CN201539427U - Temperature control industrial personal computer fan module with alarm - Google Patents

Abstract

The utility model discloses a temperature control industrial personal computer fan module with an alarm. The module adopts a single chip microcomputer as a control center; a single chip microcomputer A/D converter, a pulse width modulator and a single chip microcomputer selector are arranged inside the single chip microcomputer; and the pulse width modulator and the single chip microcomputer selector are designed by adopting C language. A single chip microcomputer control module includes a test circuit, a control circuit and an alarm circuit, wherein the test circuit is formed by a thermistor and the single chip microcomputer A/D converter; the control circuit is formed by the pulse width modulator and a case fan; the alarm circuit is formed by a 74HC151 chip selection integrated chip, a single chip microcomputer external interrupt source, an LED light-emitting diode and a buzzer; and the single chip microcomputer is an eight-bit single chip microcomputer. The temperature control industrial personal computer fan module with the alarm adopts the single chip microcomputer to integrate the functional circuits; most functions are realized inside the single chip microcomputer through the C language; the circuits are simple in design, low in cost and fine in performance; and an alarm device is provided, thereby effectively solving the problem that failure of a cooling fan is not easy to be timely found and providing reliable guarantee for safety running of an industrial control computer.

Description

A kind of temperature control process control machine blower module with warning

Technical field:

The utility model relates to a kind of temperature control process control machine blower module with warning.

Background technique:

The heat dissipating method that in industry spot industrial control computer is generally adopted at present is powerful fan to be set quicken air flows, and the computer thermal source is dispelled the heat.Because of abominable hot environment may appear in the scene, so good industrial computer all adopts windy fan to dispel the heat, can proper functioning in rugged environment to guarantee equipment.The Placement of process control machine and fan has determined that these fans generally just begin to run up when host-initiated at present, just can stop up to shutdown.

Fan connects fan governor, there is no fan failure warning function in fan governor in the past, can only control one or two fan, the shortcoming that the control circuit design is complicated, fault is many, cost is high, efficient is low, time-consuming, and the level of integration of control chip is not high, cause the components and parts of circuit many, many more easy more the going wrong of parts.

As patent publication No. be CN2671226 patent disclosure a kind of intelligent fan controller, it comprises power circuit, microprocessor and speed governing part, described speed governing part is made up of key-press input unit, zero passage observation circuit, controllable silicon Drive and Control Circuit, signal output control controllable silicon by key-press input unit and zero cross detection circuit triggers the angle, changes the voltage of fan electromotor.The circuit complexity of described patent design, the modulation program trouble, electronic parts and components are many, also alarm free function etc. when breaking down easily and breaking down.

The model utility content:

In order to solve the problem that above-mentioned prior art exists, the utility model provides a kind of temperature control process control machine blower module with warning, superior performance, with low cost.

A kind of temperature control process control machine blower module with warning comprises that single-chip microcomputer, single-chip microcomputer exterior interrupt, DC/DC transducer, sheet selected works become electronic parts and components such as chip, triode, diode, LED light emitting diode, thermistor and buzzer.

Further, described single-chip microcomputer is a 8-bit microcontroller, and it is that 74HC151 sheet selected works become chip that described selected works become chip;

Pulse width modulator PWM and single-chip microcomputer selector that described 8-bit microcontroller is built-in with A/D converter and designs by the C language, described pulse width modulator PWM regulates the rotating speed of fan by the output of control single chip computer, and described single-chip microcomputer selector is used to judge which fan breaks down.

Described thermistor is used to detect the temperature of cabinet endogenous pyrogen, and the characteristic that changes resistance with the height of temperature feeds back to described 8-bit microcontroller by the mode of electric current.

Described DC/DC transducer is an electric pressure converter of effectively exporting fixed voltage behind the transformation input voltage;

Described LED light emitting diode by luminous which case fan that is electrically connected with fan governor that shows breaks down;

Described buzzer sends alarm sound at the case fan LED Light-Emitting Diode (LED) that breaks down in luminous.

In the above-mentioned electronic parts and components, described thermistor is arranged in the controller internal circuit, one end of thermistor is connected in the circuit, the other end connects the input end of the built-in A/D converter of described 8-bit microcontroller, the output terminal of described A/D converter connects the input end of the built-in pulse width modulator PWM of described 8-bit microcontroller, the output terminal of described pulse width modulator PWM connects the input end of a plurality of case fans respectively, the output terminal of described a plurality of case fans connects the input end of single-chip microcomputer selector, and the output terminal of described single-chip microcomputer selector connects LED light emitting diode and buzzer respectively by single-chip microcomputer exterior interrupt and I/O port.

Described thermistor and described A/D converter are formed test circuit, and thermistor is gathered temperature signal, and by A/D converter collection result is sent into described 8-bit microcontroller; Described pulse width modulator PWM and fan are formed control circuit, after control circuit receives the signal of the A/D converter in the described test circuit, are controlled the rotating speed of described fan by pulse width modulator PWM; Described 74HC151 sheet selected works become chip, single-chip microcomputer exterior interrupt, LED light emitting diode and buzzer to form warning circuit, utilize 74HC151 sheet selected works to become chip to select the fan that breaks down, enter interrupt handling routine by the single-chip microcomputer exterior interrupt, show that by I/O port controlling LED lumination of light emitting diode which fan breaks down again, simultaneously, buzzer sends alarm sound.

Design method of the present utility model and working principle are summarized as follows:

The characteristic that changes resistance by thermistor with the height of temperature feeds back to 8-bit microcontroller by the mode of electric current, utilize the built-in A/D converter of described 8-bit microcontroller to convert the accessible digital signal of 8-bit microcontroller to, utilize the C language to control the output of 8-bit microcontroller again, finally control the rotating speed of a plurality of fans at 8-bit microcontroller indoor design pulse width modulator PWM.

Malfunction alarm aspect: use sheet to select chip to select the fan that breaks down, sheet selects the input of the output of chip as control core single-chip microcomputer, utilize selector of C language compilation to judge which fan breaks down, show which fan failure by the LED light emitting diode again, and this moment, buzzer sent alarm sound.

The beneficial effects of the utility model are:

1, the utility model control circuit adopts the single-chip microcomputer design, and most of function realizes that by the C language circuit design is simple in single-chip microcomputer, and cost is low, and performance is good.

2, the utility model provides warning device, is difficult for the problem in time found thereby solved preferably when radiation fan breaks down, for the safe operation of industrial computer provides reliable guarantee.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Embodiment:

Further specify the utility model below in conjunction with the drawings and specific embodiments;

Embodiment:

Referring to Fig. 1, a kind of temperature control process control machine blower module with warning comprises that 8-bit microcontroller, single-chip microcomputer exterior interrupt, DC/DC transducer, 74HC151 sheet selected works become chip, triode, diode, LED light emitting diode 6, thermistor 1 and buzzer 7.

The pulse width modulator 3 and 4 that is provided with Chip Microcomputer A/D transducer 2 in the described 8-bit microcontroller and designs by the C language selects 1 selector 5, described pulse width modulator 3 is regulated the rotating speed of fan by the output of control single chip computer, and described 4 select 1 selector 5 to be used to judge which fan breaks down.

One end of thermistor 1 is connected in the main circuit of 8-bit microcontroller, the other end connects the input end of Chip Microcomputer A/D transducer 2, the output terminal of described Chip Microcomputer A/D transducer 2 connects the input end of the built-in pulse width modulator of described 8-bit microcontroller 3, the output terminal of pulse width modulator 3 four case fans 41 that are connected in parallel, 42,43 and 44 input end, the input end of 1 selector 5 is selected in the common connection 4 of the output terminal of described four case fans, and described 4 select the output terminal of 1 selector 5 to connect LED light emitting diode 6 and buzzer 7 respectively by single-chip microcomputer exterior interrupt and I/O port.

Above-mentioned electronic parts and components are formed test circuit, control circuit and the warning circuit of control module of the present utility model respectively, and are as described below:

Test circuit: thermistor 1 is formed test circuit with Chip Microcomputer A/D transducer 2, thermistor 1 is a kind of of temperature transducer, be used to detect the temperature of cabinet endogenous pyrogen, Chip Microcomputer A/2 pairs of analogue signals of D transducer are gathered and the result are sent into 8-bit microcontroller.The test circuit working procedure is: thermistor 1 changes resistance and produces voltage signal along with the variation of temperature height, converts the accessible digital signal of described 8-bit microcontroller to through Chip Microcomputer A/D transducer 2.

Control circuit: described pulse width modulator 3 and four case fans 41,42,43 and 44 are formed control circuits, after control circuit receives the digital signal of the Chip Microcomputer A/D transducer 2 in the described test circuit, the output that comes control single chip computer by the predefined pulse width modulator 3 of C programmer in the single-chip microcomputer, and then finally control the rotating speed of described four case fans.

Warning circuit: 74HC151 sheet selected works become chip, single-chip microcomputer exterior interrupt, LED light emitting diode 6 and buzzer 7 to form warning circuit, 74HC151 sheet selected works become chip to be one eight to select a data selector, it has eight data input end D0-D7,1 gating end S, three data selecting side A, B, C and two output terminal Y, W, as three data selecting side A, when B, C from 000 to 111 changes, can select different passages.Described 74HC151 sheet selected works become the input end of the output terminal of chip as control core single-chip microcomputer, enter interrupt handling routine by the single-chip microcomputer exterior interrupt, demonstrate which fan failure by I/O port controlling LED light emitting diode 6 again, simultaneously, buzzer 7 sends alarm sound.

Design method of the present utility model and working principle are summarized as follows:

The characteristic that changes resistance by thermistor 1 with the height of temperature feeds back to 8-bit microcontroller by the mode of electric current, utilize the built-in Chip Microcomputer A of described 8-bit microcontroller/D transducer 2 to convert the accessible digital signal of 8-bit microcontroller to, utilize the C language to control the output of 8-bit microcontroller again, finally control the rotating speed of a plurality of fans in 8-bit microcontroller indoor design pulse width modulator 3.

Malfunction alarm aspect: use 74HC151 sheet selected works to become chip to select the fan that breaks down, 74HC151 sheet selected works become the input end of the output terminal of chip as control core single-chip microcomputer, enter interrupt handling routine by the single-chip microcomputer exterior interrupt, demonstrate which fan failure by I/O port controlling LED light emitting diode 6 again, and this moment, buzzer 7 sent alarm sound.

A kind of temperature control process control machine blower module in the utility model with warning, utilize pulse width modulator 3, Chip Microcomputer A/D transducer 2, single-chip microcomputer exterior interrupt and 74HC151 sheet selected works to become chip to realize the function that process control machine fan speed-regulating control and fan failure are reported to the police respectively, and all program has all adopted the design of single-chip microcomputer C programmer, thereby simplified circuit design, reduced user cost.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (3)

1. the temperature with warning is controlled the process control machine blower module, it is characterized in that, it adopts single-chip microcomputer as the control core, the pulse width modulator (3) and the single-chip microcomputer selector (5) that are provided with Chip Microcomputer A/D transducer (2) in the described single-chip microcomputer and adopt the C language to design, single-chip microcomputer The whole control module comprises:

By thermistor (1) and test circuit that Chip Microcomputer A/D transducer (2) is formed, the warning circuit that the control circuit that pulse width modulator (3) and case fan (41,42,43,44) are formed, 74HC151 sheet selected works become chip, single-chip microcomputer exterior interrupt, LED light emitting diode (6) and buzzer (7) to form;

One end of described thermistor (1) is connected in the main circuit of single-chip microcomputer, the other end connects the input end of Chip Microcomputer A/D transducer (2), described Chip Microcomputer A/the output terminal of D transducer (2) connects the input end of the built-in pulse width modulator of described 8-bit microcontroller (3), the output terminal of pulse width modulator (3) four case fans (41 that are connected in parallel, 42,43,44) input end, the output terminal of described four case fans connects the input end of single-chip microcomputer selector (5) jointly, and the output terminal of described single-chip microcomputer selector (5) connects LED light emitting diode (6) and buzzer (7) respectively by single-chip microcomputer exterior interrupt and I/O port.

2. a kind of temperature control process control machine blower module with warning according to claim 1, described single-chip microcomputer is a 8-bit microcontroller.

3. a kind of temperature control process control machine blower module according to claim 1 with warning, described 74HC151 sheet selected works become the input end of the output terminal of chip as control core single-chip microcomputer, enter interrupt handling routine by the single-chip microcomputer exterior interrupt, which by the luminous demonstration of I/O port controlling LED light emitting diode (6) fan break down again, simultaneously, buzzer (7) sends alarm sound.

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