CN102102679A - Control system and method for regulating fan speed dynamically - Google Patents
Control system and method for regulating fan speed dynamically Download PDFInfo
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- CN102102679A CN102102679A CN2009102608701A CN200910260870A CN102102679A CN 102102679 A CN102102679 A CN 102102679A CN 2009102608701 A CN2009102608701 A CN 2009102608701A CN 200910260870 A CN200910260870 A CN 200910260870A CN 102102679 A CN102102679 A CN 102102679A
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Abstract
The invention provides a control system and method for regulating the fan speed dynamically. According to the invention, the control system comprises a first sensor, a second sensor and a controller, wherein the first sensor can detect the environment state, and the second sensor can detect the radiating target temperature; the controller is preset with a preset critical value, the relationship between a first temperature and the fan speed as well as the relationship between a second temperature and the fan speed; the controller obtains an environment reference value according to the environment state detected by the first sensor, and compares the environment reference value with the preset critical value; if the environment reference value is greater than the preset critical value, the controller controls the fan speed according to the relationship between the first temperature and the fan speed and the radiating target temperature; and if the environment reference value is less than the preset critical value, the controller controls the fan speed according to the relationship between the second temperature and the fan speed and the radiating target temperature. According to the invention, the fan speed can be controlled through utilizing different radiating target temperatures for the relationship of the fan speed according to different environments.
Description
Technical field
The present invention relates to a kind of control system and method for dynamic adjustment rotation speed of the fan, and especially, the present invention relates to a kind of according to ambient noise and temperature control system and method with dynamic adjustment rotation speed of the fan.
Background technique
In the radiation system of traditional electronic devices, utilize fan or water-cooled pump to realize the purpose of dispelling the heat mostly.And in the rotating speed controlling mechanism of fan and water-cooled pump, be according to heat radiation target (for example, microprocessor, drawing chip, North Bridge chip ...) or ambient temperature on every side be foundation, control the increase and decrease of rotating speed by a control chip.
See also Fig. 1, Figure 1 shows that rotation speed of the fan is to the graph of a relation of the temperature of heat radiation target in known radiation system.The rotating speed of fan is to adjust between a minimum speed 1000rpm and a maximum speed 3000rpm.
When the temperature of heat radiation target is during in the condition of high temperature that is higher than 60 ℃, control chip will be controlled fan with maximum (top) speed numerical value 3000rpm running, to satisfy heat radiation target big radiating requirements at this moment.When the temperature of heat radiation target was reduced to 40 ℃ to 60 ℃ middle isothermal area gradually, the radiating requirements of the target of dispelling the heat this moment reduced thereupon, and does not need radiation system that maximum heat dissipation potential is provided.Therefore along with the decrease of temperature of heat radiation target, control chip will be controlled fan and reduce rotating speed gradually, to reduce the noise that fan was caused.At this moment, the rotating speed of the temperature of heat radiation target and fan is linear.When the temperature of heat radiation target was reduced to low-temperature region below 40 ℃, this moment, radiation system only need provide minimum heat dissipation potential can satisfy the radiating requirements of heat radiation target.Therefore control chip will be controlled fan with minimum speed numerical value 1000rpm running, can make fan have the performance of minimum level of noise thus.
Yet when practice, in more noisy environment, the user ignores the noise of fan easily, therefore can higher degrees of tolerance can be arranged to the noise that radiation system produces.In environment quietly, the user holds and is easier to notice the noise of fan, thereby the noise performance characteristic can more take notice of operating heat radiation system the time.The mechanism of above-mentioned control rotation speed of the fan is not considered the influence of the noise level of environment to user's impression.
Summary of the invention
Therefore, a purpose of the present invention is to provide a kind of method of dynamic adjustment rotation speed of the fan, to solve prior art problems.
Method of the present invention comprises the following step: at first, obtain the environment reference value.Then detect the heat radiation target temperature to obtain Temperature numerical.At last, compare environment reference value and preset critical.If the environment reference value is greater than preset critical, according to first temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan.If the environment reference value is less than preset critical, according to second temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan.
Another object of the present invention is to provide a kind of control system of dynamic adjustment rotation speed of the fan, to solve prior art problems.
Control system of the present invention comprises first sensor, second sensor and controller.First sensor is in order to the testing environment state, and the output environment sensing signal.Second sensor is in order to detection heat radiation target temperature, and the output temperature sensing signal.Controller is electrically connected fan, first sensor and second sensor, and controller is preset with preset critical, first temperature and rotation speed of the fan relation and second temperature and rotation speed of the fan relation.Controller obtains the environment reference value according to the environment sensing signal, and controller obtains Temperature numerical according to temperature sensing signal, and controller compares environment reference value and preset critical.If the environment reference value is greater than preset critical, then controller is according to first temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan.If the environment reference value is less than preset critical, then controller is according to second temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan.
In sum, according to the method and the control system of dynamic adjustment rotation speed of the fan of the present invention, can be according to user's difference to the noise tolerance under varying environment, and use different heat radiation target temperatures to the rotation speed of the fan relation with the control rotation speed of the fan.Thus, use the radiation system of the method and the control system of dynamic adjustment rotation speed of the fan of the present invention, can reach better noise suppression performance, improve the impression of user for the radiation system noise.
Can utilize the following detailed description and accompanying drawings to be further understood about the advantages and spirit of the present invention.
Description of drawings
Figure 1 shows that rotation speed of the fan is to the graph of a relation of the temperature of heat radiation target in known radiation system.
Fig. 2 A is depicted as the functional-block diagram of control system of the dynamic adjustment rotation speed of the fan of first specific embodiment of the present invention.
Fig. 2 B is depicted as the functional-block diagram of control system of the dynamic adjustment rotation speed of the fan of second specific embodiment of the present invention.
Fig. 3 A is depicted as according to temperature in first temperature of a specific embodiment of the present invention and the rotation speed of the fan relation the graph of relation of rotation speed of the fan.
Fig. 3 B is depicted as according to temperature in second temperature of a specific embodiment of the present invention and the rotation speed of the fan relation the graph of relation of rotation speed of the fan.
Figure 4 shows that the method flow diagram of the dynamic adjustment rotation speed of the fan of a specific embodiment of the present invention.
Embodiment
The invention provides a kind of method and control system of dynamic adjustment rotation speed of the fan, can provide the control corresponding pattern, and then dynamically adjust the relation of heat radiation target temperature rotation speed of the fan according to the varying environment state.Disclose as follows about the method for dynamic adjustment rotation speed of the fan of the present invention and some specific embodiments of control system.
See also Fig. 2 A, Fig. 2 A is depicted as the functional-block diagram of control system 1 of the dynamic adjustment rotation speed of the fan of first specific embodiment of the present invention.As shown in the figure, the control system 1 of dynamic adjustment rotation speed of the fan of the present invention comprises controller 10, first sensor 12 and second sensor 14.
See also Fig. 3 A and 3B, be respectively shown in Fig. 3 A and the 3B in first temperature and rotation speed of the fan relation and second temperature and rotation speed of the fan relation according to a specific embodiment of the present invention, temperature is to the graph of relation of rotation speed of the fan.As shown in the figure, first temperature and rotation speed of the fan relation and second temperature and rotation speed of the fan close and tie up to below 40 ℃ and the temperature range more than 60 ℃, all are set so that fan 2 turns round with minimum speed numerical value 1000rpm and maximum (top) speed numerical value 3000rpm respectively.
Yet in the time of in 40 ℃ to 60 ℃ temperature range, the rotation speed of the fan in first temperature and rotation speed of the fan relation promptly begins to present more precipitous lifting speed curve at the lower temperature place, thereby more positive suitable being used in the more noisy environment of control mode of this kind.And in second temperature and rotation speed of the fan relation, rotation speed of the fan then presents one than the lifting speed curve that relaxes when lower temperature is interval, and this kind control mode is suitable to be used in the quiet environment.Also promptly, according to uniform temp numerical value, then the rotation speed of the fan that calculates by first temperature and rotation speed of the fan relation is more than or equal to the rotation speed of the fan that calculates by second temperature and rotation speed of the fan relation.
Subsequently, controller 10 will compare environment reference value and preset critical.In actual applications, preset critical can be set by the artificer or the user of control system 1.If the environment reference value is greater than preset critical, then represent control system 1 to be in the more noisy environment, this moment, the user can have higher degrees of tolerance for the noise of fan 2, so controller 10 can be according to first temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan.If the environment reference value is less than preset critical, then represent control system 1 to be in the quiet environment, this moment, the user had lower degrees of tolerance for the noise of fan 2, so controller 10 can be according to second temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan.
For example, if surrounding environment is the environment that belongs to more noisy, then the noise sensing signal exported according to MIC microphone of controller 10 can calculate and obtain a noise level value greater than preset critical.Then after controller 10 judges that the noise level value is greater than preset critical, will select first temperature and rotation speed of the fan relation with 2 runnings of control fan.For instance, if this moment environment temperature when being 46 ℃, then controller 10 calculates with the rotation speed of the fan relation by first temperature and can obtain the rotation speed of the fan of 2100rpm, and further controls fan 2 and turn round with the speed of 2100rpm.
And in environment quietly following time, the noise sensing signal that controller 10 is exported according to MIC microphone can calculate and obtain a noise level value less than preset critical.Then after controller 10 judges that the noise level value is less than preset critical, will select second temperature and rotation speed of the fan relation with control fan 2.For instance, if this moment environment temperature when being 46 ℃ equally, controller 10 can calculate the rotation speed of the fan of 1300rpm by second temperature and rotation speed of the fan relation, and further control fan 2 and turn round with the speed of 1300rpm.
Because sound is sent by object vibration, so the ambient vibration parameter also can be considered as the reference of ambient noise level instantly.Therefore in another embodiment, first sensor 12 also can be the vibration measurement element, in order to detecting an ambient vibration parameter, and exports a vibration sensing signal to controller 10.The vibration sensing signal that controller 10 receives the vibration measurement element to export in a period of time, and go out a level of vibration value with as the environment reference value according to the vibration sensing calculated signals.
For example, first sensor 12 can be to quicken rule.When residing environment has a big volume sound source to reach more noisy degree, then quicken rule and can detect bigger environment accekeration.Simultaneously, controller 10 can calculate an environment reference value greater than preset critical according to received vibration sensing signal, therefore next can select first temperature and rotation speed of the fan relation with control fan 2.
In another embodiment, first sensor 12 can be a light sensor, in order to the ambient brightness of detection a period of time, and exports a brightness sensing signal.Controller 10 receives the brightness sensing signal of exporting from light sensor in a period of time, and goes out a luminance level value with as the environment reference value according to brightness sensing calculated signals.In actual applications, first sensor 12 can be arranged at the surface of the electronic equipment (for example, but being not limited to notebook computer) of using control system 1 of the present invention, in order to the brightness of sensing electronic equipment or the residing environment of user.
For example, when surrounding environment has lower Brightness, then represent environment of living in may have more low intensive active state and (for example, but be not limited to, in the meeting, on the aircraft ...).At this moment, first sensor 12 can detect a lower ambient brightness, and controller 10 can calculate and obtain an environment reference value less than preset critical according to the brightness sensing signal.Therefore, controller 10 will select second temperature and rotation speed of the fan relation with control fan 2, further reduces rotation speed of the fan to reduce noise.Relatively, when surrounding environment had higher Brightness, controller 10 can further increase rotation speed of the fan, to obtain preferable heat dissipation potential.
See also Fig. 2 B, Fig. 2 B is depicted as the functional-block diagram of control system of the dynamic adjustment rotation speed of the fan of second specific embodiment of the present invention.In this specific embodiment, control system 1 comprises controller 10, first sensor 12, second sensor 14 and the 3rd sensor 16.Wherein, first sensor 12 is in order to the testing environment noise, and exports a noise sensing signal.Second sensor 14 is in order to detecting the heat radiation target temperature, and exports a temperature sensing signal.The 3rd sensor 16 is in order to detecting an ambient brightness, and exports a brightness sensing signal.
In this specific embodiment, controller 10 can be a parameter according to noise sensing signal and brightness sensing signal simultaneously, calculates an environment reference value.Then controller 10 further compares environment reference value and preset critical, to select corresponding temperature and the rotation speed of the fan relation rotating speed with control fan 2.Thus, controller 10 can be done more accurate control to rotation speed of the fan according to different environmental conditions.
Please, Figure 4 shows that the method flow diagram of the dynamic adjustment rotation speed of the fan of a specific embodiment of the present invention in the lump referring to Fig. 2 A and Fig. 4.This method is applicable to the control system 1 of first specific embodiment of the present invention, and therefore following will be example with aforementioned control system 1, and this method flow process is described.
As shown in Figure 4, method of the present invention comprises the following step: at first, and first sensor 12 testing environment states, and export an environment sensing signal.10 of controllers receive and according to the environment sensing signal, obtain an environment reference value (step S20).More specifically, first sensor 12 is MIC microphone, and it detects the ambient noise of a period of time and exports a noise sensing signal.Controller 10 is then calculated according to the noise sensing signal of a period of time, to obtain a noise level value as the environment reference value.Subsequently, second sensor 14 detects the heat radiation target temperatures, and the output temperature sensing signal, and 10 of controllers produce Temperature numerical (step S21) according to detected temperature sensing signal.
Then, controller 10 compares an environment reference value and a preset critical (step S22).If the environment reference value is greater than preset critical, then controller 10 is according to one first temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan (step S23).If the environment reference value is less than preset critical, then controller 10 is according to one second temperature and rotation speed of the fan relation and Temperature numerical control rotation speed of the fan (step S24).
In another embodiment, first sensor 12 is vibration measurement elements, so the ambient vibration of 12 detection a period of times of first sensor, and exports a vibration sensing signal.10 vibration sensing signals according to a period of time of controller are calculated, to obtain a level of vibration value as the environment reference value.Then, controller 10 will compare environment reference value and preset critical, with the pattern of further decision control rotation speed of the fan.
In another embodiment, first sensor 12 is light sensors, so the ambient brightness of 12 detection a period of times of first sensor, and exports a brightness sensing signal.10 brightness sensing signals according to a period of time of controller are calculated, to obtain a luminance level value as the environment reference value.Then, controller 10 will compare environment reference value and preset critical, with the pattern of further decision control rotation speed of the fan.
In addition, in actual applications, controller 10 can be controlled the rotating speed of fan 2 to select corresponding temperature and rotation speed of the fan relation simultaneously according to noise level value and ambient brightness numerical value.In other words, controller 10 can read noise sensing signal and brightness sensing signal simultaneously, and makes the parameter that calculates the environment referential data relevant with noise level value and/or ambient brightness numerical value.
In sum, the control system of dynamic adjustment rotation speed of the fan of the present invention and method, can make the control system utilization organize temperature and rotation speed of the fan relation, and each temperature have the different temperature and the graph of relation of rotation speed of the fan with the rotation speed of the fan relation with the control rotation speed of the fan more.Under more noisy environment and when allowing the user that higher noise tolerance is arranged, control system can be selected more positive control mode, and the preferable heat ability of loosing is arranged so that fan has higher mean speed.Otherwise under environment quietly and when allowing the user that lower noise tolerance is arranged, control system can be selected conservative control mode, and quietly operation mode is provided so that fan has lower mean speed.Thus, control system can be adjusted the balanced capacity of heat dissipation potential and fan noise, and then improve the impression of user to the sound level of control system under different ambient noise grades.
Utilize the above detailed description of preferred embodiments, be to wish to know more to describe feature of the present invention and spirit, and be not to come scope of the present invention is limited with the above-mentioned preferred embodiment that is disclosed.On the contrary, its objective is that hope can contain in the scope of claim of being arranged in of various changes and tool equality institute of the present invention desire application.Therefore, the scope of the claim that the present invention applied for should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (10)
1. method of dynamically adjusting rotation speed of the fan is characterized in that said method comprises the following step:
Obtain the environment reference value;
Detect the heat radiation target temperature to obtain Temperature numerical;
More above-mentioned environment reference value and preset critical;
If above-mentioned environment reference value is greater than above-mentioned preset critical, according to first temperature and rotation speed of the fan relation and said temperature numerical control said fans rotating speed; And
If above-mentioned environment reference value is less than above-mentioned preset critical, according to second temperature and rotation speed of the fan relation and said temperature numerical control said fans rotating speed.
2. method according to claim 1 is characterized in that, the above-mentioned step that obtains the environment reference value further comprises the ambient noise that detects a period of time, and obtains the noise level value with as above-mentioned environment reference value.
3. method according to claim 1 is characterized in that, the above-mentioned step that obtains the environment reference value further comprises the ambient vibration that detects a period of time, and obtains the level of vibration value with as above-mentioned environment reference value.
4. method according to claim 1 is characterized in that, the above-mentioned step that obtains the environment reference value further comprises the ambient brightness that detects a period of time, and obtains the luminance level value with as above-mentioned environment reference value.
5. method according to claim 1, it is characterized in that, according to said temperature numerical value, the numerical value of the said fans rotating speed that calculates by above-mentioned first temperature and rotation speed of the fan relation is more than or equal to the numerical value of the said fans rotating speed that calculates by above-mentioned second temperature and rotation speed of the fan relation.
6. a control system of dynamically adjusting rotation speed of the fan is characterized in that, comprises:
First sensor, in order to the testing environment state, and the output environment sensing signal;
Second sensor, in order to detection heat radiation target temperature, and the output temperature sensing signal; And
Controller, be electrically connected said fans, above-mentioned first sensor and above-mentioned second sensor, and above-mentioned controller is preset with preset critical, first temperature and rotation speed of the fan relation and second temperature and rotation speed of the fan relation, above-mentioned controller obtains the environment reference value according to above-mentioned environment sensing signal, above-mentioned controller obtains Temperature numerical according to the said temperature sensing signal, and more above-mentioned environment reference value of above-mentioned controller and above-mentioned preset critical, if above-mentioned environment reference value is greater than above-mentioned preset critical, then above-mentioned controller is according to above-mentioned first temperature and rotation speed of the fan relation and said temperature numerical control said fans rotating speed, if above-mentioned environment reference value is less than above-mentioned preset critical, then above-mentioned controller is according to above-mentioned second temperature and rotation speed of the fan relation and said temperature numerical control said fans rotating speed.
7. control system according to claim 6, it is characterized in that above-mentioned first sensor is a MIC microphone, in order to detect the ambient noise of a period of time, and the output noise sensing signal, above-mentioned controller is obtained the noise level value with as above-mentioned environment reference value according to above-mentioned noise sensing signal.
8. control system according to claim 6, it is characterized in that, above-mentioned first sensor is the vibration measurement element, in order to detect the ambient vibration parameter of a period of time, and output vibration sensing signal, above-mentioned controller is obtained the level of vibration value with as above-mentioned environment reference value according to above-mentioned vibration sensing signal.
9. control system according to claim 6, it is characterized in that above-mentioned first sensor is a light sensor, in order to detect the ambient brightness of a period of time, and output brightness sensing signal, above-mentioned controller is obtained the luminance level value with as above-mentioned environment reference value according to above-mentioned brightness sensing signal.
10. control system according to claim 6, it is characterized in that, according to said temperature numerical value, the numerical value of the said fans rotating speed that calculates by above-mentioned first temperature and rotation speed of the fan relation is more than or equal to the numerical value of the said fans rotating speed that calculates by above-mentioned second temperature and rotation speed of the fan relation.
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| CN110345097A (en) * | 2019-06-14 | 2019-10-18 | 南京晶达微电子科技有限公司 | A kind of control method for fan, device, equipment and computer storage medium |
| CN110848164A (en) * | 2019-09-29 | 2020-02-28 | 深圳市火乐科技发展有限公司 | Rotating speed adjusting method and related product thereof |
| WO2022083369A1 (en) * | 2020-10-19 | 2022-04-28 | Dynascan Technology Corp. | Display apparatus and method for controlling the same |
| US11630495B2 (en) | 2020-10-19 | 2023-04-18 | Dynascan Technology Corp. | Display apparatus and method for controlling the same |
| CN113094231A (en) * | 2021-04-06 | 2021-07-09 | 河南工业和信息化职业学院 | Computer fan control method, system, controller and storage medium |
| CN113094231B (en) * | 2021-04-06 | 2022-11-25 | 河南工业和信息化职业学院 | Computer fan control method, system, controller and storage medium |
| CN113133286A (en) * | 2021-04-19 | 2021-07-16 | 西安易朴通讯技术有限公司 | Heat dissipation control method, device, equipment and storage medium |
| WO2023097768A1 (en) * | 2021-11-30 | 2023-06-08 | 歌尔股份有限公司 | Electronic device control method and apparatus, and electronic device and readable storage medium |
| CN114801163A (en) * | 2022-05-05 | 2022-07-29 | 昆山优联模具科技有限公司 | 3D printing mold cooling method and system |
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Application publication date: 20110622 |