CN1985761A - Strain-type flexible respiration transducer for electronic fabric and its application - Google Patents

Abstract

The invention discloses a strain-type flexible breathing sensor for electronic fabrics and its application, which includes sensor sensitive elements in the form of fabrics woven or knitted by elastic conductive fibers and insulating fibers, and the sensor sensitive elements have Leads or connectors for electrical connections. A kind of clothing for monitoring human breathing information using the breathing sensor, the clothing is tights, which includes at least one strain-type flexible breathing sensor for electronic fabrics, wherein the chest part of the clothing is a strain-type flexible breathing sensor in the form of fabric. The sensitive element of the breathing sensor, and the other parts of the clothing are ordinary polyurethane fiber knitted fabrics. The present invention is a sensor in the form of fabric and clothing containing the sensor, so it has the characteristics of bendable, foldable, rubable, washable, etc., and is very suitable for real-time monitoring of the wearer's breathing information in the wearing state. The structure is simple, the cost is low, and the use is very convenient.

Description

A strain-type flexible breathing sensor for electronic textiles and its application

technical field

The invention relates to a flexible breathing sensor, in particular to a conductive fiber-based flexible sensor for detecting physiological information of a human body.

Background technique

Prior to this, many patents have been published on the use of conductive fibers for fabrics or clothing to detect physiological information (such as body temperature, heart rate, electrocardiogram, pulse, respiration, etc.) of the human body. In these patents, conductive fibers have the role of information transmission or power supply. For example, the fabrics or clothes disclosed in Chinese patents 99801099.5 and 00811968.6 granted to Georgia Technology Research Corporation of the United States include conductive fibers for information transmission or power supply. The electrode sensor disclosed in Chinese patent 03804817.5 granted to Royal Philips Electronics Co., Ltd. of the Netherlands includes conductive fibers used as a support for connecting electrodes and a clothing body. Another Chinese patent 01821924.1 issued to Georgia Tech Research Corporation discloses a fabric sensor comprising fabric electrodes woven or knitted with conductive fibers, where the role of the conductive fibers is still information transmission.

However, these patents fail to disclose a conductive fiber with dual functions of information perception and transmission, or fabrics woven or knitted from such conductive fibers, and such fabrics are wearable and washable.

Contents of the invention

The technical problem to be solved by the present invention is to provide a strain-type flexible respiration sensor for electronic fabrics and a kind of clothing for monitoring human respiration information using the respiration sensor.

The innovative point of the present invention is to use the method of weaving or knitting to make the conductive fiber with dual functions of information perception and transmission into a sensor in the form of fabric. This sensor can perceive specific human physiological information (such as breathing).

In order to achieve the above object, the present invention adopts the following technical solutions:

A strain-type flexible breathing sensor for electronic fabrics, which includes sensor sensitive elements in the form of fabrics woven or knitted from elastic conductive fibers and insulating fibers, said sensor sensitive elements have lead wires or joints for electrical connection .

As a preferred technical solution:

This kind of strain-type flexible breathing sensor for electronic fabrics uses carbon nanotube modified polyurethane fiber as the conductive fiber with a resistivity of 10 ⁸ Ω·cm, and ordinary polyurethane fiber as the insulating fiber; It is insulating fiber, part of the weft yarn is conductive fiber, and part is insulating fiber, and there are two insulating fibers between each adjacent conductive fiber; the conductive fibers at the edge of the sensor sensitive element are sequentially connected in series in the form of folded λ sides to form a A continuous conductive fiber.

A kind of clothing for monitoring human breathing information, the clothing is tights, which includes at least one strain-type flexible breathing sensor for electronic fabrics, wherein the chest part of the clothing is a strain-type flexible breathing sensor sensitive element in the form of fabric, Other parts of the clothing are ordinary polyurethane fiber knitted fabrics. In addition, the clothing is also provided with a circuit board including the sensor signal adjustment conversion circuit and signal acquisition, processing, storage, transmission and other functions. The circuit board is fixed together with the power supply in a circuit protection shell, and the circuit protection shell is detachable. .

Owing to adopting above-mentioned technical scheme, the present invention has following advantage and positive effect compared with prior art:

The present invention is a sensor in the form of fabric and clothing containing the sensor, so it has the characteristics of bendable, foldable, rubable, washable, etc., and is very suitable for real-time monitoring of the wearer's breathing information in the wearing state. The structure is simple, the cost is low, and the use is very convenient.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the schematic diagram of sensor sensitive element of the present invention;

Fig. 2 is the woven plain weave structural diagram of the sensor sensitive element of the present invention;

Fig. 3 is a sensor signal adjustment conversion circuit diagram of the present invention;

Fig. 4 is a schematic diagram of the distribution of clothing parts of the present invention;

In the figure: 1. Sensor sensitive element, 11. Conductive fiber, 12. Insulating fiber, 13. Lead wire or connector, 14. Wire, 2. Circuit board, 20. Circuit protection shell, 3. Clothing.

Detailed ways

As shown in Figures 1 and 2, a strain-type flexible breathing sensor for electronic fabrics of the present invention mainly includes the sensor sensitive element 1 of the plain weave structure woven by elastic conductive fibers 11 and insulating fibers 12; 11 selects carbon nanotube modified polyurethane fiber, the resistivity of which is 10 ⁸ Ω·cm, and insulating fiber 12 selects ordinary polyurethane fiber; adopts a woven method, wherein all warp yarns are insulating fibers 12, part of the weft yarn is conductive fiber 11, and part of It is an insulating fiber 12, and there are two insulating fibers 12 between each adjacent conductive fiber 11; the conductive fibers 11 at the edge of the sensor sensitive element 1 are sequentially connected in series in the form of folded λ edges to form a continuous conductive fiber 11 ; Both ends of the continuous conductive fiber 11 have leads or joints 13 for electrical connection.

As shown in FIG. 3 , the present invention is a signal conditioning conversion circuit for a strain-type flexible breathing sensor used in electronic fabrics, which can convert the change of the resistivity of the conductive fiber 11 into a change of the output voltage.

As shown in Figure 4, the present invention is a tights 3 for monitoring human breathing information, the chest of the tights 3 is a sensor sensitive element 1 in the form of fabric, the tights 3 is provided with sensor signal adjustment conversion circuits and signal A circuit board 2 with functions such as acquisition, processing, storage, and emission, the sensor sensitive element 1 and the circuit board 2 are connected by a wire 14, and the circuit board 2 is fixed in a circuit protection shell 20 together with a power supply (figure omitted), and the circuit The protective shell 20 is detachable and is placed on the bottom of the garment.

The working principle of this strain-type flexible breathing sensor for electronic fabrics is roughly as follows: when the sensitive element of the sensor is subjected to tension (such as the movement of the chest caused by breathing) to generate strain (deformation), the resistivity of the conductive fiber or the conductive fiber The resistance value of the formed conductive network will change, and the magnitude of the strain can be obtained by measuring its resistivity or resistance value through the sensor signal adjustment conversion circuit. If the strain varies periodically, its period size can also be obtained. Further, the sensor in the form of fabric is used on clothing to obtain information on the breathing frequency and amplitude of the wearer.

Although the invention has been disclosed in its preferred form, many modifications can be made by those skilled in the art without departing from the spirit and scope of the invention as set forth in the claims.

Claims (5)

1. strain-type flexible respiration transducer that is used for electronic fabric, it is characterized in that, it comprises that described sensor sensing element (1) has lead-in wire or the joint (13) that is used to be electrically connected by the sensor sensing element (1) of the woven or knitting form of fabric of rubber-like conductive fiber (11) and non-conductive fibre (12).

2. the strain-type flexible respiration transducer that is used for electronic fabric according to claim 1 is characterized in that, described conductive fiber (11) is the carbon nano-tube modification polyurethane fiber, and the resistivity size is 10 ⁸Ω cm; Described non-conductive fibre (12) is the conventional polyurethanes fiber.

3. the strain-type flexible respiration transducer that is used for electronic fabric according to claim 1, it is characterized in that, described sensor sensing element (1) is made by woven method, wherein warp thread all is a non-conductive fibre (12), a weft yarn part is conductive fiber (11), a part is non-conductive fibre (12), and has two to thoroughly do away with fibrae marginatae (12) between every adjacent conductive fiber; The conductive fiber of sensor sensing element (1) edge is connected in series to form a successive conductive fiber successively with the form on folding λ limit.

4. medicated clothing that is used for monitoring human breathing information, this medicated clothing (3) is a tights, it is characterized in that, it comprises the strain-type flexible respiration transducer that is used for electronic fabric by at least one, wherein the chest position of medicated clothing (3) is the strain-type flexible respiration transducer sensing element (1) of form of fabric, and other position of medicated clothing (3) is the fiber knitted fabric of conventional polyurethanes.

5. the medicated clothing that is used for monitoring human breathing information according to claim 4; it is characterized in that; also be provided with on the described medicated clothing (3) and comprise that sensor signal regulates the circuit board (2) of functions such as change-over circuit and signals collecting, processing, storage, emission; described circuit board (2) is fixed in the circuit protection shell (20) together with power supply, and circuit protection shell (20) is dismountable.

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