CN217930532U - Optical sensor - Google Patents
Optical sensor Download PDFInfo
- Publication number
- CN217930532U CN217930532U CN202222212615.3U CN202222212615U CN217930532U CN 217930532 U CN217930532 U CN 217930532U CN 202222212615 U CN202222212615 U CN 202222212615U CN 217930532 U CN217930532 U CN 217930532U
- Authority
- CN
- China
- Prior art keywords
- optical sensor
- grating
- optical fiber
- diaphragm
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The application relates to an optical sensor, optical sensor include diaphragm and optic fibre, and optic fibre is provided with the grating, and the grating can take place the deformation along with the vibration of diaphragm, and then changes the optical property of light in the grating to convert vibration signal into light signal, thereby improve optical sensor and to the sensitivity and the accuracy that physiological signal vibration detected.
Description
Technical Field
The application relates to the technical field of sensors, in particular to an optical sensor.
Background
At present, physiological signals such as cardiopulmonary sounds are collected in a common electrical mode, for example, sounds are collected through a microphone, and a moving coil type microphone and a capacitor type microphone are common. However, the capacitive microphone has the problems of low sensitivity and low frequency range, which not only affects the sound quality of the physiological signal, but also affects the subsequent identification of noise.
SUMMERY OF THE UTILITY MODEL
The application provides an optical sensor for solving the problem that the micro-vibration sensitivity of the sensor to physiological signals is low.
The present application provides an optical sensor, the optical sensor comprising:
a membrane;
the optical fiber is provided with a grating and is used for transmitting an optical signal emitted by a light source;
the grating can deform along with the vibration of the diaphragm and is used for changing an optical signal passing through the grating.
In a possible embodiment, the portion of the optical fiber provided with the grating is fixedly connected to the membrane.
In a possible embodiment, the optical fiber is provided with a connection point, which is fixedly connected to the membrane.
In a possible embodiment, the two ends of the grating are respectively provided with the connection points.
In a possible embodiment, the portion of the optical fiber provided with the grating is arranged parallel to the membrane.
In a possible embodiment, the optical sensor comprises a housing provided with an opening, the diaphragm being mounted to the opening.
In a possible embodiment, one end of the optical fiber is provided with an entrance port and the other end is provided with an exit port.
In a possible embodiment, the optical fiber is provided with a connecting section connecting the entrance port and the exit port.
In a possible embodiment, the optical sensor comprises a light detector, which is connected to the exit opening.
In a possible embodiment, the optical sensor further comprises an electronic processor for receiving and processing the signal of the photodetector.
The application provides an optical sensor, optical sensor include diaphragm and optic fibre, and optic fibre is provided with the grating, and the grating can take place to deform along with the vibration of diaphragm, and then changes the optical property of light in the grating to convert vibration signal into light signal, thereby improve optical sensor to vibration signal detection's sensitivity and accuracy.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a cross-sectional view of an optical sensor provided herein;
FIG. 2 is a cross-sectional view of another perspective of an optical sensor provided herein;
fig. 3 is a schematic structural diagram of an optical sensor provided in the present application.
Reference numerals:
1-a shell;
11-opening;
12-mounting holes;
2-a membrane;
3-an optical fiber;
31-a grating;
33-entrance port;
34-an exit port;
35-a connecting segment;
36-a connection point;
4-a light source;
5-a light detector;
6-an electronic processor;
7-the object to be detected.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.
Detailed Description
In order to better understand the technical solution of the present application, the following detailed description is made with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
As shown in fig. 1, the present embodiment provides an optical sensor, which includes a diaphragm 2 and an optical fiber 3, the optical fiber 3 is provided with a grating 31, and the optical fiber 3 is used for transmitting an optical signal emitted by a light source 4, wherein the optical fiber 3 can deform along with the vibration of the diaphragm 2, and is used for changing the optical signal passing through the grating 31.
The optical sensor provided by the embodiment of the application is used for converting the sound signal into the optical signal and improving the accuracy of vibration collection and monitoring. The current devices usually adopt a condenser microphone to convert an acoustic signal generated by vibration into an electrical signal, but the sensitivity of the condenser microphone is not high, and the frequency corresponding interval is high, and the condenser microphone easily receives noise in the environment when receiving sound, thereby affecting the detection accuracy. The optical sensor provided by the embodiment of the application has the diaphragm 2 and the optical fiber 3, the diaphragm 2 is used for being attached to an object 7 to be detected, and the optical fiber 3 is provided with the grating 31. Sound is produced by the vibration, consequently when waiting to detect object 7 and making sound, at least partial object 7 that detects can take place to vibrate, when optical sensor gathered sound, diaphragm 2 with wait to detect the laminating of object 7 to by waiting to detect object 7 and drive and take place the vibration, compare in the vibration that can directly monitor the object that detects through the microphone, the optical sensor sensitivity that this application embodiment provided is higher. The diaphragm 2 has elasticity and smooth surface, and the optical fiber 3 also deforms along with the vibration of the diaphragm, so that the period of the grating 31 is changed, and the accurate detection of sound and vibration is realized.
In a possible embodiment, as shown in fig. 1, the part of the optical fiber 3 provided with the grating 31 is fixedly connected to the membrane 2.
λ B ＝2n eff ∧
wherein n is eff Is the effective refractive index of the back-coupled mode, λ B Is the Bragg wavelength, λ, reflected by the grating 31 broad Is the wavelength of the incident light, the wavelength of the transmitted light is lambda broad -λ B When the optical fiber 3 is elastically deformed along with the diaphragm 2, that is, the Bragg grating period Lambda of the optical fiber is increased or decreased along with the vibration of the diaphragm 2, the wavelength of the transmitted light is shifted, and the Bragg wavelength Lambda is measured B By shifting, or calculating, the wavelength λ of the transmitted light broad -λ B The vibration is monitored, and the sound is further detected. The Bragg grating has the advantages of low loss, electromagnetic interference resistance, small size, light weight and high sensitivity, and can realize accurate acquisition and monitoring of vibration by optical sensingAnd (6) measuring.
As shown in fig. 1 and 2, in one possible embodiment, the optical fiber 3 is provided with a connection point 36, the connection point 36 being fixedly connected to the membrane 2.
The connection point 36 is arranged at the part of the optical fiber 3 where the grating 31 is arranged, the connection point 36 can be fixedly connected with the diaphragm 2 through glue or the like, and when the diaphragm 2 vibrates, the grating 31 can deform along with the vibration of the diaphragm 2.
In one possible embodiment, as shown in fig. 1 and 2, the grating 31 is provided with connection points 36 at both ends.
The connection points 36 are arranged at two ends of the grating 31, so that the grating 31 can be stably connected with the diaphragm 2 and can deform along with the vibration of the diaphragm 2, and the accuracy of the optical sensor for detecting the vibration is improved.
In a possible embodiment, as shown in fig. 1, the part of the optical fiber 3 provided with the grating 31 is arranged parallel to the membrane 2.
As shown in fig. 1, in one possible embodiment, the optical sensor comprises a housing 1, the housing 1 being provided with an opening 11, the diaphragm 2 being mounted to the opening 11.
As shown in fig. 1, in one possible embodiment, one end of the optical fiber 3 is provided with an entrance port 33 and the other end is provided with an exit port 34.
The housing 1 is provided with a mounting hole 12 for facilitating mounting of an entrance port 33 and an exit port 34 of the optical fiber 3, and when the optical sensor is operated, light enters the optical fiber 3 from the entrance port 33 and exits from the exit port 34.
As shown in fig. 1, in one possible embodiment, the optical fiber 3 is provided with a connecting section 35, the connecting section 35 connecting the entrance port 33 and the exit port 34.
The connection section 35 may be provided in a curved shape so as to facilitate adjustment of the positions of the entrance port 33 and the exit port 34, and by using the elasticity of the curved portion, the tensile force of the connection section 35 to the diaphragm 2 can be reduced, thereby improving the stability of connection of the optical fiber 3 and the diaphragm 2.
In one possible embodiment, as shown in fig. 1, the side of the housing 1 remote from the opening 11 is provided with a mounting hole 12, and the entrance port 33 and the exit port 34 respectively protrude from the mounting hole 12 out of the housing 1.
The mounting holes 12 are used for mounting the incident port 33 and the exit port 34 at two ends of the optical fiber 3, and two ends of the optical fiber 3 respectively extend out of the housing 1 to be matched with other components.
In a possible embodiment, as shown in fig. 3, the optical sensor comprises a light detector 5, the light detector 5 being connected to the exit opening 34.
When the grating 31 deforms along with the vibration of the diaphragm 2, the period of the grating 31 changes, so that the wavelength of the transmitted light shifts, and the optical detector 5 is used for scanning the wavelength and outputting an electric signal corresponding to the vibration, thereby facilitating the later conversion, analysis and processing.
The embodiment of the application provides an optical sensor, optical sensor includes diaphragm 2 and optic fibre 3, and optic fibre 3 is provided with grating 31, and grating 31 can take place deformation along with the vibration of diaphragm 2, and then changes the optical property of light in the grating 31 to convert vibration signal into light signal, thereby improve optical sensor to the sensitivity and the accuracy of physiological signal vibration detection.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An optical sensor, characterized in that the optical sensor comprises:
a membrane (2);
the optical fiber (3), the said optical fiber (3) has grating (31), the optical fiber (3) is used for transmitting the optical signal that the light source (4) sends out;
wherein the grating (31) is deformable in response to vibration of the diaphragm (2) for changing the optical signal passing through the grating (31).
2. Optical sensor according to claim 1, characterized in that the portion of the optical fiber (3) provided with the grating (31) is fixedly connected to the membrane (2).
3. Optical sensor according to claim 2, characterized in that the optical fiber (3) is provided with a connection point (36), which connection point (36) is fixedly connected to the membrane (2).
4. Optical sensor according to claim 3, characterized in that the grating (31) is provided with the connection points (36) at both ends, respectively.
5. Optical sensor according to claim 1, characterized in that the portion of the optical fiber (3) provided with the grating (31) is arranged parallel to the membrane (2).
6. Optical sensor according to claim 1, characterized in that the optical sensor comprises a housing (1), the housing (1) being provided with an opening (11), the diaphragm (2) being mounted to the opening (11).
7. Optical sensor according to any one of claims 1 to 6, characterized in that one end of the optical fiber (3) is provided with an entrance port (33) and the other end with an exit port (34).
8. Optical sensor according to claim 7, characterized in that the optical fiber (3) is provided with a connecting section (35), the connecting section (35) connecting the entrance port (33) and the exit port (34).
9. The optical sensor according to claim 7, characterized in that it comprises a light detector (5), said light detector (5) being connected to said exit opening (34).
10. The optical sensor according to claim 9, characterized in that it further comprises an electronic processor (6), said electronic processor (6) being adapted to receive and process signals of said photodetector (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222212615.3U CN217930532U (en) | 2022-08-22 | 2022-08-22 | Optical sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222212615.3U CN217930532U (en) | 2022-08-22 | 2022-08-22 | Optical sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217930532U true CN217930532U (en) | 2022-11-29 |
Family
ID=84170791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222212615.3U Active CN217930532U (en) | 2022-08-22 | 2022-08-22 | Optical sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217930532U (en) |
-
2022
- 2022-08-22 CN CN202222212615.3U patent/CN217930532U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DK3004829T3 (en) | Optical pressure sensor | |
| US6483619B1 (en) | Optical-interference microphone | |
| CN101729967B (en) | Acousto-optic conversion method and optical microphone based on multiple-mode interference | |
| WO2009099823A1 (en) | Fiber optic acceleration and displacement sensors | |
| CN108375412A (en) | High sensitivity optical fiber sonac based on microcantilever beam | |
| KR20080031477A (en) | Microphone element | |
| CN217930532U (en) | Optical sensor | |
| CN113804281A (en) | Sound wave vibration measuring device based on F-P optical fiber Fabry-Perot sensing principle | |
| CN110849464B (en) | Optical fiber Fabry-Perot sound sensor based on hub-shaped vibrating diaphragm | |
| CN115127663A (en) | Multi-core fiber-based multi-dimensional vibration sensor and vibration detection method | |
| CN217930530U (en) | Optical sensor | |
| CN110057439A (en) | A kind of low quick sensing device of resonance eccentric core fiber sound based on F-P interference | |
| KR101336700B1 (en) | Fiber Optic interfer Interferometric Sensor, Method for Simultaneous Detection of the Levels of Vibration, Sound and Recording Medium Thereof | |
| CN102692268B (en) | Distributed optical fiber vibration sensor for structural vibration detection | |
| CN213749616U (en) | Multi-reflection cavity probe and equipment for Raman spectrum gas detection | |
| US20180149672A1 (en) | Intensity modulated fiber optic accelerometers and sensor system | |
| JP2003337063A (en) | Optical interference type ae sensor, ae sensor unit, and ae measurement system | |
| CN105842478A (en) | High temperature-resistant integrated elastically-structured optical fiber P-F cavity acceleration sensor | |
| CN111664880A (en) | Optical fiber sensor based on Fabry-Perot and application thereof | |
| CN201993214U (en) | Distributed optical fiber vibrating sensor for structural vibration detection | |
| CN217034004U (en) | Optical fiber acceleration sensor with single structure | |
| CN219474786U (en) | Single-film double-fiber multipath optical fiber MEMS sound pressure sensor probe and sensor device | |
| CN219048580U (en) | Stethoscope and auscultation system | |
| CN108426632B (en) | Acoustic pressure and airflow sensor based on MEMS | |
| CN115363623A (en) | Diagnostic instrument and diagnostic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |