RAM, ROM, and the like, and there is no limitation as long as the storage 120 can store sensed information.

The communication unit 130 is a component that performs communication with various types of external devices according to various types of communication methods. The communicator 130 may include a Wi-Fi chip, a Bluetooth chip, a wireless communication chip, an NFC chip, and the like. The controller 140 may transmit the detected information to the electronic device 200 through the communication unit 130.

The Wi-Fi chip and the Bluetooth chip communicate with each other via WiFi and Bluetooth. In the case of using a Wi-Fi chip or a Bluetooth chip, various connection information such as SSID and session key may be transmitted and received first, and then various communication information may be transmitted and received by using the same. 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), Long Term Evolution (LTE), and the like. The NFC chip refers to a chip operating in a near field communication (NFC) method using a 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860-960 MHz, and 2.45 GHz.

Meanwhile, the communicator 130 may perform unidirectional or bidirectional communication with the electronic device 200. When performing unidirectional communication, the communication unit 130 may transmit a signal to the electronic device 200. When performing bidirectional communication, the communication unit 130 may receive a signal from the electronic device 200 or transmit a signal to the electronic device 200.

The controller 140 controls the overall operation of the smart shoes 100. Herein, the controller 140 may be implemented as a processor, a Micom, an application processor (AP), or the like.

The controller 140 may store the information detected by the sensor unit 110 in the storage 120. The controller 140 may transmit the information stored in the storage 120 to the electronic device 200 through the communicator 130. Alternatively, the controller 140 may transmit the information detected by the sensor unit 110 to the electronic device 200 in real time. Here, the controller 140 may classify pressure information according to a plurality of steps for the wearer's left foot and the right foot and transmit the classified information to the electronic device 200. In particular, the controller 140 may transmit the pressure information detected by the plurality of sensors for each of the plurality of sensing points and the plurality of sensing points to the electronic device 200.

In addition, the controller 140 may store the magnitude and time information of the detected pressure for each sensor. For example, the controller 140 may store the pressure 50 of the first sensor and the time 12:05 AM when the pressure is measured. The controller 140 may transmit the magnitude and time information of the pressure detected for each sensor to the electronic device 200.

The controller 140 may transmit the length information of the smart shoe 100 to the electronic device 200 in addition to the detected information. The length information of the smart shoes 100 may be stored in the storage 120 at the time of manufacturing the smart shoes 100. The controller 140 may transmit the length information of the smart shoes 100 only once at the first time when the electronic device 200 is linked with the electronic device 200.

Hereinafter, an operation of the electronic device 200 that receives the detected information will be described.

4 is a block diagram illustrating an electronic device 200 according to an embodiment of the present disclosure. According to FIG. 4, the electronic device 200 may include a communication unit 210, a storage 220, and a controller 230.

The communication unit 210 is configured to communicate 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 controller 230 may receive information detected from the smart shoes 100 and length information of the smart shoes 100 through the communication unit 210.

The Wi-Fi chip and the Bluetooth chip communicate with each other via WiFi and Bluetooth. In the case of using a Wi-Fi chip or a Bluetooth chip, various connection information such as SSID and session key may be transmitted and received first, and then various communication information may be transmitted and received by using the same. 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), Long Term Evolution (LTE), and the like. The NFC chip refers to a chip operating in a near field communication (NFC) method using a 13.56 MHz band among various RF-ID frequency bands such as 135 kHz, 13.56 MHz, 433 MHz, 860-960 MHz, and 2.45 GHz.

On the other hand, the communication unit 210 may perform one-way or two-way communication with the smart shoes 100. When performing unidirectional communication, the communication unit 210 may transmit a signal to the smart shoes 100. When performing bidirectional communication, the communication unit 210 may receive a signal from the smart shoes 100 or may transmit a signal to the smart shoes 100.

The storage 220 may store pressure information received from the smart shoe 100. In addition, the storage 220 may calculate a trajectory information on a center of pressure, a method of calculating force variation information, and a maximum pressure variation information from the received pressure information. How to calculate and how to determine the walking state of the wearer can be stored.

The storage 220 may be implemented in various forms such as a RAM, a ROM, and the like, and there is no limitation as long as the storage 220 can store the received information.

The controller 230 controls the overall operation of the electronic device 200. Here, the controller 230 may be implemented as a processor, Micom, and an application processor (AP).

First, the controller 230 may calculate trajectory information on a continuous pressure center of a wearer's step based on the pressure information received from the smart shoes 100. Here, the pressure information received from the smart shoes 100 may include a plurality of sensing points and pressure information detected by a plurality of sensors for each of the plurality of sensing points.

For example, if the smart shoe 100 has 30 sensors that sense pressure at 1 second intervals, a total of 30 pressure values detected 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 may be generated. The electronic device 200 receives this, and the controller 230 may calculate a pressure center from the 30 pressure values detected for the first 1 second. In addition, the controller 230 may calculate a pressure center from the 30 pressure values detected during the next 1 second. The controller 230 may repeat the above process for the data for a total of 10 seconds, and finally calculate 10 pressure centers. Ten pressure centers can form one trajectory. Here, the method for calculating the pressure center is well known, and a detailed description thereof will be omitted.

The controller 230 may determine a walking state of the wearer based on the locus information. In particular, the controller 230 may determine the walking state of the wearer based on at least one of the length of the pressure center trajectory and the position relative to the smart shoes 100 of the pressure center trajectory during the wearer's step of the track information. .

Alternatively, the controller 230 averages a plurality of consecutive pressure centers for a plurality of left steps of the wearer based on the pressure information received from the smart shoes 100 to average track information on the pressure centers of the wearer's left foot. Calculate the average trajectory information for the pressure center of the wearer's right foot by averaging a plurality of consecutive pressure centers for the plurality of right steps of the wearer based on the pressure information received from the smart shoes 100 The walking state of the wearer may be determined based on the average trajectory information on the center of pressure for the left foot and the average trajectory information on the center of pressure on the right foot.

Alternatively, the controller 230 may calculate pressure centers of the respective sensing time points during the plurality of sensing time points, and calculate trajectory information based on the calculated pressure centers.

On the other hand, the controller 230 receives the length information of the smart shoes 100 from the smart shoes 100, and based on the ratio between the length of the trajectory of the pressure center and the length information of the smart shoes 100, the walking state of the wearer You can also judge.

For example, when the length of the pressure center trace is within 30% of the length of the smart shoes 100, the controller 230 may determine the wearer's walking state as a standing state. However, this is only an example, and the numerical values may be changed as much as possible.

In addition to the trajectory information, the controller 230 may further determine the wearer's walking state by further considering force variation information and maximum pressure variation information.

Hereinafter, the operation of the controller 230 will be described in detail with reference to the accompanying drawings.

5 is a diagram illustrating trajectory information of a pressure center according to an embodiment of the present invention. Specifically, FIG. 5 shows 20-30 to 20 in each situation of standing, walking, stair climbing, stair descending, and running. It is a figure which averaged the locus information of a person. That is, even if the wearer is different, it can be seen that there is a tendency for the standing state, the walking state, the state going up the stairs, the state going down the stairs, and the running state.

Accordingly, the control unit 230 may determine the walking state of the wearer based on at least one of the length of the pressure center trajectory and the position relative to the smart shoes 100 of the pressure center trajectory during the wearer's step of the track information. have.

For example, if the length of the trace of the pressure center is less than the first predetermined length, the controller 230 determines the walking state of the wearer as an upright state, and the length of the trace of the pressure center is greater than or equal to the preset first length. When the length of the wearer is less than the set second length, the walking state of the wearer may be determined as going up the stairs, and when the length of the pressure center trajectory is greater than or equal to the preset second length, the walking state of the wearer may be determined as a walking state or running state.

In addition, the controller 230 may be a stand-up state, a state of climbing a step, and a walking state or a running state of the first point of the trajectory of the pressure center and the corresponding first end of the smart shoe 100. Is greater than a predetermined size greater than a second distance between the end point of the trajectory of the pressure center and the corresponding second end of the smart shoes 100, the walking state of the wearer may be changed to a state of going down the stairs.

Alternatively, the controller 230 may first determine a state of going down the stairs, and may distinguish a standing state, a walking state, a state of going up the stairs, and a running state when the stairs are not going down.

In addition, the controller 230 may determine a state of going down the stairs by using another method. For example, the controller 230 may compare the distances from the toe ends of the smart shoes 100 to both ends of the trajectory information to determine whether the stairs are in a down state.

However, the difference in length may be ambiguous in the walking state, the state of climbing the stairs, and the running state. In addition, the state of going down the stairs may also be difficult to clearly distinguish from the state of walking or going up the stairs. That is, when the controller 230 uses only the trajectory information, an error may occur depending on the wearer.

In order to minimize such errors, the controller 230 may further use force variation information and maximum pressure variation information. Here, the force variation information may be the force of each sensing time point for the plurality of sensing time points, and the maximum pressure variation information may be the greatest pressure of each sensing time point for the plurality of sensing time points. First, a method of calculating force variation information will be described.

6 is a diagram illustrating force variation information according to an embodiment of the present invention. Specifically, FIG. 6 is a result of measuring force variation when treadmill speeds are 2, 3, 4, 5, and 6 km / h, respectively, for 20 people in their 20s to 30s.

First, the wearer walks. For example, the moment the wearer steps on the left foot, the heel of the left foot first touches the floor, where the right foot may be the moment when it is about to fall off the ground. Accordingly, the weight may be distributed so that the pressure sensed near the heel of the left foot may be low. However, as the right foot gradually falls off the ground and at the same time the weight of the left foot of the wearer increases to the ground, the weight is directed to the left foot. Accordingly, the pressure sensed in the left foot can be large. 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 may be dispersed over the entire foot area and the pressure may be momentarily reduced. Again, the heel of the left foot falls and the pressure on the left foot can increase until the heel of the right foot reaches 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.

In the walking operation (similar to the running operation) as described above, the x-axis of FIG. That is, the x-axis is 0 when the heel touches the ground, and then 100 when the toe portion falls off the ground.

6 shows the ratio of the force at each time point to the maximum force during one step. The controller 230 may calculate a force by weighting the pressure values detected by the plurality of sensors at the respective sensing points during the plurality of sensing points to the size of the region where each sensor is disposed. That is, the force at each time point may be represented by the following equation.

[Equation]

Force = Pressure_1 Х area_1 + Pressure_2 Х area_2 + ...

           Pressure_n Х area_n

For example, the smart shoes 100 may include 99 sensors, and the pressure may be calculated by multiplying a pressure value measured by each sensor by an area occupied by each sensor, and summing the multiplication results.

The above formula represents the force at one time point, and the controller 230 may continuously calculate the force during one step. The largest force is the maximum force, and the ratio of the force at each time point to the maximum force is represented by the y-axis. FIG. 6 is a diagram illustrating an average of data measured for 5 minutes for each of 20 people in the same manner as above, and cumulatively showing the average values by interval-averaging the average values again.

FIG. 7 is a diagram illustrating a change in the value of the y-axis in FIG. 6. Specifically, FIG. 7 illustrates the unit of force calculated from the above, changed from N to kgf, and the value divided by the wearer's weight on the y-axis. In this case, the y value may be temporarily greater than 1, indicating that more force is carried than the weight of the wearer.

8 is a diagram illustrating maximum pressure variation information according to an embodiment of the present invention. First, a method of calculating the maximum pressure variation information will be described.

The controller 230 may calculate maximum pressure variation information indicating the greatest pressure at each sensing time point for the plurality of sensing time points. For example, the smart shoes 100 may include 99 sensors that detect pressure at 0.02 second intervals. In addition, the electronic device 200 may receive 99 pressure values detected from the smart shoes 100 at intervals of 0.02 seconds. The controller 230 may determine the largest value among the 99 pressure values at the same measurement time point and calculate the maximum pressure variation information including the value at which the pressure values at all the measurement time points are the largest.

9 is a diagram illustrating force variation information of 20 people according to an embodiment of the present invention. Specifically, FIG. 9 shows a state of walking at 2km / h, 3km / h, 4km / h, 5km / h, 6km / h, 6km / h, 7km / h, 8km / h, 9km / h, and stairs. In the ascending, descending, and standing states, the average of the measured data for 20 minutes for each of five people is averaged, and the average values are section-averaged again.

As shown in FIG. 9, as the walking speed increases, the value of the y-axis corresponding to the center portion of the x-axis decreases. Specifically, as shown in FIGS. 9 and 10, the force variation information and the ratio of force to weight increase with time during the wearer's step except for a running state, then temporarily decrease again, then increase again and then decrease. In the running state, the force variation information and the weight-to-weight ratio increase as time passes during the wearer's step, and then decreases after a specific time point (or peak value).

FIG. 10 is a diagram in which a value of the y-axis is changed (information of a value obtained by dividing force variation information by weight) in the diagram of FIG. 9. 11 is a diagram illustrating maximum pressure variation information according to an embodiment of the present invention.

12A and 12B are diagrams illustrating force variation information and maximum pressure variation information according to various walking states according to an embodiment of the present invention. In FIG. 12A and FIG. 12B, the green graph represents force variation information, and the blue graph represents maximum pressure variation information.

12A is a view measuring age variation and maximum pressure variation by age group in walking state and descending stairs, respectively. One drawing.

12A and 12B, G1 is a first peak value, G2 is a second peak value, G3 is a third value, G1 'is an eleventh peak value, G2' is a twelfth peak value, and G3 ' Represents a thirteenth value. The y-axis unit of the green graph is force (N), and the y-axis unit of the blue graph is pressure (kPa).

The force variation information is such that the force increases from time to time during the wearer's step 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, and the second May decrease again at the peak value. The maximum pressure variation information is such that the pressure increases from the eleventh peak value to the thirteenth value, increases from the eleventh peak value to the thirteenth value, and increases from the thirteenth value to the twelfth peak value over time during the wearer's step. Can decrease again at the 12 peak value.

In particular, it can be seen that in the walking state, the difference between the first peak value or the second peak value and the third value is more prominent than the state of climbing the stairs. The first peak value may be much greater than the second peak value in the state of going down the stairs. In the state of going up the stairs, the eleventh peak value may be significantly smaller than the thirteenth value.

In addition, in the running state, the force variation information may increase in force over time during the wearer's step, up to one peak value, decrease from the one peak value, and no peak value may appear again after one peak value. have. The maximum pressure variation information in the running state may be that pressure increases to one peak value and decreases from one peak value as time passes during the wearer's step, and the peak value may not appear again after one peak value. .

Using the above points, the controller 230 may determine the wearer's walking state more accurately. In detail, the control unit 230 calculates force variation information indicating force at each sensing point during the plurality of sensing points based on the pressure information received from the smart shoes 100, and track information and force variation of the wearer's step. The walking state of the wearer may be determined based on the information.

For example, the controller 230 may determine whether the wearer's walking state is in an upright state or walking state, ascending stairs and descending stairs, and running states based on the length of the trajectory of the pressure center during the wearer's step of the track information. It can be determined whether or not.

The controller 230 calculates maximum pressure variation information indicating the maximum pressure of each detection time point for a plurality of detection time points, and walks, climbs up stairs, and stairs based on the force variation information and the maximum pressure variation information. It can determine one of the going down state and the running state.

Specifically, when the first peak value is larger than the second peak value by more than the first size, the controller 230 determines the walking state of the wearer as going down the stairs, and the difference between the eleventh peak value and the thirteenth value is determined. It is determined that the walking state of the wearer is a state of climbing up the stairs when the second size is smaller than the set second size, and when the force increases only to one peak value or when the peak value of the pressure is greater than or equal to the fourth value and only one peak value, The state may be determined as the 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 state of climbing the stairs, and the state of descending the stairs. In other cases, the controller 230 may determine the walking state of the wearer as a walking state.

The controller 230 may determine the wearer's walking speed based on a difference between one of the first peak value and the second peak value and the third value. For example, the controller 230 may determine that the walking speed of the wearer is faster as the difference between the first peak value and the third value increases.

That is, as described above, the controller 230 may calculate at least one of the wearer's track information, force variation information, and maximum pressure variation information in one step, and may determine the wearer's walking state based on the calculated information.

In addition, the controller 230 may determine a walking state of the wearer by analyzing a plurality of steps instead of one. For example, the controller 230 may determine that the walking state of the wearer is a standing state as a result of analyzing the first step of the wearer. In addition, the controller 230 may sequentially analyze up to the nth step of the wearer to determine the wearer's walking state for each step. The controller 230 may determine the walking state having the highest number of walking states of the wearer for each step as the current walking state of the wearer.

Alternatively, the controller 230 may determine the walking state of the wearer for each specific time interval.

The controller 230 may determine whether the user is standing up using at least one of the force variation information and the maximum pressure variation information. In this case, the controller 230 may determine the walking state of the wearer based on the force variation information and the maximum pressure variation information without the trace information.

13A to 13C are diagrams for distinguishing a state of climbing a staircase and a state of descending a staircase according to another exemplary embodiment of the present disclosure.

FIG. 13A shows force variation information in a state where the wearer goes up the stairs and goes down the stairs, and FIG. 13B is a view in which the value of the y-axis is changed in FIG. 13A, and the force is divided by the wearer's weight. . 13C shows the maximum pressure variation information in the wearer's ascending and descending stairs, respectively.

As shown in FIG. 13A, there is a difference in the second peak value of the state of going up the stairs and of the state of going down the stairs. The control unit 230 may use this to distinguish the state of going up the stairs and the state of going down the stairs.

In particular, as shown in FIG. 13B, it can be seen that the first peak value is greater than the weight of the wearer in the state of descending the stairs. The controller 230 may more clearly determine a state of going down the stairs by using the same.

14 is a view showing information of the force variation information divided by the weight in the running state according to another embodiment of the present invention, the information of the force variation information or the force variation information divided by the weight in the running state is a wearer's step As time elapses, the force increases to one peak value, decreases from one peak value, and after one peak value no peak value appears again, and the maximum pressure variation information in the running state is the time during the wearer's step. As time passes, the pressure increases to one peak value, decreases from one peak value, and no peak value appears again after one peak value, and the peak value of the pressure is equal to or greater than the fourth value.

In the above description, the electronic device 200 calculates the trajectory information, the force variation information, and the maximum pressure variation information, but the present invention is not limited thereto. For example, the controller 140 of the smart shoe 100 may calculate trajectory information, force variation information, and maximum pressure variation information from the sensed pressure information, and transmit the calculated information to the electronic device 200.

Although not shown in FIG. 4, the electronic device 200 may further include a display. The display is configured to display an image processed by the controller 230. For example, the display may display the wearer's trajectory information, force variation information, maximum pressure variation information, walking state, and the like.

The display may be implemented as a cathode ray tube (CRT), a liquid crystal display (LCD), a light emitting diode (LED), a plasma display panel (PDP), or the like, but is not limited thereto. In some cases, the display may be implemented as a flexible display, a transparent display, or the like.

Alternatively, the electronic device 200 may be provided with a speaker to provide the wearer with sound information of the wearer's track information, force variation information, maximum pressure variation information, and walking state.

On the other hand, the smart shoe 100 has been described as sensing the pressure information, the electronic device 200 receives it and calculates the trajectory information, force variation information, maximum pressure variation information and walking state, etc., but is not limited thereto. It doesn't happen. For example, the smart shoes 100 may sense pressure information and the like, and directly calculate trajectory information, force variation information, maximum pressure variation information, walking state, and the like from the pressure information. In this case, the storage 120 of the smart shoe 100 may calculate a trajectory information from the sensed pressure information, a method of calculating force variation information, a method of calculating maximum pressure variation information, and a method of calculating a walking state. Can be stored.

In addition, the smart shoes 100 may directly provide the wearer with trajectory information, force variation information, maximum pressure variation and walking state calculated by including at least one of a speaker and a display.

On the other hand, it is also possible to first detect whether or not a normal person by using the above trajectory information, force variation information and maximum pressure variation information. For example, the electronic device 200 determines whether the wearer is a normal person based on at least one of the trajectory information, the force variation information, and the maximum pressure variation information, and if at least one of the trajectory information, the force variation information, and the maximum pressure variation information is determined. If is out of a certain range may be determined that the wearer is not a normal person.

According to various embodiments of the present disclosure as described above, the smart shoe system determines the walking state of the wearer based on the trajectory information on the pressure center, so that the walking state of the wearer is in the standing state, the walking state, the state of climbing the stairs, and the stairs. It can be determined which state of the down state. In particular, the smart shoe system can improve accuracy in determining the walking state of the wearer by determining the walking state of the wearer by further considering the force variation information and the maximum pressure variation information as well as the trajectory information.

1000: Smart Shoes System
100: smart shoes
110: sensor unit
120: storage
130: communication unit
140: control unit
200: electronic device
210: communication unit
220: storage
230: control unit

Claims (11)

delete delete In the smart shoes system,
Smart shoes including a plurality of sensors for detecting the pressure by the sole of the wearer, and transmits the detected pressure information to the electronic device; And
An electronic device for calculating trajectory information on a continuous center of pressure for the wearer's step based on the pressure information received from the smart shoes, and determining a walking state of the wearer based on the trajectory information. Including;
The electronic device,
Determine a walking state of the wearer based on at least one of a length of the trace of the pressure center and a position relative to the smart shoes of the trace of the pressure center during the step of the wearer among the track information;
If the length of the trajectory of the pressure center is less than the first predetermined length, the walking state of the wearer is determined as a standing state,
When the length of the trajectory of the pressure center is greater than or equal to the predetermined first length and less than the predetermined second length, the walking state of the wearer is determined to be a state of climbing the stairs.
When the length of the trajectory of the pressure center is equal to or greater than the second predetermined length, the walking state of the wearer is determined as a walking state or a running state,
In any one of the standing state, the state of climbing the stairs, and the walking state and the running state, a first distance between the start point of the trajectory of the pressure center and the corresponding first end of the smart shoes is determined by the pressure center. If the end point of the trajectory and the predetermined distance greater than the second distance with the second distance corresponding to the corresponding second end of the smart shoes, smart shoes system, characterized in that for changing the walking state of the wearer down the stairs.
delete In the smart shoes system,
Smart shoes including a plurality of sensors for detecting the pressure by the sole of the wearer, and transmits the detected pressure information to the electronic device; And
An electronic device for calculating trajectory information on a continuous center of pressure for the step of the wearer based on the pressure information received from the smart shoes, and determining a walking state of the wearer based on the trajectory information. Including;
Pressure information received from the smart shoes,
Pressure information detected by the plurality of sensors for each of the plurality of sensing points and the plurality of sensing points;
The electronic device,
Calculating first information representing a force at each sensing time point during the plurality of sensing time points based on the pressure information received from the smart shoes, and tracking the wearer's steps and the first information based on the first information. Judge the walking state of,
Based on the length of the trajectory of the pressure center during the wearer's step of the track information, whether the walking state of the wearer is an upright state, or walking state, going up the stairs, and going down the stairs and running state Smart shoes system characterized by judging.
The method of claim 5,
The electronic device,
Calculating second information representing the greatest pressure of each sensing time point during the plurality of sensing time points, and based on the first information and the second information, the walking state, the state of going up the stairs, and the step of descending the stairs; A smart shoe system, characterized in that for determining one of a state and a running state.
The method of claim 6,
The first information indicating the force of each sensing time point for a plurality of sensing time points in the walking state, the state of climbing the stairs, or the state of descending the stairs,
As time elapses during the wearer's step, the force increases to a first peak value, decreases from the first peak value to a third value, increases from the third value back to a second peak value, and Decreases again at the 2 peak value,
The second information in the walking state, the state of climbing the stairs, or the state of descending the stairs,
As time elapses during the wearer's step, the pressure increases to an eleventh peak value, decreases from the eleventh peak value to a thirteenth value, increases from the thirteenth value to the twelfth peak value, and Decreases again at the 12 peak value,
The first information in the running state,
As time passes during the wearer's step, the force increases to one peak value, and decreases from the one peak value,
The second information of the running state,
As time passes during the wearer's step, the pressure increases to one peak value and decreases at one peak value,
The electronic device,
If the first peak value is larger than the second peak value by a predetermined first size or more, it is determined that the walking state of the wearer is a state of going down the stairs,
If the difference between the eleventh peak value and the thirteenth value is less than or equal to a second predetermined size, the walking state of the wearer is determined as a state of climbing the stairs,
Walking of the wearer when the force increases up to one peak value and decreases at the one peak value, or if the peak value of the pressure is greater than a fourth value and only increases up to one peak value and decreases at the one peak value The smart shoe system, characterized in that for determining the state as the running state.
The method of claim 7, wherein
The electronic device,
And a walking speed of the wearer is determined based on a difference between one of the first peak value and the second peak value and the third value.
The method of claim 5,
The electronic device,
Smart shoes system, characterized in that for calculating the force by weighting the pressure value detected by the plurality of sensors at each of the sensing time points to the size of the area where each sensor is disposed.
The method according to claim 3 or 5, wherein
The electronic device,
Calculating average trajectory information for the center of pressure for the left foot of the wearer by averaging a plurality of consecutive pressure centers for a plurality of left steps of the wearer based on the pressure information received from the smart shoes,
Calculating average trajectory information for the center of pressure for the right foot of the wearer by averaging a plurality of successive centers of pressure for the plurality of right steps of the wearer based on the pressure information received from the smart shoes,
Smart shoes system, characterized in that for determining the walking state of the wearer based on the average trajectory information for the center of pressure for the left foot and the average trajectory information for the center of pressure for the right foot.
The method according to claim 3 or 5, wherein
Pressure information received from the smart shoes,
Pressure information detected by the plurality of sensors for each of the plurality of sensing points and the plurality of sensing points;
The electronic device,
Smart pressure system, characterized in that for calculating the pressure center of each detection time point during the plurality of detection time, and calculates the trajectory information based on the calculated pressure center.

Images