CN108196109A - A kind of circuit for being used to monitor supply voltage - Google Patents
A kind of circuit for being used to monitor supply voltage Download PDFInfo
- Publication number
- CN108196109A CN108196109A CN201810218763.1A CN201810218763A CN108196109A CN 108196109 A CN108196109 A CN 108196109A CN 201810218763 A CN201810218763 A CN 201810218763A CN 108196109 A CN108196109 A CN 108196109A
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- resistance
- diode
- voltage
- transistor
- grounded
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
Abstract
The present invention relates to a kind of for monitoring the circuit of supply voltage,The cathode ground connection of voltmeter V1 in circuit,The anode of voltmeter is through resistance R1 connecting resistances R2,Resistance R2 is grounded,Resistance R1 connects the collector of transistor Q2 through diode D7,Resistance R1 connects the collector of transistor Q3 through diode D8 simultaneously,Resistance R1 is grounded through capacitance C2,Diode D4 is met through diode D11,Diode D4 connects the base stage of transistor Q1,Diode D4 is grounded through capacitance C4,The emitter ground connection of transistor Q1,The anode of voltmeter V1 is through voltage R7 sending and receiving optical diodes LED1,Light-emitting diode LED 1 connects the collector of transistor Q1,The anode of voltmeter V1 is through resistance R3 connecting resistances R4,Resistance R4 is grounded,Resistance R3 meets diode D8 through diode D9,Resistance R3 is grounded through capacitance C2,This circuit has the function of under-voltage and over-pressed prompting,And prompt voltage status to host computer,Convenient for the output of PC control instrument.
Description
Technical field
The present invention relates to detection circuit field more particularly to a kind of circuits for being used to monitor supply voltage.
Background technology
It is well known that no matter for any electronic equipment, power supply is all indispensable important component, and technology refers to
Mark and security reliability are directly influenced by power source performance is good and bad.In circuit, each device has its electricity that normally works
Pressure, especially high-power main power supply system, a relatively slow time can all be needed by reaching expection voltage, not reached in voltage
During to expected voltage, i.e., in under-voltage condition.If similary operating voltage has exceeded this range and is in superpressure state, circuit
It is likely to very big error occur, and more seriously device is it is possible that be burned out, such circuit also just fails, therefore
Either for the device in circuit or circuit, the Detection ＆ Controling of operating voltage just seem extremely important.
Invention content
The purpose of the present invention is to provide a kind of for monitoring the circuit of supply voltage, to solve above-mentioned technical problem, it is
Realize that the above-mentioned purpose present invention uses following technical scheme：
It is a kind of for monitoring the circuit of supply voltage, the cathode ground connection of voltmeter V1 in circuit, the anode of voltmeter is through resistance R1
Connecting resistance R2, resistance R2 are grounded, and resistance R1 connects the collector of transistor Q2 through diode D7, while resistance R1 connects through diode D8
The collector of transistor Q3, resistance R1 are grounded through capacitance C2, meet diode D4 through voltage-stabiliser tube D11, diode D4 meets transistor Q1
Base stage, diode D4 is grounded through capacitance C4, and the emitter of transistor Q1 ground connection, the anode of voltmeter V1 is through voltage R7 sending and receiving light
Diode (LED) 1, Light-emitting diode LED 1 connect the collector of transistor Q1, and the anode of voltmeter V1 is through resistance R3 connecting resistance R4, electricity
R4 ground connection is hindered, resistance R3 meets diode D8 through diode D9, and resistance R3 is grounded through capacitance C2, and resistance R3 connects two poles through voltage-stabiliser tube D2
Pipe D5, diode D5 connect the base stage of transistor Q2, while diode D5 is grounded through capacitance C5, and the anode of voltmeter V1 is through resistance R8
Sending and receiving light LED2 connects the collector of transistor Q2, the emitter ground connection of transistor Q2, and the anode of voltmeter V1 connects electricity through resistance R5
R6 is hindered, while resistance R5 is grounded through capacitance C3, resistance R5 meets diode D6 through voltage-stabiliser tube D3, and diode D6 connects the base of transistor Q3
Pole, while diode D6 is grounded through capacitance C6, the anode of voltmeter V1 is through resistance R9 sending and receiving optical diode LED3, light emitting diode
LED3 connects the collector of transistor Q3, the emitter ground connection of transistor Q3.
The characteristics of present invention designs a kind of for monitoring the circuit of supply voltage, and reliability is high, convenient for safeguarding, intuitively
Show supply voltage working condition, detect main power power-supply in real time, the working condition of Primary Component power supply avoids equipment and instrument
It is damaged in improper operating at voltages.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Fig. 2 is simulation result figure of the present invention according to circuit.
Specific embodiment
The present invention is further elaborated in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of for monitoring the circuit of supply voltage, the cathode ground connection of voltmeter V1, voltmeter in circuit
Anode be grounded through resistance R1 connecting resistance R2, resistance R2, resistance R1 connects the collector of transistor Q2, while resistance through diode D7
R1 connects the collector of transistor Q3 through diode D8, and resistance R1 is grounded through capacitance C1, and diode D4, two poles are connect through voltage-stabiliser tube D11
Pipe D4 connects the base stage of transistor Q1, and diode D4 is grounded through capacitance C4, the emitter ground connection of transistor Q1, the anode of voltmeter V1
Through voltage R7 sending and receiving optical diode LED1, Light-emitting diode LED 1 connects the collector of transistor Q1, and the anode of voltmeter V1 is through electricity
R3 connecting resistance R4, resistance R4 ground connection is hindered, resistance R3 meets diode D8 through diode D9, and resistance R3 is grounded through capacitance C2, resistance R3
Diode D5 is met through voltage-stabiliser tube D2, diode D5 connects the base stage of transistor Q2, while diode D5 is grounded through capacitance C5, voltmeter
The anode of V1 connects the collector of transistor Q2 through resistance R8 sending and receiving light LED2, and the emitter of transistor Q2 is grounded, voltmeter V1's
Anode is through resistance R5 connecting resistance R6, while resistance R5 is grounded through capacitance C3, and resistance R5 connects diode D6, diode through voltage-stabiliser tube D3
D6 connects the base stage of transistor Q3, while diode D6 is grounded through capacitance C6, and the anode of voltmeter V1 connects light-emitting diodes through resistance R9
Pipe LED3, Light-emitting diode LED 3 connect the collector of transistor Q3, the emitter ground connection of transistor Q3.
R5 and R6 divides V1, and when the voltage of V1 is more than 46.57V, partial pressure value is more than 3.3+0.7 at the node of R5 and R6
During+0.7=4.7V, the conducting of D3 reverse breakdowns, and then the C-E grades conducting of Q3, LED3 conductings shine, while D7, D8, D9 are positive
At conducting, R1 and R2 nodes, the voltage at the node of R3 and R4 is pulled to 1.7V or so, and D11, D2 is caused to be unable to reverse breakdown
Conducting, the C-E grades cut-off of Q1, LED1 do not shine, and the C-E grades cut-off of Q2, LED2 does not shine；
By adjusting R1, R2, R3, R4, R5, the partial pressure of R6, D11, D2, the voltage-stabiliser tube voltage value of D3 can detect master in real time
The voltage of power power-supply and each chip power supply voltage, and by Q1, the C grade potential states of Q2, Q3 are sent to host computer, it is possible in real time
Detecting power supply status, for host computer intelligence control power supply output foundation is provided.This circuit has under-voltage and over-pressed prompting
Function, and voltage status is prompted to host computer, convenient for the output of PC control instrument.
As shown in Fig. 2, trace specification：A tracks：Supply voltage；C tracks：The junction of under-voltage signal, LED1 and Q1, electricity
Pressure is that zero expression LED1 lamps are bright, and can transmit low level signal to host computer；
D tracks：The junction of normal voltage signal, LED2 and Q2, voltage are that zero expression LED2 lamps are bright, and can be passed to host computer
Send low level signal；
B tracks：The junction of over-pressed signal, LED3 and Q3, voltage are that zero expression LED3 lamps are bright, and can be transmitted to host computer low
Level signal；
The present invention design it is a kind of for monitor supply voltage circuit operation when, work as supply voltage（A tracks）Reach 21.24v
When, the junction of under-voltage signaling point, i.e. LED1 and Q1, voltage is down to 0 V, that is, shows that LED1 lamps are bright, while is transmitted to host computer
Low level signal, D tracks（Normal voltage）With B tracks（Over-pressed signal）Display is high level, shows that LED2, LED3 are not sent out
Light, normal voltage signal and over-pressed signal all transmit high level signal to host computer；
When supply voltage reaches 33.24v, the junction of normal voltage signaling point, i.e. LED2 and Q2, voltage is down to 0 V, i.e. table
Bright LED2 lamps are bright, while transmit low level signal, C tracks to host computer（Under-voltage signal）With B tracks（Over-pressed signal）Display is equal
For high level, show that LED1, LED3 do not shine, under-voltage signal and over-pressed signal all transmit high level signal to host computer；
When supply voltage reaches 43.92v, the junction of over-pressed signaling point, i.e. LED3 and Q3, voltage is down to 0 V, that is, shows
LED3 lamps are bright, while transmit low level signal, C tracks to host computer（Under-voltage signal）With D tracks（Normal voltage）Display is
High level shows that LED1, LED2 do not shine, and under-voltage signal and normal voltage signal all transmit high level signal to host computer；
Whether host computer is normal with the power work that may determine that main power source or Primary Component according to different level signals；Into
And the working condition of slave computer can be prejudged in advance.
The above is present pre-ferred embodiments, for the ordinary skill in the art, according to the present invention
Introduction, in the case where not departing from the principle of the present invention and spirit, the changes, modifications, replacement and the change that are carried out to embodiment
Type is still fallen within protection scope of the present invention.
Claims (2)
1. a kind of circuit for being used to monitor supply voltage, which is characterized in that the cathode ground connection of voltmeter V1 in circuit, voltmeter
Anode is grounded through resistance R1 connecting resistance R2, resistance R2, and resistance R1 meets the collector of transistor Q2, while resistance R1 through diode D7
The collector of transistor Q3 is connect through diode D8, resistance R1 is grounded through capacitance C2, and diode D4, diode are connect through voltage-stabiliser tube D11
D4 connects the base stage of transistor Q1, and diode D4 is grounded through capacitance C4, the emitter ground connection of transistor Q1, the anode warp of voltmeter V1
Voltage R7 sending and receiving optical diode LED1, Light-emitting diode LED 1 connect the collector of transistor Q1, and the anode of voltmeter V1 is through resistance
R3 connecting resistance R4, resistance R4 ground connection, resistance R3 meet diode D8 through diode D9, and resistance R3 is grounded through capacitance C2, resistance R3 warps
Voltage-stabiliser tube D2 meets diode D5, and diode D5 connects the base stage of transistor Q2, while diode D5 is grounded through capacitance C5, voltmeter V1
Anode the collector of transistor Q2 is connect through resistance R8 sending and receiving light LED2, the emitter ground connection of transistor Q2, voltmeter V1 is just
Pole is through resistance R5 connecting resistance R6, while resistance R5 is grounded through capacitance C3, and resistance R5 meets diode D6, diode D6 through voltage-stabiliser tube D3
The base stage of transistor Q3 is connect, while diode D6 is grounded through capacitance C6, the anode of voltmeter V1 is through resistance R9 sending and receiving optical diodes
LED3, Light-emitting diode LED 3 connect the collector of transistor Q3, the emitter ground connection of transistor Q3.
2. a kind of circuit for being used to monitor supply voltage according to claim 1, which is characterized in that for monitoring power supply electricity
During the circuit operation of pressure, when supply voltage reaches 21.24v, the junction of under-voltage signaling point, i.e. LED1 and Q1, voltage is down to 0
V shows that LED1 lamps are bright, while transmit low level signal to host computer, and normal voltage and over-pressed signal show to be high level,
Show that LED2, LED3 do not shine, normal voltage signal and over-pressed signal all transmit high level signal to host computer；
When supply voltage reaches 33.24v, the junction of normal voltage signaling point, i.e. LED2 and Q2, voltage is down to 0 V, i.e. table
Bright LED2 lamps are bright, while transmit low level signal to host computer, and under-voltage signal and over-pressed signal show to be high level, show
LED1, LED3 do not shine, and under-voltage signal and over-pressed signal all transmit high level signal to host computer；
When supply voltage reaches 43.92v, the junction of over-pressed signaling point, i.e. LED3 and Q3, voltage is down to 0 V, that is, shows
LED3 lamps are bright, while transmit low level signal to host computer, and under-voltage signal and normal voltage show to be high level, show
LED1, LED2 do not shine, and under-voltage signal and normal voltage signal all transmit high level signal to host computer；
Whether host computer is normal with the power work that may determine that main power source or Primary Component according to different level signals；Into
And the working condition of slave computer can be prejudged in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218763.1A CN108196109A (en) | 2018-03-16 | 2018-03-16 | A kind of circuit for being used to monitor supply voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218763.1A CN108196109A (en) | 2018-03-16 | 2018-03-16 | A kind of circuit for being used to monitor supply voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108196109A true CN108196109A (en) | 2018-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810218763.1A Pending CN108196109A (en) | 2018-03-16 | 2018-03-16 | A kind of circuit for being used to monitor supply voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108196109A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996026A (en) * | 2006-01-06 | 2007-07-11 | 鸿富锦精密工业（深圳）有限公司 | Discharge lamp drive device and voltage detection circuit using same |
| CN203535108U (en) * | 2013-11-05 | 2014-04-09 | 上海电机学院 | Storage battery voltage detecting circuit |
| CN105099305A (en) * | 2014-05-16 | 2015-11-25 | 环旭电子股份有限公司 | Voltage regulator and voltage build-up circuit |
| CN207007931U (en) * | 2017-07-05 | 2018-02-13 | Tcl空调器(中山)有限公司 | The overvoltage undervoltage detection circuit and Switching Power Supply of Switching Power Supply |
-
2018
- 2018-03-16 CN CN201810218763.1A patent/CN108196109A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996026A (en) * | 2006-01-06 | 2007-07-11 | 鸿富锦精密工业（深圳）有限公司 | Discharge lamp drive device and voltage detection circuit using same |
| CN203535108U (en) * | 2013-11-05 | 2014-04-09 | 上海电机学院 | Storage battery voltage detecting circuit |
| CN105099305A (en) * | 2014-05-16 | 2015-11-25 | 环旭电子股份有限公司 | Voltage regulator and voltage build-up circuit |
| CN207007931U (en) * | 2017-07-05 | 2018-02-13 | Tcl空调器(中山)有限公司 | The overvoltage undervoltage detection circuit and Switching Power Supply of Switching Power Supply |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180622 |
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| RJ01 | Rejection of invention patent application after publication |