CN108309301B - Human body segment quality measuring method - Google Patents

Human body segment quality measuring method Download PDF

Info

Publication number
CN108309301B
CN108309301B CN201810130234.6A CN201810130234A CN108309301B CN 108309301 B CN108309301 B CN 108309301B CN 201810130234 A CN201810130234 A CN 201810130234A CN 108309301 B CN108309301 B CN 108309301B
Authority
CN
China
Prior art keywords
measured
mass
body segment
human body
posture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810130234.6A
Other languages
Chinese (zh)
Other versions
CN108309301A (en
Inventor
王勇
张素才
卢涛
陈恩伟
刘正士
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei University of Technology
Original Assignee
Hefei University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei University of Technology filed Critical Hefei University of Technology
Priority to CN201810130234.6A priority Critical patent/CN108309301B/en
Publication of CN108309301A publication Critical patent/CN108309301A/en
Application granted granted Critical
Publication of CN108309301B publication Critical patent/CN108309301B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1072—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring distances on the body, e.g. measuring length, height or thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1075—Measuring physical dimensions, e.g. size of the entire body or parts thereof for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1118—Determining activity level
    • 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
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Physiology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The invention discloses a method for measuring the quality of a human body segment, which comprises the following steps: collecting the length from the mass center of each measured human body segment of the measured person to the rotary joint; the method comprises the steps that a posture detection device is worn on each body segment to be detected of a person to be detected, and a force measuring platform is provided, wherein the posture detection device is used for obtaining the change of an included angle between the body segment to be detected and a vertical shaft, and the force measuring platform is used for obtaining the total mass and the total mass center coordinate of the person to be detected; and step three, acquiring the mass center coordinate change and the total mass center coordinate of the measured body section before and after the posture change according to the mode that the posture of the unmeasured body section is kept unchanged and the posture of the measured body section is changed, and then calculating the mass of the measured body section according to the mass center theorem. The invention adopts the mode of standing on the force measuring platform, and can obtain the mass of each measured human body segment according to the way that the posture of the unmeasured human body segment is kept unchanged, the posture of the measured human body segment is changed and the set measuring sequence.

Description

Human body segment quality measuring method
Technical Field
The invention relates to a method for measuring the body segment quality of a human body.
Background
The human body inertia parameters comprise: the mass, the position of the mass center and the rotary inertia of the whole body and each body section of the human body are basic parameters for carrying out human body movement and movement injury and prevention research, and are also important components of ergonomics, anthropology and human body science research. The quality of each body segment of the human body is particularly important, and a practical method and a practical device for measuring the quality of each body segment of the human body are lacked in the market.
The measurement of the quality of each body section of a human body has wide application field, is suitable for the design of safety protection equipment (such as industrial railings, civil balcony guardrails, safety belts and the like), the development of a dummy and an artificial limb of a disabled person, and is also suitable for the aspects of body shape modeling, weight-reducing quality change, medical diagnosis and the like.
The human body is divided into a plurality of sections according to the bony signs, each section is called a human body section (human-body segment), the human body sections are divided into 15 parts of head and neck, upper trunk, lower trunk, left upper arm, right upper arm, left forearm, right forearm, left hand, right hand, left thigh, right thigh, left calf, right calf, left foot and right foot by obvious bony sign position demarcation points.
Chinese patent document CN1682649A discloses a method and apparatus for measuring the weight of a human body link, which requires the person to be measured to adopt a prone position for auxiliary measurement, and both the measuring apparatus and the measuring method are complicated.
Other body segment measurement methods: the method for measuring the body segment quality of the human body based on the CT nuclear magnetic resonance has the advantages of harm to the human body in the measuring process, high cost and poor universality. The body segment measuring method based on the kinematic equation has the disadvantages of high data sampling difficulty, high measurement operability and requirement of professional experience.
Disclosure of Invention
The invention aims to provide a method for measuring a human body segment, which aims to solve the problems of inconvenience in prone position measurement and radiation damage measurement on a human body.
Therefore, the invention provides a method for measuring the body segment quality, which comprises the following steps: the method comprises the following steps of firstly, obtaining the length from the mass center of each measured human body segment of a measured person to a rotary joint, namely the length from the mass center of each measured human body segment to the rotary joint, namely the length from the measured human body segment to the connecting joint of an unmeasured human body; step two, wearing a detection device on each body segment to be detected of a person to be detected and providing a force measuring platform, wherein the detection device is used for acquiring the change of an included angle between the body segment to be detected and a vertical shaft, and further calculating the coordinate change of a mass center, and the force measuring platform is used for acquiring the total mass and the total mass center horizontal plane coordinate of the person to be detected; acquiring the included angle between the body segment to be detected and a vertical axis corresponding to the body segment to be detected before and after the posture of the body segment to be detected is changed according to the mode that the posture of the body segment not to be detected is kept unchanged and the posture of the body segment to be detected is changed, calculating the coordinate change of the mass center and the total mass center coordinate, then calculating the mass of the body segment to be detected according to the mass center theorem, wherein the mass of the forearm and the upper arm is obtained according to the measurement sequence of the hand, the forearm and the upper arm, the mass of the calf and the thigh is obtained according to the measurement sequence of the foot, the calf and the thigh, the head and the.
According to the body segment mass measuring method, the mass of each (measured) body segment can be obtained by adopting a mode of standing on a force measuring platform according to a mode of keeping the posture of an unmeasured body segment unchanged and changing the posture of the measured body segment and according to a set measuring sequence, and the measuring method is used for measuring in a standing posture state. The method is simple, convenient and practical. And has no harm to human body and low cost.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
figure 1 shows a simplified diagram of a human body structure to which the method of mass measurement of a body segment according to the invention is applicable;
FIG. 2 shows a measurement schematic of a body segment mass measurement method according to the present invention, wherein the measured body segment is in a first position;
FIG. 3 shows a measurement schematic of a body segment mass measurement method according to the present invention, wherein the measured body segment is in a second position;
figure 4 shows a flow chart of a method of mass measurement of a body segment according to the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A simplified diagram of a human body structure to which the present invention is applicable is shown in fig. 1, and includes 14 parts of a head and neck 7, a trunk 8, a left upper arm 9, a right upper arm 10, a left forearm 11, a right forearm 12, a left hand 13, a right hand 14, a left thigh 15, a right thigh 16, a left calf 17, a right calf 18, a left foot 19, and a right foot 20. Compared with the body segment specified by the national standard, the upper torso and the lower torso are taken as a whole and are not distinguished, namely only the mass of the torso is measured.
As shown in fig. 4, a method for measuring the mass of a body segment according to an embodiment of the present invention comprises the steps of:
s10, firstly, the length L of the centroid position of each measured human body segment from the rotary joint (the connecting joint of the measured human body segment and the unmeasured human body) is obtained.
In the step, the body size parameters obtained by scanning the whole body of the standing person to be measured can be used for quickly obtaining the mass center position of each measured body segment and the length from the mass center position to the rotary joint (the measured body segment and the joint connecting the undetected body) according to empirical data or a human body mathematical model.
S20, wearing a human body posture detection device on the untested body section, wearing a tested body section posture detection device on the tested body section, providing a force measurement platform, and obtaining the coordinates of the total centroid horizontal plane in real time.
S30, the person to be measured stands on the force measuring platform 2 to measure in the following way, and the reference is combined to the following figures 2 and 3:
in the measuring method of the embodiment, the body segment to be measured changes the posture in a special plane of the human body, namely a sagittal plane or a coronal plane, so as to simplify the functional requirements on the detection device.
A) When the human body is initially standing, the coronal plane of the human body is parallel to the coordinate axis X or Y of the force measuring platform, preferably the X axis, the included angle between the segment to be measured and the vertical axis is gamma 1, and the mass of the segment to be measured is set as M1The coordinate of the horizontal plane of the centroid is (X)1，Y1) (ii) a Mass of unmeasured section M3The coordinate of the horizontal plane of the centroid is (X)3，Y3) (ii) a Total mass of human body is M2The coordinate of the total centroid horizontal plane is (X)2，Y2). Wherein the total mass M of the human body2Position of the general center of mass of the human body (X)2，Y2) And can be measured by a force measuring platform.
Chinese patent application CN201710045009.8 provides a measuring device and a method capable of measuring normal force distribution and tangential force, and the position of the total gravity center of a human body (an object with a small volume on the earth surface, the gravity center and the mass center are coincident) and the total mass of the human body are calculated by analyzing the moment of one point according to the forces of four beams.
B) Change of human bodyThe body segment posture is kept unchanged without measuring the body segment posture. The included angle between the measured body segment and the vertical axis is gamma 2, and the mass of the measured body segment is M1The coordinate of the horizontal plane of the centroid is (X)1’，Y1') Total body Mass M2The coordinate of the total centroid horizontal plane is (X)2，Y2). Wherein the total mass M of the human body2Position of the general center of mass of the human body (X)2’，Y2') can be measured by a force measuring platform. Mass of unmeasured section M3Since the posture of the unmeasured body section of the human body is not changed, the coordinate of the centroid horizontal plane of the unmeasured body section is (X)3，Y3)。
C) And obtaining the length L from the centroid position of the detected body segment to the rotary joint (the connecting joint of the detected body segment and the undetected human body) according to the national standard GB/T17245-2004.
I.e. knowing the change X of the X-axis coordinate of the body segment to be measured1-X1' L (sin γ 1-sin γ 2) (the posture of the body segment to be measured changes in the coronal plane), the change of the Y-axis coordinate (the posture of the body segment to be measured changes in the sagittal plane), Y1-Y1' -L (sin γ 1-sin γ 2), according to the centroid theorem:
Figure BDA0001574653360000041
(Change of posture in coronal plane)
Or
Figure BDA0001574653360000042
(changing posture in the sagittal plane).
Wherein, L in the above formula is the length from the centroid position of the measured body segment to the rotary joint.
In another embodiment of the measurement method, the body segment to be measured changes posture in any plane, and at this time, the detection device collects the angle γ between the body segment to be measured and the vertical axis, and the included angles α, β between the projection of the body segment to be measured on the XOY plane and the X, Y axis, and measures according to the following manner:
initially, the angle between the segment to be measured and the vertical axis is γ 1, and the segment to be measured is at XOThe projection of the Y plane and the X, Y axis form included angles alpha 1 and beta 1. Let the mass of the section to be measured be M1The coordinate of the horizontal plane of the centroid is (X)1，Y1) (ii) a Mass of unmeasured section M3The coordinate of the horizontal plane of the centroid is (X)3，Y3) (ii) a Total mass of human body is M2The coordinate of the total centroid horizontal plane is (X)2，Y2). Wherein the total mass M of the human body2Position of the general center of mass of the human body (X)2，Y2) And can be measured by a force measuring platform.
Changing the posture of a tested body segment of a human body, keeping the posture of an untested body segment unchanged, wherein the included angle between the tested body segment and a vertical axis is gamma 2 (gamma 2 is not equal to gamma 1), the included angle between the projection of the tested body segment on an XOY plane and an X, Y axis is alpha 2 and beta 2, the mass of the tested body segment is M1, the coordinates of a centroid horizontal plane are (X1 ', Y1'), the total mass of the human body is M2, and the coordinates of the total centroid horizontal plane are (X2 and Y2). Wherein the total mass M2 of the human body and the position (X2 ', Y2') of the total mass center of the human body can be measured by the force measuring platform. The mass of the unmeasured section is M3, and since the posture of the unmeasured section of the human body is not changed, the coordinates of the centroid horizontal plane of the unmeasured section are (X3, Y3).
And obtaining the length L from the centroid position of the detected body segment to the rotary joint (the connecting joint of the detected body segment and the undetected human body) according to the national standard GB/T17245-2004. Namely, the change of the X-axis coordinate of the human body measured segment is known:
X1-X1' -L (sin γ 1cos α 1-sin γ 2cos α 2), change in Y-axis coordinate:
Y1-Y1' -L (sin γ 1cos β 1-sin γ 2cos β 2), according to the centroid theorem:
Figure BDA0001574653360000051
or
Figure BDA0001574653360000052
The mass of the measured body segment of the human body is calculated.
In yet another embodiment of the present invention, the centroid position of the upper half of the human body above the lumbar spine is obtained and the mass of the upper half is measured according to the method.
a. The method for measuring the head and neck quality comprises the following steps:
obtaining the length L from the center of mass of the head and the neck to the rotary joint according to the national standard GB/T17245-20040. Let the mass of the human head and neck be m1The mass of the human body after the head and neck are removed is m2The head and neck can keep the relative position of the head and the neck unchanged only by changing the posture of the head and the neck in the coronal plane. In the initial position, the included angle between the human head and neck and the vertical axis is gamma in the coronal plane (parallel to the X axis of the force measuring platform)1 head and neckAt this time, the coordinate of the mass center of the human head and neck on the horizontal plane is (X)1，Y1) The coordinate of the human body mass center on the horizontal plane after the head and neck are removed is (X)2，Y2) The coordinates (Xi, Yi) of the total mass center of the human body on the horizontal plane and the total mass M of the human body are measured by the force measuring platform.
The head and neck posture is changed (the head and neck posture and the initial position are in the same plane), and the posture of the unmeasured section is kept unchanged. At the moment, the included angle between the head and the neck and the vertical axis is gamma2 head and neck(γ2 head and neckIs not equal to gamma1 head and neck) Because the head and neck only change the posture in the plane parallel to the X coordinate axis, the coordinate only changes on the X coordinate axis, and the coordinate of the horizontal plane of the mass center of the head and neck is (X)1’，Y1) And measuring the coordinates (Xi', Yi) of the horizontal plane of the total mass center of the human body by the force measuring platform. The coordinate of the centroid horizontal plane of the non-measured body segment is (X) because the posture of the non-measured body segment is not changed2，Y2)。
Namely the change X of the coordinate on the X axis of the human head and neck1-X1'＝L0(sinGamma 1 head and neck-sinGamma 2 head and neck)
According to the centroid theorem:
Figure BDA0001574653360000061
namely, the mass m of the human head and neck is calculated1。
b. Calculation of human right hand mass
Obtaining the length L from the centroid of the right hand to the wrist joint according to the national standard GB/T17245-20041. Let the mass of the right hand of the human body be m3The mass of the body after the right hand removal is m4. In the initial position, the included angle between the right hand and the vertical axis of the human body is gamma in the coronal plane (parallel to the X axis of the force measuring platform)1 Right handAt this time, the coordinate of the mass center of the right hand of the human body on the horizontal plane is (X)3，Y3) The coordinate of the centroid of the human body excluding the right hand on the horizontal plane is (X)4，Y4) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i，Yi) And the total mass M of the human body.
And changing the posture of the right hand (in the same plane with the initial position) and keeping the posture of the unmeasured section unchanged. At the moment, the included angle between the right hand and the vertical axis is gamma2 Right hand(γ2 Right handIs not equal to gamma1 Right hand) Since the right hand changes the posture only in a plane parallel to the X coordinate, the coordinate changes only on the X coordinate axis. The coordinate of the horizontal plane of the mass center of the right hand is (X)3’，Y3) Measuring the coordinate (X) of the horizontal plane of the total mass center of the human body by the force measuring platformi’，Yi). The coordinate of the centroid horizontal plane of the non-measured body segment is (X) because the posture of the non-measured body segment is not changed4，Y4)。
Namely, the change X of the coordinate of the right hand of the human body on the X axis is known3-X3'＝L1(sinGamma 1 right hand-sinGamma 2 right hand)
According to the centroid theorem:
Figure BDA0001574653360000071
namely, the mass m of the right hand of the human body is calculated3. The quality of the left hand can be determined in the same way.
When the hand changes posture in the sagittal plane (the sagittal plane is parallel to the y axis), the change of the coordinate of the hand on the coordinate axis parallel to the sagittal plane is measured. According to the centroid theorem, the change of the hand mass can be measured. When the right hand of the human body changes on any plane, the corresponding coordinate change can be measured only according to the national standard, and the quality of the right hand of the human body can be measured according to the centroid theorem.
c. Quality measurement method of right forearm
According to the national standard GB/T17245-2004 knowledge: the length from the center of mass of the right forearm to the elbow joint is L3The total length of the right forearm is L2. Calculating the mass of the right front arm of the human body: let the mass of the right forearm of the human body be m5The mass of the human body excluding the right hand and the right front arm is m6. In the initial position, the included angle between the right forearm and the vertical axis of the human body is gamma in the coronal plane (parallel to the X axis of the force measuring platform)1 Right front armThe angle between the right hand and the vertical axis is theta1 Right hand. The coordinate of the mass center of the right forearm of the human body on the horizontal plane is (X)5，Y5) The coordinate of the right hand is (X)5-L3sinγ1 Right front arm+L2sinγ1 Right front arm+L1sinθ1 Right hand，Y5) The coordinate of the centroid of the human body excluding the right hand and the right forearm on the horizontal plane is (X)6，Y6) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i，Yi) And the total mass M of the human body.
The posture of the right forearm is changed, the posture of the right hand is changed (the right hand and the initial position are in the same plane), and the posture of the unmeasured body section is kept unchanged. At the moment, the included angle between the right forearm and the vertical axis is gamma2 right front arm(γ2 right front armIs not equal to gamma1 Right front arm) The angle between the right hand and the vertical axis is theta2 Right hand. The posture of the right forearm changes in a plane parallel to the X coordinate axis, so that the coordinates of the right forearm and the right hand only change on the X coordinate axis, and the coordinate of the horizontal plane of the mass center of the right forearm is (X)5’，Y5) The coordinate of the right hand is (X)5’-L3sinγ2 right front arm+L2sinγ2 right front arm+L1sinθ2 Right hand，Y5). The coordinate (X) of the horizontal plane of the total mass center of the human body is measured by the force measuring platformi’，Yi). The coordinate of the centroid horizontal plane of the non-measured body segment is (X) because the posture of the non-measured body segment is not changed6，Y6)。
Namely to knowThe change in coordinates on the x-axis of the right forearm of the human body is: x6-X6'＝L3(sinGamma 1 right front arm-sinGamma 2 right front arm) The change in coordinates on the right hand x-axis is: Δ XRight hand＝L2(sinGamma 1 right front arm-sinGamma 2 right front arm)+L1(sinTheta 1 right hand-sinTheta 2 right hand)。
The formula of mass derived from the centroid theorem is as follows:
Figure BDA0001574653360000081
namely: calculating the mass m of the right forearm of the human body5The mass of the left forearm was calculated in the same way.
When the right forearm of the human body changes posture in the sagittal plane (the sagittal plane is parallel to the y axis). It is only necessary to measure the change of its coordinates on a coordinate axis parallel to the sagittal plane. According to the centroid theorem, the mass change of the right forearm can be measured. When the right forearm of the human body changes on any plane, the corresponding coordinate change can be measured only according to the national standard, and the mass of the right forearm of the human body can be measured according to the barycenter theorem.
d. Quality measuring method of right upper arm
Obtaining the length L from the center of mass of the right upper arm to the shoulder joint according to the national standard GB/T17245-20045. The total length of the right upper arm is L4And calculating the mass of the right upper arm of the human body: let the mass of the right upper arm of the human body be m7The mass of the human body excluding the right hand, the right forearm and the right upper arm is m8. At the initial position, in the coronal plane (parallel to the X-axis of the force measuring platform), the included angle between the right upper arm and the vertical axis of the human body is gamma1 the upper right armThe included angle between the right forearm and the vertical axis of the human body is lambda1The right forearm, right hand and vertical axis form an included angle theta1 Right handAt this time, the coordinate of the mass center of the right upper arm of the human body on the horizontal plane is (X)7，Y7) The coordinates of the right forearm are: (X)7-L5sinγ1 the upper right arm+L4sinγ1 the upper right arm+L3sinλ1 Right front arm，Y7) Of the right hand typeThe coordinate is (X)7-L5sinγ1 the upper right arm+L4sinγ1 the upper right arm+L2sinλ1 Right front arm+L1sinθ1 Right hand，Y7) The coordinate of the centroid of the human body excluding the right hand and the right forearm on the horizontal plane is (X)8，Y8) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i，Yi) And the total mass M of the human body.
And changing the posture of the right upper arm, wherein the postures of the right hand and the right front arm are changed (are in the same plane with the initial position), and keeping the posture of the unmeasured section unchanged. At the moment, the included angle between the upper right arm and the vertical axis is gamma2 the upper right arm(γ2 the upper right armIs not equal to gamma1 the upper right arm) The included angle between the right forearm and the vertical axis of the human body is lambda2 right front armThe angle between the right hand and the vertical axis is theta2 Right hand. Because the posture of the right upper arm changes in a plane parallel to the X coordinate axis, only the coordinate on the X coordinate axis changes, and the coordinate of the mass center of the right upper arm of the human body on the horizontal plane is (X)7’，Y7) The coordinates of the right forearm are: (X)7’-L5sinγ2 the upper right arm+L4sinγ2 the upper right arm+L3sinλ2 right front arm，Y7) The coordinate of the right hand is (X)7’-L5sinγ2 the upper right arm+L4sinγ2 the upper right arm+L2sinλ2 right front arm+L1sinθ2 Right hand，Y7) The coordinate of the centroid of the human body excluding the right hand and the right forearm on the horizontal plane is (X)8，Y8) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i’，Yi)。
I.e. knowing the change in coordinates on the X-axis of the right upper arm of the human body to L5(sinγ1 the upper right arm-sinγ2 the upper right arm): the change in coordinates on the X-axis of the human right forearm: (L)4(sinγ1 the upper right arm-sinγ2 the upper right arm)+L3(sinλ1 Right front arm-sinλ2 right front arm) Change of coordinates on the right-hand X-axis: ((L)4(sinγ1 the upper right arm-sinγ2 the upper right arm)+L2(sinλ1 Right front arm-sinλ2 right front arm)+L1(sinθ1 Right hand-sinθ2 Right hand))。
The formula of mass derived from the centroid theorem is as follows:
Figure BDA0001574653360000091
namely, the mass m of the upper right arm of the human body is calculated7The mass of the left upper arm of the human body is calculated by the same method.
I.e. mass M of the right arm of the human bodyRight arm＝m3+m5+m7. The mass of the left arm of the human body is calculated by the same method. When the human right upper arm changes posture in the sagittal plane (the sagittal plane is parallel to the y axis). It is only necessary to measure the change in its coordinates on a coordinate axis parallel to the sagittal plane. According to the centroid theorem, the mass change of the right upper arm can be measured. When the right upper arm of the human body changes on any plane, the corresponding coordinate change can be measured only according to the national standard, and the mass of the right upper arm of the human body can be measured according to the centroid theorem.
e. Calculation of human right foot mass
Obtaining the distance L from the center of mass of the right foot to the ankle joint according to the national standard GB/T17245-20046. Let the mass of the right foot of the human body be m9The mass of the human body after the right foot is removed is m10. In the initial position, the included angle between the right foot and the vertical axis is gamma in the sagittal plane (perpendicular to the coronal plane and Y-axis as the coordinate axis parallel to the sagittal plane)1 Right footAt this time, the coordinate of the mass center of the right foot of the human body on the horizontal plane is (X)9，Y9) The coordinate of the centroid of the human body excluding the right foot on the horizontal plane is (X)10，Y10) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i，Yi) And the total mass M of the human body.
Changing the posture of the right foot (in the same plane with the initial position), and keeping the posture of the unmeasured section unchanged. At the moment, the included angle between the right foot and the vertical axis is gamma2 right foot(γ2 right footIs not equal to gamma1 Right foot) Because the posture of the right foot is changed only in the plane parallel to the Y coordinate axis, the coordinate is changed only on the Y coordinate axis, and the coordinate of the horizontal plane of the centroid of the right foot is (X)9，Y9'). The coordinate (X) of the horizontal plane of the total mass center of the human body is measured by the force measuring platformi，Yi'). The coordinate of the centroid horizontal plane of the non-measured body segment is (X) because the posture of the non-measured body segment is not changed10，Y10)。
Namely, the change Y of the coordinate of the right foot of the human body on the Y axis is known9-Y9'＝L6(sinGamma 1 right foot-sinGamma 2 right foot)。
According to the centroid theorem:
Figure BDA0001574653360000101
namely, the mass m of the right foot of the human body is calculated9The mass of the left foot can be measured in the same way.
f. Method for measuring mass of right shank
Obtaining the total length L of the right crus according to the national standard GB/T17245-20048The length from the center of mass of the right calf to the knee joint is L7Calculating the mass of the right shank of the human body: let the mass of the right shank of the human body be m11The mass of the human body excluding the right foot and the right shank is m12. The right calf can only change posture in the sagittal plane according to the human body structure. Therefore, in the initial position, in the sagittal plane (perpendicular to the coronal plane, and the Y axis is defined as the coordinate axis parallel to the sagittal plane), the included angle between the right and the vertical axes of the human body is gamma1 right lower legThe right foot and the vertical axis form an included angle theta1 Right footAt this time, the coordinate of the mass center of the right calf of the human body on the horizontal plane is (X)11，Y11) The coordinate of the right foot is (X)11，Y11-L7sinγ1 right lower leg+L8sinγ1 right lower leg+L6sinθ1 Right foot) The coordinate of the center of mass of the human body excluding the right foot and the right calf on the horizontal plane is (X)12，Y12) The total mass center of the human body is measured by the force measuring platformThe coordinate of the horizontal plane is (X)i，Yi) And the total mass M of the human body.
The posture of the right lower leg is changed, the posture of the right foot is changed (the right foot and the initial position are in the same plane), and the posture of the unmeasured section is kept unchanged. At the moment, the included angle between the right shank and the vertical axis is gamma2 right shankThe right foot and the vertical axis form an included angle theta2 right foot。(γ2 right shankIs not equal to gamma 1Right crus). Because the posture of the right lower leg is changed in a plane parallel to the Y coordinate axis, the coordinate is changed only on the Y coordinate axis, and the coordinate of the horizontal plane of the centroid of the right lower leg is (X)11，Y11') and the coordinate of the right foot is (X)11,Y11’-L7sinγ2 right shank+L8sinγ2 right shank+L6sinθ2 right foot). The coordinate (X) of the horizontal plane of the total mass center of the human body is measured by the force measuring platformi，Yi'). The coordinate of the centroid horizontal plane of the non-measured body segment is (X) because the posture of the non-measured body segment is not changed12，Y12)。
I.e. knowing the change of coordinates on the Y-axis of the right calf of the human body: y is12-y12'＝L7(sinGamma 1 right shank-sinGamma 2 right crus) The change of the coordinates on the right foot Y-axis is:
Δyright foot＝L8(sinGamma 1 right shank-sinGamma 2 right crus)+L6(sinTheta 1 right foot-sinTheta 2 right foot)。
According to the centroid theorem:
Figure BDA0001574653360000111
namely: calculating the mass m of the right shank of the human body11The mass of the left calf was calculated in the same way.
g. Method for measuring mass of right thigh
The human thigh can change the posture in any plane. Obtaining the length from the center of mass of the right thigh to the hip joint according to the national standard GB/T17245-2004Is L9. The total length of the right thigh is L10And calculating the mass of the right thigh of the human body: let the mass of the right thigh of the human body be m13The mass of the human body excluding the right foot, the right calf and the right thigh is m14。
In the initial position, the included angle between the right thigh and the vertical axis is gamma in the sagittal plane (perpendicular to the coronal plane and defined as Y-axis parallel to the sagittal plane)1 right thighThe included angle between the right shank and the vertical axis of the human body is lambda1 right lower legThe right foot and the vertical axis form an included angle theta1 Right footAt this time, the coordinate of the center of mass of the right thigh of the human body on the horizontal plane is (X)13，Y13) And the coordinates of the right calf are: (X)13，Y13-L9sinγ1 right thigh+L10sinγ1 right thigh+L7sinλ1 right lower leg) The coordinate of the right foot is (X)13，Y13-L9sinγ1 right thigh+L10sinγ1 right thigh+L8sinλ1 right lower leg+L6sinθ1 Right foot) The coordinate of the center of mass of the human body excluding the right foot and the right calf on the horizontal plane is (X)14，Y14) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i，Yi)。
The posture of the right thigh is changed, and the posture of the right foot and the posture of the right calf are changed (the same plane with the initial position), so that the posture of the unmeasured section is kept unchanged. At the moment, the included angle between the right thigh and the vertical axis is gamma2 right thigh(γ2 right thighIs not equal to gamma1 right thigh) The included angle between the right shank and the vertical axis of the human body is lambda2 right shankThe right foot and the vertical axis form an included angle theta2 right foot. Because the posture of the right thigh is changed in a plane parallel to the Y coordinate axis, only the coordinate on the Y coordinate axis is changed, and the coordinate of the mass center of the right thigh of the human body on the horizontal plane is (X)13，Y13'), coordinates of the right calf are: (X)13，Y13’-L9sinγ2 right thigh+L10sinγ2 right thigh+L7sinλ2 right shank) The coordinate of the right foot is (X)13，Y13’-L9sinγ2 right thigh+L10sinγ2 right thigh+L8sinλ2 right shank+L6sinθ2 right foot) The coordinate of the center of mass of the human body excluding the right foot, the right calf and the right thigh on the horizontal plane is (X)14，Y14) The coordinate of the total mass center of the human body on the horizontal plane is measured by the force measuring platform as (X)i，Yi’)。
I.e. knowing the change in co-ordinates of the right thigh of the human body in the Y-axis9(sinγ1 right thigh-sinγ2 right thigh): the change of the coordinates on the Y-axis of the human right calf is: (L)10(sinγ1 right thigh-sinγ2 right thigh)+L7(sinλ1 right lower leg-sinλ2 right shank) Change of coordinates on the right foot Y-axis: ((L)10(sinγ1 right thigh-sinγ2 right thigh)+L8(sinλ1 right lower leg-sinλ2 right shank)+L6(sinθ1 Right foot-sinθ2 right foot))。
The following mass formula can be obtained according to the centroid theorem:
Figure BDA0001574653360000121
namely, the mass m of the right thigh of the human body is calculated7The mass of the left thigh of the human body is calculated by the same method.
I.e. the mass M of the right leg of the human bodyRight leg＝m9+m11+m13. The mass of the left leg was calculated in the same way.
When the right thigh of the human body changes the posture in the coronal plane (the coronal plane is parallel to the X-axis), only the change of the position of the right thigh of the human body on the coordinate axis parallel to the coronal plane needs to be measured. According to the centroid theorem, the mass change of the right thigh can be measured. When the right thigh of the human body changes on any plane, the corresponding coordinate change is measured only according to the national standard, and the mass of the right thigh of the human body can be measured according to the centroid theorem.
MHuman body trunk＝MGross mass of human bodyMeasurement of-MHuman limbs-MHead and neck
If the position of the mass center of the upper half of the human body above the lumbar vertebra can be obtained in the future, the mass of the upper half of the human body can be calculated according to the method.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A method for measuring the mass of a body segment, comprising the steps of:
the method comprises the following steps of firstly, obtaining the length from the mass center of each measured human body segment of a measured person to a rotary joint, wherein the rotary joint is a connecting joint of the measured human body segment and an unmeasured human body;
step two, wearing a detection device on each body segment to be detected of a person to be detected and providing a force measuring platform, wherein the detection device is used for acquiring the change of an included angle between the body segment to be detected and a vertical shaft, and further calculating the coordinate change of a mass center, and the force measuring platform is used for acquiring the total mass and the total mass center horizontal plane coordinate of the person to be detected;
thirdly, the measured person measures by adopting a standing posture state of standing on the force measuring platform, acquires the included angle between the measured body segment and the vertical axis and the total barycentric coordinate corresponding to the measured body segment before and after the posture change according to the mode that the posture of the unmeasured body segment is kept unchanged and the posture of the measured body segment is changed, calculates the barycentric coordinate change of the measured body segment, then calculates the mass of the measured body segment according to the barycentric theorem,
wherein, the mass of the hand, the forearm and the upper arm is obtained according to the measuring sequence of the hand, the forearm and the upper arm, the mass of the foot, the calf and the thigh is obtained according to the measuring sequence of the foot, the calf and the thigh, the head and the neck are measured at any measuring stage, and finally the torso mass is calculated,
the detection device is an attitude sensor and is used for detecting an included angle gamma between the detected human body segment and the vertical axis when the attitude of the detected human body segment is changed in the coronal plane or the sagittal plane,
the third step comprises the following steps:
A) when the human body is initially stood, the posture of the body segment to be measured is changed in a sagittal plane or a coronal plane, the coronal plane of the human body is parallel to a coordinate axis X or Y of the force measuring platform, the included angle between the body segment to be measured and a vertical axis is measured to be gamma 1, and the total mass M of the human body at the moment2And the position coordinate (X) of the total center of mass of the human body2，Y2) The measured-out of the force-measuring platform,
B) changing the posture of the body segment to be measured, keeping the posture of the body segment not to be measured, measuring the included angle between the body segment to be measured and the vertical axis as gamma 2, wherein gamma 2 is not equal to gamma 1, and the total mass M of the human body at the moment2And the position of the total center of mass (X) of the human body2’，Y2') is measured by the force-measuring platform,
C) calculating the mass M of the body segment to be measured according to a mass formula derived from the centroid theorem1The mass formula is as follows:
when the pose is changed in the coronal plane,
Figure FDA0003060516650000021
or
When the posture is changed in the sagittal plane,
Figure FDA0003060516650000022
wherein, L in the above formula is the length from the centroid position of the measured human body segment to the rotary joint, wherein the rotary joint is the connecting joint of the measured human body segment and the unmeasured human body.
2. The method of claim 1, wherein step one further comprises acquiring the position of the center of mass of the upper body above the lumbar spine of the human body, and the measured body segment mass calculated in step three comprises the upper body mass of the torso.
3. A method for measuring the mass of a body segment, comprising the steps of:
the method comprises the following steps of firstly, obtaining the length from the mass center of each measured human body segment of a measured person to a rotary joint, wherein the rotary joint is a connecting joint of the measured human body segment and an unmeasured human body;
step two, wearing a detection device on each body segment to be detected of a person to be detected and providing a force measuring platform, wherein the detection device is used for acquiring the change of an included angle between the body segment to be detected and a vertical shaft, and further calculating the coordinate change of a mass center, and the force measuring platform is used for acquiring the total mass and the total mass center horizontal plane coordinate of the person to be detected;
thirdly, the measured person measures by adopting a standing posture state of standing on the force measuring platform, acquires the included angle between the measured body segment and the vertical axis and the total barycentric coordinate corresponding to the measured body segment before and after the posture change according to the mode that the posture of the unmeasured body segment is kept unchanged and the posture of the measured body segment is changed, calculates the barycentric coordinate change of the measured body segment, then calculates the mass of the measured body segment according to the barycentric theorem,
wherein, the mass of the hand, the forearm and the upper arm is obtained according to the measuring sequence of the hand, the forearm and the upper arm, the mass of the foot, the calf and the thigh is obtained according to the measuring sequence of the foot, the calf and the thigh, the head and the neck are measured at any measuring stage, and finally the torso mass is calculated,
the detection device is also used for acquiring included angles alpha and beta between the projection of the body segment to be detected on the XOY plane and the X axis and the Y axis respectively,
the third step comprises the following steps:
A) initially, the included angle between the body segment to be measured and the vertical axis is γ 1, the included angle between the projection of the body segment to be measured on the XOY plane and the X, Y axis is α 1 and β 1, and the total mass M of the human body at this time2And the position coordinate (X) of the total center of mass of the human body2，Y2) Measuring by the force measuring platform;
B) changing the posture of the body segment to be measured, keeping the posture of the body segment not to be measured, making the included angle between the body segment to be measured and the vertical axis be gamma 2, in which gamma 2 is not equal to gamma 1, and making the projection of the body segment to be measured on XOY plane and X, Y,The included angle of the Y axis is alpha 2 and beta 2, and the total mass M of the human body at the moment2And the position of the total center of mass (X) of the human body2’，Y2') measured from said force platform; and
C) calculating the mass M of the body segment to be measured according to a mass formula derived from the centroid theorem1The mass formula is as follows:
Figure FDA0003060516650000031
and L in the above formula is the length from the centroid position of the measured human body segment to the rotary joint, wherein the rotary joint is the connecting joint of the measured human body segment and the unmeasured human body.
4. A method for body segment mass measurement as claimed in claim 3 wherein step one further comprises acquiring the position of the center of mass of the upper body above the lumbar spine of the human body, the measured body segment mass calculated in step three comprising the upper body mass of the torso.
CN201810130234.6A 2018-02-08 2018-02-08 Human body segment quality measuring method Active CN108309301B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810130234.6A CN108309301B (en) 2018-02-08 2018-02-08 Human body segment quality measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810130234.6A CN108309301B (en) 2018-02-08 2018-02-08 Human body segment quality measuring method

Publications (2)

Publication Number Publication Date
CN108309301A CN108309301A (en) 2018-07-24
CN108309301B true CN108309301B (en) 2021-06-22

Family

ID=62902248

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810130234.6A Active CN108309301B (en) 2018-02-08 2018-02-08 Human body segment quality measuring method

Country Status (1)

Country Link
CN (1) CN108309301B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109323743B (en) * 2018-11-29 2024-01-12 四川航天计量测试研究所 Human body quality measuring device under microgravity environment
CN111637959B (en) * 2020-06-11 2021-12-03 中汽研汽车检验中心（天津）有限公司 Method for testing position and quality of mass center of each part of human body
CN114427932B (en) * 2022-04-07 2022-06-17 中国汽车技术研究中心有限公司 Centroid measuring method and centroid measuring instrument for collision dummy

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1682649A (en) * 2004-04-16 2005-10-19 金季春 Method and device for measuring human ring section weight
CN102944200A (en) * 2012-11-01 2013-02-27 沈阳工业大学 Method for obtaining hip joint angle and displacement from hip joint center to platform
KR101670134B1 (en) * 2014-10-30 2016-10-28 한경대학교 산학협력단 Diagnosis Apparatus For Dizziness
CN104856686B (en) * 2015-05-08 2017-10-17 南通大学 A kind of thoracolunbar spine or so lateral bending motions are in real time in bulk measurement method
CN107607151B (en) * 2017-07-17 2019-11-15 金季春 A kind of measurement weights and center of gravity of moving segments of human body parametric technique
CN107320106B (en) * 2017-08-11 2023-03-21 合肥哈工慈健智能科技有限公司 Device for measuring gravity center position of human body during hand-held standing

Also Published As

Publication number Publication date
CN108309301A (en) 2018-07-24

Similar Documents

Publication Publication Date Title
Robert-Lachaine et al. Effect of local magnetic field disturbances on inertial measurement units accuracy
Aminian et al. Capturing human motion using body‐fixed sensors: outdoor measurement and clinical applications
Zhang et al. Concurrent validation of Xsens MVN measurement of lower limb joint angular kinematics
Roetenberg et al. Xsens MVN: Full 6DOF human motion tracking using miniature inertial sensors
Lin et al. Human pose recovery using wireless inertial measurement units
WO2017014294A1 (en) Gait analysis method and gait analysis system
KR102010898B1 (en) System and method for Gait analysis
Lee et al. 3D spinal motion analysis during staircase walking using an ambulatory inertial and magnetic sensing system
US20080091373A1 (en) Method for calibrating sensor positions in a human movement measurement and analysis system
US20150032034A1 (en) Apparatus and method for quantifying stability of the knee
WO2015162158A1 (en) Human motion tracking
CN108309301B (en) Human body segment quality measuring method
WO2017004403A1 (en) Biomechanical information determination
Hebert et al. A method of measuring three-dimensional scapular attitudes using the optotrak probing system
CN110059670A (en) Human body Head And Face, limb activity angle and body appearance non-contact measurement method and equipment
JP6678492B2 (en) Dynamic balance evaluation device
Wong et al. Measurement of postural change in trunk movements using three sensor modules
Hu et al. A study on estimation of planar gait kinematics using minimal inertial measurement units and inverse kinematics
Iino et al. Validity of the top-down approach of inverse dynamics analysis in fast and large rotational trunk movements
JP5427679B2 (en) Floor reaction force measurement system and method
Zebin et al. Inertial sensing for gait analysis and the scope for sensor fusion
CN108392204B (en) Human body segment quality measuring method and device
CN208822751U (en) Body section apparatus for measuring quality
Hanawa et al. Validity of inertial measurement units in assessing segment angles and mechanical energies of elderly persons during sit-to-stand motion
Hellmers et al. Validation of a motion capture suit for clinical gait analysis

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant