Temperature detecting optical fiber sensing fabric, fabric and garment thereof

Abstract

The application discloses a temperature detection optical fiber sensing fabric and a fabric and clothes thereof, and is based on a fluorescent temperature sensing principle and combines an optical fiber to propose a yarn type fluorescent optical fiber temperature sensor, which can be easily knitted into a fabric to form a temperature detection optical fiber sensing fabric, integrated into a fabric of clothes to prepare intelligent clothes, and multiple point temperature measurement can be realized. The application can realize absolute temperature measurement, has high temperature detection precision, the sensor is perfectly fused with the fabric, non-sensing measurement can be realized, comfort is high, is not affected by sweat, a demodulation system is simple, and integration with clothes is facilitated. The application has a good application prospect in the field of intelligent clothes, can be applied to a human body temperature monitoring clothes, determines temperatures of different parts of a human body, and provides data support for health monitoring.

Description

Technical Field

[0001] This invention relates to the field of intelligent clothing production technology, specifically to a temperature detection fiber optic sensing fabric and its fabric and garment. Background Technology

[0002] The development of flexible electronics and optoelectronic devices has promoted the improvement of smart clothing technology. In particular, research on clothing sensors and detection technologies based on optical measurement principles has provided new solutions for smart clothing with high sensitivity, high signal-to-noise ratio, and high comfort. Temperature is one of the important physical quantities for wearable measurement. Smart clothing with multi-point temperature measurement can map the thermal distribution of the human body, understand the temperature distribution of different parts of the body or clothing, and has important significance for human health monitoring and environmental perception.

[0003] Traditional temperature monitoring clothing employs electrical measurement methods, often utilizing fibrous or planar thermistors or capacitors made of metal or conductive polymer materials for temperature measurement. For example, Chinese patent application CN107467727A proposes an integrated textile-based temperature sensing smart garment, whose temperature sensor is formed by coating conductive materials such as conductive polymers, metals, or mixtures of conductive polymers onto a fiber or yarn substrate. Chinese patent application CN111839472A proposes a flexible temperature sensor for monitoring abnormal body temperature, achieving temperature measurement by inkjet printing a thermosensitive polymer onto a flexible substrate to form an interdigital thermistor. However, clothing temperature sensors using electrical sensing methods suffer from problems such as susceptibility to electromagnetic interference, low signal-to-noise ratio, susceptibility to sweat corrosion and interference, and poor comfort.

[0004] There are reports of wearable human body temperature detection using fiber Bragg gratings (FBGs). Chinese patent application CN101708076A proposes a method for embedding a fiber Bragg grating temperature sensor into clothing, employing a weaving method combining large and small tubes to embed the FBG into the fabric. Chinese patent application CN101263938A proposes a smart garment for human body temperature detection using FBGs and incorporating a demodulation system, employing a wavelength demodulation scheme based on a FP-tunable filter. While FBGs improve the compatibility between the sensor and the fabric, they are currently made of silicon-based optical fiber, which is easily broken and poses certain risks to the human body. FBGs are suitable for measuring changes in temperature; however, in absolute temperature measurements, the initial wavelength drift affects the accuracy of the measurement. Stress-strain changes in the FBG also reduce the accuracy and stability of the measurement. Furthermore, FBGs and their demodulation systems are complex and expensive, limiting their use in smart clothing. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention aims to provide a temperature detection fiber optic sensing fabric and its fabric and clothing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A temperature-sensing fiber optic fabric includes a fluorescent fiber optic temperature sensor and ordinary yarn. The fluorescent fiber optic temperature sensor is in the form of yarn. The fluorescent fiber optic temperature sensor includes a temperature-sensitive fiber and a light-transmitting fiber, with the two ends of the temperature-sensitive fiber connected to the light-transmitting fiber. The fluorescent fiber optic temperature sensor serves as the weft yarn, and the ordinary yarn serves as both the warp and weft yarns. The straight portion of the light-transmitting fiber is interwoven with the warp yarn. The temperature-sensitive fiber is either floated on the fabric surface using a floating long-thread braiding method or positioned between the surface and bottom layers of the fabric using a double-layer fabric structure. The curved portion of the light-transmitting fiber does not participate in the braiding but is floated on the fabric surface and fixed thereto by sewing. Its radius of curvature is greater than its bending loss radius to ensure no bending loss. The portion of the light-transmitting fiber outside the fabric is encapsulated using a thermoplastic tube to form a bundled fiber.

[0008] Furthermore, the temperature-sensitive optical fiber adopts a coating structure, which includes silicon optical fiber or polymer optical fiber. A side-emitting photosensitive structure with sidewall emission and photosensitive capabilities is fabricated on a section of the silicon optical fiber or polymer optical fiber. The outer surface of this section is coated with a transparent polymer or colloidal material doped with organic or inorganic fluorescent particles to form a fluorescent material layer. The outer surface of the fluorescent material layer is coated with a reflective material to form a reflective layer. Furthermore, the side-emitting photosensitive structure is a plurality of grooves formed on the silicon optical fiber or polymer optical fiber.

[0009] Furthermore, the temperature-sensitive optical fiber adopts a sleeve-type structure, which includes a sleeve made of an opaque, thermally conductive material. A section of fluorescent material is filled inside the sleeve, and a section of silicon optical fiber or polymer optical fiber is inserted into each end of the fluorescent material. The end faces of both silicon or polymer optical fibers remain flat and smooth. The sleeve and the inserted silicon or polymer optical fibers are fixed together by heating or adhesive bonding. Even further, the fluorescent material is a transparent polymer material doped with organic or inorganic fluorescent particles.

[0010] The present invention also provides a multi-point temperature sensing fiber optic fabric, including a fabric body, wherein the above-mentioned temperature sensing fiber optic sensing fabric is disposed at a designated position on the fabric body.

[0011] As one approach, in the aforementioned multi-point temperature sensing fiber optic fabric, the temperature sensing fiber optic sensing fabric is attached to the fabric body by sewing it with yarn, and the bundled optical fibers of the temperature sensing fiber optic sensing fabric are sewn onto the fabric body via yarn. As another approach, in the aforementioned multi-point temperature sensing fiber optic fabric, the temperature sensing fiber optic sensing fabric is attached to the fabric body by creating a concealed pocket with a zipper and a concealed groove at a designated location on the fabric body. The temperature sensing fiber optic sensing fabric is placed into the corresponding concealed pocket, its bundled optical fibers are placed into the corresponding concealed groove, and the zipper is closed to secure the temperature sensing fiber optic sensing fabric to the fabric body.

[0012] The present invention also provides a smart garment with multi-point temperature detection, including a garment body, a demodulation unit and a signal processing unit;

[0013] The front and / or back pieces of the garment body include the multi-point temperature sensing fiber optic fabric as described in any one of claims 7-8; each temperature fiber optic sensing fabric piece on the multi-point temperature sensing fiber optic fabric is connected to a demodulation unit through its bundled fiber, and the signal lines of each demodulation unit are collected and input to the signal processing unit through the wire groove inside the garment body.

[0014] Furthermore, in the aforementioned smart clothing with multi-point temperature detection, the demodulation unit transmits signals to the signal processing unit in the form of analog signal transmission or digital signal transmission.

[0015] When using analog signal transmission, the demodulation unit includes a photodetector, a photoelectric conversion circuit, an excitation light source, and an excitation light source control circuit. The excitation light source is connected to the excitation light source control circuit, and the photodetector is connected to the photoelectric conversion circuit. The control lines of the excitation light source control circuit and the output signal lines of the photoelectric conversion circuit of each demodulation unit are respectively connected to the signal processing unit.

[0016] When digital signal transmission is used, the demodulation module includes an excitation light source, an excitation light source control circuit, a photodetector, a photoelectric conversion circuit, and a microcontroller or microprocessor for demodulation. The excitation light source is connected to the excitation light source control circuit, the photodetector is connected to the photoelectric conversion circuit, and the control line of the excitation light source control circuit and the output signal line of the photoelectric conversion circuit are both connected to the microcontroller or microprocessor. The microcontroller or microprocessor of each demodulation unit is connected to the signal processing unit. Each demodulation unit can independently calculate the fluorescence lifetime and demodulate the temperature of the corresponding temperature fiber optic sensing fabric through its own microcontroller or microprocessor, and then transmit the obtained temperature information to the signal processing unit.

[0017] The beneficial effects of this invention are as follows:

[0018] (1) The fluorescent fiber optic temperature sensor based on the fluorescent temperature sensing principle can achieve high-precision absolute temperature measurement. It uses fluorescence lifetime to measure temperature, avoiding light source fluctuations and external force influences. Its accuracy and stability are higher than those of conventional fiber optic temperature sensors.

[0019] (2) The fluorescent fiber optic sensor is made into a yarn shape, which can be woven into the fabric to enhance the wearing comfort. Compared with the traditional fluorescent fiber optic probe, the present invention adopts a double-end excitation and double-end fluorescence acquisition method for the fluorescent material. That is, two optical fibers are placed at both ends of the fluorescent material to excite the fluorescent material and acquire the fluorescence from both ends. This method can effectively enhance the fluorescence intensity, improve the signal-to-noise ratio, and expand the temperature measurement area.

[0020] (3) The multi-point temperature detection smart garment proposed in this invention is equipped with an independent demodulation unit for each temperature sensing fabric and adopts a distributed acquisition method to avoid the problems of excessive circuit size, difficulty in integration with clothing, and impact on comfort caused by centralized acquisition method. The fluorescent fiber optic temperature sensor can be washed with the garment, and the demodulation unit and signal processing unit integrated in the garment can be removed from the garment, improving the practicality of the garment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the temperature detection fiber optic sensing fabric in Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the coated temperature-sensitive optical fiber in Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the temperature-sensitive optical fiber with a coated structure in Embodiment 1 of the present invention;

[0024] Figure 4 This is a schematic diagram of the sleeve-type temperature-sensitive optical fiber in Embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of one embodiment of the multi-point temperature detection optical fiber fabric in Embodiment 2 of the present invention;

[0026] Figure 6 This is a schematic diagram of another implementation of the multi-point temperature detection optical fiber fabric in Embodiment 2 of the present invention;

[0027] Figure 7 This is a schematic diagram of the temperature-detecting smart garment in Embodiment 3 of the present invention. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0029] Example 1

[0030] This embodiment provides a fiber optic temperature sensing fabric. The fiber optic temperature sensor, which utilizes the principle of fluorescence thermometry, achieves high-precision absolute temperature measurement, avoids the influence of light source fluctuations and external forces, and has higher accuracy and stability than commonly used fiber Bragg grating temperature sensors.

[0031] like Figure 1 As shown, the temperature-sensing fiber optic fabric 100 includes a fluorescent fiber optic temperature sensor and ordinary yarn. The fluorescent fiber optic temperature sensor is in the form of yarn. The fluorescent fiber optic temperature sensor includes a temperature-sensitive fiber 101 and a light-transmitting fiber 102, with the two ends of the temperature-sensitive fiber 101 connected to the light-transmitting fiber 102. The fluorescent fiber optic temperature sensor serves as the weft yarn, and the ordinary yarn serves as both the warp and weft yarns. The straight portion of the light-transmitting fiber 102 is interwoven with the warp yarns and stably fixed in the fabric. The temperature-sensitive fiber 101 floats on the fabric surface using a floating long-thread braiding method or is positioned between the surface and bottom layers of the fabric using a double-layer fabric structure. The curved portion 103 of the light-transmitting fiber 102 does not participate in the braiding but floats on the fabric surface and is fixed thereto by sewing. Its radius of curvature is greater than its bending loss radius to ensure no bending loss. The portion of the light-transmitting fiber outside the fabric is encapsulated using a thermoplastic tube to form a bundled fiber 104.

[0032] Specifically, in this embodiment, the temperature-sensitive optical fiber adopts a coated structure or a sleeve structure;

[0033] like Figure 2-3 As shown, the temperature-sensitive optical fiber with a coated structure includes a silicon optical fiber or a polymer optical fiber 301. A side-emitting photosensitive structure with side-wall emission and photosensitive capabilities is fabricated on the outer wall of a section 302 of the silicon optical fiber or polymer optical fiber 301. The outer surface of this section 302 is coated with a transparent polymer or colloidal material doped with organic or inorganic fluorescent particles to form a fluorescent material layer 303. The outer surface of the fluorescent material layer 303 is coated with a reflective material to form a reflective layer 304. This reflective layer also has good thermal conductivity.

[0034] Specifically, in this embodiment, the side-emitting photosensitive structure is a plurality of grooves formed on a silicon optical fiber or a polymer optical fiber by means of laser grooving, chemical etching, or mechanical cutting.

[0035] In a coated temperature-sensitive optical fiber, the excitation light transmitted within the silicon or polymer optical fiber passes through a side-emitting photosensitive structure and then illuminates the fluorescent material layer from the side of the silicon or polymer optical fiber, exciting fluorescence. Part of the fluorescence directly enters the silicon or polymer optical fiber, while the other part is reflected back by the reflective layer and also enters the silicon or polymer optical fiber. The fluorescence returning to the silicon or polymer optical fiber is transmitted along both ends to the light transmission optical fiber, which then transmits the fluorescence outward through the bundled optical fiber.

[0036] Temperature-sensitive optical fibers with a sheath structure, such as Figure 4 As shown, it includes a sleeve 201 (flexible tube or thermoplastic tube) made of an opaque, thermally conductive material. The sleeve 201 is filled with a section of fluorescent material 202. A section of silicon optical fiber or polymer optical fiber 203 is inserted into each end of the fluorescent material 202. The end faces of the two silicon optical fibers or polymer optical fibers 203 are kept flat and smooth by grinding. The sleeve 201 and the inserted silicon optical fiber or polymer optical fiber 203 are fixed by heating or adhesive. The fluorescent material 202 can be a transparent polymer material doped with organic or inorganic fluorescent particles.

[0037] In a sleeve-type temperature-sensitive optical fiber, excitation light enters from the silicon or polymer optical fibers at both ends of the fluorescent material, irradiates the fluorescent material, and the excited fluorescence is transmitted along the silicon or polymer optical fibers at both ends of the fluorescent material to the light transmission optical fiber. The light transmission optical fiber then transmits the fluorescence signal outward through its bundled optical fiber.

[0038] Example 2

[0039] This embodiment provides a multi-point temperature sensing fiber optic fabric, such as... Figure 5 and Figure 6 As shown, it includes a fabric body 400, and a temperature detection fiber optic sensing fabric 100 as described in Example 1 is disposed at a designated position on the fabric body.

[0040] Specifically, in this embodiment, one way the temperature-sensing fiber optic sensing fabric 100 is positioned on the fabric body 400 is by sewing the temperature-sensing fiber optic sensing fabric to the fabric body using yarn. The bundled optical fibers of the temperature-sensing fiber optic sensing fabric are sewn to the fabric body using yarn, such as... Figure 5 As shown; another configuration involves creating a concealed pocket 401 with a zipper and a concealed groove 402 at a designated position on the fabric body 400. The temperature-sensing fiber optic sensing fabric 100 is placed into the corresponding concealed pocket 401, and its bundled fiber optic cable 104 is placed into the corresponding concealed groove 402. The zipper is then closed to secure the temperature-sensing fiber optic sensing fabric to the fabric body. Figure 6 As shown, this setup makes the temperature sensing fiber optic fabric removable.

[0041] Example 3

[0042] This embodiment provides a smart garment with multi-point temperature detection, such as... Figure 7 As shown, the device includes a garment body 500, a demodulation unit 501, and a signal processing unit 502. This multi-point temperature detection smart garment can measure the temperature of multiple points on the human body or inside the garment, and construct a temperature distribution map.

[0043] The front and / or back pieces of the garment body include the multi-point temperature detection fiber optic fabric 400 described in Example 2; each temperature fiber optic sensing fabric 100 on the multi-point temperature detection fiber optic fabric 400 is connected to a demodulation unit 501 through its bundled fiber 104, and each demodulation unit 501 is located at the hem of the garment body 500 or at the sewing line between the front and back pieces on both sides of the garment body 500; the signal lines 503 of each demodulation unit 501 are collected and input to the signal processing unit 502 through the wire groove inside the garment body 500.

[0044] Specifically, in this embodiment, the position on the garment body 500 where the demodulation unit 501 is placed has a sandwich structure 504, and each demodulation unit 501 is placed inside the sandwich structure 504.

[0045] Specifically, in this embodiment, the signal processing unit 502 is located in a pocket at the hem of the garment body 500. After obtaining the temperature detected by the temperature fiber optic sensing fabric through each demodulation unit, the signal processing unit can generate a temperature distribution map, and the relevant data can be further transmitted wirelessly.

[0046] Furthermore, in this embodiment, the form in which the demodulation unit transmits signals to the signal processing unit can be either analog signal transmission or digital signal transmission.

[0047] When using analog signal transmission, the demodulation unit includes a photodetector, a photoelectric conversion circuit, an excitation light source, and an excitation light source control circuit. The photodetector is connected to the photoelectric conversion circuit, and the excitation light source is connected to the excitation light source control circuit. The control lines of the excitation light source control circuit and the output signal lines of the photoelectric conversion circuit of each demodulation unit are respectively connected to the signal processing unit. In this scheme, the signal processing unit centrally controls the excitation light sources of each demodulation unit to generate excitation light, and simultaneous temperature measurement at various points is achieved by collecting the photodetector signals from each demodulation unit.

[0048] When digital signal transmission is used, the demodulation module includes an excitation light source, an excitation light source control circuit, a photodetector, a photoelectric conversion circuit, and a microcontroller or microprocessor for demodulation. The excitation light source is connected to the excitation light source control circuit, the photodetector is connected to the photoelectric conversion circuit, and the control lines of the excitation light source control circuit and the output signal lines of the photoelectric conversion circuit are both connected to the microcontroller or microprocessor. The microcontroller or microprocessor of each demodulation unit is connected to the signal processing unit. Each demodulation unit can independently calculate the fluorescence lifetime and demodulate the temperature of the corresponding temperature-sensing fiber optic fabric using its own microcontroller or microprocessor, and then transmit the obtained temperature information to the signal processing unit. In this scheme, although it is impossible to strictly control the synchronous temperature acquisition at each point, the data communication between the demodulation unit and the signal processing unit is more reliable and stable.

[0049] Example 4

[0050] This embodiment provides a fabrication example of a coated temperature-sensitive optical fiber.

[0051] To balance photosensitivity and flexibility, this embodiment uses a polymer optical fiber with a diameter of 500 micrometers. Multiple grooves are etched side-by-side on the sidewall of a section of the polymer optical fiber using a laser to form a grating structure. The length of each groove is between 1 and 10 mm, and the depth of each groove is no greater than the fiber radius. The internal surface of the grooves is kept smooth, forming a side-emitting photosensitive structure with sidewall light emission and photosensitivity capabilities.

[0052] Fluorescent material powder, such as PMMA, UV adhesive, or epoxy resin, is uniformly doped into a transparent polymer liquid. The portion of a polymer optical fiber with a side-emitting photosensitive structure is repeatedly immersed in this transparent polymer liquid mixed with fluorescent material powder. Curing methods, including heating, UV irradiation, and the addition of a curing agent, solidify the transparent polymer mixed with fluorescent material onto the exterior of the side-emitting photosensitive structure, forming a fluorescent material layer. Then, a metal such as silver is deposited onto the exterior of the fluorescent material layer using methods such as evaporation or sputtering to form a reflective layer with good thermal conductivity. To protect the coated side-emitting photosensitive structure, it can be encapsulated using a thermoplastic tube.

[0053] Example 5

[0054] This embodiment provides a fabrication example of a sleeve-type temperature-sensitive optical fiber.

[0055] Fluorescent powder was uniformly mixed in a precursor solution of a transparent thermoplastic material, and air bubbles were removed from the liquid. Two plastic optical fibers with a diameter of 500 micrometers were selected, and their end faces were ground. One of the plastic optical fibers was inserted into a thermoplastic tube with good thermal conductivity from one end, and the part of the plastic optical fiber inserted into the thermoplastic tube was heated to make it tightly adhered and fixed to the thermoplastic tube.

[0056] The precursor liquid mixed with fluorescent powder is slowly injected into the other end of the thermoplastic tube using a syringe, with the injection length controlled within 5 mm. Then, another plastic optical fiber is inserted into the other end of the thermoplastic tube. The precursor liquid mixed with fluorescent powder in the thermoplastic tube is solidified by heating, and the thermoplastic tube is tightly attached and fixed to the other plastic optical fiber.

[0057] Example 6

[0058] This embodiment provides a preparation example of a temperature-sensing fiber optic fabric.

[0059] A fluorescent fiber optic temperature sensor, comprising a temperature-sensitive fiber and a light-transmitting fiber, is used as the weft yarn. The warp yarns are ordinary yarns with high thermal conductivity, such as silver-containing yarn, polycarbonate yarn, or nylon yarn with added thermal conductive agents, making it easier for external heat to be conducted to the fluorescent material. A machine-woven fabric structure, free of stretch, is used, which is beneficial for measurement stability. The straight portion of the light-transmitting fiber is interwoven normally with the warp yarns and fixed inside the fabric. The temperature-sensitive fiber containing the fluorescent material is not interwoven with the warp yarns and floats on the fabric surface using a floating long-thread weaving method, allowing it to directly contact the skin. When weaving to the curved portion of the light-transmitting fiber, ordinary yarn is used instead of the light-transmitting fiber as the weft yarn. Other yarns are used to sew the curved portion of the light-transmitting fiber onto the fabric, forming a U-shaped structure. The radius of curvature of this curved portion is much larger than the bending loss radius of the fiber. The portion outside the fabric is bundled into a bundled fiber using thermoplastic tubes and connected to the demodulation unit for transmitting excitation light and fluorescence. The fluorescent material is irradiated by bidirectional excitation light from both ends of the temperature-sensitive optical fiber, and the optical fiber acquires fluorescence bidirectionally, which increases the excitation light radiation of the fluorescent material, improves the fluorescence reception rate, and can obtain a better signal-to-noise ratio.

[0060] The aforementioned temperature-sensing fiber optic fabric is washable because the temperature-sensitive fiber is waterproof. Furthermore, a concealed pocket is designed at a specific location on the fabric, and the temperature-sensing fiber optic fabric is placed inside this pocket. The bundled optical fibers of the temperature-sensing fiber optic fabric can be inserted into a concealed groove in the fabric, allowing the fiber optic sensing fabric to be removed from the garment.

[0061] Example 7

[0062] This embodiment provides a manufacturing example of a temperature-sensing smart garment.

[0063] The garment itself is a tight-fitting sports T-shirt made of elastic fabric. The front panel of the garment contains five temperature-sensing fabric elements: two placed under the armpits on each side, and the remaining three positioned sequentially on the chest. These elements are used to measure the temperature distribution across the chest area. Figure 7As shown, the bundled optical fibers of each temperature sensing fabric are connected to the corresponding demodulation unit via internal grooves within the garment body. These grooves utilize concealed zippers for easy disassembly. A layered structure is designed at the lower front hem of the garment body, forming concealed pockets within the structure. Each pocket houses the demodulation unit, and the signal lines connecting the demodulation unit and the signal processing unit are placed in concealed grooves beneath the layered structure. A pocket with a concealed vertical zipper is located on the lower left side of the garment body, connected internally to the grooves below the layered structure, for housing the signal processing unit. Because the pockets, grooves, and layered structure are all inside the garment, the overall appearance is aesthetically pleasing and unobtrusive. The demodulation and signal processing unit circuits employ flexible packaging and a distributed layout, resulting in small size and light weight for each circuit, providing good comfort.

[0064] For those skilled in the art, various corresponding changes and modifications can be made based on the above technical solutions and concepts, and all such changes and modifications should be included within the protection scope of the claims of this invention.

Claims

1. A temperature-sensing fiber optic fabric, characterized in that, The device includes a fluorescent fiber optic temperature sensor and ordinary yarn. The fluorescent fiber optic temperature sensor is yarn-shaped. It comprises a temperature-sensitive fiber and a light-transmitting fiber, with the two ends of the temperature-sensitive fiber connected to the light-transmitting fiber. The fluorescent fiber optic temperature sensor serves as the weft yarn, and the ordinary yarn serves as both the warp and weft yarns. The straight portion of the light-transmitting fiber is interwoven with the warp yarn. The temperature-sensitive fiber is either floated on the fabric surface using a floating long-thread braiding method or positioned between the surface and bottom layers of the fabric using a double-layer fabric structure. The curved portion of the light-transmitting fiber does not participate in the braiding but is fixed to the fabric surface by sewing. Its radius of curvature is greater than its bending loss radius to ensure no bending loss. The portion of the light-transmitting fiber outside the fabric is encapsulated using a thermoplastic tube to form a bundled fiber. The temperature-sensitive optical fiber adopts a coating structure, which includes silicon optical fiber or polymer optical fiber. A side-emitting photosensitive structure with sidewall emission and photosensitive capabilities is fabricated on a section of the silicon optical fiber or polymer optical fiber. The outer surface of this section is coated with a transparent polymer or colloidal material doped with organic or inorganic fluorescent particles to form a fluorescent material layer. The outer surface of the fluorescent material layer is coated with a reflective material to form a reflective layer. Alternatively, the temperature-sensitive optical fiber adopts a sleeve-type structure, which includes a sleeve made of an opaque thermally conductive material. The sleeve is filled with a section of fluorescent material, and a section of silicon optical fiber or polymer optical fiber is inserted into each end of the fluorescent material. The end faces of the two silicon optical fibers or polymer optical fibers are kept flat and smooth. The sleeve and the inserted silicon optical fiber or polymer optical fiber are fixed by heating or adhesive.

2. The temperature-sensing fiber optic fabric according to claim 1, characterized in that, The side-emitting photosensitive structure is a plurality of grooves formed on a silicon optical fiber or a polymer optical fiber.

3. The temperature-sensing fiber optic fabric according to claim 1, characterized in that, Fluorescent materials are transparent polymer materials doped with organic or inorganic fluorescent particles.

4. A multi-point temperature sensing fiber optic fabric, characterized in that, It includes a fabric body, and a temperature detection fiber optic sensing fabric as described in any one of claims 1-3 is disposed at a designated position on the fabric body.

5. The multi-point temperature detection fiber optic fabric according to claim 4, characterized in that, The temperature sensing fiber optic fabric is installed on the fabric body by sewing the temperature sensing fiber optic fabric onto the fabric body using yarn, and the bundled optical fibers of the temperature sensing fiber optic fabric are sewn onto the fabric body by yarn.

6. The multi-point temperature sensing fiber optic fabric according to claim 4, characterized in that, The temperature-sensing fiber optic sensing fabric is installed on the fabric body by creating a hidden pocket with a zipper and a hidden groove at a designated position on the fabric body. The temperature-sensing fiber optic sensing fabric is placed into the corresponding hidden pocket, and its bundled optical fiber is placed into the corresponding hidden groove. The zipper is then closed to fix the temperature-sensing fiber optic sensing fabric to the fabric body.

7. A smart garment with multi-point temperature detection, characterized in that, Includes the garment itself, demodulation unit, and signal processing unit; The front and / or back pieces of the garment body include the multi-point temperature sensing fiber optic fabric as described in any one of claims 4-6; each temperature fiber optic sensing fabric piece on the multi-point temperature sensing fiber optic fabric is connected to a demodulation unit through its bundled fiber, and the signal lines of each demodulation unit are collected and input to the signal processing unit through the wire groove inside the garment body.

8. The multi-point temperature detection smart garment according to claim 7, characterized in that, The demodulation unit transmits signals to the signal processing unit in either analog or digital form. When using analog signal transmission, the demodulation unit includes a photodetector, a photoelectric conversion circuit, an excitation light source, and an excitation light source control circuit. The excitation light source is connected to the excitation light source control circuit, and the photodetector is connected to the photoelectric conversion circuit. The control lines of the excitation light source control circuit and the output signal lines of the photoelectric conversion circuit of each demodulation unit are respectively connected to the signal processing unit. When digital signal transmission is used, the demodulation module includes an excitation light source, an excitation light source control circuit, a photodetector, a photoelectric conversion circuit, and a microcontroller or microprocessor for demodulation. The excitation light source is connected to the excitation light source control circuit, the photodetector is connected to the photoelectric conversion circuit, and the control line of the excitation light source control circuit and the output signal line of the photoelectric conversion circuit are both connected to the microcontroller or microprocessor. The microcontroller or microprocessor of each demodulation unit is connected to the signal processing unit. Each demodulation unit can independently calculate the fluorescence lifetime and demodulate the temperature of the corresponding temperature fiber optic sensing fabric through its own microcontroller or microprocessor, and then transmit the obtained temperature information to the signal processing unit.

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