CN100446374C - A thermal protection method - Google Patents
A thermal protection method Download PDFInfo
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- CN100446374C CN100446374C CNB031473091A CN03147309A CN100446374C CN 100446374 C CN100446374 C CN 100446374C CN B031473091 A CNB031473091 A CN B031473091A CN 03147309 A CN03147309 A CN 03147309A CN 100446374 C CN100446374 C CN 100446374C
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Abstract
The present invention relates to an overtemperature protection method which comprises the following steps: a) after the temperature of a temperature monitoring point is read in a certain time interval, the current environment temperatures T1, T2, T3,......, Tn of a base station system are obtained; b) the duration time t1, t2, t3,......, tn of each temperature is counted according to the current environment temperatures T1, T2, T3,......, Tn; c) the high temperature duration time t is calculated by the following formula: t=A1*t1+A2*t2+A3*t3+...... +An*tn, wherein A1, A2, A3,......, a respectively represent a preset value; d) if the high temperature duration time t is higher than the preset threshold value, the base station system adopts protective measures; if the high temperature duration time t is lower than the preset threshold value, step a is continuously carried out. The present invention solves the disadvantage that in the prior art, the temperature and the temperature duration time are not fully considered, and provides an overtemperature protection method for a base station system adopting a heat accumulating process.
Description
Technical field
The present invention relates to heat dissipation technology, be specifically related to be used for a kind of method for excessive heating protection of base station system.
Background technology
In current electronic product, especially as the large scale electronic equipments such as base station equipment of mobile communication, owing to adopted large scale integrated circuit and powerful power amplifier, make the power consumption of general base station system be several kilowatts, big capacity base station system even reach myriawatt.So high power makes that the caloric value of equipment is very big, causes the ambient temperature of base station system very high, and for electronic product, temperature raises 10 ℃, and reliability of products is drop by half almost, therefore must use heat dissipation equipment just can make the base station system operate as normal.
But, just must consider to take to avoid causing device damage such as safeguard measures such as closing power amplifier and inaccessible business when heat dissipation equipment breaks down or the own local fault in base station etc. when causing the base station equipment internal temperature sharply to rise.As seen, how base station system being carried out overtemperature protection, is the problem that industry presses for solution.
General method for excessive heating protection is as follows in the prior art: at first set an overtemperature protection temperature spot, as 60 ℃; Read current ambient temperature from temperature detecting point then, if when this ambient temperature reaches 60 ℃, just take safeguard measure (as closing power amplifier and inaccessible professional) immediately.
Yet, above-mentioned prior art has only been considered the GPF (General Protection False method of temperature to base station equipment, also not comprehensive, it is 60 ℃ for example if establish the overtemperature protection temperature spot, if system is in 59 ℃ environment for a long time, base station system will influence very big to the useful life of base station system owing to do not take safeguard measure at this moment; And for example; for a certain reason; the ambient temperature of base station system inside rises to 60 ℃ with very fast speed; this moment, base station system will be taked safeguard measure immediately, yet because the ambient temperature rate of climb is too fast, the components and parts temperature in the base station system on the veneer is probably also within the normal working temperature scope; if take safeguard measure (as closing the base station) this moment immediately; then can interrupt normal service operation, influence user's use, there is no need fully.
Summary of the invention
The invention provides a kind of method for excessive heating protection, can not be comparatively comprehensively in the prior art and in time take the problem of overtemperature protection measure to solve.
For addressing the above problem, the present invention adopts following technical scheme:
A kind of method for excessive heating protection is characterized in that, the method includes the steps of:
Step 2, calculate high-temperature duration t by following formula,
T=A1*t1+A2*t2+A3*t3+......+An*tn, wherein A1, A2, A3 ..., An is predetermined value; If this high-temperature duration t surpasses the preset time threshold value, base station system is taked safeguard measure so, otherwise continues step 1.
Wherein, also further comprise in the described step 1: if this current ambient temperature surpasses predetermined temperature threshold, base station system is taked safeguard measure immediately.
Wherein, also further comprise in the described step 1: when this current ambient temperature was lower than predetermined temperature threshold, if its duration surpasses set point, then the high-temperature duration t in the step 2 restarted statistics.
Wherein, in the described step 1, according to this current ambient temperature T1, T2, T3 ..., Tn add up each temperature duration t1, t2, t3 ..., tn; Specifically be meant:
Step one by one, with ambient temperature T1, T2 in the base station system, T3 ..., Tn is divided into some shelves, all there is certain temperature difference between every adjacent shelves, if this current ambient temperature surpasses predetermined temperature threshold, base station system is taked safeguard measure immediately, if this current ambient temperature is lower than the duration of predetermined temperature threshold and surpasses set point, then the high-temperature duration t in the step 2 restarts statistics;
Wherein, in the described step 1, read the temperature of temperature detecting point every certain time interval after, obtain base station system current environmental temperature T1, T2, T3 ..., Tn; Specifically be meant: after reading the temperature of temperature detecting point in 30 minutes, obtain base station system current environmental temperature T1, T2, T3 ..., Tn.
Wherein, in the described step 1, according to this current ambient temperature T1, T2, T3 ..., Tn add up each temperature duration t1, t2, t3 ..., tn; Specifically be meant:
Step one by one, should current ambient temperature T1, T2, T3 ..., Tn is divided into 5 grades, per 5 ℃ one grade, if this current ambient temperature is above 80 ℃, base station system is taked safeguard measure immediately, if this current ambient temperature was lower than 55 ℃ time above 120 minutes, then the high-temperature duration t in the step 2 restarts statistics;
Wherein, in the described step 2, calculate high-temperature duration t by following formula, t=A1*t1+A2*t2+A3*t3+......+An*tn, wherein A1, A2, A3 ..., An is predetermined value; Specifically be meant: calculate high-temperature duration t, t=t1+2*t2+8*t3+16*t4+48*t5 by following formula.
Wherein, in the described step 2, if this high-temperature duration t surpasses the preset time threshold value, base station system is taked safeguard measure so, specifically is meant: if this high-temperature duration t surpasses 96 hours, base station system is taked safeguard measure so.
The present invention is by considering the overtemperature protection of base station system from two dimensions (time that temperature, temperature continued), this overtemperature protection is the process of an accumulation of heat.It is compared with traditional method for excessive heating protection has following advantage:
1, to the base station system long-term work a little less than the overtemperature protection temperature spot, GPF (General Protection False is inoperative, can have a strong impact on the life-span of base station like this, utilizes the present invention can play real protective effect.
2, because certain cause specific makes the temperature of inside of base station reach the overtemperature protection temperature spot with very fast speed; the temperature of chip is also within normal range of operation at this moment; utilize the GPF (General Protection False method; system will take safeguard measure; and there is no need to protect in fact at all; the present invention can overcome the deficiency of prior art this respect, and this point is particularly important for this continual communication system of base station system, because power amplifier and inaccessible user can not at will be closed in the base station.
Introduce the present invention in detail below in conjunction with description of drawings and specific implementation.
Description of drawings
Fig. 1 is the structural representation of the base station system of the embodiment of the invention;
Fig. 2 is the method flow diagram of the embodiment of the invention;
Fig. 3 is the weight coordinate schematic diagram of each temperature section of the embodiment of the invention.
Specific implementation
For the clear structure of the present invention of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:
The structural representation of the base station system of the embodiment of the invention as shown in Figure 1, this base station system WCDMA NodeB is made up of three parts: Base-Band Processing part 12, Radio frequency Processing Unit, RF Processing Unit 13, power amplifier part 14.The Base-Band Processing part 12 of this product and Radio frequency Processing Unit, RF Processing Unit 13 shared cooling systems, at an upper portion thereof, be that air outlet 11 has fan to carry out forced air cooling, it below Radio frequency Processing Unit, RF Processing Unit 13 air inlet 15 of cooling system, air inlet 15 is furnished with 3 digital temperature sensors 17, intake air temperature is used as the residing ambient temperature of equipment here.The signal of this digital temperature sensor 17 is guided to monitoring veneer 16, is to handle like this on monitoring veneer 16:
Because digital temperature sensor has only the digital signal line of a Transistor-Transistor Logic level, on monitoring veneer 16, the signal of three air inlet digital temperature sensors 17 is guided on the EPLD of monitoring veneer 16, between the CPU of the EPLD of monitoring veneer 16 and monitoring veneer 16 cpu i/f is arranged, this cpu i/f includes 8 bit address, 8 bit data and control signal etc., and the effect of EPLD logic is that the signal with digital temperature sensor 17 is converted into the register value that CPU can read and write.EPLD is that what how to change is not emphasis of the present invention, is not described here.
Generally in a communication system, (mainly be meant single rack) and comprise a plurality of interpolation frames, be inserted with the circuit board of some in each interpolation frame again.For communication system generally all is to force heat radiation by fan, air inlet and air outlet at fan are arranged the temperature sensor of some, wherein the temperature of air inlet and actual environment temperature are approaching, therefore can think that the temperature of this air inlet is exactly an ambient temperature.Overtemperature protection generally is exactly that ambient temperature is set a value in the prior art, and as 60 ℃, this just protects base station system when ambient temperature reaches 60 ℃ immediately, as closes business, closing device etc.
Air inlet at fan is arranged 3 digital temperature sensors, mainly be to consider from the reliability angle, under normal circumstances intake air temperature is the mean value of 3 digital temperature sensors, when if one of them digital temperature sensor damages, then intake air temperature is the average of two good digital temperature sensors, if 3 digital temperature sensors all damage then fan full speed running.
Suppose 0～45 ℃ of the normal operation circumstances temperature range of base station equipment in the embodiment of the invention, maximal work ambient temperature-10～0 ℃, 45～55 ℃.Under Normal Environmental Temperature, require the base station system can operate as normal; For the maximal work ambient temperature, power amplifier wants derate to use, according to BellCore (North America communication equipment protective standard) GR-63:(R4-6) in regulation, under the maximal work ambient temperature, require the equipment continuous operating time must not be above 96 hours.
Specifically describe the particular content of the embodiment of the invention below:
The first, after certain time interval reads the temperature of temperature detecting point, obtain base station system current environmental temperature T1, T2, T3 ..., Tn;
Base station system at first read the signal of 3 digital temperature sensors 17 every 30 minutes by monitoring veneer 16, secondly by the EPLD on the monitoring veneer 16 signal of digital temperature sensor 17 is converted into the register value that CPU can read and write, determine ambient temperature then, the temperature value of three digital temperature sensors 17 is compared in twos, if its difference is within allowed band, be assumed to 2 ℃ as present embodiment, the mean value of then getting three temperature values is as ambient temperature, if two temperature values of one of them temperature value and other are arranged to be compared than difference greater than 2 ℃, then this temperature value is rejected, the mean value of getting other two temperature values is as ambient temperature, if the difference of three temperature values is all greater than 2 ℃, then explanation has at least two temperature sensors to damage, and then fan is operated in full-speed state.
The second, according to this current ambient temperature T1, T2, T3 ..., Tn add up each temperature duration t1, t2, t3 ..., tn;
Specifically it comprise following step:
1, should current ambient temperature T1, T2, T3 ..., Tn is divided into 5 grades, per 5 ℃ one grade, if this current ambient temperature is above 80 ℃, base station system is taked safeguard measure immediately, if this current ambient temperature was lower than 55 ℃ time above 120 minutes, then the high-temperature duration t in the step 2 restarts statistics;
2, according to this current ambient temperature T1, T2, T3 ..., Tn adds up duration t1, t2, t3, t4, the t5 of these 5 grades of temperature;
Because heat Calculation is very complicated, and be non-linear, present embodiment is rule of thumb simplified, be set in (T is a current environmental temperature) between ℃ temperature of 55 ℃≤T＜60, the heat that the 96 hours base station isolated operation time (getting with reference to the BellCore standard in these 96 hours) sends, equal 48 hours ℃ base station isolated operation time caloric value in 60 ℃≤T＜65, equal 12 hours caloric value of base station isolated operation between ℃ temperature of 65 ℃≤T＜70, equal 70 ℃≤T＜75, the caloric value of 6 hours ℃ base station isolated operation time, equal the caloric value of 75 ℃≤T＜2 hours 80 base station isolated operation times.Can derive thus, in the weight of each time of different temperatures section, the weight of establishing 55 ℃≤T＜60 ℃ is 1, then 60 ℃≤T＜65 ℃ weight is that 2,65 ℃≤T＜70 ℃ weight is that 8,70 ℃≤T＜75 ℃ weight is 16,75 ℃≤T＜80 ℃ weights are 48, see also shown in Figure 3.
More than set, it all is the time of considering single temperature range operation, but concerning real base station, its variations in temperature is a progressive formation, as temperature is 68 ℃, and it has passed through 55 ℃≤T＜60 ℃ in fact, 60 ℃≤T＜65 ℃, 65 ℃≤T＜70 ℃ three segments, different in each interval time that continues.The time that total like this high temperature continues is for each temperature range duration is multiplied by addition after the corresponding weights.
Three, calculate high-temperature duration t by following formula,
T=A1*t1+A2*t2+A3*t3+......+An*tn, wherein A1, A2, A3 ..., An is predetermined value;
If 55 ℃≤T＜60 ℃ duration is t1, if 60 ℃≤T＜65 ℃ duration is t2, if 65 ℃≤T＜70 ℃ duration is t3, if 70 ℃≤T＜75 ℃ duration is t4, if 75 ℃≤T＜80 ℃ duration is t5, draw following formula according to the relation in the step 2:
t＝t1+2*t2+8*t3+16*t4+48*t5
Wherein, t is a high-temperature duration.
If the 4th this high-temperature duration t surpasses predetermined threshold value, base station system is taked safeguard measure so, otherwise continues step a.
When t 〉=96 hour, base station system treat judges that the base station is overheated, then takes safeguard measure, with all professional Close Alls, just can take safeguard measure, as close power amplifier and inaccessible user;
When t＜96 hour, base station system treat judges that the base station is not in superheat state, continues step 1.
The embodiment of the invention is compared with traditional method for excessive heating protection has following advantage:
1, during a shade below the high temperature protection set point, system does not do any measure to the traditional protection method in long-time temperature, and life-span, the reliability effect to system is very big like this, and the embodiment of the invention can head it off.
2, if the system environments temperature rises to the protection set point with very fast speed; this moment, system just protected at once; in fact because the rate of climb is too fast; the components and parts temperature of internal system is probably also within the normal working temperature scope; this uninterrupted system of shutdown system object communication system this moment is fatal, and the embodiment of the invention can head it off.
Claims (8)
1, a kind of method for excessive heating protection is characterized in that, the method includes the steps of:
Step 1, read the temperature of temperature detecting point every certain time interval after, obtain base station system current environmental temperature T1, T2, T3 ..., Tn; According to this current ambient temperature T1, T2, T3 ..., Tn add up each temperature duration t1, t2, t3 ..., tn;
Step 2, calculate high-temperature duration t by following formula,
T=A1*t1+A2*t2+A3*t3+......+An*tn, wherein A1, A2, A3 ..., An is predetermined value; If this high-temperature duration t surpasses the preset time threshold value, base station system is taked safeguard measure so, otherwise continues step 1.
2, a kind of method for excessive heating protection as claimed in claim 1 wherein, also further comprises in the described step 1: if this current ambient temperature surpasses predetermined temperature threshold, base station system is taked safeguard measure immediately.
3, a kind of method for excessive heating protection as claimed in claim 1; wherein; also further comprise in the described step 1: when this current ambient temperature was lower than predetermined temperature threshold, if its duration surpasses set point, then the high-temperature duration t in the step 2 restarted statistics.
4, a kind of method for excessive heating protection as claimed in claim 1, wherein, in the described step 1, according to this current ambient temperature T1, T2, T3 ..., Tn add up each temperature duration t1, t2, t3 ..., tn; Specifically be meant:
Step one by one, with ambient temperature T1, T2 in the base station system, T3 ..., Tn is divided into some shelves, all there is certain temperature difference between every adjacent shelves, if this current ambient temperature surpasses predetermined temperature threshold, base station system is taked safeguard measure immediately, if this current ambient temperature is lower than the duration of predetermined temperature threshold and surpasses set point, then the high-temperature duration t in the step 2 restarts statistics;
Step 1 two, according to this current ambient temperature T1, T2, T3 ..., duration t1, the t2 of some grades of temperature of Tn statistics ..., tm, wherein m is grade numbers.
5, a kind of method for excessive heating protection as claimed in claim 1, wherein,
In the described step 1, read the temperature of temperature detecting point every certain time interval after, obtain base station system current environmental temperature T1, T2, T3 ..., Tn; Specifically be meant: after reading the temperature of temperature detecting point in 30 minutes, obtain base station system current environmental temperature T1, T2, T3 ..., Tn.
6, a kind of method for excessive heating protection as claimed in claim 1, wherein,
In the described step 1, according to this current ambient temperature T1, T2, T3 ..., Tn add up each temperature duration t1, t2, t3 ..., tn; Specifically be meant:
Step one by one, should current ambient temperature T1, T2, T3 ..., Tn is divided into 5 grades, per 5 ℃ one grade, if this current ambient temperature is above 80 ℃, base station system is taked safeguard measure immediately, if this current ambient temperature was lower than 55 ℃ time above 120 minutes, then the high-temperature duration t in the step 2 restarts statistics;
Step 1 two, according to this current ambient temperature T1, T2, T3 ..., Tn adds up duration t1, t2, t3, t4, the t5 of 5 grades of temperature.
7, a kind of method for excessive heating protection as claimed in claim 1, wherein,
In the described step 2, calculate high-temperature duration t by following formula, t=A1*t1+A2*t2+A3*t3+......+An*tn, wherein A1, A2, A3 ..., An is predetermined value; Specifically be meant: get A1 and be 1, A2 is 2, A3 is 8, A4 is 16, A5 is 48, calculates high-temperature duration t, t=t1+2*t2+8*t3+16*t4+48*t5 by following formula.
8, a kind of method for excessive heating protection as claimed in claim 1, wherein,
In the described step 2, if this high-temperature duration t surpasses the preset time threshold value, base station system is taked safeguard measure so, specifically is meant: if this high-temperature duration t surpasses 96 hours, base station system is taked safeguard measure so.
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| CNB031473091A CN100446374C (en) | 2003-07-05 | 2003-07-05 | A thermal protection method |
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| CNB031473091A CN100446374C (en) | 2003-07-05 | 2003-07-05 | A thermal protection method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101431228B (en) | 2008-12-18 | 2010-10-27 | 华为终端有限公司 | Thermal protection control method and system |
| CN101998448A (en) * | 2009-08-11 | 2011-03-30 | 华为终端有限公司 | Flow control method, device and terminal |
| CN106788358B (en) * | 2017-01-12 | 2020-10-09 | 佛山市顺德区美的电热电器制造有限公司 | IGBT overheating protection method and device and electrical equipment |
| CN107015582A (en) * | 2017-03-09 | 2017-08-04 | 九阳股份有限公司 | A kind of determination methods of soy bean milk making machine wiring board overheat |
| PL3661274T3 (en) * | 2017-08-09 | 2023-10-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Overheating protection method and device of user equipment, user equipment and base station |
| CN107978959B (en) * | 2017-12-18 | 2019-09-20 | 深圳市创鑫激光股份有限公司 | Laser and its control method and storage medium |
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| US5099379A (en) * | 1990-07-31 | 1992-03-24 | Gold Star Co., Ltd. | Surge preventing circuit for electromagnetic induction cooking apparatus |
| CN1178406A (en) * | 1996-07-25 | 1998-04-08 | 科乐美股份有限公司 | Semiconductor integrated circuit device with overheating protector and method of protecting semiconductor integrated circuit against overheating |
| US5875414A (en) * | 1996-02-21 | 1999-02-23 | Kabushiki Kaisha Meidensha | Method and apparatus for protecting switching element of inverter from being overheated |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099379A (en) * | 1990-07-31 | 1992-03-24 | Gold Star Co., Ltd. | Surge preventing circuit for electromagnetic induction cooking apparatus |
| US5875414A (en) * | 1996-02-21 | 1999-02-23 | Kabushiki Kaisha Meidensha | Method and apparatus for protecting switching element of inverter from being overheated |
| CN1178406A (en) * | 1996-07-25 | 1998-04-08 | 科乐美股份有限公司 | Semiconductor integrated circuit device with overheating protector and method of protecting semiconductor integrated circuit against overheating |
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