CN102359823B - Pen type free field light sensation temperature sensor - Google Patents
Pen type free field light sensation temperature sensor Download PDFInfo
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- CN102359823B CN102359823B CN201110175460A CN201110175460A CN102359823B CN 102359823 B CN102359823 B CN 102359823B CN 201110175460 A CN201110175460 A CN 201110175460A CN 201110175460 A CN201110175460 A CN 201110175460A CN 102359823 B CN102359823 B CN 102359823B
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Abstract
The invention relates to a pen type free field light sensation temperature sensor, belonging to the signal detection technology field. The sensor comprises an optical path protective case body, an optical device, a cavity short fiber and an external fiber interface. By utilizing a point frequency filtering characteristic of a narrowband filter plate, a miniature total reflection prism, a plane convex lens and a filter plate are integrated in a stainless steel shell with a window at a side surface. Leading flow covers of the shell are in alignment with a detonation center and are distributed in a detonation field according to a certain rule. When cloud detonation happens, substances around the sensor are subjected to reaction and emit strong light. Through the window at the side surface and an internal optical path, the sensor introduces a signal into a subsequent photoelectric signal conversion and acquisition apparatus, and the signal is recorded to complete measurement of light temperature. The sensor has a simple structure and a small volume. Through a plurality of sensors distributed in the cloud detonation field, information of field center temperature and temperature gradient distribution can be obtained, and the sensor is suitable for a severe environment with strong impact and strong shock.
Description
Technical field
The present invention relates to a kind of pen type free field light sensation temperature sensor, belong to the signal detection technique field.
Background technology
Along with development of modern industry, the industrial explosion accident happens occasionally.1989 M&MPC (Marsh&Mclennan Protection Conclusion) statistic analysis result of 150 industrial disaster accidents is shown that the industrial explosion disaster accounts for 60% of total industrial disaster, be one of topmost industrial disaster.In all types of industries explosion accident, quite a few is arranged is owing to the blast that is suspended in airborne inflammable substance causes.As in the process of mining, gas, coal dust and air mixed and reach finite concentration after, meet unexpected energy such as the spark accident of can blasting; In oil and the Chemical Manufacture, inflammable gas that leaks out or droplet are dispersed in when reaching finite concentration in the air, and burning or blast also can take place (electric spark, naked light) under suitable energy.
Above-mentioned blast is generally cloud and mist detonation, and it is a kind of very important form of injuring that the temperature of cloud and mist detonation field is injured.Yet owing to receive the restriction of means of testing, the research that existing detonation temperature field heat is injured also rests on the qualitative analysis that the dependence experience is carried out.In recent years; Non-contact optical thermometric theoretical developments is very fast, many new temperature sensing meanses occurred, yet these methods are on the one hand because its optical system more complicated and cooperation are accurate; Sharp pounding can make optical system get muddled in the detonation field, can't test; On the other hand, the optical device shock resistance is poor, and some optical device is frangible.Therefore these exact instrument can only be surveyed the quick-fried district of whole cloud outside away from cloud and mist detonation place, and what test out is the medial temperature in cloud and mist detonation zone, and can't obtain the distribution of detonation central temperature and thermograde thereof.Though adopt infrared detecting method can show its thermograde substantially, many owing to opaque material in the cloud and mist detonation and flue dust, have a strong impact on its measuring accuracy.
Summary of the invention
The present invention satisfies the needs of temperature distributing measuring in central temperature measurement of cloud and mist detonation field and the detonation field in order to overcome the defective of prior art, has proposed a kind of pen type free field light sensation temperature sensor.
The present invention realizes through following technical scheme.
A kind of pen type free field light sensation temperature sensor of the present invention is made up of short fiber and external optical fiber interface in light path protection housing, optical devices, the chamber;
Light path protection housing is the kuppe of the hollow structure of stainless steel; Head is a pyramidal structure; Main part is a maximum gauge less than 3 centimetres column construction, and the cross-section structure of main part outer face is similar to the shape of playground runway: wherein corresponding outer face, both sides is a circular arc, and two sections outer faces that connect circular arc outer face, both sides are the plane; Have the light path receive window on the outer face, one section plane therein; Design both can reduce the influence of housing stream field like this, helped the uplifting window in the outer face, plane again, laid optical device;
Short fiber and external optical fiber interface all are embedded in the main part of light path protection housing in optical devices, the chamber; Optical devices comprise total reflection prism, planar convex lens and narrow band filter slice; Wherein total reflection prism is embedded in housing body and partly goes up the position corresponding with the light path receive window, and externally optical fiber interface is embedded in the afterbody of housing body part;
Total reflection prism receives the blast light beam in the detonation field through the light path receive window; And reflex to planar convex lens, and planar convex lens focuses of the light beam into narrow band filter slice, and narrow band filter slice has a frequency filter function; Its centre wavelength scope is ± 2nm is to ± 10nm; The half-band width deviation is ± 2nm, gathers the light signal of required wavelength, through short fiber in the sensor cavity light signal delivered to the sensor external unit through external optical fiber interface at last.
A kind of pen type free field light sensation temperature sensor of the present invention; Its principle is: utilize narrow band filter slice point filtering characteristic frequently; Small-sized total reflection prism, planar convex lens and filter plate are integrated in the Stainless Steel Shell; Side is windowed, and the kuppe of housing is aimed at the detonation center, and according to certain regular distribution in the detonation field; When cloud and mist detonation takes place; Material around the sensor reacts and sends strong light, and sensor is introduced follow-up photosignal conversion and harvester through side window and inner light path with signal, and it is noted; So that analysis is afterwards resolved, thus the measurement of completion light temperature.
Beneficial effect
The present invention does not need complicated objective system, and simple in structure, volume is little, through a plurality of sensors that are distributed in the cloud and mist explosive field, can access an interior central temperature with and the situation of temperature gradient distribution, be applicable to the rugged surroundings of thump, strong motion.
Description of drawings
Fig. 1 is a side view of the present invention;
Fig. 2 is the front elevation of light path containment vessel phosphor bodies part of the present invention outer face;
Fig. 3 is an inner structure principle schematic of the present invention;
Fig. 4 is a sensor layout synoptic diagram at the scene in the embodiments of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
A kind of pen type free field light sensation temperature sensor; The front elevation of its side view and light path containment vessel phosphor bodies part outer face thereof is as depicted in figs. 1 and 2; Its inner structure is as shown in Figure 3, is made up of short fiber and external optical fiber interface in light path protection housing, optical devices, the chamber;
Light path protection housing is the kuppe of the hollow structure of stainless steel; Head is a pyramidal structure; Main part is a maximum gauge less than 3 centimetres column construction, and the cross-section structure of main part outer face is similar to the shape of playground runway: wherein corresponding outer face, both sides is a circular arc, and two sections outer faces that connect circular arc outer face, both sides are the plane; Have the light path receive window on the outer face, one section plane therein; Design both can reduce the influence of housing stream field like this, helped the uplifting window in the outer face, plane again, laid optical device;
Short fiber and external optical fiber interface all are embedded in the main part of light path protection housing in optical devices, the chamber; Optical devices comprise total reflection prism, planar convex lens and narrow band filter slice; Wherein total reflection prism is embedded in housing body and partly goes up the position corresponding with the light path receive window, and externally optical fiber interface is embedded in the afterbody of housing body part.
Embodiment
A kind of pen type free field light sensation temperature sensor is used for the quiet quick-fried test of fuel-air explosive, and fuel-air explosive is 5kg altogether, and the cloud and mist scope of shedding reaches 4m, and concrete experimental procedure is:
Step 1, the long optical fibers that sensor is outside buries in advance, and long optical fibers one end is connected on the acquisition channel of multichannel collecting appearance, and the other end is connected with the external optical fiber interface of light sensation temperature sensor;
Step 2, in the testing ground, arrange 3 groups of light sensation sensors, arrangement is as shown in Figure 4, is arranged in the position of " 1# ", " 2# " and " 3# "; According to two-color thermometry, the optical filter frequency is respectively 600nm and 900nm in every group of 2 sensors, sensor; Wherein two sensors of " 1# ", " 2# " and " 3# " are respectively 2m, 3m and 4m from the distance of cloud and mist field central point;
Step 3, fixed support are installed in sensor on the support, and sensor head is aimed at fuel-air explosive, and this moment, test macro was built completion;
Behind step 4, the secondary initiation, read the magnitude of voltage of each passage, and utilize the color comparison temperature measurement algorithm to calculate this temperature value from Acquisition Instrument.Test macro gets into SBR once more, prepares test next time.
The above is preferred embodiment of the present invention, and the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.Everyly do not break away from the equivalence of accomplishing under the disclosed spirit of the present invention or revise, all fall into the scope of the present invention's protection.
Claims (3)
1. a pen type free field light sensation temperature sensor is characterized in that: be made up of short fiber and external optical fiber interface in light path protection housing, optical devices, the chamber;
Light path protection housing is the kuppe of the hollow structure of stainless steel, and head is a pyramidal structure, and main part is a maximum gauge less than 3 centimetres column construction; The corresponding outer face, both sides of main part is a circular arc, and two sections outer faces that connect circular arc outer face, both sides are the plane, have the light path receive window on the outer face, one section plane therein;
Short fiber and external optical fiber interface all are embedded in the main part of light path protection housing in optical devices, the chamber; Optical devices comprise total reflection prism, planar convex lens and narrow band filter slice; Wherein total reflection prism is embedded in housing body and partly goes up the position corresponding with the light path receive window, and externally optical fiber interface is embedded in the afterbody of housing body part;
Total reflection prism receives the blast light beam in the detonation field through the light path receive window; And with beam reflection to planar convex lens; Planar convex lens focuses of the light beam into narrow band filter slice; Narrow band filter slice is gathered the light signal of required wavelength, through short fiber in the sensor cavity light signal is delivered to the sensor external unit through external optical fiber interface at last.
2. a kind of pen type free field light sensation temperature sensor according to claim 1 is characterized in that: said narrow band filter slice is to have a narrow band filter slice of frequency filter function.
3. a kind of pen type free field light sensation temperature sensor according to claim 1 and 2 is characterized in that: the centre wavelength scope of said narrow band filter slice for ± 2nm to ± 10nm, the half-band width deviation is ± 2nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110175460A CN102359823B (en) | 2011-06-27 | 2011-06-27 | Pen type free field light sensation temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110175460A CN102359823B (en) | 2011-06-27 | 2011-06-27 | Pen type free field light sensation temperature sensor |
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| Publication Number | Publication Date |
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| CN102359823A CN102359823A (en) | 2012-02-22 |
| CN102359823B true CN102359823B (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110175460A Expired - Fee Related CN102359823B (en) | 2011-06-27 | 2011-06-27 | Pen type free field light sensation temperature sensor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1444020A (en) * | 2003-04-20 | 2003-09-24 | 深圳清华大学研究院 | Scanning non-contacting infrared body temperature quick detection method and instrument |
| CN1584525A (en) * | 2004-06-16 | 2005-02-23 | 东南大学 | Composite structure of fibre optical Bragg grating temperature sensor and producing method thereof |
| US6865194B1 (en) * | 1998-12-04 | 2005-03-08 | Cidra Corporation | Strain-isolated Bragg grating temperature sensor |
| CN2763785Y (en) * | 2004-05-21 | 2006-03-08 | 上海紫珊光电技术有限公司 | Package structure for optic fibre and grating temperature sensor |
| CN202101763U (en) * | 2011-06-27 | 2012-01-04 | 北京理工大学 | Pen type free filed light sensation temperature sensor |
-
2011
- 2011-06-27 CN CN201110175460A patent/CN102359823B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6865194B1 (en) * | 1998-12-04 | 2005-03-08 | Cidra Corporation | Strain-isolated Bragg grating temperature sensor |
| CN1444020A (en) * | 2003-04-20 | 2003-09-24 | 深圳清华大学研究院 | Scanning non-contacting infrared body temperature quick detection method and instrument |
| CN2763785Y (en) * | 2004-05-21 | 2006-03-08 | 上海紫珊光电技术有限公司 | Package structure for optic fibre and grating temperature sensor |
| CN1584525A (en) * | 2004-06-16 | 2005-02-23 | 东南大学 | Composite structure of fibre optical Bragg grating temperature sensor and producing method thereof |
| CN202101763U (en) * | 2011-06-27 | 2012-01-04 | 北京理工大学 | Pen type free filed light sensation temperature sensor |
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