CN111734667A - A kind of server fan speed control method and device - Google Patents

Abstract

The present invention provides a method for controlling the rotational speed of a server fan. The method includes the following steps: BMC obtains m temperature values detected by m temperature sensors in the server; Among the temperature values detected by several temperature sensors in the area, the maximum value is selected as the temperature value of the fan action area; the BMC determines the PWM signal corresponding to the temperature value of each fan action area, and the n groups corresponding to the n fan action areas are selected. The PWM signal is output to the corresponding n fans; the fan is controlled to generate a corresponding rotational speed according to the received corresponding PWM signal. The present invention also provides a server fan rotational speed control device, which effectively solves the problem that the fan control is not flexible enough due to the uniform setting of the server fan rotational speed. The problem of high energy consumption effectively improves the efficiency and flexibility of server fan control and reduces energy consumption costs.

Description

A kind of server fan speed control method and device

technical field

The present invention relates to the field of fan speed control, in particular to a method and device for regulating and controlling the fan speed of a server.

Background technique

As the performance of the server is getting higher and higher, its power consumption is also increasing, and more and more heat is generated per unit time, which puts forward higher requirements for the cooling capacity of the server. Air-cooled heat dissipation is the current mainstream server cooling method, and the fan is the core component of air-cooled heat dissipation. Since most servers need to run 24 hours a day, the fans are required to work continuously.

The maximum power of a single set of server fans usually exceeds 50W, and multiple sets of fans are deployed in each server. 6 sets of fans are deployed in each server, and the maximum power of each fan is 50W. When all fans work at full speed, the fans of each server consume 7.2 kWh of power per day. In a data center, there are hundreds or thousands of servers. In this way, the power consumption of the server fans alone will bring a high cost.

The current server fan speed control method is shown in Figure 1. The temperature sensors (Sensor1-SensorM) distributed in various positions inside the server feed back the temperature values T1-TM monitored by them to the BMC (Baseboard Management Controller, baseboard management controller). , BMC controls the fan speed through PWM (pulse width modulation) signal. After the BMC receives the temperature value fed back by each temperature sensor, according to the corresponding relationship between the preset temperature value and the fan speed, the highest temperature value in T1-TM shall prevail, and the speed of all fans is set uniformly through the PWM signal. value, that is, the fan speed of all groups in the server is the same. Due to the different areas of action of each group of fans, the temperatures in different areas are also different. If the speed of all fans is set according to the temperature in the low temperature area, the system failure will be caused by insufficient heat dissipation in the high temperature area; if the speed of all fans is set according to the temperature in the high temperature area, the speed of the fan corresponding to the low temperature area will be higher than the actual speed. The required rotational speed is high, causing energy waste and increasing the user's cost of use. At the same time, the long-term operation of some fans at a speed higher than their own required speed will also increase the risk of fan aging and failure, which is not conducive to the efficient and low-consumption operation of server fans.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present invention innovatively proposes a server fan speed control method and device, which effectively solves the problems of inflexible fan control and high energy consumption caused by the uniform setting of the server fan speed, and effectively improves the The efficiency and flexibility of server fan control reduces energy costs.

A first aspect of the present invention provides a server fan speed control method, including:

The BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

Divide m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes several temperature sensors, and select the temperature values detected by several temperature sensors in each fan action area. The maximum value is used as the temperature value of the fan's action area;

According to the relationship between the temperature value and the PWM signal, the BMC determines the PWM signal corresponding to the temperature value of each fan's action area, and outputs n groups of PWM signals corresponding to the n fan's action area to the corresponding n fans;

The fan is controlled to generate a corresponding rotational speed according to the received corresponding PWM signal.

Optionally, the relationship between the number, position, temperature value and PWM signal of the temperature sensors in the active area of each fan is preset in the BMC.

Optionally, it also includes the CPLD monitoring the working state of the BMC in real time. When the BMC is working normally, the CPLD receives n groups of PWM signals sent by the BMC and outputs them to the corresponding n fans to control the speed of the corresponding fans; when the BMC works abnormally, the CPLD Directly output the PWM signal corresponding to the maximum speed of the fan to the corresponding n fans, and control the corresponding fan to rotate at full speed.

Further, the CPLD monitors the working state of the BMC in real time by monitoring the WD signal sent by the BMC.

Optionally, the method further includes: when the CPLD monitors that the BMC works abnormally, the CPLD controls the change of the working status indicator of the BMC to give an alarm.

A second aspect of the present invention provides a server fan speed control device, comprising:

an acquisition module, where the BMC acquires m temperature values detected by m temperature sensors in the server, where m is a positive integer;

Divide the module, divide m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes several temperature sensors, and the temperature detected by several temperature sensors in each fan action area is separately detected The maximum value is selected as the temperature value of the fan's action area;

PWM signal determination module, BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM signal, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

The fan control module controls the fan to generate the corresponding rotational speed according to the corresponding PWM signal received.

Optionally, the relationship between the number, position, temperature value and PWM signal of the temperature sensors in the active area of each fan is preset in the BMC.

Optionally, it also includes a monitoring module, the CPLD monitors the working state of the BMC in real time, and when the BMC works normally, the CPLD receives n groups of PWM signals sent by the BMC and outputs them to the corresponding n fans to control the speed of the corresponding fans; when the BMC works abnormally When , the CPLD directly outputs the PWM signal corresponding to the maximum speed of the fan to the corresponding n fans, and controls the corresponding fan to rotate at full speed.

Further, the CPLD in the monitoring module monitors the working state of the BMC in real time by monitoring the WD signal sent by the BMC.

Optionally, it also includes: an alarm module, when the CPLD monitors that the BMC is abnormal, the CPLD controls the change of the working status indicator of the BMC to give an alarm.

The technical scheme adopted in the present invention includes the following technical effects:

1. The present invention effectively solves the problem of inflexible fan control and high energy consumption due to the uniform setting of server fan speeds, effectively improves the efficiency and flexibility of server fan control, and reduces energy consumption costs.

2. The technical solution of the present invention realizes the difference of the fan speed of each group by grouping the temperature values fed back by all the temperature sensors according to the fan action area, and setting the corresponding fan speed according to the highest value in each group of temperature value groups. The speed of the fan with high temperature in the active area is high, and the speed of the fan with low temperature in the active area is low, which reduces the risk of fan failure caused by long-term high-speed operation of the fan, and improves the stability of the server cooling system.

3. The present invention introduces CPLD as the fan controller to realize real-time monitoring of the working state of the BMC. When the BMC fails, the CPLD is used to control the fan, so as to prevent the fan from being out of control once the BMC fails, causing the server to overheat due to the system. Serious failures such as downtime improve the reliability of the server cooling system.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, On the premise of no creative work, other drawings can also be obtained from these drawings.

1 is a schematic structural diagram of a BMC control fan in the prior art;

Fig. 2 is the schematic flow chart of the method of Example 1 in the scheme of the present invention;

3 is a schematic structural diagram of a BMC-controlled fan in Embodiment 1 of the solution of the present invention;

4 is a schematic diagram of the relationship between the fan, the fan action area, and the temperature sensor in Example 1 of the solution of the present invention;

Fig. 5 is the schematic flow chart of the method of embodiment 2 in the scheme of the present invention;

6 is a schematic structural diagram of a CPLD monitoring auxiliary BMC control fan in Embodiment 2 in the solution of the present invention;

Fig. 7 is the schematic flow chart of the method of embodiment 3 in the scheme of the present invention;

FIG. 8 is a schematic structural diagram of the device of Example 4 in the solution of the present invention;

FIG. 9 is a schematic structural diagram of the device of Example 5 in the solution of the present invention;

FIG. 10 is a schematic structural diagram of the apparatus of Example 6 in the solution of the present invention.

Detailed ways

In order to clearly illustrate the technical features of the solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted from the present invention to avoid unnecessarily limiting the present invention.

Example 1

As shown in FIG. 2-FIG. 3, the present invention provides a method for controlling the rotational speed of a server fan, including:

S1, the BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

S2: Divide the m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes a number of temperature sensors, and separate the temperature values detected by several temperature sensors in each fan action area Select the maximum value as the temperature value of the fan's action area;

S3, BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM signal, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

S4, the fan is controlled to generate a corresponding rotational speed according to the received corresponding PWM signal.

Wherein, in step S1, the detected temperature values T1, T2...Tm of m temperature sensors are acquired. The BMC obtains the temperature values T1, T2...Tm detected by the temperature sensors distributed throughout the server through the management bus; the temperature values T1, T2...Tm are the instantaneous values monitored in real time by the corresponding temperature sensors.

In step S2, the relationship between the number, location, temperature value and PWM of the temperature sensors in each fan action area is preset in the BMC. Each fan action area includes a plurality of temperature sensors, and the maximum value is selected from the temperature values detected by the several temperature sensors in each fan action area as the temperature value of the fan action area. For example, as shown in FIG. 4 , three temperature sensors in the action area of the first fan correspond to the first fan, two temperature sensors in the action area of the second fan correspond to the second fan, and one temperature sensor in the action area of the third fan Corresponds to the third fan. Generally, in a server case, the working area of each fan is the same, but the number of temperature sensors in the working area of each fan is different, which can be determined according to the number of devices in the working area of the fan. The number of temperature sensors is relatively large; if the number of devices in the action area of the fan is small, the number of temperature sensors is relatively small, and can be adjusted flexibly, which is not limited in the present invention. It should be noted that the fan action area is the area that the fan can cover, which is generally the area directly in front of the fan in the server case.

In step S3, the BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM signal, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans; Server cooling requirements, establish the relationship between the temperature value and the required fan speed, the higher the temperature value, the higher the required fan speed. The fan speed is determined by the duty cycle of the PWM signal. The larger the duty cycle, the higher the fan speed. The corresponding relationship between the temperature value and the duty cycle of the PWM signal is preset in the BMC. The BMC outputs n groups of PWM signals corresponding to the n fan action regions to the corresponding n fans according to the temperature values of the n fan action regions.

In step S4, the n fans control the corresponding fans to rotate and dissipate heat at corresponding rotational speeds according to the received corresponding PWM signals, so as to realize independent control of rotational speeds of different fans of the server.

The invention effectively solves the problems of inflexible fan control and high energy consumption caused by the uniform setting of server fan speeds, effectively improves the efficiency and flexibility of server fan control, and reduces energy consumption costs.

The technical scheme of the present invention realizes the difference of the fan speed of each group by grouping the temperature values fed back by all the temperature sensors according to the fan action area, and setting the corresponding fan speed according to the highest value in each group of temperature value groups. The fan with high temperature in the area has a high speed, and the fan with low temperature in the corresponding operating area has a low speed, which reduces the risk of fan failure caused by long-term high-speed operation of the fan, and improves the stability of the server cooling system.

Embodiment 2

As shown in FIGS. 5-6 , the technical solution of the present invention also provides a method for controlling the rotational speed of a server fan, including:

S1, the BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

S2: Divide the m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes a number of temperature sensors, and separate the temperature values detected by several temperature sensors in each fan action area Select the maximum value as the temperature value of the fan's action area;

S3, BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM signal, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

S4, the fan is controlled to generate a corresponding rotational speed according to the received corresponding PWM signal.

S5, the CPLD monitors the working status of the BMC in real time. When the BMC is working normally, the CPLD receives n groups of PWM signals sent by the BMC and outputs it to the corresponding n fans to control the speed of the corresponding fans; when the BMC works abnormally, the CPLD directly outputs the maximum fan value. The PWM signal corresponding to the rotational speed is sent to the corresponding n fans, and the corresponding fans are controlled to rotate at full speed.

Further, the CPLD monitors the working state of the BMC in real time by monitoring the WD (watchdog, watchdog) signal sent by the BMC.

The invention introduces CPLD as the fan controller to realize real-time monitoring of the working state of the BMC. When the BMC fails, the CPLD is used to control the fan, so as to avoid the failure of the BMC and the uncontrolled fan speed, which will cause the server to be down due to overheating of the system. This improves the reliability of the server cooling system.

Embodiment 3

As shown in FIG. 7 , the technical solution of the present invention also provides a method for controlling the rotational speed of a server fan, including:

S1, the BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

S2: Divide the m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes a number of temperature sensors, and separate the temperature values detected by several temperature sensors in each fan action area Select the maximum value as the temperature value of the fan's action area;

S3, BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM signal, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

S4, the fan is controlled to generate a corresponding rotational speed according to the received corresponding PWM signal.

S5, the CPLD monitors the working status of the BMC in real time. When the BMC is working normally, the CPLD receives n groups of PWM signals sent by the BMC and outputs it to the corresponding n fans to control the speed of the corresponding fans; when the BMC works abnormally, the CPLD directly outputs the maximum fan value. The PWM signal corresponding to the rotation speed is sent to the corresponding n fans, and the corresponding fans are controlled to rotate at full speed;

S6, when the CPLD monitors that the BMC works abnormally, the CPLD controls the change of the working status indicator of the BMC to give an alarm.

In step S6, when the CPLD monitors that the BMC works abnormally, the CPLD controls the working status indicator of the BMC to change. Specifically, the working status indicator of the BMC can be controlled from bright to dark, or from dark to bright, which can be flexibly selected. , the present invention is not limited here.

In the present invention, when the CPLD monitors the abnormal operation of the BMC, the CPLD controls the change of the indicator light of the working state of the BMC to give an alarm, so as to facilitate maintenance personnel to discover the fault of the BMC in time so as to perform corresponding processing.

Embodiment 4

As shown in FIG. 8 , the present invention provides a server fan speed control device, including:

Obtaining module 101, the BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

The dividing module 102 divides the m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes a number of temperature sensors, and the temperature sensors in each fan action area are respectively detected. Select the maximum value from the temperature value as the temperature value of the fan's action area;

The PWM signal determination module 103, the BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

The fan control module 104 controls the fan to generate a corresponding rotational speed according to the received corresponding PWM signal.

The relationship between the number, location, temperature value, and PWM signal of temperature sensors in the active area of each fan is preset in the BMC.

The invention effectively solves the problems of inflexible fan control and high energy consumption caused by the uniform setting of server fan speeds, effectively improves the efficiency and flexibility of server fan control, and reduces energy consumption costs.

The technical scheme of the present invention realizes the difference of the fan speed of each group by grouping the temperature values fed back by all the temperature sensors according to the fan action area, and setting the corresponding fan speed according to the highest value in each group of temperature value groups. The fan with high temperature in the area has a high speed, and the fan with low temperature in the corresponding operating area has a low speed, which reduces the risk of fan failure caused by long-term high-speed operation of the fan, and improves the stability of the server cooling system.

Embodiment 5

As shown in FIG. 9, the present invention provides a server fan speed control device, including:

Obtaining module 101, the BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

The division module 102 divides the m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes a number of temperature sensors, and the temperature sensors in each fan action area are respectively detected. Select the maximum value from the temperature value as the temperature value of the fan's action area;

The PWM signal determination module 103, the BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

The fan control module 104 controls the fan to generate a corresponding rotational speed according to the received corresponding PWM signal;

In the monitoring module 105, the CPLD monitors the working status of the BMC in real time. When the BMC is working normally, the CPLD receives n groups of PWM signals sent by the BMC and outputs them to the corresponding n fans to control the speed of the corresponding fans; when the BMC works abnormally, the CPLD directly outputs The PWM signal corresponding to the maximum fan speed is sent to the corresponding n fans to control the corresponding fans to rotate at full speed.

The CPLD in the monitoring module 105 monitors the working state of the BMC in real time by monitoring the WD signal sent by the BMC.

The invention introduces CPLD as the fan controller to realize real-time monitoring of the working state of the BMC. When the BMC fails, the CPLD is used to control the fan, so as to avoid the failure of the BMC and the uncontrolled fan speed, which will cause the server to be down due to overheating of the system. Serious faults such as the computer, improve the reliability of the server cooling system.

Embodiment 6

As shown in FIG. 10, the present invention provides a server fan speed control device, including:

Obtaining module 101, the BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer;

The division module 102 divides the m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes a number of temperature sensors, and the temperature sensors in each fan action area are respectively detected. Select the maximum value from the temperature value as the temperature value of the fan's action area;

The PWM signal determination module 103, the BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans;

The fan control module 104 controls the fan to generate a corresponding rotational speed according to the received corresponding PWM signal;

In the monitoring module 105, the CPLD monitors the working status of the BMC in real time. When the BMC is working normally, the CPLD receives n groups of PWM signals sent by the BMC and outputs them to the corresponding n fans to control the speed of the corresponding fans; when the BMC works abnormally, the CPLD directly outputs The PWM signal corresponding to the maximum speed of the fan is sent to the corresponding n fans, and the corresponding fans are controlled to rotate at full speed;

The alarm module 106 , when the CPLD monitors that the BMC works abnormally, the CPLD controls the change of the working status indicator of the BMC to give an alarm.

In the present invention, when the CPLD monitors the abnormal operation of the BMC, the CPLD controls the change of the indicator light of the working state of the BMC to give an alarm, so as to facilitate maintenance personnel to discover the fault of the BMC in time so as to perform corresponding processing.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the scope of protection of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, those skilled in the art do not need to pay creative work. Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (10)

1. A method for controlling the rotational speed of a server fan, comprising: The BMC obtains m temperature values detected by m temperature sensors in the server, where m is a positive integer; Divide m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes several temperature sensors, and select the temperature values detected by several temperature sensors in each fan action area. The maximum value is used as the temperature value of the fan's action area; According to the relationship between the temperature value and the PWM signal, the BMC determines the PWM signal corresponding to the temperature value of each fan's action area, and outputs n groups of PWM signals corresponding to the n fan's action area to the corresponding n fans; The fan is controlled to generate a corresponding rotational speed according to the received corresponding PWM signal. 2 . The method for controlling the rotational speed of a server fan according to claim 1 , wherein the relationship between the number, position, temperature value and PWM signal of the temperature sensors in the working area of each fan is preset in the BMC. 3 . 3. server fan speed control method according to claim 1, is characterized in that, also comprises the working state of CPLD monitoring BMC in real time, when BMC works normally, CPLD receives the n group PWM signal that BMC sends and outputs to corresponding n Fan, control the speed of the corresponding fan; when the BMC is abnormal, the CPLD directly outputs the PWM signal corresponding to the maximum speed of the fan to the corresponding n fans, and controls the corresponding fan to rotate at full speed. 4. The method for controlling the rotational speed of a server fan according to claim 3, wherein the CPLD monitors the working state of the BMC in real time by monitoring the WD signal sent by the BMC. 5 . The method for controlling the rotational speed of a server fan according to claim 3 , further comprising: when the CPLD monitors that the BMC works abnormally, the CPLD controls the change of the working status indicator of the BMC to give an alarm. 6 . 6. A server fan speed control device, characterized in that, comprising: an acquisition module, where the BMC acquires m temperature values detected by m temperature sensors in the server, where m is a positive integer; Divide the module, divide m temperature values into n groups according to n of the number of fans, where n is a positive integer, each fan action area includes several temperature sensors, and the temperature detected by several temperature sensors in each fan action area is separately detected The maximum value is selected as the temperature value of the fan's action area; PWM signal determination module, BMC determines the PWM signal corresponding to the temperature value of each fan action area according to the relationship between the temperature value and the PWM signal, and outputs n groups of PWM signals corresponding to the n fan action areas to the corresponding n fans; The fan control module controls the fan to generate the corresponding rotational speed according to the corresponding PWM signal received. 7 . The device for controlling the rotational speed of a server fan according to claim 6 , wherein the relationship between the number, location, temperature value and PWM signal of the temperature sensors in the working area of each fan is preset in the BMC. 8 . 8. server fan speed control device according to claim 6, is characterized in that, also comprises monitoring module, CPLD monitors the working state of BMC in real time, when BMC works normally, CPLD receives the n group PWM signal that BMC sends and outputs to corresponding When the BMC works abnormally, the CPLD directly outputs the PWM signal corresponding to the maximum speed of the fan to the corresponding n fans, and controls the corresponding fan to rotate at full speed. 9 . The device for controlling the rotational speed of a server fan according to claim 8 , wherein the CPLD in the monitoring module monitors the working state of the BMC in real time by monitoring the WD signal sent by the BMC. 10 . 10 . The device for controlling the rotational speed of a server fan according to claim 8 , further comprising: an alarm module, when the CPLD monitors that the BMC is abnormal, the CPLD controls the change of the working status indicator of the BMC to give an alarm. 11 .

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