CN104122501A - Method, device and equipment for detecting AFCI - Google Patents
Method, device and equipment for detecting AFCI Download PDFInfo
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- CN104122501A CN104122501A CN201410353925.4A CN201410353925A CN104122501A CN 104122501 A CN104122501 A CN 104122501A CN 201410353925 A CN201410353925 A CN 201410353925A CN 104122501 A CN104122501 A CN 104122501A
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Abstract
The invention discloses a method, a device and equipment for detecting AFCI. Wherein, this equipment includes: the AFCI is connected between the arc generating device and the power supply; the signal collector is connected with the electric arc generating device and is used for collecting electric arc signals generated by the electric arc generating device; the fault signal detection device is connected with the signal collector and used for detecting whether the arc signal meets a preset fault condition; the voltage collector is connected between the arc generating device and the fault signal detection device and is used for detecting the voltages at two ends of the arc generating device under the condition that the arc signal meets the preset fault condition; the fault signal detection device is also used for judging whether the AFCI is in a normal working state or not according to the voltage. By adopting the embodiment of the invention, the detection of the AFCI performance is realized, and the problem that whether the AFCI performance is qualified cannot be detected in the prior art is solved.
Description
Technical field
The present invention relates to circuit protection device field, in particular to a kind of method for detection of AFCI, device and equipment.
Background technology
AFCI is arc fault breaker.It is by the arc fault characteristic information in identification circuit, arc fault develop into fire or circuit there is short circuit before a kind of protective device of interrupting power circuit.Particularly, it can detect in fault electric arc and cause the abnormal occurrence in electric current, and when household electrical appliance in use produce fault electric arc, AFCI in time deenergization prevents that fire from occurring.
In prior art by AFCI as circuit protection device, once AFCI breaks down (if do not worked or delaying work), making does not have protective device in circuit, and may bring potential safety hazard.Yet in prior art, there is no to detect the whether qualified scheme of performance of AFCI.
The whether qualified problem of performance for detecting AFCI in prior art, not yet proposes effective solution at present.
Summary of the invention
The whether qualified problem of performance for detecting AFCI in correlation technique, not yet proposes effective solution at present, and for this reason, fundamental purpose of the present invention is to provide a kind of method for detection of AFCI, device and equipment, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of equipment for detection of AFCI, this equipment comprises: AFCI, is connected between arc generating device and power supply; Signal picker, is connected with arc generating device, the arc signal occurring for gathering arc generating device; Fault-signal pick-up unit, is connected with signal picker, for detection of arc signal, whether meets default fault condition; Voltage collector, is connected between arc generating device and fault-signal pick-up unit, the in the situation that of presetting fault condition, detects the voltage at arc generating device two ends for meeting at arc signal; Fault-signal pick-up unit is also for judging that according to voltage whether AFCI is in normal duty.
Further, equipment also comprises: arc generating device comprises: the first cutting member and the second cutting member, be provided with blade on the second cutting member; Blade and the first cutting member are used in conjunction with, and to cut cable, produce arc signal.
Further, signal picker comprises: current transformer, is connected with arc generating device, for gathering the current signal of arc signal; Device also comprises: DA converter, is connected between current transformer and fault-signal pick-up unit, for current signal is converted to digital signal.
Further, fault-signal pick-up unit comprises: counter, is connected with signal picker, for counting when receiving first fault-signal of arc signal, in the situation that the quantity of fault-signal reaches predetermined threshold value, confirm that arc signal meets default fault condition.
Further, equipment also comprises: display screen, is connected with counter, for showing the quantity of fault-signal.
Further, equipment also comprises: alarm, is connected with fault-signal pick-up unit, at the non-vanishing alarm of voltage.
To achieve these goals, according to a further aspect in the invention, provide a kind of method for detection of AFCI, the method comprises: gather the arc signal that arc generating device occurs; Detect arc signal and whether meet default fault condition; In the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends; According to voltage, judge that whether AFCI is in normal duty.
Further, according to voltage, judge whether AFCI comprises in normal duty: in the situation that the voltage at arc generating device two ends is zero, determine that AFCI is in normal duty; In the situation that the voltage at arc generating device two ends is non-vanishing, determine that AFCI is not in normal duty.
Whether meet default fault condition comprise: during first fault-signal in receiving arc signal, count if further, detecting arc signal; In the situation that the quantity of fault-signal reaches predetermined threshold value, confirm that arc signal meets default fault condition.
Further, during first fault-signal in receiving arc signal, counting comprises: receiving that arc signal electric current is asymmetric, arc signal is zero at zero crossing electric current, occur the high-frequency harmonic of predetermined number in arc signal, the current amplitude of arc signal reduces, the electric current of arc signal in zero crossing current break one of at least, determine the signal that breaks down in arc signal.
To achieve these goals, according to a further aspect in the invention, provide a kind of device for detection of AFCI, this device comprises: acquisition module, the arc signal occurring for gathering arc generating device; Whether first detection module, meet default fault condition for detection of arc signal; The second detection module, the in the situation that of presetting fault condition, detects the voltage at arc generating device two ends for meeting at arc signal; Judge module, for judging that according to voltage whether AFCI is in normal duty.
Further, judge module comprises: the first judgement submodule, in the situation that the voltage at arc generating device two ends is zero, judge AFCI in normal duty; The second judgement submodule, in the situation that the voltage at arc generating device two ends is non-vanishing, judges AFCI not in normal duty.
Adopt the embodiment of the present invention, can gather arc signal by signal picker, whether the fault-signal that then fault-signal pick-up unit detects in arc signal meets default fault condition, in the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends, and judge that according to this voltage whether AFCI is in normal duty, thus realized the detection to AFCI performance, solved the whether qualified problem of performance that cannot detect AFCI in prior art.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the structural representation of the equipment for detection of AFCI of the embodiment of the present invention;
Fig. 2 is according to the structural representation of a kind of optional arc generating device of the embodiment of the present invention;
Fig. 3 is according to the structural representation of a kind of optional fault-signal pick-up unit of the embodiment of the present invention;
Fig. 4 is according to the structural representation of a kind of optional equipment for detection of AFCI of the embodiment of the present invention; And
Fig. 5 is according to the process flow diagram of a kind of optional method for detection of AFCI of the embodiment of the present invention.
Embodiment
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, the term " first " in instructions of the present invention and claims and above-mentioned accompanying drawing, " second " etc. are for distinguishing similar object, and needn't be for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so as embodiments of the invention described herein can with except diagram here or describe those order enforcement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, for example, those steps or unit that the process that has comprised series of steps or unit, method, system, product or equipment are not necessarily limited to clearly list, but can comprise clearly do not list or for these processes, method, product or equipment intrinsic other step or unit.
Fig. 1 is according to the structural representation of the equipment for detection of AFCI of the embodiment of the present invention.As shown in Figure 1, this device can comprise: AFCI10, is connected between arc generating device and power supply 60; Signal picker 20, is connected with arc generating device 50, the arc signal occurring for gathering arc generating device; Fault-signal pick-up unit 30, is connected with signal picker, for detection of arc signal, whether meets default fault condition; Voltage collector 40, is connected between arc generating device and fault-signal pick-up unit, the in the situation that of presetting fault condition, detects the voltage at arc generating device two ends for meeting at arc signal; Fault-signal pick-up unit is also for judging that according to voltage whether AFCI is in normal duty.
Adopt the embodiment of the present invention, can gather arc signal by signal picker, whether the fault-signal that then fault-signal pick-up unit detects in arc signal meets default fault condition, in the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends, and judge that according to this voltage whether AFCI is in normal duty, thus realized the detection to AFCI performance, solved the whether qualified problem of performance that cannot detect AFCI in prior art.
Particularly, in the situation that the voltage detecting is zero, confirm that AFCI can normally disconnect, AFCI is in normal duty; In the situation that the voltage detecting is non-vanishing, confirm that AFCI cannot normally disconnect, AFCI is in abnormal duty.
In the above embodiment of the present invention, arc generating device can comprise: the first cutting member and the second cutting member, be provided with blade on the second cutting member; Blade and the first cutting member are used in conjunction with, and to cut cable, produce arc signal.
As shown in Figure 2, the first end of the first cutting member 51 can be connected with the first end of the second cutting member 52, the first cutting member and the second cutting member all can for insulation, blade 53 can be fixed on the second cutting member, and can keep certain cutting angle, make it to produce actual contact with first wire in cable, and contact with second wire generation electric arc in cable.According to the device shown in Fig. 2, can be in cut place 55 produce arc signals.
Particularly, tested wire samples 54 (being cable) is by being placed in below blade 53 shown in Fig. 2, what steel blade can be for steel, alternatively, the thickness of blade is 1.27mm, physical dimension is about 32mm * 140mm.
According to the abovementioned embodiments of the present invention, signal picker can comprise: current transformer, is connected with arc generating device, for gathering the current signal of arc signal; Device also comprises: DA converter, is connected between current transformer and fault-signal pick-up unit, for current signal is converted to digital signal.
Particularly, as shown in Figure 3, current transformer 21 is connected with arc generating device 50, and current transformer is converted to digital signal by the current signal of the arc signal collecting by DA converter, by microcontroller, digital signal is analyzed.
In the above embodiment of the present invention, signal picker and voltage collector all can be independent of or be built in fault-signal pick-up unit.Equipment as shown in Figure 4, AFCI10 is connected between power supply 60 and fault-signal pick-up unit 30, and in this embodiment, signal picker and voltage collector 40 are all built in fault-signal pick-up unit.
What need to further illustrate is, fault-signal pick-up unit can comprise: counter, be connected with signal picker, for counting when receiving first fault-signal of arc signal, in the situation that the quantity of fault-signal reaches predetermined threshold value, confirm that arc signal meets default fault condition.
Further, equipment also comprises as shown in Figure 3: display screen 70, is connected with counter, for showing the quantity of fault-signal.
Further, equipment also comprises: alarm (hummer 80 as shown in Figure 3), is connected with fault-signal pick-up unit, at the non-vanishing alarm of voltage.
As shown in Figure 3, by line current mutual inductor, catch fault electric arc current signal, by DA converter, convert simulating signal to digital signal, MCU microcontroller 31 is analyzed digital signal.Particularly, first fault-signal detecting digital signal from microcontroller starts counting, the numerical value of counting can read from display screen, when the quantity of fault-signal reaches 8 (), determine that arc signal meets default fault condition, MCU sends control instruction counter and stops counting, and AFCI should carry out the action being connected of deenergization and arc generating device.By voltage collector, gather the supply voltage (being the voltage in above-described embodiment) of arc generating device, and by DA converter, convert simulating signal to digital signal and be input to MCU31, when the voltage detecting is 0, judging AFCI normally disconnects, AFCI is in normal duty, MCU sends control signal control hummer and intermittently rings, and represents test passes; If the voltage detecting is not 0, judge AFCI and normally do not disconnect, AFCI is in abnormal duty, and MCU sends control signal and controls hummer yowl, represents test failure.
More specifically, when AFCI is tested, if (as 0.5S) do not reach 8 fault-signals within the count cycle, counter resets, and restarts counting.If cannot reach above-mentioned default fault condition in 10 count cycles, MCU opertaing device break-off, controls hummer and rings continuously 3s, and prompting need to be changed cable sample and re-start detection.
In the above embodiment of the present invention, can pass through following conditioned discrimination fault-signal, particularly, arc signal meets any one in following condition can judge the signal that breaks down in arc signal.Condition is: the electric current of arc signal is asymmetric; Arc signal occurs that at zero crossing electric current is 0 phenomenon; There are a large amount of high-frequency harmonics in arc signal; The current amplitude of arc signal reduces; At near zero-crossing point, there is current break in electric current.
To achieve these goals, according to a further aspect in the invention, provide a kind of method for detection of AFCI, as shown in Figure 5, the method can realize as follows:
Step S502: gather the arc signal that arc generating device occurs.
Step S504: detect arc signal and whether meet default fault condition.
Step S506: in the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends.
Step S508: judge that according to voltage whether AFCI is in normal duty.
Adopt the embodiment of the present invention, can gather arc signal by signal picker, whether the fault-signal that then fault-signal pick-up unit detects in arc signal meets default fault condition, in the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends, and judge that according to this voltage whether AFCI is in normal duty, thus realized the detection to AFCI performance, solved the whether qualified problem of performance that cannot detect AFCI in prior art.
Particularly, according to voltage, judge whether AFCI can comprise in normal duty: in the situation that the voltage at arc generating device two ends is zero, determine that AFCI is in normal duty; In the situation that the voltage at arc generating device two ends is non-vanishing, determine that AFCI is not in normal duty.
In the above embodiment of the present invention, detect arc signal and whether meet default fault condition and can comprise: during first fault-signal in receiving arc signal, count; In the situation that the quantity of fault-signal reaches predetermined threshold value, confirm that arc signal meets default fault condition.
According to the abovementioned embodiments of the present invention, during first fault-signal in receiving arc signal, counting can comprise: receiving that arc signal electric current is asymmetric, arc signal is zero at zero crossing electric current, occur the high-frequency harmonic of predetermined number in arc signal, the current amplitude of arc signal reduces, the electric current of arc signal in zero crossing current break one of at least, determine the signal that breaks down in arc signal.
In the above embodiment of the present invention, a kind of voltaic arc generating device is provided, and fault arc detection device is provided, can analyze the requirement (default fault condition) whether electric arc reaches experimental standard, and when arc signal reaches default fault condition, detect AFCI and whether correctly disconnect.
Arc generating device is wherein the device of similar plug-in strip shape, and part is cut cable and produced some contact arc signal, and passes through fault arc detection device, analyze arc signal, when automatic identification fault electric arc reaches requirement, meet the requirements, AFCI tests, and shows test results; Undesirable, cable sample is changed in prompting.
It should be noted that, in the step shown in the process flow diagram of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
To achieve these goals, according to a further aspect in the invention, provide a kind of device for detection of AFCI, this device comprises: acquisition module, the arc signal occurring for gathering arc generating device; Whether first detection module, meet default fault condition for detection of arc signal; The second detection module, the in the situation that of presetting fault condition, detects the voltage at arc generating device two ends for meeting at arc signal; Judge module, for judging that according to voltage whether AFCI is in normal duty.
Adopt the embodiment of the present invention, can gather arc signal by signal picker, whether the fault-signal that then fault-signal pick-up unit detects in arc signal meets default fault condition, in the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends, and judge that according to this voltage whether AFCI is in normal duty, thus realized the detection to AFCI performance, solved the whether qualified problem of performance that cannot detect AFCI in prior art.
Further, judge module can comprise: the first judgement submodule, in the situation that the voltage at arc generating device two ends is zero, judge AFCI in normal duty; The second judgement submodule, in the situation that the voltage at arc generating device two ends is non-vanishing, judges AFCI not in normal duty.
As can be seen from the above description, the present invention has realized following technique effect:
Adopt the embodiment of the present invention, can gather arc signal by signal picker, whether the fault-signal that then fault-signal pick-up unit detects in arc signal meets default fault condition, in the situation that arc signal meets default fault condition, detect the voltage at arc generating device two ends, and judge that according to this voltage whether AFCI is in normal duty, thus realized the detection to AFCI performance, solved the whether qualified problem of performance that cannot detect AFCI in prior art.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. for detection of an equipment of AFCI, it is characterized in that, comprising:
AFCI, is connected between arc generating device and power supply;
Signal picker, is connected with described arc generating device, the arc signal occurring for gathering described arc generating device;
Fault-signal pick-up unit, is connected with described signal picker, for detection of described arc signal, whether meets default fault condition;
Voltage collector, is connected between described arc generating device and described fault-signal pick-up unit, in the situation that described arc signal meets described default fault condition, detects the voltage at described arc generating device two ends;
Described fault-signal pick-up unit is also for judging that according to described voltage whether described AFCI is in normal duty.
2. equipment according to claim 1, is characterized in that, described equipment also comprises:
Described arc generating device comprises: the first cutting member and the second cutting member, be provided with blade on described the second cutting member; Described blade and described the first cutting member are used in conjunction with, and to cut cable, produce described arc signal.
3. equipment according to claim 1, is characterized in that, described signal picker comprises:
Current transformer, is connected with described arc generating device, for gathering the current signal of described arc signal;
Described device also comprises: DA converter, is connected between described current transformer and described fault-signal pick-up unit, for described current signal is converted to digital signal.
4. equipment according to claim 1, is characterized in that, described fault-signal pick-up unit comprises:
Counter, is connected with described signal picker, for counting when receiving first fault-signal of described arc signal, in the situation that the quantity of described fault-signal reaches predetermined threshold value, confirms that described arc signal meets default fault condition.
5. equipment according to claim 4, is characterized in that, described equipment also comprises:
Display screen, is connected with described counter, for showing the quantity of described fault-signal.
6. equipment according to claim 1, is characterized in that, described equipment also comprises:
Alarm, is connected with described fault-signal pick-up unit, at the non-vanishing alarm of described voltage.
7. for detection of a method of AFCI, it is characterized in that, comprising:
Gather the arc signal that arc generating device occurs;
Detect described arc signal and whether meet default fault condition;
In the situation that described arc signal meets described default fault condition, detect the voltage at described arc generating device two ends;
According to described voltage, judge that whether described AFCI is in normal duty.
8. method according to claim 7, is characterized in that, according to described voltage, judges whether described AFCI comprises in normal duty:
In the situation that the voltage at described arc generating device two ends is zero, determine that described AFCI is in normal duty;
In the situation that the voltage at described arc generating device two ends is non-vanishing, determine that described AFCI is not in normal duty.
9. method according to claim 7, is characterized in that, detects described arc signal and whether meets default fault condition and comprise:
During first fault-signal in receiving described arc signal, count;
In the situation that the quantity of described fault-signal reaches predetermined threshold value, confirm that described arc signal meets default fault condition.
10. method according to claim 9, is characterized in that, during first fault-signal in receiving described arc signal, counting comprises:
Receiving that asymmetric, the described arc signal of described arc signal electric current is zero at zero crossing electric current, in described arc signal, there is the high-frequency harmonic of predetermined number, the current amplitude of described arc signal reduces, the electric current of described arc signal in zero crossing current break one of at least, determine and in described arc signal, occur described fault-signal.
11. 1 kinds of devices for detection of AFCI, is characterized in that, comprising:
Acquisition module, the arc signal occurring for gathering arc generating device;
Whether first detection module, meet default fault condition for detection of described arc signal;
The second detection module, in the situation that described arc signal meets described default fault condition, detects the voltage at described arc generating device two ends;
Judge module, for judging that according to described voltage whether described AFCI is in normal duty.
12. devices according to claim 11, is characterized in that, described judge module comprises:
The first judgement submodule, in the situation that the voltage at described arc generating device two ends is zero, judges described AFCI in normal duty;
The second judgement submodule, in the situation that the voltage at described arc generating device two ends is non-vanishing, judges described AFCI not in normal duty.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410353925.4A CN104122501B (en) | 2014-07-23 | 2014-07-23 | method, device and equipment for detecting AFCI |
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| CN201410353925.4A CN104122501B (en) | 2014-07-23 | 2014-07-23 | method, device and equipment for detecting AFCI |
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| CN104122501A true CN104122501A (en) | 2014-10-29 |
| CN104122501B CN104122501B (en) | 2017-10-27 |
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| CN201410353925.4A Expired - Fee Related CN104122501B (en) | 2014-07-23 | 2014-07-23 | method, device and equipment for detecting AFCI |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880664A (en) * | 2015-04-23 | 2015-09-02 | 句容华源电器设备有限公司 | Three-phase non-synchronous fault detection method at closing and opening of disconnecting switch |
| CN106707145A (en) * | 2015-11-12 | 2017-05-24 | 上海电科电器科技有限公司 | Arc fault detection device test device and test method |
| CN107765150A (en) * | 2017-10-18 | 2018-03-06 | 福州大学 | Intelligent electric arc fault simulation system and operating method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376372A (en) * | 2012-04-23 | 2013-10-30 | 福建俊豪电子有限公司 | Three-phase AFCI detecting device |
| CN204009002U (en) * | 2014-07-23 | 2014-12-10 | 珠海格力电器股份有限公司 | Apparatus for detecting AFCI |
-
2014
- 2014-07-23 CN CN201410353925.4A patent/CN104122501B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880664A (en) * | 2015-04-23 | 2015-09-02 | 句容华源电器设备有限公司 | Three-phase non-synchronous fault detection method at closing and opening of disconnecting switch |
| CN106707145A (en) * | 2015-11-12 | 2017-05-24 | 上海电科电器科技有限公司 | Arc fault detection device test device and test method |
| CN106707145B (en) * | 2015-11-12 | 2019-12-27 | 上海电科电器科技有限公司 | Testing device and testing method of arc fault detection device |
| CN107765150A (en) * | 2017-10-18 | 2018-03-06 | 福州大学 | Intelligent electric arc fault simulation system and operating method |
| CN107765150B (en) * | 2017-10-18 | 2020-03-10 | 福州大学 | Intelligent arc fault simulation system and operation method |
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