CN1719211A - Real time measuring method of heat proof material ablation temperature field and its special measuring device - Google Patents
Real time measuring method of heat proof material ablation temperature field and its special measuring device Download PDFInfo
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- CN1719211A CN1719211A CN200510010199.7A CN200510010199A CN1719211A CN 1719211 A CN1719211 A CN 1719211A CN 200510010199 A CN200510010199 A CN 200510010199A CN 1719211 A CN1719211 A CN 1719211A
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Abstract
The present invention provides a heat-resiting material ultra-high-temperature ablative temperature field real-time measuring method and its special-purpose equipment. Said equipment includes the components of tungsten-rhenium thermocouple, signal collecting device, signal conversion device and computer, etc. and its measuring method includes the steps of drilling measuring hole on surface of tested sample, filling boron-nitride-silicone resin mixture in said measuring hole, measuring temperature, signal collection and conversion and computer processing, etc.
Description
(1), affiliated field
What the present invention relates to is a kind of thermometry, specifically a kind ofly can carry out real-time high precision contact measurement method to small specimen surface multi-point temp in superhigh temperature, forceful electric power and the big experimental situation of disturbing.The invention still further relates to the special measurement device of this thermometry.
(2), background technology
Whether the measuring method of temperature contacts with measured medium to divide from measuring body, and contactless temperature-measuring and contact temperature-measuring two classes are arranged.
Contactless temperature-measuring is to measure temperature by accepting the radiation that measured medium sends.The major advantage of contactless temperature-measuring is: the thermometric upper limit is unrestricted in principle; Thermometric speed is very fast, can measure movable body.But it is subjected to the factor affecting such as radiance, distance, flue dust and aqueous vapor of object, and temperature measurement error is bigger.
Contact temperature-measuring is by the temperature that contacts Measuring Object of measuring body and measured medium.When measuring temperature, measuring body contacts with measured medium, carries out heat interchange between measured medium and the measuring body, reaches thermal equilibrium, and this moment, the temperature of measuring body was exactly the temperature of measured medium.The principal feature of contact temperature-measuring is: method is simple, reliable, the measuring accuracy height.But since measuring body may with measured medium generation chemical reaction, measuring body also is subjected to the restriction of exotic material, and anti-interference problem under the complex environment, can not be applied to superhigh temperature, strong interference environment.Especially for the small size test specimen that is in the above-mentioned environment; owing to the measuring junction size of the armoured thermocouple that has protective seam is very big; generally more than 3mm; and armoured thermocouple is because the restriction of outermost layer protective material; can not be applied to the measurement of superhigh temperature; though and the naked silk of thermopair measuring junction size can be very little; I reaches 0.2mm; but it directly is exposed to whole temperature acquisition loop in the middle of the measurement environment; can not be applied to strong interference environment; so will be in superhigh temperature, it almost is impossible in the strong interference environment small size test specimen being carried out the contact multipoint temperature measuring.
AC plasma electro-arc heater operating voltage is in the 3000-10000VAC scope, the test specimen temperature is more than 2300 ℃, because its three-phase neutral point of well heater oneself requirement can not ground connection, and because the restriction of physical conditions such as well heater imbalance of three-phase voltage, the voltage of its theoretical neutral point is non-vanishing, well heater is when starting and stopping, the external electromagnetic field formation electromagnetic interference (EMI) that can have greatly changed, and there is velocity of sound air-flow more than a times in heater outlet, particle diameter reaches hundreds of microns, speed surpasses the high speed large scale particle hits of 0.6 overtone speed, causes test specimen to be in a superhigh temperature, in forceful electric power and the big environment that disturbs.Can't carry out contact type measurement to the test specimen surface temperature that is under the above-mentioned environment by thermopair at present.
(3), summary of the invention
The object of the present invention is to provide a kind of can be in superhigh temperature, in forceful electric power and the big environment that disturbs the multi-point temp on small size test specimen surface is carried out the heat proof material ablation temperature field method for real-time measurement of real-time high precision contact type measurement.The present invention also aims to provide the special measurement device of this temperature field method for real-time measurement.
Method of the present invention comprises:
Need carry out drill diameter and the degree of depth on the thermometric position on the test specimen surface all less than the aperture of 1mm; The other parts of measuring junction except that measurement point of " tungsten---rhenium " thermopair are protected with ceramic pipe; In the lip-deep aperture of test specimen, fill boron nitride-silicone grease potpourri; The measuring junction of " tungsten---rhenium " thermopair is implanted in boron nitride-silicone grease potpourri; Thermopair converts a plurality of temperature signals on test specimen surface to analog voltage amount input thermocouple signal acquisition device, the thermocouple signal acquisition device converts the analog voltage amount of thermopair output to digital quantity, and these digital quantities are uploaded to host computer by RS-485 asynchronous serial communication criterion and handle.
Method of the present invention is to adopt such device to realize:
It comprises the graphite end cap that is installed in two support guide rod front ends, the centre of graphite end cap has center pit, thermopair stator and thermopair compressing tablet are installed on the support guide rod, have the aperture that the heat supply galvanic couple passes on the thermopair stator, poly-tetrafluoro screw is arranged on the thermopair compressing tablet, the hole that has heat supply galvanic couple silk to draw in the middle of the poly-tetrafluoro screw, the diameter and the degree of depth are arranged all less than the aperture of 1mm on the test specimen surface, there is ceramic pipe the other parts outside of the measuring junction of thermopair except that measurement point, be filled with boron nitride-silicone grease potpourri in the lip-deep aperture of test specimen, the measuring junction of thermopair contacts with boron nitride-silicone grease potpourri, test specimen is installed in the center pit of graphite end cap, thermocouple wire links to each other with signal pickup assembly, connects host computer behind the signal pickup assembly.
Device of the present utility model can also comprise:
1, between signal pickup assembly and host computer, optical isolation is set.
2, have along the aperture of test specimen axial distribution on the thermopair stator.
The present invention has following major technique feature:
1, the pastel of the described thermocouple measurement end protective seam thickness that to be certain proportion be mixed and made into pulverous boron nitride and heat transfer silicone grease; this potpourri has good heat conduction-insulativity in hyperthermal environments; and physical behavior is stable; in protection temperature acquisition loop; dwindled the size of thermocouple measurement point greatly, temperature measurement system can be measured small size test specimen surface multi-point temp.
2, thermocouple measurement end stationary installation comprises the graphite end cap, guide rod, thermopair stator, parts such as thermopair compressing tablet.Because the naked silk of thermopair is softer, exists unstable external force to do the time spent, guaranteed that the thermocouple measurement end keeps well contacting with test specimen, has improved thermometric accuracy in experimentation in measurement environment.
3, the present invention has realized that by optical isolation the physics between computing machine and the signals collecting loop cuts off; not only eliminated noise effectively; and solved problems such as long line driving and impedance matching effectively, can when the equipment under test short circuit, protection system not be damaged simultaneously yet.
Mainly by the naked silk of " tungsten-rhenium " thermopair, the thermocouple signal acquisition device constitutes the temperature signal collection loop in the present invention.The naked silk of thermopair that reaches 0.1mm by the I of diameter is converted to voltage with the non electrical quantity on test specimen surface, again by can be to the most nearly 8 the tunnel, error is carried out 6-10 time/second high speed acquisition less than 0.2 grade thermocouple signal acquisition device to thermocouple output signal, and the signal that collects is uploaded to host computer with the digital quantity form by RS-485 asynchronous serial communication criterion handles, can finish the collection of temperature data.
Between thermocouple measurement end and test specimen, inject the pulverous boron nitride that mixes by a certain percentage and the pastel of heat transfer silicone grease thickness, this potpourri still has good heat conduction-insulativity in the hyperthermal environments more than 2300 ℃, and physical behavior is stable, can be well that temperature survey loop and extraneous forceful electric power environmental facies is isolated when not influencing temperature signal measurement by the injection of this potpourri.
Thermocouple fixing device can guarantee not break away between thermopair softer in the environment that has unstable external force to exist naked silk measuring junction and the test specimen; this device comprises the graphite end cap; guide rod; the thermopair stator; the thermopair compressing tablet, guide rod wherein, thermopair stator and compressing tablet have stainless steel and make; the graphite end cap has good superhigh temperature physical strength can stop positive superhigh temperature air-flow and particle, plays the effect of protection back thermocouple measurement end.The center pit of graphite end cap is used to install test specimen, have on the thermopair stator along the axial a series of apertures of test specimen, these apertures can carry out horizontal location to thermopair, the poly-tetrafluoro screw that screws on the thermopair compressing tablet can carry out perpendicular positioning to thermopair, poly-tetrafluoro screw is drilled with a pair of aperture at axis direction, and the thermopair thermo wires is by being drawn out on the thermocouple signal measurement mechanism in these two apertures.Thermopair stator and compressing tablet can slide along stainless steel guide rod axis direction, and are fixed on the guide rod by fixed screw.
Connect up to the optical isolation that insulate more than the 10000VAC on the digital line between thermocouple signal measurement mechanism and the computing machine; in system's thermometric process; if thermocouple measurement end protective seam lost efficacy, spacer assembly can effectively protect central computer and operating personnel to be unlikely to touch 10000VAC high-tension electricity in the test environment.
The present invention can be in superhigh temperature, operate as normal in forceful electric power and the big interference environment, and I is to diameter 20mm, and the following small size test specimen of length 40mm carries out the real-time contact formula of surperficial multi-point temp and measures.
The results showed, the present invention is at 10000VAC, more than 2300 ℃, strong electromagnetic, there is velocity of sound air-flow more than a times, in the environment of high speed large scale particle hits (particle diameter reaches hundreds of microns, and speed surpasses 0.6 overtone speed), when with the speed of 10 times/S test specimen being carried out 3 surface temperature measurements, error is no more than error and is no more than 50 ℃.
(4), description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the A-A cut-open view of Fig. 3.
(5), specific embodiments
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
Need carry out drill diameter and the degree of depth on the thermometric position on the test specimen surface all less than the aperture of 1mm; The other parts of measuring junction except that measurement point of " tungsten---rhenium " thermopair are protected with ceramic pipe; In the lip-deep aperture of test specimen, fill boron nitride-silicone grease potpourri; The measuring junction of " tungsten---rhenium " thermopair is contacted with boron nitride-silicone grease potpourri; Thermopair converts a plurality of temperature signals on test specimen surface to analog voltage amount input thermocouple signal acquisition device, the thermocouple signal acquisition device converts the analog voltage amount of thermopair output to digital quantity, and these digital quantities are uploaded to host computer by RS-485 asynchronous serial communication criterion and handle.
In conjunction with the accompanying drawings, the inventive system comprises the graphite end cap 1 that is installed in two support guide rod 12 front ends.The centre of graphite end cap has center pit.Thermopair stator 14 and thermopair compressing tablet 15 are installed on the support guide rod, have the aperture that the heat supply galvanic couple passes on the thermopair stator, and have along the aperture of test specimen axial distribution on the thermopair stator.Poly-tetrafluoro screw 13 is arranged, the hole that has heat supply galvanic couple silk to draw in the middle of the poly-tetrafluoro screw on the thermopair compressing tablet.The diameter and the degree of depth are arranged all less than the aperture of 1mm on test specimen 2 surfaces.There is ceramic pipe 5 the other parts outside of the measuring junction of thermopair 4 except that measurement point.Be filled with boron nitride-silicone grease potpourri 3 in the lip-deep aperture of test specimen.The measuring junction of thermopair is implanted in boron nitride-silicone grease potpourri.Test specimen is installed in the center pit of graphite end cap.Thermocouple wire links to each other with signal pickup assembly 6.Signal pickup assembly links to each other with optical isolation 7.Connect host computer 8 behind the optical isolation.
Test specimen is installed in the center pit of thermopair support graphite end cap; " tungsten-rhenium " thermopair that puts ceramic pipe is carried out the fixing of horizontal direction by the aperture on the thermopair stator on the support; the ceramic pipe of regulating the poly-tetrafluoro screw assurance protection thermopair on the thermopair compressing tablet on the support closely contacts with test specimen, and the thermopair stator is connected with the support guide rod by screw with compressing tablet.Thermocouple wire is drawn from the center pit of poly-tetrafluoro screw, and link to each other with signal pickup assembly.To inject by " boron nitride-silicone grease " potpourri that is deployed into pasty state.The connection of signal pickup assembly is linked to each other with host computer through optical isolation.
Claims (4)
1, a kind of heat proof material ablation temperature field method for real-time measurement is characterized in that: need carry out drill diameter and the degree of depth on the thermometric position on the test specimen surface all less than the aperture of 1mm; The other parts of measuring junction except that measurement point of " tungsten---rhenium " thermopair are protected with ceramic pipe; In the lip-deep aperture of test specimen, fill boron nitride-silicone grease potpourri; The measuring junction of " tungsten---rhenium " thermopair is implanted in boron nitride-silicone grease potpourri; Thermopair converts a plurality of temperature signals on test specimen surface to analog voltage amount input thermocouple signal acquisition device, the thermocouple signal acquisition device converts the analog voltage amount of thermopair output to digital quantity, and these digital quantities are uploaded to host computer by RS-485 asynchronous serial communication criterion and handle.
2, a kind of special measurement device of heat proof material ablation temperature field method for real-time measurement, it is characterized in that: it comprises the graphite end cap that is installed in two support guide rod front ends, the centre of graphite end cap has center pit, thermopair stator and thermopair compressing tablet are installed on the support guide rod, have the aperture that the heat supply galvanic couple passes on the thermopair stator, poly-tetrafluoro screw is arranged on the thermopair compressing tablet, the hole that has heat supply galvanic couple silk to draw in the middle of the poly-tetrafluoro screw, the diameter and the degree of depth are arranged all less than the aperture of 1mm on the test specimen surface, there is ceramic pipe the other parts outside of the measuring junction of thermopair except that measurement point, be filled with boron nitride-silicone grease potpourri in the lip-deep aperture of test specimen, the measuring junction of thermopair is implanted in boron nitride-silicone grease potpourri, test specimen is installed in the center pit of graphite end cap, thermocouple wire links to each other with signal pickup assembly, connects host computer behind the signal pickup assembly.
3, the special measurement device of heat proof material ablation temperature field method for real-time measurement according to claim 2 is characterized in that: between signal pickup assembly and host computer optical isolation is set.
4, according to the special measurement device of claim 2 or 3 described heat proof material ablation temperature field method for real-time measurement, it is characterized in that: have along the aperture of test specimen axial distribution on the thermopair stator.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100101997A CN100348958C (en) | 2005-07-20 | 2005-07-20 | Real time measuring method of heat proof material ablation temperature field and its special measuring device |
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| CNB2005100101997A CN100348958C (en) | 2005-07-20 | 2005-07-20 | Real time measuring method of heat proof material ablation temperature field and its special measuring device |
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| CN100348958C CN100348958C (en) | 2007-11-14 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949959A (en) * | 2010-09-13 | 2011-01-19 | 中国科学院物理研究所 | High-temperature resistivity measuring stand |
| CN103592047A (en) * | 2013-11-27 | 2014-02-19 | 机械科学研究院哈尔滨焊接研究所 | Friction-stir welding friction interface temperature measuring device |
| CN104198074A (en) * | 2014-09-11 | 2014-12-10 | 中国工程物理研究院化工材料研究所 | Copper-constantan thermocouple and preparation method thereof |
| CN105865658A (en) * | 2015-01-23 | 2016-08-17 | 北京空间飞行器总体设计部 | Ground calibration method of miniature sheathed thermocouple |
| CN105890790A (en) * | 2015-01-23 | 2016-08-24 | 北京空间飞行器总体设计部 | Temperature measurement method of heat protection structure with gradient distribution of temperature |
| CN108088578A (en) * | 2017-11-22 | 2018-05-29 | 哈尔滨理工大学 | A kind of method for measuring " S " test specimen five-shaft numerical control process temperature |
| CN109142085A (en) * | 2018-10-10 | 2019-01-04 | 哈尔滨工业大学 | A kind of thermal protection on-line analysis system and method based on dynamic data driving |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2211548Y (en) * | 1995-01-17 | 1995-11-01 | 冶金工业部钢铁研究总院 | Air feeding apparatus from furnace bottom and with temperature moniter |
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2005
- 2005-07-20 CN CNB2005100101997A patent/CN100348958C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949959A (en) * | 2010-09-13 | 2011-01-19 | 中国科学院物理研究所 | High-temperature resistivity measuring stand |
| CN103592047A (en) * | 2013-11-27 | 2014-02-19 | 机械科学研究院哈尔滨焊接研究所 | Friction-stir welding friction interface temperature measuring device |
| CN103592047B (en) * | 2013-11-27 | 2016-01-06 | 机械科学研究院哈尔滨焊接研究所 | Agitating friction welding frictional interface temperature measuring equipment |
| CN104198074A (en) * | 2014-09-11 | 2014-12-10 | 中国工程物理研究院化工材料研究所 | Copper-constantan thermocouple and preparation method thereof |
| CN105865658A (en) * | 2015-01-23 | 2016-08-17 | 北京空间飞行器总体设计部 | Ground calibration method of miniature sheathed thermocouple |
| CN105890790A (en) * | 2015-01-23 | 2016-08-24 | 北京空间飞行器总体设计部 | Temperature measurement method of heat protection structure with gradient distribution of temperature |
| CN105865658B (en) * | 2015-01-23 | 2018-08-07 | 北京空间飞行器总体设计部 | A kind of ground scaling method of miniature armoured thermocouple |
| CN105890790B (en) * | 2015-01-23 | 2018-09-14 | 北京空间飞行器总体设计部 | A kind of thermal protection struc ture temp measuring method of temperature formula distribution in gradient |
| CN108088578A (en) * | 2017-11-22 | 2018-05-29 | 哈尔滨理工大学 | A kind of method for measuring " S " test specimen five-shaft numerical control process temperature |
| CN109142085A (en) * | 2018-10-10 | 2019-01-04 | 哈尔滨工业大学 | A kind of thermal protection on-line analysis system and method based on dynamic data driving |
| CN109142085B (en) * | 2018-10-10 | 2019-07-26 | 哈尔滨工业大学 | A kind of thermal protection on-line analysis system and method based on dynamic data driving |
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| CN100348958C (en) | 2007-11-14 |
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