JPS60219501A - Detection gauge for detecting deformation amount of living body - Google Patents

Abstract

PURPOSE:To make it possible to simply measure the large deformation amount of a living body, by detecting the deformation amount of the living body from the elastic base body adhered to the living body and the elastic electronic resistance element extending and contracting in integral relation to said base body. CONSTITUTION:A linear elastic electric resistance element 3 comprising a highly extensible conductive polymer material is adhered to an elastic base body 2 comprising an electric insulating and highly extensible long rectangular thin plate shaped polymer material by an adhesive, so that the base body 2 and the resistance element 3 integrally extend and contract, to constitute a deformation amount detection gauge 1. Then, this detection gauge is adhered to a part to be measured such as the human body so as to allow the longitudinal direction of the base body 2 to match with the extending and contracting direction of said part to be measured. Next, the change in the resistance value of the resistance element 3 extending and contracting along with the extension and contraction of the part to be measured such as the human body is measured to detect the deformation amount of the part to be measured. In this case, the connection of the gauge 1 to an electric resistance meter is performed by grasping the terminal part 5 of the resistance element 3 by the chip 6 connected to a lead wire. Therefore, simple measurement can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION A.Objective of the Invention [Field of Industrial Application] The present invention relates to a gauge for detecting a large amount of deformation of a living body;
In particular, the present invention relates to a biological deformation detection gauge that detects the expansion and contraction movement of the human body, the bending angle of joints, etc. for medical purposes.

[Problems to be solved by conventional technology and invention]

In order to understand the degree of disability and the progress of recovery due to treatment for disorders of the motor function of the human body, especially of the limbs, it is necessary to perform a determination of the affected area along with treatment. .

Conventionally known strain gauges are generally used to measure the amount of deformation of engineering objects. This strain meter is made by attaching an electric resistance element made of metal or other material whose electric resistance changes when the tensile or compressive force is applied to an elastic plate made of synthetic resin or the like. The amount of deformation of the object is detected by measuring the change in electrical resistance of the electrical resistance element that is attached and expands and contracts with the deformation (distortion) of the object. The strain gauges in this building use highly rigid metals or semiconductors as electrical resistance elements, so the amount of variation that can be measured is on the order of 10-4, and large deformations reaching more than 1O-1 of the human body can be detected. It is inappropriate to do so.

Therefore, three-dimensional joint angle meters that measure the bending angle of joints have been proposed for measuring the amount of deformation of the human body.

This angle meter requires a parallel link mechanism to accurately measure the three-dimensional angle of the human body, and calculates the angular displacement of each axis of the three-dimensional rectangular coordinate thread by decomposing the bending angle of the joint into the angular displacement of each axis of the three-dimensional rectangular coordinate thread.
1 electrically, the structure is crude and expensive, and the measuring part has a large lateral protrusion, which tends to interfere with human body movement and can be used during daily activities over a long period of time. The fil measurement is difficult and difficult, and has the disadvantage that it can only measure the bending angle of a relatively large portion of the joints of the limbs.

The present invention has been made in view of the above-mentioned drawbacks of the conventional art.Compared to engineering objects, it is possible to easily and quickly detect relatively large amounts of deformation and bending angles of living organisms, and it has a simple structure and can be easily and quickly detected. An object of the present invention is to provide an inexpensive biological deformation detection gauge that has almost no protruding parts and can easily measure the amount of human body deformation during long-term daily activities without interfering with the movement of the human body.

[Means for solving the problems] In order to achieve the above object, the biological deformation detection gauge according to the present invention uses an electrically insulating and stretchable diurnal material that is attached to the living body. A biological deformation amount detection gauge is constructed from an elastic base made of an elastic substrate and an elastic electronic resistance element made of a highly conductive and highly elastic commercial molecular phase material that stretches together with the base.

〔Example〕

Hereinafter, referring to the attached drawings regarding the embodiments of the present invention, bladder #i will be described.
A.

0 Example 1 FIGS. 1 and 2 show an example of a basic biological deformation amount detection gauge for detecting expansion and contraction in the linear direction.

The first embodiment shown in FIG. ii. An m-shaped elastic electrical resistance element 3 made of a large sieve molecular material is firmly adhered with an adhesive having elasticity (for example, a rubber adhesive), and the elastic base 2 and the elastic electrical resistance element 3 are bonded together. The deformation amount detection gauge l is drawn so as to extend as a whole.

The above-mentioned elastic electrical resistance element 3 is made of, for example, a conductive filler having an appropriate electrical resistance element in a base material of a com-based polymer material (
? IJ can be manufactured by dispersing nickel/chromium base metal imitation powder, conductive carbon, etc. in an appropriate weight. In this embodiment, one end (l') of the electrical resistance element 3 is
It is fixed to the base 2 with a metal rivet 4, and the other end 5 is attached to the base 1.
It extends slightly outward from +2.

In order to measure the deformation t of a human body or the like using this deformation amount detection gauge 1, the base 2 of the gauge 1 is attached so that the longitudinal direction of the base body 2 is along the direction of expansion and contraction of the part to be measured such as the human body. Then, by measuring the resistance change of the electric resistance element 3 that expands and contracts with the expansion and contraction of the part to be measured such as a human body using an electric resistance meter such as a Wheatstone bridge, the deformation area f of the part to be measured is measured.
Detected. The connection of the gauge 1 to the electrical resistance meter is, for example, using a clip 6 connected to a lead wire as shown in FIG.
This is done by adhering to the end portion 5 of the electrical resistance element 3.

Embodiment 2 The second embodiment shown in FIG. A deformable detection gauge 1' is constructed by bonding a resistance element 3'.

The method for measuring the amount of deformation of the part to be measured using the gauge 1' is the same as in the first embodiment. According to this embodiment, the length of the gauge 1' can be shortened to approximately A while the electric resistance element 3' has a sensitivity similar to that of the first embodiment.

Embodiment 3 The third embodiment shown in FIG. 3 detects the amount of deformation of the part to be measured in the judgment direction. A linear electrical resistance element 3 made of the same material as in the embodiment is moved k%t in the bias direction with respect to the base 2 to constitute a deformation detection gauge IN.

The measurement of the amount of deformation using the gauge 17F is performed by attaching the cage 1 to the part to be measured with the longitudinal direction of the substrate 2 perpendicular to the shear deformation direction of the part to be measured. Similarly, connect gauge 1 to a resistance meter and measure the resistance change of electrical resistance element 3.

1 above. Second. Gauge l of the third embodiment.

1' and 1# are applied circumferentially to the chest or limbs of the human body, and the active state of tension or relaxation of the muscles of the chest or limbs can be detected.

FIGS. 4 and 7 show an embodiment of a deformation detecting gauge for measuring the bending angle of a joint of a human body or the like.

Embodiment 4 The fourth embodiment shown in FIG. 4 is a deformation measurement gauge that detects the bending angle (hereinafter referred to as -dimensional bending) in which the base body is bent along a plane including the central axis. The reference numeral 12 is made of an electrically insulating and stretchable polymeric material and has a rod shape with a substantially rectangular cross section, as in the previous embodiment. Also, the elastic electrical resistance elements P1 + Qt + 1 + S1 are formed in a set of 4 straight lines from a conductive and stretchable polymeric material as in the previous embodiment. Then, two electric resistance elements P1 + Qt and two electric resistance elements P1 + Qt and L are provided on the two parallel valley surfaces of the rod-shaped elastic substrate 12.

The deformation −t +

0 action This gauge 11 is located on the inside of the bend when the base body 12 bends along a plane perpendicular to the two opposing parallel surfaces 12a and 12a' (-dimensional bending) as the part to be measured is bent. The electrical resistance elements are shortened and the electrical resistance elements on the outside of the bend are stretched, causing their electrical resistance to change. Therefore, by measuring the electrical resistance 11sigma, the one-dimensional bending angle of the part to be measured can be detected from the relationship between the electrical resistance 11σ and the one-dimensional bending angle, which has been calibrated in advance.

FIG. 5 shows that the electric resistance element Pt + Ql, a +
A wiring diagram is shown in the case of detecting a change in g1° (IL, -dimension). Minimum resistance a element P1 r Ql
+11.1. The connection between S1 is easily made by inserting the metal needle 14 from one electric resistance element to the other electric resistance element through the base, as shown in FIG. is soldered to.

0 Example 5 In the fifth example shown in FIG.
It bends in the direction along all half planes including lI gold. #+1
This is a deformed seam detection gauge that defines a bending angle (hereinafter referred to as two-dimensional bending) of 61, and is made of a rod-shaped elastic base 12' having a circular cross section and made of the same material as the base of the previous embodiment. Two sets of elastic electric resistance elements, each consisting of four strips made of the same material as the elastic electric resistance elements of PI+Qt+RU1+SI and P2+Q2+几2, S2, are arranged side by side in the axial direction and deformed. A quantity detection gauge 11' is constructed.And one set of resistance elements Pt+Qt and U, S.
L elements of the other set P2 . (=h and R2, 82 are arranged as one set of electric resistance elements P 1 r Ql + R1r 81 (disposed substantially opposite to the first diameter line on the father diameter line). Both sets of electrical resistance elements P!+Qx
, Rt , St and P2 lQ2 + "4 + S
Each of m is connected separately to a 2-1 Wheatstone bridge circuit in the same manner as shown in FIG.

0 action In this gauge 11', when the base 1z detached from the part to be measured bends two-dimensionally in accordance with the bending of the part to be measured, the electrical resistance element on the inside of the bend is shortened, and the electric resistance element on the outside of the bend is shortened. Electrical resistance elements are stretched, changing their electrical resistance. Therefore, by measuring these electrical resistance values with two Wheatstone bridges, the two-dimensional bending angle of the part to be measured can be detected from the relationship between the two electrical resistance values and the two-dimensional bending angle, which have been calibrated in advance. Ru.

Embodiment 6 The sixth embodiment shown in FIG. 8 is a deformation detection gauge that simultaneously detects the two-dimensional bending angle and the twist angle of the bend of the center line. Two sets P of elastic electrical resistance elements each having one set of 4 strips i for two-dimensional bending angle detection are mounted on a rod-shaped elastic base 12' having a circular cross section and made of a material similar to the above.
1 + Q, t l R1r J and P2 + QI,
R2,82 and twist! A deformation amount detection gauge 11 is constructed by incorporating a set of elastic electrical resistance elements Ps + Qs and R3+ 83 for detecting 4 degrees. Electrical resistance cable P1 + Ql rRl + 81 for two-dimensional bending angle detection
and Px + Qs ) Rs H82 is similar to the fifth embodiment, P1 + Qt and 1.81 of the electrical resistance elements of one set are embedded and disposed substantially opposite to each other on the -diameter line of the base 12'', and the other set is embedded. The set of electrical resistance elements P2 + Ql and g2.s= is one set of electrical resistance elements P1 + Ql +
The I't+ + Ss are embedded in the axial direction of the base body 12# so as to be substantially opposed to each other on a diameter line perpendicular to the diameter line on which the I't+ + Ss are arranged. Electrical resistance element for twist angle detection"3r
Ql, R3, 83 are each two electrical resistance elements Ps+
Qs and 几3. S3 are embedded spirally in opposite directions, at regular intervals, and at an advancing angle of 45 degrees with respect to the -1 horizontal plane of the base body 12N. The base 12 itself or an insulating material is interposed between the overlapping parts of these electric resistance elements so that they do not come into contact with each other. These three sets of electrical resistance elements Pl
rQt HruI +SI% p, rQ2 +R
4. sz%P s r Qs-31 BM are separately connected to three Wheatstone bridge circuits in the same manner as shown in FIG.

0 action This gauge lIN is attached to the covered foot part 71c base 1
When 2# is bent and twisted as the defined portion is bent and twisted, each set of electrical resistance elements P+ +Qt +
Rt +8ss P2 1Q2 ALz 182 and P
SrQs + Rs and Sg expand or shorten, respectively, changing their electrical resistance values. 9 knees were calibrated in advance by measuring their resistance values with three Wheatstone bridges.
The two-dimensional bending angle and twisting angle of the fixed part of the target 6111 are detected from the relationship between the electrical resistance value, the two-dimensional bending angle 1α, and the twisting angle.

In the first to sixth embodiments, the gauges l, 1', 1#, l I , i
t'.

11" and the electrical resistance covers 7゜7', 7', l3, 13', and l3' are respectively watertightly immersed to create a waterproof structure. This prevents the child from coming into contact with the 4-electroconductor skin and causing measurement errors, and also helps to control movement during swimming and bathing.

]\1 Effects of the Invention As explained in detail above, the present invention has an elastic base made of an electrically insulating and highly stretchable diurnal material that adheres to a living body, and an elastic body that stretches and contracts integrally with the base. By constructing the biological deformation detection gauge with an elastic electrical resistance element made of polymeric paulownia material, which is conductive and highly elastic, strain gauges conventionally used to measure the deformation of engineering objects are unable to measure the deformation of engineering objects. The ability to easily measure large amounts of deformation in living organisms that cannot be measured becomes oJ capability. Compared to conventional joint goniometers that measure all joint flexion angles of the human body, it has a wider range of applications, including measuring not only the flexion angle of joints, but also activity states such as tension and relaxation of muscles in the chest or limbs, and is lightweight and compact. Therefore, it is possible to detect the bending angle of small parts of the human body such as fingers, which cannot be measured with conventional joint angle meters. It is a dog to dedicate.

[Brief explanation of the drawing]

1 and 2 are perspective views showing the first and second embodiments of the present invention, respectively, which detect expansion and contraction in the linear direction, and FIG. 3 is a perspective view showing the third embodiment of the present invention, which detects the amount of deformation in the shear direction. FIG. 4 is a perspective view of a fourth embodiment of the present invention that detects a bending angle along a plane surrounding the central axis; FIG. Total resistance change
6 is a cross-sectional view showing an example of a method of connecting electrical resistance elements to each other, and FIG. 7 is a wiring diagram of the present invention, which has four bending angles along all planes including the central axis. A perspective view showing a fifth embodiment, and FIG. 8 is a perspective view showing a sixth embodiment of the present invention, which simultaneously detects bending angles along all planes including the central axis and twisting angles around the central axis. It is a diagram.

Claims (5)

[Claims] (1) An elastic base made of an electrically insulating and highly stretchable polymer material that adheres to the living body, and an elastic base made of a conductive and stretchable polymer material that expands and contracts together with the base. A biological deformation amount detection gauge whose % characteristic is that it is composed of an electric resistance element. (2) The elastic substrate is formed in a rod shape, and the niJ elastic electrical resistance element is composed of a set of four strips parallel to each other in the sum J direction on the outer surface of the base, and the elements in each two valleys are arranged on the MU substrate. The biological deformation amount detection gauge according to claim 1Jj4, characterized in that the gauges are arranged opposite to each other on the diameter line of the body. (3) The elastic base is formed into a rod shape, and the IP electric resistance element is composed of 2 sets of elements each having four strips arranged in parallel in the axial direction on the outer surface of the base, and the elements of each set are perpendicular to each other. The biological deformation amount detecting gauge according to item 1 of the scope of the watch 6N requirement, wherein two strips are arranged opposite to each other on the diameter line of the base body that intersects with the diameter line of the base body. (4) The elastic base body is formed into a rod shape, and the elastic electrical resistance element is composed of elements 3 and 3 made of silk, each consisting of 4 strips.
The elements of each set are arranged in ILK rows in the axial direction of the base, and the elements of each set are arranged perpendicularly to each other on the IIC diameter line of the non-substrate, with two threads facing each other, and the elements of the other LA are arranged in two rows each. are arranged spirally in opposite directions, at equal intervals, and at an advancing angle of 45 degrees with respect to the base V [mount J]. Biological deformation retrieval gauge as described in section. (5) The biological deformation h1 according to any one of claims 1 to 4, characterized in that an electrically insulating cover that expands and contracts integrally with the gauge is provided on the outer surface of the electrical resistance element. Exploration gauge.