CN115898932A - Fan, operation method thereof, electronic device and readable storage medium - Google Patents

Abstract

The embodiment of the invention provides a fan and an operation method thereof, electronic equipment and a readable storage medium, wherein the fan comprises a driving circuit, a controller and a motor, the driving circuit drives a rotor of the motor to rotate, the controller is connected with an upper end, a fan management bus control protocol is arranged at the controller and the upper end, a working mode is arranged on the fan management bus control protocol, and the working mode comprises a PWM (pulse-width modulation) control mode and a command control mode; when the working mode of the controller and the upper end is a PWM control mode, the rotor rotating speed of the rotor is controlled by a PWM signal sent to the controller by the upper end, and the rotor rotating speed of the rotor corresponding to the controller is fed back by a TACH signal output to the upper end by the controller; and when the working mode of the controller and the upper terminal is a command control mode, the CLK signal and the DAT signal are sent to the controller through the upper terminal, so that the controller executes a control command formed by the CLK signal and the DAT signal.

Description

A fan and its operating method, electronic device and readable storage medium

technical field

The embodiments of the present invention relate to the field of communication technologies, and in particular, relate to a fan and its operating method, an electronic device, and a computer-readable storage medium.

Background technique

At present, the server is compact in structure and generates a lot of heat. There are multiple cooling fans inside for active cooling. The stable operation of the fans is crucial to the normal operation of the server. Common server cooling fans are powered by the 12V power supply of the motherboard and are powered by the BMC on the motherboard. (Baseboard Management Controller Baseboard Management Controller) or CPLD (Complex Programmable Logic Device Programmable Logic Device) for speed control and speed reading.

With the continuous upgrade of the server management system, the monitoring of the server's operating status is continuously refined, but most of the server cooling fans currently used only have the feedback of the speed information, usually the upper end obtains the fan speed through the TACH (Tachometer tachometer) signal Therefore, the working status of the fan can only be judged indirectly through the rotational speed, which cannot meet the more and more sophisticated monitoring requirements of the server's running status. In addition, some fans indicate the running status of the fan by adding signal lines, such as adding a "fault signal" to indicate whether the fan is working abnormally, and adding a "speed adjustment completion signal" to indicate that the fan speed has reached the set value. However, adding a signal line requires changing the existing hardware interface, which cannot be compatible with the existing system.

Contents of the invention

Embodiments of the present invention provide a fan and its operating method, electronic equipment, and a computer-readable storage medium to solve the problem that in the prior art, the working state of the fan can only be judged indirectly through the rotational speed, which cannot satisfy the increasingly finer operating state of the server. Monitoring requirements, and changing the existing hardware interface, can not be compatible with the existing system.

The embodiment of the present invention discloses a fan, including a drive circuit, a controller and a motor, the drive circuit drives the rotor of the motor to rotate, the controller is connected to the upper end, and the controller and the upper end are set There is a fan management bus control protocol, the fan management bus control protocol is set with a working mode, and the working mode includes a PWM control mode and a command control mode;

When the working mode of the controller and the upper end is the PWM control mode, the PWM signal sent by the upper end to the controller is used to control the rotor speed of the rotor, and the controller outputting the TACH signal to the upper end to feed back the rotor speed of the rotor corresponding to the controller;

When the working mode of the controller and the upper end is the command control mode, the CLK signal and the DAT signal are sent to the controller through the upper end, so that the controller executes the CLK signal and the DAT signal. The DAT signal forms the control command.

Optionally, include:

The upper end is connected to the PWM input detection interface of the controller and the CLK interface of the two-wire serial communication through the PWM/CLK signal line, and the upper end is connected to the controller through the TACH/DAT signal line. TACH signal output interface and DAT interface for two-wire serial communication.

Optionally, include:

When the working mode of the controller and the upper end is the PWM control mode, the PWM signal sent by the upper end through the PWM/CLK signal line is received through the PWM input detection interface of the controller, so that The controller controls the rotor speed of the rotor according to the PWM signal, and outputs the TACH signal to the TACH/DAT signal line of the upper end through the TACH signal output interface of the controller, so as to feed back the TACH signal to the upper end. The rotor speed of the rotor corresponding to the controller;

When the working mode of the controller and the upper end is the command control mode, the controller receives the PWM/CLK signal from the upper end through the CLK interface of the two-wire serial communication of the controller The CLK signal sent by the line, and the controller receives the DAT signal sent by the upper end through the TACH/DAT signal line through the DAT interface of the two-wire serial communication of the controller, so that the controller Execute the control command formed by the CLK signal and the DAT signal.

Optionally, the controller is configured to generate a drive signal of the motor according to the rotor position of the rotor and a sampling signal, so as to control the drive circuit to drive the motor to rotate the rotor according to the drive signal; wherein, The sampling signal is at least a voltage and/or current signal.

Optionally, the PWM signal includes a duty ratio of the PWM signal, and the duty ratio of the PWM signal is used to control the rotor speed of the rotor.

Optionally, the PWM signal sent to the controller through the upper end to control the rotor speed of the rotor includes:

When the working mode of the controller and the upper end is the PWM control mode, the upper end sends a PWM signal to the controller;

According to the duty ratio of the PWM signal in the PWM signal, the rotor speed of the rotor corresponding to the controller is controlled.

Optionally, the TACH signal output by the controller to the upper end to feed back the rotor speed of the rotor corresponding to the controller includes:

When the working mode of the controller and the upper end is the PWM control mode, the controller sends a TACH signal to the upper end;

The frequency of the TACH signal of the TACH signal is measured to obtain the rotor speed of the rotor.

Optionally, include:

When the working mode of the controller and the upper end is the PWM control mode, within the preset unit time, the upper end sends a PWM signal to the controller; wherein, the PWM signal among the plurality of PWM signals The duty cycle constitutes a PWM signal duty cycle sequence;

The controller monitors whether the PWM signal duty ratio sequence is the first preset PWM signal duty ratio sequence;

If the PWM signal duty cycle sequence is a first preset PWM signal duty cycle sequence, then determine that the PWM signal contains handshake information;

The controller returns response information to the upper end for the handshake information; wherein the response information includes verification information, and the verification information is used to verify whether the response information is correct;

If it is verified that the response information is correct, the upper end sends a mode switching signal to the controller;

The PWM control mode is switched to a command control mode according to the mode switching signal.

Optionally, the response information is a preset TACH signal frequency sequence, and the mode switching signal is a preset second PWM signal duty cycle sequence.

Optionally, include:

If the controller does not return response information for the PWM signal, the upper end sends the PWM signal to the controller again;

If the controller does not return response information to the resent PWM signal, the controller does not support the command control mode, and the controller and the upper end maintain the PWM control mode.

Optionally, include:

Within a preset unit time, if the controller does not receive the PWM signal containing the handshake information, the upper end does not support the command control mode, and the controller and the upper end maintain the The PWM control mode described above.

Optionally, after switching the PWM control mode to the command control mode according to the mode switching signal, the method further includes:

When the working mode of the controller and the upper end is the command control mode, the upper end sends a query command to the controller at a preset unit time interval; wherein the query command is used to check data communication Whether it is smooth;

If the response time corresponding to the response information sent by the controller to the upper end exceeds the preset response time, the upper end sends a query command to the controller again;

If the response time of the controller to the query command exceeds the preset response time again, the upper end switches to the PWM control mode.

Optionally, after the controller switches to the PWM control mode if the response time of the controller to the query command exceeds the preset response time again, the method further includes:

If the controller is still in the command control mode, after exceeding the preset unit time, the controller will automatically switch to the PWM control mode, and use the duty cycle of the PWM signal to control the corresponding Rotor speed regulation.

Optionally, the control command is used to obtain the basic information of the fan, and the basic information of the fan includes at least: fan model, manufacturer code, fan ID, hardware and software version, maximum speed, minimum speed, rated voltage, rated power , rated air volume and rated static pressure.

Optionally, the control command is also used to obtain real-time operation data of the fan, the real-time operation data of the fan at least includes: target speed, actual speed, steering direction, speed adjustment completion flag, voltage, current, power, wind pressure and Run time.

Optionally, the control command is further used to obtain fan fault information, and the fan fault information includes at least: Hall fault, MOS fault, overvoltage, undervoltage, overcurrent and locked rotor.

Optionally, the control command is also used to modify fan parameters, and the fan parameters at least include: a user-defined maximum rotation speed, a minimum rotation speed, a maximum current, a duty ratio rotation speed coefficient, and a default rotation speed when there is no control signal.

The embodiment of the invention also discloses a fan operation method, the fan includes a drive circuit, a controller and a motor, the drive circuit drives the rotor of the motor to rotate, the controller is connected to the upper end, the control The controller and the upper end are provided with a fan management bus control protocol, and the fan management bus control protocol is provided with a working mode, the working mode includes a PWM control mode and a command control mode, and the method includes:

When the working mode of the controller and the upper end is the PWM control mode, the PWM signal sent by the upper end to the controller is used to control the rotor speed of the rotor, and the controller Outputting a TACH signal to the upper end to feed back the rotor speed of the rotor corresponding to the controller;

When the working mode of the controller and the upper end is the command control mode, the CLK signal and the DAT signal are sent to the controller through the upper end, so that the controller executes the CLK signal and the DAT signal. The DAT signal forms the control command.

The embodiment of the present invention also discloses an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete mutual communication through the communication bus;

The memory is used to store computer programs;

The processor is configured to implement the method described in the embodiment of the present invention when executing the program stored in the memory.

The embodiment of the present invention also discloses a computer-readable storage medium, on which instructions are stored, and when executed by one or more processors, the processors execute the method described in the embodiment of the present invention.

Embodiments of the present invention include the following advantages:

In an embodiment of the present invention, a fan is provided, including a drive circuit, a controller and a motor, the drive circuit drives the rotor of the motor to rotate, the controller is connected to the upper end, wherein the controller and the upper end are provided with a fan management bus control Protocol, the fan management bus control protocol is set with a working mode, the working mode includes PWM control mode and command control mode; when the working mode of the controller and the upper end is PWM control mode, the PWM signal sent to the controller by the upper end to control the rotor The rotor speed of the rotor, and the TACH signal output by the controller to the upper end is used to feed back the rotor speed of the rotor corresponding to the controller; when the working mode of the controller and the upper end is command control mode, the CLK sent to the controller by the upper end signal and DAT signal, so that the controller executes the control command formed by CLK signal and DAT signal. The fan provided by the above-mentioned embodiments of the present invention does not need to change the hardware circuit and interface of the existing upper end, and develops the fan management bus control protocol by multiplexing the existing signal lines, increasing the communication control function between the upper end and the controller of the fan, Compatibility with the existing system is guaranteed. In addition, the detailed operation data of the fan can be obtained through the controller to execute the control command formed by the CLK signal and the DAT signal, and the operation status of the fan can be better monitored.

Description of drawings

FIG. 1 is a schematic diagram of an existing fan control scheme provided in an embodiment of the present invention;

Fig. 2 is a schematic diagram of the internal structure of a conventional fan provided in an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a fan provided in an embodiment of the present invention;

Fig. 4 is a schematic diagram of the internal structure of a fan provided in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a switching flow of a fan control mode provided in an embodiment of the present invention;

Fig. 6 is a flowchart of steps of a method for operating a fan provided in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a computer-readable storage medium provided in an embodiment of the present invention;

Fig. 8 is a schematic diagram of a hardware structure of an electronic device implementing various embodiments of the present invention.

Reference signs: 1. fan; 2. drive circuit; 3. controller; 4. motor; 5. upper end.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present invention, some technical features involved in the embodiments of the present invention are explained below:

BMC (Baseboard Management Controller Baseboard Management Controller), which is a dedicated microcontroller embedded on the motherboard of a computer (usually a server), BMC is responsible for managing the interface between the system management software and the platform hardware.

CPLD (Complex Programmable Logic Device Programmable Logic Device), which is a digital integrated circuit in which users can construct logic functions according to their own needs, and its basic design method is to use integrated development software platforms, schematic diagrams, hardware description languages, etc. , generate the corresponding target file, and transfer the code to the target chip through the download cable to realize the designed digital system.

As an example, with the continuous upgrade of the server management system, the monitoring of the server running status is continuously refined, but most of the server cooling fans currently used only have the feedback of the speed information, usually through the TACH (Tachometer tachometer) signal at the upper end Therefore, the working status of the fan can only be judged indirectly through the rotating speed, which cannot meet the more and more sophisticated monitoring requirements of the server's running status. In addition, some fans indicate the running status of the fan by adding signal lines, such as adding a "fault signal" to indicate whether the fan is working abnormally, and adding a "speed adjustment completion signal" to indicate that the fan speed has reached the set value. However, adding a signal line requires changing the existing hardware interface, which cannot be compatible with the existing system.

In the existing server system, the server system usually includes multiple fans. According to different heat dissipation requirements, the cooling fan can be a single-rotor fan or a dual-rotor fan. The structure of the dual-rotor fan is composed of two back-to-back single-rotor fans. , the front and rear rotors work in the same principle.

Referring to Fig. 1, it shows a schematic diagram of an existing fan control scheme provided in an embodiment of the present invention. It can be seen from the figure that in the existing scheme, the fan power supply is provided by the 12V power supply of the motherboard, and at the fan power supply interface of the motherboard Equipped with eFuse (electronic fuse) for over-current protection, which can prevent the fan from over-current and short-circuit faults that will affect the 12V power supply of the motherboard. The upper end in the figure can be expressed as BMC/CPLD, and BMC/CPLD and each rotor fan can be connected through PWM (PWM (Pulse Width Modulation) signal line and TACH (Tachometer tachometer) signal line, among them, For a dual-rotor fan, the PWM signal lines of the front and rear rotors are connected in parallel, and the TACH signal lines are independent. The BMC/CPLD sends different PWM signal duty ratios to the fans to control the set speed of the fans. At the same time, the BMC/CPLD returns The frequency of the TACH signal can be converted to get the actual speed of the fan.

Specifically, taking the existing single-rotor fan as an example, the cooling fan is composed of fan blades and a frame structure, a motor, and a control circuit. The fan motor is usually a brushless DC motor, and the driving circuit is a three-phase half-bridge structure. controller to control. Referring to Fig. 2, it shows a schematic diagram of the internal structure of an existing fan provided in the embodiment of the present invention. As shown in the figure, the controller can calculate and generate Drive signal to control the rotation of the fan; among them, the PWM input pin of the controller can be used to obtain the set speed of the fan, the controller can measure the duty cycle of the PWM signal of the input PWM signal, and the TACH signal can be used to output the fan The actual speed of the TACH signal is proportional to the actual speed of the fan. The BMC/CPLD at the upper end can convert the actual speed of the fan by measuring the frequency of the TACH signal.

It can be seen from the above that in the existing fan control mode, the upper-end BMC/CPLD obtains the speed information of the fan through the TACH signal, and can only indirectly judge the working status of the fan through the speed, which cannot meet the more and more refined running status monitoring requirements of the server. ; In addition, some fans need to change the existing hardware interface by adding signal lines, which cannot be compatible with the existing system.

In this regard, one of the core inventive points of the present invention is to provide a fan, including a controller and a motor, the drive circuit drives the rotor of the motor to rotate, and the controller is connected to the upper end, wherein the controller and the upper end are provided with a fan Management bus control protocol, the fan management bus control protocol is set with working modes, the working modes include PWM control mode and command control mode; when the working mode of the controller and the upper end is PWM control mode, the PWM signal sent to the controller through the upper end To control the rotor speed of the rotor, and, through the TACH signal output by the controller to the upper end, feedback the rotor speed of the rotor corresponding to the controller; when the working mode of the controller and the upper end is command control mode, through the upper end to the controller Send the CLK signal and DAT signal to make the controller execute the control command formed by the CLK signal and DAT signal. The fan provided by the above-mentioned embodiments of the present invention does not need to change the hardware circuit and interface of the existing upper end, and develops the fan management bus control protocol by multiplexing the existing signal lines, increasing the communication control function between the upper end and the controller of the fan, Compatibility with the existing system is guaranteed. In addition, the detailed operation data of the fan can be obtained through the controller to execute the control command formed by the CLK signal and the DAT signal, and the operation status of the fan can be better monitored.

Referring to FIG. 3 , it shows a schematic structural diagram of a fan provided in an embodiment of the present invention. The fan includes a drive circuit, a controller, and a motor. The drive circuit drives the rotor of the motor to rotate. The controller and the upper end connection, the controller and the upper end are provided with a fan management bus control protocol, and the fan management bus control protocol is provided with a working mode, and the working mode includes a PWM control mode and a command control mode;

When the working mode of the controller and the upper end is the PWM control mode, the PWM signal sent by the upper end to the controller is used to control the rotor speed of the rotor, and the controller outputting the TACH signal to the upper end to feed back the rotor speed of the rotor corresponding to the controller;

When the working mode of the controller and the upper end is the command control mode, the CLK signal and the DAT signal are sent to the controller through the upper end, so that the controller executes the CLK signal and the DAT signal. The DAT signal forms the control command.

Among them, for the command control mode of the fan management bus control protocol, it can use two-wire serial communication, and for the data transmission format used in the communication, it can use the format defined by the I2C (Inter-Integrated Circuit) protocol, or A custom format can be used, and those skilled in the art can make adjustments according to actual conditions, which is not limited in this embodiment of the present invention.

For the driving circuit, it can drive the motor to rotate the rotor through the driving signal; wherein, the rotor is a part of the fan, which is connected with the blade of the fan, that is, the rotation of the rotor indicates that the fan starts to rotate; for the rotor speed, it can indicate is the fan speed of the fan; for the rotor position, it can be obtained by a rotor position sensor. It should be noted that, for the method of obtaining the rotor position, those skilled in the art can select an appropriate device to obtain it according to actual needs. This is not limited.

Among them, the controller of the fan is connected to the upper end, and the upper end is connected to the PWM input detection interface of the controller and the CLK (clock) interface of the two-wire serial communication through the PWM/CLK signal line, and the upper end is connected through the TACH/DAT signal The line is connected to the TACH signal output interface of the controller and the DAT (data) interface of the two-wire serial communication.

For the upper end, it can be the upper end of the server, and the upper end of the server usually uses BMC or CPLD to control the fan; it should be noted that, for the upper end, it can be the upper end of the server, or other The upper end of the terminal, which is not limited in this embodiment of the present invention.

For the controller, it can be MCU (Microcontroller Unit microcontroller), which can calculate and generate the corresponding driving signal of the motor according to the measured rotor position and sampling signal. At the same time, the controller can also measure the PWM signal duty of the PWM signal Ratio; wherein, the sampling signal can be a voltage and/or current signal; for the PWM signal, it is a fan speed control signal sent from the upper end to the fan controller, the PWM signal includes the PWM signal duty cycle, and the PWM signal duty cycle The duty ratio can be used to control the rotor speed of the rotor, that is, the fan speed of the fan; wherein, the duty ratio is the ratio of the power-on time to the total time in a pulse cycle.

For the PWM input detection interface, it can be used to obtain the PWM signal sent from the upper end to the controller, that is, to obtain the set speed of the rotor, and then the controller can control the speed of the rotor in the fan according to the set speed, that is, the fan of the fan Rotating speed.

Among them, the TACH signal can be used to output the actual speed of the rotor, that is, the actual speed of the fan. Specifically, when the controller in the fan sends the TACH signal to the upper end, the upper end can measure the signal frequency of the TACH signal, and then the signal Convert the frequency to get the actual speed of the fan.

It should be noted that, the method for converting the signal frequency of the TACH signal can be adjusted by those skilled in the art according to actual needs, which is not limited in this embodiment of the present invention.

As for the CLK signal and the DAT signal, it may be a signal for data communication.

It should be noted that for the circuit design of the upper-end motherboard, if the upper-end is CPLD, no hardware modification is required; if the upper-end is BMC, it is necessary to ensure that the upper-end is connected to the PWM/CLK and TACH/DAT pins. communication function.

In a specific implementation, when the working mode of the controller and the upper end is PWM control mode, the upper end in the server sends a PWM signal to the controller in the fan, and the fan can receive the upper end through the PWM/ The PWM signal sent by the CLK signal line, so that the controller can control the rotor speed of the rotor according to the PWM signal, that is, control the fan speed of the fan, and output the TACH signal to the TACH/DAT signal line of the upper end through the TACH signal output interface of the controller. Feedback the rotor speed of the rotor corresponding to the controller to the upper end, that is, the fan speed can be obtained through the TACH signal fed back by the controller; when the working mode of the controller and the upper end is command control mode, connect the PWM/CLK signal line of the upper end The signal in the switch is switched from PWM signal to CLK signal, and the signal in the TACH/DAT signal line connected to the upper end is switched from TACH signal to DAT signal, so that the controller can receive the upper end through the CLK interface of the two-wire serial communication of the controller. The CLK signal sent by the PWM/CLK signal line, and the controller receives the DAT signal sent by the upper end through the TACH/DAT signal line through the DAT interface of the two-wire serial communication of the controller, wherein the CLK signal and the DAT signal can be used for Data communication, so that the controller executes the control command formed by the CLK signal and the DAT signal. The fan provided by the above-mentioned embodiments of the present invention does not need to change the hardware circuit and interface of the existing upper end, and develops the fan management bus control protocol by multiplexing the existing signal lines, increasing the communication control function between the upper end and the controller of the fan, Compatibility with the existing system is guaranteed. In addition, the detailed operation data of the fan can be obtained through the controller to execute the control command formed by the CLK signal and the DAT signal, and the operation status of the fan can be better monitored.

Referring to FIG. 4 , it shows a schematic diagram of the internal structure of a fan provided in an embodiment of the present invention. The internal structure of the fan in the figure is a fan circuit structure that supports the fan management bus control protocol. As shown in the figure, the power supply of the fan is provided by the server The 12V power supply of the motherboard is provided, and the upper end is connected to the PWM input detection interface of the controller and the CLK interface of the two-wire serial communication through the PWM/CLK signal line, and the upper end is connected to the TACH signal of the controller through the TACH/DAT signal line Output interface and DAT interface for two-wire serial communication. In the PWM control mode, the two signal lines can be PWM input and TACH output respectively, that is, the PWM/CLK signal line inputs the PWM signal, and the TACH/DAT signal line outputs the TACH signal, which is the same as the above-mentioned existing traditional fan; but The working mode in the embodiment of the present invention also has a command control mode. When the fan works in the command control mode, the two signal lines are used for data communication, and the controller receives the upper end through the DAT interface of the two-wire serial communication of the controller. The DAT signal sent by the TACH/DAT signal line can execute the control command formed by the CLK signal and the DAT signal through the controller, so that detailed operating data of the fan can be obtained, and the operating status of the fan can be better monitored.

In one example, assume that the server system is connected to a dual-rotor fan, and the upper end is a BMC/CPLD. In the PWM control mode, the upper end BMC/CPLD can send a PWM signal to the controller, and at the same time collect feedback from the controller. The two TACH signals of the front and rear rotors of the fan, where the front and rear rotors of the fan can share a PWM signal, and the speed of the rotor can be controlled through the duty cycle of the PWM signal, that is, the speed of the fan is controlled, but the TACH signals of the front and rear rotors of the fan need Each feeds back to the upper end, that is, the TACH signal fed back by the controller can be used to obtain the fan speed; when the fan is switched to command control mode, the PWM signal and TACH signal will be switched to CLK signal and DAT signal, and the front and rear rotors can be defined at the same time. The communication addresses are 1 and 2 respectively, the front and rear rotors will share one CLK signal, the two TACH signal lines are switched to two DAT signals, and the upper end can send commands to the front and rear rotors at the same time through the CLK signal, and the command contains address information , the controller of the corresponding fan responds, and returns data to the upper end through the DAT signal, and the upper end will monitor the two DAT signals while receiving the data, and read the returned data.

It should be noted that in the dual-rotor fan, since the DAT signal is independent, data may not be synchronized. Therefore, when only the controller of the fan sends data to the upper end of the server, the communication interface of the upper end needs to be simultaneously To read the DAT signal of the DAT signal line corresponding to the front and rear rotors of the dual-rotor fan, it is necessary to detect the DAT signal to ensure the source information of the DAT.

It is worth mentioning that, according to application requirements, the fan management bus control protocol can support multiple fans to be placed on the same bus. Such applications need to add an address resolution protocol to achieve dynamic address allocation, but multiple fans are placed on the same bus. The same bus will not be compatible with PWM control mode, and will be in command control mode.

For the control command, it can be used to obtain the basic information of the fan, wherein the basic information of the fan can at least include: fan model, manufacturer code, fan ID, hardware and software version, maximum speed, minimum speed, rated voltage, rated power, Rated air volume and rated static pressure. In addition, the control command can also be used to obtain the real-time operation data of the fan, wherein the real-time operation data of the fan can at least include: target speed, actual speed, steering direction, sign of completion of speed regulation, voltage, current, power, wind pressure and running time .

In one example, assuming that what needs to be obtained is the fan model and manufacturer code of the fan, a control command can be sent to the controller of the fan through the CLK signal through the upper end, and the controller of the fan can send DAT to the upper end according to the control command Signal, that is, return the fan model and manufacturer code of the fan that needs to be obtained from the upper end; in the same way, assuming the target speed and actual speed of the fan that needs to be obtained, you can send control to the fan controller through the upper end through the CLK signal command, the controller of the fan can send a DAT signal to the upper end according to the control command, that is, return the target speed and the actual speed of the fan that the upper end needs to obtain.

In the embodiment of the present invention, after the controller executes the control command formed by the CLK signal and the DAT signal to obtain the basic information of the fan corresponding to the rotor and the real-time operation data of the fan, the upper end can return the basic information of the fan corresponding to the rotor and the fan’s Real-time operation data, data communication can be realized under the joint action of CLK signal and DAT signal, the upper end can judge the operation status of the fan through the acquired basic information of the fan and the real-time operation data of the fan, by adding the upper end BMC/CPLD The communication control function with the fan controller, based on the communication control function, can realize the basic information of the fan and the real-time operation data function of the fan, and can better judge the real-time operation status of the fan.

As for the control command, it can also be used to modify fan parameters, and the fan parameters at least include: user-defined maximum speed, minimum speed, maximum current, duty cycle speed coefficient and default speed when there is no control signal.

In an example, assuming that the maximum current of the fan needs to be modified, a control command can be sent to the controller of the fan through the CLK signal and the DAT signal through the upper terminal, and the controller of the fan can set or set the maximum current of the fan according to the control command. Revise.

In the embodiment of the present invention, after the controller executes the control command formed by the CLK signal and the DAT signal, the parameters of the fan corresponding to the rotor can be set, and the control protocol is developed by multiplexing the existing signal line, and the upper end BMC/CPLD and The communication control function between the fan controllers, based on the communication control function, can provide the function of parameter setting and debugging, and the upper end can be modified as needed to adapt to the heat dissipation requirements of different servers.

As for the control command, it can also be used to obtain fan fault information, wherein the fan fault information can at least include: Hall fault, MOS fault, overvoltage, undervoltage, overcurrent and locked rotor.

Wherein, the historical operation data of the fan, that is, the real-time operation data before the failure of the fan, can be stored in the charged erasable programmable read-only memory integrated in the controller.

In one example, assuming that there is currently a Hall fault, the fan can collect the fault information and feed it back to the upper end through the DAT signal, and the upper end can read the historical operation data of the fan in the chargeable erasable programmable The fan's historical operation data analyzes the cause of the fan's failure, so as to formulate an effective solution.

In a specific implementation, when the working mode of the controller and the upper end is the command control mode, if the fan fails, the controller collects the fault information when the fan is running, obtains the alarm information according to the fault information, and combines the fault information with the alarm The information is sent to the upper end, and the upper end can analyze the cause of the failure of the fan based on the historical operation data of the fan by reading the historical operation data of the fan in the electrically erasable programmable read-only memory, so as to formulate an effective solution.

In an embodiment of the present invention, a fan is provided, including a drive circuit, a controller and a motor. The drive circuit drives the rotor of the motor to rotate. The PWM input detection interface of the controller and the CLK interface of the two-wire serial communication, and the upper end is connected to the TACH signal output interface of the controller and the DAT interface of the two-wire serial communication through the TACH/DAT signal line; among them, the controller and The upper end is set with a fan management bus control protocol, and the fan management bus control protocol is set with a working mode, the working mode includes PWM control mode and command control mode; when the working mode of the controller and the upper end is PWM control mode, through the PWM of the controller The input detection interface receives the PWM signal sent by the upper end through the PWM/CLK signal line, so that the controller can control the rotor speed of the rotor according to the PWM signal, and output the TACH signal to the TACH/DAT signal line of the upper end through the TACH signal output interface of the controller , to feed back the rotor speed of the rotor corresponding to the controller to the upper end; when the working mode of the controller and the upper end is command control mode, the controller receives the upper end through the CLK interface of the two-wire serial communication of the controller through PWM/CLK The CLK signal sent by the signal line, and the controller receives the DAT signal sent by the upper end through the TACH/DAT signal line through the DAT interface of the two-wire serial communication of the controller, so that the controller performs the control formed by the CLK signal and the DAT signal Order. The fan provided by the above-mentioned embodiments of the present invention does not need to change the hardware circuit and interface of the existing upper end, and develops the fan management bus control protocol by multiplexing the existing signal lines, increasing the communication control function between the upper end and the controller of the fan, Compatibility with the existing system is guaranteed. In addition, the detailed operating data of the fan can be obtained through the controller executing the control command formed by the CLK signal and the DAT signal, and the operating status of the fan can be better monitored.

Specifically, based on increasing the communication control function between the upper end and the controller of the fan, the upper end can read basic information such as fan specification parameters, real-time operating data, fault alarm information, and can modify and debug fan parameters. The fan power consumption obtained by the running data can be more accurate than the existing scheme, which is convenient for server power consumption control. By reading the fan running time, the life of the fan can be managed, and the fault diagnosis and prediction can be carried out by analyzing the running data. To achieve early warning, and by modifying the fan's maximum speed, minimum speed, maximum current and other parameters, it can adapt to the heat dissipation requirements of different servers.

In an optional embodiment of the present invention, the PWM signal sent to the controller through the upper terminal to control the rotor speed of the rotor includes:

When the working mode of the controller and the upper end is the PWM control mode, the upper end sends a PWM signal to the controller;

According to the duty ratio of the PWM signal in the PWM signal, the rotor speed of the rotor corresponding to the controller is controlled.

In a specific implementation, when the working mode of the controller and the upper end is PWM control mode, the upper end in the server sends a PWM signal to the controller in the fan, and the fan can receive the upper end through the PWM/ The PWM signal sent by the CLK signal line can make the controller control the rotor speed of the rotor according to the PWM signal according to the duty ratio of the PWM signal in the PWM signal, that is, control the fan speed of the fan.

In one example, assuming that the duty cycle of 0%-100% corresponds to the minimum speed of the fan to the maximum speed, the controller in the fan can adjust the fan speed of the fan according to the measured duty cycle of the PWM signal. The signal duty cycle in the received PWM signal is 70%. Then the controller can adjust according to the set speed of the fan corresponding to the preset duty ratio.

In an optional embodiment of the present invention, the TACH signal output by the controller to the upper end to feed back the rotor speed of the rotor corresponding to the controller includes:

When the working mode of the controller and the upper end is the PWM control mode, the controller sends a TACH signal to the upper end;

The frequency of the TACH signal of the TACH signal is measured to obtain the rotor speed of the rotor.

In the specific implementation, after the controller of the fan receives the PWM signal sent by the upper end and adjusts the speed of the rotor, the controller outputs the TACH signal to the TACH/DAT signal line of the upper end through the TACH signal output interface to the upper end. Feedback the rotor speed of the rotor corresponding to the controller, that is, the fan speed can be obtained through the TACH signal fed back by the controller. Specifically, after the controller in the fan sends the TACH signal to the upper end, the upper end can measure the signal of the TACH signal Frequency, and then convert the signal frequency to get the actual speed of the fan.

In an optional embodiment of the present invention, comprising:

When the working mode of the controller and the upper end is the PWM control mode, within the preset unit time, the upper end sends a PWM signal to the controller; wherein, the PWM signal among the plurality of PWM signals The duty cycle constitutes a PWM signal duty cycle sequence;

The controller monitors whether the PWM signal duty ratio sequence is the first preset PWM signal duty ratio sequence;

If the PWM signal duty cycle sequence is a first preset PWM signal duty cycle sequence, then determine that the PWM signal contains handshake information;

The controller returns response information to the upper end for the handshake information; wherein the response information includes verification information, and the verification information is used to verify whether the response information is correct;

If it is verified that the response information is correct, the upper end sends a mode switching signal to the controller;

The PWM control mode is switched to a command control mode according to the mode switching signal.

For the handshake information, it is the first preset PWM signal duty cycle sequence; wherein, the PWM signal duty cycle sequence is composed of PWM signal duty cycles in multiple PWM signals; for the response information, it is the preset TACH signal Frequency sequence; for the mode switching signal, it is a preset duty ratio sequence of the second PWM signal. It should be noted that the values of the first preset PWM signal duty ratio sequence and the second PWM signal duty ratio sequence are different.

It is worth mentioning that in the case of hot-swappable fan replacement, the upper end can send handshake information to the fan within a predetermined period of time after detecting the fan’s in-position signal, and the fan can be powered on within a predetermined period of time. Monitor the handshake information of the fan.

Referring to FIG. 5 , it shows a schematic diagram of a switching process of a fan control mode provided in an embodiment of the present invention. As shown in the figure, when the working mode of the controller and the upper end is the PWM control mode, within the preset unit time , the upper end sends a PWM signal to the controller, wherein the PWM signal duty cycle in multiple PWM signals forms a PWM signal duty cycle sequence. At this time, the controller of the fan needs to monitor whether the PWM signal duty cycle sequence is the first preset Set the PWM signal duty cycle sequence, assuming that the handshake information is [30%, 10%, 50%], the handshake signal recognition interval is 100ms, when the fan needs to wait for 100ms after receiving 30% of the PWM signal duty cycle, if it is within 100ms If a 10% duty cycle of the PWM signal is detected within a period of time, wait for another 100ms. If a 50% duty cycle of the PWM signal is received, the fan can consider that the PWM signal sent by the upper end contains handshake information, which needs to be explained. What’s more, if any waiting time exceeds 100ms, it can be considered as a normal PWM signal without handshake information. If the PWM signal duty cycle sequence can match the first preset PWM signal duty cycle sequence, it is determined The currently received PWM signal contains the handshake information sent by the upper end, and then the controller can return a response message to the upper end for the handshake information, wherein the response information contains verification information, and the verification information can be used to verify whether the response information is correct , if the upper end verifies that the response information fed back by the controller is correct, the upper end can send a mode switching signal to the controller, so that the fan can switch the PWM control mode to the command control mode according to the mode switching signal.

In the embodiment of the present invention, when the working mode of the controller and the upper end is PWM control mode, within the preset unit time, the upper end sends a PWM signal to the controller, wherein the duty cycle of the PWM signal among the multiple PWM signals A PWM signal duty ratio sequence is formed, and then the controller monitors whether the PWM signal duty ratio sequence is the first preset PWM signal duty ratio sequence, if the PWM signal duty ratio sequence is the first preset PWM signal duty ratio sequence, Then it is determined that the PWM signal contains handshake information, and then, the controller returns response information to the upper end for the handshake information, wherein the response information contains verification information, and the verification information is used to verify whether the response information is correct. If the current response information is verified according to the verification information is When it is correct, the upper end sends a mode switching signal to the controller, and the controller switches the PWM control mode to the command control mode according to the mode switching signal.

It should be noted that, in the embodiment of the present invention, the command control mode can only be entered when both the upper end and the fan support the command control mode. It can be understood that if either party does not support the command control mode, it cannot be controlled by PWM. The mode is switched to the command control mode, that is, the PWM control mode is maintained for fan control to ensure compatibility with existing solutions.

In an optional embodiment of the present invention, comprising:

If the controller does not return response information for the PWM signal, the upper end sends the PWM signal to the controller again;

If the controller does not return response information to the resent PWM signal, the controller does not support the command control mode, and the controller and the upper end maintain the PWM control mode.

In specific implementation, if the upper-end BMC/CPLD supports the command control mode, but the fan does not support the command-control mode, both the controller and the upper end need to maintain the PWM control mode.

In the embodiment of the present invention, when the working mode of the controller and the upper end is PWM control mode, within the preset unit time, the upper end sends a PWM signal to the controller, if the controller does not return response information for the PWM signal, then The upper end sends the PWM signal to the controller again, if the controller still does not respond to the re-sent PWM signal, it can be considered that the controller does not support the command control mode, and since the controller does not support the command control mode, it cannot be The PWM control mode is switched to the command control mode, that is, the controller and the upper end maintain the PWM control mode, and then control the fan speed to ensure compatibility with existing solutions.

In an optional embodiment of the present invention, comprising:

Within a preset unit time, if the controller does not receive the PWM signal containing the handshake information, the upper end does not support the command control mode, and the controller and the upper end maintain the The PWM control mode described above.

In a specific implementation, if the fan supports the command control mode, but the upper end BMC/CPLD does not support the command control mode, both the controller and the upper end need to maintain the PWM control mode.

In the embodiment of the present invention, when the working mode of the controller and the upper end is PWM control mode, within the preset unit time, the upper end sends a PWM signal to the controller, and within the preset response time, if the controller does not receive If the PWM signal contains handshake information, it can be considered that the upper end does not support the command control mode, and since the controller does not support the command control mode, it cannot be switched from the PWM control mode to the command control mode, that is, the controller and the upper end maintain the PWM Control mode, and then control the speed of the fan to ensure compatibility with existing solutions.

In an optional embodiment of the present invention, after switching the PWM control mode to the command control mode according to the mode switching signal, further comprising:

When the working mode of the controller and the upper end is the command control mode, the upper end sends a query command to the controller at a preset unit time interval; wherein the query command is used to check data communication Whether it is smooth;

If the response time corresponding to the response information sent by the controller to the upper end exceeds the preset response time, the upper end sends a query command to the controller again;

If the response time of the controller to the query command exceeds the preset response time again, the upper end switches to the PWM control mode.

Wherein, for the query command, it can be used to check whether the data communication is smooth; for the preset response time, those skilled in the art can adjust it according to actual needs, which is not limited in the embodiment of the present invention.

In a specific implementation, after the PWM control mode is switched to the command control mode, when the working mode of the controller and the upper end is the command control mode, the upper end sends a query command to the controller at a preset unit time interval. If the response time corresponding to the response information sent by the terminal exceeds the preset response time, there may be an abnormality in the communication, and the upper end will send the query command to the controller again. If the response time of the controller to the query command exceeds the preset response time again, the upper switch to PWM control mode.

In an optional embodiment of the present invention, if the response time of the controller to the query command exceeds the preset response time again, after the upper end switches to the PWM control mode, include:

If the controller is still in the command control mode, after exceeding the preset unit time, the controller will automatically switch to the PWM control mode, and use the duty cycle of the PWM signal to control the corresponding Rotor speed regulation.

In a specific implementation, after the PWM control mode is switched to the command control mode, when the working mode of the controller and the upper end is the command control mode, the upper end sends a query command to the controller at a preset unit time interval. If the response time corresponding to the response information sent by the terminal exceeds the preset response time, there may be an abnormality in the communication, and the upper end will send the query command to the controller again. If the response time of the controller to the query command exceeds the preset response time again, the upper If the controller is still in the command control mode at this time, the fan can detect that the high and low levels of the PWM/CLK signal line have changed, but the TACH/DAT signal line has no level change. After a predetermined time , the fan will automatically switch back to PWM mode, and adjust the speed of the rotor corresponding to the controller with the PWM signal duty cycle, that is, control the fan speed.

The embodiment of the present invention also provides a fan operation method, the fan includes a drive circuit, a controller and a motor, the drive circuit drives the rotor of the motor to rotate, the controller is connected to the upper end, wherein the The controller and the upper end are provided with a fan management bus control protocol, and the fan management bus control protocol is provided with a working mode, and the working mode includes a PWM control mode and a command control mode; with reference to Fig. 6, the present invention is shown The step flowchart of a method for operating a fan provided in the embodiment may specifically include the following steps:

Step 601, when the working mode of the controller and the upper end is the PWM control mode, control the rotor speed of the rotor through the PWM signal sent by the upper end to the controller, and, through the The controller outputs the TACH signal to the upper end to feed back the rotor speed of the rotor corresponding to the controller;

For the driving circuit, it can drive the motor to rotate the rotor through the driving signal; wherein, the rotor is a part of the fan, which is connected with the blade of the fan, that is, the rotation of the rotor indicates that the fan starts to rotate; for the rotor speed, it can indicate is the fan speed of the fan; for the rotor position, it can be obtained by a rotor position sensor. It should be noted that, for the method of obtaining the rotor position, those skilled in the art can select an appropriate device to obtain it according to actual needs. This is not limited.

Among them, the controller of the fan is connected to the upper end, and the upper end is connected to the PWM input detection interface of the controller and the CLK interface of the two-wire serial communication through the PWM/CLK signal line, and the upper end is connected to the CLK interface through the TACH/DAT signal line. The TACH signal output interface of the controller and the DAT interface of the two-wire serial communication.

For the upper end, BMC or CPLD is usually used to control the fan; for the controller, it can calculate and generate the corresponding drive signal of the motor according to the measured rotor position and sampling signal, and at the same time, the controller can also measure the PWM signal The duty cycle of the PWM signal; wherein, the sampling signal can be a voltage and/or current signal; for the PWM signal, it is a fan speed control signal sent from the upper end to the fan controller, and the PWM signal includes the duty cycle of the PWM signal The duty cycle of the PWM signal can be used to control the rotor speed of the rotor, that is, the fan speed of the fan; wherein, the duty cycle is the ratio of the power-on time to the total time in a pulse cycle.

For the PWM input detection interface, it can be used to obtain the PWM signal sent from the upper end to the controller, that is, to obtain the set speed of the rotor, and then the controller can control the speed of the rotor in the fan according to the set speed, that is, the fan of the fan Rotating speed.

Among them, the TACH signal can be used to output the actual speed of the rotor, that is, the actual speed of the fan. Specifically, when the controller in the fan sends the TACH signal to the upper end, the upper end can measure the signal frequency of the TACH signal, and then the signal Convert the frequency to get the actual speed of the fan.

It should be noted that, the method for converting the signal frequency of the TACH signal can be adjusted by those skilled in the art according to actual needs, which is not limited in this embodiment of the present invention.

In a specific implementation, when the working mode of the controller and the upper end is PWM control mode, the upper end in the server sends a PWM signal to the controller in the fan, and the fan can receive the upper end through the PWM/ The PWM signal sent by the CLK signal line, so that the controller can control the rotor speed of the rotor according to the PWM signal, that is, control the fan speed of the fan, and output the TACH signal to the TACH/DAT signal line of the upper end through the TACH signal output interface of the controller. By feeding back the rotor speed of the rotor corresponding to the controller to the upper end, that is, the fan speed can be obtained through the TACH signal fed back by the controller.

Step 602, when the working mode of the controller and the upper end is the command control mode, send the CLK signal and the DAT signal to the controller through the upper end, so that the controller executes the CLK signal and the DAT signal form the control command.

In a specific implementation, when the working mode of the controller and the upper end is the command control mode, the signal in the PWM/CLK signal line connected to the upper end is switched from the PWM signal to the CLK signal, and the signal in the TACH/DAT signal line connected to the upper end is changed by The TACH signal is switched to the DAT signal, so that the controller can receive the CLK signal sent by the upper end through the PWM/CLK signal line through the CLK interface of the two-wire serial communication of the controller, and the controller can receive the CLK signal sent by the upper end through the two-wire serial communication of the controller. The DAT interface of the DAT interface receives the DAT signal sent by the upper end through the TACH/DAT signal line, wherein the CLK signal and the DAT signal can be used for data communication, so that the controller executes the control command formed by the CLK signal and the DAT signal.

In the embodiment of the present invention, when the working mode of the controller and the upper end is PWM control mode, the PWM signal sent by the upper end through the PWM/CLK signal line is received through the PWM input detection interface of the controller, so that the controller Control the rotor speed of the rotor, and output the TACH signal to the TACH/DAT signal line of the upper end through the TACH signal output interface of the controller, so as to feed back the rotor speed of the rotor corresponding to the controller to the upper end; when the working mode of the controller and the upper end is In the command control mode, the controller receives the CLK signal sent by the upper end through the PWM/CLK signal line through the CLK interface of the two-wire serial communication of the controller, and the controller receives the CLK signal through the DAT interface of the two-wire serial communication of the controller. The DAT signal sent by the upper end through the TACH/DAT signal line enables the controller to execute the control command formed by the CLK signal and the DAT signal. The fan provided by the above-mentioned embodiments of the present invention does not need to change the hardware circuit and interface of the existing upper end, and develops the fan management bus control protocol by multiplexing the existing signal lines, increasing the communication control function between the upper end and the controller of the fan, Compatibility with the existing system is guaranteed. In addition, the detailed operation data of the fan can be obtained through the controller to execute the control command formed by the CLK signal and the DAT signal, and the operation status of the fan can be better monitored.

It should be noted that, as for the method embodiment, since it is basically similar to the above-mentioned embodiment, the description is relatively simple, and for related parts, please refer to part of the description of the above-mentioned embodiment. For the sake of simple description, it is expressed as a series of action combinations, but those skilled in the art should know that the embodiment of the present invention is not limited by the described action order, because according to the embodiment of the present invention, some steps can be in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

In addition, an embodiment of the present invention also provides an electronic device, including: a processor, a memory, and a computer program stored in the memory and operable on the processor. When the computer program is executed by the processor, the above fan operation method is implemented. The various processes of the embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

Fig. 7 is a schematic structural diagram of a computer-readable storage medium provided in an embodiment of the present invention.

The embodiment of the present invention also provides a computer-readable storage medium 701. A computer program is stored on the computer-readable storage medium 701. When the computer program is executed by the processor, each process of the above-mentioned fan operation method embodiment is realized, and can achieve The same technical effects are not repeated here to avoid repetition. Wherein, the computer-readable storage medium 701 is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

FIG. 8 is a schematic diagram of a hardware structure of an electronic device implementing various embodiments of the present invention.

The electronic device 800 includes, but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, a processor 810, and Power supply 811 and other components. Those skilled in the art can understand that the structure of the electronic device shown in Figure 8 does not constitute a limitation on the electronic device, and the electronic device may include more or less components than shown in the illustration, or combine some components, or different components layout. In the embodiment of the present invention, electronic devices include but are not limited to mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, wearable devices, and pedometers.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 801 can be used for receiving and sending signals during sending and receiving information or during a call. Specifically, after receiving the downlink data from the base station, the processor 810 processes it; Uplink data is sent to the base station. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 801 can also communicate with the network and other devices through a wireless communication system.

The electronic device provides users with wireless broadband Internet access through the network module 802, such as helping users send and receive emails, browse web pages, and access streaming media.

The audio output unit 803 may convert audio data received by the radio frequency unit 801 or the network module 802 or stored in the memory 809 into an audio signal and output as sound. Also, the audio output unit 803 can also provide audio output related to a specific function performed by the electronic device 800 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 803 includes a speaker, a buzzer, a receiver, and the like.

The input unit 804 is used for receiving audio or video signals. The input unit 804 may include a graphics processor (Graphics Processing Unit, GPU) 8041 and a microphone 8042, and the graphics processor 8041 is used for still pictures or video images obtained by an image capture device (such as a camera) in video capture mode or image capture mode The data is processed. The processed image frames may be displayed on the display unit 806 . The image frames processed by the graphics processor 8041 may be stored in the memory 809 (or other storage medium) or sent via the radio frequency unit 801 or the network module 802 . The microphone 8042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into a format that can be sent to a mobile communication base station via the radio frequency unit 801 for output in the case of a phone call mode.

The electronic device 800 also includes at least one sensor 805, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 8061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 8061 and the display panel 8061 when the electronic device 800 moves to the ear / or backlighting. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used to identify the posture of electronic equipment (such as horizontal and vertical screen switching, related games) , magnetometer posture calibration), vibration recognition-related functions (such as pedometer, tap), etc.; the sensor 805 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, Infrared sensors, etc., will not be repeated here.

The display unit 806 is used to display information input by the user or information provided to the user. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like.

The user input unit 807 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the electronic device. Specifically, the user input unit 807 includes a touch panel 8071 and other input devices 8072 . The touch panel 8071, also referred to as a touch screen, can collect touch operations of the user on or near it (for example, the user uses any suitable object or accessory such as a finger or a stylus on the touch panel 8071 or near the touch panel 8071 operate). The touch panel 8071 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the For the processor 810, receive the command sent by the processor 810 and execute it. In addition, the touch panel 8071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 8071 , the user input unit 807 may also include other input devices 8072 . Specifically, other input devices 8072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

Furthermore, the touch panel 8071 can be covered on the display panel 8061, and when the touch panel 8071 detects a touch operation on or near it, it will be sent to the processor 810 to determine the type of the touch event, and then the processor 810 will The type of event provides a corresponding visual output on the display panel 8061. Although in FIG. 8, the touch panel 8071 and the display panel 8061 are used as two independent components to realize the input and output functions of the electronic device, in some embodiments, the touch panel 8071 and the display panel 8061 can be integrated. The implementation of the input and output functions of the electronic device is not specifically limited here.

The interface unit 808 is an interface for connecting an external device to the electronic device 800 . For example, an external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) ports, video I/O ports, headphone ports, and more. The interface unit 808 can be used to receive input from an external device (for example, data information, power, etc.) transfer data between devices.

The memory 809 can be used to store software programs as well as various data. The memory 809 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); Data created by the use of mobile phones (such as audio data, phonebook, etc.), etc. In addition, the memory 809 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 810 is the control center of the electronic device, and uses various interfaces and lines to connect various parts of the entire electronic device, by running or executing software programs and/or modules stored in the memory 809, and calling data stored in the memory 809 , to perform various functions of the electronic equipment and process data, so as to monitor the electronic equipment as a whole. The processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 810 .

The electronic device 800 can also include a power supply 811 (such as a battery) for supplying power to various components. Preferably, the power supply 811 can be logically connected to the processor 810 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. and other functions.

In addition, the electronic device 800 includes some functional modules not shown, which will not be repeated here.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD-ROM), including several instructions to make a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the methods described in various embodiments of the present invention.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, without departing from the gist of the present invention and the protection scope of the claims, many forms can also be made, all of which belong to the protection of the present invention.

Those of ordinary skill in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed in the embodiments of the present invention can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (20)

1. A fan comprises a driving circuit, a controller and a motor, wherein the driving circuit drives a rotor of the motor to rotate, and the controller is connected with an upper end;

when the working mode of the controller and the upper end is the PWM control mode, the PWM signal sent to the controller by the upper end controls the rotor rotating speed of the rotor, and the TACH signal output to the upper end by the controller feeds back the rotor rotating speed of the rotor corresponding to the controller;

and when the working mode of the controller and the upper terminal is the command control mode, transmitting a CLK signal and a DAT signal to the controller through the upper terminal to enable the controller to execute a control command formed by the CLK signal and the DAT signal.

2. The fan as claimed in claim 1, comprising:

the upper end is connected to a PWM input detection interface of the controller and a CLK interface of the two-wire serial communication through a PWM/CLK signal line, and is connected to a TACH signal output interface of the controller and a DAT interface of the two-wire serial communication through a TACH/DAT signal line.

3. The fan as claimed in claim 2, further comprising:

when the working mode of the controller and the upper end is the PWM control mode, receiving a PWM signal sent by the upper end through the PWM/CLK signal line through a PWM input detection interface of the controller so that the controller controls the rotor rotation speed of the rotor according to the PWM signal, and outputting a TACH signal to a TACH/DAT signal line of the upper end through a TACH signal output interface of the controller so as to feed back the rotor rotation speed of the rotor corresponding to the controller to the upper end;

when the working mode of the controller and the upper bit terminal is the command control mode, the controller receives a CLK signal transmitted by the upper bit terminal through the PWM/CLK signal line through a CLK interface of the two-wire serial communication of the controller, and the controller receives a DAT signal transmitted by the upper bit terminal through the TACH/DAT signal line through a DAT interface of the two-wire serial communication of the controller, so that the controller executes a control command formed by the CLK signal and the DAT signal.

4. The fan as claimed in claim 1, wherein the controller is configured to generate a driving signal of the motor according to a rotor position of the rotor and a sampling signal, so as to control the driving circuit to drive the motor to rotate the rotor according to the driving signal; wherein the sampling signal is at least a voltage and/or current signal.

5. The fan of claim 1 wherein the PWM signal comprises a PWM signal duty cycle, the PWM signal duty cycle being used to control a rotor speed of the rotor.

6. The fan as claimed in claim 5, wherein the PWM signal transmitted to the controller through the upper terminal to control the rotor speed of the rotor comprises:

when the working mode of the controller and the upper end is the PWM control mode, the upper end sends a PWM signal to the controller;

and controlling the rotor rotating speed of the rotor corresponding to the controller according to the PWM signal duty ratio in the PWM signal.

7. The fan as claimed in claim 1, wherein the TACH signal outputted to the upper end by the controller for feeding back the rotor speed of the rotor corresponding to the controller comprises:

when the working modes of the controller and the upper end are the PWM control mode, the controller sends a TACH signal to the upper end;

and measuring the TACH signal frequency of the TACH signal to obtain the rotor rotating speed of the rotor.

8. The fan as claimed in claim 1, comprising:

when the working mode of the controller and the upper end is the PWM control mode, the upper end sends a PWM signal to the controller within a preset unit time; the PWM signal duty ratios in the plurality of PWM signals form a PWM signal duty ratio sequence;

the controller monitors whether the PWM signal duty cycle sequence is a first preset PWM signal duty cycle sequence;

if the PWM signal duty cycle sequence is a first preset PWM signal duty cycle sequence, determining that the PWM signal contains handshake information;

the controller returns response information to the upper end aiming at the handshake information; the response information comprises verification information, and the verification information is used for verifying whether the response information is correct or not;

if the response information is verified to be correct, the upper end sends a mode switching signal to the controller;

and switching the PWM control mode to a command control mode according to the mode switching signal.

9. The fan as claimed in claim 8, wherein the response message is a preset TACH signal frequency sequence, and the mode switching signal is a preset second PWM signal duty cycle sequence.

10. The fan as claimed in claim 8, comprising:

if the controller does not return response information aiming at the PWM signal, the upper end sends the PWM signal to the controller again;

and if the controller does not return response information to the PWM signal sent again, the controller does not support the command control mode, and the controller and the upper end maintain the PWM control mode.

11. The fan as claimed in claim 8, comprising:

and in a preset unit time, if the controller does not receive the PWM signal containing the handshake information, the upper end does not support the command control mode, and the controller and the upper end maintain the PWM control mode.

12. The fan as claimed in claim 8, further comprising, after the switching the PWM control mode to the command control mode according to the mode switching signal:

when the working mode of the controller and the upper end is the command control mode, the upper end sends a query command to the controller at preset unit time intervals; wherein the query command is used to check whether data communication is clear;

if the response time corresponding to the response information sent to the upper end by the controller exceeds the preset response time, the upper end sends a query command to the controller again;

and if the response time of the controller for the query command exceeds the preset response time again, the upper end is switched to the PWM control mode.

13. The fan as claimed in claim 12, further comprising, after the upper terminal switches to the PWM control mode if the response time of the controller to the query command exceeds a preset response time again, the method further comprising:

if the controller is still in the command control mode, after the preset unit time is exceeded, the controller automatically switches to the PWM control mode, and adjusts the speed of the rotor corresponding to the controller according to the duty ratio of the PWM signal.

14. The fan as claimed in claim 1, wherein the control command is used for obtaining basic information of the fan, the basic information of the fan at least comprising: fan model, manufacturer code, fan ID, hard software version, maximum speed, minimum speed, rated voltage, rated power, rated air volume, and rated static pressure.

15. The fan of claim 1, wherein the control commands are further configured to obtain real-time operating data of the fan, the real-time operating data of the fan comprising at least: target rotating speed, actual rotating speed, steering, speed regulation completion mark, voltage, current, power, wind pressure and running duration.

16. The fan as claimed in claim 1, wherein the control command is further used for obtaining fault information of the fan, the fault information of the fan at least comprising: hall faults, MOS faults, over-voltage, under-voltage, over-current, and locked rotor.

17. The fan of claim 1, wherein the control commands are further configured to modify fan parameters, the fan parameters comprising at least: self-defined maximum rotating speed, minimum rotating speed, maximum current, duty ratio rotating speed coefficient and default rotating speed without control signals.

18. An operation method of a fan, wherein the fan comprises a driving circuit, a controller and a motor, the driving circuit drives a rotor of the motor to rotate, and the controller is connected with an upper end, and is characterized in that the controller and the upper end are provided with a fan management bus control protocol, the fan management bus control protocol is provided with working modes, the working modes comprise a PWM control mode and a command control mode, and the method comprises the following steps:

when the working mode of the controller and the upper end is the PWM control mode, the PWM signal sent to the controller by the upper end is used for controlling the rotor speed of the rotor, and the controller outputs a TACH signal to the upper end to feed back the rotor speed of the rotor corresponding to the controller;

and when the working mode of the controller and the upper terminal is the command control mode, transmitting a CLK signal and a DAT signal to the controller through the upper terminal to enable the controller to execute a control command formed by the CLK signal and the DAT signal.

19. An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

the memory is used for storing a computer program;

the processor, when executing a program stored on the memory, implementing the method of claim 18.

20. A computer-readable storage medium having stored thereon instructions, which when executed by one or more processors, cause the processors to perform the method of claim 18.

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