CN101876320B - Method and device for controlling fan speed - Google Patents
Method and device for controlling fan speed Download PDFInfo
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- CN101876320B CN101876320B CN201010207717.5A CN201010207717A CN101876320B CN 101876320 B CN101876320 B CN 101876320B CN 201010207717 A CN201010207717 A CN 201010207717A CN 101876320 B CN101876320 B CN 101876320B
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Abstract
The invention discloses a method and a device for controlling fan speed, which aims at solving the problem of weak functions of the scheme of fan speed control in the prior art. The method comprises the following steps: controlling the fan speed, detecting vibration amplitude of vibration-sensitive units in the device, and readjusting the fan speed based on the current fan speed if the detected vibration amplitude is greater than the threshold in the process of controlling the fan speed. The control on the fan speed based on vibration detection reduces the possibility of generating resonance. Thereby, the invention has the advantages that the functions are enhanced as compared with the prior art.
Description
Technical field
The invention belongs to automatic control technology field, be particularly useful for a kind of fan rotational frequency control method and equipment.
Background technology
Along with people are more and more higher to the requirement of various communication services, the function of telecommunication apparatus is more and more stronger, and power consumption sharply increases, and makes the heat dissipation problem of equipment more and more outstanding, in most equipment, need to arrange air-cooled radiating device, and the heat dissipation design of equipment has larger redundancy conventionally.The cost that possesses enough redundancies is exactly to adopt higher rotation speed of the fan and the more fan of usage quantity, and various equipment need to be adjusted rotation speed of the fan according to different operating modes and reached heat radiation object in actual applications.The way of the at present more common control rotation speed of the fan heat radiation of industry is such: equipment into and out of air port, lay temp probe, the temperature into and out of air port detecting by temp probe is controlled rotation speed of the fan.Because the method can only be controlled rotation speed of the fan based on temperature detection.The scheme function of in visible prior art, rotation speed of the fan being controlled a little less than.
Summary of the invention
In order to solve the weak problem of scheme function of in prior art, rotation speed of the fan being controlled, the embodiment of the present invention provides a kind of fan rotational frequency control method, comprising:
According to the detected temperatures of target temperature and equipment, the rotating speed of fan is carried out to control operation, and in checkout equipment, shake the shock value of Sensitive Apparatus;
The rotating speed of fan is being carried out in control procedure, if shock value detected, be greater than threshold value, based on current rotation speed of the fan, adopting the mode of sinusoidal speed governing to readjust the rotating speed of fan; While adopting the mode of sinusoidal speed governing to regulate the rotating speed of fan, adjacent fan is phase shifting each other.
The embodiment of the present invention also provides a kind of rotation speed of the fan opertaing device simultaneously, comprising:
Host computer, for carrying out control operation according to the detected temperatures of target temperature and equipment to the rotating speed of fan;
Shock sensor, for detection of the shock value that shakes Sensitive Apparatus in equipment;
Micro-control unit, for the rotating speed of fan is being carried out to control procedure, is greater than threshold value if shock value detected, adopts the mode of sinusoidal speed governing to readjust the rotating speed of fan; While adopting the mode of sinusoidal speed governing to regulate the rotating speed of fan, adjacent fan is phase shifting each other.
By specific embodiments provided by the invention, can be found out, just because of based on shock detection, rotating speed to fan is controlled, make to reduce the possibility of the resonance producing because of structure problem, and then reliability and the life-span of having improved equipment and vibration-sensitive device, compare function with the existing scheme that rotation speed of the fan is controlled and obtained reinforcement.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the first embodiment provided by the invention;
Fig. 2 is the second device for carrying out said structural drawing provided by the invention.
Embodiment
Below in conjunction with drawings and Examples, the embodiment of a kind of fan rotational frequency control method and equipment is described.
First the hardware of the present embodiment equipment is described, this equipment comprises fan, vibrations Sensitive Apparatus, shock sensor, temperature sensor, temperature sensor, host computer and MCU (micro-control unit, Micro Control Unit), at the air inlet place of equipment and temperature sensor as the key chip of equipment and PCB (printed circuit board (PCB), Printed circuit board) near, be provided with temperature sensor, wherein be located at the temperature sensor at air inlet place for detection of the environment temperature of equipment operation, near temperature sensor temperature sensor is for detection of the temperature of temperature sensor.(sensors with auxiliary electrode were is generally micro mechanical structure as the acceleration transducer based on MEMS technology at vibration-sensitive device, to lay shock sensor near as hard disk, with signal conditioning circuit, digital interface circuit is packaged into one single chip together, size only has several millimeters), for detection of the shock value of vibrations Sensitive Apparatus.In order to ensure equipment, can be operated in the temperature range of normal work, host computer is controlled the rotating speed of fan according to the detected temperatures of target temperature and equipment, such object is to guarantee that equipment can be operated in the temperature range of normal work, target temperature in the present embodiment can be the joint temperature of the normal work of key chip, and the detected temperatures of equipment comprises the temperature of the temperature sensor that detection obtains and the environment temperature of equipment operation.Certainly this is a preferred scheme, and host computer also can be controlled the rotating speed of fan according to other condition.As host computer is controlled the rotating speed of fan according to the utilization rate of CPU.The rotating speed of fan is being carried out in control procedure, if it is excessive that shock sensor detects vibrations, reach in the vibration that vibration-sensitive device allows in limited time, the speed controling signal that MCU can send based on host computer readjusts the rotating speed of fan, namely based on current rotation speed of the fan, readjusts the rotating speed of fan.
Need to carry out some experiments below and determine temperature control curve, find environment temperature, target temperature, Sensitive Apparatus temperature and the fan of equipment operation to adjust the relation between rotating speed.During concrete enforcement, equipment can be placed in to high-low temperature test chamber, oepration at full load, the high lower bound when height of the temperature setting of high-low temperature test chamber is limited to equipment and normally moves.For example, it is 20 that high-low temperature test chamber is set to the 20 degree environment temperature that now equipment moves, the target temperature of setting is now 30 degree, the Sensitive Apparatus temperature now measuring is 40 degree, according to the design object of this experiment cooling system, as within 30 seconds, reached thermal equilibrium, test obtains fan and adjusts rotating speed and should improve 500 revs/min.
After carrying out the definite temperature control curve of temperature rise experiment, just need to set up a PID (proportion integration differentiation according to definite temperature control curve, Proportion Integration Differentiation) control model, the temperature that the temperature that during actual motion, host computer detects near the temperature sensor key chip of the equipment detecting, the temperature sensor at air inlet place detect, and the joint temperature of the normal work of key chip is as input, be input to PID control model and obtain digital parameter fOut, fOut is corresponding with adjustment rotating speed.
The first embodiment provided by the invention is a kind of fan rotational frequency control method, and flow process as shown in Figure 1, comprises the following steps:
Step 101, temperature 18 degree that host computer detects according to air intake vent place sensor, tabling look-up 1, to obtain corresponding target temperature be 35 degree.
| Environment temperature (degree) | Target temperature (degree) |
| 0-10 | 30 |
| 10-20 | 35 |
| 20-30 | 40 |
| 30-40 | 45 |
Table 1
In the present embodiment, adopt the temperature 18 of air intake vent place sensor detection as the environment temperature of equipment operation, target temperature 35 degree refer to that the joint temperature of the normal work of key chip is 35 degree, system temperature rise be now 35 degree to deduct 18 degree be 7 degree, table 1 is the some that PID controls model.
Step 102, temperature 40 degree that host computer detects key chip place sensor subtract each other and obtain deviate ek=5 degree with target temperature 35 degree.
Step 103, host computer carries out PID computing produce output result fOut to deviate ek, and fOut=5 is for adjusting digital parameter corresponding to rotating speed.
While carrying out PID computing, according to the control model of the PID setting up before, this control model can be preserved the information such as the needed P of PID computing, I, D coefficient, adjustment parameter span in the present embodiment is 1-100, the number percent that represents maximum speed, for example maximum speed is 5400 revs/min, and fOut=5 represents to be 270 revs/min by 5% of 5400 revs/min of rotating speed raisings.
Step 104, host computer is corresponding digital parameter 50 according to current rotating speed, and adjusts the digital parameter 55 after being adjusted of digital parameter 5 that rotating speed is corresponding and send to MCU.
Step 105, MCU judges whether the shock value that MEMS sensor detects hard disk in equipment is greater than threshold value 100mg, if perform step 106, otherwise execution step 107.
MEMS (MEMS (micro electro mechanical system) for example, Micro-Electro-Mechanical Systems) shock value of hard disk in equipment to be detected be that 95mg is not more than threshold value 100mg to sensor, perform step 106, the shock value that MEMS sensor detects hard disk in equipment is that 105mg is greater than threshold value 100mg, performs step 107.
Step 106, MCU directly exports digital parameter 55 to fan PWM (pulse-length modulation, Pulse Width Modulation) controller, PWM controller output drive signal is to driving circuit, and under the driving of driving circuit, the rotating speed of fan is adjusted to 2970 revolutions per seconds.In the concrete process of implementing, the process of fan speed-regulating is the process of a reciprocal uninterrupted correction, need to, according to the detected temperatures of target temperature and equipment to real-time the controlling of the rotating speed of fan, guarantee based on adaptive control the dynamic quality correction of controlled system.In control procedure, require system according to measured parameter, as automatically system regulated according to the variation of the detected temperatures of equipment, to make system at any time in optimum condition.
In this step, using digital parameter 55 as numeral output, output to fan PWM controller, through PWM controller, obtain another output signal, this output signal is as the signal that is input to driving circuit.Digital parameter 55 after adjustment is speed controling signals, and as the PWM input signal of a constant.
Step 107, MCU readjusts digital parameter 55, the digital parameter after regulating to the output of PWM controller, PWM controller output drive signal is to driving circuit, and under the driving of driving circuit, the rotating speed of fan is readjusted.
Visible, above-mentioned, the rotating speed of fan is carried out in control procedure, because detecting shock value, MEMS sensor is greater than threshold value, therefore based on digital parameter 55 (based on current rotation speed of the fan), readjust the rotating speed of fan.While regulating the rotating speed of fan, can start the sinusoidal speed governing of fan, the digital parameter 55 based on after current adjustment, 2 acquisition offset parameter ± 4 of tabling look-up, are modulated into sine pulse width modulation (PWM) input signal by the digital parameter 55 after adjusting, and readjust the rotating speed of fan.When MCU adopts the mode of sinusoidal speed governing to regulate the rotating speed of fan, adjacent fan is phase shifting each other, two adjacent fan synchronizations for example, and a fan accelerates another fan and slows down, and guarantees to differ from one another at the rotating speed of these two fans of synchronization.MCU is used timer regularly to look into the shock value of hard disk, if the shock value checking in is greater than threshold value, according to the PWM input signal look-up table 2 of current constant, obtains the PWM output that corresponding sinusoidal side-play amount obtains, by regulating timing value can change sinusoidal frequency.
| Numeral parameter | Side-play amount |
| 31--50 | ±3 |
| 51-70 | ±4 |
| 71-80 | ±7 |
| 81-90 | ±10 |
Table 2
It is a kind of rotation speed of the fan opertaing device that embodiments of the invention provide the second embodiment, as shown in Figure 2, comprising:
Host computer 201, for carrying out control operation to the rotating speed of fan;
Shock sensor 202, for detection of the shock value that shakes Sensitive Apparatus in equipment;
Micro-control unit 203, for the rotating speed of fan is being carried out to control procedure, is greater than threshold value if shock value detected, based on current rotation speed of the fan, readjusts the rotating speed of fan.
Further, host computer 201, also for controlling the rotating speed of fan according to the detected temperatures of target temperature and equipment.
Further, host computer 201, also for determining target temperature according to the environment temperature of current device operation, according to the temperature of definite target temperature and temperature sensor, obtain deviate, deviate is carried out to pid calculation and obtain rotation speed of the fan adjusted value, according to adjusted value, the rotating speed of fan is controlled, the detected temperatures of equipment comprises the temperature of temperature sensor and the environment temperature of equipment operation.
Further, micro-control unit 203, also for adopting the mode of sinusoidal speed governing to regulate the rotating speed of fan.
Further, micro-control unit 203, also when adopting the mode of sinusoidal speed governing to regulate the rotating speed of fan, adjacent fan is phase shifting each other.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (4)
1. a fan rotational frequency control method, is characterized in that, comprising:
According to the detected temperatures of target temperature and equipment, the rotating speed of fan is carried out to control operation, and in checkout equipment, shake the shock value of Sensitive Apparatus;
The rotating speed of fan is being carried out in control procedure, if shock value detected, be greater than threshold value, based on current rotation speed of the fan, adopting the mode of sinusoidal speed governing to readjust the rotating speed of fan; While adopting the mode of sinusoidal speed governing to regulate the rotating speed of fan, adjacent fan is phase shifting each other.
2. the method for claim 1, it is characterized in that, according to the environment temperature of current device operation, determine target temperature, according to the temperature of definite target temperature and temperature sensor, obtain deviate, deviate is carried out to pid calculation and obtain rotation speed of the fan adjusted value, according to adjusted value, the rotating speed of fan is controlled, the detected temperatures of equipment comprises the temperature of temperature sensor and the environment temperature of equipment operation.
3. a rotation speed of the fan opertaing device, is characterized in that, comprising:
Host computer, for carrying out control operation according to the detected temperatures of target temperature and equipment to the rotating speed of fan;
Shock sensor, for detection of the shock value that shakes Sensitive Apparatus in equipment;
Micro-control unit, for the rotating speed of fan is being carried out to control procedure, is greater than threshold value if shock value detected, based on current rotation speed of the fan, adopts the mode of sinusoidal speed governing to readjust the rotating speed of fan; While adopting the mode of sinusoidal speed governing to regulate the rotating speed of fan, adjacent fan is phase shifting each other.
4. equipment as claimed in claim 3, it is characterized in that, host computer, also for determining target temperature according to the environment temperature of current device operation, according to the temperature of definite target temperature and temperature sensor, obtain deviate, deviate is carried out to pid calculation and obtain rotation speed of the fan adjusted value, according to adjusted value, the rotating speed of fan is controlled, the detected temperatures of equipment comprises the temperature of temperature sensor and the environment temperature of equipment operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010207717.5A CN101876320B (en) | 2010-06-13 | 2010-06-13 | Method and device for controlling fan speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010207717.5A CN101876320B (en) | 2010-06-13 | 2010-06-13 | Method and device for controlling fan speed |
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| CN101876320A CN101876320A (en) | 2010-11-03 |
| CN101876320B true CN101876320B (en) | 2014-11-05 |
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| CN201010207717.5A Active CN101876320B (en) | 2010-06-13 | 2010-06-13 | Method and device for controlling fan speed |
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| US8985068B2 (en) | 2010-07-22 | 2015-03-24 | Robert Bosch Gmbh | Systems and methods for avoiding resonances excited by rotating components |
| CN102521110A (en) * | 2011-12-31 | 2012-06-27 | 曙光信息产业股份有限公司 | Method for monitoring components in server |
| TWI432973B (en) * | 2012-03-27 | 2014-04-01 | Wistron Corp | Management module and storage system and temperature and vibration management method using the same |
| CN105094166A (en) * | 2014-05-22 | 2015-11-25 | 西安中兴新软件有限责任公司 | Method for temperature control of mobile terminal and mobile terminal |
| CN104536289A (en) * | 2014-10-31 | 2015-04-22 | 深圳市帅映科技有限公司 | Self-adaptive projector damping method, device and system |
| US10114432B2 (en) * | 2014-12-29 | 2018-10-30 | Mediatek Inc. | Thermal control system and thermal control method for electronic device |
| CN105336250A (en) * | 2015-12-02 | 2016-02-17 | 乌鲁木齐爱思特专利转让服务有限责任公司 | Photoelectric fish-basin demonstration instrument |
| CN106211721B (en) * | 2016-08-30 | 2019-05-24 | 北京思博康科技有限公司 | A kind of flow-optimized system of cabinet intelligent gas and the data center based on the system |
| CN106970692B (en) * | 2017-03-31 | 2019-11-08 | 新华三信息技术有限公司 | Rotation speed of the fan adjusting method and device |
| CN107831452A (en) * | 2017-10-31 | 2018-03-23 | 国网上海市电力公司 | DC control and protection system hostdown diagnoses and life appraisal equipment |
| CN107762936A (en) * | 2017-11-17 | 2018-03-06 | 英业达科技有限公司 | Temperature control equipment and its method |
| TWI660263B (en) * | 2017-11-22 | 2019-05-21 | 英業達股份有限公司 | Temperature control device and method thereof |
| CN108825543A (en) * | 2018-05-24 | 2018-11-16 | 郑州云海信息技术有限公司 | A kind of server fan regulation method and system |
| TWI686125B (en) | 2018-06-21 | 2020-02-21 | 神雲科技股份有限公司 | Fan Speed Control Optimization Method |
| CN110836195A (en) * | 2018-08-16 | 2020-02-25 | 佛山市顺德区顺达电脑厂有限公司 | Optimization method for fan rotating speed control |
| CN110594183B (en) * | 2019-10-11 | 2020-11-10 | 中车大连机车车辆有限公司 | Method and system for inhibiting resonance of vehicle-mounted fan |
| CN113138899B (en) * | 2021-04-27 | 2023-01-24 | 山东英信计算机技术有限公司 | Server fan vibration management and control method, system, terminal and storage medium |
| CN114738264A (en) * | 2022-04-26 | 2022-07-12 | 醴陵千汇实业有限公司 | Quick oil cooling system of plunger pump |
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| CN101876320A (en) | 2010-11-03 |
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