CN206723847U - A kind of high pressure CO2Pipeline leakage checking system - Google Patents
A kind of high pressure CO2Pipeline leakage checking system Download PDFInfo
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- CN206723847U CN206723847U CN201720208405.3U CN201720208405U CN206723847U CN 206723847 U CN206723847 U CN 206723847U CN 201720208405 U CN201720208405 U CN 201720208405U CN 206723847 U CN206723847 U CN 206723847U
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Abstract
A kind of Compressed CO_2 pipeline leakage checking system of the utility model, the system includes sensor fibre, main frame, signal processing apparatus and master control system, the sensor fibre is arranged in Compressed CO_2 pipeline lower soil, the sensor fibre is connected with the main frame, the sensor fibre receives the signal that the main frame is sent, and feedback signal to main frame, the main frame is handled feedback signal transmission to signal processing apparatus, the signal processing apparatus is connected with the master control system；The main frame includes laser pulse light supply apparatus, scattering light separator, Electro-Optical Sensor Set and thermostat, the laser pulse light source sends pulse signal to the sensor fibre, and the feedback signal of the sensor fibre is successively by the thermostat, scattering light separator and Electro-Optical Sensor Set to the signal processing apparatus.The detection of Compressed CO_2 pipe leakage point is effectively realized by joule Thompson effect, Raman principle and optical time domain reflection principle.
Description
Technical field
The utility model belongs to CO2The technical field of pipeline leakage testing, more particularly to a kind of inspection of Compressed CO_2 pipe leakage
Examining system.
Background technology
With the getting worse of Global Greenhouse Effect, the emission reduction of greenhouse gases is also increasingly paid attention in countries in the world.And CO2It is
Cause the most important greenhouse gases of greenhouse effects, for the percentage contribution of global warming, CO2Account for 55%.Therefore
CCUS (carbon is trapped, transports, buries and utilized) technology is arisen at the historic moment, and carbon trapping is will to be come out produced by the industries such as industry, the energy
CO2Separate, then means are stored by CO by carbon2It is inferior with the place of atmospheric isolation to be transported to seabed or ground.This is to subtract
Few CO2Discharge, tackle the powerful mean of global warming.But discharge CO2With seal up for safekeeping distance between ground be separated by it is thousands of multifarious
Rice, therefore, need to use pipeline CO trapping place and burying place2It is fast economic mode.
Pure CO2It is colourless, tasteless, nontoxic, non-flammable material.Pure CO2Three phase point for 0.52MPa, -56 DEG C；Face
Boundary's point is 7.4MPa, 31 DEG C.When higher than critical-point pressure and temperature, CO2In overcritical or close phase state, now, CO2Tool
There are the density of liquid, the viscosity of gas and compressibility, be full blast for pipeline transportation.Therefore, in order to improve CO2Pipeline
Transfer efficiency, CO2 pipelines generally convey under high pressure (above-critical state or close phase).Although CO2Without as natural gas
Inflammable and explosive fried characteristic, still, for the carbon dioxide of such high pressure once generation leakage accident is abnormally dangerous, fatal rate is high.
After CO 2 high pressure transport pipeline leaks, the most directly injury is exactly that its powerful air-flow can directly kill injection
Personnel in direction, spray regime, next to that gas concentration lwevel is excessive in environment near causing, causes cerebral anoxia or even stop up
Breath is dead.
Traditional method for detecting pipeline, such as manually inspect periodically and checking CO2During pipeline leakage, because CO2With colourless
The characteristics of tasteless, generally in CO2It is not easy to be detected by conventional method when pipeline leaks.Therefore, CO is studied2Pipeline is let out
Missing inspection survey technology is particularly important.Existing CO2The detection method of pipeline leakage, according to outflow and flow ipe mass of medium/
Difference between volume judges CO2The leakage of pipeline.But CO2The detection method of pipeline leakage can not position to leakage point,
And real-time is poor；And leaked for small-bore helpless.
However, current most of technology is all the technology of oil and gas pipeline leakage detection, for CO2This special gas
Pipe safety control is relatively fewer with the technology of leak detection.In current CO2The Disciplinary Frontiers master of the detection method of pipeline leakage
The research direction wanted is echo sounding.Echo sounding is to utilize CO2" sound " sent during leakage determines leak source position, main
To include measure on stress pulse method and sound emission detection method, wherein the use of measure on stress pulse method is than wide.Work as CO2Pipeline is let out
During leakage, the friction of gas leakage and leakage hole wall can produce stress wave, and this stress wave is propagated along tube wall, is installed using pipe ends
The piezoelectric transducer sensitive to stress wave, the time difference that two piezoelectric transducers receive is calculated according to principle of correlation analysis and estimated
Leakage point position.But stress wave has the interference of various noise, such as industrial frequency noise, ambient noise in communication process
Deng, influence leakage point detection accuracy.
Chinese patent literature CN104456091A discloses a kind of fibre optic interferometer CO for being based on 3 × 3 couplers2Pipeline is let out
Device for detecting leakage is efficiently solved in prospection stress wave detection method because noise jamming stress wave propagation influences leakage point detection accuracy
The problem of.The device includes signal transmitting and processing system, optical fiber sensing system, Signal Analysis System, light source, the first single-mode optics
Fibre, the first coupler, the second single-mode fiber, optical circulator, the 3rd single-mode fiber, the 4th single-mode fiber, the 5th single-mode fiber,
Two couplers, the first sensor fibre, the second sensor fibre, the first optical-electrical converter, the second optical-electrical converter, the first solution mode transfer
Block, the second demodulation module, computer.Optical signal is converted into electric signal through optical-electrical converter, then demodulated, into computer,
It is determined that leakage situation and leakage point position.The present apparatus can detect leakage situation along pipeline, be especially suitable for entering big-diameter pipeline
Row detection, for CO2This special transport gas, can be with significantly temperature drop, due to fiber work temperature model in leakage
Enclose greatly, make device that still there is very high sensitivity and positioning precision under temperature drop.
North China Electric Power University Ma Yifan paper " the pipe leakage Position Research based on acoustic sensor " discloses one kind
CO based on sound emission2Transport pipeline leak detection platform, belongs to acoustic emission detection method, using Multisensor Data Fusion Algorithm
Positioning precision is improved, the sensor that will leak out hole upstream and downstream is respectively divided into two groups, and two groups of signals carry out cross-correlation respectively, in order to go
Except ambient noise disturbs, the feature of acoustic emission signal is extracted, acoustical signal is carried out using wavelet transformation and empirical mode decomposition
Reconstruct, increase the fault-tolerance and positioning accuracy of detecting system.But employed in the paper pipeline internal pressure for 0.5MPa,
The leakage orientation problem that gaseous state CO2 is propagated in the duct, and in the application of actual CCUS technologies, CO2 is faced with super in the duct
Boundary's state transfer, and only consider the section that CO2 pipelines are preferable straight tube, pipe welding seam and adpting flange or bend are not considered
In the case of acoustic signal propagation aberration problems.
In summary, in the prior art for high pressure (above-critical state or close phase) CO2Leakage point present in pipe detection
Position inaccurate, precision are low, detection efficiency is low and real-time, the problem of sensitivity is poor, and the leakage point for small-bore
The problem of missing inspection be present, still lack effective solution.
The content of the invention
The utility model is overcome in the prior art for high pressure (above-critical state or close phase) CO to solve the above problems2
Leak point positioning present in pipe detection is inaccurate, precision is low, detection efficiency is low and real-time, the problem of sensitivity is poor,
And the problem of missing inspection be present for the leakage point of small-bore, there is provided a kind of Compressed CO_2 pipeline leakage checking system.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of Compressed CO_2 pipeline leakage checking system, the system include sensor fibre, main frame, signal processing apparatus and master
Control system, the sensor fibre are arranged in Compressed CO_2 pipeline lower soil, and the sensor fibre is connected with the main frame, institute
State sensor fibre and receive the signal that the main frame is sent, and feedback signal to main frame, the main frame extremely believes feedback signal transmission
Number processing unit is handled, and the signal processing apparatus is connected with the master control system；
The main frame includes laser pulse light supply apparatus, scattering light separator, Electro-Optical Sensor Set and thermostat, institute
State laser pulse light source to send pulse signal to the sensor fibre, the feedback signal of the sensor fibre is successively by described
Thermostat, light separator and Electro-Optical Sensor Set are scattered to the signal processing apparatus.
Further, the master control system includes server, display unit, alarm unit and database；The server
It is connected respectively with the display unit, the alarm unit and the database；
The recording unit when server is configured as the setting unit of systematic parameter, real-time monitoring unit sum factually,
And the data transfer recorded in real time to database is stored；
The display unit is configured as the figure shows of the Real-time Feedback signal after display processing and CO2 pipe leakage points
Unit, the Real-time Feedback signal after processing are shown by the form of track；
The alarm unit is configured as the unit for detecting with being alarmed during CO2 pipe leakage points；
The database is configured as storing the unit of the feedback signal of sensor fibre.
Further, the master control system sends the systematic parameter of setting to the laser pulse by signal generator
Light supply apparatus, the laser pulse light supply apparatus is controlled to produce corresponding pulse signal.
Further, the thermostat is configured to supply the sensor fibre robot scaling equipment of reference temperature.
Further, the laser pulse light supply apparatus includes high impulse semiconductor laser and drive circuit, the drive
Dynamic circuit receives the signal of the signal generator transmission, and drives the high impulse semiconductor laser to produce corresponding arteries and veins
Rush signal.
Further, the scattering light separator includes bidirectional coupler and wavelength division multiplexer, the bidirectional coupler
Connected with the wavelength division multiplexer.
Further, the bidirectional coupler includes light emitting diode and photosensitive two-way pipe, the bidirectional coupler it is defeated
It is that light emitting diode, output stage are photosensitive two-way pipes to enter level.
Further, the Electro-Optical Sensor Set includes photodiode and main amplifier, the photodiode difference
It is connected with the wavelength division multiplexer and main amplifier.
Further, the photodiode is using the avalanche photodide with tail optical fiber, with preamplifier.
Further, the signal processing apparatus includes A/D collecting units and signal processing unit, and the A/D collections are single
The amplified signal of member collection main amplifier output, and A/D conversions are carried out, the signal processing unit is to the amplification after A/D conversions
Signal is nursed one's health, cumulative mean and denoising.
Principle of the present utility model is：
The principle that the utility model carries out Compressed CO_2 pipeline leakage testing mainly includes three parts：Joule-thompson is imitated
Should, Raman principle and optical time domain reflection principle.
Raman principle：India's scientist's Raman is found that in CCl4 spectrum when light and after interaction of molecules first, one
The wavelength of part light can change (color changes), by for these colors change scattering light research,
It can obtain the information of molecule.And Raman scattering is because molecular thermalmotion causes, so Raman diffused light can carry scattering point
Temperature information.
Joule-Thompson effect：When Compressed CO_2 pipeline leaks, because CO2 physical property is different from oil gas, it may occur that
Strong throttle effect (joule-Thompson effect), the CO2 fluid temperature (F.T.)s leaking into soil significantly drop compared to surrounding environment
It is low, reachable -78 DEG C there are some researches show minimum temperature.So as to cause the temperature that sensor fibre is detected at leakage point to occur violent
Change, alarm is sent when reaching setting value.
Optical time domain reflection principle：The position of leakage point is measured by optical time domain reflection technology, and optical fiber is sent out first
Go out signal, the information that then observation signal returns from certain point again, so repeatedly, then these information that will be observed that are handled
And showed in the form of track, and this track is described be exactly whole section of optical fiber state.Dissipated according to the time domain of optical fiber
The principle penetrated, the position of leakage point is can obtain by the calculation formula of optical time domain reflection range determination.Thus, distribution type fiber-optic leaks
Detecting system can fully achieve the positioning to CO2 leakage points.
The beneficial effects of the utility model：
1st, a kind of Compressed CO_2 pipeline leakage checking system of the present utility model, creative combines：Joule-thompson
Effect, Raman principle and optical time domain reflection principle, effectively realize in high pressure (above-critical state or close phase) CO2 pipeline leakage testings
Leak point positioning it is accurate, precision is high, detection efficiency is high and has effectively heightened the real-time and sensitivity of whole detecting system,
It is big without setting meanwhile the utility model covers whole high pressure (above-critical state or close phase) CO2 conduit regions using sensor fibre
Amount temperature sensor, the problem of avoiding the maintenance issues and high cost of temperature sensor.
2nd, a kind of Compressed CO_2 pipeline leakage checking system of the present utility model, there is provided thermostat and bidirectional coupler,
Thermostat：For solving the calibration of sensor fibre, there is provided reference temperature；Bidirectional coupler：For driving bidirectional thyristor, carry
High control precision, input stage are light emitting diodes, and output stage is photosensitive two-way pipe；Effectively increase the accuracy of measurement result；
The utility model uses the photodiode with more preferable optical detection ability simultaneously, in photodetector unit and signal transacting list
Amplifier is set between member, electric signal is amplified, improves accuracy of detection.
3rd, a kind of Compressed CO_2 pipeline leakage checking system of the present utility model, high pressure (above-critical state or close phase) CO2 pipelines
The sensor fibre of lower setting is supervised in real time to the soil moisture of whole high pressure (above-critical state or close phase) CO2 Near Pipelines in real time
Survey, master control system records Monitoring Data in real time, and the data transfer recorded in real time to database is stored, and effectively realizes
The real-time of Compressed CO_2 pipeline leakage checking system.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model.
Embodiment：
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Track machine used in specific embodiment of the present utility model is also referred to as Carriageway controlling machine in this area.
In the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.Tie below
Closing accompanying drawing, the utility model is described in further detail with embodiment.
Embodiment 1：
The utility model is overcome in the prior art for high pressure (above-critical state or close phase) CO to solve the above problems2
Leak point positioning present in pipe detection is inaccurate, precision is low, detection efficiency is low and real-time, the problem of sensitivity is poor,
And the problem of missing inspection be present for the leakage point of small-bore, there is provided a kind of Compressed CO_2 pipeline leakage checking system and method.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of Compressed CO_2 pipeline leakage checking system, as shown in figure 1, the system includes sensor fibre, main frame, at signal
Reason device and master control system, the sensor fibre are arranged in Compressed CO_2 pipeline lower soil, the sensor fibre and the master
Machine connects, and the sensor fibre receives the signal that the main frame is sent, and feedback signal is to main frame, and the main frame is by feedback signal
Transmit to signal processing apparatus and handled, the signal processing apparatus is connected with the master control system；
The main frame includes laser pulse light supply apparatus, scattering light separator, Electro-Optical Sensor Set and thermostat, institute
State laser pulse light source to send pulse signal to the sensor fibre, the feedback signal of the sensor fibre is successively by described
Thermostat, light separator and Electro-Optical Sensor Set are scattered to the signal processing apparatus.
In the present embodiment, when Compressed CO_2 pipeline leaks, because CO2 physical property is different from oil gas, it may occur that strong
Throttle effect (joule-Thompson effect), the CO2 fluid temperature (F.T.)s leaking into soil are greatly lowered compared to surrounding environment,
Reachable -78 DEG C of minimum temperature.Therefore, used sensor fibre is required to withstand -78 DEG C of low temperature, the sensor fibre
Outer surface use low temperature coating.
The master control system includes server, display unit, alarm unit and database；The server respectively with it is described
Display unit, the alarm unit connect with the database；
The recording unit when server is configured as the setting unit of systematic parameter, real-time monitoring unit sum factually,
And the data transfer recorded in real time to database is stored；
The display unit is configured as the figure shows of the Real-time Feedback signal after display processing and CO2 pipe leakage points
Unit, the Real-time Feedback signal after processing are shown by the form of track；
The alarm unit is configured as the unit for detecting with being alarmed during CO2 pipe leakage points；
The database is configured as storing the unit of the feedback signal of sensor fibre.
The master control system sends the systematic parameter of setting to the laser pulse light supply apparatus by signal generator,
The laser pulse light supply apparatus is controlled to produce corresponding pulse signal.
The thermostat is configured to supply the sensor fibre robot scaling equipment of reference temperature.
The laser pulse light supply apparatus includes high impulse semiconductor laser and drive circuit, and the drive circuit receives
The signal of the signal generator transmission, and drive the high impulse semiconductor laser to produce corresponding pulse signal.
The scattering light separator includes bidirectional coupler and wavelength division multiplexer, the bidirectional coupler and the wavelength-division
Multiplexer connects, and the bidirectional coupler, which includes light emitting diode and photosensitive two-way pipe, the input stage of the bidirectional coupler, is
Light emitting diode, output stage are photosensitive two-way pipes.In the present embodiment, for the bidirectional coupler in conducting, what is flowed through is two-way
For electric current up to 100 milliamperes, pressure drop is less than 3 volts, and extinction current is 100 microamperes during conducting.The bidirectional coupler cut-off when,
Its blocking voltage is 250 volts of direct current, and when maintaining electric current to be less than 100 microamperes, two-way pipe is changed into ending from conducting.Work as blocking voltage
More than 250 volts, or during lumination of light emitting diode, then two-way pipe conducting.
The Electro-Optical Sensor Set includes photodiode and main amplifier, the photodiode respectively with the wavelength-division
Multiplexer connects with main amplifier；The photodiode is using the avalanche photodide with tail optical fiber, with preamplifier.
The signal processing apparatus includes A/D collecting units and signal processing unit, and the A/D collecting units collection master is put
The amplified signal of big device output, and A/D conversions are carried out, the amplified signal after the signal processing unit is changed to A/D is adjusted
Reason, cumulative mean and denoising.
Principle of the present utility model is：
The principle that the utility model carries out Compressed CO_2 pipeline leakage testing mainly includes three parts：Joule-thompson is imitated
Should, Raman principle and optical time domain reflection principle.
Raman principle：India's scientist's Raman is found that in CCl4 spectrum when light and after interaction of molecules first, one
The wavelength of part light can change (color changes), by for these colors change scattering light research,
It can obtain the information of molecule.And Raman scattering is because molecular thermalmotion causes, so Raman diffused light can carry scattering point
Temperature information.
Joule-Thompson effect：When Compressed CO_2 pipeline leaks, because CO2 physical property is different from oil gas, it may occur that
Strong throttle effect (joule-Thompson effect), the CO2 fluid temperature (F.T.)s leaking into soil significantly drop compared to surrounding environment
It is low, reachable -78 DEG C there are some researches show minimum temperature.So as to cause the temperature that sensor fibre is detected at leakage point to occur violent
Change, alarm is sent when reaching setting value.
Optical time domain reflection principle：The position of leakage point is measured by optical time domain reflection technology, and optical fiber is sent out first
Go out signal, the information that then observation signal returns from certain point again, so repeatedly, then these information that will be observed that are handled
And showed in the form of track, and this track is described be exactly whole section of optical fiber state.Dissipated according to the time domain of optical fiber
The principle penetrated, the position of leakage point is can obtain by the calculation formula of optical time domain reflection range determination.Thus, distribution type fiber-optic leaks
Detecting system can fully achieve the positioning to CO2 leakage points.
The beneficial effects of the utility model：
1st, the detection method of a kind of Compressed CO_2 pipeline leakage checking system of the present utility model, creative combines：It is burnt
Ear-Thompson effect, Raman principle and optical time domain reflection principle, effectively realize high pressure (above-critical state or close phase) CO2 pipelines
Leak point positioning in leak detection is accurate, precision is high, detection efficiency is high and has effectively heightened the real-time of whole detecting system
And sensitivity, meanwhile, the utility model covers whole high pressure (above-critical state or close phase) CO2 conduit regions using sensor fibre,
A large amount of temperature sensors need not be set, the problem of avoiding the maintenance issues and high cost of temperature sensor.
2nd, a kind of Compressed CO_2 pipeline leakage checking system of the present utility model, there is provided thermostat and bidirectional coupler,
Thermostat：For solving the calibration of sensor fibre, there is provided reference temperature；Bidirectional coupler：For driving bidirectional thyristor, carry
High control precision, input stage are light emitting diodes, and output stage is photosensitive two-way pipe；Effectively increase the accuracy of measurement result；
The utility model uses the photodiode with more preferable optical detection ability simultaneously, in photodetector unit and signal transacting list
Amplifier is set between member, electric signal is amplified, improves accuracy of detection.
3rd, a kind of Compressed CO_2 pipeline leakage checking system of the present utility model, high pressure (above-critical state or close phase) CO2 pipelines
The sensor fibre of lower setting is supervised in real time to the soil moisture of whole high pressure (above-critical state or close phase) CO2 Near Pipelines in real time
Survey, master control system records Monitoring Data in real time, and the data transfer recorded in real time to database is stored, and effectively realizes
The real-time of Compressed CO_2 pipeline leakage checking system.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (10)
1. a kind of Compressed CO_2 pipeline leakage checking system, it is characterized in that：The system includes sensor fibre, main frame, signal processing device
Put and master control system, the sensor fibre are arranged in Compressed CO_2 pipeline lower soil, the sensor fibre connects with the main frame
Connect, the sensor fibre receives the signal that the main frame is sent, and feedback signal is to main frame, and the main frame is by feedback signal transmission
Handled to signal processing apparatus, the signal processing apparatus is connected with the master control system；
The main frame includes laser pulse light supply apparatus, scattering light separator, Electro-Optical Sensor Set and thermostat, described to swash
Optical pulse light source sends pulse signal to the sensor fibre, the feedback signal of the sensor fibre passes through the constant temperature successively
Device, light separator and Electro-Optical Sensor Set are scattered to the signal processing apparatus.
2. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 1, it is characterized in that：The master control system includes
Server, display unit, alarm unit and database；The server respectively with the display unit, the alarm unit and
The database connection；
The recording unit when server is configured as the setting unit of systematic parameter, real-time monitoring unit sum factually, and will
The data transfer recorded in real time to database is stored；
The display unit is configured as the Real-time Feedback signal after display processing and the figure shows list of CO2 pipe leakage points
Member, the Real-time Feedback signal after processing are shown by the form of track；
The alarm unit is configured as the unit for detecting with being alarmed during CO2 pipe leakage points；
The database is configured as storing the unit of the feedback signal of sensor fibre.
3. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 1, it is characterized in that：The master control system will be set
The systematic parameter put is sent to the laser pulse light supply apparatus by signal generator, controls the laser pulse light supply apparatus
Produce corresponding pulse signal.
4. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 1, it is characterized in that：The thermostat by with
It is set to the sensor fibre robot scaling equipment that reference temperature is provided.
5. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 3, it is characterized in that：The laser pulse light source
Device includes high impulse semiconductor laser and drive circuit, and the drive circuit receives the letter of the signal generator transmission
Number, and drive the high impulse semiconductor laser to produce corresponding pulse signal.
6. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 1, it is characterized in that：The scattering light separation dress
Put including bidirectional coupler and wavelength division multiplexer.
7. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 6, it is characterized in that：The bidirectional coupler and
The wavelength division multiplexer connection, the bidirectional coupler include light emitting diode and photosensitive two-way pipe, the bidirectional coupler
Input stage is that light emitting diode, output stage are photosensitive two-way pipes.
8. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 6, it is characterized in that：The Electro-Optical Sensor Set
Including photodiode and main amplifier, the photodiode is connected with the wavelength division multiplexer and main amplifier respectively.
9. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 8, it is characterized in that：The photodiode is adopted
With the avalanche photodide with tail optical fiber, with preamplifier.
10. a kind of Compressed CO_2 pipeline leakage checking system as claimed in claim 1, it is characterized in that：The signal processing apparatus
Including A/D collecting units and signal processing unit, the amplified signal of the A/D collecting units collection main amplifier output, go forward side by side
Row A/D is changed, the signal processing unit A/D is changed after amplified signal nursed one's health, cumulative mean and denoising.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720208405.3U CN206723847U (en) | 2017-03-06 | 2017-03-06 | A kind of high pressure CO2Pipeline leakage checking system |
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678551A (en) * | 2017-03-06 | 2017-05-17 | 中国石油大学(华东) | Leakage detecting system and method for high-pressure CO2 pipeline |
| CN111120877A (en) * | 2019-12-12 | 2020-05-08 | 同济大学 | Drainage pipe network leakage monitoring equipment based on distributed optical fiber temperature measurement |
| EP3917719A4 (en) * | 2019-01-31 | 2023-03-22 | Fusion Coolant Systems, Inc. | Machining systems utilizing supercritical fluids |
-
2017
- 2017-03-06 CN CN201720208405.3U patent/CN206723847U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678551A (en) * | 2017-03-06 | 2017-05-17 | 中国石油大学(华东) | Leakage detecting system and method for high-pressure CO2 pipeline |
| EP3917719A4 (en) * | 2019-01-31 | 2023-03-22 | Fusion Coolant Systems, Inc. | Machining systems utilizing supercritical fluids |
| CN111120877A (en) * | 2019-12-12 | 2020-05-08 | 同济大学 | Drainage pipe network leakage monitoring equipment based on distributed optical fiber temperature measurement |
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