CN107943153A - The parallel temperature-controlling system of multi-measuring point multiloop under vacuum low-temperature environment - Google Patents
The parallel temperature-controlling system of multi-measuring point multiloop under vacuum low-temperature environment Download PDFInfo
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- 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
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Abstract
It is suitable for the multiloop temperature concurrent control system of multi-measuring point of operation under vacuum conditions the invention discloses a kind of, is mainly made of central control unit (100), temperature collecting cell (200), distributed control temperature unit (300)；Central control unit (100) is issued for the instruction of system temperature controlling function and data transfer, by the control information of central control terminal, temperature acquisition interface unit (210) and distributed temperature control interface unit (310) are issued to respectively, and receive the system operation information of temperature acquisition interface unit (210) and distributed temperature control interface unit (310) transmission, status information, procedural information, data message etc..Acquisition speed is substantially improved in the present invention, and collection period is lifted to Millisecond from 60S, most can reach the picking rate of 50Hz (20ms) soon, the control instruction corresponding time is promoted to 5ms from 400ms.
Description
Technical field
The invention belongs to space environment simulation techniques field, and in particular to a kind of multi-measuring point being used under vacuum low-temperature environment
Multiloop parallel temperature-controlling system and temperature control method.
Background technology
Artificial satellite and other spacecrafts are chronically at ultrahigh vacuum and ultra-low temperature surroundings after injection mission phase
In, while influenced by space heat flux environment, for the correctness of verifying satellites thermal design, ensure the work of satellite reliably and with long-term
Make, and complete every predetermined task, during satellite is developed, it is necessary to is empty in simulation according to the regulation of test specification
Between vacuum thermal test is carried out to Space Vehicle System level and component level under vacuum, cold black and Orbital heat flux environment.
Vacuum thermal test excessively in, temperature controlled effect, stability, overshoot amplitude, programming rate etc., the verification to experiment
As a result correctness has very important influence.So temperature-controlling system is one of core system of space simulator.Due to
Itself measuring point quantity of medium-and-large-sized thermal vacuum test and small-sized thermal vacuum test and temperature control circuit quantity are different, different using two kinds
Control method realizes test function.
Medium-and-large-sized thermal vacuum test, due to more than measuring point and temperature control circuit quantity more (measuring point is more than 200 points, temperature control circuit
More than 100 tunnels), all measuring points can be used as temperature control feedback point.Generally use Multifunctional digital universal meter and journey at present
Control power supply and carry out temperature survey and temperature control.It can support all kinds of temperature and heat flow transducer (such as thermocouple, platinum resistance, temperature-sensitive
Resistance, black-film heat-flow meter, square fort heat-flow meter etc.).Multifunctional digital universal meter and programmable power supply are used in host computer
Software carries out instrument the functions such as remote control, control calculating, data record.Computer remote temperature control, during experiment
Control feedback point and heating circuit can be adjusted flexibly, and control algolithm carries out in a computer, it is possible to achieve complicated control is calculated
Method.But this method serially carries out temperature survey using multi-function multimeter, generally only one or several measuring units,
, it is necessary to which longer time could complete the temperature survey of a cycle in the case that Measurement channel number is more；Journey needed for temperature control
Control power supply needs host computer slower by communication protocol driving and status monitoring, detection actuating speed；So temperature survey and
Programmable power supply driving time is longer, temperature control is produced the hysteresis of some time, influences temperature control effect.Moreover, in complexity
In network environment, cable connection easily occurs and disconnects, or the situation of network congestion, make the control instruction of host computer can not be sent to
In instrument, cause control abnormal.
Small-sized thermal vacuum test, due to measuring point and temperature control circuit it is less (measuring point is within 40, temperature control circuit 10 tunnels with
It is interior), temperature control feedback point only has one or several and substantially stationary.Generally local temperature control, temperature are carried out using temperature controller or PLC
Degree feedback point sensor uses platinum resistance, and platinum resistance is connected directly between on temperature controller or temperature control module, and temperature controller passes through analog quantity
Power supply output is controlled, completes temperature control, Analog control power supply fast response time, hysteresis quality is small, simple temperature control effect
It is good.But this kind of temprature control method, temperature feedback point are fixed, can not exchanged during temperature control by software, temperature is supported
It is single to spend sensor type, it is relatively low to temperature sensor measurement precision and power supply Analog control precision, and single instrument
Temperature control passage it is less, as channel requirements quantity it is more when, instrument stacks that occupied space is larger, maintenance difficulties are substantially improved, firmly
Part is of high cost, so can not expand in medium-and-large-sized vacuum thermal test.
The temperature control system of current medium-and-large-sized vacuum thermal test, hardware serial collection and control mode speed are slow, temperature
Control hysteresis quality serious.Small-sized thermal vacuum test temperature control system, autgmentability is poor, and temperature control point is configured with temperature monitoring point
It is fixed, attribute cannot be flexibly changed during experiment；Temperature measurement accuracy is low；Sensor type is single.With space simulator
Integrated automation is horizontal, the raising of reliability requirements, and the above problem is increasingly prominent.Existing control means are big in can not meeting
The higher and higher temperature control demand of type vacuum thermal test.
The content of the invention
To improve temperature controlled effect in medium-and-large-sized thermal vacuum test, the development trend of space simulator is adapted to,
The present invention with reference to the advantages of existing large-scale and small-sized thermal vacuum test temprature control method, is being retained greatly using the method for innovation
In the control of type thermal vacuum test multichannel temperature while the precision of temperature feedback flexibility and power drives, use is 1. high-precision
Spend full parellel data acquisition equipment and improve temperature survey speed；2. power supply program control driving is separated with power supply status monitoring, improve
Temperature control process power supply response speed；3. temperature control will be concentrated to be changed to distributed temperature control, optimize temperature control effect, have good
Scalability.Being improved at above-mentioned three greatly improves temperature acquisition and temperature control speed, greatly shortens temperature controlled stagnant
Time afterwards, temperature control effect improve substantially, improve temperature controlled reliability.Simultaneously as full parellel and distributed
Design, set expandability is good, and control lag time will not be because of the increasing of measuring point quantity and temperature control circuit quantity with temperature control effect
Add and change.
It is a kind of simple in structure, easy to use new the purpose of the present invention is being provided for space simulator vacuum thermal test
Parallel temperature-controlling system, solves the problems such as existing multi-measuring point multiloop vacuum thermal test control hysteresis is serious.
The present invention seeks to what is be achieved through the following technical solutions：
The present invention is suitable for the multiloop temperature concurrent control system of multi-measuring point of operation under vacuum conditions, mainly in
Entreat control unit, temperature collecting cell, distributed control temperature unit composition；
Wherein described central control unit：Including man-machine interaction unit, condition monitoring unit, central control interface unit,
Data storage cell, the multiloop parallel temperature-controlling system of multi-measuring point that the man-machine interaction unit is used under vacuum low-temperature environment are used
Family instruction input and system operation information and equipment state tabular Graphical output；Condition monitoring unit is used to monitor in real time
The communication state of whole system, instrument operating status, periodically by central control interface unit to temperature collecting cell and distribution
Formula control temperature unit sends instruction, carries out power state detection and data acquisition instrument state-detection, and receives corresponding detection letter
Breath, system communication state, instrument operating status, carry out system mode judgement according to information, identifying system abnormal conditions and transfinite
Alarm condition, and will judge that result is sent to human-machine interface unit, carry out system monitoring state real-time display and abnormal alarm；
The temperature collecting cell, including temperature acquisition interface unit, data acquisition unit, acquisition state detection unit；
All passages of data acquisition unit are parallel acquisition, i.e., each passage is provided with corresponding AD conversion module, is carried out at the same time
Data acquisition；
The distribution control temperature unit, including distributed temperature control interface unit, power control unit, temperature control state-detection list
Member, distributed temperature control interface unit are used to receiving control instruction transmitted by central control interface unit, and by distributed temperature control
System operation information that unit is gathered, status information of equipment, control procedural information etc. are sent to central control unit, are used at the same time
In the real time temperature data that the temperature collecting cell collection for receiving the transmission of temperature data transmission unit calculates, and pass data to
Power control unit, carries out corresponding power supply control.
Wherein, the instruction of user instruction input includes data acquisition enabled instruction, temperature control enabled instruction, data acquisition parameters
Setting, sensor parameters setting, the setting of control loop parameter setting, alarm limit.
Wherein, system operation information and equipment state tabular Graphical output include data acquisition parameters, control loop
Parameter, sensor temperature data, power supply control data, system monitoring state, real time temperature data and curves.
Wherein, system exception includes power supply communication failure, data acquisition instrument communication failure, sensor failure, heats back
Short out road, heating circuit short circuit.
Wherein, overload alarm situation includes temperature over-range, electric current transfinites, warming and cooling rate transfinites.
Wherein, the data memory format and store path that data storage cell is set according to man-machine interaction unit, timing are protected
Deposit system data.
Wherein, temperature acquisition interface unit is used to receiving control instruction transmitted by central control interface unit, and by temperature
System operation information, status information of equipment, the information of temperature data that degree collecting unit is gathered are sent to central control unit,
At the same time the temperature data calculated is gathered for transmitting data acquisition unit to distributed temperature control interface unit.
Wherein, data acquisition unit includes data acquisition instrument driving unit, parallel drive unit, sensor fitting list
Member, device longevity unit；
Data acquisition instrument driving unit obtains acquisition instructions, data acquisition parameters and user's input from man-machine interaction unit
Instruction, according to command adapted thereto and parameter, driving data acquisition instrument carries out the data acquisition of respective channel and respective type, there is provided
Sensor measures initial data, and data message is sent to sensor fitting unit；
Parallel drive unit realizes different data acquisition instrument concurrent working, different passages are surveyed by hardware synchronization module
Point acquisition time error is less than 20ms, ensures the synchronism of data acquisition, the validity of temperature data；
Sensor fitting unit obtains sensor parameters information according to from man-machine interaction unit, and data acquisition instrument is driven
The sensor measurement initial data of unit collection, by corresponding the Fitting Calculation, is converted into temperature data；
Each passage accumulation access times of each instrument of device longevity unit record and Cumulative Elapsed Time, when accumulation access times
Reach working service threshold values with Cumulative Elapsed Time, which can send maintenance and be prompted with detection, and will send information to state
Monitoring unit, prompts user to carry out corresponding maintenance program.
Wherein, the operating status of acquisition state detection unit timing detection temperature collecting unit, and send data to shape
State monitoring unit, carries out corresponding judgement processing.
Further, the operating status includes data acquisition instrument operating status, communication state, working sensor shape
State.
Wherein, power control unit includes power source drive unit, parameter tuning unit, control strategy unit, parallel drive
Unit, power source life unit；
Power source drive unit obtains control instruction from man-machine interaction unit, is exported according to the power supply of control strategy unit requirement
Parameter, the electric current and voltage output of power supply are controlled by stored program control system；
Parameter tuning unit needs the control loop of parameter tuning by man-machine interaction unit selection, according to parameter self-tuning
Algorithm, carries out PID or PI controlling strategy parameter Self-tuning Systems, and after tuning process, the parameter after adjusting is returned to man-machine friendship
Mutual unit is exported；
Control strategy unit obtains control parameter and default control strategy from man-machine interaction unit, according to temperature acquisition list
The temperature information that member feeds back each temperature control circuit carries out temperature control；
Parallel drive unit：Parallel drive scheduling is carried out to programmable power supply, ensures that the response speed of control instruction is less than
20ms；
Every programmable power supply Cumulative Elapsed Time of power source life unit record, when Cumulative Elapsed Time reaches working service valve
Value, which can send maintenance and be prompted with detection, and will send information to condition monitoring unit, prompt user to be tieed up accordingly
Protect program.
Wherein, the temperature control state detection unit timing detects the operating status of distributed control temperature unit.
Wherein, during testing result timing is sent to by the temperature control state detection unit by distributed temperature control interface unit
Control unit is entreated, judgement processing is carried out to detection information in condition monitoring unit, power supply and circuit real-time status are passed through interpersonal
Interactive unit is shown.
Wherein, operating status includes programmable power supply operating status, communication state, heating circuit state.
Further, heating circuit state-detection is installation current transformer, voltage transmission at every power output end
Device, 0-10V is converted to by power output signal, and is accessed in the measurement module of distributed control temperature unit, defeated by detecting power supply
Go out electric current and voltage, power supply and loop state are detected.
Wherein, in distributed control temperature unit controller, 6 separate threads are opened up, by 30 journeys in each power supply cabinet
Control power supply is evenly distributed in 6 threads and carries out, i.e., per thread has 5 programmable power supplys, and the separate unit power command corresponding time is
2-3ms, it is 15ms that 5 programmable power supplys, which instruct the corresponding time,.
The parallel temperature-controlling system of multi-measuring point multiloop under the vacuum low-temperature environment of the present invention has following improvement effect：
Acquisition speed, collection week is substantially improved using high-precision full parellel data acquisition module in temperature point collection
Phase is lifted to Millisecond from 60S, most can reach the picking rate of 50Hz (20ms) soon；By temperature control programmable power supply output control and control
Temperature loops detection separates, and programmable power supply driving time is not depended on power supply self performance, instructs the corresponding time to be promoted to from 400ms
5ms；Solve in medium-and-large-sized space simulator vacuum thermal test, when multi-measuring point, more Measurement channels, due to temperature data acquisition
Temperature control caused by time is long, programmable power supply actuating speed is slow etc. lags serious problem；
The original serial acquisition instrument of full parellel module replacement is used since temperature point gathers, temperature control in temperature control loop collection
System is changed to distributed temperature control, and system is with good expansibility, and according to actual tests increase in demand or can reduce corresponding
Module, adapts to different measuring points quantity and circuit quantitative requirement, and due to system in parallel and distributed nature, system extension does not interfere with
Collection and control time, do not influence temperature control system performance, solve medium-and-large-sized space simulator system scale extension, shadow
The problem of ringing temperature control effect；
The different temperatures sensor that compatibility vacuum thermal test of the invention uses, can be according to sensor requirement, individually
Set the Fitting Calculation parameter；Temperature control point and temperature monitoring point can during experiment arbitrary disposition according to demand, especially exist
During in face of the subjects of thermal model complexity, decoupling processing can be carried out.
Brief description of the drawings
For the clearer explanation embodiment of the present invention, simple Jie will be to attached drawing needed in the embodiment below
Continue：.
Fig. 1 is the multiloop temperature concurrent control system of multi-measuring point being suitable for running under vacuum conditions of the present invention
Structure diagram；
Fig. 2 is the present invention suitable for running the multiloop temperature concurrent control system of multi-measuring point under vacuum conditions
The structure diagram of data acquisition unit；
Fig. 3 is the present invention suitable for running the multiloop temperature concurrent control system of multi-measuring point under vacuum conditions
The structure diagram of power control unit.
Embodiment
Below in conjunction with attached drawing the present invention is described in further detail, but this is merely exemplary, it is no intended to this
The protection domain of invention carries out any restrictions.Introduced below is the embodiment as present invention, below by
Embodiment is made further to illustrate to present invention.Certainly, it is only this hair of example to describe following detailed description
The content of bright different aspect, and should not be construed as the limitation scope of the invention.
As shown in Figure 1, it shows a kind of multiloop parallel temperature-controlling system of multi-measuring point being used under vacuum low-temperature environment
Form structure chart.System includes central control unit (100), data acquisition unit (200), distributed control temperature unit (300).
Wherein described central control unit (100)：Including man-machine interaction unit (110), condition monitoring unit (120), in
Control interface unit (130), data storage cell (140) are entreated, as system main logic unit, central control unit (100)
Be mainly used for parameter issue, instruct issue, hardware resource scheduling, human-computer interaction, data storage etc..Wherein, temperature collecting cell
(200) it is mainly used for sensor data acquisition, temperature data the Fitting Calculation and acquisition state detection.Use high-precision parallel data
Acquisition module and corresponding parallel drive methods, (are not less than 6 half or AD conversion precision while realizing high-accuracy data acquisition
Not less than 24) all passages of module are parallel acquisition, and picking rate is not less than 50Hz；Can be different according to temperature sensor,
Corresponding acquisition module is selected, the data acquisition of thermocouple, thermistor, platinum resistance can be completed.Port number can pass through increasing
Add corresponding data acquisition module to carry out any amount extension, do not influence picking rate and acquisition precision, meet temperature control rate request；
Man-machine interaction unit (110)：It is to be used for the multiloop parallel temperature-controlling system of the multi-measuring point under vacuum low-temperature environment
Family instruction input (such as data acquisition enabled instruction, temperature control enabled instruction, data acquisition parameters setting, sensor parameters setting, control
Loop parameter processed is set, alarm limit is set etc.) and system operation information and equipment state tabular Graphical output (such as data
Acquisition parameter, control loop parameter, sensor temperature data, power supply control data, system monitoring state, real time temperature data are bent
Line etc.)；
Condition monitoring unit (120)：Communication state, instrument operating status for monitoring whole system in real time etc., timing
Instruction is sent to temperature collecting cell (200) and distributed control temperature unit (300) by central control interface unit (130), into
Row power state detection and data acquisition instrument state-detection, and receive corresponding detection information, system communication state, instrument fortune
Row state etc., system mode judgement, (such as power supply communication failure, power supply the output event of identifying system abnormal conditions are carried out according to information
Barrier, data acquisition instrument communication failure, data acquisition instrument collection failure, sensor failure, heating circuit short circuit, heating circuit
Open circuit etc.) and overload alarm situation (such as temperature over-range, electric current transfinite, warming and cooling rate transfinites), and will judge that result is sent to
Human-machine interface unit (110), carries out system monitoring state real-time display and abnormal alarm；
Central control interface unit (130)：Instruction for system temperature controlling function issues and data transfer, and center is controlled
The control information at end, is issued to temperature acquisition interface unit (210) and distributed temperature control interface unit (310) respectively, and receives
System operation information, status information, the mistake that temperature acquisition interface unit (210) and distributed temperature control interface unit (310) send
Journey information, data message etc.；
Data storage cell (140)：The data memory format and store path set according to man-machine interaction unit (110),
Timing maintains system data；
The temperature collecting cell (200), including temperature acquisition interface unit (210), data acquisition unit (220), adopt
Collect state detection unit (230)；The core of the unit is high-precision parallel data acquisition module, and acquisition precision is not less than 6 half
(or AD conversion precision is not less than 24).All passages of module are parallel acquisition, i.e., each passage is provided with corresponding AD and turns
Block is changed the mold, data acquisition can be carried out at the same time, low precision acquisition speed is not less than 50Hz, and high precision collecting speed is not less than 1Hz.
Module can be different according to temperature sensor, select corresponding acquisition module, can complete thermocouple, thermistor, platinum resistance
Data acquisition.Port number can by increase corresponding data acquisition module carry out any amount extension, do not influence picking rate and
Acquisition precision.
Temperature acquisition interface unit (210)：For receiving the control instruction transmitted by central control interface unit (130),
And system operation information, status information of equipment, the information such as temperature data for being gathered temperature collecting cell (200) are sent into
Control unit (100) is entreated, while based on transmitting data acquisition unit (220) collection to distributed temperature control interface unit (310)
The temperature data of calculation；
Data acquisition unit (220)：Including data acquisition instrument driving unit (221), parallel drive unit (222), pass
Sensor fitting unit (223), device longevity unit (224)；
Data acquisition instrument driving unit (221)：The unit obtains acquisition instructions, data from man-machine interaction unit (110)
The user input instructions such as acquisition parameter, according to command adapted thereto and parameter, driving data acquisition instrument carries out respective channel and corresponding
The data acquisition of type, there is provided sensor measures initial data, and data message is sent to sensor fitting unit (223)；
Parallel drive unit (222)：Measuring point quantity is more to need more data acquisition instruments to work at the same time, same by hardware
Module is walked, realizes different data acquisition instrument concurrent working, different passage measuring point acquisition time errors are less than 20ms, ensure data
The synchronism of collection, the validity of temperature data；
Sensor fitting unit (223)：The unit obtains the letter such as sensor parameters according to from man-machine interaction unit (110)
Breath, measures initial data, by corresponding the Fitting Calculation, conversion by the sensor of data acquisition instrument driving unit (221) collection
Into temperature data；
Device longevity unit (224)：Each passage accumulation access times of each instrument and Cumulative Elapsed Time are recorded, when accumulation makes
Reach working service threshold values with number and Cumulative Elapsed Time, which can send maintenance and be prompted with detection, and information is sent
To condition monitoring unit (120), user is prompted to carry out corresponding maintenance program.
Acquisition state detection unit (230)：The operating status of the unit timing detection temperature collecting unit (200), including
Data acquisition instrument operating status (monitoring failure code), communication state, working sensor state etc., and send data to shape
State monitoring unit (120), carries out corresponding judgement processing.
Distributed control temperature unit (300)：Including distributed temperature control interface unit (310), power control unit (320), control
Temperature state detection unit (330).Programmable power supply is divided in units of cabinet, each cabinet installs a distributed temperature control list
Member.Wherein, distributed control temperature unit (300) is mainly used for driving programmable power supply output, temperature control, temperature control state-detection etc.,
The electric current and voltage output of power supply are controlled by stored program control system, Current Voltage setting uncertainty is not less than 0.2% and 0.5%,
Set resolution ratio and be not less than 0.2 ‰, control instruction response speed is better than 20ms；Current Voltage monitoring uncertainty is not less than
0.2% and 0.7%, setting resolution ratio is not less than 0.2 ‰；During temperature control, feedback point, control strategy and control parameter,
It can be adjusted flexibly at any time, the different controls during adequacy test require.
Distributed temperature control interface unit (310)：Refer to for receiving the control transmitted by central control interface unit (130)
Order, and distributed control temperature unit (300) is gathered system operation information, status information of equipment, the control hair such as procedural information
Send to central control unit (100), while for receiving the temperature collecting cell of temperature data transmission unit (210) transmission
(200) the real time temperature data that collection calculates, and power control unit (320) is passed data to, carry out corresponding power supply control
System；
Power control unit (320)：Including power source drive unit (321), parameter tuning unit (322), control strategy list
First (323), parallel drive unit (324), power source life unit (325)；
Power source drive unit (321)：The unit obtains control instruction from man-machine interaction unit (110), according to control strategy
The power supply output parameter of unit (323) requirement, the electric current and voltage output of power supply, Current Voltage setting are controlled by stored program control system
Uncertainty is not less than 0.2% and 0.5%, and setting resolution ratio is not less than 0.2 ‰；
Parameter tuning unit (322)：The control loop of parameter tuning, root are needed by man-machine interaction unit (110) selection
According to parameter self-tuning algorithm, PID or PI controlling strategy parameter Self-tuning Systems are carried out, after tuning process, by the parameter after adjusting
Exported back to man-machine interaction unit (110)；
Control strategy unit (323)：The unit obtains control parameter and default control plan from man-machine interaction unit (110)
Slightly, the temperature information for each temperature control circuit being fed back according to temperature collecting cell (200) carries out temperature control；Temperature control phase between each circuit
It is mutually independent, feedback temperature point and control parameter can before the test with random configuration modification as needed in experiment；Unit is preset more
Kind of control strategy, can be added control strategy by man-machine interaction unit (110), edit etc. and changing, meeting different tests
Temperature control requirement；
Parallel drive unit (324)：Parallel drive scheduling is carried out to programmable power supply, ensure the response speed of control instruction by
In 20ms；In distributed control temperature unit (300) controller, 6 separate threads are opened up, it is program-controlled by 30 in each power supply cabinet
Power supply is evenly distributed in 6 threads and carries out, i.e., per thread has 5 programmable power supplys, and the separate unit power command corresponding time is 2-
3ms, it is 15ms that 5 programmable power supplys, which instruct the corresponding time, ensures the synchronism of programmable power supply driving, the validity of temperature control；
Power source life unit (325)：Every programmable power supply Cumulative Elapsed Time is recorded, when Cumulative Elapsed Time reaches use
Safeguard threshold values, which can send maintenance and be prompted with detection, and will send information to condition monitoring unit (120), prompt user
Carry out corresponding maintenance program.
Temperature control state detection unit (330)：Unit timing detects the operating status of distributed control temperature unit (300), bag
Include programmable power supply operating status (monitoring failure code), communication state, heating circuit state etc., heating circuit state-detection be
Current transformer is installed, voltage transmitter, 0-10V is converted to by power output signal, and is accessed and divided at every power output end
In the measurement module of cloth control temperature unit (200), by detecting electric power outputting current and voltage, power supply and loop state are carried out
Detection, Current Voltage monitoring uncertainty are not less than 0.2% and 0.7%, and setting resolution ratio is not less than 0.2 ‰, and detection is tied
Fruit timing is sent to central control unit (100) by distributed temperature control interface unit (210), in condition monitoring unit (120)
Judgement processing is carried out to detection information, power supply and circuit real-time status are shown by interpersonal interactive unit (110)；
The multi-measuring point multiloop parallel temperature-controlling system of the present invention being used under vacuum low-temperature environment, redesigns system
System structure, is divided into central control unit, temperature collecting cell and distribution control temperature unit, per part by several work(by temperature-controlling system
Energy subelement composition, three are connect by central control interface unit (130) temperature acquisition interface unit (210) and distributed temperature control
Mouth unit (310) carries out funcall and data interaction.By redesigning temperature collecting cell (using high-precision full parellel number
According to acquisition module lifting temperature acquisition speed) and temperature control unit (temperature control programmable power supply output control and the detection of temperature control circuit
Separate, reduce the power drives corresponding time) temperature control delay degree is reduced, improve temperature control effect；By temperature simultaneously
Row collection and distributed temperature control, improve the autgmentability of temperature-controlling system, solve medium-and-large-sized space simulator system rule
Mould extends, the problem of influencing temperature control effect；And each system mode detection and monitoring function are added, improves system
Reliability.The invention has the characteristics that：1. using parallel, distributed control mode, system can flexible expansion, do not interfere with and be
System performance；2. temperature control point and temperature monitoring point can during experiment arbitrary disposition according to demand, especially in face of hot-die
During the subjects of type complexity, decoupling processing can be carried out；3. parallel temperature control speed is fast, the large time delay during solution temperature control is asked
Topic.The medium-and-large-sized parallel temperature-controlling system of space simulator multi-measuring point multiloop is realized, greatly improves temperature control in experiment
Effect, reduces test operation difficulty.
Although giving detailed description and explanation to the embodiment of patent of the present invention above, it should be noted that
It is that we can carry out various equivalent changes and modification according to the conception of patent of the present invention to the above embodiment, produced by it
Function still covered without departing from specification and attached drawing spirit when, should all be within the protection domain of patent of the present invention.
Claims (16)
- It is 1. mainly single by center control suitable for the multiloop temperature concurrent control system of multi-measuring point of operation under vacuum conditions Member, temperature collecting cell, distributed control temperature unit composition；Wherein, the central control unit：Including man-machine interaction unit, condition monitoring unit, central control interface unit, data Storage unit, the multiloop parallel temperature-controlling system user of multi-measuring point that the man-machine interaction unit is used under vacuum low-temperature environment refer to Order input and system operation information and equipment state tabular Graphical output；Condition monitoring unit is used to monitor in real time whole The communication state of system, instrument operating status, are periodically controlled by central control interface unit to temperature collecting cell and distribution Warm unit sends instruction, carries out power state detection and data acquisition instrument state-detection, and receive corresponding detection information, be System communication state, instrument operating status, system mode judgement, identifying system abnormal conditions and overload alarm feelings are carried out according to information Condition, and will judge that result is sent to human-machine interface unit, carry out system monitoring state real-time display and abnormal alarm；The temperature collecting cell, including temperature acquisition interface unit, data acquisition unit, acquisition state detection unit；Data All passages of collecting unit are parallel acquisition, i.e., each passage is provided with corresponding AD conversion module, is carried out at the same time data Collection；The distribution control temperature unit, including distributed temperature control interface unit, power control unit, temperature control state detection unit, Distributed temperature control interface unit is used to receiving control instruction transmitted by central control interface unit, and by distributed control temperature unit The system operation information that is gathered, status information of equipment, control procedural information etc. are sent to central control unit, while for connecing The real time temperature data that the temperature collecting cell collection of shrinkage temperature data transmission unit transmission calculates, and pass data to power supply Control unit, carries out corresponding power supply control.
- 2. temperature concurrent control system as claimed in claim 1, wherein, the instruction of user instruction input is opened including data acquisition Dynamic instruction, temperature control enabled instruction, data acquisition parameters setting, sensor parameters setting, control loop parameter setting, alarm limit are set It is fixed.
- 3. temperature concurrent control system as claimed in claim 1, wherein, system operation information and equipment state tabular figure Change output include data acquisition parameters, control loop parameter, sensor temperature data, power supply control data, system monitoring state, Real time temperature data and curves.
- 4. temperature concurrent control system as claimed in claim 1, wherein, it is defeated that system exception includes power supply communication failure, power supply Be out of order, data acquisition instrument communication failure, data acquisition instrument collection failure, sensor failure, heating circuit short circuit, heating Loop open circuit.
- 5. temperature concurrent control system as claimed in claim 1, wherein, overload alarm situation includes temperature over-range, electric current surpasses Limit, warming and cooling rate transfinite.
- 6. temperature concurrent control system as claimed in claim 1, wherein, data storage cell is set according to man-machine interaction unit Data memory format and store path, periodically maintain system data.
- 7. temperature concurrent control system as claimed in claim 1, wherein, temperature acquisition interface unit is used to receive central control Control instruction transmitted by interface unit, and system operation information, status information of equipment, the temperature that temperature collecting cell is gathered The information of degrees of data is sent to central control unit, while is adopted for transmitting data acquisition unit to distributed temperature control interface unit Collect the temperature data calculated.
- 8. temperature concurrent control system as claimed in claim 1, wherein, data acquisition unit drives including data acquisition instrument Unit, parallel drive unit, sensor fitting unit, device longevity unit；Wherein data acquisition instrument driving unit obtains user's input of acquisition instructions, data acquisition parameters from man-machine interaction unit Instruction, according to command adapted thereto and parameter, driving data acquisition instrument carries out the data acquisition of respective channel and respective type, there is provided Sensor measures initial data, and data message is sent to sensor fitting unit；Parallel drive unit realizes different data acquisition instrument concurrent working, different passage measuring points are adopted by hardware synchronization module Collection time error is less than 20ms, ensures the synchronism of data acquisition, the validity of temperature data；Sensor fitting unit obtains sensor parameters information according to from man-machine interaction unit, by data acquisition instrument driving unit The sensor measurement initial data of collection, by corresponding the Fitting Calculation, is converted into temperature data；Each passage accumulation access times of each instrument of device longevity unit record and Cumulative Elapsed Time, when accumulation access times and tire out The plot operation time reaches working service threshold values, which can send maintenance and be prompted with detection, and will send information to condition monitoring Unit, prompts user to carry out corresponding maintenance program.
- 9. temperature concurrent control system as claimed in claim 1, wherein, the collection of acquisition state detection unit timing detection temperature The operating status of unit, and condition monitoring unit is sent data to, carry out corresponding judgement processing.
- 10. temperature concurrent control system as claimed in claim 9, wherein, the operating status is transported including data acquisition instrument Row state, communication state, working sensor state.
- 11. temperature concurrent control system as claimed in claim 1, wherein, power control unit includes power source drive unit, ginseng Number adjusts unit, control strategy unit, parallel drive unit, power source life unit；Wherein power source drive unit obtains control instruction from man-machine interaction unit, is exported according to the power supply of control strategy unit requirement Parameter, the electric current and voltage output of power supply are controlled by stored program control system；Parameter tuning unit needs the control loop of parameter tuning by man-machine interaction unit selection, is calculated according to parameter self-tuning Method, carries out PID or PI controlling strategy parameter Self-tuning Systems, and after tuning process, the parameter after adjusting is returned to human-computer interaction Unit is exported；Control strategy unit obtains control parameter and default control strategy from man-machine interaction unit, anti-according to temperature collecting cell The temperature information for presenting each temperature control circuit carries out temperature control；Parallel drive unit：Parallel drive scheduling is carried out to programmable power supply, ensures that the response speed of control instruction is less than 20ms；Every programmable power supply Cumulative Elapsed Time of power source life unit record, when Cumulative Elapsed Time reaches working service threshold values, The unit can send maintenance and be prompted with detection, and will send information to condition monitoring unit, prompt user to be safeguarded accordingly Program.
- 12. temperature concurrent control system as claimed in claim 1, wherein, the temperature control state detection unit timing detection point The operating status of cloth control temperature unit.
- 13. temperature concurrent control system as claimed in claim 1, wherein, the temperature control state detection unit is by testing result Timing is sent to central control unit by distributed temperature control interface unit, and detection information is judged in condition monitoring unit Processing, power supply and circuit real-time status are shown by interpersonal interactive unit.
- 14. temperature concurrent control system as claimed in claim 12, wherein, operating status include programmable power supply operating status, Communication state, heating circuit state.
- 15. temperature concurrent control system as claimed in claim 14, wherein, heating circuit state-detection is defeated in every power supply Current transformer is installed, voltage transmitter, 0-10V is converted to by power output signal, and accesses distributed temperature control list at outlet In the measurement module of member, by detecting electric power outputting current and voltage, power supply and loop state are detected.
- 16. such as claim 1-15 any one of them temperature concurrent control systems, wherein, in distributed control temperature unit controller In, open up 6 separate threads, 30 programmable power supplys in each power supply cabinet are evenly distributed in 6 threads and are carried out, i.e., it is each Thread has 5 programmable power supplys, and the separate unit power command corresponding time is 2-3ms, and it is 15ms that 5 programmable power supplys, which instruct the corresponding time,.
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