TW201606202A - Control system for sound volume of a fan and the autocontrol method thereof - Google Patents

Abstract

A control system for sound volume of a fan and the autocontrol method thereof are provided. A control system for sound volume of a fan includes but not limited to a first detecting unit, a second detecting unit, a signal processing unit, and a control unit. The first detecting unit inside a computer detects the sound in the computer to acquire a device- sound signal. The second detecting unit outside the computer detects the sound outside the computer to acquire an environmental sound signal. The signal processing unit analyzes the device-sound signal and the environmental sound signal, and converts the analyzed signal to a voltage signal. The control unit determines whether the voltage signal is higher than a predetermined voltage value or not, and if yes, the control unit controls the rotation of a van of the computer.

Description

Fan volume control system and fan volume automatic control method thereof

The present invention relates to a computer volume control system, and more particularly to a fan volume control system that can be used in a computer and a fan volume automatic control method using the same.

With the ever-changing technology of computers, electronic devices such as Central Processing Units (CPUs), chipsets, and display cards have excellent performance, even far exceeding the daily needs of most users.

When a user uses a computer to perform a more complicated program, it is easy to cause an increase in the operating temperature of the electronic device. In order to maintain these electronic devices at an appropriate operating temperature, electronic devices, such as a CPU and a display card, are provided with a fan, which is used as a heat sink for the electronic device by the airflow generated by the fan. In addition, the addition of an additional system fan to the computer to expel the hot air inside the computer case is also a common technical means.

In general, the internal fan of the computer is as large as the following:

1. Power supply internal fan, purely controlled by the power supply, no The method is controlled by the signal or software of the motherboard, that is, the noise of the fan is uncontrollable.

2. Central processing unit (CPU) fan, controlled by the control signal of the motherboard, usually as the CPU temperature rises, the central processing unit (CPU) fan speed also increases.

3. The display card fan is controlled by the control signal on the display card. Generally, as the temperature of the graphics processing unit (GPU) rises, the display card fan speed also increases.

4. The system fan is controlled by the control signal of the motherboard. Generally, as the temperature of the system inside the casing rises, the system fan speed also increases. In addition, some motherboards can also be designed to increase the system fan speed as the CPU temperature rises.

However, the operating volume of the above fan is the main source of noise for the computer. In general, electronic devices such as a central processing unit, a motherboard, or a display card are designed such that the rotational speed of the fan increases with the operating temperature of an electronic device such as a CPU, a graphics processing unit (GPU), or a motherboard. improve. The noise generated by the fan is usually proportional to the speed of the speed.

In other words, the design concept of the conventional motherboard and the display card to the fan control is to protect the CPU, the graphic processing unit (GPU) or the motherboard from the electronic device without overheating, without worrying about the fan. Excessive volume causes noise problems caused by the user.

Therefore, how to reduce the noise generated by the fan volume inside the computer is one of the problems that the industry is trying to solve.

In view of the above problems, the present invention provides a fan volume control system and an automatic fan volume control method using the same, which can automatically detect sounds inside and outside the computer. The amount, and automatically control the fan speed in the computer, so that the fan volume is maintained within a range of the volume decibel value preset by the user, solving the problem that the fan volume forms noise.

Based on the above, the present invention provides a fan volume control system, which is applicable to at least one computer, and includes: at least one first volume detecting unit, each of the first volume detecting units can be disposed in the corresponding computer, Detecting at least one internal volume of the computer to obtain at least one device volume signal; at least one second volume detecting unit disposed outside the computer for detecting at least one external volume of the computer to obtain at least one environmental volume signal a signal processing unit electrically connected to the first volume detecting unit and the second volume detecting unit, wherein the signal processing unit is configured to analyze the device volume signal and the ambient volume signal, and filter the ambient volume signal in the device volume signal. Obtaining a voltage signal; a control unit electrically connecting the signal processing unit and at least one fan in the computer; the control unit has a determining module for determining whether the voltage signal is greater than a predetermined voltage value, and if so, The control unit is used to control the speed of the fan to reduce the volume of the fan.

In at least one embodiment of the invention, the control unit is electrically connected to at least one electronic device within the computer. The electronic device is electrically connected to the fan, and the control unit is electrically connected to the fan indirectly. In addition, the control unit indirectly controls the rotational speed of the fan.

In at least one embodiment of the invention, the control unit is directly electrically coupled to the fan within the computer. The determining module of the control unit is configured to determine whether the voltage signal is greater than a predetermined voltage value, and if so, the control unit directly controls the speed of the fan to reduce the volume of the fan.

In at least one embodiment of the present invention, the signal processing unit has a signal analysis unit and a signal conversion unit.

Moreover, for the purpose of the present invention, the present invention provides an automatic fan volume control The method is implemented by a fan volume control system, comprising the steps of: detecting a volume of at least one computer through a first volume detecting unit of the fan volume control system, and obtaining at least one device volume signal; and passing the fan volume control system a second volume detecting unit detects at least one external volume of the computer and obtains at least one ambient volume signal; and filters a device volume signal through a signal processing unit of the fan volume control system to analyze the device volume signal and the environmental volume signal The ambient volume signal is obtained to obtain at least one voltage signal; first, a determining module of a control unit of the fan volume control system determines whether a voltage signal of the at least one voltage signal is greater than a predetermined voltage in the control unit a value; when the determining module determines that the voltage signal is greater than the preset voltage value, controlling at least one fan in the computer by the control unit to reduce the volume of the at least one fan; and when the determining module determines that the voltage signal is not greater than the pre- When the voltage value is set, it is further repeated to enter the preceding through fan sound The control unit determining module determining a control system of the at least one voltage signal of a voltage signal is greater than a preset voltage step within the control unit.

In at least one embodiment of the present invention, the step of controlling the at least one fan in the computer through the control unit further includes: controlling, by the control unit, operation of the at least one electronic device in the computer to indirectly control the rotation speed of the fan and volume.

In at least one embodiment of the present invention, the step of controlling the operation of the at least one electronic device in the computer through the control unit is to perform a frequency reduction, a speed reduction, and a start thermal throttle mechanism on the control electronic device. Or a combination of frequency reduction, speed reduction, and initiation of thermal throttling mechanisms.

In at least one embodiment of the present invention, the step of controlling the at least one fan in the computer through the control unit further comprises: directly controlling a rotation speed of the fan or another fan through the control unit.

In at least one embodiment of the invention, the speed of the fan or another fan is controlled by a predetermined fan speed value.

In at least one embodiment of the present invention, the transmission control unit controls the operation of the at least one electronic device to indirectly control the rotation speed and volume of the fan, and the transmission control unit directly controls the rotation speed of the fan or another fan. The steps are performed synchronously.

In at least one embodiment of the present invention, the fan volume automatic control method further includes: after the step of controlling the operation of the electronic device in the computer by the transmission control unit to indirectly control the rotation speed and the volume of the fan, The determining module determines whether the newly generated voltage signal is greater than the preset voltage value in the control unit; when the determining module determines that the newly generated voltage signal is greater than the preset voltage value, the control unit directly controls the rotation speed of the at least one fan to And decreasing the volume of the at least one fan; and determining, by the determining module, that the newly generated voltage signal is not greater than the preset voltage value, further determining, by the determining module of the control unit that first passes through the fan volume control system, determining The step of whether at least one of the voltage signals is greater than a preset voltage value in the control unit.

In at least one embodiment of the present invention, the method for automatically controlling the volume of the fan further includes: stopping, by the control unit, a step of controlling the operation of the electronic device in the computer, the splicing or synchronizing with the transmitting control unit to directly control the at least one fan The steps of the speed.

In at least one embodiment of the present invention, the fan volume automatic control method further includes: stopping, by the control unit, controlling the operation of the electronic device in the computer host, and subsequently determining, by the determining module of the re-transmission control unit, the newly generated voltage signal. Whether it is greater than the preset voltage value step in the control unit, and when the determining module determines that the newly generated voltage signal is not greater than the preset voltage value, first executing the transmitting control unit to stop controlling the operation of the electronic device in the computer host And the step of determining, by the determining module of the preceding transmission control unit, whether the voltage signal in the at least one is greater than a preset voltage value in the control unit.

Through the volume control system of the present invention and the automatic control of the fan volume for the volume control system, the user only needs to set a volume decibel value in advance, and the volume decibel value is processed by the computer to form a preset voltage value. Thereby, the volume control system can automatically detect the volume inside and outside the computer and directly or indirectly control the speed of the fan in the computer, so that the fan volume is controlled within the volume decibel value preset by the user.

100‧‧‧Fan volume control system

10‧‧‧First volume detection unit

12‧‧‧Second volume detection unit

14‧‧‧Signal Processing Unit

140‧‧‧Signal Analysis Unit

142‧‧‧Signal conversion unit

16‧‧‧Control unit

160‧‧‧Judgement module

200‧‧‧ computer

20‧‧‧Fan

21‧‧‧Electronic devices

22‧‧‧Fan

a _n ‧‧‧ computer internal volume

b _n ‧‧‧ computer external volume

a _n '‧‧‧ device volume signal

b _n '‧‧‧Environmental volume signal

c _n ‧‧‧voltage signal

d‧‧‧Preset voltage value

e‧‧‧Preset fan speed value

FIG. 1 is a block diagram showing a fan volume control system according to an embodiment of the present invention.

2 is a flow chart of a method for automatically controlling a fan volume according to a first embodiment of the present invention.

Fig. 3 is a detailed flow chart showing the method of automatically controlling the fan volume as in the embodiment shown in Fig. 2.

4 is a flow chart of a method for automatically controlling a fan volume according to a second embodiment of the present invention.

FIG. 5 is a flow chart of a method for automatically controlling a fan volume according to a third embodiment of the present invention.

FIG. 6 is a flow chart of a method for automatically controlling the volume of a fan according to a fourth embodiment of the present invention.

Fig. 7A is a graph showing the relationship between the temperature and the basic value of the number of revolutions of the fan.

Figure 7B is a graph showing the relationship between a temperature and a preset fan speed value.

In order to more clearly understand the concept of the present invention, several embodiments of the present invention are described in detail below with reference to the accompanying drawings. The same symbols represent components or devices that have the same or similar functions. The "coupled", "connected", and "electrically connected" described in the present invention may be "indirect or direct electrical connection". In addition, the shapes, the dimensions, the proportions, and the like of the elements shown in the drawings are merely illustrative and are intended to be used by those of ordinary skill in the art to understand the invention and not to limit the scope of the invention. In addition, any of the embodiments described in the following description, even if a plurality of technical features are simultaneously disclosed, does not mean that all the technical features in any of the embodiments must be simultaneously implemented by the inventors. In other words, as long as the implementation possibilities are not affected, those skilled in the art can selectively implement some, but not all, of the technical features according to the disclosure of the present invention and according to the needs or design concepts, thereby increasing the implementation of the present invention. Time elasticity.

Please refer to FIG. 1 first, which is a block diagram of a fan volume control system according to an embodiment of the present invention. The fan volume control system 100 can be adapted to a computer 200. The fan volume control system 100 has at least one first volume detecting unit 10, at least one second volume detecting unit 12, a signal processing unit 14, and a control unit 16.

A first detection unit volume, for example, a microphone 10, may be provided in one or more computers 200, and a computer for the continuous detection of at least a _n internal volume, and the computer according to a _n internal volume means the volume to obtain at least a Signal a _n '. It is noted that the symbol n is a positive number larger than 0, this means before and after the detected signal, so that the front and rear views of the detection signal to generate segments or, for example, previous to the detected computer called a _n internal volume The internal volume of the computer a ₁ , the subsequent detected internal volume of the computer a _n is called the internal volume of the computer a ₂ , and the corresponding device volume signal a _n ' is called the device volume signal a ₁ 'and device volume signal a ₂ ', and so on.

The second volume detecting unit 20 is, for example, a microphone disposed outside the computer 200 and configured to continuously detect at least one external computer volume b _n and obtain at least one environmental volume signal b _n ' according to the external volume b _{n of the} computer. Similarly, the external volume b _n detected by the previous time is called the external volume b ₁ of the computer, and the external volume b _{n of} the subsequent detected computer is called the external volume b _{2 of the} computer, and the corresponding generated The ambient volume signal b _n 'is called the ambient volume signal b ₁ 'and the ambient volume signal b ₂ ', and so on.

The signal processing unit 14 is electrically connected to the first volume detecting unit 10 and the second volume detecting unit 12. Signal processing unit 14 for the continuous analysis of the volume signal and the comparison means a _n 'environment and the volume signal b _n', may be based, for example, means the volume signal a _n 'environment of the volume signal b _n' was filtered off, to yield (obtained) A voltage signal c _n . Similarly, the previously generated voltage signal c _{n is} called voltage signal c ₁ , and the subsequent newly generated voltage signal c _{n is} called voltage signal c ₂ . Another newly generated voltage signal c _n is called voltage signal c ₃ , and so on.

In an embodiment of the invention, the signal processing unit 14 has a signal analysis unit 140 and a signal conversion unit 142. The signal conversion unit 142 is electrically connected to the signal analysis unit 140. The signal analysis unit 140 is, for example, a microprocessor or an analysis device assembled with one or more electronic components including a differential, a subtractor, an amplifier, a rectifier, and a filter. The signal conversion unit 142 is, for example, a commercially available signal converter that converts the volume level signal into a DC voltage level signal, referred to herein as a voltage signal c _n . In this embodiment, the signal conversion unit 142 converts the pure computer internal volume level signal a _n '-b _n ' obtained by filtering the device volume signal a _n ' from the environmental volume signal b _n ' into a voltage signal c _n .

The control unit 16 is, for example, a microprocessor (MCU) or a control chip set (PCH) electrically connected to the signal processing unit 14 and at least one fan 20 or fan 22 in the computer 200. In an embodiment of the invention, the control unit 16 can be electrically connected to the fan 20 and the fan 22 in the computer 200 (shown in a dashed box).

More specifically, the control unit 16 is electrically connected to at least one electronic device 21 in the computer 200. The figure only indicates one group, but may also connect multiple groups of electronic devices. The electronic device 21 is, for example, a central processing unit (CPU), a graphics processing unit (GPU), or a motherboard. The electronic device 21 is electrically connected to the corresponding fan 22. For example, the electronic device 21 is a central processing unit (CPU), and the fan 22 is a CPU fan, and is controlled by the control signal of the electronic device 21. Thereby, the control unit 16 is electrically connected to the fan 22 indirectly. The control unit 16 also controls the operation of the electronic device 21 to indirectly control the rotational speed of the fan 22. Moreover, the control unit 16 can also be directly electrically connected to at least one fan 20 in the computer 200. The figure only indicates one set, but a plurality of sets of fans 20 can also be configured. Fan 20 is, for example, a system fan, a central processing unit fan, or a display card fan. Thereby, the control unit 16 can directly electrically connect the fan 20 and control the rotational speed of the fan 20.

The fan volume control system 100 of the present invention is not limited to the above embodiment. In other embodiments, the control unit 16 may also directly connect the fan 20 directly. In another embodiment, the control unit 16 is only electrically connected to the fan 22 indirectly.

The control unit 16 has a determination module 160. The determining module 160 is configured to determine whether the voltage signal c _n is greater than a predetermined voltage value d. The preset voltage value d is that the user sets the volume decibel value through the computer 200 in advance, and then the volume decibel value is processed by the computer 200 to generate the corresponding preset voltage value d.

If the determining unit 160 determines that the voltage signal c _n is greater than a predetermined voltage value d, that is, the volume generated inside the computer 200 is greater than a preset volume decibel value, the control unit 16 is configured to transmit a control interface such as a computer firmware, The speed of the fan 20 or the fan 22 is controlled by a soft body or a hard body to reduce the volume of the fan 20 or the fan 22. The manner of controlling the rotational speed of the fan 22 or the fan 20 can be, for example, directly turning off the fan 20 or the fan 22, or operating safely on the electronic device 21, for example, according to the preset fan rotational speed value e as shown in FIG. 7B and FIG. In this case, the speed of the fan 20 or the fan 22 is controlled or reduced.

Although the fan volume control system 100 is disposed outside the computer 200 in this figure, the drawings are for distinguishing the components of the fan volume control system 100 of the present invention from those of the conventional computer 200, and do not indicate the specific configuration thereof. It must be located outside the computer 200 such as the mainframe of the computer. For example, in various embodiments of the present invention, the fan volume control system 100 may be optionally disposed in the host chassis of the computer 200, or may be disposed outside the host chassis of the computer 200 or partially disposed in the host chassis of the computer 200. For example, a plurality of first volume detecting units 10 are disposed in a fan volume control system 100, and each of the volume detecting units 10 can be individually connected to a corresponding computer 200 chassis to detect And obtain the internal volume a _n of the computer of each computer 200 and the device volume signal a _n '. In this manner, the fan volume control system 100 can detect and control the rotational speed of the fan 20 or the fan 22 of the plurality of computers 200 at any time.

Based on the above fan volume control system and its possible variations. In the following, several embodiments of the automatic fan volume control method of the present invention are provided, which can be matched with the control interface of the computer 200, such as a software body, a firmware or a computer hardware, to load the fan volume control system 100 or its possible variation. kind.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 simultaneously. FIG. 2 is a flowchart of a method for automatically controlling the fan volume according to the first embodiment of the present invention. When the computer 200 gets an instruction to turn on, the wind Fan 20 and/or fan 22 will operate according to the basic setpoint of fan speed as shown in Figure 7A. At this time, if the computer 200 obtains a command to reduce the noise function, the automatic fan volume control method of the present invention can be automatically performed.

First, in step S10, the device volume detecting step, the first volume detecting unit 10 of the fan volume control system 100 continuously detects at least one internal computer internal volume a _{n of the} computer 200, such as a computer internal volume a ₁ , a computer The internal volume a ₂ continues to generate (obtain) at least one device volume signal a _n ', such as the device volume signal a ₁ ', the device volume signal a ₂ '.

Then, for example, the ambient volume detecting step S12 (in other embodiments, it may be performed in advance in step S10 or in synchronization with step S10). The second volume detecting unit 12 of the fan volume control system 100 continuously detects at least one computer external volume b _n outside the computer 200, such as the computer external volume b ₁ , the computer external volume b ₂ , and continuously generates (acquires) an ambient volume. The signal b _n ', for example, the ambient volume signal b ₁ , the ambient volume signal b ₂ .

Then, as in the analysis conversion step S14. The signal analysis unit 140 of the signal processing unit 14 of the fan volume control system 100 will continuously analyze and compare the device volume signal a _n 'and the ambient volume signal b _n ', and filter out the ambient volume signal b _n in the device volume signal a _n '', to get the pure computer internal volume size signal a _n '-b _n '. Then, the signal conversion unit 142 of the signal processing unit 14 converts the pure computer internal volume level signal a _n '-b _n ' after the device volume signal a _n 'filters the ambient volume signal b _n ' into (acquires) at least one voltage. Signal c _n . In the present embodiment, the signal analysis unit 140 of the signal processing unit 14 performs the analysis of the volume signal a ₁ ' and the ambient volume signal b ₁ ', and further converts the signal signal by the signal conversion unit 142 of the signal processing unit 14 to obtain a voltage signal c. ₁ .

Next, as in the first decision step S16a. The determining module 160 of the control unit 16 of the fan volume control system 100 first determines whether a voltage signal c _{1 of} the at least one voltage signal c _n is greater than a predetermined voltage value d in the control unit 160. The preset voltage value d is first received by the computer to receive an external signal value, and then the external signal value is processed by the computer, thereby generating a preset voltage value d. The external signal value is a volume decibel value that the user inputs through the computer in advance.

If the first determination step S16a determination is yes, in other words, when the determining module 160 determines the voltage signal c ₁ is greater than the predetermined voltage value d, the control proceeds to step S18, the control unit 16 via the control interface computer 200, such as software, At least one fan 20 and/or fan 22 within the computer 200 is directly or indirectly controlled by means of firmware or hardware to reduce the volume of the fans 20 and/or 22.

More specifically, referring to FIG. 3, in an embodiment, the control step S18 is to cooperate with the fan volume control system 100 of the first embodiment, and may include a fan indirect control step S18a and a fan direct control step S18b.

The fan indirect control step S18a is that the control unit 16 controls the operation of at least one electronic device 21 in the computer 200 to indirectly control the rotational speed of the fan 22. The control unit 16 controls the manner in which the at least one electronic device 21 in the computer 200 operates, for example, but not limited to, one of frequency reduction, one speed reduction, and one thermal-throttle mechanism for the electronic device 21. Or a combination thereof for cooling the electronic device 21, and the corresponding fan 22 also indirectly reduces the rotational speed to achieve an indirect fan volume control effect.

The fan direct control step S18b is that the control unit 16 directly controls the rotational speed of the fan 20, for example, directly controlling the system fan to stop rotating or lowering the rotational speed. In another embodiment, the rotational speed of the fan 22 can also be directly controlled. The manner of controlling the rotational speed of the fan 20 or the fan 22, for example, but not limited to, is controlled according to a preset fan rotational speed value e corresponding to FIG. 7B. In different embodiments, the fan indirect control step S18a and the fan direct control step S18b may be performed synchronously, and may be performed before and after other embodiments. In addition, in other embodiments, only the fan indirect control step S18a may be performed. And the fan directly controls the control step of one of the steps S18b.

The first determination step S16a is performed, and if the first determination step S16a is negative. In other words, when the determining module 160 determines that the voltage signal c _{1 is} not greater than the preset voltage value d, the first repeating step is entered. The first repeating step is to re-enter the analysis conversion step S14, thereby further repeating the steps of the first determining step S16a. Therefore, it is determined whether a voltage signal c ₂ newly generated in the at least one voltage signal c _n generated in steps S10, S12, and S14 is greater than a preset voltage value d, so as to achieve continuous detection and control.

Above, a user need only preset volume decibel value through computer 200, followed by another user 100, internal volume continue to detect computer PC 200 through a _n automatic volume control method for a fan and a fan control system according to the present invention, the volume, based on computer The external volume b _n and further controls the fan 20 or fan 22 speed. Thereby, the pure computer internal volume level signal b _n '-a _n ' in the computer 200 can be maintained within the preset voltage value d (which corresponds to the preset volume decibel value), and the volume of the internal and external computers can be detected. And control the fan speed to reduce the fan volume.

The present invention is not limited to the above embodiment. Please refer to FIG. 1 and FIG. 4 again in synchronization. FIG. 4 is a flowchart of a method for automatically controlling the fan volume according to the second embodiment of the present invention. The same step symbols S10, S12, S14, S16a, S18a, and S18b of the second embodiment are the same as those of the fan volume automatic control method of the first embodiment, and will not be described again. The following only describes the differences. In the fan volume automatic control method of the second embodiment, when the first determining step S16a is performed, if the determining module 160 determines that the voltage signal c _{1 is} greater than the preset voltage value d, performing the fan indirect in the controlling step S18 Control step S18a, in turn, controls the operation of the electronic device 21 to indirectly control the rotational speed and/or the operating volume of the fan 22. If the determining module 160 determines that the voltage signal c _{1 is} not greater than the preset voltage value d, then the first repeating step is entered, and then the first determining step S16a is further repeated to continuously detect the volume inside and outside the computer and control the fan 20 For example, the fan volume automatic control method of the first embodiment is not described here.

The difference is that after the fan indirect control step S18a is performed, the second decision step S16b is entered. More specifically, after performing the fan indirect control step S18a, such as downsizing or slowing down the electronic device 21, the device volume detecting step S10 and the ambient volume detecting step S12 can continuously detect and generate a device volume signal a ₃ ' And an environmental volume signal b ₃ ', and continuously performing the analysis conversion step S14 to newly generate a voltage signal c ₃ . Therefore, the second determination step S16b is performed, that is, the determination module 160 of the control unit 16 again determines whether the newly generated voltage signal c ₃ is greater than the preset voltage value d in the control unit 16 .

When the determining module 160 determines that the newly generated voltage signal c _{3 is} still greater than the preset voltage value d in the control unit 16, it indicates that the internal volume of the pure computer in the computer 200 is still greater than the volume decibel value preset by the user. In other words, it means that the source of the noise volume in the computer 200 is not able to control the elimination or reduction by controlling the operation of the electronic device 21. Therefore, the control unit 16 directly controls the rotation speed of the fan 20 such as the system fan, the display card fan or the host card fan to directly reduce the volume of the fan 20, as in the fan direct control step S18b in the control step S18. Of course, in another embodiment, the rotational speed of the fan 22 can also be directly controlled.

In the second determining step S16b, if the newly generated voltage signal c _{3 is} not greater than the preset voltage value d in the control unit 16, it indicates that the internal volume of the computer 200 is less than the volume decibel preset by the user. value. In other words, the source of noise in the computer has been removed by control. Therefore, the second repeating step is entered. The second repeating step is to re-enter the analysis conversion step S14, and further to the first determination step S16a. Thereby, the effect of continuously detecting the volume inside and outside the computer 200 and controlling the fan 20 or the fan 22 is achieved.

Please refer to FIG. 1 and FIG. 5 continuously. FIG. 5 is a flowchart of a method for automatically controlling the volume of a fan according to a third embodiment of the present invention. The difference between the third embodiment and the fan volume automatic control method of the second embodiment is that a stop step S22 is further included. The stop step S22 is synchronized with the fan direct control step S18b. In still another embodiment of the present invention, the stopping step S22 may be continued after the fan direct control step S18b. The stopping step S22 is that the control unit 16 stops controlling the operation of the electronic device 21 in the computer 200, that is, stops the fan indirect control step S18a. For example, the control unit 16 stops or turns off the fan indirect control step S18a for down-converting, decelerating, etc. the electronic device 21. The effect of stopping the step S22 is that since the internal volume of the pure computer is still greater than the volume decibel value after the fan indirect control step S18a is performed, such as downsizing or slowing down, the source of the noise cannot be controlled by the operation of the control electronic device 21. improve. At this time, in order to prevent the electronic device 21 from being too poor in performance, the control unit 16 stops controlling the operation of the electronic device 21 (fan indirect control step S18a). Thereby, it is possible to achieve a balance between reducing the rotational speed and volume of the fan 20, the fan 22, and controlling the operation of the electronic device 21. The source of the controllable fan noise volume is found to be controlled without disturbing the operation of the electronic device 21.

Please refer to FIG. 1 and FIG. 6 continuously. FIG. 6 is a flowchart of a method for automatically controlling the volume of a fan according to a fourth embodiment of the present invention. The fan volume automatic control method of the fourth embodiment differs from the third embodiment in that the fourth embodiment further includes a stopping step S24, which is subsequent to the second determining step S16b. More specifically, when the control unit 16 determines that the voltage signal c _{3 is} not greater than the preset voltage value d, the second repeating step is performed after the stopping step S24 is performed. The second repeating step refers to re-entering the analysis conversion step S14, and further repeating the first determination step S16a. The stopping step S24 is that the control unit 160 stops or turns off the operation of the electronic device 21 in the control computer 200 (i.e., stops the fan indirect control step S18a). For example, the control unit 160 stops or turns off the fan indirect control step S18a for down-converting or slowing down the computer device 21. The effect of stopping step S24 is that when the control unit 16 determines that the voltage signal c _{3 is} not greater than the preset voltage value d, it indicates that the internal volume of the pure computer in the computer 200 has fallen below the preset volume decibel value. In other words, the internal volume of a pure computer has been effectively reduced to an intolerable range. At this time, in order to prevent the performance of the electronic device 21 from being too poor, it is no longer necessary to perform the fan indirect control step S18a such as down-conversion or down-speed. Therefore, before the second repeating step is performed, the stopping step S24 is performed first, and the fan indirect control step S18a of controlling the down-conversion or the deceleration of the electronic device 21 is stopped. Subsequently, a second repeating step is performed to further enter the first determining step S16a.

After entering the first determining step S16a again, if the determining module 160 of the control unit 16 determines that another newly generated voltage signal c ₄ in the voltage signal c _n is higher than the preset voltage value d again, it will start again. The fan indirectly controls step S18a and subsequent steps. Thereby, the effect of the balance control is achieved between the effective operation of the electronic device 21 and the reduction of the rotational speed and volume of the fan 20 or the fan 22.

The above is only a preferred embodiment of the present invention. The scope of the invention is not limited to the above embodiments. Equivalent modifications or variations made by persons skilled in the art in light of the teachings of the present invention are intended to be included within the scope of the following claims.

100‧‧‧Fan volume control system

10‧‧‧First volume detection unit

12‧‧‧Second volume detection unit

14‧‧‧Signal Processing Unit

140‧‧‧Signal Analysis Unit

142‧‧‧Signal conversion unit

16‧‧‧Control unit

160‧‧‧Judgement module

200‧‧‧ computer

20‧‧‧Fan

21‧‧‧Electronic devices

22‧‧‧Fan

a _n ‧‧‧ computer internal volume

b _n ‧‧‧ computer external volume

a _n '‧‧‧ device volume signal

b _n '‧‧‧Environmental volume signal

c _n ‧‧‧voltage signal

d‧‧‧Preset voltage value

e‧‧‧Preset fan speed value

Claims (13)

A fan volume control system is applicable to at least one computer, including: at least one first volume detecting unit, each first volume detecting unit being disposed in the corresponding computer for detecting at least one computer internal The volume is obtained to obtain at least one device volume signal; at least one second volume detecting unit is disposed outside the computer for detecting at least one external volume of the computer to obtain at least one environmental volume signal; a signal processing unit, The first volume detecting unit and the second volume detecting unit are connected to the signal processing unit for analyzing the volume signal of the device and the ambient volume signal, and filtering the ambient volume signal in the volume signal of the device. Obtaining a voltage signal; a control unit electrically connecting the signal processing unit and at least one fan in the computer, the control unit having a determining module for determining whether the voltage signal is greater than a predetermined voltage value, If yes, the control unit is configured to control the rotation speed of the fan to reduce the volume of the fan. The fan volume control system of claim 1, wherein the control unit is electrically connected to at least one electronic device in the computer, the electronic device is electrically connected to the fan, and the control unit is electrically connected indirectly. The fan and indirectly controls the speed of the fan. The fan volume control system of claim 1, wherein the control unit is directly electrically connected to the fan in the computer, and the determining module of the control unit is configured to determine whether the voltage signal is greater than a predetermined voltage. The value, if so, the control unit directly controls the speed of the fan to cause the volume of the fan to be lowered. The fan volume control system of claim 1, wherein the signal processing unit has a signal analysis unit and a signal conversion unit. An automatic fan volume control method for a fan volume control system, including The following steps: detecting, by a first volume detecting unit of the fan volume control system, at least one internal volume of the computer, and obtaining at least one device volume signal; and detecting, by the second volume detecting unit of the fan volume control system, at least a computer external volume and obtaining at least one environmental volume signal; analyzing a volume signal of the device and the ambient volume signal through a signal processing unit of the fan volume control system, filtering the ambient volume signal in the volume signal of the device to obtain At least one voltage signal; first determining, by a determining module of a control unit of the fan volume control system, whether a voltage signal in the at least one voltage signal is greater than a predetermined voltage value in the control unit; When the voltage signal is greater than the preset voltage value, the control unit controls at least one fan in the computer to reduce the volume of the at least one fan; and when the determining module determines that the voltage signal is not greater than the preset At the voltage value, further entering the control that passes through the fan volume control system The determining module determines the at least one element of the voltage signal a voltage signal in step whether the predetermined voltage value is greater than in the control unit. The method of automatically controlling the fan volume according to claim 5, wherein the controlling the at least one fan in the computer through the control unit comprises: controlling, by the control unit, operation of at least one electronic device in the computer To indirectly control the speed and volume of the fan. The automatic fan volume control method of claim 6, wherein the step of controlling the operation of the at least one electronic device in the computer through the control unit is to perform the electronic device A combination of frequency reduction, deceleration, a thermal throttling mechanism, or frequency reduction, deceleration, and initiation of a thermal throttling mechanism. The method of automatically controlling the fan volume according to claim 6, wherein the controlling the at least one fan in the computer through the control unit comprises: directly controlling the rotation speed of the fan or another fan through the control unit. The automatic fan volume control method of claim 8, wherein the speed of the fan or the other fan is controlled according to a preset fan speed value. The method of automatically controlling the fan volume according to claim 8, wherein the step of controlling the operation of the at least one electronic device through the control unit to indirectly control the rotation speed and volume of the fan and the transmitting the control unit The step of directly controlling the rotational speed of the fan or the other fan is performed synchronously. The method of automatically controlling the fan volume according to claim 6, wherein after the step of controlling the operation of the electronic device in the computer through the control unit to indirectly control the rotation speed and volume of the fan, the method further includes: And determining, by the determining module of the control unit, whether the newly generated voltage signal is greater than the preset voltage value in the control unit; and when the determining module determines that the newly generated voltage signal is greater than the preset voltage value, The control unit directly controls the rotation speed of the at least one fan to reduce the volume of the at least one fan; and when the determination module determines that the newly generated voltage signal is not greater than the preset voltage value, further enters the The determining module of the control unit of the fan volume control system determines whether a voltage signal in the at least one voltage signal is greater than the preset voltage value in the control unit. The method for automatically controlling the fan volume according to Item 11 of the present invention, further comprising: stopping, by the control unit, a step of controlling an operation of the electronic device in the computer, the splicing or synchronizing with the control unit directly controlling the The step of at least one fan speed. The method for automatically controlling the fan volume according to claim 11, further comprising: stopping, by the control unit, the step of controlling the operation of the electronic device in the computer host, and continuing to the determining module that is again transmitted through the control unit After the step of determining whether the newly generated voltage signal is greater than the preset voltage value in the control unit, and when the determining module determines that the newly generated voltage signal is not greater than the preset voltage value, performing the transmitting The control unit stops controlling the operation of the electronic device in the computer host, and further repeats the determining module of the control unit that first passes through the fan volume control system to determine a voltage signal in the at least one voltage signal Whether it is greater than the step of the preset voltage value in the control unit.