CN101281398B - Method and system for monitoring rotary speed signal of multiple fans - Google Patents
Method and system for monitoring rotary speed signal of multiple fans Download PDFInfo
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- CN101281398B CN101281398B CN200710039171A CN200710039171A CN101281398B CN 101281398 B CN101281398 B CN 101281398B CN 200710039171 A CN200710039171 A CN 200710039171A CN 200710039171 A CN200710039171 A CN 200710039171A CN 101281398 B CN101281398 B CN 101281398B
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Abstract
This invention discloses a monitoring system and method for a rotary signal of a redundant fan, which are used for monitoring rotary speeds of two fans. The system includes a generating device of selective signal, a logic gate, a counter and a control device. The generating device of selective signal outputs a selective with two states to the logic gate. The logic gate generates an output rotary speed signal to the counter based on the rotary signal and the selective signal; and the output rotary speed signal represents the rotary speed signal of one of fans. The counter is able to convert the output rotary speed signal to a digital rotary speed date and the control device counts one of fan rotary speeds based on the selective signal and the digital rotary speed. The change of the selective signal is able to enable the system to obtain a personal rotary speed of two fans in different access cycles.
Description
Technical field
The present invention system refers to a kind of system for monitoring rotary speed signal of multiple fans and method especially about the technical field of electronic product heat radiation.
Background technology
Because semiconductor technology is progressive very fast, not only (Integrated Circuit increases transistor size in IC), more improves the execution sequential of integrated circuit at same integrated circuit.By this, allow relevant electronic product improve execution speed and increase many functions.Promote because the transistor size of integrated circuit increases fast and carries out sequential, the heat radiation of electronic product promptly becomes the problem of being badly in need of solution.
Fig. 1 is the synoptic diagram of a known fan monitor module.Hardware monitoring controller (hardware monitorcontroller) 110 utilizes TACH1～4 pin positions to receive and to handle rotation speed of the fan signal (tachometersignal).Yet the pin number amount of hardware monitoring controller 110 is limited, in case need the fan of supervision many more, just needs more hardware monitoring controller.When the pin position of hardware monitoring controller 110 exhausts, also need polygamy to put a hardware monitoring controller 120 even only increase a fan.As shown in Figure 1, hardware monitoring controller 110,120 has four fans respectively and monitors pin position (TACH1～4 pin positions), and fan 131,132,133,134 is monitored by hardware monitoring controller 110.Independent fan 135 is then monitored by hardware monitoring controller 120.Therefore, the remaining fans of hardware monitoring controller 120 monitor the pin positions but thereby idle, and produce waste.So known fan surveillance still has many disappearances and necessity of being improved is arranged.
Summary of the invention
A kind of system for monitoring rotary speed signal of multiple fans and the method for providing is provided the present invention's purpose, to avoid using too much hardware control circuit, to reach the purpose of saving cost.
According to one of the present invention preferred embodiment, be to propose a kind of system for monitoring rotary speed signal of multiple fans, this system comprises: one selects signal generation device, a logic lock, a counter and a control device.Select signal generation device system to select signal in order to produce one.The logic lock receives the rotary speed signal of first fan and second fan and selects the selections signal of signal generation device, in order to do the rotary speed signal of the rotary speed signal of selection first fan or second fan and export an output speed signal.Counter is connected to this logic lock, with the output speed signal of receive logic lock, and converts the output speed signal to digital rotary speed data.Control device is coupled to counter and selects signal generation device, receiving digital rotary speed data and to select signal, and according to selecting signal and digital rotary speed data to calculate the rotating speed of first fan or second fan.
According to another preferred embodiment of the present invention, be to propose a kind of rotary speed signal of multiple fans method for monitoring, comprising: at first read the selection signal, this selects signal to have first state and second state; Then, according to selection signal access first fan that reads or the rotating speed of second fan; Then, read the selection signal once more at least once; Confirm whether the selection signal that reads has equal state; At last, upgrade the rotating speed of first fan or second fan.
According to another preferred embodiment of the present invention, be to propose a kind of rotary speed signal of multiple fans method for monitoring, comprising: at first, read and select signal continuous quadratic (or more than secondary), wherein select signal to have first state and second state; Then, confirm whether the selection signal that reads has equal state; Secondly, according to selection signal access first fan that reads or the rotating speed of second fan; At last, promptly upgrade the rotating speed of first fan or second fan.
Description of drawings
Fig. 1 is the synoptic diagram of a known fan monitor module.
Fig. 2 is the calcspar of a preferred embodiment of the present invention, shows a kind of system for monitoring rotary speed signal of multiple fans.
Fig. 3 is the sequential chart of logic lock in a preferred embodiment of the present invention.
Fig. 4 is the process flow diagram of a preferred embodiment of the present invention, shows a kind of rotary speed signal of multiple fans method for monitoring.
Embodiment
Fig. 2 is the calcspar of a preferred embodiment of the present invention, disclose a kind of system for monitoring rotary speed signal of multiple fans, this system comprises a logic lock 230, a selection signal generation device 240, a hardware monitoring controller (hardware monitor) 250, one control device 260, a display device 270 and an alarming device 280, in order to monitor the rotary speed signal of one first fan 210 and one second fan 220.
This first fan 210 and second fan 220 have output pin position 212,222 respectively.This output pin position 212,222 is exported a rotary speed signal of representing this first fan 210 and second fan, 220 rotating speeds respectively.
This selection signal generation device 240 is selected signal OE in order to produce one.The first input end 231 of this logic lock 230 connects the output pin position 212 of this first fan, second input end 232 connects the output pin position 222 of this second fan, one selects input pin position 233 to be connected to this selection signal generation device 240, to receive this selection signal OE, in order to do the rotary speed signal of the rotary speed signal of selecting this first fan 210 or this second fan 220 and by one of this logic lock 230 output pin position 234 outputs one output speed signal.
This selection signal generation device 240 can be a square wave oscillator (squarewave oscillator) realize that making the selection signal OE of generation is square-wave signal.Wherein, this selection signal OE has one first state and one second state.This first state is a logic high potential, and this second state is a logic low potential.Generally speaking, the best effort cycle (Duty Cycle) of this selection signal OE is 50%.
This logic lock 230 more comprises a phase inverter 235, one first switch 236, reaches one second switch 237.This phase inverter 235 is connected to this selection signal generation device 240, to produce an anti-phase selection signal OE*.
The activation end of this first switch 236 is connected to this selection signal generation device 240, to receive this selection signal OE, its input end is connected to this first input pin position 231, with receive this first fan 210 rotary speed signal, its output terminal is connected to one of this hardware monitoring controller 250 and monitors pin position 252.
The activation end of this second switch 237 is connected to this phase inverter 235, to receive this anti-phase selection signal OE*, its input end is connected to this second input pin position 232, with receive this second fan 220 rotary speed signal, its output terminal also is connected to the supervision pin position 252 of this hardware monitoring controller 250, in other words, the output terminal of second switch 237 is connected (hard wired) or circuit connection (in circuit connection) firmly with the output terminal system of this first switch.
Fig. 3 is the sequential chart of the present invention's logic lock 230.This logic lock 230 is selected signal OE according to this, in order to do the rotary speed signal of the rotary speed signal of selecting this first fan 210 or this second fan 220 as these logic lock 230 output signals.When this selection signal OE was first state (noble potential), logic lock 230 selected the rotary speed signal of this first fan 210 as its output signal.When this selection signal OE was second state (electronegative potential), logic lock 230 selected the rotary speed signal of this second fan 220 as its output signal.
The supervision pin position 252 of this hardware monitoring controller 250 is connected to this logic lock 230, receiving this output speed signal, and converts this output speed signal to digital rotary speed data.This hardware monitoring controller 250 more comprises a counter 251.
This counter 251 is connected to the output pin position 234 of this logic lock 230 through this supervision pin position 252, it receives this output speed signal, and triggers this counter 251 tally functions according to the positive edge (Positive Edge) of this output speed signal.
This control device 260 is coupled to this hardware monitoring controller 250 and this selection signal generation device 240, receiving this numeral rotary speed data and this selection signal OE, and calculate the rotating speed of this first fan or this second fan according to this selection signal OE and this numeral rotary speed data.This control device 260 reads the value of this counter 251 every a time interval, and this control device 260 can calculate this numeral rotary speed data according to the value of the time interval and this counter 251.This control device 260 also should be sent to this display device 270 by the numeral rotary speed data, to show this numeral rotary speed data.This display device 270 can be a liquid crystal display face version (LCD), to show this numeral rotary speed data.This control device 260 can be south bridge, input and output bridge/hub (I/Obridge/hub), super input/output control unit (SIO controller) or other input/output control unit and realizes.
This alarming device 280 is connected to this control device 260, and when the rotating speed of this first fan 210 or one second fan 220 was lower than a default value, this control device 260 produced an alerting, and drives this alarming device 280 with this alerting.This alarming device 260 can be a light emitting diode (LED), to produce a video signal alerting according to this alerting.This alarming device 260 can be a loudspeaker or a hummer, to produce a message alerting according to this alerting.
Fig. 4 is the process flow diagram of a preferred embodiment of the present invention, discloses a kind of rotary speed signal of multiple fans method for monitoring, uses the rotary speed signal of correctly obtaining first fan 210 and second fan 220.The present invention's method for monitoring comprises the execution in step that is stored in one section program code among the BIOS (Basic Input or Output System (BIOS)) in fact, can be read and be carried out by CPU (central processing unit) (CPU).
At first, read one first and select signal OE in step (A), wherein this selection signal has one first state and one second state.This first state is a noble potential, and this second state is an electronegative potential.This selection signal OE is preferably 50% work period (Duty Cycle).Select signal OE system to be sent on the specific pin position (figure does not show) of control device 260 in fact, the selection signal that the state (voltage quasi position) of this specific pin position will be imported changes; When CPU (central processing unit) reads the related program code of this step (A),, and read the selection signal promptly by the state of read control device 260 these specific pin positions.
In step (B), select signal according to this, with the rotary speed signal of choosing this first fan 210 or the rotary speed signal of this second fan 220, to produce an output speed signal.When this selection signal OE was first state (noble potential), the rotary speed signal of choosing this first fan 210 was to produce this output speed signal.When these selection news were second state (electronegative potential), the rotary speed signal of choosing this second fan was to produce this output speed signal.In this step (B), choose the rotary speed signal of first fan 210 or second fan 220 in fact according to selection signal OE by logic lock 230.
In step (C), convert this output speed signal to digital rotary speed data.
In step (D), calculate the rotating speed of this first fan or second fan according to this numeral rotary speed data and this selection signal OE.This control device 260 reads the value of this counter 251 every a time interval, and this control device 260 can calculate this numeral rotary speed data according to the value of the time interval and this counter 251.In fact, under the hardware configuration of difference, step (C) and/or (D) all can independently finish by hardware monitoring controller 250 or control device 260.For example, some south bridge possesses built-in counter, can directly receive the rotary speed signal of fan, does not need to see through the hardware monitoring controller; In other words, this kind south bridge has been integrated the function of certain part hardware monitoring controller.Therefore, the tally function that required person's essence is counter among the present invention, the hardware monitoring controller is not an imperative; And counter can be contained in hardware monitoring controller or the control device.
Moreover counter 251 can be connected directly to general input (GeneralPurpose Input, GPI) pin position or general input and output (General Purpose Input/Output, GPIO) the pin position of this control device 260.On the practice, can further couple a pin position expander (Pinexpander between counter and the control device, figure does not show) on, for example general input/general input and output expander (GPI/GPIOexpander), this pin position expander possesses a plurality of GPI/GPIO pin position, can be with more than received signal, the intermittent control device 260 of sending to; Pin position expander can solve the problem of control device 260 pin position deficiencies.
In step (E), read this selection signal once more, and confirm this time should select the state of signal OE whether whether identical with the middle state of signal OE of selecting of step (A).This confirms that step can be read and judged by CPU (central processing unit).Usually therefore the processing sequential of CPU (central processing unit) is carried out secondary and is confirmed to have quite high accuracy much smaller than the concussion frequency of selecting signal generator; And the above judgement of continuous quadratic also is feasible.On the practice, this step also can be divided into " reading (reread) once more " and " affirmation " two steps.
In step (F), when selecting in the determination step (E) state of signal OE identical with the state of selection signal OE in the step (A), i.e. the rotation speed of the fan that is calculated in the step display (D).This moment, the middle selection of step (A) signal OE was noble potential (an X point) shown in the X point and Y point of Fig. 3, and selecting signal OE in the step (E) also is noble potential (Y point), and being shown in the rotation speed of the fan that is calculated in the step (D) is the rotating speed of this first fan.On the practice, after confirming through determination step (E), be the rotating speed that upgrades (update) this first or second fan by CPU (central processing unit) earlier, this rotating speed be stored in usually deposit within any kenel or even register (register) in.As for showing, warn or other subsequent treatment that end relies the practical application situation and decides.
In step (G), when the state of selecting signal in the state of selecting signal in the determination step (E) and the step (A) is inequality, does not export the rotation speed of the fan that is calculated in the step (D) and keep this rotation speed of the fan of previous demonstration.This moment is shown in the Y point and Z point of Fig. 3, selecting signal OE in the step (A) is noble potential (Y point), selecting signal OE in the step (E) then is electronegative potential (Z point), being shown in the rotation speed of the fan that is calculated in the step (D) may also may be the rotating speed of this second fan for the rotating speed of this first fan, so the time do not export the rotation speed of the fan that is calculated in the step (D) and keep last time this shown rotation speed of the fan of access cycle (last access cycle).Certainly, CPU (central processing unit) will not upgraded last time first or second rotation speed of the fan of access cycle, so show that the result of demonstration is identical with previous shown person even have after the selection signal that the affirmation continuous quadratic reads is different conditions in fact.In the present invention, each access cycle comprises and reads this selection signal at least twice, and confirms whether its state is identical.
In addition, in another preferred embodiment of the present invention, above-mentioned steps (B) to (D) can be merged into the one step (B ') of " according to the rotating speed of selecting signal access (access) first or second fan " in fact, and is performed by logic lock, counter and control device.Therefore, the core technology notion according to the present invention, the rotary speed signal of multiple fans method for monitoring that is disclosed can comprise following steps: at first, read one and select signal; Secondly, select the rotating speed of the signal access first or second fan according to this; Then, read the selection signal once more; Then, confirm whether this two selection signal that reads has equal state.When confirming that the result is for being then to upgrade the rotating speed of first or second fan; If not, then keep first or second rotation speed of the fan in " last time access cycle ".The step of first or second rotation speed of the fan that the demonstration that embodiment mentions has been upgraded can be optionally.
And this step (B ') also can be extended down to step (E) and carries out afterwards again.That is to say, just read the selection signal of continuous quadratic or more (read straight two or more times) at the beginning; And confirm then whether these selection signals that read that read have equal state.When confirming the result for being,, and then upgrade the rotating speed of first or second fan then according to the rotating speed of these selection signal accesses first or second fan; If not, then keep first or second rotation speed of the fan in " last time access cycle ".Step as for showing first or second rotation speed of the fan that has upgraded then can be optionally.The method for monitoring that above-mentioned another preferred embodiment of the present invention of being is realized.
As shown in the above description, the present invention to select the rotary speed signal of first fan 210 or second fan 220, reduces the demand of hardware monitoring controller 250 pin positions by this logic lock 230 by this.Can avoid using too much hardware control circuit, to reach the purpose of saving cost.
Though technology contents of the present invention discloses as above with preferred embodiment, so it is not in order to limiting the present invention, anyly has the knack of this skill person, does a little change and retouching in the spirit that does not break away from the present invention, all should be covered by in the present invention's the category.
Claims (8)
1. system for monitoring rotary speed signal of multiple fans, in order to monitor the rotary speed signal of one first fan and one second fan, this system comprises;
One selects signal generation device, and it selects signal in order to produce one;
One logic lock receives the rotary speed signal of this first fan and this second fan and this selection signal of this selection signal generation device, in order to do the rotary speed signal of the rotary speed signal of selecting this first fan or this second fan and export an output speed signal; Wherein, this logic lock more comprises:
One phase inverter is connected to this selection signal generation device, to produce an anti-phase selection signal;
One first switch, its activation end is connected to this selection signal generation device, and to receive this selection signal, its input end is connected to this first fan, to receive the rotary speed signal of this first fan; And
One second switch, its activation end is connected to this phase inverter, and to receive this anti-phase selection signal, its input end is connected to this second fan, and to receive the rotary speed signal of this second fan, its output terminal is connected with the circuit of output terminal of this first switch;
One counter is connected to the output terminal of first switch of this logic lock, receiving the output speed signal of this logic lock, and converts this output speed signal to digital rotary speed data; And
One control device is coupled to this counter and this selection signal generation device, receiving this numeral rotary speed data and this selection signal, and calculates the rotating speed of this first fan or this second fan according to this selection signal and this numeral rotary speed data.
2. as the system for monitoring rotary speed signal of claim 1, it is characterized in that this selection signal was 50% work period.
3. as the system for monitoring rotary speed signal of claim 1, it is characterized in that this selection signal has one first state and one second state, this first state is a noble potential, and this second state is an electronegative potential; When this selection signal is first state, this logic lock is selected the output speed signal of the rotary speed signal of this first fan for this logic lock, when this selection signal was second state, this logic lock was selected the output speed signal of the rotary speed signal of this second fan for this logic lock.
4. as the system for monitoring rotary speed signal of claim 1, it is characterized in that more comprising a pin position expander, be coupled between this control device and this counter.
5. rotary speed signal of multiple fans method for monitoring, it monitors the rotary speed signal of one first fan and one second fan by the described system for monitoring rotary speed signal of multiple fans of claim 1, this method comprises the following steps:
Read one and select signal, wherein this selection signal has one first state and one second state;
According to this this first fan of selection signal access that reads or the rotating speed of this second fan;
Read this selection signal once more at least once;
Confirm whether the described selection signal that reads has equal state;
When confirming that the result is for being then to upgrade the rotating speed of first fan or second fan;
When confirming the result for not, then keep first fan or second rotation speed of the fan in the access cycle last time.
6. as the rotary speed signal method for monitoring of claim 5, it is characterized in that more comprising following steps in this step according to the rotating speed of this this first fan of selection signal access that reads or this second fan:
Choose the rotary speed signal of this first fan or the rotary speed signal of this second fan according to this selection signal, to produce an output speed signal;
Convert this output speed signal to digital rotary speed data; And
Calculate the rotating speed of this first fan or second fan according to this numeral rotary speed data.
7. as the rotary speed signal method for monitoring of claim 5, when it is characterized in that this selection signal is first state, the rotary speed signal of choosing this first fan is to produce the output speed signal, and when this selection signal was second state, the rotary speed signal of choosing this second fan was to produce this output speed signal.
8. rotary speed signal of multiple fans method for monitoring, it monitors the rotary speed signal of one first fan and one second fan by the described system for monitoring rotary speed signal of multiple fans of claim 1, this method comprises the following steps:
Read one and select signal, wherein this selection signal has one first state and one second state;
Read this selection signal once more at least once;
Confirm whether the described selection signal that reads has equal state;
When confirming that the result is for being, then according to this this first fan of selection signal access that reads or the rotating speed of this second fan; And upgrade the rotating speed of first fan or second fan;
When confirming the result for not, then keep first fan or second rotation speed of the fan in the access cycle last time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710039171A CN101281398B (en) | 2007-04-05 | 2007-04-05 | Method and system for monitoring rotary speed signal of multiple fans |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710039171A CN101281398B (en) | 2007-04-05 | 2007-04-05 | Method and system for monitoring rotary speed signal of multiple fans |
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| Publication Number | Publication Date |
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| CN101281398A CN101281398A (en) | 2008-10-08 |
| CN101281398B true CN101281398B (en) | 2010-05-19 |
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| CN200710039171A Expired - Fee Related CN101281398B (en) | 2007-04-05 | 2007-04-05 | Method and system for monitoring rotary speed signal of multiple fans |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871464A (en) * | 2009-04-24 | 2010-10-27 | 环达电脑(上海)有限公司 | Processing device and reading method of fan rotating speed signals |
| CN102314206A (en) * | 2010-07-06 | 2012-01-11 | 英业达股份有限公司 | Fan speed control device for server |
| CN112922880A (en) * | 2019-12-06 | 2021-06-08 | 佛山市顺德区顺达电脑厂有限公司 | Server fan control system |
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| US5761085A (en) * | 1996-11-12 | 1998-06-02 | The United States Of America As Represented By The Secretary Of The Navy | Method for monitoring environmental parameters at network sites |
| CN1525273A (en) * | 2003-02-27 | 2004-09-01 | ������������ʽ���� | Fan controlling equipment and method |
| CN1612036A (en) * | 2003-10-29 | 2005-05-04 | 株式会社日立制作所 | Active noise controller and projector using the same |
| CN2750086Y (en) * | 2004-08-25 | 2006-01-04 | 周青麟 | Rotary speed control device for fan |
| CN2783383Y (en) * | 2004-12-30 | 2006-05-24 | 浪潮电子信息产业股份有限公司 | Fan check controller |
| CN1854528A (en) * | 2005-04-26 | 2006-11-01 | 台达电子工业股份有限公司 | Fan module and its controller |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5761085A (en) * | 1996-11-12 | 1998-06-02 | The United States Of America As Represented By The Secretary Of The Navy | Method for monitoring environmental parameters at network sites |
| CN1525273A (en) * | 2003-02-27 | 2004-09-01 | ������������ʽ���� | Fan controlling equipment and method |
| CN1612036A (en) * | 2003-10-29 | 2005-05-04 | 株式会社日立制作所 | Active noise controller and projector using the same |
| CN2750086Y (en) * | 2004-08-25 | 2006-01-04 | 周青麟 | Rotary speed control device for fan |
| CN2783383Y (en) * | 2004-12-30 | 2006-05-24 | 浪潮电子信息产业股份有限公司 | Fan check controller |
| CN1854528A (en) * | 2005-04-26 | 2006-11-01 | 台达电子工业股份有限公司 | Fan module and its controller |
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