CN102520307B - Power-off automatic identification circuit - Google Patents
Power-off automatic identification circuit Download PDFInfo
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- CN102520307B CN102520307B CN2011104363655A CN201110436365A CN102520307B CN 102520307 B CN102520307 B CN 102520307B CN 2011104363655 A CN2011104363655 A CN 2011104363655A CN 201110436365 A CN201110436365 A CN 201110436365A CN 102520307 B CN102520307 B CN 102520307B
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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
- 238000000034 method Methods 0.000 description 2
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- 238000002955 isolation 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 power-off automatic identification circuit.
Background technology
With the light fixture of back-up source, all can't autonomous classification be that grid cut-off or user disconnect electrical network and initiatively turn off the light at present, so the particular form light modulations such as special switch or use remote control can only be set in addition, for the user, on original circuit, reequip very trouble, even can't reequip.
Also there is partial design to attempt to judge whether to be connected on electrical network by the mode that electric resistance partial pressure detects, but the scope of application of this mode is very limited, be only suitable for existing in the electrical network end occasion of resistance loop, in case be the power down that broken string causes, as the electrical network end, do not exist the load of other strip resistance character can detect failure.And present most of electrical equipment all uses the Switching Power Supply power supply, shows that in fact the electrical network input end is capacitive load.Use simultaneously level dividing potential drop mode to detect, if on same circuit and connect after this circuit of some due to the stack of electric current, in fact can't detect.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of power-off automatic identification circuit that can effectively judge electrical network inlet wire state, it can facilitate the circuit repacking after increasing back-up source of various light fixtures and consumer.
In order to achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of power-off 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 electrically connected by current-limiting resistance and signal generator, and signal generator also is electrically connected with testing circuit; During outage, electrical network inlet wire state is detected: signal generator produces a pulse detection signals, this pulse detection signals is delivered on the electrical network inlet wire through current-limiting resistance, simultaneously, 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 judges electrical network inlet wire state according to amplitude or the wave form varies of contrast signal.
Preferably, described pulse detection signals is comprised of one or more pulses.
Preferably, described testing circuit judges that according to amplitude or the wave form varies of contrast signal the concrete steps of electrical network inlet wire state are: if the decay to a certain degree of the amplitude of contrast signal or waveform generation, testing circuit judgement electrical network inlet wire state is and net state; If contrast signal shows as high-impedance state, testing circuit judgement electrical network inlet wire state is the suspension state.
Preferably, described 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 are electrically connected 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 to latch cicuit.
Preferably, signal generator and testing circuit are integrated in the circuit that consists 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 are electrically connected successively, single-chip microcomputer also is electrically connected by 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 connect also and can not produce the phase mutual interference affects its normal detection.For a large amount of light fixtures the system that connects, as street lamp, market, office space, factory etc., have a good application prospect.
The accompanying drawing explanation
Fig. 1 is the principle schematic of the power-off automatic identification circuit of the embodiment of the present invention;
Fig. 2 is the circuit block diagram of application example one of the power-off automatic identification circuit of the embodiment of the present invention;
Fig. 3 is the circuit block diagram of application example two of the power-off automatic identification circuit of the embodiment of the present invention.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the present invention is described further, so that clearerly understand the present invention's technological thought required for protection.
As shown in Figure 1, a kind of power-off automatic identification circuit, it comprises signal generator, current-limiting resistance and testing circuit.Testing circuit is connected across between electrical network inlet wire L, electrical network inlet wire N, and electrical network inlet wire L(can be also electrical network inlet wire N) by current-limiting resistance and signal generator, be electrically connected, signal generator also is electrically connected with testing circuit.
The power-off automatic identification circuit of the present embodiment can be connected in the circuit of various light fixtures with back-up source and consumer, when light fixture or consumer outage, be used to judging electrical network inlet wire state, to control the keying of back-up source.Described electrical network inlet wire state comprises and net state and suspension state, and net state refers to that the state of electrical network inlet wire and switch closure (is that light fixture or consumer are under normal service condition, the state that electrical network breaks down or has a power failure), the suspension state refers to the state (namely artificially switch and electrical network inlet wire are unpluged, 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 the present embodiment is: during outage, electrical network inlet wire state is detected: signal generator produces a pulse detection signals, this pulse detection signals is delivered on the electrical network inlet wire through current-limiting resistance, simultaneously, 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 judges electrical network inlet wire state according to amplitude or the wave form varies of contrast signal.Concrete, if the electrical network inlet wire exist equivalent resistance or equivalent capacity pulse signal can produce decay to a certain degree, i.e. the amplitude of contrast signal or waveform generation decay to a certain degree, testing circuit judgement electrical network inlet wire state be net state also; If contrast signal shows as high-impedance state, testing circuit judgement 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), by this operating circuit, is controlled the open/close states of back-up source.
Above-mentioned pulse detection signals can be comprised of one or more pulses.
According to above-mentioned principle in detail, the implementation procedure of the present embodiment is described in detail 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 are electrically connected 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 to latch cicuit.The current limiting pressure-limiting circuit is for the protection of comparator circuit.Integrating circuit is for eliminating line-hit.
The course of work is: during outage, the pulse detection signals that signal generator produces is sent in electrical network inlet wire L and comparator circuit simultaneously, and simultaneously, signal generator also produces a latch signal to latch cicuit.Comparator circuit is compared to contrast signal and pulse detection signals, and the comparison after signal to latch cicuit, latch cicuit is the judgement signal of stable output under the control of latch signal.
Application example two
As shown in Figure 3, signal generator and testing circuit are integrated in the circuit that consists 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 are electrically connected successively, single-chip microcomputer also is electrically connected by 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 having adopted single-chip microcomputer, so the generation of pulse detection signals and judgement processing etc. all realize by software in single-chip microcomputer inside.The pulse detection signals that single-chip microcomputer produces is just delivered on electrical network inlet wire L through current-limiting resistance after the overdrive circuit isolation.Contrast signal is converted into after digital signal and just delivers to single-chip microcomputer and judge and process by analog to digital conversion circuit through the current limiting pressure-limiting circuit.Single-chip microcomputer is externally exported the judgement signal.
Because the present embodiment adopts the burst detection mode, as long as coordinate assay intervals and output power, even a large amount of testing circuit connect also and can not produce the phase mutual interference affects its normal detection.For a large amount of light fixtures the system that connects, as street lamp, market, office space, factory etc., have a good application prospect.
In addition, before the power-off automatic identification circuit of the present embodiment can be used in rectification or after rectification, do not affect the detection effect of the present embodiment, the scope of application is wider.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and the distortion all should belong to the protection domain of the claims in the present invention within.
Claims (4)
1. power-off 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 electrically connected by current-limiting resistance and signal generator, and signal generator also is electrically connected with testing circuit; During outage, electrical network inlet wire state is detected: signal generator produces a pulse detection signals, this pulse detection signals is delivered on the electrical network inlet wire through current-limiting resistance, simultaneously, 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 judges electrical network inlet wire state according to amplitude or the wave form varies of contrast signal;
Described testing circuit judges that according to amplitude or the wave form varies of contrast signal the concrete steps of electrical network inlet wire state are: if the decay to a certain degree of the amplitude of contrast signal or waveform generation, testing circuit judgement electrical network inlet wire state is and net state; If contrast signal shows as high-impedance state, testing circuit judgement electrical network inlet wire state is the suspension state.
2. power-off automatic identification circuit as claimed in claim 1, is characterized in that, described pulse detection signals is comprised of one or more pulses.
3. power-off automatic identification circuit as claimed in claim 1 or 2, it is characterized in that, described 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 are electrically connected 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 to latch cicuit.
4. power-off automatic identification circuit as claimed in claim 1 or 2, it is characterized in that, signal generator and testing circuit are integrated in the circuit that consists 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 are electrically connected successively, single-chip microcomputer also is electrically connected by 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 |
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| 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 |
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| CN102520307A CN102520307A (en) | 2012-06-27 |
| CN102520307B true CN102520307B (en) | 2013-11-20 |
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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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4710739B2 (en) * | 2006-06-30 | 2011-06-29 | 株式会社デンソー | Load disconnection detection circuit |
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2011
- 2011-12-22 CN CN2011104363655A patent/CN102520307B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN102520307A (en) | 2012-06-27 |
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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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