CN206300990U - Surge current detection device - Google Patents
Surge current detection device Download PDFInfo
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- CN206300990U CN206300990U CN201621455866.2U CN201621455866U CN206300990U CN 206300990 U CN206300990 U CN 206300990U CN 201621455866 U CN201621455866 U CN 201621455866U CN 206300990 U CN206300990 U CN 206300990U
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Abstract
The various embodiments of the disclosure provide a kind of surge current detection device, including：Current signal acquisition module, is configured as obtaining data signal corresponding with the electric current for flowing through surge protective device；And microcontroller, it is configured as：Whether it is surge current based on the digital signal detection electric current received from current signal acquisition module, calculates and store the characteristic information relevant with surge current；The surge current detection device is additionally operable to calculate and monitor the life-span of surge protective device according to the characteristic information relevant with surge current for being stored.
Description
Technical field
Embodiment of the disclosure is related to surge current detection device.
Background technology
For various electronic equipments such as power distribution cabinet, communication line etc., due to doing for short circuit, power supply switching or other external worlds
Disturb, can suddenly produce the momentary surges electric current higher than running current, such as lightning current, the momentary surges electric current can be in loop
Other equipment cause damage.In order to avoid above-mentioned situation, it will usually using overcurrent or overvoltage protection to instantaneous wave
Electric current is gushed to be processed, for example, surge protective device can carry out shunting treatment within the extremely short time to surge, so as to reach
Surge is avoided to the purpose of the infringement of other equipment in loop.However, existing surge protective device can be only realized to surge
Shunting, it is impossible to realize detection to surge.
Utility model content
Embodiment of the disclosure aims to provide the surge current detection device for solving the above problems at least in part.
According to some embodiments, there is provided a kind of surge current detection device, including：Current signal acquisition module, is matched somebody with somebody
It is set to acquisition data signal corresponding with the electric current for flowing through surge protective device；And microcontroller, it is configured as：Based on from electricity
Whether the digital signal detection electric current that stream signal acquisition module is received is surge current, and is wave in response to detecting electric current
Gush electric current, storage and current related characteristic information.
According to the surge current detection device of the embodiment of the present disclosure, leading to surge current signal acquisition module will likely include hardly possible
Corresponding data signal is converted to the electric current of the momentary surges electric current for detecting, to enable that microcontroller is believed according to the electric current
The data signal that number acquisition module gets, determines whether the electric current is surge current.If it is surge electricity to detect the electric current
Stream, storage and the current related characteristic information, such as current peak, current waveform, enable a user to based on this feature
Information, knows the concrete condition of flowed surge current.
In certain embodiments, current signal acquisition module includes：Current sensor, is configured as that surge protection will be flowed through
The electric current of device is converted to differential current signals；Integrating circuit, is configured as the differential current to being received from current sensor
Signal is integrated, with the current signal after being restored；Amplifying circuit, is configured as the electric current to being received from integrating circuit
Signal is amplified, to obtain amplification current signal；Analog-digital converter, is configured as the amplification electricity that will be received from amplifying circuit
Stream signal is converted to data signal.
In certain embodiments, current sensor includes Rogowski coil.Rogowski coil has measurement range big, high precision
Feature, and also there is simple structure, small volume, the advantage in the structure such as lightweight.
In certain embodiments, Rogowski coil includes printing board PCB Rogowski coil.The traditional coiling sieve formula line of contrast
Circle, more preferably, coiling is more evenly distributed PCB Rogowski coils stability, and mutual inductance is smaller.An equal amount of surge current of correspondence,
The differential signal of output it is smaller, it is necessary to electric clearance it is also smaller, while remaining the undersaturated characteristic of coiling Rogowski coil.
In certain embodiments, integrating circuit includes resistance capacitance RC integrating circuit.The simple structure of RC integrating circuit,
There is response well under high frequency, be especially suitable for the integration of momentary surges electric current.
In certain embodiments, integrating circuit and amplifying circuit are configured with DC offset voltage.
In certain embodiments, analog-digital converter includes the analog-digital converter with successive approximation register type SAR structures.
Because the analog-digital converter of SAR structures has sample rate higher, and the frequency of surge current signal is general very high, therefore, it is possible to
Enough points are gathered within a short period of time, and then are able to ensure that the accuracy of current detecting.
In certain embodiments, resistance/capacitance buffering area, resistance/electricity are connected between amplifying circuit and analog-digital converter
Hold buffering area to be configured as being made up of resistance and capacitances in series.The conversion accuracy of analog-digital converter can be improved.
In certain embodiments, the capacitance of resistance/capacitance buffering area is the 40-100 of the sampling capacitance of analog-digital converter
Times.On the premise of circuit stability is ensured, the conversion accuracy of analog-digital converter is improved as much as possible.
In certain embodiments, microcontroller is configured as：Data signal is compared with predetermined threshold；And when number
When word signal is more than predetermined threshold, determine that electric current is surge current.
In certain embodiments, electric current includes surge current.When electric current is surge current, can realize to surge current
Detection.
In certain embodiments, current sensor is configured as the surge protection module being connected in surge protective device
Upstream position.
In certain embodiments, surge protection module includes piezo-resistance and gas-discharge tube GDT.
In certain embodiments, microcontroller be additionally configured to when surge protection module be piezo-resistance when, based on electricity
The life-span reference data of the relevant characteristic information of stream and piezo-resistance determines the residual life of piezo-resistance.By detected
The characteristic information related to electric current, determines the residual life of piezo-resistance, and user can be made to know the ageing state of piezo-resistance,
So that user is in the case where knowing that the piezo-resistance residual life is few, change in time the piezo-resistance or including
The surge protective device of the piezo-resistance, it is to avoid because the pressure responsive resistor failure causes to damage to equipment.
In certain embodiments, microcontroller is additionally configured to when surge protection module is piezo-resistance, in pressure-sensitive electricity
When the residual life of resistance is less than threshold value, alarm signal is sent.
In certain embodiments, microcontroller be additionally configured to when surge protection module be GDT when, based on it is current related
Characteristic information determine the source of damage of GDT.
In certain embodiments, characteristic information include it is following at least one：Data signal；The analog waveform of electric current；Electric current
Pulsewidth；The peak value of the corresponding analog waveform of electric current；The time that electric current is spent from 0 the first predetermined ratio for rising to peak value；
And the time that second predetermined ratio of the electric current from peak atenuation to peak value is spent.
It should be appreciated that utility model content part is not intended to identify the key or key character of embodiment of the disclosure,
Also it is not intended to for limiting the scope of the present disclosure.The further feature of the disclosure will be easy to understand by following description.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the disclosure, constitutes the part of the application, this public affairs
The schematic description and description opened does not constitute improper restriction of this disclosure for explaining the disclosure, wherein：
Fig. 1 shows the surge current detection device structure chart according to the embodiment of the present disclosure；
Fig. 2 shows a kind of circuit diagram of the RC integrating circuit according to the embodiment of the present disclosure；
Fig. 3 shows a kind of circuit diagram of the amplifying circuit according to the embodiment of the present disclosure；
Fig. 4 shows a kind of circuit diagram of the resistance/capacitance buffering area according to the embodiment of the present disclosure；
Fig. 5 A show the electric current actual waveform according to the embodiment of the present disclosure；
Fig. 5 B to show and obtain what is recovered after data signal is linearly fitted by analog-digital converter according to the embodiment of the present disclosure
The schematic diagram of current waveform.
In all of the figs, same or similar reference numeral represents same or similar element.
Specific embodiment
The principle of the disclosure is described referring now to some example embodiments.It is appreciated that these embodiments are merely for saying
Bright and help with the purpose for implementing the disclosure it will be understood by those skilled in the art that describe, rather than advise scope of this disclosure
Any limitation.Content of this disclosure described here can be implemented in the various modes outside mode described below.
As herein, term " including " and its various variants be construed as open-ended term, it means that " including but
It is not limited to ".Term "based" is construed as " being based at least partially on ".Term " one embodiment " is construed as
" at least one embodiment ".Term " another embodiment " is construed as " at least one other embodiment ".
Fig. 1 shows the structure chart of surge current detection device 100 according to the embodiment of the present disclosure.As shown in figure 1, surge is electric
Flow detection device 100 generally comprises current signal acquisition module 1 and microcontroller 2, wherein, the quilt of current signal acquisition module 1
It is configured to obtain the corresponding data signal of electric current for flowing through surge protective device；Microcontroller 2 is configured as being based on from electric current letter
Whether the digital signal detection electric current that number acquisition module 1 is received is surge current, and in response to detecting electric current for surge
Electric current, storage and current related characteristic information.
Wherein, the surge protective device can be overvoltage protection, or overcurrent protection, the disclosure
Embodiment is not construed as limiting to the particular type of the surge protective device.
Because the electric current for flowing through surge protective device may be instantaneous lightning current, it is also possible to other surge currents, when this
When electric current is instantaneous lightning current, surge protective device or the other equipment being connected with the surge protective device may be caused
Infringement, in order to detect whether the type and other features of the surge current that surge current and generation occur, it is necessary to the electric current
Detected.
Surge current detection device 100 according to the embodiment of the present disclosure, logical surge current signal acquisition module 1 will likely be wrapped
The electric current for including the momentary surges electric current for being difficult to detect is converted to corresponding data signal, to enable microcontroller 2 according to this
The data signal that current signal acquisition module 1 gets, determines whether the electric current is surge current, if detect the electric current being
Surge current, storage and the current related characteristic information, such as current peak, current waveform, enable a user to be based on
This feature information, knows the concrete condition of flowed surge current.
As shown in figure 1, current signal acquisition module 1 in surge current detection device 100 include current sensor 101,
Integrating circuit 102, amplifying circuit 103 and analog-digital converter 104.Wherein, current sensor 101, are configured as that surge will be flowed through
The electric current of protection device is converted to differential current signals；Integrating circuit 102, is configured as to being received from current sensor 101
Differential current signals be integrated, with the current signal after being restored；Amplifying circuit 103, is configured as to electric from integration
The current signal that road 102 receives is amplified, to obtain amplification current signal；Analog-digital converter 104, is configured as from putting
The amplification current signal that big circuit 103 is received is converted to data signal.
In disclosure one embodiment, current sensor 101 is around the circuit flowed through by electric current, such as surge protective device
Principal phase line, or the electric wire for flowing through other electric currents to be detected.The input of the current sensor 101 is to flow through surge protective device
Electric current, be output as the differential signal of the electric current；For example, when the electric current is surge current, it is surge current to be input into, and is output as
The differential of surge current.
In this embodiment, current sensor 101 can use Rogowski coil, and Rogowski coil has measurement range big, smart
The characteristics of spending high, and also there is simple structure, small volume, the advantage in the structure such as lightweight.
Further, the Rogowski coil can also be PCB (Printed Circuit Board, printed circuit board) Roche
Coil.Compared with common coiling Rogowski coil, more preferably, coiling is more evenly distributed PCB Rogowski coils stability, and mutual inductance is more
It is small.An equal amount of surge current of correspondence, the differential signal of output is smaller, and the electric clearance for needing is also smaller, while protecting
The undersaturated characteristic of coiling Rogowski coil is stayed.
The input signal of integrating circuit 102 is the output of current sensor 101, the i.e. differential signal of electric current, and it is right to be output as
The corresponding integrated signal of the integral result of the differential signal, i.e. electric current.By the integrating circuit 102 to the integration of differential signal,
The waveform of the electric current can completely be recovered in proportion, be further to detect that the electric current lays the foundation.
In disclosure one embodiment, integrating circuit 102 uses RC integrating circuit, Fig. 2 to show according to disclosure reality
Apply a kind of circuit diagram of RC integrating circuit of example.The simple structure of RC integrating circuit, there is response well in high frequency, especially fits
Close the integration of momentary surges electric current.
As shown in Fig. 2 the in and out in figure represent the input and output end of the RC circuits, the electricity shown in figure respectively
Resistance and capacitance are for reference only, are not used in the restriction disclosure, and the resistance value and capacitance in concrete application can be according to electricity
The coil mutual inductance coefficient or other specification of flow sensor 101 are accordingly adjusted, and the embodiment of the present disclosure in the RC integrating circuit to being adopted
The design parameter value of resistance and electric capacity is not construed as limiting.
In order to drive analog-digital converter and to greatest extent using analog-digital converter dynamic range, by integration
Circuit 102 after the waveform of restoring current, is configured with amplification electricity between integrating circuit 102 and analog-digital converter 104 in proportion
Road 103.The amplifying circuit 103 is amplified treatment to integrated signal, to enable that the maximum of integrated signal reaches modulus
The gamut of converter 104；And the amplifying circuit 103 can also increase the driving force of integrated signal, so that modulus
The output of converter 104 is more stablized.
Fig. 3 shows a kind of circuit diagram of the amplifying circuit 103 according to the embodiment of the present disclosure.The in that is marked in Fig. 3 and
The pin of out respectively to should amplifying circuit 103 input and output end.
It should be noted that may have positive and negative both direction due to flowing through the momentary surges electric current of surge protective device, because
This does not select the ground level of system generally as the reference of signal, but is each equipped with integrating circuit 102 and amplifying circuit 103
DC offset voltage, i.e., using the DC offset voltage as the reference of signal, the embodiment of the present disclosure is to the direct current biasing that is configured
The size of voltage is not construed as limiting.As shown in Figures 2 and 3, the size of the DC offset voltage to be configured is 1.5V to exemplify
The schematic diagram of corresponding circuits.
In disclosure one embodiment, analog-digital converter 104 is used for the amplification signal sampling to electric current, to obtain and flow
Through the corresponding data signal of the electric current of surge protective device.Because the purpose of the surge current detection device 100 is to detect wave
Electric current is gushed, in view of surge current can rise to a great value within the extremely short time, it is therefore desirable to which the digital-to-analogue for being used turns
Parallel operation has sample frequency higher.
By taking the surge current of 8/20us as an example, the configuration to the analog-digital converter 104 is specifically described.Wherein, 8/
The surge current of 20us refers to rise to 90% time for being spent of peak value for 8us from 0, and peak value is risen to again from peak value from 0
50% time for being spent for dropping to peak value is the electric current of 20us.In order to recover the surge electricity after sampling as precisely as possible
The waveform of stream, rising edge for the waveform of the surge current are, it is necessary to sample at 1 points, so the sampling interval is 2us,
Sample frequency is at least 500KSPS.Based on the sample frequency, the analog-digital converter 104 that will can be used is configured with
The analog-digital converter of SAR (Successive Approximation Register, successive approximation register) structure.
For reduces cost and power consumption, the analog-digital converter 104 is configurable to the embedded analog-to-digital conversion in microcontroller 2
Device such that it is able to avoid increasing a single analog-digital converter 104 in addition in the current sensing means 100.For using
The situation of the embedded analog-digital converter 104 of microcontroller 2, the current signal acquisition module 1 only includes current sensor 101, product
Parallel circuit 102 and amplifying circuit 103, the current signal acquisition module 1 are configured as the electricity for obtaining with flowing through surge protective device
Flow the amplification current signal of corresponding analog current signal.The microcontroller 2 is arranged to that mould will be obtained from the current signal
Block 1 receives the amplification current signal, and the amplification current signal is sampled, to obtain and flow through the surge protective device
The corresponding data signal of electric current, and then determine whether the electric current is surge current and is surge electricity in response to detecting the electric current
Stream, storage and the current related characteristic information.
Fig. 4 shows a kind of circuit diagram of the resistance/capacitance buffering area 105 according to the embodiment of the present disclosure.In order to improve mould
The conversion accuracy of number converter 104, increases resistance/electricity between the output of amplifying circuit 103 and the input of analog-digital converter 104
Hold buffering area 105, the resistance/capacitance buffering area 105 is configured as being made up of resistance and capacitances in series.
The capacitance of the electric capacity in the resistance/capacitance buffering area 105 shown in Fig. 4 can be the sampling of analog-digital converter 104
The 40-100 of electric capacity, the bigger result of capacitance is more stable within the range, but if the capacitance crosses conference causes circuit not
Stabilization, in order to improve the stability of circuit, select the resistance/capacitance buffering area 105 in electric capacity capacitance after, it is necessary to
The stability of circuit is verified by emulating, if unstable, it is necessary to change the electric capacity, with the basis for ensuring circuit stability
On, improve the precision of analog-digital converter 104.
Because the sample frequency of analog-digital converter 104 is high, data throughout is big, therefore is got in analog-digital converter 104
After data signal corresponding with electric current, can should using DMA (Direct Memory Access, direct memory access)
The output signal of analog-digital converter 104 is sent to RAM (the Random Access Memory, random access memory of microcontroller 2
Device) in.
The data signal that microcontroller 2 is additionally configured to obtain analog-digital converter 104 is compared with predetermined threshold；When
When data signal is more than predetermined threshold, determine that the electric current is surge current.Wherein, the predetermined threshold can be more than normal work
Any number of the several times (be more than 1) of electric current, the embodiment of the present disclosure is to the specific determination method of the predetermined threshold and is determined
Concrete numerical value be not construed as limiting.
Microcontroller 2 is configured to respond to the electric current for surge current, stores and the current related characteristic information.Should
Characteristic information can be including at least one in following characteristics：Data signal；The analog waveform of electric current；The pulsewidth of electric current；Electric current
The peak value of corresponding analog waveform；The time that electric current is spent from 0 the first predetermined ratio for rising to peak value；And electric current is from 0
Rise to the time that second predetermined ratio of the peak value again from peak atenuation to peak value is spent.
Wherein, first predetermined ratio and second predetermined ratio can be the arbitrary proportion that can embody current characteristic,
The scope of first predetermined ratio and second predetermined ratio between 0-100%, the embodiment of the present disclosure to this first make a reservation for
The determination method and identified numerical value of ratio and second predetermined ratio are not construed as limiting.
Herein still by taking the surge current of 8/20us as an example, to corresponding to first predetermined ratio and second predetermined ratio
The concrete meaning of time is described separately, and when first predetermined ratio is 90%, electric current is from 0 90% institute for rising to peak value
The time of cost represents the rise time of electric current；When second predetermined ratio is 50%, electric current rises to peak value again from peak from 0
50% time for being spent that value decays to peak value represents intermediate value die-away time of electric current.
Fig. 5 A show the electric current actual waveform according to the embodiment of the present disclosure；Fig. 5 B are shown according to the embodiment of the present disclosure
The schematic diagram of the current waveform for obtaining recovering after data signal is linearly fitted by analog-digital converter 104.The transverse axis of Fig. 5 A and Fig. 5 B
The expression time, the longitudinal axis represents current amplitude；Can be known by Fig. 5 A and Fig. 5 B, the current waveform that recovery is obtained can reappear substantially
Electric current actual waveform, two waveforms only have differences in amplitude, and current amplitude is spent from 0 to the first predetermined ratio of peaking
The pulsewidth of the waveform after the time taken, and the time all same spent to the second predetermined ratio from peak atenuation, and recovery
Pulsewidth with electric current actual waveform is also identical, so, the current sensing means 100 that the disclosure is provided is able to ensure that at utmost
Reproduction electric current actual waveform, therefore the accuracy of current detecting is high.
It should be noted that due to the RAM finite capacities of microcontroller 2, when there is no surge current, for analog-to-digital conversion
The data signal that device 104 gets, can use in the way of the new data cover legacy data for producing, and the storage for saving RAM is held
Amount, to cause, when surge current is produced, to have enough memory capacity to store the characteristic information of surge current.When the electric current is
During surge current, the surge current triggers the microcontroller 2 and produces interruption, and microcontroller 2 is storing the feature of the surge current
After information, the characteristic information that the characteristic information of the surge current is no longer got afterwards is covered.
Further, in order to avoid the RAM lack of memory capacities due to microcontroller 2 lead to not normally detect surge electricity
Stream, in the characteristic information of the surge current in RAM being dumped into additional storage module, the memory module can be to be built in
Memory module, or external single memory module in the microcontroller 2, the embodiment of the present disclosure are not limited this
It is fixed.Additionally, when there is additional storage module, it is also possible to do not cover the characteristic information of running current, with after facilitating user
The change of the characteristic information of the electric current checked in the course of work of device to be protected or surge current protectors.
In another embodiment of the disclosure, because surge current can treat protection device or is connected with the device to be protected
Other equipment is into damage, therefore generally those skilled in the art can be divided surge current using surge current protectors
Stream, to avoid the surge current from causing to damage to equipment.
For example, for surge current, usually used surge protective device have surge current is shunted or
The surge protection module released, the surge protection module includes that (Gas Discharge Tube, gas is put for piezo-resistance and GDT
Fulgurite).However, in actual use, the service life of surge protection module is limited, generally to surge several times
After electric current is shunted or released, or after surge protection module is damaged, will no longer have that to the shunting of surge current or
The effect of releasing.
It should be noted that in the disclosed embodiments, if treat protection device using surge current protectors carried out
Surge current protection, i.e. electric current are that current sensor 101 is configured as being connected to when flowing through the electric current in surge current protectors
The upstream position of the surge protection module in surge current protectors, that is to say, the current sensor 101 is configured as being looped around
On the principal phase line of the electric current to be protected being connected with the current input terminal of surge protection module.
When the surge protection module is piezo-resistance, in order to allow users to know in time the remaining longevity of piezo-resistance
Life, to change so as to avoid leading to not realize the purpose of surge current protection due to pressure responsive resistor failure in time, in the disclosure
Microcontroller 2 be additionally configured to according to the life-span reference data with current related characteristic information and piezo-resistance for being stored
Determine the residual life of piezo-resistance.
Wherein, the life-span reference data of the piezo-resistance can be provided by the manufacturer of piezo-resistance, the piezo-resistance
Life-span reference data can be the surge number of times and residual life that can be born relation table, or the peak value of surge current
Or the relation curve or functional relation of the characteristic information such as pulsewidth and life-span etc., or the reference data of other forms, this public affairs
Embodiment is opened to be not construed as limiting the concrete form of the life-span reference data.
In order to further prevent damage of the surge current to the piezo-resistance in surge current protectors, the microcontroller 2
It is additionally configured to, when the residual life of piezo-resistance is less than threshold value, send alarm signal.The embodiment of the present disclosure is to the threshold value
Determine that method and identified numerical value are not especially limited.
For example, when the life-span reference data of certain piezo-resistance is：The surge electricity that type is 8/20us types can be born
The number of shocks of stream is 20 times, when the characteristic information that basis flows through the electric current correlation of surge protective device has determined the piezo-resistance
Bear 10 surge currents of the type, it is determined that the residual life of the piezo-resistance is the half of initial lifetime.Need explanation
, the example is merely to illustrate the determination method of the residual life of piezo-resistance, is not used in the restriction disclosure.
In some cases, when surge protection module is damaged, user wishes that the damage for knowing the surge protection module is former
Cause, is that this microcontroller 2 is additionally configured to when the surge protection module is GDT, based on believing with current related feature
Breath determines the source of damage of GDT.For example, when certain GDT is when can bear surge current for 4kA (kiloampere), if microcontroller
When the relevant characteristic information that what device was stored flow through the electric current of the GTD includes the surge current of 6kA, it may be determined that cause this
The reason for GDT is damaged is the surge current of the 6kA.It is of course also possible to according to this with current related characteristic information in other
Characteristic information determines the source of damage of GDT, and the embodiment of the present disclosure is not especially limited to this.
The current sensing means 100 that the disclosure is provided can be applied in any equipment there may be surge current or be
In system, it is also possible to apply in the equipment or system including wave current protection device.
In general, although in the superincumbent discussion of details of some specific implementations by comprising, but these should
It is interpreted any limitation of scope of this disclosure, but the description of feature is only directed to specific embodiment.In separate one
Some features described in a little embodiments can also in combination be performed in single embodiment.Conversely, being retouched in single embodiment
The various features stated can also in various embodiments be implemented separately or implement in any suitable subcombination.
Although the disclosure is described with specific structural features, it will be appreciated that limit in the dependent claims
The scope of technical scheme is not necessarily limited to above-mentioned specific features.In other words, the optional reality of the only disclosure described above
Apply example.For a person skilled in the art, embodiment of the disclosure there may be various modifications and variations.It is all in the disclosure
Spirit and principle within any modification, equivalence replacement, the improvement made etc., be all contained within the protection domain of the disclosure.
Claims (17)
1. a kind of surge current detection device (100), including：
Current signal acquisition module (1), is configured as obtaining data signal corresponding with the electric current for flowing through surge protective device；With
And
Microcontroller (2), is configured as：
Whether it is surge electricity based on electric current described in the digital signal detection received from the current signal acquisition module (1)
Stream, and
In response to detecting the electric current for surge current, calculate and store and the current related characteristic information.
2. surge current detection device (100) according to claim 1, the current signal acquisition module (1) includes：
Current sensor (101), the electric current for being configured as flowing through surge protective device is converted to differential current signals；
Integrating circuit (102), is configured as carrying out the differential current signals received from the current sensor (101)
Integration, with the current signal after being restored；
Amplifying circuit (103), is configured as being amplified the current signal received from the integrating circuit (102), to obtain
Current signal must be amplified；
Analog-digital converter (104), is configured as the amplification current signal conversion that will be received from the amplifying circuit (103)
It is the data signal.
3. surge current detection device (100) according to claim 2, it is characterised in that the current sensor (101)
Including Rogowski coil.
4. surge current detection device (100) according to claim 3, it is characterised in that the Rogowski coil includes print
Circuit board PCB Rogowski coils processed.
5. surge current detection device (100) according to claim 2, it is characterised in that integrating circuit (102) bag
Include resistance capacitance RC integrating circuit.
6. surge current detection device (100) according to claim 2, it is characterised in that the integrating circuit (102) and
The amplifying circuit (103) is configured with DC offset voltage.
7. surge current detection device (100) according to claim 2, it is characterised in that the analog-digital converter (104)
Including the analog-digital converter with successive approximation register type SAR structures.
8. surge current detection device (100) according to claim 2, it is characterised in that the amplifying circuit (103) and
Resistance/capacitance buffering area (105), resistance/capacitance buffering area (105) quilt are connected between the analog-digital converter (104)
It is configured to be made up of resistance and capacitances in series.
9. surge current detection device (100) according to claim 8, it is characterised in that the resistance/capacitance buffering area
(105) capacitance is 40-100 times of the sampling capacitance of the analog-digital converter (104).
10. surge current detection device (100) according to claim 1, it is characterised in that microcontroller (2) quilt
It is configured to：
The data signal and predetermined threshold are compared；And
When the data signal is more than the predetermined threshold, determine that the electric current is surge current.
11. surge current detection devices (100) according to claim 1, it is characterised in that the electric current includes surge electricity
Stream.
12. surge current detection devices (100) according to claim 1, it is characterised in that the current sensor
(101) it is configured as the upstream position of surge protection module being connected in the surge protective device.
13. surge current detection devices (100) according to claim 12, it is characterised in that the surge protection module
Including piezo-resistance or gas-discharge tube GDT.
14. surge current detection devices (100) according to claim 13, it is characterised in that the microcontroller (2) is also
When being configured as the surge protection module for piezo-resistance, based on the current related characteristic information and described pressure-sensitive
The life-span reference data of resistance determines the residual life of the piezo-resistance.
15. surge current detection devices (100) according to claim 13, it is characterised in that the microcontroller (2) is also
When being configured as the surge protection module for piezo-resistance, when the residual life of the piezo-resistance is less than threshold value, hair
Go out alarm signal.
16. surge current detection devices (100) according to claim 13, it is characterised in that the microcontroller (2) is also
When being configured as the surge protection module for GDT, based on the damage that the GDT is determined with the current related characteristic information
Bad reason.
17. surge current detection devices (100) according to claim 1, it is characterised in that the characteristic information include with
Descend at least one：
The data signal；
The analog waveform of the electric current；
The pulsewidth of the electric current；
The peak value of the corresponding analog waveform of the electric current；
The time that the electric current is spent from 0 the first predetermined ratio for rising to the peak value；And
The electric current rises to what the peak value was spent from the peak atenuation to the second predetermined ratio of the peak value again from 0
Time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621455866.2U CN206300990U (en) | 2016-12-28 | 2016-12-28 | Surge current detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621455866.2U CN206300990U (en) | 2016-12-28 | 2016-12-28 | Surge current detection device |
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| CN206300990U true CN206300990U (en) | 2017-07-04 |
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| CN201621455866.2U Active CN206300990U (en) | 2016-12-28 | 2016-12-28 | Surge current detection device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765126A (en) * | 2017-10-31 | 2018-03-06 | 华勤通讯技术有限公司 | A kind of method, apparatus and terminal of monitoring terminal surge |
| CN107860998A (en) * | 2017-10-31 | 2018-03-30 | 华勤通讯技术有限公司 | A kind of method and terminal for monitoring electric surge |
| CN108387799A (en) * | 2018-03-06 | 2018-08-10 | 浙江宇视科技有限公司 | Over-pressed analysis system and device |
| CN110907713A (en) * | 2018-09-18 | 2020-03-24 | 施耐德电气工业公司 | Surge protector detection |
| CN114069855A (en) * | 2021-11-11 | 2022-02-18 | 南方电网电力科技股份有限公司 | System and method for monitoring service life of power secondary overvoltage protection equipment |
| CN117929902A (en) * | 2024-03-14 | 2024-04-26 | 浙江泰科天唯电气有限公司 | Composite surge protector detection method, surge protector and storage medium |
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2016
- 2016-12-28 CN CN201621455866.2U patent/CN206300990U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765126A (en) * | 2017-10-31 | 2018-03-06 | 华勤通讯技术有限公司 | A kind of method, apparatus and terminal of monitoring terminal surge |
| CN107860998A (en) * | 2017-10-31 | 2018-03-30 | 华勤通讯技术有限公司 | A kind of method and terminal for monitoring electric surge |
| CN107860998B (en) * | 2017-10-31 | 2021-03-19 | 华勤技术股份有限公司 | Method and terminal for monitoring electrical surge |
| CN108387799A (en) * | 2018-03-06 | 2018-08-10 | 浙江宇视科技有限公司 | Over-pressed analysis system and device |
| CN110907713A (en) * | 2018-09-18 | 2020-03-24 | 施耐德电气工业公司 | Surge protector detection |
| CN114069855A (en) * | 2021-11-11 | 2022-02-18 | 南方电网电力科技股份有限公司 | System and method for monitoring service life of power secondary overvoltage protection equipment |
| CN117929902A (en) * | 2024-03-14 | 2024-04-26 | 浙江泰科天唯电气有限公司 | Composite surge protector detection method, surge protector and storage medium |
| CN117929902B (en) * | 2024-03-14 | 2024-05-24 | 浙江泰科天唯电气有限公司 | Composite surge protector detection method, surge protector and storage medium |
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