CN112630503A - Device structure with direct current and arc discharge current detection, sensor and processing system - Google Patents
Device structure with direct current and arc discharge current detection, sensor and processing system Download PDFInfo
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- CN112630503A CN112630503A CN202011596876.9A CN202011596876A CN112630503A CN 112630503 A CN112630503 A CN 112630503A CN 202011596876 A CN202011596876 A CN 202011596876A CN 112630503 A CN112630503 A CN 112630503A
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- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
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Abstract
The invention discloses a device structure, a sensor and a system with direct current and arc discharge current detection, wherein the device structure comprises: a wire; the first magnetic core is provided with a first gap with a preset size in an open-loop design mode on a preset side wall, and a lead is wound on the surface of the first magnetic core to detect arc discharge current; the second magnetic core is stacked with the first magnetic core, a second gap is designed on the side wall stacked with the preset side wall in an open-loop mode, and the second gap is at least partially communicated with the first gap; the PCB comprises a first part and a second part, the second part is clamped in the two side walls of the second gap, and the first part is abutted with the outer surface of the side wall where the second gap is located; a current detection chip located on the upper surface or the lower surface of the second portion for detecting a direct current; the signal processing module is connected with the first magnetic core and the current detection chip and is used for processing and outputting detected arc discharge current and direct current; the surface of the wire is insulated from the outer surface of the first magnetic core. The scheme can realize direct current and arc discharge current detection at the same time.
Description
Technical Field
The invention relates to the field of group string current and arc discharge current detection equipment, in particular to a device structure, a sensor and a processing system with direct current and arc discharge current detection functions.
Background
The photovoltaic inverter panel is when outdoor live time is longer, phenomena such as cable ageing, contact failure can appear to electric arc can appear in normal use, can appear high temperature when serious and catch fire, have great potential safety hazard, detect through drawing the arc and can in time discover and remove the potential safety hazard, effectively avoided the emergence of above-mentioned potential safety hazard, consequently, draw the arc to the photovoltaic inverter panel and detect and become a current mainstream trend. In addition to detecting the arcing current, direct current signal detection is also essential.
The detection principle of the arc detection device in the prior art is similar to the application of a transformer, and as shown in fig. 1, a large primary side current of the transformer is converted into a small secondary side current according to the electromagnetic induction principle, the current induced by a secondary winding is sampled by a series resistor and then sent to a signal processing module, and the signal processing module restores the original current through the rated mutual inductance ratio of the transformer. The mutual inductance ratio of the transformer is the ratio of rated currents of the primary side primary winding N1 and the secondary side secondary winding N2, or can be approximately expressed as the turn ratio of a primary side primary winding coil and a secondary side secondary winding coil, and the secondary side is arranged in a closed magnetic ring.
The device diagram of the detection device adopted by the direct current detection part is shown in fig. 2a, the circuit diagram is shown in fig. 2b, the primary current passes through the magnetic ring, the magnetic ring generates a magnetic field according to electromagnetic induction, and the sensing chips in the gaps of the magnetic ring are converted into voltage signals according to the induced magnetic field and output so as to facilitate subsequent detection.
In the prior art, the device for detecting the direct current and the device for detecting the arcing current are independent devices, so that the technical problems of large volume and inconvenience for onboard installation are caused.
Therefore, a detection device which has a small size and can simultaneously realize arc discharge current detection and direct current detection is lacked in the prior art.
Disclosure of Invention
Therefore, in order to solve the technical problem that a detection device which is small in size and can simultaneously realize arc discharge current detection and direct current detection is lacked in the prior art, the invention provides a device structure, a sensor and a processing system with direct current and arc discharge current detection.
In a first aspect, a device structure with dc and arcing current detection according to an embodiment of the present invention includes:
a wire;
the first magnetic core is provided with a first gap with a preset size in an open-loop design mode on a preset side wall, and the wire is wound on the surface of the first magnetic core to detect arc discharge current;
the second magnetic core is stacked with the first magnetic core, a second gap is designed on the side wall stacked with the preset side wall in an open-loop mode, and the second gap is at least partially communicated with the first gap;
the PCB comprises a first part and a second part, the second part is clamped in the two side walls of the second gap, and the first part is abutted against the outer surface of the side wall where the second gap is located;
the current detection chip is positioned on the upper surface or the lower surface of the second part and used for detecting direct current;
the signal processing module comprises a first processing unit and a second processing unit, wherein the first processing unit is connected with the first magnetic core and is used for processing and outputting arc discharge current detected by the first magnetic core; the second processing unit is connected with the current detection chip and used for processing and outputting the direct current detected by the current detection chip;
the surface of the wire is insulated from the outer surface of the first magnetic core.
Preferably, the first and second electrodes are formed of a metal,
a surface of the wire is insulated from an outer surface of the first magnetic core, including:
the surface of the lead is subjected to insulation treatment; and/or
The outer surface of the first magnetic core is subjected to insulation treatment.
Preferably, the first and second electrodes are formed of a metal,
the insulation treatment is a paint dipping process.
Preferably, the distance between the current detection chip and the bottom of the second gap is H/3-2H/3;
wherein H is the height of the second gap.
Preferably, the method further comprises the following steps:
the fixing component comprises a bottom plate and a fixing pin group fixed on one surface of the bottom plate, and is connected with one surface of the first part of the PCB through the other surface of the bottom plate;
wherein, the both ends of wire are connected with one of them fixed needle respectively.
Preferably, the two ends of the lead are respectively connected with one of the fixing pins in a welding manner.
In a second aspect, an embodiment of the present invention provides a sensor including any one of the above-mentioned device structures with dc and arcing current detection, further including:
the shell comprises an inner wall and an outer wall, and a gap is formed between the inner wall and the outer wall to accommodate the first magnetic core wound with the wire.
Preferably, a fixing piece is arranged on one side of the inner wall close to the first gap or the second gap,
the fixing piece is abutted to the preset side walls on two sides of the first gap or the second gap and used for fixing the first magnetic core or the second magnetic core.
Preferably, the fixing member includes a first fixing plate and a second fixing plate, and the first fixing plate and the second fixing plate respectively abut against the side walls of the two sides of the first gap or the second gap.
In a third aspect, a processing system with dc current detection and arc discharge current detection functions according to an embodiment of the present invention includes any one of the device structures described above, and further includes:
the first ADC signal acquisition module is connected with the first processing unit corresponding to the first magnetic core and used for acquiring the arc discharge current signal processed by the first processing unit;
the second ADC signal acquisition module is connected with a second processing unit corresponding to the current detection chip and used for acquiring the direct current signal processed by the second processing unit;
the first judgment module is connected with the first ADC signal acquisition module and used for judging whether the arc current acquired by the first ADC signal acquisition module meets a first preset condition or not;
the second judgment module is connected with the second ADC signal acquisition module and used for judging whether the direct current acquired by the second ADC signal acquisition module meets a second preset condition or not;
the first early warning module is connected with the first judging module and used for sending first early warning information if the arc discharge current acquired by the first ADC signal acquisition module meets a first preset condition;
and the second early warning module and the second judgment module are used for sending out second early warning information if the direct current acquired by the second ADC signal acquisition module meets a second preset condition.
The invention can achieve the following technical effects:
1. the device structure, the sensor and the system with the direct current and arc discharge current detection function overcome the defect that a device capable of detecting the direct current and the arc discharge current simultaneously does not exist in the prior art; in addition, the direct current detection chip and the arc discharge current detection chip are respectively attached to the opposite surfaces of the second part of the PCB, so that the size of the sensor with the direct current detection capability and the arc discharge current detection capability is small, and the on-board mounting is facilitated.
2. The magnetic core has low requirement on materials, adopts ferrite, has low price, ensures lower cost and improves convenient conditions for batch production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of the mechanism of a transformer in a prior art solution;
fig. 2a is a schematic diagram of a dc current detection device in a prior art solution;
FIG. 2b is a circuit diagram of the DC current detecting device in the prior art;
fig. 3 and fig. 4 are schematic diagrams of the device structure with dc and arcing current detection according to the embodiment of the present invention;
FIG. 5 is a diagram illustrating the relationship between the DC current detected by the current detecting chip and the output voltage of the device structure according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a sensor with DC and arcing current detection according to an embodiment of the present invention;
fig. 7 is a block diagram of a system with dc and arcing current detection according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
In order to solve the technical problem that a detection device which has a small volume and can simultaneously detect a direct current and an arc discharge current is absent in the prior art, an embodiment of the present invention provides a device structure with direct current and arc discharge current detection, which is shown in fig. 3 and includes:
a lead wire 31;
a first magnetic core 32, which is provided with a first gap with a preset size on a preset side wall in an open-loop design, and the wire is wound on the surface of the first magnetic core for detecting arc discharge current;
the second magnetic core 33 is stacked with the first magnetic core, a second gap is designed on the side wall stacked with the preset side wall in an open-loop mode, and the second gap is at least partially communicated with the first gap;
the PCB 34 comprises a first part 341 and a second part 342, the second part 342 is clamped in the two side walls of the second gap, and the first part is abutted against the outer surface of the side wall where the second gap is located;
a current detection chip 35 located on an upper surface or a lower surface of the second portion, for detecting a direct current;
the signal processing module comprises a first processing unit and a second processing unit, the first processing unit is connected with the first magnetic property and used for processing and outputting arc discharge current signals detected by the first magnetic core, and the second processing unit is connected with the current detection chip and used for processing and outputting direct current detected by the current detection chip;
the surface of the wire is insulated from the outer surface of the first magnetic core.
In the embodiment of the invention, the current detection chip and the magnetic core can be welded on the PCB board through tin paste by adopting an SMT process, the first processing unit can be positioned on the current detection chip and also can be positioned on the PCB board, and similarly, the second processing unit can be positioned on the PCB board and also can be positioned on the first magnetic core.
In the embodiment of the invention, the surface of the wire 31 is insulated from the surface of the first magnetic core 32, so that short circuit caused by the circuit conduction between the surface of the wire 31 and the surface of the first magnetic core 32 in the process of electrifying the wire is avoided, and the personal and property safety is effectively ensured.
In the embodiment of the present invention, the sizes of the first gap and the second gap may be set according to actual requirements, the size of the first gap is set according to the range of the arc discharge current to be sensed, and the size of the second gap is set according to the range of the dc current to be detected. Namely: the second slit may be set to have the same size as the first slit, or may be set to have different sizes, and the sizes are not necessarily limited in a size relationship.
In the device structure provided by the embodiment of the invention, in the operation process, preferably, the lead wound around the first magnetic core is connected out by being welded on the PCB so as to complete the detection of the arc discharge current.
The device structure provided by the embodiment of the invention at least has the following beneficial effects:
1. the device structure, the sensor and the system with the direct current and arc discharge current detection function overcome the defect that a device capable of detecting the direct current and the arc discharge current simultaneously does not exist in the prior art; in addition, the direct current detection chip and the arc discharge current detection chip are respectively attached to the opposite surfaces of the second part of the PCB, so that the size of the sensor with the direct current detection capability and the arc discharge current detection capability is small, and the on-board mounting is facilitated.
2. The magnetic core has low requirement on materials, adopts ferrite, has low price, ensures lower cost and improves convenient conditions for batch production.
In the embodiment of the present invention, the surface of the conductive wire 31 is insulated from the outer surface of the first magnetic core 32, and includes:
the surface of the lead 31 is subjected to insulation treatment; and/or
The outer surface of the first magnetic core 32 is subjected to insulation treatment.
In the embodiment of the present invention, in order to ensure that the surface of the conductive wire 31 is insulated from the outer surface of the first magnetic core 32, at least one of the surface of the conductive wire 31 and the outer surface of the first magnetic core 32 is insulated, and for the sake of safety, both of them may be insulated, so as to effectively avoid the occurrence of short circuit caused by the electrical connection between the conductive wire and the first magnetic core when the conductive wire is conducted.
Further, in the embodiment of the present invention, the insulation treatment may be a dipping process, that is, a dipping (painting) treatment is performed on the surface of the conductive wire 31 or the outer surface of the first magnetic core 32, so that an insulation layer is attached to the surface of the conductive wire 31 or the outer surface of the first magnetic core 32.
In the embodiment of the present invention, the distance between the current detection chip 35 and the bottom of the second gap is H/3-2H/3; wherein H is the height of the second gap.
In the embodiment of the present invention, the current detecting chip 35 is located in the middle of the vertical plane of the second slit, for example, may be located at a distance of H/3-2H/3 from the bottom, for example, may be located at a distance of H/3, H/2 or 2H/3 from the bottom of the second slit.
The device structure provided in the embodiment of the present invention may further include:
a fixing member 36 including a base plate 361 and a fixing pin group 362 fixed on one surface of the base plate 361, the other surface of the base plate 361 being connected with one surface of the first portion 341 of the PCB;
wherein, two ends of the conducting wire 31 are respectively connected with one of the fixing pins.
In the embodiment of the present invention, two ends of the wire are respectively connected to one of the fixing pins, and in the embodiment of the present invention, the fixing pin can be used as an output signal pin at the same time, as shown in the figure, the fixing pin 3621 can be used as a positive output end of the first magnetic core (arc discharge current detection magnetic core); the fixed needle 3622 can be used as an external power supply access end of the device structure provided by the invention; the fixed pin 3623 can also serve as a ground terminal for the device structure provided by the present invention; the stationary pin 3624 can simultaneously serve as the output terminal of the device structure; the fixing pin 3625 may also serve as a negative output terminal of the first magnetic core (drawn arc current detecting magnetic core).
Further, in the embodiment of the present invention, two ends of the lead are respectively connected to one of the fixing pins by welding.
The first magnetic core and the second magnetic core in the embodiment of the invention can be made of ferrite materials, so that the requirement on the materials is not high, and the problem of large volume caused by the adoption of nano materials in the prior art is effectively solved. And the ferrite material is low in price, thereby providing favorable conditions for mass production.
In the embodiment of the present invention, the apertures of the first magnetic core and the second magnetic core are preferably rectangular, and the apertures of the first magnetic core and the second magnetic core are preferably the same in shape and size.
In the embodiment of the invention, after the test lead (primary current line) passes through the apertures of the first magnetic core and the second magnetic core and is conducted, the current detection chip senses the current of the test lead and converts the current into the magnetic field, the current detection chip positioned in the second gap senses the primary current to generate the magnetic field, and the magnetic field is converted into the voltage signal by the regulating circuit and then output. And the signal is converted into a primary current signal through proportion conversion. Alternating current signals are filtered through the filter circuit, and therefore the direct current detection part of the device structure cannot induce high-frequency arc discharge signals, and direct current components are output. And the first magnetic core induces a high-frequency arc discharge signal through the magnetic ring, and the direct current signal cannot be captured by the first magnetic core.
As follows, a specific example is illustrated:
by adopting the device structure with direct current and arc discharge current detection provided by the embodiment of the invention, primary arc discharge current can be simulated between the current frequency of 5 kHz-100 kHz, and if 10mA 10K Hz alternating current is added on the basis of inducing 10A direct current (primary current), arc discharge current signals detected by the first magnetic core and direct current signals detected by the direct current detection chip are detected; if the output of the dc detection chip and the output of the device structure are detected, specifically referring to fig. 5, in fig. 5, the abscissa is the dc current detected by the current detection chip, and the ordinate is the output of the device structure with dc and arc discharge current detection, it can be seen that the dc current corresponding to 4.5V output by the device structure is 25A, and since the device structure has a bias voltage, if the bias voltage of the device structure is 2.5V, the output voltage of the device structure corresponding to the dc current 25A is 2V.
Example 2
An embodiment of the present invention further provides a sensor with dc and arcing current detection, including a device structure with dc and arcing current detection in the previous embodiment, as shown in fig. 6, further including:
the housing 37 includes an inner wall 371 and an outer wall 372, and a gap is provided between the inner wall 371 and the outer wall 372 to accommodate the first magnetic core wound with a wire.
In the embodiment of the invention, the first magnetic core wound with the conducting wire is arranged between the inner wall and the outer wall of the shell, so that the sensor with direct current and arc discharge current detection is formed, and the sensor can be fixed by a fixing piece as required to complete the direct current and arc discharge current detection at the same time.
In the embodiment of the invention, a fixing piece is arranged on one side of the inner wall close to the first gap or the second gap,
the fixing piece is abutted to the preset side walls on two sides of the first gap or the second gap and used for fixing the first magnetic core or the second magnetic core.
Further, in the embodiment of the present invention, the fixing member includes a first fixing plate and a second fixing plate, and the first fixing plate and the second fixing plate respectively abut against the side walls on both sides of the first gap or the second gap.
It is noted that the contents of the device structure with dc and arcing current detection disclosed in the above embodiment are also applicable to the embodiment of the present invention, and are not repeated herein to avoid redundancy.
The embodiment of the invention provides a sensor with direct current and arc discharge current detection
1. The sensor with the direct current and arc discharge current detection overcomes the defect that a device capable of detecting the direct current and the arc discharge current simultaneously does not exist in the prior art; in addition, the direct current detection chip and the arc discharge current detection chip are respectively attached to the opposite surfaces of the second part of the PCB, so that the size of the sensor with the direct current detection capability and the arc discharge current detection capability is small, and the on-board mounting is facilitated.
2. The first magnetic core and the second magnetic core have low requirements on materials, adopt ferrite, have low price, ensure lower cost and improve convenient conditions for batch production.
Example 3
An embodiment of the present invention further provides a system having functions of detecting a direct current and detecting an arc discharge current, as shown in fig. 7, including the device structure 70 having functions of detecting a direct current and an arc discharge current in the above embodiment, and further including:
the first ADC signal acquisition module 71 is connected to the first processing unit corresponding to the first magnetic core, and is configured to acquire the arc discharge current signal processed by the first processing unit;
the second ADC signal acquisition module 72 is connected to a second processing unit corresponding to the current detection chip, and is configured to acquire a dc current signal processed by the second processing unit;
the first judging module 73 is connected with the first ADC signal acquiring module and is configured to judge whether the arc current acquired by the first ADC signal acquiring module meets a first preset condition;
the second judging module 74 is connected to the second ADC signal acquiring module, and is configured to judge whether the dc current acquired by the second ADC signal acquiring module meets a second preset condition;
the first early warning module 75 is connected to the first judging module 83, and configured to send out first early warning information if the arcing current acquired by the first ADC signal acquisition module meets a first preset condition;
the second early warning module 76 and the second determining module 84 are configured to send out second early warning information if the direct current collected by the second ADC signal collecting module meets a second preset condition.
The system with the dc and arcing current detection function according to the embodiment of the present invention may determine whether a predetermined condition for sending out warning information is satisfied based on the dc signal and the arcing current signal detected by the device structure with the dc and arcing current detection according to the embodiment, and when the predetermined condition is satisfied, send out first warning information for the arcing current signal satisfying the first predetermined condition, and/or send out second warning information for the dc signal satisfying the second predetermined condition. The detection of the direct current and the arc discharge current can be realized simultaneously. The defect that a device capable of detecting direct current and arc discharge current simultaneously does not exist in the prior art scheme is effectively overcome.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A device structure with direct current and arc discharge current detection, comprising:
a wire;
the first magnetic core is provided with a first gap with a preset size in an open-loop design mode on a preset side wall, and the wire is wound on the surface of the first magnetic core to detect arc discharge current;
the second magnetic core is stacked with the first magnetic core, a second gap is designed on the side wall stacked with the preset side wall in an open-loop mode, and the second gap is at least partially communicated with the first gap;
the PCB comprises a first part and a second part, the second part is clamped in the two side walls of the second gap, and the first part is abutted against the outer surface of the side wall where the second gap is located;
the current detection chip is positioned on the upper surface or the lower surface of the second part and used for detecting direct current;
the signal processing module comprises a first processing unit and a second processing unit, wherein the first processing unit is connected with the first magnetic core and is used for processing and outputting arc discharge current detected by the first magnetic core; the second processing unit is connected with the current detection chip and used for processing and outputting the direct current detected by the current detection chip;
the surface of the wire is insulated from the outer surface of the first magnetic core.
2. The device structure of claim 1,
a surface of the wire is insulated from an outer surface of the first magnetic core, including:
the surface of the lead is subjected to insulation treatment; and/or
The outer surface of the first magnetic core is subjected to insulation treatment.
3. The device structure of claim 2,
the insulation treatment is a paint dipping process.
4. The device structure of claim 1, wherein a distance between the current detecting chip and the bottom of the second slit is H/3-2H/3;
wherein H is the height of the second gap.
5. The device structure of claim 1, further comprising:
the fixing assembly comprises a bottom plate and a fixing pin group fixed on one surface of the bottom plate, and the other surface of the bottom plate is connected with one surface of the first part of the PCB;
wherein, the both ends of wire are connected with one of them fixed needle respectively.
6. The device of claim 5, wherein the two ends of the wire are connected to one of the pins by soldering.
7. A sensor including the device structure with dc and arcing current detection of any one of claims 1 to 6, further comprising:
the shell comprises an inner wall and an outer wall, and a gap is formed between the inner wall and the outer wall to accommodate the first magnetic core wound with the wire.
8. The sensor of claim 7, wherein the inner wall is provided with a fixing member on a side of the first slit or the second slit,
the fixing piece is abutted to the preset side walls on two sides of the first gap or the second gap and used for fixing the first magnetic core or the second magnetic core.
9. The sensor of claim 8, wherein the fixing member includes a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate respectively abut against side walls on both sides of the first slit or the second slit.
10. A system having dc current detection and arcing current detection functions, comprising the device structure of any one of claims 1-8, and further comprising:
the first ADC signal acquisition module is connected with the first processing unit corresponding to the first magnetic core and used for acquiring the arc discharge current signal processed by the first processing unit;
the second ADC signal acquisition module is connected with a second processing unit corresponding to the current detection chip and used for acquiring the direct current signal processed by the second processing unit;
the first judgment module is connected with the first ADC signal acquisition module and used for judging whether the arc current acquired by the first ADC signal acquisition module meets a first preset condition or not;
the second judgment module is connected with the second ADC signal acquisition module and used for judging whether the direct current acquired by the second ADC signal acquisition module meets a second preset condition or not;
the first early warning module is connected with the first judging module and used for sending first early warning information if the arc discharge current acquired by the first ADC signal acquisition module meets a first preset condition;
the second early warning module is connected with the second judging module and used for sending out second early warning information if the direct current acquired by the second ADC signal acquisition module meets a second preset condition;
the processing module comprises a first processing unit and a second processing unit.
Priority Applications (1)
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| CN117269584A (en) * | 2023-11-21 | 2023-12-22 | 江苏多维科技有限公司 | Current detection module |
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