CN104180925A - Temperature measuring method via displacement - Google Patents
Temperature measuring method via displacement Download PDFInfo
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- CN104180925A CN104180925A CN201410372142.0A CN201410372142A CN104180925A CN 104180925 A CN104180925 A CN 104180925A CN 201410372142 A CN201410372142 A CN 201410372142A CN 104180925 A CN104180925 A CN 104180925A
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Abstract
The invention relates to a temperature measuring method via displacement, and belongs to the field of temperature detection. The method is characterized in that a fixed object, a temperature measured object and a displacement object are arranged in a furnace, a temperature measuring point is determined, and the temperature of the position where the temperature measured object is placed is measured by displacement of the displacement object relative to the fixed object or other reference object. The method in the invention can be used to measure the temperature of positions that are hard to observe directly, determination is obvious, influence of too high temperature, environmental redox atmosphere and spectrum is avoided, implementation is simple and stable, and expensive temperature measuring devices are not needed.
Description
Technical field
The invention belongs to temperature detection field, relate in particular to a kind of displacement thermometry.
Background technology
Artificial-synthetic crystal's experimental technique develops rapidly in recent years, a large amount of important crystalline materials have successfully been synthesized, as laser material, semiconductor material, magnetic material, synthetic cut stone and the desired crystalline material with features of other various modern science and technology.Current artificial-synthetic crystal has become an important component part in the material science of the main pillar of industrial development.Artificial-synthetic crystal's main path be from solution, cultivate and under High Temperature High Pressure by the transformation of the many pictures of homogeneity prepare (as with graphite-made for adamas) etc., preparation method has multiple.Affecting crystal growth has factors, such as the flowing of Temperature Distribution (temperature), atmosphere, concentration of component distribution, pressure, solution/melt, the speed of growth etc.
Wherein temperature is to affect whether crystal grows or one of the key factor of quality, therefore control suitable temperature extremely important, required temperature how being detected is also the problem of considering at present, especially the detection of some ad-hoc location temperature, in the crystal growth at bottom seeded solution growth, seed crystal place temperature, owing to cannot directly observing, is difficult to Measurement accuracy, and production scientific research is all brought to very large inconvenience.
Also have some as ceramic high temperature sintering furnace, some positions in some smelting and processing of metals equipment need thermometric, but can be subject to stronger air-flow, and the impact of liquid stream, causes thermometric inaccurate.Or some complicated machineries, in equipment, owing to blocking or will look after motion etc., also can cause being difficult to general common methods thermometric.
Many detection methods are to use infrared spectrum class and thermocouple class means thermometric now.But due to all restrictions of measurement point environment of living in and measuring equipment, often face under high temperature and be difficult to accurately, the problem of stably measured temperature.Such as infrared and spectroscopic temperature measurement cannot thermometric for the position that cannot directly observe, and thermocouple thermometric is very responsive for redox condition under high temperature, easily damage, thereby on precision and stability, is difficult to satisfy the demands.
Such as conventional annealing furnace and some firing equipments, because the inner chamber body heating exists certain space, in this space, due to the distribution of well heater, can produce temperature differences in different places, the thermocouple temperature of living in of popping one's head in is often not equal to the temperature of institute's location survey warm spot, even may greatly differ from each other.And the especially high thermocouple temperature of temperature-measuring heat couple wherein, not only precision and serviceable life and reliability are limited, especially being difficult to some probes of Accurate Measurement is difficult to arrive, even due to furnace atmosphere, such as stronger carbon atmosphere corrodes, cause using some temperature-measuring heat couples, just more have no way of having measured the temperature of institute's location survey warm spot.
Summary of the invention
In order to solve above technical matters, the invention provides a kind of displacement thermometry, the method is accurate, whether the temperature that stably judges invisible position reaches a certain particular temperature value, how the operation steps of determining lower step with this carries out, and such as cooling or intensification, can measure the temperature conditions of the position that is difficult to observe directly, judgement obviously, be not subject to excess Temperature, environmental oxidation reducing atmosphere, the impact such as spectrum is disturbed, be easy to implement stable, without any need for expensive temperature measuring equipment device.
Solve a kind of displacement thermometry in the present invention of above technical matters, it is characterized in that: comprise following steps:
(1) determine as requested the point for measuring temperature of thermometric thing during shove charge, shove charge structure is made to corresponding adjustment, make point for measuring temperature place there is fixture and displacement thing, and install fixture and displacement thing; In different systems, use the method also to have corresponding different structure;
(2) according to thermometric thing fusing point, determine the estimated temperature of point for measuring temperature;
(3) according to actual requirement, make in stove temperature raise, when temperature approaches 50 ~ 200 ℃ of estimated temperature, observe displacement thing and whether move with respect to fixture;
(4) if displacement thing is not mobile, continue heat temperature raising; If displacement thing moves, suspend and heat up, formulate parameter, with this, determine corresponding next step technique.
Described observation has eyes directly to observe, and the indirect observation such as transmission that also can be by signal and conversion realizes.
Fixture, thermometric thing and displacement thing can be one, can be also two or more, meet corresponding thermometric demand.Fixture, the size of thermometric thing and material are selected, and mode and the distance of the displacement of displacement thing, all will make a choice and adjust according to real needs.
In the present invention, utilize thermometric thing limiting displacement thing with respect to the displacement of fixture or other object of reference, limiting displacement thing again after thermometric thing arrives uniform temperature (as X ℃), displacement thing is subjected to displacement.By observing directly or indirectly displacement thing with respect to the displacement of fixture or other object of reference, judge that thermometric thing present position temperature reaches this temperature (X ℃) again.
No matter the quantity of fixture, displacement thing and thermometric thing, material, structure, stressed and ways to restrain; environment of living in; displacement mode and size; directly observe displacement still by the indirect mode observation displacement arbitrarily such as equipment, signal transmission, conversion; or the replacement of other material structure etc.; as long as meet above, be this technical protection scope.
Detection method in the present invention can be applicable to the thermometric of difficult temperature measurement location in artificial crystal growth process, also can be applicable to such as ceramic post sintering, thermal treatment, material is smelted, processing, must measure some position temperature in most of pilot productions such as chemosynthesis, especially measures this point and whether arrives required temperature, but be difficult to spectroscopic temperature measurement, among the various scientific research and testing that the conventional meanses such as thermocouple probe are directly measured and production.
Accompanying drawing explanation
?fig. 1 is the structural representation in embodiment 1 in the present invention
Fig. 2 is the structural representation in embodiment 2 in the present invention
Fig. 3 is the structural representation in embodiment 3 in the present invention
Fig. 4 is the structural representation in embodiment 4 in the present invention
Wherein, in figure, be specifically designated: 1. displacement thing 2. solidfied material 3. thermometric thing 4. point for measuring temperature 5. displacement 6. observation panel 7. closed roof 8. molybdenum filament 9. crucible 10. seed crystal pipe 11. crucible tray 12. tempilstick 13. seed crystal supports 14. are heat-treated thing 15. well heater 16. thermocouples 17. sapphires of popping one's head in
Embodiment
Embodiment 1
A displacement thermometry, comprises following steps:
(1) determine as requested the point for measuring temperature of thermometric thing during shove charge, shove charge structure is made to corresponding adjustment, make point for measuring temperature place there is fixture and displacement thing, and install fixture and displacement thing;
(2) according to thermometric thing fusing point, determine the estimated temperature of point for measuring temperature;
(3) according to actual requirement, make in stove temperature raise, when temperature approaches 50 ~ 200 ℃ of estimated temperature, observe displacement thing and whether move with respect to fixture;
(4) if displacement thing is not mobile, continue heat temperature raising; If displacement thing moves, suspend and heat up, formulate parameter, with this, determine corresponding next step technique.
Described observation has eyes directly to observe, and the indirect observation such as transmission that also can be by signal and conversion realizes.
Bridgman-Stockbarger method is example, and fixture, thermometric thing and displacement object location as shown in Figure 1, are measured point for measuring temperature temperature by displacement thing and whether reached a certain fixed temperature, by observation panel, observe directly displacement as criterion.
The fixture that this structure is fixed by relative environment position, to assign fixed temperature at working environment, just can produce softening, fusing or chemical reaction or other and change arbitrarily, finally cause its thermometric thing no longer can limiting displacement deposits yields being subjected to displacement with respect to fixture or other object of reference, and displacement thing forms.
Displacement thing is subject to the restriction of thermometric thing and is fixed, thermometric thing arrives a certain temperature again after limiting displacement thing, displacement thing can be because of such as gravity (as Fig. 1), buoyancy, pressure, pulling force or other any environmental factor naturally-occurring displacement, and can indirectly or directly be observed (as Fig. 1 observes directly by observation panel).
In temperature-rise period, when thermometric thing arrives after a certain fixed temperature, when limiting displacement thing moves with respect to fixture or other object of reference again, displacement thing just can produce displacement, and indirectly or is directly observed.By the displacement of observing, indicate place, thermometric thing place temperature and reach a certain fixed temperature, to play the effect of thermometric.Fixture, thermometric thing and displacement thing can be one, can be also a plurality of, to meet corresponding thermometric demand.Fixture, the size of thermometric thing and material are selected, and mode and the distance of the displacement of displacement thing, all will make a choice and adjust according to real needs.
Embodiment 2
The Bridgman-Stockbarge method for growing YAG crystal of take is example, need to know crucible bottom point for measuring temperature place temperature, in intensification, reaches YAG fusing point during how much power, just use YAG crystal as thermometric thing, crucible is as displacement thing, and temperature field is as fixture, as Fig. 2 structure.After utilizing YAG crystal to arrive fusing point, fusing cannot continue support crucible, and crucible is subjected to displacement, thereby knows that temperature reaches fusing point herein.
Except general direct observation, also just like Fig. 2, by increasing briquetting and molybdenum filament syndeton, or by equipment such as grating scales, indirectly observe the displacement of displacement thing, so one-piece construction also has corresponding variation.
Concrete operation step is as follows:
(1) shove charge adopts surveyor's staff, length ruler, and slide calliper rule reach necessary requirement to guarantee total, require to have fixture, thermometric thing and displacement thing in stove, determine point for measuring temperature.
(2) carrying out crystal oven vacuumizes and certainty ratio inflation and total pressure-controlled technique.
(3) start intermediate frequency power supply, utilizing Continental Europe table to control heats up. according to different atmosphere, utilize W-Re or platinum rhodium thermocouple, coordinate Continental Europe to show corresponding PV value, the power on power table and experience, the Continental Europe PV value speed according to technique with 100-300 ℃/h or equivalence with it heats up.
(4) rule of thumb, by thermocouple or Continental Europe, show, power meter reading obtains the poor temperature estimated value of precision, when estimated value reaches lower than target temperature 50-200 ℃, change with the intensification at a slow speed lower than 50 ℃/h, because brightness under furnace high-temperature is dazzling, so need to use sunglasses frequently to observe displacement thing, whether there is displacement.
(5) observe after displacement and suspend and heat up, by operator on duty notification technique person, formulate parameter, and carry out corresponding next step technique.
Embodiment 3
With Bridgman-Stockbarge method for growing crystal, in the present embodiment, displacement thing is seed crystal support, and thermometric thing has become tempilstick by piece, observes and has become indirectly and need to use grating scale, and other operation steps is as the content in embodiment 1.
Be the situation of descent method equally, in Fig. 3, seed crystal pipe inserts hollow seed crystal support, can not hinder seed crystal support motion.
The displacement of seed crystal support cannot directly be observed, but is monitored by below grating scale, and is subject to motor support and moves up, until tempilstick is pushed up in its side, and is subject to its obstruction cannot continue to move up.
In slow temperature-rise period, tempilstick top starts fusing gradually after reaching tempilstick fusing point, and seed crystal support is moved upward by motor support power.In the present embodiment, displacement judges indirectly by the reading of grating scale.
Though can find out that the present embodiment is with being applied to Bridgman-Stockbarger method, measure the temperature of same position, but other the scheme of taking due to specific demand, cause the structure of whole displacement thermometry, mode of motion, the stressed limited manner of displacement thing is all different with other example.
Embodiment 4
As shown in Figure 4, in the thermal treatment of various materials, heating source is difficult to space uniform and distributes, and just has the problem that need to measure institute's handled thing temperature, but such as the fixing distance that exists of thermocouple, also just there is temperature difference, or cause being difficult to Measurement accuracy temperature because heat-treating atmosphere can corrode the situations such as thermocouple.
In kind of situation, can directly be heat-treated thing underlay one thermometric thing, after needs thermal treatment arrives 2050 degrees Celsius, do cycle annealing cooling processing slowly again, be heat-treated the thick fritter sapphire of about 5mm of thing underlay.
In this example, sapphire piece is thermometric thing, and being heat-treated thing is displacement thing, and the platform that placement is heat-treated thing is fixture.Concrete operations are as follows:
1. in stove, install and be heat-treated phenology, make heat-treatment furnace continue rising heating power with persistently overheating.
2. necessarily adding under heat control parameter its lower the sapphire that pads fusing.Therefore thermal treatment thing produces displacement, becomes state while not padding sapphire, can observe directly.The thing that is heat-treated directly contacting with this observations explanation sapphire piece reaches 2050 degrees Celsius, now can stop heating up, and enters the operation of next step constant temperature and cooling.
In displacement thermometry in the present invention, in stove, there is fixture, thermometric thing and displacement thing, determine point for measuring temperature, by displacement thing, with respect to the displacement of fixture or other object of reference, reach the effect of the temperature of measuring thermometric thing present position.
Bridgman-Stockbarger method makes crystal growth high temperature and 2 kinds of crystal of low temperature, by the method in embodiment 2, detects seed crystal fusing situation, measures its seed crystal fusing length:
Seed crystal fusing length test findings is as following table:
From above form, can find out, with temp measuring method thermometric of the present invention, all heats of thermometric, seed crystal depth of fusion is all controlled at 5 ~ 20mm, and the normal appearance of traditional thermometric is not melted or fine melt phenomenon because thermometric problem causes seed crystal, the long fluctuation range of seed crystal fusing reaches in the scope of 0 ~ 50mm.Displacement temp measuring method in the present invention is compared classic method thus high accuracy and reliability, and be applied in the not equality of temperature field of growth different crystal and correspondence, all show higher accuracy, reliability and operation possibility, operation ease, has suitable universality.
Displacement thermometry in the present invention can be measured the temperature conditions of the position that is difficult to observe directly, and judgement obviously, is not subject to excess Temperature, environmental oxidation reducing atmosphere, and the impact such as spectrum is disturbed, and is easy to implement stable, without any need for expensive temperature measuring equipment device.
Claims (2)
1. a displacement thermometry, is characterized in that: comprise following steps:
(1) determine as requested the point for measuring temperature of thermometric thing during shove charge, shove charge structure is made to corresponding adjustment, make point for measuring temperature place there is fixture and displacement thing, and fixture and displacement thing are installed;
(2) according to thermometric thing fusing point, determine the estimated temperature of point for measuring temperature;
(3) according to actual requirement, temperature in stove is raise, when temperature approaches estimated temperature 50-200 ℃, observe displacement thing and whether move with respect to fixture;
(4) if displacement thing is not mobile, continue heat temperature raising; If displacement thing moves, suspend and heat up, formulate parameter, with this, determine corresponding next step technique.
2. according to a kind of displacement thermometry described in claim 1, it is characterized in that: described observation has eyes directly to observe, or realize by transmission, the conversion indirect observation of signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372142.0A CN104180925A (en) | 2014-07-31 | 2014-07-31 | Temperature measuring method via displacement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410372142.0A CN104180925A (en) | 2014-07-31 | 2014-07-31 | Temperature measuring method via displacement |
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| CN104180925A true CN104180925A (en) | 2014-12-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551254A (en) * | 2019-02-11 | 2020-08-18 | 莫铂桑(北京)科技有限公司 | Method for accurately setting temperature |
| CN113607593A (en) * | 2021-07-30 | 2021-11-05 | 成都东骏激光股份有限公司 | Temperature measuring method for core area of temperature field in preparation process of high-temperature material |
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| GB2352303A (en) * | 1999-07-21 | 2001-01-24 | Ibm | Temperature calibration of a thermogravimetric analyser |
| GB2415784A (en) * | 2004-06-30 | 2006-01-04 | Secr Defence | Apparatus for determining if an environment temperature exceeds a threshold |
| JP2007120950A (en) * | 2005-10-25 | 2007-05-17 | Tohoku Univ | Temperature measuring method |
| CN201850329U (en) * | 2010-11-08 | 2011-06-01 | 鸿福晶体科技(安徽)有限公司 | Single crystal growth monitor of jewels |
| CN103726105A (en) * | 2013-10-11 | 2014-04-16 | 中国科学院上海光学精密机械研究所 | Growing apparatus and method for Ti sapphire crystal |
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2014
- 2014-07-31 CN CN201410372142.0A patent/CN104180925A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2352303A (en) * | 1999-07-21 | 2001-01-24 | Ibm | Temperature calibration of a thermogravimetric analyser |
| GB2415784A (en) * | 2004-06-30 | 2006-01-04 | Secr Defence | Apparatus for determining if an environment temperature exceeds a threshold |
| JP2007120950A (en) * | 2005-10-25 | 2007-05-17 | Tohoku Univ | Temperature measuring method |
| CN201850329U (en) * | 2010-11-08 | 2011-06-01 | 鸿福晶体科技(安徽)有限公司 | Single crystal growth monitor of jewels |
| CN103726105A (en) * | 2013-10-11 | 2014-04-16 | 中国科学院上海光学精密机械研究所 | Growing apparatus and method for Ti sapphire crystal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551254A (en) * | 2019-02-11 | 2020-08-18 | 莫铂桑(北京)科技有限公司 | Method for accurately setting temperature |
| CN113607593A (en) * | 2021-07-30 | 2021-11-05 | 成都东骏激光股份有限公司 | Temperature measuring method for core area of temperature field in preparation process of high-temperature material |
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