KR101134213B1 - A device for gait training and gait analysis by symmetry weight-bearing feedback of low extremity disorder - Google Patents

Abstract

The present invention is a gait rehabilitation training of the lower limbs of the lower limbs and the lower body due to accidents or diseases such as traffic accidents and strokes, the weight of the lower limbs using a weight-bearing sensor The present invention relates to a walking rehabilitation training and analysis apparatus through symmetrical weight load feedback of patients with lower extremities who can measure the loads and analyze the walking patterns through the measured data.

Description

Gait rehabilitation and analysis device through symmetrical weight loading feedback of patients with lower extremities {A DEVICE FOR GAIT TRAINING AND GAIT ANALYSIS BY SYMMETRY WEIGHT-BEARING FEEDBACK OF LOW EXTREMITY DISORDER}

The present invention relates to a walking rehabilitation training and analysis apparatus through symmetrical weight load feedback of patients with lower limb disease, and the walking rehabilitation of lower extremity patients whose lower limbs and half body function are weakened due to accidents or diseases such as traffic accidents and strokes. In training, the weight-bearing sensor is used to measure the load on the affected lower limb, and to walk through the symmetrical weight-load feedback of patients with lower extremities who can analyze the walking pattern through the measured data. Rehabilitation and analysis apparatus.

Patients with lower extremity disorder receiving walking rehabilitation therapy may be instructed to perform partial weight-bearing (PWB) or full weight-bearing (FWB) training, depending on the disease.

Patients with partial weight bearing (PWB) include surgical fixation of fractured leg bones, arthroplasty of distorted hips, knees or ankles, knee ligament reconstructions, and patients with arthritis, sprains and fatigue fractures. In addition, these patients have difficulty in walking all of their weight due to postoperative pain or chronic pain, or excessive weight load due to incomplete osteotomy of bone.

Patients who are instructed to complete weight bearing (FWB) are advised to walk with as much weight as possible on the affected leg from the beginning of the disease. Diseases of these patients include patients with lower extremities, hemiplegia due to cerebral hemorrhage, and patients with walking disorders due to muscle weakness due to various causes.

Partial and full weight training is performed by the physiotherapist's subjective methods, such as 1) measuring how much weight the physiotherapist puts on the foot of an injured leg while the patient is standing. 2) Have the patient stand on two scales to observe and adjust the load on both feet, and then walk while remembering the load when walking later; or 3) use a full-length mirror to have the patient injured and healthy Visually remembering you are standing with the same weight, or 4) standing with your weight on both legs, or verbally instructing you to walk.

The rehabilitation methods described above are treated only by subjective judgments of rehabilitation therapists and by the memory of the patient's own load. In addition, patients who have been instructed to receive full weight are not aware of how much their weight is carrying and receive rehabilitation.

The present invention is to solve the above problems, the object of the present invention is to objectively quantify the weight on the patient's affected side during the progress of gait rehabilitation training, the appropriate weight on the lower extremity (患側) The present invention provides a gait rehabilitation training and analysis device through symmetrical weight load feedback of patients with lower extremities who can suggest whether or not they are loaded.

Another object of the present invention is to carry personally safe walking rehabilitation training using a low-cost strain gauge for patients who are chronically difficult to walk normally and patients with difficult visits due to brain disease and hemiplegia. It is to provide a gait rehabilitation training and analysis apparatus through symmetrical weight load feedback of patients with lower extremities.

Still another object of the present invention is to provide a gait rehabilitation training and analysis apparatus through symmetrical weight load feedback of patients with lower extremities who can remotely check a patient's gait rehabilitation training status in a hospital, thereby enabling the construction of a raw material medical care system.

According to a feature of the present invention for achieving the above object, the present invention relates to a gait rehabilitation training and analysis device through the symmetrical weight load feedback of patients with lower limb disease, the shoe to detect the weight of the patient applied through the sole A weight load sensor inserted into the insole of the body; And a weight value of the currently loaded patient based on a signal detected by the measuring sensor, connected to the measuring sensor, and contrasting with a preset value of the previously input weight, and feedbacking if the weight is above a setting value. It includes a feedback module for generating a signal.

In this case, the present invention may further include a communication module connected to the feedback module to transmit the actual weight value to a remote location.

The feedback module may be provided with a transmitter, and the communication module may be provided with a receiver so as to communicate information wirelessly between the feedback module and the communication module.

On the other hand, the weight load sensor may be a pressure sensor for detecting the pressure applied by the weight of the patient.

Alternatively, the weight load measuring sensor may include a metal part elastically deformed according to a degree of weight of a patient, a strain gauge attached to the metal part and deformed according to elastic deformation of the metal part to show a change in resistance value, and the It may be configured to include a signal switching unit connected to the strain gauge for converting the resistance value change in the strain gauge to the change amount of the voltage value.

At this time, the weight load sensor is installed on the insole of the shoe so as to correspond to at least one of the heel portion and the metatarsal head portion that carry the most weight when walking on the sole.

The upper and lower ends of the metal part may be provided with plates such that the load applied from the sole of the foot and the support force received from the ground may be evenly applied to the metal part.

In addition, the feedback module, the storage unit for storing a predetermined threshold value and multiples of the weight, and receives a signal from the weight load measurement sensor to calculate the actual weight value from the patient through the product of the threshold value and multiples Calculating a set value of the required body weight and determining whether the calculated real weight value is greater than or equal to the set value, and generating a feedback signal when the MCU unit receives a signal that the real weight value is greater than or equal to the set value; It includes a feedback unit.

In this case, the feedback module may further include an amplifier for receiving and amplifying a signal from the weight load measuring sensor, and a filter unit for removing noise included in the amplified signal and transmitting the signal to the MCU.

In addition, the feedback signal may be a sound signal or a vibration signal.

In addition, the multiple value is determined from a number within the range of 0.1 ~ 1.2.

According to the gait rehabilitation training and analysis device through the symmetrical weight load feedback of the patients with the lower limbs according to the present invention, the patient's weight on the patient's affected area during the gait rehabilitation training is objectively quantified, Because it can give the patient whether or not the proper weight is loaded, there is an effect that can increase the effect of rehabilitation training.

In addition, according to the present invention, it is possible to carry personally safe walking rehabilitation training using a low-cost strain gauge for patients who are chronically difficult to walk normally and patients with difficult visits due to brain disease and hemiplegia As a result, the convenience of rehabilitation training can be increased and the cost of the device can be lowered.

In addition, according to the present invention, it is possible to check the walking rehabilitation training status of the patient remotely in the hospital, so it is possible to build a remote care system, so that a more efficient and safe rehabilitation treatment can be carried out through grasping and guiding the training situation by a specialist without a visit. The advantage is that you can.

In addition, according to the present invention, it is possible to analyze the walking pattern (walking speed, walking cycle, number of walking) of the patient based on the measured load data, there is an advantage that more efficient and scientific rehabilitation treatment is possible.

1 is a conceptual diagram of a gait rehabilitation training and analysis device through symmetrical weight load feedback of patients with lower extremities;
2 is a view showing a shoe in which the weight load sensor is installed in the present invention,
3 is a view showing a position where the weight load sensor is inserted,
4 is a view showing a specific form of the weight load sensor,
5 is a block diagram for determining a setting value according to a system and a training mode of a biofeedback module;
6 is a program analyzing the output voltage measurement and walking pattern for weight load using the weight load sensor described in the present invention,
7 is a flowchart of weight load data;
8 is a diagram illustrating an example of a strain gauge and a signal switching unit in the weight load measurement sensor according to the present invention.

The following is a list of features of the present invention for achieving the above technical problem.

1. In the present invention, the weight measurement of the patient is carried out in two places (heel, prosthesis, the protruding part of the bottom of the toe of the sole) where the weight is most increased when walking in the insole of the shoe. It is detected by a weight-bearing sensor located.

At this time, any weight load sensor may be any sensor that can sense the weight of the patient, but the present invention mainly describes a strain gauge for detecting a change in pressure sensor or resistance.

And the shoe insole (sole) for measuring the weight load is composed of a three-layer structure. At this time, the insole of the insole serves to prevent the wear of the sensor, and is in direct contact with the ground. This part is hard and does not easily deform even when carrying weight, and it is preferable to use a light weight material (synthetic rubber) so that there is no inconvenience when walking, and the thickness thereof is preferably about 7 mm.

In addition, the insole of the insole is a hard and light material so that the sensor for measuring the weight is firmly fixed so that no distortion occurs, the thickness is preferably about 15mm.

In addition, the upper insole of the insole uses a soft material so that there is no discomfort when walking (general insole material).

In addition, the position of the sensor for measuring the weight load is preferably located in two places of the heel portion, the metatarsal head, and may be inserted only in the heel portion or the metatarsal head as needed.

2. In case the strain gage is used to sense the measured load in the present invention, the signal conversion part configured in the quarter-bridge form is used for the conversion to the electrical signal. That is, in the weight load sensor, each strain gauge acts as a resistor, and each strain gauge is connected to a signal switching unit formed in a quarter-bridge shape. The power is supplied to the signal conversion unit configured as described above, and the change of the strain resistance value according to the deformation of the metal portion with the strain gauge is measured, thereby converting the resistance change value with respect to the load into an electric signal. In this case, the converted signal is very fine and amplified using an amplification unit made of OP-AMP.

3. In the present invention, the system capable of giving biofeedback when the patient properly loads his / her weight, calculates the total weight of the patient as a percentage, sets a percentage of the appropriate weight to be in the rehabilitation situation, and corresponds to the set weight. It consists of a mode that can be fed back to the vibration and sound signal when the weight is loaded above the set value, and the mode that the patient himself sets the set value directly and gives feedback when the weight is above the set value.

The system is composed of one feedback module, and the feedback module includes an amplifier for amplifying a signal, a filter for removing noise of a signal, and a microcontroller unit (MCU) for calculating an electrical signal by weight load. It is divided into a feedback unit that can give feedback by the calculated signal. The apparatus may further include a storage unit configured to store setting values for weights preset in the two modes.

On the other hand, it is possible to directly enter the set value, but the threshold value of the weight that can be carried by the patient (threshold value) is determined and the threshold value and the multiple value by inputting a multiple value determined according to the walking training state of the patient It may be determined by the product of. At this time, the multiple value may be determined from a number within the range of 0.1 ~ 1.2. Therefore, if the threshold value of the patient walking training is 40kg, and it is desirable to train with a weight of 20kg or more during the first walking training, the multiple value may be determined as 0.5, which is 50% of the threshold value.

4. In the present invention, a communication system including the feedback module and a communication module such as a smart phone is connected by 'Bluetooth', which is a wireless connection method between a mobile phone and an electromagnetic period. The load data received by the feedback module is transferred to the Bluetooth transmitter, and the data is wirelessly transmitted to the Bluetooth receiver built in a communication module such as a smart phone. This data is then displayed in real time by the application of the communication module to display and analyze walking patterns in the communication module. In addition, the mobile communication function or wireless Internet of the communication module can be utilized in the remote medical care system between the hospital and the patient.

In addition, although the data transmission may be performed between the feedback module and the communication module by wireless communication as described above, it may be made by wire. In addition, wireless communication is not limited to Bluetooth.

Hereinafter, a walking rehabilitation training and analysis apparatus through symmetrical weight load feedback of patients with lower extremities according to the present invention will be described with reference to the accompanying drawings. In this case, the weight load sensor will be described based on a sensor using a strain gauge.

1 is an overall conceptual diagram of a walking rehabilitation training and analysis device through the symmetrical weight load feedback of patients with lower limbs, Figure 2 is a view showing a shoe with a weight load sensor installed in the present invention, Figure 3 is a weight load sensor Is a view showing the position where the insertion, Figure 4 is a view showing a specific form of the weight load sensor. 8 is a diagram illustrating an example of a strain gauge and a signal switching unit in the weight load measurement sensor according to the present invention.

The weight-bearing sensor 30 inserted under the insole 20 (in-sole) of the shoe 10 has a strain gauge 31 inserted into the metatarsal head 25 and the heel portion 24, respectively. The deformation of the metal part 32 due to the heavy weight load is output as a change in the resistance value. The output signal is transmitted to the quarter-bridge type signal switching unit 33. At this time, the signal switching unit 33 may be inserted into the insole 20 of the shoe 10, such as the strain gauge 31 and the metal part 32, but is connected to the strain gauge 31 in a wired manner to apply a reference voltage. It is preferably installed in the feedback module 40 which is easy to receive.

The weight load sensor 30 is installed in the midsole 22 when the insole 20 of the shoe 10 is composed of three parts, as shown in FIG. At this time, '21' of Figure 2 is composed of a light and hard material (synthetic rubber) to reduce the discomfort when walking to the insole of the insole 20, the thickness is preferably made of about 7mm.

In addition, '22' of FIG. 2 is a midsole capable of fixing the measuring sensor 30, and is formed of a light and hard material that is prevented from warping or bending as a whole, and the thickness of the sensor 30 is approximately. It is preferable that it consists of 17 mm.

In addition, '23' in FIG. 2 is an upper window contacting the sole, and a soft material (general insole 20 material) is used, and the thickness thereof is preferably about 3 mm.

In addition, '24' and '25' of FIGS. 2 and 3 are the heel portion and the metatarsal head portion in which the sensor 30 is inserted, respectively. Since the two sites are the most carried weight when walking, the sensor is inserted into each of the two sites. However, the sensor can be further mounted to other sites, including one or more of the two sites, as needed.

 As shown in (a) of FIG. 4, the weight load measuring sensor 30 includes two metal plates 34 on two portions 24 and 25 carrying the most weight when walking on the midsole 22. Upper and lower portions of the 32 are provided in the form of a sandwich. At this time, the plate 34 serves to allow the load applied from the sole and the bearing force from the ground to be evenly applied to the metal portion 32. For this purpose, the plate 34 does not bend to a normal weight. Made of material and thickness. In this embodiment, it is illustrated that the plate 34 is made of aluminum having a thickness of 1 mm.

As shown in (b) and (c) of FIG. 4, the metal part 32 has a width of 28 mm and a length of 28 mm, and the position L to which the strain gauge 31 is to be attached is a metal part 32. It is determined as the point at which the load (-F) can be deformed together when the load (-F) is applied at the upper end (32a) of. When a load is applied from the upper end 32a of the metal part 32, the repulsive force F from the ground is applied to the lower end 32b of the metal part 32, and the deformation of the metal part 32 when the load is applied. To minimize the interference with the protrusion 32 is formed to be eccentric with the upper end (32a) of the metal portion (32). That is, when the overall height of the metal part 32 in Fig. 4 (c) is 15mm, the position of the force is the lower center and the upper both sides in the drawing, both sides are eccentric from the lower center and about 2mm Towering Here, in FIG. 4B, the metal part 32 is shown upside down for convenience of understanding.

1, the resistance strain of the strain gauge 31 is transmitted to a feedback module 40 connected by wire. The weight load measuring sensor 30 connected into the feedback module 40 includes a quarter-bridge type signal switching unit 33 inside the feedback module 40, and the strain switching unit 33 includes a strain gauge 31. Measure the change in output voltage against the change in resistance.

In addition, the feedback module 40 includes an amplifier 41 for receiving and amplifying a signal from the signal switching unit 33 of the weight load measuring sensor 30, and a filter unit for removing noise included in the amplified signal. (42), a storage unit 43 for storing a threshold value and a multiple value of the preset weight, and a weight value calculated from the patient by calculating the actual weight value based on the noise canceled signal and multiplying the threshold value and the multiple value; An MCU unit 44 for calculating a set value of the control unit and determining whether the real weight value is greater than or equal to the set value, and a feedback unit 45 for generating a feedback signal when the real weight value is greater than or equal to the set value. . In addition, the feedback module 40 may further include a Bluetooth transmitter 46 for wireless communication with the communication module 50.

In more detail, the amplifying unit 41 amplifies the signal converted by the signal switching unit 33 because it is very fine, and generally OP-Amp is used. The amplified signal is filtered and calculated by the MCU unit 44 as a weight, and when a proper weight of a set value or more is loaded, the feedback unit 45 feeds back vibration and sound signals to the patient. At this time, the weight data measured by the module 40 is wirelessly transmitted to a Bluetooth receiver (not shown) embedded in the communication module 50 through a Bluetooth transmitter 46.

Thereafter, the transmitted signal is displayed on the screen of the communication module 50 through the application of the communication module 50 to perform a gait analysis, and is communicated with the hospital 60 using the mobile communication technology of the communication module 50. Enable telemedicine.

And the set value is the product of the limit value and the multiple of the multiple value, the limit value corresponds to the load value applied during normal walking when the patient is in a steady state or the target value of the lower limb load that the patient will achieve by walking training. Means an input value for adjusting the threshold value according to the step of walking training of the patient. At this time, the multiple value may be determined from a number within the range of 0.1 ~ 1.2.

Therefore, if the threshold value of the patient walking training is 40kg, and it is desirable to train with a weight of 20kg or more during the first walking training, the multiple value may be determined as 0.5, which is 50% of the threshold value. In addition, when it is desirable to train with a weight of 30 kg or more as the second step of walking training, the multiple value may be determined as 0.75, which is 75% of the limit value.

5 is a block diagram for determining a setting value according to a system and a training mode of the biofeedback module.

FIG. 5A is a system block diagram of the biofeedback module 40. Among the patients with lower limb injury and paraplegia, some of the patients can walk using the entire foot, while the heel does not touch the ground. As a result, there is a patient who carries weight only by the front of the foot. For that reason, among the two sensors 30 attached to the insole 20 of the shoe 10, the sensor 30, which is a reference input value of the biofeedback when training, is selected (step S100).

After the sensor 30 of the heel 24 attached to the insole 20 of the shoe 10 and the sensor 30 of the metatarsal head 25 or both of the sensors 30 are selected, training Set the mode. Training mode is to determine the set value by inputting the maximum load that can be carried on the patient himself (Fig. 5 (b)) and to calculate the weight of the patient himself as a percentage to load on the lower limb during rehabilitation It is divided into a method (c) of FIG. 5 (c) of determining a set value by inputting a percentage corresponding to a multiple value with respect to a threshold value of weight (step S200).

When the set value is determined as described above, it is determined by the method described above whether or not the weight is greater than the set value (step S300), and biofeedback is performed by sound and vibration when the weight is equal to or greater than the set value (step S400).

Figure 5 (b) is an algorithm for determining the weight to bear the patient himself in the method of determining the set value, the maximum load that can be loaded on the sensor 30 that is the reference input value of the feedback ( Step S411), the loaded load is determined as a set value (step S412). In this case, the set value may be determined as the threshold value, and the set value may be determined by multiplying the threshold value by a multiple of the patient's rehabilitation situation.

5 (c) shows an algorithm for calculating the total weight of the patient as a percentage (step S421), and determining the percentage of the weight corresponding to the patient's rehabilitation situation as a set value (step S422).

6 is a program analyzing the output voltage measurement and walking pattern for weight load using the weight load sensor described in the present invention.

The method of determining the set value is designed using the algorithm described in FIG. The program detects the number of walking using the measured load data, and measures the walking speed, the standing angle and the stance by calculating the walking time, but it is generally executed in the communication module 50, but in the feedback module 40 You can also run

In addition, the program designed in the present invention measures when the sensor 30 located on the heel portion 24 touches the ground and when the sensor 30 located on the metatarsal head 25 falls off the ground during walking. As a result, the walking pattern of the pedestrian is analyzed. In the case of biofeedback for patients, feedback is provided by LEDs and voice signals when the actual weight is above the set value.

7 is a flowchart of weight load data.

The two signal data measured by the sensor 30 installed in the heel 24 and the metatarsal head 25 are transmitted to the feedback module 40 by wire. It is then converted to a digital signal by the A / D converter 47 in the feedback module 40. The converted signal is input to the Bluetooth transmitter 46 through the MAX232 48, and this value is wirelessly transmitted to the Bluetooth receiver built in the communication module 50. The data transmitted to the communication module 50 transmits the data to the hospital 60 using the mobile communication technology of the communication module 50. Based on this data, the hospital can check the patient's rehabilitation status and remotely diagnose the patient's condition without visiting the patient.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

For example, in this embodiment, there is a part that describes the dimensions of the component, which is merely an example of the dimensions of the component, the dimensions of the component is not limited to the description.

10: shoes 20: insoles
24: heel portion 25: metatarsal head
30: weight load sensor 31: strain gauge
32: metal part 33: signal switching part
34: plate 40: feedback module
41: amplification section 42: filter section
43: storage 44: MCU
45: feedback unit 46: transmitter
50: communication module 60: hospital

Claims (11)

A weight load measurement sensor 30 inserted into the insole 20 of the shoe 10 to sense the weight of the patient applied through the sole of the foot; And
Based on the signal detected by the measurement sensor 30 connected to the measurement sensor 30 converts the actual weight of the patient currently carried out and contrasts with the preset value of the weight input in advance, It includes a feedback module 40 for generating a feedback signal if the set value or more,
The feedback module 40 receives a signal from the storage unit 43 and a weight load measuring sensor 30 that stores a preset threshold value and a multiple value of the weight, and calculates the actual weight value and the threshold value. The MCU unit 44 calculates a set value of the weight required from the patient through a multiplication of the multiple values, and determines whether the calculated real weight value is greater than or equal to the set value; Gait rehabilitation and analysis device through the symmetrical weight load feedback of the patient with a lower limb characterized in that it comprises a feedback unit 45 for generating a feedback signal when receiving a signal of more than the set value. The method of claim 1,
Gait rehabilitation training and analysis device through the symmetrical weight load feedback of the lower limb disease, characterized in that it further comprises a communication module (50) connected to the feedback module (40) to transmit the actual weight to a remote place. The method of claim 2,
The patient with the lower extremity disorder, characterized in that the feedback module 40 is provided with a transmitter, the communication module 50 is provided with a receiver so as to communicate information wirelessly between the feedback module 40 and the communication module 50. Gait rehabilitation and analysis device using symmetrical weight load feedback. The method of claim 1,
The weight load measurement sensor 30, the gait rehabilitation and analysis device through the symmetrical weight load feedback of the patient with the lower leg, characterized in that the pressure sensor for detecting the pressure applied by the weight of the patient. The method of claim 1,
The weight load measuring sensor 30 is attached to the metal part 32 and the metal part 32 elastically deformed according to the degree to which the weight of the patient is applied and deformed according to the elastic deformation of the metal part 32. And a strain gauge 31 indicating a change in resistance value, and a signal switching unit 33 connected to the strain gauge 31 to convert the resistance value change in the strain gauge 31 into a change amount of the voltage value. Gait rehabilitation training and analysis device through the symmetrical weight load feedback of patients with lower limb disease. The method according to claim 4 or 5,
The weight load measuring sensor 30 is installed on the insole 20 of the shoe 10 to correspond to at least one of the heel portion 24 and the metatarsal head portion 25, which carry the most weight when walking on the sole. Gait rehabilitation training and analysis device through the symmetrical weight load feedback of patients with lower limb disease. The method of claim 5,
Symmetry of the underlying disease, characterized in that the upper and lower ends of the metal portion 32, the plate 34 is installed so that the load applied from the sole and the support force received from the ground evenly applied to the metal portion 32 Gait rehabilitation and analysis device through weight load feedback. delete The method of claim 1,
The feedback module 40 includes an amplifying unit 41 for receiving and amplifying a signal from the weight load measuring sensor 30, and a filter unit 42 for removing noise included in the amplified signal and transferring the signal to the MCU unit. Gait rehabilitation training and analysis device through the symmetrical weight load feedback of patients with lower extremities characterized in that it further comprises a) The method of claim 1,
The feedback signal is a walking signal rehabilitation training and analysis device through the symmetrical weight load feedback of the lower limb disease, characterized in that the sound signal or vibration signal. The method of claim 1,
The multiple values are gait rehabilitation training and analysis device through the symmetrical weight load feedback of patients with lower extremities, characterized in that the number within the range of 0.1 ~ 1.2.

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