CN205318320U

CN205318320U - Novel computer overvoltage protection device

Info

Publication number: CN205318320U
Application number: CN201521104138.2U
Authority: CN
Inventors: 邓田
Original assignee: Nanchang Institute of Technology
Current assignee: Nanchang Institute of Technology
Priority date: 2015-12-29
Filing date: 2015-12-29
Publication date: 2016-06-15
Anticipated expiration: 2025-12-29

Abstract

The utility model provides a novel computer overvoltage protection device, installing whole circuit and compriseing two parts, the branch maybe voltage stabilizing circuit and display circuit, and voltage stabilizing circuit includes that vary voltage, rectification, filtering and steady voltage form, display circuit voltage sensor, amplifier and luminous vocal alarm device is as follows mainly constituteed, and when detecting the excessive pressure, voltage stabilizing circuit carries out the steady voltage protection through the stabilivolt, gives the display circuit with the signal transmission simultaneously to making it give off light through emitting diode and reporting to the police with the warning loudspeaker are vocal, this computer overvoltage protector can detect and protect under the voltage excessive pressure circumstances, reminds and vocal alarm device with giving off light occasionally.

Description

A kind of New-type computer over-pressure safety device

Technical field

This utility model relates to a kind of New-type computer over-pressure safety device, is mainly used in the detection of computer overvoltage, protection and warning, belongs to Computerized intelligent control technology category.

Background technology

At present, a lot of electrical networks or household voltage less stable, it is low that voltage has height to have often, and computer is often burned because of overtension, and serious words can cause fire. Burning out of computer can cause some important data or file in computer to lose, and causes the words of fire that people's property just more can be allowed to incur loss.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of New-type computer over-pressure safety device, and this computer over-pressure safety device to detecting in electric voltage over press situation and can be protected, and has luminous prompting and sounding alarm device simultaneously.

For reaching above-mentioned purpose, this utility model one New-type computer over-pressure safety device, it includes voltage stabilization part and display part;

Described voltage stabilization part circuit is connected as: this circuit first passes around transformator U1, the voltage drop of 220V is become the voltage required for host computer by transformator U1, transformator U1 connects bridge rectifier D1 again, the upper end of transformator U1 connects the 3 foot places of bridge rectifier D1, lower end connects the 4 foot places of bridge rectifier D1, 1 foot place of bridge rectifier D 1 connects the upper end of the electric capacity C1 of 100pF, 2 foot places of bridge rectifier D 1 connect the lower end of the electric capacity C1 of 100pF, the upper end of electric capacity C1 connects the colelctor electrode of the resistance R1 and NPN type triode Q1 that are simultaneously connected with 1K, the other end of resistance R1 is connected with the base stage of NPN type triode Q1, the base stage of audion Q1 is connected with the negative pole of stabilivolt D2, the positive pole of stabilivolt D2 is then connected to 2 foot places of bridge rectifier pipe, the emitter stage of audion Q1 and the positive pole of stabilivolt D2 are as outfan U0,

Described display part parallel circuit is connected as: come from the output signal U 0 of voltage stabilization part circuit through overvoltage sensor MK1, the upper end of voltage sensor MK1 connects the voltage VCC1 of+5V, lower end connects earth terminal GND1, the resistance R3 of adjustable resistance R2 and the 51K of a 10K is connected between power supply VCC1 and ground end GND1, the resistance R4 of 10K is connected between adjustable resistance R2 and resistance R3, resistance R4 is then connected to 3 feet of amplifier U1A, the 2 foot connecting valve S1 of amplifier U1A, switch S1 is connected with ground end GND1 again, 4 feet of amplifier U1A meet the power supply VCC2 of+5V, 11 feet are connected with ground end GND2, 1 foot of amplifier U1A is signal output part, the resistance R5 of outfan and 510 ohm is connected, resistance R5 connects the base stage of NPN type triode Q2, the colelctor electrode of audion Q2 is connected with the power supply VCC3 of+5V, the emitter stage of audion Q2 is connected to the electric capacity C4 of 100uF, the positive terminal of the left end connecting luminous diode LED0 of electric capacity C4, the negative pole end of diode (LED) 0 is connected with ground end GND3, the right-hand member of electric capacity C4 is connected to the upper end of loudspeaker Speaker, the lower end of loudspeaker Speaker is connected with ground end GND4.

This utility model difference from prior art is in that this utility model achieves following technique effect:

After the work of this utility model circuit, once computer overtension be detected, light emitting diode is bright, and sound horn is reported to the police.

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

Accompanying drawing explanation

Fig. 1 is mu balanced circuit figure; In figure, U1: transformator; D1: bridge rectifier; The electric capacity of C1:100uF; The resistance of R1:1K; Q1 (2N3904): NPN type triode; D2: stabilivolt;

Fig. 2 is display circuit figure; In figure, MK1: voltage sensor; The adjustable resistance of R2:10K; The resistance of R3:51K; The resistance of R4:10K; U1A (LM324AD): operational amplifier; The resistance of R5:510 ohm; Q2 (2N3904): NPN type triode; The electric capacity of C4:100uF; LED0: light emitting diode; Speaker: loudspeaker; The power supply of VCC1, VCC2, VCC3:+5V; GND1, GND2, GND3, GND4: ground end;

Fig. 3 is device schematic diagram; In figure, 1: power supply input-output line; 2: bridge rectifier; 3: stabilivolt; 4: loudspeaker; 5: light emitting diode.

Detailed description of the invention

Below in conjunction with drawings and Examples, to this utility model, above-mentioned and other technical characteristic and advantage are described in more detail.

As Figure 1-3, this utility model one New-type computer over-pressure safety device, it includes voltage stabilization part and display part;

Fig. 1 is voltage stabilization part circuit: this circuit first passes around transformator U1, transformator U1 and the voltage drop of 220V is become the voltage required for host computer. Then transformator U1 connects the 3 foot places of the upper end connection bridge rectifier D1 of bridge rectifier D1, transformator U1 again, and lower end connects the 4 foot places of bridge rectifier D1. 1 foot place of bridge rectifier D 1 connects the upper end of the electric capacity C1 of 100pF, and 2 foot places of bridge rectifier D 1 connect the lower end of the electric capacity C1 of 100pF. The upper end of electric capacity C1 connects the colelctor electrode of the resistance R1 and NPN type triode Q1 that are simultaneously connected with 1K, and the other end of resistance R1 is connected with the base stage of NPN type triode Q1. The base stage of audion Q1 is connected with the negative pole of stabilivolt D2, and the positive pole of stabilivolt D2 is then connected to 2 foot places of bridge rectifier pipe. The emitter stage of audion Q1 and the positive pole of stabilivolt D2 are as outfan U0.

Fig. 2 is display part parallel circuit: the output signal U 0 coming from mu balanced circuit connects the voltage VCC1 of+5V through the upper end of overvoltage sensor MK1, voltage sensor MK1, and lower end connects earth terminal GND1. The resistance R3 of adjustable resistance R2 and the 51K of a 10K is connected between power supply VCC1 and ground end GND1. Between adjustable resistance R2 and resistance R3, connect the resistance R4 of 10K, resistance R4 be then connected to 3 feet of amplifier U1A. The 2 foot connecting valve S1 of amplifier U1A, switch S1 is connected with ground end GND1 again. 4 feet of amplifier U1A meet the power supply VCC2 of+5V, and 11 feet are connected with ground end GND2. 1 foot of amplifier U1A is signal output part, and the resistance R5 of outfan and 510 ohm is connected. Resistance R5 connects the base stage of NPN type triode Q2, and the colelctor electrode of audion Q2 is connected with the power supply VCC3 of+5V, and the emitter stage of audion Q2 is connected to the electric capacity C4 of 100uF. The positive terminal of the left end connecting luminous diode LED0 of electric capacity C4, the negative pole end of diode (LED) 0 is connected with ground end GND3. The right-hand member of electric capacity C4 is connected to the upper end of loudspeaker Speaker, and the lower end of loudspeaker Speaker is connected with ground end GND4.

Fig. 3 is device schematic diagram.In figure, 1 place is used for installing power supply input-output line, and 2 go out to place bridge rectifier, and stabilivolt is placed at 3 places, and 4 is the position of loudspeaker, and 5 places are used for placing light emitting diode.

Embodiment 1

Switch S1 closes, and this computer overvoltage crowbar enters duty. Under normal circumstances, the voltage of 220V reduces into after certain voltage device through transformator U1, through bridge rectifier pipe rectification, then filters then through electric capacity C1. Stabilivolt D2 and audion Q1 constitutes mu balanced circuit, and such output voltage is stable, thus display circuit also can't detect the change of voltage, such light emitting diode is not luminous, loudspeaker also not sounding alarm.

Embodiment 2

Switch S1 closes, and this computer overvoltage crowbar enters duty. When output voltage U0 overvoltage being detected, voltage sensor MK1 will detect the change of voltage. The voltage signal detected is smaller, is then passed through the amplification of amplifier U1A, and then through audion Q2, the output electric current of audion makes lumination of light emitting diode, and sound horn is reported to the police.

Embodiment described above is only that preferred implementation of the present utility model is described; not scope of the present utility model is defined; under the premise designing spirit without departing from this utility model; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims are determined.

Claims

1. a New-type computer over-pressure safety device, it is characterised in that: it includes voltage stabilization part and display part;