CN114052684A

CN114052684A - Wearable device

Info

Publication number: CN114052684A
Application number: CN202010766434.8A
Authority: CN
Inventors: 刘宇
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2022-02-18

Abstract

The wearable device comprises a wearable part and a detection part arranged on the wearable part. The detection component comprises a light source, a single mode optical fiber and a photoelectric device. The light source is used for emitting first detection light to a target object through the single-mode optical fiber. The photoelectric device is used for receiving second detection light reflected by the target object and passing through the single-mode optical fiber, and generating a first signal for detecting a physiological parameter according to the second detection light. In the wearing equipment of this application embodiment, first detection light is through the target object reflection and behind single mode fiber, and the wavelength of first detection light can change in order to obtain the second detection light, through the analysis to second detection light, can obtain physiological parameter, consequently, the wearing equipment of this application embodiment utilizes optical mode to detect physiological parameter, and anti-electromagnetic interference ability is strong, and is influenced by the environment lessly.

Description

Wearable device

Technical Field

The application relates to the field of mobile terminal equipment, in particular to wearable equipment.

Background

At present, bracelet equipment has all been released by many electronic equipment manufacturers, but bracelet equipment real-time supervision self health data, and bracelet equipment measurement principle is and utilizes baroceptor to experience artery blood vessel and beats, arouses sensor capacitance or resistance to change, handles these change values and then obtains health data such as blood pressure value, and this type of equipment principle all is based on hall effect, and anti-electromagnetic interference ability is weak, and receives environmental impact easily.

Disclosure of Invention

The application embodiment provides a wearable device.

The wearable device comprises a wearable part and a detection part arranged on the wearable part. The detection component comprises a light source, a single mode optical fiber and a photoelectric device. The light source is used for emitting first detection light to a target object through the single-mode optical fiber. The photoelectric device is used for receiving second detection light reflected by the target object and passing through the single-mode optical fiber, and generating a first signal for detecting a physiological parameter according to the second detection light.

In the wearing equipment of this application embodiment, first detection light is through the target object reflection and behind single mode fiber, and the wavelength of first detection light can change in order to obtain the second detection light, through the analysis to second detection light, can obtain physiological parameter, consequently, the wearing equipment of this application embodiment utilizes optical mode to detect physiological parameter, and anti-electromagnetic interference ability is strong, and is influenced by the environment lessly.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a wearable device according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a detecting member according to an embodiment of the present application;

FIG. 3 is a schematic view of another structure of the wearable device according to the embodiment of the present application;

FIG. 4 is a schematic view of another configuration of the wearable device according to the embodiment of the present application;

FIG. 5 is a schematic view of another configuration of the wearable device according to the embodiment of the present application;

fig. 6 is a schematic view of another structure of the wearable device according to the embodiment of the present application.

Description of the main element symbols:

a wearable device 100;

wearing part 110, processor 120, display 130, capacitive touch display screen 131, backlight 132, bluetooth emitter 140, vibrator 150, casing 160, automatic strap adjuster 170, silica gel 180, battery module 190, charging interface 191, detection part 200, light source 210, single-mode fiber 220, optoelectronic component 230, light-blocking tape 231, first optical assembly 240, first diffusing element 241, first collimating element 242, optical switch 250, first optical port 251, second optical port 252, third optical port 253, fourth optical port 254, light guide element 260, second optical assembly 270, second diffusing element 271, second collimating element 272, flexible element 280, air cavity 281.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of brevity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and 2, a wearable device 100 according to an embodiment of the present disclosure includes a wearable part 110 and a detection part 200 disposed on the wearable part 110. The detection component 200 includes a light source 210, a single mode optical fiber 220, and an optoelectronic device 230.

The light source 210 is used to emit a first detection light 201 through a single mode optical fiber 220 toward the target object. The optoelectronic device 230 is configured to receive the second detection light 202 reflected by the target object and passing through the single mode fiber 220, and generate a first signal 203 for detecting the physiological parameter according to the second detection light 202.

In the wearing device 100 of this application embodiment, first detection light 201 is through the target object reflection and behind single mode fiber 220, and the wavelength of first detection light 201 can change in order to obtain second detection light 202, through the analysis to second detection light 202, can obtain physiological parameter, consequently, the wearing device 100 of this application embodiment utilizes the mode of optics to detect physiological parameter, and anti-electromagnetic interference ability is strong, and is influenced by the environment lessly.

The wearable device 100 of the embodiment of the application is used for detecting and displaying the physiological parameters of the user, and can be worn on the wrist and the arm. The wearable device 100 may be in the shape of a ring belt so that the wearable device 100 may fit better on the wrist or arm of the user. In addition, in the embodiment of the present application, the wearable device 100 does not limit a specific wearing position, and the requirement for detecting the physiological parameter may be satisfied.

The wearing part 110 is used to wear the detection part 200 on the user, and it is understood that the wearing part 110 may make the detection part 200 close to the skin of the user. The wearing part 110 may be worn on a wrist or an arm bracelet, but the specific wearing part of the wearing part 110 is not limited in the present application. In some embodiments, the wearing member 110 may also be disposed on different body parts, such as leg loops, neck loops, and the like. The material of the wearing member 110 is not limited, and may be various plastic polymers including PVC.

The detection component 200 is configured to detect a physiological parameter of a user and generate a corresponding signal. The detection component 200 in the embodiment of the present application uses optical components such as the light source 210, the single-mode fiber 220, and the photoelectric device 230, has a strong anti-electromagnetic interference capability, and can operate in an environment with strong electromagnetic radiation, such as an ICU ward. In addition, when the user has sweat on the skin or the air is wet, the detection component 200 is not affected, and the measurement accuracy is good.

The light source 210 is used for emitting detection light, and the light source 210 can be an infrared light source and emits infrared rays with the wavelength of 770-1000 nm. The light source 210 emits a first detection light 201, the first detection light 201 enters the single-mode fiber 220, and the first detection light 201 travels in the single-mode fiber 220 by total reflection. The single-mode fiber 220 is used to reflect the light with a specific wavelength back, i.e. the second detection light 202. The optoelectronic device 230 is configured to receive the second detection light 202 and convert the optical signal into an analog electrical signal according to the wavelength of the second detection light 202. The optoelectronic device 230 integrates an amplifying circuit, an address decoder and an analog-to-digital converter therein, and the analog electrical signal is converted by the amplifying circuit, the address decoder and the analog-to-digital converter to form the first signal 203. The first signal 203 may comprise information of the detected physiological parameter of the user, such as blood pressure value, pulse rate, etc.

Referring to fig. 2, in some embodiments, the single-mode Fiber 220 is formed with a Fiber Bragg Grating (FBG).

In this way, the single mode fiber 220 is reduced in size and light in weight, and the wearable device 100 is greatly reduced in size.

In particular, the bragg grating (FBG) may reflect light of a fixed wavelength, when the ambient pressure (caused by the user's pulse, blood pressure changes) around the bragg grating (FBG) changes, the bragg grating (FBG) length Λ changes, which will cause the reflected light wavelength to change. Based on this, the bragg grating (FBG) will act as an optical wave selective mirror, which is a narrow band filter. The first detection light 201 is incident into the bragg grating (FBG) and only very narrow spectrum light (centered at the bragg wavelength) is reflected within the bragg grating (FBG). The reflected light is the second detection light 202, the second detection light 202 has a specific wavelength determined by the current pulse and blood pressure of the user, and the rest of the wavelengths of light will continue to propagate forward. The reflection wavelength λ and the grating length Λ satisfy the following formula (1):

where λ is the reflection wavelength, n is the refractive index, θ is the propagation angle in the medium relative to normal incidence, and Λ is the grating length.

Illustratively, the single-mode fiber 220 is integrated with 25 × 50 inscribed bragg gratings (FBGs). The light source 210 emits a first detection light 201, the first detection light 201 is emitted into the single-mode fiber 220, the single-mode fiber 220 contacts with the wrist of the user, so that the bragg grating (FBG) can feel the vasodilation and contraction of the blood vessel, and the vasodilation and contraction of the blood vessel cause the bragg grating (FBG) to be under tension or pressure, thereby causing the grating length to change. Further, the reflected wavelength of the second detection light 202 changes, and a health value such as a blood pressure value is inverted.

The bragg grating (FBG) according to the embodiment of the present invention is a short-period fiber grating and can be manufactured by a standing wave method, a laser interference method, a single pulse writing method, a phase mask method, or the like. The manufacturing method of the Bragg grating (FBG) is not limited and can meet the requirement.

Referring to fig. 2, in some embodiments, the detection component 200 includes a first optical assembly 240, the first optical assembly 240 being disposed between the light source 210 and the single mode fiber 220. The first optical component 240 is used to direct the first detected light 201 to the single mode optical fiber 220.

In this way, the first optical assembly 240 may amplify the first detection light 201, and make the first detection light 201 point light source become a parallel surface light source.

Specifically, the first optical assembly 240 has a guiding and magnifying function. First detection light 201 is the pointolite when inciding into first optical assembly 240, becomes parallel area light source behind first optical assembly 240 to the light path area is bigger, has guaranteed that single mode fiber 220 can receive first detection light 201, and guarantees that the light path sine value does not exceed the angle of optic fibre numerical aperture and jets into single mode fiber 220 pore route.

Referring to fig. 3, in some embodiments, the first optical assembly 240 includes a first diffusing element 241 and a first collimating element 242 disposed in sequence along the optical path from the light source 210 to the single-mode optical fiber 220. The first diffusing element 241 is used to diffuse the first detection light 201. The first collimating element 242 is used for collimating the diffused first detection light 201 to the single-mode optical fiber 220.

In this way, the first diffusing element 241 and the first collimating element 242 function to amplify the incident first detection light 201 and then inject the amplified light into the single-mode optical fiber 220.

Specifically, the first detection light 201 enters the first optical assembly 240, and first passes through the first diffusion element 241, and the first detection light 201 is scattered to become a diffusion light path. The first detection light 201 after diffusion penetrates into the first collimating element 242, and the first collimating element 242 changes the diffusion light path into a parallel light path, so that the first detection light 201 is parallel to the hole path of the single-mode fiber 220, the effect of enlarging the incident area of the first detection light 201 can be achieved, and the angle of the expanded sine value of the light path of the first detection light 201, which does not exceed the numerical aperture of the fiber, penetrates into the hole path of the single-mode fiber 220.

Referring to fig. 3, in some embodiments, the wearable device 100 includes an optical switch 250 disposed between the light source 210 and the single mode fiber 220. The optical switch 250 includes a first optical port 251, a second optical port 252, and a third optical port 253, which are oppositely disposed.

The light source 210 is disposed corresponding to the first optical port 251, the single-mode fiber 220 is disposed corresponding to the second optical port 252, the photoelectric device 230 is disposed corresponding to the third optical port 253, the first detection light 201 sequentially passes through the first optical port 251 and the second optical port 252, and the second detection light 202 sequentially passes through the second optical port 252 and the third optical port 253.

Thus, the optical switch 250 ensures the normal transmission of the optical path, and avoids the confusion of the optical path propagation.

In the present embodiment, the optical switch 250 may be a 1 × 3 type optical switch, or the optical switch 250 has one light inlet and three light outlets. The light inlet may be a single port, i.e. light may only enter from one side of the light inlet and exit from the other side. The light outlet may be a dual port, or the light may be injected through one of any of the light outlets and exit through the other light outlet.

The optical switch 250 functions to physically switch or logically operate an optical signal. In the embodiment of the present invention, the type of the optical switch 250 is not limited, and other types of optical switches 250 may be used to meet the demand.

Specifically, the light source 210 may be correspondingly disposed at the right side of the first light port 251. The single-mode fiber 220 may be correspondingly disposed above the second light port 252, and the first optical component 240 is disposed between the single-mode fiber 220 and the second light port 252, that is, the second light port 252, the first diffusing element 241, the first collimating element 242, and the single-mode fiber 220 are sequentially disposed from bottom to top. The optoelectronic device 230 may be correspondingly disposed at the left side of the third optical port 253.

In the present embodiment, the positions of the optical elements around the optical switch 250 are not fixed. For example, in some embodiments, the positions of the light source 210 and the optoelectronic device 230 may be interchanged, with the direction of the opening of the optical switch 250 changed.

Illustratively, a first detection light 201 is emitted from the light source 210 and first enters the optical switch 250 through the first light port 251. The first detection light 201 incident on the optical switch 250 is incident on the first diffusion element 241 through the second light port 252, and the first detection light 201 is scattered and changed into a diffused light path. The diffused first detection light 201 enters the first collimating element 242 again upward, and the first collimating element 242 changes the diffused light path into a parallel light path.

The first detection light 201 is emitted upward into the single mode fiber 220, and the first detection light 201 is reflected by a bragg grating (FBG) to form a second detection light 202. The second detection light 202 enters the optical switch 250 through the first collimating element 242, the first diffusing element 241 and the second optical port 252 along the original optical path. In the process, the fourth optical port 254 of the optical switch 250 is closed, the second detection light 202 passes through the third optical port 253 to enter the optoelectronic device 230 to the left, and the optoelectronic device 230 forms the first signal 203.

Referring to fig. 4, in some embodiments, the optical switch 250 further includes a fourth optical port 254. The light source 210 is used for emitting a third detection light ray 204 passing through the first light port 251 and the fourth light port 254 in sequence. The photoelectric device 230 is configured to receive a fourth detection light 205 reflected by an external object and passing through the fourth light port 254 and the third light port 253 in sequence, and generate a second signal 206 for the wearable apparatus 100 passing through the external object for the number of times according to the fourth detection light 205.

In this way, the fourth optical port 254 allows the optical switch 250 to perform downward optical path adjustment, which ensures that the detecting component 200 can perform the function of detecting the number of steps.

Specifically, the light source 210 emits the third detection light 204. The third detection light 204 enters the optical switch 250 through the first light port 251, and exits the optical switch 250 through the fourth light port 254. The third detection light 204 is essentially infrared with a wavelength of 770-1000 nm, cannot penetrate through a human body when encountering the human body, and is reflected back along a certain angle, namely the fourth detection light 205. The fourth detection light 205 enters the optical switch 250 through the fourth light port 254 and enters the optoelectronic device 230 through the third light port 253. The optoelectronic device 230 generates a second signal 206, and the second signal 206 may comprise information about the detected physiological parameter of the user, such as step count, step frequency, and the like.

In addition, the optoelectronic device 230 may include a light shielding tape 231, and the light shielding tape 231 may function to shield light scattered from the light source 210, the first optical assembly 240, and the second optical assembly 270, so that the optoelectronic device 230 may receive only light transmitted from the third light port 253 of the optical switch 250.

Referring to fig. 4, in some embodiments, the wearable device 100 includes a light guide element 260 disposed corresponding to the fourth light port 254. The light guide element 260 is used for guiding the third detection light ray 204 and the fourth detection light ray 205.

Thus, the light guide element 260 ensures smooth conduction of the detection light.

Specifically, the third detection light ray 204 is emitted to the body of the user through the light guide element 260, cannot penetrate through the body when encountering a human body, and is reflected back along a certain angle, i.e., the fourth detection light ray 205. The light guide element 260 receives the fourth detection light 205, and the fourth detection light 205 is re-emitted into the light switch 250 through the light guide element 260.

Referring to fig. 4, in some embodiments, the detection component 200 includes a second optical assembly 270 disposed between the light guide element 260 and the light switch 250. Along the light path from the light source 210 to the light guide element 260. The second optical assembly 270 comprises a second diffusing element 271 and a second collimating element 272 arranged in sequence. The second diffusion element 271 is used to diffuse the third detection light 204. The second collimating element 272 is configured to collimate the diffused third detecting light 204 to the light guiding element 260.

In this way, the second diffusing element 271 and the second collimating element 272 play a role of amplifying the incident third detection light 204 and then inputting the amplified third detection light into the light guide element 260.

Specifically, the third detection light 204 enters the second optical assembly 270, first passes through the second diffusion element 271, and the third detection light 204 is scattered to become a diffused light path. The diffused second detection light 204 enters the second collimating element 272, and the second collimating element 272 changes the diffused light path into a parallel light path, so that the area of the third detection light 204 entering the light guide element 260 is enlarged.

Illustratively, the third detection light ray 204 is emitted from the light source 210 and first enters the optical switch 250 through the first light port 251. The third detection light 204 incident on the light switch 250 is incident on the second diffusion element 271 through the second light port 252, and the third detection light 204 is scattered to become a diffusion light path. The diffused third detection light 204 further enters the second collimating element 272, and the second collimating element 272 changes the diffused light path into a parallel light path. The third detection light ray 204 is directed downward into the light guide element 260. It is understood that the user may swing the arm during walking and the wearable device 100 may be worn on the user's wrist while the light guiding element 260 is corresponding to the user's leg or waist-abdomen position. When a user walks, the arm naturally waves back and forth, the arm passes through the leg or waist and abdomen position once when the user walks, the third detection light 204 is emitted to the leg or waist and abdomen position of the user through the light guide element 260, and the third detection light 204 cannot penetrate when meeting the leg or waist and abdomen and is reflected back along a certain angle. The reflected light is the fourth detection light 205, the light guide element 260 receives the fourth detection light 205, and the fourth detection light 205 passes through the light guide element 260 upward and enters the optical switch 250 through the second collimating element 272, the second diffusing element 271 and the fourth optical port 254 along the original optical path. In this process, the second optical port 252 of the optical switch 250 is closed, the fourth detection light 205 is incident to the optoelectronic device 230 through the third optical port 253 to the left, and the optoelectronic device 230 forms the second signal 206.

Referring to fig. 2 and 5, in some embodiments, the detection component 200 includes a flexible element 280 coupled to the single mode fiber 220. The flexible member 280 is adapted to be pressed against the target object.

In this manner, the flexible member 280 makes the sensed data more accurate.

In particular, flexible member 280 is adapted to contact the skin of the user, sensing vasodilation and contraction. Upon vasodilation and contraction, the flexible element 280 deforms, which in turn causes the bragg grating (FBG) to be under tension or pressure, causing the grating length to change. In the embodiment of the present application, the flexible element 280 may be a PET film inflation cavity, but the type of the material of the flexible element 280 is not specifically limited, so as to meet the requirement.

Referring to fig. 2, in some embodiments, flexible element 280 is formed with an air cavity 281.

In this way, the air chamber 281 may ensure more accurate detection data on the one hand and may improve the wearing comfort of the user on the other hand.

In particular, air chamber 281 is used for accurate sensing of vasodilation and contraction, and air chamber 281 conforms to the skin of the user for better comfort. Illustratively, 25 × 50 single-mode fibers 220 with bragg gratings (FBGs) are integrated under the air cavity 281, and the flexible element 280 is in contact with the wrist, so that the air cavity 281 can experience vasodilation and contraction, and the vasodilation and contraction of the blood vessel cause the displacement of the air cavity 281, so that the bragg gratings (FBGs) are under tension or pressure, which causes the grating length to change.

Referring to fig. 1, 5 and 6, in some embodiments, wearable device 100 includes a processor 120 and a display 130. The processor 120 is configured to process the first signal 203 and control the display 130 to display the physiological parameter.

As such, the processor 120 and display 130 allow the user to learn specific physiological parameter information.

Specifically, the processor 120 is electrically connected to the optoelectronic device 230, a signal generated by the optoelectronic device 230 is transmitted to the processor 120, and the processor 120 receives and identifies the signal. The processor 120 controls the display 130 to display the corresponding parameters according to the different signals. In one example, the processor 120 may receive and process the first signal 203 and control the display 130 to display values such as blood pressure and pulse. In another example, the processor 120 may also receive and process the second signal 206 and control the display 130 to display the number of steps, the length of the walk, and the like.

The display 130 may include a capacitive touch display screen 131 and a backlight 132, where the capacitive touch display screen 131 is used to display physiological parameter values, and support multi-touch, and a user may control the wearable device 100 by clicking, sliding, and the like, the capacitive touch display screen 131. For example, the capacitive touch screen 131 may be clicked to wake up the screen, and the sliding capacitive touch screen 131 selects a different operating mode. The backlight 132 is disposed below the capacitive touch screen 131, and the backlight 132 is configured to inject a light source into the capacitive touch screen 131 to provide the light source for the capacitive touch screen 131, so that the display 130 can operate normally. The backlight 132 may be an LED light source, and the backlight 132 may be in the form of a tape. The number of backlights 132 is not limited herein.

More specifically, the wearable device 100 may include a bluetooth transmitter 140 and a vibrator 150, where the bluetooth transmitter 140 is used to connect with a terminal device such as a mobile phone or a computer, and read, store and share the measurement result. The vibrator 150 may vibrate to remind people. It is understood that the wearable device 100 may further include a housing 160, the housing 160 including a built-in space, and the processor 120, the display 130, the bluetooth transmitter 140, and the vibrator 150 are disposed in the built-in space of the housing 160. The material of the housing 160 is not limited in this application and may be various plastic polymers including PVC.

In addition, the wearable device 100 may further include an automatic band tightness adjuster 170 and silica gel 180, and the automatic band tightness adjuster 170 adjusts the tightness of the ring belt during the blood pressure measurement process, so that the flexible element 280 can fully sense the pulse vibration and ensure the measurement accuracy. Silica gel 180 is used for contacting with the wrist for the user feels comfortable. It is understood that the wearable device 100 may further include a battery module 190 and a charging interface 191, the battery module 190 is used for providing electric energy for the wearable device 100, and the charging interface 191 plays a role of charging.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A wearable device, comprising:

a wearing member; and

the setting is in wearing the last detection element of part, detection element includes light source, single mode fiber and photoelectric device, the light source is used for the process single mode fiber is to the first detection light of target object transmission, photoelectric device is used for receiving the warp the target object reflection and through single mode fiber's second detects light, and according to the second detects light and produces the first signal that is used for detecting physiological parameter.

2. The wearable device of claim 1, wherein the single mode fiber is formed with a bragg grating.

3. The wearable device of claim 1, wherein the detection component comprises a first optical assembly disposed between the light source and the single mode optical fiber, the first optical assembly configured to direct the first detection light to the single mode optical fiber.

4. The wearable device according to claim 3, wherein the first optical component includes a first diffusing element and a first collimating element arranged in this order along an optical path from the light source to the single-mode optical fiber, the first diffusing element is configured to diffuse the first detection light, and the first collimating element is configured to collimate the diffused first detection light to the single-mode optical fiber.

5. The wearable device according to claim 1, wherein the wearable device comprises an optical switch disposed between a light source and the single-mode fiber, the optical switch comprises a first optical port, a second optical port, and a third optical port disposed opposite to each other, the light source corresponds to the first optical port, the single-mode fiber corresponds to the second optical port, the photoelectric device corresponds to the third optical port, the first detection light sequentially passes through the first optical port and the second optical port, and the second detection light sequentially passes through the second optical port and the third optical port.

6. The wearable device according to claim 5, wherein the optical switch further comprises a fourth optical port, the light source is configured to emit a third detection light that sequentially passes through the first optical port and the fourth optical port, and the photoelectric device is configured to receive a fourth detection light that is reflected by an external object and sequentially passes through the fourth optical port and the third optical port, and generate a second signal according to the fourth detection light, the second signal being used for the wearable device to pass through the external object for a number of times.

7. The wearable device according to claim 6, wherein the wearable device comprises a light guide element disposed corresponding to the fourth light port, and the light guide element is configured to conduct the third detection light and the fourth detection light.

8. The wearable device according to claim 7, wherein the detection component includes a second optical assembly disposed between the light guide element and the optical switch, and along a light path from the light source to the light guide element, the second optical assembly includes a second diffusing element and a second collimating element disposed in sequence, the second diffusing element is configured to diffuse the third detection light, and the second collimating element is configured to collimate the diffused third detection light to the light guide element.

9. The wearable device according to claim 1, wherein the detection component comprises a flexible element connected to the single mode fiber, the flexible element configured to be pressed against the target object.

10. The wearable device of claim 9, wherein the flexible member is formed with an air cavity.

11. The wearable device of claim 1, comprising a processor and a display, the processor to process the first signal and control the display to display the physiological parameter.