CN102520307A - Power-off automatic identification circuit - Google Patents
Power-off automatic identification circuit Download PDFInfo
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- CN102520307A CN102520307A CN2011104363655A CN201110436365A CN102520307A CN 102520307 A CN102520307 A CN 102520307A CN 2011104363655 A CN2011104363655 A CN 2011104363655A CN 201110436365 A CN201110436365 A CN 201110436365A CN 102520307 A CN102520307 A CN 102520307A
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- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 5
- 238000003556 assay Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
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Abstract
The invention relates to a power-off automatic identification circuit comprising a signal generator, a current-limiting resistor and a detection circuit. The detection circuit is connected across two power grid inlet wires and one of the two power grid inlet wires is electrically connected with the signal generator by the current-limiting resistor; and the signal generator is electrically connected with the detection circuit. The signal generator generates a pulse detection signal that is sent to the power grid inlet wire by the current-limiting resistor and is simultaneously sent to the detection circuit; the pulse detection signal that flows through the power grid inlet wire becomes a comparison signal; the detection circuit carries out comparison on the pulse detections signal and the comparison signal as well as determines a power grid inlet wire state according to an amplitude change or a waveform change of the comparison signal. According to the invention, an emergent pulse detection mode is employed; as long as detection intervals and output powers are coordinated, even though lots of detection circuits are in parallel connection, the detection circuits will not interfere with each other and normal detection will not be influenced.
Description
Technical field
The present invention relates to identification circuit, be specifically related to a kind of outage automatic identification circuit.
Background technology
At present the light fixture of band back-up source all can't autonomous classification be that grid cut-off or user break off electrical network and initiatively turn off the light; So can only being set in addition, special switch perhaps uses particular form light modulations such as remote control; On original circuit, reequip very trouble for the user, even can't reequip.
Also there is partial design to attempt to judge whether to be connected on the electrical network through the mode that electric resistance partial pressure detects; But the scope of application of this mode is very limited; Only be suitable for the occasion that there is resistance loop in the electrical network end; In case be the power down that broken string causes, do not exist the load of other strip resistance character then can detect failure like the electrical network end.And present most of electrical equipment all uses the Switching Power Supply power supply, shows that in fact the electrical network input end is a capacitive load.Use level dividing potential drop mode to detect simultaneously, if on the same circuit and connect behind this circuit of some because the stack of electric current in fact can't detect.
Summary of the invention
In order to overcome the deficiency of prior art, the object of the present invention is to provide a kind of outage automatic identification circuit that can effectively judge electrical network inlet wire state, it can make things convenient for the circuit repacking after increasing back-up source of various light fixtures and consumer.
In order to achieve the above object, the technical scheme that the present invention adopted is following:
A kind of outage automatic identification circuit, it comprises signal generator, current-limiting resistance and testing circuit; Testing circuit is connected across between two electrical network inlet wires, and an electrical network inlet wire in two electrical network inlet wires is through current-limiting resistance and signal generator electric connection, and signal generator also electrically connects with testing circuit; During outage; Electrical network inlet wire state is detected: signal generator produces a pulse detection signals, and this pulse detection signals is delivered on the electrical network inlet wire, simultaneously through current-limiting resistance; This pulse detection signals is also delivered to testing circuit; The pulse detection signals of electrical network inlet wire of flowing through becomes contrast signal, and testing circuit paired pulses detection signal and contrast signal are compared, and testing circuit is judged electrical network inlet wire state according to the amplitude or the wave form varies of contrast signal.
Preferably, said pulse detection signals is made up of one or more pulses.
Preferably, said testing circuit judges that according to the amplitude or the wave form varies of contrast signal the concrete steps of electrical network inlet wire state are: if the amplitude or the waveform generation decay to a certain degree of contrast signal, then testing circuit judges that electrical network inlet wire state is and net state; If contrast signal shows as high-impedance state, then testing circuit judges that electrical network inlet wire state is the suspension state.
Preferably, said testing circuit comprises current limiting pressure-limiting circuit, comparator circuit, integrating circuit, latch cicuit, and current limiting pressure-limiting circuit, comparator circuit, integrating circuit, latch cicuit electrically connect successively; The current limiting pressure-limiting circuit is connected across between two electrical network inlet wires; The pulse detection signals that signal generator produces is sent comparator circuit to, and signal generator also produces a latch signal and gives latch cicuit.
Preferably; Signal generator and testing circuit are integrated in the circuit that is made up of current limiting pressure-limiting circuit, analog to digital conversion circuit, single-chip microcomputer, driving circuit; Current limiting pressure-limiting circuit, analog to digital conversion circuit, single-chip microcomputer electrically connect successively; Single-chip microcomputer also electrically connects through driving circuit and current-limiting resistance, and the current limiting pressure-limiting circuit is connected across between two electrical network inlet wires; Pulse detection signals is produced by single-chip microcomputer, and pulse detection signals and contrast signal are compared by single-chip microcomputer.
The present invention compared with prior art adopts the burst detection mode, as long as coordinate assay intervals and output power, even a large amount of testing circuit and connect also and can not produce the phase mutual interference influences its normal detection.For a large amount of light fixtures and the system that connects, have a good application prospect like street lamp, market, office space, factory etc.
Description of drawings
Fig. 1 is the principle schematic of the outage automatic identification circuit of the embodiment of the invention;
Fig. 2 is the circuit block diagram of application example one of the outage automatic identification circuit of the embodiment of the invention;
Fig. 3 is the circuit block diagram of application example two of the outage automatic identification circuit of the embodiment of the invention.
Embodiment
Below, in conjunction with accompanying drawing and embodiment, the present invention done further describing, so that clearerly understand the present invention's technological thought required for protection.
As shown in Figure 1, a kind of outage automatic identification circuit, it comprises signal generator, current-limiting resistance and testing circuit.Testing circuit is connected across between electrical network inlet wire L, the electrical network inlet wire N, and electrical network inlet wire L (also can be electrical network inlet wire N) electrically connects through current-limiting resistance and signal generator, and signal generator also electrically connects with testing circuit.
The outage automatic identification circuit of present embodiment can be connected in the circuit of various light fixtures with back-up source and consumer, when light fixture or consumer outage, is used to judge electrical network inlet wire state, with the keying of control back-up source.Said electrical network inlet wire state comprises and net state and suspension state; And net state is meant that the state of electrical network inlet wire and switch closure (is that light fixture or consumer are under normal operating position; The state that electrical network breaks down or has a power failure); The suspension state is meant the state (promptly unplug switch and electrical network inlet wire artificially, initiatively cut away the state of light fixture or consumer power supply) that electrical network inlet wire and switch terminals are opened.
The principle of work of present embodiment is: during outage; Electrical network inlet wire state is detected: signal generator produces a pulse detection signals, and this pulse detection signals is delivered on the electrical network inlet wire, simultaneously through current-limiting resistance; This pulse detection signals is also delivered to testing circuit; The pulse detection signals of electrical network inlet wire of flowing through becomes contrast signal, and testing circuit paired pulses detection signal and contrast signal are compared, and testing circuit is judged electrical network inlet wire state according to the amplitude or the wave form varies of contrast signal.Concrete, if the electrical network inlet wire exist equivalent resistance or equivalent capacity then pulse signal can produce decay to a certain degree, i.e. the amplitude of contrast signal or waveform generation decay to a certain degree, then testing circuit judges that electrical network inlet wire state be a net state also; If contrast signal shows as high-impedance state, then testing circuit judges that electrical network inlet wire state is the suspension state.Testing circuit is exported to next operating circuit to judgement signal (being the result of electrical network inlet wire state), is controlled the keying state of back-up source by this operating circuit.
Above-mentioned pulse detection signals can be made up of one or more pulses.
According to above-mentioned principle, the implementation procedure of present embodiment is detailed with concrete application example below.
Application example one
As shown in Figure 2, testing circuit comprises current limiting pressure-limiting circuit, comparator circuit, integrating circuit, latch cicuit, and current limiting pressure-limiting circuit, comparator circuit, integrating circuit, latch cicuit electrically connect successively; The current limiting pressure-limiting circuit is connected across between two electrical network inlet wires; The pulse detection signals that signal generator produces is sent comparator circuit to, and signal generator also produces a latch signal and gives latch cicuit.The current limiting pressure-limiting circuit is used to protect comparator circuit.Integrating circuit is used to eliminate circuit to be disturbed.
The course of work is: during outage, the pulse detection signals that signal generator produces is sent in electrical network inlet wire L and the comparator circuit simultaneously, and simultaneously, signal generator also produces a latch signal and gives latch cicuit.Comparator circuit is compared to contrast signal and pulse detection signals, and gives latch cicuit the signal after the comparison, and latch cicuit is the stable judgement signal of output under the control of latch signal then.
Application example two
As shown in Figure 3; Signal generator and testing circuit are integrated in the circuit that is made up of current limiting pressure-limiting circuit, analog to digital conversion circuit, single-chip microcomputer, driving circuit; Current limiting pressure-limiting circuit, analog to digital conversion circuit, single-chip microcomputer electrically connect successively; Single-chip microcomputer also electrically connects through driving circuit and current-limiting resistance, and the current limiting pressure-limiting circuit is connected across between two electrical network inlet wires; Pulse detection signals is produced by single-chip microcomputer, and pulse detection signals and contrast signal are compared by single-chip microcomputer.
The course of work is: owing to adopted single-chip microcomputer, so the generation of pulse detection signals and judgment processing etc. all realize through software in single-chip microcomputer inside.The pulse detection signals that single-chip microcomputer produces is just delivered on the electrical network inlet wire L through current-limiting resistance after overdrive circuit is isolated.Contrast signal through the current limiting pressure-limiting circuit after analog to digital conversion circuit be converted into and just deliver to single-chip microcomputer after the digital signal and judge and handle.Single-chip microcomputer is externally exported the judgement signal.
Because present embodiment adopts the burst detection mode, as long as coordinate assay intervals and output power, even a large amount of testing circuit and connect also and can not produce the phase mutual interference influences its normal detection.For a large amount of light fixtures and the system that connects, have a good application prospect like street lamp, market, office space, factory etc.
In addition, the outage automatic identification circuit of present embodiment can be used in before the rectification or after the rectification, not influence the detection effect of present embodiment, and the scope of application is wider.
For a person skilled in the art, can make other various corresponding changes and distortion, and these all changes and distortion should belong within the protection domain of claim of the present invention all according to the technical scheme and the design of above description.
Claims (5)
1. the outage automatic identification circuit is characterized in that, comprises signal generator, current-limiting resistance and testing circuit; Testing circuit is connected across between two electrical network inlet wires, and an electrical network inlet wire in two electrical network inlet wires is through current-limiting resistance and signal generator electric connection, and signal generator also electrically connects with testing circuit; During outage; Electrical network inlet wire state is detected: signal generator produces a pulse detection signals, and this pulse detection signals is delivered on the electrical network inlet wire, simultaneously through current-limiting resistance; This pulse detection signals is also delivered to testing circuit; The pulse detection signals of electrical network inlet wire of flowing through becomes contrast signal, and testing circuit paired pulses detection signal and contrast signal are compared, and testing circuit is judged electrical network inlet wire state according to the amplitude or the wave form varies of contrast signal.
2. outage automatic identification circuit as claimed in claim 1 is characterized in that said pulse detection signals is made up of one or more pulses.
3. outage automatic identification circuit as claimed in claim 1; It is characterized in that; Said testing circuit judges that according to the amplitude or the wave form varies of contrast signal the concrete steps of electrical network inlet wire state are: if the amplitude or the waveform generation decay to a certain degree of contrast signal, then testing circuit judges that electrical network inlet wire state is and net state; If contrast signal shows as high-impedance state, then testing circuit judges that electrical network inlet wire state is the suspension state.
4. like claim 1 or 2 or 3 described outage automatic identification circuits; It is characterized in that; Said testing circuit comprises current limiting pressure-limiting circuit, comparator circuit, integrating circuit, latch cicuit, and current limiting pressure-limiting circuit, comparator circuit, integrating circuit, latch cicuit electrically connect successively; The current limiting pressure-limiting circuit is connected across between two electrical network inlet wires; The pulse detection signals that signal generator produces is sent comparator circuit to, and signal generator also produces a latch signal and gives latch cicuit.
5. like claim 1 or 2 or 3 described outage automatic identification circuits; It is characterized in that; Signal generator and testing circuit are integrated in the circuit that is made up of current limiting pressure-limiting circuit, analog to digital conversion circuit, single-chip microcomputer, driving circuit; Current limiting pressure-limiting circuit, analog to digital conversion circuit, single-chip microcomputer electrically connect successively, and single-chip microcomputer also electrically connects through driving circuit and current-limiting resistance, and the current limiting pressure-limiting circuit is connected across between two electrical network inlet wires; Pulse detection signals is produced by single-chip microcomputer, and pulse detection signals and contrast signal are compared by single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104363655A CN102520307B (en) | 2011-12-22 | 2011-12-22 | Power-off automatic identification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104363655A CN102520307B (en) | 2011-12-22 | 2011-12-22 | Power-off automatic identification circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102520307A true CN102520307A (en) | 2012-06-27 |
| CN102520307B CN102520307B (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104363655A Expired - Fee Related CN102520307B (en) | 2011-12-22 | 2011-12-22 | Power-off automatic identification circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080001606A1 (en) * | 2006-06-30 | 2008-01-03 | Denso Corporation | Load break detection circuit |
| CN101266277A (en) * | 2008-04-24 | 2008-09-17 | 中兴通讯股份有限公司 | DC switch protective circuit switching detection device and method |
| CN101369550A (en) * | 2008-08-12 | 2009-02-18 | 中国电子科技集团公司第四十五研究所 | Gold thread break detection apparatus of full-automatic lead bonding machine |
| CN202002964U (en) * | 2010-12-16 | 2011-10-05 | 上海巍翔电气控制有限公司 | Detection circuit for power grid power failures |
-
2011
- 2011-12-22 CN CN2011104363655A patent/CN102520307B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080001606A1 (en) * | 2006-06-30 | 2008-01-03 | Denso Corporation | Load break detection circuit |
| CN101266277A (en) * | 2008-04-24 | 2008-09-17 | 中兴通讯股份有限公司 | DC switch protective circuit switching detection device and method |
| CN101369550A (en) * | 2008-08-12 | 2009-02-18 | 中国电子科技集团公司第四十五研究所 | Gold thread break detection apparatus of full-automatic lead bonding machine |
| CN202002964U (en) * | 2010-12-16 | 2011-10-05 | 上海巍翔电气控制有限公司 | Detection circuit for power grid power failures |
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| Publication number | Publication date |
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| CN102520307B (en) | 2013-11-20 |
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Owner name: ZHU YONGCAI Free format text: FORMER OWNER: GUANGZHOU XUFENG ELECTRONIC PRODUCT COMPANY LTD. Effective date: 20140507 |
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Effective date of registration: 20140507 Address after: Two street 511434 Guangdong city of Guangzhou Province Hualong Town Zhujianglu Road Area No. 59 Patentee after: Zhu Yongcai Address before: 510000, Guangdong, Guangzhou, Panyu District Tai Lung Street, tea East, one of the main street Patentee before: Guangzhou Xufeng Electronic Products Co.,Ltd. |
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Effective date of registration: 20160425 Address after: 511000 Guangdong city of Guangzhou province Panyu District Sha Tau Street, West Ring Road Xili Industrial Zone Patentee after: Guangzhou long self Electric Appliance Co.,Ltd. Address before: Two street 511434 Guangdong city of Guangzhou Province Hualong Town Zhujianglu Road Area No. 59 Patentee before: Zhu Yongcai |
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Correction item: Patentee|Address Correct: GUANGZHOU LONGZIAN ELECTRIC Co.,Ltd.|511000 Guangdong city of Guangzhou province Panyu District Sha Tau Street, West Ring Road Xili Industrial Zone False: Guangzhou long self Electric Appliance Co.,Ltd.|511000 Guangdong city of Guangzhou province Panyu District Sha Tau Street, West Ring Road Xili Industrial Zone Number: 20 Volume: 32 |
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Granted publication date: 20131120 |