CN102664451A - Power failure detection circuit and detection method thereof - Google Patents
Power failure detection circuit and detection method thereof Download PDFInfo
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- CN102664451A CN102664451A CN2012101369033A CN201210136903A CN102664451A CN 102664451 A CN102664451 A CN 102664451A CN 2012101369033 A CN2012101369033 A CN 2012101369033A CN 201210136903 A CN201210136903 A CN 201210136903A CN 102664451 A CN102664451 A CN 102664451A
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Abstract
The invention discloses a power failure detection circuit and a detection method thereof. The power failure detection circuit is arranged behind a switch of a power utilization circuit, and comprises an input power supply detection circuit, an input characteristic detection circuit, a control circuit, a power supply switching circuit and a backup power supply, wherein the input power supply detection circuit is a power failure detection circuit for detecting the cut-off of commercial power; the input characteristic detection circuit is used for detecting the impedance of an input end; detection results of the input power supply detection circuit and the input characteristic detection circuit are transmitted to the control circuit; the control circuit is used for controlling the work of the power supply switching circuit according to the detection results; and the backup power supply is connected with the power supply switching circuit. The power failure type can be judged by judging the change of an input power supply characteristic; and during application of the power failure detection circuit and the detection method thereof, the conventional wiring is not required to be changed, low cost and high expandability are realized, the use feel of a product can be improved, and the application field is expanded.
Description
Technical field
The present invention relates to a kind of outage detecting mode, be specifically related to the outage detecting mode that a kind of input power supply state that is used for the electronic installation of built-in back-up source is judged.
Background technology
Traditional universal outage circuit for detecting generally all is only to judge having or not of power supply, and its implementation is the amplitude of detecting voltage or electric current; The variation of the Partial Variable in frequency or the phase place is judged, in the time of power interruptions, all with amplitude; Frequency, the change of variablees such as phase place.This type of outage circuit for detecting has obtained in the products such as uninterrupted power supply widely using in emergency lighting, and along with the continuous development of electronic product; Traditional outage decision procedure can not satisfy the demand of some special applications, like family's Emergency Lighting Supply, because user's inconvenience change circuit; But if with original switch control electric light; Just needing electric light can differentiate user people intelligently is the difference with these two kinds of power failure situations of accident power-off of turning off the light, and promptly need can judge that artificial initiatively outage still is an accident power-off than the tradition more outage circuit for detecting of specialty of circuit for detecting that cuts off the power supply; This just needs a kind of more circuit for detecting of intelligence, can differentiate this species diversity.Patent of the present invention has promptly designed a kind of new outage detecting mode; Can differentiate power failure is that initiatively outage or accident power-off cause; This new power-down mode can be improved the performance of outage circuit for detecting; Promote the easy-to-use degree of anti-power failure product, it is used and also can expedite the emergence of novel anti-power failure product.
The patent No. is that the do not cut off the power supply patent of arrangement for detecting of 201020595914.4-promptly is because the deficiency of tradition outage detecting mechanism and the wireless outage arrangement for detecting of innovative design; Be located at before the facility switching through an extra outage arrangement for detecting; Transmit power supply state through wireless mode, can solve the outage reason decision problem of family's emergency lighting to a certain extent.But the shortcoming of this mode is that cost is higher; Except wireless launcher of needs, also need each equipment to install a wireless reception device, cause equipment cost too high; Outage that it is wireless detecting also faces difficult problems such as adjacent system interference and work isolation, thereby commercial value is not high.
Summary of the invention
The object of the invention is to provide a kind of outage circuit for detecting and method for detecting thereof; It can be differentiated, and the input power supply characteristic changes and then the differentiation outage types, directly is integrated in anti-power failure product inside, need not the outage arrangement for detecting of extra installing; Also need not to change existing distribution; Cost is low, extensibility is strong, also can promote the use experience of product, expands the application of anti-power failure product.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of outage circuit for detecting; Said outage circuit for detecting is located at after the switch of power circuit; It comprises input power sensor detecting circuit, input characteristics circuit for detecting, control circuit, power supply commutation circuit and back-up source, and the input power sensor detecting circuit is the outage circuit for detecting, and whether be used to detect civil power interrupts; The impedance of input characteristics circuit for detecting detecting input; The detecting result of input power sensor detecting circuit, input characteristics circuit for detecting all is sent to control circuit, the work that control circuit is controlled the power supply commutation circuit according to the detecting result whether, said back-up source links to each other with the power supply commutation circuit.
Further; Said power circuit comprises power supply, the switch that links to each other with power supply, load and the AC/DC change-over circuit of being located at the load front end; Said input characteristics circuit for detecting, input power sensor detecting circuit are located between switch and the AC/DC change-over circuit, and the power supply commutation circuit is located between AC/DC change-over circuit and the load.
The outage method for detecting that the present invention also provides a kind of and above-mentioned outage circuit for detecting to match, the step of the detecting of specifically cutting off the power supply is following:
When the input power sensor detecting circuit was measured power failure, control circuit was opened the work of input characteristics circuit for detecting, will detect the result and return to control circuit; If the input characteristics circuit for detecting is judged switch closure, i.e. accident power-off, the control circuit commutation circuit of will supply power switches to back-up source and supplies power; , breaks off the input characteristics circuit for detecting i.e. artificially outage, then the do not supply power switching of commutation circuit of control circuit if measuring switch.
Reply when the input power sensor detecting circuit records power supply, pass to control circuit, control circuit cuts out the input characteristics circuit for detecting.Equipment gets into the normal power supply pattern.
For above-mentioned outage method for detecting, we also have further optimization execution mode.
Further, when power supply interrupted being accident power-off for some reason, voltage descended between the positive-negative power line; The input power sensor detecting circuit detects outage and takes place, and passes to control circuit, and control circuit is power-on characteristic detecting circuit immediately; The complex impedance that the power supply characteristic circuit for detecting detects between the power line is low resistive state; Judge that promptly power failure is because of power supply trouble takes place, control circuit is promptly controlled the power supply commutation circuit and is switched to back-up source load is supplied power, and equipment gets into the reserve powering mode.
Further; When the artificial disconnection of switch was promptly artificially cut off the power supply, the voltage between the positive-negative power line descended, and imported power sensor detecting circuit and detected the outage generation; Pass to control circuit; Control circuit is power-on characteristic detecting circuit immediately, and the complex impedance that the power supply characteristic circuit for detecting detects between the power line is high-impedance state, judges that promptly power failure is to cause because of artificial stopcock; Control circuit control power supply commutation circuit does not switch to the back-up source powering load, and the power supply characteristic circuit for detecting gets into standby mode.
Further, equipment quits work, and switch breaks off; Power supply is also under the situation of unavailability, when user's close switch, after the power supply characteristic circuit for detecting that is in standby mode detects switch closure; Characteristic between the positive-negative power line changes and is low resistive state; The power supply characteristic circuit for detecting is judged to be user's close switch, and control circuit drives the power supply commutation circuit and switches to back-up source, gets into the reserve powering mode.
Further; When power supply recovered to supply not yet, the characteristic changing that user's cut-off switch, power supply characteristic circuit for detecting detect between the positive-negative power line was a high-impedance state; The power supply characteristic circuit for detecting is judged to be switch and breaks off; Belong to the user and initiatively close load, control circuit drives the power supply commutation circuit and cuts out the power supply of back-up source to load, and the power supply characteristic circuit for detecting gets into standby mode.
Further, when load is in the work of power backup pattern, switch closure, power up, input power sensor detecting circuit Drive and Control Circuit, control circuit drives the power supply commutation circuit and switches to the power supply power supply, gets into the normal power supply pattern.
With respect to scheme of the prior art, advantage of the present invention is:
Outage circuit for detecting and method for detecting thereof described in the invention need not to set up extra attachment device, need not to change any distribution, and the outage circuit for detecting of intelligence is integrated in load inside.The user can only pass through original power switch, the switch of control appliance.Further, when power supply is normal, can establishes start and stop through the normal control of original power switch, and can not be strayed into the reserve powering mode.And under the situation of power failure, need not other any operation bidirectional, still can be through the start and stop of original power switch control appliance; Therefore can reach high ease of use.Further, when the equipment that utilizes novel outage detecting circuit is in the normal power supply pattern, if run into accident power-off; Equipment can switch to the reserve powering mode without interruption; Work as service restoration, equipment is switchback normal power supply pattern without interruption also, when equipment is normally closed; If run into the power supply accidental interruption, equipment still keeps shut; Service restoration, equipment also still keeps shut.Say simply, i.e. the startup of equipment and stop only to receive the control of mains switch, and with power supply have or not that it doesn't matter.To sum up, the present invention can be applicable to can effectively promote the range of application of product on the equipment such as emergency lighting, uninterrupted power supply, and the expanded application field promotes the product use experience.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is the cut off the power supply structured flowchart of circuit for detecting of the present invention;
Fig. 2 is the concrete application structure block diagram of the present invention in illuminating product;
Fig. 3 is a general family wiring diagram in the embodiment of the invention;
Fig. 4 is the workflow diagram of the outage method for detecting in the embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment such scheme is further specified.Should be understood that these embodiment are used to the present invention is described and are not limited to limit scope of the present invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the difference of concrete application, and not marked implementation condition is generally the condition in the normal experiment.Impedance method for detecting in the input power supply characteristic circuit, because of multiple way of realization is arranged, the part way of realization belongs to this area engineer and need not the circuit that creative work can be realized, so will not give unnecessary details in this article.
Embodiment:
The overall structure of outage circuit for detecting of the present invention is as shown in Figure 1, and said power circuit comprises power supply, the switch that links to each other with power supply, load and the AC/DC change-over circuit of being located at the load front end.Said outage circuit for detecting is located at after the switch of power circuit; It comprises input power sensor detecting circuit, input characteristics circuit for detecting, control circuit, power supply commutation circuit and back-up source; The input power sensor detecting circuit is the outage circuit for detecting; Be used to detect civil power and whether interrupt, the impedance of input characteristics circuit for detecting detecting input, the detecting result of input power sensor detecting circuit, input characteristics circuit for detecting all is sent to control circuit; The work that control circuit is controlled the power supply commutation circuit according to the detecting result whether, said back-up source links to each other with the power supply commutation circuit.Said input characteristics circuit for detecting, input power sensor detecting circuit are located between switch and the AC/DC change-over circuit, and the power supply commutation circuit is located between AC/DC change-over circuit and the load.
The concrete application structure block diagram of the present invention in illuminating product is as shown in Figure 2, and said AC power supply is the AC power input, and said switch is the switch of control lamp; Said novel outage detecting mains lighting supply, there is the input characteristics circuit for detecting inside, the input power sensor detecting circuit; AC driving circuit, charging circuit, control circuit; Led array, dc drive circuit, back-up source.
Said AC power supply connects switch, the input power sensor detecting circuit, and AC driving circuit, the input characteristics circuit for detecting is connected after the switch; Driving LED array light-emitting when AC driving circuit is supplied power at AC, charging circuit in the AC power supply just often charges to back-up source; When needs reserve is supplied power, dc drive circuit driving LED array light-emitting, control circuit connects charging circuit; The switch of control charging circuit connects the input characteristics circuit for detecting, detecting power supply input characteristics when outage; Judge outage types, connect dc drive circuit, carry out switch and brightness adjustment control.The signal that the input power sensor detecting circuit provides the civil power break-make is to control circuit.
Adopt the illuminating product of novel outage detecting circuit to test through reality, reliable for effect, easy to use, high practical value is arranged.
The present invention also can be applicable to be fit to the emergency light that family uses, that is to say be light fixture used in everyday also be the light fixture of emergency lighting simultaneously, only need outage circuit for detecting described in the invention is integrated in the load.General family wiring diagram is as shown in Figure 3, and two main causes that cause power failure usually are that sub-district transformer front end mains-supplied is interrupted and the house lead in switch trip.
When the house lead in master switch; Under the state of switch W1 closure, cause transformer preceding civil power in sub-district to interrupt or the switch P disconnection power line L of load because of fault; Power supply is also promptly interrupted between the N; Be the Low ESR short-circuit condition because of the non-inductive voltage of the coil of transformer between load input terminal supply main L, the N this moment, and it is low and near short circuit that the power supply characteristic circuit for detecting in the load can detect impedance operator between L, the N; Thereby can discern outage types is accident power-off, and emergency light changes the reserve powering mode over to.
When the house lead in switch jump; The power line L of load, the power failure between the N; Power supply characteristic circuit for detecting in the load can detect the impedance between L, the N; The existence of normality load makes the power supply characteristic circuit for detecting in the emergency light can record inductance, electric capacity and resistance characteristic between certain line, thereby picks out outage types.All there is the normality load in general family, and further, the house lead in switch jump generally is that the load effect that drop into this moment is equal to the normality load, has further guaranteed the property distinguished that is prone to of outage reason owing to dropped into excessive load or the load leakage current is excessive.
Therefore no matter be that civil power interrupts or the abnormal power-down that the house lead in switch trip causes, the power supply characteristic circuit for detecting in the load all can detect the impedance variations between the power line.Thereby the resolution outage types is made corresponding reaction.
The present invention roughly comprises the steps: when cutting off the power supply detecting
When the input power sensor detecting circuit was measured power failure, control circuit was opened the work of input characteristics circuit for detecting, will detect the result and return to control circuit; Be input as Low ESR if the input characteristics circuit for detecting is judged, promptly switch closure is accident power-off; The control circuit commutation circuit of will supplying power switches to back-up source power supply, is input as high impedance if the input characteristics circuit for detecting is measured, and promptly switch breaks off; Be artificial outage, then the do not supply power switching of commutation circuit of control circuit;
Reply when the input power sensor detecting circuit records power supply, pass to control circuit, control circuit cuts out the input characteristics circuit for detecting.
More detailed outage detecting and handling process can be divided into for three megastages:
Phase I: when equipment is in the normal power supply pattern; Voltage descends between the positive-negative power line, and the input power sensor detecting circuit detects outage and takes place, and passes to control circuit; Control circuit is power-on characteristic detecting circuit immediately, and the power supply characteristic circuit for detecting detects the complex impedance between the power line:
If the complex impedance that the power supply characteristic circuit for detecting detects between the power line is low resistive state; Judge that promptly power failure is to take place because of power supply trouble; Control circuit is promptly controlled the power supply commutation circuit and is switched to back-up source load is supplied power, and gets into the reserve powering mode;
If the complex impedance that the power supply characteristic circuit for detecting detects between the power line is high-impedance state; Judge that promptly power failure is to cause because of artificial stopcock; Control circuit control power supply commutation circuit does not switch to the back-up source powering load, and the power supply characteristic circuit for detecting gets into standby mode.
Second stage: switch is in off-state, device shutdown, and the power supply characteristic circuit for detecting is in standby mode.
Under the prerequisite of power supply unavailability; When user's close switch, after the power supply characteristic circuit for detecting that is in standby mode detected switch closure, the characteristic between the positive-negative power line changed and is low resistive state; The power supply characteristic circuit for detecting is judged to be user's close switch; Control circuit drives the power supply commutation circuit and switches to back-up source, to electric, gets into the reserve powering mode.
Have at power supply under the prerequisite of supply, when user's close switch, equipment normally opens, and gets into the normal power supply pattern.
Phase III: when load was in the reserve powering mode, switch also must be in closure state, the power supply characteristic circuit for detecting remains on the detecting state.
When the power supply supply recovers, import the power sensor detecting circuit Drive and Control Circuit, control circuit drives the power supply commutation circuit and switches to the power supply power supply, changes the normal power supply pattern over to.
When user's cut-off switch; The characteristic changing that the power supply characteristic circuit for detecting detects between the positive-negative power line is a high-impedance state; The power supply characteristic circuit for detecting is judged to be switch and breaks off, and belongs to the user and initiatively closes load, and control circuit drives the power supply commutation circuit and cuts out the power supply of back-up source to load.
The intelligence that so can realize loading under reserve powering mode and normal power supply pattern and the standby mode is switched, to greatest extent the operate as normal of proof load.
Above-mentioned instance only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed in
within protection scope of the present invention.
Claims (8)
- One kind the outage circuit for detecting; It is characterized in that said outage circuit for detecting is located at after the switch of power circuit, it comprises input power sensor detecting circuit, input characteristics circuit for detecting, control circuit, power supply commutation circuit and back-up source; The input power sensor detecting circuit is the outage circuit for detecting; Be used to detect civil power and whether interrupt, the impedance of input characteristics circuit for detecting detecting input, the detecting result of input power sensor detecting circuit, input characteristics circuit for detecting all is sent to control circuit; The work that control circuit is controlled the power supply commutation circuit according to the detecting result whether, said back-up source links to each other with the power supply commutation circuit.
- 2. according to the described a kind of outage circuit for detecting of claim; It is characterized in that; Said power circuit comprises power supply, the switch that links to each other with power supply, load and the AC/DC change-over circuit of being located at the load front end; Said input characteristics circuit for detecting, input power sensor detecting circuit are located between switch and the AC/DC change-over circuit, and the power supply commutation circuit is located between AC/DC change-over circuit and the load.
- 3. an outage method for detecting that matches with the said outage circuit for detecting of claim is characterized in that, the step of the detecting of specifically cutting off the power supply is following:When the input power sensor detecting circuit is measured power failure; Control circuit is opened the work of input characteristics circuit for detecting; If the input characteristics circuit for detecting is judged switch closure, then will detect the result and return to control circuit, the control circuit commutation circuit of will supplying power switches to back-up source and supplies power; The switching of commutation circuit if the disconnection of input characteristics circuit for detecting mensuration switch, control circuit are not then supplied power;Reply when the input power sensor detecting circuit records power supply, pass to control circuit, control circuit cuts out the input characteristics circuit for detecting.
- 4. according to the described outage method for detecting of claim; It is characterized in that when power supply interrupted for some reason, voltage descended between the positive-negative power line; The input power sensor detecting circuit detects outage and takes place; Pass to control circuit, control circuit is power-on characteristic detecting circuit immediately, and the complex impedance that the power supply characteristic circuit for detecting detects between the power line is low resistive state; Judge that promptly power failure is because of power supply trouble takes place, control circuit is promptly controlled the power supply commutation circuit and is switched to back-up source load is supplied power.
- 5. according to the described outage method for detecting of claim; It is characterized in that in the time of the artificial disconnection of switch, the voltage between the positive-negative power line descends; The input power sensor detecting circuit detects outage and takes place; Pass to control circuit, control circuit is power-on characteristic detecting circuit immediately, and the complex impedance that the power supply characteristic circuit for detecting detects between the power line is high-impedance state; Judge that promptly power failure is because of artificial stopcock causes, control circuit control power supply commutation circuit does not switch to the back-up source powering load.
- 6. according to the described outage method for detecting of claim, it is characterized in that equipment quits work; Switch breaks off, and power supply is also under the situation of unavailability, when user's close switch; After the power supply characteristic circuit for detecting that is in holding state detected switch closure, the characteristic between the positive-negative power line changed and is low resistive state, and the power supply characteristic circuit for detecting is judged to be user's close switch; Control circuit drives the power supply commutation circuit and switches to back-up source, to electric.
- 7. according to the described outage method for detecting of claim; It is characterized in that, when power supply recovers to supply not yet, user's cut-off switch; The characteristic changing that the power supply characteristic circuit for detecting detects between the positive-negative power line is a high-impedance state; The power supply characteristic circuit for detecting is judged to be switch and breaks off, and belongs to the user and initiatively closes load, and control circuit drives the power supply commutation circuit and cuts out the power supply of back-up source to load.
- 8. according to the described outage method for detecting of claim, it is characterized in that, when load is in the work of power backup pattern, switch closure, power up, input power sensor detecting circuit Drive and Control Circuit, control circuit drives the power supply commutation circuit and switches to the power supply power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101369033A CN102664451A (en) | 2012-05-04 | 2012-05-04 | Power failure detection circuit and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101369033A CN102664451A (en) | 2012-05-04 | 2012-05-04 | Power failure detection circuit and detection method thereof |
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| CN2012101369033A Pending CN102664451A (en) | 2012-05-04 | 2012-05-04 | Power failure detection circuit and detection method thereof |
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Cited By (7)
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| CN103576587A (en) * | 2012-08-10 | 2014-02-12 | 洪志儒 | Circuit capable of changing load operation function in temporary outage mode |
| CN104582127A (en) * | 2014-08-26 | 2015-04-29 | 江苏芯光能源管理有限公司 | Emergency lighting system with end remaining function |
| CN108260261A (en) * | 2017-12-01 | 2018-07-06 | 李峰 | A kind of emergency lighting circuit and lamps and lanterns |
| WO2019173977A1 (en) * | 2018-03-13 | 2019-09-19 | 深圳配天智能技术研究院有限公司 | Robot control system, power monitoring method, robot and storage apparatus |
| CN110568318A (en) * | 2019-10-22 | 2019-12-13 | 南昌航空大学 | Line load and fault detection device and method |
| CN110726893A (en) * | 2019-11-11 | 2020-01-24 | 河海大学常州校区 | Automatic detection device and detection method for line fault and load |
| CN113872327A (en) * | 2021-09-26 | 2021-12-31 | 苏州浪潮智能科技有限公司 | Input power supply monitoring device, system and method |
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| CN201887527U (en) * | 2010-11-08 | 2011-06-29 | 创扬科技股份有限公司 | Uninterrupted power supply detecting device |
| CN202197427U (en) * | 2011-07-19 | 2012-04-18 | 深圳市三迅光电有限公司 | LED emergency lighting lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103576587A (en) * | 2012-08-10 | 2014-02-12 | 洪志儒 | Circuit capable of changing load operation function in temporary outage mode |
| CN104582127A (en) * | 2014-08-26 | 2015-04-29 | 江苏芯光能源管理有限公司 | Emergency lighting system with end remaining function |
| CN108260261A (en) * | 2017-12-01 | 2018-07-06 | 李峰 | A kind of emergency lighting circuit and lamps and lanterns |
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| CN110726893A (en) * | 2019-11-11 | 2020-01-24 | 河海大学常州校区 | Automatic detection device and detection method for line fault and load |
| CN113872327A (en) * | 2021-09-26 | 2021-12-31 | 苏州浪潮智能科技有限公司 | Input power supply monitoring device, system and method |
| CN113872327B (en) * | 2021-09-26 | 2023-08-18 | 苏州浪潮智能科技有限公司 | Input power supply monitoring device, system and method |
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Application publication date: 20120912 |