CN114002505A - Charging pile grounding detection method and system - Google Patents
Charging pile grounding detection method and system Download PDFInfo
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- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The application discloses a charging pile grounding detection method and system. The method comprises the steps of carrying out grounding detection on an alternating current input line to obtain a level signal; dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording; and judging the level and the change condition of the two recorded signals, and determining whether the grounding wire is disconnected. The potential safety hazard that the charging equipment shell electrification that leads to because of the earth connection is bad among the correlation technique brought has been solved in this application, can't provide the problem of guarantee for new forms of energy electric automobile safe charging.
Description
Technical Field
The application relates to the field of circuit detection, in particular to a charging pile grounding detection method and system.
Background
Alternating current-direct current fills electric pile work in high-voltage heavy current, and the earth connection disconnection can lead to electrified on the equipment housing, and the people touches the risk that has the electric shock on the shell, so whether equipment ground connection is good crucial. The charged shell of the charging equipment caused by the bad grounding wire can bring very serious potential safety hazard, and the safety charging of the new energy electric automobile cannot be guaranteed in the prior art.
At present, the prior art on the market has the following defects:
the charged shell of the charging equipment caused by the bad grounding wire can bring very serious potential safety hazard, and the safety charging of the new energy electric automobile cannot be guaranteed in the prior art.
The problem that the charging equipment shell electrification caused by the bad grounding wire can bring serious potential safety hazards and the safe charging of a new energy electric automobile cannot be guaranteed in the related technology is solved, and an effective solution is not provided at present.
Disclosure of Invention
The application mainly aims to provide a charging pile grounding detection method to solve the problems.
In order to achieve the above object, according to an aspect of the present application, a charging pile ground fault detection method is provided.
The charging pile grounding detection method comprises the following steps:
carrying out grounding detection on an alternating current input line to obtain a level signal;
dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording;
and judging the level and the change condition of the two recorded signals, and determining whether the grounding wire is disconnected.
Further, the performing ground fault detection on the ac input line to obtain a level signal includes:
rectifying the circuit voltage to obtain a first voltage;
dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
filtering the second voltage to obtain a first level signal;
a first level signal is collected.
Further, dividing the obtained level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording, including:
taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal, and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and recording the level change of the two groups of level signals.
Further, the determining the level and the variation of the two recorded signals to determine whether the ground line is disconnected includes:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
Furthermore, the determining the level and the variation of the two recorded signals to determine whether the ground line is disconnected includes:
acquiring a live wire grounding detection signal, a zero line grounding detection signal and two continuous signal data;
recording the level changes of the obtained live wire grounding detection signal and the zero line grounding detection signal;
comparing the recorded level change based on a preset level change mode;
and judging whether the level change accords with periodicity or not based on the comparison result.
The utility model provides a fill electric pile ground fault detection system which characterized in that includes:
the grounding detection module is used for carrying out grounding detection on the alternating current input line to obtain a level signal;
the signal acquisition module is used for dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal and recording the signals;
and the signal processing module is used for judging the recorded level and change condition of the two groups of signals and confirming whether the grounding wire is disconnected.
Further, the ground fault detection module includes a charging pile ground fault detection circuit, including:
the rectifying unit comprises a rectifying bridge U1, a 2 nd pin of the rectifying bridge U1 is connected with a live wire L, the 3 rd pin of the rectifying bridge U1 and the 2 nd pin of the rectifying bridge U3 are both connected with a ground wire PE, and the 3 rd pin of the rectifying bridge U3 is connected with a zero wire N;
the rectifying unit is used for rectifying the circuit voltage to obtain a first voltage;
the voltage division unit comprises a resistor R2, one end of the resistor R2 is connected with the 4 th pin of the rectifier bridge U1, the other end of the resistor R2 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a resistor R4;
the rectifier bridge comprises a resistor R6, wherein one end of the resistor R6 is connected with the 4 th pin of the rectifier bridge U3, the other end of the resistor R6 is connected with one end of a resistor R7, and the other end of the resistor R7 is connected with one end of a resistor R8;
the voltage division unit is used for dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
the filtering unit comprises a capacitor C1, one end of the capacitor C1 is connected with the other end of the resistor R4, and the other end of the capacitor C1 is connected with the 1 st pin of the rectifier bridge U1;
the rectifier circuit comprises a capacitor C2, wherein one end of the capacitor C2 is connected with the other end of the resistor R8, and the other end of the capacitor C2 is connected with the 1 st pin of the rectifier bridge U3;
the filtering unit is used for filtering the second voltage to obtain a first level signal;
the acquisition unit comprises an optical coupler U2, a 1 st pin of the optical coupler U2 is connected with one end of the capacitor C1 and the other end of the resistor R4 respectively, a 2 nd pin of the optical coupler U2 is connected with the other end of the capacitor C1 and a 1 st pin of the rectifier bridge U1 respectively, a 3 rd pin of the optical coupler U2 is grounded, a 4 th pin of the optical coupler U2 and one end of the resistor R1 are both connected with the signal processing module, and the other end of the resistor R1 is connected with 3.3V voltage;
the circuit comprises an optical coupler U4, wherein a 1 st pin of the optical coupler U4 is connected with one end of a capacitor C2 and the other end of a resistor R8 respectively, a 2 nd pin of the optical coupler U4 is connected with the other end of a capacitor C2 and a 1 st pin of a rectifier bridge U3 respectively, a 3 rd pin of the optical coupler U4 is grounded, a 4 th pin of the optical coupler U4 and one end of a resistor R5 are both connected with a signal processing module, and the other end of the resistor R5 is connected with 3.3V voltage;
the acquisition unit is used for acquiring a first level signal.
Further, the signal obtaining module includes:
the signal classification unit is used for taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and the signal recording unit is used for recording the level change of the two groups of level signals.
Further, the signal processing module is configured to:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
An electronic device comprising a memory and a processor, the memory storing a computer program, wherein the computer program is executable in the processor to perform any of the methods above.
A storage medium storing a computer program, wherein the computer program is executable in a processor to perform any of the above methods.
In this application embodiment, carry out the rectification through the rectifier bridge, then through resistance partial pressure, capacitive filtering, then drive the opto-coupler, gather live wire ground connection detected signal, zero line ground connection detected signal, then through the processing analysis to the signal, finally reachs whether the earth connection breaks off, realized detecting the technological effect whether the earth connection breaks off, and then solved among the prior art can't solve the charging equipment shell electrification that the earth connection is bad to lead to and can bring very serious potential safety hazard, can't provide the technical problem of guarantee for new forms of energy electric automobile safety charging.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
fig. 1 is a flow chart of a charging pile ground detection method according to an embodiment of the application;
fig. 2 is a schematic diagram of a charging pile ground detection circuit according to an embodiment of the application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. 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 application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated systems, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in communication between two systems, components or parts. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It should be understood that in the description of the present invention, unless otherwise explicitly specified or limited, the term "storage medium" may be various media that can store a computer program, such as ROM, RAM, a magnetic or optical disk, or the like. The term "processor" may be a chip or a circuit having a data Processing function, such as a CPLD (Complex Programmable Logic Device), an FPGA (Field-Programmable Gate array), an MCU (Microcontroller Unit), a PLC (Programmable Logic Controller), and a CPU (Central Processing Unit). The term "electronic device" may be any device having data processing and storage functions and may generally include fixed and mobile terminals. Fixed terminals such as desktop computers and the like. Mobile terminals such as mobile phones, PADs, and mobile robots, etc. Furthermore, the technical features mentioned in the different embodiments of the invention described later can be combined with each other as long as they do not conflict with each other.
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
According to an embodiment of the present invention, as shown in fig. 1, there is provided a charging pile ground fault detection method, including the following steps:
s100, carrying out grounding detection on an alternating current input line to obtain a level signal;
s200, dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording;
and S300, judging the recorded level and the change condition of the two groups of signals, and confirming whether the grounding wire is disconnected.
In this embodiment, the performing ground detection on the ac input line to obtain a level signal includes:
s110, rectifying the circuit voltage to obtain a first voltage;
s120, dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
s130, filtering the second voltage to obtain a first level signal;
and S140, collecting a first level signal.
In this embodiment, the dividing the acquired level signal into a live line ground detection signal and a zero line ground detection signal, and recording includes:
taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal, and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and recording the level change of the two groups of level signals.
In this embodiment, the determining the level and the variation of the two recorded signals to determine whether the ground line is disconnected includes:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
In a further embodiment, the determining the recorded level and variation of the two sets of signals to determine whether the ground line is disconnected includes:
acquiring a live wire grounding detection signal, a zero line grounding detection signal and two continuous signal data;
recording the level changes of the obtained live wire grounding detection signal and the zero line grounding detection signal;
comparing the recorded level change based on a preset level change mode;
and judging whether the level change accords with periodicity or not based on the comparison result.
From the above description, it can be seen that the present invention achieves the following technical effects:
in this application embodiment, carry out the rectification through the rectifier bridge, then through resistance partial pressure, the electric capacity filtering, then drive opto-coupler, gather live wire ground connection detected signal, zero line ground connection detected signal, then through the processing analysis to the signal, finally reachs whether the earth connection breaks off, has realized detecting the technological effect whether the earth connection breaks off.
Still including an embodiment, a fill electric pile ground connection detecting system includes:
the grounding detection module is used for carrying out grounding detection on the alternating current input line to obtain a level signal;
the signal acquisition module is used for dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal and recording the signals;
and the signal processing module is used for judging the recorded level and change condition of the two groups of signals and confirming whether the grounding wire is disconnected.
In this embodiment, the ground fault detection module includes:
the rectifying unit is used for rectifying the circuit voltage to obtain a first voltage;
the voltage division unit is used for dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
the filtering unit is used for filtering the second voltage to obtain a first level signal;
and the acquisition unit is used for acquiring the first level signal.
In this embodiment, the signal obtaining module includes:
the signal classification unit is used for taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and the signal recording unit is used for recording the level change of the two groups of level signals.
In this embodiment, the signal processing module is configured to:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
The embodiment of the present invention further provides a system for detecting grounding of a charging pile, including:
the grounding detection module is used for carrying out grounding detection on the alternating current input line to obtain a level signal;
the signal acquisition module is used for dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal and recording the signals;
and the signal processing module is used for judging the recorded level and change condition of the two groups of signals and confirming whether the grounding wire is disconnected.
In this embodiment, the ground fault detection module includes a charging pile ground fault detection circuit, including:
the rectifying unit comprises a rectifying bridge U1, a 2 nd pin of the rectifying bridge U1 is connected with a live wire L, the 3 rd pin of the rectifying bridge U1 and the 2 nd pin of the rectifying bridge U3 are both connected with a ground wire PE, and the 3 rd pin of the rectifying bridge U3 is connected with a zero wire N;
the rectifying unit is used for rectifying the circuit voltage to obtain a first voltage;
the voltage division unit comprises a resistor R2, one end of the resistor R2 is connected with the 4 th pin of the rectifier bridge U1, the other end of the resistor R2 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a resistor R4;
the rectifier bridge comprises a resistor R6, wherein one end of the resistor R6 is connected with the 4 th pin of the rectifier bridge U3, the other end of the resistor R6 is connected with one end of a resistor R7, and the other end of the resistor R7 is connected with one end of a resistor R8;
the voltage division unit is used for dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
the filtering unit comprises a capacitor C1, one end of the capacitor C1 is connected with the other end of the resistor R4, and the other end of the capacitor C1 is connected with the 1 st pin of the rectifier bridge U1;
the rectifier circuit comprises a capacitor C2, wherein one end of the capacitor C2 is connected with the other end of the resistor R8, and the other end of the capacitor C2 is connected with the 1 st pin of the rectifier bridge U3;
the filtering unit is used for filtering the second voltage to obtain a first level signal;
the acquisition unit comprises an optical coupler U2, a 1 st pin of the optical coupler U2 is connected with one end of the capacitor C1 and the other end of the resistor R4 respectively, a 2 nd pin of the optical coupler U2 is connected with the other end of the capacitor C1 and a 1 st pin of the rectifier bridge U1 respectively, a 3 rd pin of the optical coupler U2 is grounded, a 4 th pin of the optical coupler U2 and one end of the resistor R1 are both connected with the signal processing module, and the other end of the resistor R1 is connected with 3.3V voltage;
the circuit comprises an optical coupler U4, wherein a 1 st pin of the optical coupler U4 is connected with one end of a capacitor C2 and the other end of a resistor R8 respectively, a 2 nd pin of the optical coupler U4 is connected with the other end of a capacitor C2 and a 1 st pin of a rectifier bridge U3 respectively, a 3 rd pin of the optical coupler U4 is grounded, a 4 th pin of the optical coupler U4 and one end of a resistor R5 are both connected with a signal processing module, and the other end of the resistor R5 is connected with 3.3V voltage;
the acquisition unit is used for acquiring a first level signal.
In this embodiment, the signal obtaining module includes:
the signal classification unit is used for taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and the signal recording unit is used for recording the level change of the two groups of level signals.
In this embodiment, the signal processing module is configured to:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
Also included is an embodiment, which is an electronic device including a memory and a processor, where the memory stores a computer program, and the computer program is used to implement the above-mentioned fair log witness storage method when executed in the processor, and the method includes:
s100, carrying out grounding detection on an alternating current input line to obtain a level signal;
s200, dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording;
and S300, judging the recorded level and the change condition of the two groups of signals, and confirming whether the grounding wire is disconnected.
The present invention further provides a readable storage medium, in which a computer program is stored, and the computer program is used for implementing the above fair log witness storage method when executed by a processor, where the method includes:
s100, carrying out grounding detection on an alternating current input line to obtain a level signal;
s200, dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording;
and S300, judging the recorded level and the change condition of the two groups of signals, and confirming whether the grounding wire is disconnected.
The readable storage medium may be a computer storage medium or a communication medium. Communication media includes any medium that facilitates transfer of a computer program from one place to another. Computer storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, a readable storage medium is coupled to the processor such that the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Additionally, the ASIC may reside in user equipment. Of course, the processor and the readable storage medium may also reside as discrete components in a communication device. The readable storage medium may be a read-only memory (ROM), a random-access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
The present invention also provides a program product comprising execution instructions stored in a readable storage medium. The at least one processor of the device may read the execution instructions from the readable storage medium, and the execution of the execution instructions by the at least one processor causes the device to implement the methods provided by the various embodiments described above.
In the above embodiments of the terminal or the server, it should be understood that the Processor may be a Central Processing Unit (CPU), other general-purpose processors, a Digital Signal Processor (DSP), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A charging pile grounding detection method is characterized by comprising the following steps:
carrying out grounding detection on an alternating current input line to obtain a level signal;
dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal, and recording;
and judging the level and the change condition of the two recorded signals, and determining whether the grounding wire is disconnected.
2. The method of claim 1, wherein the detecting the ground of the ac input line to obtain the level signal comprises:
rectifying the circuit voltage to obtain a first voltage;
dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
filtering the second voltage to obtain a first level signal;
a first level signal is collected.
3. The charging pile ground fault detection method of claim 1, wherein the dividing the acquired level signal into a live line ground fault detection signal and a zero line ground fault detection signal and recording the signals comprises:
taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal, and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and recording the level change of the two groups of level signals.
4. The method for detecting the grounding of the charging pile according to claim 1, wherein the step of judging the recorded level and the change of the two sets of signals to determine whether the grounding wire is disconnected comprises the following steps:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
5. The utility model provides a fill electric pile ground fault detection system which characterized in that includes:
the grounding detection module is used for carrying out grounding detection on the alternating current input line to obtain a level signal;
the signal acquisition module is used for dividing the acquired level signal into a live wire grounding detection signal and a zero line grounding detection signal and recording the signals;
and the signal processing module is used for judging the recorded level and change condition of the two groups of signals and confirming whether the grounding wire is disconnected.
6. The charging pile ground fault detection system of claim 5, wherein the ground fault detection module comprises:
the rectifying unit is used for rectifying the circuit voltage to obtain a first voltage;
the voltage division unit is used for dividing the first voltage according to the voltage input requirement of the circuit to obtain a second voltage;
the filtering unit is used for filtering the second voltage to obtain a first level signal;
and the acquisition unit is used for acquiring the first level signal.
7. The charging pile ground fault detection system of claim 5, wherein the signal acquisition module comprises:
the signal classification unit is used for taking the level signal passing through the live wire and the ground wire as a live wire grounding detection signal and taking the level signal passing through the zero line and the ground wire as a zero line grounding detection signal;
and the signal recording unit is used for recording the level change of the two groups of level signals.
8. The charging pile ground fault detection system of claim 5, wherein the signal processing module is configured to:
when the live wire grounding detection signal and the zero line grounding detection signal are both in a high level, judging that the grounding wire is not connected;
when the live wire grounding detection signal is at a high level, the zero line grounding detection signal is at a low level, or the live wire grounding detection signal is at a low level, the zero line grounding detection signal is at a high level, and the two signals periodically change to judge that the grounding of the grounding wire is good.
9. An electronic device comprising a memory and a processor, the memory storing a computer program, wherein the computer program is executed in the processor to perform the method of any of claims 1 to 4.
10. A storage medium storing a computer program, characterized in that the computer program is executed in a processor to implement the method of any of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111279726.XA CN114002505A (en) | 2021-10-29 | 2021-10-29 | Charging pile grounding detection method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111279726.XA CN114002505A (en) | 2021-10-29 | 2021-10-29 | Charging pile grounding detection method and system |
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| CN114002505A true CN114002505A (en) | 2022-02-01 |
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