CN106153102A - A kind of multiparameter integration fluid sensor based on iraser technology - Google Patents
A kind of multiparameter integration fluid sensor based on iraser technology Download PDFInfo
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- CN106153102A CN106153102A CN201510165738.8A CN201510165738A CN106153102A CN 106153102 A CN106153102 A CN 106153102A CN 201510165738 A CN201510165738 A CN 201510165738A CN 106153102 A CN106153102 A CN 106153102A
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Abstract
The present invention relates to a kind of multiparameter integration fluid sensor based on iraser technology, including light path modulation unit, photoelectric signal transformation unit and signal processing module, light path modulation unit uses the infrared light of semiconductor laser with tunable modulation different wavelength range, is respectively used to temperature survey, granule detection and infrared spectrum analysis through the first beam splitter, the second beam splitter;Infrared measurement of temperature signal is converted to the signal of telecommunication by photodetector by photoelectric signal transformation unit, by photoelectric receiving tube, particle projection signal is converted to the signal of telecommunication, by detector, interference light signal is converted to infrared spectrum information;Signal processing module utilizes amplifying circuit that small electrical signals is amplified conditioning, determines content of material by infrared spectrum relative analysis, and integrates each supplemental characteristic of fluid and use convergence algorithm to carry out logic verify, final output digit signals.The present invention achieves on-line measurement while multiple fluid parameter only with iraser technology by single-sensor structure.
Description
Technical field
The present invention relates to a kind of multiparameter integration fluid sensor based on iraser technology, belong to fluid online diagnosing technique of support shaft field.
Background technology
Quick as one, efficient and eco-friendly analytical technology, NIR Analysis application in petrochemical industry is increasingly by the most attention of people.For a kind of test sample, use NIR Analysis to measure multiple character simultaneously and be then more beneficial for the performance of NIR Analysis feature.
Viscosity index (VI) is to characterize the important parameter of lubricating oil viscosity-temperature performance, also it is one of important quality index in API classification, sets up the rapid analysis method of base oil viscosity index and the production process of lube base oil is controlled and the development of lubricating oil, allotment have important directive significance.Viscosity index (VI) is by measuring 40 e and 100 e viscosity calculations at present, and method is more complicated, and uses NIR Analysis to measure base oil viscosity index the most quickly and easily,
Oil Monitoring Technique by equipment used-oil regular sampling analysis, on the one hand can the quality state of analytical equipment used-oil effectively, instruct and change oil depending on feelings, it is ensured that the proper lubrication of equipment;On the other hand the most then can the state of wear of analysis and judgment equipment and the reason of wear-out failure effectively, instruct condition based maintenance and the maintenance of equipment, it is ensured that equipment safety operation.
Moisture in Lube Oil & content is one of important indicator of oil liquid monitoring.The existence of moisture, oil oxidation can be promoted to go bad, destroy the formation of oil film, make lubricant effect be deteriorated, cause the burn into corrosion of equipment, make oil product easily produce sediment, and additive (especially metallic salt) can be made to occur hydrolysis to lose efficacy, produce precipitation, block oil circuit, hinder circulation and the supply of lubricating oil.Moreover, the moisture of lubricating oil, when using temperature low, owing to making lubricating oil flow be deteriorated close to freezing point, viscosity-temperature characteristics degenerates;And when using temperature height, water can vaporize, not only destroy oil film but also produce vapour lock, affect the circulation of lubricating oil.Infrared spectrum is the new technique obtaining continuous popularization and application in recent years in oil liquid monitoring, it can be from the level of material molecule, according to lubricating oil component Zhong Ge functional group to the appearance of infrared spectrum absorpting peak and change, qualitatively or quantitatively understanding the degree that lubricating oil deterioration is rotten, operating process is the most accurate.Moisture in infrared spectroscopic determination lubricating oil is exactly one of its application.
Summary of the invention
It is an object of the invention to propose a kind of use iraser technology to carry out the integrated transducer that fluid multiparameter detects simultaneously, single-sensor structure can be utilized to measure multiple parameter informations such as the viscosity of fluid, temperature, granularity, acid number, water content simultaneously, and sonde configuration integration, miniaturization, simple installation, speed is fast, precision is high in detection, beneficially the real-time state monitoring of fluid and analysis.
To achieve these goals, technical scheme is as follows.
A kind of multiparameter integration fluid sensor based on iraser technology, including light path modulation unit, photoelectric signal transformation unit and signal processing module, wherein, light path modulation unit is connected with photoelectric signal transformation unit, signal processing module is connected with each other with photoelectric signal transformation unit, light path modulation unit uses the infrared light of semiconductor laser with tunable modulation different wavelength range, is respectively used to temperature survey, granule detection and infrared spectrum analysis through the first beam splitter, the second beam splitter;Infrared measurement of temperature signal is converted to the signal of telecommunication by photodetector by photoelectric signal transformation unit, by photoelectric receiving tube, particle projection signal is converted to the signal of telecommunication, by detector, interference light signal is converted to infrared spectrum information;Signal processing module utilizes amplifying circuit that small electrical signals is amplified conditioning, determines content of material by infrared spectrum relative analysis, and integrates each supplemental characteristic of fluid and use convergence algorithm to carry out logic verify, final output digit signals.
The light path process of said system is that semiconductor laser with tunable sends iraser, and after the first beam splitter, a part of iraser arrives battery of lens, and another part is received by photodetector and photoelectric receiving tube through oil path by the first beam splitter;Iraser through battery of lens continues arrival the second beam splitter that moves ahead, and a part of iraser is reflected by horizontal glass, and another part iraser is detected through oil path by detector;Received by index glass through the part iraser of the second beam splitter and reflect.
According to lambert beer law, the water content parameter of fluid can calculate by measuring H-OH functional group, and acid number parameter can calculate by measuring COOH functional group, and viscosity index (VI) then can calculate by measuring X-H functional group.This three classes functional group all has different spectrum peak positions in infrared spectrum, by controlling operating current and the operating temperature of semiconductor laser with tunable, the infrared light that can produce different wavelength range goes to measure different functional groups, and then calculates the viscosity of fluid, temperature, granularity, acid number, water content parameter.
This beneficial effect of the invention is: the present invention achieves on-line measurement while multiple fluid parameter only with iraser technology by single-sensor structure, including viscosity, temperature, granularity, acid number, water content.
Accompanying drawing explanation
Fig. 1 is multiparameter integration fluid sensor construction schematic diagram used in the embodiment of the present invention.
Fig. 2 is multiparameter integration fluid sensor internal light path schematic diagram used in the embodiment of the present invention.
Description of symbols in figure: 1, semiconductor laser with tunable;2, the first beam splitter;3, battery of lens;4, horizontal glass;5, the second beam splitter;6, index glass;7, oil path;8, photodetector;9, photoelectric receiving tube;10, detector.
Detailed description of the invention
With embodiment, the detailed description of the invention of the present invention is described below in conjunction with the accompanying drawings, in order to be better understood from the present invention.
Embodiment
As shown in Figure 1 multiparameter integration fluid sensor based on iraser technology, including light path modulation unit, photoelectric signal transformation unit and signal processing module, wherein, light path modulation unit is connected with photoelectric signal transformation unit, signal processing module is connected with each other with photoelectric signal transformation unit, light path modulation unit uses the infrared light of semiconductor laser with tunable modulation different wavelength range, is respectively used to temperature survey, granule detection and infrared spectrum analysis through the first beam splitter, the second beam splitter;Infrared measurement of temperature signal is converted to the signal of telecommunication by photodetector by photoelectric signal transformation unit, by photoelectric receiving tube, particle projection signal is converted to the signal of telecommunication, by detector, interference light signal is converted to infrared spectrum information;Signal processing module utilizes amplifying circuit that small electrical signals is amplified conditioning, determines content of material by infrared spectrum relative analysis, and integrates each supplemental characteristic of fluid and use convergence algorithm to carry out logic verify, final output digit signals.
As shown in Figure 2, the light path process of said system is that semiconductor laser with tunable 1 sends iraser, after the first beam splitter 2, a part of iraser arrives battery of lens 3, and another part is received by photodetector 8 and photoelectric receiving tube 9 through oil path 7 by the first beam splitter 2;Iraser through battery of lens 3 continues arrival the second beam splitter 5 that moves ahead, and a part of iraser is reflected by horizontal glass 4, and another part iraser is detected through oil path 7 by detector 10;Part iraser through the second beam splitter 5 is received by index glass 6 and reflects.
The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (2)
1. a multiparameter integration fluid sensor based on iraser technology, including light path modulation unit, photoelectric signal transformation unit and signal processing module, it is characterized in that: described light path modulation unit is connected with photoelectric signal transformation unit, described signal processing module is connected with each other with photoelectric signal transformation unit, described light path modulation unit uses the infrared light of semiconductor laser with tunable modulation different wavelength range, is respectively used to temperature survey, granule detection and infrared spectrum analysis through the first beam splitter, the second beam splitter;Infrared measurement of temperature signal is converted to the signal of telecommunication by photodetector by described photoelectric signal transformation unit, by photoelectric receiving tube, particle projection signal is converted to the signal of telecommunication, by detector, interference light signal is converted to infrared spectrum information;Described signal processing module utilizes amplifying circuit that small electrical signals is amplified conditioning, determines content of material by infrared spectrum relative analysis, and integrates each supplemental characteristic of fluid and use convergence algorithm to carry out logic verify, final output digit signals.
Multiparameter integration fluid sensor based on iraser technology the most according to claim 1, it is characterized in that: the light path process of described system is, semiconductor laser with tunable sends iraser, after the first beam splitter, a part of iraser arrives battery of lens, and another part is received by photodetector and photoelectric receiving tube through oil path by the first beam splitter;Iraser through battery of lens continues arrival the second beam splitter that moves ahead, and a part of iraser is reflected by horizontal glass, and another part iraser is detected through oil path by detector;Received by index glass through the part iraser of the second beam splitter and reflect.
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