CN109405989A - The extension measurement method of graphite crucible thermal field under a kind of high temperature elevated temp - Google Patents
The extension measurement method of graphite crucible thermal field under a kind of high temperature elevated temp Download PDFInfo
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- CN109405989A CN109405989A CN201811199659.9A CN201811199659A CN109405989A CN 109405989 A CN109405989 A CN 109405989A CN 201811199659 A CN201811199659 A CN 201811199659A CN 109405989 A CN109405989 A CN 109405989A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/14—Arrangements for modifying the output characteristic, e.g. linearising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The invention belongs to temperature field measurement technical fields, more particularly under a kind of high temperature elevated temp graphite crucible thermal field extension measurement method, this method includes dividing it in average into several segments according to graphite crucible height in heating thermal field, in one thermocouple for measuring temperature of every section of graphite crucible setting of segmentation, if graphite crucible is within the scope of 500 DEG C~1500 DEG C in the thermal field that heats up, pass through sample record temperature measurement data and forms { the thermometric sampled data at each moment, N number of thermocouple temperature value } it is the sampling data table gathered, the corresponding thermocouple temperature value of the thermometric sampled data at moment each in sampling data table is fitted to warming law curve by data fitting method, the domain and codomain of extension warming law curve simultaneously form extension warming law curve, the present invention solves the prior art using conventional thermocouple temperature measurement, when temperature is more than At 2000 DEG C, the problem of temperature measuring equipment is failed due to overheat, has and solves pyrographite crucible and be difficult to that the engineering problem of thermometric, measurement be uniform and advantageous effects with high accuracy.
Description
Technical field
The invention belongs to graphite crucible thermal fields under temperature field measurement technical field more particularly to a kind of high temperature elevated temp to prolong
Open up measurement method.
Background technique
Currently, temperature field measurement is using the heating heating of thermal field uniform gradient, temperature T is in room temperature (20 DEG C)~2500 DEG C of ranges
It is interior, it can be assumed that when T is within the scope of room temperature (20 DEG C)~2500 DEG C, thermal field is (cold start-up) of transient state, when T is 500~2500
It when within the scope of DEG C, uniformly heats up (stationary field) for stable state, the prior art is using conventional thermocouple temperature measurement, when temperature is more than 2000
DEG C when, the problem of temperature measuring equipment is failed due to overheat.
Summary of the invention
The present invention provides a kind of extension measurement method of graphite crucible thermal field under high temperature elevated temp, to solve above-mentioned background
The prior art is proposed in technology using conventional thermocouple temperature measurement, when temperature is more than 2000 DEG C, temperature measuring equipment is due to overheat
And the problem of failing.
Technical problem solved by the invention is realized using following technical scheme: graphite earthenware under a kind of high temperature elevated temp
The extension measurement method of crucible thermal field, comprising:
Graphite crucible is built in heating thermal field；
Several segments are divided it in average into according to graphite crucible height in heating thermal field, in every section of graphite crucible setting of segmentation
One thermocouple for measuring temperature；
If graphite crucible by sample record temperature measurement data and is formed within the scope of 500 DEG C~1500 DEG C in the thermal field that heats up
{ the thermometric sampled data at each moment, N number of thermocouple temperature value } is the sampling data table of set；
The method of sampling are as follows:
Tj+1=Tj+ΔT (j=0,1 ..., M)；
Wherein:
The T0It is 500 DEG C；
The TMIt is 1500 DEG C；
The Δ T is sampling interval temperature；
The TjFor present sample temperature；
The Tj+1For sample temperature next time；
The corresponding thermocouple temperature value of the thermometric sampled data at moment each in sampling data table is passed through into data fitting method
It is fitted to { the thermometric sampled data T at each momentj, thermocouple temperature value KjWarming law curve；
The warming law curve are as follows: K=Φ (T) T ∈ [500 DEG C, 1500 DEG C]；
Wherein:
The T is the thermometric sampled data at each moment within the scope of 500 DEG C~1500 DEG C；
The K is thermocouple temperature value after the corresponding fitting of thermometric sampled data at each moment；
The domain and codomain of extension warming law curve simultaneously form extension warming law curve；
The extension warming law curve are as follows:T∈[500℃,2500℃]；
Wherein:
The T represents the thermometric time of any moment within the scope of 500 DEG C~2500 DEG C；
The K corresponds to T moment, the value of graphite crucible thermal field.
Further, the heating thermal field is formed by winding resistance coil outside quartz ampoule.
Further, the heating thermal field uniform gradient heating heating.
Further, the equal part function that several segments are divided it in average into according to graphite crucible height in heating thermal field are as follows:
Wherein:
The H is graphite crucible height in heating thermal field；
The N is to divide it in average into several segments according to graphite crucible height in heating thermal field；
The hiFor the height of lift of graphite crucible.
Further, described that setting sampling time interval is included by sampling temperature measurement data.
Further, the sampling data table are as follows:
Further, graphite crucible is unstable state thermal field within the scope of room temperature~500 DEG C in the heating thermal field.
Further, the data fitting method includes least square method.
Advantageous effects:
This patent, which uses, is built in graphite crucible in heating thermal field；It is put down according to graphite crucible height in heating thermal field
Several segments are divided into, in one thermocouple for measuring temperature of every section of graphite crucible setting of segmentation；If graphite crucible exists in heating thermal field
Within the scope of 500 DEG C~1500 DEG C, passes through sample record temperature measurement data and form { the thermometric sampled data at each moment, N number of thermoelectricity
Even temperature value } it is the sampling data table gathered；By the corresponding thermocouple temperature of the thermometric sampled data at moment each in sampling data table
Value is fitted to { the thermometric sampled data T at each moment by data fitting methodj, thermocouple temperature value KjHeating data acquisition system,
It will heat up data acquisition system and generate warming law curve；The warming law curve are as follows: K=Φ (T) T ∈ [500 DEG C, 1500 DEG C]；
The domain and codomain of extension warming law curve simultaneously form extension warming law curve；The extension warming law curve are as follows: K
=Φ (T) T ∈ [500 DEG C, 2500 DEG C], as to built in graphite crucible in thermal field, if want to measure its temperature rise reach 2000 DEG C~
Temperature change at 2500 DEG C, present applicant proposes a kind of extension measurement methods, and the height H of crucible is specially equally divided into N
Section (depending on actual crucible) is started to warm up in one thermocouple for measuring temperature of every section of insertion, when temperature reaches 500 DEG C, is started
Record thermometric sampled data (when room temperature~500 DEG C, being considered as unstable state thermal field) then provides sampling time interval and passes through sampling
Function, which obtains, to heat up data and forms sampling data table, meanwhile, the temperature at each moment corresponds to N number of galvanic couple temperature value, using data
Approximating method, such as least square method, are fitted sampling data table, and generate warming law curve, utilize stable state heating
Property, the domain and codomain of extension warming law curve, to obtain the measurement temperature in 500 DEG C~2500 DEG C temperature ranges
Degree, in this way using can only in 2000 DEG C of temperature measurement tools below, by stable state heating extending method, can obtain 500 DEG C~
Thermal field rule in 2500 DEG C of temperature ranges, solves the engineering problem that pyrographite crucible is difficult to thermometric.
Detailed description of the invention
Fig. 1 is the flow chart of the extension measurement method of graphite crucible thermal field under a kind of high temperature elevated temp of the present invention；
Fig. 2 be under a kind of high temperature elevated temp of the present invention in the thermal field of the extension measurement method of graphite crucible thermal field crucible and
Thermocouple structure schematic diagram；
Fig. 3 is the tubular type heating thermal field of the extension measurement method of graphite crucible thermal field under a kind of high temperature elevated temp of the present invention
Structural schematic diagram.
Specific embodiment
The present invention is described further below in conjunction with attached drawing:
In figure: 1- graphite crucible, 2- thermocouple, 3- heating thermal field；
Graphite crucible is built in heating thermal field by S1-；
S2- divides it in average into several segments according to graphite crucible height in heating thermal field, in every section of the graphite crucible of segmentation
One thermocouple for measuring temperature is set；
If S3- heats up, graphite crucible passes through sample record temperature measurement data and shape within the scope of 500 DEG C~1500 DEG C in thermal field
It is the sampling data table of set at { the thermometric sampled data at each moment, N number of thermocouple temperature value }；
The corresponding thermocouple temperature value of the thermometric sampled data at moment each in sampling data table is passed through data fitting side by S4-
Method is fitted to { the thermometric sampled data T at each momentj, thermocouple temperature value KjWarming law curve；
The domain and codomain of S5- extension warming law curve simultaneously form extension warming law curve；
Embodiment:
The present embodiment: as shown in Figure 1, under a kind of high temperature elevated temp graphite crucible thermal field extension measurement method, comprising:
Graphite crucible is built in S1 in heating thermal field；
Several segments are divided it in average into according to graphite crucible height in heating thermal field, in every section of graphite crucible setting of segmentation
One thermocouple for measuring temperature S2；
If graphite crucible by sample record temperature measurement data and is formed within the scope of 500 DEG C~1500 DEG C in the thermal field that heats up
{ the thermometric sampled data at each moment, N number of thermocouple temperature value } is the sampling data table S3 of set；
The method of sampling are as follows:
Tj+1=Tj+ΔT (j=0,1 ..., M)；
The T0It is 500 DEG C；
The TMIt is 1500 DEG C；
The Δ T is sampling interval temperature；
The TjFor present sample temperature；
The Tj+1For sample temperature next time；
The corresponding thermocouple temperature value of the thermometric sampled data at moment each in sampling data table is passed through into data fitting method
It is fitted to { the thermometric sampled data T at each momentj, thermocouple temperature value KjWarming law curve S4；
The warming law curve are as follows: K=Φ (T) T ∈ [500 DEG C, 1500 DEG C]；
Wherein:
The T is the thermometric sampled data at each moment within the scope of 500 DEG C~1500 DEG C；
The K is thermocouple temperature value after the corresponding fitting of thermometric sampled data at each moment；
The domain and codomain of extension warming law curve simultaneously form extension warming law curve S5；
The extension warming law curve are as follows:T∈[500℃,2500℃]；
Wherein:
The T represents the thermometric time of any moment within the scope of 500 DEG C~2500 DEG C；
The K corresponds to T moment, the value of graphite crucible thermal field.
Due to being built in heating thermal field using by graphite crucible；It is averaged according to graphite crucible height in heating thermal field
It is divided into several segments, in one thermocouple for measuring temperature of every section of graphite crucible setting of segmentation；If graphite crucible is 500 in the thermal field that heats up
DEG C~1500 DEG C within the scope of, recorded by sampling function and thermometric sampled data and form { the thermometric sampled data at each moment, N
A thermocouple temperature value } it is the sampling data table gathered；By the corresponding heat of thermometric sampled data at moment each in sampling data table
Galvanic couple temperature value is fitted to the heating number of { the thermometric sampled data Tj at each moment, thermocouple temperature value Kj } by data fitting method
According to set, it will heat up data acquisition system and generate warming law curve；The warming law curve are as follows: K=Φ (T) T ∈ [500 DEG C,
1500℃]；The domain and codomain of extension warming law curve simultaneously form extension warming law curve；The extension warming law
Curve are as follows:T ∈ [500 DEG C, 2500 DEG C], as in thermal field, measuring its temperature rise reaches if wanting built in graphite crucible
Temperature change at 2000 DEG C~2500 DEG C, present applicant proposes a kind of extension measurement methods, specially put down the height H of crucible
N sections (depending on actual crucibles) are divided into, in one thermocouple for measuring temperature of every section of insertion, are started to warm up, when temperature reaches 500 DEG C
When, start recording thermometric sampled data (when room temperature~500 DEG C, is considered as unstable state thermal field), then, it is logical to provide sampling time interval
Over-sampling function, which obtains, to heat up data and forms sampling data table, meanwhile, the temperature at each moment corresponds to N number of galvanic couple temperature value, adopts
With data fitting method, such as least square method, sampling data table is fitted, and generates warming law curve, utilizes stable state
The property of heating, the domain and codomain of extension warming law curve, to obtain the survey in 500 DEG C~2500 DEG C temperature ranges
Amount temperature, 500 DEG C can only can be obtained by stable state heating extending method in 2000 DEG C of temperature measurement tools below in this way by utilizing
Thermal field rule in~2500 DEG C of temperature ranges, solves the engineering problem that pyrographite crucible is difficult to thermometric.
The heating thermal field is formed by winding resistance coil outside quartz ampoule.
The heating thermal field uniform gradient heating heating.
Due to being formed using the heating thermal field by winding resistance coil outside quartz ampoule, the heating thermal field uniform gradient liter
Temperature heating, due to winding resistance coil outside quartz ampoule, the heating heating of thermal field uniform gradient, temperature T is at room temperature (20 DEG C)~2500
Within the scope of DEG C, it can be assumed that when T is within the scope of room temperature (20 DEG C)~2500 DEG C, thermal field is (cold start-up) of transient state, when T is 500
When within the scope of~2500 DEG C, (stationary field) is uniformly heated up for stable state.
The equal part function that several segments are divided it in average into according to graphite crucible height in heating thermal field are as follows:
Wherein:
The H is graphite crucible height in heating thermal field；
The N is to divide it in average into several segments according to graphite crucible height in heating thermal field；
The hiFor the height of lift of graphite crucible.
Since the equal part function of several segments is divided it in average into according to graphite crucible height in heating thermal field described in, by
Divide function setup thermocouple in use etc., the distributed architecture of multimetering guarantees the uniform of its measurement.
It is described that setting sampling time interval is included by sampling temperature measurement data.
The sampling data table are as follows:
Graphite crucible is unstable state thermal field within the scope of room temperature~500 DEG C in the heating thermal field.
Due to using in the heating thermal field graphite crucible within the scope of room temperature~500 DEG C for unstable state thermal field, due to working as
When temperature reaches 500 DEG C, start recording thermometric sampled data (when room temperature~500 DEG C, is considered as unstable state thermal field), due to unstable state
The data of thermal field are simultaneously unreliable, and therefore, its data is excluded.
The data fitting method includes least square method.
Due to including least square method using the data fitting method, due to a variety of numbers using sudden and violent more least square methods
It is fitted according to approximating method, ensure that the precision of data fitting.
Working principle:
This patent is by the way that graphite crucible to be built in heating thermal field；It is put down according to graphite crucible height in heating thermal field
Several segments are divided into, in one thermocouple for measuring temperature S2 of every section of graphite crucible setting of segmentation；If graphite crucible in the thermal field that heats up
Within the scope of 500 DEG C~1500 DEG C, thermometric sampled data is recorded by sampling function and forms { the thermometric hits at each moment
According to N number of thermocouple temperature value } it is the sampling data table S3 gathered；By the thermometric sampled data pair at moment each in sampling data table
The thermocouple temperature value answered is fitted to { the thermometric sampled data Tj at each moment, thermocouple temperature value Kj } by data fitting method
Heat up data acquisition system, will heat up data acquisition system and generates warming law curve S4；The warming law curve are as follows: K=Φ (T) T ∈
[500,1500]；The domain and codomain of extension warming law curve simultaneously form extension warming law curve S5；The extension rises
Warm law curve are as follows:T ∈ [500,2500], as in thermal field, measuring its temperature rise reaches if wanting built in graphite crucible
Temperature change when to 2000 DEG C~2500 DEG C, present applicant proposes a kind of extension measurement methods, specially by the height H of crucible
N sections (depending on actual crucibles) are equally divided into, in one thermocouple for measuring temperature of every section of insertion, are started to warm up, when temperature reaches 500
DEG C when, start recording thermometric sampled data (when room temperature~500 DEG C, is considered as unstable state thermal field), then, provides sampling time interval
Heating data are obtained by sampling function and form sampling data table, meanwhile, the temperature at each moment corresponds to N number of galvanic couple temperature value,
Using data fitting method, such as least square method, sampling data table is fitted, and generates warming law curve, using steady
The property of state heating, the domain and codomain of extension warming law curve, to obtain in 500 DEG C~2500 DEG C temperature ranges
Temperature is measured, 500 can only can be obtained by stable state heating extending method in 2000 DEG C of temperature measurement tools below in this way by utilizing
DEG C~2500 DEG C of temperature ranges in thermal field rule, the present invention solves the prior art using conventional thermocouple temperature measurement, works as temperature
When degree is more than 2000 DEG C, the problem of temperature measuring equipment is failed due to overheat, is difficult to thermometric with solving pyrographite crucible
Engineering problem measures advantageous effects uniform and with high accuracy.
Using technical solution of the present invention or those skilled in the art under the inspiration of technical solution of the present invention, design
Similar technical solution out, and reach above-mentioned technical effect, it is to fall into protection scope of the present invention.
Claims (8)
1. the extension measurement method of graphite crucible thermal field under a kind of high temperature elevated temp characterized by comprising
Graphite crucible is built in heating thermal field；
Several segments are divided it in average into according to graphite crucible height in heating thermal field, every section of graphite crucible in segmentation is arranged one
Thermocouple for measuring temperature；
If graphite crucible passes through sample record temperature measurement data and is formed { each within the scope of 500 DEG C~1500 DEG C in the thermal field that heats up
The thermometric sampled data at moment, N number of thermocouple temperature value } it is the sampling data table gathered；
The method of sampling are as follows:
Tj+1=Tj+ΔT (j=0,1 ..., M)；
Wherein:
The T0It is 500 DEG C；
The TMIt is 1500 DEG C；
The Δ T is sampling interval temperature；
The TjFor present sample temperature；
The Tj+1For sample temperature next time；
The corresponding thermocouple temperature value of the thermometric sampled data at moment each in sampling data table is fitted by data fitting method
For { the thermometric sampled data T at each momentj, thermocouple temperature value KjWarming law curve；
The warming law curve are as follows: K=Φ (T) T ∈ [500 DEG C, 1500 DEG C]；
Wherein:
The T is the thermometric sampled data at each moment within the scope of 500 DEG C~1500 DEG C；
The K is thermocouple temperature value after the corresponding fitting of thermometric sampled data at each moment；
The domain and codomain of extension warming law curve simultaneously form extension warming law curve；
The extension warming law curve are as follows:T∈[500℃,2500℃]；
Wherein:
The T represents the thermometric time of any moment within the scope of 500 DEG C~2500 DEG C；
The K corresponds to T moment, the value of graphite crucible thermal field.
2. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 1
It is, the heating thermal field is formed by winding resistance coil outside quartz ampoule.
3. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 2
It is, the heating thermal field uniform gradient heating heating.
4. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 1
It is, the equal part function that several segments are divided it in average into according to graphite crucible height in heating thermal field are as follows:
Wherein:
The H is graphite crucible height in heating thermal field；
The N is to divide it in average into several segments according to graphite crucible height in heating thermal field；
The hiFor the height of lift of graphite crucible.
5. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 1
It is, it is described that setting sampling time interval is included by sampling temperature measurement data.
6. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 1
It is, the sampling data table are as follows:
7. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 1
It is, graphite crucible is unstable state thermal field within the scope of room temperature~500 DEG C in the heating thermal field.
8. the extension measurement method of graphite crucible thermal field, feature under a kind of high temperature elevated temp according to claim 1
It is, the data fitting method includes least square method.
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| CN106092371A (en) * | 2016-06-06 | 2016-11-09 | 广州视源电子科技股份有限公司 | Method and device for predicting temperature |
| CN205784557U (en) * | 2016-04-29 | 2016-12-07 | 云南驰宏资源综合利用有限公司 | A kind of easy care, subregion temperature-controlling energy-saving environmental protection rectangle thick cadmium smelting furnace |
| CN106679848A (en) * | 2017-03-27 | 2017-05-17 | 成都天衡电科科技有限公司 | Method for fast measuring temperature by using normal temperature sensor |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120201267A1 (en) * | 2011-02-07 | 2012-08-09 | Applied Materials, Inc. | Low temperature measurement and control using low temperature pyrometry |
| CN105547499A (en) * | 2015-12-29 | 2016-05-04 | 广州视源电子科技股份有限公司 | Method and system for predicting temperature |
| CN205784557U (en) * | 2016-04-29 | 2016-12-07 | 云南驰宏资源综合利用有限公司 | A kind of easy care, subregion temperature-controlling energy-saving environmental protection rectangle thick cadmium smelting furnace |
| CN106092371A (en) * | 2016-06-06 | 2016-11-09 | 广州视源电子科技股份有限公司 | Method and device for predicting temperature |
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