CN101349926A - Method and apparatus for adjusting fan rotary speed - Google Patents
Method and apparatus for adjusting fan rotary speed Download PDFInfo
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- CN101349926A CN101349926A CNA2008101196432A CN200810119643A CN101349926A CN 101349926 A CN101349926 A CN 101349926A CN A2008101196432 A CNA2008101196432 A CN A2008101196432A CN 200810119643 A CN200810119643 A CN 200810119643A CN 101349926 A CN101349926 A CN 101349926A
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Abstract
The invention provides a method for adjusting the rotation speed of fans and a device thereof. The method comprises: attaining the present temperature of the working parts; comparing the present temperature of the working part with the target temperature preset on a temperature curve of the working part to attain a temperature difference value; when the temperature different value is larger than the preset temperature, adjusting the rotation speed of the fan on the working part, or else, not adjusting the rotation speed. Therefore, the invention can reasonably judge the rotation speed adjustment of fans, avoid frequent speed adjustment for fans, improve the service life of fans and improve system performance.
Description
Technical field
The present invention relates to the fan speed-regulating field, relate in particular to a kind of method and device of adjusting rotation speed of the fan.
Background technology
At present, the heat dissipation design of server is more and more paid attention to by industry.After temperature reduced, the serviceability of server component can be higher, especially the performance of Guan Jian calculating unit CPU; Simultaneously, lower temperature also can promote the reduction of server system power consumption, and device power supply conversion efficiency at low temperatures also can improve.Concerning server fan, if there is not the fan speed-regulating technology, fan can only be operated in the following of maximum power dissipation or specific power consumption so, and such design is just totally unfavorable to the life-span of fan, and power consumption and the noise to system also has very big influence simultaneously.
Be illustrated in figure 1 as the fan speed-regulating curve of CPU in the prior art, among the figure: when the temperature of CPU during at Tcontrol-10～Tcontrol, fan is in the linear speed regulation zone, and above-mentioned Tcontrol is the temperature control value of CPU, is pre-set when dispatching from the factory by CPU manufacturer.According to above-mentioned speed governing curve, after periodically inquiring a plurality of cpu temperatures, the rotating speed that only need read correspondence in above-mentioned curve compares and gets final product, and the rotating speed with these a plurality of fans compares then, gets maximal value output wherein.
As can be seen from the above technical solutions, in the existing speed governing strategy, only come the rotating speed of input signal control fan by simple judgement, this will cause because judging point is too approaching and cause the frequent variation of rotation speed of the fan, reduced the life-span of fan, the performance of simultaneity factor also is affected.
Summary of the invention
Embodiment of the present invention technical matters to be solved is to provide a kind of method and device of adjusting rotation speed of the fan, can guarantee the speed governing that fan can be not frequent, makes the speed governing strategy more reasonable.
Embodiment of the present invention provides a kind of method of adjusting rotation speed of the fan, comprising:
Obtain the Current Temperatures of service part;
Preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in obtains temperature gap;
If described temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part.
Embodiment of the present invention also provides a kind of device of adjusting rotation speed of the fan, and described device comprises:
The temperature acquiring unit is used to obtain the Current Temperatures of service part;
The rotation speed of the fan adjustment unit is used for preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in, and according to more resulting temperature gap the rotation speed of the fan on the described service part is adjusted; Wherein, if more resulting temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part.
The Current Temperatures of service part at first is provided by the above-mentioned technical scheme that provides as can be seen; Preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in obtains temperature gap then; If described temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part; Otherwise, then the rotation speed of the fan on the described service part is not adjusted.So just can make the speed governing judgement of fan more reasonable, and guarantee the speed governing that fan can be not frequent, in the serviceable life of having improved fan simultaneously, improve system performance.
Description of drawings
Fig. 1 is the fan speed-regulating curve synoptic diagram of CPU in the prior art;
Fig. 2 is the schematic flow sheet of method that the specific embodiment of the invention provides;
Fig. 3 is another schematic flow sheet of method that the specific embodiment of the invention provides;
Fig. 4 is the speed governing curve synoptic diagram of the cpu fan of the specific embodiment of the invention;
Fig. 5 is the structural representation of specific embodiment of the invention institute generator.
Embodiment
Embodiment of the present invention provides a kind of method and device of adjusting rotation speed of the fan.At first obtain the Current Temperatures of service part; And then preset target temperature on the Current Temperatures of this service part and the described service part temperature curve of living in relatively, and the rotation speed of the fan on the described service part is adjusted according to more resulting temperature gap.Specifically, if more resulting temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on this service part; Otherwise, then the rotation speed of the fan on this service part is not adjusted.Here said preset temperature adjusted value can be set according to working as forefan strategy and environment for use.
In addition, above-mentioned fan speed-regulating curve can also be divided into temperature rising curve and temperature decline curve, specifically, can obtain the Current Temperatures of the service part on a plurality of time periods, temperature on the more adjacent then time period, know the temperature variations of this service part, and then judge the residing temperature curve of described service part, if the temperature of described service part raises, judge that then Current Temperatures is to be in rising edge, this moment, service part was in temperature rising curve, preset target temperature on the Current Temperatures of this service part and the temperature rising curve is relatively just adjusted the rotation speed of the fan on the described service part according to more resulting temperature gap then; If the temperature of described service part descends, judge that then Current Temperatures is to be in negative edge, this moment, service part was in the temperature decline curve, preset target temperature on Current Temperatures that just can more described service part and the temperature decline curve then, and according to more resulting temperature gap the rotation speed of the fan on the described service part is adjusted.
More than said temperature rising curve and temperature decline curve can be before carrying out fan speed-regulating, actual operating position and environment for use according to fan are pre-set, and the maximal value of curve, minimum value and the rate of rise also can be set adjustment according to actual needs.It should be noted that needs the interval that keeps certain between temperature decline curve and the temperature rising curve, so that follow-up rotating speed adjustment.
By such decision procedure, just can make the speed governing strategy more reasonable, and guarantee the speed governing that fan can be not frequent, in the serviceable life of having improved fan, improved system performance simultaneously.
For better describing embodiment of the present invention, now in conjunction with the accompanying drawings the specific embodiment of the present invention is described, be illustrated in figure 2 as the schematic flow sheet of method that embodiment of the present invention provides, described method comprises:
Step 21: the Current Temperatures that obtains service part.
Specifically, at first by the Current Temperatures of specific functional module testing parts, obtain the Current Temperatures of this service part.
In addition, here also can detect the Current Temperatures of the service part on a plurality of time periods by specific functional module, specifically can adopt the mode that periodically detects, also can adopt and regularly detect or carry out with the mode of machine testing, for example by obtain the temperature of the service part on a plurality of time periods with upper type, then just can be by the temperature value that compares current slot and obtained on the last time period, know the temperature variations of service part, promptly service part is in the temperature propradation or is in temperature decline state.
Step 22: preset target temperature on the Current Temperatures of comparison service part and the temperature curve.
Specifically, after the Current Temperatures that has obtained service part, just can compare preset target temperature on the Current Temperatures of service part and the temperature curve, and then operate accordingly according to comparative result.If more resulting temperature gap is greater than the preset temperature adjusted value, then execution in step 23; Otherwise then execution in step 24.Preset target temperature obtains according to the residing temperature curve of this service part on the temperature curve described here, specifically, can search temperature curve by the current rotation speed of the fan of this service part, obtain preset target temperature on the temperature curve, then just can be further relatively the Current Temperatures of this service part with the target temperature that is obtained.Wherein, the value of goal-selling temperature can be set according to the operating position and the environment for use of fan on this temperature curve.
In addition, above-described preset temperature adjusted value also is to set according to current fan speed-regulating strategy and actual environmental demand, can the design temperature adjusted value it be 5 degrees centigrade for example, that is to say when more resulting temperature gap during, just the rotation speed of the fan on this service part is adjusted greater than 5 degrees centigrade; Otherwise, if more resulting temperature gap in 5 degrees centigrade, is adjusted the rotation speed of the fan on the service part with regard to not needing.Such decision condition just can be avoided the frequent speed governing of fan, in the serviceable life of having improved fan, has improved system performance.
Step 23: the rotation speed of the fan on this service part is adjusted.
Specifically, can adjust the pulse width modulation (PWM) value according to the degree that this service part temperature rises or descends, make the rotation speed of the fan of described service part increase accordingly or reduce, here temperature rising or the degree that descends can be linear with the pulse width modulation (PWM) value that increases or reduce, and also can set particular point according to the demand of reality.
For instance, if the temperature of service part rises, then can the every rising of design temperature once just need the corresponding PWM of increasing value 6%, rotation speed of the fan is corresponding to increase by 5% thereby make; Otherwise,, then can the every decline of design temperature once just need the corresponding PWM of minimizing value 6%, thereby make rotation speed of the fan reduce 5% accordingly if the temperature of service part descends.
Step 24: the rotation speed of the fan on this service part is not adjusted.
By the enforcement of above technical scheme, it is more reasonable that the speed governing of fan is judged, and guarantee the speed governing that fan can be not frequent, in the serviceable life of having improved fan, improved the performance of system simultaneously.
In addition, can also be in the temperature propradation or be in temperature decline state, temperature curve is divided into temperature rising curve and temperature decline curve according to service part.Be illustrated in figure 3 as another schematic flow sheet of method that the specific embodiment of the invention provides, described method comprises:
Step 31: the temperature of knowing the service part on a plurality of time periods.
Specifically, can adopt periodically and detect, regularly detect or obtain the temperature of the service part on a plurality of time periods with the mode of machine testing, execution in step 32 then.
Step 32: the temperature value that compares current slot and obtained on the last time period.
If the temperature of described service part raises, judge that then this moment, service part was in temperature rising curve, this moment is in execution in step 33; If the temperature of described service part descends, judge that then this moment, service part was in the temperature decline curve, and then execution in step 34.
Step 33: preset target temperature on the Current Temperatures of this service part and the temperature rising curve relatively, judge that whether temperature gap is greater than the preset temperature adjusted value.
Specifically, greater than the preset temperature adjusted value, then execution in step 331, promptly the rotation speed of the fan on this service part adjusted as if more resulting temperature gap, and specifically adjustment mode sees that above step 23 is described; Otherwise then execution in step 332, promptly the rotation speed of the fan on the described service part do not adjusted.
Step 34: preset target temperature on the Current Temperatures of this service part and the temperature decline curve relatively, judge that whether temperature gap is greater than the preset temperature adjusted value.
Specifically, greater than the preset temperature adjusted value, then execution in step 341, promptly the rotation speed of the fan on this service part adjusted as if more resulting temperature gap, and specifically adjustment mode sees that above step 23 is described; Otherwise then execution in step 342, promptly the rotation speed of the fan on the described service part do not adjusted.
It should be noted that, more than have difference between the preset target temperature on preset target temperature on the temperature rising curve and the temperature decline curve, that is to say under same rotation speed of the fan, goal-selling temperature on the temperature rising curve and the goal-selling temperature on the temperature decline curve are different, and both differences can be according to setting when the forefan strategy.Change and cause the service part temperature to rise or when descending at rotation speed of the fan like this, can be because of the subtle change of temperature frequent speed governing, increased the dirigibility that fan speed-regulating is judged.
Come such scheme is described with concrete example below, be illustrated in figure 4 as the speed governing curve synoptic diagram of the cpu fan of setting, speed governing curve among the figure has been divided into upcurve and has fallen curve after rise, and this curve is the relation of linear speed regulation, once just need to increase or reduce PWM numerical value 6% if promptly temperature rises or descends, thereby make rotating speed also increase accordingly or reduce 6%.
At first periodically obtain the temperature of service part CPU, according to the temperature variations of the CPU in former and later two accessed cycles, learn that CPU is in temperature rising curve or temperature decline curve then.If temperature rises, can judge that then CPU is in temperature rising curve; If temperature descends, can judge that then CPU is in the temperature decline curve.
When being in temperature rising curve, just preset target temperature on the Current Temperatures of comparison CPU and the temperature rising curve, is adjusted rotation speed of the fan as the temperature rising curve among Fig. 4 with regard to adopting greater than the preset temperature adjusted value as if more resulting temperature gap; Otherwise, if more resulting temperature gap within the preset temperature adjusted value, is not then adjusted the rotation speed of the fan of this CPU.
When being in the temperature decline curve, relatively preset target temperature on the Current Temperatures of CPU and the temperature decline curve, is adjusted the fan revolution as the temperature decline curve among Fig. 4 with regard to adopting greater than the preset temperature adjusted value as if more resulting temperature gap; Otherwise, if more resulting temperature gap within the preset temperature adjusted value, is not then adjusted the rotation speed of the fan of this CPU.
In addition, when the fan on the service part has many groups, can also set the fan speed-regulating strategy at special circumstances, when all fans run well, if environment temperature is greater than default environment temperature, and Current Temperatures then selects to carry out measures areput by the user greater than preset target temperature.If Baseboard Management Controller (BMC, Board Management Controller) plate is on the throne, then the BMC plate is at first sent alarm signal, and then selects measures areput by the user, for example measures such as shutdown or frequency reducing.Default environment temperature described here can be set according to the operation demand of reality.
In addition, when the fan on the service part has many groups,, then increase the rotating speed of the fan that does not have inefficacy, for example other rotation speed of the fan can be adjusted at full speed if fan fails is wherein arranged; Or having under the situation of fan fails, only the Current Temperatures by the judgment task parts just comes the start-up temperature alarm, and carries out follow-up operation, and for example shutdown waits measure; Perhaps also can when being arranged, fan fails just directly provide temperature alarm signal, to carry out follow-up operation.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, corresponding program can be stored in a kind of computer-readable recording medium, this program comprises the steps: when carrying out
Obtain the Current Temperatures of service part;
Preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in obtains temperature gap;
If described temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part.
The above-mentioned storage medium of mentioning can be a ROM (read-only memory), disk or CD etc.
Embodiment of the present invention also provides a kind of device of adjusting rotation speed of the fan, is illustrated in figure 5 as the structural representation of embodiment of the present invention institute generator, and described device comprises temperature acquiring unit and rotation speed of the fan adjustment unit.Wherein, described temperature acquiring unit is used to obtain the Current Temperatures of service part, and the mode of specifically obtaining is seen described in the above method embodiment.
Described rotation speed of the fan adjustment unit is used for preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in, and according to more resulting temperature gap the rotation speed of the fan on the described service part is adjusted.Wherein, if more resulting temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part; Otherwise, then the rotation speed of the fan on the described service part is not adjusted.
The preset temperature adjusted value here can be set according to current fan speed-regulating strategy and actual environmental demand, can the design temperature adjusted value it be 5 degrees centigrade for example, that is to say when more resulting temperature gap during, just the rotation speed of the fan on this service part is adjusted greater than 5 degrees centigrade; Otherwise, if more resulting temperature gap in 5 degrees centigrade, is adjusted the rotation speed of the fan on the service part with regard to not needing.Such decision condition can be avoided the frequent speed governing of fan, in the serviceable life of having improved fan, has improved system performance.
Can also comprise the temperature curve judging unit in the above device, described temperature curve judging unit is used for the Current Temperatures situation of change according to the accessed service part of described temperature acquiring unit, judges the residing temperature curve of described service part; Wherein, if the temperature of described service part raises, judge that then described service part is in temperature rising curve, and rotation speed of the fan is adjusted by described rotation speed of the fan adjustment unit; If the temperature of described service part descends, judge that then described service part is in the temperature decline curve, and rotation speed of the fan is adjusted by described rotation speed of the fan adjustment unit.
In addition, can also comprise the rotating speed adjusting module in the above rotation speed of the fan adjustment unit, described rotating speed adjusting module is used for adjusting the pulse-length modulation value according to the degree that described service part temperature rises or descends, and makes the rotation speed of the fan of described service part increase accordingly or reduces.
In addition, can also comprise that target temperature is provided with the unit in the above device, described target temperature is provided with the unit and is used for according to preset target temperature on the current fan strategy design temperature curve; Wherein, have difference between the preset target temperature on preset target temperature and the temperature decline curve on the described temperature rising curve, both differences can be according to setting when the forefan strategy.Change and cause the service part temperature to rise or when descending at rotation speed of the fan like this, can be because of the subtle change of temperature frequent speed governing, increased the dirigibility of fan speed-regulating.
Above-described device can integratedly be arranged on the service part; Also can be arranged to independent functional entity, maintain the connection with service part.
In sum, it is more reasonable that embodiment of the present invention can make the speed governing of fan judge, and guarantee the speed governing that fan can be not frequent, in the serviceable life of having improved fan simultaneously, improved system performance.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (13)
1, a kind of method of adjusting rotation speed of the fan is characterized in that,
Obtain the Current Temperatures of service part;
Preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in obtains temperature gap;
If described temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part.
2, the method for claim 1 is characterized in that, described temperature curve comprises temperature rising curve and temperature decline curve;
Wherein, preset target temperature on the Current Temperatures of described service part and the described service part temperature curve of living in obtains temperature gap, specifically comprises:
Obtain the temperature variations and the current rotation speed of the fan of described service part;
Raise if described temperature variations is a temperature, then obtain the described target temperature corresponding with current rotation speed of the fan from described temperature rising curve;
Descend if described temperature variations is a temperature, then obtain the described target temperature corresponding with current rotation speed of the fan from described temperature decline curve;
According to the difference of described Current Temperatures and described target temperature, obtain temperature gap.
3, method as claimed in claim 2 is characterized in that, described rotation speed of the fan on the described service part is adjusted, and specifically comprises:
Raise if described temperature variations is a temperature, then the degree that rises according to temperature in the described temperature rising curve increases the pulse-length modulation value, makes the rotation speed of the fan of described service part increase;
Descend if described temperature variations is a temperature, then the degree that descends according to temperature in the described temperature decline curve reduces the pulse-length modulation value, makes the rotation speed of the fan of described service part reduce.
4, method as claimed in claim 2 is characterized in that, on the described temperature rising curve on preset target temperature and the temperature decline curve preset target temperature have difference, both are according to setting when the forefan strategy.
5, the method for claim 1 is characterized in that, preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in obtains temperature gap and comprises:
Obtain current rotation speed of the fan;
Obtain the described target temperature corresponding from described temperature curve with current rotation speed of the fan;
According to the difference of described Current Temperatures and described target temperature, obtain temperature gap.
6, the method for claim 1 is characterized in that, described rotation speed of the fan adjustment on the described service part is comprised:
Obtain the temperature variations of described service part;
Raise if described temperature variations is a temperature, then the degree that rises according to temperature in the described temperature line increases the pulse-length modulation value, makes the rotation speed of the fan of described service part increase;
Descend if described temperature variations is a temperature, then the degree that descends according to temperature in the described temperature curve reduces the pulse-length modulation value, makes the rotation speed of the fan of described service part reduce.
7, the method for claim 1 is characterized in that, described method also comprises:
If described temperature gap less than the preset temperature adjusted value, is not then adjusted the rotation speed of the fan on the described service part.
8, the method for claim 1 is characterized in that, described method also comprises:
When the fan on the service part ran well, if environment temperature is greater than default environment temperature, and Current Temperatures was greater than preset target temperature, and then output is shut down for user's selection or the signal of down conversion process.
9, the method for claim 1 is characterized in that, when the fan on the service part has when a plurality of, described method also comprises:
If fan fails is wherein arranged, then increase the rotating speed of the fan that does not have inefficacy;
Or, come the start-up temperature alarm by the Current Temperatures of judging described service part;
Or, provide temperature alarm signal.
10, a kind of device of adjusting rotation speed of the fan is characterized in that, comprising:
The temperature acquiring unit is used to obtain the Current Temperatures of service part;
The rotation speed of the fan adjustment unit is used for preset target temperature on the Current Temperatures of more described service part and the described service part temperature curve of living in, and according to more resulting temperature gap the rotation speed of the fan on the described service part is adjusted; Wherein, if more resulting temperature gap greater than the preset temperature adjusted value, is then adjusted the rotation speed of the fan on the described service part.
11, device as claimed in claim 10 is characterized in that, described device also comprises:
The temperature curve judging unit is used for the Current Temperatures situation of change according to the accessed service part of described temperature acquiring unit, judges the residing temperature curve of described service part; Wherein, if the temperature of described service part raises, judge that then described service part is in temperature rising curve, and rotation speed of the fan is adjusted by described rotation speed of the fan adjustment unit; If the temperature of described service part descends, judge that then described service part is in the temperature decline curve, and rotation speed of the fan is adjusted by described rotation speed of the fan adjustment unit.
12, device as claimed in claim 10 is characterized in that, comprises in the described rotation speed of the fan adjustment unit:
The rotating speed adjusting module is used for adjusting the pulse-length modulation value according to the degree that described service part temperature rises or descends, and makes the rotation speed of the fan of described service part increase accordingly or reduce.
13, device as claimed in claim 10 is characterized in that, also comprises in the described device:
Target temperature is provided with the unit, is used for according to preset target temperature on the current fan strategy design temperature curve.
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