WO2020096295A1

WO2020096295A1 - Thermocouple string having knot

Info

Publication number: WO2020096295A1
Application number: PCT/KR2019/014797
Authority: WO
Inventors: 유의상; 임대영; 노수현; 이정훈; 여준석
Original assignee: 한국생산기술연구원
Priority date: 2018-11-05
Filing date: 2019-11-04
Publication date: 2020-05-14
Also published as: KR102030940B1

Abstract

A thermocouple string having a knot practically and effectively implemented by using a conductive string is disclosed. The thermocouple string comprises: a first plated string plated with a first metallic material; a second plated string separated or arranged to be spaced from the first plated string, and plated with a second metallic material that is different from the first metallic material; and a coating layer made of a third conductive material, in which one end of each of unit sensor parts of the first and second plated strings, or middle parts thereof are coupled in a knot form, and which is coated on a part of the knot form.

Description

Thermocouple thread with knot

An embodiment of the present invention relates to a thermocouple, and more particularly, to a thermocouple thread having a knot practically effectively implemented using an inductor.

Temperature sensors are classified into thermocouples, resistance temperature detectors (RTDs), and thermistors according to the principle. Existing fiber-type temperature sensors are mainly RTD-type temperature sensors, which are configured to measure electrical resistance that changes with temperature based on a certain length of yarn (YARN), or fabric or knit textile based metal wire type thermocouples. It is constructed using the insert method.

At present, as the small electronics industry enters a wearable market, that is, a device that can be worn and worn freely on the body, such as clothes, watches, and glasses, interest in energy generating devices is increasing. Among them, solar cells are in the spotlight as next-generation cells. However, since the solar cell is a structure in which a solar cell layer is laminated using a silicon substrate or a glass substrate as a bottom surface, it is difficult to achieve the flexibility to be secured in order to be applied to the wearable industry.

In addition, the existing fiber type thermocouple material pair is a constantan-iron, constantan-copper metal wire type, and when the existing thermocouple is inserted into a knitted fabric or fabric fiber base, the thermocouple is easily broken and the flexibility is poor. .

Recently, research on thermocouples has been actively conducted with carbon bases such as carbon nanotubes (CNT) and graphene, and in some studies, the whitening coefficient (V / K, voltage generated per temperature change) has been improved. , Because the material of this product is harmful to the human body, it is difficult to apply as a smartware product.

The present invention has been derived to solve the conventional problems as described above, and the object of the present invention is to solve the problem of low flexibility and to solve the problem of low flexibility, and can be applied to products that directly contact the body to sense the temperature. In providing a thermocouple seal.

Another object of the present invention, smart clothing, smart wear, such as smart furniture, such as textile (textile) temperature can be directly applied to all areas that require sensing, and attached to clothing, bags, mattress covers, etc. just before sewing using an embroidery machine It is to provide a knotted thermocouple seal that can be applied as a temperature sensor.

A thermocouple thread having a knot according to an aspect of the present invention for solving the above technical problem includes: a first plating yarn plated with a first metallic material; A second plating yarn separated or spaced apart from the first plating yarn and plated with a second metallic material different from the first metallic material; And a coating layer of a third conductive material that is coupled to one end of the first and second plating yarns in a knot shape and coated on the knot shape portion.

In one embodiment, the first or second metallic material may include silver, copper, gold, aluminum, or a combination thereof.

In one embodiment, the first and second metallic materials are each composed of one or two or more materials, and the main component metal material may be the same material. The first metallic material may be a copper alloy containing less than 50% by weight of silver (Ag), and the second metallic material may be copper made of only copper.

Thermocouple yarn with a knot according to another aspect of the present invention for solving the above technical problem, silver (Ag) plating yarn (yarn); A copper plating thread having one end portion which is combined with one end portion of the silver plating thread to form a knot; And a coating layer formed on the knotted portion and including a conductive material.

In one embodiment, the coating layer may be a silver paste cured at 120 ° C. for 30 minutes to form a joint.

In one embodiment, the conductive material of the coating layer is made of silver, copper, gold, aluminum, or a combination thereof, or nanoribbon, AlN, SiC, or a combination thereof In addition, carbon nanotubes, graphene (graphene), diamond or a combination thereof may be further included.

In the case of using a thermocouple thread having the above-described knot, it is possible to effectively provide a temperature sensor that can be used by applying it to clothing surrounding a human body. In particular, the thermocouple seal of the present embodiment can be used as a silver (Ag) plating and copper (Cu) plating, it is suitable for use as a flexible thermocouple for measuring body temperature, and can be applied to various textile products based on this.

In addition, after bonding one end of a dissimilar material, the voltage generated by the temperature difference between the junction and the end is converted to convert the temperature of the junction, effectively securing sensor reliability and durability even when applied to textile products. There is an advantage to do.

Further, according to the present invention, it is possible to effectively provide clothing capable of measuring real-time body temperature through a thermocouple thread woven on various fabrics used for clothing, wristbands, chair fabrics or matrix covers.

1 is a schematic configuration diagram of a thermocouple thread with a knot according to an embodiment of the present invention.

Figure 2 is a schematic configuration of a thermocouple thread with a knot according to another embodiment of the present invention.

3A to 3C are exemplary views of a textile product using the thermocouple yarn of FIG. 1 or 2.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are exemplified only for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention It can be implemented in various forms and is not limited to the embodiments described herein.

Embodiments according to the concept of the present invention can be applied to various changes and can have various forms, so the embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosure forms, and includes all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

The terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprises” or “haves” are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described herein, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 is a schematic configuration diagram of a thermocouple thread having a knot according to an embodiment of the present invention.

Referring to FIG. 1, the thermocouple thread 100 having a knot according to the present embodiment includes a first plated yarn 10, a second plated yarn 20, and a first plated yarn 10 and a second plated yarn ( A conductive coating layer 40 formed on the knot 30 of 20) is provided.

The first plating yarn 10 and the second plating yarn 20 may be implemented by using at least one conductive material. Although there is no particular limitation on the conductive material, it is preferable to use a material that is not harmful to the human body, for example, if it is intended to be used for body temperature measurement depending on the application. The first plating yarn 10 and the second plating yarn 20 may have a difference in conductivity so that they can operate as a thermocouple for temperature measurement.

For example, the first plating yarn 10 is a silver (Ag) plated yarn, and the second plating yarn 20 may be a copper (Cu) plated yarn, but is not limited thereto. Depending on the implementation, the first plating yarn 10 is a mixture of silver yarn (Ag yarn) and an insulation yarn of 10% or less compared to the weight of the silver yarn, and the second plating yarn 10 is 20 by weight of the silver yarn and the silver yarn. % Or more and 30% or less may be mixed yarns. In the case of a mixed yarn using an insulation yarn in excess of 30%, its conductivity is deteriorated, making it difficult to use as a seal for a thermocouple.

The knot 30 may have a shape in which the first plating yarn 10 and the second plating yarn are buried one or more times, or one surrounding the other one or more times, or each other surrounding the opponent one or more times. The knot 30 is a portion in contact with a body to be measured to measure temperature, such as body temperature.

The conductive coating layer 40 is used to secure reliability of bonding between the first plating yarn 10 and the second plating yarn 20 in the knot 30. The conductive coating layer 40 may be implemented to support electrical bonding and physical bonding between the two

plating yarns

10 and 20.

The manufactured thermocouple thread 100 can measure the temperature based on the voltage (Vo) between the platers between one end of the first plater 10 and one end of the second plater located on the opposite side of the knot 30. have.

2 is a schematic configuration diagram of a thermocouple thread having a knot according to another embodiment of the present invention. 3A to 3C are exemplary views of a textile product using the thermocouple yarn of FIG. 1 or 2.

2 and 3A to 3C, a thermocouple thread having a knot according to this embodiment may be used to measure a user's body temperature by being woven into a garment, wristband, chair cloth, or cloth used in a matrix cover. .

The thermocouple seal is a first plating yarn 10 plated with a first metallic material, a second plating yarn separated from or spaced from the first plating yarn 10 and plated with a second metallic material different from the first metallic material ( 20), and one end of the unit temperature sensor portion of the first and second plating yarns are combined in a knot shape, and a coating layer 40 of a third conductive material coated on the knot shape portion 30 is provided.

The first plating yarn 10 may include a portion 12 that is not partially inserted or coated in a structure in which the conductive yarn is inserted or arranged in a coating form. Similarly, the second plating yarn 20 may include a portion 22 that is partially inserted or uncoated in a structure in which conductive yarns are inserted or arranged in a coating form. In this case, two temperature sensors or a plurality of unit temperature sensors can be easily formed on a single fabric or a single garment by using the first plating yarn 10 and the second plating yarn 20.

The first or second metallic material may include silver, copper, gold, aluminum, or a combination thereof.

The first and second metallic materials are each composed of one or two or more materials, and the main component metal material may be the same material. The first metallic material may be a copper alloy containing less than 50% by weight of silver (Ag), and the second metallic material may be copper made of only copper.

The conductive coating layer 30 may be formed by curing the silver paste at a temperature of 120 degrees for 30 minutes to form a joint.

The material of the coating layer is made of silver, copper, gold, aluminum, or a combination thereof, or further includes nanoribbon, AlN, SiC, or a combination thereof, or carbon nano It may further include a tube, graphene, diamond, or a combination thereof.

In addition, a voltage sensor 50 for measuring voltage may be connected at one end of the thermistor-coupling yarn having a knot according to the present embodiment.

In this embodiment, instead of a metal wire having a large foreign body, conductive yarns were used, and to secure the bonding, a knot 30 was formed of two conductive yarns, and then the coating layer 40 was formed of silver paste to finish. In addition, it is possible to cover the

conductive yarns

10 and 20 with the embroidery yarn by using the embroidery machine, thereby reducing the exposure of the conductive yarn portion to design aesthetically.

In other words, the conventional fiber-type thermocouple has a problem in that the thermocouple is easily fragile and inferior in flexibility in the form of directly inserting a metal wire into a knitted fabric or textile base, but in this embodiment, yarn instead of a metal wire is used. ), That is, there is an advantage of using an embroidery machine as a method of inserting a conductive yarn into the fiber base. According to this configuration, the conductive yarn is directly embroidered on the textile base and then sewn to produce a finished product such as a smart garment and a smart mattress.

As described above, according to this embodiment, as one or more thermocouple yarns woven on various fabrics (100a, 100b, 100c) or fabric, such as FIGS. 3A to 3C, coupled at one end of a silver (Ag) plating yarn (yarn) It is possible to provide a textile product comprising a copper-plated thread forming a knot and a conductive coating layer disposed in a portion forming the knot. The fabric may have a plain weave, a twill weave, a satin weave, or a combination thereof.

Sample production of a textile product using a thermocouple thread according to this embodiment is as follows.

Three silver-plated yarns (Cy-15, Cy-20, and Cy-21) were paired with copper plating yarns, knotted at one end, and silver paste was applied to the knots, followed by curing in an oven at 120 ° C for 30 minutes. Ordered. The sample was placed in a 25 ° C temperature environment, the finger was placed on the knot, and the voltage was measured with a voltmeter. As the temperature of the human body passed about 32.5 ° C to the knot, voltage generation was confirmed due to a temperature difference of about 7.5 ° C from the surrounding environment.

The above experimental results are shown in Table 1 below.

	샘플 1Sample 1	샘플 2Sample 2	샘플 3Sample 3
도금사 쌍Plater pair	Cy-15 & CuCy-15 & Cu	Cy-20 & CuCy-20 & Cu	Cy-21 & CuCy-21 & Cu
전압(mV)Voltage (mV)	22 ~ 2622-26	35 ~ 5035 to 50	22 ~ 24.322 ~ 24.3

As a result of the experiment, the voltage value was measured as a voltage value in mV, and it can be said that it is applicable to a fiber-type temperature sensor because it generates a voltage similar to a commercially available thermocouple for body temperature measurement.

As described above, according to the present invention, it is possible to provide a thermocouple thread having a knot, which can sense the temperature by lowering the feeling of foreign body and solving a problem of low flexibility and applying it to a product that directly contacts the body. In addition, it can be directly applied to all areas that require temperature sensing of textile bases such as smart clothing, smart wear, and smart furniture, and can be applied as a temperature sensor attached to clothing, bags, mattress covers, etc. just before sewing using an embroidery machine. It can provide a thermocouple thread with a knot.

In the case of using a thermocouple thread having the above-described knot, it is possible to effectively provide a temperature sensor that can be used by applying it to clothing surrounding a human body. Particularly, since the thermocouple yarns of the present embodiment can use silver (Ag) plating and copper (Cu) plating, it is suitable for use as a thermocouple for flexible body temperature measurement, and is applied to various textile products based on this. It is possible. In addition, after bonding one end of a dissimilar material, the voltage generated by the temperature difference between the junction and the end is converted to convert the temperature of the junction, effectively securing sensor reliability and durability even when applied to textile products. There is an advantage to do.

The embodiments described so far are merely for explaining preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and it will be understood by those skilled in the art within the technical spirit and claims of the present invention. By this, various changes, modifications, or substitutions will be possible, and it should be understood that such embodiments are within the scope of the present invention.

Claims

A first plating yarn plated with a first metallic material;

A second plating yarn plated with a second metallic material different from the first metallic material; And

A coating layer of a third conductive material having one end of the first and second plating yarns coupled in a knot shape and coated on the knot shape portion;

Thermocouple thread with a knot comprising a.
The method according to claim 1,

The first and second metallic materials are each composed of one or two or more materials, and the main component metal material is a knotted thermocouple thread having the same material.
Silver (Ag) plating yarn;

A copper plating thread having one end portion which is combined with one end portion of the silver plating thread to form a knot; And

A thermocouple thread having a knot formed in a portion formed by the knot and having a coating layer including a conductive material.
The method according to claim 1 or claim 3,

The conductive material of the coating layer is made of silver, copper, gold, aluminum, or a combination thereof, or

Nanoribbons, AlN, SiC, or a combination thereof, or

A knotted thermocouple thread further comprising carbon nanotubes, graphene, diamond, or a combination thereof.