WO2016158425A1 - Appareil de mesure de charge - Google Patents

Appareil de mesure de charge Download PDF

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Publication number
WO2016158425A1
WO2016158425A1 PCT/JP2016/058365 JP2016058365W WO2016158425A1 WO 2016158425 A1 WO2016158425 A1 WO 2016158425A1 JP 2016058365 W JP2016058365 W JP 2016058365W WO 2016158425 A1 WO2016158425 A1 WO 2016158425A1
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WO
WIPO (PCT)
Prior art keywords
sheet
elastic body
conductive elastic
load
bodies
Prior art date
Application number
PCT/JP2016/058365
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English (en)
Japanese (ja)
Inventor
田中　守
勇三 今堀
山口　和也
計之 藤本
正光 小谷
Original Assignee
株式会社 イマック
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 株式会社 イマック filed Critical 株式会社 イマック
Priority to JP2017509541A priority Critical patent/JP6522740B2/ja
Publication of WO2016158425A1 publication Critical patent/WO2016158425A1/fr

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/44—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes

Definitions

  • the present invention relates to a load measuring device including a load sensor portion provided on the inner bottom of footwear.
  • a load measuring device including a load sensor unit provided on the inner bottom of footwear is known.
  • This load measuring device can measure the load applied to the lower limbs during free walking. Therefore, it is useful for rehabilitation of the lower limbs and the like that gradually increase the load applied to the lower limbs.
  • Some of these load measuring devices electrically detect a change in capacitance due to a load in the load sensor unit.
  • the capacitance is changed corresponding to partial loads formed on shoe soles and applied to each part of the sole (the rear foot part, the left front foot part, and the right front foot part).
  • a walking factor analyzer load measuring device having a plurality of variable capacitance pressure sensors (load sensor units) is disclosed.
  • the change in capacitance of the variable capacitor of the variable capacitance pressure sensor is taken out as a change in pulse oscillation frequency.
  • This walking factor analyzer can measure the partial load of each part and analyze the walking state more strictly.
  • Patent Document 2 discloses a load measuring unit (load sensor unit) that is formed in conformity with the contour shape of the back surface of the wearer's foot and detects capacitance at a plurality of locations on the back surface of the foot that changes due to weight shift.
  • a center-of-gravity position detection device (load measurement device) is disclosed. Time until one of the upper electrode and the lower electrode forming the capacitance is connected to GND and the other is connected to a constant voltage power source, and the voltage value between the upper electrode and the lower electrode reaches a predetermined value To calculate the capacitance.
  • the center-of-gravity position detection device can detect the movement of the center-of-gravity position.
  • Patent Document 3 a sheet-like elastic body in which a large number of voids or depressions are periodically provided and a flat sheet-like elastic body made of the same material are used as dielectrics, and these dielectrics are sandwiched.
  • a load measuring device having a load sensor portion formed by forming two capacitors using three sheet-like conductive elastic bodies as electrodes is disclosed. This load measuring device detects the total amount of load that is distributed across the load sensor section, and differentially detects the change in capacitance due to the load of the two capacitors. Therefore, it is possible to measure with higher accuracy than those described in Patent Documents 1 and 2.
  • the present invention has been made in view of the above reasons, and its purpose is to measure the partial load applied to each part of the sole, and to measure stably and highly accurately with respect to environmental changes such as noise and temperature. It is in providing the load measuring device which can do.
  • a load measuring device includes a first sheet-like elastic body provided with a large number of gaps or depressions and a flat second sheet made of the same material.
  • a plurality of first sheet-like elastic bodies sandwiched between the first sheet-like conductive elastic body and the first sheet-like conductive elastic body.
  • Two sheet-like conductive elastic bodies, and a second sheet-like conductive elastic body sandwiching the second sheet-like elastic bodies between the plurality of second sheet-like conductive elastic bodies.
  • An electric circuit unit including a current output circuit and a current measurement circuit that measures each alternating current flowing through the terminals of the plurality of second sheet-like conductive elastic bodies and converts each alternating current into a load measurement voltage. .
  • the plurality of second sheet-like conductive elastic bodies have a shape in which a single sheet-like conductive elastic body is divided into a plurality of portions by thin grooves.
  • the plurality of second sheet-like conductive elastic bodies are four of a thumb side front part, a little finger side front part, a thumb side rear part, and a little finger side rear part.
  • the load measuring apparatus of the present invention it is possible to measure the partial load applied to each part of the sole, and it is possible to measure stably and accurately with respect to environmental changes such as noise and temperature.
  • the load measuring device 1 includes a load sensor unit 2 and an electric circuit unit 3.
  • the load sensor unit 2 is provided on the inner bottom 4a of the footwear 4 as shown in FIG.
  • the load sensor unit 2 includes a first sheet-like elastic body 21 and a second sheet-like elastic body 22 as dielectrics, and a first sheet-like conductive elastic body 23 and a plurality of ( As shown in FIG. 1, a plurality of capacitors (a plurality of capacitors, for example, four) are used with the second sheet-like conductive elastic bodies 24a, 24b, 24c, 24d and the third sheet-like conductive elastic bodies 25 as electrodes.
  • First capacitors Ca 1 , Cb 1 , Cc 1 , Cd 1 and a plurality of second capacitors Ca 2 , Cb 2 , Cc 2 , Cd 2 ) are formed.
  • the first sheet-like elastic elastic body 23 and the second sheet-like conductive elastic body 24a are used as the first sheet-like elastic elastic body 24a.
  • the part sandwiching the body 21 forms the first capacitor Ca 1
  • the second sheet-like elastic body 24 a and the third sheet-like conductive elastic body 25 constitute the second sheet-like elastic body.
  • a portion where 22 is sandwiched forms a second capacitor Ca 2
  • the first capacitor Ca 1 and the second capacitor Ca 2 become the partial load sensor 2 a.
  • a portion in which the first sheet-like elastic body 21 is sandwiched between the first sheet-like conductive elastic body 23 and the second sheet-like conductive elastic body 24b forms a first capacitor Cb1, 2 of the sheet-like conductive elastic body 24b and the third sheet-like conductive elastic member 25 and the second sheet-like elastic member 22 a portion sandwiched sandwich form a second capacitor Cb 2, first The capacitor Cb 1 and the second capacitor Cb 2 serve as the partial load sensor 2b.
  • the first sheet-like conductive elastic body 23 and the first sheet-like elastic member 21 a portion sandwiched sandwiched between the second sheet-like conductive elastic body 24d is formed a first capacitor Cd 1, the 2 of the sheet-like conductive elastic body 24d and a third sheet-like conductive elastic member 25 and the second sheet-like elastic member 22 a portion sandwiched sandwich form a second capacitor Cd 2, first comprising capacitors Cd 1 between the second capacitor Cd 2 and partial load sensor 2d.
  • Each of the partial load sensors 2a to 2d detects the load (partial load) over the entire area defined by each of the second sheet-like conductive elastic bodies 24a to 24d.
  • the first sheet-like conductive elastic body 23 has a terminal 23t
  • the plurality of second sheet-like conductive elastic bodies 24a to 24d have terminals 24at, 24bt, 24ct, 24dt
  • a third sheet-like conductive elastic body 25 are provided with terminals 25t, respectively (see FIG. 1), connected to an electric circuit unit 3 to be described in detail later through wiring, and from the electric circuit unit 3 to the load sensor unit 2 or from the load sensor unit 2 to the electric circuit unit 3 An electrical signal (voltage or current) is sent to.
  • the load sensor unit 2 and the electric circuit unit 3 are used.
  • the number of wirings between is (number of partial load sensors 2a to 2d) +2.
  • the electric circuit unit 3 there are two AC output circuits for applying an AC voltage to the load sensor unit 2, a first AC output circuit 31 and a second AC output circuit 32. This means that the first sheet-like conductive elastic body 23 and the third sheet-like conductive elastic body 25 are not used in common in the partial load sensors 2a to 2d, and a plurality of first sheet-like conductive elastic bodies are used.
  • the number of wirings is (the number of partial load sensors 2a to 2d) ⁇ 3
  • the number of AC output circuits of the electric circuit unit 3 is Since (the number of partial load sensors 2a to 2d) ⁇ 2, when the first sheet-like conductive elastic body 23 and the third sheet-like conductive elastic body 25 are used in common by the partial load sensors 2a to 2d. This shows that the number of wirings and AC output circuits can be greatly reduced.
  • the conductive elastic body 25 is substantially the same as the shape of the inner bottom 4a of the footwear 4.
  • the first sheet-like elastic body 21 is provided with a large number of gaps or depressions 21s periodically, and the second sheet-like elastic body 22 is provided with the first sheet-like elasticity.
  • the body 21 is made of the same material (that is, a large number of voids or depressions are not provided periodically). Since the first sheet-like elastic body 21 is periodically provided with a large number of voids or depressions 21s, when a load is applied, the volume commensurate with the decrease in thickness expands in this portion, so that the load is almost equal to the load. The thickness changes proportionally. On the other hand, the second sheet-like elastic body 22 is so small that a change in thickness with respect to a load can be ignored.
  • the capacitance values of the plurality of first capacitors Ca 1 to Cd 1 and the plurality of second capacitors Ca 2 to Cd 2 can be expressed by the following equations, respectively.
  • Ca 1 ⁇ 1 ⁇ (Sa / da 1 )
  • Ca 2 ⁇ 2 ⁇ (Sa / d 2 )
  • Cb 1 ⁇ 1 ⁇ (Sb / db 1 )
  • Cb 2 ⁇ 2 ⁇ (Sb / d 2 )
  • Cc 1 ⁇ 1 ⁇ (Sc / dc 1 )
  • Cc 2 ⁇ 2 ⁇ (Sc / d 2 )
  • Cd 1 ⁇ 1 ⁇ (Sd / dd 1 )
  • Cd 2 ⁇ 2 ⁇ (Sd / d 2 )
  • the dielectric constants of the first sheet-like elastic body 21 and the second sheet-like elastic body 22 are respectively represented by ⁇ 1 and ⁇ 2 , and the areas of the plurality of second sheet-like
  • Sa 1 , db 1 , dc 1 are the thicknesses (average thicknesses) of the first sheet-like elastic bodies 21 of the plurality of second sheet-like conductive elastic bodies 24a to 24d, respectively. , Dd 1 .
  • the plurality of second sheet-like conductive elastic bodies 24a to 24d includes a single sheet-like conductive elastic body that is divided into a plurality (four in the figure) by thin groove portions 24g.
  • the shape is preferably divided. That is, it is preferable that the gaps between the plurality of second sheet-like conductive elastic bodies 24a to 24d are narrow.
  • the entire sole can be calculated by adding all the loads measured by the four parts of the thumb side front part, the little finger side front part, the thumb side rear part, and the little finger side rear part.
  • the load applied to the front of the sole can be calculated by adding the respective loads measured at the front of the thumb and the front of the little finger, and the load applied to the rear of the bottom of the foot It is possible to calculate by adding the respective loads measured at the rear part.
  • the first sheet-like elastic body 21 and the second sheet-like elastic body 22 include a first sheet-like conductive elastic body 23 such as insulating silicon rubber, and a plurality of second sheet-like conductive elastic bodies 24a. 24d, the third sheet-like conductive elastic body 25 can be made of conductive silicon rubber or the like. Also, a plurality of sheet-like elastic bodies 23 between the first sheet-like elastic elastic body 23 and the first sheet-like elastic body 21 and between the first sheet-like elastic body 21 and the plurality of second sheet-like conductive elastic bodies 24a to 24d. Between the second sheet-like conductive elastic bodies 24a to 24d and the second sheet-like elastic body 22, and between the second sheet-like elastic body 22 and the third sheet-like conductive elastic body 25, for example, is thin. It is possible to bond using an adhesive or the like.
  • the electric circuit unit 3 applies an AC voltage V 1 to the terminal 23 t of the first sheet-like conductive elastic body 23 and applies an AC current Ia to the plurality of first capacitors Ca 1 to Cd 1. 1 , Ib 1 , Ic 1 , Id 1 , and a plurality of second capacitors Ca by applying an AC voltage V 2 to the terminal 25 t of the third sheet-like conductive elastic body 25.
  • a second AC output circuit 32 for flowing AC currents Ia 2 , Ib 2 , Ic 2 , and Id 2, and AC currents flowing to terminals 24 at to 24 dt of the second sheet-like conductive elastic bodies 24 a to 24 d
  • a plurality of current measurement circuits 33a, 33b, 33c, and 33d that measure Ia 3 , Ib 3 , Ic 3 , and Id 3 and convert them into voltages (load measurement voltages Va, Vb, Vc, and Vd).
  • the load measurement voltages Va to Vd are voltages corresponding to the load distribution (partial load).
  • the AC voltage V 1 applied to the terminal 23 t of the first sheet-like conductive elastic body 23 and the AC voltage V 2 applied to the terminal 25 t of the third sheet-like conductive elastic body 25 are:
  • the ground potential is set as a reference potential
  • the terminals 24at to 24dt of the plurality of second sheet-like conductive elastic bodies 24a to 24d are set to be held at the same potential as the ground potential.
  • the first AC output circuit 31 and the second AC output circuit 32 have a phase difference of 180 degrees between the AC currents Ia 1 to Id 1 and the AC currents Ia 2 to Id 2 when no load is applied to the load sensor unit 2. If the AC voltage V 1 and the AC voltage V 2 are adjusted (offset zero adjustment) so that the amplitudes are equal, the AC currents Ia 1 to Id 1 flowing through the plurality of first capacitors Ca 1 to Cd 1 Since the alternating currents Ia 2 to Id 2 flow through the second Ca 2 to Cd 2, the alternating currents Ia 3 to Id are supplied to the terminals 24 at to 24 dt of the second sheet-like conductive elastic body 24, that is, the plurality of current measuring circuits 33 a to 33 d. 3 does not flow.
  • the offset zero adjustment can be performed as follows.
  • Ca 1 ⁇ 1 ⁇ (Sa / d 1 )
  • Cb 1 ⁇ 1 ⁇ (Sb / d 1 )
  • Cc 1 ⁇ 1 ⁇ (Sc / d 1)
  • Cd 1 ⁇ 1 ⁇ (Sd / d 1 ).
  • the thickness of the first sheet-shaped elastic body 21 as d 1.
  • the capacitance ratio of the capacitor of the first sheet-like elastic body 21 and the capacitor of the second sheet-like elastic body 22 in the conductive elastic bodies 24a to 24d is all constant.
  • the alternating current ratio Ia 1 / Ia 2 , Ib 1 / Ib 2 , Ic 1 / Ic 2 , Id 1 / Id 2 are V 1 ⁇ Ca 1 / V 2 ⁇ Ca 2 , V 1 ⁇ Cb 1 / V 2 ⁇ Cb 2 , V 1 ⁇ Cc, respectively. Since 1 / V 2 ⁇ Cc 2 and V 1 ⁇ Cd 1 / V 2 ⁇ Cd 2 , they are all 1.
  • the alternating currents Ia 1 to Id 1 flowing through the plurality of first capacitors Ca 1 to Cd 1 flow as the alternating currents Ia 2 to Id 2 through the plurality of second capacitors Ca 2 to Cd 2 , and the second sheet AC currents Ia 3 to Id 3 do not flow through the terminals 24at to 24dt of the conductive elastic bodies 24a to 24d, that is, the current measuring circuits 33a to 33d.
  • the voltage ratio of the alternating voltage V 2 to the AC voltages V 1 In the manner described above, all of the respective partial load sensors 2a ⁇ 2d, at the same time, it is possible to offset nulling.
  • the plurality of partial load sensors 2a to 2d commonly use the first sheet-like elastic body 21 and the second sheet-like elastic body 22 as dielectrics, and the first sheet-like conductive elastic body 23 and the second sheet-like elastic body 23 This is because the three sheet-like conductive elastic bodies 25 are commonly used as electrodes.
  • the AC voltage V 1 (or AC voltage V 2 ) can have a frequency of about 10 KHz and an amplitude of about 5 V, for example.
  • the capacitance values of the plurality of first capacitors Ca 1 to Cd 1 are increased in accordance with the load distribution, and the alternating currents Ia 1 to Id 1 flowing through the first capacitors are increased.
  • the capacitance values of the plurality of second capacitors Ca 2 to Cd 2 hardly change, the alternating currents Ia 2 to Id 2 flowing through the second capacitors Ca 2 to Cd 2 hardly change. Therefore, the difference between the alternating currents Ia 1 to Id 1 and the alternating currents Ia 2 to Id 2 flows as the alternating currents Ia 3 to Id 3 in the terminals 24at to 24dt of the second sheet-like conductive elastic bodies 24a to 24d. Then, in the electric circuit unit 3, the alternating currents Ia 3 to Id 3 are converted into load measurement voltages Va to Vd.
  • load measurement is performed by the difference between the alternating currents Ia 1 to Id 1 flowing through the plurality of first capacitors Ca 1 to Cd 1 and the alternating currents Ia 2 to Id 2 flowing through the plurality of second capacitors Ca 2 to Cd 2. Since the voltages Va to Vd are obtained, the measurement is stable with respect to environmental changes such as noise and temperature, and highly accurate measurement is possible.
  • the electric circuit portion 3 can be disposed below the load sensor portion 2 on the inner bottom 4a of the footwear 4.
  • the terminal 23t of the first sheet-like conductive elastic body 23 in the load sensor unit 2 and the terminals 24at to 24dt of the plurality of second sheet-like conductive elastic bodies 24a to 24d pass through a short vertical wiring.
  • Short wiring contributes to stable and accurate measurement with respect to environmental changes such as noise and temperature.
  • the electric circuit part 3 can be made substantially the same as the shape of the inner bottom 4 a of the footwear 4, like the first sheet-like elastic body 21 of the load sensor part 2.
  • the electric circuit unit 3 can also be arranged at other locations of the footwear 4 by using a slightly longer cable for wiring connection with the load sensor unit 2.
  • the electric circuit unit 3 can also convert the obtained load measurement voltages Va to Vd into digital data load measurement values and send them wirelessly to a load display device 5 as shown in FIG. 2B. It is.
  • the load display device 5 displays, for example, the load measurement values as they are or displays the ratio between the load measurement values.

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

Abstract

La présente invention concerne un appareil de mesure de charge capable de mesurer une charge partielle agissant sur chaque partie de la plante d'un pied et capable d'effectuer des mesures stables et très précises par rapport aux changements environnementaux, tels que le bruit et la température. L'appareil de mesure de charge 1 selon la présente invention comprend une unité de détection de charge 2 qui forme une pluralité de condensateurs Ca1-Cd1, Ca2-Cd2 présentant un premier corps élastique en forme de feuille 21 pourvu de manière cyclique d'une pluralité de cavités et un second corps plat élastique en forme de feuille 22 en tant que corps diélectriques, et un premier corps conducteur élastique en forme de feuille 23, une pluralité de deuxièmes corps conducteurs élastiques en forme de feuille 24a à 24d et un troisième corps conducteur élastique en forme de feuille 25 en tant qu'électrodes, et un circuit électrique 3 présentant un premier et un second circuit de sortie en CA 31, 32 qui appliquent une tension alternative aux bornes 23t, 25t des premier et troisième corps conducteurs élastiques en forme de feuille 23, 25 et des circuits de mesure de courant 33a à 33d qui mesurent les courants alternatifs allant vers les bornes 24at à 24dt de la pluralité de deuxièmes corps conducteurs élastiques en forme de feuille 24a à 24d pour effectuer une conversion en tensions de mesure de charge.
PCT/JP2016/058365 2015-03-30 2016-03-16 Appareil de mesure de charge WO2016158425A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017509541A JP6522740B2 (ja) 2015-03-30 2016-03-16 荷重計測装置

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JP2015068149 2015-03-30
JP2015-068149 2015-03-30

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WO2016158425A1 true WO2016158425A1 (fr) 2016-10-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6644961B1 (ja) * 2019-03-28 2020-02-12 住友理工株式会社 静電型トランスデューサおよびその製造方法
JPWO2020137036A1 (ja) * 2018-12-24 2021-11-11 住友理工株式会社 静電型トランスデューサおよびその製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04241802A (ja) * 1991-01-16 1992-08-28 Hitachi Metals Ltd スキーブーツ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04241802A (ja) * 1991-01-16 1992-08-28 Hitachi Metals Ltd スキーブーツ

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2020137036A1 (ja) * 2018-12-24 2021-11-11 住友理工株式会社 静電型トランスデューサおよびその製造方法
JP7364596B2 (ja) 2018-12-24 2023-10-18 住友理工株式会社 静電型トランスデューサ
JP6644961B1 (ja) * 2019-03-28 2020-02-12 住友理工株式会社 静電型トランスデューサおよびその製造方法
WO2020194670A1 (fr) * 2019-03-28 2020-10-01 住友理工株式会社 Transducteur électrostatique et procédé de fabrication correspondant
CN112020635A (zh) * 2019-03-28 2020-12-01 住友理工株式会社 静电型换能器及其制造方法
CN112020635B (zh) * 2019-03-28 2022-06-14 住友理工株式会社 静电型换能器及其制造方法

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