CN104062548A - Commercial power power-down alarm circuit - Google Patents
Commercial power power-down alarm circuit Download PDFInfo
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- CN104062548A CN104062548A CN201410263640.1A CN201410263640A CN104062548A CN 104062548 A CN104062548 A CN 104062548A CN 201410263640 A CN201410263640 A CN 201410263640A CN 104062548 A CN104062548 A CN 104062548A
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Abstract
The invention discloses a commercial power power-down alarm circuit which comprises a half-wave rectifying circuit, a bleeder circuit, an alarm circuit and a power circuit. The half-wave rectifying circuit is used for being externally connected with commercial power and connected with the alarm circuit through the bleeder circuit. The power circuit is used for providing work voltage for the alarm circuit. According to the commercial power power-down alarm circuit, when voltage of the commercial power is lower than 50 V, an alarm is given, a user is reminded to find a commercial power power-down fault as soon as possible so that repair can be conducted conveniently in time, and the commercial power power-down alarm circuit is simple and easy to obtain and has the good application prospect.
Description
Technical field
The present invention relates to a kind of civil power power down warning circuit, belong to power test technical field.
Background technology
The AC power of family expenses (civil power) in use, often break down, such as situations such as tripping, open circuit, can not effectively power, especially when evening, just know can not power time, can cause a lot of inconvenience, if during civil power power down, can make user's very first time find, keep in repair in time, be very necessary.
Summary of the invention
The object of the invention is to overcome civil power in use, often break down, such as situations such as tripping, open circuit, can not effectively power, especially when evening, just know can not power time, can cause the problem of a lot of inconvenience.Civil power power down warning circuit of the present invention, when the voltage of civil power is during lower than 50V, will send chimes of doom, and the reminding user very first time is found civil power power down fault, so that on-call maintenance, circuit is simple, easily realizes, and has a good application prospect.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of civil power power down warning circuit, it is characterized in that: comprise half-wave rectifying circuit, bleeder circuit, warning circuit, power circuit, described half-wave rectifying circuit is for external civil power, and be connected with warning circuit by bleeder circuit, described power circuit is for providing operating voltage to warning circuit;
Described half-wave rectifying circuit comprises commutation diode D1, and the positive pole of described commutation diode D1 is connected with one end of civil power, and the negative pole of described commutation diode D1, as the output terminal of half-wave rectifying circuit, is connected with bleeder circuit;
Described bleeder circuit comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 being in series, the front end of described the first resistance R 1 is connected with the negative pole of commutation diode D1, described the 4th rear end of resistance R 4 and the other end of civil power are connected, described the second resistance R 2, the 3rd resistance R 3 junctions are as the output terminal of bleeder circuit, for driving warning circuit;
Described warning circuit comprises transistor T 1, metal-oxide-semiconductor T2 and hummer BZ1, the base stage of described transistor T 1 is connected with the second resistance R 2, the 3rd resistance R 3 junctions, the emitter of described transistor T 1 is connected with the 3rd resistance R 3, the 4th resistance R 4 junctions, the collector of described transistor T 1 is connected with the grid of metal-oxide-semiconductor T2, the drain electrode of described metal-oxide-semiconductor T2 is connected with hummer BZ1 one end, the other end of described hummer BZ1 is connected with the positive output end of power circuit, and the source electrode of described metal-oxide-semiconductor T2 is connected with the negative output terminal of power circuit.
Aforesaid a kind of civil power power down warning circuit, is characterized in that: the output voltage of described power circuit is 9V.
Aforesaid a kind of civil power power down warning circuit, is characterized in that: between the positive output end of described power circuit and the grid of metal-oxide-semiconductor T2, be also provided with biasing resistor R5.
Aforesaid a kind of civil power power down warning circuit, is characterized in that: the resistance of described the first resistance R 1, the second resistance R 2, the 4th resistance R 4 is 10M Ω, and the resistance of described the 3rd resistance R 3 is 470k Ω.
Aforesaid a kind of civil power power down warning circuit, it is characterized in that: between the junction of the junction of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3, the 4th resistance R 4, be also provided with the first capacitor C 1, the capacitance of described the first capacitor C 1 is 100nf, and withstand voltage is 400V.
Aforesaid a kind of civil power power down warning circuit, is characterized in that: the model of described hummer is CEP-2260A.
The invention has the beneficial effects as follows: civil power power down warning circuit of the present invention, when the voltage of civil power is during lower than 50V, will send chimes of doom, the reminding user very first time is found civil power power down fault, so that on-call maintenance, circuit is simple, easily realize, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of civil power power down warning circuit of the present invention.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, a kind of civil power power down warning circuit, it is characterized in that: comprise half-wave rectifying circuit, bleeder circuit, warning circuit, power circuit, described half-wave rectifying circuit is for external civil power, and be connected with warning circuit by bleeder circuit, described power circuit is for providing operating voltage to warning circuit;
Described half-wave rectifying circuit comprises commutation diode D1, and the positive pole of described commutation diode D1 is connected with one end of civil power, and the negative pole of described commutation diode D1, as the output terminal of half-wave rectifying circuit, is connected with bleeder circuit;
Described bleeder circuit comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 being in series, the front end of described the first resistance R 1 is connected with the negative pole of commutation diode D1, described the 4th rear end of resistance R 4 and the other end of civil power are connected, described the second resistance R 2, the 3rd resistance R 3 junctions are as the output terminal of bleeder circuit, for driving warning circuit;
Described warning circuit comprises transistor T 1, metal-oxide-semiconductor T2 and hummer BZ1, the base stage of described transistor T 1 is connected with the second resistance R 2, the 3rd resistance R 3 junctions, the emitter of described transistor T 1 is connected with the 3rd resistance R 3, the 4th resistance R 4 junctions, the collector of described transistor T 1 is connected with the grid of metal-oxide-semiconductor T2, the drain electrode of described metal-oxide-semiconductor T2 is connected with hummer BZ1 one end, the other end of described hummer BZ1 is connected with the positive output end of power circuit, and the source electrode of described metal-oxide-semiconductor T2 is connected with the negative output terminal of power circuit.
The output voltage of described power circuit is 9V, and the model of hummer is CEP-2260A, operating voltage 9V, and working current 5mA, low in energy consumption, the life-span of the battery that the chimes of doom sound that sends is large, the common 3-5 that can power.
Between the grid of the positive output end of described power circuit and metal-oxide-semiconductor T2, be also provided with biasing resistor R5, biasing resistor R5 can select the resistance of 10M Ω, lowers the electric current of metal-oxide-semiconductor T2, prevents from puncturing (it is very little that metal-oxide-semiconductor grid current needs).
The resistance of described the first resistance R 1, the second resistance R 2, the 4th resistance R 4 is 10M Ω, and the resistance of the 3rd resistance R 3 is 470k Ω,
Between the junction of the junction of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3, the 4th resistance R 4, be also provided with the first capacitor C 1, the capacitance of described the first capacitor C 1 is 100nf, and withstand voltage is 400V.
The course of work of civil power power down warning circuit of the present invention is, civil power is through commutation diode D1 half-wave rectification, with resistance R 1, R2, R3 and R4 are composed in series voltage divider, in resistance R 3, get small voltage and go to control the duty of transistor T 1 and metal-oxide-semiconductor T2, once civil power power-off or voltage too low (lower than 50V), buzzer BZ1 just sends chimes of doom, because commutation diode D1 plays half-wave rectification effect, thereby what send into transistor T 1 is pulse direct current signal, in AC supply voltage under normal circumstances, voltage in resistance R 3 can keep transistor T 1 conducting, metal-oxide-semiconductor T2 is in cut-off state, once ac grid voltage is lower than 50V, the voltage on R3 drops to lower than the required threshold value of transistor T 1 conducting, T1 cut-off, and the grid voltage of metal-oxide-semiconductor T2 raises, being enough to make metal-oxide-semiconductor T2 conducting. hummer BZ1 just sends strong chimes of doom, the reminding user very first time is found civil power power down fault, so that on-call maintenance, circuit is simple, easily realize, have a good application prospect.
More than show and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. a civil power power down warning circuit, it is characterized in that: comprise half-wave rectifying circuit, bleeder circuit, warning circuit, power circuit, described half-wave rectifying circuit is for external civil power, and be connected with warning circuit by bleeder circuit, described power circuit is for providing operating voltage to warning circuit;
Described half-wave rectifying circuit comprises commutation diode D1, and the positive pole of described commutation diode D1 is connected with one end of civil power, and the negative pole of described commutation diode D1, as the output terminal of half-wave rectifying circuit, is connected with bleeder circuit;
Described bleeder circuit comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 being in series, the front end of described the first resistance R 1 is connected with the negative pole of commutation diode D1, described the 4th rear end of resistance R 4 and the other end of civil power are connected, described the second resistance R 2, the 3rd resistance R 3 junctions are as the output terminal of bleeder circuit, for driving warning circuit;
Described warning circuit comprises transistor T 1, metal-oxide-semiconductor T2 and hummer BZ1, the base stage of described transistor T 1 is connected with the second resistance R 2, the 3rd resistance R 3 junctions, the emitter of described transistor T 1 is connected with the 3rd resistance R 3, the 4th resistance R 4 junctions, the collector of described transistor T 1 is connected with the grid of metal-oxide-semiconductor T2, the drain electrode of described metal-oxide-semiconductor T2 is connected with hummer BZ1 one end, the other end of described hummer BZ1 is connected with the positive output end of power circuit, and the source electrode of described metal-oxide-semiconductor T2 is connected with the negative output terminal of power circuit.
2. a kind of civil power power down warning circuit according to claim 1, is characterized in that: the output voltage of described power circuit is 9V.
3. a kind of civil power power down warning circuit according to claim 1, is characterized in that: between the positive output end of described power circuit and the grid of metal-oxide-semiconductor T2, be also provided with biasing resistor R5.
4. a kind of civil power power down warning circuit according to claim 1, is characterized in that: the resistance of described the first resistance R 1, the second resistance R 2, the 4th resistance R 4 is 10M Ω, and the resistance of described the 3rd resistance R 3 is 470k Ω.
5. a kind of civil power power down warning circuit according to claim 1, it is characterized in that: between the junction of the junction of described the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3, the 4th resistance R 4, be also provided with the first capacitor C 1, the capacitance of described the first capacitor C 1 is 100nf, and withstand voltage is 400V.
6. a kind of civil power power down warning circuit according to claim 1, is characterized in that: the model of described hummer is CEP-2260A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410263640.1A CN104062548A (en) | 2014-06-13 | 2014-06-13 | Commercial power power-down alarm circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410263640.1A CN104062548A (en) | 2014-06-13 | 2014-06-13 | Commercial power power-down alarm circuit |
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| CN104062548A true CN104062548A (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410263640.1A Pending CN104062548A (en) | 2014-06-13 | 2014-06-13 | Commercial power power-down alarm circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133361A (en) * | 2019-04-30 | 2019-08-16 | 浙江亿邦通信科技有限公司 | Power down alarm system based on low-voltage monitoring |
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| CN200962514Y (en) * | 2006-10-25 | 2007-10-17 | 深圳桑达国际电子器件有限公司 | Electricity drop detection device |
| CN201344951Y (en) * | 2008-12-19 | 2009-11-11 | 苏州市华芯微电子有限公司 | Power failure detection circuit |
| CN102355046A (en) * | 2011-09-09 | 2012-02-15 | Tcl新技术（惠州）有限公司 | Voltage detection and power failure protection device and implementation method |
| CN203069654U (en) * | 2012-12-30 | 2013-07-17 | 深圳市显控自动化技术有限公司 | Power failure detection circuit |
| CN203101494U (en) * | 2013-03-15 | 2013-07-31 | 深圳市银河表计股份有限公司 | AC (alternating current) electric supply power failure detection circuit, equipment and system |
| CN203535107U (en) * | 2013-11-15 | 2014-04-09 | 太仓市同维电子有限公司 | Low power AC power-off alarming circuit |
| CN204008959U (en) * | 2014-06-13 | 2014-12-10 | 苏州华徕光电仪器有限公司 | A kind of civil power power down warning circuit |
-
2014
- 2014-06-13 CN CN201410263640.1A patent/CN104062548A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200962514Y (en) * | 2006-10-25 | 2007-10-17 | 深圳桑达国际电子器件有限公司 | Electricity drop detection device |
| CN201344951Y (en) * | 2008-12-19 | 2009-11-11 | 苏州市华芯微电子有限公司 | Power failure detection circuit |
| CN102355046A (en) * | 2011-09-09 | 2012-02-15 | Tcl新技术（惠州）有限公司 | Voltage detection and power failure protection device and implementation method |
| CN203069654U (en) * | 2012-12-30 | 2013-07-17 | 深圳市显控自动化技术有限公司 | Power failure detection circuit |
| CN203101494U (en) * | 2013-03-15 | 2013-07-31 | 深圳市银河表计股份有限公司 | AC (alternating current) electric supply power failure detection circuit, equipment and system |
| CN203535107U (en) * | 2013-11-15 | 2014-04-09 | 太仓市同维电子有限公司 | Low power AC power-off alarming circuit |
| CN204008959U (en) * | 2014-06-13 | 2014-12-10 | 苏州华徕光电仪器有限公司 | A kind of civil power power down warning circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133361A (en) * | 2019-04-30 | 2019-08-16 | 浙江亿邦通信科技有限公司 | Power down alarm system based on low-voltage monitoring |
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Application publication date: 20140924 |
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