CN103604497B - Ultraviolet light detection sensor - Google Patents
Ultraviolet light detection sensor Download PDFInfo
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- CN103604497B CN103604497B CN201310611761.6A CN201310611761A CN103604497B CN 103604497 B CN103604497 B CN 103604497B CN 201310611761 A CN201310611761 A CN 201310611761A CN 103604497 B CN103604497 B CN 103604497B
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Abstract
The invention relates to the field of sensors, and discloses an ultraviolet light detection sensor. The ultraviolet light detection sensor comprises a shell body, an anode, an anode lead, a cathode lead and a photoelectric cathode, wherein ultraviolet light can transmit through the shell body, the photoelectric cathode can have a photoelectric effect under irradiation of the ultraviolet light, the anode is connected with the anode lead, the shell body, the anode and the photoelectric cathode are all in spherical shapes, the anode is located in the center of the lower portion of the shell body, the photoelectric cathode is of a membrane-shaped structure and attached to the inner surface of the shell body, the diameter of the anode is larger than one third of the diameter of the shell body, an electric conduction net is arranged between the inner surface of the shell body and the photoelectric cathode, and the electric conductive net is connected with the cathode lead. The sensor can accurately detect existence of the ultraviolet light, and can be used for ultraviolet light protection, flame detection and other aspects.
Description
Technical field
The present invention relates to sensor field, especially a kind of ultraviolet light detection sensor.
Background technology
Ultraviolet is the general name of electromagnetic wave spectrum medium wavelength radiation from 10nm to 400nm.At occurring in nature, main ultraviolet line source is the sun, and sunshine is shorter than 290nm rice ultraviolet through wavelength during atmospheric envelope is absorbed by the ozonosphere in atmospheric envelope.Ultraviolet has chemical action that photographic negative can be made photosensitive, and fluorescence is strong, and daylight lamp and various fluorescent light are all with ultraviolet fluorescence excitation material luminescence.Ultraviolet can also be false proof, and ultraviolet also has physiological action, energy sterilization, sterilization, treatment skin disease and osteomalacia etc.Ultraviolet corpuscular property is comparatively strong, and various metal can be made to produce photoelectric effect.But illuminated many ultraviolets can produce harm greatly to health, as injury eyes, make skin produce erythema, even bring out cutaneum carcinoma.So, uitraviolet intensity is detected very important very important in daily life.
In industrial circle, various with fuel oil, combustion gas, coal dust be fuel heating furnace and boiler, if it is unsuccessful to light a fire, or when normal combustion, suddenly stop working because of certain reason, if now fuel shutoff not in time, just may cause flame-out after the explosion accident that causes because continuing to drop into fuel.Therefore, effectively must detect the state of flame (catch fire or stop working), provide warning message to ensure safety in production in time.The method of flame detection is a lot, as temperature detection, UV detection, infrared detection, and visible detection and ion detection etc.The ultraviolet sent due to flame during various fuel combustion is all very strong, and once fray-out of flame, ultraviolet disappears immediately.Therefore the method reliability of flame detection is carried out with detection ultraviolet high, and by visible ray with ultraredly to affect.Ultraviolet light detection sensor of the prior art its to measure ultraviolet source direction limited, can not meet needed for production, life.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind ofly can measure the wider ultraviolet ultraviolet light detection sensor of source direction.
Ultraviolet light detection sensor disclosed in this invention, comprising can through ultraviolet housing, anode, plate lead, cathode leg and raw photoelectric photocathode can be issued at Ultraviolet radiation, described anode is connected with plate lead, described housing, anode and photocathode are semisphere, described anode is positioned at lower housing portion center, described photocathode is membrane stratiform structure and fits in shell inner surface, the diameter of described anode is greater than 1/3rd of diameter of the housing, conductive mesh is provided with between described shell inner surface and photocathode, described conductive mesh is connected with cathode leg.
Preferably, described shell is filled with inert gas.
Preferably, described housing is made up of quartz glass.
Preferably, described photocathode is tellurium caesium photocathode.
Preferably, described anode hollow hemispheric.
The invention has the beneficial effects as follows: in this ultraviolet light detection sensor, the area of photocathode is large, is easily subject to extraneous Ultraviolet radiation, thus can measures the wider ultraviolet of source direction; Anode surface area is large, and distance photocathode is comparatively near, can absorb the photoelectron that photocathode produces well; The setting of conductive mesh can make that ultraviolet is affected hardly to be penetrated, and can overcome photocathode poorly conductive again and the adverse effect brought.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Mark in figure: 1 is housing, and 2 is photocathode, and 3 is anode, and 4 is conductive mesh, and 5 is plate lead, and 6 is cathode leg.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, ultraviolet light detection sensor disclosed in this invention, comprising can through ultraviolet housing 1, anode 3, plate lead 5, cathode leg 6 and raw photoelectric photocathode 2 can be issued at Ultraviolet radiation, described anode 3 is connected with plate lead 5, described housing 1, anode 3 and photocathode 2 are semisphere, described anode 3 is positioned at housing 1 lower central, described photocathode 2 is membrane stratiform structure and fits in housing 1 inside surface, the diameter of described anode 3 is greater than 1/3rd of housing 1 diameter, conductive mesh 4 is provided with between described housing 1 inside surface and photocathode 2, described conductive mesh 4 is connected with cathode leg 6.Ultraviolet light detection sensor is all sealing usually, is generally vacuum or is filled with inert gas in housing 1.Housing 1 is generally made up of transparent material, preferably selects the material that ultraviolet transmittance is high, can select the materials such as quartz glass, sapphire, magnesium fluoride, lithium fluoride; Can there is photoelectric effect thus electron emission in described photocathode 2, be generally made up of alkaline metal or alkali metal alloy under ultraviolet irradiation; And consider that the electric conductivity of many photocathodes 2 is poor, be provided with conductive mesh 4 between described housing 1 inside surface and photocathode 2, conductive mesh 4 can not cause large loss to ultraviolet and can ensure the good transmission of electric current.Housing 1 is semisphere, is easy to through the ultraviolet from surrounding, and photocathode 2 is for membrane stratiform structure and fit in housing 1 inside surface, is conducive to photocathode 2 and receives ultraviolet from surrounding, and inside utilizing emitted light electronics.Anode 3 is semisphere and is positioned at housing 1 lower central, it is consistent that the photoelectron that photocathode 2 is launched gets over distance, the diameter of anode 3 is greater than 1/3rd of housing 1 diameter, the semispherical surface of such anode 3 is long-pending larger, be conducive to receiving photoelectron, and make photoelectronic get over distance shorter, the sensitivity of ultraviolet light detection sensor can be improved.Operationally, first positive voltage is added at plate lead 5, add negative voltage at cathode leg 6, when there being Ultraviolet radiation, ultraviolet is irradiated on photocathode 2 through housing 1 and conductive mesh 4, there is photoelectric effect thus utilizing emitted light electronics in photocathode 2, photoelectron moves due to the effect anode 3 of electric field force, is absorbed by anode 3, thus generation current, simultaneously due to voltage effect, have again electronics to move to loss of electrons that photocathode 2 supplements photocathode 2.Ultraviolet intensity is higher, and the photoelectron that in the unit interval, photocathode 2 produces is more, and the electric current flowing through ultraviolet light detection sensor is larger, thus achieves UV sensor and detect ultraviolet function.
If be vacuum in housing 1, when more weak Ultraviolet radiation, the electric current flowing through UV sensor is less not easily to be detected, so, as optimal way, in described housing 1, be filled with inert gas.Photoelectron can collide with the gas atom in housing 1 to the moving process of anode 3 from photocathode 2, thus produce ionization, the electronics produced by ionization is all received by anode together with photoelectron, positive ion but counter motion is received by photocathode 2, so make the electric current flowing through ultraviolet light detection sensor larger.Can not there is chemical reaction with photocathode 2 or anode 3 in inert gas, thus improve the serviceable life of detector.
General material transmission of ultraviolet rays is all not too high, and the ultraviolet transmittance of quartz glass is very high, so as optimal way, described housing 1 is made up of quartz glass.Be conducive to ultraviolet like this penetrate housing 1 and produce photoelectric effect with photocathode 2, make ultraviolet light detection sensor have higher sensitivity.
When ultraviolet light detection sensor is used for detecting as flame combustions such as fire, the impact of available light need be got rid of, and the solar radiation that wavelength is shorter than 290nm is absorbed by atmospheric envelope, so want flame detection combustion position best detection wavelength to be shorter than the ultraviolet of 290nm, otherwise the impact of sunshine will be subject to, so as optimal way, described photocathode is tellurium caesium photocathode.Tellurium caesium photocathode material therefor is Cs
2te, there is the about 250nm of photoelectric best ultraviolet wavelength in it, available light middle-ultraviolet lamp can be avoided preferably for the impact of flame detection.
Because in ultraviolet light detection sensor, anode is comparatively large, if be solid, wastes material undoubtedly, increases unnecessary weight, so, as optimal way, described anode hollow hemispheric.So both can not affect the transmission of electric current, and alleviate the weight of ultraviolet light detection sensor, also a saving cost.
Claims (5)
1. ultraviolet light detection sensor, comprising can through ultraviolet housing (1), anode (3), plate lead (5), cathode leg (6) and raw photoelectric photocathode (2) can be issued at Ultraviolet radiation, described anode (3) is connected with plate lead (5), it is characterized in that: described housing (1), anode (3) and photocathode (2) are semisphere, described anode (3) is positioned at housing (1) lower central, described photocathode (2) is for membrane stratiform structure and fit in housing (1) inside surface, the diameter of described anode (3) is greater than 1/3rd of housing (1) diameter, conductive mesh (4) is provided with between described housing (1) inside surface and photocathode (2), described conductive mesh (4) is connected with cathode leg (6).
2. ultraviolet light detection sensor as claimed in claim 1, is characterized in that: described housing is filled with inert gas in (1).
3. ultraviolet light detection sensor as claimed in claim 1, is characterized in that: described housing (1) is made up of quartz glass.
4. ultraviolet light detection sensor as claimed in claim 1, is characterized in that: described photocathode (2) is tellurium caesium photocathode.
5. ultraviolet light detection sensor as claimed in claim 1, is characterized in that: described anode (3) hollow hemispheric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611761.6A CN103604497B (en) | 2013-11-26 | 2013-11-26 | Ultraviolet light detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310611761.6A CN103604497B (en) | 2013-11-26 | 2013-11-26 | Ultraviolet light detection sensor |
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| CN103604497A CN103604497A (en) | 2014-02-26 |
| CN103604497B true CN103604497B (en) | 2015-04-08 |
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| CN201310611761.6A Active CN103604497B (en) | 2013-11-26 | 2013-11-26 | Ultraviolet light detection sensor |
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| CN111220656B (en) * | 2020-01-21 | 2022-05-17 | 中国工程物理研究院流体物理研究所 | Device and method for detecting cathode pollution degree of X-ray diode |
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| CN201584425U (en) * | 2009-12-23 | 2010-09-15 | 成都旭光光电技术有限责任公司 | Ultraviolet photosensitive tube with full-quartz glass shell |
| CN102221404A (en) * | 2010-03-31 | 2011-10-19 | 株式会社山武 | Flame sensor |
| CN202158900U (en) * | 2011-08-02 | 2012-03-07 | 天津中电天仪科技有限公司 | Novel flame inductor |
| CN203551109U (en) * | 2013-11-26 | 2014-04-16 | 四川天微电子有限责任公司 | Ultraviolet detection sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005045463B4 (en) * | 2005-09-22 | 2007-12-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Measuring arrangement for radiation detection under vacuum conditions |
| CN2914084Y (en) * | 2006-02-17 | 2007-06-20 | 深圳市海川实业股份有限公司 | Globose sensor and multipurpose ion concentration tester adopting globose sensor |
| JP2012255729A (en) * | 2011-06-09 | 2012-12-27 | Azbil Corp | Fire sensor |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101251416A (en) * | 2008-04-10 | 2008-08-27 | 电子科技大学 | Ultraviolet flame sensor and manufacturing method thereof |
| CN201584425U (en) * | 2009-12-23 | 2010-09-15 | 成都旭光光电技术有限责任公司 | Ultraviolet photosensitive tube with full-quartz glass shell |
| CN102221404A (en) * | 2010-03-31 | 2011-10-19 | 株式会社山武 | Flame sensor |
| CN202158900U (en) * | 2011-08-02 | 2012-03-07 | 天津中电天仪科技有限公司 | Novel flame inductor |
| CN203551109U (en) * | 2013-11-26 | 2014-04-16 | 四川天微电子有限责任公司 | Ultraviolet detection sensor |
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| 用于火焰探测的紫外光敏管;陈章其;《传感技术学报》;19960331(第1期);全文 * |
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Denomination of invention: Ultraviolet light detection sensor Effective date of registration: 20160908 Granted publication date: 20150408 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: Tianwei Electronics Co,. Ltd. Registration number: 2016510000044 |
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Date of cancellation: 20200310 Granted publication date: 20150408 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: SICHUAN TIANWEI ELECTRONIC Co.,Ltd. Registration number: 2016510000044 |
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Address after: No. 233, Wulian 1st Road, Gongxing street, Shuangliu District, Chengdu, Sichuan 610000 Patentee after: Sichuan tianmicroelectronics Co., Ltd Address before: 610052 No. 12, Cheng Cheng Road, Longtan Industrial Development Zone, Longtan, Chengdu, Sichuan, Chenghua District Patentee before: SICHUAN TIANWEI ELECTRONIC Co.,Ltd. |