CN106054978A - Product temperature control system and method in case of atmospheric pressure high and low temperature test - Google Patents
Product temperature control system and method in case of atmospheric pressure high and low temperature test Download PDFInfo
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- CN106054978A CN106054978A CN201610571268.XA CN201610571268A CN106054978A CN 106054978 A CN106054978 A CN 106054978A CN 201610571268 A CN201610571268 A CN 201610571268A CN 106054978 A CN106054978 A CN 106054978A
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- temperature
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
Abstract
The invention discloses a product temperature control system in the case of an atmospheric pressure high and low temperature test for precise temperature control on test product temperature distribution. The temperature control system comprises an environment simulation box, heating sheets, a platinum resistor, a heat insulation assembly, a data acquisition and control device, and a power supply, wherein the environment simulation box is used for providing an environment temperature meeting requirements for the test product and simultaneously avoiding influences from condensed water; multiple heating sheets are in serial and parallel connection to form a heating loop, and after power supply, heat is provided for an end frame flange; the platinum resistor is used for measuring the temperature value of a corresponding area of the end frame flange; the heat insulation assembly is used for reducing heat leakage to an environment at a low temperature by the test product, improving the heat utilization rate of the heating loop and reducing influences from the heat of the heating sheets to an external environment; the data acquisition and control device acquires the temperature value of the platinum resistor, compares and judges the temperature measurement value with a set temperature threshold for controlling on and off of the temperature control loop and on and off of power of the heating sheets; and a programmable power supply provides power for the heating sheets according to an instruction of the data acquisition and control device.
Description
Technical field
The present invention relates to product temperature control problem during the test of atmospheric high-low temperature, be specifically related to a kind of atmospheric high-low temperature test
The temperature control system that the distribution of Shi Shixian structure temperature accurately controls.
Background technology
At space industry, aircraft have to be right through the checking of sufficient ground experiment and examination before formal transmitting
In large scale structure and the docking of mechanism, separate, launch and the key operations such as convergence, the most at normal temperatures and pressures to above-mentioned pass
Key action carries out the ground experiment of function and performance, carries out the ground interview of thermo-environment adaptability further under high and low temperature environment
Testing, during current thermocycling, product is in same high temperature or low temperature state more.Reality in orbit time, large scale structure and mechanism
Affected by space heat flux, the bigger temperature difference between diverse location, can be there is, along with the development of aerospace industry, large scale structure and
Mechanism's application on board the aircraft is more and more extensive, and key is moved by the brought structure of the big temperature difference, the thermal deformation of mechanism and thermal stress
The impact made causes the concern of designer day by day, except opening up outside sufficient simulation analysis, is highly desirable to realizing structure
Carry out high/low temperature under big temperature difference state, particularly atmospheric high-low temperature ground experiment, to the holding function of structure and mechanism's product and
Performance carries out more efficiently examination.Product is generally placed in environmental chamber by atmospheric high-low temperature test at present, is passed through phase
Answering the nitrogen of temperature, and environment in case and product temperature are uniformly controlled in requiring temperature range, product diverse location is not deposited
In the bigger temperature difference.Some pilot systems are the temperature contrast realizing product local, arrange air supply duct near corresponding site again,
Send into different temperatures nitrogen, directly blow to product local location, but the nitrogen sending into different temperatures in this system can affect in case
Ambient temperature conditions, and local blowing ratio mode is difficult to regulation region is carried out effective temperature control, particularly realizes multiple
The different temperatures in region controls, and needs to arrange many air-supply pipelines, and system is the most complicated, and the nitrogen of different temperatures between each district
Gas can influence each other, and is difficulty with the accurate control of temperature.
Summary of the invention
For the deficiencies in the prior art, in order to realize large scale structure and mechanism under there is temperature profiling conditions, often carry out
Pressure thermocycling, promotes the adaptation ability of existing pilot system, realizes when the invention provides a kind of atmospheric high-low temperature test
The temperature control system that structure temperature distribution accurately controls.
Product temperature control system when one aspect of the present invention is a kind of atmospheric high-low temperature test, for test products Temperature Distribution
Temperature accurately control, described temperature control system includes:
Environmental chamber, according to test products size and action envelope scope, and test temperature demand, selected corresponding size and
Meet the height environmental chamber of high/low temperature environmental simulation requirement, by sending into and discharge the nitrogen of different temperatures, it is achieved environment
Nitrogen displacement and the control of ambient temperature in simulation box；
Heating circuit/heating plate, heating plate is pasted onto in the region that product structure surface specifies, by the connection in series-parallel relation of circuit
Being unified into heating circuit, energising provides heat, meets respective regions temperature increase requirement；
Platinum resistance, is pasted onto on the position that product structure surface respective regions specifies, for the measurement of structure respective regions temperature；
Insulating assembly, is coated on the structural outer surface needing temperature control, nitrogen and product surface in reducing environmental chamber
Heat exchange, thus reduce the product leakage heat to environment, if body structure surface needs sticking heating plates, first sticking heating plates, then it is coated with heat insulation
Assembly, insulating assembly can reduce the impact on environment of the heating plate heat simultaneously；
Temperature acquisition and control device, be connected with described heating circuit and described platinum resistance, described data acquisition and control device
Gather the temperature value of described platinum resistance, temperature value and the temperature threshold of setting are carried out judgement and powers to control described heating circuit
Break-make；
Power supply, according to temperature acquisition and the control instruction of control device, powers for heating circuit.
In some embodiments, described heating circuit/heating plate, it is pasted onto on test products respective regions surface, according to district
The heating plate of the profile arrangement in territory, can realize sticking area and strictly control, thus can realize accurately controlling to heating region
System.
In some embodiments, described heating plate uses polyimides constantan paper tinsel electric heating sheets.
In some embodiments, described platinum resistance uses Pt100 type platinum resistance.
In some embodiments, described insulating assembly uses the multilayer insulation material that some unit are sequentially overlapped.
In some embodiments, each unit of described multilayer material includes one layer of two-sided aluminized mylar and one layer of chinlon
Net.
In some embodiments, power supply uses 150V/5A program-control DC power.
Product temp. control method when another aspect of the present invention is a kind of atmospheric high-low temperature test, uses temperature control system as above
System, is provided basal temperature minimum in test products Temperature Distribution, the temperature of test products local zones of different by environmental chamber
Rise and realized by the heating circuit being pasted onto respective regions, heating circuit, thermometric platinum resistance, data acquisition and control device simultaneously
The Cryocooler Temperature Closed Loop Control System constituted, it is ensured that the accurate control of local temperature, product temperature control during the test of described atmospheric high-low temperature
Method comprises the following steps:
Test products is placed in the environmental chamber, after closing chamber door, first with nitrogen, the air in case is replaced,
Avoid water vapor in air to condense into water, product is impacted, subsequently ambient temperature in environmental chamber is controlled to test
In product temperature distribution below minimum temperature；
Ambient temperature is in the temperature changing process required in the environmental chamber, the platinum electricity that test products respective regions is arranged
Hindering the temperature to corresponding region to measure, the data acquistion and control system being arranged on outside environmental chamber gathers platinum resistance
Metrical information, and show on screen with the form of temperature；
After described data acquistion and control system gathers the temperature value in platinum resistance, the temperature threshold of temperature value with setting is carried out
Judge, use PID control method to control the unlatching/closedown of connected power supply；
The heating circuit being arranged in test products, according to the power supply state of power supply, provides phase for test products setting regions
The heat answered, the heat-barrier material being coated on test products outer surface has less heat conductivity, it is possible to reduce test products to
The leakage heat of lower temperature environments, it is provided that the utilization rate of heating circuit heat, reduces the impact of heating plate heat environment to external world.
Further, ambient temperature in environmental chamber is controlled in test products Temperature Distribution minimum by described step 1)
Below temperature 5 ~ 10 DEG C.
Preferably, in described test products heating plate, platinum resistance, power supply, data acquistion and control system to test
Product respective regions temperature constitutes closed loop control.
Due to the fact that the above technical scheme of employing, be allowed to compared with prior art, have the following advantages that and actively imitate
Really: the present invention uses environmental chamber to provide basis low temperature, and local arranges heating circuit provides heat to meet local temperature rise's requirement
Temperature control thinking, test products temperature controlled zone outer surface cladding heat-barrier material, be greatly reduced test products and the phase of environment in case
Impact mutually, this measure i.e. decreases the leakage heat of test products, and the heating plate heat in test products is to ambient temperature almost simultaneously
Not impact.In test products, heating plate sticking area can strictly control, then the heating region of test products can realize essence
Really control.In test products, heating plate, platinum resistance, power supply, data acquistion and control system are to test products respective regions
Temperature constitutes closed loop control, then in test products, the temperature of respective regions can realize accurately controlling.
Accompanying drawing explanation
In conjunction with accompanying drawing, as a example by the section high/low temperature separation test temperature control system of aircraft cabin, by detailed description below, can
It is more clearly understood that the above-mentioned and other feature and advantage of the present invention, wherein:
The composition schematic diagram of the temperature control system of the atmospheric high-low temperature separation test that Fig. 1 provides for the present invention；
Fig. 2 is parting surface end frame heating plate and multilayer insulation material enforcement schematic diagram；
Fig. 3 is parting surface end frame heating plate and platinum resistance schematic layout pattern (end frame is partially schematic, and end frame is divided into 8 regions).
Detailed description of the invention
See the accompanying drawing illustrating the embodiment of the present invention, the present invention is described in more detail.But, the present invention can be with
Many multi-forms realize, and should not be construed as the embodiment by herein proposing and limited.On the contrary, proposing these embodiments is
In order to reach fully and complete disclosure, and those skilled in the art are made to understand the scope of the present invention completely.These are attached
In figure, for clarity sake, may be exaggerated layer and the size in region and relative size.
Symbol description in figure: 1-environmental chamber, 2-heating circuit cable, 3-thermometric platinum resistance cable, 4-data acquisition
With control device, 5-power supply, 6-heating plate, 7-multilayer insulation material, 8-platinum resistance, 9-heating plate goes between, 10-platinum electricity
Resistance lead-in wire, nacelle under A-aircraft, nacelle on B-aircraft, C-parting surface, D-parking leg, nacelle upper end frame under E-, on F-
Nacelle lower end frame
With reference to Fig. 1-Fig. 3, product temperature control system when the invention provides a kind of atmospheric high-low temperature test, for test products temperature
The accurate control of degree distribution, this temperature control system includes environmental chamber 1, heating circuit (connection in series-parallel of multiple heating plate 5 forms), platinum
Resistance 7, multilayer insulation material 6 and data acquisition and control device 4.
Concrete, 2 cabin sections of aircraft are connected by the form of end frame flange, and flange circumference is evenly arranged multiple priming system
Junction point, is detonated by priming system and realizes the separation of cabin section, and flange is different due to residing spatial heat environment, and circumference can exist bigger
The temperature difference, thermal deformation that the temperature difference is brought and thermal stress, priming system action can be affected thus affect cabin section and separate, it is therefore desirable to realize
The control of end frame flange circumference Temperature Distribution.
In the present embodiment, according to size and temperature control requirement, selected environment simulation box 1, the ring of cabin section separation product
Border simulation box 1 is by sending into and discharge the nitrogen of different temperatures, it is achieved nitrogen displacement and the control of ambient temperature in environmental chamber
System.Under corresponding operating mode, the ambient temperature of environmental chamber 1 is controlled as minimum temperature in region more each than product low 5 ~ 10 DEG C.
In the present embodiment, (computational analysis is passed through at lower nacelle upper end frame E and upper nacelle lower end frame F circumference respective regions
Profiling temperatures carry out region division) surface mount heating plate 5, wherein descend nacelle upper end frame E to be pasted onto lower surface, upper-deck cabin
Body lower end frame F is pasted onto upper surface, and multiple heating plates in each region form the heating circuit of respective regions, heating by connection in series-parallel
After loop/heating plate 5 energising, the end frame flange for respective regions provides heat, it is achieved the temperature of respective regions flange controls mesh
Mark.Heating plate 5 uses polyimides constantan paper tinsel electric heating sheets, and certain heating plate may be used without the heating plate of other forms, can root
Depending on concrete condition, it is not restricted.2 cabin section docking of aircraft, after on parting surface, product is installed, lead to heating plate 5
Crossing GD414 silicone rubber to be pasted onto on the surface of end frame flange respective regions, certain heating plate 5 also can be pasted by other forms
On the shell of separating mechanism, it is not restricted.According to sticking area shape, size during heating plate design, do not affecting other
On the basis of product is installed, make heating plate cover whole heating region as far as possible, and avoid hole as far as possible.Heating plate resistance simultaneously
Design to match with power supply, and the most as far as possible with the heating power of foot power supply, such as power supply is the power supply of 150V/5A, adds
The design as far as possible of the resistance of hot loop, at about 30 Ω, according to the connection in series-parallel relation of heating plates multiple in loop, determines each heating
The resistance of sheet.
In the present embodiment, thermometric platinum resistance selects Pt100 type platinum resistance, and this platinum resistance can be-200 DEG C ~ 100 DEG C temperature
In the range of reliably use, be adapted to cabin section separating high-temp operating mode and worst cold case test temperature requirement.Certainly thermometric platinum electricity
The platinum resistance that resistance 7 also may select other forms, can as the case may be depending on, be not restricted.2 cabin sections of aircraft are right
Connect, after product is installed on parting surface, thermometric platinum resistance 7 is pasted onto the end corresponding temperature controlled zone of frame flange by GD414 silicone rubber
Center on, thermometric platinum resistance 7 realizes the measurement to temperature controlled zone temperature value, the position of certain thermometric platinum resistance 7 and
Bonding way also can be realized by other forms, can as the case may be depending on, be not restricted.
In the present embodiment, environmental chamber 1 is outside is provided with data acquisition and control device 4 and power supply 5, data
Gather and be connected with platinum resistance lead-in wire 10 by platinum resistance cable 3 with control device 4, data acquisition and control device 4, power supply
5 and heating circuit form temperature control loop by heating circuit cable 2 series connection, data acquisition and control device gathers platinum resistance 8
Temperature value, judges the temperature threshold of the temperature value collected with setting, if the temperature value gathered is less than temperature threshold
Lower limit, then connect temperature control loop, heating plate 5 electrified regulation, if the temperature value gathered is higher than the upper limit of temperature threshold, then disconnect control
Temperature loops, heating plate 5 power-off stops heating；Wherein, temperature threshold sets according to the temperature requirement of each temperature controlled zone, usual threshold value
Scope is [required value-1 DEG C, it is desirable to be worth+1 DEG C], is not restricted.
In the present embodiment, insulating assembly 7 is the multilayer insulation assembly that some unit are sequentially overlapped, concrete insulating assembly
1 uses the multilayer material of Unit 30 to be formed by stacking, the multilayer material of each unit include one layer of 6 two-sided aluminized mylar of μm and
One layer of chinlon net, certain insulating assembly 7 material can as the case may be depending on, the most only for citing, be not restricted.Insulating assembly
On 7 surfaces being coated on framework flange sticking heating plates, insulating assembly 7 can reduce the test products leakage to lower temperature environments
Heat, it is provided that the utilization rate of heating circuit heat, reduces the impact of heating plate heat environment to external world.
Realize under the conditions of present invention also offers a kind of atmospheric high-low temperature structure temperature distribution temperature control system, have employed as
Upper described temperature regulating device, specifically comprises the following steps that
1) test products being placed in the environmental chamber, environmental chamber realizes under different operating mode minimum less than each region of product
The ambient temperature requiring temperature controls.
2) heating plate is installed on framework flange respective regions, and the multiple heating plates in region are formed by connection in series-parallel
Heating circuit, heating circuit provides heat for framework flange after powering；
3) platinum resistance, the described platinum resistance temperature to respective regions framework flange are installed on framework flange respective regions center
Angle value measures；
4) arranging data acquisition and control device, power supply outside environmental chamber, this data acquisition and control device is adopted
After the temperature value of collection platinum resistance, the temperature threshold of temperature value with setting is judged, if the temperature value gathered is less than temperature threshold
The lower limit of value, then temperature control loop is connected, heating plate electrified regulation, if the temperature value gathered is higher than the upper limit of temperature threshold, then controls
Temperature loops disconnects, and heating plate power-off stops heating；
5) at the heating plate adhesive surface outer cladding insulating assembly of framework flange, the test products leakage to lower temperature environments is reduced
Heat, it is provided that the utilization rate of heating circuit heat, reduces the impact of heating plate heat environment to external world；
In sum, product temperature control system when the invention provides a kind of atmospheric high-low temperature test, for test products temperature
Distribution temperature accurately control, this temperature control system include environmental chamber, heating plate, platinum resistance, insulating assembly, data acquisition and
Control device, and power supply.Environmental chamber provides for test products and meets the ambient temperature required, avoids condensation simultaneously
The impact of water；Multiple heating plate connection in series-parallel form heating circuit, provide heat for end frame flange after power supply；Platinum resistance realizes end frame
Flange respective regions temperature value is measured；Insulating assembly is for reducing the test products leakage heat to lower temperature environments, it is provided that heating
The utilization rate of loop heat, reduces the impact of heating plate heat environment to external world；Data acquisition and control device gathers platinum resistance
Temperature value, and the temperature threshold of measured temperature Yu setting is compared judgement, control the break-make in temperature control loop, heating plate
The break-make of power supply；Programmable power supply is powered for heating plate according to the instruction of data acquisition and control device.The present invention can realize
In test products, heating plate sticking area can strictly control, then the heating region of test products can realize accurately controlling.Examination
Test heating plate on product, platinum resistance, power supply, data acquistion and control system to test products respective regions temperature constitute close
Ring controls, then in test products, the temperature of respective regions can realize accurately controlling.The present invention is provided by high/low temperature environmental simulation case
Basis low temperature, heating circuit/heating plate coordinates corresponding high power power supply to provide enough heats, test to produce for test products
Product temperature controlled zone outer surface cladding heat-barrier material, is greatly reduced test products and the influencing each other of environment in case, then can realize trying
The temperature testing the big temperature difference of product controls.
Those skilled in the art should be understood that the present invention can be implemented without departing from this with other concrete forms many
The spirit or scope of invention.Although also have been described embodiments of the invention, it should be understood that the present invention should not be limited to these and implements
Example, the spirit that those skilled in the art can define such as appended claims and within the scope of make change and repair
Change.
Claims (9)
1. the product temperature control system during test of atmospheric high-low temperature, realizes structure temperature distribution when atmospheric high-low temperature is tested
Accurate control, it is characterised in that including:
Environmental chamber, by sending into and discharge the nitrogen of different temperatures, it is achieved nitrogen displaced air and ring in environmental chamber
The control of border temperature；
Heating circuit/heating plate, is pasted onto the heating plate in the region that product structure surface specifies, is closed by the connection in series-parallel of circuit
System is unified into heating circuit, and energising provides heat, meets respective regions temperature increase requirement；
Platinum resistance, is pasted onto on the position that product structure surface respective regions specifies, for the measurement of structure respective regions temperature；
Insulating assembly, is coated on the structural outer surface needing temperature control, nitrogen and product surface in reducing environmental chamber
Heat exchange；
Temperature acquisition and control device, be connected with described heating circuit and described platinum resistance, described temperature acquisition and control device
Gather the temperature value of described platinum resistance, temperature value and the temperature threshold of setting are carried out judgement and powers to control described heating circuit
Break-make；
Power supply, according to temperature acquisition and the control instruction of control device, powers for heating circuit.
Product temperature control system during atmospheric high-low temperature the most according to claim 1 test, it is characterised in that described heating
Loop/heating plate, is pasted onto on test products respective regions surface, according to the heating plate of the profile arrangement in region, and can be real
Existing sticking area strictly controls, thus can realize accurately controlling to heating region.
Product temperature control system during atmospheric high-low temperature the most according to claim 1 test, it is characterised in that described heating
Sheet uses polyimides constantan paper tinsel electric heating sheets.
Product temperature control system during atmospheric high-low temperature the most according to claim 1 test, it is characterised in that described platinum electricity
Resistance uses Pt100 type platinum resistance.
Product temperature control system during atmospheric high-low temperature the most according to claim 1 test, it is characterised in that described heat insulation
Assembly uses the multilayer insulation assembly that some unit are sequentially overlapped.
Test products temperature control system the most according to claim 5, it is characterised in that each list of described multilayer module
Unit includes one layer of two-sided aluminized mylar and one layer of chinlon net.
The control method of product temperature control system during atmospheric high-low temperature the most according to claim 1 test, its feature exists
In, comprise the following steps:
1) test products is placed in the environmental chamber, after closing chamber door, first with nitrogen, the air in case is put
Change, subsequently ambient temperature in environmental chamber is controlled in test products Temperature Distribution below minimum temperature；
2) in the environmental chamber ambient temperature in the temperature changing process required, on test products respective regions arrange platinum
The temperature of corresponding region is measured by resistance, and the data acquistion and control system being arranged on outside environmental chamber gathers platinum resistance
Metrical information, and show on screen with the form of temperature；
3), after described data acquistion and control system gathers the temperature value in platinum resistance, the temperature threshold of temperature value with setting is entered
Row judges, uses PID control method, controls the unlatching/closedown of connected power supply；
4) heating circuit being arranged in test products is according to the power supply state of power supply, provides for test products setting regions
Corresponding heat, the heat-barrier material being coated on test products outer surface has less heat conductivity.
Product temperature control method during atmospheric high-low temperature the most according to claim 7 test, it is characterised in that described step
1) in, ambient temperature in environmental chamber is controlled in test products Temperature Distribution below minimum temperature 5 ~ 10 DEG C.
Product temperature control method during atmospheric high-low temperature the most according to claim 7 test, it is characterised in that described test
On product, heating plate, platinum resistance, power supply, data acquistion and control system constitute closed loop to test products respective regions temperature
Control.
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| CN201610571268.XA CN106054978B (en) | 2016-07-20 | 2016-07-20 | Product temperature control system and method during a kind of atmospheric high-low temperature experiment |
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| CN106568664A (en) * | 2016-11-18 | 2017-04-19 | 上海宇航系统工程研究所 | Spacecraft high/low temperature separation testing system and method |
| CN108106484A (en) * | 2018-01-30 | 2018-06-01 | 中国科学院理化技术研究所 | A kind of device and method for preventing cryogenic heat exchanger frozen plug |
| CN109696587A (en) * | 2017-10-23 | 2019-04-30 | 中国科学院空间应用工程与技术中心 | A kind of system and method for space station scientific experiment cupboards progress simulation test |
| CN110514120A (en) * | 2019-08-26 | 2019-11-29 | 北京卫星环境工程研究所 | Displacement measurement system for vacuum low-temperature environment |
| CN112051069A (en) * | 2019-06-05 | 2020-12-08 | 中国航发商用航空发动机有限责任公司 | Gas turbine test bench and thermal stress resistant flange device thereof |
| CN113843931A (en) * | 2021-09-17 | 2021-12-28 | 西南技术物理研究所 | GD414C silicon rubber resistivity changing method |
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| CN109696587A (en) * | 2017-10-23 | 2019-04-30 | 中国科学院空间应用工程与技术中心 | A kind of system and method for space station scientific experiment cupboards progress simulation test |
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| CN108106484A (en) * | 2018-01-30 | 2018-06-01 | 中国科学院理化技术研究所 | A kind of device and method for preventing cryogenic heat exchanger frozen plug |
| CN112051069A (en) * | 2019-06-05 | 2020-12-08 | 中国航发商用航空发动机有限责任公司 | Gas turbine test bench and thermal stress resistant flange device thereof |
| CN110514120A (en) * | 2019-08-26 | 2019-11-29 | 北京卫星环境工程研究所 | Displacement measurement system for vacuum low-temperature environment |
| CN113843931A (en) * | 2021-09-17 | 2021-12-28 | 西南技术物理研究所 | GD414C silicon rubber resistivity changing method |
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| Publication number | Publication date |
|---|---|
| CN106054978B (en) | 2018-07-03 |
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