WO2022055065A1

WO2022055065A1 - Growth plate stimulation device for mounting to chair and operation method thereof

Info

Publication number: WO2022055065A1
Application number: PCT/KR2021/005426
Authority: WO
Inventors: 민경수
Original assignee: 주식회사 엠엔
Priority date: 2020-09-10
Filing date: 2021-04-29
Publication date: 2022-03-17
Also published as: KR102240304B1

Abstract

The present invention relates to a growth plate stimulation device for mounting to a chair and an operation method thereof. The growth plate stimulation device for mounting to a chair, according to an embodiment of the present invention, may comprise: a magnetic field generator which includes a magnetic coil to be mounted to a chair and a sensing part for sensing a magnetic field generated by the magnetic coil; and a controller which determines the state of a magnetic field on the basis of a sensing signal from the sensing part having sensed the magnetic field, and according to the result of the determination, adjusts the intensity of the magnetic field generated by the magnetic coil.

Description

Growth plate stimulation apparatus for mounting a chair and driving method of the apparatus

The present invention relates to a chair-mounted growth plate stimulation apparatus and a method of driving the apparatus, for example, a chair-mounted growth plate stimulation apparatus for stimulating height growth by stimulating the growth plates of both knees with a pulsed magnetic field when children are seated in a chair, and a method for driving the apparatus It relates to a method of driving a device.

For the growth of bone length, the cartilage of the growth plate is composed of cartilage cells, and when a stimulus is applied through exercise, the growth of bone length is achieved through division and proliferation of these cells. Taking the growth process of the leg as an example, the length growth in the femur of the leg is first through active division and proliferation of chondrocytes in the center of the epiphyseal cartilage, and then chondrocytes including connective tissue among the division-proliferated cells are transformed into osteoblasts to form osteoblasts. start making

Conventionally, methods such as physically massaging a growth plate or stimulating acupuncture points on the sole to promote growth hormone secretion have also been proposed to assist in height growth.

However, in the case of the physical growth plate massage method, in the case of a combination of external massage and heat by a motor or air pressure, the strength may be incorrectly adjusted and excessive pressure or thermal stimulation may be applied to damage the growth plate.

In addition, in the case of stimulating the acupoints on the soles of the feet, the socks must be removed and electrical stimulation must be directly applied to the soles of the feet. Therefore, it is difficult to use in daily life, and it is inconvenient to use it only during sleep.

An object of the present invention is to provide a chair-mounted growth plate stimulator for stimulating height growth by stimulating the growth plates of both knees with a pulsed magnetic field when children are seated in a chair, and a method of driving the device.

The growth plate stimulation apparatus for mounting a chair according to an embodiment of the present invention includes a magnetic field generator including a magnetic field coil mounted on a chair and a sensing unit sensing a magnetic field generated by the magnetic field coil, and a sensing signal of the sensing unit sensing the magnetic field and a control unit for determining the state of the magnetic field based on and adjusting the strength of the magnetic field generated in the magnetic field coil according to the determination result.

The magnetic field generating unit includes a first magnetic field coil unit and a second magnetic field coil unit mounted on the chair at a predetermined interval to receive a pulse voltage, respectively, and the sensing unit, the first magnetic field coil unit and the second magnetic field coil unit It is provided between the magnetic field coils to monitor the state of the magnetic field.

The sensing unit includes a Hall sensor or a sensing coil, and the control unit determines the volume of the knee of the user seated in the chair by confirming the change in the strength of the magnetic field based on the sensing signal, and based on the determined volume, the The strength of the magnetic field can be adjusted.

The controller may adjust the strength of the magnetic field so that a pulsed magnetic field having a preset strength of 2.3 millitesla (mT) is continuously supplied to the growth plate of the knee.

The controller may adjust the duty of a pulse width modulation (PWM) voltage signal applied to the first magnetic field coil unit and the second magnetic field coil unit, respectively, in order to adjust the strength of the magnetic field.

In addition, the method of driving a growth plate stimulation apparatus for mounting a chair according to an embodiment of the present invention includes the steps of: a magnetic field generator including a magnetic field coil mounted on a chair and a sensing unit, sensing the magnetic field generated in the magnetic field coil by the sensing unit , and, by a control unit, determining the state of the magnetic field based on the sensing signal of the sensing unit sensing the magnetic field, and adjusting the strength of the magnetic field generated in the magnetic field coil according to the determination result.

The sensing unit includes a Hall sensor or a sensing coil, and the adjusting includes determining the volume of the knee of the user seated in the chair by checking a change in the strength of the magnetic field based on the sensing signal, and the determined volume It may include adjusting the strength of the magnetic field based on the.

In the adjusting, the strength of the magnetic field may be adjusted so that a pulsed magnetic field having a preset strength of 2.3 millitesla (mT) is continuously supplied to the growth plate of the knee.

The adjusting may include adjusting the duty of the PWM voltage signals respectively applied to the first magnetic field coil unit and the second magnetic field coil unit to adjust the strength of the magnetic field.

According to an embodiment of the present invention, physical pressure, thermal stimulation, or skin-contact electrical stimulation is unnecessary, so that children and adolescents will be able to use the product safely and comfortably in a non-contact manner even while wearing clothes. For example, it may be possible to conveniently use the height growth product even when seated in a chair.

In addition, the reliability of the device is improved by ensuring that a pulsed magnetic field of constant intensity (eg 2.3 mT) is always supplied regardless of the volume of the knee, even when the user's knee has a large volume or the knee has a small volume. can guarantee

1 is a view showing a growth plate stimulation system for mounting a chair according to an embodiment of the present invention;

Figure 2 is a view for explaining the growth plate stimulation when the user is seated in the chair of Figure 1;

3 is a view for explaining the configuration of a pulsed magnetic field coil unit constituting the chair-mounted growth plate stimulation apparatus of FIG. 1;

4 is a view for explaining the operation of the inner coil and the sensing coil constituting the growth plate stimulation apparatus for mounting a chair of FIG. 1;

5 is a block diagram showing the detailed structure of the chair-mounted growth plate stimulation apparatus of FIG. 1;

6 is a block diagram showing another detailed structure of the growth plate stimulation apparatus for mounting a chair of FIG. 1;

7 is a flowchart showing a driving process of a chair-mounted growth plate stimulation apparatus according to an embodiment of the present invention;

8 is a flowchart illustrating a driving process of a chair-mounted growth plate stimulation apparatus according to another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a view showing a growth plate stimulation system for mounting a chair according to an embodiment of the present invention, FIG. 2 is a view for explaining the growth plate stimulation when a user is seated in the chair of FIG. 1, FIG. 3 is the chair of FIG. A view for explaining the configuration of the pulsed magnetic field coil unit constituting the growth plate stimulation apparatus for mounting, and FIG. 4 is a view for explaining the operation of the internal coil and the sensing coil constituting the growth plate stimulation apparatus for mounting a chair of FIG. 1 .

1 and 2, the chair-mounted growth plate stimulation system 90 according to an embodiment of the present invention includes a chair 97 and some or all of the chair-mounted growth

plate stimulation apparatuses

100 and 110. do.

Here, "including some or all" means that the growth

plate stimulation devices

100 and 110 for chair mounting are not separately configured and mounted (or assembled) on the chair, but are integrated into the chair 97 (eg, a mattress). , in the cushion), and the like, are described as being separately assembled to help a sufficient understanding of the invention.

1 and 2 illustrate a desk chair in relation to the chair 97, the present invention is not limited thereto. This is because, for example, various chairs such as office chairs, vehicle chairs, and table chairs may be included. Of course, the structure of the bracket 101 as shown in FIG. 1 may be variously modified according to the use of the chair. Furthermore, since the chair 97 according to the embodiment of the present invention may be mounted on a massage chair, etc. released by Body * Land, etc., it will not be particularly limited to any one shape.

The chair-mounted growth

plate stimulation apparatus

100, 110, as can be seen in FIG. 1, includes a main body 100 forming an outer periphery, a driving device 110 configured inside the main body 100, and a main body ( A bracket 101 for connecting one side to 100 and mounting the other side to the armrest of the chair 97 may be included. Since the bracket 101 may be coupled to the body part 100 in various shapes, the embodiment of the present invention will not be limited to any one shape. However, to give an example, a groove is formed in a straight line on one (side) surface of the body part 100 , that is, on the inner surface in contact with the chair 97 , and one side of the bracket 101 is inserted from both sides in a slide form, respectively. can have a structure that is In addition, the other side of the bracket 101 may be configured in various forms so that it can be fixed to the frame of the armrest. Typically, it may be formed in a ring shape to surround the vertical frame of the armrest. For example, it can be firmly fixed by generating tightening through screws or bolts in a ring shape. Since various structures are possible, it will not be specifically limited to any one form. The driving device 110 includes a control device configured on a PCB board inside the main body 100, a power supply unit 111 for accommodating a replaceable battery pack, etc., a power button unit 113 and a sound output unit 115, etc. may include Of course, it further includes a magnetic field generator for generating a magnetic field according to an embodiment of the present invention. Hereinafter, the magnetic field will be described as a pulsed magnetic field. Pulsed electromagnetic field (PEMF) refers to a magnetic field generated through a pulsed voltage.

As shown in FIG. 1 , a power button unit 113 is exposed on one side of the main body 100 , and a power supply unit 111 accommodating a replaceable battery pack from the side may be configured. The voltage of the power supply 111 is used to drive the driving device 110 . 3 and 4 show only the (magnetic field) coil unit related to the generation of the pulsed magnetic field among the driving device 110 . Pulsed

magnetic field generators

200 , 210 , 220 as shown in FIG. 3 may be provided on one side of the main body 100 , and these pulsed

magnetic field generators

200 , 210 , 220 are configured as shown in FIG. 4 . It may be provided on both sides of the left and right sides, respectively.

In addition, as can be seen in FIGS. 3 and 4 , the driving device 110 configured inside the main body 100 includes a first pulse magnetic field coil unit at a position corresponding to both knees of the user seated in the chair 97 . 300 and the second pulsed magnetic field coil unit 310 may be provided, respectively. In addition, a sensing coil 320 may be provided between the first pulsed magnetic field coil unit 300 and the second pulsed magnetic field coil unit 310 .

As shown in FIG. 3 , the pulse

magnetic field generators

200, 210, and 220 each including the first pulsed magnetic field coil unit 330 and the second pulsed magnetic field coil unit 310 of FIG. It includes a substrate 200 , an antenna unit 201 configured on the substrate 200 , and a connector unit 202 . The substrate 200 has a shape in which a hole 200a is drilled in the central portion. The antenna of the antenna unit 201 has a built-in loop antenna pattern, and may receive a high-frequency voltage (or signal) of 10 to 50 MHz. The pulsed

magnetic field generators

200 , 210 , and 220 of FIG. 3 show a low-frequency, high-frequency PEMF (Pulsed Electromagnetic Field) composite coil antenna for a chair-type growth care device. A coil unit 210 is configured above the antenna unit 201 formed on the substrate 200 . The coil unit 210 is a PEMF coil, for example, a low-frequency voltage of 1 to 100 Hz is applied. The PEMF coil is formed of an enameled wire of 0.05 ~ 0.5mm, and may be formed in a size of 10 ~ 2000 turns, 20 × 50mm. In addition, a cable 220 is connected to the connector unit 202 , and the cable 220 may be connected to a control device or the like. In this regard, more will be dealt with later.

With reference to FIG. 4, the pulsed

magnetic field generators

200, 210, and 220 according to an embodiment of the present invention will be described. On the left and right sides of the chair module, one PEMF coil radiates a pulsed magnetic field (M) toward the knee. In general, the magnetic field (B) is generated in a direction perpendicular to the flow of the current (I). It is also well shown in FIG. 2 . The growth plate 99 is a part of the knee chondrocytes, and thus, when the knee chondrocytes are stimulated to promote growth, the number of chondrocytes differentiated into the growth plate 99 increases, resulting in growth of the growth plate 99 . In an embodiment of the present invention, the growth of knee chondrocytes is promoted through a pulsed magnetic field strength of 2.3 millitesla (mT) based on the thesis or research results. It is important to supply a constant pulsed magnetic field (M) of 2.3 mT to the growth plate (99). In the case where there is a lot of flesh in the knee area, a stronger pulse magnetic field (M) must be supplied so that 2.3 mT can be radiated to the growth plate. Conversely, when the volume of the knee area is small, the strength of the pulsed magnetic field (M) must be relatively reduced to radiate 2.3 mT to the growth plate.

In order to supply a pulsed magnetic field (M) of constant intensity of 2.3 mT regardless of the volume of the knee in this way, as shown in FIG. 4, a sensing coil (or sensing unit) is placed in the middle of the right and left PEMF coils 300 and 310 ( 320) can be installed to indirectly evaluate the volume of the knee. The magnetic field (M) formed by the right and left PEMF coils (300, 310) changes the degree of interference depending on the knee volume, and the knee volume through the change in the strength of the magnetic field (M) received through the sensing coil 320 can be predicted indirectly. That is, if the knee volume is large, the radiated magnetic field (M) is absorbed by the knee a lot, the interference is small, and the magnetic field strength received by the sensing coil 320 is small. Conversely, if the knee volume is small, the magnetic field (M) is absorbed by the knee As the amount used becomes small and the interference becomes relatively large, the strength of the magnetic field received by the sensing coil 320 increases. Therefore, the control device according to the embodiment of the present invention can determine the volume of the knee based on the sensing signal of the sensing coil 320, and can adjust the PWM control signal for generating the pulsed magnetic field based on this. For example, the duty (ratio) of the pulse width can be adjusted. For example, an induced current may be generated in the sensing coil 320 by the surrounding right and left PEMF coils 300 and 310 . Accordingly, when measuring the amount of electric current, that is, the amount of electric charge or measuring the voltage according to the induced current, it may be possible to measure the strength of the magnetic field generated in the surrounding right and left PEMF coils 300 and 310 .

5 is a block diagram illustrating a detailed structure of the growth plate stimulation apparatus for mounting a chair of FIG. 1 .

As shown in FIG. 5 , the growth

plate stimulation apparatuses

100 and 110 for mounting a chair according to an embodiment of the present invention are, for example, a driving device 110 , a power supply unit 400 , a control unit 410 , and a (pulse) magnetic field generation. part or all of the unit 420 and the sound output unit 430 . Of course, it may further include a user interface unit for receiving a user command, a storage unit for storing data, and the like.

Herein, “including some or all” means that some components such as the sound output unit 430 are omitted to configure the driving device 110 or some components such as the control unit 410 are configured with the pulse magnetic field generator 420 ), which means that it can be configured by being integrated with other components, such as, and will be described as including all in order to help a sufficient understanding of the invention.

The power supply unit 400 may provide the control unit 410 with power from a replaceable battery pack inserted from the outside of the body unit 100 as shown in FIG. 1 . In addition, the power supply unit 400 may further include a voltage monitoring circuit (eg, a protection circuit) for monitoring the voltage of the battery pack.

The control unit 410 is responsible for overall control of the voltage supply unit 400, the pulse magnetic field generator 420, and the sound output unit 430 constituting the driving device 110 of FIG. 5 . For example, the control unit 410 may generate a PWM voltage signal (or control signal) for controlling the pulse magnetic field generator 420 by using the power of the power supply unit 400 . Of course, the control unit 410 includes or interlocks with an oscillator that generates a voltage pulse, and may generate a PWM voltage signal using this, so the embodiment of the present invention will not be particularly limited to any one form.

The control unit 410 may provide a PWM voltage signal of a specified duty to the pulsed magnetic field generator 420 , for example, based on the received sensing signal by receiving a sensing signal from a sensing coil constituting the pulsed magnetic field generating unit 420 . to adjust the duty of the PWM voltage signal. Typically, the user's knee volume is predicted and more accurately determined, and the duty of the PWM signal is adjusted based on this. For example, data on the knee volume of users may be stored in a memory in the controller 410 or a separate storage unit (not shown) and used. Alternatively, it is possible to store and use the generation information of the control signal for the knee volume for each user during the initial operation. In other words, when there are two children in the home, if two children need to be recognized, the pulse signal may be generated after storing the relevant information in the memory. For example, if child A generates a pulse signal with a duty ratio of 30% according to the degree of obesity or knee volume, child B may generate a pulse signal with a duty ratio of 45%.

In addition, when the pulsed magnetic field generator 420 is configured to include a low-frequency and high-frequency composite coil as in FIG. 3 , the controller 410 may apply a high-frequency signal, that is, a voltage to the loop antenna 201, and a PEMF coil. A low-frequency voltage may be applied to the 210 , and high-frequency and low-frequency signals may be selectively used for growth care of children or adolescents.

Furthermore, the control unit 410 may receive a user command through a user interface unit including a menu button, a touch screen, a microphone for receiving a voice command, and the like, and may perform an operation according to an operation time through this. One of 1, 2, 3, or 4 hours of operation time can be selected, and the power is automatically cut off after operation. For this purpose, an automatic timer may be included. The automatic timer may be configured in hardware, but may be configured in software, so it will not be particularly limited to any one form.

The pulsed magnetic field generator 420 may have the same configuration as in FIGS. 3 and 4 . In other words, the pulsed magnetic field generator 420 basically has a sensing coil 320, and the coils configured on both sides may include a loop antenna pattern for receiving a high-frequency signal as in FIG. 3, but may be omitted. may be Therefore, in the embodiment of the present invention, it will not be particularly limited to whether the pulsed magnetic field generator 420 includes a loop antenna.

The pulsed magnetic field generator 420 is controlled by the controller 410 and generates a pulsed magnetic field having a specified magnetic field strength according to a PWM pulse signal or a pulse voltage provided by the controller 410 . A pulsed magnetic field is a time-variant magnetic field. That is, the magnetic field is generated discontinuously with respect to the change in time. However, it can be seen that it occurs continuously for a certain period of time. In the case of non-medical home health care, less than 0.1mT is used for pain relief with microscopic low intensity. In addition, a low intensity of 0.1 to 0.5 mT may be suitable for height growth care application. In an embodiment of the present invention, a pulsed magnetic field of 2.3 mT may be supplied to the growth plate, and of course this may be adjusted according to the user's knee volume. In other words, in the embodiment of the present invention, the growth plate is continuously supplied with a magnetic field strength of 2.3 mT regardless of the volume based on research results, etc., but this designation value may be changed at will.

In addition, the pulsed magnetic field generator 420 includes a sensing unit such as a sensing coil 320 as shown in FIG. 4 . The sensing coil 320 may detect the state of the magnetic field generated by the pulsed magnetic field coils 300 and 310 provided on both sides, and, for example, if a Hall sensor is provided, detects a disconnection and a defective state of the coil, and generates an appropriate magnetic field. It may be possible to monitor for formation. For example, in the embodiment of the present invention, the magnetic field generation state of the pulsed magnetic field coils 300 and 310 may be sensed using an induced current induced in the sensing coil 320 .

The sound output unit 430 includes a speaker and performs a voice guidance operation. The sound output unit 430 may guide various voices related to, for example, an operation mode, use time, charging, etc. under the control of the controller 410 .

6 is a block diagram illustrating another detailed structure of the growth plate stimulation apparatus for mounting a chair of FIG. 1 .

The growth plate stimulation apparatus for mounting a chair of FIG. 6 , more precisely, the driving device 110 ′ thereof is not significantly different from the driving device 110 of FIG. 5 . However, it can be seen that there is a slight difference in that the pulsed magnetic field generator 420 in FIG. 5 may include a separate pulsed magnetic field coil driver 500 as in FIG. 6 .

For example, the pulsed magnetic field coil driver 500 may include an oscillator and the like to generate a pulse voltage. In addition, the central controller 410 ′ controls the pulsed magnetic field coil driver 500 to adjust the pulse width so that a pulse signal, that is, the adjusted pulse voltage, is provided to the coil. For example, the central controller 410 ′ may instruct the pulse magnetic field coil driver 500 to adjust the pulse signal having a current duty of 50% to a duty of 30% based on the sensing signal through a control signal. Accordingly, the pulsed magnetic field coil driver 500 changes the duty, that is, changes the pulse voltage for changing the magnetic field strength, and outputs it to the coil.

Except for these points, since the driving device 110 ′ of FIG. 6 is not significantly different from the driving device 110 of FIG. 5 , other detailed information will be replaced with the above.

7 is a flowchart illustrating a driving process of a chair-mounted growth plate stimulation apparatus according to an embodiment of the present invention.

Referring to FIG. 7 together with FIG. 1 for convenience of explanation, the chair-mounted growth

plate stimulation apparatus

100, 110 according to an embodiment of the present invention includes a magnetic field generator including a magnetic field coil and a sensing unit mounted on a chair, and a sensing unit. The magnetic field generated by the magnetic field coil is sensed by the magnetic field coil (S600). For example, the magnetic field generator is a pulsed magnetic field generator that generates a pulsed magnetic field, and generates a pulsed magnetic field in a pulsed magnetic field coil of the pulsed magnetic field generator, and the sensing unit of the pulsed magnetic field detects a pulsed magnetic field generated in the coil. Here, the sensing unit may include at least one of a Hall sensor and a sensing coil. Through the Hall sensor, it is possible to determine whether the coil is disconnected or defective. In addition, the sensing coil may be used not only to sense the state of the magnetic field, but also to determine the user's knee volume.

In addition, the chair-mounted growth

plate stimulation apparatus

100, 110 determines the state of the magnetic field based on the sensing signal of the sensing unit that senses the magnetic field, and adjusts the strength of the magnetic field generated in the magnetic field coil according to the determination result (S610). Pulse width modulation of the pulse voltage may be performed to adjust the pulse magnetic field. For example, since the pulse voltage, that is, the pulse signal is a discontinuous signal, if the pulse voltage is continuously applied by increasing the duty, the magnetic field strength may be increased. This can be seen as a method of continuously supplying current and increasing the amount of current, thereby increasing the magnetic field strength. That is, in the embodiment of the present invention, it can be seen that the magnetic field strength is adjusted by adjusting the frequency rather than controlling the amplitude, that is, the amplitude of the pulse voltage. Therefore, the strength of the magnetic field may be increased at the high frequency pulse voltage, and the strength of the magnetic field may be low at the low frequency pulse voltage. The pulse width may be variously adjusted based on the determination result. Of course, the embodiment of the present invention will not be particularly limited to the method of modulating the pulse width in order to adjust the magnetic field strength.

In addition to the above, the chair-mounted growth

plate stimulation apparatuses

100 and 110 of FIG. 7 can perform various operations, and since the other details have been sufficiently described above, those contents will be replaced.

For convenience of explanation, referring to FIG. 8 together with FIG. 1 , the growth

plate stimulation apparatuses

100 and 110 for mounting a chair according to another embodiment of the present invention may select a mode ( S700 ). The mode may be a shortcut key for performing a series of operations differently from each other. In other words, when the operating time is set as a mode, different types of operations may be performed according to the selected operating time.

When the mode is selected, the chair-mounted growth

plate stimulation apparatuses

100 and 110 drive the right and left PEMFs, that is, the coils of the coil unit accordingly (S710). A magnetic field is generated by passing an electric current through a pulsed magnetic field coil positioned to correspond to both knees of a user seated in a chair, for example, a child. The magnetic field (B) is generated perpendicular to the direction of the current (I).

For example, the chair-mounted growth

plate stimulation apparatuses

100 and 110 output a pulse voltage at a duty ratio of 50% (S720). Pulse voltage is output for 5 seconds. A duty of 50% means that during the period T, 50% of the magnetic field is applied and the remaining 50% is not applied. Since the pulse voltage is also referred to as a pulse signal, the term will not be particularly limited.

Then, the chair-mounted growth

plate stimulation apparatus

100, 110 determines the level of the sensing signal received through the sensing coil, for example, the received signal (S730). For example, since a processor such as a CPU or MPU recognizes digital information, the level of the received signal may be determined through, for example, binary bit information converted to digital. For example, the received signal level may be the amount of current sensed by the sensing coil or data obtained by converting the voltage into binary bits.

In addition, the chair-mounted growth

plate stimulation apparatus

100, 110 calculates a ratio to the reference area (S740). Here, it can be seen that the “ratio to the reference area” is determined, for example, to adjust the duty ratio. The magnetic field strength per unit area can be calculated.

The chair-mounted growth

plate stimulation apparatuses

100 and 110 output adjusted pulse voltages to the right and left PEMF coils to generate a magnetic field of adjusted strength by varying the duty based on the calculation result (S750. This operation is performed for 1 minute For example, the chair-mounted growth

plate stimulation apparatus

100, 110 determines the user's knee volume, that is, determines the ratio to the reference area at that time, and adjusts the duty ratio of the pulse signal according to the determination result. Thus, the magnetic field can be output accordingly.

In summary, FIG. 8 is a sensing and feedback operation using a sensing coil, and when an operation mode (eg, normal mode 1 hour, intensive mode 15 minutes) is selected with a switch, the right and left PEMF coils are output at 50% duty for 3 seconds export

And the magnetic field received from the sensing coil for 3 seconds is amplified through the amplifier and converted into a DC level signal through the RC filter, and the level is read through the ADC of the MCU.

Since the output strength of the pulsed magnetic field received by the sensing coil must be kept constant at 2.3mT, the duty is continuously varied to match the received signal level to 2.3mT.

When the signal level of the sensed magnetic field is less than 2.3mT, the duty is increased, and when the signal level is greater than 2.3mT, the duty is decreased.

Repeat the PEMF pulse output intensity intensity adjustment process by the sensing coil every 1 minute.

In addition to the above, the chair-mounted growth

plate stimulation apparatuses

100 and 110 of FIG. 8 can perform various operations, and since other details have been sufficiently described above, those contents will be replaced.

On the other hand, even though it has been described that all components constituting the embodiment of the present invention are combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, although all the components may be implemented as one independent hardware, some or all of the components are selectively combined to perform some or all of the functions of the combined hardware in one or a plurality of hardware program modules It may be implemented as a computer program having Codes and code segments constituting the computer program can be easily inferred by those skilled in the art of the present invention. Such a computer program is stored in a computer-readable non-transitory computer readable media, read and executed by the computer, thereby implementing an embodiment of the present invention.

Here, the non-transitory readable recording medium refers to a medium that stores data semi-permanently and can be read by a device, not a medium that stores data for a short moment, such as a register, cache, memory, etc. . Specifically, the above-described programs may be provided by being stored in a non-transitory readable recording medium such as a CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, and the like.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

** Explanation of symbols

100: main body 101: bracket

110, 110': driving device 111, 400: power supply

113: power button unit 115, 430: sound output unit

200: substrate 201: antenna unit

202: connector part 210: coil part

220: cable 300: first pulse magnetic field coil (negative)

310: second pulse magnetic field coil (part) 320: sensing coil

410: control unit 420: pulse magnetic field generator

Claims

a magnetic field generating unit including a magnetic field coil mounted on a chair and a sensing unit sensing a magnetic field generated from the magnetic field coil; and

A control unit that determines the state of the magnetic field based on a sensing signal of the sensing unit that senses the magnetic field, and adjusts the strength of the magnetic field generated in the magnetic field coil according to the determination result;

A growth plate stimulation device for mounting a chair, including.
According to claim 1,

The magnetic field generating unit includes a first magnetic field coil unit and a second magnetic field coil unit mounted on the chair at a predetermined interval to receive a pulse voltage, respectively,

The sensing unit is provided between the first magnetic field coil unit and the second magnetic field coil unit to monitor a state of a magnetic field.
3. The method of claim 2,

The sensing unit includes a Hall sensor or a sensing coil,

The controller determines the volume of the knee of the user seated in the chair by checking the change in the strength of the magnetic field based on the sensing signal, and adjusts the strength of the magnetic field based on the determined volume. .
4. The method of claim 3,

The control unit, a chair-mounted growth plate stimulation apparatus for adjusting the strength of the magnetic field so that a pulse magnetic field having a preset strength of 2.3 millitesla (mT) is continuously supplied to the growth plate of the knee.
4. The method of claim 3,

The control unit is a chair-mounted growth plate stimulation apparatus for adjusting the duty of PWM (Pulse Width Modulation) voltage signals respectively applied to the first magnetic field coil unit and the second magnetic field coil unit to adjust the strength of the magnetic field .
sensing, by a magnetic field generator including a magnetic field coil mounted on a chair and a sensing unit, the magnetic field generated from the magnetic field coil by the sensing unit; and

Step, by a control unit, determining the state of the magnetic field based on the sensing signal of the sensing unit sensing the magnetic field, and adjusting the strength of the magnetic field generated in the magnetic field coil according to the determination result;

A method of driving a growth plate stimulation device for mounting a chair, including.
7. The method of claim 6,

The magnetic field generating unit includes a first magnetic field coil unit and a second magnetic field coil unit mounted on the chair at a predetermined interval to receive a pulse voltage, respectively,

The sensing unit is provided between the first magnetic field coil unit and the second magnetic field coil unit to monitor a state of a magnetic field.
8. The method of claim 7,

The sensing unit includes a Hall sensor or a sensing coil,

The adjusting step is

determining the volume of the knee of the user seated in the chair by checking the change in the strength of the magnetic field based on the sensing signal; and

Adjusting the strength of the magnetic field based on the determined volume;

A method of driving a growth plate stimulation device for mounting a chair, including.
9. The method of claim 8,

The adjusting step is

A method of driving a chair-mounted growth plate stimulation apparatus for adjusting the strength of the magnetic field so that a pulse magnetic field having a preset strength of 2.3 millitesla (mT) is continuously supplied to the growth plate of the knee.
9. The method of claim 8,

The adjusting step is

A method of driving a chair-mounted growth plate stimulator for adjusting the duty of PWM voltage signals respectively applied to the first magnetic field coil unit and the second magnetic field coil unit to adjust the strength of the magnetic field.