Intelligent vital sign monitoring mattress and system based on optical fiber sensing technology

Abstract

The invention provides an intelligent vital sign monitoring mattress and system based on an optical fiber sensing technology, and belongs to the technical field of intelligent mattresses. The problems that an electronic sensor in an existing intelligent mattress is prone to being interfered by the environment, and finally the sensing distance, the temperature measurement precision and the temperature resolution of a sensing system are low are solved. Comprising a laser light source module, a chaotic laser module, a temperature sensing modulation module, a vibration sensing modulation module, an illumination optical fiber modulation module, a sensing optical fiber module and a processor, by adopting distributed temperature, vibration and illumination optical fibers, vital signs and temperature of a human body can be monitored, and illumination is achieved; the invention is applied to the intelligent mattress.

Description

Technical Field

[0001] The invention provides a mattress and a system for intelligent monitoring of vital signs based on optical fiber sensing technology, belonging to the technical field of intelligent mattresses. Background Art

[0002] Most existing smart mattresses use electronic sensors, but these sensors are easily affected by the environment and are expensive. Smart mattresses based on optical fiber sensing have the advantages of being resistant to electromagnetic interference, low cost, and easy to integrate. They can be used to monitor human vital signs and provide users with a more comfortable and safe sleeping environment. Therefore, it is of great practical significance to develop a smart mattress that integrates vibration, temperature detection, and lighting based on distributed optical fiber sensing.

[0003] At present, most of the products on the market that can detect human vital signs are devices that need to fit the human body, such as smart watches, which are not comfortable enough for sleeping. Some existing mattresses with related functions are relatively simple. Many mattresses have temperature control functions but do not have functions such as lighting and monitoring human vital signs. There are also some mattresses that can only heat but cannot intelligently adjust the temperature or have intelligent lighting functions. In many space attributes, for safety considerations, it is hoped that light and electricity can be separated, so fiber optic lighting is very suitable for application in these fields. At the same time, its heat source can be separated, so the burden on the temperature control system can be reduced. Summary of the invention

[0004] In order to solve the problem that electronic sensors in existing smart mattresses are easily affected by environmental interference, which ultimately leads to low sensing distance, temperature measurement accuracy and temperature resolution of the sensing system, the present invention proposes a vital signs intelligent monitoring mattress and system based on optical fiber sensing technology.

[0005] The technical solution adopted by the present invention is: an intelligent vital sign monitoring system based on optical fiber sensing technology, comprising a laser light source module, a chaotic laser module, a temperature sensing modulation module, a vibration sensing modulation module, an illumination optical fiber modulation module, a sensing optical fiber module and a processor, wherein the output end of the laser light source module is connected to the input end of the chaotic laser module, the output end of the chaotic laser module is connected to a fourth optical fiber coupler, one output of the fourth optical fiber coupler is connected to the input end of the temperature sensing modulation module, another output of the fourth optical fiber coupler is connected to the input end of the vibration sensing modulation module, the output end of the temperature sensing modulation module has three outputs, one of which is connected to the temperature sensing optical fiber of the sensing optical fiber module for sensing temperature, and the other two outputs are respectively connected to two input ends of a first photodetector, and the output end of the first photodetector is connected to an input end of a processor; The output end of the vibration sensing modulation module is connected to an input end of a sixth optical fiber coupler, an output end of the sixth optical fiber coupler is connected to a first vibration sensing optical fiber of the sensing optical fiber module for sensing vibration, another input end of the sixth optical fiber coupler is connected to a second vibration sensing optical fiber, another output end of the sixth optical fiber coupler is connected to an input end of a third tunable attenuator, an output end of the third tunable attenuator is connected to an input end of a second photodetector, and an output end of the second photodetector is connected to another input end of the processor; The output end of the processor is connected to the optical switch in the illumination optical fiber modulation module, and the output end of the illumination optical fiber modulation module is connected to the illumination optical fiber in the sensing optical fiber module.

[0006] Furthermore, the laser light source module includes a temperature control source, a current source, a broadband laser, a first optical isolator and a first optical fiber coupler. The output ends of the temperature control source and the current source are connected to the input end of the broadband laser for regulating the temperature and current of the laser; the output end of the broadband laser is connected to the input end of the first optical isolator to allow the light source to pass in one direction; the output end of the first optical isolator is connected to the input end a of the first optical fiber coupler.

[0007] Furthermore, the chaotic laser module includes a second fiber coupler, a third fiber coupler, a polarization controller and a first tunable attenuator, wherein the b output end of the first fiber coupler is connected to the a input end of the second fiber coupler; the b output end of the second fiber coupler is connected to the a input end of the third fiber coupler; the c output end of the second fiber coupler is connected to the input end of the polarization controller to adjust the polarization state of the light; the b output end of the third fiber coupler is connected to the a input end of the fourth fiber coupler; the c output end of the third fiber coupler is connected to the input end of the first tunable attenuator to control the intensity of the optical signal; the output end of the first tunable attenuator is connected to the input end of the polarization controller to feed back the optical signal, thereby modulating the chaotic laser.

[0008] Furthermore, the temperature sensing modulation module includes an SOA modulator, a first optical fiber amplifier, a fifth optical fiber coupler and a wavelength division multiplexer, wherein the b output end of the fourth optical fiber coupler is connected to the input end of the SOA modulator; the output end of the SOA modulator is connected to the input end of the first optical fiber amplifier to amplify the optical signal; the output end of the first optical fiber amplifier is connected to the a input end of the fifth optical fiber coupler; the b output end of the fifth optical fiber coupler is connected to the a input end of the wavelength division multiplexer to perform wavelength multiplexing processing of the optical signal; the c output end of the fifth optical fiber coupler is connected to the b input end of the first photodetector; and the b output end of the wavelength division multiplexer is connected to the input end of the temperature sensing optical fiber to perform temperature sensing.

[0009] Furthermore, the vibration sensing modulation module includes a second optical fiber amplifier, a first acousto-optic modulator, a first electro-optic modulator, a first optical fiber filter and a second tunable attenuator; the c output end of the fourth optical fiber coupler is connected to the input end of the second optical fiber amplifier to amplify the optical signal; the output end of the second optical fiber amplifier is connected to the input end of the first acousto-optic modulator; the output end of the first acousto-optic modulator is connected to the input end of the first electro-optic modulator; the output end of the first electro-optic modulator is connected to the input end of the first optical fiber filter to filter out invalid optical information; the output end of the first optical fiber filter is connected to the input end of the second tunable attenuator to control the intensity of the optical signal; the output end of the second tunable attenuator is connected to the b input end of the sixth optical fiber coupler.

[0010] Furthermore, the illumination fiber modulation module includes a second optical isolator, a fourth tunable attenuator, a second acousto-optic modulator, a second electro-optic modulator, an optical switch, a second fiber filter, a dispersion compensating fiber, a fiber grating and a third fiber amplifier. The c output end of the first fiber coupler is connected to the input end of the second optical isolator to allow the light source to pass in one direction; the output end of the second optical isolator is connected to the input end of the fourth tunable attenuator to control the intensity of the optical signal; the output end of the fourth tunable attenuator is connected to the input end of the second acousto-optic modulator; the output end of the second acousto-optic modulator is connected to the input end of the second electro-optic modulator; the output end of the second electro-optic modulator is connected to the input end of the optical switch; the output end of the optical switch is connected to the input end of the second fiber filter to filter out invalid optical information; the output end of the second fiber filter is connected to the input end of the dispersion compensating fiber to keep the width and shape of the laser pulse unchanged; the output end of the dispersion compensating fiber is connected to the input end of the fiber grating; the output end of the fiber grating is connected to the input end of the third fiber amplifier; the output end of the third fiber amplifier is connected to the input end of the illumination fiber.

[0011] A mattress for intelligent monitoring of vital signs based on optical fiber sensing technology, comprising a laser modulation device and an optical isolator arranged on the side of the mattress, wherein the laser modulation device is provided with an optical path of an intelligent monitoring system for vital signs based on optical fiber sensing technology, a temperature sensing optical fiber, a first vibration sensing optical fiber and a second vibration sensing optical fiber are arranged on the mattress, and an illumination optical fiber is arranged on the side of the mattress; One end of the temperature sensing optical fiber, the first vibration sensing optical fiber, the second vibration sensing optical fiber and the illumination optical fiber is connected to the laser modulation device, and the other end is connected to the optical isolator.

[0012] Furthermore, the temperature sensing optical fiber, the first vibration sensing optical fiber, and the second vibration sensing optical fiber are arranged in parallel on the mattress.

[0013] Furthermore, the temperature sensing optical fiber, the first vibration sensing optical fiber, and the second vibration sensing optical fiber are arranged in parallel in an S shape on the mattress.

[0014] Furthermore, the lighting optical fiber is arranged around the side of the mattress.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention can monitor the vital signs and temperature of the human body and realize the lighting around the mattress, meeting the multi-functional requirements. At the same time, the present invention also uses optical fiber technology, no longer uses electronic sensors, and also uses optical fiber lighting in terms of lighting. Compared with the vast majority of smart lighting devices currently used indoors at night, its light and electricity are separated. The most important problem of general lighting equipment is that it requires power supply. Also because of the conversion of electric energy, the luminous body will also generate heat relatively.

[0016] Compared with most intelligent electronic mattresses, the present invention uses a distributed optical fiber sensing system to continuously and in real time measure the distributed physical quantities along the sensing optical fiber. In addition, distributed optical fiber sensing has the characteristics of anti-electromagnetic interference, electrical insulation, corrosion resistance, intrinsic safety, high sensitivity, light weight, small size, and embeddability, which can better fit the intelligent mattress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 A schematic diagram of the structure of a laser modulation device provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of optical fiber distribution in a smart mattress provided by an embodiment of the present invention; In the figure: 1: temperature control source, 2: current source, 3: broadband laser, 4: first optical isolator, 5: first fiber coupler, 6: second fiber coupler, 7: third fiber coupler, 8: polarization controller, 9: first tunable attenuator, 10: fourth fiber coupler, 11: SOA modulator, 12: first fiber amplifier, 13: fifth fiber coupler, 14: wavelength division multiplexer, 15: temperature sensing fiber, 16: FPGA, 17: first photodetector, 18: second fiber amplifier, 19: first acousto-optic modulator, 20: first electro-optic modulator, 21: first fiber filter, 22: second tunable attenuator, 23: second photodetector, 2 4: third tunable attenuator, 25: sixth optical fiber coupler, 26: first vibration sensing optical fiber, 27: second vibration sensing optical fiber, 28: second optical isolator, 29: fourth tunable attenuator, 30: second acousto-optic modulator, 31: second electro-optic modulator, 32: optical switch, 33: second optical fiber filter, 34: dispersion compensating optical fiber, 35: optical fiber grating, 36: third optical fiber amplifier, 37: illumination optical fiber, 38: laser light source module, 39: chaotic laser module, 40: temperature sensing modulation module, 41: vibration sensing modulation module, 42: illumination optical fiber modulation module, 43: sensing optical fiber module, 44: laser modulation device, 45: optical isolator. DETAILED DESCRIPTION

[0018] like Figure 1 and 2 As shown, the present invention provides an intelligent monitoring system for vital signs based on optical fiber sensing technology, including a laser light source module 38, a chaotic laser module 39, a temperature sensing modulation module 40, a vibration sensing modulation module 41, an illumination optical fiber modulation module 42, a sensing optical fiber module 43 and an FPGA 16. The output end of the laser light source module 38 is connected to the input end of the chaotic laser module 39. The output end of the chaotic laser module 39 is connected to the temperature sensing modulation module 40 and the vibration sensing modulation module 41 respectively after passing through the fourth optical fiber coupler 10. The output end of the temperature sensing modulation module 40 has three paths, one of which is the temperature sensing optical fiber 15, and the other two paths are respectively connected to the first photodetector 17 and then input into the FPGA 16 to convert the optical signal into an electrical signal. The output end of the vibration sensing modulation module 41 is connected to the b input end of the sixth optical fiber coupler 25. The output ends of the sixth optical fiber coupler 25 are respectively connected to the temperature sensing optical fiber 15 and the other two paths are respectively connected to the first photodetector 17 and then input into the FPGA 16 to convert the optical signal into an electrical signal. The laser light source module 38 includes a temperature control source 1, a current source 2, a broadband laser 3, a first optical isolator 4, and a first optical fiber coupler 5. The output ends of the temperature control source 1 and the current source 2 are connected to the input ends of the broadband laser 3 for regulating the temperature and current of the laser; the output end of the broadband laser 3 is connected to the input end of the first optical isolator 4 to allow the light source to pass in one direction; the output end of the first optical isolator 4 is connected to the input end a of the first optical fiber coupler 5.

[0019] The chaotic laser module 39 includes a second fiber coupler 6, a third fiber coupler 7, a polarization controller 8, and a first tunable attenuator 9. The b output end of the first fiber coupler 5 is connected to the a input end of the second fiber coupler 6; the b output end of the second fiber coupler 6 is connected to the a input end of the third fiber coupler 7; the c output end of the second fiber coupler 6 is connected to the input end of the polarization controller 8 to adjust the polarization state of the light; the b output end of the third fiber coupler 7 is connected to the a input end of the fourth fiber coupler 10; the c output end of the third fiber coupler 7 is connected to the input end of the first tunable attenuator 9 to control the intensity of the optical signal; the output end of the first tunable attenuator 9 is connected to the input end of the polarization controller 8 to feed back the optical signal, thereby modulating the chaotic laser.

[0020] The temperature sensing modulation module 40 includes an SOA modulator 11, a first optical fiber amplifier 12, a fifth optical fiber coupler 13, and a wavelength division multiplexer 14. The b output end of the fourth optical fiber coupler 10 is connected to the input end of the SOA modulator 11; the output end of the SOA modulator 11 is connected to the input end of the first optical fiber amplifier 12 to amplify the optical signal; the output end of the first optical fiber amplifier 12 is connected to the a input end of the fifth optical fiber coupler 13; the b output end of the fifth optical fiber coupler 13 is connected to the a input end of the wavelength division multiplexer 14 to perform wavelength multiplexing processing of the optical signal; the c output end of the fifth optical fiber coupler 13 is connected to the b input end of the first photodetector 17; the b output end of the wavelength division multiplexer 14 is connected to the input end of the temperature sensing optical fiber 15 to sense the temperature.

[0021] The vibration sensing modulation module 41 includes a second optical fiber amplifier 18, a first acousto-optic modulator 19, a first electro-optic modulator 20, a first optical fiber filter 21, and a second tunable attenuator 22. The c output end of the fourth optical fiber coupler 10 is connected to the input end of the second optical fiber amplifier 18 to amplify the optical signal; the output end of the second optical fiber amplifier 18 is connected to the input end of the first acousto-optic modulator 19; the output end of the first acousto-optic modulator 19 is connected to the input end of the first electro-optic modulator 20; the output end of the first electro-optic modulator 20 is connected to the input end of the first optical fiber filter 21 to filter out invalid optical information; the output end of the first optical fiber filter 21 is connected to the input end of the second tunable attenuator 22 to control the intensity of the optical signal; the output end of the second tunable attenuator 22 is connected to the b input end of the sixth optical fiber coupler 25.

[0022] The illumination fiber modulation module 42 includes a second optical isolator 28, a fourth tunable attenuator 29, a second acousto-optic modulator 30, a second electro-optic modulator 31, an optical switch 32, a second fiber filter 33, a dispersion compensation fiber 34, a fiber grating 35, and a third fiber amplifier 36. The output end c of the first fiber coupler 5 is connected to the input end of the second optical isolator 28 to allow the light source to pass in one direction; the output end of the second optical isolator 28 is connected to the input end of the fourth tunable attenuator 29 to control the intensity of the optical signal; the output end of the fourth tunable attenuator 29 is connected to the input end of the second acousto-optic modulator 30; the second acousto-optic modulator The output end of 30 is connected to the input end of the second electro-optic modulator 31; the output end of the second electro-optic modulator 31 is connected to the input end of the optical switch 32; the output end of the optical switch 32 is connected to the input end of the second optical fiber filter 33 to filter out invalid optical information; the output end of the second optical fiber filter 33 is connected to the input end of the dispersion compensation fiber 34 to keep the width and shape of the laser pulse unchanged; the output end of the dispersion compensation fiber 34 is connected to the input end of the fiber Bragg grating 35; the output end of the fiber Bragg grating 35 is connected to the input end of the third optical fiber amplifier 36; the output end of the third optical fiber amplifier 36 is connected to the input end of the illumination fiber 37.

[0023] The sensing fiber optic module 43 includes a temperature sensing fiber 15, a first vibration sensing fiber 26, a second vibration sensing fiber 27 and an illumination fiber 37. The c output end of the sixth fiber optic coupler 25 is connected to the input end of the first vibration sensing fiber optic 26 for vibration sensing; the output end of the second vibration sensing fiber optic 27 is connected to the d input end of the sixth fiber optic coupler 25; the a output end of the sixth fiber optic coupler 25 is connected to the input end of the third tunable attenuator 24 to control the intensity of the optical signal; the output end of the third tunable attenuator 24 is connected to the input end of the second photodetector 23; the output end of the second photodetector 23 is connected to the b input end of the FPGA 16 to convert the optical signal into an electrical signal; the c output end of the FPGA 16 is connected to the input end of the optical switch 32, and the processed signal controls the opening and closing of the optical switch.

[0024] like Figure 2As shown, the above monitoring system is arranged on the mattress to obtain an intelligent mattress, which can realize intelligent monitoring of vital signs, such as monitoring of body temperature and vibration, and can also realize intelligent lighting. The specific arrangement is as follows: the temperature sensing optical fiber 15, the first vibration sensing optical fiber 26, and the second vibration sensing optical fiber 27 are arranged from one end of the top of the mattress to the other end in an S-shaped arrangement to cover as many areas as possible, and the lighting optical fiber 37 is arranged on the side of the mattress, surrounding the mattress, and the other modules in the monitoring system are packaged to obtain a laser modulation device 44, and the laser modulation device 44 is fixed on the side of the mattress. At the same time, an optical isolator 45 is fixed on the side of the mattress. One end of the temperature sensing optical fiber 15, the first vibration sensing optical fiber 26, the second vibration sensing optical fiber 27, and the lighting optical fiber 37 is connected to the laser modulation device 44, and the other end is connected to the optical isolator 45. The laser generated by the laser modulation device 44 enters the temperature sensing optical fiber 15, the first vibration sensing optical fiber 26, the second vibration sensing optical fiber 27, and the lighting optical fiber 37, and the laser passes through the four sensing optical fibers and enters the optical isolator 45 and terminates. The optical isolator 45 can prevent the laser reflection from affecting the generation of the laser signal.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent vital sign monitoring system based on optical fiber sensing technology, characterized in that: The invention comprises a laser light source module (38), a chaotic laser module (39), a temperature sensing modulation module (40), a vibration sensing modulation module (41), an illumination optical fiber modulation module (42), a sensing optical fiber module (43) and a processor, wherein the output end of the laser light source module (38) is connected to the input end of the chaotic laser module (39), the output end of the chaotic laser module (39) is connected to a fourth optical fiber coupler (10), one output of the fourth optical fiber coupler (10) is connected to the input end of the temperature sensing modulation module (40), another output of the fourth optical fiber coupler (10) is connected to the input end of the vibration sensing modulation module (41), the temperature sensing modulation module (40) has three outputs, one of which is connected to the temperature sensing optical fiber (15) of the sensing optical fiber module (43) for sensing temperature, and the other two outputs are respectively connected to two input ends of a first photoelectric detector (17), and the output end of the first photoelectric detector (17) is connected to an input end of the processor; The output end of the vibration sensing modulation module (41) is connected to an input end of a sixth optical fiber coupler (25), an output end of the sixth optical fiber coupler (25) is connected to a first vibration sensing optical fiber (26) of a sensing optical fiber module (43) for sensing vibration, the other input end of the sixth optical fiber coupler (25) is connected to a second vibration sensing optical fiber (27), the other output end of the sixth optical fiber coupler (25) is connected to an input end of a third tunable attenuator (24), the output end of the third tunable attenuator (24) is connected to an input end of a second photodetector (23), and the output end of the second photodetector (23) is connected to another input end of a processor; The output end of the processor is connected to the optical switch (32) in the illumination optical fiber modulation module (42), and the output end of the illumination optical fiber modulation module (42) is connected to the illumination optical fiber (37) in the sensing optical fiber module (43).

2. The intelligent vital sign monitoring system based on optical fiber sensing technology according to claim 1 is characterized in that: The laser light source module (38) comprises a temperature control source (1), a current source (2), a broadband laser (3), a first optical isolator (4) and a first optical fiber coupler (5); the output ends of the temperature control source (1) and the current source (2) are connected to the input end of the broadband laser (3) for regulating the temperature and current of the laser; the output end of the broadband laser (3) is connected to the input end of the first optical isolator (4) for allowing the light source to pass in one direction; and the output end of the first optical isolator (4) is connected to the input end a of the first optical fiber coupler (5).

3. The intelligent vital sign monitoring system based on optical fiber sensing technology according to claim 2 is characterized in that: The chaotic laser module (39) comprises a second optical fiber coupler (6), a third optical fiber coupler (7), a polarization controller (8) and a first tunable attenuator (9); the b output end of the first optical fiber coupler (5) is connected to the a input end of the second optical fiber coupler (6); the b output end of the second optical fiber coupler (6) is connected to the a input end of the third optical fiber coupler (7); the c output end of the second optical fiber coupler (6) is connected to the input end of the polarization controller (8) to adjust the polarization state of light; the b output end of the third optical fiber coupler (7) is connected to the a input end of the fourth optical fiber coupler (10); the c output end of the third optical fiber coupler (7) is connected to the input end of the first tunable attenuator (9) to control the intensity of the optical signal; and the output end of the first tunable attenuator (9) is connected to the input end of the polarization controller (8) to feed back the optical signal, thereby modulating the chaotic laser.

4. The intelligent vital sign monitoring system based on optical fiber sensing technology according to claim 1 is characterized in that: The temperature sensing modulation module (40) comprises an SOA modulator (11), a first optical fiber amplifier (12), a fifth optical fiber coupler (13) and a wavelength division multiplexer (14); the b output end of the fourth optical fiber coupler (10) is connected to the input end of the SOA modulator (11); the output end of the SOA modulator (11) is connected to the input end of the first optical fiber amplifier (12) to amplify the optical signal; the output end of the first optical fiber amplifier (12) is connected to the a input end of the fifth optical fiber coupler (13); the b output end of the fifth optical fiber coupler (13) is connected to the a input end of the wavelength division multiplexer (14) to perform wavelength multiplexing processing of the optical signal; the c output end of the fifth optical fiber coupler (13) is connected to the b input end of the first photodetector (17); and the b output end of the wavelength division multiplexer (14) is connected to the input end of the temperature sensing optical fiber (15) to perform temperature sensing.

5. The intelligent vital sign monitoring system based on optical fiber sensing technology according to claim 1 is characterized in that: The vibration sensing modulation module (41) comprises a second optical fiber amplifier (18), a first acousto-optic modulator (19), a first electro-optic modulator (20), a first optical fiber filter (21) and a second tunable attenuator (22); the c output end of the fourth optical fiber coupler (10) is connected to the input end of the second optical fiber amplifier (18) to amplify the optical signal; the output end of the second optical fiber amplifier (18) is connected to the input end of the first acousto-optic modulator (19); the output end of the first acousto-optic modulator (19) is connected to the input end of the first electro-optic modulator (20); the output end of the first electro-optic modulator (20) is connected to the input end of the first optical fiber filter (21) to filter out invalid optical information; the output end of the first optical fiber filter (21) is connected to the input end of the second tunable attenuator (22) to control the intensity of the optical signal; The output end of the second tunable attenuator (22) is connected to the b input end of the sixth optical fiber coupler (25).

6. The intelligent vital sign monitoring system based on optical fiber sensing technology according to claim 2 is characterized in that: The illumination optical fiber modulation module (42) comprises a second optical isolator (28), a fourth tunable attenuator (29), a second acousto-optic modulator (30), a second electro-optic modulator (31), an optical switch (32), a second optical fiber filter (33), a dispersion compensation optical fiber (34), an optical fiber grating (35) and a third optical fiber amplifier (36); the output end c of the first optical fiber coupler (5) is connected to the input end of the second optical isolator (28) to allow the light source to pass in one direction; the output end of the second optical isolator (28) is connected to the input end of the fourth tunable attenuator (29) to control the intensity of the optical signal; the output end of the fourth tunable attenuator (29) is connected to the input end of the second acousto-optic modulator (30); the second acousto-optic modulator (31) is connected to the input end of the second acousto-optic modulator (30); The output end of the modulator (30) is connected to the input end of the second electro-optic modulator (31); the output end of the second electro-optic modulator (31) is connected to the input end of the optical switch (32); the output end of the optical switch (32) is connected to the input end of the second optical fiber filter (33) to filter out invalid optical information; the output end of the second optical fiber filter (33) is connected to the input end of the dispersion compensation optical fiber (34) to keep the width and shape of the laser pulse unchanged; the output end of the dispersion compensation optical fiber (34) is connected to the input end of the optical fiber Bragg grating (35); the output end of the optical fiber Bragg grating (35) is connected to the input end of the third optical fiber amplifier (36); and the output end of the third optical fiber amplifier (36) is connected to the input end of the illumination optical fiber (37).

7. A mattress for intelligent monitoring of vital signs based on optical fiber sensing technology, characterized in that: The invention comprises a laser modulation device (44) and an optical isolator (45) arranged on the side of a mattress, wherein an optical path of the intelligent vital sign monitoring system based on optical fiber sensing technology as claimed in any one of claims 1 to 6 is arranged in the laser modulation device (44), a temperature sensing optical fiber (15), a first vibration sensing optical fiber (26) and a second vibration sensing optical fiber (27) are arranged on the mattress, and an illumination optical fiber (37) is arranged on the side of the mattress; One end of the temperature sensing optical fiber (15), the first vibration sensing optical fiber (26), the second vibration sensing optical fiber (27), and the illumination optical fiber (37) is connected to a laser modulation device (44), and the other end is connected to an optical isolator (45).

8. The intelligent mattress for monitoring vital signs based on optical fiber sensing technology according to claim 7, characterized in that: The temperature sensing optical fiber (15), the first vibration sensing optical fiber (26), and the second vibration sensing optical fiber (27) are arranged in parallel on the mattress.

9. The intelligent mattress for monitoring vital signs based on optical fiber sensing technology according to claim 8, characterized in that: The temperature sensing optical fiber (15), the first vibration sensing optical fiber (26), and the second vibration sensing optical fiber (27) are arranged in parallel in an S shape on the mattress.

10. The intelligent vital sign monitoring mattress based on optical fiber sensing technology according to claim 7, characterized in that: The lighting optical fiber (37) is arranged around the side of the mattress.

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