CN110296769B - Optical fiber temperature sensor, measuring system and signal processing method - Google Patents
Optical fiber temperature sensor, measuring system and signal processing method Download PDFInfo
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- CN110296769B CN110296769B CN201910623553.5A CN201910623553A CN110296769B CN 110296769 B CN110296769 B CN 110296769B CN 201910623553 A CN201910623553 A CN 201910623553A CN 110296769 B CN110296769 B CN 110296769B
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
- G01K11/3213—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering using changes in luminescence, e.g. at the distal end of the fibres
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Abstract
The invention discloses an optical fiber temperature sensor, a measuring system and a signal processing method, wherein the optical fiber temperature sensor comprises two crystal optical fibers which are welded together, so that light energy is input into a reflecting surface from one optical fiber and output from the other optical fiber, the outer surfaces of the two crystal optical fibers are coated with an improved polymer temperature-sensitive material layer, and the improved polymer temperature-sensitive material layer is wrapped with a polyester protective layer. The optical fiber temperature sensor, the measuring system and the signal processing method can improve the photoelectric conversion processing of the photoelectric detector to enable the photoelectric detector to capture low-light-level signals, well achieve the aim of enabling the photoelectric detector to measure more accurately by utilizing the optical signal gain processing method, achieve the purpose of enabling the optical fiber temperature sensor to be wider in use range, and ensure good detection precision even if the optical signals received by the photoelectric detector are weaker.
Description
Technical Field
The invention relates to the technical field of sensor measurement, in particular to an optical fiber temperature sensor, a measurement system and a signal processing method.
Background
The optical fiber temperature sensor analyzes the spectrum transmitted by the optical fiber to know the real-time temperature by utilizing the principle that the spectrum absorbed by partial substances changes along with the temperature change, has the physical essence that the characteristic parameters of the light wave transmitted in the optical fiber, such as amplitude, phase, polarization state, wavelength, mode and the like, have sensitivity characteristics to external environmental factors, such as temperature, pressure, radiation and the like, belongs to non-contact temperature measurement, has a plurality of types, but can be divided into a functional type and a transmission type according to the working principle in summary, the functional type optical fiber temperature sensor performs temperature measurement by utilizing the characteristic that various characteristics (phase, polarization, intensity and the like) of the optical fiber change along with the temperature, the sensor has the characteristic of integrating sensing and sensing, but also increases the difficulty of sensitivity enhancement and desensitization, and the optical fiber of the transmission type optical fiber temperature sensor only plays the role of optical signal transmission, the modulation function of the object to be measured is realized by sensitive elements with other physical properties by avoiding the complex environment of a temperature measurement area, and the sensor increases the complexity of the system due to the problem of optical coupling between the optical fiber and the sensing head and is sensitive to interference such as mechanical vibration.
Present optical fiber temperature sensor is when using, receive and photoelectric conversion through photoelectric detector directly mostly, however, such photoelectric detector can only be applied to some not turbid gas or colloid that await measuring, and to some detect the environment in bad or some comparatively turbid gas or colloid measuring environment, the light signal that ordinary photoelectric detector received is more weak, thereby lead to detecting precision greatly reduced, can not realize improving photoelectric conversion processing of photoelectric detector, make photoelectric detector can catch shimmer signal, can't reach through utilizing optical signal gain processing method, make photoelectric detector can more accurate measuring purpose, can not realize making the scope of optical fiber temperature sensor use more extensive, thereby bring very big inconvenience for optical fiber temperature sensor's use.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an optical fiber temperature sensor, a measuring system and a signal processing method, which solve the problems that the existing photoelectric detector can only be applied to some non-turbid gas or colloid to be measured, and for some severe detection environments or some turbid gas or colloid measurement environments, the optical signal received by the ordinary photoelectric detector is weak, so that the detection precision is greatly reduced, the photoelectric conversion processing of the photoelectric detector cannot be improved, so that the photoelectric detector can capture the dim-light signal, the purpose that the photoelectric detector can measure more accurately by using an optical signal gain processing method cannot be achieved, and the application range of the optical fiber temperature sensor cannot be widened.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an optical fiber temperature sensor, includes two fusion splice crystal optic fibre together, makes light energy import this plane of reflection from an optic fibre and exports another optic fibre, two the surface coating of crystal optic fibre has improvement type polymer temperature sensing material layer, and improvement type polymer temperature sensing material layer parcel has the polyester inoxidizing coating.
Preferably, the two crystal fibers are quartz fibers treated by the high-purification treatment process, and the content of metal impurities such as iron, copper and chromium in the quartz fibers is reduced to be within the range of 0.01-0.02%.
Preferably, the preparation method of the improved polymer temperature-sensitive material layer comprises the steps of dissolving the crosslinking agent BIS and the monomer NIPA in deionized water in a molar ratio of 1-4%, stirring, adding the initiator ammonium persulfate and the accelerator sodium metabisulfite after the crosslinking agent BIS and the monomer NIPA are completely dissolved, pouring the mixture into a glass mold, carrying out the whole process under the protection of nitrogen, washing after gel is formed, soaking with high-temperature water, changing water every 12 hours for 1 time, and drying the treated hydrogel after 3 days to obtain the improved polymer temperature-sensitive material layer.
The invention also discloses a measuring system of the optical fiber temperature sensor, which comprises a central processing module, an optical fiber sensing head and a light-emitting source unit, wherein the output end of the central processing module is respectively connected with the input ends of the optical fiber sensing head and the light-emitting source unit, the central processing module is in bidirectional connection with a light source driving unit, the output end of the light source driving unit is connected with the input end of the light-emitting source unit, the output end of the central processing module is connected with the input end of a photoelectric detector, the input end of the photoelectric detector is connected with the output end of a photoelectric gain processing unit, and the photoelectric gain processing unit is in bidirectional connection with the central processing module.
Preferably, the light source driving unit includes a light source starting module, a light source starting testing module and a light emitting power detecting module, an output end of the light source starting module is connected with an input end of the light source starting testing module, and an output end of the light source starting testing module is connected with an input end of the light emitting power detecting module.
Preferably, the photoelectric gain processing unit comprises a photocathode primary impact layer module, a photoelectron electric field acceleration module, a photocathode secondary impact layer module, a multiplication point and pulse detection module and a gain pulse current analysis module, wherein the output end of the photocathode primary impact layer module is connected with the input end of the photoelectron electric field acceleration module, the output end of the photoelectron electric field acceleration module is connected with the input end of the photocathode secondary impact layer module, the output end of the photocathode secondary impact layer module is connected with the input end of the multiplication charge pulse detection module, and the output end of the multiplication charge pulse detection module is connected with the input end of the gain pulse current analysis module.
Preferably, the output end of the central processing module is connected with the input end of the filtering anti-interference module, and the output end of the filtering anti-interference module is connected with the input end of the photoelectric detector.
Preferably, the output end of the central processing module is respectively connected with the input ends of the display unit, the fluorescence information processing module and the radiation signal processing module.
Preferably, the central processing module is in bidirectional connection with the modulator, and the modulator is in bidirectional connection with the human-computer interaction unit.
The invention also discloses a signal processing method of the optical fiber temperature sensor, which specifically comprises the following steps:
s1, firstly, installing the optical fiber temperature sensor at a corresponding position to be detected, and then electrifying and starting the whole measuring system;
s2, the central processing module controls a light source starting module in the light source driving unit to start the light source, then the light source starting test module tests the starting work of the light source, if the test is successful, the light source emits light normally, and then the light emitting power detection module detects the light emitting power of the light source in real time;
s3, the optical fiber sensing head can send light from the light source unit into the modulator through the optical fiber, and the optical property of the light is changed after the interaction between the temperature of the parameter to be measured and the light entering the modulation area, so as to obtain modulated signal light;
s4, the signal light modulated in the step S3 is sent into a photoelectric detector through an optical fiber, at the moment, a photocathode primary impact layer module in a hang-up point gain processing unit firstly performs photon impact on a material layer to generate multi-level electrons, then the charges are accelerated by a photoelectron electric field acceleration module and then impacted again by a photocathode secondary impact layer module to generate more photoelectrons in geometric grades, then the photoelectrons are rectified and detected by a multiplication point and pulse detection module, then the photoelectrons are analyzed by a gain pulse current analysis module, and meanwhile, the anti-interference protection of the electric signal is performed by a filtering anti-interference module;
and S5, the electric signal after gain demodulation is respectively transmitted to the fluorescence signal processing module and the radiation signal processing module through the central processing module for analysis and processing, so that the measured parameters are obtained and displayed on the display unit, and a detector can interact with the whole measuring system through the human-computer interaction unit.
In the low temperature region below 400 deg.c, the radiation signal is weak, the system starts the LED to make the fluorescence temperature measuring system work, the LED emits modulated exciting light, the light is coupled to the branch end of the Y-shaped optical fiber via the collecting lens, the Y-shaped optical fiber is coupled to the optical fiber temperature sensing head via the optical fiber coupler, the end of the optical fiber sensing head is excited by the exciting light to emit fluorescence, the fluorescence signal is led out via the optical fiber and emitted from the other branch end of the Y-shaped optical fiber via the optical fiber coupler, the fluorescence signal is received by the photoelectric detector, the light signal output by the photoelectric detector is amplified and processed by the fluorescence signal processing system to calculate the fluorescence life and obtain the measured temperature value, and in the high temperature region above 400 deg.c, the radiation signal is strong enough, the radiation temperature measuring system works, the LED is closed, the radiation signal is output via sapphire optical fiber and Y-shaped optical fiber, and converted into electric signal by the detector, the system calculates the measured temperature by detecting the radiation signal intensity.
(III) advantageous effects
The invention provides an optical fiber temperature sensor, a measuring system and a signal processing method. Compared with the prior art, the method has the following beneficial effects:
(1) the optical fiber temperature sensor, the optical fiber sensing head and the light-emitting source unit are included, the output end of the central processing module is respectively connected with the input ends of the optical fiber sensing head and the light-emitting source unit, the central processing module is bidirectionally connected with the light source driving unit, the output end of the light source driving unit is connected with the input end of the light-emitting source unit, the output end of the central processing module is connected with the input end of the photoelectric detector, the input end of the photoelectric detector is connected with the output end of the photoelectric gain processing unit, the photoelectric gain processing unit is bidirectionally connected with the central processing module, the photoelectric conversion processing of the photoelectric detector can be improved, so that the photoelectric detector can capture dim light signals, and the purpose of more accurately measuring the photoelectric detector by utilizing the optical signal gain processing method is well achieved, the optical fiber temperature sensor has the advantages that the optical fiber temperature sensor is wider in use range, the photoelectric detector can be applied to some non-turbid gases or colloids to be detected, the photoelectric detector can be applied to severe detection environments or some turbid gas or colloid measurement environments, even if the optical signal received by the photoelectric detector is weak, the good detection precision can be guaranteed, and the optical fiber temperature sensor is greatly convenient to use.
(2) The optical fiber temperature sensor, the optical fiber measuring system and the signal processing method are characterized in that two crystal optical fibers which are welded together are included, so that light energy is input into the reflecting surface from one optical fiber and output from the other optical fiber, the outer surfaces of the two crystal optical fibers are coated with an improved polymer temperature-sensitive material layer, the improved polymer temperature-sensitive material layer is wrapped with a polyester protective layer, the two crystal optical fibers are quartz optical fibers which are processed by a high-purification treatment process, the metal impurity content of iron, copper and chromium in the quartz optical fibers is reduced to be within the range of 0.01-0.02%, the preparation method of the improved polymer temperature-sensitive material layer is that a cross-linking agent BIS and a monomer NIPA with the molar ratio of 1-4% are dissolved in deionized water, stirring is carried out, after all the metal impurity content is dissolved, an initiator ammonium persulfate and an accelerator sodium pyrosulfite are added, the whole process of pouring into a glass mold is carried out under the protection of nitrogen, after the gel is formed, washing with water, soaking with high-temperature water, changing water every 12 hours for 1 time, and drying the treated hydrogel after 3 days to obtain the improved polymer temperature-sensitive material layer.
(3) The optical fiber temperature sensor, the optical fiber temperature measuring system and the signal processing method specifically comprise the following steps: s1, firstly, installing the optical fiber temperature sensor at the corresponding position to be detected, then electrifying and starting the whole measuring system, S2, the central processing module can control the light source starting module in the light source driving unit to start the light source, then the light source starting test module is used for testing the starting work of the light source, if the test is successful, the light source normally emits light, then the light emitting power detection module detects the light emitting power of the light source in real time, S3, the optical fiber sensing head can send the light from the light source unit into the modulator through the optical fiber, the optical property of the light is changed after the interaction between the temperature of the parameter to be tested and the light entering the modulation area, thereby the modulated signal light is obtained, S4, the modulated signal light in the step S3 is sent into the photoelectric detector through the optical fiber, at this time, the photo cathode primary impact layer module in the hanging point gain processing unit firstly performs photon impact on the material layer, generating multi-level electrons, accelerating the charges through a photoelectron electric field acceleration module, impacting again through a photocathode secondary impact layer module to generate more photoelectrons with geometric grades, rectifying and detecting the photoelectron charges through a multiplication point and pulse detection module, analyzing through a gain pulse current analysis module, simultaneously performing electric signal anti-interference protection through a filtering anti-interference module, S5, respectively transmitting the electric signals after gain demodulation to a fluorescent signal processing module and a radiation signal processing module through a central processing module for analysis processing, thereby obtaining measured parameters, displaying on a display unit, interacting with the whole measuring system through a human-computer interaction unit by a detection person, realizing good processing of optical signals, having simple method, only needing to perform micro-light gain processing before performing photoelectric conversion on a photoelectric detector, temperature measurement can be completed in a low-light-level environment, so that the optical fiber temperature sensor is greatly convenient to use.
Drawings
FIG. 1 is a cross-sectional view of a crystal fiber structure of an optical fiber temperature sensor according to the present invention;
FIG. 2 is a schematic block diagram of the structure of the measurement system of the present invention;
fig. 3 is a schematic block diagram of the structure of the optical-electrical gain processing unit of the present invention.
In the figure, 1 crystal optical fiber, 2 improved type polymer temperature-sensitive material layer, 3 polyester protective layer, 4 central processing module, 5 optical fiber sensing head, 6 luminous light source unit, 7 light source driving unit, 71 light source starting module, 72 light source starting test module, 73 luminous power detection module, 8 photoelectric detector, 9 photoelectric gain processing unit, 91 photocathode primary impact layer module, 92 photoelectron electric field acceleration module, 93 photocathode secondary impact layer module, 94 multiplication point and pulse detection module, 95 gain pulse current analysis module, 10 filtering anti-interference module, 11 display unit, 12 fluorescence information processing module, 13 radiation signal processing module, 14 modulator, 15 man-machine interaction unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention provides a technical solution: an optical fiber temperature sensor comprises two crystal optical fibers 1 which are welded together, so that light energy is input into a reflecting surface from one optical fiber and output from the other optical fiber, the outer surfaces of the two crystal optical fibers 1 are coated with an improved polymer temperature-sensitive material layer 2, the improved polymer temperature-sensitive material layer 2 is wrapped with a polyester protective layer 3, the two crystal optical fibers 1 are quartz optical fibers processed by a high purification treatment process, the content of metal impurities of iron, copper and chromium in the quartz optical fibers is reduced to be within the range of 0.01-0.02%, the preparation method of the improved polymer temperature-sensitive material layer 2 is that a cross-linking agent BIS and a monomer NIPA with the molar ratio of 1-4% are dissolved in deionized water, stirring is carried out, after the complete dissolution, an initiator ammonium persulfate and an accelerator sodium pyrosulfite are added, the whole process of pouring into a glass mold is carried out under the protection of nitrogen, after gel is formed, washing with water, soaking with high-temperature water, changing water every 12 hours for 1 time, and drying the treated hydrogel after 3 days to obtain the improved polymer temperature-sensitive material layer 2.
The invention also discloses a measuring system of the optical fiber temperature sensor, which comprises a central processing module 4, an optical fiber sensing head 5 and a luminous light source unit 6, wherein the output end of the central processing module 4 is respectively connected with the input ends of the optical fiber sensing head 5 and the luminous light source unit 6, the central processing module 4 is in bidirectional connection with a light source driving unit 7, the output end of the light source driving unit 7 is connected with the input end of the luminous light source unit 6, the output end of the central processing module 4 is connected with the input end of a photoelectric detector 8, the input end of the photoelectric detector 8 is connected with the output end of a photoelectric gain processing unit 9, the photoelectric gain processing unit 9 is in bidirectional connection with the central processing module 4, the light source driving unit 7 comprises a light source starting module 71, a light source starting test module 72 and a luminous power test module 73, the output end of the light source starting module 71 is connected with the input end of the light source starting test module 72, the output end of the light source starting test module 72 is connected with the input end of the luminous power detection module 73, the photoelectric gain processing unit 9 comprises a photocathode primary impact layer module 91, a photoelectron electric field acceleration module 92, a photocathode secondary impact layer module 93, a multiplication point and pulse detection module 94 and a gain pulse current analysis module 95, the output end of the photocathode primary impact layer module 91 is connected with the input end of the photoelectron electric field acceleration module 92, the output end of the photoelectron electric field acceleration module 92 is connected with the input end of the photocathode secondary impact layer module 93, the output end of the photocathode secondary impact layer module 93 is connected with the input end of the multiplied charge pulse detection module 94, the output end of the multiplied charge pulse detection module 94 is connected with the input end of the gain pulse current analysis module 95, the output end of the central processing module 4 is connected with the input end of the filtering anti-interference module 10, the output end of the filtering anti-interference module 10 is connected with the input end of the photoelectric detector 8, the output end of the central processing module 4 is respectively connected with the input ends of the display unit 11, the fluorescence information processing module 12 and the radiation signal processing module 13, the central processing module 4 is in bidirectional connection with the modulator 14, and the modulator 14 is in bidirectional connection with the human-computer interaction unit 15.
The invention also discloses a signal processing method of the optical fiber temperature sensor, which specifically comprises the following steps:
s1, firstly, installing the optical fiber temperature sensor at a corresponding position to be detected, and then electrifying and starting the whole measuring system;
s2, the central processing module 4 controls the light source start module 71 in the light source driving unit 7 to start the light source, then the light source start test module 72 tests the start of the light source, if the test is successful, the light source emits light normally, and then the light emitting power detection module 73 detects the light emitting power of the light source in real time;
s3, the optical fiber sensing head 5 can send the light from the light source unit 6 into the modulator 14 through the optical fiber, and the optical property of the light is changed after the interaction between the temperature of the parameter to be measured and the light entering the modulation area, so as to obtain the modulated signal light;
s4, the modulated signal light of step S3 is sent into the photodetector 8 through an optical fiber, at this time, the photocathode primary impact layer module 91 in the floating point gain processing unit 9 first performs photon impact on the material layer to generate multi-level electrons, then the charges are accelerated by the photoelectron electric field acceleration module 92, and then are impacted again by the photocathode secondary impact layer module 93 to generate more photoelectrons of geometric grade, and then the photoelectron charges are rectified and detected by the multiplication point and pulse detection module 94, and then analyzed by the gain pulse current analysis module 95, and simultaneously the anti-interference protection of the electric signal is performed by the filtering anti-interference module 10;
s5, the electric signal after gain demodulation is respectively transmitted to the fluorescence signal processing module 12 and the radiation signal processing module 13 through the central processing module 4 for analysis and processing, so as to obtain the measured parameters, and the measured parameters are displayed on the display unit 11, and the detection personnel can interact with the whole measuring system through the man-machine interaction unit 15.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A signal processing method based on a fiber temperature sensor measuring system is characterized in that,
the measurement system includes:
the optical fiber structure for the photoelectric detector in the optical fiber temperature sensor comprises two crystal optical fibers (1) which are welded together, so that light energy is input from one optical fiber to a reflecting surface and output from the other optical fiber, an improved polymer temperature-sensitive material layer (2) is coated on the outer surfaces of the two crystal optical fibers (1), and a polyester protective layer (3) is wrapped on the improved polymer temperature-sensitive material layer (2);
dissolving a crosslinking agent BIS and a monomer NIPA in deionized water at a molar ratio of 1-4%, stirring, adding an initiator ammonium persulfate and an accelerator sodium metabisulfite after all the components are dissolved, pouring the mixture into a glass mold, performing the whole process under the protection of nitrogen, after gel is formed, washing with water, soaking with high-temperature water, changing the water every 12 hours for 1 time, and drying the treated hydrogel after 3 days to obtain the improved polymer temperature-sensitive material layer (2);
including central processing module (4), optic fibre sensing head (5) and luminous light source unit (6), the output of central processing module (4) is connected with the input of optic fibre sensing head (5) and luminous light source unit (6) respectively, its characterized in that: the central processing module (4) is in bidirectional connection with the light source driving unit (7), the output end of the light source driving unit (7) is connected with the input end of the light-emitting light source unit (6), the output end of the central processing module (4) is connected with the input end of the photoelectric detector (8), the input end of the photoelectric detector (8) is connected with the output end of the photoelectric gain processing unit (9), and the photoelectric gain processing unit (9) is in bidirectional connection with the central processing module (4);
the signal processing method of the optical fiber temperature sensor specifically comprises the following steps:
s1, firstly, installing the optical fiber temperature sensor at a corresponding position to be detected, and then electrifying and starting the whole measuring system;
s2, the central processing module (4) controls a light source starting module (71) in the light source driving unit (7) to start the light source, then the light source starting test module (72) tests the starting work of the light source, if the test is successful, the light source emits light normally, and then the light emitting power detection module (73) detects the light emitting power of the light source in real time;
s3, the optical fiber sensing head (5) can send light from the light source unit (6) into the modulator (14) through the optical fiber, and after the temperature of the parameter to be measured interacts with the light entering the modulation area, the optical property of the light is changed, so that the modulated signal light is obtained;
s4, the signal light modulated in the step S3 is sent into a photoelectric detector (8) through an optical fiber, at the moment, a photocathode primary impact layer module (91) in a hang-on point gain processing unit (9) firstly strikes a material layer by photons to generate multi-level electrons, then the charges are accelerated by a photoelectron electric field acceleration module (92), and then the charges are impacted again by a photocathode secondary impact layer module (93) to generate more photoelectrons with geometric grades, then the photoelectrons are rectified and detected by a multiplication point and pulse detection module (94), then the photoelectrons are analyzed by a gain pulse current analysis module (95), and meanwhile, the electric signal anti-interference protection is carried out by a filtering anti-interference module (10);
s5, the electric signals after gain demodulation are respectively transmitted to a fluorescence signal processing module (12) and a radiation signal processing module (13) through a central processing module (4) for analysis and processing, so that the measured parameters are obtained and displayed on a display unit (11), and a detector can interact with the whole measuring system through a human-computer interaction unit (15);
photoelectric gain processing unit (9) are including photocathode primary impact layer module (91), photoelectron electric field acceleration module (92), photocathode secondary impact layer module (93), multiplication point and pulse detection module (94) and gain pulse current analysis module (95), the output and the input of photoelectron electric field acceleration module (92) of photocathode primary impact layer module (91) are connected, and the output of photoelectron electric field acceleration module (92) is connected with the input of photocathode secondary impact layer module (93), the output and the input of multiplication charge pulse detection module (94) of photocathode secondary impact layer module (93) are connected, and the output of multiplication charge pulse detection module (94) is connected with the input of gain pulse current analysis module (95).
2. The signal processing method based on the optical fiber temperature sensor measurement system according to claim 1, wherein: the two crystal fibers (1) are quartz fibers treated by a high-purification treatment process, and the content of metal impurities such as iron, copper and chromium in the quartz fibers is reduced to be within the range of 0.01-0.02%.
3. The signal processing method based on the optical fiber temperature sensor measuring system according to claim 1, characterized in that: the light source driving unit (7) comprises a light source starting module (71), a light source starting test module (72) and a luminous power detection module (73), wherein the output end of the light source starting module (71) is connected with the input end of the light source starting test module (72), and the output end of the light source starting test module (72) is connected with the input end of the luminous power detection module (73).
4. The signal processing method based on the optical fiber temperature sensor measuring system according to claim 1, characterized in that: the output end of the central processing module (4) is connected with the input end of the filtering anti-interference module (10), and the output end of the filtering anti-interference module (10) is connected with the input end of the photoelectric detector (8).
5. The signal processing method based on the optical fiber temperature sensor measuring system according to claim 1, characterized in that: the output end of the central processing module (4) is respectively connected with the input ends of the display unit (11), the fluorescence information processing module (12) and the radiation signal processing module (13).
6. The signal processing method based on the optical fiber temperature sensor measuring system according to claim 1, characterized in that: the central processing module (4) is in bidirectional connection with the modulator (14), and the modulator (14) is in bidirectional connection with the human-computer interaction unit (15).
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| CN206387514U (en) * | 2017-01-19 | 2017-08-08 | 合肥市恒新基电子有限公司 | A kind of encapsulating structure of fiber-optical grating temperature sensor |
| CN207751606U (en) * | 2017-12-29 | 2018-08-21 | 长园深瑞继保自动化有限公司 | Reflection-type optical fiber temperature sensor |
| CN108084624B (en) * | 2018-01-05 | 2019-09-27 | 东华大学 | A kind of preparation method having defective Responsive photonic crystals |
| CN109084909A (en) * | 2018-10-21 | 2018-12-25 | 张群 | A kind of fibre optic temperature sensor demodulating system |
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2019
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