CN104121213A - Method and system for fan control - Google Patents
Method and system for fan control Download PDFInfo
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- CN104121213A CN104121213A CN201310145649.8A CN201310145649A CN104121213A CN 104121213 A CN104121213 A CN 104121213A CN 201310145649 A CN201310145649 A CN 201310145649A CN 104121213 A CN104121213 A CN 104121213A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention provides a method and system for fan control. The method includes the steps that a reliable temperature of each hard disk in operation is preset; a one-to-one corresponding relation between the average temperature of the hard disks and the rotating speed of a fan is established and stored and when the temperatures of the hard disks are higher than the reliable temperatures, a corresponding relation between the temperatures and the rotating speed of the fan is established and stored; actual temperatures of the multiple hard disks are read; the read actual temperatures of the multiple hard disks are sequentially compared with the preset reliable temperatures of the hard disks in operaiton, when no temperature of the hard disks is higher than the reliable temperatures of the hard disks in operaiton, the average temperature of the hard disks is calculated, the rotating speed, corresponding to the pre-stored average temperature, of the fan is found, and a control signal is output to the fan so that the rotating speed of the fan can be adjusted; when the temperature of one hard disk is higher than the corresponding reliable temperature of the hard disk in operation, the rotating speed, corresponding to the pre-stored temperature of the hard disk, of the fan is found, and a control signal is output to the fan so that the rotating speed of the fan can be adjusted. According to the method and system for fan control, reliability of the hard disks can be well improved, power consumption of the fan is reduced, and noise of the system is lowered.
Description
Technical field
The present invention relates to a kind of bulk memory technical field that the present invention relates to, the control field of the fan of particularly storage being lowered the temperature, is specially a kind of control method for fan and system.
Background technique
Along with the development of network, as the performance of the server of the network equipment, be constantly improved, and more and more abundanter along with Internet resources, the requirement that is specifically designed to the storage of data storage also improves constantly.In these servers, storage is the equipment that is used as specially network data storage use; conventionally can be equipped on server uses together; because need to be arranged on together with server in frame; outward appearance and the server of storage are quite similar; there is cabinet; the front end of cabinet has a front panel, when certainly cabinet is arranged in frame, before be exposed to frame front end for user's operation.The most important parts of storage are exactly hard disk, the storage capacity of a storage, and how many hard disks of can planting, are the most important technical orders of storage, in general, the more storage of storage capacity can provide more powerful data access function.
Yet, when the hard disk quantity in storage is enough large, Temperature numerical for hard disk work must especially be paid attention to, this be because, each hard disk is when carrying out data access operation, its internal electronic element all can heat up, and then form temperature synergistic effect between many hard disks, this especially comprises the storage of extensive hard disk array for storage, and its heat sinking function is faced very acid test.
General mass-storage system is mainly by some storage mediums 2.5 "/3.5 " hard disk or solid state hard disc, some cooling fans, power supply and control panel form.Air based on fan is cooling is at present the method for the storage of the most frequently used next cooling extensive hard disk array, continuous expansion along with memory span, the power consumption of storage is in continuous increase, correspondingly need epistasis more can fan provide enough air quantity to guarantee that it normally works, and 3 powers of the power consumption of fan and rotation speed of the fan are directly proportional.
In order to increase the storage capacity of per unit volume, improve the competitive ability of product, need to configure hard disk quantity as much as possible, cooling fan need to provide sufficient air quantity that hard disk is operated in below reliable temperature (50C) to guarantee that hard disk is normally operated in certain environment temperature, as 0～+ 40C simultaneously.The common heat management to storage is based on ambient temperature, to adjust rotation speed of the fan to guarantee that in system, whole hard disks are operated in below temperature limiting separately, and do not consider the hard disk power consumption difference that dissimilar hard disk and hard disk bring under different operating state, so just may cause the supercooling of mass-storage system, not only waste the power consumption of fan and working life but also increased the noise of system.
Summary of the invention
The shortcoming of prior art, the object of the present invention is to provide a kind of control method for fan and system in view of the above, for solving prior art, the temperature of storage is controlled and is not only wasted the power consumption of fan and working life but also increase the problems such as storage noise.
For achieving the above object and other relevant objects, the invention provides a kind of control method for fan, be applied to have a plurality of hard disks and corresponding respectively this hard disk carries out in the electronic equipment of cooling a plurality of fans, described control method for fan comprises the following steps:
A reliable temperature of default hard disk operation;
The temperature when one-to-one relationship of foundation storage hard disk mean temperature and rotation speed of the fan and foundation storage hard disk temperature are greater than reliable temperature and the corresponding relation of rotation speed of the fan;
Read the true temperature of a plurality of hard disks;
The true temperature of a plurality of hard disks that read is compared with the default respectively reliable temperature of this hard disk operation successively, judge whether that the temperature of hard disk is greater than the reliable temperature of hard disk operation, if without exporting the first judged result, export the second judged result if having;
When receiving the first judged result, calculate the mean temperature of hard disk, search the pre-stored corresponding rotation speed of the fan of this mean temperature and to described fan output control signal, adjust the rotating speed of described fan; When receiving the second judged result, search the corresponding rotation speed of the fan of temperature of this pre-stored hard disk and to described fan output control signal, adjust the rotating speed of described fan.
Preferably, be also included as the step that described fan arranges initial speed.
Preferably, when the one-to-one relationship of foundation storage hard disk mean temperature and rotation speed of the fan, the minimum value of a default hard disk mean temperature, is 30% of fan maximum (top) speed lower than the corresponding rotation speed of the fan of hard disk temperature of the minimum value of described hard disk mean temperature.
Preferably, when temperature when foundation storage hard disk temperature are greater than reliable temperature and the corresponding relation of rotation speed of the fan, the maximum (top) speed of the corresponding fan of hard disk temperature.
Preferably, when receiving the second judged result, according to pid control algorithm, controlling rotation speed of the fan increases gradually, until reach the maximum (top) speed of fan; Described pid control algorithm is: rotation speed of the fan (k)=rotation speed of the fan (k-1)+Kp * (T (k)-T (k-1)+Ki * (T (k)-50+Kd * (T (k)-2 * T (k-1)+T (k-2)); Wherein, k is time state parameter, rotation speed of the fan (k) is k rotation speed of the fan constantly, rotation speed of the fan (k-1) is k-1 rotation speed of the fan constantly, T (k), T (k-1), T (k-2) are respectively the k moment, the k-1 moment, the k-2 mean temperature of hard disk constantly, and Kp, Ki, Kd are respectively scaling factor, integral coefficient, differential coefficient.
The present invention is also providing a kind of fan control system in addition on the one hand, be applied to have a plurality of hard disks and corresponding respectively this hard disk carries out in the electronic equipment of cooling a plurality of fans, described fan control system comprises: a plurality of temperature transducers, respectively corresponding a plurality of described hard disk settings, for detection of the correspondence true temperature of this hard disk respectively; Temperature reading unit, has a plurality of IO mouths, is connected respectively for reading the true temperature of the hard disk that described temperature transducer detects with a plurality of temperature transducers; The default unit of reliable temperature, for a reliable temperature of default hard disk operation; Storage unit, prestores for setting up and the first contingency table of the one-to-one relationship of storage hard disk mean temperature and rotation speed of the fan, and the second contingency table of setting up the corresponding relation of temperature when also storage hard disk temperature is greater than reliable temperature and rotation speed of the fan; Temperature comparison judgment unit, be connected with temperature reading unit and the default unit of reliable temperature, the true temperature of a plurality of hard disks that read is compared with the reliable temperature of respectively this hard disk of presetting successively, judge whether that the true temperature of hard disk is greater than the reliable temperature of hard disk operation, if without exporting the first judged result, export the second judged result if having; Mean temperature computing unit, when receiving the first judged result, extracts and calculates the true temperature of all hard disks and calculate mean temperature; Output control unit, when receiving the first judged result, from described mean temperature computing unit, obtain mean temperature, and in described the first contingency table, search the corresponding rotation speed of the fan of this mean temperature and to described fan output control signal, adjust the rotating speed of described fan; When receiving the second judged result, in described the second contingency table, search the corresponding rotation speed of the fan of temperature of this hard disk and to described fan output control signal, adjust the rotating speed of described fan.
Preferably, also comprise initialization unit, for described fan arranges initial speed.
Preferably, in described the first contingency table, be preset with the minimum value of a hard disk mean temperature, lower than the corresponding rotation speed of the fan of hard disk temperature of the minimum value of described hard disk mean temperature, be 30% of fan maximum (top) speed.
Preferably, the maximum (top) speed that in described the second contingency table, the corresponding rotation speed of the fan of hard disk temperature is fan.
Preferably, described output control unit is when receiving the second judged result, and according to pid control algorithm, controlling current rotation speed of the fan increases gradually, until reach the maximum (top) speed of fan; Described pid control algorithm is: rotation speed of the fan (k)=rotation speed of the fan (k-1)+Kp * (T (k)-T (k-1)+Ki * (T (k)-50+Kd * (T (k)-2 * T (k-1)+T (k-2)); Wherein, k is time state parameter, rotation speed of the fan (k) is k rotation speed of the fan constantly, rotation speed of the fan (k-1) is k-1 rotation speed of the fan constantly, T (k), T (k-1), T (k-2) are respectively the k moment, the k-1 moment, the k-2 mean temperature of hard disk constantly, and Kp, Ki, Kd are respectively scaling factor, integral coefficient, differential coefficient.
As mentioned above, control method for fan of the present invention and system, have following beneficial effect:
The present invention is by the reliable temperature of default hard disk operation, in can well balance hard disk reliability and power consumption and the storage noise of fan.In addition, can also improve the life-span of storage, but also reduce the electric power energy that storage operation consumes, improve working efficiency, also improve memory performance simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of fan control system of the present invention.
Figure 2 shows that in fan control system of the present invention, the first contingency table is set up the one-to-one relationship schematic diagram of hard disk mean temperature and rotation speed of the fan according to linear control method.
Figure 3 shows that the schematic flow sheet of fan controlling method of the present invention.
Element numbers explanation
Embodiment
Now by the detailed example illustrating in alterations with reference to the present invention.To the greatest extent its may, all graphic middle by the element numbers according to identical to represent same or similar parts.
When and while reading with each alterations, detailed description that can better understanding preferable example of the present invention.But should be appreciated that the present invention is not limited to painted accurate row and puts mode and apparatus.In addition, will recognize in order to illustrate simple and clearly, the assembly being shown in graphic might not be according to scale.For example, for details in clear demonstration figure, the size of some assembly may be amplified to some extent with respect to other assemblies.
In order to increase the storage capacity of per unit volume, improve the competitive ability of product, need to configure hard disk quantity as much as possible, cooling fan need to provide sufficient air quantity that hard disk is operated in below reliable temperature (50C) to guarantee that hard disk is normally operated in certain environment temperature, as 0～+ 40C simultaneously.The common heat management to storage is based on ambient temperature, to adjust rotation speed of the fan to guarantee that in system, whole hard disks are operated in below temperature limiting separately, and do not consider the hard disk power consumption difference that dissimilar hard disk and hard disk bring under different operating state, so just may cause the supercooling of mass-storage system, not only waste the power consumption of fan and working life but also increased the noise of system.
Given this, the object of the present invention is to provide a kind of control method for fan and system, for solving prior art, the temperature of storage is controlled and not only wasted the power consumption of fan and working life but also increase the problems such as storage noise.To elaborate principle and the mode of execution of a kind of control method for fan of the present invention and system below, make those skilled in the art not need creative work can understand a kind of control method for fan of the present invention and system.
Refer to Fig. 1, be shown as the structural representation of fan control system of the present invention.As shown in Figure 1, the invention provides a kind of fan control system, be applied to have a plurality of hard disks 2 and corresponding respectively this hard disk 2 carries out in the electronic equipment of cooling a plurality of fans 3, particularly, described fan control system 1 comprises: temperature transducer 11, temperature reading unit 12, the default unit 14 of reliable temperature, storage unit 13, temperature comparison judgment unit 15, mean temperature computing unit 16 and output control unit 17.
Below described fan control system 1 is elaborated.
Described temperature transducer 11 is for detection of the correspondence true temperature of this hard disk 2 respectively.The quantity of described temperature transducer 11 is a plurality of, and the quantity of described temperature transducer 11 equates with the quantity of described hard disk 2, a plurality of described temperature transducers 11 respectively corresponding a plurality of described hard disk 2 arrange, and are equivalent at the corresponding temperature transducer 11 of each hard disk 2.
Described temperature transducer 11 can adopt SMD temperature transducer, be attached to the surface of described hard disk 2, in addition, described temperature transducer 11 also can adopt other form to gather the temperature of described hard disk 2, for example, be arranged on the temperature that described hard disk 2 is responded on described hard disk 2 sides.All temperature transducers of realizing collection hard disk 2 temperature all can be used for the present invention.
Except described temperature transducer 11, temperature reading unit 12, the default unit 14 of reliable temperature, storage unit 13, temperature comparison judgment unit 15, mean temperature computing unit 16 and output control unit 17 can be arranged in controller.The default unit 14 of reliable temperature, storage unit 13, temperature comparison judgment unit 15, mean temperature computing unit 16 also can be realized by the software program of upper-position unit.
Described temperature reading unit 12 has a plurality of IO mouths, is connected respectively for reading the true temperature of the hard disk 2 that described temperature transducer 11 detects with a plurality of temperature transducers 11.Described temperature reading unit 12 also can read by a serial ports true temperature of the hard disk 2 that described temperature transducer 11 detects successively.
The default unit 14 of described reliable temperature is for a reliable temperature of default hard disk 2 operations.Particularly, this reliable temperature must be able to guarantee that hard disk 2 can normally be operated at certain environment temperature, and for example 0～40 degree Celsius, this reliable temperature is specifically set according to ambient temperature and with reference to the explanation of hard disk 2 shop instructions.In the present embodiment, this reliable temperature should be a concrete numerical value, rather than a scope, and for example reliable temperature is 50 ℃.
Described storage unit 13 prestores for setting up and the first contingency table of the one-to-one relationship of storage hard disk mean temperature and rotation speed of the fan, and the second contingency table of setting up the corresponding relation of temperature when also storage hard disk temperature is greater than reliable temperature and rotation speed of the fan.
Described the first contingency table and described the second contingency table can be a two-dimensional polling list.That is to say that described the first contingency table (two-dimensional polling list) can have two fields, wherein each row of the first field have been noted down hard disk mean temperature, and each row of the second field have been noted down the corresponding rotation speed of the fan of this hard disk mean temperature; Described the second contingency table (two-dimensional polling list) can have two fields, wherein each row of the first field have been noted down temperature when hard disk temperature is greater than reliable temperature, and each row of the second field have been noted down the corresponding rotation speed of the fan of temperature when this hard disk temperature is greater than reliable temperature.
Particularly, as shown in Figure 2, described in the present invention, in the first contingency table, also can set up according to linear control method the one-to-one relationship of hard disk mean temperature and rotation speed of the fan.For example adopt linear scale function y=5x-180, wherein x is hard disk mean temperature, and y is, and the rotation speed of the fan that limits y accounts for the percentage of fan maximum (top) speed.According to the maximum (top) speed of actual fan, determine the concrete rotation speed of the fan that should insert in described the first contingency table again.The concrete linear scale control function y=ax-b adopting can determine a, two coefficients of b according to actual conditions.
In the present embodiment, also it should be noted that, in described the first contingency table, be preset with the minimum value of a hard disk mean temperature, lower than the corresponding rotation speed of the fan of hard disk temperature of the minimum value of described hard disk mean temperature, be 30% of fan maximum (top) speed.By being preset with the minimum value of a hard disk mean temperature, in the situation that hard disk mean temperature is lower than the hard disk temperature of the minimum value of described hard disk mean temperature, corresponding rotation speed of the fan is 30% of fan maximum (top) speed, that is to say that corresponding rotation speed of the fan is a fixed value, rather than along with the reduction of hard disk mean temperature the corresponding rotating speed that also reduces described fan.
Meanwhile, in the present embodiment, the maximum (top) speed that in described the second contingency table, the corresponding rotation speed of the fan of hard disk temperature is fan.That is to say that in hard disk mean temperature fan all moves with maximum (top) speed higher than reliable temperature in the situation that.
Described temperature comparison judgment unit 15 is connected with temperature reading unit 12 and the default unit 14 of reliable temperature, the true temperature of a plurality of hard disks 2 that read is compared with the reliable temperature of respectively this hard disk 2 of presetting successively, judge whether that the true temperature of hard disk 2 is greater than the reliable temperature of hard disk 2 operations, if without exporting the first judged result, export the second judged result if having.For example reliable temperature is 50 ℃, and described temperature comparison judgment unit 15 judges whether that the true temperature of hard disk 2 is greater than 50 ℃ one by one, as long as there is the true temperature of a hard disk 2 to be greater than 50 ℃, exports the second judged result.Described temperature comparison judgment unit 15 is delivered to the first judged result in mean temperature computing unit 16 and output control unit 17, and the second judged result is delivered in output control unit 17.
Described mean temperature computing unit 16 is receiving the first judged result when (representing not have the true temperature of hard disk 2 to be greater than the reliable temperature that hard disk 2 moves), and the true temperature of extracting all hard disks 2 of calculating also calculates mean temperature.
If described output control unit 17 receives the first judged result when (representing not have the true temperature of hard disk 2 to be greater than the reliable temperature that hard disk 2 moves), from described mean temperature computing unit 16, obtain mean temperature, and in described the first contingency table, search the corresponding rotation speed of the fan of this mean temperature and to described fan output control signal, adjust the rotating speed of described fan.
When if described output control unit 17 receives the second judged result, in described the second contingency table, search the corresponding rotation speed of the fan of temperature of this hard disk 2 and to described fan output control signal, adjust the rotating speed of described fan.
Particularly, described output control unit is when receiving the second judged result, and according to pid control algorithm, controlling current rotation speed of the fan increases gradually, until reach the maximum (top) speed of fan.Described pid control algorithm is: rotation speed of the fan (k)=rotation speed of the fan (k-1)+Kp * (T (k)-T (k-1)+Ki * (T (k)-50+Kd * (T (k)-2 * T (k-1)+T (k-2)); Wherein, k is time state parameter, rotation speed of the fan (k) is k rotation speed of the fan constantly, rotation speed of the fan (k-1) is k-1 rotation speed of the fan constantly, T (k), T (k-1), T (k-2) are respectively the k moment, the k-1 moment, the k-2 mean temperature of hard disk constantly, and Kp, Ki, Kd are respectively scaling factor, integral coefficient, differential coefficient.Kp, Ki, these three coefficients of Kd need be optimized to arrange according to appointing system thermal property avoids rotation speed of the fan concussion and excessive.Kp, Ki, Kd are that those skilled in the art carry out the habitual technical parameter in PID regulating and controlling the inside, are not described in detail in this.
In addition, it should be noted that, if there is the temperature of a plurality of hard disks 2 to be greater than the reliable temperature of hard disk 2 operations, in described output control unit 17, by the highest corresponding temperature of hard disk 2 of temperature, search pre-stored corresponding rotation speed of the fan.
The present invention can also comprise initialization unit, for described fan arranges initial speed.Initial cell can arrange as required, can not adopt initial cell, and fan initial speed adopts the rotating speed while stopping last time.If fan is the fan of crossing from off-duty, by initialization unit, be that described fan arranges initial speed.
The invention provides the implementation procedure that a kind of control method for fan is also said fans control system 1, be applied to have a plurality of hard disks 2 and corresponding respectively this hard disk 2 carries out in the electronic equipment of cooling a plurality of fans, described control method for fan specifically comprises: a reliable temperature of default hard disk 2 operations; The temperature when one-to-one relationship of foundation storage hard disk 2 mean temperatures and rotation speed of the fan and foundation storage hard disk 2 temperature are greater than reliable temperature and the corresponding relation of rotation speed of the fan; Read the true temperature of a plurality of hard disks 2; The true temperature of a plurality of hard disks 2 that read is compared with the default respectively reliable temperature of these hard disk 2 operations successively, judge whether that the temperature of hard disk 2 is greater than the reliable temperature of hard disk 2 operations, if without exporting the first judged result, export the second judged result if having; When receiving the first judged result, calculate the mean temperature of hard disk 2, search the pre-stored corresponding rotation speed of the fan of this mean temperature and to described fan 3 output control signals, adjust the rotating speed of described fan 3; When receiving the second judged result, search the corresponding rotation speed of the fan of temperature of this pre-stored hard disk 2 and to described fan 3 output control signals, adjust the rotating speed of described fan 3.Can also be included as described fan 3 initial speed is set.
Setting up and during the one-to-one relationship of storage hard disk mean temperature and rotation speed of the fan, presetting the minimum value of a hard disk mean temperature, lower than the corresponding rotation speed of the fan of hard disk temperature of the minimum value of described hard disk mean temperature, be 30% of fan 3 maximum (top) speeds.
When temperature when foundation storage hard disk temperature are greater than reliable temperature and the corresponding relation of rotation speed of the fan, the corresponding rotation speed of the fan of hard disk temperature is the maximum (top) speed of fan 3.Particularly, when receiving the second judged result, according to pid control algorithm, controlling rotation speed of the fan increases gradually, until reach the maximum (top) speed of fan; Described pid control algorithm is: rotation speed of the fan (k)=rotation speed of the fan (k-1)+Kp * (T (k)-T (k-1)+Ki * (T (k)-50+Kd * (T (k)-2 * T (k-1)+T (k-2)); Wherein, k is time state parameter, rotation speed of the fan (k) is k rotation speed of the fan constantly, rotation speed of the fan (k-1) is k-1 rotation speed of the fan constantly, T (k), T (k-1), T (k-2) are respectively the k moment, the k-1 moment, the k-2 mean temperature of hard disk constantly, and Kp, Ki, Kd are respectively scaling factor, integral coefficient, differential coefficient.
If have the temperature of a plurality of hard disks 2 to be greater than the reliable temperature of hard disk 2 operations, search pre-stored corresponding rotation speed of the fan by the corresponding temperature of hard disk 2 that temperature is the highest.
As shown in Figure 3, being shown as the schematic flow sheet of a kind of control method for fan of the present invention, is also the implementation procedure of said fans control system 1.
S1, a reliable temperature of default hard disk 2 operations, for example 50 ℃; Then perform step S2.
In step S2, the temperature when one-to-one relationship of foundation storage hard disk mean temperature and rotation speed of the fan and foundation storage hard disk temperature are greater than reliable temperature and the corresponding relation of rotation speed of the fan; Then perform step S3.
In step S3, read the true temperature of a plurality of hard disks 2; Then perform step S4.
In step S4, judge whether that the temperature of hard disk 2 is greater than the reliable temperature of hard disk 2 operations, if not, then perform step S5, if so, then perform step S7.
In step S5, calculate the mean temperature of hard disk 2; Then perform step S6.
In step S6, search the pre-stored corresponding rotation speed of the fan of this mean temperature and to described fan 3 output control signals, adjust the rotating speed of described fan 3, finish.
In step S7, search the corresponding rotation speed of the fan of temperature of this pre-stored hard disk 2 and to described fan 3 output control signals, adjust the rotating speed of described fan 3, finish.
In sum, control method for fan of the present invention and system, can address the above problem by the fan control strategy of mentioning in the present invention, well power consumption and the storage noise of balance hard disk reliability and fan.In addition, can also improve the life-span of storage, but also reduce the electric power energy that storage operation consumes, improve working efficiency, also improve memory performance simultaneously.
When setting forth representative example of the present invention, this specification may be rendered as the step of a concrete sequence by operating method of the present invention and/or process.Yet because the method or process not depend on the concrete order of this step herein, thereby the method or process should not be restricted to the concrete sequence of this step.The knowledgeable that conventionally knows in technique should be understood that the step that also can adopt other sequences.Therefore, should not to be regarded as be the restriction to claim to the concrete order of this step of this specification.In addition, should not be restricted to this and sequentially carry out its each step, and person can understand to be easily familiar with technique about the claim of method of the present invention and/or process, these sequences can change and still belong in spirit of the present invention and scope to some extent.
Person should be understood that under the condition of extensive inventive concept that does not deviate from above-mentioned example to be familiar with technique, can make change to these examples.Therefore, should be understood that the present invention is not limited only to disclosed instantiation, and be intended to contain, belong to the spirit of the present invention that defines in the claims in the present invention book and all modifications in scope.
Claims (10)
1. a control method for fan, is applied to have a plurality of hard disks and corresponding respectively this hard disk carries out, in the electronic equipment of cooling a plurality of fans, it is characterized in that, described control method for fan comprises the following steps:
A reliable temperature of default hard disk operation;
The temperature when one-to-one relationship of foundation storage hard disk mean temperature and rotation speed of the fan and foundation storage hard disk temperature are greater than reliable temperature and the corresponding relation of rotation speed of the fan;
Read the true temperature of a plurality of hard disks;
The true temperature of a plurality of hard disks that read is compared with the default respectively reliable temperature of this hard disk operation successively, judge whether that the temperature of hard disk is greater than the reliable temperature of hard disk operation, if without exporting the first judged result, export the second judged result if having;
When receiving the first judged result, calculate the mean temperature of hard disk, search the pre-stored corresponding rotation speed of the fan of this mean temperature and to described fan output control signal, adjust the rotating speed of described fan; When receiving the second judged result, search the pre-stored corresponding rotation speed of the fan of this hard disk temperature and to described fan output control signal, adjust the rotating speed of described fan.
2. control method for fan according to claim 1, is characterized in that: be also included as the step that described fan arranges initial speed.
3. control method for fan according to claim 1, it is characterized in that: when the one-to-one relationship of foundation storage hard disk mean temperature and rotation speed of the fan, the minimum value of a default hard disk mean temperature, is 30% of fan maximum (top) speed lower than the corresponding rotation speed of the fan of hard disk temperature of the minimum value of described hard disk mean temperature.
4. control method for fan according to claim 1, is characterized in that: set up and during the corresponding relation of temperature when storage hard disk temperature is greater than reliable temperature and rotation speed of the fan the maximum (top) speed of hard disk temperature correspondence fan.
5. control method for fan according to claim 4, is characterized in that: when receiving the second judged result, according to pid control algorithm, controlling rotation speed of the fan increases gradually, until reach the maximum (top) speed of fan; Described pid control algorithm is: rotation speed of the fan (k)=rotation speed of the fan (k-1)+Kp * (T (k)-T (k-1)+Ki * (T (k)-50+Kd * (T (k)-2 * T (k-1)+T (k-2)); Wherein, k is time state parameter, rotation speed of the fan (k) is k rotation speed of the fan constantly, rotation speed of the fan (k-1) is k-1 rotation speed of the fan constantly, T (k), T (k-1), T (k-2) are respectively the k moment, the k-1 moment, the k-2 mean temperature of hard disk constantly, and Kp, Ki, Kd are respectively scaling factor, integral coefficient, differential coefficient.
6. a fan control system, is applied to have a plurality of hard disks and corresponding respectively this hard disk carries out, in the electronic equipment of cooling a plurality of fans, it is characterized in that, described fan control system comprises:
A plurality of temperature transducers, respectively corresponding a plurality of described hard disk settings, for detection of the correspondence true temperature of this hard disk respectively;
Temperature reading unit, has a plurality of IO mouths, is connected respectively for reading the true temperature of the hard disk that described temperature transducer detects with a plurality of temperature transducers;
The default unit of reliable temperature, for a reliable temperature of default hard disk operation;
Storage unit, prestores for setting up and the first contingency table of the one-to-one relationship of storage hard disk mean temperature and rotation speed of the fan, and the second contingency table of setting up the corresponding relation of temperature when also storage hard disk temperature is greater than reliable temperature and rotation speed of the fan;
Temperature comparison judgment unit, be connected with temperature reading unit and the default unit of reliable temperature, the true temperature of a plurality of hard disks that read is compared with the reliable temperature of respectively this hard disk of presetting successively, judge whether that the true temperature of hard disk is greater than the reliable temperature of hard disk operation, if without exporting the first judged result, export the second judged result if having;
Mean temperature computing unit, when receiving the first judged result, extracts and calculates the true temperature of all hard disks and calculate mean temperature;
Output control unit, when receiving the first judged result, from described mean temperature computing unit, obtain mean temperature, and in described the first contingency table, search the corresponding rotation speed of the fan of this mean temperature and to described fan output control signal, adjust the rotating speed of described fan; When receiving the second judged result, in described the second contingency table, search the corresponding rotation speed of the fan of temperature of this hard disk and to described fan output control signal, adjust the rotating speed of described fan.
7. fan control system according to claim 6, is characterized in that: also comprise initialization unit, for described fan arranges initial speed.
8. fan control system according to claim 6, it is characterized in that: in described the first contingency table, be preset with the minimum value of a hard disk mean temperature, lower than the corresponding rotation speed of the fan of hard disk temperature of the minimum value of described hard disk mean temperature, be 30% of fan maximum (top) speed.
9. fan control system according to claim 7, is characterized in that: the maximum (top) speed that in described the second contingency table, the corresponding rotation speed of the fan of hard disk temperature is fan.
10. fan control system according to claim 9, is characterized in that: described output control unit is when receiving the second judged result, and according to pid control algorithm, controlling current rotation speed of the fan increases gradually, until reach the maximum (top) speed of fan; Described pid control algorithm is: rotation speed of the fan (k)=rotation speed of the fan (k-1)+Kp * (T (k)-T (k-1)+Ki * (T (k)-50+Kd * (T (k)-2 * T (k-1)+T (k-2)); Wherein, k is time state parameter, rotation speed of the fan (k) is k rotation speed of the fan constantly, rotation speed of the fan (k-1) is k-1 rotation speed of the fan constantly, T (k), T (k-1), T (k-2) are respectively the k moment, the k-1 moment, the k-2 mean temperature of hard disk constantly, and Kp, Ki, Kd are respectively scaling factor, integral coefficient, differential coefficient.
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