CN102562636B - Stepless speed adjusting method and control system for fan speed of wireless base station equipment - Google Patents
Stepless speed adjusting method and control system for fan speed of wireless base station equipment Download PDFInfo
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- CN102562636B CN102562636B CN201010608159.3A CN201010608159A CN102562636B CN 102562636 B CN102562636 B CN 102562636B CN 201010608159 A CN201010608159 A CN 201010608159A CN 102562636 B CN102562636 B CN 102562636B
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Abstract
The invention provides a stepless speed adjusting method and control system for the fan speed of wireless base station equipment. The adjustable resolution ratio of the fan speed is accurate to the inherently adjusted resolution ratio of the fan, and the fan speed adjustment is stepless. The primary fan speed is calculated by establishing a fan speed adjustment function via test data, and different weighted filtering methods are used to calculate the actual fan speed according to the fan speed variation trend. By using the stepless speed adjusting method and control system for the fan speed, no matter the adjustable resolution ratio of the fan speed is the fan speed adjustment function or stepless, the adjustment accuracy of the system can be improved, and an adjustment space is provided for system noise reduction. Weighed filtering is carried out on the actual fan speed according to the fan speed variation trend, quick following can be realized when the fan speed is increased, and slow following can be realized when the fan speed is reduced. Not only can the system satisfy the heat radiation requirement, but also power consumption is reduced.
Description
Technical field
The present invention relates to the heat dissipation technology of electronics or the communications field, particularly a kind of stepless speed regulating method of radio communication base station appts blower fan and control system.
Background technique
Under the continuous upgrading of communications equipment and integrated background, the heat density of circuit board is more and more higher, and in the communications equipment the inside of limited space, heat dissipation problem is more and more thorny.Common is difficult to meet heat radiation requirement by the method for radiating fin, and using blower fan forced refrigeration is method more easily at present.
But the use of blower fan faces some equally as problems such as noise, power consumption and reliable rotating speeds, and noise, power consumption and reliable rotating speed often exist contradiction.How the two contradiction of the reliable rotating speed of balance and other, finds best operating point, is the key that realizes blower fan refrigeration.
Fig. 1 is the schematic diagram of existing rotation speed of fan regulating method.Current fan regulation mechanism normally has level regulation and control, as shown in Figure 1, the rotating speed of blower fan is divided into a limited number of some grades, be several blower fan gears, according to Current Temperatures, calculate or find out corresponding required gear, then directly carrying out rotation speed of fan control, rotation speed of fan is adjusted to corresponding gear.
But there is following technical problem in the step speed regulation method of existing rotation speed of fan:
(1) in rotation speed of fan adjustment process, in the situation that gear has variation, be often accompanied by large adjustment, regulate action itself can produce larger noise, also be there is to injury in blower fan itself simultaneously.
(2) method that existing graduation regulates, itself has corresponding non-economy rotating speed problem, and actual demand air quantity is little, still, due to the restriction of blower fan grade, can only be adjusted to certain grade, thereby bring the waste in power consumption.
(3) according to the corresponding relation in Fig. 1, often cause occurring being just adjusted at once respective notch when a certain demand, and in the time that the variation of gear is larger, can cause again the larger variation of temperature of temperature transducer, then cause again the larger adjustment of gear, easily produce thus reforming phenomena.
Therefore, the method that existing blower fan has level to regulate exists the potential risk of non-economy rotating speed problem and concussion, and may reduce fan working life.
Summary of the invention
The stepless speed regulating method and the control system that the invention provides a kind of radio communication base station appts blower fan, its degree of regulation is high, and adjustment process is relatively mild, can reduce System noise and blower fan power consumption.
In order to address the above problem, the invention provides a kind of stepless speed regulating method of radio communication base station appts blower fan, the technological scheme that its technical problem of solution of the present invention adopts is:
A stepless speed regulating method for rotation speed of fans of wireless base station equipment, comprises the steps:
Steps A: set up corresponding to sensor temperature-rotation speed of fan function and the weighted filtering of each functional unit and process function;
Step B: the collection of each system temperature sense cycle is the sensor temperature of each functional unit in this wireless base station device once;
Step C: by sensor temperature-rotation speed of fan function ratio of the sensor temperature of each functional unit and corresponding functional unit, determine each functional unit required rotation speed of fan that dispels the heat;
Step D: dispel the heat the maximum value of required rotation speed of fan as the object rotation speed of fan of wireless base station device using each functional unit;
Step e: by object rotation speed of fan and current rotation speed of fan comparison, judge the variation tendency of rotation speed of fan, according to judged result, process function according to weighted filtering rotation speed of fan is weighted to filtering processing, draw actual output rotation speed of fan, if rotation speed of fan does not change, actual output rotation speed of fan equals object rotation speed of fan;
Step F: wireless base station device blower fan control system is the actual output rotation speed of fan running with described wireless base station device by pulse duration modulation (PWM) SC sigmal control blower fan;
Step G: repeating step B is to step F;
Wherein, described functional unit sensor temperature-rotation speed of fan function is to meet the sensor temperature of functional unit and the piecewise linear function of rotation speed of fan that predefined system derate requires;
Described weighted filtering is processed function and is comprised that function is processed in rotation speed of fan rising weighted filtering and function is processed in rotation speed of fan decline weighted filtering;
The duty cycle adjustment precision of described pwm signal equals the intrinsic adjusting resolution of described blower fan.
The present invention also provides a kind of control system of rotation speed of fans of wireless base station equipment, comprising:
Multiple functional units, each functional unit comprises that at least one tests the sensor of this functional unit temperature;
Blower fan, it is for the heat radiation of wireless base station device;
Main control unit, function is processed in sensor temperature-rotation speed of fan function of its pre-stored each functional unit and weighted filtering, for gathering the sensor temperature of each functional unit, determine the actual output rotation speed of fan of wireless base station device according to described sensor temperature-rotation speed of fan function and weighted filtering processing function, and export this actual output rotation speed of fan signal to air-blower control unit;
Air-blower control unit, its rotation speed of fan signal by main control unit output is converted into described in pwm signal control blower fan with the running of described actual output rotation speed of fan;
Wherein, described sensor temperature-rotation speed of fan function is to meet the sensor temperature of predefined system derate requirement and the piecewise linear function of rotation speed of fan;
Weighted filtering is processed function and is comprised that function is processed in rotation speed of fan rising weighted filtering and function is processed in rotation speed of fan decline weighted filtering;
The duty cycle adjustment precision of described pwm signal equals the intrinsic adjusting resolution of described blower fan.
Compared with existing blower fan step speed regulation method, the stepless speed regulating method of rotation speed of fan of the present invention and control system, the adjustable resolution or the fan speed regulation function that are rotation speed of fan are all nonrated, can improve the degree of regulation of system, for system noise reduction provides adjusting space.And according to rotation speed of fan variation tendency, blower fan actual speed is weighted to filtering, can follows fast in the time that rotation speed of fan improves, rotation speed of fan delays to follow while decline, not only can make system meet heat radiation requirement, and can reduce power consumption.
Brief description of the drawings
Fig. 1 is the schematic diagram of a kind of blower fan step speed regulation method in prior art.
Fig. 2 is the flow chart of the stepless speed regulating method of rotation speed of fans of wireless base station equipment of the present invention.
Fig. 3 is the schematic diagram of sensor temperature-rotation speed of fan function of the present invention.
Fig. 4 is the structural representation of the control system of rotation speed of fans of wireless base station equipment of the present invention.
Fig. 5 is an embodiment's of the stepless speed regulating method of rotation speed of fans of wireless base station equipment of the present invention flow chart.
Embodiment
The stepless speed regulating method and the control system that the invention provides a kind of radio communication base station appts blower fan, its degree of regulation is high, and adjustment process is relatively mild, can reduce System noise and blower fan power consumption.
Core concept of the present invention is: by the adjustable resolution of rotation speed of fan being accurate to the intrinsic adjusting resolution of blower fan, by steplessization of fan speed regulation.Set up fan speed regulation function by test data and carry out preliminary rotation speed of fan calculating, and complete the calculating of blower fan actual speed according to rotation speed of fan variation tendency with different weighted filtering methods.
As shown in Figure 2, the stepless speed regulating method of radio communication base station appts blower fan of the present invention mainly comprises the steps:
Steps A: set up corresponding to sensor temperature-rotation speed of fan function and the weighted filtering of each functional unit and process function;
Step B: the collection of each system temperature sense cycle is the sensor temperature of each functional unit in this wireless base station device once;
Step C: by the sensor temperature of each functional unit and corresponding sensor temperature-rotation speed of fan function ratio, determine each functional unit required rotation speed of fan that dispels the heat;
Step D: dispel the heat the maximum value of required rotation speed of fan as the object rotation speed of fan of wireless base station device using each functional unit;
Step e: by object rotation speed of fan and current rotation speed of fan comparison, judge the variation tendency of rotation speed of fan, according to judged result, process function according to weighted filtering rotation speed of fan is weighted to filtering processing, draw actual output rotation speed of fan, if rotation speed of fan does not change, actual output rotation speed of fan equals object rotation speed of fan;
Step F: wireless base station device blower fan control system is the actual output rotation speed of fan running with described wireless base station device by pwm signal control blower fan;
Step G: repeating step B is to step F;
Wherein, sensor temperature-rotation speed of fan function of described functional unit is to meet the sensor temperature of functional unit and the piecewise linear function of rotation speed of fan that predefined system derate requires;
Weighted filtering in described step e is processed function and is comprised that function is processed in rotation speed of fan rising weighted filtering and function is processed in rotation speed of fan decline weighted filtering;
The duty cycle adjustment precision of described pwm signal equals the intrinsic adjusting resolution of described blower fan.
In the present invention, the control of rotation speed of fan is realized by send pwm signal to rotation speed of fan unit, it is identical with the intrinsic adjusting resolution of blower fan by the duty cycle adjustment precision of this rotation speed of fan control pwm signal is adjusted to, can realize the conformity of the resolution of input signal and output signal, thereby realize steplessization of rotation speed of fan control.
For example: the intrinsic adjusting resolution of blower fan of wireless base station device is 1/2k, by the dutycycle of this rotation speed of fan control pwm signal is adjusted to 1/2k, thereby reach actual stepless speed regulation ability.
Corresponding, the present invention proposes a kind of step-less adjustment function of rotation speed of fan.That is, sensor temperature-rotation speed of fan function of the functional unit described in steps A, it is the sensor temperature of functional unit and the piecewise linear function of rotation speed of fan meeting under predefined system derate requirement.Its establishment method comprises:
Steps A 1: thermocouple is fixed on to the shell temperature reference point of main workpiece of each functional unit to measure the temperature of main workpiece, operation of radio base station equipment, under an ambient temperature, manually adjust rotation speed of fan, until the temperature of the shell temperature reference point of the main workpiece of each functional unit meets the requirement of predefined system derate, record corresponding sensor temperature t and rotation speed of fan y;
Wherein, the main workpiece of each functional unit is generally the parts of on critical component on this functional unit or this functional unit, ambient temperature being had relatively high expectations.
In when experiment, carry out ambient temperature control with incubator, each representative temperature point is carried out to rotation speed of fan manual tune, find relative optimum speed.
Ambient temperature, sensor temperature and rotation speed of fan, three has formed a three-dimensional curved surface on three-dimensional coordinate, in the time having introduced the qualifications of shell temperature drop volume value of main workpiece, the target shell temperature of pursuing is definite, and sensor temperature and rotation speed of fan are two-dimentional corresponding relations.The introducing of this qualifications, can either make system meet heat radiation requirement, can reduce power consumption simultaneously.
By manual tune rotation speed of fan, make the shell temperature of main workpiece reach target shell temperature, reach the requirement of system derate, the sensor temperature t now obtaining and rotation speed of fan y are a pair of determined values.
Preferably, described system derate requirement is 10%.
Steps A 2: change described ambient temperature, record sensor temperature t corresponding under this ambient temperature
1with rotation speed of fan y
1;
Steps A 3: repeating step A2, the n recording in the operating temperature range of described wireless base station device organizes corresponding sensor temperature t
iwith rotation speed of fan y
i;
Preferably, the operating temperature range of wireless base station device is-5 DEG C to 55 DEG C.Within the scope of this, determine many group board sensor temperature t
iwith rotation speed of fan y
i.
Steps A 4: organize corresponding sensor temperature t according to described n
iwith rotation speed of fan y
i, sensor temperature-rotation speed of fan function of foundation each functional unit as shown in Figure 3.
Wherein, y
0=blower fan minimum speed (x≤t
0);
y
1＝b
1×x+c
1 (t
0≤x≤t
1)；
……
y
i＝b
i×x+c
i (t
i-1≤x≤t
i)；
……
Y
n=blower fan maximum (top) speed (x>=t
n), i is the positive integer that is less than or equal to n.
Organize corresponding sensor temperature t according to described n
iwith rotation speed of fan y
i, by two neighboring sensors temperature t
i-1and t
icorresponding rotation speed of fan y
i-1and y
i, can determine at t
i-1≤ x≤t
isensor temperature-rotation speed of fan function in interval, wherein, at x≤t
0interval, rotation speed of fan y
0=blower fan minimum speed, at x>=t
ninterval, rotation speed of fan y
n=blower fan maximum (top) speed.By the function combination in each interval, can obtain sensor temperature-rotation speed of fan function of this functional unit.
Preferably, t
n-t
n-1=...=t
i-t
i-1=...=t
1-t
0.This temperature interval can determine according to the needed degree of regulation of system, and for example, can select this temperature interval is 5 DEG C.
In sensor temperature-rotation speed of fan function of the present invention, because the rotation speed of fan speed governing function of naming a person for a particular job according to each representative temperature has been divided into several minizones, the rotation speed of fan speed governing function in this interval has been carried out linearization process by the method for utilizing again boundary point to do interpolation in this minizone, make can both correspond to the most applicable in arbitrary temperature of the operating temperature range of wireless base station device, and save the rotation speed of fan of power consumption most, instead of the relatively wide temperature range of picture step speed regulation of the prior art is interior corresponding to a rotation speed of fan, thereby really realize the adjustment of steplessization of rotation speed of fan.The speed governing function of this piece-wise linearization, can make the real-time adjustment of rotation speed of fan, closer to system requirements, to compare the thick lines control of existing step speed regulation, can make the degree of regulation of rotation speed of fan be improved, and reduce blower fan power consumption.
On the basis of adjusting in steplessization, solve the oscillation problem (ping-pong) easily producing in rotation speed of fan speed governing, the present invention is performing step D: the maximum value of the required rotation speed of fan that dispels the heat using each functional unit is after the object rotation speed of fan of wireless base station device, directly this object rotation speed of fan output is not adjusted to rotation speed of fan, but according to the variation tendency of rotation speed of fan, rotation speed of fan is weighted to filtering processing, be divided into rotation speed of fan rising weighted filtering processing and rotation speed of fan decline weighted filtering and process two kinds., execution step E.
Step e: by object rotation speed of fan and current rotation speed of fan comparison, judge the variation tendency of rotation speed of fan, according to judged result, process function according to weighted filtering rotation speed of fan is weighted to filtering processing, draw actual output rotation speed of fan, if rotation speed of fan does not change, actual output rotation speed of fan equals object rotation speed of fan.
Wherein, rotation speed of fan rising weighted filtering processing function is:
Actual output rotation speed of fan=a
1× object rotation speed of fan+a
2× current rotation speed of fan;
Function is processed in rotation speed of fan decline weighted filtering:
Actual output rotation speed of fan=a
3× object rotation speed of fan+a
4× current rotation speed of fan;
A
1+ a
2=1, and a
1> a
2,
A
3+ a
4=1, and a
3< a
4.
Process function according to above two kinds of weighted filterings known, in the time that rotation speed of fan rises adjusting, rotation speed of fan is system for tracking demand fast, and in the time that rotation speed of fan declines adjusting, rotation speed of fan can be compared with slow decreasing, to protect the work safety of each components and parts.
The weighted filtering process of the application of the invention, relatively mild to the adjustment process of blower fan, can prevent the oscillatory occurences that blower fan causes while adjustment by a relatively large margin, and less to the impact of blower fan, can extend the working life of blower fan.
From above method, apply the stepless speed regulating method of rotation speed of fan of the present invention, be that adjustable resolution or the fan speed regulation function of rotation speed of fan is all nonrated, can improve the degree of regulation of system, for system noise reduction provides adjusting space.And according to rotation speed of fan variation tendency, blower fan actual speed is weighted to filtering, can follows fast in the time that rotation speed of fan improves, rotation speed of fan delays to follow while decline, not only can make system meet heat radiation requirement, and can reduce power consumption.
The present invention also provides a kind of control system of rotation speed of fans of wireless base station equipment.Fig. 4 shows the structural representation into this control system, and as shown in Figure 4, this control system comprises: multiple functional units 401, main control unit 402, air-blower control unit 403 and blower fan 404.Each functional unit 401 includes at least one and tests the sensor of this functional unit temperature.
Wherein, main control unit 402 is decision packages of whole control system, and the control of main control unit 402 is divided into preliminary decision-making and filtering two-part.Main control unit 402 is the temperature sensing actuator temperature of each functional unit 401 of Real-time Collection first, then according to sensor temperature-rotation speed of fan function of this functional unit, decision-making produces corresponding rotation speed of fan control information, this information, after weighted filtering is processed, sends to air-blower control unit 403 to control the rotating speed of blower fan 404.
Wherein, main control unit 402 comprises preliminary decision-making module 405 and filtration module 406.Sensor temperature-rotation speed of fan function of each functional unit is pre-stored among preliminary decision-making module 405, and weighted filtering is processed function and is pre-stored among filtration module 406.
Wherein, sensor temperature-rotation speed of fan function as shown in Figure 3, as previously mentioned, is to sum up and calculate according to pre-trial data, and the rotation speed of fan of this function output is that off grade is divided, and therefore can realize the stepless speed regulation to rotation speed of fan.
Preliminary decision-making module 405 gathers the temperature sensing actuator temperature of each functional unit 401, and produces the control information of object rotation speed of fan according to sensor temperature-rotation speed of fan function decision-making of this functional unit, then exports filtration module 406 to.Filtration module 406 is by object rotation speed of fan and current rotation speed of fan comparison, judge the variation tendency of rotation speed of fan, according to judged result, process function according to weighted filtering rotation speed of fan is weighted to filtering processing, draw actual output rotation speed of fan, if rotation speed of fan does not change, actual output rotation speed of fan equals object rotation speed of fan.
Wherein, this weighted filtering processing is divided into rotation speed of fan rising weighted filtering processing and rotation speed of fan decline weighted filtering and processes two kinds.
Function is processed in rotation speed of fan rising weighted filtering:
Actual output rotation speed of fan=a
1× object rotation speed of fan+a
2× current rotation speed of fan;
Function is processed in rotation speed of fan decline weighted filtering:
Actual output rotation speed of fan=a
3× object rotation speed of fan+a
4× current rotation speed of fan;
A
1+ a
2=1, and a
1> a
2,
A
3+ a
4=1, and a
3< a
4.
Process function according to above two kinds of weighted filterings known, in the time that rotation speed of fan rises adjusting, rotation speed of fan is system for tracking demand fast, and in the time that rotation speed of fan declines adjusting, rotation speed of fan can be compared with slow decreasing, to protect the work safety of each components and parts.
Air-blower control unit 403 can be embedded in main control unit 402, also can be independent of main control unit 402.The rotation speed of fan control information that air-blower control unit 403 is exported according to main control unit 402, is converted into corresponding PWM blower fan working control signal, and sends to blower fan 404.
The present invention is identical with the intrinsic adjusting resolution of blower fan by the duty cycle adjustment precision of this rotation speed of fan control pwm signal is adjusted to, and can realize the conformity of the resolution of input signal and output signal, thereby realize steplessization of rotation speed of fan control.
For example: the intrinsic adjusting resolution of blower fan of wireless base station device is 1/2k, by the dutycycle of this rotation speed of fan control pwm signal is adjusted to 1/2k, thereby reach actual stepless speed regulation ability.
Therefore, in the control system of the rotation speed of fan of wireless base station device of the present invention, be that adjustable resolution or the fan speed regulation function of rotation speed of fan is all nonrated, can improve the degree of regulation of system, for system noise reduction provides adjusting space.And according to rotation speed of fan variation tendency, blower fan actual speed is weighted to filtering processing, can follows fast in the time that rotation speed of fan improves, rotation speed of fan delays to follow while decline, not only can make system meet heat radiation requirement, and can reduce power consumption.
Fig. 5 is the workflow diagram of the control system of the rotation speed of fan of wireless base station device of the present invention.As shown in Figure 5, the working procedure of control system of the present invention comprises:
Step 501: system initialization and parameter configuration;
In the time that wireless base station device is started working, wireless base station device carries out initialization, and described sensor temperature-rotation speed of fan function and weighted filtering processing function are issued to main control unit 402, to configure the current rotation speed of fan of each functional unit 401.
Step 502: the temperature sensing actuator temperature of main control unit 402 each working cells of Real-time Collection;
Wherein, each working cell comprises each functional unit 401 and main control unit 402.
Step 503: main control unit 402 carries out preliminary decision-making according to sensor temperature-rotation speed of fan function, determines the needed maximum wind speed of wireless base station device;
Step 504: the filtration module of main control unit 402 judges rotation speed of fan variation tendency, processes function according to weighted filtering the decision-making wind speed in step 503 is carried out to filtering processing;
Step 505: main control unit exports rotation speed of fan control information after treatment filtering to air-blower control unit 403, air-blower control unit 403 is translated into pwm control signal output, exports corresponding rotating speed thereby control blower fan;
Step 506: repeating step 502 to 505.
Have compared with grade fan speed regulation method with existing, the stepless speed regulating method of rotation speed of fan of the present invention and control system, the adjustable resolution or the fan speed regulation function that are rotation speed of fan are all nonrated, can improve the degree of regulation of system, for system noise reduction provides adjusting space.And according to rotation speed of fan variation tendency, blower fan actual speed is weighted to filtering, can follows fast in the time that rotation speed of fan improves, rotation speed of fan delays to follow while decline, not only can make system meet heat radiation requirement, and can reduce power consumption.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (12)
1. a stepless speed regulating method for rotation speed of fans of wireless base station equipment, is characterized in that, comprises the steps:
Steps A: set up corresponding to sensor temperature-rotation speed of fan function and the weighted filtering of each functional unit and process function;
Step B: the collection of each system temperature sense cycle is the sensor temperature of each functional unit in this wireless base station device once;
Step C: by sensor temperature-rotation speed of fan function ratio of the sensor temperature of each functional unit and corresponding functional unit, determine each functional unit required rotation speed of fan that dispels the heat;
Step D: dispel the heat the maximum value of required rotation speed of fan as the object rotation speed of fan of wireless base station device using each functional unit;
Step e: by object rotation speed of fan and current rotation speed of fan comparison, judge the variation tendency of rotation speed of fan, according to judged result, process function according to weighted filtering rotation speed of fan is weighted to filtering processing, draw actual output rotation speed of fan, if rotation speed of fan does not change, actual output rotation speed of fan equals object rotation speed of fan;
Step F: wireless base station device blower fan control system is the actual output rotation speed of fan running with described wireless base station device by pwm signal control blower fan;
Step G: repeating step B is to step F;
Wherein, sensor temperature-rotation speed of fan function of described functional unit is to meet the sensor temperature of functional unit and the piecewise linear function of rotation speed of fan that predefined system derate requires;
Described weighted filtering is processed function and is comprised that function is processed in rotation speed of fan rising weighted filtering and function is processed in rotation speed of fan decline weighted filtering;
The duty cycle adjustment precision of described pwm signal equals the intrinsic adjusting resolution of described blower fan;
Function is processed in rotation speed of fan rising weighted filtering in described step e:
Actual output rotation speed of fan=a
1× object rotation speed of fan+a
2× current rotation speed of fan;
Function is processed in rotation speed of fan decline weighted filtering:
Actual output rotation speed of fan=a
3× object rotation speed of fan+a
4× current rotation speed of fan;
Wherein, a
1+ a
2=1, and a
1>a
2,
A
3+ a
4=1, and a
3<a
4.
2. the stepless speed regulating method of rotation speed of fans of wireless base station equipment according to claim 1, is characterized in that, described steps A comprises:
Steps A 1: thermocouple is fixed on to the shell temperature reference point of main workpiece of each functional unit to measure the temperature of main workpiece, operation of radio base station equipment, under an ambient temperature, manually adjust rotation speed of fan, until the temperature of the shell temperature reference point of the main workpiece of each functional unit meets the requirement of predefined system derate, record corresponding sensor temperature t and rotation speed of fan y;
Steps A 2: change described ambient temperature, record sensor temperature t corresponding under this ambient temperature
1with rotation speed of fan y
1;
Steps A 3: repeating step A2, the n recording in the operating temperature range of described wireless base station device organizes corresponding sensor temperature t
iwith rotation speed of fan y
i;
Steps A 4: organize corresponding sensor temperature t according to described n
iwith rotation speed of fan y
i, set up sensor temperature-rotation speed of fan function of each functional unit,
Wherein, y
0=blower fan minimum speed (x≤t
0);
y
1＝b
1×x+c
1(t
0≤x≤t
1)；
……
y
i＝b
i×x+c
i(t
i-1≤x≤t
i)；
……
Y
n=blower fan maximum (top) speed (x>=t
n), i is the positive integer that is less than or equal to n.
3. the stepless speed regulating method of rotation speed of fans of wireless base station equipment according to claim 2, is characterized in that,
The operating temperature range of described wireless base station device is-5 DEG C to 55 DEG C;
It is 10% that described system derate requires.
4. according to the stepless speed regulating method of the rotation speed of fans of wireless base station equipment described in claim 2 or 3, it is characterized in that t
n– t
n-1=...=t
i– t
i-1=...=t
1– t
0.
5. the stepless speed regulating method of rotation speed of fans of wireless base station equipment according to claim 4, is characterized in that, between steps A and step B, further comprises:
Steps A 5: the initialization of wireless base station device blower fan control system, process function and configure the current rotation speed of fan of each functional unit according to described sensor temperature-rotation speed of fan function and weighted filtering.
6. a control system for rotation speed of fans of wireless base station equipment, is characterized in that, comprising:
Multiple functional units, each functional unit comprises that at least one tests the sensor of this functional unit temperature;
Blower fan, it is for the heat radiation of wireless base station device;
Main control unit, function is processed in sensor temperature-rotation speed of fan function of its pre-stored each functional unit and weighted filtering, for gathering the sensor temperature of each functional unit, determine the actual output rotation speed of fan of wireless base station device according to described sensor temperature-rotation speed of fan function and weighted filtering processing function, and export this actual output rotation speed of fan signal to air-blower control unit;
Air-blower control unit, its rotation speed of fan signal by main control unit output is converted into described in pwm signal control blower fan with the running of described actual output rotation speed of fan;
Wherein, described sensor temperature-rotation speed of fan function is to meet the sensor temperature of predefined system derate requirement and the piecewise linear function of rotation speed of fan;
Weighted filtering is processed function and is comprised that function is processed in rotation speed of fan rising weighted filtering and function is processed in rotation speed of fan decline weighted filtering;
The duty cycle adjustment precision of described pwm signal equals the intrinsic adjusting resolution of described blower fan.
7. the control system of rotation speed of fans of wireless base station equipment according to claim 6, is characterized in that, described main control unit determines that the actual output rotation speed of fan of wireless base station device comprises:
The collection of each system temperature sense cycle is the sensor temperature of each functional unit in this wireless base station device once;
By the sensor temperature of each functional unit and corresponding sensor temperature-rotation speed of fan function ratio, determine each functional unit required rotation speed of fan that dispels the heat;
Dispel the heat the maximum value of required rotation speed of fan as the object rotation speed of fan of wireless base station device using each functional unit;
By object rotation speed of fan and current rotation speed of fan comparison, judge the variation tendency of rotation speed of fan, according to judged result, process function according to weighted filtering rotation speed of fan is weighted to filtering processing, draw actual output rotation speed of fan, if rotation speed of fan does not change, actual output rotation speed of fan equals object rotation speed of fan.
8. the control system of rotation speed of fans of wireless base station equipment according to claim 7, is characterized in that, described rotation speed of fan rising weighted filtering is processed function and is:
Actual output rotation speed of fan=a
1× object rotation speed of fan+a
2× current rotation speed of fan;
Function is processed in rotation speed of fan decline weighted filtering:
Actual output rotation speed of fan=a
3× object rotation speed of fan+a
4× current rotation speed of fan;
Wherein, a
1+ a
2=1, and a
1>a
2,
A
3+ a
4=1, and a
3<a
4.
9. the control system of rotation speed of fans of wireless base station equipment according to claim 8, is characterized in that, the establishment method that function is processed in described sensor temperature-rotation speed of fan function and weighted filtering comprises:
Steps A 1: thermocouple is fixed on to the shell temperature reference point of main workpiece of each functional unit to measure the temperature of main workpiece, operation of radio base station equipment, under an ambient temperature, manually adjust rotation speed of fan, until the temperature of the shell temperature reference point of the main workpiece of each functional unit meets the requirement of predefined system derate, record corresponding sensor temperature t and rotation speed of fan y;
Steps A 2: change described ambient temperature, record sensor temperature t corresponding under this ambient temperature
1with rotation speed of fan y
1;
Steps A 3: repeating step A2, the n recording in the operating temperature range of described wireless base station device organizes corresponding sensor temperature t
iwith rotation speed of fan y
i;
Steps A 4: organize corresponding sensor temperature t according to described n
iwith rotation speed of fan y
i, set up sensor temperature-rotation speed of fan function of each functional unit,
Wherein, y
0=blower fan minimum speed (x≤t
0);
y
1＝b
1×x+c
1(t
0≤x≤t
1)；
……
y
i＝b
i×x+c
i(t
i-1≤x≤t
i)；
……
Y
n=blower fan maximum (top) speed (x>=t
n), i is the positive integer that is less than or equal to n.
10. the control system of rotation speed of fans of wireless base station equipment according to claim 9, is characterized in that,
The operating temperature range of described wireless base station device is-5 DEG C to 55 DEG C;
It is 10% that described system derate requires.
The control system of 11. rotation speed of fans of wireless base station equipments according to claim 9, is characterized in that, t
n– t
n-1=...=t
i– t
i-1=...=t
1– t
0.
The control system of 12. rotation speed of fans of wireless base station equipments according to claim 9, it is characterized in that, when wireless base station device is started working, this equipment carries out initialization, and described sensor temperature-rotation speed of fan function and weighted filtering processing function are issued to main control unit, to configure current rotation speed of fan.
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| CN103074914B (en) * | 2013-01-18 | 2015-12-09 | 中联重科股份有限公司渭南分公司 | Engineering machinery heat dissipation control system, control method and excavator |
| CN107453541A (en) * | 2016-06-01 | 2017-12-08 | 德昌电机(深圳)有限公司 | Motor and the fan with the motor |
| CN108131794B (en) * | 2017-12-15 | 2021-09-10 | 广东美的制冷设备有限公司 | Air conditioner fan control method, electronic device and computer readable storage medium |
| CN109098999B (en) * | 2018-07-28 | 2020-04-21 | 中国船舶重工集团公司第七一六研究所 | Electronic equipment fan rotating speed control method and control device |
| CN111550426B (en) * | 2020-03-27 | 2022-10-14 | 普联技术有限公司 | Temperature adjusting method and device, terminal equipment and storage medium |
| CN113286407A (en) * | 2021-04-02 | 2021-08-20 | 格力电器(南京)有限公司 | Ion fan control device and ion fan |
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