CN211478533U - Electrical safety detection device and intelligent socket - Google Patents

Electrical safety detection device and intelligent socket Download PDF

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Publication number
CN211478533U
CN211478533U CN201921699463.6U CN201921699463U CN211478533U CN 211478533 U CN211478533 U CN 211478533U CN 201921699463 U CN201921699463 U CN 201921699463U CN 211478533 U CN211478533 U CN 211478533U
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microcontroller
current
detection
detection circuit
signal
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叶紫权
郑小平
陈金玲
任智仁
阳海珍
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Wasion Group Co Ltd
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Wasion Group Co Ltd
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Abstract

The utility model discloses an electrical safety detection device and smart jack. The utility model comprises a fault detection module and a management module; the fault detection module comprises a current detection circuit and a zero-crossing detection circuit, and the management module comprises an analog-to-digital converter, a counter and a microcontroller; the zero-crossing detection circuit is connected with the live wire and the microcontroller respectively, the current detection circuit is connected with the live wire, the microcontroller, the analog-to-digital converter and the counter respectively, and the analog-to-digital converter and the counter are connected with the microcontroller respectively. The zero-crossing detection circuit performs self-detection to obtain a low-frequency signal and a high-frequency signal, the analog-to-digital converter performs current change rate detection on the low-frequency signal, the counter performs pulse number detection on the high-frequency signal, and the microcontroller determines whether the arc has a fault according to a detection result. Wherein, through continuously collecting and analyzing the electric current characteristic in charging process, can carry out accurate detection to the fault arc in the charging line, because of the potential safety hazard that charges that fault arc leads to when having avoided the socket to charge.

Description

Electrical safety detection device and intelligent socket
Technical Field
The utility model relates to an intelligent socket technical field especially relates to an electrical safety detection device and intelligent socket.
Background
The arc is a gas ionization discharge phenomenon, and is also a plasma. The current in the arc is microscopically the result of the movement of electrons and positive ions under the influence of an electric field, wherein the movement of electrons constitutes the major part of the current. The arc is characterized by high temperature, low current and short duration. The fault arc is easy to be caused by the insulation aging and poor contact of the circuit in the circuit, and the fault arc can generate local high temperature of 2000-.
Traditional electrical protection devices, such as fuses, circuit breakers, residual current operated protectors and the like, can only detect overload, short circuit and ground fault current and protect circuits, and current charging sockets are incapable of detecting fault arcs and have potential charging safety hazards due to the fact that the electrical protection devices are only preassembled.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrical safety detection device and smart jack aims at solving among the prior art technical problem that the socket leads to the potential safety hazard of charging because of the fault electric arc when charging.
In order to achieve the above object, the present invention provides an electrical safety detection device, which comprises a fault detection module and a management module; the fault detection module comprises a current detection circuit and a zero-crossing detection circuit, and the management module comprises an analog-to-digital converter, a counter and a microcontroller; the zero-crossing detection circuit is respectively connected with the live wire and the microcontroller, the current detection circuit is respectively connected with the live wire, the microcontroller, the analog-to-digital converter and the counter, and the analog-to-digital converter and the counter are also respectively connected with the microcontroller; wherein the content of the first and second substances,
the fault detection module is used for realizing self-detection of the fault detection module through a zero-crossing detection circuit when receiving the PWM signal sent by the microcontroller;
the fault detection module is also used for carrying out zero-crossing detection on the input current signal through a zero-crossing detection circuit to obtain a zero-crossing signal and sending the zero-crossing signal to the management module;
the management module is used for determining a sampling period according to the zero-crossing signal;
the fault detection module is further configured to obtain, by the current detection circuit in the sampling period, a low-frequency signal with a frequency smaller than a first preset threshold from the current signal and send the low-frequency signal to the analog-to-digital converter, and obtain, by the current detection circuit, a high-frequency signal with a frequency not smaller than the first preset threshold from the current signal and send the high-frequency signal to the counter;
the management module is further used for detecting the current change rate of the low-frequency signal through the analog-to-digital converter so as to set a low-frequency characteristic flag bit according to the current change rate detection result through the microcontroller;
the management module is also used for detecting the pulse number of the high-frequency signal through the counter so as to enable the microcontroller to set a high-frequency characteristic zone bit according to the pulse number detection result;
the management module is further used for judging whether the electric arc has a fault or not according to the low-frequency characteristic zone bit and the high-frequency characteristic zone bit through the microcontroller.
Preferably, the current detection circuit comprises a current sampling unit, a first signal conditioning unit, a low-pass filter, an amplifier, a high-pass filter and a first comparator; the current sampling unit penetrates through a live wire, the current sampling unit is further connected with the first signal conditioning unit, the first signal conditioning unit is respectively connected with the low-pass filter and the high-pass filter, the low-pass filter is connected with the amplifier, the amplifier is connected with the analog-to-digital converter, the high-pass filter is connected with the first comparator, and the first comparator is connected with the counter.
Preferably, the current sampling unit includes a current transformer, a shunt, or a rogowski coil.
Preferably, the current detection circuit further comprises an analog switch and a second signal conditioning unit; the second signal conditioning unit is connected with a first IO port of the microcontroller and the analog switch, and the analog switch is connected with the second IO port of the microcontroller, the current sampling unit and the first signal conditioning unit respectively.
Preferably, the zero-crossing detection circuit comprises a voltage detection unit, a third signal conditioning unit and a second comparator; the voltage detection unit is connected with the live wire and the third signal conditioning unit respectively, the third signal conditioning unit is connected with the second comparator, and the second comparator is connected with a third IO port of the microcontroller.
Preferably, the power supply further comprises a non-isolated power supply module, the non-isolated power supply module comprises an AC-DC circuit and a DC-DC circuit, the AC-DC circuit is connected with the live wire, the zero wire and the DC-DC circuit respectively, and the DC-DC circuit is connected with the management module and the fault detection module respectively.
Preferably, the power consumption measuring device further comprises a metering module, wherein the metering module is connected with the first serial port of the microcontroller, the current detection circuit and the zero-crossing detection circuit respectively and is used for metering the power consumption of the current detection circuit and the power consumption of the zero-crossing detection circuit.
Preferably, still include communication module, communication module includes at least one of WIFI unit, GPRS unit and 4G unit, communication module with microcontroller's second serial ports is connected.
The utility model also provides an intelligent socket, intelligent socket includes as above electrical safety detection device.
Preferably, the test device further comprises a panel module, wherein the panel module comprises a jack, a fault reset button and a test button, and the panel module is connected with the microcontroller.
The utility model comprises a fault detection module and a management module; the fault detection module comprises a current detection circuit and a zero-crossing detection circuit, and the management module comprises an analog-to-digital converter, a counter and a microcontroller; the zero-crossing detection circuit is connected with the live wire and the microcontroller respectively, the current detection circuit is connected with the live wire, the microcontroller, the analog-to-digital converter and the counter respectively, and the analog-to-digital converter and the counter are connected with the microcontroller respectively. The zero-crossing detection circuit performs self-detection to obtain a low-frequency signal and a high-frequency signal, the analog-to-digital converter performs current change rate detection on the low-frequency signal, the counter performs pulse number detection on the high-frequency signal, and the microcontroller determines whether the arc has a fault according to a detection result. Wherein, through continuously collecting and analyzing the electric current characteristic in charging process, can carry out accurate detection to the fault arc in the charging line, because of the potential safety hazard that charges that fault arc leads to when having avoided the socket to charge.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of a first embodiment of an electrical safety inspection device according to the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the electrical safety detection device of the present invention;
fig. 3 is an application scene diagram of the electrical safety inspection device of the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an electrical safety detection device.
Referring to fig. 1, in a first embodiment, the apparatus includes a fault detection module 10 and a management module 20; the fault detection module 10 includes a current detection circuit 110 and a zero-crossing detection circuit 120, and the management module 20 includes an analog-to-digital converter (not shown), a counter (not shown), and a microcontroller (not shown); the zero-crossing detection circuit 120 is connected to the live line (i.e., L line) and the microcontroller, respectively, the current detection circuit 110 is connected to the live line L, the microcontroller, the analog-to-digital converter, and the counter, respectively, and the analog-to-digital converter and the counter are also connected to the microcontroller, respectively; the fault detection module 10 is configured to, when receiving a PWM signal sent by the microcontroller, implement self-detection of the fault detection module 10 by using the zero-crossing detection circuit 120; the fault detection module 10 is further configured to perform zero-crossing detection on the input current signal through a zero-crossing detection circuit 120, obtain a zero-crossing signal, and send the zero-crossing signal to the management module 20; the management module 20 is configured to determine a sampling period according to the zero-crossing signal; the fault detection module 10 is further configured to obtain, by the current detection circuit 110 in the sampling period, a low-frequency signal with a frequency smaller than a first preset threshold from the current signal, send the low-frequency signal to the analog-to-digital converter, and obtain, by the current signal, a high-frequency signal with a frequency not smaller than the first preset threshold, and send the high-frequency signal to the counter; the management module 20 is further configured to perform current change rate detection on the low-frequency signal through the analog-to-digital converter, so that a low-frequency feature flag is set according to a current change rate detection result through the microcontroller; the management module 20 is further configured to perform pulse number detection on the high-frequency signal through the counter, so that the microcontroller sets a high-frequency feature flag according to a pulse number detection result; the management module 20 is further configured to determine whether there is a faulty arc according to the low frequency characteristic flag and the high frequency characteristic flag through the microcontroller.
It should be noted that the fault arc can be divided into a parallel arc and a series arc according to types, and the existing fuse, circuit breaker and residual current operated protector can only play a role of protection when the parallel arc occurs at most due to their respective characteristics, while the current is generally less than the rated current when the series arc occurs, and the protection device is almost impossible to play a role of protection, so that the intelligent socket manufactured by the corresponding principle of the protection device cannot accurately detect the fault arc. The current change rate of the charging current and the high-frequency pulse number are used as judgment bases, the current characteristic quantities are continuously collected and analyzed in the charging process, and the fault arc in the charging line can be accurately detected.
It can be understood that the low-frequency signal refers to a signal with a frequency smaller than a first preset threshold value in the current signal, and the high-frequency signal refers to a signal with a frequency not smaller than the first preset threshold value in the current signal, and the first preset threshold value can be set in a user-defined manner according to different application scenarios of the socket.
In a specific implementation, a zero-crossing detection circuit 120 performs zero-crossing detection on a current signal input by a power grid to determine a power grid frequency, so as to determine a sampling period. As an embodiment, for a power grid with a frequency of 50Hz, the analog-to-digital converter samples the current with a sampling frequency not lower than 10kHz for the low-frequency path in the current detection circuit 110, and the sampling time is half cycle, i.e. 10 ms. The cut-off frequency of the high-frequency path in the current detection circuit 110 is 10kHz, the low-frequency signal is filtered out, the signal is amplified and sent to the comparator, and the number of pulses is counted by the counter. And finally, judging whether the arc has a fault or not by the microcontroller according to the current change rate and the pulse number.
The embodiment comprises a fault detection module and a management module; the fault detection module comprises a current detection circuit and a zero-crossing detection circuit, and the management module comprises an analog-to-digital converter, a counter and a microcontroller; the zero-crossing detection circuit is connected with the live wire and the microcontroller respectively, the current detection circuit is connected with the live wire, the microcontroller, the analog-to-digital converter and the counter respectively, and the analog-to-digital converter and the counter are connected with the microcontroller respectively. The zero-crossing detection circuit performs self-detection to obtain a low-frequency signal and a high-frequency signal, the analog-to-digital converter performs current change rate detection on the low-frequency signal, the counter performs pulse number detection on the high-frequency signal, and the microcontroller determines whether the arc has a fault according to a detection result. Wherein, through continuously collecting and analyzing the electric current characteristic in charging process, can carry out accurate detection to the fault arc in the charging line, because of the potential safety hazard that charges that fault arc leads to when having avoided the socket to charge.
Referring to fig. 1 and 2 together, although the components are not numbered, the connection relationship between the components can be determined accurately and unambiguously from fig. 1 and 2. The current detection circuit 110 comprises a current sampling unit, a first signal conditioning unit, a low-pass filter, an amplifier, a high-pass filter and a first comparator; the current sampling unit penetrates through a live wire, the current sampling unit is further connected with the first signal conditioning unit, the first signal conditioning unit is respectively connected with the low-pass filter and the high-pass filter, the low-pass filter is connected with the amplifier, the amplifier is connected with the analog-to-digital converter, the high-pass filter is connected with the first comparator, and the first comparator is connected with the counter.
It should be understood that the current sampling unit may be a current transformer, a current divider, a rogowski coil, and the like. In this embodiment, a current transformer with a maximum operating frequency of 200kHz is preferably used as a current sampling unit, and penetrates through a live wire to sample current and obtain a current signal.
The first signal conditioning unit is used for carrying out voltage lifting and amplification on the alternating current small signal (about +/-155 mvpeak) output by the current sampling unit, wherein the lifting voltage is preferably +1.6V, and the amplification factor is preferably 10 times.
In a particular implementation, the pressure of real-time current signal analysis on processor and memory resources is taken into account; designing a subsequent detection path into a low-frequency part and a high-frequency part; the cut-off frequency of the low-frequency filter can be set according to the frequency of a power grid in a self-defined mode, preferably 10kHz, the analog-to-digital converter preferably adopts a 12-bit successive comparison type analog-to-digital converter with higher speed, and when the cut-off frequency of the low-frequency filter is 10kHz, the sampling rate of the analog-to-digital converter is not lower than 20 kHz; the high-frequency filter correspondingly extracts signals of 10kHz and above, the signals are amplified and then compared with a threshold K1 in the first comparator, and the microcontroller counts the number of pulses. The high-frequency signal above 10kHz is processed in this way, and the frequency spectrum is not analyzed through a complex FFT (Fast Fourier Transform) link, so that the pressure of a processor is reduced.
Further, the current detection circuit 110 further includes an analog switch and a second signal conditioning unit; the second signal conditioning unit is connected with a first IO port of the microcontroller and the analog switch, and the analog switch is connected with the second IO port of the microcontroller, the current sampling unit and the first signal conditioning unit respectively.
It should be understood that the analog switch mainly performs a signal switching function in the signal link, and the signal link is turned off or on by using a switching mode of the MOS transistor. A self-checking channel is formed by the analog switch and the second signal conditioning unit, the self-checking channel is triggered by the outside (such as a test key on a socket panel), the microcontroller generates a PWM (Pulse Width modulation) signal, the signal is output to the second signal conditioning unit through the first IO port, the second signal conditioning unit converts the PWM signal into a self-checking signal, the analog switch is switched at the moment, the self-checking signal is sent into the first signal conditioning unit, and the functional effectiveness of the electrical safety detection device is checked.
Further, the zero-crossing detection circuit 120 includes a voltage detection unit, a third signal conditioning unit, and a second comparator; the voltage detection unit is connected with the live wire and the third signal conditioning unit respectively, the third signal conditioning unit is connected with the second comparator, and the second comparator is connected with a third IO port of the microcontroller.
It should be understood that, after the fault arc is generated, the current distortion is serious, and the change of the power grid frequency cannot be identified through the current data, and in order to identify the power grid frequency, the embodiment designs a zero-crossing detection circuit; the circuit can identify not only the power grid frequency as 50Hz or 60Hz, but also the change of the power grid frequency, such as the change of 49Hz-51 Hz; through the frequency, the sampling frequency of the analog-to-digital converter and the sampling duration of the current half-wave can be adjusted, and the fact that the identification unit for identifying the high-frequency characteristic and the low-frequency characteristic in the current is a complete current half-wave is guaranteed.
The voltage detection unit is used for detecting the voltage of the power grid, outputting the voltage to the third signal conditioning unit, and meanwhile, carrying out overload detection on the line to obtain an overload detection result. And the third signal conditioning unit is used for boosting the output voltage of the voltage detection unit and then sending the boosted output voltage to the second comparator.
Further, the electrical safety detection device may further include a non-isolated power supply module 30, where the non-isolated power supply module 30 is connected to the live wire, the zero wire, the management module 20, and the fault detection module 10, respectively, and supplies power to the management module 20 and the fault detection module 10 through an AC-DC rectifier circuit and a DC-DC voltage conversion circuit in sequence. Adopt non-isolated power supply scheme to get the electricity in this embodiment, compare with the isolation scheme and save the volume, efficiency is higher.
Further, the electrical safety detection device may further include a leakage detection module, and the leakage detection module is configured to perform leakage detection on the line to obtain a leakage detection result. Therefore, the microcontroller can evaluate the health status of the charging circuit according to the leakage detection result of the leakage detection module, the overload detection result of the voltage detection unit, and the high-frequency characteristic and the low-frequency characteristic of the current detection circuit 110.
Further, the electrical safety detection apparatus may further include a metering module, the metering module is connected to the first serial port UART1 of the microcontroller, the current detection circuit 110 and the zero-crossing detection circuit 120, respectively, and may adopt a dedicated power metering chip, preferably RN 8209G.
Further, the electrical safety detection device can also comprise a communication module; the communication module is connected with a second serial port UART2 of the microcontroller, and can be at least one of a Wi-Fi unit, a GPRS unit and a 4G unit, and preferably adopts a Wi-Fi unit.
According to the embodiment, through the specific module design of the electrical safety detection device, the current detection circuit is designed into the low-frequency part and the high-frequency part, the pressure of real-time current signal analysis on a processor and a memory resource is reduced, the current change rate is obtained through the analog-to-digital converter, the counter obtains the pulse number, electrical safety detection is carried out according to the two characteristics of the current change rate and the pulse number, and the detection accuracy is improved.
The utility model also provides an intelligent socket, the intelligent socket includes the electrical safety detection device as described above, the circuit structure of the electrical safety detection device of the intelligent socket can refer to the above-mentioned embodiment, and the description is omitted herein; it can be understood that, since the smart socket of this embodiment adopts the technical solution of the electrical safety detection device, the smart socket has all the above beneficial effects.
Furthermore, the intelligent socket can further comprise a panel module (not shown), the panel module comprises a conventional jack, a fault reset button and a test button, the panel module is connected with the microcontroller, when the test button is pressed down, the microcontroller generates a PWM signal, the switching analog switch starts self-checking at the moment, and therefore the electrical safety detection device can be integrated in the intelligent socket, the fault arc detection function and the electric vehicle charging socket are deeply integrated, and cost is saved.
As shown in fig. 3, fig. 3 is an application scene diagram of the electrical safety detection device, and the charging socket with the fault arc detection function is matched with the mobile phone APP and the cloud server for use, and the socket panel is pasted with the two-dimensional code ID, and scans the two-dimensional code through the mobile phone APP, so that the connection with the socket can be established, and the socket uploads the power consumption and the charging state information to the cloud end in a wireless communication mode, thereby completing the functions of fee control and settlement. The charging current monitoring parameter is transmitted to the cloud server through the wireless communication mode, model reconstruction and parameter upgrading can be carried out, and the false alarm rate and the missing report rate are optimized.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. An electrical safety detection device is characterized by comprising a fault detection module and a management module; the fault detection module comprises a current detection circuit and a zero-crossing detection circuit, and the management module comprises an analog-to-digital converter, a counter and a microcontroller; the zero-crossing detection circuit is respectively connected with the live wire and the microcontroller, the current detection circuit is respectively connected with the live wire, the microcontroller, the analog-to-digital converter and the counter, and the analog-to-digital converter and the counter are also respectively connected with the microcontroller; wherein the content of the first and second substances,
the fault detection module is used for realizing self-detection of the fault detection module through a zero-crossing detection circuit when receiving the PWM signal sent by the microcontroller;
the fault detection module is also used for carrying out zero-crossing detection on the input current signal through a zero-crossing detection circuit to obtain a zero-crossing signal and sending the zero-crossing signal to the management module;
the management module is used for determining a sampling period according to the zero-crossing signal;
the fault detection module is further configured to obtain, by the current detection circuit in the sampling period, a low-frequency signal with a frequency smaller than a first preset threshold from the current signal and send the low-frequency signal to the analog-to-digital converter, and obtain, by the current detection circuit, a high-frequency signal with a frequency not smaller than the first preset threshold from the current signal and send the high-frequency signal to the counter;
the management module is further used for detecting the current change rate of the low-frequency signal through the analog-to-digital converter so as to set a low-frequency characteristic flag bit according to the current change rate detection result through the microcontroller;
the management module is also used for detecting the pulse number of the high-frequency signal through the counter so as to set a high-frequency characteristic zone bit according to the pulse number detection result through the microcontroller;
the management module is further used for judging whether the electric arc has a fault or not according to the low-frequency characteristic zone bit and the high-frequency characteristic zone bit through the microcontroller.
2. The electrical safety detection device according to claim 1, wherein the current detection circuit comprises a current sampling unit, a first signal conditioning unit, a low pass filter, an amplifier, a high pass filter, a first comparator; the current sampling unit penetrates through a live wire, the current sampling unit is further connected with the first signal conditioning unit, the first signal conditioning unit is respectively connected with the low-pass filter and the high-pass filter, the low-pass filter is connected with the amplifier, the amplifier is connected with the analog-to-digital converter, the high-pass filter is connected with the first comparator, and the first comparator is connected with the counter.
3. The electrical safety detection device according to claim 2, wherein the current sampling unit comprises a current transformer, a shunt, or a rogowski coil.
4. The electrical safety detection device according to claim 3, wherein the current detection circuit further comprises an analog switch and a second signal conditioning unit; the second signal conditioning unit is connected with a first IO port of the microcontroller and the analog switch, and the analog switch is connected with the second IO port of the microcontroller, the current sampling unit and the first signal conditioning unit respectively.
5. The electrical safety detection device according to any one of claims 1 to 4, wherein the zero-crossing detection circuit comprises a voltage detection unit, a third signal conditioning unit and a second comparator; the voltage detection unit is connected with the live wire and the third signal conditioning unit respectively, the third signal conditioning unit is connected with the second comparator, and the second comparator is connected with a third IO port of the microcontroller.
6. The electrical safety detection device according to claim 5, further comprising a non-isolated power module including an AC-DC circuit and a DC-DC circuit, the AC-DC circuit being connected to the live line, neutral line and the DC-DC circuit, respectively, and the DC-DC circuit being connected to the management module and the fault detection module, respectively.
7. The electrical safety detection device according to claim 5, further comprising a metering module, wherein the metering module is connected to the first serial port of the microcontroller, the current detection circuit and the zero-crossing detection circuit, respectively, and is configured to meter power consumption of the current detection circuit and the zero-crossing detection circuit.
8. The electrical safety detection device according to claim 5, further comprising a communication module, wherein the communication module comprises at least one of a WIFI unit, a GPRS unit and a 4G unit, and the communication module is connected with the second serial port of the microcontroller.
9. A smart jack, characterized in that the smart jack comprises an electrical safety detection device according to any one of claims 1-8.
10. The smart jack of claim 9, further comprising a panel module including a jack, a fault reset button, and a test button, the panel module being connected to the microcontroller.
CN201921699463.6U 2019-10-11 2019-10-11 Electrical safety detection device and intelligent socket Active CN211478533U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113920694A (en) * 2021-09-24 2022-01-11 南京恒士丹电气设备有限公司 Socket intelligent detector with functions of mobile phone APP alarming and fault feedback
CN115833670A (en) * 2023-02-15 2023-03-21 中北大学 Energy acquisition device for electromagnetic power generation unit and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113920694A (en) * 2021-09-24 2022-01-11 南京恒士丹电气设备有限公司 Socket intelligent detector with functions of mobile phone APP alarming and fault feedback
CN113920694B (en) * 2021-09-24 2024-03-15 南京恒士丹电气设备有限公司 Socket intelligent inspector with mobile phone APP alarm and fault feedback functions
CN115833670A (en) * 2023-02-15 2023-03-21 中北大学 Energy acquisition device for electromagnetic power generation unit and control method

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