CN110043496B - Fan control system and method - Google Patents
Fan control system and method Download PDFInfo
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- CN110043496B CN110043496B CN201810040533.0A CN201810040533A CN110043496B CN 110043496 B CN110043496 B CN 110043496B CN 201810040533 A CN201810040533 A CN 201810040533A CN 110043496 B CN110043496 B CN 110043496B
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- fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
Abstract
The invention provides a fan control system and a method, which comprises a fan, a control unit and a fan chip, wherein the fan chip comprises an instruction list, a first special pulse pattern and a second special pulse pattern are respectively defined in the fan chip, the first special pulse pattern represents a code in a first form, the second special pulse pattern represents a code in a second form, at least one control instruction is recorded in the instruction list, each control instruction is respectively corresponding to a code character string, when the fan chip receives a series of pulse signals from the control unit and judges the code character string represented by the series of pulse signals, the corresponding control instruction is inquired from the instruction list according to the judged code character string, so as to set at least one operation parameter of the fan chip or control the fan to execute a corresponding operation according to the inquired control instruction.
Description
Technical Field
The invention relates to a system and a method for controlling a fan by chopsticks, in particular to a system and a method for setting parameters of a fan chip by using a control instruction with a special pulse pattern.
Background
Nowadays, with the development of information being on the rise, electronic devices are endowed with more functions to improve the use value. Many components are required to be disposed inside the multifunctional electronic device, and these components not only increase the circuit density of the electronic device, but also increase the temperature of the electronic device during operation. In order to prevent the electronic device from overheating during operation, a fan is usually further disposed inside the electronic device. The rotation of the fan is utilized to assist the electronic device in operation to dissipate heat. The operation of the fan is typically controlled by a fan chip. The rotating speed of the fan can reach the required rotating speed through the control of the fan chip.
The fan chip generally uses two simple pins (i.e., an input pin and an output pin) to control the operation of the fan. The conventional fan chip can only realize the basic control of the rotating speed of the fan by utilizing the two pins, and more pins are required to be built if the fan chip is to achieve further control. However, increasing the number of pins on the fan chip is not compatible with the communication interfaces in the current electronic devices, such as I2C, SPI, and UART interfaces, and in the trend of miniaturization of the electronic devices, there is not necessarily enough space to accommodate more pins.
Disclosure of Invention
The invention provides a fan control system and method, wherein the fan control system comprises a fan, a control unit and a fan chip, a first special pulse pattern and a second special pulse pattern are sent to the fan chip, the first special pulse pattern represents a code of a first form, the second special pulse pattern represents a code of a second form, when the fan chip receives a series of pulse signals from the control unit through an input pin, a code character string represented by the series of pulse signals is distinguished, a corresponding control instruction is inquired according to the distinguished code character string, and at least one operating parameter of the fan chip is set according to the inquired control instruction.
To achieve the above object, the present invention provides a fan control system, comprising: a fan; a control unit; the fan chip comprises an input pin and an output pin, and is used for storing an instruction list and defining a fan rotation pulse pattern, a first special pulse pattern and a second special pulse pattern; when the fan chip receives a pulse signal from the control unit and judges that the pulse signal is a pulse signal with a fan rotation pulse pattern, the fan is driven to rotate according to the pulse signal with the fan rotation pulse pattern; when the fan chip receives a series of pulse signals from the control unit and judges that the series of pulse signals are all pulse signals of a first special pulse pattern, pulse signals of a second special pulse pattern or pulse signals combined by the first special pulse pattern and the second special pulse pattern, code character strings represented by the series of pulse signals are judged, corresponding control instructions are inquired from the instruction list according to the judged code character strings, and at least one operation parameter of the fan chip is set according to the inquired control instructions or the fan is controlled to execute corresponding operation.
In one embodiment of the present invention, the first form of code is "0" and the second form of code is "1".
In an embodiment of the invention, the first special pulse pattern and the second special pulse pattern are symmetrical pulse patterns.
In an embodiment of the present invention, the fan chip further defines a third special pulse pattern, where the third special pulse pattern is used to represent an end code of a control instruction, and when the fan chip receives a pulse signal containing at least one third special pulse pattern from the control unit, it is known that the code string to which the control instruction belongs has been transmitted.
In an embodiment of the present invention, the fan chip utilizes a firmware to identify whether the pulse of the pulse signal transmitted by the control unit is a fan rotation pulse pattern, a first special pulse pattern, a second special pulse pattern or a third special pulse pattern.
In an embodiment of the invention, the fan chip further includes a comparison circuit, and the fan chip uses the comparison circuit to identify whether the pulse of the pulse signal transmitted by the control unit is a fan rotation pulse pattern, a first special pulse pattern, a second special pulse pattern or a third special pulse pattern.
The invention also provides a fan control method, which is applied to a fan control system, wherein the fan control system comprises a fan, a control unit and a fan chip, the fan chip comprises an instruction list, and the fan control method comprises the following steps: defining a fan rotation pulse pattern, a first special pulse pattern and a second special pulse pattern in the fan chip, wherein the first special pulse pattern is used for representing a code of a first form, and the second special pulse pattern is used for representing a code of a second form; recording at least one control instruction into an instruction list, wherein each control instruction corresponds to a code character string respectively; when the fan chip receives a pulse signal from the control unit and judges that the pulse signal is a fan rotation pulse type pulse signal, the fan is driven to rotate; when the fan chip receives a series of pulse signals from the control unit and judges that the series of pulse signals are all pulse signals of a first special pulse pattern, pulse signals of a second special pulse pattern or pulse signals combined by the first special pulse pattern and the second special pulse pattern, code character strings represented by the series of pulse signals are judged; inquiring a corresponding control instruction from an instruction table according to the distinguished code character string; and setting at least one operation parameter of the fan chip or controlling the fan to execute a corresponding operation according to the inquired control instruction.
The first form of code is "0" and the second form of code is "1".
In an embodiment of the present invention, the method further comprises the following steps: defining a third special pulse pattern into the fan chip, wherein the third special pulse pattern represents an end code of the code character string; and when the fan chip receives a pulse signal containing at least one third special pulse pattern from the control unit, the fan chip knows that the code character string to which the control command belongs is transmitted completely.
The fan chip utilizes a firmware or a comparison circuit to distinguish the pulse of the pulse signal transmitted by the control unit as the fan rotation pulse pattern, the first special pulse pattern, the second special pulse pattern or the third special pulse pattern.
The invention has the beneficial effects that: the invention relates to a fan control system and a method, wherein the fan control system comprises a fan, a control unit and a fan chip, a first special pulse pattern and a second special pulse pattern are sent to the fan chip, the first special pulse pattern represents a code of a first form, the second special pulse pattern represents a code of a second form, when the fan chip receives a series of pulse signals from the control unit through an input pin, a code character string represented by the series of pulse signals is distinguished, a corresponding control instruction is inquired according to the distinguished code character string, and at least one operating parameter of the fan chip is set according to the inquired control instruction.
Drawings
FIG. 1: the present invention provides a fan control system with a simplified structure.
FIG. 2: the present invention is a signal waveform diagram of different pulse signals.
Reference numerals: 100: a fan control system; 101: a control instruction; 10: a fan chip; 11: a firmware; 111: fan rotation pulse patterns; 113: a first special pulse pattern; 115: a second special pulse pattern; 117: a third special pulse pattern; 13: an instruction list; 131: a control instruction; 132: a control instruction; 139: a control instruction; 21: a pulse signal; 22: a pulse signal; 23: a pulse signal; 24: a pulse signal; 30: a control unit; 50: a fan.
Detailed Description
Please refer to fig. 1 and fig. 2, which are a schematic structural diagram of an embodiment of a fan control system according to the present invention and a signal waveform diagram of a pulse signal according to the present invention. As shown in fig. 1, the fan control system 100 of the present invention includes a fan chip 10, a control unit 30 and a fan 50. The pins of the fan chip 10 include an input pin (DI), an output pin (FG), a power pin and a ground pin. The fan chip 10 is connected to the control unit 30 via an input pin (DI), and is connected to the fan 50 via an output pin (FG). The control unit 30 may also be a controller, a processor or a BIOS (Basic Input/output system) in an electronic device, and is configured to transmit at least one pulse signal to the fan chip 10 to control the fan chip 10 to drive the fan 50 to operate, set an operation parameter of the fan chip 10 or control the fan 50 to perform a corresponding operation.
The fan chip 10 includes a storage instruction table 13, and is defined with a fan rotation pulse pattern 111, a first special pulse pattern 113 and a second special pulse pattern 115. In an embodiment of the invention, the fan chip 10 may also define the fan rotation pulse pattern 111, the first special pulse pattern 113 and the second special pulse pattern 115 by using a firmware 11 or a hardware circuit. In an embodiment of the present invention, the first special pulse pattern 113 and the second special pulse pattern 115 respectively have a pulse duty ratio with a large variation, and the first special pulse pattern 113 and the second special pulse pattern 115 may also be symmetrical pulse patterns, for example, the duty ratio of the first special pulse pattern 113 is 10%, and the duty ratio of the second special pulse pattern 115 is 90%. The first special pulse pattern 113 is used to represent a first type of code, and the second special pulse pattern 115 is used to represent a second type of code. In one embodiment of the present invention, the first form of code is "0" and the second form of code is "1". The command table 13 records at least one control command 131, 132, 139, where each control command 131, 132, 139 corresponds to a code string and is used to set an operation parameter of the fan chip 10, for example: the code string of the control command 131 is "00000000" and is used to set a parameter for the low temperature mode, the code string of the control command 132 is "01010101" and is used to set a parameter for the low noise mode, and the code string of the control command 139 is "11111111" and is used to set a parameter for the high speed mode.
Referring to fig. 2, when the control unit 30 requests the fan chip 10 to perform a normal fan operation procedure, the pulse signal 21 of at least one fan rotation pulse pattern 111 is generated and the pulse signal 21 of the fan rotation pulse pattern 111 is transmitted to the fan chip 10. The fan chip 10 receives the pulse signal 21 of the fan rotation pulse pattern 111 through the input pin (DI), generates a fan rotation speed control command 101 according to a duty ratio (e.g., duty cycle is 60%) of each pulse in the pulse signal 21 of the fan rotation pulse pattern 111, and sequentially transmits the fan rotation speed control command 101 to the fan 50 through the output pin (FG). The fan 50 will operate at a nominal speed as required by the fan speed control command 101.
Alternatively, when the control unit 30 intends to set an operation parameter of the fan chip 10 for the fan chip 10, a series of pulse signals 22/23/24 including the first special pulse pattern 113 and/or the second special pulse pattern 115 are transmitted to the fan chip 10. After the fan chip 10 receives the series of pulse signals 22/23/24, the code string represented by the series of pulse signals 22/23/24 is determined, the corresponding control command 131/132/139 is looked up from the command table 13 according to the determined code string, and at least one operating parameter of the fan chip 10 is set or the fan 50 is controlled to perform a corresponding operation according to the looked-up control command 131/132/139.
For example, when the control unit 30 sets a parameter of the low temperature mode for the fan chip 10, a series of pulse signals 22 each having the first special pulse pattern 113 are transmitted to the fan chip 10. After the fan chip 10 receives the pulse signal 22, it determines that the code character string represented by the pulse signal 22 is "00000000", and queries the corresponding control command 131 from the command table 13 according to the determined code character string "00000000", and requests the firmware 11 to execute the parameter setting of the low temperature mode according to the queried control command 131. For another embodiment, when the control unit 30 intends to set a parameter of the low noise mode for the fan chip 10, the pulse signal 23 composed of the first special pulse pattern 113 and the second special pulse pattern 115 is transmitted to the fan chip 10. After the fan chip 10 receives the pulse signal 23, it determines that the code string represented by the pulse signal 23 is "01010101", and queries the corresponding control command 132 from the command table 13 according to the determined code string "01010101", and requests the firmware 11 to execute the parameter setting of the low noise mode according to the queried control command 132. Alternatively, for example, in another embodiment, when the control unit 30 intends to set a parameter of the high speed mode for the fan chip 10, a series of pulse signals 24 each having the second special pulse pattern 115 are transmitted to the fan chip 10. After the fan chip 10 receives the pulse signal 24, it determines that the code string represented by the pulse signal 24 is "11111111", and queries the corresponding control command 139 from the command table 13 according to the determined code string "11111111", and requests the firmware 11 to execute the parameter setting of the high speed mode according to the queried control command 139. The above three embodiments are only some embodiments of the present invention, and the present invention can also define more control commands and code strings thereof between the fan chip 10 and the control unit 30 for setting different operating parameters or controlling the fan 50 to perform different operations.
Further, the fan chip 10 further defines a third special pulse pattern 117. Similarly, the fan chip 10 defines the third special pulse pattern 117 through the firmware 11 or hardware. The third special pulse pattern 117 represents an end code "E" of a control command 131/132/139. When the fan chip 10 receives the pulse signal 22/23/24 containing at least one third special pulse pattern 117 from the control unit 30, it will know that the code string of the pulse pattern to which the control command 131/132/139 belongs has been transmitted.
Furthermore, the fan chip 10 of the present invention selects a firmware manner (such as firmware 11) to determine whether the pulse in the pulse signal 21/22/23/24 transmitted by the control unit 30 is the fan rotation pulse pattern 111, the first special pulse pattern 113, the second special pulse pattern 115, or the third special pulse pattern 117; alternatively, the fan chip 10 of the present invention can also select a hardware manner (e.g., a comparator circuit composed of comparators) to identify the pulses in the pulse signal 21/22/23/24 transmitted by the control unit 30 as the fan-rotating pulse pattern 111, the first special pulse pattern 113, the second special pulse pattern 115, or the third special pulse pattern 117.
Herein, the fan chip 10 of the present invention can receive a series of pulse signals 22/23/24 from the control unit 30 through the input pin (DI), determine a code string represented by the series of pulse signals 22/23/24, and query a corresponding control command 131/132/139 according to the determined code string, so as to set at least one operating parameter of the fan chip 10 according to the queried control command 131/132/139, so that the fan chip 10 can control the fan 10 to operate under a required operating condition.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims, and all changes and modifications that are equivalent in shape, structure, characteristics, and spirit to be described are intended to be included therein.
Claims (9)
1. A fan control system, comprising:
a fan;
a control unit; and
a fan chip, including an input pin and an output pin, storing an instruction list, defining a fan rotation pulse pattern, a first special pulse pattern and a second special pulse pattern, the input pin is connected with the control unit, the output pin is connected with the fan, the first special pulse pattern is used for representing a code of a first form, the second special pulse pattern is used for representing a code of a second form, the instruction list records at least one control instruction, each control instruction corresponds to a code character string;
when the fan chip receives a pulse signal from the control unit and judges that the pulse signal is a pulse signal with the fan rotation pulse pattern, the fan is driven to rotate according to the pulse signal with the fan rotation pulse pattern; when the fan chip receives a series of pulse signals from the control unit and judges whether the series of pulse signals are all pulse signals of the first special pulse pattern, pulse signals of the second special pulse pattern or pulse signals combined by the first special pulse pattern and the second special pulse pattern, the code character string represented by the series of pulse signals is judged, the corresponding control instruction is inquired from the instruction list according to the judged code character string, at least one operation parameter of the fan chip is set or the fan is controlled to execute a corresponding operation according to the inquired control instruction, wherein the fan chip is further defined with a third special pulse pattern which is used for representing an end code of the control instruction, when the fan chip receives the pulse signal containing at least one third special pulse pattern from the control unit, the control unit knows that the code character string to which the control command belongs is completely transmitted.
2. The fan control system of claim 1 wherein the first form of code is a "0" and the second form of code is a "1".
3. The fan control system of claim 1, wherein the first and second special pulse patterns are symmetrical pulse patterns to each other.
4. The fan control system as claimed in claim 1, wherein the fan chip utilizes a firmware to recognize whether the pulse of the pulse signal transmitted by the control unit is the fan rotation pulse pattern, the first special pulse pattern, the second special pulse pattern or the third special pulse pattern.
5. The fan control system as claimed in claim 1, wherein the fan chip further comprises a comparison circuit, and the fan chip uses the comparison circuit to identify whether the pulse of the pulse signal transmitted by the control unit is the fan rotation pulse pattern, the first special pulse pattern, the second special pulse pattern or the third special pulse pattern.
6. A fan control method is applied to a fan control system, and is characterized in that the fan control system comprises a fan, a control unit and a fan chip, the fan chip comprises an instruction list, and the fan control method comprises the following steps:
defining a fan rotation pulse pattern, a first special pulse pattern and a second special pulse pattern into the fan chip, wherein the first special pulse pattern is used for representing a code of a first form, and the second special pulse pattern is used for representing a code of a second form;
recording at least one control instruction into the instruction list, wherein each control instruction corresponds to a code character string;
when the fan chip receives a pulse signal from the control unit and judges that the pulse signal is a fan rotation pulse type pulse signal, the fan is driven to rotate;
when the fan chip receives a series of pulse signals from the control unit and judges that the series of pulse signals are all pulse signals of the first special pulse pattern, pulse signals of the second special pulse pattern or pulse signals combined by the first special pulse pattern and the second special pulse pattern, the code character string represented by the series of pulse signals is judged;
inquiring the corresponding control instruction from the instruction table according to the distinguished code character string; and
and setting at least one operating parameter of the fan chip or controlling the fan to execute a corresponding operation according to the inquired control instruction.
7. The fan control method according to claim 6, wherein the code of the first form is "0" and the code of the second form is "1".
8. The method as claimed in claim 6, further comprising the steps of:
defining a third special pulse pattern into the fan chip, wherein the third special pulse pattern represents an end code of the code character string; and
when the fan chip receives the pulse signal containing at least one third special pulse pattern from the control unit, the fan chip knows that the code character string to which the control command belongs is transmitted completely.
9. The method as claimed in claim 8, wherein the fan chip utilizes a firmware or a comparison circuit to identify whether the pulse of the pulse signal transmitted by the control unit is the fan rotation pulse pattern, the first special pulse pattern, the second special pulse pattern or the third special pulse pattern.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810040533.0A CN110043496B (en) | 2018-01-16 | 2018-01-16 | Fan control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810040533.0A CN110043496B (en) | 2018-01-16 | 2018-01-16 | Fan control system and method |
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| CN110043496A CN110043496A (en) | 2019-07-23 |
| CN110043496B true CN110043496B (en) | 2020-08-21 |
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| CN201810040533.0A Active CN110043496B (en) | 2018-01-16 | 2018-01-16 | Fan control system and method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111188783B (en) * | 2020-01-15 | 2022-03-18 | 上海禾土机电科技有限公司 | Industrial fan controller and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581671A (en) * | 2003-08-07 | 2005-02-16 | 奇鋐科技股份有限公司 | Radiating fan pulse width modulating-conversion control system |
| CN101443718A (en) * | 2004-12-23 | 2009-05-27 | 美蓓亚株式会社 | Microcontroller methods of improving reliability in DC brushless motors and cooling fans |
| CN102654131A (en) * | 2011-03-04 | 2012-09-05 | 鸿富锦精密工业（深圳）有限公司 | Fan rotation speed controlling device |
| US20160308482A1 (en) * | 2013-12-04 | 2016-10-20 | Robert Bosch Gmbh | Electric motor comprising a device for generating a sequence of signals |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201207603A (en) * | 2010-08-12 | 2012-02-16 | Hon Hai Prec Ind Co Ltd | Fan rotating speed control system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581671A (en) * | 2003-08-07 | 2005-02-16 | 奇鋐科技股份有限公司 | Radiating fan pulse width modulating-conversion control system |
| CN101443718A (en) * | 2004-12-23 | 2009-05-27 | 美蓓亚株式会社 | Microcontroller methods of improving reliability in DC brushless motors and cooling fans |
| CN102654131A (en) * | 2011-03-04 | 2012-09-05 | 鸿富锦精密工业（深圳）有限公司 | Fan rotation speed controlling device |
| US20160308482A1 (en) * | 2013-12-04 | 2016-10-20 | Robert Bosch Gmbh | Electric motor comprising a device for generating a sequence of signals |
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