CN114184827A - Alternating current flash detection circuit and intelligent switch - Google Patents
Alternating current flash detection circuit and intelligent switch Download PDFInfo
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- CN114184827A CN114184827A CN202111216188.XA CN202111216188A CN114184827A CN 114184827 A CN114184827 A CN 114184827A CN 202111216188 A CN202111216188 A CN 202111216188A CN 114184827 A CN114184827 A CN 114184827A
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- 238000001514 detection method Methods 0.000 title claims abstract description 89
- 230000009466 transformation Effects 0.000 claims abstract description 11
- 230000001131 transforming effect Effects 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005693 optoelectronics Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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Abstract
The invention relates to an alternating current flash detection circuit and an intelligent switch. The input end of a voltage transformation circuit in the alternating current flash detection circuit is connected with an alternating current power supply, the output end of the voltage transformation circuit is connected with the input end of a rectification circuit, the output end of the rectification circuit is connected with the input end of a current limiting circuit, and the output end of the current limiting circuit is connected with the input end of a power failure detection output circuit; the transformer circuit is used for transforming the input alternating voltage, the rectifier circuit is used for rectifying the transformed alternating current into direct current, the current limiting circuit is used for limiting the direct current, the power failure detection output circuit is used for generating a detection signal according to the change of the direct current, and whether the input alternating current is in a flash failure or not is judged according to the detection signal. The invention can realize alternating current flash detection and improve the intelligent level of the intelligent switch.
Description
Technical Field
The invention relates to the field of intelligent switches, in particular to an alternating current flash-off detection circuit and an intelligent switch.
Background
Along with the rapid development of the intellectualization of electrical equipment, the switch gradually realizes the intellectualization, the intelligent switch can realize the control of a functional module according to the alternating current flash, and how to detect the alternating current flash is a technical problem to be solved.
Disclosure of Invention
The present invention provides an ac flicker detection circuit and an intelligent switch, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: an alternating current flash detection circuit is constructed, and comprises a voltage transformation circuit, a rectification circuit, a current limiting circuit and a power failure detection output circuit;
the input end of the voltage transformation circuit is connected with an alternating current power supply, the output end of the voltage transformation circuit is connected with the input end of the rectification circuit, the output end of the rectification circuit is connected with the input end of the current limiting circuit, and the output end of the current limiting circuit is connected with the input end of the power failure detection output circuit;
the transformer circuit is used for transforming the input alternating voltage, the rectifier circuit is used for rectifying the transformed alternating current into direct current, the current limiting circuit is used for limiting the direct current, the power failure detection output circuit is used for generating a detection signal according to the change of the direct current, and the detection signal is used for judging whether the input alternating current is in a flash failure state or not.
Further, in the ac flicker detection circuit according to the present invention, the transformer circuit includes a transformer T1, a primary winding of the transformer T1 is connected to an ac power source, and a secondary winding of the transformer T1 is connected to an input terminal of the rectifier circuit.
Further, in the alternating current flicker detection circuit of the present invention, the rectifier circuit includes a diode D1, a diode D2, a diode D3, and a diode D4;
the cathode of the diode D1 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with the cathode of the diode D4, and the anode of the diode D4 is connected with the anode of the diode D1; the cathode of the diode D1 and the cathode of the diode D4 are respectively connected with the output end of the voltage transformation circuit, the anode of the diode D1 is grounded, and the cathode of the diode D2 is connected with the input end of the current limiting circuit.
Further, in the ac flash detection circuit of the present invention, the current limiting circuit is a current limiting resistor R1, a first end of the current limiting resistor R1 is connected to the output end of the rectification circuit, and a second end of the current limiting resistor R1 is connected to the input end of the power failure detection output circuit.
Further, in the ac flash detection circuit of the present invention, the power failure detection output circuit includes a photocoupler U1 and a resistor R2;
a first input end of the photoelectric coupler U1 is connected with an output end of the current limiting circuit, and a second input end of the photoelectric coupler U1 is grounded; the first output end of the photoelectric coupler U1 is connected with a voltage power supply end VCC through the resistor R2, the second output end of the photoelectric coupler U1 is grounded, and the first output end of the photoelectric coupler U1 generates the detection signal.
Further, in the ac flash detection circuit of the present invention, the power failure detection output circuit further includes a capacitor C1, and the first output terminal of the photocoupler U1 is grounded through the capacitor C1.
Further, in the ac flicker detection circuit according to the present invention, it is determined that the input ac power is flashed if the detection signal is a dc voltage signal.
In addition, the invention also provides an intelligent switch which comprises the alternating current flash detection circuit.
Furthermore, in the intelligent switch of the present invention, the intelligent switch further includes a controller, an input pin of the controller is connected to an output terminal of the power failure detection output circuit in the alternating current flash detection circuit, and the controller controls the functional module of the intelligent switch according to the detection signal.
Further, in the intelligent switch of the present invention, the intelligent switch further includes a switch, and an input terminal of the voltage-changing circuit in the ac flicker detection circuit is connected to an ac power supply through the switch.
The alternating current flash detection circuit and the intelligent switch have the following beneficial effects that: the invention can realize alternating current flash detection and improve the intelligent level of the intelligent switch.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic circuit diagram of an AC flash detection circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of an AC flash detection circuit according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of an AC flicker detection circuit according to an embodiment of the present invention;
fig. 4 is a circuit schematic diagram of an intelligent switch according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
In a preferred embodiment, referring to fig. 1, the AC flash detection circuit of this embodiment includes a transformer circuit 10, a rectifier circuit 20, a current limiting circuit 30, and a power failure detection output circuit 40, wherein an input terminal of the transformer circuit 10 is connected to an AC power supply (AC in fig. 1), an output terminal of the transformer circuit 10 is connected to an input terminal of the rectifier circuit 20, an output terminal of the rectifier circuit 20 is connected to an input terminal of the current limiting circuit 30, and an output terminal of the current limiting circuit 30 is connected to an input terminal of the power failure detection output circuit 40.
The working principle of the alternating current flash detection circuit is as follows: the transformer circuit 10 is used for transforming the input alternating voltage, the rectifier circuit 20 is used for rectifying the transformed alternating current into direct current, the current limiting circuit 30 is used for limiting the direct current, the power failure detection output circuit 40 is used for generating a detection signal according to the change of the direct current, and the alternating current power supply does not have flash failure and the corresponding detection signal is different when the flash failure occurs, so that whether the flash failure occurs to the input alternating current can be judged according to the detection signal.
The embodiment can realize alternating current flash detection and improve the intelligent level of the intelligent switch.
In the ac flicker detection circuit of some embodiments, referring to fig. 2, the transformer circuit 10 includes a transformer T1, a primary winding of the transformer T1 is connected to an ac power supply (ACN and ACL in fig. 2), and a secondary winding of the transformer T1 is connected to an input end of the rectifier circuit 20, so that the transformer T1 is used to change the voltage of the ac power supply, and boost or buck is implemented to meet the requirements of the subsequent circuit. Alternatively, the ratio of the number of turns of the primary coil to the number of turns of the secondary coil of the transformer T1 is n: and m is selected. Alternatively, the primary winding of the transformer T1 is connected to an ac power source through a fuse F1.
In some embodiments of the ac flicker detection circuit, referring to fig. 2, the rectifier circuit 20 includes a diode D1, a diode D2, a diode D3, and a diode D4, a cathode of the diode D1 is connected to an anode of the diode D2, a cathode of the diode D2 is connected to a cathode of the diode D3, an anode of the diode D3 is connected to a cathode of the diode D4, and an anode of the diode D4 is connected to an anode of the diode D1. The cathode of the diode D1 and the cathode of the diode D4 are respectively connected to the output terminal of the transformer circuit 10, the anode of the diode D1 is grounded, and the cathode of the diode D2 is connected to the input terminal of the current limiting circuit 30.
In some embodiments of the ac glitch detection circuit, referring to fig. 2, the current limiting circuit 30 is a current limiting resistor R1, a first terminal of the current limiting resistor R1 is connected to the output terminal of the rectification circuit 20, and a second terminal of the current limiting resistor R1 is connected to the input terminal of the power failure detection output circuit 40. The current limiting is realized by only one resistor, and the circuit is simple and low in cost.
In some embodiments of the ac flicker detection circuit, referring to fig. 2, the power failure detection output circuit 40 includes a photo coupler U1 and a resistor R2, a first input terminal of the photo coupler U1 is connected to the output terminal of the current limiting circuit 30, and a second input terminal of the photo coupler U1 is grounded. The first output terminal of optoelectronic coupler U1 passes through resistance R2 and connects voltage supply terminal VCC, and optoelectronic coupler U1's second output terminal ground connection, optoelectronic coupler U1's first output terminal produces detection signal. The working principle of the alternating current flash detection circuit of the embodiment is as follows: when the alternating current power supply is not flashed, a detection signal output by a first output end of the photoelectric coupler U1 is a periodically-changed square wave signal, and the frequency of the square wave is consistent with that of the alternating current power supply; when the alternating current power supply is in a flash-off state, a detection signal output by the first output end of the photoelectric coupler U1 is changed into a direct current voltage signal from a square wave signal which changes periodically. Therefore, whether the alternating current power supply is in the flash-off state can be judged by detecting the detection signal output by the first output end of the photoelectric coupler U1. That is, if a periodically changing square wave signal is detected, it is determined that the input alternating current does not flash; and if the detection signal is a direct current voltage signal, judging that the input alternating current is in flash. This embodiment realizes alternating current power supply's judgement through optoelectronic coupler, improves intelligent level of intelligent switch.
In some embodiments of the ac flicker detection circuit, referring to fig. 3, the power failure detection output circuit 40 further includes a capacitor C1, and the first output terminal of the photocoupler U1 is grounded through the capacitor C1.
In a preferred embodiment, the intelligent switch of the present embodiment includes an ac flicker detection circuit as described in the previous embodiments. The intelligent switch of this embodiment can realize that the alternating current flashes and detects, improves intelligent level of intelligent switch.
In the intelligent switch of some embodiments, referring to fig. 4, the intelligent switch further includes a controller 50, an input pin of the controller 50 is connected to the ac flicker detection circuit and the output terminal of the interruption detection output circuit 40, the controller 50 controls a functional module of the intelligent switch according to the detection signal, the functional module refers to a circuit capable of implementing a certain function, and the controller 50 can control one or more functional modules of the intelligent switch according to the detection signal.
In the intelligent switch of some embodiments, the intelligent switch further includes a switch, and an input terminal of the voltage-changing circuit 10 in the ac flicker detection circuit is connected to an ac power source through the switch.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. An alternating current flash detection circuit is characterized by comprising a voltage transformation circuit (10), a rectification circuit (20), a current limiting circuit (30) and a power failure detection output circuit (40);
the input end of the voltage transformation circuit (10) is connected with an alternating current power supply, the output end of the voltage transformation circuit (10) is connected with the input end of the rectifying circuit (20), the output end of the rectifying circuit (20) is connected with the input end of the current limiting circuit (30), and the output end of the current limiting circuit (30) is connected with the input end of the power failure detection output circuit (40);
the transformer circuit (10) is used for transforming the input alternating voltage, the rectifier circuit (20) is used for rectifying the alternating current after transformation into direct current, the current limiting circuit (30) is used for limiting the direct current, the power failure detection output circuit (40) is used for generating a detection signal according to the change of the direct current, and the detection signal is used for judging whether the input alternating current is in a flash failure state or not.
2. An alternating current flicker detection circuit according to claim 1, wherein the transformer circuit (10) comprises a transformer T1, the primary winding of the transformer T1 is connected to an alternating current power source, and the secondary winding of the transformer T1 is connected to the input of the rectifier circuit (20).
3. An alternating current flicker detection circuit according to claim 1, wherein the rectifying circuit (20) comprises a diode D1, a diode D2, a diode D3 and a diode D4;
the cathode of the diode D1 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with the cathode of the diode D4, and the anode of the diode D4 is connected with the anode of the diode D1; the cathode of the diode D1 and the cathode of the diode D4 are respectively connected with the output end of the voltage transformation circuit (10), the anode of the diode D1 is grounded, and the cathode of the diode D2 is connected with the input end of the current limiting circuit (30).
4. An alternating current flash detection circuit according to claim 1, wherein the current limiting circuit (30) is a current limiting resistor R1, a first end of the current limiting resistor R1 is connected to the output terminal of the rectification circuit (20), and a second end of the current limiting resistor R1 is connected to the input terminal of the power-off detection output circuit (40).
5. An alternating current flicker detection circuit according to claim 1, wherein the power-off detection output circuit (40) comprises a photocoupler U1 and a resistor R2;
a first input end of the photoelectric coupler U1 is connected with an output end of the current limiting circuit (30), and a second input end of the photoelectric coupler U1 is grounded; the first output end of the photoelectric coupler U1 is connected with a voltage power supply end VCC through the resistor R2, the second output end of the photoelectric coupler U1 is grounded, and the first output end of the photoelectric coupler U1 generates the detection signal.
6. An alternating current flash detection circuit according to claim 5, wherein the power failure detection output circuit (40) further comprises a capacitor C1, and the first output terminal of the optocoupler U1 is connected to ground through the capacitor C1.
7. An AC power flash detection circuit according to claim 5, wherein if said detection signal is a DC voltage signal, it is determined that the input AC power has been flashed.
8. An intelligent switch, comprising an ac flicker detection circuit according to any one of claims 1 to 7.
9. The intelligent switch of claim 8, further comprising a controller (50), wherein an input pin of the controller (50) is connected to an output terminal of the power failure detection output circuit (40) in the ac flicker detection circuit, and the controller (50) controls a functional module of the intelligent switch according to a detection signal.
10. The intelligent switch according to claim 8, further comprising a switch, wherein the input terminal of the voltage-changing circuit (10) in the alternating current flash-off detection circuit is connected to an alternating current power supply through the switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216188.XA CN114184827A (en) | 2021-10-19 | 2021-10-19 | Alternating current flash detection circuit and intelligent switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111216188.XA CN114184827A (en) | 2021-10-19 | 2021-10-19 | Alternating current flash detection circuit and intelligent switch |
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| CN114184827A true CN114184827A (en) | 2022-03-15 |
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| US6603221B1 (en) * | 1999-04-22 | 2003-08-05 | Zhongdu Liu | Solid state electrical switch |
| CN104519609A (en) * | 2013-09-26 | 2015-04-15 | 哈尔滨府明电器有限公司 | Light fixture with air quality monitoring function |
| CN212301806U (en) * | 2020-05-15 | 2021-01-05 | 北京小米移动软件有限公司 | Power on-off detection circuit |
| CN213423404U (en) * | 2020-06-01 | 2021-06-11 | 深圳和而泰智能控制股份有限公司 | Switch state detection circuit |
| CN113014082A (en) * | 2021-04-12 | 2021-06-22 | 青岛易来智能科技股份有限公司 | Low-power-consumption standby power supply, circuit, control method and intelligent product |
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2021
- 2021-10-19 CN CN202111216188.XA patent/CN114184827A/en active Pending
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|---|---|---|---|---|
| US6603221B1 (en) * | 1999-04-22 | 2003-08-05 | Zhongdu Liu | Solid state electrical switch |
| CN104519609A (en) * | 2013-09-26 | 2015-04-15 | 哈尔滨府明电器有限公司 | Light fixture with air quality monitoring function |
| CN212301806U (en) * | 2020-05-15 | 2021-01-05 | 北京小米移动软件有限公司 | Power on-off detection circuit |
| CN213423404U (en) * | 2020-06-01 | 2021-06-11 | 深圳和而泰智能控制股份有限公司 | Switch state detection circuit |
| CN113014082A (en) * | 2021-04-12 | 2021-06-22 | 青岛易来智能科技股份有限公司 | Low-power-consumption standby power supply, circuit, control method and intelligent product |
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