CN107765831A - A kind of computer, computer power supply and its warning circuit - Google Patents
A kind of computer, computer power supply and its warning circuit Download PDFInfo
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- CN107765831A CN107765831A CN201610685609.6A CN201610685609A CN107765831A CN 107765831 A CN107765831 A CN 107765831A CN 201610685609 A CN201610685609 A CN 201610685609A CN 107765831 A CN107765831 A CN 107765831A
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- 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
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
- G06F1/305—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations in the event of power-supply fluctuations
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- 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
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
Abstract
The invention belongs to field of computer technology, there is provided a kind of computer, computer power supply and its warning circuit.In the present invention, by using the computer power supply warning circuit for including power detection module, input voltage measurement module, processing module and reminding module, so that power detection module detection flows through the electric current of power detection resistance, and power detection voltage is directly proportional to the electric current for flowing through power detection resistance to processing module, power detection voltage according to corresponding to exporting electric current；The voltage that input voltage measurement module exports to rectification unit exports sampled voltage to processing module, sampled voltage after sampling changes with voltage ripple of power network grade ratio；Processing module is according to power detection voltage and the sampled voltage corresponding control information of output to reminding module; so that reminding module exports corresponding prompt message according to control information; the problem of can not detecting power failure reason so as to solve existing computer power supply protection circuit presence, and fault cues can not being sent to user.
Description
Technical field
The invention belongs to field of computer technology, more particularly to a kind of computer, computer power supply and its warning circuit.
Background technology
Computer power supply generally all possesses overpower protection circuit, and overpower-protection circuit is excessive, short-circuit in output loading
Deng power supply primary transform circuit can be closed under unusual condition, power supply is avoided to damage.
At present, Fig. 1 shows the circuit structure of the conventional overpower protection circuit of active computer power supply, as shown in figure 1,
The overpower protection circuit of active computer power supply includes rectification unit a, fuse NTC, electric capacity C1, electric capacity C2, electric capacity C3, electricity
Hinder R1, power detection resistance Rs, diode D1, diode D2, transistor Q, inductance L and control chip IC1.Specifically,
During power work, the main road electric current Is of prime power conversion flows through power detection resistance Rs, and the electric current is in power detection resistance Rs
Both ends produce voltage Vs=Is*Rs, and because voltage Vs is directly proportional to electric current Is, electric current Is is directly proportional to power output, and controls
The Is_sense pins that coremaking piece IC1 possesses defencive function are connected to voltage Vs, therefore, by setting power detection resistance Rs
Resistance, so as to control power supply overpower protection point.When guarantor's voltage inside voltage Vs reaches control chip IC1, control chip
IC1 can close power supply main road drive signal, so as to close power supply, avoid power supply from working long hours in overpower running status, from
And protection power source.
But this traditional design is only capable of realizing single and passive overpower protection function, defencive function once life
Effect, power-off can cause system directly to be delayed machine, and user has no way of failure judgement state and reason：For example, user can not know is
The system machine of delaying is due to the situation that system configuration is unreasonable, power supply damages or be other unexpected abnormalities, and domestic consumer is often to this
Feel simply helpless, can only repeatedly restart or change power supply, can not fundamentally position and solve failure.
In addition, one of the reason for input voltage ripple of power network is also power failure and restarted, traditional calculating is electromechanical
Special circuit of the source without input power network overvoltage/undervoltage, it is only deficient to realize by idle protection circuit control chip start threshold voltage
Press defencive function, circuit theory such as Fig. 2, as shown in Fig. 2 the circuit is that a routing resistance R2, electricity are added on the basis of Fig. 1
Hinder the voltage sampling circuit of R3, resistance R4 and resistance R5 compositions.
Figure it is seen that when this design is only capable of realizing that power network input voltage is less than control chip IC1 startup voltage,
The function of power supply is directly closed, when power network input voltage is too high, not corresponding alarm and defencive function, power supply can continuous firings
Until damage, when power network input voltage is relatively low, but again not as little as control chip IC1 startup voltage when, power supply can also continue
Work, if system load is larger, power supply long-term work under such a lower pressure, its internal Active PFC can make it that
Circuit, PFC inductance, power tube, transformer will bear larger stress, greatly can shorten the power work life-span.
In summary, existing computer power supply protection circuit presence can not detect power failure reason, and can not be right
User sends the problem of fault cues.
The content of the invention
It is an object of the invention to provide a kind of computer power supply warning circuit, it is intended to solves existing computer power supply and protects
Shield circuit presence can not detect power failure reason, and the problem of fault cues can not be sent to user.
The present invention is achieved in that a kind of computer power supply warning circuit, the overpower protection line with computer power supply
Road connects, and the overpower protection circuit includes rectification unit and power detection resistance, the computer power supply warning circuit bag
Include power detection module, input voltage measurement module, processing module and reminding module；
The positive input terminal of the power detection module is connected to the both ends of power detection resistance with negative input end, described
The input of input voltage measurement module is connected to the positive output end of the rectification unit, the output end of the power detection module
It is connected with the power voltage test side of the processing module, output end and the processing module of the input voltage measurement module
The connection of sampled voltage test side, the output end of the processing module is connected with the reminding module；
The power detection module detection flows through the electric current of the power detection resistance, and is exported and corresponded to according to the electric current
Power detection voltage to the processing module, the power detection voltage and flow through the electric current of the power detection resistance into just
Than；The voltage that the input voltage measurement module exports to the rectification unit exports sampled voltage to the place after sampling
Module is managed, the sampled voltage changes with voltage ripple of power network grade ratio；The processing module according to the power detection voltage with
Control information is to the reminding module corresponding to the residing voltage range output of the sampled voltage difference, so that the prompting mould
Root tuber exports corresponding prompt message according to the control information.
Another object of the present invention is to provide a kind of computer power supply, the computer power supply includes overpower protection line
Road and above-mentioned computer power supply warning circuit.
A further object of the present invention, which also resides in, provides a kind of computer, and the computer includes above-mentioned computer power supply.
In the present invention, by using including power detection module, input voltage measurement module, processing module and prompting
The computer power supply warning circuit of module so that power detection module detects the electric current for flowing through power detection resistance, and according to electricity
Power detection voltage is to processing module corresponding to stream output, and power detection voltage is with flowing through the electric current of power detection resistance into just
Than；The voltage that input voltage measurement module exports to rectification unit exports sampled voltage to processing module, sampling after sampling
Voltage changes with voltage ripple of power network grade ratio；The processing module voltage model residing according to power detection voltage and sampled voltage difference
Control information corresponding to output is enclosed to reminding module, so that reminding module exports corresponding prompt message according to control information, is entered
And the working condition of computer power supply is allowed a user knowledge of, and prompt message is issued the user with power failure, so as to solve
Existing computer power supply protection circuit presence can not detect power failure reason, and can not send fault cues to user
The problem of.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the overpower protection circuit of active computer power supply；
Fig. 2 is the electrical block diagram of the overvoltage/undervoltage protection circuit of active computer power supply；
Fig. 3 is the modular structure schematic diagram for the computer power supply warning circuit that one embodiment of the invention is provided；
Fig. 4 is the modular structure schematic diagram for the computer power supply warning circuit that another embodiment of the present invention is provided；
Fig. 5 is the electrical block diagram for the computer power supply warning circuit that one embodiment of the invention is provided.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It is described in detail below in conjunction with realization of the specific accompanying drawing to the present invention：
Fig. 3 shows the modular structure for the computer power supply warning circuit that one embodiment of the invention is provided, for the ease of
Illustrate, illustrate only the part related to the embodiment of the present invention, details are as follows：
As shown in figure 3, the mistake of computer power supply warning circuit 1 provided in an embodiment of the present invention and existing computer power supply
Power protection circuit 2 connects, and the overpower protection circuit 2 is identical with the structure of the computer overpower protection circuit shown in Fig. 1；
In addition, computer power supply warning circuit 1 provided in an embodiment of the present invention includes power detection module 10, input voltage measurement module
11st, processing module 12 and reminding module 13.
Wherein, the positive input terminal of power detection module 10 is connected to the two of power detection resistance Rs with negative input end
End, the input of input voltage measurement module 11 are connected to rectification unit a positive output end, the output end of power detection module 10
It is connected with the power voltage test side of processing module 12, the output end of input voltage measurement module 11 and the sampling of processing module 12
Voltage detecting end is connected, and the output end of processing module 12 is connected with reminding module 13.
Power detection module 10 detects the electric current for flowing through power detection resistance Rs, and power is examined according to corresponding to exporting electric current
It is directly proportional to the electric current for flowing through power detection resistance Rs to processing module 12, power detection voltage to survey voltage；Input voltage measurement
Module 11 exports sampled voltage to processing module 12, sampled voltage and power network after being sampled to the rectification unit a voltages exported
Voltage pulsation etc. is than change；The voltage range output pair residing according to power detection voltage and sampled voltage difference of processing module 12
The control information answered is to reminding module 13, so that reminding module 13 exports corresponding prompt message according to control information.
It should be noted that in the present embodiment, residing voltage range is respectively for power detection voltage and sampled voltage
It is arranged as required to by user, and different voltage ranges corresponds to different control information；When processing module receives work(
After rate detects voltage and sampled voltage, it is first determined the power detection voltage voltage range residing with sampled voltage difference, then will
Control information corresponding with the voltage range residing for sampled voltage with power detection voltage is exported to reminding module 13.
Specifically, because power detection resistance Rs is connected on computer power supply main flow loop, therefore, power inspection is flowed through
Measuring resistance Rs electric current is the main road electric current of computer power supply output, and the voltage at power detection resistance Rs both ends is the master
The resistance product of road electric current and power detection resistance Rs, the i.e. voltage at power detection resistance Rs both ends are with main road electric current into just
Than and because the voltage at power detection resistance Rs both ends is directly proportional to power output, therefore, power detection module 10 is according to flowing through
The power detection voltage that power detection resistance Rs electric current obtains can characterize power output size.And when computer power supply exists
Output loading is excessive, when causing the increase of main road electric current under the abnormal conditions such as short-circuit, and the voltage at power detection resistance Rs both ends is corresponding
Increase, i.e., the power detection voltage that power detection module 10 exports accordingly increases, and then shows the output work of computer power supply
Rate is excessive, so that processing module 12 judges the power output of current computer power supply according to different power detection voltages,
And the voltage range according to residing for different power detection voltages exports corresponding control information to reminding module 13, so that prompting
Module 13 sends corresponding prompt message, and then allows a user knowledge of the working condition of computer power supply, and in power failure
Issue the user with fault cues information.
Furthermore because input voltage measurement module 11 is that rectification unit a output voltage is sampled, and then exports and adopt
Sample voltage is to processing module 12, and therefore, when the voltage of rectification unit a outputs is too high due to voltage ripple of power network, input is electric
The sampled voltage that pressure detection module 11 exports accordingly increases, i.e., the sampled voltage that input voltage measurement module 11 exports and power network electricity
Pressure fluctuation etc. is than change；When processing module 12 receives the sampled voltage of the output of input voltage measurement module 11, it may be determined that should
Pre-set interval residing for sampled voltage, and current input power network fluctuation is determined according to different sections, and according to different samplings
Voltage range residing for voltage exports corresponding control information to reminding module 13, so that reminding module 13 sends corresponding prompting
Information, and then the working condition of computer power supply is allowed a user knowledge of, and issue the user with prompt message in power failure.
In the present embodiment, by using including power detection module 10, input voltage measurement module 11, processing module 12
And the computer power supply warning circuit 1 of reminding module 13 so that the detection of power detection module 10 flows through power detection resistance Rs
Electric current, and power detection voltage to processing module 12, power detection voltage and flows through power inspection according to corresponding to exporting electric current
Measuring resistance Rs electric current is directly proportional；Input voltage measurement module 11 is exported after being sampled to the rectification unit a voltages exported and adopted
Sample voltage to processing module 12, sampled voltage changes with voltage ripple of power network grade ratio；Processing module 12 determines power detection voltage
The residing pre-set interval with sampled voltage difference, and control information corresponding to pre-set interval is obtained to reminding module 13, so as to carry
Show that module 13 exports corresponding prompt message according to control information, and then allow a user knowledge of the working condition of computer power supply,
And prompt message is issued the user with power failure, it can not be examined so as to solve existing computer power supply protection circuit presence
The problem of measuring power failure reason, and fault cues can not being sent to user.
Further, as a preferred embodiment of the present invention, as shown in figure 4, power detection module 10 includes amplifying unit
100 with output unit 101.
Wherein, the first input end of amplifying unit 100 is the positive input terminal of power detection module 10, amplifying unit 100
Second input is the negative input end of power detection module 10, the output end of amplifying unit 100 and the input of output unit 101
Connection, the output end of output unit 101 are the output end of power detection module 10.
Amplifying unit 100 detects the electric current for flowing through power detection resistance, and the power detection electricity according to corresponding to exporting electric current
Pressure, and exported after power detection voltage is amplified into processing to output unit 101, so that output unit 101 is by after amplification
Power detection voltage is exported to processing module 12.
Specifically, in the present embodiment, due to power detection resistance Rs resistance very little, and then cause power detection resistance
Voltage on Rs can be than relatively low, therefore, and amplifying unit 100 is to needing to be amplified place to the voltage on power detection resistance Rs
Reason, in order to which processing module 12 is determined to power detection voltage；It should be noted that, although amplifying unit 100 is to power
Voltage on detection resistance Rs is exaggerated processing, but due to the voltage on power detection resistance Rs and main road electric current
It is directly proportional into, power output, therefore the amplifying unit 100 in power detection module 10 is according to flowing through power detection resistance Rs's
The power detection voltage that electric current obtains can equally characterize power output size.
Further, as a preferred embodiment of the present invention, as shown in figure 5, amplifying unit 100 includes operational amplifier
U1, the first filter capacitor C11, the first filter resistance R11, the second filter capacitor C12, the second filter resistance R12, the first electric capacity C13、
Second electric capacity C14And first resistor R13。
Wherein, operational amplifier U1 normal phase input end and the first filter resistance R11First end and the first filter capacitor
C11First end connect altogether, the first filter resistance R11The second end be amplifying unit 100 first input end；Operational amplifier U1
Negative-phase input and the second filter resistance R12First end, the second filter capacitor C12The second end, first resistor R11First
End and the first electric capacity C11First end connect altogether, the second filter resistance R12The second end for amplifying unit 100 second input
End；Operational amplifier U1 output end and first resistor R13The second end and the first electric capacity C13The second end connect to be formed altogether and put
The output end of big unit 100；Operational amplifier U1 Input voltage terminal and the second electric capacity C14First end connection, and receive work
Voltage, the second electric capacity C14The second end and the first filter capacitor C11The second end and the second filter capacitor C12The second end be total to
It is connected to ground；It should be noted that in the present embodiment, the operating voltage that operational amplifier U1 input terminal voltage receives is 3V；
First filter capacitor C11, the first filter resistance R11, the second filter capacitor C12, the second filter resistance R12The power detected is examined
Survey voltage is filtered and delay disposal, to lift the accuracy of detected power detection voltage.
In addition, amplifying unit 100 also includes resistance R14, resistance R14First end and the second filter capacitor C12The second end
Connection, resistance R14The second end ground connection.
Further, as a preferred embodiment of the present invention, as shown in figure 5, output unit 101 includes voltage follower
U2, second resistance R15And 3rd resistor R16。
Voltage follower U2 normal phase input end and second resistance R15The second end connection, second resistance R15First end
For the input of output unit 101, voltage follower U2 negative-phase input and voltage follower U2 output end and the 3rd
Resistance R16First end connect altogether, 3rd resistor R16The second end be output unit 101 output end.
Further, as a preferred embodiment of the present invention, as shown in figure 5, input voltage measurement module 11 includes first
Sampling resistor R17, the second sampling resistor R18, the 3rd sampling resistor R19, the 4th sampling resistor R20, the 5th sampling resistor R21And
3rd filter capacitor C15。
Wherein, the first sampling resistor R17First end be input voltage measurement module 11 input, the first sampling resistor
R17The second end and the second sampling resistor R18First end connection, the second sampling resistor18The second end and the 3rd sampling resistor R19
First end connection, the 3rd sampling resistor R19The second end and the 4th sampling resistor R20First end connection, the 4th sampling resistor
R20The second end and the 5th sampling resistor R21First end and the 3rd filter capacitor C15First end connect to form input voltage altogether
The output end of detection module 11, the 5th sampling resistor R21The second end and the 3rd filter capacitor C15The second end be connected to ground altogether；
In the present embodiment, the 3rd filter capacitor C15Spike and noise caused by power network interference can be eliminated, and then ensures input voltage measurement
The accuracy for the sampled voltage that the sampling of module 11 obtains
Further, as a preferred embodiment of the present invention, as shown in figure 5, processing module 12 is single-chip microcomputer, it is preferred that
The model MC97F1104SM of the single-chip microcomputer.Wherein, single-chip microcomputer MC97F1104SM pin 7 is the power of processing module 12
Voltage detecting end, single-chip microcomputer MC97F1104SM pin 8 are the sampled voltage test side of processing module 11, the single-chip microcomputer
MC97F1104SM pin 6 is the output end of processing module 11, and single-chip microcomputer MC97F1104SM pin 1 is processing module 11
Voltage input end, it receives operating voltage, and the operating voltage is preferably 3.3V, and single-chip microcomputer MC97F1104SM's connects
Ground terminal is ground connection.
Further, as a preferred embodiment of the present invention, as shown in figure 5, reminding module 13 includes buzzer U3, the 4th
Resistance R22, the 5th resistance R23And switch element Q1.
Wherein, buzzer U3 anode passes through the 5th resistance R23Receive external voltage, buzzer U3 negative terminal and switch member
Part Q1 input connection, switch element Q1 output head grounding, switch element Q1 control terminal and the 4th resistance R22Second
End connection, the 4th resistance R22First end be connected with the output end of processing module 12.
Below to computer power supply warning circuit 1 provided in an embodiment of the present invention by taking the circuit structure shown in Fig. 5 as an example
Operation principle illustrates, and details are as follows：
When computer is started working, operational amplifier U1 detects to the electric current for flowing through power detection resistance Rs, and
Sent after processing is amplified to the power detection voltage on power detection resistance Rs to voltage follower U2, voltage follower U2
The power detection voltage after amplification is sent to single-chip microcomputer MC97F1104SM, so that single-chip microcomputer MC97F1104SM determines the mistake
Pre-set interval where power detection voltage, and obtain control information control buzzer U3 corresponding to pre-set interval and send accordingly
Prompting.
For example, when single-chip microcomputer MC97F1104SM determines that the power detection voltage is higher than 2.2V, then show current computer
The power output of power supply is higher than 110% nominal load, i.e. current computer power supply super high power is run, if long-term work will cause
Computer power supply is damaged, it is necessary to reduce system load, and now, single-chip microcomputer MC97F1104SM sends the first control information control honeybee
The device U3 that rings yowls, and yowl frequency is 1Hz；When single-chip microcomputer MC97F1104SM determines the power detection voltage higher than 2.0V and low
When 2.2V, then show that the power output of current computer power supply reaches 100% nominal load, i.e. current computer power supply is completely negative
Lotus runs, it is necessary to which strengthening system radiating or reduction load, now, single-chip microcomputer MC97F1104SM sends the second control information control
Buzzer processed carries out early warning in 30 seconds, i.e. buzzer U3 sent 15 sound in 30 seconds and piped, and the frequency that pipes is 1Hz；Work as monolithic
When machine MC97F1104SM determines the power detection voltage higher than 1.6V and is less than 1.8V, then show the defeated of current computer power supply
Go out power and reach 80% nominal load, the i.e. heavy-duty service of current computer power supply, now, single-chip microcomputer MC97F1104SM is sent
3rd control information control buzzer U3 carries out early warning in 10 seconds, i.e. buzzer U3 sent 5 sound in 10 seconds and piped, and the frequency that pipes
Rate is 1Hz, with this working condition to reminding user's current computer power supply.
It should be noted that in the present embodiment, work(that single-chip microcomputer MC97F1104SM power voltage test side receives
Rate detection voltage meets 0~3.3V of monolithic machine testing pin reference voltage detection, and power detection voltage within the range can
To characterize the size of computer power supply power output.
Further, when computer is started working, the first sampling resistor R17, the second sampling resistor R18, the 3rd sampling electricity
Hinder R19, the 4th sampling resistor R20And the 5th sampling resistor R21The voltage of rectification unit a outputs is sampled, and will sampling
Voltage is sent to single-chip microcomputer MC97F1104SM, so that single-chip microcomputer MC97F1104SM determines the preset areas where the sampled voltage
Between, and obtain control information control buzzer U3 corresponding to pre-set interval and send corresponding prompting.
For example, when single-chip microcomputer MC97F1104SM determines that the sampled voltage is higher than 3.0V, then show current computer power supply
Work input voltage be higher than 280V, i.e., the environment power network of current computer power work is abnormal, after causing rectification unit a rectifications
Input voltage it is extremely high, now need to shut down computer immediately, and carry out failture evacuation, now single-chip microcomputer MC97F1104SM
The 4th control information control buzzer U3 is sent to yowl；When single-chip microcomputer MC97F1104SM determines that the sampled voltage is less than 0.1V,
Then show that the operating voltage of current computer power supply is less than 140V, i.e. current computer power supply ultra low voltage is run, if computer
Power supply long-term work then easily causes computer power supply to damage in the case of ultra low voltage, now need reduce system load or
Person detects grid condition, and now single-chip microcomputer MC97F1104SM sends the 5th control information control buzzer U3 and sent in 10 seconds
10 sound pipe, i.e. pipe for mono- second duration for once, piping every time of buzzer U3 is 0.5 second.
It should be noted that in the present embodiment, what single-chip microcomputer MC97F1104SM sampled voltage test side received adopts
Sample voltage meets 0~3.3V of monolithic machine testing pin reference voltage detection, and sampled voltage within the range can characterize electricity
Net the situation of fluctuation.
It is worth noting that, in the present embodiment, above-mentioned single-chip microcomputer MC97F1104SM examines according to the different capacity detected
Survey voltage and sampled voltage and control buzzer U3 to send corresponding pipe and be merely illustrative, it is not limited thereto；
In addition, the control information priority level highest sent when single-chip microcomputer MC97F1104SM detects voltage ripple of power network exception,
And the priority level of the control information sent during other situations can need to set according to user；Furthermore single-chip microcomputer
MC97F1104SM is designed using Intelligent programmable, and it can believe according to the control of self-defined more than 1,000 kinds different of Programmings
Pipe time and the frequency that pipes of number control buzzer, and then characterize the different working condition of computer power supply.
In the present embodiment, computer power supply warning circuit passes through single-chip microcomputer MC97F1104SM while monitor and detection power supply
Power output and input power network fluctuation situation, and for the different sound of different monitoring data control buzzer U3 generations come
Computer user is notified, i.e., computer power supply warning circuit 1 provided in an embodiment of the present invention can accurately detect computer power supply
Power output and the fluctuation situation for inputting power network, and user is informed by buzzer U3, so that user is done by alarm status
Go out corresponding adjustment, avoid computer power supply burst from delaying machine and damage, significantly enhance computer power supply and transport under circumstances
Capable reliability, and solve existing computer power supply protection circuit presence and can not detect power failure reason, and nothing
The problem of method sends fault cues to user.
Further, the embodiment of the present invention additionally provides a kind of computer power supply, and the computer power supply includes as shown in Figure 1
Computer power supply overpower protection circuit 2 and computer power supply warning circuit 1 provided in an embodiment of the present invention, and Fig. 1 institutes
The computer power supply overpower protection circuit 2 shown is prior art, and its concrete principle repeats no more；Further, since the present invention is real
The operation principle for applying the computer power supply warning circuit 1 that example is provided refers to Fig. 3 to Fig. 5 detailed description, therefore, herein also
Repeat no more.
In the present embodiment, the basis that computer power supply passes through the overpower protection circuit 2 in existing computer power supply
Upper increase computer power supply warning circuit 1 provided in an embodiment of the present invention so that computer power supply warning circuit 1 can make user
The working condition of computer power supply is understood in time, so as to avoid the damage of computer power supply, improves the use of computer power supply
Life-span；In addition, in computer power supply power supply occurs for the computer power supply warning circuit 1 in the computer power supply that the present embodiment provides
Fault cues information is issued the user with during failure, so that user fundamentally positions and solves failure.
Further, the embodiment of the present invention additionally provides a kind of computer, and the computer includes above-mentioned computer power supply.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (9)
1. a kind of computer power supply warning circuit, the overpower protection connection with computer power supply, the overpower protection
Circuit includes rectification unit and power detection resistance, it is characterised in that the computer power supply warning circuit includes power detection
Module, input voltage measurement module, processing module and reminding module；
The positive input terminal of the power detection module is connected to the both ends of power detection resistance, the input with negative input end
The input of voltage detection module is connected to the positive output end of the rectification unit, the output end of the power detection module and institute
State the power voltage test side connection of processing module, the output end of the input voltage measurement module and adopting for the processing module
Sample voltage detecting end is connected, and the output end of the processing module is connected with the reminding module；
The power detection module detection flows through the electric current of the power detection resistance, and the work(according to corresponding to electric current output
Rate detection voltage is directly proportional to the electric current for flowing through the power detection resistance to the processing module, the power detection voltage；
The voltage that the input voltage measurement module exports to the rectification unit exports sampled voltage to the processing after sampling
Module, the sampled voltage change with voltage ripple of power network grade ratio；The processing module is according to the power detection voltage and institute
Stating sampled voltage, control information is to the reminding module corresponding to residing voltage range output respectively, so that the reminding module
Corresponding prompt message is exported according to the control information.
2. computer power supply warning circuit according to claim 1, it is characterised in that the power detection module includes putting
Big unit and output unit；
The first input end of the amplifying unit is the positive input terminal of the power detection module, and the second of the amplifying unit is defeated
Enter negative input end of the end for the power detection module, the output end of the amplifying unit and the input of the output unit connect
Connect, the output end of the output unit is the output end of the power detection module；
The amplifying unit detection flows through the electric current of the power detection resistance, and the power inspection according to corresponding to electric current output
Voltage is surveyed, and is exported after the power detection voltage is amplified into processing to the output unit, so that the output unit
Power detection voltage after amplification is exported to the processing module.
3. computer power supply warning circuit according to claim 2, it is characterised in that the amplifying unit is put including computing
Big device, the first filter capacitor, the first filter resistance, the second filter capacitor, the second filter resistance, the first electric capacity, the second electric capacity with
And first resistor；
First end and first filter capacitor of the normal phase input end of the operational amplifier with first filter resistance
First end connect altogether, the second end of first filter resistance is the first input end of the amplifying unit；The operation amplifier
The negative-phase input of device and the first end of second filter resistance, the second end of second filter capacitor, first electricity
The first end of resistance and the first end of first electric capacity connect altogether, and the second end of second filter resistance is the amplifying unit
The second input；The of second end of the output end of the operational amplifier and the first resistor and first electric capacity
Two ends connect the output end to form the amplifying unit altogether；The of the Input voltage terminal of the operational amplifier and second electric capacity
One end connects, and receives operating voltage, second end and institute of the second end of second electric capacity with first filter capacitor
The second end for stating the second filter capacitor is connected to ground altogether.
4. computer power supply warning circuit according to claim 2, it is characterised in that the output unit include voltage with
With device, second resistance and 3rd resistor；
The normal phase input end of the voltage follower is connected with the second end of the second resistance, the first end of the second resistance
For the input of the output unit, the output end of the negative-phase input of the voltage follower and the voltage follower and
The first end of the 3rd resistor connects altogether, and the second end of the 3rd resistor is the output end of the output unit.
5. computer power supply warning circuit according to claim 1, it is characterised in that the input voltage measurement module bag
Include the first sampling resistor, the second sampling resistor, the 3rd sampling resistor, the 4th sampling resistor, the 5th sampling resistor and the 3rd filter
Ripple electric capacity；
The first end of first sampling resistor is the input of the input voltage measurement module, first sampling resistor
Second end is connected with the first end of second sampling resistor, the second end of second sampling resistor and the described 3rd sampling electricity
The first end connection of resistance, the second end of the 3rd sampling resistor is connected with the first end of the 4th sampling resistor, and described the
Second end of four sampling resistors connects altogether with the first end of the 5th sampling resistor and the first end of the 3rd filter capacitor
Form the output end of the input voltage measurement module, the second end and the 3rd filter capacitor of the 5th sampling resistor
Second end is connected to ground altogether.
6. computer power supply warning circuit according to claim 1, it is characterised in that the processing module is single-chip microcomputer.
7. computer power supply warning circuit according to claim 1, it is characterised in that the reminding module includes buzzing
Device, the 4th resistance, the 5th resistance and switch element；
The anode of the buzzer receives external voltage, the negative terminal of the buzzer and the switch member by the 5th resistance
The input connection of part, the output head grounding of the switch element, the control terminal of the switch element and the 4th resistance
Second end is connected, and the first end of the 4th resistance is connected with the output end of the processing module.
8. a kind of computer power supply, including overpower protection circuit, it is characterised in that the computer power supply also includes such as right
It is required that the computer power supply warning circuit described in 1 to 7 any one.
9. a kind of computer, it is characterised in that the computer includes computer power supply as claimed in claim 8.
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| CN201610685609.6A CN107765831A (en) | 2016-08-18 | 2016-08-18 | A kind of computer, computer power supply and its warning circuit |
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| CN201610685609.6A CN107765831A (en) | 2016-08-18 | 2016-08-18 | A kind of computer, computer power supply and its warning circuit |
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| CN107765831A true CN107765831A (en) | 2018-03-06 |
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