KR20170089200A - Handheld bone mineral density measurement device using phalanges - Google Patents

Handheld bone mineral density measurement device using phalanges Download PDF

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KR20170089200A
KR20170089200A KR1020160009302A KR20160009302A KR20170089200A KR 20170089200 A KR20170089200 A KR 20170089200A KR 1020160009302 A KR1020160009302 A KR 1020160009302A KR 20160009302 A KR20160009302 A KR 20160009302A KR 20170089200 A KR20170089200 A KR 20170089200A
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natural frequency
bone density
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KR101781896B1 (en
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박경수
도현동
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가천대학교 산학협력단
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4504—Bones
    • A61B5/4509—Bone density determination
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
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    • A61B5/4869—Determining body composition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6898—Portable consumer electronic devices, e.g. music players, telephones, tablet computers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
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Abstract

A handheld bone densitometer using a phalanx is disclosed. The handheld bone densitometry apparatus according to an embodiment of the present invention includes a body portion having an insertion portion into which a finger or a toe of a subject to be measured is inserted; A vibration applying member which is embedded in the body and is located at one side of the insertion portion and applies vibration to the object to be measured; A vibration measuring member disposed on the other side of the insertion portion to measure a change in vibration of the measurement subject; And a signal processing unit for receiving the vibration change measured by the vibration measuring member, measuring the natural frequency of the measured subject, and calculating the bone density of the measured subject based on the natural frequency.

Description

HANDHELD BONE MINERAL DENSITY MEASUREMENT DEVICE USING PHALANGES BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone density measuring apparatus, and more particularly to a handheld bone density measuring apparatus using a phalanx.

Aging-related diseases (such as cerebrovascular disease, cardiovascular disease, cancer, and skeletal disease) are increasing in the age of aging. The number of patients diagnosed with osteoporosis, which is a disease with a decrease in bone density, also increased significantly. Osteoporosis is classified as basic diseases such as fractures and back pain of elderly people. Early diagnosis and prevention of osteoporosis is very important.

There are five types of measurement devices for diagnosing existing osteoporosis. (Measurement method using X-ray), DXA (measurement method using dual X-ray), QUS (measurement method using ultrasonic waves), QMR (measurement method using magnetic force), QCT It is.

However, these existing measuring devices are not suitable for high cost (QMR, QCT), excessive installation space (DXA), high measurement accuracy (RA, QUS) And the like. Therefore, research and development are being carried out to improve these disadvantages.

Patent Literature: Korean Patent Laid-Open Publication No. 2013-0021964 (published on Mar. 03, 2013)

The present invention relates to a hand held bone densitometer which is relatively inexpensive in cost of bone density examination, is formed in a handheld shape, does not require an excessive installation space, is not harmful to health because the subject is not exposed to radiation, Measuring device.

In addition, a body composition analyzing apparatus provided with the bone density measuring apparatus is further provided.

According to an aspect of the present invention, there is provided a blood pressure monitor comprising: a body portion having an insertion portion into which a finger or a toe of a subject to be measured is inserted; A vibration applying member which is embedded in the body and is located at one side of the insertion portion and applies vibration to the measured object; A vibration measuring member disposed on the other side of the insertion portion to measure a change in vibration of the measured object; And a signal processing unit for receiving the change in vibration measured by the vibration measuring member and measuring a natural frequency of the measured subject and calculating a bone density of the measured subject based on the natural frequency, Can be provided.

At this time, a vibration output end for outputting vibration is formed at the end of the vibration applying member, and a center hole may be formed at one side of the insertion unit such that the vibration output end is exposed to the outside.

Further, it may further include a vibration-proof member disposed on both sides of the insertion portion.

Further, the vibration measuring member may be selected from a piezoelectric sensor, a pressure sensor or an accelerometer.

The apparatus may further include at least one guide portion extending from the body portion to surround the insertion portion, the at least one guide portion gripping the measurement object.

According to another aspect of the present invention, there is provided a body measuring apparatus comprising: a body portion including a bottom portion on which a finger or a toe of a subject to be measured is placed, and at least one claw portion coupled to an upper portion of the bottom portion to receive the subject; A vibration applying member located on an outer surface or inside of the bottom portion and applying vibration to the measured object; A vibration measuring member provided on the ring portion to closely contact the measured object and measuring a change in vibration of the measured object; And a signal processor for receiving a change in vibration measured in the electromyographic system and measuring a natural frequency of the measured subject and calculating a bone density of the measured subject based on the natural frequency, .

In this case, the signal processing unit may include: a natural frequency measurement module for performing a fast Fourier transform process on the vibration change received from the accelerometer and measuring a natural frequency through frequency analysis of a waveform; And a bone mineral density calculation module for calculating the bone mineral density based on the natural frequency, the length and the thickness of the subject to be measured.

The signal processing unit may further include a control signal generation module for generating a control signal for driving the vibrator or controlling the magnitude of vibration and transmitting the control signal to the vibrator.

Further, the BMD calculating module can calculate the BMD according to the following equations (1) and (2).

[Formula 1]

Figure pat00001

E is 25 GPa,? Is 1.875104, d 2 is the height of the middle node constituting the finger or toe, and L is the length of the entire finger or toe.

[Formula 2]

Figure pat00002

In Equation (2), l 1 , l 2 , and l 3 are the height of the first bar, the middle bar, the end bar, and d 1 , d 2 , and d 3 , respectively, of the finger or toe.

In this instance, the bone density calculation module is the [formula 1] and [formula 2] of the l 1, l 2, l 3 is L / 3, d 1: d 2: d 3 is 0.89d 2: d 2: 1.12 d 2 to calculate the bone mineral density.

According to another aspect of the present invention, there is provided a power generating apparatus comprising: a main body portion having a power generating pole formed on an upper surface thereof; A bar-shaped hand electrode part connected to the body part by a cable and having a hand electrode formed on a surface thereof; And a hand-held bone mineral density measuring device provided to the body part or the hand electrode part.

The handheld bone densitometry apparatus according to embodiments of the present invention can calculate the bone density with only the natural frequency value measured through the vibration and the length and height (thickness, diameter) of the measured subject, This is easy. In addition, since a bone density generating device can be constituted by a handheld type, an excessive installation space is not required, and it can be used in connection with a conventional body composition analyzer and the like, and the bone density can be measured harmlessly to the human body.

1 is a perspective view schematically illustrating a handheld bone densitometer according to an embodiment of the present invention.
FIG. 2 is a diagram further illustrating a form in which a finger of a subject to be measured is inserted into the handheld bone densitometer of FIG. 1 and a guide unit. FIG.
3 is a block diagram showing the configuration of the signal processing unit.
4 is a diagram showing an example of an FFT graph.
5 is a diagram for explaining input values of [Equation 1] and [Equation 2].
6 is a perspective view schematically showing a handheld bone densitometer according to another embodiment of the present invention.
7 is a schematic view of a body composition analyzing apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the following description is illustrative of the present invention, and the technical spirit of the present invention is not limited to the following description. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG. 1 is a perspective view schematically showing a handheld bone densitometer 100 (hereinafter, referred to as a BMD) according to an embodiment of the present invention. FIG. 2 is a perspective view of the BMD measuring apparatus 100 of FIG. And a guide unit 160. The guide unit 160 includes a guide portion 160,

1 and 2, the bone mineral density measuring apparatus 100 includes a body 110, a vibration applying member 120 (FIG. 2), a vibration measuring member 130, and a signal processing unit 140 (FIG. 2) .

The bone density measuring apparatus 100 measures the bone density of a subject to be measured by using vibration. At this time, the subject to be measured is the finger or the toe of the subject (the bone constituting the finger or the toe is called the phalanx). More specifically, vibration is applied to an object to be measured by using the vibration applying member 120 installed in the body 110, and the vibration change of the object to be measured is detected by a vibration measuring member 130). Similarly, the signal processing unit 140 incorporated in the body 110 receives the vibration change measured by the vibration measuring member 130 to measure a natural frequency of the measured object, The bone density of the subject to be measured is calculated. Meanwhile, the signal processing unit 140 may transmit a vibration generation control signal to the vibration applying member 120 to control the vibration of the vibration applying member 120. A detailed description of each of these configurations will be described later. As described above, the bone density measuring apparatus 100 can be manufactured as a single compact single unit by housing the vibration applying member 120, the vibration measuring member 130, and the signal processing unit 140 in the body 110 . Therefore, portability is high, and connection with other medical apparatuses can be facilitated.

The apparatus 100 for measuring bone density according to the present invention measures bone density using vibration instead of measuring bone density using conventional X-ray, ultrasonic waves, magnetic force, and radiation. The reason for this is to measure the natural frequency of the object to be measured. Natural frequency is a vibration frequency of a system or object (also called natural frequency) and is one of the characteristics inherent to an object. According to the modeling of the measured object, the measured natural frequency can be used to calculate the density of the measured object. The bone mineral density measuring apparatus 100 according to the present invention can calculate the bone density of the subject by inputting the natural frequency or the like measured using the modeling result of the subject or the finger or the toe of the subject. A detailed description will be given later.

The bone density measurement method based on the method of measuring the natural frequency using the vibration has various advantages. For example, the method of using vibration compared with the method using radiation is harmless to human body. In addition, in the case of using the vibration, it is possible to achieve miniaturization of the apparatus, no space for installing a large measuring instrument is required, and the measurement time is relatively short, so that the bone density test cost can be kept relatively cheap. In addition, since a low frequency (10 kHz or less) is used as compared with the case of using an ultrasonic wave of a high frequency (100 kHz or more), there is little possibility of thermal damage to an object to be measured.

On the other hand, an object to be measured of the bone mineral density measuring apparatus 100 according to the present invention is the finger or the toe of the subject. This is because the finger or the toe is an object to be measured which is suitable for a method using vibration. A finger or a toe corresponds to a region where the human body is relatively easy to apply vibration. Measurements can be easy for both the measurer and the measurer. And fingers or toes are relatively small compared to other parts of flesh and muscle. This is why it is easier to measure the natural frequency of the bones compared to the parts where the flesh and muscles are relatively large, such as the human arm or leg, and that is why the accuracy of the measurement can be improved. Furthermore, according to published studies, there is a 90% correlation between the fingers and the vertebrae at the low bone density and 82% between the fingers and the hip joint (F. cosman, B. Herrington, S. Himmelstin and R. Lindsay, "Radiographic Absorptiometry : A Simple Method for Determination of Bone Mass ", Osteoporosis, 1991). This is the reason for the diagnosis of osteoporosis through the calculation of the bone density of the finger.

Hereinafter, a specific configuration of the BMD calculation apparatus 100 will be described.

The bone density measuring apparatus 100 may include a body 110, a vibration applying member 120, a vibration measuring member 130, and a signal processing unit 140. And may further include an anti-vibration member 150 and a guide unit 160, which are additionally provided to the body 110.

The body 110 corresponds to the outer case of the BMD 100, and the shape of the body 110 is not specified. 1 and 2, the body 110 is shown in a box shape, but is not limited thereto. For example, the body 110 may have various shapes such as a cylindrical shape, a bar shape, and other unformed shapes. The size of the body 110 is not limited, and may be formed to have a length, a width, and a height of 20 cm or less, for example. The body portion 110 may be formed in a hollow shape. Therefore, the structure of the vibration applying member 120, the signal processing unit 140 and the like to be described later can be incorporated.

The body 110 may be formed with an insertion portion 111 into which a finger or a toe of the subject, which is the subject 10 to be measured, is inserted. The insertion portion 111 may be formed to penetrate a part of the body 110. Therefore, the finger or the toe of the subject can be completely inserted through the insertion portion 111. [ For example, FIG. 2 shows a finger of a subject to be inserted in one direction of the body part 110 through the insertion part 111, and the end of the finger penetrates in the other direction of the body part 110 . The size of the insertion portion 111 is such that the finger and / or the toe of the subject can be inserted and penetrate through the body 110, and is not limited to a specific value. The shape of the insertion portion 111 is also not limited. In FIGS. 1 and 2, the insertion section 111 is shown in a rectangular shape in cross section. However, the insertion section 111 may be formed in various shapes such as circular, polygonal, and other unformed shapes. For example, when the finger or the toe of the subject is inserted into the insertion portion 111, the insertion portion 111 can be made to have a high degree of contact with the inner surface of the insertion portion 111 have.

The vibration applying member 120 functions to apply vibration to the finger or toe of the subject as the subject 10 to be measured (hereinafter, the description will be focused on the case where the subject 10 is the subject's finger) ). The vibration applying member 120 may be embedded in the body 110. For example, as shown in FIG. 2, the vibration applying member 120 may be embedded in the inner space of the body 110 at one side of the insertion portion 111.

The vibration applying member 120 may generate vibration on the finger or the toe of the subject and is not limited to a specific device. For example, the vibration applying member 120 may be a conventional vibrator, a piezoelectric actuator, or the like. Hereinafter, for convenience of explanation, the case where the vibration applying member 120 is a vibrating unit will be mainly described, and the same reference numerals will be used. The vibrator 120 is a device for generating vibration in an object or system, and may be classified into a mechanical type, an electric type, an electrohydraulic type, and the like depending on the operation mode. Of course, the vibrator 120 in this embodiment is not limited in any particular way.

The vibrator 120 is not limited to a specific shape, as long as it can apply vibration to an object to be measured. For example, the vibrator 120 may have a box-shaped body as shown in FIG. 2, and a vibration output terminal 121 for outputting vibrations may be formed at an upper center portion, but the present invention is not limited thereto. The vibration output terminal 121 can function to apply the vibration to an object (for example, an object to be measured) that is in contact with the object by vibrating in accordance with driving of the vibrator 120. For example, the vibration output stage 121 can apply a low-frequency vibration of 10 kHz or less to an object to be measured.

A center hole 111a is formed on the inner side surface of the insertion part 111 of the body part 110 so that the vibration output end 121 of the vibrator 120 is exposed to the outside on the side where the vibrator 120 is installed . That is, the body of the vibrator 120 is built in the body 110, and only the vibration output terminal 121 of the vibrator 120 is inserted into the center hole 111a formed in the insertion portion 111 of the body 110 Lt; / RTI > The size of the center hole 111a is not limited to a specific value as long as the vibration output terminal 121 can be exposed to the outside.

The vibration measuring member 130 is provided so as to be in contact with an object to be measured (a finger or a toe), and can measure a change in vibration of the object to be measured. The installation method is not limited, and may be a bolt connection or a combination using an adhesive. The vibration measuring member 130 may be disposed on the other inner side of the insertion portion 111 (a side facing the side where the vibrator 120 is installed). That is, the vibration measuring member 130 may be disposed in a direction opposite to the vibrator 120. The vibration measuring member 130 can convert an acceleration change occurring in the vibration of the measured object into an electrical signal and output it. The vibration measuring member 130 may transmit the measured vibration change to the signal processing unit 140. The transmission method may be wired or wireless.

The vibration measuring member 130 is not limited to a specific type as long as it is capable of measuring a change in vibration of an object to be measured. Examples of the vibration measuring member 130 include a piezoelectric sensor, a pressure sensor, and an accelerometer. For example, the case where the vibration measuring member 130 is an accelerometer will be briefly described. The accelerometer includes a fine structure. When the structure is inclined according to the acceleration direction, the resistance value is changed to change the value of the current flowing through the structure. The sensor recognizes the current change as acceleration and measures the vibration. 1 and 2, the vibration measuring member 130 is shown in the form of a plate, but the present invention is not limited thereto and may be formed in various shapes such as a cylindrical shape.

When the finger of the subject is inserted into the insertion part 111, the lower part of the subject to be measured 10 is inserted into the insertion part 111 of the vibrator 120 And is in contact with the vibration output terminal 121. The upper portion of the subject 10 to be measured is brought into contact with the vibration measuring member 130. In this case, since the vibration measuring member 130 is installed on the inner surface of the inserting portion 111, it can not move. Therefore, when the vibration outputting end 121 repeatedly advances and reverses to generate vibration, The measurement target 10 can be repeatedly pressed. That is, when the vibration output terminal 121 moves forward, the object to be measured 10 is pressed, and the upper portion of the object to be measured 10 is brought into close contact with the vibration measuring member 130. When the vibration output terminal 121 moves backward, the pressure of the measurement subject 10 is released, and the upper portion of the measurement subject 10 is released from the vibration measurement member 130. Therefore, when the vibration is output from the vibration output terminal 121, the measured object 10 receives the vibration, and the change in the vibration of the measured object 10 is caused by the vibration Can be measured by the measuring member 120.

The bone density measuring apparatus 100 may further include an anti-vibration member 150 disposed on both sides of the insertion portion 111 of the body 110. That is, as shown in FIGS. 1 and 2, the anti-vibration member 150 may be provided on both sides of the inserting portion 111 except for the side on which the vibrator 120 is mounted, Respectively. The anti-vibration member 150 may function to minimize the influence of the vibration measuring member 130 due to the vibration generated from the vibrator 120. This is because the vibration generated from the vibrator 120 can act as a noise in the vibration measurement member 130. The anti-vibration member 150 may be formed of a material such as vibration-proof rubber. Although the anti-vibration member 150 is shown as a plate in FIGS. 1 and 2, the anti-vibration member 150 is not limited thereto. For example, the anti-vibration member 150 may be formed to have a swollen shape at the center portion. In this case, the anti-vibration member 150 may function to support and fix the object 10 to be measured in both directions when the object 10 to be measured is inserted into the insertion portion 111.

The bone density measuring apparatus 100 may further include at least one guide unit 160 for holding the subject 10 to be measured. The guide part 160 may extend to the body 110 so as to be positioned around the insertion part 111. 2, the guide part 160 may be formed on the lower surface of the body part 110 and may extend from the periphery of the insertion part 111, and may be formed on the lower surface of the body part 1110 As shown in FIG. Therefore, when the object to be measured 10 is inserted into the insertion part 111 and passes through the body part 110, it can be supported by the guide part 160. Although FIG. 2 shows a pair of guide portions 160, the guide portion 160 may be provided only to support the measurement target 10 from below. 2, one or a pair of guide portions 160 may be provided on the upper surface of the body portion 110. In addition, The guide part 160 may be formed in a plate shape, but is not limited thereto, and may be formed without limitation as long as it can support the object 10 to be measured. The material of the guide portion 160 is not specified. Any material having a rigidity enough to support the object 10 to be measured can be used without limitation.

When the finger of the subject is inserted into the insertion portion 111, at least some of the portions of the finger other than the portion that is in close contact with the vibration output end 121 can be stably supported by the guide portion 160. Therefore, the fingers can be stably supported during the measurement, and the posture can be maintained. Otherwise, it is possible that the fingers will not maintain their initial posture while the measurement is in progress, which can affect the reliability of the measurement results (for example, when bending the finger during a measurement).

The signal processing unit 140 receives the vibration change measured by the vibration measuring member 130 and measures a natural frequency of the measured subject 10 and calculates a bone density of the measured subject 10 based on the natural frequency Function. The signal processing unit 140 may be embedded in the body 110. For example, the signal processing unit 140 may be installed in a space in which the body 120 of the body 110 is not installed, as shown in FIG. The signal processing unit 130 may not be embedded in the body 110 but may be disposed outside the body 110 in an independent form. When the signal processor 130 is embedded in the body 110, the entire apparatus can be manufactured as a single compact device.

The signal processing unit 140 may be electrically connected to the vibrator 120 and the vibration measuring member 130. The connection method may be a wired method or a wireless method. The signal processing unit 140 can generate and transmit a vibration control signal to the vibrator 120 and can receive the vibration change data of the measured object 10 from the vibration measurement member 130. [

3 is a block diagram showing the configuration of the signal processing unit 140. As shown in FIG. 3, the signal processing unit 140 may include a control signal generation module 141, a natural frequency measurement module 142, and a bone density calculation module 143. FIG.

The control signal generation module 141 may generate and transmit control signals to the vibrator 120 to perform functions such as vibration and vibration magnitude control of the vibrator 120. For example, the control signal generation module 141 may generate a control signal for controlling the driving driver of the exciter 120, and may transmit the control signal to the exciter 120. Meanwhile, the control signal may be transmitted to the oscillator 120 through an amplifier (not shown, which may be in the form of a printed circuit board) provided inside the body 110. The voltage value and the current value of the control signal are small and may not match the driving driver specification of the exciter 120. [ Such an amplifier is well known in an apparatus for processing an electric signal, and a detailed description thereof will be omitted. The amplifier can be installed at an appropriate position inside the body 110.

The natural frequency measurement module 142 can perform a fast Fourier transform process on the vibration change received from the vibration measurement member 130 and measure the natural frequency through the frequency analysis of the waveform. After the fast Fourier transform process, a method of measuring a natural frequency through frequency analysis of a waveform is a known method. By performing fast Fourier transform, the vibration in a specific time domain can be transformed into a frequency band in the frequency domain (FFT graph), and the maximum value in the inflection domain of the frequency band can be extracted as the natural frequency. FIG. 4 shows an example of the FFT graph. In this example, the maximum value of 1,072 Hz in the frequency band of the frequency band shown in FIG. 4 can be extracted as the natural frequency. On the other hand, in the above-mentioned natural frequency measurement, the frequency peak region of the waveform is firstly extracted within the first frequency range, and in the second frequency range including the frequency peak region and narrower than the first frequency range, By extracting the frequency peak region of the waveform secondarily, it is possible to enhance extraction accuracy and reliability of the natural frequency.

The bone density calculation module 143 may calculate the bone density based on the length and thickness of the subject to be measured or inputted separately from the natural frequency measured by the natural frequency measurement module 142. At this time, the bone density calculation module 143 can calculate the bone density according to the following equations (1) and (2).

[Formula 1]

Figure pat00003

[Formula 1] is a method of modeling a finger or a toe of a subject to be measured as a three-stepped beam, and using the beam theory (Euler-Bernoulli, uniform beam and free vibration conditions) As shown in Fig. In this case, Moment of Inertia uses the equivalent inertia. 5 is a diagram for explaining the input values of [Equation 1] and [Equation 2].

In Equation 1, ρ is the bone density of the subject (g / cm 2 or kg / m 3 ), E is the modulus of elasticity (N / m 2 ) . α is a constant and is 1.875104. d 2 means the height of the middle of the three fingers constituting the finger (or toe), and L means the length of the entire finger (see FIG. 5).

On the other hand, in Equation 1, I eq is an equivalent moment of inertia and is given by the following Equation 2:

[Formula 2]

Figure pat00004

The [formula 2] from l 1, l 2, l 3 are each finger (or toe) the structure first words in length, meaning the middle word length, kkeutmadi length and, d 1, d 2, d 3 are each finger (or Toe), the height of the middle node, and the height of the end node (where height is similar to "thickness" or "diameter"). And L is the length of the entire finger (or toe) (see FIG. 5).

[Expression 1], in [Expression 2] l 1, l 2, l 3 are all L / 3, d 1: d 2: d 3 is 0.89d 2: can be substituted with 1.12d 2: d 2 . This can be applied to speed up the calculation of the bone density because the inventors of the present invention calculate the results within the error range from the results of the examination of a plurality of subjects.

At least one of the control signal generation module 141, the natural frequency measurement module 142 and the bone density calculation module 143 constituting the signal processing unit 140 may be a computer readable recording medium Code or program. Here, the computer-readable recording medium may include any type of recording device that stores data that can be read by a computer system. The recording medium may be distributed to a network-connected system and stored as a computer- And can be executed.

The signal processing unit 140 further includes an interface for transmitting and receiving signals with the vibrator 120 and the vibration measuring member 130, a transmission and reception module, an IC circuit, a memory, and other control modules, a power system, an external port, (At least some of these configurations may be implemented in software form). And may have additional or omitted configurations other than those listed above, and may have different configurations as well. And the components listed above may perform functions that can be typically implemented in an electronic signal processing apparatus.

The bone density measuring apparatus 100 may further include an input / output device (not shown) and a storage device electrically connected to each other. The input / output device and the storage device include means for inputting length information and thickness information of a subject to be measured for bone density measurement, means for outputting a user interface capable of driving a vibrator or controlling vibrations to a screen, Means for generating graphics on the basis of measured values and outputting them to a screen, means for storing input information values and output information values, and the like, and the present invention is not limited thereto. For example, the input device may be a conventional input device such as a keyboard or a mouse, the output device may be a normal display device, and the storage device may be a conventional storage device (HDD or the like). The input / output device and the storage device may be a desktop computer, a handheld computer, a tablet computer, a mobile phone (or a smart phone), and the like.

In addition, the BMD measuring apparatus 100 may further include an alarm unit (not shown). The alarm unit may function to inform the outside when the bone density value calculated by the signal processing unit 140 is out of a predetermined range. The alarm unit may be electrically connected to the signal processing unit 140 and may operate in response to a control signal from the signal processing unit 140. At this time, the set range may be plural, and the alarm unit may inform the outside in a different manner according to the range. For example, when the calculated bone density corresponds to a first reference range and a second reference range different from the first reference range, the notification unit alerts them to each other with different sounds or lights different colors To the outside. In this way, if the notification method of the notification part is different for a plurality of reference ranges, the measurement result can be classified into danger, attention, and normal.

Hereinafter, a handheld bone densitometer 200 (hereinafter referred to as a BMD measuring apparatus) according to another embodiment of the present invention will be described. However, for the same or similar parts as those of the above-described embodiment, redundant description will be omitted, and differences will be mainly described.

6 is a perspective view schematically showing an apparatus 200 for measuring bone density according to another embodiment of the present invention. Referring to FIG. 6, the bone mineral density measuring apparatus 200 may include a body 210, a vibration applying member 220, a vibration measuring member 230, and a signal processing unit 240.

The body 210 forms an outer appearance of the BMD 200. In this embodiment, the body 210 has a bottom 211 on which the finger or the toe of the subject, And at least one annular portion 212 which is coupled to an upper portion of the bottom portion 211 and accommodates the measured object 10 (hereinafter, the description will be made with reference to a case where the measured object 10 is a finger box).

The bottom part 211 may be formed in a plate shape so that a finger or a toe can be stably placed, but is not limited thereto. For example, the bottom portion 211 may be formed in a plate shape having a predetermined curved surface. The bottom portion 211 may be formed to have a predetermined thickness. Therefore, the vibration applying member 220, the signal processing unit 240, and the like may be built in the bottom 211. In addition, the bottom portion 211 can function to hold the fingers stably while maintaining the posture while the measurement is being performed by supporting the measured object 10 from below.

The hook 212 may be coupled to the upper surface of the bottom 211 or integrally formed with the bottom 211. The annular portion 212 may be formed in the shape of "? "And the measured object 10 may be inserted into a space formed by the annular portion 212. [ In FIG. 6, the number of the hooks 212 is two, but the number of the hooks 212 is not limited to this and may have more or fewer numbers. As shown in FIG. 6, the measured object 10 (finger) may be inserted into the space formed by the hook 212 and supported by the bottom 211. The object to be measured 10 can be stably gripped by the bottom portion 211 and the loop portion 212 described above. The ring portion 212 may be formed of a vibration-proof material (for example, a vibration-proof rubber) so as to minimize the influence of the vibration-measuring member 230 by the vibration generated from the vibration-applying member 220.

The vibration applying member 220 functions to apply vibration to the measured object 10 and may be located on the outer surface or inside of the bottom portion 211. [ 6, when the vibration applying member 220 is positioned inside the bottom portion 211, the vibration output portion of the vibration applying member 220 may be exposed to the outside of the bottom portion 211, (Not shown) may be formed. Also, when the vibration applying member 220 is located on the outer surface of the bottom portion 211, the vibration applying member 220 is formed in a film shape and can give an electric stimulus to the phalanx muscles (for example, Lt; / RTI > The other description of the vibration applying member 220 is omitted because it is the same as or similar to that described in the above-described embodiment.

The vibration measuring member 230 may be disposed on the ring 212 and may be disposed to be in contact with the measured object 10. The vibration measuring member 230 can measure a change in vibration of the measured object. The vibration measuring member 230 may be installed on the central portion and the inner surface of the ring portion 212 and may be in close contact with the upper portion of the measured object 10. The description of the other vibration measuring member 230 is omitted because it is the same as or similar to that described in the above-described embodiment.

The signal processing unit 240 receives the vibration change measured by the vibration measuring member 230 and measures the natural frequency of the measured subject 10 and calculates the bone density of the measured subject 10 based on the natural frequency Function. The signal processing unit 240 may be embedded in the bottom part 211 as shown in FIG. 6, or may be separately arranged outside the body part 210. The description of the other signal processing unit 240 is omitted because it is the same as or similar to that described in the above-described embodiment. In this embodiment, unlike the above-described embodiment, the object to be measured 10 can be stably held by the shape of the body 210, and no separate guide part is required.

As described above, the handheld bone densitometry apparatus according to the embodiments of the present invention can calculate the bone density with only the natural frequency value measured through the vibration and the length and height (thickness, diameter) of the measured subject, Measurement time is fast and measurement is easy. In addition, since a bone density generating device can be constituted by a handheld type, an excessive installation space is not required, and it can be used in connection with a conventional body composition analyzer and the like, and the bone density can be measured harmlessly to the human body.

The present invention can additionally provide a body composition analyzing apparatus including the aforementioned handheld bone densitometer. 7 is a schematic view of a body composition analyzing apparatus according to an embodiment of the present invention. 7, the body composition analyzing apparatus comprises a main body 1 having a power generating electrode 2 formed on an upper surface thereof, a bar electrode 2 connected to the main body 1 through a cable (not shown) and a hand-held bone densitometer 100 mounted on the main body 1 or the hand electrode 2, as shown in FIG. In FIG. 7, the handheld bone densitometer 100 is coupled to the right side of the hand electrode unit 4, but is not limited thereto. The handheld bone densitometer 100 may be coupled to both the left, right, and left sides of the hand electrode unit 4, or may be coupled to the proper position of the body unit 1, unlike FIG. Since the handheld bone densitometer 100 is in accordance with the embodiments of the present invention described in FIGS. 1 to 6, detailed description thereof will be omitted.

The main body 1 may be provided with an input / output unit 3, and a control unit may be provided therein. The body information (for example, height, sex, age, etc.) of the subject can be input through the input / output unit 3 and the measurement result (body composition result and bone density measurement result) can be displayed. The control unit may function to receive, process, and process information from the generator electrode 2, the hand electrode 5, and the handheld bone densitometer 100. A known apparatus can be used for the body composition analyzing apparatus having such a configuration, and a detailed description thereof will be omitted. As described above, the handheld bone densitometry measuring apparatus 100 according to the embodiments of the present invention is formed in a handheld type, and can be used in connection with a conventional body composition analyzing apparatus, have.

Embodiments of the present invention have been described above. However, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. It will be understood that various modifications may be made in the invention, and that such modifications are also included within the scope of the present invention.

100, 200: Handheld bone densitometer
110, 210:
120, 220: vibration applying member
130, 230: vibration measurement member
140, and 240:

Claims (11)

A body portion having an insertion portion into which a finger or a toe of a subject to be measured is inserted;
A vibration applying member which is embedded in the body and is located at one side of the insertion portion and applies vibration to the measured object;
A vibration measuring member disposed on the other side of the insertion portion to measure a change in vibration of the measured object; And
And a signal processing unit for receiving the change in vibration measured by the vibration measuring member to measure a natural frequency of the measured subject and calculating a bone density of the measured subject based on the natural frequency. The method according to claim 1,
A vibration output end for outputting vibration is formed at an end of the vibration applying member,
And a center hole is formed at one side of the insertion portion such that the vibration output end is exposed to the outside. The method according to claim 1 or 2,
And an anti-vibration member disposed on both sides of the insertion portion. The method according to claim 1 or 2,
Wherein the vibration measuring member is selected from a piezoelectric sensor, a pressure sensor or an accelerometer. The method according to claim 1 or 2,
Further comprising at least one guide portion extending from the body portion to be positioned at the periphery of the insertion portion, the at least one guide portion holding the object to be measured. A body portion including a bottom portion on which a finger or a toe of a subject to be measured is placed, and at least one claw coupled to an upper portion of the bottom portion to receive the measured subject;
A vibration applying member located on an outer surface or inside of the bottom portion and applying vibration to the measured object;
A vibration measuring member provided on the ring portion to closely contact the measured object and measuring a change in vibration of the measured object; And
And a signal processing unit for receiving the change in vibration measured by the electromyographic system and measuring a natural frequency of the measurement subject and calculating a bone density of the measurement subject based on the natural frequency. The method according to claim 1 or 6,
The signal processing unit,
A natural frequency measurement module for performing a fast Fourier transform process on the vibration change received from the accelerometer and measuring a natural frequency through frequency analysis of a waveform; And
And a bone density calculating module for calculating a bone density based on the natural frequency, the length and the thickness of the subject to be measured. The method of claim 7,
Wherein the signal processing unit further comprises a control signal generation module for generating a control signal for driving the vibrator or controlling the magnitude of vibration and transmitting the control signal to the vibrator. The method of claim 7,
The bone-density calculating module calculates the bone density according to the following equations (1) and (2).
[Formula 1]
Figure pat00005

E is 25 GPa,? Is 1.875104, d 2 is the height of the middle node constituting the finger or toe, and L is the length of the entire finger or toe.
[Formula 2]
Figure pat00006

In Equation (2), l 1 , l 2 , and l 3 are the height of the first bar, the middle bar, the end bar, and d 1 , d 2 , and d 3 , respectively, of the finger or toe. The method of claim 9,
The bone density calculation module is the [formula 1] and [Expression 2] to l 1, l 2, l 3 is L / 3, d 1: d 2: d 3 is 0.89d 2: 1.12d to 2: d 2 Thereby calculating a bone density. A body portion having a power generating pole formed on an upper surface thereof;
A bar-shaped hand electrode part connected to the body part by a cable and having a hand electrode formed on a surface thereof; And
The body composition analyzing apparatus according to claim 1 or 6, wherein the body part or the hand electrode part is provided with a hand-held bone densitometer.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101890546B1 (en) * 2018-01-04 2018-08-22 신성대학 산학협력단 Diagnostic device for low back pain -based electromyogram

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101890546B1 (en) * 2018-01-04 2018-08-22 신성대학 산학협력단 Diagnostic device for low back pain -based electromyogram

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