WO2018080005A1

WO2018080005A1 - Precise pulse measurement device

Info

Publication number: WO2018080005A1
Application number: PCT/KR2017/009590
Authority: WO
Inventors: 김영민; 김재욱
Original assignee: 한국 한의학 연구원
Priority date: 2016-10-31
Filing date: 2017-09-01
Publication date: 2018-05-03
Also published as: KR20180047562A; KR101927457B1

Abstract

The present invention relates to: a pulse measurement device, vertically putting pressure on the radial artery, for precise pulse measurement; and a method therefor. The pulse measurement method comprises "an initialization step," "a pulsation position display step," "a pressure direction search and control step," and "a pressure and maximum pulse wave search step." The "pressure direction search and control step" is characterized by a tilt sensor to which presented mathematical formula 1 is applied, and a controller algorithm to which mathematical formula 2 is applied. When the present algorithm is used, convergence is made within an error band more rapidly than that of a conventional method.

Description

Precision pulse measuring device

The present invention relates to a precision pulse measuring device, and more particularly, to a method for measuring a tilt of an X-axis and a Y-axis using a tilt sensor, and calculating an amount of rotation based on the change of a tilt to search for an optimized pressure direction. It is about.

In oriental medicine, a pulse system is used to diagnose a disease of a subject by measuring pulses of a specific location on an artery located inside the wrist, such as a village, a tube, and a chuck. Specifically, the pulse is mainly used to measure the pulse by raising the finger on the patient's village, duct, and chuck area, pressing the finger hard enough to stop the pulse, and then slowly releasing the finger. As a result, the pressure at which the pulse starts to run and disappears is different from each other. Accordingly, since the accuracy of the pulse is highly dependent on the experience and skill of the diagnoser, the accuracy of the pulse cannot be secured.

This pulse method is to measure the harmony of blood and blood flow in the human body to measure the functional presence of the twelve, and to detect the strength and cycle of the pulse to determine the state of health.

However, this method requires long-term medical experience to become proficient, and it is difficult to systematically organize various conditions according to the constitution of the patient because the treatment of the patient's condition or the severity of the disease depends on the sense of the finger. There is also concern about misdiagnosis. In addition, in order to prescribe according to the patient's constitution, objective data are required, but it is also true that the specification is difficult.

In order to solve this problem, a mechanical measuring device for measuring the pulse is developed and used in practice. However, in the conventional pulse measuring apparatus, the measurement time becomes long due to display inconvenience of the pulsating position, and there is a limit in that it is difficult to obtain an accurate pulse wave due to incorrect initialization. In addition, since it has a structure that is difficult to press in the vertical direction on the skin surface, a slip occurs during measurement, which is difficult to fix to the radial artery, and also has a disadvantage in that pain occurs during deep pressing. In particular, no device or method has been proposed to solve the problem that the accuracy of the pulse wave fluctuates greatly as the pressing direction is changed even in the same pulsating position.

Precision pulse measuring apparatus according to an embodiment of the present invention, the pulse sensor for measuring the user's pulse; An inclination sensor for measuring an X-axis inclination change value and a Y-axis inclination change value according to the position of the pulse sensor; And a controller configured to calculate the rotation amount of the pulse sensor using the X-axis gradient change value and the Y-axis gradient change value, and the Mac sensor moves based on the rotation amount. In measuring, it is possible to measure the vein more precisely than the conventional method.

The inclination sensor is a sensor for a precision pulse measurement method that measures the X-axis gradient change value and the Y-axis gradient change value based on Equation 1 below.

here,

Is the X-axis gradient change value,

Is the inclination change value of the Y axis, D (+ Xe) is the inclination change value when moving by + D distance to the Xe axis, and D (-Xe) is the inclination change value when moving by -D distance in the Xe axis, D (+ Ye) is a tilt change value when moving by + D distance on the Ye axis, and D (-Ye) is a tilt change value when moving by -D distance on the Ye axis.

The change in the slope of the X-axis is obtained by subtracting the magnitude of the change in the slope of the X-axis by moving the + D distance by the distance of the -D distance from the Xe-axis. Similarly, the change in the slope of the Y-axis may be obtained by subtracting the change in the slope of the -Y distance from the magnitude of the change in the slope of the Y axis by + D distance.

The controller is a controller for a precision pulse measuring method that calculates the amount of rotation based on Equation 2 below.

here,

Is the amount of rotation about the X axis,

Is the amount of rotation about the Y axis, and P (

) Is the gain for the X axis, and P (

) Is the gain on the Y axis, k _total is the total number of iterations, and k _sr may be the start of the stable range.

Amount of rotation about the X axis

Is the gain value P (X)

) And X-axis tilt change

Is multiplied by If the X-axis tilt change

Is greater than the steady range, the gain value for the X axis, P (

) Can be set to P. other

If is less than or equal to the steady range, then the gain value for the X axis, P (

) Can be defined as P / (2 + total repetitions-starting point of stable range).

Amount of rotation about the Y axis

Amount of rotation about the X axis

Can be determined in the same manner as Using this method, when the controller calculates the rotation amount, it is possible to reach the target pressurization angle with a smaller number of repetitions faster than before.

The movement control unit of the pulse measuring apparatus may move the pulse measuring apparatus by finding the pulsation position of the measurer using the multi-line laser light.

A method of measuring a pulse using the pulse measuring apparatus, the method comprising: moving a position of a pulse measuring unit for measuring a pulse of a subject in a plurality of predefined axial directions; Measuring the vein through a vein sensor for measuring the vein of the subject corresponding to the position determined by the moving step; Measuring the change amount of the inclination through an inclination sensor which measures the change amount of the inclination corresponding to the position; And determining position control by the movement control unit according to the rotation amount of the inclination sensor calculated based on the measured inclination change amount.

It can be carried out including.

It can be repeated several times for measuring the pulse in the above order, in order to reduce the number of repetitions can be applied to the algorithm of the equations (1) and (2).

1 is a view showing each axis of the measuring device.

2 is a view showing a sensor unit.

3 shows a sensor unit according to an embodiment.

4 illustrates a pressing direction search process according to an exemplary embodiment.

5 is a graph showing convergence characteristics according to an embodiment.

6 is a graph to which an algorithm according to an embodiment is applied.

7 is a signal graph of pulse wave according to an embodiment.

8 is a signal graph of pulse waves for each tilted angle.

9 is a flowchart according to one embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of rights is not limited or limited by these embodiments. Like reference numerals in the drawings denote like elements.

The terminology used in the description below has been selected to be general and universal in the art to which it relates, although other terms may vary depending on the development and / or change in technology, conventions, and preferences of those skilled in the art. Therefore, the terms used in the following description should not be understood as limiting the technical spirit, and should be understood as exemplary terms for describing the embodiments.

In addition, in certain cases, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the corresponding description. Therefore, the terms used in the following description should be understood based on the meanings of the terms and the contents throughout the specification, rather than simply the names of the terms.

1 is a view showing a three-dimensional axial direction of the pulse measuring apparatus according to an embodiment of the present invention. 1, X ₁ axis and Y ₁ axis of the pulse measuring apparatus according to an embodiment of the present invention means the X rotation direction and the Y rotation direction, respectively. X ₂ axis and Y ₂ axis mean Xe translation direction and Ye translation direction, respectively. The Z ₂ axis represents the direction of Ze translation, and the Z ₃ axis represents the direction of Zo translation. Finally, the X ₃ and Y ₃ axes represent the Xo and Yo translation directions, respectively. The direction is only a direction according to an embodiment, the difference according to the rotation of the reference direction can be interpreted the same as the present invention.

2 and 3 are diagrams illustrating a sensor unit, and each configuration of the sensor unit is disclosed. 2 and the sensor unit in accordance with an embodiment Referring to FIG. 3 (200, 300) is a spring (210, 310), the universal joint _{(220, 320), X 2} -Y 2 -axis tilt sensor (230, 330), and

Pulse sensors

240 and 340 may be configured. The spring of the sensor unit serves to allow the X ₂ -Y ₂ axis tilt sensor connected through the universal joint to move freely in the X ₂ and Y ₂ directions. The X ₂ -Y ₂ is associated with the vein sensor axis tilt sensor may measure the vein in a direction perpendicular to the radial artery.

4 is a view showing the progress according to the pressing direction search algorithm of the pulse sensor unit (200, 300). According to an exemplary embodiment, when the tilt sensor using Equation 1 and the controller applying Equation 2 are used, the stabilization step is faster than the conventional case.

5 is a graph showing convergence characteristics when the algorithms of

Equations

1 and 2 are not applied. Looking at Figure 5 it can be seen that the time to enter the stabilization step becomes faster as the gain is increased.

6 is a graph showing convergence characteristics when the algorithms of

Equations

1 and 2 are applied. Referring to FIG. 6, it can be seen that the time to enter the stabilization phase and the convergence time are faster in the case where the algorithm is applied (Gain16 / 9). As a gain value of the initial application form by the algorithm, the gain starts at 16, and a total of nine stage stages enter the stabilization stage directly from the second.

7 is a signal graph of pulse waves when the sensor is pressed perpendicular to the radial artery.

8 is a graph showing the pulse wave distortion phenomenon when the sensor is pressed vertically to the radial artery and when pressed at an angle of 3 degrees. If the difference is only 3 degrees compared to the reference angle of 0 degrees, it can be seen that the difference occurs in the magnitude of the maximum amplitude.

9 is a step-by-step flowchart of the pulse measuring method. Looking at Figure 9 'initialization' step the three-axis stage and the pressurized motor is moved to the home position, the two-axis inclination sensor is initialized so that all two-axis rotation motor is located at 0 degrees. In the 'pulsation position display' step, since the location of the radial artery and radial is generally hard to identify with the naked eye, a process of searching for a location without anatomical information of the radial artery and radial location is necessary. The device uses a multi-line laser light to measure the pulsation position with a finger, drives the 3-axis motor stage, and directs the laser light pointer to the center of the fingernail so that the pulse sensor is always in the same pulsation position. Make it work. "Pressure-way navigation and control" in step Mac pulse wave sensor is in contact so as to position the surface of the position and, gamyeo moving the sensor in X _{_{_2,}} Y _2, Z ₂ X _₂ -Y ₂ axis measures the slope change. The amount of rotation of the X ₁ -Y ₁ rotary motor is calculated and moved from the measured value. Repeat this process to estimate the optimized X ₂ -Y ₂ compression direction. Finally, in the pressure and maximum pulse wave search step, the radial artery is continuously pressurized using a pressure motor to measure the pulse until the maximum pulse wave is obtained.

When the present invention is performed according to the above method, the pulse can be quickly measured because it enters the stabilization stage faster than the conventional single gain result. In addition, the error caused when not pressed vertically to the radial artery was removed by adjusting the X and Y directions of the pulse sensor.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved. Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims

In the pulse measuring device,

A movement control unit for moving the position of the pulse measuring unit for measuring the pulse of the subject under a plurality of predefined axial directions;

A pulse sensor for measuring a pulse of the subject under a position determined by the movement controller;

An inclination sensor for measuring an inclination change corresponding to the position; And

A processor for determining position control by the movement control unit according to the rotation amount of the tilt sensor calculated based on the measured tilt change amount

Mac measuring device comprising a.
The method of claim 1,

The tilt sensor is,

Sensor for precision pulse measurement method for measuring the X-axis inclination change value and the Y-axis inclination change value based on Equation 1 below.

here,
Is the X-axis gradient change value,
Is the inclination change value of the Y axis, D (+ Xe) is the inclination change value when moving by + D distance to the Xe axis, and D (-Xe) is the inclination change value when moving by -D distance in the Xe axis, D (+ Ye) is a tilt change value when moving by + D distance on the Ye axis, and D (-Ye) is a tilt change value when moving by -D distance on the Ye axis.
The method of claim 1,

The controller,

Controller for precision pulse measuring method for calculating the rotation amount based on Equation 2 below

here,
Is the amount of rotation about the X axis,
Is the amount of rotation about the Y axis, and P (
) Is the gain for the X axis, and P (
) Is the gain on the Y axis, k total is the total number of iterations, and k sr may be the start of the stable range.
The method of claim 1,

Wherein the movement control unit using a multi-line laser light to find the pulsation position of the measurer comprising moving the pulse measuring device.
In the pulse measuring method,

Moving the vein measuring unit position for measuring the vein of the subject in a plurality of predefined axial directions;

Measuring the vein through a vein sensor for measuring the vein of the subject corresponding to the position determined by the moving step;

Measuring the change amount of the inclination through an inclination sensor which measures the change amount of the inclination corresponding to the position; And

Determining position control by the movement control unit according to the rotation amount of the inclination sensor calculated based on the measured inclination change amount;

Including Mac measurement method.
The method of claim 5,

The step of moving the position of the pulse measuring unit comprises measuring the pulse to the position of the nail of the first designated subject.
The method of claim 4, wherein

Mac measurement method of measuring the pulse by repeating the above steps in the order listed within the error range