JP5340644B2 - Abdominal circumference measuring device - Google Patents

Description

  The present invention relates to an abdominal circumference measuring apparatus that measures the circumference of an abdomen of a human body by calculation.

  The circumference (abdominal circumference) of the abdomen such as the waist is an index reflecting the degree of obesity such as the amount of visceral fat accumulated. For this reason, it attracts particular attention in the sense of preventing lifestyle-related diseases and maintaining health. In Japan, the Ministry of Health, Labor and Welfare has mandated “metabolic screening” since fiscal 2008, which has made it necessary to measure the waist circumference during a health checkup for people who have reached a certain age.

By the way, the measurement of the abdominal circumference is generally performed by a method in which the measurer places a measure around the stomach of the person to be measured. As a measuring apparatus used in this method, for example, Patent Document 1 describes a digital tape measure.
Japanese Patent Laid-Open No. 9-14995

  However, in a measuring device having a tape measure like a measure, it is troublesome and difficult to accurately place the measure on the circumference of the waist, so that the burden on the measurer is large. In addition, since the measurement position (the level and height of the tape) is often shifted, an error occurs in the measurement result depending on the measure of the measurer and the level of mastery. In addition, in the measurement using the measure, the measurement person has to touch the abdomen of the measurement person directly, so that the measurement person may feel it uncomfortable.

  Accordingly, an object of the present invention is to provide an abdominal circumference measuring apparatus that can easily and accurately measure the circumference of the abdomen and can reduce the burden on the measurer and the person being measured.

  In order to solve the above-described problems, the present invention measures a distance to an object to be measured, and includes a plurality of non-contact distance measuring sensors arranged on the same plane, The circumference of the abdomen of the person to be measured is calculated based on the frame on which the distance measurement sensor is arranged, the inclination angle detection means for detecting the inclination angle of the same plane, and the output values of the plurality of distance measurement sensors. An abdominal circumference measuring apparatus comprising: a computing unit; and a control unit that controls the computing unit so as to compute the circumference when the inclination angle detecting unit detects that the same plane is in a horizontal state. provide.

  Since the abdominal circumference measuring apparatus of the present invention has the inclination angle detecting means, the abdominal circumference is calculated only when the same plane on which the plurality of distance measuring sensors are arranged is horizontal with respect to the floor. It is possible to easily obtain the measured value of the peripheral diameter in the horizontal state. In addition, the measurer can measure the circumference of the abdomen only by placing the frame distance measurement sensor facing the person to be measured, so that the measure is placed around the person's abdomen. Will be relieved and the burden will be greatly reduced. In addition, it is possible to suppress variations in measurement values depending on the level of skill of the measurer, and to obtain more accurate measurement results. Furthermore, since a non-contact type distance measuring sensor is used, it is not necessary to bring the measurement device into contact with the person to be measured. Therefore, the burden on the person being measured is reduced.

  Preferably, a first point light projecting unit capable of indicating a specific position of the abdomen of the measurement subject by projecting point light may be further disposed inside the frame. Accordingly, the measurer can arrange the frame with respect to the measurement subject in accordance with the specific position of the measurement subject's abdomen, and thus the frame can be aligned based on the specific position.

In a preferred aspect of the present invention, the plurality of distance measurement sensors include first and second distance measurement sensors that are opposed to each other and have the same measurement axis, and the first point light projection unit is arranged on the same plane. Arranged on a straight line including the first distance measuring sensor, and the calculation of the calculation unit is performed when the point light projected by the first point light projection unit is at the umbilic position of the measurement subject. Based on the output value output from each of the plurality of distance measuring sensors, the circumference of the abdomen of the measurement subject is estimated. According to this aspect, the output value of the first distance measurement sensor at the umbilical position of the abdomen and the output value of the second distance measurement sensor located on the back side of the measurement subject and having the same measurement axis are reliably obtained. Therefore, a value obtained from these output values (for example, the vertical width of the abdomen) can be used as a parameter of the estimation formula used by the calculation unit. Therefore, it becomes possible to easily estimate the circumference of the abdomen based on the correlation between the circumference of the abdomen and the parameters.
The present invention also provides a plurality of non-contact distance measuring sensors, each of which measures the distance to the measurement point on the abdomen of the measurement subject and is arranged on the same plane, The circumference of the abdomen of the measurement subject is determined based on the output value of each of the plurality of distance measurement sensors, the frame provided with the distance measurement sensor, the inclination angle detection means for detecting the inclination angle of the same plane, Arranged inside the frame, a calculation unit for calculating, a control unit for controlling the calculation unit to calculate the peripheral diameter when the inclination angle detection means detects that the same plane is in a horizontal state And a first point light projecting means capable of indicating a specific position of the abdomen of the measurement subject by projecting point light, wherein the plurality of distance measurement sensors are opposed to each other and the measurement axes coincide with each other. 1 and 2 Positioned 90 degrees away from each of the first and second distance measuring sensors on the circumference of a circle whose diameter is a straight line connecting the distance measuring sensor and the first and second distance measuring sensors. A third distance measuring sensor that intersects at the center point of the circle, and the first point light projection means is perpendicular to the same plane. Are arranged on a straight line including the first distance measuring sensor, and the calculation unit calculates the plurality of points when the point light projected by the first point light projection unit is at the umbilic position of the measurement subject. Based on the output value output from each of the distance measuring sensors, the circumference diameter of the abdomen of the person to be measured is estimated, and in the estimation, the calculation unit calculates the vertical width value of the abdomen and the horizontal width of the abdomen. Using an arithmetic expression whose value is a variable, The vertical width value of the abdomen of the subject is calculated from the output values of the first and second distance measurement sensors, and the horizontal width value of the abdomen is calculated from the output values of the third distance measurement sensor. An abdominal circumference measuring device is provided.

In any of the above-described aspects, in addition to the first point light projection unit, a second point light projection unit that projects point light on the inner side of the frame and on the same plane as the first point light projection unit is provided. Preferably they are arranged. By having the second point light projecting unit arranged on the same plane as the first point light projecting unit, the measurer becomes almost horizontal with a line passing through the two point lights projected on the abdomen of the subject. In this way, the inclination of the frame can be adjusted to bring the frame closer to a horizontal state. That is, it assists the horizontal alignment of the frame.
In this case, preferably, the second point light projection means may be arranged on a straight line perpendicular to the same plane and including the third distance measurement sensor. Alternatively, the second point light projection means may be arranged on a straight line that is perpendicular to the same plane and includes the second distance measuring sensor.

  Preferably, a part of the frame is open. Since the conventional measure is wound around the entire circumference of the trunk, it takes time for the measurer to wind the measure around the subject. On the other hand, according to this aspect, the measurer can accommodate the measured person inside the frame simply by inserting the body of the measured person from the open part of the frame. The measuring device can be easily and quickly arranged with respect to the measurement subject.

  In the embodiment of the present invention, a plurality of non-contact type distance measuring sensors are arranged inside an arc-shaped frame, and an abdominal girth (abdominal part) that calculates the peripheral diameter of the abdomen based on the output value of each distance measuring sensor Perimeter measuring device). The abdominal circumference meter acquires output values from each distance measurement sensor in a state where the person to be measured is inside the frame, and estimates the abdominal circumference by calculation based on these output values. This embodiment demonstrates the case where a measurement person performs the measurement by the said waist girth with respect to the to-be-measured person.

Hereinafter, with reference to FIGS. 1-5, the abdominal girth meter 100 which concerns on 1st Embodiment is demonstrated. FIG. 1 is a perspective view showing an appearance of the abdominal girth meter 100, and FIG. 2 is a plan view of the abdominal girth meter 100. FIG. 3 shows the electrical configuration of the abdominal girth meter 100.
As shown in FIGS. 1 to 3, the waist circumference meter 100 includes an arc-shaped frame 1, four distance measurement sensors 3 (31 to 34) disposed on the inner side surface of the frame 1, and the inner side surface of the frame 1. , The point light projection unit (first point light projection unit) 91 disposed above the distance measurement sensor 31 and the point light projection unit (second point light projection unit) 92 disposed above the distance measurement sensor 34. With. The frame 1 has a shape in which a part of a cylindrical edge-shaped frame is opened. Since this is a frame in which a part is opened and the person to be measured is placed inside, the person to be measured can easily enter the inside of the frame 1 or easily place the frame 1 outside the person to be measured. Can be measured easily and quickly.

  The plurality of distance measurement sensors 31 to 34 are arranged on the same plane (hereinafter referred to as “plane A”). As can be understood from FIG. 1B and FIG. 2, the point light projection unit 92 is arranged on a straight line s1 that is perpendicular to the plane A and includes the distance measurement sensor 34. Similarly, the point light projection unit 91 is arranged on a straight line (not shown) perpendicular to the plane A and including the distance measurement sensor 31. The point light projectors 91 and 92 are arranged on another same plane (plane B) different from the plane A. The point light projection unit 91 is, for example, a laser pointer, and can instruct a specific position of the abdomen of the measurement subject by projecting the point light by irradiating a bundle of laser beams. In this embodiment, the measurer uses the point light projection unit 91 to indicate the measurement subject's umbilicus as the measurement vertical position (measurement height position) of the frame 1, and each point light projection unit 91 and 92 has each point. The inclination of the frame 1 when the straight line connecting the light is approximately horizontal (the inclination of the plane A) is defined as a temporary measurement horizontal position (measurement position when the frame 1 is in the horizontal state). As described above, the point light projection unit 91 allows the measurer to always measure the abdominal circumference on the basis of the measurement subject's umbilical position. Further, the plane light A can be brought close to the horizontal state by the point light projection units 91 and 92. In the following description, setting the frame 1 in a horizontal state and setting the plane A in a horizontal state will be described as synonymous.

  A console 2 is attached to the outside of the frame 1. The console 2 includes a display unit 5 for displaying operation guidance to the measurement subject and notification of measurement results, a start button 61 as the operation unit 6 operated by the measurement subject, a power key 7, and an audio output unit. 14 is provided. Further, a position determination button 62 is provided on the upper surface of the frame 1 as the operation unit 6. In the present embodiment, at the time of measurement, the measurer grips the left and right sides of the frame 1 with both hands, and places the subject inside the frame 1 so that the console 2 is positioned in front of the subject's abdomen. . Then, the point light projection units 91 and 92 adjust the frame 1 to the measurement vertical position and the provisional measurement estimation position, and press the position determination button 62 while maintaining the position. Therefore, the position determination button 62 is disposed at a position where it can be pushed down with any finger of the right hand when the measurer holds the frame 1. The position where the console 2 is attached and the position of the position determination button 62 are arbitrary, and are not limited to the illustrated mode. For example, the console 2 may be arranged on the upper part of the frame 1 with the installation surface of the display unit 5 and the operation unit 6 as the upper surface. As a result, the display unit 5 and the operation unit 6 are in a position where they can be seen from the measurement subject, and the abdominal girth meter 100 can be used even when the measurement subject performs the measurement himself.

Each distance measurement sensor 3 includes a light emitting element that emits light such as infrared rays, and a light receiving element that receives reflected light from a measurement point on the person to be measured and converts it into an electrical signal. The light receiving element outputs an analog electric signal corresponding to the distance between the sensor and the point to be measured by an optical distance measuring method. This electric signal is supplied to the CPU 10 via the switch 41 and the analog / digital (A / D) converter 42. The light receiving element of each distance measuring sensor 3 receives reflected light from the point where the distance measuring axis of the sensor and the object intersect. That point is a measurement point measured by the sensor, and each distance measurement sensor 3 emits an electrical signal corresponding to the distance between the sensor and the measurement point. As shown in FIG. 2, in this embodiment, each measurement axis z <b> 1 to z <b> 4 of each distance measurement sensor 3 passes through the center P of the arc. Each measurement axis z1 to z4 is in the plane A. Each sensor 3 is arranged so that a straight line connecting the distance measurement sensors 31 and 32 and a straight line connecting the distance measurement sensors 33 and 34 are orthogonal to each other.
FIG. 4 shows a state in which the frame 1 is set on the measurement subject. Specifically, the distance measurement sensor 31 generates an electrical signal corresponding to the distance Lc between the sensor and the measurement point on the measurement subject. Similarly, the distance measurement sensor 32 emits an electric signal corresponding to the distance La, the distance measurement sensor 33 emits an electric signal corresponding to the distance Lb, and the distance measurement sensor 34 emits an electric signal corresponding to the distance Ld.

  The console 2 further includes a switch 41, an A / D converter 42, an inclination angle detection unit (inclination angle detection means) 8 for detecting an inclination angle (roll angle, pitch angle) of the plane A, a CPU, as shown in FIG. A storage unit 13 including a (central processing unit) 10, a ROM (Read Only Memory) 131, and a RAM (Random Access Memory) 132 is incorporated. The switch 41 supplies the output signals of the distance measuring sensors 3 to the A / D converter 42 one after another, and the A / D converter 42 converts the supplied signal into a digital signal. A digital signal from the A / D converter 42 is supplied to the CPU 10. Accordingly, digital distance signals based on the output signals of the distance measurement sensors 3 are successively supplied to the CPU 10. The RAM 132 is a volatile memory, for example, and is used as a work area for the CPU 10. The CPU 10 stores these distance signals in the RAM 132.

  The CPU 10 includes a control unit 11 and a calculation unit 12. The control unit 11 operates according to a computer program or program element stored in the ROM 131 and controls the point light projection units 91 and 92, the display unit 5, and the audio output unit 14. In addition, the control unit 11 performs an operation according to the signal from the operation unit 6 described above.

  The computing unit 12 functions as computing means for computing the circumference of the abdomen of the person to be measured based on the distance signal (corresponding to the output value of each distance measuring sensor 3) once stored in the RAM 132. The ROM 131 stores an arithmetic expression for calculating the circumference of the abdomen based on the distance data. In the present embodiment, the vertical width of the abdomen passing through the navel (abdominal width in the direction perpendicular to the lateral direction of the abdomen) is obtained based on the distances La and Lc, and the lateral width of the abdomen is obtained based on the distances Lb and Ld. Then, the abdominal circumference is obtained by substituting the vertical and horizontal values of the abdomen into the correlation equation. This correlation equation is found from multiple regression analysis based on actual data of the abdominal length and width and the abdominal circumference.

The inclination angle detection unit 8 is, for example, a triaxial acceleration sensor. The acceleration sensor can detect the gravitational acceleration of each X-axis, Y-axis, and Z-axis applied to the stationary object, and thereby obtain the inclination angle of each axis based on each detected value of the gravitational acceleration. Is possible. With reference to FIG. 5, the principle by which the inclination angle of each axis can be detected by the acceleration sensor will be described. First, as a premise, the gravity G (1 g: 9.8 m / s ² ) of the earth acts on the object G vertically downward of the object G. Therefore, when the object G is in a horizontal state (θ = 0), g · sin θ = 0 g and g · cos θ = 1 g, and when the object G is in a vertical state (θ = 90), g · sin θ = 1 g and g · cos θ = 0 g. Therefore, as shown in FIG. 5, when the object G tilts (θ ≠ 0), the force (1g) applied to the object G is divided into decomposition components g · sin θ and g · cos θ according to the tilt. This decomposition component g · sin θ is the gravitational acceleration applied in the direction in which the acceleration sensor is attached. Therefore, when the acceleration sensor is used, the inclination angle detection unit 8 is attached in the direction of X-axis output value Ax of 0 g, Y-axis direction output value Ay of 0 g, and Z-axis direction output value Az of 1 g. Is attached to the same plane as or parallel to the plane A.
The output values Ax, Ay and Az of the tilt angle detection unit 8 are output as analog values and supplied to the CPU 10 via the A / D converter 42. The computing unit 12 calculates the tilt angle using a trigonometric function.

  By the way, as described above, the measurer determines the horizontal position of the frame 1 as the temporary measurement horizontal position by the point light projection units 91 and 92 and presses the positioning button 62 down. However, since the measurer only visually determines whether or not the virtual straight line connecting the point lights of the point light projection units 91 and 92 is approximately horizontal, the accuracy of the horizontal alignment is determined by the senser's sense and It depends on the skill level. For this reason, in this embodiment, an accurate inclination angle is measured by providing the above-described inclination angle detector 8. Then, after the positioning button 62 is pushed down by the measurer, the output value from each distance measurement sensor 3 when the measured inclination angle is within a predetermined allowable error range is used as a base for calculating the peripheral diameter (described later). Steps S4 to S8 in FIG. Therefore, the abdominal circumference meter 100 can output the circumference of the abdomen at the true (or near) measurement horizontal position, compared with the case of measuring the abdomen circumference by manually adjusting the horizontal position. As a result, the accuracy of measurement is greatly improved.

  The Z-axis output value Az detects that the acceleration sensor is upside down when the value becomes negative. Therefore, in this embodiment, it is not always necessary to use a triaxial acceleration sensor. Instead, a biaxial acceleration sensor that can acquire the tilt angles of the X axis and the Y axis may be used. Further, the tilt angles of the X axis and the Y axis may be acquired using two uniaxial acceleration sensors. Further, an angular velocity sensor capable of measuring the rotational speed of an object such as a gyro sensor may be used to integrate the rotational speed detected with reference to the reference posture (horizontal state) to obtain an absolute value. One or a plurality of other types of tilt sensors may be used, or an arbitrary number of acceleration sensors, angular velocity sensors, and tilt sensors may be used in combination.

  FIG. 6 is a flowchart showing the flow of the measurement process of the abdominal circumference by the abdominal girth meter 100. The ROM 131 stores a computer program or program element corresponding to this flowchart, and the CPU 10 operates in accordance with this computer program or program element. In this embodiment, the ROM 131 is used as a medium storing a computer program or program element, but the hard disk, compact disk, digital versatile disk, flexible disk, or other suitable storage medium stores the computer program or program element. May be used for

  The operation shown in FIG. 6 starts when the power key 7 in FIG. 1 is pressed. First, the control part 11 of CPU10 drives the display part 5 by step S1, and starts the display. Then, the CPU 10 causes the display unit 5 to display a message “Please set the waist circumference meter to the person to be measured”. With this guidance, the measurer inserts the subject under standing from the open portion of the frame 1 into the frame 1 and places the subject under the frame 1.

  Next, in step S2, the control unit 11 determines whether or not the start button 61 for instructing measurement start has been pressed. The control unit 11 repeats the determination until the determination result of the determination is affirmed. Subsequently, in step S3, the CPU 10 drives the point light projecting units 91 and 92 to emit light, and projects the point light onto the abdomen surface of the measurement subject. Then, on the display section 5, “Move the front pointer to the measurement subject's navel. Position the right pointer so that it is horizontal to the front pointer. If it is OK, press the positioning button.” Message is displayed. Thereby, the measurer adjusts the measurement vertical position by matching the point light of the point light projection unit 91 with the umbilic position of the measurement subject, and the point light and the point light projection unit 91 irradiated from the point light projection unit 92. After adjusting the temporary measurement horizontal position by adjusting the height of the point light irradiated from the position, the position determination button 62 is prompted to be pressed down.

  In step S4, the control unit 11 determines whether or not the position determination button 62 has been pressed, and repeats the determination in step S4 until the determination result is affirmed. Subsequently, in step S5, the control unit 11 drives each sensor 3 by giving a drive command signal to each distance measurement sensor 3, and when a digital distance signal from the A / D converter 42 is input. The RAM 132 temporarily stores the distance data indicated by these distance signals.

  Next, in step S6, the control unit 11 outputs a gravitational acceleration Ax, Ay, Az of each axis by giving a drive command signal to the tilt angle detection unit 8, and further outputs a digital acceleration from the A / D converter 42. When the gravitational acceleration signals are input, the RAM 132 temporarily stores the gravitational acceleration data indicated by these gravitational acceleration signals. Subsequently, the control unit 11 controls the calculation unit 12 so as to calculate the inclination angle of each axis based on the gravitational accelerations Ax, Ay, and Az.

  Subsequently, in step S7, the CPU 10 determines whether or not the calculated tilt angle is within an allowable error range. For example, the CPU 10 determines YES if the inclination angle of each X-axis and Y-axis is within a predetermined range (for example, within a range of ± 1.5 degrees), otherwise determines NO, and step S5 again. And the process of S6 is repeated. The allowable error range of the tilt angle is the range of tilt angles where the error given to the estimated value of the abdominal circumference due to the non-horizontal angle is within the range of errors allowed in the measurement of the abdominal circumference. is there.

When the determination in step S7 is affirmed, in step S8, the control unit 11 causes the calculation unit 12 to function as a calculation unit that calculates the value of the abdominal circumference based on the distance data temporarily stored in the RAM 132. . In this embodiment, first, the calculation unit 12 calculates the values of the vertical width X1 and the horizontal width X2 of the abdomen according to the following equations.
X1 = L1- (La + Lc) Formula (A)
X2 = L2- (Lb + Ld) Formula (B)
Here, L1 is the distance between the sensor 31 and sensor 32, and L2 is the distance between the sensor 33 and sensor 34 (FIG. 4), each of which is a known value.
Subsequently, the calculation unit 12 reads an arithmetic expression for calculating the abdominal circumference diameter from the ROM 131. This equation is found from multiple regression analysis,
Y = k1 + k2 · X1 + k3 · X2 (1)
It is expressed by the following estimation formula. Where Y is the abdominal circumference, X1 is the abdominal length, X2 is the abdominal width,
Y = X2, k1 to k3 are constants, and are values determined as appropriate by multiple regression analysis. The calculation unit 12 substitutes the vertical width X1 and the horizontal width X2 of the abdomen into the formula (1) to obtain the abdominal circumference.

  Subsequently, in step S9, the CPU 10 displays the calculation result of the abdominal circumference on the display unit 5 and outputs a short electronic sound from the audio output unit 14 to measure that the measurement of the abdominal circumference is completed. Inform the person. CPU10 complete | finishes a measurement process, after maintaining the display of the calculation result of abdominal circumference diameter for a while. When the beep sounds, the measurer reads the abdominal circumference value and records it as necessary.

  As described above, according to the present embodiment, since the abdominal circumference is measured based on the measurement value acquired using the non-contact type distance measuring sensor, the circumference of the abdomen is measured with a measure or the like. In comparison, it becomes possible to more easily measure the circumference of the abdomen. Further, the output value of each distance measurement sensor when the inclination angle of the plane (plane A) on which the plurality of distance measurement sensors are arranged is actually measured by a sensor such as an acceleration sensor and the measured inclination angle is within an allowable range. Since the abdominal circumference is calculated using, the abdominal circumference can be estimated with high accuracy. In addition, since the measurer does not need to place the measure around the abdomen of the subject, the burden on the measurer is reduced and the subject is uncomfortable that the measurer directly touches the abdomen. The condition does not have to be accepted, and the mental burden on the subject is reduced.

  In the present embodiment, the output values (distances Lb and Ld) of the distance measuring sensors 33 and 34 are substituted into the equation (B) to obtain the abdominal width X2, and are substituted into the equation (1). However, depending on the arrangement of the frame 1, the distance measurement sensors 33 and 34 may not always be able to measure the distance to the most protruding portion of the abdomen. Therefore, in a state where the point light of the point light projection unit 91 is projected onto the measurement subject's umbilicus, the frame 1 is moved horizontally toward the measurement subject or horizontally moved away from the measurement subject. By prompting the measurer, a plurality of sets of distances Lb and Ld may be measured, and candidate values for a plurality of abdominal widths X2 may be obtained. Then, among the plurality of candidate values of the abdominal width X2, the one having the maximum value may be substituted into the expression (1) as the abdominal width X2. Thereby, it becomes possible to estimate the circumference of the abdomen more accurately.

<Modification 1>
In the embodiment described above, the circumference of the abdomen is estimated by the equations (A), (B), and (1). However, the present invention is not limited to this, and the output value of each distance measurement sensor 3 is Based on the coordinates, the coordinates on the periphery of the abdomen may be acquired, and curve interpolation processing may be executed based on the coordinates. Then, the circumference of the abdomen is obtained from the outer shape of the abdomen obtained by this curve interpolation process. In this case, the ROM 131 stores in advance the start point coordinates (the coordinates of the start point of the measurement axis) of each distance measurement sensor 3 and the direction of the measurement axis. The calculating part 12 should just acquire the coordinate on the circumference | surroundings of an abdominal part based on the data of distance, the coordinate of each distance measurement sensor 3, and the measurement axis direction.
The number of distance measurement sensors 3 is not limited to the embodiment, and a large number of distance measurement sensors 3 may be arranged within a range in which the calculation process of the structure of the frame 1 and the abdominal circumference diameter is not too complicated. . By disposing a large number of distance measuring sensors 3, it becomes possible to obtain the measurement result of the peripheral diameter of the abdomen with higher accuracy.

In FIG. 7, the top view of the waist circumference meter 200 which concerns on one aspect | mode of this modification is shown. In FIG. 7, the same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 7, the waist meter 200 is different from the waist meter 100 of the above-described embodiment in that it includes eight distance measurement sensors 301 to 308 disposed inside the arc-shaped frame 1. When each of the distance measurement sensors 301 to 308 receives a drive command signal from the control unit 11, each start point coordinate a1 to a8 and a point where each measurement axis intersects with the circumference of the abdomen of the measurement subject (measurement points b1 to b8). An electrical signal corresponding to the distance to is output. The ROM 131 stores the start point coordinates a1 to a8 of the distance measurement sensors 301 to 308 and data indicating the directions of the measurement axes. The calculation unit 12 stores the distance data and the start point coordinates a1 to a8. Then, based on the measurement axis direction, the coordinates on the periphery of the abdomen are acquired, and curve interpolation processing is executed.

  In the above-described embodiment, the abdomen vertical width X1 is used to calculate the abdominal circumference diameter, and thus the distance measurement sensor 31 is provided on the same vertical line as the point light projection unit 91. However, when measuring the circumference of the abdomen at the height of the umbilicus, it is desirable that the point light projection unit 91 and each distance measurement sensor are in the same plane. In this modification, since the abdominal circumference is estimated by curve interpolation, there is no need to place a distance measurement sensor on the midline of the human body passing through the navel. Therefore, the point light projection unit 91 and the distance measurement sensors 301 to 308 can be arranged in the same plane.

<Modification 2>
In the above-described embodiment, the case where the frame 1 has an arc shape has been described. However, the present invention is not limited to this and may be a part of the circumference of an ellipse. Therefore, it may be a curved shape. Further, the shape is not limited to a curved shape, and may be a shape in which one piece of a square frame is opened.
FIG. 8 is a plan view showing an abdominal girth meter 300 according to one aspect of this modification. In FIG. 8, the same parts as those in the above embodiment are given the same reference numerals, and the description thereof is omitted.
As shown in FIG. 8, the frame 1 </ b> A has a substantially semicircular arc shape, and distance measuring sensors 31, 32, and 33 are arranged at intervals of 90 degrees on the inside thereof. Similar to the above embodiment, the point light projection unit 91 for indicating the umbilicus position is located on the same vertical line as the distance measurement sensor 31. On the other hand, instead of the point light projection unit 92, a point light projection unit 93 is arranged on the same vertical line as the distance measurement sensor 33. Similar to the point light projection unit 92, the point light projection unit 93 is used as a measure for the measurer when adjusting the frame 1A so that the straight line connecting to the point light projection unit 91 is in a horizontal state.

Assuming that the shape of the human body is bilaterally symmetric, at least three points in total, including two points on the front and back of the abdomen (umbilical position and spine position) on the midline of the human body and one point on either side of the left and right sides Then, the circumference of the abdomen can be estimated. Therefore, in the abdominal girth meter 300, each of the distance measurement sensors 31, 32, and 33 is disposed at locations corresponding to the front and rear of the measurement subject's abdomen and the left flank. In this case, when the abdominal circumference diameter is calculated by the calculation unit 12, based on the distance data measured by the distance measurement sensor 33, the measurement of the left flank is performed across the straight line connecting the distance measurement sensors 31 and 32. The position of one point on the outer shape of the abdomen of the right flank that is symmetrical to the point is estimated. And the circumference of an abdomen is estimated based on Formula (A) of the said embodiment, (B), and Formula (1). Alternatively, a curve interpolation process is executed based on the four coordinates, and the circumference of the abdomen is estimated from the abdomen outer shape obtained by the interpolation process.
In the above-described embodiment and the modification example, the aspect in which the peripheral diameter of the abdomen is estimated based on both the vertical width and the horizontal width of the abdomen is described. However, the abdomen is determined based on either the vertical width or the horizontal width of the abdomen. You may estimate the circumference of. In this case, at least two distance measurement sensors may be arranged in the front and rear of the abdomen of the subject or at least two in the left and right flank direction of the subject's abdomen.

<Other variations>
In the embodiment and the modification described above, the measurer visually confirms whether the straight line connecting the point light projection units 91 and 92 or the straight line connecting the point light projection units 91 and 93 is horizontal. The enter button 62 was pressed. However, even if the measurer believes that the person is in the horizontal state and presses the position determination button 62, if the degree of inclination from the actual horizontal state is large, the processes in steps S5 to S7 in FIG. 6 are only repeated. The measurement result of the circumference of the abdomen cannot be obtained. For this reason, the angle acquired based on the output of the tilt angle detection unit 8 may be displayed as a numerical value on the display unit 5 so that the measurer can adjust the angle of the frame 1 based on the numerical value. Further, guidance such as “please tilt to the right” or “tilt forward” may be displayed on the display unit 5 to guide the angle adjustment by the measurer. Or the guide line which shows a horizontal position may be displayed on the display part 5, the image of the flame | frame interlock | cooperated with the motion of the flame | frame 1 may be displayed, and adjustment of an angle by a measurer may be assisted.

Further, in the above-described embodiment and modification, the point light projection units 91 to 93 are arranged in the front surface of the abdomen and the flank direction. However, another point light projection unit may be arranged on the back side of the measurement subject (for example, the position where the distance measurement sensors 32 and 301 are arranged). Thereby, it becomes possible to measure the longitudinal width X1 of the abdomen more accurately.
In addition, in the above-described embodiment, the aspect in which the measurement result of the abdominal circumference diameter is displayed on the display unit 5 has been described. It may be stored, output to an external device, or stored in the ROM 131 and output to the external device.
In the above-described embodiment and each modification, the tilt angle of the frames 1 and 1A is acquired based on the output value of the tilt angle detection unit 8, and only when the frame 1 is horizontal, based on the output value of each distance measurement sensor. The aspect in which the peripheral diameter of the abdomen is calculated has been described. However, first, the circumference of the abdomen may be calculated based on the output value of each distance measurement sensor, and then the tilt determination based on the output value of the tilt angle detector 8 may be performed. That is, the abdominal circumference measured when the frames 1 and 1A are in a horizontal state may be output to the outside as a final measurement result.

(A) And (B) is a perspective view which shows the external appearance of the abdominal circumference meter 100 which concerns on embodiment of this invention. It is a top view of the abdominal circumference meter 100. 3 is a block diagram showing an electrical configuration of the abdominal circumference meter 100. FIG. It is a figure which shows a mode that the flame | frame 1 was set to the to-be-measured person. It is a figure for demonstrating the principle of an acceleration sensor. 4 is a flowchart showing a flow of measurement processing of an abdominal circumference by the abdominal girth 100. It is a top view of the waist girth meter 200 concerning one mode of this modification. It is a top view of the waist girth meter 300 concerning one mode of this modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A ... Frame, 2 ... Console, 3, 31-34, 301-308 ... Distance measurement sensor, 5 ... Display part, 6 ... Operation part, 7 ... Power key, 8 ... Inclination angle detection part, 10 ... CPU, DESCRIPTION OF SYMBOLS 11 ... Control part, 12 ... Operation part, 13 ... Memory | storage part, 14 ... Audio | voice output part, 41 ... Switch, 42 ... A / D converter, 61 ... Start button, 62 ... Position determination button, 91-93 ... Point light Projector, 100, 200, 300 ... waist circumference, 131 ... ROM, 132 ... RAM.

Claims (5)

A plurality of non-contact distance measuring sensors, each measuring a distance to a measurement point on the abdomen of the measurement person, and arranged on the same plane;
A frame in which the plurality of distance measuring sensors are arranged inside,
An inclination angle detecting means for detecting an inclination angle of the same plane;
Based on the output value of each of the plurality of distance measurement sensors, a calculation unit that calculates the circumference of the abdomen of the measured person;
When the inclination angle detection means detects that the same plane is in a horizontal state, a control unit that controls the calculation unit to calculate the peripheral diameter;
A first point light projection means arranged inside the frame and capable of indicating a specific position of the abdomen of the subject by projecting point light;
With
The plurality of distance measurement sensors is a circle having a diameter that is a straight line connecting the first and second distance measurement sensors facing each other and having the same measurement axis, and the first and second distance measurement sensors. And a third distance measuring sensor positioned 90 degrees away from each of the first and second distance measuring sensors, wherein each measuring axis of the first to third distance measuring sensors is the circle. Intersect at the center point of
The first point light projection means is disposed on a straight line that is perpendicular to the same plane and includes the first distance measurement sensor,
The calculation of the calculation unit is based on an output value output from each of the plurality of distance measurement sensors when the point light projected by the first point light projection unit is at the measurement subject's umbilical position. Estimate the circumference of the subject's abdomen,
In the estimation, the arithmetic unit uses an arithmetic expression having the abdomen vertical width value and the abdomen horizontal width value as variables, and outputs the measured values from output values of the first and second distance measurement sensors. Calculating the vertical width value of the abdomen of the person, and calculating the horizontal width value of the abdomen from the output value of the third distance measuring sensor,
Abdominal circumference measuring device. Second point light projection means for projecting point light is disposed inside the frame and on the same plane as the first point light projection means.
The abdominal circumference measuring apparatus according to claim 1. The second point light projection means is arranged on a straight line that is perpendicular to the same plane and includes the third distance measuring sensor.
The abdominal circumference measuring apparatus according to claim 2. The second point light projection means is arranged on a straight line that is perpendicular to the same plane and includes the second distance measuring sensor.
The abdominal circumference measuring apparatus according to claim 2. The frame is partially open.
The abdominal circumference measuring device according to any one of claims 1 to 4.

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