CN108106746B - The temperature of continuous wind tunnel cooling system measures and data collection system - Google Patents
The temperature of continuous wind tunnel cooling system measures and data collection system Download PDFInfo
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- CN108106746B CN108106746B CN201711272351.8A CN201711272351A CN108106746B CN 108106746 B CN108106746 B CN 108106746B CN 201711272351 A CN201711272351 A CN 201711272351A CN 108106746 B CN108106746 B CN 108106746B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Abstract
A kind of the temperature measurement and data collection system of continuous wind tunnel cooling system, measure the numerical value of the multiple temperature control points of continuous wind tunnel cooling system respectively by armouring integral temperature transmitter, patch type temperature sensor plus temperature transmitter and thermocouple total temperature framed bent, and signal analysis and processing is carried out by data acquisition controller after being acquired respectively to temperature transmitter signal and thermocouple signal by analogue collection module, Thermocouple module, wherein temperature control target of the total temperature framed bent electric thermo-couple temperature as cooling control system.Cooling control system is simultaneously monitored the temperature signal of other temperature control points, and so as to test data analyzer, and the signal that will affect wind-tunnel and equipment safety is included in safety interlocking monitoring, by all temperature data uploadings to wind-tunnel core controller.The present invention has the characteristics of measuring accuracy is higher, response is fast, can guarantee the uniformity that total temperature is tested, and can detect to key node.
Description
Technical field
The invention belongs to wind tunnel test technical field, the temperature measurement of specifically a kind of continuous wind tunnel cooling system and number
According to acquisition system.
Background technique
A kind of way of realization of continuous wind tunnel cooling system be by the refrigerants such as spray liquid nitrogen/liquefied ammonia into wind-tunnel,
The cooling operation of wind-tunnel is realized using its gasification latent heat.By taking hydrojet nitrogen as an example, cooling system is by liquid nitrogen storage tank, pump, distributing valve
Group, crowded valve group, feed flow valve group, collection pendular ring and the associated pipe of pushing away form, and wherein liquid nitrogen container is used for the storage of liquid nitrogen；Liquid nitrogen pump and
Driving gas source and Air control valve of the gasifier for liquid nitrogen to be converted to gas nitrogen and is stored in gas cylinders group, as crowded propulsive liquid nitrogen
Drive gas source；High-low pressure required for being adjusted to the gas source of gas cylinders group by distribution platform drives gas；On liquid nitrogen feeding pipe
Feed flow valve group, for controlling cleaning, pre-cooling, filling and the conveying of liquid nitrogen pipeline；Collection pendular ring is for installing liquid nitrogen spray solenoid valve
And nozzle, while being filled for liquid nitrogen.It prepares pipeline in liquid nitrogen conveying and gas nitrogen, collect pendular ring, liquid nitrogen spray section, hole body circuit
Many places configure corresponding temperature sensor/transmitter implementing monitoring, configure total temperature framed bent in wind-tunnel stable section, and with warm on framed bent
Measuring point value of feedback, which is spent, as wind-tunnel total temperature control target implements cooling control.Compared to common continuous wind tunnel, cooling system is configured
Continuous wind tunnel have different requirements to the point position of temperature, the precision of test and rapidity and uniformity.
The measurement of the temperature of conventional continuous wind tunnel or wind-tunnel section and data collection system also use temperature sensor/pick-up
Device realizes data collection and analysis by data collection system to carry out temperature measurement, and measuring accuracy is higher, but can not be complete
Full up foot cooling system demand, is mainly manifested in the following aspects:
First is that cooling system is higher to the index request of temperature measuring equipment, it is to be surveyed to the rapidity and temperature of temperature-responsive first
The accuracy requirement of amount is higher.The runing time that cools down is shorter, and liquid nitrogen consumption is larger, while spraying liquid nitrogen cooling with biggish
Risk, for example liquid nitrogen gasifies not in time will lead to that hole body local temperature is too low to cause equipment damage, it is therefore necessary to ensure that temperature is surveyed
That puts is quick, accurate, to reduce liquid nitrogen consumption, and reduces the cold operation risk of wind-tunnel.
Second is that cooling system is more demanding to the uniformity index of stable section gas flow temperature field, stable section gas flow temperature conduct
The control target of cooling system, if can not accurately characterize the equal of gas flow temperature according to conventional wind-tunnel temperature point layout method
Even property.Therefore, it is necessary to meet uniformly to install temperature point every shorter distance on flow area in stable section total temperature framed bent, and
It is required that the precision height of the temperature measuring equipment, fast response time, consistency are good.
Third is that cooling system is more demanding to the intensity and temperature-measuring range of temperature measurement equipment, inhaled using injection liquid nitrogen vaporization
When the cooling method of heat, the temperature of liquid nitrogen is lower, can reach -198 DEG C, and low-temperature lower portion divides material to be easy embrittlement, in addition wind-tunnel
It is also equipped with conventional and other operating condition service abilities such as is pressurized except cooling operation is outer, wind-tunnel inner part under High Mach number when conventional operation
The gas flow temperature of position is higher, and temperature measuring equipment needs to be fixed on for a long time after being installed on wind tunnel body, to be subjected to high temperature
To the repetitive process of low temperature, normal pressure to pressurization, therefore have higher requirements to the material, intensity and temperature-measuring range of temperature measuring equipment.
Fourth is that cooling system has particular/special requirement to the position of temperature point.Conventional wind-tunnel temp measuring system is not to fluid-N2 spraying section
The temperature of hole wall, liquid nitrogen favorable current are supervised along journey primary focus, such as the temperature of liquid nitrogen transfer pipeline, wind-tunnel heat exchanger section
It surveys, and the accurate measurement of above-mentioned measuring point temperature plays a significant role the smooth implementation of cooling system.
The temperature measurement and data that continuous wind tunnel cooling system is not yet found in known open source literature and patent are adopted
The description of collecting system.
Summary of the invention
To solve the deficiency that the prior art is unsuitable for continuous wind tunnel cooling system, the invention proposes a kind of continous way wind
The temperature of hole cooling system measures and data collection system.
The present invention passes through armouring integral temperature transmitter, the patch type temperature sensor of combined use and temperature pick-up
Device, thermocouple total temperature framed bent measure the numerical value of the multiple temperature control points of continuous wind tunnel cooling system respectively, and by analog acquisition mould
After block, Thermocouple module are respectively acquired temperature transmitter signal and thermocouple signal, carried out by data acquisition controller
Signal analysis and processing, wherein temperature control target of the total temperature framed bent electric thermo-couple temperature as cooling control system；Cooling control system is same
When the temperature signal of other temperature control points is monitored, so as to test data analyzer, and will affect the letter of wind-tunnel and equipment safety
It number is included in safety interlocking monitoring, data acquisition controller is also used as cooling control system core controller, by all temperature datas
It is uploaded to wind-tunnel core controller and carries out storage and show.
The armouring integral temperature transmitter includes the first armouring integral temperature transmitter, the second armouring integral type
Temperature transmitter, third armouring integral temperature transmitter, the 4th armouring integral temperature transmitter, the 5th armouring integral type temperature
Spend transmitter and the 6th armouring integral temperature transmitter；Wherein, the first armouring integral temperature transmitter is mounted on gas
Change on device export pipeline, the second armouring integral temperature transmitter is mounted on the liquid nitrogen transfer pipeline of feed flow valve group rear end, is located at
Collect among pendular ring and feed flow valve group, third armouring integral temperature transmitter is mounted on liquid collecting endless tube road highest point, is particularly located at
Liquid collecting top of the ring above wind-tunnel axis, the 4th armouring integral temperature transmitter are mounted on collector ring pipeline highest point, specifically
The gas collection top of the ring above wind-tunnel axis, the 5th armouring integral temperature transmitter be located at fluid-N2 spraying section and heat exchanger it
Between, it is mounted on wind tunnel body circuit and 7 meters of Range compress machine end, the 6th armouring integral temperature transmitter is mounted on wind-tunnel
On the body circuit of heat exchanger section hole.
The armouring integral temperature transmitter includes sensor and transmitter two parts, in which: sensor uses PT100
Platinum sensor, sensor to transmitter use three-wire system connection type, -250 DEG C of temperature-measuring range~100 DEG C, A grades of precision；
Temperature-sensitive end protection pipe variable diameter is to 1.9mm；Transmitter is exported using 4~20mA of two-wire system electric current；The Whole Response time: gas medium
T0.5< 8s, liquid medium T0.5<1s。
The armouring integral temperature transmitter is all pacified by the way of perpendicular to institute's test tube road/hole body circuit axis
Dress, the insertion depth of the temperature-sensitive end protection pipe of each armouring integral temperature transmitter by survey pipeline diameter 1/2.
The patch type temperature sensor includes the first patch type temperature sensor and the second patch type temperature sensor,
In the first patch type temperature sensor be mounted at collection pendular ring upstream solenoid valve block, be located at this wind-tunnel outer wall below wind-tunnel axis
On；The second patch type temperature sensor is mounted at collection pendular ring downstream electrical magnet valve group, is located at this wind below wind-tunnel axis
On the outer wall of hole；The terminals of the first patch type temperature sensor and the terminals of the first temperature transmitter pass through quad
It is attached according to specified pin；The wiring of the terminals and second temperature transmitter of the second patch type temperature sensor
End is attached by quad according to specified pin；By temperature transmitter by each patch type temperature sensor
Signal is converted into current signal；
The temperature transmitter includes the first temperature transmitter and second temperature transmitter；First temperature transmitter
It is mounted at the solenoid valve block of fluid-N2 spraying section collection pendular ring upstream, close to the first patch type temperature sensor, second temperature transmitter
It is mounted at fluid-N2 spraying section collection pendular ring downstream electrical magnet valve group, close to the second patch type temperature sensor；Temperature transmitter is as far as possible
Close to corresponding patch type temperature sensor, distance is no more than 2 meters, and nearest suitable position is fixedly mounted.
The analogue collection module has 8 analog acquisition passages；The Thermocouple module totally 3, often only 4
Thermocouple acquisition channel；Each armouring integral temperature transmitter is successively connected with 1~6 channel of analogue collection module respectively
It connects；Each temperature transmitter is successively connect with 7~8 channels of analogue collection module respectively, and the signal of each transmitter is just
The signal anode in each channel of analogue collection module is terminated, the signal negative terminal of each transmitter connects the signal negative terminal in each channel；Total temperature
It is evenly arranged 9 thermocouple temperature sensors on framed bent, each thermocouple temperature sensor of total temperature framed bent is divided into 3 groups, and
It is respectively connected on each channel in 3 thermocouple acquisition modules；The signal of each thermocouple temperature sensor is just terminating thermocouple and is adopting
Collect the signal anode in each channel of module, the signal negative terminal of each thermocouple temperature sensor connects the signal negative terminal in each channel.
It rises to top disposed at equal distance bottom of each thermocouple temperature sensor on the total temperature framed bent；The heat
- 30 DEG C~60 DEG C of galvanic couple temperature sensor temperature-measuring range, 0.5 DEG C of precision, response time T0.9=0.5s.
Compared with prior art, the beneficial effect that the present invention obtains is:
1, measuring accuracy is higher, response is fast.Stable section total temperature framed bent uses in high precision, quick response thermocouple sensor,
Temperature signal is acquired by the acquisition module of high-resolution and high sampling rate, to ensure that the precision and speed of test data
Degree.0.5 DEG C of measuring accuracy, the Whole Response time < 1s.
2, the uniformity of total temperature test guarantees.Multiple temperature points are arranged on total temperature framed bent, according to stable section high uniformity
It is distributed in stable section air-flow center, and uses identical thermocouple sensor and acquisition module, ensure that the equal of temperature field measurement
Even property.Under 18 DEG C of test conditions of room temperature, each measuring point temperature deviation is less than 0.3 DEG C.
3, key node is detected, improves the safety of system.To liquid nitrogen gasification pipeline, liquid nitrogen transfer pipeline, liquid
Hole wall, favorable current heat exchanger etc. temperature are monitored at nitrogen injection, smoothly to implement spray liquid nitrogen cooling and guaranteeing the peace of wind-tunnel
Row for the national games lays the foundation.
The present invention is verified by NF-6 wind-tunnel cooling system, and verification result proves there is good effect.
Detailed description of the invention
Fig. 1 is temperature measurement and the data collection system components layout drawing of a kind of continuous wind tunnel cooling system.
Fig. 2 is a kind of continous way cooling wind-tunnel major sections layout.
In figure: 1. first armouring integral temperature transmitters；2. the second armouring integral temperature transmitter；3. third armouring
Integral temperature transmitter；4. the 4th armouring integral temperature transmitter；5. the first patch type temperature sensor；6. the second patch
Formula temperature sensor；7. the first temperature transmitter；8. second temperature transmitter；9. the 5th armouring integral temperature transmitter；10.
6th armouring integral temperature transmitter；11. total temperature framed bent；12. data acquisition controller；13. analogue collection module；14.
Thermocouple module；15. signal cable；16. infusion pipeline；17. blow valve；18. heat exchanger；19. being vented the interface of valve group；20.
Compensation lead of thermocouple；21. stable section；22. compressor；23. feed flow valve group；24. liquid nitrogen storage tank；25. liquid nitrogen pump；It is pushed away 26. squeezing
Valve group；27. distribution platform；28. gasifier；29. gas cylinders group；30. collecting pendular ring；31. collector ring；32. fluid-N2 spraying section, 33. heat exchange
Device section, 34. compressor sections.
Specific embodiment
The present embodiment is with the temperature measurement of Mr. Yu's continuous wind tunnel cooling system and data collection system, the master of the system
Want working principle are as follows: as described in the measurement of Fig. 1 temperature and data collection system components layout drawing, become by armouring integral temperature
Device, the patch type temperature sensor of combined use and temperature transmitter, thermocouple total temperature framed bent is sent to measure continuous wind tunnel respectively
The numerical value of the multiple temperature control points of cooling system, and temperature transmitter is believed respectively by analogue collection module 13, Thermocouple module 14
Number and thermocouple signal be acquired, then by data acquisition controller 12 carry out signal analysis and processing, wherein total temperature framed bent heat
Temperature control target of the galvanic couple temperature as cooling control system.Cooling control system simultaneously carries out the temperature signal of other temperature control points
Monitoring, so as to test data analyzer, and the signal that will affect wind-tunnel and equipment safety is included in safety interlocking monitoring, data acquisition control
Device 12 processed is also used as cooling control system core controller, and all temperature data uploadings to wind-tunnel core controller are stored
Display.
It is clear in order to state, so that temperature measurement and the data acquisition system of continuous wind tunnel cooling system is understood more intuitively
System first carries out the function of the structural principle of continuous wind tunnel cooling system, temperature measurement and each equipment of data collection system
It briefly describes.In Fig. 1, the first armouring integral temperature transmitter 1 is for measuring gasifier exit pipeline gas flow temperature；Second armour
Dress integral temperature transmitter 2 is for measuring liquid nitrogen transfer pipeline fluid temperature；Third armouring integral temperature transmitter 3 is used for
Measurement collection pendular ring fluid temperature；4th armouring integral temperature transmitter 4 is for measuring collector ring gas temperature；First patch type
Temperature sensor 5 collects hole wall temperature at the solenoid valve block of pendular ring upstream for measuring fluid-N2 spraying section 32；Second patch type temperature passes
Sensor 6 is for measuring hole wall temperature at fluid-N2 spraying section collection pendular ring downstream electrical magnet valve group；First temperature transmitter 7 is by the first patch
The mode that the signal that formula temperature sensor 5 acquires becomes electric current is transmitted；Second temperature transmitter 8 is by the second patch type temperature
The mode that the signal that sensor 6 acquires becomes electric current is transmitted；5th armouring integral temperature transmitter 9 is for measuring liquid nitrogen
Tunnel airstream temperature between spray section and heat exchanger；6th armouring integral temperature transmitter 10 is for measuring air-flow at heat exchanger
Temperature；Total temperature framed bent 11 uses 9 thermocouple sensors being equally spaced perpendicular to wind-tunnel axis, for measuring 21 gas of stable section
It flows temperature and characterizes the uniformity of gas flow temperature；Data acquisition controller 12 for data analysis handle, and with wind-tunnel core
Controller carries out data interaction；Analogue collection module 13 acquires each temperature transmitter measuring point signal by signal cable 15；Heat
Galvanic couple module 14 acquires each electric thermo-couple temperature measuring point signal by compensation lead of thermocouple 20；Infusion pipeline 16 is by liquid nitrogen storage tank
Liquid nitrogen is sent to Ji Yehuanchu；Liquid nitrogen/gas nitrogen emptying of the blow valve 17 on liquid nitrogen transfer pipeline and collection pendular ring, collector ring；When
Heat exchanger 18 is when wind-tunnel room temperature is run for reducing tunnel airstream temperature；The interface 19 of exhaust valve group is for adjusting tunnel pressure；
Compressor 22 is the driving source of wind-tunnel；The feed flow valve group 23 on the liquid nitrogen transfer pipeline of liquid nitrogen storage tank outlet is installed on for liquid nitrogen
Cleaning, pre-cooling and the liquid nitrogen filling of transfer pipeline；Liquid nitrogen storage tank 24 is for storing liquid nitrogen；It squeezes and pushes away valve group 26 and be placed in distribution platform
In, driving gas needed for crowded liquid nitrogen is provided；Drive gas required for the gas source of gas cylinders group 29 being adjusted to by distribution platform 27；Liquid
Nitrogen pump 25 and gasifier 28 for liquid nitrogen to be converted to gas nitrogen and is stored in gas cylinders group, as crowded propulsive liquid nitrogen driving gas source and
The driving gas source of Air control valve；Collection pendular ring 30 is filled for installing liquid nitrogen spray solenoid valve and nozzle, while for liquid nitrogen, liquid collecting
Ring solenoid group is divided into upstream solenoid valve block and downstream solenoid valve block, and collection pendular ring upstream solenoid valve block is located at 34 He of compressor section
Between heat exchanger section 33, specifically it is installed on close to compressor side, about 2 meters of Range compress machine end position, collects pendular ring downstream electrical magnetic
About 4 meters of valve group Range compress machine end position, collection pendular ring installation site are designed to obtain by aerodynamic conditions；Collector ring 31 is for collecting
Collect the nitrogen of pendular ring gasification.
In the present embodiment, the armouring integral temperature transmitter includes the first armouring integral temperature transmitter 1, the
Two armouring integral temperature transmitters 2, third armouring integral temperature transmitter 3, the 4th armouring integral temperature transmitter 4,
5th armouring integral temperature transmitter 9 and the 6th armouring integral temperature transmitter 10.Wherein, the first armouring integral type
Temperature transmitter is mounted on 28 export pipeline of gasifier；After second armouring integral temperature transmitter is mounted on feed flow valve group 23
It holds on liquid nitrogen transfer pipeline 16, is located among collection pendular ring and feed flow valve group；Third armouring integral temperature transmitter is mounted on collection
The highest point of 30 pipeline of pendular ring is particularly located at liquid collecting top of the ring above wind-tunnel axis；4th armouring integral temperature transmitter
It is mounted on the highest point of 31 pipeline of collector ring, is particularly located at gas collection top of the ring above wind-tunnel axis；5th armouring integral type temperature
Transmitter is spent between fluid-N2 spraying section 32 and heat exchanger 18, is installed on wind tunnel body circuit simultaneously Range compress machine end
7 meters；6th armouring integral temperature transmitter is mounted on 33 hole body circuit of wind-tunnel heat exchanger section.Above-mentioned armouring integral temperature
Transmitter is all installed by the way of perpendicular to institute's test tube road or hole body circuit axis.Each armouring integral temperature transmitter
The insertion depth of temperature-sensitive end protection pipe by survey pipeline diameter 1/2.
The patch type temperature sensor includes the first patch type temperature sensor 5 and the second patch type temperature sensor 6,
Wherein the first patch type temperature sensor is mounted at collection 30 upstream solenoid valve block of pendular ring, is located at this wind-tunnel below wind-tunnel axis
On outer wall；The second patch type temperature sensor is mounted at collection pendular ring downstream electrical magnet valve group, is located at this under wind-tunnel axis
On square wind-tunnel outer wall.The terminals of the terminals of the first patch type temperature sensor and the first temperature transmitter 7 pass through four
Core cable is attached according to specified pin；The terminals and second temperature transmitter of the second patch type temperature sensor
8 terminals are attached by quad according to specified pin；By transmitter by each patch type temperature sensing
The signal of device is converted into current signal, in order to transmit at a distance, and improves anti-interference ability.The patch type temperature sensor
It need to be processed according to the outer wall arc shape of wind-tunnel, when installation, be welded wind-tunnel outer wall is close to after the polishing of wind-tunnel outer wall
Installation, and hole wall at measuring point and patch type sensor are subjected to isothermal holding.
The temperature transmitter includes the first temperature transmitter 7 and second temperature transmitter 8.The first temperature pick-up
Device is mounted at the solenoid valve block of fluid-N2 spraying section collection pendular ring upstream, close to the first patch type temperature sensor；Second temperature pick-up
Device is mounted at fluid-N2 spraying section collection pendular ring downstream electrical magnet valve group, close to the second patch type temperature sensor.Temperature transmitter leans on
Nearly corresponding patch type temperature sensor, distance are no more than 2 meters.
It is steady that data acquisition controller 12, analogue collection module 13 and the Thermocouple module 14 is installed on wind-tunnel hall
Determine in the cooling system control cabinet at section 21.Data acquisition controller 12, analogue collection module 13 and the thermocouple mould
Block 14 is the standardization industry control module of times good fortune, is realized be electrically connected by core bus between each other, and passes through module end
The mechanical snap at end, is securely joined together, and is fixed in control cabinet on installation guide rail.
The analogue collection module totally 1, every only 8 analog acquisition passages.The Thermocouple module totally 3
Only, every only 4 thermocouple acquisition channels.Twisted signal cable 15 is shielded by each armouring integral temperature transmitter using two cores
Connect respectively with 1~6 channel of analogue collection module 13, by each temperature transmitter respectively with analogue collection module 13 7
The connection of~8 channels；When connection, the signal anode of each armouring integral temperature transmitter respectively with the analogue collection module
The signal anode in each channel connects, the signal negative terminal of each armouring integral temperature transmitter respectively with the analog acquisition mould
The signal negative terminal in each channel of block connects.
Using with the matched 9 two core compensating wires 20 of thermocouple sensor respectively by 1~9 thermocouple of total temperature framed bent
Temperature sensor is connect with 9 channels in 3 Thermocouple modules respectively.When connection, each thermocouple temperature sensor
Signal anode is connect with the signal anode in each channel in 3 Thermocouple modules respectively, each thermocouple temperature sensor
Signal negative terminal is connect with the signal negative terminal in each channel in 3 Thermocouple modules respectively.
According to Fig. 1 configuration armouring integral temperature transmitter, patch type temperature sensor, temperature transmitter, data acquisition
Controller, analogue collection module and thermocouple acquisition module.The wherein feature of each components are as follows:
Armouring integral temperature transmitter: including sensor and transmitter two parts, sensor is passed using PT100 platinum resistance
Sensor, sensor to transmitter use three-wire system connection type, -250 DEG C of temperature-measuring range~100 DEG C, A grades of precision；Temperature-sensitive end is protected
Pillar variable diameter is to 1.9mm.Transmitter is exported using 4~20mA of two-wire system electric current.The Whole Response time: gas medium T0.5<8s、
Liquid medium T0.5<1s.Above-mentioned armouring integral temperature transmitter performance parameter is identical, except that installation site and sensing
The slotting deep length of device protection pipe, and insert deep length is about surveyed pipeline diameter 1/2.
Patch type temperature sensor: four-wire system output, -50 DEG C of temperature-measuring range~70 DEG C, seamless can be installed on by A grades of precision
The external wall in fluid-N2 spraying section hole.
Temperature transmitter: the output of two-wire system 4~20mA electric current, A grades of precision.
Total temperature framed bent sensor 11: being evenly arranged 9 thermocouple temperature sensors on the total temperature framed bent, from stable section bottom
It rises to top at interval of one T-type thermocouple of disposed at equal distance, -30 DEG C of thermocouple temperature sensor temperature-measuring range~60 DEG C,
0.5 DEG C of precision, response time T0.9=0.5s, using dedicated compensation lead of thermocouple.
Data acquisition controller 12: BECKOFF times of good fortune embedded controller, clock frequency 1.6GHz, WinCE operation are used
System band real-time system environment.
The channel analogue collection module 13:8, resolution ratio 12, conversion time representative value 1.25ms.
The channel thermocouple acquisition module 14:4, band open circuit identification, responds most fast 20ms, defaults 250ms, the every numerical digit of resolution ratio
0.01℃.Data acquisition controller 12, analogue collection module 13, thermocouple acquisition module 14 are connected by E-BUS core bus
It connects.
It is connected to analogue collection module 13 by 1~4,7~10 with signal cable, with compensation lead of thermocouple by thermocouple
Temperature sensor is respectively connected to thermocouple acquisition module 14, and carries out hardware configuration respectively, then to controller and acquisition mould
Block carries out software configuration, determines resolution ratio and sample rate etc..
The specific steps of temperature measurement and data collection system work are as follows: data acquisition controller powers on, and then opens drop
Warm system control program reads the initial reading of each sensor, judges whether sensor works normally, and data acquisition controller is real-time
It acquires each sensor values and carries out software filtering processing, while the temperature signal for being related to system safety is monitored, so as to
It implements security interlocking protection, and all temperature data uploadings to wind-tunnel core controller are carried out storage and are shown.
Claims (8)
1. a kind of temperature of continuous wind tunnel cooling system measures and data collection system, which is characterized in that pass through armouring one
Formula temperature transmitter, the patch type temperature sensor of combined use and temperature transmitter, thermocouple total temperature the framed bent company of measurement respectively
The numerical value of the continuous multiple temperature control points of formula wind-tunnel cooling system, and by analogue collection module, Thermocouple module respectively to temperature pick-up
After device signal and thermocouple signal are acquired, signal analysis and processing is carried out by data acquisition controller, wherein total temperature framed bent heat
Temperature control target of the galvanic couple temperature as cooling control system；Cooling control system simultaneously carries out the temperature signal of other temperature control points
Monitoring, so as to test data analyzer, and the signal that will affect wind-tunnel and equipment safety is included in safety interlocking monitoring, data acquisition control
Device processed is also used as cooling control system core controller, and it is aobvious that all temperature data uploadings to wind-tunnel core controller are carried out storage
Show.
2. the temperature of continuous wind tunnel cooling system as described in claim 1 measures and data collection system, which is characterized in that institute
The armouring integral temperature transmitter stated includes the first armouring integral temperature transmitter, the second armouring integral temperature pick-up
Device, third armouring integral temperature transmitter, the 4th armouring integral temperature transmitter, the 5th armouring integral temperature transmitter
With the 6th armouring integral temperature transmitter；Wherein, the first armouring integral temperature transmitter is mounted on gasifier exit
On pipeline, the second armouring integral temperature transmitter is mounted on the liquid nitrogen transfer pipeline of feed flow valve group rear end, be located at collection pendular ring and
Among feed flow valve group, third armouring integral temperature transmitter is mounted on liquid collecting endless tube road highest point, is particularly located at wind-tunnel axis
Top liquid collecting top of the ring, the 4th armouring integral temperature transmitter are mounted on collector ring pipeline highest point, are particularly located at wind-tunnel
Gas collection top of the ring above axis, the 5th armouring integral temperature transmitter is between fluid-N2 spraying section and heat exchanger, installation
On wind tunnel body circuit and 7 meters of Range compress machine end, the 6th armouring integral temperature transmitter are mounted on wind-tunnel heat exchanger
On section hole body circuit.
3. the temperature of continuous wind tunnel cooling system as claimed in claim 2 measures and data collection system, which is characterized in that institute
Stating armouring integral temperature transmitter includes sensor and transmitter two parts, in which: sensor is passed using PT100 platinum resistance
Sensor, sensor to transmitter use three-wire system connection type, -250 DEG C of temperature-measuring range~100 DEG C, A grades of precision；Temperature-sensitive end is protected
Pillar variable diameter is to 1.9mm；Transmitter is exported using 4~20mA of two-wire system electric current；The Whole Response time: gas medium T0.5<8s、
Liquid medium T0.5<1s。
4. the temperature of continuous wind tunnel cooling system as claimed in claim 2 measures and data collection system, which is characterized in that institute
It states armouring integral temperature transmitter all to install by the way of perpendicular to institute's test tube road/hole body circuit axis, each armouring one
The insertion depth of the temperature-sensitive end protection pipe of body formula temperature transmitter by survey pipeline diameter 1/2.
5. the temperature of continuous wind tunnel cooling system as described in claim 1 measures and data collection system, which is characterized in that institute
Stating patch type temperature sensor includes the first patch type temperature sensor and the second patch type temperature sensor, the temperature pick-up
Device includes the first temperature transmitter and second temperature transmitter；Wherein the first patch type temperature sensor is mounted on collection pendular ring upstream
At solenoid valve block, it is located at this below wind-tunnel axis on wind-tunnel outer wall；The second patch type temperature sensor is mounted on liquid collecting
At the solenoid valve block of ring downstream, it is located at this below wind-tunnel axis on wind-tunnel outer wall；The first patch type temperature sensor connects
The terminals of line end and the first temperature transmitter are attached by quad according to specified pin；Second patch type
The terminals of temperature sensor and the terminals of second temperature transmitter are attached by quad according to specified pin；
The signal of each patch type temperature sensor is converted into current signal by temperature transmitter.
6. the temperature of continuous wind tunnel cooling system as claimed in claim 5 measures and data collection system, which is characterized in that institute
The first temperature transmitter stated is mounted at the solenoid valve block of fluid-N2 spraying section collection pendular ring upstream, close to the first patch type temperature sensing
Device, second temperature transmitter are mounted at fluid-N2 spraying section collection pendular ring downstream electrical magnet valve group, close to the second patch type temperature sensing
Device；Temperature transmitter is as close as possible to corresponding patch type temperature sensor, and distance is no more than 2 meters, the fixed peace of nearest suitable position
Dress.
7. the temperature of continuous wind tunnel cooling system as described in claim 1 measures and data collection system, which is characterized in that institute
The analogue collection module stated has 8 analog acquisition passages；The Thermocouple module totally 3, often only 4 thermocouple acquisitions
Channel；Each armouring integral temperature transmitter is successively connect with 1~6 channel of analogue collection module respectively；It respectively will be each
Temperature transmitter is successively connect with 7~8 channels of analogue collection module, and each armouring integral temperature transmitter and Ge Wen
The signal anode of degree transmitter connects the signal anode of each analog acquisition passage respectively, each armouring integral temperature transmitter and each
The signal negative terminal of temperature transmitter connects the signal negative terminal of each analog acquisition passage respectively；9 heat are evenly arranged on total temperature framed bent
Each thermocouple temperature sensor of total temperature framed bent is divided into 3 groups by galvanic couple temperature sensor, and is respectively connected to 3 thermocouples and is adopted
Collect on each channel in module；The signal of each thermocouple temperature sensor is just terminating the signal in each channel of thermocouple acquisition module just
End, the signal negative terminal of each thermocouple temperature sensor connect the signal negative terminal in each channel of thermocouple acquisition module.
8. the temperature of continuous wind tunnel cooling system as claimed in claim 7 measures and data collection system, which is characterized in that each
It rises to top disposed at equal distance bottom of the thermocouple temperature sensor on the total temperature framed bent；The electric thermo-couple temperature passes
- 30 DEG C of sensor temperature-measuring range~60 DEG C, 0.5 DEG C of precision, response time T0.9=0.5s.
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| CN112947621B (en) * | 2020-09-30 | 2022-04-12 | 北京空间机电研究所 | High-precision temperature measurement and control method based on double feedback |
| CN112326184B (en) * | 2020-11-25 | 2022-07-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Frequency-variable high-precision wind tunnel test data acquisition method |
| TWI806157B (en) * | 2021-09-13 | 2023-06-21 | 英業達股份有限公司 | Liquid temperature measurement method in liquid cooling circulation |
| CN114489174B (en) * | 2021-12-28 | 2023-03-07 | 中国航天空气动力技术研究院 | Automobile environment wind tunnel temperature control system based on chain type automatic control strategy |
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