CN2170511Y - Burning gas spectrum real time measurer for temp. - Google Patents

Abstract

The utility model discloses a distant non-contact type burning gas spectrum real time measurer for temperature, which is composed of a beam splitting optical fiber, two groups of filter pieces, a photomultiplier tube, a cassette and a programming singlechip. Two output ends of the beam splitting optical fiber, the two groups of filter pieces and the photomultiplier tube are respectively and successively arranged in the cassette. The utility model overcomes the defect of a complicated optical structure in the prior art and reduces the loss of light energy. The resolving power of temperature measurement of the distant non-contact type burning gas spectrum real time measurer for temperature can reach the grade of a microsecond. The utility model has the advantages of small size and light weight, can be used for measuring the temperature of flame of steady state and unsteady state and for measuring the temperature of burning gas in severe environment, and makes remote sensing temperature measurement possible.

Description

Burning gas spectrum real time measurer for temp.

The utility model relates to a kind of temperature measuring equipment, particularly a kind of remote, contactless burning gases spectrum realtime temperature measurer.

At present, on the basis of Planck and Kirchhoff radiation law, set up, sodium spectral line upset spectral measurement method and the improved sodium spectral line inversion method of measuring the radiator temperature have obtained extensively and ripe utilization, but the defective that they exist is, must be by visual inspection in the former mensuration owing to its overturn point, this just makes this method can only be limited to the temperature survey of stablizing radiator, though having carried out improving, the latter make it can be used in the continuous temperature measurement of unstable combustion flame, but during deriving, its computing formula relates to the factor that needs correction always, so result's accuracy is brought influence.In theory and practice, also the someone adopts colour temperature spectral measurement method.Once on 1991 the 2nd phases " measuring technology journal ", delivered the paper that is entitled as " research that two-color thermometry is measured thorax internal combustion gas flow temperature " as Chinese scholar official Chinese chapter at this point, with closely-spaced spectrum the colour temperature measurement Research has been carried out in combustion gas in the 7.62mm rifle thorax in the literary composition, in implementation method, heat radiation to combustion gas in the thorax can he adopt optical beam path to transmit and beam split, and by filtering, receive, on register instrument, obtain the signal curve and the data of light energization after light-to-current inversion and the amplification, promptly obtain the fuel gas temperature curve of measurement point again by MICROCOMPUTER PROCESSING.Some deficiency that this method exists is; (1) owing to adopt optical beam path to transmit and beam split, just must make whole thermometric system satisfy certain light path requirement, thereby the light gathering of optical element, energy attenuation etc. are had relatively high expectations; (2) energy attenuation that must bring owing to optical beam path behind the light signal switching electrical signals, also needs precision amplifier that test signal is further amplified, thereby makes the sensitivity of entire measuring device reduce greatly; (3) in temperature survey, he thinks more approaching at the spectral radiant power of the combustion gas to be measured at wavelength 380nm and 480nm place, thereby ε is arranged _{λ 1}≈ ε _{λ 2}, make ln (ε _{λ 1})/(ε _{λ 2}Set up)=0, in the hope of obtaining enough accurate measurement result.But these two wavelength are in ultraviolet region and visible region respectively, their spectral radiant power is actually impossible approximate unanimity, especially for the hot gas that exists very abominable atmosphere in the sort of whole temperature measuring area that is accompanied by strong chemical reaction in the thorax, their spectral radiant power is not only different, and be acute variation and be difficult to determine that the actual dynamic temperature measurement result who obtains thus obviously exists great error; (4) device volume that this method adopted is big, cost is high, and only monochromator just needs 30,000 yuans, and this device has determined it can only be applicable to close-in measurement from principle, and is difficult to realize telemeasurement.

The purpose of this utility model be for provide a kind of economic, practical, the luminous energy loss is little, the high and burning gases spectrum realtime temperature measurer easy to carry of precision.

Burning gases realtime temperature measurer described in the utility model, it mainly comprises two optical filters, two photomultipliers, magazine and sequencing single-chip microcomputer, it is characterized in that one one beam splitting light transmitting fiber that advances scene 2 in addition, fibre-optic two output terminals of beam splitting, two optical filters, two photomultipliers are sequentially arranged in the magazine respectively, the logical optical wavelength difference of two optical filters, at a distance of 6～12nm, two input ends that the output terminal of photomultiplier stretches out in the magazine respectively with the sequencing single-chip microcomputer join.The utility model is a kind of temperature measuring " two spectral method " that proposes on the theoretical opinion of atomic spectrum basis, it adopts two suitable systems and logical light filter appearance apart from extremely near optical filter, filtering through fibre-optic tested flare up fire, during according to two radiation wavelength close proximity, the temperature of the burning gases to be measured of existence and their relative spectral strength signal than between funtcional relationship, utilize the actual light intensity that records recently to try to achieve the temperature of tested hot gas again.Its concrete test process is such: if flame to be measured is unstable state flame, such as explosive flame, its flame itself contains copper so, utilize light transmitting fiber just can the light that this cupric flame sends to be transmitted this moment, this light beam is filtered by two close optical filters of logical optical wavelength respectively after light transmitting fiber is divided into two, and arrives the photomultiplier of two same models then, receive by two photomultipliers respectively and be converted to electric signal, directly enter single-chip microcomputer with circuit mode.In addition, the operation program of the thermometric mathematical formulae of the practice mode with read-only memory ROM should be solidificated in the single-chip microcomputer in advance before test, microcomputer singlechip just can perform mathematical calculations automatically and obtain the temperature of tested burning gases like this.For stable state whether above method of testing, transient state whether flame combustion gas all can obtain in real time, the temperature of continuous coverage, if but do not contain copper in the tested gas, then needing to add in flame micro-mantoquita could measure, and assay method is identical with the above.

The remarkable advantage that the utility model is compared with prior art had is: (1) is on atomic spectrum theoretical foundation, " two spectral line thermometry " proposed, not only simplify the measurement formality, also eliminated the influence that the light that exists in the existing comparison spectrum thermometry increases radiance; (2) adopt the beam splitting light transmitting fiber to replace the optical element structure of complexity in the prior art, optical filtering, opto-electronic conversion, amplification with tested flame gas simultaneously all is arranged in the magazine and finishes, reduced the luminous energy loss, improved the photometry sensitivity of system greatly, made the thermometric temporal resolution can reach the microsecond level; (3) this device has been owing to adopted through the accurate atomic spectrum two-wire method thermometric of calibration, and no longer is double-end measurement, thus can be used for the temperature measuring of some special flame hot gas, as with serious pollution steelworks, cement mill etc.; (4) the package unit cost is low, only needs 3,000 yuans, little ten times of volume ratio existing apparatus, and quality has only 1 kilogram, and is easy to carry, simple to operate; (5) because the employing light transmitting fiber carries out the transmission of light, thereby can make remote remote sensing thermometric become possibility, can adapt to the temperature survey of the burning gases of most evil bad ambiance simultaneously.

Concrete structure of the present utility model is provided by the following drawings and embodiment.

Fig. 1 is the structural representation according to burning gases spectrum realtime temperature measurer described in the utility model.

Fig. 2 is the structural representation at light transmitting fiber incidence window place in the burning gases spectrum realtime temperature measurer.

Be that example describes in further detail the utility model with flash of light flame combustion gas in the φ 7.62mm caliber rifle thorax with reference to the accompanying drawings below.

Referring to Fig. 1, mainly form according to the burning gases spectrum realtime temperature measurer that the utility model is made by beam splitting light transmitting fiber 1, optical filter (4,5), photomultiplier (6,7), magazine 8, microcomputer singlechip 9, because flame gas to be measured is a high temperature and high pressure gas, so the place also has a sensor window 10 at the fibre-optic incidence window of beam splitting, referring to Fig. 2, it mainly is made up of jewel 11 and metal bracket 12, and jewel 11 is high temperature resistant, the trapezoidal diamantine (AL that light transmission is good ₂O ₃); metal bracket 12 is cylindrical; the external belt screw thread; the centre is a bucket shape; diamantine places the bucket portion of metal bracket 12; the incident end of light transmitting fiber 1 inserts from the bottom of metal bracket 12; be close to the diamantine bottom; sensor window 10 can play high pressure sealing and protection optical fiber makes it exempt from the effect that burned gas burns; the beam splitting light transmitting fiber is the quartzy light optical fiber that pass of many stamens of into scene 2; optical filter (4; 5) logical optical wavelength is usually fixed according to contained unit in the burning gases to be measured; cupric in the present embodiment flame; then the logical optical wavelength of two optical filters is respectively 512 nanometers and 522 nanometers; half width is 12 nanometers; two photomultipliers are R306 type (or R300 type; the IP28 type) multiplier tube; two output terminals of light transmitting fiber 1; two optical filters (4; 5) and two photomultipliers (6; 7) be arranged in the magazine 8 successively respectively; and note making two output end faces of light transmitting fiber 1 point to two optical filters (4 respectively; 5) minute surface; its port and optical filter are at a distance of 3～5 millimeters; two photomultipliers (6; 7) photocathode is relative with the printing opacity side of corresponding optical filter respectively; and the distance between them is at 5～10 millimeters, photomultiplier (6; 7) output terminal respectively directly and single-chip microcomputer 9 join.During test, as long as sensor window 10 is screwed in the test window of 7.62mm caliber rifle 13.In addition, be the system of non high temperature high pressure for burning gases to be measured, can cancel sensor window 10, directly by light transmitting fiber 1 transmission.Other structure and method of testing are same as described above.

Claims (2)

1, a kind of remote, contactless burning gases spectroscopic temperature measurement device, it comprises optical filter (4,5), photomultiplier (6,7), magazine (8) and sequencing single-chip microcomputer (9), it is characterized in that one one beam splitting light transmitting fiber (1) that advances scene 2 in addition, two output terminals (2 of beam splitting light transmitting fiber (1), 3), optical filter (4,5), photomultiplier (6,7) be sequentially arranged in respectively in the magazine (8), optical filter (4,5) logical optical wavelength difference, at a distance of 6～12nm, photomultiplier (6,7) two input ends that output terminal stretches out in the magazine (8) respectively with sequencing single-chip microcomputer (9) join.

2, burning gases spectrum realtime temperature measurer according to claim 1 is characterized in that also being provided with a sensor window (10) at the incidence window place of beam splitting light transmitting fiber (1), and it mainly is made up of jewel (11) and metal bracket (12).

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