WO2016184231A1

WO2016184231A1 - Method of controlling fan rotation speed via fan board and device utilizing same

Info

Publication number: WO2016184231A1
Application number: PCT/CN2016/076068
Authority: WO
Inventors: 赵军强
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-05-18
Filing date: 2016-03-10
Publication date: 2016-11-24
Also published as: CN106286357A

Abstract

A method of controlling a fan rotation speed via a fan board, and a device utilizing the same. The method comprises: when a fan operates normally, transmitting, by a fan administrating single board, a heartbeat signal to a control module on the fan board; and when detecting an abnormality in the heartbeat signal, controlling, by the control module, a fan to rotate according to a preconfigured rotation speed. The solution in the invention addresses a technical problem of a fan operating at a full speed owing to a fan board of a standalone CPU system being unable to automatically controlling a fan rotation speed during power-up initialization.

Description

Fan board fan speed control method and device

Technical field

This document relates to, but is not limited to, the speed control technology of a fan board without an independent CPU system, and relates to a fan board fan speed control method and device.

Background technique

As the cooling and cooling component of the system, the fan unit is mainly composed of a fan board, a fan board, a fan, a fan box box and a link cable. As the core control component of the fan unit, the fan board currently has the following three control management methods:

The first common control management method is controlled and managed by the fan board itself. The principle is shown in Figure 1(a). This fan board has its own minimum control system (CPU). In the automatic mode, the speed can be automatically adjusted according to the ambient temperature of the subrack. In the manual mode, the fan speed can be set by the network management system and sent directly to the fan board. The fan board directly adjusts the speed.

The second type of fan control management method is relatively rare and special. The fan board of this control management mode does not have a minimum control system (CPU). Its control and management are mainly handled by another board (here represented by a fan-hosted board). The principle is shown in Figure 1(b). Show. Therefore, the commands from the NMS are not directly sent to the fan board, but are received by the fan-managed board and then forwarded to the corresponding fan board for speed control.

The fan control mode is the same as that of the second control mode in Figure 1 (b). A fan-managed board is added and the fan board of the active/standby switchover mode is added. The system has a Layer 2 switching function. That is, the system is configured with a 1+1 protection mode. This mode requires two fan-managed boards, which correspond to the main control board and the standby board. At the same time, the fan control can only be controlled by the fan-hosted board that is mainly in the state. When the active/standby status of the two fan-managed boards changes, the control rights of the fan board change. The principle is shown in Figure 2.

The third control method mentioned above introduces two problems:

1. When the active and standby fan-managed boards are powered off at the same time, the fan board is in the managed state. At this time, the fan board is not controlled at all, and the fan board rotates at full speed by default, but the power consumption will increase instantaneously. Actual need The speed of the fan board without any control can be set in some way to optimally find an optimum value between temperature control and power consumption.

2. When the active and standby fan-managed boards are switched, the fan board will be managed for a certain period of time during the process of re-calculation of the Layer 2 MSTP protocol (Multiple Spanning Tree Protocol). The speed will change dramatically in an instant, and this huge change adds a certain amount of uncertainty to the performance of the entire system.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a fan panel fan speed control method and device, which solves the problem that the fan panel fan speed without the independent CPU system cannot be self-controlled and the fan rotates at full speed.

The embodiment of the invention discloses a fan panel fan speed control method, which comprises:

During normal operation of the fan, the fan-managed board transmits the heartbeat signal to the control module placed on the fan board in real time.

When the control module detects that the heartbeat signal is abnormal, the control module controls the fan to rotate according to a preset speed value.

Optionally, in the foregoing method, the control module is implemented by using an Erasable Programmable Logic Device (EPLD).

Optionally, after the control module controls the fan to rotate according to the preset speed value, the method further includes:

When the control module detects that the heartbeat signal returns to normal, the control module stops controlling the fan rotation, and the fan-hosting board controls the fan speed.

Optionally, the foregoing method further includes:

After the fan subrack is powered on, the control module controls the fan to rotate according to a preset speed value before the fan hosting board is not fully activated.

After the fan-hosting board is started normally, the control module stops controlling the fan rotation by the wind. The fan-hosted board controls the fan speed.

The embodiment of the invention further discloses a fan board fan speed control device, which comprises at least a fan-hosting board, and at least a control module disposed on the fan board, wherein:

The fan-hosting board is configured to transmit a heartbeat signal to the control module in real time during normal working of the fan;

The control module is configured to receive the heartbeat signal in real time, and when detecting that the heartbeat signal is abnormal, control the fan to rotate according to a preset speed value.

Optionally, in the above apparatus, the control module is configured to be implemented by an erasable editable logic (EPLD).

Optionally, in the above apparatus, the control module is further configured to: after detecting that the heartbeat signal returns to normal after controlling the fan to rotate according to the preset rotation speed value, stop controlling the fan rotation, and handing the fan to The managed board controls the fan speed.

Optionally, in the foregoing apparatus, the control module is further configured to: after the fan subrack is powered on, before the fan hosting board is not fully started, the control fan rotates according to a preset rotation speed value, and in the After the fan-managed board is started normally, stop controlling the fan rotation and let the fan-managed board control the fan speed.

The embodiment of the invention further provides a computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions, and the fan board fan speed control method is implemented when the computer executable instructions are executed.

The technical solution of the present application solves the problem that the fan speed of the fan board without the independent CPU system is in the process of initializing the power, and the fan speed cannot be self-controlled due to the fan's own EPLD, and the fan speed is selected and the optimal speed is selected. At the same time, the problem that the fan speed instantaneously changes greatly during the active/standby switching process of the fan-hosted board is solved, the power consumption and noise are reduced, and the stability of the system performance is improved.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

Figure 1 (a) is a schematic diagram of a fan control management mode with a minimum system CPU;

Figure 1 (b) is a schematic diagram of a fan control management mode without a minimum system CPU;

2 is a schematic diagram of a third fan control mode of the related art;

3 is a flowchart of a method for controlling a fan speed of a fan board according to Embodiment 1 of the present invention;

4 is a block diagram showing the design of a fan control provided in the first embodiment;

FIG. 5 is a schematic diagram of a control flow of a fan provided in the first embodiment; FIG.

FIG. 6 is a schematic diagram of a fan panel fan speed control device according to Embodiment 2 of the present invention.

detailed description

The technical solutions of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be combined with each other arbitrarily.

Embodiment 1

As shown in FIG. 3, the embodiment provides a fan panel fan speed control method, which mainly includes the following operations:

Step S31: During normal working of the fan, the fan-hosting board transmits a heartbeat signal to the control module placed on the fan board in real time;

Step S32: When the control module detects that the heartbeat signal is abnormal, the control module can control the fan to rotate according to the preset rotation speed value.

Among them, the preset speed value can be obtained experimentally.

In practical applications, the above control module can be implemented by using an EPLD (Erasable Programmable Logic Device) device, that is, introducing a separate EPLD on the fan board, and the EPLD is an integrated circuit, including a series of The programming logic device can be upgraded and downloaded on the network management tube without reconnection, and can be queried through the network management system.

It should be noted that, after the control module controls the fan to rotate according to the preset speed value, if the heartbeat signal is detected to be normal, the control module stops controlling the fan rotation, and the fan-managed board controls the fan speed.

In addition, after the fan subrack is powered on, the control module also controls the fan to follow the preset speed value (the specific speed value can be changed by upgrading the EPLD version) before the fan tray is not fully started. Rotate. Correspondingly, after the fan-hosting board is started normally, the control module stops controlling the fan rotation, and the fan-hosting board controls the fan speed.

The specific implementation of the above method will be described below based on the principle block diagram shown in FIG.

The fan board design in this embodiment has two fans stacked one on top of the other. Therefore, for the fan-managed board, there is one control unit corresponding to each fan. One of the FPGAs (Field-Programmable Gate Array) corresponds to one of the two fans, and one EPLD corresponds to the other of the two fans. The EPLD on the fan board can detect the working status of the fan-managed board through the heartbeat signal (that is, a set of FAN IIC signals in Figure 4). Once the fan-hosting board is abnormal, the fan speed changes greatly in an instant. The fan speed can be controlled by the EPLD placed on the fan board.

In addition, the version-compatible design is also considered in the fan speed control structure in FIG. 4, that is, the version compatibility requires that the old and new versions of the fan board and the fan-hosted board can be inter-plugged and can work normally.

First, the new version of the fan board needs to work with the old version of the fan-hosted board.

For example, the EPLD on the fan board must determine the version of the fan-hosted board to switch the corresponding working mode.

In the case of the old fan-managed board (and the fan-hosted board is not installed), the new fan board does not receive the new version of the command from the IIC (Inter-Integrated Circuit), so it is compatible with the old version. Operating mode. In this mode, the EPLD directly connects the corresponding function pins of the fan-hosted board to the corresponding device (the IIC port of the EEPROM (Electrically Erasable Programmable Read-Only Memory) needs to be equipped with an analog switch. The analog switch is connected to the EEPROM by the backplane IIC by default, and the EPLD receives the new version labeling command and switches to the EPLD control).

Since the EPLD and the EEPROM are simultaneously connected to the backplane IIC port, the EPLD needs to provide an IIC address different from the EEPROM for communication.

When the fan board is in the power-on state, the PWM (Pulse Width Modulation) default speed output is provided by the EPLD (other control signals such as the transparent transmission transparent transmission of the backplane signal are not involved in the control, that is, the fan board is in the Control from the fan-hosted board during power-on initialization The signal does not participate in controlling the fan board), after which there are three possible scenarios.

a. The fan-managed board is not configured: the fan board maintains the above working mode.

b. Configure a new fan-managed board: After the new fan-hosting board is powered on, use the IIC to send the version label and switch the EPLD working mode of the fan board.

c. Configure the old fan-managed board: The green light signal of the monitor panel after the board is powered on, to determine whether the old fan-managed board is in place (note that the new fan-managed board logic should not use the green light of the pin to avoid confusion.) It is recommended that the EPLD of the fan board automatically flashes green light). If a blinking signal of a certain length of time is detected, the old fan-hosted board is considered to be in position, and the PWM signal is directly passed. During normal operation, this signal is also checked to confirm that the fan-hosted board is in position. If the flashing signal is not detected within a period of time, the fan-managed board is not in position, and the PWM signal is cut off and changed to the default PWM signal.

Second, the new version of the fan board is paired with the new version of the fan-hosted board.

After the fan panel is started, the N_ONLINE (board in-position detection mechanism) of the fan-managed board detects that the corresponding fan board is in place. If the read fan type is judged to be a new fan board, it is sent to the fan board through IIC. EPLD version command. The fan board is switched from this command to work in conjunction with the new fan-managed board.

In this mode, the fan board communicates with the fan-managed board through the IIC port, and controls the fan, EEPROM, and temperature measurement chip on the fan board.

Finally, the old version of the fan works with the new version of the fan-hosted board.

After the fan tray is started, the fan tray is detected by the fan tray. After the fan panel is in place, if the fan type is judged to be the old fan board, the old fan board working mode is used. That is, the logic of the original fan-managed board can be. In this mode, there is no default speed and the original noise problem cannot be solved.

The specific process of the fan speed control will be described below with reference to FIG. 5, and the process includes the following operations:

In step 401, the fan board is not controlled by the fan-managed board. The fan board itself controls the fan speed (the fan size controlled by the EPLD can be changed by upgrading the EPLD version).

Step 402: Determine whether the fan-hosting board is started normally, if the fan-managed board is normal. Start, go to step 403, if the fan-managed board fails to start normally, the fan control is always controlled by the EPLD, and repeat this step 402;

Step 403: The fan control right is controlled by the EPLD to be managed by the fan-hosting board;

In step 404, the fan-hosting board works in real time to determine whether the heartbeat signal of the fan-hosted board is normal. If it is normal, the fan-managed board controls the fan speed and repeats this step. If not, the fan speed is controlled by the EPLD. And repeat this step.

Among them, in the operation of the fan-managed board, the abnormal heartbeat signal generally has the following types:

If the active/standby switchover is required, the heartbeat signal of the fan-managed board is abnormal. The fan control is controlled by the EPLD. The switchover ends and the fan control is changed to the fan-managed board. Control

When the fan is running on the board, if the software is running and the watchdog is not working properly, the heartbeat signal of the fan-managed board is abnormal. At this time, the fan control is controlled by the EPLD.

During the switchover of the active and standby fans, the heartbeat signal of the fan-hosted board is abnormal during the storage time of the MSTP recalculation. The fan speed is controlled by the EPLD on the fan board.

The subrack control board software design should also have a heartbeat mechanism (when working with the new fan-managed board). When the software is running and the watchdog is not working properly, the heartbeat signal of the fan-managed board is abnormal. The hardware (programmable logic device) circuit should be able to automatically switch to the default speed controlled by the EPLD, that is, the EPLD controls the fan rotation according to the preset speed value.

Embodiment 2

As shown in FIG. 6 , the embodiment provides a fan panel fan speed control device, which includes at least a fan-hosted single board and a control module disposed on the fan board.

The fan-hosting board is configured to transmit a heartbeat signal to the control module in real time during normal working of the fan.

The control module is configured to receive the heartbeat signal transmitted by the fan-hosted board in real time, and when the heartbeat signal is abnormal, control the fan to rotate according to the preset speed value.

Alternatively, the control module may be implemented by using a device such as an EPLD, which is not limited in this embodiment.

In addition, the control module is further configured to: after controlling the fan to rotate according to the preset speed value, If the heartbeat signal is detected to be normal, stop controlling the fan rotation and let the fan-hosting board control the fan speed.

The control module is also configured to: after the fan subrack is powered on, the fan is controlled to rotate according to the preset speed value, and the fan rotation is stopped after the fan tray is started. The fan-managed board is used to control the fan speed.

Optionally, the control module (such as an EPLD) placed on the fan board can communicate with the fan-hosted board through an IIC (Inter-Integrated Circuit) serial port, thereby accepting the configuration of the fan-hosted board and transmitting the return speed. And other information.

The control module can also be configured to receive fan-managed board upgrade logic operations through the JTAG (Joint Test Action Group) download interface.

Connect the fan's PWM and FG (PWM and FG here refers to the fan detection and monitoring signal) signal, according to the fan-managed board configuration, output the corresponding PWM signal to control the fan speed. At the same time, the fan speed can be detected for the fan to be managed by the board.

The fan-managed board provides control of the indicator light on the fan-slot panel. It also provides access to the EEPROM (a chip that stores data) on the fan board, access to the temperature measurement chip, and information to the fan-hosted board.

This embodiment provides a version compatible signal and can be version compatible.

The device provided in this embodiment can implement the fan speed control method in the first embodiment. For the detailed description of the device, refer to the corresponding content in the first embodiment, and details are not described herein.

It can be seen from the foregoing embodiment that the fan-hosting board of the present invention is used in the case where the fan-hosting board software is running, the fan-hosting board is switched, and the fan-hosting board is powered on. In the abnormal situation, the fan speed can be controlled by the control module on the fan board, which solves the problem that the fan speed changes greatly instantaneously, and is optimal in terms of power consumption, noise, and stability of system performance.

In addition, an embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and the computer executable instructions are implemented to implement the fan board fan speed control method.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions. This application is not limited to any specific combination of hardware and software. The above descriptions are only preferred examples of the present application and are not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Industrial applicability

The embodiment of the invention provides a fan panel fan speed control method and device, which solves the problem that the fan board without the independent CPU system is in the process of power-on initialization, the fan speed cannot be self-controlled, and the fan full speed is solved, and the fan is solved at the same time. During the active/standby switchover of the managed board, the fan speed suddenly changes greatly, which reduces power consumption and noise, and improves system performance stability.

Claims

A fan board fan speed control method, the method comprising:

During normal operation of the fan, the fan-managed board transmits the heartbeat signal to the control module placed on the fan board in real time.

When the control module detects that the heartbeat signal is abnormal, the control module controls the fan to rotate according to a preset speed value.
The method of claim 1 wherein said control module is implemented using an erasable editable logic device EPLD.
The method of claim 1 or 2, after the control module controls the fan to rotate according to the preset speed value, the method further includes:

When the control module detects that the heartbeat signal returns to normal, the control module stops controlling the fan rotation, and the fan-hosting board controls the fan speed.
The method of claim 3, further comprising:

After the fan subrack is powered on, the control module controls the fan to rotate according to a preset speed value before the fan hosting board is not fully activated.

After the fan-hosting board is started normally, the control module stops controlling the fan rotation, and the fan-hosting board controls the fan speed.
A fan board fan speed control device includes a fan-hosting board and a control module disposed on the fan board, wherein:

The fan-hosting board is configured to transmit a heartbeat signal to the control module in real time during normal working of the fan;

The control module is configured to receive the heartbeat signal in real time, and when detecting that the heartbeat signal is abnormal, control the fan to rotate according to a preset speed value.
The apparatus of claim 5 wherein said control module is configured to be implemented using an erasable editable logic device EPLD.
The apparatus according to claim 5 or 6, wherein

The control module is further configured to: after controlling the fan to rotate according to the preset speed value, If it is detected that the heartbeat signal returns to normal, the control of the fan rotation is stopped, and the fan-hosting board is controlled to control the fan speed.
The apparatus according to claim 7, wherein

The control module is further configured to: after the fan subrack is powered on, the fan is controlled to rotate according to the preset rotation speed value, and after the fan hosting board is started normally, Stop controlling the fan rotation, and the fan-hosting board controls the fan speed.
A computer readable storage medium having stored therein computer executable instructions that, when executed, implement the method of any one of claims 1 to 4.