KR20140044457A - Temperatuer control device for industrial electronic device using smbus and control method thereof - Google Patents

Temperatuer control device for industrial electronic device using smbus and control method thereof Download PDF

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Publication number
KR20140044457A
KR20140044457A KR1020120110425A KR20120110425A KR20140044457A KR 20140044457 A KR20140044457 A KR 20140044457A KR 1020120110425 A KR1020120110425 A KR 1020120110425A KR 20120110425 A KR20120110425 A KR 20120110425A KR 20140044457 A KR20140044457 A KR 20140044457A
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KR
South Korea
Prior art keywords
temperature
fan
smbus
system board
control device
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Application number
KR1020120110425A
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Korean (ko)
Inventor
성웅기
Original Assignee
주식회사 여의시스템
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Priority to KR1020120110425A priority Critical patent/KR20140044457A/en
Publication of KR20140044457A publication Critical patent/KR20140044457A/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means
    • G06F1/206—Cooling means comprising thermal management
    • 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

Abstract

The present invention discloses a temperature control device using a SMBUS and a control method thereof that can be stably controlled in temperature and separated from the system board and minimize the effects of system errors even when integrally formed in the system. The temperature control device according to the present invention is formed on a substrate provided separately from the system board, the SMBUS controller for transmitting and receiving data through the system board and SMBUS (System Management Bus), which counts the pulse corresponding to the rotational speed of the fan for cooling The duty cycle of the PWM generator is adjusted according to the result of comparing the pulse counter, the PWM generator for generating the PWM pulses for driving the fan, and the current temperature detected by the temperature sensor with the reference temperature received through the SMBUS controller. It may include a temperature control unit for controlling the rotational speed of the cooling fan.

Figure P1020120110425

Description

Temperatuer control device for industrial electronic device using SMBUS and control method

The present invention relates to a temperature control device and a control method thereof, and more particularly, to a temperature control device capable of automatically controlling the internal temperature of an industrial electronic device such as an industrial computer or a measuring device using a system management bus (SMBUS). And a control method thereof.

In general, a computer or measuring equipment having a computer motherboard or an industrial system board includes an X86 series of processors, memory, storage, input / output devices, and display-related devices. It is mainly equipped with an air-cooled heating device to prevent.

The air-cooled heat dissipation device is typically implemented by logic installed on-board on a system board or controlled by a BIOS-ROM provided on the system board. Then, after measuring the temperature of the system board or the temperature of each device by logic or BIOS ROM implemented on-board, if the measured temperature exceeds the preset reference temperature, the performance of the air-cooled radiator is increased by increasing the performance of the system board. It limits fever.

However, logic or BIOS ROM installed on the system board may cause problems in controlling the air-cooled heat sink normally when the system board itself fails, when the system is overloaded, or when the system is down. Have possession.

Therefore, it is necessary to control the air-cooled radiator to operate normally even when the system is not in a normal operating state.

An object of the present invention is to provide a temperature control device and a method of controlling the same, which are formed separately from the system board and perform SMBUS communication with the system board, thereby minimizing the influence of temperature control by a system error.

Temperature control device according to the present invention for achieving the above object is formed on a substrate provided separately from the system board, the SMBUS controller for transmitting and receiving data through the system board and SMBUS (System Management Bus), rotation of the fan for cooling A pulse counting unit for counting pulses corresponding to the number, a PWM generating unit for generating PWM pulses for driving the fan, and a result of comparing a current temperature value detected by a temperature sensor with a reference temperature transmitted through the SMBUS controller The temperature controller may include a temperature controller configured to control a rotation speed of the cooling fan by adjusting a duty cycle of the PWM generator.

In addition, the temperature control method according to the present invention, in the device having a temperature sensor, a fan for cooling, and a system board to control the internal temperature, formed on a substrate provided separately from the system board, the system board and SMBUS According to a result of the step of providing a temperature control device for transmitting and receiving data through a (System Management Bus), and comparing the current temperature value detected by the temperature sensor in the temperature control device with the reference temperature transmitted to the SMBUS, Controlling the rotational speed of the.

In order to achieve the above object, the present invention can provide a system having the temperature control device.

According to the present invention, by using the SMBUS and a temperature control device separated from the system board, it is possible to stably control the internal temperature for the industrial electronic device irrespective of the system operating state. Accordingly, by minimizing the influence of temperature control by a system error, it is possible to ensure stable operation of the industrial electronics.

1 is a block diagram of a temperature control device according to an embodiment of the present invention;
2 is a conceptual diagram of a temperature control device according to another embodiment of the present invention, and
3 is a flowchart provided to explain a method for controlling a temperature control device according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. .

1 is a block diagram of a temperature control device according to an embodiment of the present invention.

Referring to FIG. 1, the temperature control device 100 according to the present exemplary embodiment is formed separately from the system board 200 and is communicatively connected to the system board 200 through a system management bus (SMBUS).

SMBUS is a system management bus, defined by Intel in 1995, that is a two-wire serial bus used to communicate data with low-speed devices. The communication frequency range of SMBUS is in the range of 10 kkHz to 100 kkHz, and is mainly used for power management and temperature management. SMBUS is used for system diagnosis because of low data communication speed and easy access for users.

The system board 200 is a motherboard used for an industrial, measurement, or personal computer. The system board 200 is a storage device (not shown) such as a processor (CPU) 220, a memory (not shown), a hard disk drive, or a flash memory. , An input / output device (not shown), and a display related device (not shown). Among the devices included in the system board 200, a display related device such as a processor 220 or a video accelerator card generates higher heat than other devices. In addition, heat emitted by the devices included in the system board 200 may increase the temperature of the entire system board 200 accommodated in the case.

Therefore, the air cooling fan 50 for dissipating heat may be mounted on each device, or may be mounted only on the processor 220 that generates the most heat among the devices. In addition, one or more fans 50 may be mounted in a case in which the system board 200 is mounted.

The fan 50 may be operated or rotated according to a current temperature value measured by the temperature sensor 60. The fan 50 is controlled by the temperature controller 100 using the SMBUS formed on a separate board from the system board 200.

The current temperature value measured by the temperature sensor 60 is provided to the temperature control device 100, the temperature control device 100 controls the PWM generator 140 when the current temperature exceeds a preset reference temperature By adjusting the duty cycle of the PWM, the rotation speed of the fan 50 can be increased. In this case, the PWM duty cycle set by the PWM generator 140 is set by the temperature controller 120, and the temperature controller 120 obtains a preset reference temperature through a control program installed on the system board 200. Alternatively, the user may be configured to set a reference temperature by using an input key (not shown) provided in the temperature control device 100.

The pulse counting unit 110 may be directly connected to the fan 50, determine a rotation speed of the fan 50 by obtaining a tacho pulse of the fan 50, and provide the same to the temperature controller 120. have. The taco pulse is measured by an optical sensor housed in the fan 50, and the rotation speed of the fan 50 can be calculated whenever the vanes constituting the fan 50 pass the optical sensor. For example, if the blade of the fan 50 is five and the optical sensor detects the movement of the blade five times, it may be determined that the blade of the fan 50 has made one rotation.

The PWM generator 140 generates a PWM pulse according to the pulse period set by the temperature controller 120 and provides the same to the fan 50.

The fan 50 can be driven by direct current, alternating current, or PWM pulses. In this embodiment, assuming that the fan 50 is driven by direct current or PWM pulse, by adjusting the PWM duty cycle applied to the fan 50, the rotation speed of the cooling fan 50 can be increased or decreased. Can be.

If the rotation speed of the fan 50 is to be increased, the PWM duty cycle High may be increased to allow the PWM pulse to be applied to the fan 50. If the rotational speed of the cooling fan 50 is to be lowered, the width of the high level may be reduced in the PWM duty cycle so that the cooling fan 50 is intermittently driven.

The temperature controller 120 compares the reference temperature provided by the system board 200 with the current temperature through the SMBUS controller 130, and, when the current temperature exceeds the reference temperature according to the comparison result, the PWM generator 140. When the current temperature value is less than the reference temperature, the width of the high level is decreased by increasing the width of the high level in the duty cycle of the PWM generator 140. Can be.

In this case, the temperature controller 120 may adjust the duty cycle set in the PWM generator 140 according to the deviation between the current temperature value and the reference temperature. For example, when the reference temperature is 24 degrees and the current temperature measured by the temperature sensor 60 is 26 degrees, the PWM duty cycle of the PWM generator 140 may be set to increase the rotation speed of the cooling fan 50 by 10%. have. In addition, when the current temperature exceeds 30 degrees, the PWM duty cycle generated by the PWM generator 140 may be set such that the rotation speed of the cooling fan 50 increases by 30% or more. That is, the temperature controller 120 may set the rotation speed of the cooling fan 50 according to the deviation between the reference temperature and the current temperature.

On the other hand, in the embodiment of Figure 1, the system board 200 may be installed a monitoring program of the temperature sensor 60, the monitoring program of the temperature sensor 60 is the current temperature value measured by the temperature sensor 60 When the reference temperature is exceeded, an alarm event may be generated and the generated alarm event may be provided to the SMBUS controller 130 of the temperature control device 100 through the SMBUS controller 210.

In this case, the SMBUS controller 130 provides the received alarm event to the temperature controller 120, and the temperature controller 120 increases the rotation speed of the cooling fan 50 until the alarm event is not received. The heat of 200 may be dissipated.

2 is a conceptual diagram of a temperature control apparatus using SMBUS according to another embodiment of the present invention.

Referring to FIG. 2, the temperature control apparatus using the SMBUS may be implemented in a form of mounting on an expansion card mounted in the expansion slot 202 provided in the system board 200.

The system board 200 may include a separate SMBUS connector 205 to perform data communication with the temperature controller 100 mounted on the expansion card. The expansion slot 202 is basically configured to provide at least one of 3.3V, 5V, and 12V power to the expansion card, so that the temperature controller 100 mounted on the expansion card is driven through the expansion slot 202. Power can be obtained. Even if an error occurs in the system board 200, if the driving power itself provided through the expansion slot 202 is configured to be continuously provided, the temperature controller 100 mounted and detached from the system board 200 is Operation may be guaranteed regardless of whether an error occurs in the system board 200.

As shown in FIG. 1, the temperature controller 100 having a form mounted on the expansion card includes an SMBUS controller 130, a pulse counter 110, a PWM pulse generator 140, and a temperature controller 120. ) Can be configured. Accordingly, duplicate descriptions of the SMBUS controller 130, the pulse counter 110, the PWM pulse generator 140, and the temperature controller 120 are omitted, and descriptions of these components are described with reference to FIG. 1. Replace with

Although the temperature controller 100 is integrally formed by being mounted on the system board 200, the temperature controller 100 is hardly influenced by an operation state of the system board 200 or an error. This is because the driving power is supplied only through the expansion slot 202 provided in the system board 200. The timing error of the system board 200, a memory control error, a control error due to overheating of the processor, and other system boards 200 are provided. This is because it is not affected by the error in).

In the embodiment of FIG. 2, the temperature control apparatus 100 using the SMBUS may use the SMBUS through the expansion slot 202. In this case, a connection pin must be provided in the expansion slot to enable data communication using SMBUS, and a board supporting the temperature control device using SMBUS must also be provided with a connection terminal in electrical contact with the SMBUS connection pin provided in the expansion slot. do. The expansion slot 202 may be any one of a peripheral component interconnect (PCI) standard, a PCI-Express (PCI-Express) standard, an Industry Standard Architecture (ISA) standard, and an Accelerated Graphics Port (AGP) standard. The temperature control device 100 using the SMBUS mounted on the 202 also needs to be formed with a connection terminal for acquiring the driving power in accordance with the standard of the expansion slot 202. In this case, connection terminals other than the connection terminal for obtaining the driving power may be removed from the substrate.

3 is a flowchart provided to explain a control method of a temperature control apparatus according to an embodiment of the present invention.

Referring to FIG. 3, first, a reference temperature for controlling the internal temperature is set (S300). The reference temperature may be set in the system board 200 and transferred to the temperature controller 100 through the SMBUS. However, it is also possible to set via an input key or the like provided in the temperature control device 100.

Next, the temperature control device 100 collects data such as the current temperature and the current fan speed (S305). As described above, the current temperature and the fan speed may be obtained by collecting a tacho pulse of the temperature sensor 60 and the cooling fan 50.

The temperature controller 120 determines whether the current temperature is higher than the reference temperature by comparing the current temperature with the reference temperature in the collected data (S310). As a result of the determination in step S310, if the current temperature is higher than the reference temperature, the temperature controller 120 may increase the rotation speed of the fan 50 by increasing the high PWM duty cycle generated by the PWM generator 140. (S315).

Next, the temperature controller 120 compares the reference temperature with the current temperature, and determines whether the reference temperature is higher than the current temperature (S320). As a result of the determination in step S320, when the reference temperature is higher than the current temperature, the temperature controller 120 may decrease the rotation speed of the fan 50 by reducing the high of the PWM duty cycle generated by the PWM generator 140 ( S325).

In addition, the system board 200 may receive the current temperature and the rotation speed of the fan 50 through the SMBUS, and monitor the same to determine whether there is an abnormality.

This process is repeatedly performed until the system power is turned off (S330), and can be automatically adjusted to approach the reference temperature inside the system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

100: temperature controller 200: system board
110: pulse counting unit 120: temperature control unit \
130: SMBUS controller 140: PWM generator

Claims (10)

It is formed on a substrate provided separately from the system board,
SMBUS controller for transmitting and receiving data through the system board and the SMBUS (System Management Bus);
A pulse counting unit for counting pulses corresponding to the rotational speed of the fan for cooling;
A PWM generator which generates a PWM pulse for driving the fan; And
Temperature control including a temperature controller for controlling the rotational speed of the cooling fan by adjusting the duty cycle of the PWM generator according to the result of comparing the current temperature value detected by the temperature sensor and the reference temperature received through the SMBUS controller Device. The method of claim 1,
The temperature controller controls the duty cycle generated by the PWM generator to increase the rotation speed of the fan when the current temperature value is greater than the reference temperature.
And controlling the duty cycle generated by the PWM generator to reduce the rotation speed of the fan when the current temperature value is smaller than the reference temperature. The method of claim 1,
And the system board receives the present temperature value and provides an interrupt signal to the temperature controller through the SMBUS controller when the present temperature value exceeds the reference temperature. The method of claim 1,
The temperature control device is mounted to an expansion slot provided on the system board, the temperature control device characterized in that the drive power supply. The method of claim 1,
Temperature control device further comprises an input key for setting the reference temperature. A system comprising the temperature control device as claimed in claim 1. In the temperature control method for controlling the internal temperature in a device having a temperature sensor, a fan for cooling, and a system board,
Providing a temperature control device formed on a substrate provided separately from the system board and transmitting and receiving data to and from the system board through a system management bus (SMBUS); And
And controlling the rotation speed of the fan according to a result of comparing the current temperature detected by the temperature sensor with the reference temperature transmitted by the SMBUS by the temperature controller. 8. The method of claim 7,
Monitoring the current temperature value and the rotation speed of the fan in the system board. 8. The method of claim 7,
The temperature control device is a temperature control method, characterized in that for controlling the rotational speed of the fan by controlling any one of a pulse and a voltage applied to the fan. 8. The method of claim 7,
And setting the reference temperature by using an input key provided in the temperature control device.
KR1020120110425A 2012-10-05 2012-10-05 Temperatuer control device for industrial electronic device using smbus and control method thereof KR20140044457A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108506238A (en) * 2018-03-02 2018-09-07 盛科网络（苏州）有限公司 The method of Ethernet switching chip integration fan controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108506238A (en) * 2018-03-02 2018-09-07 盛科网络（苏州）有限公司 The method of Ethernet switching chip integration fan controller

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