CN106225951A - Sapphire fiber blackbody chamber pyrostat and temp measuring method thereof - Google Patents
Sapphire fiber blackbody chamber pyrostat and temp measuring method thereof Download PDFInfo
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- CN106225951A CN106225951A CN201610788641.7A CN201610788641A CN106225951A CN 106225951 A CN106225951 A CN 106225951A CN 201610788641 A CN201610788641 A CN 201610788641A CN 106225951 A CN106225951 A CN 106225951A
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- blackbody chamber
- sapphire fiber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- Radiation Pyrometers (AREA)
Abstract
The invention discloses a kind of sapphire fiber blackbody chamber pyrostat and temp measuring method thereof, it is adaptable to field of pyrometry.Sensor includes sapphire fiber blackbody chamber sensing head, energy-transmission optic fibre, photodetector, pre-amplifying module, AD sampling module, signal processing module, display module.Sapphire fiber blackbody chamber has the radiation characteristic close to ideal black-body, the heat radiation energy in temperature field can be delivered on photodetector be converted into the signal of telecommunication by energy-transmission optic fibre, the signal of telecommunication is gathered by AD sampling module, the digital signal of signal processing module analytical calculation sampling, draws the functional relationship between corresponding temperature and the signal of telecommunication finally by data matching with demarcation thus realizes the measurement of temperature.The sapphire fiber blackbody chamber pyrostat system structure of the present invention is simple, easy to use.
Description
Technical field
The invention belongs to optical fiber sensing field, relate to a kind of sapphire fiber black matrix that can be used for continuous measuring high-temperature
Cavity sensor, is specifically related to sensor radiation temp measuring method.
Background technology
Radiation Temperature Measurement Instrument calculates corresponding temperature by the thermal-radiating energy of non-cpntact measurement, therefore in industry and science
The fields such as research achieve and are widely applied.The advantages such as it is high that it has temperature measurement accuracy, reproducible, obtain general in high temperature measurement
And application.The MS/MI series of IR temperature measurer that such as Germany's match is risen, the system accuracy in the range of 1500 DEG C to 2500 DEG C reaches
To 0.5% measured value, repeatable accuracy is 0.1% thermometric value+1K, and temperature resolution is 0.1 DEG C.Though contactless infrared measurement of temperature
So can there is the higher thermometric upper limit, but when it is measured, must be known by the emissivity situation of thermal source, easily be disturbed by background radiation, survey
Obtain is only the temperature of heat source surface.Thermocouple sensor, by contact testee, measures the temperature of testee.Contact
High Temperature Measurement Technique mainly uses the noble-metal thermocouple such as platinum, rhodium to measure, and has higher sensitivity and certainty of measurement.But
Being that pyrometer couple is typically made by precious metal material, in hot environment, thermocouple exists again that resistance to corrosion is poor, the longevity
Order the drawbacks such as short, loss is serious.And severe corrosive, strong electromagnetic environment in, it is difficult to normally work.
Summary of the invention
It is an object of the invention to provide sapphire fiber blackbody chamber pyrostat system, this sensor is that one can be examined
Survey the measuring instrument of superhigh temperature.Fibre-optic black-body cavity sensor utilizes sapphire fiber high temperature resistant and infrared light transmission characteristic, with thermal source
Contact, can directly measure the change of thermal field.Use quartz multimode fibre will to transmit to away from heat with the radiant flux of blackbody chamber
At source, then coordinate photoelectric cell and Circuits System to process display, it is to avoid high-temperature work environment and electromagnetic interference, be suitable for long-term
Stably temperature monitoring.Another object of the present invention is to provide one and utilizes this fibre-optic black-body cavity pyrostat to carry out temperature
Degree measures the method for correction.
The present invention solves that its technical problem be the technical scheme is that
A kind of sapphire fiber blackbody chamber pyrostat, including sensing head and for processing sensing head feedback signal
Circuits System, described sensing head is sapphire fiber blackbody chamber sensing head, including blackbody chamber, protection sleeve pipe, sapphire fiber,
Silica fibre, sapphire fiber and blackbody chamber are placed in protecting in sleeve pipe, after protection sleeve pipe is stretched in one end of silica fibre, logical
Crossing fibre-optical splice to be connected with one end of sapphire fiber, the other end of sapphire fiber arranges blackbody chamber, another of silica fibre
End is then connected with Circuits System.
Described blackbody chamber is formed by the molybdenum thin film that is coated with in sapphire fiber end.
One layer of oxide protective film also it is coated with outside described molybdenum thin film.
Described fibre-optical splice is to mate sleeve pipe with sapphire fiber, silica fibre match respectively.
Described protection sleeve pipe is alundum tube.
Described Circuits System is analog circuit, adopts including integrated photodetector on circuit boards, preamplifier, AD
Original mold block, signal processing module, display module, wherein: described photodetector, for accepting the black of silica fibre transmission
Body cavity heat radiation energy, it is possible to this blackbody chamber heat radiation energy is converted into current signal；Described preamplifier, for putting
The current signal of big photodetector output is converted into voltage signal, and is amplified；Described AD sampling module, for by preposition
The voltage signal of amplifier output is converted to digital signal；Described signal processing module, for processing the output of AD sampling module
Voltage digital signal, is calculated the temperature value of correspondence by fitting algorithm and is exported by display module.
Described signal processing module is relation reality based on temperature with sampling yardage:
T=a x6+b·x5+c·x4+d·x3+e·x2+f·x+g
Wherein T is temperature, and unit is DEG C, and x is sampling yardage, and a, b, c, d, e, f, g are constant.
The thermometry of the sapphire fiber blackbody chamber pyrostat described in a kind of claim 1, including following
Step: first blackbody chamber heat radiation energy is transferred on photodetector by silica fibre, now blackbody chamber infrared radiant energy
Amount can be converted into current signal by photodetector；Current signal through the conversion of pre-amplifying module and amplification,
To analog voltage signal；Analog voltage signal is converted into digital voltage signal by AD sampling module, passes through through signal processing module
Fitting algorithm, i.e. can be calculated the temperature value of correspondence, and be exported by display module.
The method have the advantages that
(1) use sapphire fiber one end make blackbody chamber and dock silica fibre method make sapphire fiber black
Body cavity sensing head, can directly plug, repeatability and interchangeability the best；Blackbody chamber and sapphire fiber are outer added with corundum protection
Sleeve pipe；
(2) energy-transmission optic fibre used be fibre core be the special silica fibre of 600 μm, energy transfer losses is extremely low.Outside optical fiber
There is layer of metal armour in flesh side face, makes the inside fibre core be protected, and has to resist and suppresses stretch-proof function.Utilize optical fiber to transmit energy can
To reduce installing and the difficulty of protection of temperature measurer, and temperature measurer is made to have flexibility and miniaturization；
(3) photodetector of the present invention uses the InGaAs photodiode of standard FC/PC encapsulation with energy-transmission optic fibre even
Connecing very convenient, the use of optical fiber can not be affected by electromagnetic interference, and makes photodetector away from high temp objects, it is ensured that
The stability worked online for a long time；
(4) whole system simple in construction, easily operated, easy to carry.Measurement scope is 800-2200 DEG C, and certainty of measurement is
± 0.2%, resolution is 1 DEG C, and response speed is less than 1ms.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of analog circuit in inventive sensor system；
Fig. 2 is the structure chart of sapphire fiber blackbody chamber pyrostat system of the present invention；
Fig. 3 is the software processing flow figure in measuring method of the present invention to signal.
In figure: photodetector 1；Preamplifier 2；AD sampling module 3；Signal processing module 4；Display module 5；Black matrix
Chamber 61；Coupling sleeve pipe 62；Protection sleeve pipe 63；Sapphire fiber 64；Silica fibre 65.
Detailed description of the invention
Below in conjunction with the accompanying drawings and implementation, the present invention is described in further details.
In conjunction with Fig. 1 and Fig. 2, apparatus of the present invention include sapphire fiber blackbody chamber sensing head, Circuits System, wherein: Lan Bao
Stone fibre-optic black-body cavity sensing head mainly by be coated with blackbody chamber sapphire fiber, coupling sleeve pipe and silica fibre form；Circuit
System is analog circuit, by photodetector 1, preamplifier 2, AD sampling module 3, signal processing module 4, display module 5
Composition, all modules are integrated on one piece of circuit board, and sensing head is realized by energy-transmission optic fibre with the connection of analog circuit.This
Invent and optical signal is converted into the signal of telecommunication in real time through photodetector, introduce analog circuit and the side of radiation temperature measurement curve matching
Method processes the signal of telecommunication, finally realizes thermometric.
Sensing head is utilized to realize receiving emittance, the implementation of measurement temperature in conjunction with Fig. 1 Yu Fig. 2 explanation.First
Sensing head is inserted in thermal field, then the heat radiation energy in thermal field will promote the external emittance of blackbody chamber；Energy passes through again
Energy-transmission optic fibre is transferred on photodetector, and then emittance is converted into the current signal of correspondence by photodetector 1；Electric current
Signal carries out I/V conversion and amplification through pre-amplifying module 2, and the voltage signal obtained is carried out high-precision by AD sampling module 3
The sampling of degree ground；After analogue signal is converted into digital signal, calculate correspondence through signal processing module 4 by the algorithm of curve matching
Temperature value and exported by display module 5.
In conjunction with Fig. 3, the signal processing module handling process to signal in sensor is described.After sensor is started working,
First signal processing module 4 initializes AD sampling module 3 and display module 5, and AD sampling module 3 is in lasting sampling work afterwards
State, display module 5 exports current temperature value.When sensing head enters thermal field, if be detected that voltage signal changes, AD samples
Module 3 will obtain digital signal new sampling and pass to signal processing module 4 and calculate, and exported by display module 5
New temperature value.
Temp measuring system can apply at the scene accurately thermometric, is necessary for could correctly demonstrating measured target through demarcation
Temperature.The polynomial curve fitting method based on method of least square that the present invention uses, is measured multi-point temp and is obtained by matching
Article one, the curve of temperature trend.The method that the present invention demarcates is to use standard blackbody stove to substitute measured target, gathers different temperatures
Under voltage signal.Directly the relation of temperature Yu voltage sample yardage is carried out 6 order polynomial curve matchings, then obtain one
Temperature and the formula of sampling yardage: T=a x6+b·x5+c·x4+d·x3+e·x2+ f x+g, wherein T is temperature (DEG C), x
For sampling yardage, a, b, c, d, e, f, g are constant.The algorithm write signal processing module 4 of this formula, such sensor is just
Can normally work.
Claims (8)
1. a sapphire fiber blackbody chamber pyrostat, including sensing head and for processing the electricity of sensing head feedback signal
Road system, is characterised by: described sensing head is sapphire fiber blackbody chamber sensing head, including blackbody chamber, protection sleeve pipe, Lan Bao
Stone optical fiber, silica fibre, sapphire fiber and blackbody chamber are placed in protecting in sleeve pipe, and protection set is stretched in one end of silica fibre
Guan Hou, is connected with one end of sapphire fiber by fibre-optical splice, and the other end of sapphire fiber arranges blackbody chamber, silica fibre
The other end be then connected with Circuits System.
Sapphire fiber blackbody chamber sensing head the most according to claim 1, it is characterised in that described blackbody chamber is by indigo plant
Molybdenum thin film that gem optical fiber end is coated with and formed.
Sapphire fiber blackbody chamber sensing head the most according to claim 2, it is characterised in that outside described molybdenum thin film also
It is coated with one layer of oxide protective film.
Sapphire fiber blackbody chamber sensing head the most according to claim 1, it is characterised in that described fibre-optical splice is for dividing
Not do not mate sleeve pipe with sapphire fiber, silica fibre match.
Sapphire fiber blackbody chamber sensing head the most according to claim 1, it is characterised in that described protection sleeve pipe is corundum
Pipe.
Sapphire fiber blackbody chamber sensing head the most according to claim 1, it is characterised in that described Circuits System is simulation
Circuit, including integrated photodetector on circuit boards, preamplifier, AD sampling module, signal processing module, display mould
Block, wherein:
Described photodetector, for accepting the blackbody chamber heat radiation energy that silica fibre transmission comes, it is possible to by this blackbody chamber
Heat radiation energy is converted into current signal；
Described preamplifier, for the current signal amplifying photodetector output is converted into voltage signal, and puts
Greatly；
Described AD sampling module, for being converted to digital signal by the voltage signal that preamplifier exports；
Described signal processing module, for processing the voltage digital signal of AD sampling module output, is calculated by fitting algorithm
Corresponding temperature value is also exported by display module.
Sapphire fiber blackbody chamber sensing head the most according to claim 1, it is characterised in that described signal processing module is
Relation reality based on temperature with sampling yardage:
T=a x6+b·x5+c·x4+d·x3+e·x2+f·x+g
Wherein T is temperature, and unit is DEG C, and x is sampling yardage, and a, b, c, d, e, f, g are constant.
8. the thermometry of the sapphire fiber blackbody chamber pyrostat described in a claim 1, it is characterised in that
Comprise the following steps: first blackbody chamber heat radiation energy is transferred on photodetector by silica fibre, now blackbody chamber
Heat radiation energy can be converted into current signal by photodetector；Current signal through pre-amplifying module conversion and
Amplify, obtain analog voltage signal；Analog voltage signal is converted into digital voltage signal by AD sampling module, through signal processing mould
Block passes through fitting algorithm, i.e. can calculate the temperature value of correspondence, and be exported by display module.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106840453A (en) * | 2017-02-10 | 2017-06-13 | 武汉理工大学 | A kind of sapphire doped crystal laser high temp sensitive system and method |
| CN107748007A (en) * | 2017-11-28 | 2018-03-02 | 哈尔滨理工大学 | Intensity of illumination detector based on graphene film optical fiber microcavity |
| CN109676435A (en) * | 2019-02-15 | 2019-04-26 | 山东大学 | A kind of Milling Temperature test device, system and method |
| CN110220613A (en) * | 2019-06-24 | 2019-09-10 | 南京师范大学 | A kind of sapphire pipe blackbody chamber optical fiber temperature-measurement device |
| CN110501090A (en) * | 2019-08-12 | 2019-11-26 | 北京航空航天大学 | Based on sapphire wafer-boron nitride pellicle fiber F-P pyrostat and preparation method and temperature sensing device |
| CN110702265A (en) * | 2019-11-14 | 2020-01-17 | 南京英诺森软件科技有限公司 | Sapphire optical fiber black body temperature measuring instrument and temperature measuring method thereof |
| CN110836778A (en) * | 2019-10-14 | 2020-02-25 | 中国北方发动机研究所(天津) | Non-contact real-time measuring system for temperature in diesel engine cylinder |
| CN111337148A (en) * | 2020-03-06 | 2020-06-26 | 上海申矽凌微电子科技有限公司 | Temperature measurement display method and system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840453A (en) * | 2017-02-10 | 2017-06-13 | 武汉理工大学 | A kind of sapphire doped crystal laser high temp sensitive system and method |
| CN107748007A (en) * | 2017-11-28 | 2018-03-02 | 哈尔滨理工大学 | Intensity of illumination detector based on graphene film optical fiber microcavity |
| CN109676435A (en) * | 2019-02-15 | 2019-04-26 | 山东大学 | A kind of Milling Temperature test device, system and method |
| CN110220613A (en) * | 2019-06-24 | 2019-09-10 | 南京师范大学 | A kind of sapphire pipe blackbody chamber optical fiber temperature-measurement device |
| CN110501090A (en) * | 2019-08-12 | 2019-11-26 | 北京航空航天大学 | Based on sapphire wafer-boron nitride pellicle fiber F-P pyrostat and preparation method and temperature sensing device |
| CN110836778A (en) * | 2019-10-14 | 2020-02-25 | 中国北方发动机研究所(天津) | Non-contact real-time measuring system for temperature in diesel engine cylinder |
| CN110702265A (en) * | 2019-11-14 | 2020-01-17 | 南京英诺森软件科技有限公司 | Sapphire optical fiber black body temperature measuring instrument and temperature measuring method thereof |
| CN111337148A (en) * | 2020-03-06 | 2020-06-26 | 上海申矽凌微电子科技有限公司 | Temperature measurement display method and system |
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Application publication date: 20161214 |