CN104062991A - Temperature hysteresis control method used for high-temperature aging test - Google Patents
Temperature hysteresis control method used for high-temperature aging test Download PDFInfo
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- CN104062991A CN104062991A CN201410265971.9A CN201410265971A CN104062991A CN 104062991 A CN104062991 A CN 104062991A CN 201410265971 A CN201410265971 A CN 201410265971A CN 104062991 A CN104062991 A CN 104062991A
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Abstract
The invention provides a temperature hysteresis control method used for a high-temperature aging test. A monitoring terminal conducts temperature curve control according to temperature and time constant values set by a high-temperature aging test scheme to enable real-time temperature to be consistent to a temperature curve. Specifically, the monitoring terminal collects the real-time temperature of a high-temperature aging room, the real-time temperature is compared with constant-value temperature of the temperature curve, a control signal is sent to the high-temperature aging room according to the comparison result, and the temperature of the high-temperature aging room is adjusted so as to enable the real-time temperature to be consistent to the temperature curve. According to the temperature hysteresis control method used for the high-temperature aging test, the stability of the temperature curve can be effectively controlled, meanwhile, a dead zone can be set as a constant value, and the requirements for the temperature fluctuation range of different application occasions are met.
Description
Technical field
The present invention relates to for domain of control temperature, be particularly useful for the temperature-controlled process of high-temperature aging room.
Background technology
The temperature control of existing high-temperature aging room adopts the method for Control multichannel heating tube to realize.Such advantage is that input cost is low, practical simple and reliable.
Current heating tube control method is: when heating process temperature rises to a certain setting value, reduce by a road heating tube, while rising to again certain certain value, reduce again by a road heating tube, by that analogy, similarly temperature decline process, when temperature drops to a certain temperature, increase by a road heating tube; As temperature continues to decline, while dropping to another one definite value, then increase by a road heating tube.
The shortcoming of prior art is,
Temperature is subject to after the interference of extraneous factor, shakes more violently, and whole process temperature coefficient of variation is larger; The problem that another one is serious is: when temperature reaches setting value, because drift and the reaction time of temperature are slower, there will be at a certain temperature value relay and ceaselessly shake and saltus step back and forth.The contact of working relay is due to the arcing that shake causes for a long time, and making to get an electric shock burns out or resistance increase, and greatly reduce serviceable life.
Summary of the invention
The invention provides a kind of temperature hysteresis control method for high temperature ageing, solve relay flutter and saltus step problem back and forth that temperature occurs at certain certain value point, make temperature controlled fluctuation in a scope trusty.
The temperature hysteresis control method of a kind of high-temperature circulation test provided by the invention, it is characterized in that, monitor terminal carries out temperature curve control according to the temperature of high-temperature circulation test scheme setting and time definite value real time temperature and temperature curve is consistent, specifically refer to, monitor terminal gathers the real time temperature of high-temperature aging room, by the definite value temperature comparison of described real time temperature and described temperature curve, transmit control signal to described high-temperature aging room according to comparative result, adjust the temperature of described high-temperature aging room, real time temperature and described temperature curve are consistent.
Aforesaid method, it is characterized in that, make the temperature of described high-temperature aging room keep consistent with described temperature curve, specifically refer to: in every one-phase of temperature curve, make real time temperature reach the definite value temperature of described temperature curve in this stage, and in this phases-time definite value, maintain in the upper and lower allowed band of this definite value temperature.
Aforesaid method, is characterized in that, by regulating heating tube power stage, adjusts the temperature of described high-temperature aging room.
Aforesaid method, is characterized in that, also comprises step before described monitor terminal carries out temperature curve control: monitor terminal sends circulating fan startup command; After blower fan to be recycled is opened, heating circuit is started working.
Aforesaid method, it is characterized in that, in each stage of described temperature curve, make real time temperature reach the definite value temperature of described temperature curve in this stage, and in this phases-time, maintain in the upper and lower allowed band of this definite value temperature, specifically refer to: carry out effective control of temperature according to temperature hysteresis control method, in the time that described real time temperature is in the scope of dead band threshold value, temperature control strategy does not make and changes; When described real time temperature is during lower than the lowest temperature definite value in this stage, transmit control signal and open first order heating to described high-temperature aging room; When described real time temperature adds dead band threshold values higher than the lowest temperature definite value in this stage, and when being less than upper temperature limit definite value and deducting dead band threshold values, transmit control signal and open second level heating to described high-temperature aging room; When described real time temperature is during higher than the upper temperature limit definite value in this stage, transmit control signal and open the third level or do not heat to described high-temperature aging room; When described real time temperature is lowered the temperature definite value higher than air draft, transmit control signal and start exhaust fan air draft cooling to described high-temperature aging room.
Aforesaid method, is characterized in that, also comprises step, in the time that monitor terminal collects real time temperature, described real time temperature is presented on screen, or is sent to backstage demonstration.
Aforesaid method, it is characterized in that, also comprise definite value setting steps, be used for arranging described temperature and time definite value, comprise temperature definite value, lowest temperature definite value, upper temperature limit definite value, the time definite value in air draft cooling definite value, dead band threshold value and each stage in each stage.
Temperature hysteresis control method for high temperature ageing provided by the present invention, can effectively control temperature curve settles out in two little rings as in Fig. 1 or large ring, dead band can be used as definite value setting simultaneously, meets the requirement of different application occasion temperature fluctuation range.Practical effect has been verified the phenomenon that has effectively prevented the shake of relay and become at a certain temperature spot beating heart in addition.Extend the serviceable life of relay.This method is simple and reliable, and input cost is low, and practicality is stronger.
Brief description of the drawings
Fig. 1 is heating control circuit principle of compositionality;
Fig. 2 is that the control of temperature hysteresis curved line arithmetic realizes principle;
Fig. 3 is high temperature ageing one key test temperature control flow chart.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Heating control circuit principle of compositionality as shown in Figure 1, comprise circulating fan 101, exhaust blower 102, heating tube 103, pilot relay 104, heating circuit adopts distributed arrangement's mode according to the space size of high-temperature aging room, each distributed areas are made up of two groups of heating tubes and a circulating fan, and each region is placed with a temperature sensor, gather the temperature value of one's respective area.The independence that intelligent monitoring terminal carries out temperature to each region is controlled automatically, realizes the homogeneity of regional temperature in high-temperature aging room.
Intelligent monitoring terminal is as the unit controls core of high temperature ageing intelligent monitor system, is responsible for collecting temperature information, controls heating control circuit according to high-temperature circulation test temperature curve definite value, detailed process as shown in Figure 3:
First, the intelligent monitoring terminal start that powers on, enters definite value interface is set, check the definite value parameter that needs setting, definite value setting comprises temperature definite value and the time definite value of multiple high-temperature circulation test scheme, as the temperature and time definite value of constant temperature scheme, and the temperature and time definite value of alternating temperature scheme.The definite value of alternating temperature scheme comprises temperature definite value T1, lowest temperature definite value A1, upper temperature limit definite value B1, air draft cooling definite value C1, the time definite value t1 of first stage; Temperature definite value T2, the lowest temperature definite value A2 of subordinate phase, upper temperature limit definite value B2, air draft cooling definite value C2, time definite value t2; Temperature definite value Tn, lowest temperature definite value An, upper temperature limit definite value Bn, air draft cooling definite value Cn, time definite value tn and the dead band definite value Δ T of the last stage.Definite value needs after setting to preserve, and next time, same scheme process can reset again.
After definite value is set, just can carry out a key and trigger high-temperature circulation test.First monitor terminal sends circulating fan startup command; Further, after blower fan to be recycled is opened, heating circuit is started working; Further, described monitor terminal carries out temperature curve control according to the temperature of high-temperature circulation test scheme setting and time definite value, detailed process is as follows, monitor terminal gathers the real time temperature of high-temperature aging room, regulate heating control loop power stage according to the definite value temperature of each period temperature curve, make the real time temperature of first stage reach the definite value temperature T 1 of first stage, and maintain the maintenance t1 time in the upper and lower allowed band of definite value temperature; The real time temperature of subordinate phase reaches the definite value temperature T 2 of subordinate phase, and maintains the maintenance t2 time in the upper and lower allowed band of definite value temperature; Until the last stage definite value temperature T n setting finishes.
Adopt temperature hysteresis curved line arithmetic as shown in Figure 2 to carry out effective control of temperature in temperature controlled each stage.Realize temperature hysteresis control by the method for introducing dead band definite value, set a dead band definite value Δ T, temperature is in the scope in dead band, and temperature control strategy does not make any change, only outside dead band, control strategy just can make corresponding change, as relay adhesive and shutoff;
Concrete logical algorithm is as follows: when real time temperature is during lower than the lower-limit temperature value A of this period, transmit control signal and open first order heating to described high-temperature aging room, for example two groups of heating tubes heat simultaneously; When real time temperature adds dead band temperature threshold values higher than lower limit temperature, and when being less than ceiling temperature and deducting dead band temperature threshold values, transmit control signal and open second level heating to described high-temperature aging room, for example, only have one group of heating tube heating; When real time temperature is during higher than the ceiling temperature value B of this period, transmit control signal and open third level heating or do not heat to described high-temperature aging room, for example two groups of heating tubes do not heat; When real time temperature is lowered the temperature definite value higher than air draft, start exhaust fan air draft cooling;
In (A, A+ Δ T), (B, B+ Δ T) two dead zone ranges, control strategy does not do any variation, keeps previous state constant.The existence in dead band has realized temperature in the time of any operation valve value, and control program can not continuously change
Monitor terminal is presented at the monitor message of process of the test on the graph lcd module of liquid crystal plug-in unit in real time by RS232 serial ports in addition; Simultaneously by monitor message by delivering to the backstage of duty room and Control Room in 61850 agreements, realize and control platform and duty room and all can carry out the monitoring of temperature.
Claims (7)
1. the temperature hysteresis control method for high-temperature circulation test, it is characterized in that, monitor terminal carries out temperature curve control according to the temperature of high-temperature circulation test scheme setting and time definite value real time temperature and temperature curve is consistent, specifically refer to, monitor terminal gathers the real time temperature of high-temperature aging room, by the definite value temperature comparison of described real time temperature and described temperature curve, transmit control signal to described high-temperature aging room according to comparative result, adjust the temperature of described high-temperature aging room, real time temperature and described temperature curve are consistent.
2. the method for claim 1, it is characterized in that, make the temperature of described high-temperature aging room keep consistent with described temperature curve, specifically refer to: in every one-phase of temperature curve, make real time temperature reach the definite value temperature of described temperature curve in this stage, and in this phases-time definite value, maintain in the upper and lower allowed band of this definite value temperature.
3. the method for claim 1, is characterized in that, by regulating heating tube power stage, adjusts the temperature of described high-temperature aging room.
4. the method for claim 1, is characterized in that, also comprises step before described monitor terminal carries out temperature curve control: monitor terminal sends circulating fan startup command; After blower fan to be recycled is opened, heating circuit is started working.
5. method as claimed in claim 2, it is characterized in that, in each stage of described temperature curve, make real time temperature reach the definite value temperature of described temperature curve in this stage, and in this phases-time, maintain in the upper and lower allowed band of this definite value temperature, specifically refer to: carry out effective control of temperature according to temperature hysteresis control method, in the time that described real time temperature is in the scope of dead band threshold value, temperature control strategy does not make and changes; When described real time temperature is during lower than the lowest temperature definite value in this stage, transmit control signal and open first order heating to described high-temperature aging room; When described real time temperature adds dead band threshold values higher than the lowest temperature definite value in this stage, and when being less than upper temperature limit definite value and deducting dead band threshold values, transmit control signal and open second level heating to described high-temperature aging room; When described real time temperature is during higher than the upper temperature limit definite value in this stage, transmit control signal and open the third level or do not heat to described high-temperature aging room; When described real time temperature is lowered the temperature definite value higher than air draft, transmit control signal and start exhaust fan air draft cooling to described high-temperature aging room.
6. the method for claim 1, is characterized in that, also comprises step, in the time that monitor terminal collects real time temperature, described real time temperature is presented on screen, or is sent to backstage demonstration.
7. the method for claim 1, it is characterized in that, also comprise definite value setting steps, be used for arranging described temperature and time definite value, comprise temperature definite value, lowest temperature definite value, upper temperature limit definite value, the time definite value in air draft cooling definite value, dead band threshold value and each stage in each stage.
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| CN201410265971.9A CN104062991A (en) | 2014-06-13 | 2014-06-13 | Temperature hysteresis control method used for high-temperature aging test |
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| CN201410265971.9A CN104062991A (en) | 2014-06-13 | 2014-06-13 | Temperature hysteresis control method used for high-temperature aging test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613414A (en) * | 2018-12-26 | 2019-04-12 | 山东阅芯电子科技有限公司 | The method and system of controllable hot environment aging life-span chamber temperature changing process |
| CN109613413A (en) * | 2018-12-26 | 2019-04-12 | 山东阅芯电子科技有限公司 | Increase the method and system of hot environment degradation test sample quantity |
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| JPH07253733A (en) * | 1994-03-14 | 1995-10-03 | Canon Inc | Image-forming device |
| CN1716140A (en) * | 2004-06-30 | 2006-01-04 | 华为技术有限公司 | Temperature control method and its device |
| CN201413456Y (en) * | 2009-05-27 | 2010-02-24 | 深圳市德泽能源科技有限公司 | Aging room intelligent control system circuit |
| CN102053636A (en) * | 2009-11-02 | 2011-05-11 | 西安中科麦特电子技术设备有限公司 | Multi-point temperature measuring and controlling system for aging room of electronic product |
| CN203630646U (en) * | 2013-11-30 | 2014-06-04 | 西安中科麦特电子技术设备有限公司 | Temperature control system for multiple direct-current power supply aging cabinet |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07253733A (en) * | 1994-03-14 | 1995-10-03 | Canon Inc | Image-forming device |
| CN1716140A (en) * | 2004-06-30 | 2006-01-04 | 华为技术有限公司 | Temperature control method and its device |
| CN201413456Y (en) * | 2009-05-27 | 2010-02-24 | 深圳市德泽能源科技有限公司 | Aging room intelligent control system circuit |
| CN102053636A (en) * | 2009-11-02 | 2011-05-11 | 西安中科麦特电子技术设备有限公司 | Multi-point temperature measuring and controlling system for aging room of electronic product |
| CN203630646U (en) * | 2013-11-30 | 2014-06-04 | 西安中科麦特电子技术设备有限公司 | Temperature control system for multiple direct-current power supply aging cabinet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109613414A (en) * | 2018-12-26 | 2019-04-12 | 山东阅芯电子科技有限公司 | The method and system of controllable hot environment aging life-span chamber temperature changing process |
| CN109613413A (en) * | 2018-12-26 | 2019-04-12 | 山东阅芯电子科技有限公司 | Increase the method and system of hot environment degradation test sample quantity |
| CN109613413B (en) * | 2018-12-26 | 2021-05-14 | 山东阅芯电子科技有限公司 | Method and system for increasing number of test samples of high-temperature environment aging test |
| CN109613414B (en) * | 2018-12-26 | 2021-06-25 | 山东阅芯电子科技有限公司 | Method and system capable of controlling temperature change process of aging life test box in high-temperature environment |
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Application publication date: 20140924 |