CN203337781U - Power supply detection circuit, power supply circuit and electronic equipment - Google Patents
Power supply detection circuit, power supply circuit and electronic equipment Download PDFInfo
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- CN203337781U CN203337781U CN2013202394988U CN201320239498U CN203337781U CN 203337781 U CN203337781 U CN 203337781U CN 2013202394988 U CN2013202394988 U CN 2013202394988U CN 201320239498 U CN201320239498 U CN 201320239498U CN 203337781 U CN203337781 U CN 203337781U
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Abstract
The utility model provides a power supply detection circuit, a power supply circuit and a piece of electronic equipment. The power supply detection circuit is used for detecting the on-off state of the power supply circuit. The power supply circuit comprises an input power supply and a relay. The input power supply is connected with a load through the relay. The power supply detection circuit comprises a sampling unit and a signal processing unit. The relay is further connected with one end of the signal processing unit. The other end of the signal processing unit is connected between the relay and the load through the sampling unit. The sampling unit is used for acquiring voltage signals between the input power supply and the load and further outputting the acquired voltage signals to the signal processing unit. The signal processing unit is used for detecting the on-off state of the relay according to the voltage signals so as to acquire the on-off state of the input power supply. The sampling unit is composed of only a few resistors. The reliability of the detection circuit is thus significantly enhanced. The economic cost for detection is further lowered. Market competition is facilitated.
Description
Technical field
The utility model relates to power technique fields, relates in particular to a kind of power sense circuit, power circuit and electronic equipment.
Background technology
Existing power switch detection circuit commonly used as shown in Figure 1, this circuit in relay switch when conducting state, gather the voltage signal of power circuit by photo-coupler (opticalcoupler), the voltage signal collected is outputed to signal to be processed and control circuit, processed by signal that to detect power circuit repeat circuit switch with control circuit according to the voltage signal gathered be conducting state, thereby the state that detects power supply Vi is conducting state; In relay, switch is when off state, and photo-coupler does not collect voltage signal, and to process and to detect power circuit repeat circuit switch with control circuit be off state to signal, and the state that detects power supply Vi is off state.This circuit extremely relies on the reliability of photo-coupler, once photo-coupler goes wrong, this testing circuit just can not detect the state of electronic switch in power circuit, therefore, existing power switch detection circuit commonly used is not very stable, in addition, and owing to having adopted photo-coupler, cause cost higher, be unfavorable for marketing.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of power sense circuit, power circuit and electronic equipment, is intended to detect reliably and easily the on off state of power supply.
In order to achieve the above object, the utility model proposes a kind of power sense circuit, on off state for detection of power circuit, described power circuit comprises an input power and a relay, described input power is connected with load by described relay, described power sense circuit comprises sampling unit and signal processing unit, wherein:
Described relay also is connected with described signal processing unit one end, and the described signal processing unit other end is connected between described relay and load through described sampling unit;
Described sampling unit, for gathering the voltage signal between described input power and described load, exports the voltage signal collected to described signal processing unit;
Described signal processing unit is for detect the on off state of described relay according to described voltage signal, to obtain the on off state of described input power.
Preferably, described sampling unit comprises one first resistance and one second resistance; Described relay comprises a switch and a coil control end; Described input power positive pole is connected with described the first resistance one end through described switch, and the described first resistance other end is connected with described input power negative pole through described the second resistance; Described input power positive pole also is connected with described load one end through described switch, and the described load other end is connected with described input power negative pole; Described signal processing unit one end is connected between described the first resistance and described the second resistance, the described signal processing unit other end is connected with described coil control end, for outputting a control signal to described relay, described relay is controlled the duty of described switch according to described control signal.
Preferably, described sampling unit comprises one the 3rd resistance, one the 4th resistance and one the 5th resistance; Described relay comprises a switch and a coil control end; Described input power positive pole is connected with described input power negative pole through described the 3rd resistance, described the 4th resistance, described the 5th resistance of series connection, described load is connected in parallel on the two ends of described the 3rd resistance, described switch one end is connected with described input power negative pole, and the described switch other end is connected between described the 3rd resistance and described the 4th resistance; Described signal processing unit one end is connected between described the 4th resistance and described the 5th resistance, the described signal processing unit other end is connected with described coil control end, for outputting a control signal to described relay, described relay is controlled the duty of described switch according to described control signal.
The utility model also proposes a kind of power circuit, comprises input power and relay, and described input power is connected with load by described relay, also comprises power sense circuit as above.
The utility model proposes again a kind of electronic equipment, comprises power circuit as above.
A kind of power sense circuit, power circuit and the electronic equipment that the utility model proposes, by the voltage signal between sampling unit Gather and input power supply and load, detected the duty of power switch according to the voltage signal gathered by signal processing unit, because sampling unit only is comprised of some resistance, make the reliability of this testing circuit strengthen, and reduced the financial cost detected, be conducive to market competition.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of existing power switch detection circuit commonly used;
Fig. 2 is the structured flowchart of the utility model power sense circuit preferred embodiment;
Fig. 3 is a kind of circuit diagram of the utility model power sense circuit preferred embodiment;
Fig. 4 is the another kind of circuit diagram of the utility model power sense circuit preferred embodiment.
In order to make the technical solution of the utility model clearer, clear, below in conjunction with accompanying drawing, be described in further detail.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
With reference to Fig. 2, Fig. 2 is the structured flowchart of the utility model power sense circuit preferred embodiment.
The utility model preferred embodiment proposes a kind of power sense circuit 4, on off state for detection of power circuit, described power circuit comprises an input power 1 and a relay 2, described input power 1 is connected with load 3 by described relay 2, described power sense circuit 4 comprises sampling unit 41 and signal processing unit 42, wherein:
Described relay 2 also is connected with described signal processing unit 42 1 ends, and described signal processing unit 42 other ends are connected between described relay 2 and load 3 through described sampling unit 41;
Described sampling unit 41, for gathering the voltage signal between described input power 1 and described load 3, exports the voltage signal collected to described signal processing unit 42;
Described signal processing unit 42 is for detect the on off state of described relay 2 according to described voltage signal, to obtain the on off state of described input power 1.
Particularly, as shown in Figure 3, Fig. 3 is a kind of circuit diagram of the utility model power sense circuit preferred embodiment, and described sampling unit 41 comprises one first resistance R 1 and one second resistance R 2; Described relay 2 comprises a K switch 1 and a coil control end e; Described input power 1 is that input power Ui positive pole is connected with described the first resistance R 1 one ends through described K switch 1, and described first resistance R 1 other end is connected with described input power Ui negative pole through described the second resistance R 2; Described input power Ui positive pole is also that load RL mono-end is connected through described K switch 1 and described load 3, and the described load RL other end is connected with described input power Ui negative pole; Described signal processing unit 42 1 ends are connected to the d point between described the first resistance R 1 and described the second resistance R 2, described signal processing unit 42 other ends are connected with described coil control end e, for outputting a control signal to described relay 2, described relay 2 is controlled the duty of described K switch 1 according to described control signal.
The principle of work of a kind of circuit diagram of the utility model power sense circuit preferred embodiment specifically describes as follows: when K switch 1 conducting, input power Ui and K switch 1, the first resistance R 1, the second resistance R 2 form the conducting loop, the d point voltage is the second resistance R 2 both end voltage, Vd=(R2/R1+R2) * Ui, signal processing unit 42 receives d point voltage signal Vd, go out K switch 1 for conducting state according to the size detection of Vd now, the on off state that detects input power Ui is conducting state; When K switch 1 is turn-offed, the d point voltage is 0, i.e. Vd=0, and signal processing unit 42 goes out K switch 1 for off state according to the size detection of Vd now, and the on off state that detects input power Ui is off state;
As shown in Figure 4, Fig. 4 is the another kind of circuit diagram of the utility model power sense circuit preferred embodiment, and described sampling unit 41 comprises one the 3rd resistance R 3, one the 4th resistance R 4 and one the 5th resistance R 5; Described relay 2 comprises a K switch 2 and a coil control end e; Described input power 1 is that input power Ui positive pole is connected with described input power Ui negative pole through described the 3rd resistance R 3, described the 4th resistance R 4, described the 5th resistance R 5 of series connection, described load 3 is the two ends that load RL is connected in parallel on described the 3rd resistance R 3, described K switch 2 one ends are connected with described input power Ui negative pole, and described K switch 2 other ends are connected between described the 3rd resistance R 3 and described the 4th resistance R 4; Described signal processing unit 42 1 ends are connected to the d point between described the 4th resistance R 4 and described the 5th resistance R 5, described signal processing unit 42 other ends are connected with described coil control end e, for outputting a control signal to described relay 2, described relay 2 is controlled the duty of described K switch 2 according to described control signal.
The principle of work of the another kind of circuit of the utility model power sense circuit preferred embodiment specifically describes as follows:
When K switch 2 conducting, input power Ui and K switch 2, the 3rd resistance R 3 form the conducting loop, the d point voltage is 0, be Vd=0, signal processing unit 42 receives d point voltage signal Vd, go out K switch 2 for conducting state according to the size detection of Vd now, the on off state that detects input power Ui is conducting state;
When K switch 2 is turn-offed, input power Ui and the 3rd resistance R 3, the 4th resistance R 4 and the 5th resistance R 5 form the conducting loop, and the d point voltage is the 5th resistance R 5 both end voltage,
As load RL, during in open-circuit condition, it is infinitely great that RL is tending towards,
like this as load RL in when open circuit, sampling unit 41 still can form loop with input power Ui, and can collect voltage signal Vd; As load RL during in short-circuit condition, RL=0,
can adjust the value of Vd by the resistance ratios of adjusting R4, R5, and then within the voltage signal that signal processing unit 42 is received remains on its normal working range, avoid that to cause Vd excessive because of load RL short circuit, cause the damage of signal processing unit 42.Like this, signal processing unit 42 receives the d point voltage signal Vd that sampling unit 41 gathers, and according to the size detection of Vd now, goes out K switch 2 for off state, and the on off state that detects power circuit is off state.
The utility model also proposes a kind of power circuit, and this power circuit comprises input power 1 and relay 2, and described input power 1 is connected with load 3 by described relay 2, also comprises power sense circuit 4 as above.The circuit structure of this power sense circuit 4 and principle can, with reference to aforementioned, not repeat them here.Owing to having adopted above-mentioned power sense circuit 4, improved the reliability that detects switching-on and switching-off state, can meet the demand of practical application.
The utility model proposes again a kind of electronic equipment, and this electronic equipment comprises above-mentioned power circuit, has improved the reliability that detects switching-on and switching-off state, and very simple and easy, has reduced production cost, is conducive to market competition and popularization.
A kind of power sense circuit, power circuit and the electronic equipment that the utility model proposes, by the voltage signal between sampling unit 41 Gather and input power supplys 1 and load 3, detected the duty of power switch according to the voltage signal gathered by signal processing unit 42, because sampling unit 41 only is comprised of some resistance, make the reliability of this testing circuit 4 strengthen, and reduced the financial cost detected, be conducive to market competition.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical field, all in like manner be included in scope of patent protection of the present utility model.
Claims (5)
1. a power sense circuit, on off state for detection of power circuit, described power circuit comprises an input power and a relay, described input power is connected with load by described relay, it is characterized in that, described power sense circuit comprises sampling unit and signal processing unit, wherein:
Described relay also is connected with described signal processing unit one end, and the described signal processing unit other end is connected between described relay and load through described sampling unit;
Described sampling unit, for gathering the voltage signal between described input power and described load, exports the voltage signal collected to described signal processing unit;
Described signal processing unit is for detect the on off state of described relay according to described voltage signal, to obtain the on off state of described input power.
2. power sense circuit according to claim 1, is characterized in that, described sampling unit comprises one first resistance and one second resistance; Described relay comprises a switch and a coil control end; Described input power positive pole is connected with described the first resistance one end through described switch, and the described first resistance other end is connected with described input power negative pole through described the second resistance; Described input power positive pole also is connected with described load one end through described switch, and the described load other end is connected with described input power negative pole; Described signal processing unit one end is connected between described the first resistance and described the second resistance, the described signal processing unit other end is connected with described coil control end, for outputting a control signal to described relay, described relay is controlled the duty of described switch according to described control signal.
3. power sense circuit according to claim 1, is characterized in that, described sampling unit comprises one the 3rd resistance, one the 4th resistance and one the 5th resistance; Described relay comprises a switch and a coil control end; Described input power positive pole is connected with described input power negative pole through described the 3rd resistance, described the 4th resistance, described the 5th resistance of series connection, described load is connected in parallel on the two ends of described the 3rd resistance, described switch one end is connected with described input power negative pole, and the described switch other end is connected between described the 3rd resistance and described the 4th resistance; Described signal processing unit one end is connected between described the 4th resistance and described the 5th resistance, the described signal processing unit other end is connected with described coil control end, for outputting a control signal to described relay, described relay is controlled the duty of described switch according to described control signal.
4. a power circuit, comprise input power and relay, and described input power is connected with load by described relay, it is characterized in that, also comprises the described power sense circuit of any one in claim 1-3.
5. an electronic equipment, is characterized in that, comprises power circuit claimed in claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202394988U CN203337781U (en) | 2013-05-06 | 2013-05-06 | Power supply detection circuit, power supply circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202394988U CN203337781U (en) | 2013-05-06 | 2013-05-06 | Power supply detection circuit, power supply circuit and electronic equipment |
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| CN203337781U true CN203337781U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202394988U Expired - Lifetime CN203337781U (en) | 2013-05-06 | 2013-05-06 | Power supply detection circuit, power supply circuit and electronic equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526003A (en) * | 2017-07-20 | 2017-12-29 | 北京天泰怡和科技有限公司 | Intelligent distribution network automatic analysis system |
| CN110187269A (en) * | 2019-06-21 | 2019-08-30 | 江苏伊施德创新科技有限公司 | A kind of relay full load test reduces the method and device of energy consumption |
| CN114488993A (en) * | 2021-12-20 | 2022-05-13 | 上海华兴数字科技有限公司 | Circuit state detection device and method |
-
2013
- 2013-05-06 CN CN2013202394988U patent/CN203337781U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526003A (en) * | 2017-07-20 | 2017-12-29 | 北京天泰怡和科技有限公司 | Intelligent distribution network automatic analysis system |
| CN110187269A (en) * | 2019-06-21 | 2019-08-30 | 江苏伊施德创新科技有限公司 | A kind of relay full load test reduces the method and device of energy consumption |
| CN110187269B (en) * | 2019-06-21 | 2024-03-29 | 江苏伊施德创新科技有限公司 | Method and device for reducing energy consumption in relay full-load test |
| CN114488993A (en) * | 2021-12-20 | 2022-05-13 | 上海华兴数字科技有限公司 | Circuit state detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518067, 9th Floor, Block A, Garden City Digital Building, 1079 Nanhai Avenue, Shekou, Nanshan District, Shenzhen City, Guangdong Province Patentee after: CHIPSEA TECHNOLOGIES (SHENZHEN) Corp. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Nanhai Road No. 1079 Garden City digital building block A No. 901A Patentee before: SHENZHEN CHIPSEA TECHNOLOGIES CO.,LTD. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
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| CX01 | Expiry of patent term |