CN102288296A - Wide-angle infrared lens for electrical equipment heating diagnosis - Google Patents
Wide-angle infrared lens for electrical equipment heating diagnosis Download PDFInfo
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- CN102288296A CN102288296A CN2011101400027A CN201110140002A CN102288296A CN 102288296 A CN102288296 A CN 102288296A CN 2011101400027 A CN2011101400027 A CN 2011101400027A CN 201110140002 A CN201110140002 A CN 201110140002A CN 102288296 A CN102288296 A CN 102288296A
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- infrared lens
- infrared
- angle infrared
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 title claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 22
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 8
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 abstract description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 22
- 239000002184 metal Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000005459 micromachining Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- PFNQVRZLDWYSCW-UHFFFAOYSA-N (fluoren-9-ylideneamino) n-naphthalen-1-ylcarbamate Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1=NOC(=O)NC1=CC=CC2=CC=CC=C12 PFNQVRZLDWYSCW-UHFFFAOYSA-N 0.000 description 1
- 241000931526 Acer campestre Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 244000227633 Ocotea pretiosa Species 0.000 description 1
- 235000004263 Ocotea pretiosa Nutrition 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention relates to a wide-angle infrared lens for electrical equipment heating diagnosis, belonging to the infrared lens, which is matched with an infrared imager to be used and is used for sealed electrical equipment heating diagnosis. A plurality of tooth grooves are arranged along a concentric circle on one side surface of a retro-focus Fresnel lens made of linear low density polyethylene (LLDPE) resin, the distance between adjacent tooth grooves is gradually reduced in the diameter direction from the circle center of the lens 1 to the circumference, and in addition, the depths of all tooth grooves are identical. The wide-angle infrared lens has the advantages that the physiochemical performance is stable, the manufacture cost is low, and in addition, the imaging quality is high.
Description
Technical field
The present invention relates to Infrared Lens,, be used for the wide-angle Infrared Lens and the single face mounting structure thereof of airtight power equipment device heating diagnosis particularly with the supporting effect of infrared thermoviewer.
Background technology
The electric pressure of sealing switch equipment mostly is 35kV and following middle low-voltage, thereby working current is big, internal part generates heat with contact resistance is excessive because of aging as positions such as: contact and bus row junctions, as untimely discovery and eliminating hot stall hidden danger, cause fire and large tracts of land, long-time power outage thus easily.
Temperature measuring devices such as infrared thermoviewer have obtained the application of extensive maturation in the heating diagnosis of power equipment, because its detection to the trouble spot is noncontact and charged, to the diagnosis of the hot stall hidden danger of power equipment have efficient height, accuracy of judgement, image directly perceived, safe and reliable, be not subjected to electromagnetic interference (EMI), characteristics such as detection range is far away and detection speed is fast, make the initial failure diagnosis and the preventative maintenance of power equipment become simple and convenient.But the equipment that this application only limits to open wide, to the sealing switch equipment of a large amount of operations since the obstruct of its shell need Infrared Lens be installed on shell and could use the diagnosis of generating heat such as infrared thermography.Detect and monitor that by Infrared Lens working temperature, especially contact, the bus row of totally enclosed high-tension switch gear inside connect etc. locates, find in advance and get rid of hot stall hidden danger, extremely important and necessary to the safe and reliable operation of electric system.At present, the saturating infrared multi-thread material that is usually used in Infrared Lens processes with inorganic crystal materials such as monocrystalline silicon, monocrystalline germanium, zinc selenide, zinc sulphide.The common feature of this class material is that price is expensive, and size is little, bad mechanical property, physical and chemical stability are poor.
The Infrared Lens that processes with inorganic crystal material has following performance deficiency:
1, price is expensive, and diameter is that 60 millimeters circular eyeglass unit price is often wanted thousands of units, and size has slightly and increases greatly more, and price rises greatly;
2, size is little, has limited observation scope, covers entire equipment in order to make infrared observation, and a plurality of lens often are installed on an equipment.If increase lens sizes for enlarging observation scope, but the size of inorganic crystal material Infrared Lens generally is no more than 100 millimeters of diameters, big again, then be difficult to process successfully;
3, bad mechanical property, mineral crystal infra-red material lens are frangible, can not anyly be squeezed, stretch, the effect of crooked and vibrations, have slightly not noted just damagedly, stay the cavity to device housings, cause potential safety hazard;
4, skin hardness is very low, easily the mill flower.If lens surface has filth or dust, can only with muslin be stained with anhydrous alcohol gently sassafras wipe away;
5, poor stability, facile hydrolysis, the not corrosion of acid and alkali-resistance can not long-term work under the environment that pollution and high humidity are arranged.
These technical matterss have had a strong impact on infrared detection technology applying on sealing switch equipment, become the obstacle of such equipment heating state-detection and repair based on condition of component.
Summary of the invention
It is stable to the purpose of this invention is to provide a kind of physicochemical property, the power equipment device heating diagnosis wide-angle Infrared Lens that image quality is high.
The object of the present invention is achieved like this: a kind of power equipment heating diagnosis wide-angle Infrared Lens, comprise negative focal length FRESNEL lens, material is that upper edge, the side concentric circles of the described lens of LLDPE resin is provided with some teeth groove, from the lens center of circle on the diametric(al) of circumference, distance between the adjacent sheaves is dwindled gradually, and the degree of depth of all teeth groove is identical.
The tooth that forms the cross section between the above-mentioned adjacent sheaves and be oxygon is prominent.
The said lens diameter is 30mm, and thickness is 0.38mm, and focal length is-330mm.
The degree of depth of above-mentioned teeth groove is 50m.
Another object of the present invention provides the single face mounting structure of said lens.
Another object of the present invention is achieved in that a kind of single face mounting structure of wide-angle Infrared Lens, lens are fixed on the window frame of metal through fluid sealant, window frame of metal is installed on the circular window that the high-tension switch gear shell offers through self-plugging rivet, and enclosing cover is screwed on the window frame of metal.
Compared with prior art, the invention has the beneficial effects as follows:
1, infrared optics resin material and the Infrared Lens that is processed into the wide-angle characteristic structure have the advantage that physicochemical property is stable, price is lower and image quality is high.Infrared optics resin material physical and chemical performance is stable, can overcome the above-mentioned defective of inorganic crystal material.At the infrared optics aspect of performance, higher long-wave infrared transmitance is not only arranged, and its refractive index is approximately 1.5, its reflection loss is 10% under the situation of plated film not having, and does not need need reduce reflection loss with the anti-reflection film of costliness as inorganic crystal material in the surface plating as single crystal silicon material.Earlier the infrared optics resin material being hot pressed into is that thickness is 0.38 millimeter film, and the two sides is the plane.Adopted excimer laser micromachining system to be processed into negative focal length FRESNEL lens again, the working ability of excimer laser micromachining system can make lens processing be undertaken by optimum optical plan, and lens adopt complete non-ball surface, and do not adopt conical teeth groove; Adopting aperiodic teeth groove structure, is that concentric circles is provided with the adjacent sheaves spacing and increases and rims of the lens is arranged to the center at some teeth groove promptly, and the teeth groove number reduces, and does not adopt the structure that has fixing teeth groove number in unit length radially and; Simultaneously keep the degree of depth of all teeth groove constant again.These measures have reduced uncertain scattering and diffraction, have reduced the optics of lens error, have improved the lens imaging quality and to the transmitance of particular range of wavelengths light.By taking into account under the prerequisite of image quality, the negative focal length according to the size and the sensing range of sealing switch equipment are determined corrected lens has enlarged the visual angle.Cooperate picture frame to be installed on sealing switch equipment shell appropriate location, in its narrow space, can make range of observation enlarge 2 to 4 times.
The physical-chemical parameters such as the table 1 of LLDPE resin material.
The physical-chemical parameters of table 1:LLDPE resin material
2, the design of single face mounting structure makes operating personnel need not enter sealing switch equipment and operating personnel's hand or instrument and need not stretch into sealing switch equipment, just can finish installment work, and the degree of protection of lens can reach IP65 on this single face mounting structure, (degree of protection that is higher than sealing switch equipment), satisfy the security requirement of sealing switch equipment, meet the requirement of DL/T664-2008 " the charging equipment infrared diagnosis technology is used guide rule " fully.
The present invention is to sealing switch equipment, detects and monitor the working temperature of heating positions such as contact, busbar junction, and the hidden danger of finding in advance and fix a breakdown has very important significance to the safe and reliable operation of electric system.
Description of drawings
Fig. 1 is the transmitance synoptic diagram of LLDPE resin material.
Fig. 2-the 1st, the outboard profile of lens single face mounting structure.
Fig. 2-the 2nd, the left hand view of lens shown in Fig. 2-1.
Fig. 2-the 3rd, the left hand view after enclosing cover covers shown in Fig. 2-2.
Fig. 3 is the groove shape figure of FRESNEL lens.
Fig. 4 is the scanning electron micrograph of FRESNEL lens.
Fig. 5 is the 3D shape figure (middle body) of FRESNEL lens.
Fig. 6 is the groove shape scale error analysis chart of FRESNEL lens.
Embodiment
Fig. 1 is the transmitance of LLDPE resin material, and thickness of sample is 0.38mm, and ordinate is represented transmitance, and unit is %, and horizontal ordinate is represented Infrared wavelength, and unit is 10
4/ λ.
To different switchgears, the size difference of Infrared Lens.
Fig. 3 illustrates, and the degree of depth of lens teeth groove is certain, about 50 μ m, and the teeth groove pattern does not have most advanced and sophisticated sphering.
Fig. 5 is that the 3D shape figure (middle body) of FRESNEL lens and the instrument of Fig. 6 employing are the high precision non-contact three-dimensional pattern determinator MITAKA NH-3SP that Japanese Mitaka Kohki Co., Ltd. produces, this device adopts semiconductor laser detector (wavelength 635nm) to come the scanning lens surface, avoided contacting the contact error that instrument causes by conventional probe, its Measurement Resolution is 1nm, and spot size of laser beams is approximately 1 μ m.Three-dimensional appearance detects image and shows that lens FRESNEL structure is neat, the degree of depth unanimity of all teeth groove, and the teeth groove pattern does not have most advanced and sophisticated sphering and fractures or break, and the middle body of lens and epitaxial part all are like this.
Fig. 6 (transverse axis: radial dimension, mm; The longitudinal axis: scale error, μ m) in, error shown in the groove shape scale error analysis chart of FRESNEL lens is for measuring the poor of physical dimension and design outline size, the most about 0.5 μ m.Causing reasons of error in the processing is at random microvibration.
Fig. 3 illustrates, and material is that upper edge, the side concentric circles of the negative focal length FRESNEL lens 1 of LLDPE resin is provided with some teeth groove, and on the diametric(al) of circumference, the distance between the adjacent sheaves is dwindled gradually from the lens center of circle, and the degree of depth of all teeth groove is identical.
Said lens 1 diameter is 30mm, and thickness is 0.38mm, and focal length is-330mm.The degree of depth of above-mentioned teeth groove is 50m.The tooth that forms the cross section between the above-mentioned adjacent sheaves and be oxygon is prominent.
The processing of FRESNEL lens:
Because selected organic film material sees through the infrared ray of 8-12 μ m, it is the CO2 laser processing device of 10.6 μ m that the ditch mortise processing of FRESNEL lens can not be selected wavelength for use; And high-molecular organic material has moderate or high absorption to excimer laser, we have adopted excimer laser micromachining system, short wavelength's pulse laser of this system employs ultraviolet band, the macromolecular material internal electron is excited, cause the ionization of moment and the decomposition of material, reach the effect of teeth groove processing.Process equipment may be selected to be the processing of light shield projection, pattern on the light shield can be dwindled 4 to 10 times projects on the workpiece and processes, also MicroMaster in the utilisation system and ProMaster laser direct writing system directly are machined in the CAD figure on the workpiece, are exactly a little machining tool of laser numerical control.Process equipment title: excimer laser micromachining system; Manufacturer: Belgian OPTEC company;
Specification is as follows:
Optical maser wavelength: 248 nm; The maximum impulse energy: 700 mJ, energy density 0.5-5l/cm2 is adjustable, average power: 65 W laser repetition rate 0-300Hz are adjustable; Processing mobile platform X-Y axle stroke: 200 mm * 200 mm, Z axle stroke: 5 mm; Projection system of processing-light shield: 4 ", light beam covers the light shield area: 10mm * 10mm, projection optics lens ratio: 4 times to 10 times.
The FRESNEL lens that are installed on the fixed ac metal closing switch gear of XGN2-12 molding box type have following parameter: diameter: Φ 40mm, FRESNEL lens diameter: Φ 30mm material: LLDPE resin, thickness: 0.38mm, focal length :-330mm increases the visual angle: 15 degree.Infrared Lens is installed on the appropriate location of provision for sealing shell with single face installation method, cooperates with infrared thermography and can realize sealing switch equipment large tracts of land, large-scale infrared heating on-line monitoring easily and safely, for repair based on condition of component provides strong foundation.
The single face mounting structure of wide-angle Infrared Lens is as follows: lens 1 are fixed on the window frame of metal 5 through fluid sealant, and window frame of metal is installed on the circular window that high-tension switch gear shell 2 offers through self-plugging rivet 3, and enclosing cover 4 is screwed on the window frame of metal.
The wide-angle Infrared Lens is installed on the window frame of metal, be fixed together with the fluid sealant sealing and with window frame of metal, porose on the window frame of metal, hole on the sealing switch equipment panel according to position shown in the paper drill jig during installation, window frame of metal is anchored on the sealing switch equipment panel with manually loose core riveting gun and the high-strength stainless steel blind rivet of loosing core.The metal enclosing cover is connected with window frame of metal by screw thread, and the degree of protection of Infrared Lens reaches IP65, is higher than the degree of protection of sealing switch equipment.So the security that window can not change sealing switch equipment is installed.
The sealing switch equipment inner space is narrow, and operating personnel and instrument often can not arrive at the sealing switch equipment back side of panel when Infrared Lens was installed.The single face installation method is only installed in the sealing switch equipment panel front and is got final product, and personnel need not enter outside sealing switch equipment, also stretches into the sealing switch equipment the inside without hand or instrument, just can finish installation.Installation method is as follows:
(1) erecting tools: self-adhesive paper drill jig, hammer, chisel, electric drill, 4.2mm bore flower, hole making drill, round file, the manual riveting gun of loosing core;
(2) installation method:
A) the self-adhesive paper drill jig at first is affixed on it installation place for pressing the paper matrix that the Infrared Lens size is printed in advance;
B) with chisel mark center pit and position of mounting hole;
C) with electric drill 4.2mm is installed and bores flower drill centers and 3 mounting holes;
D) open circular hole with hole making drill in position shown in the center pit;
E) smear otch with round file polishing otch burr, and with rust protection paint;
F) loose core the fastening Infrared Lens of blind rivet in panel with manually loose core riveting gun and high-strength stainless steel;
G) install, can use.
Claims (4)
1. a power equipment heating is diagnosed and is used the wide-angle Infrared Lens, comprise, negative focal length FRESNEL lens (1), it is characterized in that: described material is that upper edge, the side concentric circles of the described lens (1) of LLDPE resin is provided with some teeth groove, from lens (1) center of circle on the diametric(al) of circumference, distance between the adjacent sheaves is dwindled gradually, and the degree of depth of all teeth groove is identical.
2. the wide-angle Infrared Lens is used in power equipment heating diagnosis according to claim 1, and it is characterized in that: described lens (1) diameter is 30mm, and thickness is 0.38mm, and focal length is-330mm.
3. the wide-angle Infrared Lens is used in power equipment heating diagnosis according to claim 1 and 2, and it is characterized in that: the degree of depth of described teeth groove is 50 m.
4. the wide-angle Infrared Lens use in power equipment according to claim 3 heating diagnosis, it is characterized in that: the tooth that forms the cross section between the described adjacent sheaves and be oxygon is dashed forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101400027A CN102288296A (en) | 2011-05-27 | 2011-05-27 | Wide-angle infrared lens for electrical equipment heating diagnosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101400027A CN102288296A (en) | 2011-05-27 | 2011-05-27 | Wide-angle infrared lens for electrical equipment heating diagnosis |
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| Publication Number | Publication Date |
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| CN102288296A true CN102288296A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101400027A Pending CN102288296A (en) | 2011-05-27 | 2011-05-27 | Wide-angle infrared lens for electrical equipment heating diagnosis |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2100639U (en) * | 1991-09-06 | 1992-04-01 | 中国科学院上海技术物理研究所 | Bowl-shaped confocal infrared cmpound lens |
| JPH0679081B2 (en) * | 1984-11-20 | 1994-10-05 | 松下電器産業株式会社 | Infrared Fresnel lens |
| CN101387737A (en) * | 2007-09-10 | 2009-03-18 | 住友电气工业株式会社 | Far-infrared camera lens, lens unit, and imaging apparatus |
| CN202188909U (en) * | 2011-05-27 | 2012-04-11 | 四川电力职业技术学院 | Wide-angle infrared lens for power equipment heating diagnosis |
-
2011
- 2011-05-27 CN CN2011101400027A patent/CN102288296A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679081B2 (en) * | 1984-11-20 | 1994-10-05 | 松下電器産業株式会社 | Infrared Fresnel lens |
| CN2100639U (en) * | 1991-09-06 | 1992-04-01 | 中国科学院上海技术物理研究所 | Bowl-shaped confocal infrared cmpound lens |
| CN101387737A (en) * | 2007-09-10 | 2009-03-18 | 住友电气工业株式会社 | Far-infrared camera lens, lens unit, and imaging apparatus |
| CN202188909U (en) * | 2011-05-27 | 2012-04-11 | 四川电力职业技术学院 | Wide-angle infrared lens for power equipment heating diagnosis |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121224 |
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Effective date of registration: 20121224 Address after: Tsing Hua Road Qingyang District of Chengdu City, Sichuan Province, No. 8 610072 Applicant after: Sichuan Electric Vocational and Technical College Applicant after: State Grid Corporation of China Address before: Tsing Hua Road Qingyang District of Chengdu City, Sichuan Province, No. 8 610072 Applicant before: Sichuan Electric Vocational and Technical College |
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Application publication date: 20111221 |