CN104330170A - Optical fiber radiation thermometer based on colorimetric method - Google Patents
Optical fiber radiation thermometer based on colorimetric method Download PDFInfo
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- CN104330170A CN104330170A CN201410561766.7A CN201410561766A CN104330170A CN 104330170 A CN104330170 A CN 104330170A CN 201410561766 A CN201410561766 A CN 201410561766A CN 104330170 A CN104330170 A CN 104330170A
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Abstract
The invention discloses an optical fiber radiation thermometer based on a colorimetric method, and belongs to the field of high temperature measurement. The thermometer comprises an optical system and a circuit system, wherein lenses of a lens group are connected with a high-power Y-type power transmission optical fiber to form the optical system; the circuit system adopts signal dual-channel processing and comprises photoelectric detectors, a preprocessing module, a preamplifier, an AD sampling module, a signal processing module, a display module, a keyboard input module and an information interaction module. Signals are divided into two paths via the power transmission optical fiber and transmitted to the corresponding photoelectric detectors, optical signals are converted into current signals, the current signals are converted into voltage signals via the preprocessing module and the pre-amplification module, the signal processing module adopts a curve fitting algorithm for analysis, sampling signals are obtained, a corresponding temperature value is calculated through calibration, and difference setting is further improved through the interaction module. The optical fiber radiation thermometer structure based on the colorimetric method can be applied to measurement of a crystal furnace thermal field.
Description
Technical field
The present invention relates to crystal oven thermal field surveying instrument, relate to a kind of optical fiber radiation temperature measurer based on colourimetry measuring crystal oven thermal field particularly.
Background technology
The method of contact type measurement, particularly thermopair are the traditional measurement methods of field of pyrometry.But it exists resistance to corrosion difference, and the life-span is short, consume large, price is high, and upper temperature limit is many 1800 DEG C of such as the following shortcomings.
The Radiation Temperature Measurement Instrument of utilization non-contact method is another common method of field of pyrometry.Radiation Temperature Measurement Instrument relies on the energy of non-cpntact measurement infrared emanation to calculate corresponding temperature, measures the upper limit not by the restriction of temperature-sensing element heatproof degree, does not thus limit in principle the highest observable temperature, be applicable to the measurement of more than 1800 DEG C temperature ranges.Traditional Radiation Temperature Measurement Instrument is based on the philosophy of blackbody radiation, record the emittance of specific band and the corresponding relation of relevant temperature, and the emissivity of respective material is revised, thus extrapolate corresponding temperature, but it is easily subject to external environment condition interference, affects degree of accuracy.Color comparison temperature measurement is to the optimization in a kind of method of radiation temperature measurement, determines temperature to target object by the ratio of certain two wavelength place radiance.The impact of factor on measurement accuracy that steam, flue dust, distance etc. make attenuation can be reduced.
The 56 series of IR temperature measurers of Germany DASI, the system accuracy in the scope of 500 DEG C to 3300 DEG C reaches 0.5% measured value, and repeatable accuracy is 0.1%, and temperature resolution is 0.1 DEG C.But the optical lens of these appliance requires precisions and the light signal processing device of complexity, be thus difficult to make compact conformation, cheap surveying instrument.
Most Radiation Temperature Measurement Instrument is as a kind of technology based on photoelectric precision thermometric, and the photodetector adopted is the key element in precise temperature measurement technology.The photovalve of very early time mostly is photomultiplier and photoelectric tube, requires the high pressure of a few hectovolt to several kilovolts in the application of this kind of electron tube, and spectral response all at visible ray near infrared range.Afterwards, the photodetector that some were lightweight, volume is little occurs successively.And all improve a lot in stability, sensitivity, spectral response range, passband width etc. and improve, and very soon in engineer applied, occupy irreplaceable position.On market, the photodetector of Multiple Type, standard packaging is for raising surveying instrument compactedness, raising degree of accuracy are provided convenience further.
Nowadays most Radiation Temperature Measurement Instrument adopts straight barrel type structure, is not easy to observe.The powerful Y type energy-transmission optic fibre past seldom adopts owing to not easily making, and along with the progress of technology, can obtain now the good high-power Y type energy-transmission optic fibre of effect along separate routes.If Y type can be passed can with photodetector connected applications, this for improving precision, simplify temperature measurer complexity and providing convenience.
Summary of the invention
The object of this invention is to provide a kind of optical fiber radiation temperature measurer based on colourimetry, this instrument is a kind of surveying instrument that can detect superhigh temperature.
The technical scheme that the present invention adopts for its technical matters of solution is:
Based on the optical fiber radiation temperature measurer of colourimetry, comprise optical system and Circuits System, it is characterized in that: described optical system connects high-power Y type energy-transmission optic fibre by lens of lens group and forms; Described Circuits System adopts signal two-way measuring, comprise photodetector, pretreatment module, prime amplifier, AD sampling module, signal processing module, display module, input through keyboard module and information interaction module, wherein, described photodetector, pretreatment module, prime amplifier, AD sampling module are connected successively with signal processing module, and described display module, key-press input, information interaction module are connected with described signal processing module respectively; The output terminal of described Y type energy-transmission optic fibre is connected respectively to the input end of two different photodetectors.
Described two different photodetectors are InGaAs photodiode and the Si photodiode of standard FC/PC encapsulation.
Described pretreatment module adopts logarithmic amplifier.
Described Y type energy-transmission optic fibre is installed in the protection armour be made up of flange-connection stainless steel metal flexible pipe.
Further, described information interaction module adopts USB interface or electric current loop pattern.
Optical fiber radiation temperature measurer structure based on colourimetry of the present invention is applicable to the measurement of crystal oven thermal field very much, there is following beneficial effect: (1) uses lens of lens group, can ensure that light-inletting quantity is suitable within the specific limits, adopt standard interface can directly plug, repeated and interchangeability is good; (2) high-power Y type energy-transmission optic fibre is adopted; core diameter 600 μm of energy transfer losses are low; rear end two-way branch deviation is little, and compared to ordinary optic fibre coupling mechanism, high-power Y type energy-transmission optic fibre can transmit luminous energy that camera lens obtains better; improve accuracy of instrument; use metal armour to protect in Y type energy-transmission optic fibre outside, made it anti-and suppressed stretch-proof function, there is flexibility; improve the problem that ordinary optic fibre is easy to break, can better varying environment be adapted to.(3) compared to common Radiation Temperature Measurement Instrument, optical fiber itself has anti-electromagnetic interference capability, adopts y-type optical fiber, makes main body circuit to a certain degree reduce interference away from body of heater high temperature source, ensure that the stability worked online for a long time by the connection of optical fiber; (4) adopt the photodiode of the standard FC/PC encapsulation of two kinds of different models as photodetector, choosing of different-waveband is realized by being combined with y-type optical fiber, decrease the use of filter plate, make entirety compacter, miniaturization, realize colourimetry thermometric, decrease the impact of extraneous factor compared to traditional Radiation Temperature Measurement Instrument; (5) pretreatment module adopts logarithmic amplifier, and its precision is high, simultaneously to carry out than operation input signal; (6) Circuits System circuit height is integrated can be arranged on above crystal oven control desk easily, and USB interface etc. are mutual is simultaneously arranged, and further facilitates operator and implements to observe, Data Digital process etc.
Accompanying drawing explanation
Fig. 1 is the system chart of the optical fiber radiation temperature measurer that the present invention is based on colourimetry;
Fig. 2 is the structural drawing of the optical fiber radiation temperature measurer that the present invention is based on colourimetry, 1-lens of lens group, 2-high-power Y type energy-transmission optic fibre, 3-Circuits System.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details.
As Fig. 1, in apparatus of the present invention, optical system is made up of lens of lens group 1 and energy-transmission optic fibre 2, wherein lens of lens group 1 point diameter is 25mm, field angle 28 ° × 40 °, coupled wavelength scope 350nm ~ 2000nm, to be fibre core the be silica fibre of 600 μm that Y type energy-transmission optic fibre 2 adopts, two-way branch deviation is less than 5%; Circuits System 3 is made up of photodetector, pretreatment module, pre-amplifying module, AD sampling module, signal processing module, display module, input through keyboard module and information interaction module.Optical system and Circuits System separate, whole Circuits System can be placed in electronic cartridge, and thermometric site environment can be avoided preferably to disturb during equipment circuit part thermometric, away from high temperature source, improves system serviceable life.Photodetector adopts InGaAs and Si two kinds of photodiodes of standard FC/PC encapsulation, reaches choosing of two wave bands in conjunction with front end y-type optical fiber.Signal two-way measuring, enters Circuits System, avoids mutual interference.Pretreatment module adopts logarithmic amplifier to process feeble signal, the small and weak current signal of pA rank can be sensed, be converted to voltage signal, carry out realizing the requirement of colourimetry ultimate principle than process to input signal, precision can be improved preferably because logarithmic amplifier sensitivity is very high.Preconditioned voltage is adjusted to corresponding A/D sampling by prime amplifier can span.What AD sampling module adopted is 24 high-precision sampling A/D chip, the simulating signal obtained of can accurately sampling at work.Interactive module adopts USB and electric current loop can send information to computer in real time; Fig. 2 is structural representation of the present invention.
Composition graphs 1 and Fig. 2 illustrate implementation method during actual measurement.First lens of lens group is installed on the viewport of crystal oven by simple rack, open the switch on viewport, heat radiation energy in stove converges in Y type energy-transmission optic fibre front end surface, through the energy beam that y-type optical fiber is divided into two-way close with regard to scioptics arrangement of mirrors head; Y type energy-transmission optic fibre tail end is connected with photodetector, the photodetector of two kinds of unlike signals, the luminous energy arriving 1700nm two different-wavebands to 400 to 1100nm and 900 respectively produces phase induced current, Y type energy-transmission optic fibre is installed in the protection armour be made up of flange-connection stainless steel metal flexible pipe, the flexible and impact of the peripheral electromagnetic environment that do not fracture, further reduces simultaneously; Current signal is that two-way measuring carries out than computing through pretreatment module, I/V conversion simultaneously; After pre-service, signal has prime amplifier to regulate amplification further, makes it be suitable for AD sampling; Signal after adjustment is sampled accurately by AD sampling module; After AD sampling, digital data transmission enters signal processing module, and message processing module carries out analyzing and processing by adopting piecewise fitting to input signal, calculates corresponding temperature value; Relevant temperature value is exported by display module; Corresponding data value can use the modes such as USB/ electric current loop be transferred on computer by synchronous signal processing module by information interaction module, read, convenient monitoring by corresponding software, facilitates the correction of parameter and perfect simultaneously; In different measuring situation, the parameter used can be carried out selection and suitably be revised by key-press module, facilitate the accurate measurement of adaptation situation in signal processing module.
Claims (5)
1. based on the optical fiber radiation temperature measurer of colourimetry, comprise optical system and Circuits System, it is characterized in that: described optical system connects high-power Y type energy-transmission optic fibre by lens of lens group and forms; Described Circuits System adopts signal two-way measuring, comprise photodetector, pretreatment module, prime amplifier, AD sampling module, signal processing module, display module, input through keyboard module and information interaction module, wherein, described photodetector, pretreatment module, prime amplifier, AD sampling module are connected successively with signal processing module, and described display module, key-press input, information interaction module are connected with described signal processing module respectively; The output terminal of described Y type energy-transmission optic fibre is connected respectively to the input end of two different photodetectors.
2. the optical fiber radiation temperature measurer based on colourimetry according to claim 1, is characterized in that, described two different photodetectors are InGaAs photodiode and the Si photodiode of standard FC/PC encapsulation.
3. the optical fiber radiation temperature measurer based on colourimetry according to claim 1, is characterized in that, described pretreatment module adopts logarithmic amplifier.
4. the optical fiber radiation temperature measurer based on colourimetry according to claim 1, is characterized in that, described Y type energy-transmission optic fibre is installed in the protection armour be made up of flange-connection stainless steel metal flexible pipe.
5. according to the optical fiber radiation temperature measurer based on colourimetry one of Claims 1-4 Suo Shu, it is characterized in that, described information interaction module adopts USB interface or electric current loop pattern.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105136311A (en) * | 2015-09-10 | 2015-12-09 | 马鞍山市安工大工业技术研究院有限公司 | Blast furnace hot-blast stove vault infrared optical fiber temperature detection system and method |
| CN106908167A (en) * | 2017-01-19 | 2017-06-30 | 同济大学 | A kind of method of material-to-be-heated temperature in guide-lighting measurement microwave oven |
| CN107702802A (en) * | 2017-11-27 | 2018-02-16 | 安徽维新能源技术有限公司 | A kind of device for detecting electric machine controller MOSFET temperature |
| CN108981822A (en) * | 2018-08-28 | 2018-12-11 | 清华大学 | A kind of reflected light removing method of temperature deformation synchro measure |
| CN109855742A (en) * | 2019-04-03 | 2019-06-07 | 哈尔滨理工大学 | A kind of color comparison temperature measurement instrument based on radiation temperature measurement theory |
| CN109932062A (en) * | 2019-04-24 | 2019-06-25 | 马鞍山市江海节能科技有限公司 | Scan-type optical fibre infrared temperature measurement instrument and temp measuring system |
| 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 |
| CN110686796A (en) * | 2019-10-24 | 2020-01-14 | 北京航空航天大学 | Infrared radiation type sapphire optical fiber high-temperature sensor and temperature measurement system |
| CN111637979A (en) * | 2020-06-17 | 2020-09-08 | 上海巨哥电子科技有限公司 | Multicolor temperature measurement-based device and method and storage medium |
| CN112254836A (en) * | 2020-09-23 | 2021-01-22 | 菲兹克光电(长春)有限公司 | Optical fiber ultra-high temperature thermometer based on colorimetric method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136311A (en) * | 2015-09-10 | 2015-12-09 | 马鞍山市安工大工业技术研究院有限公司 | Blast furnace hot-blast stove vault infrared optical fiber temperature detection system and method |
| CN105136311B (en) * | 2015-09-10 | 2018-06-26 | 马鞍山市安工大工业技术研究院有限公司 | A kind of blast funnace hot blast stove vault infrared optical fiber temperature checking method |
| CN106908167A (en) * | 2017-01-19 | 2017-06-30 | 同济大学 | A kind of method of material-to-be-heated temperature in guide-lighting measurement microwave oven |
| CN107702802A (en) * | 2017-11-27 | 2018-02-16 | 安徽维新能源技术有限公司 | A kind of device for detecting electric machine controller MOSFET temperature |
| CN108981822A (en) * | 2018-08-28 | 2018-12-11 | 清华大学 | A kind of reflected light removing method of temperature deformation synchro measure |
| CN109855742A (en) * | 2019-04-03 | 2019-06-07 | 哈尔滨理工大学 | A kind of color comparison temperature measurement instrument based on radiation temperature measurement theory |
| CN109932062A (en) * | 2019-04-24 | 2019-06-25 | 马鞍山市江海节能科技有限公司 | Scan-type optical fibre infrared temperature measurement instrument and temp measuring system |
| 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 |
| CN110686796A (en) * | 2019-10-24 | 2020-01-14 | 北京航空航天大学 | Infrared radiation type sapphire optical fiber high-temperature sensor and temperature measurement system |
| CN111637979A (en) * | 2020-06-17 | 2020-09-08 | 上海巨哥电子科技有限公司 | Multicolor temperature measurement-based device and method and storage medium |
| CN111637979B (en) * | 2020-06-17 | 2022-02-15 | 上海巨哥电子科技有限公司 | Multicolor temperature measurement-based device and method and storage medium |
| CN112254836A (en) * | 2020-09-23 | 2021-01-22 | 菲兹克光电(长春)有限公司 | Optical fiber ultra-high temperature thermometer based on colorimetric method |
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Application publication date: 20150204 |