CN103983830A - Automatic-monitoring switch type surge protective device afterflow device - Google Patents
Automatic-monitoring switch type surge protective device afterflow device Download PDFInfo
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Abstract
The invention discloses an automatic-monitoring switch type surge protective device afterflow device. The device comprises an afterflow sampling and amplitude limiting module, a polarity conversion and isolation amplifying module, an active filtering module and a signal processing and display module. The device can be used for monitoring the work state of a switch type surge protective device in real time, and time and frequency of motions and the size of afterflow are automatically recorded. Meanwhile, the overvoltage situation in a line can be judged through the recorded data, whether overvoltage is switching overvoltage or lightning overvoltage is judged according to meteorological conditions, and power supply faults are analyzed according to the recorded data.
Description
Technical field
The device that the present invention relates to the afterflow of a kind of automatic monitoring slowdown monitoring switch type surge protector, belongs to thunder and lightning science and technology field.
Background technology
In GB5007-2010 Code for design of lightning protection of buildings, specify, the consumer unit place introducing at lightning current should install
the surge protector of level test.The voltage protection level value of surge protector should be less than or equal to 2.5kV.The dash current value of each protected mode, in the time cannot determining, dash current should be got and be equal to or greater than 12.5kA.
the structure of level test surge protector, adopts interstitial structure, and interstitial structure surge protector exists afterflow problem, after afterflow refers to impulsive discharge electric current, is flowed into the electric current of surge protector by power-supply system.Surge protector is arranged in electrical network circuit, and in fact afterflow is exactly power frequency short-circuit current, and this just requires switch-type surge protector will have the ability of automatic disconnection afterflow.If there is time of afterflow is long or electric current is excessive, may cause the automatic trip circut breaking of transmission line of electricity, even cause the accident such as fire, blast.
Therefore, in the time that switch-type surge protector is arranged in transmission line of electricity, carry out the monitoring of afterflow, can understand accurately judgement to its duty.The work of switch-type surge protector will have under higher superpotential effect, once after work, the voltage at two ends is very low, in the time that line voltage distribution exceedes the forward voltage at two ends, just there will be afterflow phenomenon.Automatically the monitoring switch type surge protector working condition that detector switch type surge protector current following device can be real-time; can judge superpotential working condition in this circuit according to the data of record; to the accident occurring in supply line; can be according to the data analysis of record, and this device can automatically record the time, number of times of the work of surge protector and produce the size of afterflow.If there is lightning strike accident in circuit, can carry out analysis and evaluation to lightning strike accident according to the data of record.At present, the size of switch-type surge protector afterflow is just under lab carried out simulation test, and the actual afterflow size producing in the line does not also have reality to test.Therefore, invent this device for the circuit Real-Time Monitoring to switch-type surge protector.
Summary of the invention
Technical matters to be solved by this invention is to provide the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow, is used for the duty of Real-Time Monitoring switch-type surge protector, the automatically size of time, number of times and the afterflow of operation of recording; Can be judged in circuit and be occurred superpotential situation by the data of record simultaneously, according to meteorological condition, judgement is switching overvoltage or lightning surge, and by the data of record, power supply trouble is analyzed.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
The invention provides the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow, comprise afterflow sampling and amplitude limit module, polarity conversion and Isolation Amplifier Module, active power filtering module, signal processing and display module;
In the time there is superpotential in circuit, the afterflow that afterflow sampling and amplitude limit module produce surge protector samples, and the voltage signal of sampling is carried out to amplitude limit; Polarity conversion and the Isolation Amplifier Module voltage signal after to amplitude limit carries out polarity conversion, isolation is amplified; Higher hamonic wave target signal filter in voltage signal after active power filtering module is amplified isolation; Signal is processed with display module filtered voltage signal is processed, and the current value calculating is stored and shown;
Meanwhile, polarity conversion is also processed with display module trigger pip is provided to signal with Isolation Amplifier Module, and signal is processed with display module and carried out signals collecting receiving time delay after trigger pip, and records time and the number of times of trigger pip.
As further prioritization scheme of the present invention, described afterflow sampling and amplitude limit module comprise afterflow sample circuit, amplitude limiter circuit, wherein:
Described afterflow sample circuit is the first resistance, and described the first resistance is connected on the ground wire of surge protector, for carrying out afterflow sampling;
Described amplitude limiter circuit comprises the second resistance, the 3rd resistance, Transient Suppression Diode; Wherein, one end of the second resistance is connected with the earth terminal of the first resistance, and one end of the 3rd resistance is connected with the other end of the first resistance, and the other end of the second resistance, the other end of the 3rd resistance are connected with the two ends of Transient Suppression Diode respectively, forms loop.
As further prioritization scheme of the present invention, described polarity conversion comprises polarity switching, isolating amplifier circuit with Isolation Amplifier Module, and described isolating amplifier circuit is isolated amplifier, wherein:
Described polarity switching comprises the first diode to the four diodes, the first electric capacity; Wherein, one end of the first electric capacity respectively with the common port of the 3rd resistance and Transient Suppression Diode, the negative electrode of the first diode, the anodic bonding of the second diode, the other end of the first electric capacity respectively with the common port of the second resistance and Transient Suppression Diode, the negative electrode of the 3rd diode, the anodic bonding of the 4th diode, after the negative electrode of the second diode is connected with the negative electrode of the 4th diode, input an input end of isolated amplifier, after the anodic bonding of the anode of the first diode and the 3rd diode, input another input end of isolated amplifier.
As further prioritization scheme of the present invention, described active power filtering module is active filter circuit, comprise the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 4th resistance, the 5th resistance, the 6th resistance, active chip, wherein, one end of the second electric capacity is connected with the output terminal of isolating amplifier circuit, and the other end is connected with the output terminal of active chip; The 6th one end of resistance and the output terminal of isolating amplifier circuit are connected, and the other end is connected with one end of the 3rd electric capacity, the inverting input of active chip respectively, the other end ground connection of the 3rd electric capacity, the normal phase input end of active chip connect with the 5th resistance after ground connection; The 4th one end of resistance and the normal phase input end of active chip are connected, and the other end is connected with the output terminal of active chip; Active chip connects positive and negative 15 volts of power supplys, and the 5th electric capacity one end is connected with positive 15 volts, other end ground connection; One end of the 4th electric capacity is connected with negative 15 volts, other end ground connection.
As further prioritization scheme of the present invention, described signal is processed with display module and is comprised signal processing circuit, display, wherein:
Described signal processing circuit comprises the 7th resistance, the 8th resistance, the 9th resistance, the 5th diode, single-chip microcomputer, and wherein, one end of the 7th resistance is connected with the output terminal of active chip in active filter circuit, the other end connect with the 8th resistance after ground connection; One end of the 9th resistance is connected with the output terminal of active chip in active filter circuit, and the other end is connected with one end of the 5th diode, the input end of single-chip microcomputer respectively, the other end ground connection of the 5th diode.
As further prioritization scheme of the present invention, it is a civil power cycle 20ms at the acquisition time that receives time delay after trigger pip and carry out signals collecting that described signal is processed with display module.
As further prioritization scheme of the present invention, it is 50 μ s at the delay time that receives time delay after trigger pip and carry out signals collecting that described signal is processed with display module.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) in the present invention, adopt isolated amplifier circuit, the low-pressure section of the high-pressure section of sampling and signal processing is carried out to electrical isolation, security performance is good, and antijamming capability is strong;
(2) in the present invention, afterflow sample circuit adopts high-power precision resistance, has the sampled signal linearity good, the feature that sampling precision is high;
(3) in the present invention, in signal processing circuit, adopt single-chip microcomputer, convenient signal treatment, has the feature of signal storage and Real-Time Monitoring;
(4) circuit structure design of the present invention is simple, and cost is low, easy for installation, stable and reliable working performance; Can configure the switch-type surge protector of different through-flow sizes, independent installation separately, has wide range of applications; Device inside is provided with independently power circuit of two-way, when use, directly with utility grid power supply, has the high voltage bearing feature of insulation.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Describe embodiments of the present invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Those skilled in the art of the present technique are understandable that, unless specially statement, singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording using in instructions of the present invention " comprises " and refers to and have described feature, integer, step, operation, element and/or assembly, exists or adds one or more other features, integer, step, operation, element, assembly and/or their group but do not get rid of.Should be appreciated that, when we claim element to be " connected " or " coupling " when another element, it can be directly connected or coupled to other elements, or also can have intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises arbitrary unit of listing item and all combinations that one or more is associated.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have with the present invention under the identical meaning of the general understanding of those of ordinary skill in field.Should also be understood that such as those terms that define in general dictionary and should be understood to have the meaning consistent with meaning in the context of prior art, unless and definition as here, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
The present invention designs the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow, as shown in Figure 1, comprises afterflow sampling and amplitude limit module, polarity conversion and Isolation Amplifier Module, active power filtering module, signal processing and display module;
In the time there is superpotential in circuit, the afterflow that afterflow sampling and amplitude limit module produce surge protector samples, and the voltage signal of sampling is carried out to amplitude limit; Polarity conversion and the Isolation Amplifier Module voltage signal after to amplitude limit carries out polarity conversion, isolation is amplified; Higher hamonic wave target signal filter in voltage signal after active power filtering module is amplified isolation; Signal is processed with display module filtered voltage signal is processed, and the current value calculating is stored and shown;
Meanwhile, polarity conversion is also processed with display module trigger pip is provided to signal with Isolation Amplifier Module, and signal is processed with display module and carried out signals collecting receiving time delay after trigger pip, and records time and the number of times of trigger pip.
The device of a kind of automatic monitoring slowdown monitoring switch of the present invention type surge protector afterflow, its preferred embodiment as shown in Figure 2.
Described afterflow sampling and amplitude limit module comprise afterflow sample circuit, amplitude limiter circuit, wherein:
Described afterflow sample circuit is the first resistance R 1, and described the first resistance R 1 is connected on the ground wire of surge protector, for carrying out afterflow sampling;
Described amplitude limiter circuit comprises the second resistance R 2, the 3rd resistance R 3, Transient Suppression Diode TVS1; Wherein, one end of the second resistance R 2 is connected with the earth terminal of the first resistance R 1, one end of the 3rd resistance R 3 is connected with the other end of the first resistance R 1, and the other end of the second resistance R 2, the other end of the 3rd resistance R 3 are connected with the two ends of Transient Suppression Diode TVS1 respectively, forms loop; Transient Suppression Diode TVS1 is used for carrying out amplitude limit, and the electric potential difference that the second resistance R 2, the 3rd resistance R 3 form through the first resistance R 1 afterflow decays to prevent that electric current is excessive, improves Limiting effect.
Described polarity conversion comprises polarity switching, isolating amplifier circuit with Isolation Amplifier Module, and described isolating amplifier circuit is isolated amplifier, wherein:
Described polarity switching comprises the first diode D1 to the four diode D4, the first capacitor C 1, wherein, one end of the first capacitor C 1 respectively with the common port of the 3rd resistance R 3 with Transient Suppression Diode TVS1, the negative electrode of the first diode D1, the anodic bonding of the second diode D2, the other end of the first capacitor C 1 respectively with the common port of the second resistance R 2 with Transient Suppression Diode TVS1, the negative electrode of the 3rd diode D3, the anodic bonding of the 4th diode D4, an input end of input isolated amplifier after the negative electrode of the second diode D2 is connected with the negative electrode of the 4th diode D4, after the anodic bonding of the anode of the first diode D1 and the 3rd diode D3, input another input end of isolated amplifier,
The first capacitor C 1 is filter capacitor, carries out filtering for the signal to after amplitude limit; The first diode D1 to the four diode D4 form rectifier bridge, and for AC signal is converted to direct current signal, the port 2,4 of rectifier bridge is the isolated amplifier to rear class by DC signal output, completes polarity translation function; Isolated amplifier amplifies processing after isolating to the received signal.
Described active power filtering module is active filter circuit, comprise the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, active chip IC1, wherein, second one end of capacitor C 2 and the output terminal of isolating amplifier circuit are connected, and the other end is connected with the output terminal of active chip IC1; The 6th one end of resistance R 6 and the output terminal of isolating amplifier circuit are connected, the other end is connected with one end of the 3rd capacitor C 3, the inverting input of active chip IC1 respectively, the other end ground connection of the 3rd capacitor C 3, the normal phase input end of active chip IC1 connect with the 5th resistance R 5 after ground connection; One end of the 4th resistance R 4 is connected with the normal phase input end of active chip IC1, and the other end is connected with the output terminal of active chip IC1; Active chip IC1 connects positive and negative 15 volts of power supplys, and one end of the 5th capacitor C 5 is connected with positive 15 volts, other end ground connection; One end of the 4th capacitor C 4 is connected with negative 15 volts, other end ground connection.
Described signal is processed with display module and is comprised signal processing circuit, display, wherein:
Described signal processing circuit comprises the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the 5th diode D5, single-chip microcomputer, wherein, one end of the 7th resistance R 7 is connected with the output terminal of active chip IC1 in active filter circuit, the other end connect with the 8th resistance R 8 after ground connection; One end of the 9th resistance R 9 is connected with the output terminal of active chip IC1 in active filter circuit, and the other end is connected with one end of the 5th diode D5, the input end of single-chip microcomputer respectively, the other end ground connection of the 5th diode D5;
, after single-chip microcomputer is processed, transfer to display and show, the collection of settling signal, processing, demonstration through the signal of active filter circuit.
The principle of work of a kind of automatic monitoring slowdown monitoring switch of the present invention type surge protector current following device is as follows:
While having Lightning Over-voltage or switching overvoltage in circuit, cause switch-type surge protector action.In afterflow sample resistance, in the time having electric current to flow through, form voltage signal at its two ends.Due to when switch-type surge protector under superpotential effect conducting in a flash, the through-flow electric current that can reach more greatly tens kilo-amperes, but the duration is very short, tens to hundreds of microsecond.If there is afterflow, afterflow meeting exists, and the duration is the ms order of magnitude, so voltage signal need to carry out amplitude limit through amplitude limiter circuit.
Voltage signal after amplitude limit is through polarity switching, by the voltage signal of sampling no matter be positive polarity or negative polarity all will be converted to positive polarity, object is to guarantee to deliver to the voltage signal that the voltage signal of signal processing unit is positive polarity.Positive polarity sampling voltage signal is delivered to and in isolated amplifier, is carried out signal amplification; while action due to switch-type surge protector, immediate current is larger, forms very high superpotential; adopt the larger isolated amplifier of insulation resistance, ensure the trouble free service of signal processing circuit.
Be divided into two-way through isolated amplifier amplifying signal, a road is as the trigger pip of single-chip microcomputer treatment circuit, in the program of single-chip microcomputer treatment circuit, while only having trigger pip, time when single-chip microcomputer record triggers, then carry out signals collecting, the time of collection is about 20ms, the time in a civil power cycle, and when trigger pip control gathers voltage, there is the time delay of a time to be about 50 μ s, when after superpotential effect, gather, at this moment current value is afterflow value again; Another road signal is afterflow sampled signal, after the higher hamonic wave signal in active filter circuit filtered signal, deliver to signal processing circuit and carry out signal processing, single-chip microcomputer, time and number of times while recording trigger pip, sampled signal is processed and calculated current value, store and be presented on display.The data of these records can be called, for scientific research or other purposes.
The above; it is only the embodiment in the present invention; but protection scope of the present invention is not limited to this; any people who is familiar with this technology is in the disclosed technical scope of the present invention; can understand conversion or the replacement expected; all should be encompassed in of the present invention comprise scope within, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (7)
1. a device for automatic monitoring slowdown monitoring switch type surge protector afterflow, is characterized in that, this device comprises afterflow sampling and amplitude limit module, polarity conversion and Isolation Amplifier Module, active power filtering module, signal processing and display module;
In the time there is superpotential in circuit, the afterflow that afterflow sampling and amplitude limit module produce surge protector samples, and the voltage signal of sampling is carried out to amplitude limit; Polarity conversion and the Isolation Amplifier Module voltage signal after to amplitude limit carries out polarity conversion, isolation is amplified; Higher hamonic wave target signal filter in voltage signal after active power filtering module is amplified isolation; Signal is processed with display module filtered voltage signal is processed, and the current value calculating is stored and shown;
Meanwhile, polarity conversion is also processed with display module trigger pip is provided to signal with Isolation Amplifier Module, and signal is processed with display module and carried out signals collecting receiving time delay after trigger pip, and records time and the number of times of trigger pip.
2. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 1 afterflow, is characterized in that, described afterflow sampling and amplitude limit module comprise afterflow sample circuit, amplitude limiter circuit, wherein:
Described afterflow sample circuit is the first resistance (R1), and described the first resistance (R1) is connected on the ground wire of surge protector, for carrying out afterflow sampling;
Described amplitude limiter circuit comprises the second resistance (R2), the 3rd resistance (R3), Transient Suppression Diode (TVS1); Wherein, one end of the second resistance (R2) is connected with the earth terminal of the first resistance (R1), one end of the 3rd resistance (R3) is connected with the other end of the first resistance (R1), the other end of the second resistance (R2), the other end of the 3rd resistance (R3) are connected with the two ends of Transient Suppression Diode (TVS1) respectively, form loop.
3. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 2 afterflow; it is characterized in that; described polarity conversion comprises polarity switching, isolating amplifier circuit with Isolation Amplifier Module, and described isolating amplifier circuit is isolated amplifier, wherein:
Described polarity switching comprises that the first diode (D1) is to the 4th diode (D4), the first electric capacity (C1), wherein, one end of the first electric capacity (C1) respectively with the common port of the 3rd resistance (R3) and Transient Suppression Diode (TVS1), the negative electrode of the first diode (D1), the anodic bonding of the second diode (D2), the other end of the first electric capacity (C1) respectively with the common port of the second resistance (R2) and Transient Suppression Diode (TVS1), the negative electrode of the 3rd diode (D3), the anodic bonding of the 4th diode (D4), an input end of input isolated amplifier after the negative electrode of the second diode (D2) is connected with the negative electrode of the 4th diode (D4), after the anodic bonding of the anode of the first diode (D1) and the 3rd diode (D3), input another input end of isolated amplifier.
4. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 3 afterflow, it is characterized in that, described active power filtering module is active filter circuit, comprise the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), active chip (IC1), wherein, one end of the second electric capacity (C2) is connected with the output terminal of isolating amplifier circuit, and the other end is connected with the output terminal of active chip (IC1); One end of the 6th resistance (R6) is connected with the output terminal of isolating amplifier circuit, the other end is connected with one end of the 3rd electric capacity (C3), the inverting input of active chip (IC1) respectively, the other end ground connection of the 3rd electric capacity (C3), the normal phase input end of active chip (IC1) connect with the 5th resistance (R5) after ground connection; One end of the 4th resistance (R4) is connected with the normal phase input end of active chip (IC1), and the other end is connected with the output terminal of active chip (IC1); Active chip (IC1) connects positive and negative 15 volts of power supplys, and one end of the 5th electric capacity (C5) is connected with positive 15 volts, other end ground connection; One end of the 4th electric capacity (C4) is connected with negative 15 volts, other end ground connection.
5. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 4 afterflow, is characterized in that, described signal is processed with display module and comprised signal processing circuit, display, wherein:
Described signal processing circuit comprises the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9), the 5th diode (D5), single-chip microcomputer, wherein, one end of the 7th resistance (R7) is connected with the output terminal of active chip in active filter circuit (IC1), the other end connect with the 8th resistance (R8) after ground connection; One end of the 9th resistance (R9) is connected with the output terminal of active chip in active filter circuit (IC1), and the other end is connected with one end of the 5th diode (D5), the input end of single-chip microcomputer respectively, the other end ground connection of the 5th diode (D5).
6. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 1 afterflow, is characterized in that, it is a civil power cycle 20ms at the acquisition time that receives time delay after trigger pip and carry out signals collecting that described signal is processed with display module.
7. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 1 afterflow, is characterized in that, it is 50 μ s at the delay time that receives time delay after trigger pip and carry out signals collecting that described signal is processed with display module.
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| CN110906810A (en) * | 2019-11-28 | 2020-03-24 | 湖北三江航天红林探控有限公司 | ARM-based triaxial high-G-value sensor testing device and testing method |
| CN110906810B (en) * | 2019-11-28 | 2021-11-05 | 湖北三江航天红林探控有限公司 | ARM-based triaxial high-G-value sensor testing device and testing method |
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| CN103983830B (en) | 2016-06-08 |
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