CN2674165Y - Computer fan speed control and temperature sensing device - Google Patents

Abstract

The utility model discloses a computer fan rotating speed control and temperature sensing device, which comprises an external temperature sensing circuit, a fan speed sensing input circuit, a fan rotating speed adjusting circuit, a temperature setting selection circuit, a wind speed setting selection circuit, a display and a crystal oscillator; the temperature sensing circuit, the fan speed sensing input circuit, the fan rotating speed adjusting circuit, the temperature setting selection circuit, the wind speed setting selection circuit, the display and the crystal oscillator are respectively connected with the central processing unit. The utility model discloses can respond to and the rotational speed of controlled temperature, fan respectively, adjustable ambient temperature makes the computer work in normal temperature range all the time, improves the performance of computer, prolongs the life-span of computer.

Description

Computer fan speed control and temperature sensing device

technical field

The utility model relates to a computer cooling device, in particular to a computer fan speed induction control device.

Background technique

The central processing unit of a computer is the core part of a computer, and the operation of the central processing unit directly determines the performance of a computer. The operation of the central processing unit of a computer is affected by many factors, among which temperature is an extremely important factor. Too low or too high a temperature will affect the normal operation of the central processing unit. With the continuous development of science and technology, the main frequency of the central processing unit is also increasing, and the heat emitted by the central processing unit itself is also increasing. How to dissipate the heat on the central processing unit was once a problem solved by many technical experts. At the beginning, people installed a radiator on the central processing unit and a fan on the radiator, which greatly improved the heat dissipation of the central processing unit. device effect. However, due to the uncontrollable fan speed and heat dissipation effect, the temperature of the central processing unit may be too low or too high, which greatly affects the normal operation of the central processing unit. Of course, computer motherboards, hard disks, display cards, etc. are also greatly affected by temperature, and how to control the temperature inside the computer is also a concern of people.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the prior art, to provide a computer that can sense the temperature of the central processing unit, main board, hard disk and display card, and control the speed of the fan according to the temperature of the sensed device, so as to ensure the normal operation of the computer. Working computer fan speed control and temperature sensing device.

In order to achieve the above object, the utility model adopts the following technical features:

A computer fan speed control and temperature sensing device, characterized in that the device includes an external temperature sensing circuit, a fan speed sensing input circuit, a fan speed adjustment circuit, a temperature setting selection circuit, a wind speed setting selection circuit, a display and a crystal oscillator The temperature sensing circuit, the fan speed sensing input circuit, the fan speed regulating circuit, the temperature setting selection circuit, the wind speed setting selection circuit, the display and the crystal oscillator are respectively connected with the central processing unit.

The fan speed control sensing device also includes a buzzer and a buzzer driving circuit, and the buzzer is connected to the central processing unit after being connected to the buzzer driving circuit.

The central processing unit at least includes an arithmetic processor, an A/D conversion circuit, a comparison circuit, a temperature detection amplifier circuit, a fan speed detection amplifier circuit, a fan speed detection and adjustment circuit, and a display drive circuit;

An external temperature sensing circuit, a temperature detection amplifier circuit, a comparison circuit, and an A/D conversion circuit are sequentially connected to the arithmetic processor to form a branch circuit for processing and analyzing the ambient temperature;

The fan power supply, the fan speed sensing input circuit, and the fan speed detection amplifier circuit are sequentially connected to the arithmetic processor to form a processing and analysis branch for the fan speed;

The arithmetic processor, the display driving circuit, and the display are sequentially connected to form a temperature and rotational speed display output branch;

The arithmetic processor, the buzzer driving circuit, and the buzzer are sequentially connected to form a buzzer alarm output branch;

The temperature setting selection circuit is connected with the operation processing circuit;

The fan speed setting selection circuit, the arithmetic processor, the fan speed detection and adjustment control circuit, the fan speed adjustment circuit and the fan power supply are connected in sequence;

The comparison circuit is connected with the operation processor.

The fan speed adjustment circuit and the temperature setting selection circuit are both composed of selection matrix buttons and setting matrix buttons.

The three setting matrix buttons of the fan speed regulating circuit are respectively set to high, medium and low speeds, and the three setting matrix buttons of the temperature setting selection circuit are respectively set to 45°C, 55°C and 65°C.

The display is an LCD display, and the temperature display in the format of 00.0 and the fan speed display in the format of 0000 are set on the board.

Due to the adoption of the above structure, the computer fan speed control and temperature sensing device of the present invention senses the temperature of the computer central processing unit, main board, display card or hard disk and the speed of the connected fan through the temperature sensing circuit, and displays the corresponding values. , to send an alarm when the set value is exceeded. People set the alarm temperature according to the specific situation, and adjust the fan speed accordingly, so that the computer can run at a more suitable temperature, improve the performance of the computer, and prolong the life of the computer.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the functional block diagram of fan speed control of the present invention;

Fig. 3 is the functional block diagram of temperature induction control of the utility model;

Fig. 4 is a schematic diagram of the display mode of the display of the present invention;

Fig. 5 is a circuit diagram of an embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Figures 1 to 4, a computer fan speed control and temperature sensing device is characterized in that the device includes an external temperature sensing circuit, a fan speed sensing input circuit, a fan speed adjustment circuit, a temperature setting selection circuit, a wind speed The setting selection circuit, the display and the crystal oscillator; the temperature sensing circuit, the fan speed sensing input circuit, the fan speed regulating circuit, the temperature setting selection circuit, the wind speed setting selection circuit, the display and the crystal oscillator are respectively connected with the central processing unit.

The fan speed control sensing device also includes a buzzer and a buzzer driving circuit, and the buzzer is connected to the central processing unit after being connected to the buzzer driving circuit.

The central processing unit at least includes an arithmetic processor, an A/D conversion circuit, a comparison circuit, a temperature detection amplifier circuit, a fan speed detection amplifier circuit, a fan speed detection and adjustment circuit, and a display drive circuit;

An external temperature sensing circuit, a temperature detection amplifier circuit, a comparison circuit, and an A/D conversion circuit are sequentially connected to the arithmetic processor to form a branch circuit for processing and analyzing the ambient temperature;

The fan power supply, the fan speed sensing input circuit, and the fan speed detection amplifier circuit are sequentially connected to the arithmetic processor to form a processing and analysis branch for the fan speed;

The arithmetic processor, the display driving circuit, and the display are sequentially connected to form a temperature and rotational speed display output branch;

The arithmetic processor, the buzzer driving circuit, and the buzzer are sequentially connected to form a buzzer alarm output branch;

The temperature setting selection circuit is connected with the operation processing circuit;

The fan speed setting selection circuit, the arithmetic processor, the fan speed detection and adjustment control circuit, the fan speed adjustment circuit and the fan power supply are connected in sequence;

The comparison circuit is connected with the operation processor.

The fan speed adjustment circuit and the temperature setting selection circuit are both composed of selection matrix buttons and setting matrix buttons.

The three setting matrix buttons of the fan speed regulating circuit are respectively set to high, medium and low speeds, and the three setting matrix buttons of the temperature setting selection circuit are respectively set to 45°C, 55°C and 65°C.

The display is an LCD display, and the temperature display in the format of 00.0 and the fan speed display in the format of 0000 are set on the board.

When the signal of the external temperature sensing circuit is amplified by the temperature detection amplifier circuit, compared with the set value, and then sent to the operation processor after A/D conversion, the operation processor will display the temperature value on the display through the display drive circuit after analysis and processing. On; when the temperature exceeds the set value, the buzzer will sound an alarm for about 15 seconds. Similarly, the fan speed sensing circuit amplifies the signal through the fan speed amplifying circuit after analyzing the fan power supply, and transmits the signal to the operation processor, and the operation processor displays the corresponding value on the display after analysis. When a fan is improperly connected or not connected, the buzzer will sound an alarm. People can set the alarm temperature according to specific conditions, and then adjust the fan speed to make the ambient temperature in a normal state, improve the performance of the computer, and prolong the life of the computer.

The process of sensing and controlling temperature is as follows:

As shown in Figure 5, the power supply of the circuit is supplied to the entire circuit after the power socket 1 is connected to an external power supply, and the external temperature sensor sends the signal to the pins 39 and 40 of the central processing unit 4 (model STP8008E) through the temperature sensing setting selection circuit 6 , 41 select the input, after the analysis and processing of the corresponding circuit in the central processing unit 4, the displayed value will be output to the display 5 through the pin 10 to the pin 31, and it will be judged logically whether it exceeds the set temperature, and if the judgment result exceeds the set temperature, the bee The buzzer 3 sends an alarm after the buzzer drive circuit 2 sends out the alarm command. The alarm lasts for 15 seconds. If the temperature recovers midway, the alarm will stop automatically or press the select matrix button to stop it. Different groups of temperatures can be selected and displayed through the selection matrix button K1 of the temperature setting selection circuit 7. The utility model can display three groups, and the display range is from 0°C to 100°C. ALM45, ALM55, ALM65 can set alarm temperature as 45℃, 55℃ and 65℃ respectively.

The process of sensing and controlling temperature is as follows:

As shown in Figure 5, after the fan speed sensing circuit 8 analyzes the fan power supply 11, the signal is input from the pins 37 and 38 of the central processing unit (the model is STP8008E), and is analyzed and processed by the corresponding circuit inside the central processing unit (the model is STP8008E). After that, the fan speed value will be displayed on the display. When it is detected that the fan is improperly connected or not connected, the central processing unit 4 will send an alarm command to the buzzer driving circuit 2, and the buzzer 3 will send out an alarm sound. The alarm lasts for 13 seconds, and when it returns to normal in the middle, the alarm will stop automatically or press K2 to stop it. K2 is mainly used to select and display the rotating speeds of different fans, and the utility model can select and display two groups. The three setting matrix buttons FANL, FANM and FANH can control the speed of the fan, which are low, medium and high speed respectively. When it is necessary to change the rotating speed of the fan, send instructions to the CPU pin 47 by selecting FANL, FANM and FANH, and the CPU outputs the command signal through the pin 46 after analyzing and processing, and the voltage of the fan power supply is adjusted by the fan speed regulating circuit 9 Make adjustments to achieve the purpose of changing the fan speed.

The temperature sensing control and the fan speed control of the utility model work cooperatively at the same time. After setting the alarm temperature, when the ambient temperature exceeds the set temperature, that is, after the buzzer sends out an alarm, the fan speed can be adjusted to enhance the heat dissipation effect. To achieve the purpose of returning to normal temperature.

Claims (6)

1, a kind of rotation speed of computer fan control and temperature sensing device is characterized in that: this device comprises that external temperature sensor circuit, fan speed induction input circlult, rotation speed of the fan regulating circuit, temperature are set the selection circuit, wind speed is set and selected circuit, display device and crystal oscillator; Temperature sense circuit, fan speed induction input circlult, rotation speed of the fan regulating circuit, temperature are set and are selected circuit, wind speed setting to select circuit, display device to be connected with central processing unit (CPU) respectively with crystal oscillator.

2, rotation speed of computer fan control according to claim 1 and temperature sensing device, it is characterized in that described rotation speed of the fan control induction installation also comprises buzzer and buzzer drive circuit, buzzer is connected the back and is connected with central processing unit (CPU) with buzzer drive circuit.

3, rotation speed of computer fan control according to claim 1 and 2 and temperature sensing device is characterized in that described central processing unit (CPU) comprises that at least arithmetic processor, A/D change-over circuit, comparison circuit, temperature detection amplification circuit, rotation speed of the fan detect amplification circuit, rotation speed of the fan detects regulating circuit and circuit of display driving;

External temperature sensor circuit, temperature detection amplification circuit, comparison circuit, A/D change-over circuit connect and compose Treatment Analysis branch road to ambient temperature with arithmetic processor successively;

Fan power supply, fan speed induction input circlult, fan speed detect amplification circuit and connect and compose Treatment Analysis branch road to rotation speed of the fan with arithmetic processor successively;

Arithmetic processor and circuit of display driving, display device connect and compose temperature successively and rotating speed shows the output branch road;

Arithmetic processor and buzzer drive circuit, buzzer connect and compose buzzing alarming output branch road successively;

Temperature is set and is selected circuit to be connected with arithmetic processing circuit;

Rotation speed of the fan is set and is selected circuit, arithmetic processor, rotation speed of the fan detection adjusting control circuit, rotation speed of the fan regulating circuit to be connected successively with fan power supply;

Comparison circuit is connected with arithmetic processor.

4, rotation speed of computer fan control according to claim 1 and temperature sensing device is characterized in that described rotation speed of the fan regulating circuit and temperature are set the equal selection matrix button of selection circuit and setting matrix button is formed.

5, rotation speed of computer fan control according to claim 3 and temperature sensing device, three setting matrix buttons that it is characterized in that described rotation speed of the fan regulating circuit are set to high, medium and low speed respectively, and temperature is set three setting matrix buttons selecting circuit and is set to 45 ℃, 55 ℃ and 65 ℃ respectively.

6, rotation speed of computer fan according to claim 1 control and temperature sensing device is characterized in that described display device is a LCD display, and the temperature that the plate face is provided with 00.0 form shows and form is 0000 rotation speed of the fan demonstration.

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