CN107727584A - Gas on-line monitoring method in a kind of high-voltage switch gear - Google Patents
Gas on-line monitoring method in a kind of high-voltage switch gear Download PDFInfo
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- CN107727584A CN107727584A CN201710874113.8A CN201710874113A CN107727584A CN 107727584 A CN107727584 A CN 107727584A CN 201710874113 A CN201710874113 A CN 201710874113A CN 107727584 A CN107727584 A CN 107727584A
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- G—PHYSICS
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- 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
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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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
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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Abstract
The invention discloses gas on-line monitoring method in a kind of high-voltage switch gear, including：Detection light is sent to window with the window being right against on high-voltage switch gear pipeline, the window is the window for realizing high-voltage switch gear preset function itself；The incident light for entering in high-voltage switch gear pipeline, being returned after being scattered by inner-walls of duct by window of detection light is received, and obtains the spectral information of light；By the spectral information of the return light of acquisition, contrasted and analyzed with the spectral information of the reference light of acquisition after reference gas, obtain being detected the concentration information of gas in high-voltage switch gear pipeline.Gas on-line monitoring method in high-voltage switch gear of the present invention, outside high-voltage switch gear, detection light is propagated into high-voltage switch gear using the window on high-voltage switch gear pipeline, make gas in detection light-transmissive high-voltage switch gear, the on-line monitoring to being detected gas concentration in high-voltage switch gear can be achieved, this method need not change high-voltage switch gear structure.
Description
Technical field
The present invention relates to field of gas detection, more particularly to gas on-line monitoring method in a kind of high-voltage switch gear.
Background technology
SF6High-voltage electrical equipment in operation, can make sulfur hexafluoride (SF due to reasons such as electric discharges6) gas constantly decomposes.
Hydrogen fluoride (HF) is most important one kind in these catabolites, carries out analysis detection to this product, it may be appreciated that High-Voltage Electrical Appliances
The generation of equipment state in which and possible latent defect in the process of running, help to ensure that normal operation and the people of equipment
Body safety.Because in the environment of it vapor be present, hydrogen fluoride meets water electrode and easily forms hydrofluoric acid, and corrosivity aggravates, and endangers high pressure
The safety of switchgear.
But the hydrogen fluoride gas in sulfur hexafluoride gas is not easy to detect very much, this is primarily due to：1. hydrogen fluoride
Growing amount of the gas under particular event is considerably less, and content is ppm ranks；2. hydrogen fluoride gas depositing in sulfur hexafluoride gas
Shorter in the time, hydrogen fluoride meets water electrode and easily forms hydrofluoric acid.Therefore, it is still gas accurately and reliably to detect hydrogen fluoride online
One of difficult point in the detection of insulated switching installation (Gas Insulated Switchgear, GIS) gas.
In the prior art, the sensor for being used to monitor hydrogen fluoride gas content in high-voltage switch gear used is, it is necessary to be arranged on
Inside high-voltage switch gear.Therefore, the installment work of such instrumentation involves changes to the part of high-voltage switch gear structure,
In view of the particularity of high-voltage switch gear, clearly implements carefully concerning electric power safety, therefore in no full assurance and national correlation department
In the case of then, such product temporarily can not also be promoted the use of in power system, and its application on site also has certain difficulty.
The content of the invention
It is an object of the invention to provide gas on-line monitoring method in a kind of high-voltage switch gear.It can be achieved to gas in high-voltage switch gear
The on-line monitoring of body, and high-voltage switch gear structure need not be changed.
To achieve the above object, the present invention provides following technical scheme：
Gas on-line monitoring method in a kind of high-voltage switch gear, including：
Detection light is sent to the window with the window being right against on high-voltage switch gear pipeline, the window is for realizing
State the window of high-voltage switch gear preset function itself；
Receive detection light incidence to enter in the high-voltage switch gear pipeline, returned after being scattered by inner-walls of duct by the window
Light, and obtain the spectral information of light；
By the spectral information of the return light of acquisition, carried out pair with the spectral information of the reference light of acquisition after reference gas
Than and analysis, obtain in the high-voltage switch gear pipeline be detected gas concentration information.
Alternatively, the window is the overhauls window being arranged on the high-voltage switch gear pipeline.
Alternatively, wedge-shaped medium is set at the window.
Alternatively, the optical system used includes the first light source, beam splitting element, reference gas chamber, the first reflecting element, second
Reflecting element, the 3rd reflecting element, the first detector, the second detector and signal processing apparatus；
First light source is used to send laser；
The beam splitting element is used to the light that sends first light source and separated a branch of as reference light and by reference light draw
Importing is incident upon the reference gas chamber, separates another Shu Zuowei detection light and detection light guiding is incident into described first reflective yuan
Part, the reference gas chamber are interior filled with the mixed gas that gas is detected comprising preset concentration；
First detector is used to receive the light being emitted by the reference gas chamber and is converted to electric signal；
First reflecting element is used to detection light guiding inciding injectron road；
Second reflecting element is used to receiving that detection light to be incident enters high-voltage switch gear, returned after internal gas
Light, and light is converged into the 3rd reflecting element；
3rd reflecting element is used to light reflexing to second detector, is received and is turned by second detector
It is changed to electric signal；
The signal processing apparatus is respectively connected with first detector and second detector, for believing detection
Number and reference signal handled, contrasted and analyzed, obtain the concentration information of detected gas.
Alternatively, in addition to for sending the secondary light source of visible ray；
The visible ray that the secondary light source is sent incides first reflecting element, and first reflecting element will be seen that
Injectron road is incided in light guiding, and second reflecting element receives visible ray incidence and enters high-voltage switch gear, by inside
The light returned after gas, and light is converged into the 3rd reflecting element.
Alternatively, first reflecting element is the prism with the first right-angle surface and the second right-angle surface, and described first
Right-angle surface and second right-angle surface form same right angle, and first right-angle surface and second right-angle surface are reflecting surface；
The visible ray that detection light, the secondary light source being emitted by the beam splitting element are sent incides described first respectively
The first right-angle surface and the second right-angle surface of reflecting element.
Alternatively, it is provided between the beam splitting element and first reflecting element for the beam splitting element to be sent out
The detection light gone out incides the 4th reflecting element of first reflecting element；
And/or it is provided between the secondary light source and first reflecting element for the secondary light source to be sent out
The visible ray gone out incides the 5th reflecting element of first reflecting element.
Alternatively, second reflecting element is provided with the hole being used for by light, by the 3rd reflecting element reflection
Light incides second detector by the hole.
Alternatively, in the centrally disposed hole being used for by light of second reflecting element, the 3rd reflecting element, institute
The center line for stating the second reflecting element and second detector overlaps.
Alternatively, first light source is the wavelength and the adjustable tunable laser of line width of output laser.
As shown from the above technical solution, gas on-line monitoring method in high-voltage switch gear provided by the present invention, passes through high pressure
The emission detection light into high-voltage switch gear of the window on pipeline is switched, light is detected in high-voltage switch gear and is irradiated to through gas in pipeline
Wall is simultaneously scattered, and some scattered light is projected by window, is received and obtains its spectral information, further returning according to acquisition
Spectral information of the spectral information and reference light of light echo after reference gas, is contrasted and is analyzed, obtain high-voltage switch gear
The concentration information of interior detected gas.
Gas on-line monitoring method in high-voltage switch gear of the present invention, outside high-voltage switch gear, using on high-voltage switch gear pipeline
Window propagates detection light into high-voltage switch gear, makes gas in detection light-transmissive high-voltage switch gear, realizes to being visited in high-voltage switch gear
The on-line monitoring of gas concentration is surveyed, compared with the conventional method, this method need not change high-voltage switch gear structure.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of gas on-line monitoring method in a kind of high-voltage switch gear provided in an embodiment of the present invention；
Fig. 2 is to detect light light path schematic diagram in high-voltage switch gear provided in an embodiment of the present invention in gas on-line monitoring method；
Fig. 3 is a kind of schematic diagram of the optical system used in present invention method；
Fig. 4 is the schematic diagram of another optical system used in present invention method.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
It refer to Fig. 1, gas on-line monitoring method in a kind of high-voltage switch gear provided in an embodiment of the present invention, including step：
S10：Detection light is sent to the window with the window being right against on high-voltage switch gear pipeline, the window is for reality
The window of preset function of the existing high-voltage switch gear itself.
The window is the window for realizing high-voltage switch gear preset function itself, as realizes high-voltage switch gear preset function
The window having in itself on high-voltage switch gear pipeline.Exemplary, window can be provided in the maintenance on high-voltage switch gear pipeline
Window.It is understood that the other function windows that can be used on high-voltage switch gear can also be used in the specific implementation.
Refer to Fig. 2, it is exemplary, in practical application scene, if the window 21 of high-voltage switch gear 20 towards horizontal direction,
Detection light is then sent to window with the window 21 being right against on high-voltage switch gear pipeline in the horizontal direction.
Preferably, detection light can use laser, and laser has the characteristic that the angle of divergence is small, power is concentrated, propagation distance is remote, energy
Enough realize long-range detection, it helps make measurement more accurate.
S11：Receive detection light incidence to enter in the high-voltage switch gear pipeline, pass through the window after being scattered by inner-walls of duct
The light of return, and obtain the spectral information of light.
Refer to shown in Fig. 2, detection light enters in high-voltage switch gear pipeline by the way that window 21 is incident, is shone through gas in pipelines
Switch inner-walls of duct is mapped to, is scattered；Some scattered light can be propagated out by window 21 to return.Received in this method by height
The light that the window that compresses switch returns, obtain the spectral information of return light.
S12：By the spectral information of the return light of acquisition, enter with the spectral information of the reference light of acquisition after reference gas
Row contrast and analysis, obtain being detected the concentration information of gas in the high-voltage switch gear pipeline.
Produce reference light all the way simultaneously in monitoring process, reference light is used to pass through reference gas.Reference gas be comprising
Preset concentration is detected the mixed gas of gas, and the mixed gas is with having the gaseous mixture of identical component in high-voltage switch gear pipeline
Body.The concentration of wherein detected gas is known preset concentration, as reference value.If this method is applied to monitoring high-voltage switch gear
The concentration of interior hydrogen fluoride gas, then reference gas is the mixed gas for including preset concentration hydrogen fluoride gas.
Obtain reference light and pass through the spectral information after reference gas, the spectral information and reference light to return light are by reference
The spectral information obtained after gas is contrasted and analyzed, and obtains being detected the concentration information of gas in high-voltage switch gear.
As can be seen that gas on-line monitoring method in the present embodiment high-voltage switch gear, outside high-voltage switch gear, is pressed off using height
Close the window on pipeline and detection light is propagated into high-voltage switch gear, make gas in detection light-transmissive high-voltage switch gear, realize to high pressure
The on-line monitoring of gas concentration is detected in switch, compared with the conventional method, this method need not change high-voltage switch gear structure,
Field of power can be used more widely.
In a kind of preferred embodiment of the present embodiment method, wedge-shaped medium can be set at window, it is described here
Wedge-shaped medium is the optical medium with wedge structure.Persistently there are certain concussion or shake in high-tension switch gear operation
It is dynamic, it can influence to detect the stabilization of light light path, can reduce measurement accuracy, in the present embodiment method, set wedge shape to be situated between at window
Matter, detection light when pass through wedge-shaped medium due in wedge-shaped medium using up for wedge structure understand by multiple reflections, increase light path,
Help to make propagation beamstability, can effectively suppress interference noise, improve the signal to noise ratio of on-line monitoring.
Optionally, wedge-shaped medium can use prism wedge.In actual applications, with reference to shown in figure 2, window 21 may pass through
Flange is fixed, and is arranged on using a piece of thicker prism wedge 22 among window flange.
In a kind of embodiment, Fig. 3 refer to, the light used in this high-voltage switch gear in gas on-line monitoring method
System includes：First light source 100, beam splitting element 101, reference gas chamber 102, the first reflecting element 103, the second reflecting element
104th, the 3rd reflecting element 105, the first detector 106, the second detector 107 and signal processing apparatus 108；
First light source 100 is used to send laser；
The beam splitting element 101 is used to the light that sends first light source 100 and separated a branch of as reference light and to join
Examine light guiding and be incident to the reference gas chamber 102, separate another Shu Zuowei detection light and detection light guiding is incident to described the
One reflecting element 103, the reference gas chamber 102 are interior filled with the mixed gas that gas is detected comprising preset concentration；
First detector 106 is used to receive the light being emitted by the reference gas chamber 102 and is converted to electric signal；
First reflecting element 103 is used to detection light guiding inciding injectron road；
Second reflecting element 104 is used for reception detection light incidence and enters high-voltage switch gear, returned after internal gas
Light, and light is converged into the 3rd reflecting element 105；
3rd reflecting element 105 is used to light reflexing to second detector 107, by second detector
107 are received and converted to electric signal；
The signal processing apparatus 108 is respectively connected with first detector 106 and second detector 107, is used
Handled, contrasted and analyzed in detectable signal and reference signal, obtain the concentration information of detected gas.
In this optical system, the first light source 100 can use the wavelength and the adjustable tunable laser of line width of output laser,
This sample device exports the wavelength and line width of laser by changing, and every kind of wavelength corresponds to specific gas absorption spectrum line, can be with
The gas componant different applied to detection.Preferably, the first light source 100 can use semiconductor laser with tunable, and tunable half
Conductor laser has the advantages of narrow linewidth, and spectral width (being less than 0.1nm) is much smaller than the broadening of gas absorption spectrum line, Neng Goushi
Now to the detection of small-signal, accuracy of detection is improved.
Optionally, the first light source 100 sends infrared laser.
Optionally, in the specific implementation, can be set between the beam splitting element 101 and the reference gas chamber 102 in light path
It is equipped with the reflecting element 109 that the reference gas chamber 102 is reflected into for the reference light for sending the beam splitting element 101.Institute
It can be plane mirror to state reflecting element 109, and plane mirror, into 45 degree of settings, refers to Fig. 3 with reflecting surface and incident light
It is shown.
First reflecting element 103 can be the reflecting element of all kinds and shape, all fall in the scope of protection of the present invention.Can
Choosing, the first reflecting element 103 can use the prism with reflecting surface, or can also use plane mirror.
It may be provided with and be used for the beam splitting element between the beam splitting element 101 and first reflecting element 103
The 4th reflecting element 110 of first reflecting element 103 is incided in the 101 detection light guiding sent.4th reflecting element 110
It can be the reflecting element of all kinds and shape, for example can be the prism with reflecting surface, or can also use plane anti-
Mirror is penetrated, is all fallen in the scope of protection of the present invention.Exemplary, the first reflecting element 103 can use right angle of the right-angle surface for reflecting surface
Prism, it is engaged, the 4th reflecting element 110 can use 45 degree right-angle prisms of the inclined-plane as reflecting surface, and beam splitting element 101 is sent out
The detection light gone out is irradiated to the 4th reflective, element 110 with 45 degree of incidence angles, the reflecting surface of the first reflecting element 103 and the 4th anti-
The reflecting surface of optical element 110 is parallel.
Second reflecting element 104 receives the light returned and light is converged into the 3rd reflecting element 105.The present embodiment optical system
In system, second reflecting element 104, which is provided with, to be used to lead to by the hole of light, the light reflected by the 3rd reflecting element 105
Cross the hole and incide the second detector 107., can be by the 3rd reflecting element 105 and second reflective yuan using this light path design
Part 104 arranges that the second detector 107 is located at the rear of the second reflecting element 104, can make each optical element characteristics of compact layout in opposite directions.It is excellent
Choosing, it can design and restrain in the hole on the second reflecting element 104 towards described one end of second detector 107, play converged light
Effect, the light for helping will transmit through converge to the second detector.
Preferably, in the centrally disposed hole being used for by light of second reflecting element 104, the 3rd reflecting element
105th, the center line of second reflecting element 104 and second detector 107 overlaps, and makes light path arrangement compact.Described
Two detectors 107, second reflecting element 104 and the 3rd reflecting element 105 are located at first reflecting element 103 and carried on the back
To detection light exit direction side.
Wherein, the reflecting surface of the second reflecting element 104 is concave surface, and light is converged into the 3rd reflecting element 105.3rd is reflective
Element 105 can use plane reflecting element.
In this optical system, filled with the mixed gas that gas is detected comprising preset concentration in reference gas chamber 102.
The reference signal that first detector 106 obtains, which includes, reference light the spectral information after reference gas, and second visits
Survey the detectable signal that device 107 obtains and include spectral information of the detection light after gas in high-voltage switch gear, signal processing apparatus 108
Reference signal and detectable signal are handled, contrasted and analyzed, obtains being detected the concentration information of gas in high-voltage switch gear.
Fig. 4 is refer to, in another embodiment, is used in this high-voltage switch gear in gas on-line monitoring method
Optical system includes, the first light source 200, beam splitting element 201, reference gas chamber 202, the first reflecting element 203, the second reflecting element
204th, the 3rd reflecting element 205, the first detector 206, the second detector 207, secondary light source 208 and signal processing apparatus 209；
First light source 200 is used to send laser；
The beam splitting element 201 is used to the light that sends first light source 200 and separated a branch of as reference light and to join
Examine light guiding and be incident to the reference gas chamber 202, separate another Shu Zuowei detection light and detection light guiding is incident to described the
One reflecting element 203, the reference gas chamber 202 are interior filled with the mixed gas that gas is detected comprising preset concentration；
First detector 206 is used to receive the light being emitted by the reference gas chamber 202 and is converted to electric signal；
The secondary light source 208 is used to send visible ray, and will be seen that light incides first reflecting element 203；
First reflecting element 203 is used to detection light, visible ray guiding are incided into injectron road respectively；
Second reflecting element 204 is used for reception detection light, visible ray incidence respectively and enters high-voltage switch gear, by inside
The light returned after gas, and light is converged into the 3rd reflecting element 205；
3rd reflecting element 205 is used to light reflexing to second detector 207, by second detector
207 are received and converted to electric signal；
The signal processing apparatus 209 is respectively connected with first detector 206 and second detector 207, is used
Handled, contrasted and analyzed in detectable signal and reference signal, obtain the concentration information of detected gas.
In this optical system, the first reflecting element will detect light guiding and propagate out, while will be seen that light guiding outgoing, it is seen that
Light has identical propagation path with detection light, using visible ray as instruction light path, for indicating the position of detection target.In reality
In application process, staff can adjust each optical element according to visible ray light path, make detection light-seeking to high-voltage switch gear window.
The embodiment of first light source 200 refers to embodiment description.
In this optical system, in the specific implementation, can between the beam splitting element 201 and the reference gas chamber 202 light
It is provided with road and is reflected into the reference gas chamber, 202 reflecting element for the reference light for sending the beam splitting element 201
210.The reflecting element 210 can be plane mirror, and plane mirror, into 45 degree of settings, can be joined with reflecting surface and incident light
Examine shown in Fig. 4.
First reflecting element 203 can be the reflecting element of all kinds and shape, all fall in the scope of protection of the present invention.Can
Choosing, the first reflecting element 203 can use the prism with reflecting surface, or can also use plane mirror.
In a kind of embodiment, refer to Fig. 4, first reflecting element 203 be with the first right-angle surface and
The prism of second right-angle surface, and first right-angle surface and second right-angle surface form same right angle, first right-angle surface
It is reflecting surface with second right-angle surface；Detection light, the secondary light source 208 being emitted by the beam splitting element 201 are sent
Visible ray incide the first right-angle surface and the second right-angle surface of first reflecting element 203 respectively, be reflected, make respectively
The detection light of outgoing is parallel with visible optical propagation direction.
The spy for the beam splitting element 201 to be sent can be set between the reflecting element 203 of beam splitting element 201 and first
Light-metering guides the 4th reflecting element 211 for inciding first reflecting element 203.4th reflecting element 211 can be various
The reflecting element of type and shape, for example can be the prism with reflecting surface, or plane mirror can be also used, at this
In invention protection domain.
And/or it is provided with and is used for described second between the secondary light source 208 and first reflecting element 203
The visible ray that light source 208 is sent incides the 5th reflecting element 212 of first reflecting element 203.5th reflecting element 212
It can be the reflecting element of all kinds and shape, for example can be the prism with reflecting surface, or can also use plane anti-
Mirror is penetrated, is all fallen in the scope of protection of the present invention.
Optionally, in above-mentioned embodiment, it is provided between the reflecting element 203 of beam splitting element 201 and first
4th reflecting element 211, the 5th reflecting element is provided between the secondary light source 208 and first reflecting element 203
212, the 4th reflecting element 211 uses 45 degree right-angle prisms of the inclined-plane for reflecting surface, and the one of its inclined-plane and the first reflecting element 203
Right-angle surface is parallel；5th reflecting element 212 uses 45 degree right-angle prisms of the inclined-plane for reflecting surface, its inclined-plane and the second reflecting element
203 another right-angle surface is parallel,.4th reflecting element 211, the first reflecting element 203, the 5th reflecting element 212 are symmetrical arranged,
Make each optical element arrangement in the present apparatus well-balanced.
Second reflecting element 204 receives the light returned, and light is converged into the 3rd reflecting element 205.In this optical system,
Second reflecting element 204 is provided with the hole being used for by light, and the light reflected by the 3rd reflecting element 205 passes through described
Incide the second detector 207 in hole., can be by the 3rd reflecting element 205 and the phase of the second reflecting element 204 using this light path design
To arrangement, the second detector 207 is located at the rear of the second reflecting element 204, can make each optical element characteristics of compact layout.Preferably, may be used
Hole on the second reflecting element 204 is designed towards the convergence of the one end of the second detector 207, plays a part of converged light, contribute to by
The light of transmission converges to the second detector.
Preferably, in the centrally disposed hole being used for by light of second reflecting element 204, the 3rd reflecting element
205th, the center line of second reflecting element 204 and second detector 207 overlaps, second detector 207, described
Second reflecting element 204 and the 3rd reflecting element 205 are located at first reflecting element 203 backwards to detection light exit direction
Side.Make light path arrangement compact.
Wherein, the reflecting surface of the second reflecting element 204 is concave surface, and light is converged into the 3rd reflecting element 205.3rd is reflective
Element 205 can use plane reflecting element.
The reference signal that first detector 206 obtains, which includes, reference light the spectral information after reference gas, and second visits
Survey the detectable signal that device 207 obtains and include spectral information of the detection light after gas in high-voltage switch gear, signal processing apparatus 209
Reference signal and detectable signal are handled, contrasted and analyzed, obtains being detected the concentration information of gas in high-voltage switch gear.
Specifically, signal processing apparatus 209 carries out preposition enhanced processing to detectable signal and reference signal, and pass through A/D
After conversion, the processing of second harmonic is carried out, finally by contrasting and analyzing spectral information, obtains the concentration letter of detected gas
Breath.
Further, the signal processing apparatus 209 is additionally operable to spectral information that display analyzes to obtain to detectable signal, to ginseng
Examine the concentration information of spectral information that signal analysis obtains and detected gas.
Gas on-line monitoring method in high-voltage switch gear provided by the invention, can be outside high-voltage switch gear in high-voltage switch gear
Gas is monitored.In addition, the optical system used uses open light path design, using laser as detection light, can be achieved
Remote detection, optical system is set to avoid electromagnetic interference influence away from high-tension switch gear.
Gas on-line monitoring method in a kind of high-voltage switch gear provided by the present invention is described in detail above.Herein
In apply specific case to the present invention principle and embodiment be set forth, the explanation of above example is only intended to help
Assistant solves the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not
On the premise of departing from the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification is also fallen into
In the protection domain of the claims in the present invention.
Claims (10)
- A kind of 1. gas on-line monitoring method in high-voltage switch gear, it is characterised in that including：Detection light is sent to the window with the window being right against on high-voltage switch gear pipeline, the window is for realizing the height Compress switch the window of preset function itself；Receive detection light incidence to enter in the high-voltage switch gear pipeline, returned after being scattered by inner-walls of duct by the window Light, and obtain the spectral information of light；By the spectral information of the return light of acquisition, with the spectral information of the reference light of acquisition after reference gas carry out contrast and Analysis, obtain being detected the concentration information of gas in the high-voltage switch gear pipeline.
- 2. gas on-line monitoring method in high-voltage switch gear according to claim 1, it is characterised in that the window is setting Overhauls window on the high-voltage switch gear pipeline.
- 3. gas on-line monitoring method in high-voltage switch gear according to claim 1, it is characterised in that set at the window Put wedge-shaped medium.
- 4. gas on-line monitoring method in the high-voltage switch gear according to claim any one of 1-3, it is characterised in that use Optical system include the first light source, beam splitting element, reference gas chamber, the first reflecting element, the second reflecting element, the 3rd reflective yuan Part, the first detector, the second detector and signal processing apparatus；First light source is used to send laser；The beam splitting element is used to the light that sends first light source and separated a branch of be inducted into as reference light and by reference light The reference gas chamber is incident upon, another Shu Zuowei detection light is separated and detection light guiding is incident to first reflecting element, institute State in reference gas chamber filled with the mixed gas that gas is detected comprising preset concentration；First detector is used to receive the light being emitted by the reference gas chamber and is converted to electric signal；First reflecting element is used to detection light guiding inciding injectron road；Second reflecting element is used to receive the incident light for entering high-voltage switch gear, returning after internal gas of detection light, and Light is converged into the 3rd reflecting element；3rd reflecting element is used to light reflexing to second detector, is received and converted to by second detector Electric signal；The signal processing apparatus is respectively connected with first detector and second detector, for detectable signal and Reference signal is handled, contrasted and analyzed, and obtains the concentration information of detected gas.
- 5. gas on-line monitoring method in high-voltage switch gear according to claim 4, it is characterised in that also include being used to send The secondary light source of visible ray；The visible ray that the secondary light source is sent incides first reflecting element, and first reflecting element will be seen that light draws Importing is mapped to high-voltage switch gear pipeline, and second reflecting element receives visible ray incidence and enters high-voltage switch gear, by internal gas The light returned afterwards, and light is converged into the 3rd reflecting element.
- 6. gas on-line monitoring method in high-voltage switch gear according to claim 5, it is characterised in that described first reflective yuan Part is the prism with the first right-angle surface and the second right-angle surface, and first right-angle surface and second right-angle surface composition are same Right angle, first right-angle surface and second right-angle surface are reflecting surface；It is reflective that the visible ray that detection light, the secondary light source being emitted by the beam splitting element are sent incides described first respectively The first right-angle surface and the second right-angle surface of element.
- 7. gas on-line monitoring method in high-voltage switch gear according to claim 5, it is characterised in that in the beam splitting element The detection light for the beam splitting element to be sent is provided between first reflecting element, and to incide described first reflective 4th reflecting element of element；And/or it is provided between the secondary light source and first reflecting element for the secondary light source to be sent Visible ray incides the 5th reflecting element of first reflecting element.
- 8. gas on-line monitoring method in the high-voltage switch gear according to claim any one of 4-7, it is characterised in that described Two reflecting elements, which are provided with, to be used for by the hole of light, is incided by the light of the 3rd reflecting element reflection by the hole described Second detector.
- 9. gas on-line monitoring method in high-voltage switch gear according to claim 8, it is characterised in that reflective described second The centrally disposed hole being used for by light of element, the 3rd reflecting element, second reflecting element and second detection The center line of device overlaps.
- 10. gas on-line monitoring method in high-voltage switch gear according to claim 4, it is characterised in that first light source To export the wavelength and the adjustable tunable laser of line width of laser.
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| CN110161038A (en) * | 2019-05-05 | 2019-08-23 | 长春理工大学 | A kind of test method for monitoring the damage from laser moment on-line |
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