JPS62290442A - Body movement detection sensor element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a body motion detection sensor element. More specifically, the present invention relates to a sensor element that is easy to attach to a subject and safely detects body movements without hindering the subject's movements.

[Prior art]

There are cases, mainly in the medical field, where it is necessary to detect body movements that involve small to sometimes large deformations, such as large elongation deformations due to bending of the human body's elbows and knees, and movements of the abdomen due to breathing. However, there are almost no means to detect body movements to date, and they have only been used to detect slight abdominal movements associated with breathing, although there are still some problems. is a differential pressure method in which a belt with an air bank is wrapped around the waist and the air flow is detected using a strain gauge or piezoelectric element.
Impedance measurement methods include attaching electrodes directly to the body and passing a high-frequency weak current. The former has the disadvantage that wearing the belt creates a feeling of pressure on the human body and tends to inhibit body movements associated with breathing.

In addition, in the latter impedance measurement method, electrodes are glued to the body surface and a high-frequency current, albeit a weak current, is passed through the human body, so there is a risk of accidentally overcurrent flowing from electrical equipment, and there is a risk of the influence of heartbeat. However, there is a drawback that accurate body movement detection cannot be performed. Thus, the current situation is that no body movement detection sensor has yet been developed that can safely and easily detect body movements that involve small to sometimes large deformations without hindering body movements. On the other hand, when detecting body movements that involve large displacements of bending parts such as elbows and knees of the human body, there are two methods: using a material whose electrical resistance value decreases when it is stretched and deformed, and a method using a material whose electrical resistance value increases when it is stretched and deformed. It is conceivable to adopt either of the following.

However, until now, there is no known material whose electrical resistance value decreases due to elongation deformation, and therefore, by detecting the decrease in electrical resistance value caused by elongation deformation, the object to be inspected can be inspected. Elements that can detect whether or not the arm is elongated, the amount of elongation, and the frequency of elongation and compression have also not been developed.

Therefore, it is conceivable to detect the elongated deformation using an element that utilizes the property that the electric resistance value increases due to elongated deformation, such as a strain gauge. That is, when a thin metal wire such as Constance, Advance, or Nichrome is stretched, its electrical resistance increases, and this property is used to make strain gauges. However, since the elongation rate of this type of metal wire is extremely small (1% or less), the strain gauge described above can only handle minute deformations of the test object; It cannot be used to detect deformation.

On the other hand, piezoelectric elements and elements using pressure-sensitive conductive rubber are known as elements for detecting deformation of a test object.

However, piezoelectric elements detect mechanical strain deformation as voltage changes, but like strain gauges, they are only suitable for applications that produce minute deformations, and the latter type of pressure-sensitive conductive rubber has a low electrical resistance against compressive deformation. The electrical resistance value does not decrease with respect to elongation deformation.

As mentioned above, conventionally known elements can only be used for minute elongation deformations or compressive deformations.
It is not possible to detect the amount of body movement of a subject that undergoes deformation, particularly a considerable amount of elongation or bending, and therefore there is no body movement detection sensor element that can detect such displacement.

[Problem that the invention seeks to solve]

As mentioned above, by using conventionally known elements, the movement of the subject can be measured from minute deformations to large deformations without hindering the movement of the subject.
It is not possible to realize a body motion detection sensor element that can safely and easily detect body motion.

Therefore, the same applicant as the present applicant has proposed a sheet-like material that can be used to electrically detect everything from minute deformation to considerable deformation behavior.

For example, the first sheet was released on September 27, 1982.
This is a sheet described in Japanese Patent Application No. 59-200577 filed under the name of "Deformed Conductive Polymer Elastomer" in 1999, which is an insulating polymer elastomer with a conductive filler in the form of flakes. This sheet improves the attenuation properties in the stretching direction when stretched in a direction parallel to the filler surface. The second sheet-like material was created in 1985.
A sheet-like material described in Japanese Patent Application No. 60-41024 filed under the name of "Deformed Conductive &g Fabric" on March 4, 2007, which consists of intertwined portions of yarns and A deformable conductive knitted fabric whose electrical resistance value changes when stretched in any direction because the electrical conductivity or electrical insulation between the intertwined parts is formed to satisfy the following conditions. .

■ Among all the intertwined parts in a given area of the W fabric,
If the number of electrically insulated interlaced parts is 11 and the number of electrically conductive interlaced parts is lt, then the ratio! The value of r/1z is 1/9 or more as measured per square inch; The number of interlaced parts that are electrically insulated is ml, and the number of interlaced parts that are electrically conductive is m.
! In this case, the value of the ratio m+/my shall be 1/9 or more as measured value per inch.

If electrodes are attached to any two points on a sheet-like object as described above and the sheet-like object is stretched between the electrodes, the i! Since the electrical resistance between the electrodes decreases, by measuring the absence and extent of the decrease between the two electrodes, it is possible to grasp the presence or absence of elongation of the specimen and the degree of elongation. In addition, since these sheet-like materials, especially the latter deformed conductive knitted fabrics, can undergo a considerable amount of elongation deformation, the elongation-bending behavior of the specimen that undergoes minute to considerable deformation, that is, the presence or absence of elongation-bending, It is possible to detect the amount of extension and bending, the degree of compression associated with extension and bending, and the like.

In the following description, the sheet-like material is referred to as an elongated conductive sheet, and an element in which electrodes are attached to the elongated conductive sheet is referred to as an elongated conductive element.

However, the elongated conductive element configured in this way is
When attached to a subject and used, there are the following problems. That is, when a detection circuit terminal is connected to an electrode of an elongated conductive element attached to a subject, an external force other than body movement is applied to the elongated conductive sheet, which may result in erroneous detection. The present invention solves the problems previously proposed by the applicant of the present invention when attaching an elongated conductive element to a subject to detect body movement, and is easy to attach to the subject. It is an object of the present invention to provide a body movement detection sensor element that can safely and reliably detect body movements ranging from minute displacements to large displacements without obstructing the movements of a subject.

[Means for solving problems]

The object of the present invention is achieved by a body motion detection sensor element comprising an elongated conductive element whose one end is joined to an elongated conductive sheet and whose intermediate portion up to the other end is provided with a freely bendable electrode.

The electrode according to the present invention, in which one end is joined to an elongated conductive sheet and the other end is freely bendable (hereinafter referred to as electrode), is divided into three constituent parts from the viewpoint of function. That is, an electrode end portion located at one end of the electrode and having means electrically connectable to the elongated conductive sheet (hereinafter referred to as the element side electrode end portion), and a detection circuit located at the other end of the electrode. An electrode end portion (hereinafter referred to as the detection side electrode end portion) that has a means for electrically connecting with the terminal of the device, and an electrode portion that is located between the two ends and is freely bendable (hereinafter referred to as a bendable electrode end portion). It consists of an electrode section (abbreviated as "electrode section"), but it is divided in terms of function, and in terms of length, the boundaries between each part may be unclear.

FIG. 1 shows a schematic cross-sectional view of an example of an electrode, which is the first feature of the present invention. In the figure, 1 is an elongated conductive sheet, 2 is an electrode, 3 is an element side electrode end, 4 is a bent electrode part, and 5 is a detection side electrode end. The electrode in this example is made of a flexible material. The bending electrode part 4 is laminated with a polyvinyl chloride-based electrically insulating resin layer e, and the element side electrode end part 3, which is one end of the electrode, is made up of a base film a and a conductive layer printed on it. has a conductive resin layer d and is electrically connected to the stretched conductive sheet 1. The detection side electrode end 5, which is the other end, has a metal plate C which is thermally fused to a conductive layer (the thermal fusion layer is omitted from the figure).

When a body motion detection sensor element consisting of freely bendable electrodes is attached to a subject and body motion is measured, external stress other than body motion (e.g. The present inventors have discovered that the noise (which occurs when the noise is transmitted directly to the elongated conductive sheet through the lead wire) is alleviated by the freely bendable electrode, and the accuracy of body movement detection is significantly improved, leading to the present invention.

Hereinafter, the three constituent parts of the electrode, which is the first feature of the present invention, will be explained in more detail.

The bending electrode part 4 is made of a material or tissue that has the property of freely deforming due to deformation actions such as bending and twisting, and has electrical conductivity.If it has these properties, the shape, size, etc. is not particularly limited.

The structure of the bent electrode part 4 is, for example, a flexible base film such as a polymer insulating film such as polyester or polyimide film or insulating paper made of ordinary inorganic fibers, and a conductive material such as N 1 * Cu + A g 1 carbon. A conductive layer is created by laminating a conductive resin containing these materials by printing, coating, transfer, etching, etc., and then a soft insulating resin layer such as polyvinyl chloride is further laminated on top of the conductive layer. An example of this is a structure that prevents electric shock. In addition, conductive fibers such as polyester, nylon, and other soft fibers coated with conductive substances by means of plating, coating, thermal spraying, etc., conductive carbon fibers, and IQ HJi products in the form of tapes and strings are made of polyvinyl chloride. Examples include those embedded in a soft insulating resin layer such as. moreover,
There is also a structure in which conductive fibers, carbon fibers, metal fibers, etc. are covered around soft fibers such as polyester or nylon to maintain flexibility, and the structure is embedded in an insulating resin layer, but free flexibility and conductivity are possible. It is not limited to this as long as the gender is maintained.

The electrical conductivity here refers to the electrical conductivity that sufficiently transmits the information of the resistance change of the stretched conductive sheet to the detection port B device, and the electrical conductivity between the element side electrode end and the detection side electrode end. The electrical resistance value must be 10 5 Ω or less, preferably 10 3 Ω or less, and more preferably 10 Ω or less. In addition, the free flexibility mentioned here refers to Fig. 2a,
It is evaluated using the evaluation method shown in b. In FIG. 2a, first, one end of the bent electrode section 4 is clamped with a chuck 21, and a load 22 (usually 10 gw) is applied to the other end to keep the electrode section 4 almost stationary in the vertical direction. Next, the electrode part 4 above the load 22 is held between the chucks 23 (the distance between the chucks 21 and
II) Next, open the chuck 21.

At this time, since the bending electrode part 4 is slightly deviated from a perfect vertical direction in most cases, the bending electrode part 4 is bent by its own weight as shown by the solid line in FIG. 2 if it has good bendability. The degree of bending at this time is determined by the tip x, x' of the bent electrode part before and after bending, and the chuck 23.
The angle θ(
(bending angle). The bending angle θ depends on the shape of the bending electrode 4, but unless it is 10° or more, the detection accuracy as a body movement sensor element will be insufficient. θ is 10°
With the above configuration, noise in the detection data due to external stress other than body movement can be almost suppressed. In particular, θ is 45
It is preferably at least 90'', more preferably at least 90''.

Next, the means that can be electrically connected to the elongated conductive sheet of the element-side electrode end 3, which is the second component of the electrode, includes a method of fixing to the elongated conductive sheet (hereinafter abbreviated as the fixing method).
and a removable method (hereinafter abbreviated as the removable method).

The end of the electrode on the element side of the fixing method is made of metal eyelets made of brass or copper, snap buttons, crimping with rivet crimp terminals, adhesion with a conductive resin layer, sewing with metal wire, etc. to extend the electrode to a conductive sheet. The device is attached to the device to realize electrical continuity, but is not limited to this as long as it can be fixed. The conductive resin layer referred to here refers to commonly used epoxy, acrylic, or
Base materials include plastic adhesives such as ester-based adhesives, urethane-based adhesives, latex-based adhesives, or hot-melt polymers such as polyester-based and polyamide-based resins, and are usually in the range of 5 to 50% by volume. This is a layer made of conductive resin mixed with an appropriate amount of conductive filler. The conductive filler as used herein is made of metals such as nickel, copper, iron, aluminum, gold, aluminum, alloys thereof, or conductive carbon, and is in the form of powder or short fibers. In particular, it is preferable because it prevents poor electrical contact with the base material and does not give a feeling of foreign body or discomfort to the human body.

Examples of the detachable device-side electrode end 3 include those that utilize the magnetic force of a magnet, clamping by a spring such as an alligator-clipped knob, air pressure difference, adhesive force of an adhesive, and entanglement of fibers such as a woven fastener. These examples will be explained based on the figures.

FIGS. 3 and 4 show examples using magnets. In the figures, 31° 41 represents the magnet, and 32 and 42 are detachable electrode portions. In both figures, the element-side electrode part of the right electrode of the body motion detection sensor element is connected to the elongated conductive sheet (on state), and the one on the left shows the disconnected state (off state). In addition, in the detached state, a part of the element-side electrode portion remains on the elongated conductive sheet. The type of magnet is not particularly limited as long as it has a magnetic force that does not cause connection failure when the body moves, but soft magnets with magnetic powder dispersed in a polymeric binder known as plastic magnets are recommended. It is preferable because it gives a soft feel to the skin. FIG. 5 shows a case where the end of the element-side electrode is provided with an alligator clip. In the figure, 51 represents an alligator clip, and ■ represents an elongated conductive sheet.

In this case, it is preferable to mold the elongated conductive sheet to be connected with the alligator clip so that a part of it is raised in a convex shape, since the external stress is alleviated in that part as well. FIG. 4 is a schematic diagram of an example in which the end portions of the element-side electrodes are connected by a pressure difference using a rubber suction cup having a pressure difference. In the figure, 61 indicates a suction cup, and 62 indicates a conductive portion built into the suction cup.

This conductive portion is electrically connected to the bent electrode portion 4 via a conductive ring 63 which is adapted to rotate 360@. It is preferable that the scratch terminal part is designed to be able to rotate through 360 degrees on the element side, since in combination with the flexibility of the bending electrode part, a synergistic effect of alleviating external stress can be obtained. In addition, the element side electrode end part which can be rotated in this way is the sixth
It is not limited to the suction cup shown in the figure.

Further, FIG. 7 shows an example of adhesion using a conductive resin layer as a representative example of the fixing method. In the figure, 1 is a stretched conductive sheet, 7
1 indicates a conductive resin layer.

As shown in Figure 7, if the detection side electrode end is exposed to the outside of the body motion detection sensor element, it can be connected to the detection device terminal before being attached to the subject. This is effective when the device must be worn for a short period of time, such as when detecting breathing.

Next, the means which can be connected to the detection circuit device that the detection side electrode end has has a shape that matches the style of the terminal of the detection circuit device. That is, if the terminal of the detection circuit is of a clamping type using an alligator clip or the like, it is preferable that a metal plate such as a copper plate or a brass plate is connected to the above-mentioned bent electrode portion by means such as soldering. In addition, all the methods described in the above-mentioned method for attaching and detaching the element-side electrode portion are applicable. Also, a connector commonly used for connecting electric wires may be used.

Next, the elongated conductive sheet referred to in the present invention is the one described above in [Problems to be Solved by the Invention], and the elongated conductive sheet is partially or partially coated with an insulating reinforcing material having extensibility. It may be used by completely burying it or by adhering it. If a stretched conductive sheet reinforced in this manner is used as a sensor element, a decrease in conductive performance and physical damage after repeated stretching can be significantly improved.

Further, the electrodes for detecting the electrical resistance value of the stretched conductive sheet may be provided at intervals, and the interval, position, number, shape, etc. of the electrodes may be appropriately selected depending on the purpose and method of use.

Next, the body motion detection sensor element according to the present invention must include, in addition to the elongated conductive element made of an elongated conductive sheet and an electrode, a fixing means for fixing the elongated conductive element to the subject.
. In addition, in order to set the range in which the resistance value of the elongated conductive element changes, it may have an action elongation setting mechanism, which was filed by the present applicant under the name of "action elongation setting type elongated conductive element." . Alternatively, it may be an elongated conductive element in which at least one side is formed in an insulating state, which was filed by the present applicant under the name of "extended conductive element insulated from specimen."

An example of the body motion detection sensor element of the present invention having these functions is shown in FIGS. 8 to 11.

In the figure, 1 represents an elongated conductive sheet, and 2 represents an electrode. In addition, 81 is an action elongation setting sheet whose length is adjusted so that it can be applied to the body by setting the initial resistance value of the elongated conductive sheet to a predetermined value. It is attached with adhesive to make it look like this. Further, 82 is a surgical tape, and 83 is a release film, and the elongated conductive element is fixed to the subject by peeling off the release film from the surgical tape. Further, 84 and 85 are insulating sheets for preventing electrical leakage to the human body.

The insulating sheet 84 consists of two sheets adhered to two parts of the elongated conductive element, and the overlapping part of the sheets is
In order to reduce the coefficient of friction so as not to inhibit body movement, the surfaces are smoothed or coated with a lubricant. Note that 86 represents an elongated conductive element. Further, the insulating sheet 85 is a stretchable insulating elastomer film, and is located on the surface of the elongated conductive sheet that comes into contact with the subject. Incidentally, these insulating sheets 84.
85 needs to be made slightly larger than the elongated conductive sheet as shown in FIG. 8b) in order to prevent the cut surface of the elongated conductive sheet from touching the subject.

As shown in Fig. 11, the electrode also has the function of setting the action elongation, or as shown in Figs. 9 and 10, the electrode and the action elongation setting sheet are glued together. In this case, it is preferable because the connection with the body movement detection circuit terminal can be easily performed after being attached to the subject.

Hereinafter, a more detailed explanation will be given using examples, but it is clear that the body movement detection sensor element of the present invention is not limited to those examples or those shown in the previous drawings.

〔Example〕

Taffeta (warp 50d/24f, weft 75d/36f) made of polyester fiber yarn manufactured by Asahi Kasei Kogyo ■ was subjected to weight loss processing (weight loss rate 20%) in an aqueous sodium hydroxide solution (80g/1) at 100°C (weight loss rate 20%), and the weight loss was reduced to 5nCI! z: Sensitized in a bath with hydrochloric acid in a weight ratio of 3:10, washed with water and dehydrated,
PdCA! z; Hydrochloric acid is activated in a bath with a weight ratio of 1:15, and after washing and dehydration, N1Cj'z ・6H20, NaHPOt
z Sodium citrate, NH, CI, aqueous ammonia are l
A Ni-plated ester taffeta was produced by treatment at 90° C. for 2 minutes in a bath with a weight ratio of: 1:3:2:2. This is 10c
A double cylindrical laminar flow generator (the inner cylinder rotates at high speed, the outer cylinder has an inner diameter of 25 cm)
0, outer diameter of an inner cylinder (10Ω) together with water, and treated at an inner cylinder rotation speed of 200 rpm+ for 300 minutes to obtain an elongated conductive fabric.

Next, commercially available urethane elastomer resin (solvent DMF,
After coating release paper with 90um and 300um gauges (solid content 10wt/%), 100℃X3+++i
n When dried and half-dried, both sides of this sheet-like stretched conductive sheet were heated at a pressure of 41 qr/c4 to 110 ml.
It was thermally adhesively transferred at 100° C. and dried for 30 minutes at 100° C. to obtain an elongated conductive sheet.

Next, the stretched conductive sheet was cut in the bias direction to 1 cm width x 5 cm length, and 1 cffl length from both ends was sandwiched between copper plates.
When the electrical resistance value was measured by elongating it by 20%, it was found that between the copper plates at both ends it changed from 4.5 x 106 Ω to 6 Ω before and after elongation.
The resistance value changed to 0Ω.

Next, a commercially available flexible printed circuit (polyester base film 35 μm thick, Ag based & electric layer, surface heat-sealed polymer lamination) was cut into ICl11 width x 6 cIl length, and a 40 μm copper plate was attached to the heat-sealed side with a length of 1 cI11 from both ends. The electrode material I was produced by heat-sealing. A commercially available plastic magnet was adhered to the same position as the copper plate from the polyester film side of electrode material (■) to produce electrode material (■). On the other hand, on both ends of the stretched conductive sheet, two conductive rubber sheets made of conductive latex and a thinner plastic magne-nod sheet are bonded and dried between them, and the electrode material (2) is applied to these sheets as shown in FIG. We fabricated an elongated conductive element with flexible electrodes that were joined by magnetic force.

Add surgical tape and two sheets of insulating paper to prevent electrical leakage (
A body motion detection sensor element sample N of the present invention shown in FIG.
11 liters were produced.

Next, the plastic magnet is wrapped in conductive fabric (Ni-plated ester cloth) and heat-sealed to the stretched conductive sheet via a hot/melt anisotropic conductive sheet, and the electrode material
A sample magnet 2 (see FIG. 4) of the present invention having a detachable element-side electrode end was prepared in the same manner as sample Nll by attaching the magnet with magnetic force.

In addition, alligator clips were soldered to both ends of a commercially available earphone cord (insulated fibers covered with W4 wire and covered with vinyl chloride resin). On the other hand, as shown in FIG.
Then, attach the alligator clip mentioned above, attach surgical tape and insulation sheet as in sample hole 1,
Sample No. 3 of the present invention (see FIG. 5) was prepared.

Next, a ring shown at 63 in Figure 6 was attached to the constriction of a commercially available electrocardiogram suction cup electrode, one end of the earphone cord was soldered to this ring, and the other end of the earphone cord was soldered to the copper plate. .

On the other hand, surgical tape and an insulating sheet were attached to the elongated conductive sheet in the same manner as in Sample No. 1, and a suction cup-type electrode was attached thereto to prepare sample NQ4 of the present invention shown in FIG. 6.

In addition, the electrode material I and the elongated conductive sheet were replaced with carbon-based 4
Adhere and dry the conductive sheet with electrical latex, and spread it over the ends of the two element-side electrodes to increase the resistance of the stretched conductive sheet to 1 x 106Ω.
Two sheets of paraffin paper for setting the action elongation bonded together with an adhesive, the length of which can be adjusted immediately before setting, are glued together, and surgical tape and an insulating film are attached in the same way as sample Nll. A fixed type body motion detection sensor element sample 11h5 (see FIG. 7) was prepared.

In addition, as shown in Figure 8, between the surgical tape and the release film (polyester-based), the insulating paper used in sample light 1, the stretched conductive sheet, the electrode made of electrode material ■ and conductive latex, and the electrodes used in sample light 5 Sample tlh6 of the present invention was prepared by laminating the working elongation setting sheets in order.

In addition, a stretchable urethane film (thickness 100 μm) was used instead of the insulating paper used in sample 11h6, and an electrode (same electrode as in sample 1h6) and a sheet for setting the action elongation were bonded together. When the setting sheet is torn, the end of the detection side electrode stands up, making connection with the terminal of the detection circuit device easy. Sample 11h7 of the present invention shown in FIG. 9 was prepared.

Furthermore, as shown in FIG. 10, a sample light 8 of the present invention was prepared in which the detection side electrode end of the electrode (the same electrode as the sample light 6) was located on the action elongation setting sheet.

Next, as shown in FIG. 11, electrodes (same electrodes as the sample magnet 6) were set to a predetermined elongation and glued together to create the sample floor 9 of the present invention, which also had the function of setting the working elongation. did.

Next, 51 fl of both ends of the stretched conductive sheet were heat-sealed to one end of a 40 μm thick copper plate, and carbon-based conductive latex was applied across the stretched conductive sheet and the copper plate for 10 minutes at 60°C.
Let dry for a minute. The electrode material made of the flexible printed circuit is connected to the other end of the copper plate by heat fusion, and the twelfth
A body motion detection sensor element sample light 10 of the present invention shown in the figure was produced.

As mentioned above, the element-side electrode end of sample Na1Q uses a soft conductive resin with rubber-like elasticity for electrical connection with the stretched conductive sheet, so cracks may occur due to deformation of the stretched conductive sheet. It was possible to prevent electrical contact failures by flexibly following the curve.

These body motion detection sensor element samples Nll~10 were attached to the abdomen of the subject and connected to a known resistance/voltage conversion circuit, and the waveforms were observed using a storage scope. Accompanying body movements could be detected without interfering with the subject's free movement. Moreover, it is easy and safe to install, and it does not generate noise even if the lead wire of the conversion circuit is accidentally touched, and it does not pick up noise due to external stress other than body movement, achieving highly accurate body movement detection. .

In addition, use a commercially available normal lead wire, and use the rest as a sample! ! 1
A comparative example having a structure similar to that of Example 4 was manufactured and attached to a subject to detect body movements, but when the connected lead wire was touched, noise was introduced and the detection accuracy decreased.

The bending angles of the flexible printed circuit, earphone cord, and commercially available lead wire (as described above) are 70" and 30", respectively.
”, 6°.

〔Effect of the invention〕

Since the body motion detection sensor element according to the present invention is configured as described above, it is possible to detect body motions ranging from minute deformations to large deformations, which cannot be performed using conventionally known sensor elements. This can be done safely, easily, and reliably without interfering with the process. As a result, the sensor element of the present invention can be used as an NMR-CT sensor for detecting the respiration cycle.
) Respiratory cycle sensor for CT such as ICT and pulmonary function testing device [Respiratory management for neonatal apnea, especially premature infants, or recording respiratory waveforms to measure vital capacity, flow velocity (calculated from the slope of the waveform and peripheral It can be used as a medical sensor for various purposes such as testing lung function (testing lung function) and measuring lung function. In addition, it can be used as a pedometer to detect the number of steps taken by attaching it to your elbow or knee, and it also detects the level of the number of times you use various training devices (involving bending and stretching) and the degree of flexion used to strengthen your muscles and improve your shape. It can be used as a sensor for sports training, or as a finger switch that can be attached to the fingers of a glove to directly respond to finger movements. Furthermore, it has a wide range of applications, such as being used in rehabilitation equipment that detects the degree of elongation and flexion for the purpose of restoring the functions of joints and other parts of the human body.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional view of an example of an electrode of a body movement detection sensor element of the present invention. Furthermore, FIGS. 2a and 2b show a method for evaluating the bending properties of the bending electrode part, in which a shows the state in which the bending electrode part is attached, and b shows the bent state and its bending angle. Further, FIGS. 3 to 6 are schematic diagrams of a method for attaching and detaching the end of the electrode on the element side of the body motion detection sensor element of the present invention, and FIG. 7 is a schematic diagram of a fixing method. 8 to 12 show schematic diagrams of examples of body motion detection sensor elements of the present invention. 1... Stretched conductive sheet, 2... Electrode, 3...
- Element side electrode end, 4... Bent electrode part, 5...
・Detection side electrode end. Figure 1 Δ a b Figure 2 Ne 4 Figure 5 Figure 6T! 1 Figure 7

Claims (1)

[Claims] A body motion detection sensor element consisting of an elongated conductive element whose one end is joined to an elongated conductive sheet and whose intermediate portion up to the other end is provided with a freely bendable electrode.