CN107300662A - Electric arc alarm without externally fed - Google Patents
Electric arc alarm without externally fed Download PDFInfo
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- CN107300662A CN107300662A CN201710693775.5A CN201710693775A CN107300662A CN 107300662 A CN107300662 A CN 107300662A CN 201710693775 A CN201710693775 A CN 201710693775A CN 107300662 A CN107300662 A CN 107300662A
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- alarm
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
-
- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention proposes a kind of electric arc alarm without externally fed, including：Idle arc detection unit, waveform processing circuit, pulse processing circuit, alarm, power supply unit, wherein, idle arc detection unit includes at least one set of measure loop and at least one switch element, when occurring arc fault, because the electric current under arc fault has larger high fdrequency component, the voltage of every group of measure loop sensing can drive corresponding switching means conductive, then judge to detect arc signal during output pulse signal；Waveform processing circuit return pulse signal, the amplitude of pulse signals, waveform and cycle and pulse width are handled；Pulse processing circuit carries out counting processing according to pulse signal to pulse number, to judge whether to detect arc fault；Alarm sends electric arc alarm signal according to alarm command, to point out user.The present invention just can monitor the arc fault of ac power supply circuit, and send alarm signal without externally fed and wiring.
Description
Technical field
The present invention relates to Electric arc monitoring technical field, more particularly to a kind of electric arc alarm without externally fed.
Background technology
In the Fire in China analysis of causes, because fire accounting caused by electric reason is more than 30%.
The reason for electrical fire occurs is a lot, short circuit, insulation ag(e)ing, excessively stream, earth fault, loose contact, household electrical appliances or electricity
Hot equipment igniting flammable items etc..In essence, in all electrical fire generating processes, can all there is electric arc.
In the U.S., according to CPSC (US Consumer Product Safety Commission) statistics of 1998, every year because distribution line is old
Change the fire for causing electric arc to cause and have more than 40000, cause 16.8 hundred million dollars of direct economic loss.
Arc-fault circuit interrupter is currently existed, with the addition of to play fault electric arc on the basis of traditional breaker and protect
The function of shield effect, to take precautions against the fire triggered due to fault electric arc.But, existing arc-fault circuit interrupter should at some
With easy malfunction under scene, and directly trip, normal production may be influenceed and lived, current electric arc fault protection one
As be all mounted in local single load, such as air-conditioning.
In addition, the installation of existing arc-fault circuit interrupter needs to have a power failure, belong to the facility installed in advance, substantial amounts of occasion
There is presently no such facility.The generation of electric arc causes fire not always necessarily, if because socket
Loosen just by the power supply tripping in whole family or room, expand the scope of power failure, have a strong impact on production and live.It is actual big
In majority application, it is thus only necessary to alert, user can be reminded.
Arc-fault circuit interrupter or alarm device present on current market, are all to need wiring, it is necessary to the installation that has a power failure,
It is conditional to installation personnel.Also, the arc-fault circuit interrupter or alarm device existed is required for power supply.
The content of the invention
The purpose of the present invention is intended at least solve one of described technological deficiency.
Therefore, it is an object of the invention to provide a kind of electric arc alarm without externally fed.
To achieve these goals, embodiments of the invention provide a kind of electric arc alarm without externally fed, including：Nothing
Power consumption arc detection unit, waveform processing circuit, pulse processing circuit, alarm, power supply unit, wherein, the waveform processing
Circuit is connected with the idle arc detection unit and pulse processing circuit, and the pulse processing circuit connects with the alarm
Connect, said supply unit is connected with the idle arc detection unit, alarm；
The idle arc detection unit includes at least one set of measure loop and at least one switch element, electric when occurring
During arc failure, because the electric current under arc fault has larger high fdrequency component, the voltage of every group of measure loop sensing can drive
Corresponding switching means conductive is moved, during output pulse signal, then judges to detect arc signal, the pulse signal of output is sent
To the waveform processing circuit；
The waveform processing circuit is used to receive the pulse signal, the amplitude of pulse signals, waveform and cycle and arteries and veins
Rush width to be handled, export to pulse processing circuit, if pulse processing circuit is digital, produce a given pulsewidth
Signal and a pulse signal；If pulse processing circuit is simulation, a signal for determining pulsewidth is produced.
The pulse processing circuit is then logically realized and entered within the time of given pulse width if numeral
Horizontal pulse count, count value exceed setting value, such as 16, then export an alarm signal, it is believed that have arc fault.The arteries and veins
Rush process circuit if simulation, then waveform processing circuit output signal, by a RC integrating circuit, if integrating circuit
Output more than output comparator threshold value, then export an alarm signal, it is believed that have arc fault.
The alarm receives the alarm command for carrying out the pulse processing circuit, and sends electric arc according to the alarm command
Alarm signal, to point out user.
Further, the alarm includes alarm unit and wireless signal transmission unit,
The wireless signal transmission unit receives the alarm command from the pulse processing circuit, and carries out at alarm
Reason；
The alarm unit sends electric arc alarm signal, the electric arc alarm signal is using extremely according to the alarm command
A kind of few following form：Sound, light, vibration, non-modulation radio signal, the radio signal of modulation.
Further, the wireless signal transmitter uses the wireless communication mode of one of following form：Zigbee、LoRa、
LoRaWAN、NBIOT。
Further, at least one set of measure loop includes at least one detection coil, and each detection coil is used
There is no the air core coil of magnetic core or have the coil of magnetic core.
Further, the switch element uses the metal-oxide-semiconductor or triode or ultra-low power consumption integrated circuit of Low threshold.
Further, temperature sensor uses NTC resistance, and a bridge circuit is constituted with 3 resistance, accesses a comparator,
When temperature is higher than design temperature then output temperature alarm signal.Current sensor circuit is also by a comparator circuit and setting
Current value ratio is compared with when loop current value exceedes setting electric current value then output current alarm signal.The two alarm signals pass through RC
After low pass filter, hysteresis comparator is given, is exported to alarm.
Further, the alarm uses the form that buckle is installed with monitoring circuit, fastener is opened, by the alarm
It is enclosed on monitoring circuit, then closes fastener, causes current transformer and detection coil to be enclosed on measure loop.
Further, the fastener is buckle or screw or jump ring.
Further, in addition to：Energy is collected and current detecting unit, the energy collect and current detecting unit with it is described
Idle arc detection unit, waveform processing circuit, pulse processing circuit and alarm connection, and the Current Mutual Inductance with outside
Device, power supply unit connection, the energy is collected and current detecting unit is used to collect energy from the current transformer, will be collected
Energy powered to said supply unit, alarm, idle arc detection unit and monostable circuit, and detection user bear
The current value of load.
The electric arc alarm without externally fed according to embodiments of the present invention, using in idle arc detection unit extremely
Few one group of measure loop detects whether arc fault occur, and the energy that will be gathered using energy acquisition circuit from current transformer
There is provided to power supply unit, to realize without externally fed and wiring with regard to the arc fault of ac power supply circuit can be monitored, concurrently
Go out sound or other warning information.The present invention can be widely applied to arc fault alarm, and distribution box temperature alarm, cable connects
The temperature alarm and cable duct temperature alarming of head etc. occasion.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the structure chart of the electric arc alarm without externally fed according to the embodiment of the present invention；
Fig. 2 a and Fig. 2 b are the scheme of installation of the alarm according to the embodiment of the present invention；
Fig. 3 is the circuit diagram of the idle electric arc monitoring unit of the embodiment of the present invention；
Energy collections and the circuit diagram of current detecting unit of the Fig. 4 for the embodiment of the present invention；
Fig. 5 a are the circuit diagram of the temperature detection of the embodiment of the present invention；
The circuit diagram that Fig. 5 b detect for the loop current of the embodiment of the present invention；
Fig. 5 c are the circuit diagram of the RC integrating circuit of the embodiment of the present invention；
Fig. 5 d are the circuit diagram of the monostable circuit of the embodiment of the present invention；
Fig. 6 is the circuit diagram of the pulse processing circuit of the analog form of the embodiment of the present invention；
Fig. 7 is the structure chart of the electric arc alarm without externally fed of another embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of embodiment is shown in the drawings, wherein identical from beginning to end
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
As shown in figure 1, the electric arc alarm without externally fed of the embodiment of the present invention, including：Idle arc-detection list
First 1 (including detection coil), waveform processing circuit 2, pulse processing circuit 9, alarm 42, power supply unit 6.Need explanation
It is that Fig. 1 is the schematic diagram after detection coil summation current transformer iron core is closed.
Specifically, waveform processing circuit 2 is connected with idle arc detection unit 1 and pulse processing circuit 9, pulse processing
Circuit 9 is connected with alarm 42.
Idle arc detection unit 1 includes at least one set of measure loop and at least one switch element, when generation electric arc
During failure, because the electric current under arc fault has larger high fdrequency component, when every group of measure loop can drive corresponding open
Unit conducting is closed, during output pulse signal, then judges to detect arc signal, the pulse signal of output is sent to waveform processing
Circuit 2.In one embodiment of the invention, switch element uses the metal-oxide-semiconductor or triode or super low-power consumption collection of Low threshold
Into circuit.
In one embodiment of the invention, at least one set of measure loop includes at least one detection coil or at least one
The external capacitive of individual detection coil and equivalent amount is constituted, and specifically includes following three kinds of situations：
(1) 1 detection coil
+ 1 electric capacity of (2) 1 detection coils
1 coil in above-mentioned (1), (2), the combination of+1 electric capacity of 1 coil, as long as can driving switch unit just recognize
It is possible for arc fault, differentiated by waveform processing circuit and pulse processing circuit.
The quantity electric capacity such as (3) two and above detection coil+equivalent amount electric capacity or two and above detection coil+non-
The quantity electric capacity such as two and above detection coil+equivalent amount electric capacity or two and above detection coil+non-
Combination, can only drive all switch elements just to think that arc fault is possible, count relatively to differentiate by software.
Specifically, in order to distinguish normal power network interference signal and fault electric arc signal, using at least one set of measure loop
External capacitive including at least one detection coil or at least one detection coil and equivalent amount is constituted, each detection coil
It could be used without the air core coil of magnetic core or have the coil of magnetic core, the magnetic permeability mu of magnetic core<2000.
With reference to three kinds of forms of above-mentioned measure loop, arc-detection principle is illustrated：
First, the output voltage of the set detection coil of measure loop on the subscriber line be proportional to its detection current value and
Frequency values.Because electric power signal is generally low frequency sine wave signal, the magnitude of voltage that can be exported on measure loop is very low, not enough
Turned on driving switch unit.But fault electric arc signal contains larger high-frequency signal, and the voltage output of detection coil with
The frequency of signal is proportional, and larger magnitude of voltage can be exported on a high frequent signal, can be with driving switch unit.In this hair
In bright one embodiment, obtained through experiment, the voltage that can be exported on a high frequent signal can exceed 1V.
If measure loop is single coil, the output voltage energy driving switch unit conducting of detection coil is thought to have can
There can be arc fault.If measure loop is the measure loop that single coil or single coil and electric capacity are constituted, only examine
Survey time road output voltage can driving switch unit conducting i.e. think to be possible to arc fault；According to two and with
Upper measure loop, only multiple measure loop output voltages can driving switch unit conducting i.e. think to be possible to arc fault
Occur.It is not integral multiple relation between the resonance dot frequency of at least one set of resonant tank, at least one loop uses following sides
Formula is detected to arc signal：Every group of resonant tank can drive corresponding switching means conductive, during output pulse signal, then
Judgement detects arc signal, only when each resonant tank is exported by pulse, is just judged as arc signal.
When not having arc signal, its stand-by power consumption closely 0 microwatt, standby current is triode or Low threshold
The leakage current of metal-oxide-semiconductor.
As shown in figure 3, subscribers' line to be detected is passed through into each detection coil, line fault arc signal is in detection line
Induced voltage on circle, directly or indirectly drives the metal-oxide-semiconductor or triode or ultra-low power consumption integrated circuit of Low threshold, defeated
Go out to waveform processing circuit and pulse processing circuit.
Specifically, detection coil 1 and external capacitor 1 constitute one group of resonant tank, for driving the Low threshold MOS being connected
Pipe or triode or ultra-low power consumption integrated circuit cut-off.Detection coil 2 and external capacitor 2 constitute another group of resonant tank,
For driving cut-offfing for the Low threshold metal-oxide-semiconductor that is connected or triode.
Below to the operation principle of non-power consumption arc detection unit 1：
When subscribers' line has electric arc generation, the high-frequency impulse of generation.Wherein, high-frequency signal is to be compared to power frequency
For 50HZ, 60HZ or intermediate frequency 400HZ, 800HZ, it is at least its more than 10 times frequency.
Induced voltage in each detection coil can directly or indirectly trigger corresponding Low threshold metal-oxide-semiconductor or make three
Pole pipe circuit turn-on, so as to start a waveform processing circuit 2.By the return pulse signal of waveform processing circuit 2, waveform is carried out,
After amplitude, pulse period and width processing, export to pulse processing circuit 9, by pulse processing circuit 9 according to pulse signal and right
Pulse number carries out counting processing, to judge whether to detect arc fault.
Waveform processing circuit 2 has 2 kinds of processing modes, digital form and analog form：
Digital form, pulse output signals are exported to 1 monostable electricity after digital hysteresis comparator carries out waveform shaping
Road, produces the signal of a fixed pulse width, such as 200 milliseconds；Export to a counter, counted, monostable electricity simultaneously
The fixed pulse width signal of road output is inputted as the gate of counter；Such as counter maximum count value is 16, if counted
Device produces spilling, then output alarm signal.At the end of fixed pulse width signal, clear 0 processing is carried out to counter.
With reference to Fig. 5 c, Fig. 5 d and Fig. 6, analog form, pulse signal is after digital hysteresis comparator carries out waveform shaping
Export the signal that a fixed pulse width is produced to a monostable circuit, such as 1 millisecond；The signal gives RC integrating circuit,
The time constant of RC integrating circuit is much larger than the width of pulse signal, such as 10 times；Exporting for RC integrating circuit is compared to sluggishness
The input of device, sets the comparing voltage value of comparator so that after 16 and above pulse are received in the time in setting, than
Compared with device reversion, output alarm signal.
Alarm 42 receives the alarm command for carrying out pulse processing circuit 2, and sends electric arc alarm signal according to alarm command,
To point out user.In one embodiment of the invention, alarm 42 includes alarm unit and wireless signal transmission unit 41,
Wireless signal transmission unit 41 receives the alarm command from pulse processing circuit, and carries out alert process.Wherein,
Wireless signal transmitter uses the wireless communication mode of one of following form：Zigbee, LoRa, LoRaWAN, NBIOT etc. other
Wireless communication mode.
Wireless signal transmitter uses ZIGBEE, LORA, and LORAWAN or other wireless communication modes are, it is necessary to configure
One center, receives radio alarming information, carries out alert process.It is primarily adapted for use in nobody live occasion of alarm.
Alarm unit sends one or more electric arc alarm signals, electric arc alarm signal is using at least according to alarm command
A kind of following form：Sound, light, vibration, non-modulation radio signal, the radio signal of modulation.
In one embodiment of the invention, when alarm unit uses voice guard 42, it includes：Peripheral drive circuit
Constituted with piezoelectric ceramic alarm 42 and corresponding resonant cavity, pulse processing circuit provides alarm signal, and then alarm 42 leads to
Electricity, the sounding of alarm 42.Otherwise alarm 42 is powered off, alarm 42 not sounding, not power consumption.
As shown in fig. 7, energy collection and current detecting unit 3 are connected with current transformer, power supply unit 6, non-power consumption
Arc detection unit 1, waveform processing circuit, pulse processing circuit 2 and alarm 42 are connected.
Energy is collected and current detecting unit 3 is used to collect energy from current transformer (7), by the energy of collection to power supply
Unit 6, alarm 42, idle arc detection unit 1 (including detection coil 8) and monostable circuit 2 are powered, and detection is used
The current value of family load.
Specifically, as shown in figure 4, energy is collected and current detecting unit 3 collects skill from the energy of current transformer power taking
Art, by user load current-induced secondary transformer energy, be can power supply unit 6 charge so that whole alarm
42 do not need externally fed can normal work；
Power supply unit 6 is collected and current detecting unit 3, temperature with idle arc detection unit 1, alarm 42, energy
The grade of parameter detecting unit 5 is connected, to be powered to above-mentioned device.
In one embodiment of the invention, power supply unit 6 can be non-rechargeable battery, rechargeable battery, super capacitor.
Energy is collected and current detecting unit 3, is collected energy from the output of current transformer, is powered to power supply unit 6.And
And detection subscribers' line operating current.
With reference to Fig. 4, the output of current transformer collects circuit after rectifier bridge rectifying and wave-filtering to energy, is collected by energy
Circuit is powered to power supply unit 6.CT mutual inductor ratio will obtain very big, such as and 2000：1, such transformer can export ratio
Higher voltage, enables to rectifier bridge to turn on.Under 0.5A loading condition, 1v about 0.25mA can be about exported, about
0.25mw power, it is contemplated that stand-by power consumption is less than 10uW level, it is sufficient to give rechargeable battery charging, many energy are collected at present
Integrated circuit can meet the requirement.Under conditions of load current is bigger, the power of output can be bigger.It ensure that report
The work steady in a long-term of alert device 42.The circuit is also responsible for the detection of electric current, and its signal is compared with setting electric current value, when more than
Setting electric current value then comparator output signal, after RC integrating circuit and hysteresis comparator, output current alarm signal.
With reference to Fig. 5 a and Fig. 5 b, present invention additionally comprises ambient parameter detection unit, collected with energy and current detecting unit
Connection, for monitoring of environmental temperature and loop current, temperature exceedes circuit configuration value and exceeded more than setting time, or electric current
Setting value and more than setting time, triggering warning circuit alarm.
Temperature detecting unit is that temperature sensor constitutes bridge circuit with resistance, and it exports one comparator circuit of access,
When temperature exceedes setting value, comparator output signal after RC integrating circuit, is exported to hysteresis comparator.
In one embodiment of the invention, alarm 42 uses the form that buckle is installed with monitoring circuit, installs simple,
Mounting means without wiring.As shown in Figure 2 a, fastener is opened, alarm 42 is enclosed on the loop of monitoring, then closed
Fastener, to cause current transformer and detection coil to be enclosed on measure loop.It can work as shown in Figure 2 b.
It is preferred that, fastener is buckle or screw or jump ring.
The electric arc alarm without externally fed according to embodiments of the present invention, using in idle arc detection unit extremely
Few one group of measure loop detects whether arc fault occur, and the energy that will be gathered using energy acquisition circuit from current transformer
There is provided to power supply unit, to realize without externally fed and wiring with regard to the arc fault of ac power supply circuit can be monitored, concurrently
Go out sound or other warning information.The present invention can be widely applied to arc fault alarm, and distribution box temperature alarm, cable connects
The temperature alarm and cable duct temperature alarming of head etc. occasion.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.The scope of the present invention
By appended claims and its equivalent limit.
Claims (8)
1. a kind of electric arc alarm without externally fed, it is characterised in that including：Idle arc detection unit, waveform processing
Circuit, pulse processing circuit, alarm, power supply unit, wherein, the waveform processing circuit and the idle arc-detection list
Member and pulse processing circuit connection, the pulse processing circuit is connected with the alarm, said supply unit with it is described idle
Consume arc detection unit, waveform processing circuit, pulse processing circuit, alarm connection；
The idle arc detection unit includes at least one set of measure loop and at least one switch element, when generation electric arc event
During barrier, because the electric current under arc fault has a larger high fdrequency component, the voltage of every group of measure loop sensing can drive pair
The switching means conductive answered, during output pulse signal, then judges to detect arc signal, the pulse signal of output is sent to institute
State waveform processing circuit；
The waveform processing circuit is used to receive the pulse signal, the amplitude of pulse signals, and waveform and cycle and pulse are wide
Degree is handled, and is exported to pulse processing circuit, if pulse processing circuit is digital, produces the letter of a given pulsewidth
Number and a pulse signal；If pulse processing circuit is simulation, a signal for determining pulsewidth is produced；
The pulse processing circuit is used to carry out counting processing to pulse number according to the pulse signal, to judge whether detection
To arc fault, including：The pulse processing circuit is then logically realized in given pulse width if numeral
Step-by-step counting is carried out in time, count value then exports an alarm signal more than setting value, it is believed that have arc fault；It is described
Pulse processing circuit is if simulation, then the signal of waveform processing circuit output, by a RC integrating circuit, if integration electricity
The threshold value of the output more than output comparator on road, then export an alarm signal, it is believed that have arc fault；
The alarm receives the alarm command for carrying out the pulse processing circuit, and sends electric arc alarm according to the alarm command
Signal, to point out user.
2. the electric arc alarm as claimed in claim 1 without externally fed, it is characterised in that it is single that the alarm includes alarm
Member and wireless signal transmission unit,
The wireless signal transmission unit receives the alarm command from the pulse processing circuit, and carries out alert process；
The alarm unit sends electric arc alarm signal according to the alarm command, the electric arc alarm signal use at least with
A kind of lower form：Sound, light, vibration, non-modulation radio signal, the radio signal of modulation.
3. the electric arc alarm as claimed in claim 2 without externally fed, it is characterised in that the wireless signal transmitter is adopted
With the wireless communication mode of one of following form：Zigbee、LoRa、LoRaWAN、NBIOT.
4. the electric arc alarm as claimed in claim 1 without externally fed, it is characterised in that at least one set of measure loop
Including at least one detection coil, each detection coil could be used without the air core coil of magnetic core or have the coil of magnetic core；
The switch element uses the metal-oxide-semiconductor or triode or ultra-low power consumption integrated circuit of Low threshold.
5. the electric arc alarm as claimed in claim 1 without externally fed, it is characterised in that the pulse processing circuit is taken
The way of realization of analog circuit or the way of realization of digital circuit, enter the processing of horizontal pulse, including：Judge in the given time
Whether the number of interior pulse exceedes setting value, if no more than arc fault has been not considered as if setting value, then recognizes more than setting value
For for arc fault.
6. the electric arc alarm as claimed in claim 5 without externally fed, it is characterised in that also include：Ambient parameter is detected
Unit, the ambient parameter detection unit is collected with the energy and current detecting unit is connected, for monitoring of environmental temperature and
Loop current, temperature exceedes circuit configuration value and exceedes setting value and more than setting time more than setting time, or electric current, touches
Transmit messages alert circuit alarm.
7. the electric arc alarm as claimed in claim 1 without externally fed, it is characterised in that the alarm and monitoring circuit
The form installed using buckle, is opened fastener, the alarm is enclosed on monitoring circuit, fastener is then closed, so that
Obtain current transformer and detection coil is enclosed on measure loop, wherein, the fastener is buckle or screw or jump ring.
8. the electric arc alarm as claimed in claim 1 without externally fed, it is characterised in that also include：Energy is collected and electricity
Detection unit is flowed, the energy is collected and current detecting unit and the idle arc detection unit, waveform processing circuit, arteries and veins
Process circuit and alarm connection are rushed, and is connected with outside current transformer, power supply unit, the energy is collected and electric current
Detection unit is used to collect energy from the current transformer, by the energy of collection to said supply unit, alarm, idle
Arc detection unit and monostable circuit are powered, and detect the current value of user load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710693775.5A CN107300662B (en) | 2017-08-14 | 2017-08-14 | Arc alarm without external power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693775.5A CN107300662B (en) | 2017-08-14 | 2017-08-14 | Arc alarm without external power supply |
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| CN107300662A true CN107300662A (en) | 2017-10-27 |
| CN107300662B CN107300662B (en) | 2020-07-28 |
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| CN201710693775.5A Active CN107300662B (en) | 2017-08-14 | 2017-08-14 | Arc alarm without external power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703426A (en) * | 2017-11-27 | 2018-02-16 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN109212387A (en) * | 2017-07-06 | 2019-01-15 | 默森美国纽柏立波特-马萨诸塞州有限责任公司 | The method for carrying out alternating current arc fault detection using multidimensional energy point |
| CN109239561A (en) * | 2018-11-29 | 2019-01-18 | 宁波习羽智能科技有限公司 | Slave, host and detector for split type fault electric arc detector |
| CN110763941A (en) * | 2019-11-12 | 2020-02-07 | 北京腾控科技有限公司 | Fault arc detection method based on arc pulse signal amplitude characteristics |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5047724A (en) * | 1989-12-19 | 1991-09-10 | Bell Communications Research, Inc. | Power cable arcing fault detection system |
| US5228011A (en) * | 1991-05-13 | 1993-07-13 | Southwest Research Institute | Variable multi-stage arc discharge acoustic pulse source transducer |
| CN1276061A (en) * | 1997-08-14 | 2000-12-06 | 亨德里机械工厂 | Electric arc monitoring systems |
| CN1743859A (en) * | 2004-09-04 | 2006-03-08 | 应用材料股份有限公司 | Detection and suppression circuit and method of electrical arcing |
| CN101702936A (en) * | 2007-06-08 | 2010-05-05 | 株式会社普来马特 | Arc detecting apparatus and arc monitoring method using the same |
| CN101706527A (en) * | 2009-10-30 | 2010-05-12 | 西安交通大学 | Method for detecting arc faults based on time-frequency characteristics of high-frequency current component |
| CN102460188A (en) * | 2009-04-16 | 2012-05-16 | 全景电力有限公司 | Apparatus and methods thereof for power consumption measurement at circuit breaker points |
| CN103415972A (en) * | 2011-03-11 | 2013-11-27 | 西门子工业公司 | Methods, systems, and apparatus and for detecting parallel electrical arc faults |
| CN104049183A (en) * | 2013-03-15 | 2014-09-17 | 森萨塔科技麻省公司 | Home run arc detection at the photovoltaic string level using multiple current sensors |
| CN203981770U (en) * | 2014-07-21 | 2014-12-03 | 上海品研测控技术有限公司 | A kind of circuit for arc fault detection |
| CN104321942A (en) * | 2012-06-15 | 2015-01-28 | 郑台暎 | Power blocking apparatus capable of blocking power supplied by detecting various arcs and overloads |
| CN106159890A (en) * | 2015-04-27 | 2016-11-23 | 施耐德电器工业公司 | Earth leakage protective device and earth leakage protecting method |
| EP3171472A1 (en) * | 2015-11-20 | 2017-05-24 | Delta Electronics, Inc. | Arc detection apparatus |
-
2017
- 2017-08-14 CN CN201710693775.5A patent/CN107300662B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5047724A (en) * | 1989-12-19 | 1991-09-10 | Bell Communications Research, Inc. | Power cable arcing fault detection system |
| US5228011A (en) * | 1991-05-13 | 1993-07-13 | Southwest Research Institute | Variable multi-stage arc discharge acoustic pulse source transducer |
| CN1276061A (en) * | 1997-08-14 | 2000-12-06 | 亨德里机械工厂 | Electric arc monitoring systems |
| CN1743859A (en) * | 2004-09-04 | 2006-03-08 | 应用材料股份有限公司 | Detection and suppression circuit and method of electrical arcing |
| CN101702936A (en) * | 2007-06-08 | 2010-05-05 | 株式会社普来马特 | Arc detecting apparatus and arc monitoring method using the same |
| CN102460188A (en) * | 2009-04-16 | 2012-05-16 | 全景电力有限公司 | Apparatus and methods thereof for power consumption measurement at circuit breaker points |
| CN101706527A (en) * | 2009-10-30 | 2010-05-12 | 西安交通大学 | Method for detecting arc faults based on time-frequency characteristics of high-frequency current component |
| CN103415972A (en) * | 2011-03-11 | 2013-11-27 | 西门子工业公司 | Methods, systems, and apparatus and for detecting parallel electrical arc faults |
| CN104321942A (en) * | 2012-06-15 | 2015-01-28 | 郑台暎 | Power blocking apparatus capable of blocking power supplied by detecting various arcs and overloads |
| CN104049183A (en) * | 2013-03-15 | 2014-09-17 | 森萨塔科技麻省公司 | Home run arc detection at the photovoltaic string level using multiple current sensors |
| CN203981770U (en) * | 2014-07-21 | 2014-12-03 | 上海品研测控技术有限公司 | A kind of circuit for arc fault detection |
| CN106159890A (en) * | 2015-04-27 | 2016-11-23 | 施耐德电器工业公司 | Earth leakage protective device and earth leakage protecting method |
| EP3171472A1 (en) * | 2015-11-20 | 2017-05-24 | Delta Electronics, Inc. | Arc detection apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 董爱华，吕辉，苏波: "低压配电箱故障电弧信号在线检测与报警系统", 《电测与仪表》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212387A (en) * | 2017-07-06 | 2019-01-15 | 默森美国纽柏立波特-马萨诸塞州有限责任公司 | The method for carrying out alternating current arc fault detection using multidimensional energy point |
| CN109212387B (en) * | 2017-07-06 | 2020-12-29 | 默森美国电力股份有限公司 | Method for AC arc fault detection using multi-dimensional energy points |
| CN107703426A (en) * | 2017-11-27 | 2018-02-16 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN107703426B (en) * | 2017-11-27 | 2019-11-12 | 北京腾控科技有限公司 | A kind of fault arc detection method detected by electric arc pulse signal starting |
| CN109239561A (en) * | 2018-11-29 | 2019-01-18 | 宁波习羽智能科技有限公司 | Slave, host and detector for split type fault electric arc detector |
| CN110763941A (en) * | 2019-11-12 | 2020-02-07 | 北京腾控科技有限公司 | Fault arc detection method based on arc pulse signal amplitude characteristics |
| CN110763941B (en) * | 2019-11-12 | 2022-04-26 | 北京腾控科技有限公司 | Fault arc detection method based on arc pulse signal amplitude characteristics |
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