CN102734192A - Fan controlling system and method therefor - Google Patents
Fan controlling system and method therefor Download PDFInfo
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- CN102734192A CN102734192A CN2011100812087A CN201110081208A CN102734192A CN 102734192 A CN102734192 A CN 102734192A CN 2011100812087 A CN2011100812087 A CN 2011100812087A CN 201110081208 A CN201110081208 A CN 201110081208A CN 102734192 A CN102734192 A CN 102734192A
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Abstract
一种风扇控制系统，包括一基本输入输出系统(BIOS)、一基板管理控制器(BMC)、一脉冲发生器及一信号选择器，所述BIOS识别所述BMC标志位的变化并根据所述标志位的变化输出不同的信号给所述信号选择器，所述信号选择器根据所述BIOS的输出信号来选择所述BMC所输出的PWM信号或者所述脉冲发生器所输出的PWM信号传递给风扇。本发明还提供了一种风扇控制系统的方法。
A fan control system, including a basic input and output system (BIOS), a baseboard management controller (BMC), a pulse generator and a signal selector, the BIOS recognizes the change of the BMC flag bit and according to the The change of the flag bit outputs different signals to the signal selector, and the signal selector selects the PWM signal output by the BMC or the PWM signal output by the pulse generator according to the output signal of the BIOS. fan. The invention also provides a method for controlling the fan system.
Description
Technical field
The present invention relates to a kind of fan control system and method.
Background technique
In communication and computer realm, along with the development of technology, the power consumption of equipment is increasingly high, therefore, the heat dispersion and the reliability thereof of radiation system is had higher requirement.At present, the main heat dissipating method in this field mainly is to utilize radiation fan to carry out active wind-cooling heat dissipating.Wherein radiation fan all is to use baseboard management controller (Baseboard Management Control, (Pulse Width Modulation PWM) controls it pulse-modulated signal BMC).Under the situation that satisfies the system radiating requirement, use the pwm signal control radiation fan of BMC can reach the power consumption of reduction system and the purpose of noise.But, if BMC quits work suddenly during fan in control, the speed running before this moment, fan will quit work with BMC, its rotating speed will be no longer changes with the change of system temperature, so possibly reduce the heat dispersion of system.
Summary of the invention
In view of above situation, the invention provides a kind of in the following fan control system and method that can guarantee the heat dispersion of system of the out-of-work situation of BMC.
A kind of fan control system; Comprise a basic input output system (BIOS), a baseboard management controller (BMC), a pulse oscillator and a signal selector; Said BIOS discerns the variation of said BMC flag bit and gives said signal selector according to the variation of said flag bit output various signals, and the pwm signal that said signal selector selects pwm signal that said BMC exports or said pulse oscillator to export according to the output signal of said BIOS passes to fan.
A kind of method of fan control system, the method comprising the steps of:
Said pulse oscillator produces pwm signal rotates fan at full speed;
Said BMC regularly is provided with the value of its flag bit;
Said BIOS regularly reads and stores the value of said BMC inner mark position;
Whether the value in more said BIOS stored space is consistent;
If the value of said storage space is inconsistent; Said signal selector selects the pwm signal of said BMC to pass to fan; Promptly make the pwm signal of said BMC control said fan rotation, execution in step " said BIOS regularly reads and store the value of said BMC inner mark position " afterwards;
If the value of said storage space is consistent; Said signal selector selects the pwm signal of said pulse oscillator to pass to fan; Promptly make the pwm signal of said pulse oscillator control said external fan rotation, execution in step " said BIOS regularly reads and store the value of said BMC inner mark position " afterwards.
Compared to existing technology, said fan control system and method are selected different pwm signals through the variation of judging said BMC flag bit, just can after said BMC quits work, overcome the thermal diffusivity of system and the deficiency of fluctuation of service.
Description of drawings
Fig. 1 is the skeleton diagram of fan control system of the present invention and fan.
Fig. 2 is the flow chart of control method for fan preferred embodiment of the present invention.
The primary component symbol description
| Basic |
10 |
| |
12 |
| |
14 |
| |
16 |
| |
20 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
See also Fig. 1; Fan control system of the present invention is used to control a fan 20, and the preferred embodiments of said fan control system comprises a basic input output system (BIOS) 10, a baseboard management controller (BMC) 12, a pulse oscillator 14 and a signal selector 16.
Said BMC 12 is provided with a flag bit in its configuration data memory block.Said BMC12 regularly is provided with the value of its flag bit, is the value that the cycle its flag bit is set regularly with one second for example.If said BMC 12 proper functioning; Then the value of said BMC 12 its flag bits is set to " 0 " in first cycle; The value of its flag bit is set to " 1 " in second period, and the value of its flag bit is set to " 0 " in the 3rd cycle, and the value of its flag bit is set to " 1 " in the 4th cycle; So be arranged alternately, the value of its flag bit is alternately occurred for " 0 ", " 1 "; If said BMC 12 quits work, the value of its flag bit will no longer change.
The variation of said BMC 12 flag bits of said BIOS 10 identifications is also given said signal selector 16 according to the variation output various signals of said flag bit, and the pwm signal that pwm signal that said signal selector 16 is selected said BMC 12 is exported according to the output signal of said BIOS 10 or said pulse oscillator 14 are exported passes to fan 20.
Said BIOS 10 to be being provided with the value that identical cycle of said sign place value regularly read and stored flag bits in the said BMC 12 with said BMC 12, and the value of the flag bit that is read in former and later two adjacent periods is compared.If the value of two interior flag bits that read of adjacent periods is consistent, said BIOS 10 produces a high level signal; Otherwise, produce a low level signal.In this mode of execution; Said BIOS 10 only stores the value of the flag bit that is read in former and later two adjacent periods; Promptly; The value of promptly deleting the flag bit that is read in the last cycle after the value of the flag bit that in said BIOS 10 relatively accomplishes two adjacent periods, is read, the value of just storing the flag bit that is read in following one-period afterwards.
The pwm signal that said impulser 14 produces is continuous high level signal (being that said pulse oscillator 14 generation dutycycles are 1 pwm signal).
In this mode of execution, said signal selector 16 can be a multiway analog switch (MUX).Said signal selector 16 is confirmed the said BMC 12 of conducting and fan 20 or said pulse oscillator 14 and fan 20 through the level signal that reads said BIOS 10 and produce, and the pwm signal of being exported with pwm signal that said BMC 12 is exported or said pulse oscillator 14 passes to said fan 20.
If said BMC 12 is in normal working; It will be provided with the value of flag bit in the interior data memory block with certain cycle; The value that is flag bit in the BMC 12 internal data store districts that in two adjacent periods, read of said BIOS 10 will change; At this moment, 10 of said BIOS produce low level level signal, and 16 pwm signals that said BMC 10 is exported of said signal selector pass to said fan 20; If said BMC12 is in off working state, it will not change the value of inner mark position, and at this moment, said BIOS10 will produce the level signal of high level, and 16 pwm signals that said pulse oscillator 14 is exported of said signal selector pass to said fan 20.Because the pwm signal that said pulse oscillator 14 is exported is continuous high level signal, therefore, said fan 20 will be always with its maximum speed work.So can guarantee when said BMC is in off working state 20 radiating requirements that can satisfy system of said fan.
See also Fig. 2, control method for fan preferred embodiment of the present invention may further comprise the steps:
Step S1, said pulse oscillator 14 produce pwm signal rotates fan 20 at full speed.Behind the system boot, said pulse oscillator 14 produces the pwm signal of continuous high level, so makes said fan 20 with its maximum speed work.
Step S2, said BMC 12 regularly is provided with the value of its flag bit, is the value that the cycle its flag bit is set regularly with one second for example.If said BMC 12 proper functioning; Then the value of said BMC 12 its flag bits is set to " 0 " in first cycle; The value of its flag bit is set to " 1 " in second period, and the value of its flag bit is set to " 0 " in the 3rd cycle, and the value of its flag bit is set to " 1 " in the 4th cycle; So be arranged alternately, the value of its flag bit is alternately occurred for " 0 ", " 1 "; If said BMC 12 quits work, the value of its flag bit will no longer change.
Step S3, said BIOS 10 regularly reads and stores the value of said BMC 12 inner mark positions.In this mode of execution; Said BIOS 10 is to be provided with the value that flag bits in the said BMC 12 are read in its cycle that indicates place value timing with said BMC 12; And said BIOS10 only stores the value of the flag bit that is read in former and later two adjacent periods; That is, the value of promptly deleting the flag bit that is read in the last cycle after the value of the flag bit that in said BIOS 10 relatively accomplishes two adjacent periods, is read, the value of just storing the flag bit that is read in following one-period afterwards.
Step S4, whether the value in more said BIOS 10 stored spaces is consistent; Said storage space is used to store the value of flag bit in the said BMC 12 internal data store districts, and when the value of the flag bit in the said memory block was consistent, said BIOS 10 produced a high level signal and gives said signal selector 16, and gets into step S6; When the value of the flag bit in the said memory block was inconsistent, said BIOS 10 produced a low level signal and gives said signal selector 16, and gets into step S5.
Step S5, said signal selector 16 selects the pwm signal of said BMC 12 to pass to fan 20, promptly makes the pwm signal of said BMC 12 control said fan 20 rotation, execution in step S3 afterwards.
Step S6, said signal selector 16 selects the pwm signal of said pulse oscillator 14 to pass to fan 20, promptly makes the pwm signal of said pulse oscillator 14 control said external fan 20 rotation, execution in step S3 afterwards.
Above-described only is mode of execution of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (9)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100812087A CN102734192A (en) | 2011-03-31 | 2011-03-31 | Fan controlling system and method therefor |
| TW100112157A TWI426182B (en) | 2011-03-31 | 2011-04-08 | System and method for controlling fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100812087A CN102734192A (en) | 2011-03-31 | 2011-03-31 | Fan controlling system and method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102734192A true CN102734192A (en) | 2012-10-17 |
Family
ID=46990281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100812087A Pending CN102734192A (en) | 2011-03-31 | 2011-03-31 | Fan controlling system and method therefor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102734192A (en) |
| TW (1) | TWI426182B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790844A (en) * | 2012-10-30 | 2014-05-14 | 英业达科技有限公司 | Fan control system and method |
| CN103835972A (en) * | 2012-11-20 | 2014-06-04 | 英业达科技有限公司 | Fan rotating speed control system and method for control rotating speed of fan |
| CN103970632A (en) * | 2014-05-27 | 2014-08-06 | 浪潮电子信息产业股份有限公司 | Method for restoring default fan rotating speed of Smart Rack cabinet |
| CN104791278A (en) * | 2014-01-16 | 2015-07-22 | 鸿富锦精密工业（深圳）有限公司 | Fan control system and method |
| CN109185208A (en) * | 2018-08-15 | 2019-01-11 | 郑州云海信息技术有限公司 | A kind of fan speed-governing method and relevant apparatus |
| CN114718892A (en) * | 2021-01-06 | 2022-07-08 | 广州视源电子科技股份有限公司 | Control system and method for fan, and computer storage medium |
| CN118934670A (en) * | 2024-07-25 | 2024-11-12 | 河南昆仑技术有限公司 | A fan control method and server |
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| TWI288524B (en) * | 2005-12-30 | 2007-10-11 | Inventec Corp | System and method for controlling fan rotational speed |
| US7653824B2 (en) * | 2006-08-03 | 2010-01-26 | Dell Products, Lp | System and method of managing heat in multiple central processing units |
| US8280559B2 (en) * | 2008-06-11 | 2012-10-02 | Advanced Micro Devices, Inc. | Apparatus and method for providing cooling to multiple components |
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2011
- 2011-03-31 CN CN2011100812087A patent/CN102734192A/en active Pending
- 2011-04-08 TW TW100112157A patent/TWI426182B/en not_active IP Right Cessation
Patent Citations (5)
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| US7849332B1 (en) * | 2002-11-14 | 2010-12-07 | Nvidia Corporation | Processor voltage adjustment system and method |
| US20050160323A1 (en) * | 2003-12-26 | 2005-07-21 | Yi-Chang Wu | Error-examining method for monitor circuit |
| US20080281475A1 (en) * | 2007-05-09 | 2008-11-13 | Tyan Computer Corporation | Fan control scheme |
| CN101430589A (en) * | 2007-11-08 | 2009-05-13 | 英业达股份有限公司 | Fan speed control device |
| CN101876328A (en) * | 2009-10-29 | 2010-11-03 | 浪潮电子信息产业股份有限公司 | A method for reducing server system start-up noise |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790844A (en) * | 2012-10-30 | 2014-05-14 | 英业达科技有限公司 | Fan control system and method |
| CN103790844B (en) * | 2012-10-30 | 2016-09-14 | 英业达科技有限公司 | Fan control system and control method for fan |
| CN103835972A (en) * | 2012-11-20 | 2014-06-04 | 英业达科技有限公司 | Fan rotating speed control system and method for control rotating speed of fan |
| CN104791278A (en) * | 2014-01-16 | 2015-07-22 | 鸿富锦精密工业（深圳）有限公司 | Fan control system and method |
| CN103970632A (en) * | 2014-05-27 | 2014-08-06 | 浪潮电子信息产业股份有限公司 | Method for restoring default fan rotating speed of Smart Rack cabinet |
| CN109185208A (en) * | 2018-08-15 | 2019-01-11 | 郑州云海信息技术有限公司 | A kind of fan speed-governing method and relevant apparatus |
| CN114718892A (en) * | 2021-01-06 | 2022-07-08 | 广州视源电子科技股份有限公司 | Control system and method for fan, and computer storage medium |
| CN114718892B (en) * | 2021-01-06 | 2024-03-19 | 广州视源电子科技股份有限公司 | Fan control system and method and computer storage medium |
| CN118934670A (en) * | 2024-07-25 | 2024-11-12 | 河南昆仑技术有限公司 | A fan control method and server |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI426182B (en) | 2014-02-11 |
| TW201239203A (en) | 2012-10-01 |
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Application publication date: 20121017 |