CN110095199A - Utilize the method for special shape armored platinum resistance test thermostat thermal field - Google Patents
Utilize the method for special shape armored platinum resistance test thermostat thermal field Download PDFInfo
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- CN110095199A CN110095199A CN201910451864.8A CN201910451864A CN110095199A CN 110095199 A CN110095199 A CN 110095199A CN 201910451864 A CN201910451864 A CN 201910451864A CN 110095199 A CN110095199 A CN 110095199A
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- platinum resistance
- thermostat
- point
- value
- warm area
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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
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
Abstract
The invention discloses a kind of methods using special shape armored platinum resistance test thermostat thermal field, the temperature of thermostat is set in down or ceiling temperature, by two special shape armored platinum resistance and together, 1/2 depth as the fixed platinum resistance insertion shallow warm area of thermostat, it is fixed on reference position O, upper surface location A of the third branch platinum resistance as the mobile platinum resistance insertion shallow warm area of thermostat；3) it is poor relative to the temperature indicating value of O point to stablize at least 10min after thermostat reaches set temperature for the first time, read and calculate A point；4) it is kept fixed original position of platinum resistance, by the lower surface position E of the mobile platinum resistance insertion shallow warm area of thermostat；It is read after two fixed platinum resistance indicating value variations are stablized, it is poor relative to the indicating value of O point to calculate E point；5) the rest may be inferred, and it is poor relative to the indicating value of O point to respectively obtain in the upper and lower surface of the shallow warm area of thermostat other；6) maximum temperature difference of the shallow warm area upper and lower surface of thermostat and the maximum temperature difference of the shallow warm area of thermostat are calculated.
Description
Technical field
The present invention relates to a kind of thermostat thermal field test methods, especially a kind of to test constant temperature using special shape armored platinum resistance
The method of bath temperature field.
Background technique
Existing thermostat temperature field measurement method is formulated according to national calibrating standard JJF1030-2010 as shown in Figure 1, is existed
Following defect.
1. the use of standard platinum resistance being sensor, cost is high, easy to damage in JJF1030-2010 (hereinafter referred to as JJF).
2. measuring staff is quartz glass, because sensor is straight-bar, mobile platinum resistance submergence D is soaked equal to sensor
Do not have total length W.Because there is leakage heat in sensor, and according to measuring:
When W > N*d, S=tIt is interior；
When W < N*d, S < tIt is interior。
Wherein N is that temperature is positively correlated in proportionality coefficient, with thermostat, and mobile platinum resistance submergence is D, and sensor is straight
Diameter is d, outdoor temperature tOutside, temperature is t in thermostatIt is interior, sensor observed temperature is S
That is: when d is fixed:
(1) if W very little, that is, when moving platinum resistance and being in shallow working region, sensor temperature S can be less than practical constant temperature bath temperature
Spend tIt is interior；
(2) if N is very big, i.e., when thermostat operating temperature is very high, sensor temperature S can be less than practical thermostat temperature tIt is interior,
Even it all can not find suitable temperature measuring point in entire thermostat working depth.And there is many high temperature (300 DEG C of >) work at this stage
The thermostat of work.
According to above formula, thermostat liquid level D value with inner part (shallow warm area) due to sensor can not true thermometric, cause
Thermal field situation can not be evaluated within the scope of this.
Error increases basic reason:
The length that the accurate thermometric of sensor needs to submerge liquid is not less than N times of sensor diameter, and N is with thermostat temperature
Raising and increase.It is sufficiently large to be unable to satisfy W value for traditional sensors in test job, therefore causes serious leakage Thermal Error.
Technology at present, diminution sensor diameter is extremely difficult, it is therefore necessary to change the structure of sensor, to reach thermometric accurately mesh
's.
Summary of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of utilization special shape armored platinum resistance test
The method of thermostat thermal field.
To achieve the above object, the present invention adopts the following technical solutions:
A method of thermostat thermal field is tested using special shape armored platinum resistance, comprising the following steps:
The temperature of thermostat is set in lower limit temperature or ceiling temperature, by two special shape armored platinum resistance and together,
Tip is drawn close；
Two special shape armored platinum resistance are deep as fix the platinum resistance insertion shallow warm area of working region, that is, thermostat 1/2
Degree, is fixed on reference position O, at the center of 0 point of 1/2 depth for being located at the shallow warm area of thermostat in the reference position, third branch platinum electricity
Hinder the upper surface location A as the mobile platinum resistance insertion shallow warm area of thermostat；
After thermostat for the first time reach set temperature after stablize at least 10min or with thermostat operation instructions requirement when
Between, reading；
By fixed platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance → fixation platinum resistance → movement platinum
Resistance → movement platinum resistance → fixation platinum resistance measuring sequence, successively obtains indicating value
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then A point relative to the temperature indicating value difference of O point is at this time
It is kept fixed original position of platinum resistance, by the lower surface position E of the mobile platinum resistance insertion shallow warm area of thermostat；To
Two fixed platinum resistance indicating value variations are read after stablizing；
By fixed platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance → fixation platinum resistance → movement platinum
Resistance → movement platinum resistance → fixation platinum resistance measuring sequence, successively obtains indicating value:
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then E point is relative to the indicating value difference of O point
The rest may be inferred, respectively obtains B, C, D point being uniformly arranged on the upper surface of the shallow warm area of thermostat according to the method described above,
And indicating value difference R of F, G, H point relative to O point is uniformly arranged on lower surfaceB·O、RC·O、RD·O、RF·O、RG·O、RH·O；
In RA·O、RB·O、RC·O、RD·OIn find out maximum value and minimum value, the differential conversion that maximum value subtracts minimum value is temperature
The as maximum temperature difference of the shallow warm area upper surface of thermostat；
Pass through RE·O、RF·O、RG·O、RH·OIn find out maximum value and minimum value, maximum value subtracts the differential conversion of minimum value as temperature
Degree is the maximum temperature difference of the shallow warm area lower surface of thermostat；
In RA·O、RB·O、RC·O、RD·O、RE·O、RF·O、RG·O、RH·OIn find out maximum value and minimum value, maximum value subtracts most
The differential conversion of small value is the maximum temperature difference that temperature is the shallow warm area of thermostat.
A, B, C, D point of the shallow warm area upper surface of thermostat are uniformly distributed；The E of the shallow warm area lower surface of thermostat,
F, G, H point are uniformly distributed.
The special shape armored platinum resistance includes spiral proof armored platinum resistor and barb type proof armored platinum resistor.
It is spiral-shaped structure that the spiral proof armored platinum resistor, which is end section,.
It is L-type structure that the barb type proof armored platinum resistor, which is end,.
The barb type proof armored platinum resistor is suitable for bore 100mm thermostat below.
Thermostat of the spiral proof armored platinum resistor suitable for level less than 100mm, or normal thermostat
Shallow warm area measurement.
The beneficial effects of the present invention are:
It is extremely difficult due to reducing sensor diameter, so, in order to allow sensor observed temperature to be equal to temperature in thermostat,
Submergence total length W is increased as far as possible by the way of special shape armored platinum resistance, is breached national calibrating standard by the present invention
The requirement of JJF1030-2010 thermal field test has broken existing conventional understanding, has overcome technology prejudice, reached one kind more preferably
Technical effect.
The present invention uses A grades of industrial proof armored platinum resistors, cheap, sturdy durable.
Using a variety of moulding, the size of sensor submergence in a liquid is increased, the influence of leakage heat can be ignored,
Any warm area can be measured.
High temperature warm area can be measured.
Barb type is used in relatively narrow thermostat, screw type is used in shallower thermostat, is selected according to different situations
Select armouring of different shapes.
Detailed description of the invention
Fig. 1 is national calibrating standard JJF1030-2010 thermal field test schematic diagram.
Fig. 2 is that spiral proof armored platinum resistor immerses schematic diagram；
Fig. 3 is the shallow warm area test schematic diagram in spiral proof armored platinum resistor working region；
Fig. 4 is that barb type proof armored platinum resistor immerses schematic diagram；
Fig. 5 is the shallow warm area test schematic diagram of barb type proof armored platinum resistor；
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
This specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification revealed interior
Hold, so that those skilled in the art understands and reads, is not intended to limit the invention enforceable qualifications, therefore does not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size can be produced not influencing the present invention
Under raw effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, be merely convenient to
Narration is illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, without substantive change
Under technology contents, when being also considered as the enforceable scope of the present invention.
Embodiment 1:
As shown in Figure 2 and Figure 3, spiral armoured thermal resistance is as shown in Figure 2, wherein and D is submergence, and H is helical length,
S is screw pitch, and d is sensor diameter；
It is easy to get, individual pen helical length
If more spiral armourings, total helical length is made
I.e. sensor submerges total length
Obvious L > s, that is, W > D has achieved the purpose that increase sensor submergence total length.
Test method:
As shown in figure 3, being the shallow warm area of thermostat between plane ABCD and plane EFGH.The temperature of thermostat is set in down
It limits temperature (or ceiling temperature), by two spiral proof armored platinum resistors and together, tip is drawn close.Using two platinum resistance as solid
Determine platinum resistance insertion 1/2 depth of working region, be fixed on reference position O, 0 point of the reference position is located at the 1/ of the shallow warm area of thermostat
At the center of 2 depth, another platinum resistance is inserted into upper horizontal plane position A as mobile platinum resistance.Reach for the first time to thermostat
It the time stablizing at least 10min after set temperature or being required with thermostat operation instructions, can just read.By fixed platinum resistance
Gu → movement platinum resistance → movement platinum resistance → fixation platinum resistance → fixation platinum resistance → movement platinum resistance → movement platinum resistance →
The measuring sequence for determining platinum resistance, successively obtains indicating value
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then A point relative to the temperature indicating value difference of O point is at this time
It is kept fixed original position of platinum resistance, mobile platinum resistance is inserted into the lower horizontal plane position E in shallow warm area, is such as schemed
Shown in 4.It can just be read after two platinum resistance indicating value variations are stablized.By fixed platinum resistance → movement platinum resistance → movement platinum electricity
Resistance → fixation platinum resistance → fixation platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance measuring sequence, successively
Obtain indicating value:
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then E point is relative to the indicating value difference of O point
A, B, C, D point of the shallow warm area upper surface of thermostat are uniformly distributed；E, F, G, H point of the shallow warm area lower surface of thermostat are equal
Even distribution.
The rest may be inferred, can respectively obtain in working region B, C, D, E, F, G and H point according to the method described above relative to O point
Indicating value difference RB·O、RC·O、RD·O、RF·O、RG·O、RH·O。
Numerical value calculates
In RA·O、RB·O、RC·O、RD·OIn find out maximum value and minimum value, the differential conversion that maximum value subtracts minimum value is temperature
The as maximum temperature difference of working region upper horizontal plane.
The rest may be inferred, passes through RE·O、RF·O、RG·O、RH·OThe maximum temperature difference of available working region lower horizontal plane.
In RA·O、RB·O、RC·O、RD·O、RE·O、RF·O、RG·O、RH·OIn find out maximum value and minimum value, maximum value subtracts most
The differential conversion of small value is the maximum temperature difference that temperature is working region.
Embodiment 2:
As shown in figure 4, barb type armoured thermal resistance, be easy to get W=D+H > D
Test method:
As shown in figure 5, being the shallow warm area of thermostat between plane ABCD and plane EFGH.This vallecular cavity bore is relatively narrow.It will be permanent
The temperature of warm slot is set in lower limit temperature (or ceiling temperature), by two fluking type proof armored platinum resistors and together, barb tip
Alignment is drawn close, 1/2 depth of working region is inserted into as fixed platinum resistance, is fixed on reference position O, another platinum resistance is as shifting
Dynamic platinum resistance is inserted into upper horizontal plane position A.Stablize at least 10min or and thermostat after thermostat reaches set temperature for the first time
It the time that operation instructions require, can just read.By fixed platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum
Resistance → fixation platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance measuring sequence, successively obtains indicating value
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then A point relative to the temperature indicating value difference of O point is at this time
It is kept fixed original position of platinum resistance, by the shallow warm area lower horizontal plane position in mobile platinum resistance insertion working region
E is set, as shown in Figure 4.It can just be read after two platinum resistance indicating value variations are stablized.By fixed platinum resistance → movement platinum resistance →
Mobile platinum resistance → fixation platinum resistance → fixation platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance measurement
Sequentially, indicating value is successively obtained:
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then E point is relative to the indicating value difference of O point
A, B, C, D point of the shallow warm area upper surface of thermostat are uniformly distributed；E, F, G, H point of the shallow warm area lower surface of thermostat are equal
Even distribution.
The rest may be inferred, can respectively obtain in working region B, C, D, E, F, G and H point according to the method described above relative to O point
Indicating value difference RB·O、RC·O、RD·O、RF·O、RG·O、RH·O。
Numerical value calculates
In RA·O、RB·O、RC·O、RD·OIn find out maximum value and minimum value, the differential conversion that maximum value subtracts minimum value is temperature
The as maximum temperature difference of working region upper horizontal plane.
The rest may be inferred, passes through RE·O、RF·O、RG·O、RH·OThe maximum temperature difference of available working region lower horizontal plane.
In RA·O、RB·O、RC·O、RD·O、RE·O、RF·O、RG·O、RH·OIn find out maximum value and minimum value, maximum value subtracts most
The differential conversion of small value is the maximum temperature difference that temperature is working region.
It should be noted that barb type proof armored platinum resistor is in the bottom Shi Youyi fixed limit for measuring entire thermostat working region
System, the thermal field within the H height of bottom can not be measured.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of method using special shape armored platinum resistance test thermostat thermal field, characterized in that the following steps are included:
1) temperature of thermostat is set in lower limit temperature or ceiling temperature, by two special shape armored platinum resistance and together, end
The tip is drawn close；
2) 1/2 depth of the shallow warm area of working region, that is, thermostat is inserted into using two special shape armored platinum resistance as fixed platinum resistance,
It is fixed on reference position O, upper surface location A of the third branch platinum resistance as the mobile platinum resistance insertion shallow warm area of thermostat；
3) after thermostat for the first time reach set temperature after stablize at least 10min or with thermostat operation instructions requirement when
Between, it reads and to calculate A point poor relative to the temperature indicating value of O point；
4) it is kept fixed original position of platinum resistance, by the lower surface position E of the mobile platinum resistance insertion shallow warm area of thermostat；To two
The fixed platinum resistance indicating value variation of branch is read after stablizing, and it is poor relative to the indicating value of O point to calculate E point；
5) the rest may be inferred, respectively obtains B, C, D point being uniformly arranged on the shallow warm area upper surface of thermostat according to the method described above, and
The indicating value that F, G, H point are uniformly arranged on lower surface relative to O point is poor；
6) A, B, C, D point are relative to maximum value and minimum value is found out in the indicating value difference of O point on the shallow warm area upper surface of thermostat, most
It is the maximum temperature difference that temperature is the shallow warm area upper surface of thermostat that value, which subtracts the differential conversion of minimum value, greatly；
7) E, F, G, H point are relative to maximum value and minimum value is found out in the indicating value difference of O point on the shallow warm area lower surface of thermostat, most
It is the maximum temperature difference that temperature is the shallow warm area lower surface of thermostat that value, which subtracts the differential conversion of minimum value, greatly；
8) maximum value and minimum value are found out in indicating value difference of all points of the shallow warm area upper and lower surfaces of thermostat relative to O point,
Maximum value subtract minimum value differential conversion be temperature be the shallow warm area of thermostat maximum temperature difference.
2. utilizing the method for special shape armored platinum resistance test thermostat thermal field as described in claim 1, characterized in that step 3)
Middle reading and to calculate A point poor relative to the temperature indicating value of O point, specific as follows:
By fixed platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance → fixation platinum resistance → movement platinum resistance
The measuring sequence of → movement platinum resistance → fixation platinum resistance, successively obtains indicating value
RA1、RA2、RA3、RA4、
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then A point relative to the temperature indicating value difference of O point is at this time
3. utilizing the method for special shape armored platinum resistance test thermostat thermal field as described in claim 1, characterized in that step 4)
Middle reading and to calculate A point poor relative to the temperature indicating value of O point, specific as follows:
By fixed platinum resistance → movement platinum resistance → movement platinum resistance → fixation platinum resistance → fixation platinum resistance → movement platinum resistance
The measuring sequence of → movement platinum resistance → fixation platinum resistance, successively obtains indicating value:
RE1、RE2、RE3、RE4、
Wherein,For the average value of two fixed platinum resistance indicating values
Calculate fixed platinum resistance indicating value average value:
Calculate mobile platinum resistance indicating value average value:
Then E point is relative to the indicating value difference of O point
4. utilizing the method for special shape armored platinum resistance test thermostat thermal field as described in claim 1, characterized in that the ginseng
At the center for examining 0 point of 1/2 depth for being located at the shallow warm area of thermostat in position.
5. utilizing the method for special shape armored platinum resistance test thermostat thermal field as described in claim 1, characterized in that the perseverance
A, B, C, D point of the warm shallow warm area upper surface of slot are uniformly distributed；E, F, G, H point of the shallow warm area lower surface of thermostat are uniformly minute
Cloth.
6. utilizing the method for special shape armored platinum resistance test thermostat thermal field as described in claim 1, characterized in that described different
Shape proof armored platinum resistor includes spiral proof armored platinum resistor and barb type proof armored platinum resistor.
7. utilizing the method for special shape armored platinum resistance test thermostat thermal field as claimed in claim 6, characterized in that the spiral shell
Rotating proof armored platinum resistor is that end section is spiral-shaped structure.
8. as claimed in claim 6 using special shape armored platinum resistance test thermostat thermal field method, characterized in that it is described fall
Hook proof armored platinum resistor is that end is L-type structure.
9. as claimed in claim 8 using special shape armored platinum resistance test thermostat thermal field method, characterized in that it is described fall
Hook proof armored platinum resistor is suitable for bore 100mm thermostat below.
10. utilizing the method for special shape armored platinum resistance test thermostat thermal field as claimed in claim 7, characterized in that described
Spiral proof armored platinum resistor is suitable for the thermostat that level is less than 100mm, or the shallow warm area measurement of normal thermostat.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795884A (en) * | 1987-10-23 | 1989-01-03 | The United States Of America As Represented By The United States Department Of Energy | Method for in-situ restoration of plantinum resistance thermometer calibration |
| CN202938916U (en) * | 2012-11-27 | 2013-05-15 | 武汉钢铁(集团)公司 | Performance testing device for constant temperature bath |
| CN203616022U (en) * | 2013-12-04 | 2014-05-28 | 中国直升机设计研究所 | Clamp for testing temperature field of thermostatic bath |
| CN204188296U (en) * | 2014-11-11 | 2015-03-04 | 安徽蓝德仪表有限公司 | A kind of thermometric armoured thermal resistance |
-
2019
- 2019-05-28 CN CN201910451864.8A patent/CN110095199A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795884A (en) * | 1987-10-23 | 1989-01-03 | The United States Of America As Represented By The United States Department Of Energy | Method for in-situ restoration of plantinum resistance thermometer calibration |
| CN202938916U (en) * | 2012-11-27 | 2013-05-15 | 武汉钢铁(集团)公司 | Performance testing device for constant temperature bath |
| CN203616022U (en) * | 2013-12-04 | 2014-05-28 | 中国直升机设计研究所 | Clamp for testing temperature field of thermostatic bath |
| CN204188296U (en) * | 2014-11-11 | 2015-03-04 | 安徽蓝德仪表有限公司 | A kind of thermometric armoured thermal resistance |
Non-Patent Citations (1)
| Title |
|---|
| 林品云: "恒温槽自动校准装置的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Application publication date: 20190806 |