CN108489915A - A kind of fluid measurement optical system - Google Patents
A kind of fluid measurement optical system Download PDFInfo
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- CN108489915A CN108489915A CN201810148005.7A CN201810148005A CN108489915A CN 108489915 A CN108489915 A CN 108489915A CN 201810148005 A CN201810148005 A CN 201810148005A CN 108489915 A CN108489915 A CN 108489915A
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- light source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of fluid measurement optical systems, including light source, spectrum detection device, control device and light source monitoring device, spectrum detection device is for detecting and analyzing fluid to be measured sample, light source monitoring device includes monitoring optical fiber, photodetector, light source adjustment device and standby power source, light source light is transmitted to photodetector by monitoring optical fiber, photodetector is sent to control device after converting optical signals to electric signal, if control device judges light source non-normal working, controls light source adjustment device and standby power source is adjusted or enabled to light source.Present invention can apply to fluid analysis technical fields.Light source monitoring device to ensure that light source is accurate and reliable, and then improves the accuracy and reliability of fluid measurement by monitoring and automatically adjusting the luminous power of light source with the real-time monitoring for completing light source and automatic calibration.Structure of the invention is compact securely, occupies little space, good anti-vibration, the fluid measurement being applicable under the high-temperature, high pressure fluid environment of underground.
Description
Technical field
The present invention relates to fluid analysis technical field, more particularly to a kind of fluid measurement optical system.
Background technology
With the fast development of the economy of energy, fluid measurement technology is on chemical industry, metallurgy, ocean development, oil-gas mining, stratum
Application in the fields such as exploration is more and more extensive, accurate and real for measurement under the special measuring condition of different field, is developed
Become current urgent problem to be solved with the strong fluid measurement tool of property.
Currently, under the conditions of for extreme operating conditions such as underground, deep-seas, light source is during the work time often by the external world
The influence of the complex environments factor such as high temperature, high pressure, noise, vibration effect causes the luminous power of light source to easy to produce offset or go out
It is now abnormal, and then cause fluid measurement result inaccurate.It is filled using multiple light courcess, the light that passes in the fluid measurement tool of the prior art more
It sets and is configured with the structure of multi-detector device, (light source is referred to light source reference optical signal by obtaining multiple sets of light sources reference optical signal
Optical signal when normal work) it is calibrated, and the scale of light source reference signal data is re-started, so that compensatory light is inclined
It moves.Since such fluid measurement tool assembly is relatively more, overall structure volume is larger, cause its use spaces such as underground compared with
Using limited under the conditions of small；Simultaneously as relative position of the fluid measurement tool between internal optical requires stringent, group
Number of packages amount increases but also the position relationship between each component is complicated, to be difficult to ensure that survey tool is integrally-built compact
Property, Assembly stability and seal, this will certainly seriously affect measurement of the survey tool under high-pressure fluid environmental condition and stablize
Property and accuracy.
Invention content
In order to solve the above technical problem, the present invention provides it is a kind of it is compact-sized securely, occupy little space, measure stabilization
Property high fluid measurement optical system ensure that fluid measurement accurately may be used by monitoring in real time and the luminous power of automatic regulation light source
It leans on, the fluid measurement being applicable in underground high temperature, high-pressure fluid environment.
In order to reach the purpose of the present invention, fluid measurement optical system provided by the invention, including light source, spectral detection dress
It sets and control device, spectrum detection device described in the spectrum detection device is described for detecting and analyzing fluid to be measured sample
Spectrum detection device is electrically connected with the control device；The fluid measurement optical system further includes light source monitoring device, described
Light source monitoring device includes monitoring optical fiber, photodetector, light source adjustment device and standby power source, and the monitoring optical fiber will be described
For the optical transport that light source is sent out to the photodetector, the photodetector converts optical signals to electric signal, the photoelectricity
Detector and light source adjustment device are electrically connected with control device respectively, if the control device is according to described in electric signal judgement
Light source non-normal working then controls the light source adjustment device and stand-by power supply is adjusted or enabled to light source.
In the embodiment of the present invention, the incident beam of covering wide spectral range can be generated by the way that a light source is arranged, with full
The demand of foot fluid spectra information analysis in detail.When carrying out fluid analysis, first, fluid to be measured sample enters spectrum detection device
In interior fluid measurement pond；Then, the incident light that light source generates enters in the fluid sample in fluid measurement pond, based in fluid
Fluid-like is exported after each component principle different to the uptake of the light of different wave length, incident beam and fluid sample interaction
The outgoing beam of product；In turn, analyzing processing is first carried out to obtain the absorption light of fluid to outgoing beam by spectrum detection device
Spectrum information, then the absorption spectrum of fluid is subjected to electro-optical signal conversion, the electric signal result of fluid is finally sent to control dress
It sets and is used for analysis fluid properties.
Further include light source monitoring device in the system, light source monitoring device directly acquires what light source was sent out using monitoring optical fiber
Incident beam, and electro-optical signal conversion is carried out to the optical signal of incident beam by photodetector, finally by electric signal result
It exports to control device, control device is by identifying that the light source electric signal of the output is monitored the luminous power of light source, if control
When device processed judges light source non-normal working (i.e. the luminous power offset setting value of light source or appearance is abnormal) according to the electric signal, control
Device processed then controls light source adjustment device and automatically adjusts to the luminous power of light source, until the luminous power of light source restores normal
(i.e. the luminous power of light source is setting value and keeps stablizing), to the real-time monitoring for completing light source and automatic calibration, to ensure light
The reference signal data (referring to the optical signal under light source normal running conditions) of the standby light source deposited is accurate and reliable in spectrum detection device；If
The luminous power of light source shifts or occurs abnormal, and in the case of can not restoring normal condition, light source monitoring device can be direct
Enable standby power source.Using the devices such as multiple light courcess and multiple spectrometers come regulation light source reference signal number in compared with the prior art
According to mode, the present invention by configure one monitoring optical fiber and a photodetector optical signal of light source is supervised in real time
It surveys, the luminous power to ensure that incident beam is accurate and reliable, and then improves the accuracy and reliability of fluid analysis result.Profit
When carrying out fluid measurement with the flow measurement system, the configuration needs to multiple independent light sources and spectrometer are not only reduced,
The overall structure for simplifying measuring system, to realize densification, the miniaturization of the measuring system, meanwhile, also make the measurement be
The infrastructure cost and its maintenance cost of system accordingly reduce, and realize a kind of more economical, more practical fluid measurement mode.
Optionally, the light source monitoring device further includes being arranged between the monitoring optical fiber and the photodetector
Condenser lens.The incident light that can be generated to light source using condenser lens is focused, and then more fully imports monitoring optical fiber
In, to ensure the light source light signal integrity, accurate of photodetector output.
Optionally, the spectrum detection device include fluid measurement pond, the first optical window sheets, the second optical window sheets and
There is hollow cavity, first optical window sheets to be arranged in the hollow cavity for spectroanalysis instrument, the fluid measurement pond
And positioned at close to the side of the light source, second optical window sheets are arranged in the hollow cavity and positioned at close to described
The side of spectroanalysis instrument forms fluid sample channel between first optical window sheets and second optical window sheets,
Convex lens and Optic transmission fiber are additionally provided between second optical window sheets and the spectroanalysis instrument, the convex lens, which is located at, to be leaned on
The side of nearly second optical window sheets, the Optic transmission fiber pass through the fiber coupling connector and the spectroanalysis instrument phase
Connection.
In spectrum detection device, fluid measurement pond is made of titanic alloy machining, inside offer hollow cavity, first
Optical window sheets and the second optical window sheets can be separately mounted on the fixed position of hollow cavity both sides, pass through the first optical window
The inner surface of mouth piece and the second optical window sheets is close to connect with hollow cavity, makes the first optical window sheets and the second optical window
It is high that a closed fluid sample channel, the fluid measurement pool structure deft design, and structural strength are formed between piece so that fluid
Measurement structure overall compact is secured.
When carrying out fluid measurement, fluid enters fluid sample channel from the fluid inlet on fluid measurement pond, and along stream
Body sample channel flows, by flowing out fluid sample channel when outlet flow channels.Then, make the incident beam warp that light source is sent out
The first optical window sheets are crossed to diffuse into fluid sample, after interacting between each component in incident beam and fluid,
The outgoing beam of fluid, i.e. the absorption spectrum information of fluid sample are exported from the second optical window sheets.
In the embodiment of the present invention, by using extreme hardness and with certain thickness sapphire material first, the
Two optical window sheets so that the first, second optical window sheets can bear the environment such as high temperature, high pressure, the corrosive medium of external fluid
Effect, and ensure that fluid sample channel is completely closed, prevent external fluid from entering internal system damage internal system component.And
And first, second optical window sheets and fluid contact surface on be surface-treated using finishing polish and coating process, to carry
Highly viscous fluid avoids fluid from causing fluid measurement inaccurate in viscous stick of optical window on piece in the mobility of optical window on piece
Really.
In addition, the convex lens being equipped between the second optical window sheets and spectroanalysis instrument, convex lens can be to the outgoing of output
Light beam is focused, and is made fluid outgoing beam as completely as possible and is imported Transmission Fibers in a converging fashion, and utilizes optical fiber
The outgoing beam of coupling Transmission Fibers is sent to spectroanalysis instrument.Due to each optical module in the fluid measurement optical system
It is compact-sized, by the firm fixation of fixed pedestal, so that the measuring system, which has, measures stability height, optical signal transmission coupling
Right high excellent properties.
Optionally, the spectrum detection device further includes the first briquetting and the second briquetting, and one end of first briquetting is inserted
Enter in the hollow cavity and be fixed first optical window sheets, one end insertion of second briquetting is described hollow
It is fixed in cavity and by second optical window sheets, between first briquetting and first optical window sheets, institute
It states and is equipped with sealing ring between the second briquetting and second optical window sheets.
When the first briquetting, the second briquetting be inserted into hollow cavity when, the first briquetting, the second briquetting end face press up against
On the outer surface of first optical window sheets and the second optical window sheets, the first optical window sheets and the second optical window sheets are carried out
Positioning, also, the outer side surface of the first briquetting and the second briquetting and the interior sidewall surface of hollow cavity are fitted close, by the first optics
Diaphragm and the second optical window sheets are pressed abd fixed in hollow cavity, to ensure the structural integrity in fluid sample channel and close
Closing property；When two briquettings are completely embedded into hollow cavity, one is constituted between two briquettings, hollow cavity and two optical window sheets threes
Body structure (i.e. fluid measurement pond assembling structure) keeps the fluid measurement pond compact assembling structure secured, to ensure two optical windows
Piece can remain tight fit under the conditions of extremely high pressure between hollow cavity.
In addition, the end face being in contact between two briquettings and two optical window sheets is equipped with sealing ring, by two optical windows
Sealing ring is arranged in the outside of mouth piece, and the outside of two optical window sheets is made to form excellent sealing between two briquettings respectively, on the one hand
Direct rigid contact causes optical window sheets to damage when can avoid assembling between two briquettings and optical window sheets, on the other hand avoids
Sealing ring is in direct contact with fluid, extends the service life of sealing structure in fluid sample channel, logical to improve fluid sample
The reliability of seal structures.
Optionally, the spectrum detection device further includes light-guide device, and the center of first briquetting is equipped with first through hole,
The center of second briquetting is equipped with the second through-hole, and one end of the light-guide device is inserted into the first through hole and is fixed.
Optionally, the peripheral surface of first briquetting is equipped with threaded hole, and trip bolt is by the threaded hole and compresses
The light-guide device.
In the embodiment of the present invention, by being equipped with first through hole at the center of the first briquetting, set on the peripheral surface of the first briquetting
There is threaded hole, the one end of light-guide device far from light source is made to can be inserted into first through hole and compress light-guide device admittedly using trip bolt
In the first through hole being scheduled on, to be fixedly connected with the first briquetting.
Optionally, the internal diameter close to one end of the light source of the light-guide device is set as being not less than the hollow cavity
Diameter.
In the embodiment of the present invention, light-guide device forms the optical input surface of a taper by the internal face of the side of close to sources, should
One end internal diameter by close to sources of taper optical input surface is big, and the internal diameter is set as identical as the diameter of hollow cavity, guide-lighting member
The incident beam of diverging from light source is imported the first optical window sheets by part in a converging fashion by optical input surface, and is entered
Fluid sample channel reduces luminous flux loss of the incident beam in conductive process, to ensure that fluid sample absorbs as much as possible
The integrality and accuracy of spectral information.
Optionally, the spacing between first optical window sheets and second optical window sheets is set as 2mm-3mm.
In the embodiment of the present invention, the spacing d between the first optical window sheets and the second optical window sheets is preferably set to
2mm-3mm, the i.e. spacing in fluid sample channel are 2mm-3mm.Specifically, when d is less than 2mm, make between two optical window sheets
Spacing it is too small, be easy to cause fluid and stagnate, accumulate in fluid sample channel, can not ensure fluid in fluid sample channel
Proper flow, the absorption spectrum result so as to cause fluid are difficult to determine whether to deliver into the stream in fluid sample channel in real time
The spectral information of body sample, therefore can not ensure accuracy and validity that fluid measures in real time；And when d is more than 3mm, make two
Spacing d between optical window sheets is excessive, i.e., the flowing space of fluid is excessive in fluid sample channel, and fluid sample is made to be not enough to
It uniformly spreads in entire fluid sample channel, the thickness sprawled is also relatively large, is easy to cause between incident beam and fluid
It contacts and interacts and is insufficient, and then influence the measurement accuracy and integrality of fluid.The fluid sample interchannel is away from not only
It disclosure satisfy that the design requirement that fluid accurately measures in fluid sample channel, meanwhile, fluid sample channel can be met in underground
Requirement under high temperature, high pressure, smaller steric requirements.
Optionally, the thickness of first optical window sheets and second optical window sheets is set as 5mm-7mm.
For underground high temperature, high pressure (up to 100Mpa or more) fluid measurement operating mode, in the embodiment of the present invention, first, the
Two optical window sheets are made of the sapphire material of extreme hardness, and set the thickness of two optical window sheets to 5mm-7mm,
Two optical window sheets holding structure in the case where bearing the effect of the fluid environments such as high temperature, high pressure is stablized, and and external fluid
It is fully sealed between sample channel, prevents fluid leakage from influencing the measurement stability and accuracy of fluid measurement optical system.
Optionally, the fluid measurement optical system is the fluid measurement optical system measured suitable for downhole fluid.
In the present invention, pass through the structure snd size of experimental design optical window sheets, briquetting and fluid sample channel so that stream
Bulk measurement structure overall compact is secured, and sapphire optical diaphragm high temperature high voltage resistant is had excellent performance, and ensures that fluid sample channel is complete
It is hermetically sealed so that the fluid measurement optical system is applicable to underground high temperature, high pressure, measures the works such as small, the time of measuring length in space
Fluid measurement under the conditions of condition.
Technical scheme of the present invention compared with prior art, has the advantages that：
1, by the way that light source monitoring device is arranged, the luminous power of light source can be carried out to monitor and automatically adjust in real time, to ensure
The luminous power of light source is accurate and reliable, and then improves the accuracy and reliability of fluid measurement；
2, by simplifying the component Configuration of measuring system, optimize the fixed form between each optical module, realize the survey
The densification of amount system, miniaturization make measurement stability height, optical signal transmit degree of coupling height, and then improve flow measurement system
Practicability；
3, pass through the structure snd size of experimental design optical window sheets, briquetting and fluid sample channel so that fluid measurement
Structure overall compact is secured, and optical window sheets high temperature high voltage resistant is had excellent performance, and ensures the being fully sealed property in fluid sample channel, should
Flow measurement system is suitable for the measurement of downhole fluid.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and is obtained in claim and attached drawing.
Description of the drawings
Attached drawing is used for providing further understanding technical solution of the present invention, and a part for constitution instruction, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the structural schematic diagram of the fluid measurement optical system according to one embodiment of the invention.
Wherein, the relationship in Fig. 1 between reference numeral and component names is：
1 light source base, 2 light sources, 3 light-guide devices, 4 first optical window sheets, 5 fluid sample channels, 6 second optical windows
Piece, 7 spectroanalysis instruments, 8 convex lenses, 9 Optic transmission fibers, 10 fiber coupling connectors, 11 monitoring optical fiber, 12 condenser lenses, 13 photoelectricity
Detector.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature mutually can arbitrarily combine.
It is not high, whole in order to solve the fluid measurement tool of prior art light source stability under the conditions of extreme operating condition
The big problem of structure occupied space, the present invention provides a kind of fluid measurement optical system, which includes light source, spectral detection
Device, light source monitoring device and control device.In the embodiment of the present invention, the halogen lamp by the way that a broad band is arranged generates covering
The incident beam of wide spectral range, to meet the needs of detailed fluid spectra information analysis.When carrying out fluid analysis, first, wait for
Fluid measured sample enters in the fluid measurement pond in spectrum detection device, and then, the incident light that light source generates enters fluid measurement
In fluid sample in pond, based on the principle different to the uptake of the light of different wave length of each component in fluid, incident beam with
The outgoing beam of fluid sample is exported after fluid sample interaction, and then first outgoing beam is carried out by spectrum detection device
The absorption spectrum information of fluid is obtained after analyzing processing, then the absorption spectrum of fluid is subjected to electro-optical signal conversion, it finally will be electric
Signal results are sent to control device and are used for analysis fluid properties.
By the way that light source monitoring device is arranged, the luminous power of light source can monitor and calibrate automatically in real time, carry out fluid
When measurement, if control device judges light source non-normal working, i.e. the light work(of light source according to the electric signal that light source monitoring device exports
When rate offset setting value or abnormal appearance, control device then controls light source adjustment device and is adjusted automatically to the luminous power of light source
Section, until the luminous power of light source restores normal, i.e., the luminous power of light source is setting value and keeps stablizing, to complete the reality of light source
When monitoring and automatic calibration, the reference signal data to ensure the standby light source deposited in spectrum detection device it is accurate and reliable；If light source
Luminous power shift or occur abnormal and in the case of normal condition can not being restored, light source monitoring device can directly enable standby
Use light source.Using the corollary apparatus such as multiple light courcess and multiple spectrometers come regulation light source reference signal data in compared with the prior art
Mode, the present invention by only configure one monitoring optical fiber and a photodetector optical signal of light source is supervised in real time
It surveys, and is automatically adjusted to light source luminous power using light source adjustment device, the luminous power to ensure that light source is accurate and reliable,
And then improve the accuracy and reliability of fluid analysis result.When carrying out fluid measurement using the flow measurement system, not only subtract
The configuration needs to multiple independent light sources and spectrometer are lacked, have simplified the overall structure of measuring system, realize the measurement system
The densification of system, miniaturization, meanwhile, so that the infrastructure cost of measuring system and its maintenance cost is accordingly reduced, realizes one kind
More economical, more practical fluid measurement mode is applicable to the measurement analysis of underground high temperature, fluid in high-pressure fluid environment.
The technical solution of specific embodiment the present invention will be described in detail embodiment will be passed through below.
Fig. 1 is the structural schematic diagram according to the fluid measurement optical system of one embodiment of the invention；It can from Fig. 1
Go out, the fluid measurement optical system that the embodiment of the present invention provides, including light source 2, spectrum detection device and control device, spectrum
Detection device, the performance for analyzing fluid to be measured sample, spectroanalysis instrument 7 are electrically connected with control device；Fluid measurement optics
System further includes light source monitoring device, light source monitoring device include monitoring optical fiber 11, photodetector 13, light source adjustment device and
Standby power source, for the optical transport that monitoring optical fiber 11 sends out light source 2 to photodetector 13, photodetector 13 converts optical signal
For electric signal, photodetector 13 and light source adjustment device are electrically connected with control device respectively, if control device judges that light source 2 is non-
Normal work, then control the light source adjustment device and light source 2 be adjusted or enabled stand-by power supply.
In the present embodiment, by selecting the halogen lamp of a service life length, low-power, broad band, halogen lamp to be fixed on
In support bracket fastened light source base 1, to provide the incident beam of covering wide spectral range for spectrum detection device.Carry out fluid
When analysis, as shown in Figure 1, first, fluid to be measured sample enters in the fluid measurement pond in spectrum detection device, then, light source 2
The incident light of generation enters in the fluid sample in fluid measurement pond, the absorption based on each component in fluid to the light of different wave length
Different principles is measured, the outgoing beam of fluid sample is exported after incident beam and fluid sample interaction, is filled through spectral detection
It sets and obtains the absorption optical signal of fluid after carrying out analyzing processing to outgoing beam, and optical-electronic is carried out to the absorption optical signal of fluid
Fluid measurement electric signal is obtained after signal conversion, and is sent to control device and is used for analysis fluid properties.
Further include light source monitoring device in the system, light source monitoring device directly acquires the hair of light source 2 using monitoring optical fiber 11
The incident beam gone out, and electro-optical signal conversion is carried out to incident beam by photodetector 13, finally by 2 electric signal of light source
As a result it exports to control device, control device is by identifying that the electric signal of the output is monitored the luminous power of light source 2.If control
Device processed judges light source non-normal working according to the electric signal, i.e. the luminous power offset setting value of light source 2 or when occurring abnormal, control
Device processed then controls light source adjustment device and automatically adjusts to the luminous power of light source 2, until the luminous power of light source 2 is restored just
Often, i.e., the luminous power of light source 2 is setting value and keeps stablizing, to the real-time monitoring for completing light source 2 and automatic calibration, to ensure
The reference signal data of the standby light source 2 deposited is accurate and reliable in spectrum detection device；If the luminous power of light source shifts or occurs
Abnormal and in the case of can not restoring normal condition, light source monitoring device can directly enable standby power source.Compared with the prior art
It is middle in such a way that multiple light courcess 2 and multiple spectrometer corollary apparatus are come the reference signal data of regulation light source 2, the present invention passes through only
Piece monitoring optical fiber 11 of configuration and photodetector 13 monitor the optical signal of light source 2 in real time, and adjust dress using light source
It sets and automatically adjusts to the luminous power of light source 2, the luminous power to ensure that light source 2 is accurate and reliable, and then improves fluid point
Analyse the accuracy and reliability of result.When carrying out fluid measurement using the flow measurement system, not only reduce to multiple independences
Light source and spectrometer configuration needs, simplify the overall structure of measuring system, realize the densification, small-sized of the measuring system
Change, meanwhile, so that the infrastructure cost of measuring system and its maintenance cost is accordingly reduced, realizes a kind of more economical, more practical
Fluid measurement mode.
Further, as shown in Figure 1, light source monitoring device further include setting monitoring optical fiber 11 and photodetector 13 it
Between condenser lens 12.Condenser lens 12 is fixed on by fixing bracket at focal position, can be to light source 2 using condenser lens 12
The incident light of generation is focused, and then is more fully imported in monitoring optical fiber 11, to ensure what photodetector 13 exported
2 optical signal of light source is complete, accurate.
Further, as shown in Figure 1, spectrum detection device includes fluid measurement pond, the first optical window sheets 4, the second light
Learn diaphragm 6 and spectroanalysis instrument 7.Wherein, fluid measurement pond using titanic alloy machining make, inside offer it is hollow recessed
Chamber.First optical window sheets 4 and the second optical window sheets 6 are made of the very high sapphire material of hardness, have high temperature resistant
The features such as (175 DEG C or more), high pressure resistant (100Mpa or more) and high light transmittance (being more than 95%), also, the first optical window sheets 4
It is surface-treated using finishing polish and coating process with the contact surface of the second optical window sheets 6 and fluid, to reach optics matter
Amount requires, and on the one hand enhances the translucency of the first optical window sheets 4 and the second optical window sheets 6, on the other hand makes viscous fluid
It is not easy on the surface for being sticked to two optical window sheets, to ensure fluid proper flow and uniform fold on optical window sheets surface,
To improve fluid measurement accuracy.
When specific assembly, the first optical window sheets 4 and the second optical window sheets 6 are separately mounted to consolidating in hollow cavity
Positioning is set, wherein the first optical window sheets 4 are located at by the side of close to sources 2, and the second optical window sheets 6 are located at close to spectrum
The side of analyzer 7, by the inner surface of the inner surfaces of the first optical window sheets 4 and the second optical window sheets 6 respectively with it is hollow
Cavity is close to connect, and makes to form a closed fluid sample channel 5 between the first optical window sheets 4 and the second optical window sheets 6.
The fluid measurement pool structure deft design, and structural strength is high so that fluid measurement pond assembling structure overall compact is secured.
Specifically, as shown in Figure 1, when carrying out fluid measurement, fluid enters from the fluid inlet on fluid measurement pond
Fluid sample channel 5, and flowed along fluid sample channel 5, by flowing out fluid sample channel 5 when fluid outlet.Then, make light
The incident beam that source 2 is sent out is diffused by the first optical window sheets 4 in fluid sample, by each in incident beam and fluid
After interacting between component, the outgoing beam of fluid, i.e. the absorption spectrum letter of fluid sample are exported from the second optical window sheets 6
Breath.By using extreme hardness and with certain thickness sapphire material the first optical window sheets 4, the second optical window
Piece 6 so that two optical window sheets can bear the environmental activities such as high temperature, high pressure, the corrosive medium of external fluid, and ensure fluid-like
Product channel 5 is completely closed, and prevents external fluid from entering internal system damage internal system component.
In addition, fluid measurement pond has hollow cavity, it is additionally provided between the second optical window sheets 6 and spectroanalysis instrument 7 convex
Lens 8 and Optic transmission fiber 9, convex lens 8 are located at close to the side of the second optical window sheets 6 and are fixed on focus by fixing bracket
At position, Optic transmission fiber 9 is connected by fiber coupling connector 10 with spectroanalysis instrument 7.Convex lens 8 can be to the emergent light of output
Beam is focused, and is made fluid outgoing beam as completely as possible and is imported Transmission Fibers in a converging fashion, and utilizes optical fiber coupling
The outgoing beam of 10 Transmission Fibers of splice grafting head is sent to spectroanalysis instrument 7.Due to each optics group in the fluid measurement optical system
Part is compact-sized, by the firm fixation of fixed pedestal, so that the measuring system, which has, measures stability height, optical signal transmission
The high excellent properties of the degree of coupling.
Further, spectrum detection device further includes the first briquetting and the second briquetting, and one end insertion of the first briquetting is hollow
It is fixed in cavity and by the first optical window sheets 4, one end of the second briquetting is inserted into hollow cavity and by the second optical window
Mouth piece 6 is fixed.
When specific assembly, the first optical window sheets 4 and the second optical window sheets 6 are put from hollow cavity both sides respectively first
Enter the fixed position in hollow cavity, and then the first briquetting, the second briquetting are inserted into the both sides of hollow cavity, makes the first pressure
Block, the second briquetting end face press up against on the outer surface of the first optical window sheets 4 and the second optical window sheets 6, by
One optical window sheets 4 and the second optical window sheets 6 are positioned, and by the outer side surface of the first briquetting and the second briquetting in
The interior sidewall surface of empty cavity is fitted close, and the first optical window sheets 4 and the second optical window sheets 6 are pressed abd fixed on hollow cavity
It is interior, to ensure the structural integrity and seal in fluid sample channel 5；When two briquettings are completely embedded into hollow cavity, two pressures
It is integrally formed structure, i.e. fluid measurement pond assembling structure between block, hollow cavity and two optical window sheets threes.
Then, the assembling structure integral installation of fluid measurement pond is fixed in a pockets using installation tool, is passed through
The end face far from two optical window sheets of two briquettings is fixed by the internal face of pockets, and then in briquetting and appearance
Receive groove it is dual be fixed effect under keep the fluid measurement pond compact assembling structure secured, to ensure that two optical window sheets exist
Tight fit can be remained under the conditions of extremely high pressure between hollow cavity, is ensured between external fluid sample channel 5
It is fully sealed, to prevent fluid leakage from influencing the measurement stability and accuracy of internal optics measuring system.
To further increase the measurement stability of the fluid measurement optical system, fluid measurement optical system further includes shell
With the fixing bracket being arranged in shell, (fluid measurement pond assembling structure is fixed on appearance for light source 2, fluid measurement pond assembling structure
Receive in groove), convex lens 8, Transmission Fibers, spectroanalysis instrument 7, monitoring optical fiber 11, photodetector 13 and light source adjust dress
The setting position that equal components are fixedly mounted on by fixing bracket in shell is set, and ensures the center of light source 2, light-guide device
The center at 3 center, the center of optical window sheets and Optic transmission fiber 9 is in coaxial state, and forming one with shell completely flows
Bulk measurement optical system overall, to further improve the compactedness of fluid measurement pond assembling structure entirety and safe to use
Property, it avoids the fluid environments factor such as down-hole high pressure, noise, vibration from being transmitted in optical measuring system, the measurement of system is stablized
Property and measurement accuracy have an adverse effect, the structure design can be improved fluid measurement optical system underground survey environment be applicable in
Range.
Further, between the first briquetting and the first optical window sheets 4, between the second briquetting and the second optical window sheets 6
Equipped with sealing ring.By the way that sealing ring is arranged in the outside of two optical window sheets, the outside of two optical window sheets is made to be pressed respectively with two
Excellent sealing is formed between block, direct rigid contact causes light when on the one hand can avoid assembling between two briquettings and optical window sheets
Diaphragm damage is learned, on the other hand sealing ring is avoided to be in direct contact with fluid, sealing structure makes in extension fluid sample channel
With the service life, to improve the reliability of fluid sample channel sealing structure.
In the present embodiment, light-guide device 3 is equipped between light source 2 and the first optical window sheets 4.Meanwhile first briquetting
Center is equipped with first through hole, and the center of the second briquetting is equipped with the second through-hole, and the peripheral surface of the first briquetting is equipped with threaded hole.It leads
When optical element 3 is fixed, by light-guide device 3, one end far from light source 2 is inserted into first through hole and will be guide-lighting using trip bolt first
In the first through hole that element 3 is pressed abd fixed on, to be fixedly connected with the first briquetting, and then a structure is constituted with fluid measurement pond
It is whole.When the first briquetting is completely embedded into hollow cavity, threaded hole and trip bolt on the first briquetting are hidden in hollow
Inside cavity, make trip bolt that can not deviate from threaded hole, improves the reliability of screw fastening.
Specifically, as shown in Figure 1, internal face of the light-guide device 3 by the side of close to sources 2 forms the light input of a taper
One end internal diameter by close to sources 2 in face, the pyramidal structure is big, and the internal diameter is set as identical as the diameter of hollow cavity, guide-lighting
The incident beam of diverging from light source 2 is imported the first optical window sheets 4 by element 3 in a converging fashion by optical input surface,
And enter fluid sample channel 5, luminous flux loss of the incident beam in conductive process is reduced as much as possible, to ensure light source 2
Incident light light signal strength, to improve the integrality and accuracy of fluid sample absorption spectrum information.Meanwhile guide-lighting member
The internal face of part 3 uses coating designs, to further improve the spotlight effect of 3 internal face of light-guide device.
In the present embodiment, in order to meet the smaller application for measuring the flow measurement system under steric requirements such as underground, manager
It is preferably set to 2mm- by design and experimental verification, the spacing d between the first optical window sheets 4 and the second optical window sheets 6
3mm, the i.e. spacing in fluid sample channel 5 are 2mm-3mm.When d is less than 2mm, keep the spacing between two optical window sheets too small,
It is easy to cause fluid to stagnate, accumulate in fluid sample channel 5, can not ensure fluid proper flow in fluid sample channel 5,
Absorption spectrum result so as to cause fluid is difficult to determine whether to deliver into the fluid sample in fluid sample channel 5 in real time
Spectral information, therefore can not ensure accuracy and validity that fluid measures in real time；And when d is more than 3mm, make two optical windows
Spacing d between piece is excessive, since the flowing space of fluid in fluid sample channel 5 is excessive, fluid sample is made to be not enough to uniformly
It spreads in entire fluid sample channel 5, the thickness that fluid sample is sprawled is also relatively large, is easy to cause incident beam and fluid
Between contact and interact it is insufficient, and then influence fluid measurement accuracy and integrality.5 spacing of fluid sample channel
The design requirement that fluid accurately measures in fluid sample channel 5 can not only be met, meanwhile, fluid sample channel 5 can be met
Requirement under underground high temperature, high pressure, smaller steric requirements.
In the present embodiment, in order to make the flow measurement system disclosure satisfy that underground high temperature, high pressure (up to 100Mpa with
On) the lower normal work of fluid environment effect, the first optical window sheets 4 and the second optical window sheets 6 are using the blue precious of extreme hardness
Stone material makes, and sets the thickness of two optical window sheets to 5mm-7mm so that two optical window sheets can bear high temperature,
The lower holding structure of the fluid environments such as high pressure effect is stablized, and is fully sealed between external fluid sample channel 5, prevents fluid from letting out
Dew influences the measurement stability and accuracy of fluid measurement optical system.
Further, fluid measurement optical system is the fluid measurement optical system measured suitable for downhole fluid.This reality
It applies in example, passes through the structure snd size of experimental design optical window sheets, briquetting and fluid sample channel 5 so that fluid measurement knot
Structure overall compact is secured, and sapphire optical diaphragm high temperature high voltage resistant is had excellent performance, and ensures that fluid sample channel 5 is fully sealed,
So that the fluid measurement optical system is applicable to underground high temperature, high pressure, measures fluid measurement under the conditions of the conditions such as space is small, especially
It is suitable for the measurements of underground viscous fluid.
In the description of the embodiment of the present invention, it is to be understood that term "upper", "lower", "inner", "outside", " inside ",
The orientation or positional relationship of the instructions such as " outside ", " end face ", " wall surface ", " side ", " circumferential surface " is orientation based on ... shown in the drawings
Or position relationship, it is merely for convenience of description of the present invention and simplification of the description, not indicating or implying the indicated structure has spy
Fixed orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of the embodiment of the present invention, it should be noted that unless otherwise clearly defined and limited, term is " even
Connect ", " being fixedly connected ", " installation ", " assembly " shall be understood in a broad sense, can also be detachably to connect for example, it may be being fixedly connected
It connects, or is integrally connected；Term " installation ", " connection ", " being fixedly connected ", " being connected " can be directly connected, and can also lead to
It crosses intermediary to be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be with
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not limited to the present invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, the appended claims that must still be subject to defined.
Claims (10)
1. a kind of fluid measurement optical system, including light source, spectrum detection device and control device, which is characterized in that
The spectrum detection device is for detecting and analyzing fluid to be measured sample, the spectrum detection device and the control device
Electrical connection；
The fluid measurement optical system further includes light source monitoring device, and the light source monitoring device includes monitoring optical fiber, photoelectricity
Detector, light source adjustment device and standby power source, optical transport to the photoelectricity that the monitoring optical fiber sends out the light source are visited
Survey device, the photodetector converts optical signals to electric signal, the photodetector and light source adjustment device respectively with control
Device electrical connection processed, if the control device judges the light source non-normal working according to the electric signal, controls the light
Light source is adjusted or enables the standby power source in source regulating device.
2. fluid measurement optical system according to claim 1, which is characterized in that the light source monitoring device further includes setting
Set the condenser lens between the monitoring optical fiber and the photodetector.
3. fluid measurement optical system according to claim 1, which is characterized in that the spectrum detection device includes fluid
Measuring cell, the first optical window sheets, the second optical window sheets and spectroanalysis instrument, the fluid measurement pond have hollow cavity,
First optical window sheets are arranged in the hollow cavity and positioned at close to the side of the light source, second optical windows
Mouth piece is arranged in the hollow cavity and positioned at close to the side of the spectroanalysis instrument, first optical window sheets and institute
It states and forms fluid sample channel between the second optical window sheets, between second optical window sheets and the spectroanalysis instrument also
Equipped with convex lens and Optic transmission fiber, the convex lens is located at close to the side of second optical window sheets, the Optic transmission fiber
It is connected with the spectroanalysis instrument by fiber coupling connector.
4. fluid measurement optical system according to claim 3, which is characterized in that the spectrum detection device further includes
One briquetting and the second briquetting, one end of first briquetting are inserted into the hollow cavity and by the first optical window sheets pressures
It fastens, one end of second briquetting is inserted into the hollow cavity and is fixed second optical window sheets, institute
State between the first briquetting and first optical window sheets, between second briquetting and second optical window sheets be equipped with it is close
Seal.
5. fluid measurement optical system according to claim 4, which is characterized in that the spectrum detection device further includes leading
The center of optical element, first briquetting is equipped with first through hole, and the center of second briquetting is equipped with the second through-hole, the leaded light
One end of element is inserted into the first through hole and fixed.
6. fluid measurement optical system according to claim 5, which is characterized in that set on the peripheral surface of first briquetting
There is threaded hole, trip bolt is by the threaded hole and compresses the light-guide device.
7. fluid measurement optical system according to claim 5, which is characterized in that the close light of the light-guide device
The internal diameter of the one end in source is set as the diameter not less than the hollow cavity.
8. the fluid measurement optical system according to any one of claim 3-7, which is characterized in that first optical window
Spacing between mouth piece and second optical window sheets is set as 2mm-3mm.
9. the fluid measurement optical system according to any one of claim 3-7, which is characterized in that first optical window
The thickness of mouth piece and second optical window sheets is set as 5mm-7mm.
10. the fluid measurement optical system according to any one of claim 1-7, which is characterized in that the fluid measurement
Optical system is the fluid measurement optical system measured suitable for downhole fluid.
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Application publication date: 20180904 |