CN117703811A - Method for controlling fan rotation speed by airspeed detection and VPX chassis - Google Patents
Method for controlling fan rotation speed by airspeed detection and VPX chassis Download PDFInfo
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Abstract
The invention discloses a method for controlling the rotation speed of a fan by utilizing airspeed detection and a VPX chassis, wherein an airspeed sensing unit is used for acquiring the wind speed in an air duct and acquiring a set fan rotation speed corresponding to the moment of acquiring the wind speed so as to determine the corresponding relation between the wind speed in the air duct and the fan rotation speed; collecting the wind speed in the air duct of the VPX chassis through an airspeed sensing unit, and collecting the temperature in the air duct of the VPX chassis through a temperature sensor; determining a corresponding target wind speed according to the current temperature; determining a target rotating speed of the fan according to the target wind speed and the corresponding relation between the wind speed and the rotating speed of the fan, and regulating the rotating speed of the fan to the target rotating speed through a fan speed regulating circuit; and detecting the wind speed deviation between the measured wind speed and the target wind speed in the air duct of the VPX chassis, and regulating the rotating speed of the fan through a fan speed regulating circuit according to the wind speed deviation. The invention is beneficial to improving the control precision of the fan and reducing the power loss.
Description
Technical Field
The invention relates to the technical field of VPX chassis heat dissipation and cooling methods, in particular to a method for controlling the rotating speed of a fan by utilizing airspeed detection and a VPX chassis.
Background
At present, VPX (VPX is a new generation high-speed serial bus standard proposed by the VITA (VME International Trade Association, VME international trade association) organization in 2007 on the basis of VME bus, and is a new generation bus standard based on high-speed serial bus), and most VPX cases adopt a feedback-free mode to directly control the rotation speed of a cooling fan for cooling.
In the heat dissipation mode, whether the temperature of the VPX chassis is over-temperature or not is detected by the temperature sensor, and the rotating speed of the fan is adjusted to the target rotating speed only when the temperature is over-temperature.
However, the fan heat dissipation control method has the following disadvantages: the control precision is low, the power loss is large, and the noise of directly adjusting the fan to the target rotating speed is large.
Disclosure of Invention
The invention mainly aims to provide a method for controlling the rotating speed of a fan by utilizing airspeed detection and a VPX chassis, and aims to solve the problems that in the existing VPX chassis, the control precision of a fan radiating control mode is low, the power loss is high, and the noise of directly adjusting the fan to a target rotating speed is high.
In order to achieve the above purpose, the invention provides a method for controlling the rotation speed of a fan by using airspeed detection, which is used for controlling the rotation speed of the fan of a VPX chassis through a control module, wherein the control module comprises an airspeed sensing unit, a fan control unit, a fan speed regulating circuit and a fan which are connected in sequence by signals; the method comprises the following steps:
acquiring the wind speed in the air duct through an airspeed sensing unit, and acquiring a set fan rotating speed corresponding to the moment of acquiring the wind speed so as to determine the corresponding relation between the wind speed in the air duct and the fan rotating speed;
when the rotating speed of the fan needs to be regulated and controlled, collecting the wind speed in the air duct of the VPX chassis through the airspeed sensing unit, and collecting the temperature in the air duct of the VPX chassis through the temperature sensor;
the fan control unit judges whether the fan operates normally or not according to the collected wind speed and the set fan rotating speed corresponding to the collected wind speed moment;
if the wind speed is normal, determining a corresponding target wind speed according to the current temperature;
determining a target rotating speed of the fan according to the target wind speed and the corresponding relation between the wind speed and the rotating speed of the fan, and regulating the rotating speed of the fan to the target rotating speed through a fan speed regulating circuit;
and detecting the wind speed deviation between the measured wind speed and the target wind speed in the air duct of the VPX chassis, and regulating the rotating speed of the fan through a fan speed regulating circuit according to the wind speed deviation.
Preferably, the step of acquiring the wind speed in the air duct by the airspeed sensing unit and acquiring a set fan rotation speed corresponding to the time of acquiring the wind speed to determine the corresponding relationship between the wind speed in the air duct and the fan rotation speed includes:
different fan rotating speeds between the set minimum rotating speed of the fan and the set maximum rotating speed of the fan are collected, and corresponding actual wind speeds in the air duct of the VPX chassis are respectively obtained to form a plurality of groups of sampling data;
establishing a rectangular coordinate system of wind speed and fan rotating speed by taking the corresponding actual wind speed in the air duct of the VPX chassis as an abscissa and the fan rotating speed as an ordinate;
in a rectangular coordinate system, each group of sampling data is drawn to form sampling points;
forming a sampling curve of wind speed and fan rotating speed according to all the sampling points;
and determining a functional relation between the wind speed and the fan rotating speed according to a sampling curve of the wind speed and the fan rotating speed.
Preferably, the step of determining the target rotation speed of the fan according to the target wind speed and the corresponding relation between the wind speed and the rotation speed of the fan, and adjusting the rotation speed of the fan to the target rotation speed through the fan speed adjusting circuit comprises the following steps:
inputting the target wind speed into the functional relation to output the target rotating speed of the fan corresponding to the target wind speed;
the fan speed is adjusted to the target speed by a fan speed adjusting circuit.
Preferably, the method further comprises:
acquiring the position and the heating temperature change of each heating module in the VPX chassis;
dividing the heating modules into a plurality of heating groups according to the position and the heating temperature change of the heating modules; wherein, each heating group adopts different air channels.
Preferably, the step of determining the corresponding target wind speed according to the current temperature includes:
collecting the temperature in each air duct, and collecting the temperature of a heating module corresponding to each air duct;
and determining a target wind speed corresponding to each air channel according to the temperature in each air channel and the temperature of the heating module corresponding to each air channel, wherein the target wind speed is greater than or equal to 0.
Preferably, the step of determining the target wind speed corresponding to each air duct according to the temperature in each air duct and the temperature of the heating module corresponding to each air duct includes:
determining a first wind speed corresponding to the temperature in the air duct according to the temperature in the air duct;
determining a second wind speed required by each heating module corresponding to the same air duct according to the temperature of the heating module corresponding to the same air duct;
and calculating a target wind speed corresponding to the air duct according to the first wind speed and the second wind speed.
Preferably, the step of determining whether the fan operates normally by the fan control unit according to the collected wind speed and the set fan rotation speed corresponding to the collected wind speed time includes:
inputting the collected wind speeds into the functional relation to obtain theoretical fan rotating speeds corresponding to each collected wind speed;
comparing the theoretical fan speed with the set fan speed to determine whether the deviation is within the set deviation;
if yes, judging that the fan runs normally;
if not, judging that the fan is abnormal in operation.
Preferably, the wind speed as a function of fan speed is:
；
wherein x is wind speed, y is fan rotation speed, A is set minimum fan rotation speed, B is set maximum fan rotation speed, C is wind speed corresponding to set minimum fan rotation speed, and D is wind speed corresponding to set maximum fan rotation speed.
Preferably, the wind speed as a function of fan speed is:
；
wherein x is wind speed, y is fan rotation speed,，/>，/>for the sampling curve function, A is the set minimum rotation speed of the fan, B is the set maximum rotation speed of the fan, C is the wind speed corresponding to the set minimum rotation speed of the fan, and D is the wind speed corresponding to the set maximum rotation speed of the fan;
taking the step length n as the progress unit of the full curve calibration,wherein N is +.>The total step length is set between, at the fan speed +.>The total step length set in between is also N;
；
ordinate value of the end point of the curve segment corresponding to a step length n ++>For the ordinate value of the starting point of the curve segment corresponding to a step size n, +.>For the abscissa value of the end point of the curve segment corresponding to a step size n, +.>Is the abscissa value of the start point of the curve segment corresponding to the step length n.
In order to achieve the above purpose, the present invention further provides a VPX chassis, wherein the fan rotation speed is adjusted by the method for controlling the fan rotation speed using airspeed detection; the VPX chassis comprises a control module, wherein the control module comprises an airspeed sensing unit, a fan control unit, a fan speed regulating circuit and a fan which are connected in sequence in a signal mode.
According to the technical scheme, the corresponding relation between the wind speed and the fan rotating speed in the actual air duct is determined through multiple sampling, and due to the influences of the design shape, the path and the size of the VPX chassis, the corresponding relation between the wind speed and the fan rotating speed in each air duct of the VPX chassis is different and has a certain deviation, so that the accurate control condition of the fan speed regulation is facilitated to be obtained according to the corresponding relation between the wind speed and the fan rotating speed actually measured in the air duct. Furthermore, on the premise that the corresponding relation between the collected wind speed and the fan rotating speed is used as a precise control condition, the invention also collects the wind speed in the air duct and the temperature in the air duct, and the fan can be determined whether to normally operate by comparing the collected wind speed with the set fan rotating speed corresponding to the collected wind speed moment, and if not, the fan or the air duct can be prompted to be detected so as to remove the fan clamping failure or the air duct clamping failure. When the fan runs normally, the target wind speed is determined according to the current temperature, so that the technical scheme of directly adjusting the rotating speed of the fan to the set rotating speed when the temperature exceeds the set value is not adopted, and different target wind speeds exist according to different temperature values, and the effect of accurately controlling the wind speed according to different temperatures is achieved. Further, according to the determined target wind speed and the corresponding relation between the precisely controlled wind speed and the fan rotating speed, the invention determines the target rotating speed of the fan, so as to adjust the fan rotating speed to the target rotating speed, and according to the wind speed deviation between the measured wind speed and the target wind speed after speed regulation, the fan rotating speed is adjusted again through the fan speed regulating circuit. Therefore, the fan rotating speed is adjusted according to the actual wind speed feedback condition in the air duct, has accurate control conditions, has high control precision, adjusts the corresponding fan rotating speed according to different temperatures, but directly adjusts the fan rotating speed to the maximum when the temperature exceeds the temperature, has low power loss, can not directly adjust the fan rotating speed to the maximum rotating speed when the fan rotates, and can not cause overlarge noise caused by the fact that the fan is frequently adjusted to the maximum rotating speed.
Drawings
FIG. 1 is a flow chart of a method for controlling fan speed using airspeed detection according to the present invention in a first embodiment;
FIG. 2 is a schematic diagram of a control module in a VPX chassis according to the present invention;
FIG. 3 is a schematic diagram of a sampling curve according to the present invention;
fig. 4 is another schematic diagram of a sampling curve according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the following description, suffixes such as "unit", "part" or "unit" for representing elements are used only for facilitating the description of the present invention, and have no specific meaning per se. Thus, "unit," "component," or "unit" may be used in combination.
Referring to fig. 1 to 2, in a first embodiment of the present invention, a method for controlling a fan speed by using airspeed detection is provided, and the method is used for controlling a fan speed of a VPX chassis through a control module, where the control module includes an airspeed sensing unit, a fan control unit, a fan speed regulation circuit, and a fan that are sequentially connected by signals; the method comprises the following steps:
step S10, acquiring the wind speed in the air duct through an airspeed sensing unit, and acquiring a set fan rotating speed corresponding to the moment of acquiring the wind speed so as to determine the corresponding relation between the wind speed in the air duct and the fan rotating speed;
specifically, step S10 may be performed during a period when the VPX chassis does not need to start the fan, for example, when the VPX chassis is just put into use. In the invention, the corresponding relation between the wind speed and the fan rotating speed can be resampled at intervals of set time, and if the corresponding relation between the sampled wind speed and the fan rotating speed is found to be inconsistent with the corresponding relation recorded in the system for a plurality of times, the corresponding relation between the wind speed and the fan rotating speed recorded in the system is updated so as to avoid the situation that the wind speed and the fan rotating speed cannot be corresponding.
Step S20, when the rotating speed of the fan needs to be regulated and controlled, collecting the wind speed in the air duct of the VPX chassis through the airspeed sensing unit, and collecting the temperature in the air duct of the VPX chassis through the temperature sensor;
step S30, the fan control unit judges whether the fan operates normally according to the collected wind speed and the set fan rotating speed corresponding to the time of collecting the wind speed;
if so, step S40 is performed: determining a corresponding target wind speed according to the current temperature;
step S50, determining the target rotating speed of the fan according to the target wind speed and the corresponding relation between the wind speed and the rotating speed of the fan, and adjusting the rotating speed of the fan to the target rotating speed through a fan speed adjusting circuit;
and S60, detecting the wind speed deviation between the measured wind speed and the target wind speed in the air duct of the VPX chassis, and adjusting the rotating speed of the fan through a fan speed adjusting circuit according to the wind speed deviation.
Specifically, step S10 is a control basis of steps S20 to S60, and step S10 occurs before the fan adjusting step, and is used for knowing the actual fan set rotational speed corresponding to the measured wind speed according to the actual wind channel environment after the fan is installed in the wind channel. Therefore, when the rotating speed of the fan needs to be regulated, the required wind speed which can reach the set cooling speed is determined according to the temperature in the air duct, and then the rotating speed of the fan is regulated according to the corresponding relation between the wind speed and the rotating speed of the fan. In the present invention, the wind speed used to achieve the set cooling rate is different depending on the temperature. For example, the higher the temperature, the more rapid heat transfer is required, the greater the corresponding wind speed; conversely, although the temperature is slightly over-temperature, the over-temperature amplitude is small, the heat can be transferred at a lower speed, and the corresponding wind speed is relatively small; further, the temperature is not over-temperature, but is already in the set temperature range before over-temperature, so that smaller wind speed can be provided. Therefore, in the invention, the fan is not started only when the temperature exceeds the temperature, but a certain wind speed is required to be provided in a temperature interval before the temperature exceeds the temperature.
According to the technical scheme, the corresponding relation between the wind speed and the fan rotating speed in the actual air duct is determined through multiple sampling, and due to the influences of the design shape, the path and the size of the VPX chassis, the corresponding relation between the wind speed and the fan rotating speed in each air duct of the VPX chassis is different and has a certain deviation, so that the accurate control condition of the fan speed regulation is facilitated to be obtained according to the corresponding relation between the wind speed and the fan rotating speed actually measured in the air duct. Furthermore, on the premise that the corresponding relation between the collected wind speed and the fan rotating speed is used as a precise control condition, the invention also collects the wind speed in the air duct and the temperature in the air duct, and the fan can be determined whether to normally operate by comparing the collected wind speed with the set fan rotating speed corresponding to the collected wind speed moment, and if not, the fan or the air duct can be prompted to be detected so as to remove the fan clamping failure or the air duct clamping failure. When the fan runs normally, the target wind speed is determined according to the current temperature, so that the technical scheme of directly adjusting the rotating speed of the fan to the set rotating speed when the temperature exceeds the set value is not adopted, and different target wind speeds exist according to different temperature values, and the effect of accurately controlling the wind speed according to different temperatures is achieved. Further, according to the determined target wind speed and the corresponding relation between the precisely controlled wind speed and the fan rotating speed, the invention determines the target rotating speed of the fan, so as to adjust the fan rotating speed to the target rotating speed, and according to the wind speed deviation between the measured wind speed and the target wind speed after speed regulation, the fan rotating speed is adjusted again through the fan speed regulating circuit. Therefore, the fan rotating speed is adjusted according to the actual wind speed feedback condition in the air duct, has accurate control conditions, has high control precision, adjusts the corresponding fan rotating speed according to different temperatures, but directly adjusts the fan rotating speed to the maximum when the temperature exceeds the temperature, has low power loss, can not directly adjust the fan rotating speed to the maximum rotating speed when the fan rotates, and can not cause overlarge noise caused by the fact that the fan is frequently adjusted to the maximum rotating speed.
Specifically, under the condition that the normal operation of the fan and the blockage of the air duct are confirmed, the fan is controlled to be adjusted to the set rotating speed according to the set sampling time, and the actual wind speed in the air duct of the VPX chassis is acquired through the airspeed sensing unit at each sampling time, so that the corresponding relation between the actual wind speed and the set rotating speed is formed.
The airspeed sensing unit comprises an air speed sensor, an amplifying circuit, a digital-to-analog conversion circuit and a digital communication interface which are sequentially connected in a signal manner; the fan control unit comprises a microprocessor and a communication interface which are in communication connection; the fan speed regulating unit comprises a PWM speed regulating circuit, and the communication interface is respectively in communication connection with the digital communication interface and the PWM speed regulating circuit.
The wind speed sensor collects wind speed of an air duct in the VPX chassis, outputs digital quantity to the fan control unit after internal amplification and analog-to-digital conversion, judges whether the running state of the fan is normal according to a feedback wind speed result, and sends a speed regulation command to the fan speed regulation unit in real time according to the heat dissipation requirement of the chassis to regulate the rotating speed of the fan.
Specifically, the fan may be a dc fan.
For the air duct, the shape, the path and the size of the air duct can influence the heat dissipation effect. According to step S40, the actual correspondence between the temperature in the air duct of each VPX chassis and the target wind speed also needs to be formulated in advance.
The corresponding relation between the temperature of the air duct and the target wind speed can be formulated by referring to the following method:
the fans are arranged at the same position of different air channels and rotate at the same rotating speed, and the corresponding relation between the actual wind speed and the heat dissipation effect in the air channels is different due to the different sizes and shapes of the air channels. Therefore, in the invention, the actual influence of different air ducts on temperature reduction is considered, the actual wind speed required by the air duct temperature to be reduced to the target temperature in the preset time is actually measured under different air duct temperatures, and then the actual wind speed required by each temperature to be reduced to the target temperature in the preset time is stored as the target wind speed.
Therefore, according to different temperature values in the air duct, the stored target wind speed is stored.
Further, in the present invention, when fans are respectively disposed in different positions of the air duct, the target wind speed refers to a cumulative wind speed formed by the combined action of all fans in the air duct.
The set fan speed corresponding to the accumulated wind speed in the invention is determined according to the following mode:
and setting an airspeed sensing unit at a calibration position in the air duct, and controlling all fan rotating speeds in the same air duct to rotate from small to large, wherein all fan rotating speeds in the same air duct are the same until a target wind speed is detected at the calibration position, and at the moment, the same rotating speeds of all fans in the air duct corresponding to the target wind speed are set fan rotating speeds corresponding to the accumulated wind speed.
Further, step S60 is configured to further adjust the wind speed in the wind tunnel to the target wind speed when the measured wind speed does not reach the target wind speed. For example, when the measured wind speed is less than the target wind speed, the rotational speed of the fan is controlled to increase, and when the measured wind speed is greater than the target wind speed, the rotational speed of the fan is controlled to decrease. And the wind speed deviation is recorded so as to correct the corresponding relation between the wind speed in the air duct and the rotating speed of the fan.
Referring to fig. 3 to 4, in a second embodiment of the method for controlling the rotational speed of a fan using airspeed detection according to the first embodiment of the present invention, the step S10 includes:
step S11, collecting different fan speeds from the set minimum fan speed to the set maximum fan speed, and respectively corresponding actual wind speeds in the air duct of the VPX chassis to form a plurality of groups of sampling data;
step S12, establishing a rectangular coordinate system of wind speed and fan rotating speed by taking the corresponding actual wind speed in the air duct of the VPX chassis as an abscissa and the fan rotating speed as an ordinate;
step S13, drawing each group of sampling data to form sampling points in a rectangular coordinate system;
step S14, forming a sampling curve of wind speed and fan rotating speed according to all the sampling points;
and S15, determining a functional relation between the wind speed and the fan rotating speed according to a sampling curve of the wind speed and the fan rotating speed.
The sampling curve can adopt two processing modes:
the first way is: forming oblique lines of the wind speed and the fan rotating speed according to the fitting of sampling curves of all sampling points;
the second way is: and smoothly forming a curve of wind speed and fan rotating speed according to the sampling curves of all the sampling points.
In both cases with different functional relationships.
In the first mode: when the correlation between the wind speed and the fan rotation speed is represented by oblique lines formed by fitting, the functional relation between the wind speed and the fan rotation speed is as follows:
；
wherein x is wind speed, y is fan rotation speed, A is set minimum fan rotation speed, B is set maximum fan rotation speed, C is wind speed corresponding to set minimum fan rotation speed, and D is wind speed corresponding to set maximum fan rotation speed.
In the first case, the corresponding relation between the wind speed and the set rotating speed is expressed by adopting general precision, and the sampling curve is fitted to form oblique lines so as to perform approximate conversion between the wind speed and the set wind speed; wherein the slope of the oblique line；
The second mode is: when the correlation between the wind speed and the fan rotation speed is represented by a smoothly formed curve, the functional relation between the wind speed and the fan rotation speed is as follows:
；
wherein x is wind speed, y is fan rotation speed,，/>，/>the sampling curve function is that A is the set minimum rotation speed of the fan, B is the set maximum rotation speed of the fan, C is the wind speed corresponding to the set minimum rotation speed of the fan, and D is the wind speed corresponding to the set maximum rotation speed of the fan.
In the second mode, full curve calibration can be adopted, the step length n is taken as the progress unit of the full curve calibration,wherein N is +.>The total step length is set between, at the fan speed +.>The total step length set in the step length is also N, and the wind speed gradient of each step length span is obtained according to the step length number>Obtaining the fan rotating speed gradient of each step span according to the number of the step spans to be +.>The method comprises the steps of carrying out a first treatment on the surface of the Therefore, according to the wind speed x required by the heat dissipation of the chassis, the step-length progress n corresponding to the wind speed x can be determined:
；
thus, the corresponding curve segment in the sampled curve can be determined according to the step progress n, and the curve can be determined according to the starting point value and the end point value of the corresponding curve segmentSlope of line segment；
；
Wherein,for sampling the slope of the curve segment corresponding to a step length n in the curve, +.>Ordinate value of the end point of the curve segment corresponding to a step length n ++>For the ordinate value of the starting point of the curve segment corresponding to a step size n, +.>For the abscissa value of the end point of the curve segment corresponding to a step size n, +.>Is the abscissa value of the start point of the curve segment corresponding to the step length n.
Therefore, the fan rotation speed corresponding to the wind speed x is:
；
therefore, the fan speed obtained according to the second mode will be more accurate.
When a smooth curve is adopted, the corresponding fan rotating speed is calculated in a sampling curve function of the second mode according to the required wind speed.
The set minimum fan rotation speed a and the set maximum fan rotation speed B are determined according to the set parameters of the fan, and in this embodiment, the set minimum fan rotation speed a may be 0. Further, the minimum rotation speed of the fan and the maximum rotation speed of the fan which are arranged in different air channels are the same or different.
In a third embodiment of the method for controlling a rotational speed of a fan using airspeed detection according to the present invention, the step S50 includes:
step S51, inputting a target wind speed into the functional relation to output a target rotating speed of the fan corresponding to the target wind speed;
step S52, the fan rotating speed is regulated to the target rotating speed through a fan speed regulating circuit.
In a fourth embodiment of the method for controlling a rotational speed of a fan using airspeed detection according to the present invention, based on the first to third embodiments of the method for controlling a rotational speed of a fan using airspeed detection according to the present invention, the method further includes:
step S70, the position and the heating temperature change of each heating module in the VPX chassis are obtained;
s80, dividing the heating modules into a plurality of heating groups according to the position of the heating modules and the heating temperature change; wherein, each heating group adopts different air channels.
In this embodiment, multiple plenums are designed in the VPX chassis. The heating module refers to a module that generates heat in the VPX chassis, for example, a hard disk module, a CPU module, a memory module, a display card module, and a power module.
According to the position and heating temperature change of the heating module in the case, the heating module located in the same position area is subjected to heat dissipation by adopting the same air duct, and each air duct is provided with at least one fan.
Specifically, a three-dimensional position coordinate system is established in the VPX chassis, a position area of each heating module is marked in the three-dimensional position coordinate system, the temperature of each heating module is detected through a temperature sensor, and the temperature of each heating module is marked in the three-dimensional position coordinate system along with time change; therefore, the heating temperature change of each heating module generated along with the time can be observed in the operation process of the VPX chassis.
The previous embodiments take into account the required wind speed for the temperature in the wind tunnel and determine the fan speed based on the required wind speed.
In this embodiment, one air duct is used to dissipate heat from a plurality of heat generating modules, so that the temperature in the air duct reflects the comprehensive heat generating result of all the heat generating modules corresponding to the air duct.
However, the heat generation condition of each heat generation module is different, for example, the CPU module is liable to rapidly raise the temperature and needs to rapidly lower the temperature, so in this embodiment, the integrated wind speed that each heat generation module needs to provide for cooling is also considered. The comprehensive wind speed refers to the sum of wind speeds generated by the heating modules when all fans rotate.
Specific:
under the condition that a plurality of air channels are arranged, when each fan rotates independently to provide wind speed, the actual wind speed generated independently for each heating module is obtained, and when the jth fan provides wind speed independentlyWhen the temperature of the heating module is higher than the temperature of the heating module, the actual wind speed generated at the position of the ith heating module is +.>，/>A measured wind speed influence coefficient at the i-th heat generating module position for the wind speed generated by the j-th fan.
Thus, the wind speed provided by each fan, the combined wind speed for each heat generating module is:
；
wherein,for the ith heating module the integrated wind speed determined as a function of temperature,/->Measured wind speed influence coefficient at the position of the ith heating module for the wind speed generated by the jth fan,/>A wind speed provided for the j-th fan when rotated alone; j is the fan number, ">J is the number of fans; i is the serial number of the heating module, ">I is the number of heating modules, and the rotating speeds of all fans arranged in the same air duct are the same.
Wherein,and determining according to the measured temperature of the ith heating module. The number of fans is not more than the number of heating modules.
In a fifth embodiment of the method for controlling a rotational speed of a fan using airspeed detection according to the present invention, the step S40 includes:
step S41, collecting the temperature in each air duct, and collecting the temperature of a heating module corresponding to each air duct;
and step S42, determining a target wind speed corresponding to each air channel according to the temperature in each air channel and the temperature of the heating module corresponding to each air channel, wherein the target wind speed is greater than or equal to 0.
Specifically, in this embodiment, the target wind speed is not determined only according to the temperature in the air duct, but also by considering the temperature of the heat generating module corresponding to the air duct.
In a sixth embodiment of the method for controlling a rotational speed of a fan using airspeed detection according to the present invention, the step S42 includes:
step S421, determining a first wind speed corresponding to the temperature in the air duct according to the temperature in the air duct;
step S422, determining a second wind speed required by each heating module corresponding to the same air duct according to the temperature of the heating module corresponding to the same air duct;
step S423, calculating a target wind speed corresponding to the air duct according to the first wind speed and the second wind speed.
In step S421, according to the temperature in the air duct, a first air speed required in the air duct may be determined, so as to determine a first set rotational speed corresponding to each fan in the air duct according to the first air speed.
And setting the wind speed required by the set key heating module as a second wind speed according to the wind speed required by each heating module in the same air duct, and determining a second set rotating speed of the fan in each air duct when the second wind speed is provided for the key heating module according to the fourth embodiment.
The fan speed within each air duct is specified according to the greater of the first set rotational speed and the second set rotational speed.
In a seventh embodiment of the method for controlling a rotational speed of a fan using airspeed detection according to the second embodiment of the method for controlling a rotational speed of a fan using airspeed detection according to the present invention, the step S30 includes:
s31, inputting the collected wind speeds into the functional relation to obtain theoretical fan rotating speeds corresponding to each collected wind speed;
step S32, comparing the theoretical fan speed with the set fan speed to determine whether the deviation is within the set deviation;
if yes, go to step S33: judging that the fan runs normally;
if not, go to step S34: and judging that the fan is abnormal in operation.
In order to achieve the above purpose, the present invention further provides a VPX chassis, wherein the fan rotation speed is adjusted by the method for controlling the fan rotation speed using airspeed detection; the VPX chassis comprises a control module, wherein the control module comprises an airspeed sensing unit, a fan control unit, a fan speed regulating circuit and a fan which are connected in sequence in a signal mode.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part in the form of a software product stored in a computer readable storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device to enter the method according to the embodiments of the present invention.
In the description of the present specification, descriptions of terms "one embodiment," "another embodiment," "other embodiments," or "first embodiment through X-th embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, method steps or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. The method for controlling the rotating speed of the fan by utilizing the airspeed detection is characterized by comprising the steps of controlling the rotating speed of the fan by a control module, wherein the control module comprises an airspeed sensing unit, a fan control unit, a fan speed regulating circuit and a fan which are connected in sequence in a signal manner; the method comprises the following steps:
acquiring the wind speed in the air duct through an airspeed sensing unit, and acquiring a set fan rotating speed corresponding to the moment of acquiring the wind speed so as to determine the corresponding relation between the wind speed in the air duct and the fan rotating speed;
when the rotating speed of the fan needs to be regulated and controlled, collecting the wind speed in the air duct of the VPX chassis through the airspeed sensing unit, and collecting the temperature in the air duct of the VPX chassis through the temperature sensor;
the fan control unit judges whether the fan operates normally or not according to the collected wind speed and the set fan rotating speed corresponding to the collected wind speed moment;
if the wind speed is normal, determining a corresponding target wind speed according to the current temperature;
determining a target rotating speed of the fan according to the target wind speed and the corresponding relation between the wind speed and the rotating speed of the fan, and regulating the rotating speed of the fan to the target rotating speed through a fan speed regulating circuit;
and detecting the wind speed deviation between the measured wind speed and the target wind speed in the air duct of the VPX chassis, and regulating the rotating speed of the fan through a fan speed regulating circuit according to the wind speed deviation.
2. The method for controlling rotational speed of a fan using airspeed detection according to claim 1, wherein the step of acquiring the wind speed in the air duct by the airspeed sensing unit and acquiring the set rotational speed of the fan corresponding to the time when the wind speed is acquired to determine the correspondence between the wind speed in the air duct and the rotational speed of the fan comprises:
different fan rotating speeds between the set minimum rotating speed of the fan and the set maximum rotating speed of the fan are collected, and corresponding actual wind speeds in the air duct of the VPX chassis are respectively obtained to form a plurality of groups of sampling data;
establishing a rectangular coordinate system of wind speed and fan rotating speed by taking the corresponding actual wind speed in the air duct of the VPX chassis as an abscissa and the fan rotating speed as an ordinate;
in a rectangular coordinate system, each group of sampling data is drawn to form sampling points;
forming a sampling curve of wind speed and fan rotating speed according to all the sampling points;
and determining a functional relation between the wind speed and the fan rotating speed according to a sampling curve of the wind speed and the fan rotating speed.
3. The method for controlling rotational speed of a fan using airspeed detection of claim 2, wherein the step of determining the target rotational speed of the fan based on the target wind speed and the correspondence between the wind speed and the rotational speed of the fan, and adjusting the rotational speed of the fan to the target rotational speed by the fan speed adjustment circuit comprises:
inputting the target wind speed into the functional relation to output the target rotating speed of the fan corresponding to the target wind speed;
the fan speed is adjusted to the target speed by a fan speed adjusting circuit.
4. The method of controlling fan speed using airspeed detection of claim 1, further comprising:
acquiring the position and the heating temperature change of each heating module in the VPX chassis;
dividing the heating modules into a plurality of heating groups according to the position and the heating temperature change of the heating modules; wherein, each heating group adopts different air channels.
5. The method for controlling rotational speed of a fan using airspeed detection of claim 4, wherein the step of determining the corresponding target wind speed based on the current temperature comprises:
collecting the temperature in each air duct, and collecting the temperature of a heating module corresponding to each air duct;
and determining a target wind speed corresponding to each air channel according to the temperature in each air channel and the temperature of the heating module corresponding to each air channel, wherein the target wind speed is greater than or equal to 0.
6. The method of controlling rotational speed of a fan using airspeed detection of claim 5, wherein the step of determining the target wind speed for each duct based on the temperature in each duct and the temperature of the heat generating module for each duct comprises:
determining a first wind speed corresponding to the temperature in the air duct according to the temperature in the air duct;
determining a second wind speed required by each heating module corresponding to the same air duct according to the temperature of the heating module corresponding to the same air duct;
and calculating a target wind speed corresponding to the air duct according to the first wind speed and the second wind speed.
7. The method of controlling rotational speed of a fan using airspeed detection of claim 2, wherein the step of determining whether the fan is operating properly by the fan control unit based on the collected wind speed and the set rotational speed of the fan corresponding to the time when the wind speed was collected, comprises:
inputting the collected wind speeds into the functional relation to obtain theoretical fan rotating speeds corresponding to each collected wind speed;
comparing the theoretical fan speed with the set fan speed to determine whether the deviation is within the set deviation;
if yes, judging that the fan runs normally;
if not, judging that the fan is abnormal in operation.
8. The method of controlling fan speed using airspeed detection of claim 2, wherein the wind speed as a function of fan speed is:
；
wherein x is wind speed, y is fan rotation speed, A is set minimum fan rotation speed, B is set maximum fan rotation speed, C is wind speed corresponding to set minimum fan rotation speed, and D is wind speed corresponding to set maximum fan rotation speed.
9. The method of controlling fan speed using airspeed detection of claim 2, wherein the wind speed as a function of fan speed is:
；
wherein x is wind speed, y is fan rotation speed,，/>，/>for the sampling curve function, A is the set minimum rotation speed of the fan, B is the set maximum rotation speed of the fan, C is the wind speed corresponding to the set minimum rotation speed of the fan, and D is the wind speed corresponding to the set maximum rotation speed of the fan;
taking the step length n as the progress unit of the full curve calibration,wherein N is +.>The total step length is set between, at the fan speed +.>The total step length set in between is also N;
；
for a curve corresponding to a step length nOrdinate value of the end point of the line segment,/>For the ordinate value of the starting point of the curve segment corresponding to a step size n, +.>For the abscissa value of the end point of the curve segment corresponding to a step size n, +.>Is the abscissa value of the start point of the curve segment corresponding to the step length n.
10. A VPX chassis, wherein the fan speed is adjusted by the method of any one of claims 1 to 9 using airspeed detection to control fan speed; the VPX chassis comprises a control module, wherein the control module comprises an airspeed sensing unit, a fan control unit, a fan speed regulating circuit and a fan which are connected in sequence in a signal mode.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486181A (en) * | 2010-12-06 | 2012-06-06 | 中兴通讯股份有限公司 | Temperature control device and method for adjusting temperature in sealed equipment |
| CN106704234A (en) * | 2015-07-30 | 2017-05-24 | 联想(北京)有限公司 | Control method and device |
| CN111949101A (en) * | 2020-09-11 | 2020-11-17 | 苏州浪潮智能科技有限公司 | Server fan rotating speed regulating method, system, terminal and storage medium |
| CN114356055A (en) * | 2021-12-24 | 2022-04-15 | 深圳市宇通联发科技有限公司 | Server heat dissipation method, device, system and storage medium |
| CN115840684A (en) * | 2022-11-11 | 2023-03-24 | 苏州浪潮智能科技有限公司 | Method, device, equipment and medium for prompting abnormity of server heat dissipation air duct |
| CN117271272A (en) * | 2023-11-22 | 2023-12-22 | 湖南博匠信息科技有限公司 | BMC-based fan in-place state monitoring method and system |
-
2024
- 2024-01-16 CN CN202410058906.2A patent/CN117703811B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486181A (en) * | 2010-12-06 | 2012-06-06 | 中兴通讯股份有限公司 | Temperature control device and method for adjusting temperature in sealed equipment |
| CN106704234A (en) * | 2015-07-30 | 2017-05-24 | 联想(北京)有限公司 | Control method and device |
| CN111949101A (en) * | 2020-09-11 | 2020-11-17 | 苏州浪潮智能科技有限公司 | Server fan rotating speed regulating method, system, terminal and storage medium |
| CN114356055A (en) * | 2021-12-24 | 2022-04-15 | 深圳市宇通联发科技有限公司 | Server heat dissipation method, device, system and storage medium |
| CN115840684A (en) * | 2022-11-11 | 2023-03-24 | 苏州浪潮智能科技有限公司 | Method, device, equipment and medium for prompting abnormity of server heat dissipation air duct |
| CN117271272A (en) * | 2023-11-22 | 2023-12-22 | 湖南博匠信息科技有限公司 | BMC-based fan in-place state monitoring method and system |
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|---|---|
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