CN220271171U - Fluorescent oxygen sensor system based on optical computing chip - Google Patents
Fluorescent oxygen sensor system based on optical computing chip Download PDFInfo
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- CN220271171U CN220271171U CN202321857637.3U CN202321857637U CN220271171U CN 220271171 U CN220271171 U CN 220271171U CN 202321857637 U CN202321857637 U CN 202321857637U CN 220271171 U CN220271171 U CN 220271171U
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 239000001301 oxygen Substances 0.000 title claims abstract description 129
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 129
- 230000003287 optical effect Effects 0.000 title claims abstract description 80
- 238000004364 calculation method Methods 0.000 claims abstract description 38
- 230000005284 excitation Effects 0.000 claims abstract description 33
- 238000004891 communication Methods 0.000 claims abstract description 30
- 239000013307 optical fiber Substances 0.000 claims abstract description 30
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- 230000005540 biological transmission Effects 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
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- 239000011521 glass Substances 0.000 claims description 7
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- 239000011324 bead Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 9
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- 238000004519 manufacturing process Methods 0.000 abstract description 7
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- 238000012545 processing Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 230000004044 response Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 230000005283 ground state Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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Abstract
The utility model relates to a fluorescent oxygen sensing system based on an optical computing chip, which comprises: a light source module for outputting excitation light; the optical fiber sensing module is used for receiving the excitation light and generating a corresponding fluorescent signal under the action of the excitation light; an optical calculation chip for converting the fluorescence signal into an oxygen concentration electrical signal; the communication display module is used for converting the oxygen concentration electric signal into an oxygen concentration digital signal and storing and displaying the oxygen concentration digital signal; the output end of the light source module is connected with the input end of the communication display module through the optical fiber sensing module and the optical calculation chip in sequence. By arranging the optical calculation chip in the fluorescent oxygen sensor system, the utility model not only can rapidly respond to measurement and improve the measurement accuracy of oxygen concentration, but also can reduce power consumption and cost, and is more convenient for integrated design, manufacture and application.
Description
Technical Field
The utility model relates to the technical field of sensor design, in particular to a fluorescent oxygen sensing system based on an optical computing chip.
Background
The oxygen sensor is a sensor widely applied to the fields of industrial production, medical treatment, environmental monitoring and the like. The high-precision oxygen concentration monitoring technology can effectively help people to improve production efficiency, ensure product quality, ensure accuracy and safety of life science experiments and the like. Therefore, the oxygen concentration sensing technology with high precision and high stability has wide application prospect. Oxygen sensors can be classified into various types according to different measurement principles and application scenarios, and commonly include fluorescent oxygen sensors and electrochemical oxygen sensors. The electrochemical oxygen sensor detects the oxygen content by utilizing an oxidation-reduction reaction mechanism, has the characteristics of high reaction speed, high accuracy and the like, but has the problems of needing to calibrate and replace electrodes regularly and the like. The principle of the fluorescent oxygen sensor is to measure the oxygen concentration by detecting the fluorescence intensity by using the photochemical reaction between the fluorescent probe and oxygen. The fluorescent substance on the oxygen-sensitive film changes from the ground state to the excited state after being irradiated with the excitation light. While fluorescent materials are generally unstable in the excited state, they need to release energy back to the ground state to fluoresce, a phenomenon known as photoluminescence. Meanwhile, when oxygen exists in the environment, the fluorescent substance in an excited state or a ground state reacts with oxygen to cause quenching of fluorescence intensity, which is called fluorescence quenching. The fluorescence intensity decays with increasing oxygen concentration, and the fluorescence lifetime also shortens. The linear relationship of fluorescence intensity to oxygen concentration can be described by the ston-walmer equation (1): i0=1+k [ q ], wherein I0 is the fluorescence intensity in the absence of oxygen; i is the fluorescence intensity in the presence of oxygen; k is the Ten-Walmer constant; q is the concentration of oxygen. Accordingly, the corresponding oxygen concentration can be obtained by measuring the fluorescence intensity based on the linear relationship between the fluorescence intensity and the oxygen concentration. Compared with the traditional electrochemical oxygen sensor, the fluorescent oxygen sensor has the advantages of simple operation, long service life, high precision and the like. In addition, problems such as drift and noise which may exist in the electrochemical sensor can be avoided. However, there are also some obvious disadvantages such as high power consumption, large size, signal interference, and high cost of the sensor.
A fluorescent oxygen sensor as disclosed in patent document CN103278489B, comprising a housing having an inner cavity, and a main circuit board, a photoelectric element, a light source element and a photosensitive element mounted in the inner cavity of the housing; the shell is provided with a plurality of gas diffusion holes for gas to enter the inner cavity; the photoelectric element and the light source element are respectively and electrically connected with the main circuit board; the photosensitive element comprises a substrate and an oxygen fluorescence sensitive luminescent layer formed on the substrate by an oxygen fluorescence sensitive luminescent material; the photosensitive element is arranged on the light path of the light source element towards the light source element by the oxygen fluorescence sensitive luminous layer, the light emitted by the light source element excites the oxygen fluorescence sensitive luminous layer of the photosensitive element to generate fluorescence, the fluorescence is transmitted to the photoelectric element through the substrate, and the photoelectric element receives the fluorescence to generate corresponding electric signals. The utility model has high sensitivity, wide linear range and good stability, and can realize real-time measurement of oxygen in the environment. The collected fluorescence intensity is converted into a corresponding electric signal through the photoelectric device, and the main circuit board is utilized to process data of the fluorescence electric signal. However, the fluorescent signal of the patent needs to be converted into an electric signal for processing after a long transmission distance, and the fluorescent signal is easy to interfere and quench in the transmission process.
The optical computing chip is a computing chip designed and manufactured based on the principle of photonics and is used for replacing the traditional electronic computing chip. In an optical computing chip, information is converted into optical signals. The optical signal is transmitted through the optical transmission line, and then the calculation module processes the optical signal. Compared with the traditional electronic computing chip, the optical computing chip has the advantages of higher operation speed, lower energy consumption, higher safety, better anti-interference performance and reliability. By combining the fluorescent oxygen sensor with the optical computing chip, the whole volume, power consumption and cost can be reduced, and the response speed and sensitivity in the measuring process can be improved. At present, a fluorescent oxygen sensor scheme for transmitting the fluorescent intensity into an optical computing chip in the form of an optical signal to obtain a corresponding oxygen concentration optical signal is not available. Therefore, how to realize oxygen concentration detection based on the optical computing chip is a problem to be solved in the industry.
Therefore, there is a need to develop a fluorescent oxygen sensing system based on optical computing chips.
Disclosure of Invention
The utility model aims to provide a fluorescent oxygen sensing system based on an optical computing chip, which is used for solving the problems of long response time, large volume, high power consumption, poor sensitivity and high cost of an oxygen sensor in the prior art.
In order to achieve the above object, the present utility model adopts the following technical scheme: a fluorescent oxygen sensing system based on a light-computing chip, comprising:
a light source module for outputting excitation light;
the optical fiber sensing module is used for receiving the excitation light and generating a corresponding fluorescent signal under the action of the excitation light;
an optical calculation chip for converting the fluorescence signal into an oxygen concentration electrical signal;
the communication display module is used for converting the oxygen concentration electric signal into an oxygen concentration digital signal and storing and displaying the oxygen concentration digital signal;
the output end of the light source module is connected with the input end of the communication display module through the optical fiber sensing module and the optical calculation chip in sequence.
By arranging the optical calculation chip inside the fluorescent oxygen sensor system, the measurement accuracy, sensitivity and response speed of the oxygen concentration can be improved, and the power consumption, the volume and the cost can be reduced. And the integrated design, manufacture and application are convenient.
Further, the optical computing chip includes:
a coupling unit for coupling the received fluorescent signal to the inside of the optical computing chip;
a first transmission unit for transmitting the fluorescent signal outputted from the coupling unit;
the calculating unit is used for receiving the fluorescent signal output by the first transmission unit and analyzing and processing the fluorescent signal to obtain a corresponding oxygen concentration optical signal;
the second transmission unit is used for transmitting the oxygen concentration optical signal output by the calculation unit;
and a photoelectric conversion unit for converting the oxygen concentration optical signal output by the second transmission unit into an oxygen concentration electrical signal;
the coupling unit is connected with the photoelectric conversion unit through the first transmission unit, the calculation unit and the second transmission unit in sequence.
Further, the optical fiber sensing module includes:
glass beads for condensing the excitation light;
an optical fiber for transmitting the condensed excitation light;
and an oxygen sensitive film for receiving the excitation light and generating a corresponding fluorescence signal under the excitation light;
wherein, glass ball and oxygen sensitive film locate the head end and the terminal of optic fibre respectively.
Further, the communication display module includes:
the analog-to-digital conversion unit is used for converting the oxygen concentration electric signal into an oxygen concentration digital signal;
a communication unit for transmitting the oxygen concentration digital signal;
a display unit for displaying the received oxygen concentration digital signal;
and a storage unit for storing the received oxygen concentration digital signal;
the output end of the analog-to-digital conversion unit is connected with the input end of the communication unit, and the output end of the communication unit is respectively connected with the input ends of the display unit and the storage unit.
Further, the first transmission unit and the second transmission unit each include an optical waveguide.
Further, the width of the optical waveguide is 300 nm-1000 nm, and the height is 20 nm-1000 nm.
Further, the optical fiber adopts a single mode optical fiber. The purpose of this is to increase the sensitivity of the fluorescent oxygen sensor system.
The utility model has the beneficial effects that: the fluorescent oxygen sensing system comprises a light source module, an optical fiber sensing module, an optical computing chip and a communication display module which are sequentially connected. Firstly, excitation light is generated through a light source module, and the optical fiber sensing module generates fluorescence under the action of the excitation light; and then the light calculation chip transmits and processes the fluorescence and converts the fluorescence into a corresponding oxygen concentration electric signal, and finally the fluorescence is stored and displayed through the communication display module. The fluorescent oxygen sensing system provided by the utility model is used for processing the fluorescent signals by adopting the optical calculation chip, and compared with the traditional electric calculation mode, the fluorescent oxygen sensing system can rapidly respond to measurement and improve the measurement accuracy of the oxygen concentration. In addition, the optical computing chip has the advantages of small size and high integration level. Therefore, the power consumption and the cost can be reduced, the integrated design is convenient, and the manufacture and the application are convenient.
Drawings
FIG. 1 is a schematic block diagram of a fluorescent oxygen sensor system in this embodiment;
FIG. 2 is a schematic block diagram of an optical computing chip in the present embodiment;
fig. 3 is a schematic block diagram of a communication display module in the present embodiment.
Wherein:
the system comprises a 1-light source module, a 2-optical fiber sensing module, a 3-optical computing chip and a 4-communication display module;
31-a coupling unit, 32-a first transmission unit, 33-a calculation unit, 34-a second transmission unit, 35-a photoelectric conversion unit;
41-analog-to-digital conversion unit, 42-communication unit, 43-display unit, 44-storage unit.
Detailed Description
Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Referring to fig. 1, in this embodiment, a fluorescent oxygen sensor system based on an optical computing chip includes: the device comprises a light source module 1 for outputting excitation light, an optical fiber sensing module 2 for receiving the excitation light and generating corresponding fluorescent signals under the action of the excitation light, a light calculation chip 3 for converting the fluorescent signals into oxygen concentration electric signals, and a communication display module 4 for converting the oxygen concentration electric signals into oxygen concentration digital signals and storing and displaying the oxygen concentration digital signals. The connection relation of the modules is as follows: the output end of the light source module 1 is connected with the input end of the communication display module 4 through the optical fiber sensing module 2 and the optical calculation chip 3 in sequence.
In this embodiment, by arranging the optical calculation chip 3 inside the fluorescent oxygen sensor system, not only the oxygen concentration can be measured in a quick response manner, but also the measurement accuracy of the oxygen concentration can be improved. In addition, the optical calculation chip has the characteristics of small volume and high integration level. Therefore, the utility model can reduce the power consumption and the cost, is convenient for integrated design and manufacturing and application.
With continued reference to fig. 3, in the present embodiment, the optical computing chip 3 includes: the optical calculation chip 3 comprises a coupling unit 31 for coupling the received fluorescent signal to the inside of the optical calculation chip 3, a first transmission unit 32 for transmitting the fluorescent signal output by the coupling unit 31, a calculation unit 33 for receiving the fluorescent signal output by the first transmission unit 32 and analyzing and processing the fluorescent signal to obtain a corresponding oxygen concentration optical signal, a second transmission unit 34 for transmitting the oxygen concentration optical signal output by the calculation unit 33, and a photoelectric conversion unit 35 for converting the oxygen concentration optical signal output by the second transmission unit 34 into an oxygen concentration electrical signal. The connection relation of the above units is as follows: the coupling unit 31 is connected to the photoelectric conversion unit 35 via the first transmission unit 32, the calculation unit 33, and the second transmission unit 34 in this order.
Preferably, the optical computing chip 3 is fabricated using a 220nm SOI process.
Preferably, the first transmission unit 32 and the second transmission unit 34 each include an optical waveguide. Wherein the width of the optical waveguide is 300 nm-1000 nm, and the height is 20 nm-1000 nm.
The core of the calculation unit 33 is a mach-zehnder interferometer. The principle is that the refractive index of waveguide fiber is changed by adding electric fields at two sides of waveguide, so as to regulate light wave, and 8-10 phase shifters are generally used for controlling phase transformation of a section of waveguide. The optical computing chip 3 comprises a plurality of programmable Mach-Zehnder interferometers, and the weighted delay of signals is realized by utilizing the thermo-optical effect. Here, a detailed description is not to be taken as a matter of common general knowledge of a person skilled in the art.
In this embodiment, the optical calculation chip 3 transmits and processes the fluorescent signal transmitted from the optical fiber in the optical fiber sensing module 2 to obtain a corresponding oxygen concentration optical signal, and converts the oxygen concentration optical signal into an oxygen concentration electrical signal for output. This can improve the accuracy of measuring the oxygen concentration. Second, the present embodiment consumes less power than electrical computing. In addition, the optical calculation chip has the characteristics of small volume and high integration level. Therefore, the preparation cost of the fluorescent oxygen sensor system can be effectively reduced, and the integrated design, convenient manufacture and application can be performed.
In this embodiment, the optical fiber sensing module 2 includes: the glass ball beads are used for condensing the excitation light, the optical fibers are used for transmitting the condensed excitation light, and the oxygen sensitive films are used for receiving the excitation light and generating corresponding fluorescent signals under the action of the excitation light. Wherein, glass ball and oxygen sensitive film locate the head end and the terminal of optic fibre respectively.
The specific working principle is as follows: first, the excitation light generated by the light source module 1 is guided into the optical fiber by the condensing action of the glass beads. And secondly, the optical fiber transmits the excitation light to the oxygen sensitive film, and fluorescent substances on the oxygen sensitive film are excited by the excitation light to generate photoluminescence reaction. And simultaneously, fluorescent substances on the oxygen sensitive film absorb oxygen in the measured environment and perform oxidation-reduction reaction with the oxygen, and the fluorescence signal intensity is changed. Finally, the fluorescent signal changed after the reaction between the fluorescent substance and oxygen is transmitted to the optical calculation chip 3 for processing.
Preferably, the optical fiber is a single mode optical fiber. The purpose of this is to increase the sensitivity of the fluorescent oxygen sensor system.
In one embodiment, the optical fiber may be cut, ground, and polished to enable the surfaces at both ends of the optical fiber to be flat. Preferably, the core diameter is between 1 μm and 20 μm in size.
In this embodiment, the optical fiber sensing module 2 can convert the excitation light generated by the light source module 1 into a fluorescent signal and transmit the fluorescent signal to the inside of the optical computing chip 3.
In the present embodiment, the communication display module 4 includes: an analog-to-digital conversion unit 41, a communication unit 42, a display unit 43, and a storage unit 44. The connection relation of the above units is as follows: the output end of the analog-to-digital conversion unit 41 is connected with the input end of the communication unit 42, and the output end of the communication unit 42 is respectively connected with the input ends of the display unit 43 and the storage unit 44. The specific working procedure is as follows:
the analog-to-digital conversion unit 41 converts the oxygen concentration electric signal into an oxygen concentration digital signal, and the communication unit 42 transmits the oxygen concentration digital signal. The display unit 43 and the storage unit 44 display and store the oxygen concentration digital signal, respectively.
In one embodiment, the data may also be transmitted to other devices or systems through the display unit 43 to achieve wider applications and interconnection.
In one embodiment, the storage unit 44 may be one of TF cards, hard disks, optical discs, and external storage products such as U-discs. The display screen of the display unit 43 may be one of a liquid crystal screen LCD, an organic light emitting diode OLED, a quantum dot light emitting diode QLED, or other screens that can display data, using an integrated circuit bus interface.
In this embodiment, the user can intuitively obtain the data of the oxygen concentration through the communication display module 4.
In summary, the fluorescent oxygen sensor system based on the optical computing chip of the present embodiment is adopted. The whole process principle is as follows: the excitation light is first generated by the light source module 1, and then the optical fiber sensing module 2 converts the excitation light into a fluorescent signal. The optical calculation chip 3 transmits the fluorescence signal and converts the fluorescence signal into a corresponding oxygen concentration electric signal, and finally the corresponding oxygen concentration electric signal is stored and displayed through the communication display module 4. Compared with the traditional electrical calculation mode, the fluorescent oxygen sensing system adopts the optical calculation chip 3, and the optical calculation chip 3 has the optical calculation characteristics of high precision and high speed. Therefore, the problems of signal distortion, long response time and insufficient measurement accuracy can be effectively avoided. Next, the fluorescent oxygen sensor system based on the optical calculation chip 3 performs calculation using an optical signal, and has low power consumption compared to electrical calculation. Finally, the optical computing chip 3 has the characteristics of small volume and high integration level, can effectively reduce the whole preparation cost, can carry out integrated design, and is convenient to manufacture and apply.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present utility model may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present utility model.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (7)
1. A fluorescent oxygen sensor system based on an optical computing chip, comprising:
a light source module (1) for outputting excitation light;
the optical fiber sensing module (2) is used for receiving the excitation light and generating a corresponding fluorescence signal under the action of the excitation light;
an optical calculation chip (3) for converting the fluorescence signal into an oxygen concentration electrical signal;
and a communication display module (4) for converting the oxygen concentration electric signal into an oxygen concentration digital signal and storing and displaying the oxygen concentration digital signal;
the output end of the light source module (1) is connected with the input end of the communication display module (4) through the optical fiber sensing module (2) and the optical calculation chip (3) in sequence.
2. The fluorescent oxygen sensor system based on optical computing chips according to claim 1, characterized in that the optical computing chip (3) comprises:
a coupling unit (31) for coupling the received fluorescent signal into the inside of the optical computing chip (3);
a first transmission unit (32) for transmitting the fluorescent signal outputted from the coupling unit (31);
a calculating unit (33) for receiving the fluorescence signal output by the first transmission unit (32) and analyzing the fluorescence signal to obtain a corresponding oxygen concentration optical signal;
a second transmission unit (34) for transmitting the oxygen concentration optical signal outputted from the calculation unit (33);
and a photoelectric conversion unit (35) for converting the oxygen concentration optical signal output from the second transmission unit (34) into an oxygen concentration electrical signal;
the coupling unit (31) is connected with the photoelectric conversion unit (35) through the first transmission unit (32), the calculation unit (33) and the second transmission unit (34) in sequence.
3. The optical computing chip-based fluorescent oxygen sensor system of claim 1, wherein the optical fiber sensing module (2) comprises:
glass beads for condensing the excitation light;
an optical fiber for transmitting the condensed excitation light;
and an oxygen sensitive film for receiving the excitation light and generating a corresponding fluorescence signal under the excitation light;
wherein, glass ball and oxygen sensitive film locate the head end and the terminal of optic fibre respectively.
4. The fluorescent oxygen sensor system based on optical computing chips of claim 1, characterized in that the communication display module (4) comprises:
an analog-to-digital conversion unit (41) for converting the oxygen concentration electric signal into an oxygen concentration digital signal;
a communication unit (42) for transmitting the oxygen concentration digital signal;
a display unit (43) for displaying the received oxygen concentration digital signal;
and a storage unit (44) for storing the received oxygen concentration digital signal;
the output end of the analog-to-digital conversion unit (41) is connected with the input end of the communication unit (42), and the output end of the communication unit (42) is respectively connected with the input ends of the display unit (43) and the storage unit (44).
5. The optical computing chip-based fluorescent oxygen sensor system of claim 2, wherein the first transmission unit (32) and the second transmission unit (34) each comprise an optical waveguide.
6. The optical computing chip-based fluorescent oxygen sensor system of claim 5, wherein the optical waveguide has a width of 300nm to 1000nm and a height of 20nm to 1000nm.
7. The optical computing chip-based fluorescent oxygen sensor system of claim 3, wherein the optical fiber is a single mode fiber.
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