CN205826529U - A kind of heavy oil based on non-dispersion infrared principle volatilization detection device - Google Patents
A kind of heavy oil based on non-dispersion infrared principle volatilization detection device Download PDFInfo
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- CN205826529U CN205826529U CN201620483962.1U CN201620483962U CN205826529U CN 205826529 U CN205826529 U CN 205826529U CN 201620483962 U CN201620483962 U CN 201620483962U CN 205826529 U CN205826529 U CN 205826529U
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Abstract
The utility model discloses a kind of heavy oil based on non-dispersion infrared principle volatilization detection device, including middle infrared laser, motor, external modulation optical filter, reflecting optics group, dual wavelength pyroelectric infrared detector, two full-bridge rectifiers and difference amplifier.This utility model uses middle infrared laser to launch non-dispersive and powerful infrared laser light source, and use optics external modulation technology to make the powerful infrared light supply itself can be luminous with continuous-stable, realize multiple reflections by reflecting optics group and increase the sensitivity with raising gas detecting of the logical light path, and use dual wavelength and differential amplification to realize the impact of the gas detecting accuracy that Differential Detection deduction infrared light supply own power fluctuation causes.
Description
Technical field
This utility model relates to volatilization gas detection technique field, is specifically related to a kind of weight based on non-dispersion infrared principle
Oil volatilization detection device.
Background technology
Pipe-line equipment is used for carrying oil gas and has more advantages, it is simple to managing and control, cost is the most relatively low simultaneously.But
Along with long service wear, the reason such as natural aging of equipment, leakage failure happens occasionally, particularly petroleum chemical industry
Conveyance conduit once there is leakage accident, will result in serious environmental pollution and peril, bring substantial amounts of economic loss.
Scope and the degree of setting up pipe leakage fault monitoring system report accident promptly and accurately can reduce economy to greatest extent
Loss and environmental pollution.
The gas evaporated due to oil belongs to fuel gas, the most generally uses the mode of fuel gas detection right
Leakage detects and quantifies, but after heavy oil spill, owing to its volatile performance is very poor, does not reaches the 1% of LEL, traditional type
Catalysis burning and the combustible gas probe of electrochemical reaction formula be nearly no detectable, the most numerous heavy oil of this point
Storage and transportation apparatus accident is not uncommon for.
Additionally it is catalyzed the catalyst failure of burning and the poisoning of catalyst, is the fatal disadvantage of this sensor.Catalysis burning
All there is factors of limit life in sensor, MaLS is in air 2 years, and sensitivity will constantly decline the most after six months, needs
Use can be maintained by debugging repeatedly.
The combustible gas detecting device of common infrared type is also due to electrical modulation infrared light supply power is less, it is impossible to use repeatedly
Reflecting optics lengthens logical light path and improves accuracy of detection, it is difficult to realize the detection of the heavy oil volatile matter of low concentration.
Utility model content
In order to overcome the deficiencies in the prior art, this utility model provides a kind of heavy oil based on non-dispersion infrared principle and waves
Send out detection device.
The technical scheme that this utility model solves above-mentioned technical problem is as follows:
This utility model provides a kind of heavy oil based on non-dispersion infrared principle volatilization detection device, swashs including mid-infrared
Light device, motor, external modulation optical filter, reflecting optics group, dual wavelength pyroelectric infrared detector, two full-bridge rectifiers and difference
Amplifier；
Described external modulation optical filter is fixed in the rotating shaft of described motor, and described middle infrared laser, described external modulation are filtered
Mating plate and described reflecting optics group light path successively are of coupled connections, and described reflecting optics group is visited with described dual wavelength rpyroelectric infrared
Surveying device light path to connect, described dual wavelength pyroelectric infrared detector and two full-bridge rectifiers are all electrically connected with, each full-bridge
Commutator is all electrically connected with described difference amplifier, and wherein, described reflecting optics group is placed in tested volatilization gas environment.
The beneficial effects of the utility model are: use middle infrared laser to launch non-dispersive and powerful iraser
Light source, and use optics external modulation technology to make powerful infrared light supply itself can pass through reflecting mirror with continuous-stable luminescence
Sheet group realizes multiple reflections increases the sensitivity with raising gas detecting of the logical light path, and uses dual wavelength and differential amplification
Realize the impact of the gas detecting accuracy that Differential Detection deduction infrared light supply own power fluctuation causes.
On the basis of technique scheme, this utility model can also make following improvement.
Further, described middle infrared laser is 2～5um for launching wavelength after being heated by metal alloy wires, merit
The luminescent device of the rate mid-infrared light source more than 2W.
Described further to have the beneficial effect that middle infrared laser launches the wavelength of mid-infrared light source be 2～5um, merit
Rate is more than 2W, belongs to nondispersive infrared light supply (2～5um wavelength ratio comparatively denses are concentrated) and powerful infrared light supply, infrared
The signal of light source is strong.
Further, described external modulation optical filter is the light barrier being fixed on machine shaft.
Described further have the beneficial effect that middle infrared laser along with the rotation of motor, is launched by external modulation optical filter
Mid-infrared light source periodically stop, produce light and shade modulation, by regulation motor rotating speed can realize mid-infrared light
The frequency of source light and shade modulation.
Further, described reflecting optics group includes that the first eyeglass that two radiuses are identical and a radius are the first eyeglass
Second eyeglass of radius twice, two the first eyeglasses are positioned on same plane, and the second eyeglass and two the first eyeglasses are the most right
Face is placed.
Described further having the beneficial effect that uses 3 eyeglasses composition reflecting optics groups so that light is between each eyeglass
Roundtrip increases the path that light passes through in the space of tested volatilization gas, detects tested volatilization gas to improve
Sensitivity.
Further, described dual wavelength pyroelectric infrared detector is the infrared detector with two photosurfaces.
Described further have the beneficial effect that dual wavelength pyroelectric infrared detector is by the optical signal of detected gas and ginseng
The optical signal examining gas is separated, and utilizes calculus of finite differences detected gas, it is possible to eliminate the impact that the fluctuation of light source own power causes.
Accompanying drawing explanation
A kind of based on non-dispersion infrared principle the heavy oil volatilization detection device that Fig. 1 provides for this utility model embodiment connects
Connect schematic diagram.
In accompanying drawing, the title of each parts that each label is corresponding is as follows:
1, middle infrared laser, 2, motor, 3, external modulation optical filter, 4, reflecting optics group, 5, dual wavelength rpyroelectric infrared
Detector, 6, full wave rectifier, 7, difference amplifier.
Detailed description of the invention
Being described principle of the present utility model and feature below in conjunction with accompanying drawing, example is served only for explaining this practicality
Novel, it is not intended to limit scope of the present utility model.
Embodiment, a kind of heavy oil based on non-dispersion infrared principle volatilization detection device.
Seeing Fig. 1, the heavy oil volatilization detection device that the present embodiment provides includes middle infrared laser 1, motor 2, external modulation
Optical filter 3, reflecting optics group 4,5, two full-bridge rectifiers 6 of dual wavelength pyroelectric infrared detector and difference amplifier 7；Described
External modulation optical filter 3 is fixed in the rotating shaft of described motor 2, described middle infrared laser 1, described external modulation optical filter 3 and
Described reflecting optics group 4 light path successively is of coupled connections, described reflecting optics group 4 and described dual wavelength pyroelectric infrared detector 5
Light path connects, and described dual wavelength pyroelectric infrared detector 5 is all electrically connected with two full-bridge rectifiers 6, and each full-bridge is whole
Stream device 6 is all electrically connected with described difference amplifier 7, and wherein, described reflecting optics group 4 is placed in tested volatilization gas environment.
Wherein, described middle infrared laser 1 is 2～5um for launching wavelength after being heated by metal alloy wires, and power is big
In the luminescent device of the mid-infrared light source of 2W, described external modulation optical filter 3 is the light barrier being fixed in motor 2 rotating shaft.
Described reflecting optics group 4 includes that the first eyeglass that two radiuses are identical and a radius are the first eyeglass radius twice
The second eyeglass, two the first eyeglasses are positioned on same plane, and the second eyeglass and two the first eyeglass opposites each other are placed.Institute
Stating dual wavelength pyroelectric infrared detector 5 is the infrared detector with two photosurfaces.
The heavy oil volatilization using the present embodiment to provide detects the operation principle of device: middle infrared laser launches wavelength
Be 2～5um, power more than the infrared light supply of 2W, through external modulation optical filter, it is carried out light and shade modulation, the frequency of light and shade modulation
The speed of external modulation optical filter rotation can be driven by the rotating speed of regulation motor.Carry out the optical signal after light and shade modulation incident anti-
Penetrating lens set, reflecting optics group is made up of 3 coquillees, and optical signal roundtrip between 3 eyeglasses of reflecting optics group increases
(wherein, reflecting optics group is placed in tested volatilization gas environment to add the path that light passes through in the space of detected gas
In), improve the susceptiveness of tested volatilization gas detection.Optical signal after reflecting optics group is red through dual wavelength pyroelectricity
Two-way ac voltage signal it is converted into after external detector.Two-way ac voltage signal corresponding wavelength respectively is 3.4um's and 4.0um
The light intensity of wavelength component, wherein, wavelength be the light intensity of the wavelength component of 3.4um corresponding through after tested volatilization gas
Light signal strength, wavelength be the light intensity of the wavelength component of 4.0um corresponding for through the light signal strength after reference gas.
Two-way ac voltage signal changes into d. c. voltage signal, the two-way after then converting respectively through full-bridge rectifier
D. c. voltage signal is converted into difference voltage signal by difference amplifier and exports as result, wherein, and the concentration of reference gas
Value is known, according to concentration value and the difference signal of reference gas, can learn the concentration of detected gas.
Heavy oil based on the non-dispersion infrared principle volatilization detection device that this utility model provides, uses middle infrared laser
Launch non-dispersive and powerful infrared laser light source, and use optics external modulation technology to make powerful infrared light supply originally
Body can be luminous with continuous-stable, and realizing multiple reflections by reflecting optics group increases logical light path to improve the sensitive of gas detecting
Degree, and use dual wavelength and differential amplification to realize the gas inspection that Differential Detection deduction infrared light supply own power fluctuation causes
Survey the impact of accuracy.
In the description of this specification, reference term " embodiment one ", " example ", " concrete example " or " some examples "
Deng description means to combine this embodiment or example describes concrete grammar, device or feature be contained in of the present utility model extremely
In a few embodiment or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical
Embodiment or example.And, the specific features of description, method, device or feature can with one or more embodiments in office or
Example combines in an appropriate manner.Additionally, in the case of the most conflicting, those skilled in the art can be by this explanation
Different embodiments or the feature of example and different embodiment or example described in book are combined and combine.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in guarantor of the present utility model
Within the scope of protecting.
Claims (5)
1. heavy oil based on a non-dispersion infrared principle volatilization detection device, it is characterised in that include middle infrared laser
(1), motor (2), external modulation optical filter (3), reflecting optics group (4), dual wavelength pyroelectric infrared detector (5), two full-bridges
Commutator (6) and difference amplifier (7)；
Described external modulation optical filter (3) is fixed in the rotating shaft of described motor (2), described middle infrared laser (1), described investigation mission outside the city or town
Optical filter processed (3) and described reflecting optics group (4) light path successively are of coupled connections, described reflecting optics group (4) and described double wave
Long pyroelectric infrared detector (5) light path connects, described dual wavelength pyroelectric infrared detector (5) and two full-bridge rectifiers
(6) being all electrically connected with, each full-bridge rectifier (6) is all electrically connected with described difference amplifier (7), wherein, and described reflection
Lens set (4) is placed in tested volatilization gas environment.
2. heavy oil based on non-dispersion infrared principle volatilization detection device as claimed in claim 1, it is characterised in that in described
Infrared laser (1) is 2～5um for launching wavelength after being heated by metal alloy wires, the power mid-infrared light source more than 2W
Luminescent device.
3. heavy oil based on non-dispersion infrared principle volatilization detection device as claimed in claim 2, it is characterised in that outside described
Modulation optical filter (3) is for be fixed on the light barrier in motor (2) rotating shaft.
4. heavy oil based on non-dispersion infrared principle volatilization detection device as claimed in claim 1, it is characterised in that described instead
Penetrate the first eyeglass that lens set (4) includes that two radiuses are identical and the second eyeglass that radius is the first eyeglass radius twice,
Two the first eyeglasses are positioned on same plane, and the second eyeglass and two the first eyeglass opposites each other are placed.
5. heavy oil based on non-dispersion infrared principle volatilization detection device as claimed in claim 1, it is characterised in that described double
Wavelength pyroelectric infrared detector (5) is the infrared detector with two photosurfaces.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620483962.1U CN205826529U (en) | 2016-05-25 | 2016-05-25 | A kind of heavy oil based on non-dispersion infrared principle volatilization detection device |
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| CN201620483962.1U CN205826529U (en) | 2016-05-25 | 2016-05-25 | A kind of heavy oil based on non-dispersion infrared principle volatilization detection device |
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| CN205826529U true CN205826529U (en) | 2016-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411971A (en) * | 2019-08-08 | 2019-11-05 | 大连世有电力科技有限公司 | A kind of on-Line Monitor Device of methane and non-methane total hydrocarbons content |
-
2016
- 2016-05-25 CN CN201620483962.1U patent/CN205826529U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411971A (en) * | 2019-08-08 | 2019-11-05 | 大连世有电力科技有限公司 | A kind of on-Line Monitor Device of methane and non-methane total hydrocarbons content |
| CN110411971B (en) * | 2019-08-08 | 2021-11-23 | 大连世有电力科技有限公司 | On-line monitoring device for methane and non-methane total hydrocarbon content |
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