KR102407930B1 - Gait Recognition System and Method of Operating the Same - Google Patents

Abstract

A gait recognition system is provided. The gait recognition system is provided in the subject's shoes to store at least one gait detection device for detecting the gait state of the subject and the detection result of the gait detection device through a wireless network, recognize the gait state of the subject, and give the subject a gait It includes a management unit that provides and manages information about the status. The gait detection device includes a piezoelectric sensor that detects the position of the subject's foot, a control unit that detects the subject's gait state using a signal provided from the piezoelectric sensor, and transmits the subject's gait state detected by the controller to the management unit through a wireless network. It includes a power supply unit for supplying power to the transmitter and the control unit.

Description

Gait Recognition System and Method of Operating the Same

The present invention relates to a gait recognition system and an operating method thereof, and more particularly, to recognize the gait of a subject, that is, a gait state, and improve exercise ability through diagnosis thereof or gait recognition capable of early diagnosis of pathology It relates to a system and a method of operation thereof.

High-level gait disorder is a gait disorder caused by abnormalities in cortex or subcortical structures. Representative examples include Freezing Of Gait (FOG) and accelerated gait (festination).

Among them, gait freezing refers to an episodic cessation of gait during gait, and the patient's feet are in a state of being stretched to the ground for 1 to 10 seconds. Such gait freezing frequently occurs immediately before gait initiation, turning, narrow pathway, and arrival at a destination, and is more severe in cognitive overload.

And accelerated gait refers to a state in which the stride length is shortened and the cadence is increased regardless of the will during gait, also known as the sequence effect or motor instability.

Diseases that cause such high-level gait disorders are degenerative brain diseases, such as Parkinson's disease, progressive supranuclear palsy, and corticobasal degeneration, and secondary Parkinson's disease accompanied by hydrocephalus. Also included are Parkinson's syndrome and vascular parkinsonism.

As such, a disorder with symptoms similar to Parkinson's disease is collectively called Parkinsonism or Parkinson's syndrome.

Parkinson's disease is a disease in which nerves containing dopamine, a neurotransmitter, are degenerated. As it is known to be related to the induction of neuronal degeneration, many studies have been reported.

Among them, Bruce Yankner's team found that when the brain protein alpha-synuclein binds to dopamine in the nerve, it stimulates the secretion of toxic reactive oxygen molecules, which are cytotoxic substances, which eventually leads to the release of nerve cells. It has been shown that the degeneration of neurons containing dopamine is caused by auto-death (apoptosis). In addition, the degeneration of specific nerves by this alpha-synuclein eventually causes involuntary movement disorders, the main symptom of Parkinson's disease patients. He said it could be the cause.

And looking at the prevalence and mechanism of occurrence, Parkinson's disease, a representative disease of high-level gait disorders, has a prevalence of 780 per 100,000 people, and the prevalence in the population over 60 years of age reaches 1.47%.

This gait freezing occurs in about 1/2 of Parkinson's disease patients, and increases with disease progression, reaching 60% in more advanced disease states.

Parkinson's disease patients frequently fall due to gait freezing, and the risk of fractures increases, which greatly affects the patient's daily life and quality of life.

Currently, diagnostic methods for Parkinson's disease patients rely only on subjective clinical scales, and there is no objective and quantitative diagnostic system at all. UPDRS (Unified Parkinson's Disease Rating Scale) is a clinical scale to determine the severity and progression of Parkinson's disease, and is evaluated by a score from 0 to 4 (higher scores indicate severe symptoms) through observation by a clinician. is the most widely used. However, in UPDRS, the criteria for judging scores are not objective, and both intra-rater reliability within clinicians and among clinicians are both low, so diagnosis accuracy and medication efficiency are low, and patients There is a serious problem that repeated trial and error is required to determine the appropriate treatment for the condition.

In addition, in the case of the existing gait freeze analysis, the analysis is performed by applying the time domain and fuzzy theory, and only this method over-estimates or underestimates the situation of gait freeze in various Parkinson's disease patients. There are issues that can be under-estimated.

Recently, research on an inertial navigation device for calculating a user's posture, speed, and movement distance using an inertial sensor including an accelerometer and a gyroscope is accelerated. The gyroscope and accelerometer included in the used inertial sensor are inertial sensors that measure rotational angular velocity and linear angular velocity, respectively, and are used as core sensors of an inertial navigation device that calculates the posture, velocity, and position of a moving antibody. At this time, the user's posture is calculated by integrating the output of the gyroscope, and the user's speed and position are calculated by integrating the output of the accelerometer.

Also, recently, the user's gait state is measured with the above-described inertial navigation device, and this is applied to exercise performance related to the user's health.

KR 10-2019-0033802 A

The problem to be solved by the present invention is based on a signal obtained from a piezoelectric sensor instead of a conventional accelerometer, pressure sensor, or gyroscope sensor by recognizing the gait state of various subjects through an aircraft flight area recognition algorithm (algorithm). An object of the present invention is to provide a gait recognition system capable of assisting in exercise performance, improving exercise ability, or enabling early diagnosis of pathology.

Another problem to be solved by the present invention is to recognize the gait state of various subjects through a flight area recognition algorithm of an aircraft based on a signal obtained from a piezoelectric sensor instead of a conventional accelerometer, pressure sensor, or gyroscope sensor to perform movement of the subject An object of the present invention is to provide a method of operating a gait recognition system capable of assisting and improving motor performance or early diagnosis of pathology.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a gait recognition system. The gait recognition system is provided in the subject's shoes to store at least one gait detection device for detecting the gait state of the subject and the detection result of the gait detection device through a wireless network, recognize the gait state of the subject, and give the subject a gait It may include a management unit that provides and manages information about the status. The gait detection device includes a piezoelectric sensor that detects the position of the subject's foot, a control unit that detects the subject's gait state using a signal provided from the piezoelectric sensor, and transmits the subject's gait state detected by the controller to the management unit through a wireless network. It may include a power supply unit for supplying power to the transmitter and the control unit.

The controller may further include a sensor data preprocessor for removing unnecessary noise from a signal provided from the piezoelectric sensor, and a gait detection analyzer for identifying the gait state of the subject provided from the sensor data preprocessor.

The gait detection analysis unit may identify at least two or more pieces of information among landing, flotation, floor impact value, and flotation time among gait states related to the position of the subject's foot.

The management unit receives the detection result of the subject's gait state from the gait detection device, and identifies the subject's gait state from the detection result received through the flight area recognition algorithm of the aircraft by comparing it with the previously input gait recognition condition; Recognizing the subject's gait state for each time period and using the recognized subject's gait state result may be used to provide information for assisting or improving exercise to the subject, or a pathological diagnosis result.

The piezoelectric sensor may supply power to the power supply unit.

In addition, in order to achieve the above other object, the present invention provides a method of operating a gait recognition system. This method detects the subject's gait state with the gait detection device provided in the shoe, and the management unit that receives the detection result of the gait detection device through the wireless network detects the subject's gait state received through the flight area recognition algorithm of the aircraft. Comparing with pre-input gait recognition conditions may include identifying. In the gait detection device, the piezoelectric sensor detects the position of the subject's foot, the control unit detects the subject's gait state using a signal provided from the piezoelectric sensor, and the transmitter wirelessly transmits the subject's gait state detected by the control unit. Transmission to the management unit through the network can be performed.

The management unit identifies the subject's gait state from the detection result of the subject's gait state transmitted by the transmitter of the gait detection device by comparing it with the gait recognition condition input in advance, and using the result of the recognized subject's gait state It may be performed to provide information for assisting or improving exercise, or pathological diagnosis results.

The gait detection device includes a piezoelectric sensor that detects the position of the subject's foot, a control unit that detects the subject's gait state using a signal provided from the piezoelectric sensor, and transmits the subject's gait state detected by the controller to the management unit through a wireless network. It may include a power supply unit for supplying power to the transmitter and the control unit.

The controller may further include a sensor data preprocessor for removing unnecessary noise from a signal provided from the piezoelectric sensor, and a gait detection analyzer for identifying the gait state of the subject provided from the sensor data preprocessor.

The gait detection analysis unit may identify at least two or more pieces of information among landing, flotation, floor impact value, and flotation time among gait states related to the position of the subject's foot.

The piezoelectric sensor may supply power to the power supply unit.

As described above, according to the means of solving the problem of the present invention, the gait state of the subject is detected and recognized through the flight area recognition algorithm of the aircraft based on the signal obtained from the piezoelectric sensor that detects the position of the subject's feet, so that the subject's gait Objective diagnostic criteria for the condition may be presented, and continuous monitoring of the subject's gait condition may be possible. Accordingly, there may be provided a gait recognition system capable of recognizing the gait state of various subjects to assist the subject's exercise performance, and improving exercise ability or early diagnosis of pathology.

In addition, according to the means of solving the problem of the present invention, the subject's gait state is detected and recognized through the flight area recognition algorithm of the aircraft based on the signal for the position of the subject's foot obtained by the gait detection device including the piezoelectric sensor, so that the subject Objective diagnostic criteria for the gait state of the patient are presented, and continuous monitoring of the gait state of the subject may be possible. Accordingly, there may be provided a method of operating a gait recognition system capable of recognizing the gait state of various subjects to assist the subject's exercise performance, improving exercise ability, or performing early diagnosis of pathology.

1 is a schematic configuration diagram for explaining a gait recognition system according to an embodiment of the present invention.
2 is a block diagram illustrating a gait detection device, which is a component of a gait recognition system according to an embodiment of the present invention.
3 is a diagram illustrating an application example of a gait recognition system according to an embodiment of the present invention.
4 is a block flow diagram illustrating a method of performing a gait detection apparatus, which is a component of a gait recognition system, according to an embodiment of the present invention.
5 is a block flow diagram illustrating a method of performing a management unit, which is a component of a gait recognition system, according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein, and may be embodied in different forms. Rather, the embodiments introduced herein are provided so that this disclosure may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art, and the present invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout. Accordingly, the same or similar reference signs may be described with reference to other drawings, even if not mentioned or described in the drawings. In addition, although reference signs are not indicated, description may be made with reference to other drawings.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, 'comprises' and/or 'comprising' refers to the presence of one or more other components, steps, operations and/or devices mentioned. or addition is not excluded. In addition, since it is according to a preferred embodiment, reference signs provided in the order of description are not necessarily limited to the order.

When an element is referred to as 'connected to' or 'coupled to' with another element, it means that another element is directly connected or coupled to another element or in the middle. Includes all cases involving On the other hand, when one element is referred to as 'directly connected to' or 'directly coupled to' with another element, it indicates that another element is not interposed therebetween. 'and/or' includes each and every combination of one or more of the recited items.

Spatially relative terms 'below', 'beneath', 'lower', 'above', 'upper', etc. It can be used to easily describe the correlation of a device or components with other devices or components. Spatially relative terms should be understood as terms including different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, if the device shown in the figure is turned over, a device described as 'beneath' or 'beneath' of another device may be placed 'above' of the other device. Accordingly, the exemplary term 'down' may include both the direction of the bottom and the top. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Further, the embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. Accordingly, the regions illustrated in the drawings have a schematic nature, and the shapes of the illustrated regions in the drawings are intended to illustrate specific shapes of regions of the device and not to limit the scope of the invention.

1 is a schematic configuration diagram for explaining a gait recognition system according to an embodiment of the present invention, and FIG. 2 is a block for explaining a gait detection device, which is a component of a gait recognition system according to an embodiment of the present invention. It is a configuration diagram, and FIG. 3 is a diagram showing an application example of a gait recognition system according to an embodiment of the present invention.

1 to 2 , the gait recognition system includes at least one gait detection device 100 , 100-1 , 100-2 or 100-n , a wireless network 200 , and a management unit 300 . can do.

The gait detection device 100, 100-1, 100-2, or 100-n may be provided in the shoes 10 worn by the subject to detect the subject's gait state. The subject's gait state may be narrow stride length, movement of force, walking or running, and the like. The walking detection apparatus 100 , 100 - 1 , 100 - 2 or 100 - n may include a piezoelectric sensor 110 , a controller 120 , a transmitter 130 , and a power supply 140 . Here, n is a natural number. That is, the gait recognition system according to an embodiment of the present invention may recognize the gait state of each of a plurality of subjects.

The gait detection device 100 , 100 - 1 , 100 - 2 or 100 - n may be provided in a portion where the subject does not experience discomfort while wearing the shoes 10 . In FIG. 3 , the gait detection devices 100 - 1 and 100 - 2 are illustrated as being provided on the instep of the shoe 10 , but the present invention is not limited thereto. Unlike the drawings, the gait detection device 100 , 100-1 , 100-2 or 100-n may be provided in an insole, an outsole, a heel or heel of the shoe 10 . That is, the gait detection apparatus 100, 100-1, 100-2, or 100-n of the gait recognition system according to an embodiment of the present invention can detect the gait state of the subject without causing inconvenience to the subject. It may be provided in any part of the shoe 10 .

The piezoelectric sensor 110 may detect the position of the subject's foot. The piezoelectric sensor 110 may detect the position of the subject's foot, that is, about landing and levitation. A plurality of piezoelectric sensors 110 may be provided. 3, when the gait detection devices 100-1 and 100-2 are provided on the instep of the shoe 10, the piezoelectric sensor 110 is a shoe ( 10), such as the insole, outsole, or heel of each of the gait detection devices 100-1 and 100-2, provided separately in a portion that can be subjected to pressure by the subject's gait, such as the control unit 120 or the power supply unit 140 and It can have a linked configuration.

In addition, the piezoelectric sensor 110 may supply power to the power supply unit 140 . The piezoelectric sensor 110 may supply power to the power supply unit 140 using power generated by operation. Accordingly, the gait recognition system according to an embodiment of the present invention can continuously detect and recognize the gait state of the subject without interruption.

The controller 120 may detect the walking state of the subject by using a signal provided from the piezoelectric sensor 110 . The control unit 120 may further include a sensor data preprocessor 122 and a gait detection analysis unit 124 . The controller 140 may control the sensor data preprocessor 122 and the gait detection analysis unit 124 , and may transmit a detection result of the subject's gait state to the transmitter 130 .

The sensor data preprocessor 122 may remove unnecessary noise from a signal provided from the piezoelectric sensor.

The gait detection and analysis unit 124 may identify the gait state of the subject provided from the sensor data preprocessor 122 . The gait detection and analysis unit 124 may identify at least two or more pieces of information among landing, levitation, floor impact value, and flotation time among gait states related to the position of the subject's foot.

The transmitter 130 may transmit the walking state of the subject detected by the controller 120 to the manager 300 through the wireless network 200 .

The power supply unit 140 may supply power to the control unit 120 . The power supply unit 140 may have a configuration that enables wired and wireless charging. That is, the power supply unit 140 is configured to include a battery, and charging through connection with at least one piezoelectric sensor 110, wired charging through insertion of a jack, or wireless charging by a wireless charging device. possible configurations.

The management unit 300 receives and stores the gait state of the subject detected by the controller 120 from the transmitter 130 through the wireless network 200, recognizes the gait state of the subject, and provides information on the gait state to the subject. can be provided and managed.

The management unit 300 may be a personal computer (PC), a smart phone, or a server. When the management unit 300 is a personal terminal such as a personal computer or a smart phone, the subject may check information for exercise assistance and pathological diagnosis results from the recognition result of his/her gait state. When the management unit 300 is a server, it is possible to use big data to provide information for exercise assistance from the recognition result of the gait state for each of a plurality of subjects, or to improve pathological diagnosis and prediction accuracy. can

The management unit 300 receives the detection result for the subject's gait state from the gait detection device 100, 100-1, 100-2, or 100-n, and receives the subject's distinguishing the gait state for each of both feet for the gait state, identifying the gait state for each of both paws for the gait state of the subject by comparing it with the pre-entered gait recognition condition, time zone for the gait state of the subject It is possible to recognize the stars and provide information and pathological diagnosis results for exercise assistance to the subject from the recognized gait state of the subject.

4 is a block flow diagram illustrating a method of performing a gait detection apparatus, which is a component of a gait recognition system, according to an embodiment of the present invention.

Referring to FIG. 4 , the controller (see 120 in FIG. 2 ) of the gait detection device (see 100 in FIG. 2 ) removes unnecessary noise from the signal provided from the piezoelectric sensor (see 110 in FIG. 2 ) by the sensor data preprocessor 122 . can be removed from

The gait detection and analysis unit 124 identifies the output sequence, interval, and size from the signal from which unnecessary noise has been removed by the sensor data preprocessor 122, compares it with the pre-input gait state condition, and identifies the subject's gait Identification of the status by time period may be performed.

The identification by comparison with the pre-input gait state condition may be applied to a gait pattern recognition or a deep learning method.

5 is a block flow diagram illustrating a method of performing a management unit, which is a component of a gait recognition system, according to an embodiment of the present invention.

5, the management unit (see 300 in FIG. 1) receives the detection result of the subject's gait state from the gait detection device (see 100 in FIG. 2) to distinguish and recognize the gait state for each of both feet, The state of each of both feet for the subject's gait state is identified by comparing it with the previously input gait recognition condition, the subject's gait state is recognized for each time period, and exercise assistance for the subject is obtained from the recognized subject's gait state. It can be performed to provide information for and pathological diagnosis results.

Detecting and recognizing the signal obtained from the piezoelectric sensor in the gait recognition system according to an embodiment of the present invention may be using an aircraft flight area recognition algorithm.

A gait recognition system and an operating method thereof according to an embodiment of the present invention detect the gait state of a subject through a flight area recognition algorithm of an aircraft based on a signal for the position of the subject's foot obtained by a gait detection device including a piezoelectric sensor And by being recognized, objective diagnostic criteria for the subject's gait state may be presented, and continuous monitoring of the subject's gait state may be possible. Accordingly, there may be provided a method of operating a gait recognition system capable of recognizing the gait state of various subjects to assist the subject's exercise performance, improving exercise ability, or performing early diagnosis of pathology.

In the above, embodiments of the present invention have been described with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains can practice the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

10: shoes
100, 100-1, 100-2, 100-n: gait detection device
110: piezoelectric sensor
120: control unit
122: sensor data preprocessor
124: gait detection and analysis unit
130: transmitter
140: power supply
200: wireless network
300: management

Claims (5)

a plurality of gait detection devices provided on the subject's shoes to detect a gait state related to the position of the subject's feet; and a management unit of a personal terminal that stores the detection result of the gait detection device through a wireless network, recognizes the gait state of the subject, provides information on the gait state to the subject, and manages;
The gait detection device includes:
a piezoelectric sensor for detecting the position of the subject's foot; a control unit configured to detect the gait state related to the position of the subject's foot using a signal provided from the piezoelectric sensor; a transmitter for transmitting a gait state related to the position of the subject's foot detected by the controller to the management unit through the wireless network; a power supply unit for supplying power to the control unit; and
The control unit is:
a sensor data preprocessor for removing unnecessary noise from the signal provided from the piezoelectric sensor; and a gait detection and analysis unit for identifying a gait state related to the position of the subject's foot through a signal provided from the sensor data preprocessor;
The gait detection and analysis unit identifies the output sequence, interval, and size of the signal that has passed through the data preprocessor, and compares it with the writing power gait state condition by identifying information on landing, levitation, floor impact value and flotation time to determine the subject's foot performing location-related gait state detection,
The management department:
receiving a detection result for each gait state from the plurality of gait detection devices; recognizing the gait state of the subject by comparing each received detection result with a writing force gait recognition condition; recognizing the gait state of the recognized subject for each time period; and using the recognized result of the gait state of the subject to provide information for assisting or improving exercise for the subject, or a pathological diagnosis result;
The piezoelectric sensor is a walking recognition system for supplying power to the power supply. delete delete delete delete

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