CN113686822A - Sensing device, sensing system and regulation and control method based on surface plasma resonance - Google Patents
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Abstract
The invention provides a sensing device, a sensing system and a regulation and control method based on surface plasma resonance, wherein the sensing device comprises a regulation and control light unit for emitting adjustable and control light with different attributes; the linearly polarized light unit is used for receiving an incident light signal sent by an external environment or an incident light signal light source and converting the incident light signal into linearly polarized light; the sensing unit comprises an optical fiber, an optical fiber and a sensing unit; the outer surface of the optical fiber is plated with a first coating, the outer surface of the first coating is coated with a second coating, and the sensing unit receives linearly polarized light and modulation and control light so as to excite the first coating to generate surface plasma resonance; wherein, the second coating is adjusted by the adjustable light emitted by the adjustable light unit. By adjusting and controlling the light unit, certain characteristics of the environment and the second coating on the optical fiber of the sensing unit can be changed, and the surface plasma resonance environment excited by the first coating in the sensing unit can be closer to the most sensitive measurement interval of the sensing unit.
Description
Technical Field
The invention relates to the technical field of optical fiber sensing, in particular to a sensing device, a sensing system and a regulation and control method based on surface plasmon resonance.
Background
In the prior art, compared with the traditional prism-type SPR sensing unit, the optical fiber SPR sensor is still in research and improvement in aspects of detection environment limit, sensitivity, stability and the like, and by combining the characteristics available in various detection fields, the optical fiber SPR sensor develops and researches a plurality of sensors with structures and application environments.
The existing sensor has the defects of single detection on all parameters of the environment, low sensitivity and applicability to only a single environment. Resulting in limited functionality of the sensor.
Disclosure of Invention
The invention aims to solve the problems of single detection of environmental parameters, low sensitivity, narrow detection range of the environmental parameters and high sensitivity, single applicable environment and multi-parameter cross sensitivity in the related art, thereby providing a sensing device based on surface plasmon resonance.
It is a second object of the present invention to provide a sensing system based on surface plasmon resonance.
The third purpose of the invention is to provide a regulation and control method based on surface plasmon resonance.
In an optional scheme of the present application, first, a sensing device based on surface plasmon resonance includes a light modulation and control unit configured to emit tunable and controllable light with different attributes, where the attributes include wavelength, intensity, and frequency; the linearly polarized light unit is used for receiving an incident light signal sent by an external environment or an incident light signal light source and converting the incident light signal into linearly polarized light; the sensing unit comprises an optical fiber, an optical fiber and a sensing unit; the outer surface of the optical fiber is plated with a first coating, the outer surface of the first coating is coated with a second coating, and the sensing unit receives linearly polarized light and modulation and control light so as to excite the first coating to generate surface plasma resonance; wherein, the second coating is adjusted by the adjustable light emitted by the adjustable light unit.
In an alternative aspect of the present application, a linearly polarized light unit includes: a polarizer and a polarization controller; the polarizer is coupled with the polarization controller; wherein, the incident light signal is converted into linearly polarized light through a polarizer; the linearly polarized light is adjusted in polarization direction via a polarization controller.
In an optional scheme of the application, linearly polarized light enters the sensing unit along the optical fiber, and light can be regulated and controlled to enter the second coating.
In an alternative aspect of the present application, the optical fiber includes at least one of a single mode fiber, a multimode fiber, a tapered fiber, a U-shaped fiber, a D-shaped fiber, a hollow core fiber, and a photonic crystal fiber.
In an optional scheme of the application, the sensing unit further comprises a fiber grating, and the fiber grating couples the linearly polarized light and the adjustable light which pass through the fiber core to the cladding to excite the first coating to generate surface plasmon resonance.
In an alternative aspect of the present application, the light-modulating and controlling unit includes: a base light emitter for emitting base light; a wavelength converter for adjusting a wavelength of the base light; the LC oscillating circuit is electrically connected with the basic light emitter and is used for adjusting the frequency of the basic light; and a light intensity adjuster for changing a current or a voltage of the base light emitter to adjust an intensity of the base light.
In an alternative aspect of the present application, the sensing device further includes: the photoelectric converter is used for converting the output optical signal output by the sensor into a digital signal; the wireless transceiving module is used for carrying out wireless communication with the spectrometer and transmitting the digital signal converted from the output optical signal to the spectrometer; and the controller controls the light adjusting and controlling unit to adjust the attribute of the adjustable and controllable light in a feedback manner according to the instruction fed back by the spectrometer.
In an alternative aspect of the present application, the first plating layer comprises: at least one of a metal, a metal oxide, a multi-metal mixture, a metal-metal oxide mixture, a two-dimensional material; the second coating is a two-dimensional material and comprises at least one of graphene, two-dimensional transition metal sulfide, black scale, MXene material, hexagonal boron nitride, graphite phase carbon nitride, layered metal oxide and layered double oxide.
In a further alternative of the present application, the metal comprises: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide; when the first plating layer is a metal, the second plating layer includes: at least one of graphene and tungsten disulfide.
On the other hand, an embodiment of the present invention further provides a sensing system based on surface plasmon resonance, where the sensing system includes the sensing device as described above, and further includes: and the spectrometer is used for receiving the output light of the sensing unit and analyzing the spectral data according to the output light.
Finally, an embodiment of the present invention further provides a regulation and control method based on surface plasmon resonance, which is applied to the sensing system, and the regulation and control method includes: receiving an incident light signal sent by an external environment or an incident light signal light source, and converting the incident light signal into linearly polarized light; inputting linearly polarized light to a sensing unit; controlling a sensing unit to sense an external environment; inputting output light of the sensing unit to a spectrometer; the property of the adjustable light is adjusted through the adjusting and controlling light unit through the analysis data of the spectrometer, so that the surface plasma resonance environment excited by the first coating is closer to the most sensitive measuring interval of the rod penetrating unit.
In an optional scheme of the embodiment of the present invention, adjusting the property of the controllable light by the light controlling unit includes: at least one of the wavelength, intensity, or frequency of the tunable light is changed.
In the foregoing technical solution, an embodiment of the present invention provides a sensing device based on surface plasmon resonance, where the sensing device is configured with a second plating layer in a sensing unit, and a light modulation unit is used to change some characteristics of an environment and the second plating layer on an optical fiber of the sensing unit, so that a surface plasmon resonance environment excited by a first plating layer in the sensing unit is closer to a most sensitive measurement region of the sensing unit, and further sensitivity of sensing to various parameters of the environment is improved. When the external environment condition changes, the second coating and the light regulating and controlling unit are regulated to enable the surface plasma resonance environment excited by the first coating in the sensing unit to be closer to the most sensitive measuring interval of the sensing unit, so that the sensing detection interval range of the sensing unit is widened.
Through the design of adjustment sensing unit, like the shape of the optic fibre of design difference, use different optic fibre types, carve into different kinds of grating, use different first cladding material, realize detecting the relevant parameter of environment in various different environment, after sensing unit was produced simultaneously, can also widen the service environment that sensing unit measured through adjusting second cladding material and regulation and control light unit.
Through the adjustable and controllable light regulation and control, certain characteristics of the environment and the second coating are changed, a sensing unit is used for simultaneously measuring a plurality of environment parameters, and the problem of multi-parameter cross sensitivity can be solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic representation of a connection topology of a sensing system provided by an embodiment of the present invention;
fig. 2 schematically shows a structural cross-sectional view of a sensing unit provided according to an embodiment of the present invention;
FIG. 3 schematically illustrates a block diagram of a particular sensing device provided in accordance with a second embodiment of the present invention;
fig. 4 schematically shows an internal structural view of a sensing unit according to a second embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a sensing device provided by an embodiment of the invention; and
fig. 6 shows a flowchart of a surface plasmon resonance-based tuning method according to an embodiment of the present invention.
Description of the reference numerals
100. A sensing system; 200. a sensing device; 10. a linearly polarized light unit; 30. a sensing unit; 40. a spectrometer; 301. an optical fiber; 302. a first plating layer; 303. a second plating layer; 101. a signal light source; 102. a polarizer; 103. a polarization controller.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
A sensing system based on surface plasmon resonance is proposed. The method aims to solve the problems that the sensing unit 30 in the prior art has single detection on all environmental parameters, low sensitivity, narrow detection range of the environmental parameters and high sensitivity, the device is single in applicable environment and multi-parameter cross-sensitive.
[ EXAMPLES one ]
Referring to fig. 1, fig. 1 schematically illustrates a connection topology of a sensing system provided by an embodiment of the present invention; the sensing system 100 includes disposed along an optical path:
the linearly polarized light unit 10 is used for receiving an incident light signal emitted by an external environment or an incident light signal light source and converting the incident light signal into linearly polarized light;
a light-modulating and controlling unit 20 for emitting modulated light of different attributes, including wavelength, intensity, frequency;
the sensing unit 30 receives and outputs the linearly polarized light and the adjustable and controllable light, and then the linearly polarized light and the adjustable and controllable light are received by the spectrometer 40;
and a spectrometer 40 for analyzing the spectrum to adjust the sensing unit 30 by the spectrum.
Specifically, the linearly polarized light unit 10 and the tuning and control light unit 20 can produce two different light signals, namely linearly polarized light and tunable and controllable light, and under normal conditions, the linearly polarized light unit 10 is transmitted along a single optical fiber; and transmitted to the sensing unit 30. The signal transmitted at the back end of the sensing cell 30 is transmitted to the spectrometer 40 and the spectrum is then analyzed by the spectrometer 40.
It can be understood that in the propagation direction of the light emitted by the linearly polarized light unit 10, the light vibrates as a vector only in a fixed direction, and the light is called planar linearly polarized light because the locus of the end point of the light vector is a straight line, which is also called linearly polarized light. The plane formed by the direction of the light vector and the propagation direction of the light is called a vibration plane. The plane of vibration of the linearly polarized light is fixed and does not rotate, and the tunable light may be a variable property light, wherein the property specifically includes any one or more of wavelength, intensity and frequency. The above-mentioned sensing system 100 provided by the embodiment of the present invention uses the optical path to connect the above devices, which is a common technical means understood by those skilled in the art, and is not more than illustrated here in the implementation of the present invention.
Referring to fig. 2, fig. 2 schematically illustrates a structural cross-sectional view of a sensing unit 30 according to an embodiment of the present invention, further, the sensing unit 30 includes an optical fiber 301, a first plating layer 302, and a second plating layer 303; the outer surface of the optical fiber 301 is coated with a first coating 302, the outer surface of the first coating 302 is coated with a second coating 303, and the sensing unit 30 receives the modulated linearly polarized light and the modulated light, that is, the amount output by the wavelength division multiplexer 20 excites the first coating 302 to generate surface plasmon resonance.
Wherein the second plating layer 303 is a two-dimensional material comprising: at least one of graphene, a two-dimensional transition metal sulfide, black scale, MXene material, hexagonal boron nitride, graphite phase carbon nitride, a layered metal oxide, and a layered bimetal oxide.
It is understood that the two-dimensional material used for the second plating layer 302 refers to a material in which electrons can move freely (planar motion) only in two dimensions of nanometer scale (1-100 nm).
The first plating layer 302 includes: at least one of a metal, a metal oxide, a multi-metal mixture, a metal and metal oxide mixture, a two-dimensional material.
Wherein the metal comprises: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide;
in a general inventive concept provided by the embodiment of the present invention, the second plating layer 303 of the sensing unit 30 in the sensing system 100 is configured to adjust the sensing unit 30 by adding the adjustable light made in the adjustable light unit 20 in the system, for example, by changing the adjustable wavelength, frequency or intensity, so as to change certain characteristics of the environment and the second plating layer 303 on the optical fiber 301 of the sensing unit 30, so that the surface plasmon resonance environment excited by the first plating layer 302 in the sensing unit 30 can be closer to the most sensitive measurement region of the sensing unit 30, and the sensitivity of sensing various parameters of the environment can be further improved. When the external environment changes, the surface plasmon resonance environment excited by the first plating layer 302 in the sensing unit 30 is closer to the most sensitive measurement interval of the sensing unit 30 by adjusting the second plating layer 303 and the tuning and control optical unit, so that the sensing detection interval range of the sensing unit 30 is widened.
[ example two ]
Referring to fig. 3 and 4, fig. 3 is a block diagram schematically illustrating a specific sensing device according to a second embodiment of the invention; fig. 4 schematically shows an internal structural diagram of the sensing unit 30 according to the second embodiment of the present invention. In a particular embodiment, the linearly polarized light unit 10 includes: a signal light source 101, a polarizer 102, a polarization controller 103, and a modulation and control light unit 20; the signal light source 101 outputs an incident light signal, and the incident light signal is converted into linearly polarized light through the polarizer 102; the modulated light unit 20 outputs modulated light; the polarization direction of the linearly polarized light is adjusted by the polarization controller, wherein the second plating layer 303 is adjusted by the adjustable light output by the adjustable light unit 20.
It can be understood that the incident light is converted into linearly polarized light by the Polarizer 102 (the Polarizer 102 refers to a device for obtaining linearly polarized light from natural light, which is emitted by a signal light source), the polarization controller 103 can be used for adjusting the polarization direction of the linearly polarized light, the tunable light unit 20 outputs the tunable light, and the modulated linearly polarized light and the tunable light are input to the sensing unit 30, and then are received by the spectrometer 40 and begin to analyze the spectrum.
In one embodiment, the sensing system 100 can analyze various environmental parameters in the surrounding environment by analyzing the data of the spectrometer 40, and can further improve the detection sensitivity of sensing to various environmental parameters by adjusting and controlling the adjustable light by the adjusting and controlling light unit 20 and adjusting and controlling the related structure of the sensing unit 30, thereby widening the sensing detection interval range of the sensing unit 30, widening the use environment measured by the sensing unit 30, and simultaneously detecting the effects of various environmental parameters.
It can be understood that, in detecting different detection environments and different parameters, the design can be specifically performed according to actual requirements, that is, in detecting solid, liquid and gas, or detecting environmental composition, detecting environmental refractive index and detecting environmental temperature, different sensing units 30 can be designed for different situations to detect, but no matter what sensing unit 30 is used, as long as the adjustable light output by the adjustable light unit is used for adjustment, the sensitivity of the sensing unit 30 for detecting various environmental parameters can be further improved, thereby widening the sensing detection interval range of the sensing unit 30, widening the use environment measured by the sensing unit 30, and simultaneously detecting the effect of various environmental parameters.
Referring to fig. 4, the sensing unit 30 includes an optical fiber 301, a first plating layer 302, and a second plating layer 303; the outer surface of the optical fiber 301 is coated with a first coating 302, the outer surface of the first coating 302 is coated with a second coating 303, the sensing unit 30 receives the modulated linearly polarized light and the adjustable light, that is, the amount output by the wavelength division multiplexer 20 excites the first coating 302 to generate surface plasmon resonance, wherein the second coating 303 is adjusted by the adjustable light output by the adjustable light unit.
The second plating layer 303 is regulated and controlled by the adjustable and controllable light, so that the sensing unit 30 can be regulated and controlled, and the related performance of the sensing unit 30 can be regulated only by regulating the adjustable and controllable light output by the adjustable and controllable light unit 20.
Furthermore, the optical fiber 301 may be various, different types of optical fibers may be used in different environments, materials and components of the optical fiber may be changed, and different shapes may be designed to specifically design the optical fiber according to actual conditions.
In one embodiment, the optical fiber 301 may comprise at least one of a single mode fiber, a multimode fiber, a tapered fiber, a U-shaped fiber, a D-shaped fiber, a hollow core fiber, and a photonic crystal fiber.
In some improved embodiments, in order to adapt to different environments and detect different parameters, besides different types of optical fibers, gratings can be engraved in the optical fibers, different gratings can achieve different effects, the refractive index of the gratings can be modulated, the interval and the inclination angle of the gratings can be changed, and different purposes can be achieved through special design of the gratings in different situations.
As in one embodiment, the sensing unit 30 may further include a fiber grating (micro-component, not shown) that couples the modulated linearly polarized light of the core and the tunable light to the cladding to excite the first cladding to generate surface plasmon resonance. The adaptive setting is specifically based on the environment and hardware configuration of the sensing unit 30.
When light can be regulated and control to second cladding material 303, different second cladding material 303 can produce different effects, possess different material parameters, and in different fields, the material of adoption is also different, can adopt different second cladding material 303 according to actual need, simultaneously, can adopt different second cladding material 303 to make up.
In one embodiment, different numbers of second plating layers 303 can be used, all to achieve different results.
In a particular embodiment, the second plating layer 303 includes at least one of graphene, two-dimensional transition metal sulfide, alexandrite, MXene material, hexagonal boron nitride, graphite phase carbon nitride, layered metal oxide, layered bimetallic oxide.
In the sensing unit 30, a material capable of generating a surface plasmon resonance effect is required, and in different environments and different detection requirements, a suitable material can be selected according to actual conditions to design material parameters and achieve specific requirements.
In one embodiment, the first plating layer 302 may include: at least one of a metal, a metal oxide, a multi-metal mixture, a metal-metal oxide mixture, a metal oxide mixture, and a second plating layer.
Wherein the metals include: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide; the second plating layer includes: at least one of graphene and tungsten disulfide.
It should be noted that, according to experimental and practical analysis results, when the first plating layer 302 is a metal, applicable materials of the second plating layer 303 include: at least one of graphene and tungsten disulfide.
It is understood that the above materials and data obtained by experimental analysis and the required intelligence, and therefore all simple combinations and substitutions of isotopes, which can be made by the above materials and equivalents thereof, are within the scope of the invention as defined by the appended claims.
Therefore, the second plating layer 303 of the sensing unit 30 in the sensing system 100 is adjusted by adding adjustable light to the linearly polarized light unit 10, so that certain characteristics of the environment and the second plating layer 303 on the optical fiber 301 of the sensing unit 30 are changed, the surface plasmon resonance environment excited by the first plating layer 302 in the sensing unit 30 can be closer to the most sensitive measurement region of the sensing unit 30, and the sensitivity of sensing to various parameters of the environment is further improved. When the external environment changes, the second plating layer 303 and the light modulation and control unit can be adaptively adjusted according to the data analyzed by the spectrum, so that the surface plasmon resonance environment excited by the first plating layer 302 in the sensing unit 30 is closer to the most sensitive measurement interval of the sensing unit 30, thereby widening the sensing detection interval range of the sensing unit 30.
[ EXAMPLE III ]
In this embodiment, based on the sensing system provided in the second embodiment, only the units in the sensing system need to be packaged and miniaturized, so that the sensing device can continuously adapt to the external environment and always maintain the most sensitive measurement interval when the external environment is not suitable for human experiments and the external environment changes.
Referring to fig. 5, fig. 5 schematically illustrates a structural diagram of a sensing device according to an embodiment of the present invention; the sensing device 200 includes, disposed along the optical path direction:
the linearly polarized light unit 10 is used for receiving an incident light signal emitted by an external environment or an incident light signal light source and converting the incident light signal into linearly polarized light;
a light-modulating and controlling unit 20 for emitting modulated light of different attributes, including wavelength, intensity, frequency;
a sensing unit 30 for receiving and outputting the linearly polarized light and the controllable light;
the photoelectric converter is used for converting the output optical signal output by the sensor into a digital signal;
a wireless transceiver module (internal component, not shown) for wirelessly communicating with the spectrometer 40 and transmitting the digital signal converted from the output optical signal to the spectrometer 40;
a controller (internal component, not shown) controls the light-regulating unit 20 to adjust the properties of the light according to the feedback command of the spectrometer.
The linearly polarized light unit 10 and the adjusting and controlling light unit 20 can produce two different optical signals, namely linearly polarized light and adjustable and controllable light, and under normal conditions, the linearly polarized light unit 10 transmits along a single optical fiber; and transmitted to the sensing unit 30. The signal transmitted at the back end of the sensing cell 30 is transmitted to the spectrometer 40 and the spectrum is then analyzed by the spectrometer 40.
In the embodiment of the present invention, the output optical signal output by the sensor is subjected to digital-to-electrical conversion by the photoelectric converter, and is received by the serial port of the wireless transceiver module, and the digital signal is sent to the spectrometer 40 at the rear end by the wireless transceiver module, so that background analysis is performed on the spectrometer 40 by the spectrum, and a corresponding instruction is generated at the PC end of the spectrometer 40 by human experience and the mapping relationship between the spectrum and the adjustable light, so as to perform feedback adjustment on the control light adjusting unit 20, and change the attribute of the adjustable light.
Further, the wireless transceiver module may be any one of a Wifi transceiver module, a bluetooth transceiver module, and a Zigbee transceiver module, and may be specifically determined according to a specific environment to be measured, for example, in a base station or a remote measurement environment, data may be transmitted through Wifi, and the latter may be used for a short-distance measurement environment, so that the sensing device 200 obtains a more durable power supply capability.
The spectrometer 40 typically comprises a PC terminal for displaying spectral data, by which the spectral data can be read and analyzed so that the remotely controlled light modulating unit 20 changes the properties of the modulated light.
The controller can be a single chip microcomputer or a PLC; or may be replaced with digital and analog circuits. The above functional effects can be achieved only by satisfying the requirements.
The other units described above are described in the first embodiment and the second embodiment, and the description thereof is not repeated.
It can be appreciated that the above packaging of the sensing device 200 can achieve remote control effects, since the sensing device often measures different environments, since some environments are not manually accessible or frequently changed, such as high-pressure or high-cold environments; and it is inconvenient to move all kinds of hardware equipment of the sensing system, through encapsulating each unit in the above-mentioned sensing system, and miniaturizing, can place the sensing device in the environment that needs the measurement, thus carry out remote control, realize and adapt to the external environment absolutely, keep the most sensitive measuring interval all the time.
Further, the dimming light unit 20 (none of the following internal components are specifically illustrated by the drawings) includes:
a base light emitter for emitting base light;
a wavelength converter for adjusting a wavelength of the base light;
the LC oscillating circuit is electrically connected with the basic light emitter and is used for adjusting the frequency of the basic light;
and a light intensity adjuster for changing a current or a voltage of the base light emitter to adjust an intensity of the base light.
It should be understood that the sensing device is not limited to size and shape, and only needs to use the corresponding unit elements to achieve the same or similar functions, and all such sensing devices are within the scope of the present invention.
In summary, in the sensing device 200 provided in the embodiment of the present invention, the controller is connected to the light modulation and control unit 20, so as to remotely modulate the attribute of the light modulation and control according to the spectral data analyzed by the spectrometer 40, and thus, by changing some characteristics of the second plating layer in the sensing unit through the light modulation and control, the surface plasmon resonance environment excited by the first plating layer in the sensing unit can be closer to the most sensitive measurement region of the sensing unit, and is adapted to the external environment at present, and the most sensitive measurement region is maintained all the time. The sensing device 200 can be widely applied to various environments or measurement under the condition of environment change, and can adaptively adjust the property of the adjustable and controllable light according to the spectrum, so that the sensing unit always keeps the most sensitive measurement interval, and the accuracy, reliability and stability of measurement are ensured.
[ EXAMPLE IV ]
Referring to fig. 6, fig. 6 is a flowchart illustrating a regulation method based on surface plasmon resonance according to an embodiment of the present invention. As shown in fig. 6, in a fourth embodiment of the present invention, a method for regulating and controlling a sensing system based on surface plasmon resonance is further provided, which mainly includes the following steps:
step S100, receiving an incident light signal emitted by an external environment or an incident light signal light source, and converting the incident light signal into linearly polarized light.
Step S200, inputting linearly polarized light to a sensing unit;
step S300, controlling a sensing unit to sense an external environment;
step S400, inputting the output light of the sensing unit to a spectrometer;
s500, adjusting the attribute of the adjustable light through the light adjusting and controlling unit according to the analysis data of the spectrometer; so that the surface plasma resonance environment excited by the first coating is closer to the most sensitive measuring interval of the penetrating rod unit.
In one embodiment, through the above steps, a specific value of a parameter in the environment can be obtained by analyzing data on the spectrometer, so as to realize environment sensing.
It can be understood that the detection sensitivity of sensing to each parameter of the environment can be further improved through the adjustment of the adjustable light, the sensing detection range of the sensing unit is widened, the use environment measured by the sensing unit is widened, and the adjustable light-controlled environment sensing device is suitable for wider use scenes.
In addition, the light regulating and controlling unit can be adjusted according to actual conditions, so that a better sensing effect is achieved, multi-parameter sensing is realized, and the problem of cross sensitivity among multiple parameters is solved.
Adjusting the property of the tunable light by the tunable light unit includes: at least one of the wavelength, intensity, or frequency of the tunable light is changed.
In summary, the adjusting and controlling method provided by the embodiment of the present invention can adjust and control by adding the adjustable and controlled light, so that the environment and some characteristics of the second plating layer on the optical fiber of the sensing unit are changed, the surface plasma resonance environment excited by the first plating layer in the sensing unit can be closer to the most sensitive measurement region of the sensing unit, and the detection sensitivity of the sensing unit to various parameters of the environment is further improved. When the external environment condition changes, the second coating and the light regulating and controlling unit can be adaptively regulated according to the data analyzed by the spectrum, so that the surface plasma resonance environment excited by the first coating in the sensing unit is closer to the most sensitive measuring interval of the sensing unit, and the sensing detection interval range of the sensing unit is widened.
It should also be understood by those skilled in the art that if the control method or the sensing device provided by the present invention is simply changed, the above methods are added with functions to be combined, or the device is replaced, such as the replacement of model materials for each component, the replacement of use environment, the simple replacement of the position relationship of each component, etc.; or the products formed by the components are integrally arranged; or a detachable design; it is within the scope of the present invention to replace the methods and apparatus of the present invention with any method/apparatus/device that combines the components to form a method/apparatus/device with specific functionality.
The embodiment of the invention also provides a machine-readable storage medium, wherein a program is stored on the machine-readable storage medium, and when the program is executed by a processor, the program realizes the regulation and control method based on the surface plasma resonance.
The embodiment of the invention also provides a processor, which is used for running the program, wherein the program runs to execute the regulation and control method based on the surface plasma resonance.
The processor also comprises a memory, the surface plasmon resonance-based regulation and control method can be stored in the memory as a program unit, and the processor executes the program unit stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one kernel can be set, and light supplement is carried out by adjusting kernel parameters according to a regulation and control method based on surface plasmon resonance.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) or a non-volatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
The embodiment of the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for regulating and controlling based on surface plasmon resonance is implemented.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow or block of the flowchart illustrations or block diagrams, and combinations of flows or blocks in the flowchart illustrations or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processor to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processor, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processor to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processor to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A sensing device based on surface plasmon resonance, characterized in that the sensing device comprises
The light adjusting and controlling unit is used for emitting adjustable and controlled light with different attributes;
the linearly polarized light unit is used for receiving an incident light signal sent by an external environment or an incident light signal light source and converting the incident light signal into linearly polarized light;
the sensing unit comprises an optical fiber, wherein a first coating is plated on the outer surface of the optical fiber, a second coating is coated on the outer surface of the first coating, and the sensing unit receives the linearly polarized light and the adjusting and controlling light so as to excite the first coating to generate surface plasma resonance;
wherein, the second cladding is regulated by the adjustable light emitted by the adjustable light control unit.
2. The surface plasmon resonance-based sensing device of claim 1, wherein said linearly polarized light unit further comprises a polarizer and a polarization controller, said polarizer and said polarization controller being coupled;
wherein the incident light signal is converted into the linearly polarized light through the polarizer; the linearly polarized light is adjusted in polarization direction by the polarization controller.
3. The surface plasmon resonance based sensing device of claim 1 wherein said linearly polarized light enters said sensing element along said optical fiber and said tunable light is injected into said second cladding layer.
4. The surface plasmon resonance-based sensing apparatus of claim 1, wherein said optical fiber comprises at least one of a single mode fiber, a multimode fiber, a tapered fiber, a U-shaped fiber, a D-shaped fiber, a hollow core fiber, and a photonic crystal fiber.
5. The surface plasmon resonance-based sensing device of claim 1, wherein said sensing unit further comprises a fiber grating, said fiber grating coupling said linearly polarized light and said tunable light that pass through the fiber core to the cladding layer, exciting said first coating to produce surface plasmon resonance.
6. The surface plasmon resonance-based sensing apparatus of claim 1, wherein said tuning light unit comprises:
a base light emitter for emitting base light;
a wavelength converter for adjusting a wavelength of the base light;
the LC oscillating circuit is electrically connected with the basic light emitter and is used for adjusting the frequency of the basic light;
a light intensity adjuster for varying a current or voltage of the base light emitter to adjust an intensity of the base light.
7. The surface plasmon resonance-based sensing apparatus of any of claims 1 to 6, further comprising:
a photoelectric converter for converting the output optical signal output by the sensor into a digital signal;
the wireless transceiving module is used for carrying out wireless communication with the spectrometer and sending the digital signal converted from the output optical signal to the spectrometer;
and the controller controls the light adjusting and controlling unit to adjust the attribute of the adjustable and controllable light in a feedback manner according to the instruction fed back by the spectrometer.
8. A surface plasmon resonance based sensing system, comprising a surface plasmon resonance based sensing apparatus according to any of claims 1 to 7, the sensing system further comprising:
and the spectrometer is used for receiving the output optical signal of the sensing unit and analyzing the spectral data according to the output optical signal.
9. A regulation and control method based on surface plasmon resonance, which is applied to the sensing system based on surface plasmon resonance according to claim 8, and is characterized in that the regulation and control method comprises the following steps:
receiving the incident light signal emitted by an external environment or an incident light signal light source, and converting the incident light signal into the linearly polarized light;
inputting the linearly polarized light to the sensing unit;
controlling the sensing unit to sense the external environment;
inputting output light of the sensing unit to the spectrometer;
and adjusting the property of the adjustable and controllable light through the adjusting and controlling light unit according to the analysis data of the spectrometer, so that the surface plasma resonance environment excited by the first coating is closer to the most sensitive measurement interval of the rod penetrating unit.
10. The method of claim 9, wherein the adjusting the property of the tunable light by the tuning light unit comprises:
varying at least one of a wavelength, intensity, or frequency of the tunable light.
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