CN213181966U - Grounding detection circuit, electrical equipment and socket device - Google Patents
Grounding detection circuit, electrical equipment and socket device Download PDFInfo
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- CN213181966U CN213181966U CN202021866379.1U CN202021866379U CN213181966U CN 213181966 U CN213181966 U CN 213181966U CN 202021866379 U CN202021866379 U CN 202021866379U CN 213181966 U CN213181966 U CN 213181966U
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Abstract
The utility model discloses a ground connection detection circuit, electrical equipment and socket device, the ground connection detection circuit includes signal input interface, blocking module, filtering module, shaping module, processing module and alarm module; the signal input interface is connected with the input end of the blocking module, the output end of the blocking module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the shaping module, the output end of the shaping module is connected with the input end of the processing module, and the output end of the processing module is connected with the alarm module. According to the technical scheme, a signal input interface is used for obtaining a mains supply alternating current signal of a grounding connection line in electrical equipment, a blocking module, a filtering module and a shaping module are used for processing the mains supply alternating current signal to obtain a rectangular wave signal, a processing module judges whether the grounding connection line in the electrical equipment is reliably grounded according to the received rectangular wave signal, and an alarm prompt signal is output through an alarm module.
Description
Technical Field
The utility model relates to an electronic circuit technical field, more specifically say and relate to ground connection detection circuitry, applied this ground connection detection circuitry's electrical equipment and applied this ground connection detection circuitry's socket arrangement that relates to.
Background
At present, a plurality of electrical equipment are generally provided with a ground wire, so that the connection function of an outer shell of the electrical equipment and a grounding end is realized, and the situations of electric leakage, electric shock and the like in the operation process of the electrical equipment are effectively prevented.
Although the existing electrical equipment is provided with the ground wire, the existing electrical equipment is not provided with a corresponding ground wire detection device, so that a user cannot know whether the actual grounding of the electrical equipment is reliable or not, namely, the electrical equipment is not provided with the ground wire detection device in the prior art, so that the reliability of the electrical equipment is poor, and once the ground wire of the electrical equipment is not reliably grounded, the user is easily injured.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a ground connection detection circuitry, applied this ground connection detection circuitry's electrical equipment and applied this ground connection detection circuitry's socket device to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.
The technical scheme adopted for solving the technical problems is as follows:
a ground detection circuit, comprising:
the signal input interface is used for being connected with a grounding connecting line of electrical equipment so as to obtain a commercial power alternating current signal;
the direct current blocking module is used for blocking direct current components in the commercial power alternating current signal to obtain a first alternating current signal;
the filtering module is used for filtering clutter signals except for power frequency in the first alternating current signal to obtain a second alternating current signal;
the shaping module is used for shaping the second alternating current signal to obtain a rectangular wave signal of power frequency;
the processing module is used for receiving and identifying the rectangular wave signal;
and an alarm module;
the signal input interface is connected with the input end of the blocking module, the output end of the blocking module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the shaping module, the output end of the shaping module is connected with the input end of the processing module, and the output end of the processing module is connected with the alarm module.
As a further improvement of the above technical solution, the technical solution further includes a relay for controlling the electrical equipment to be electrically connected to the mains input terminal, and the output terminal of the processing module is connected to the relay.
As a further improvement of the above technical solution, the shaping module includes a schmitt trigger, an output end of the filtering module is connected to an input end of the schmitt trigger, and an output end of the schmitt trigger is connected to an input end of the processing module.
As a further improvement of the above technical solution, the dc blocking module includes a capacitor C1, and the signal input interface is connected to the input terminal of the filtering module through the capacitor C1.
As a further improvement of the above technical solution, the filtering module includes a capacitor C2, a resistor R1, and a resistor R2, an output end of the dc blocking module is grounded sequentially through the capacitor C2, the resistor R1, and the resistor R2, and a connection point between the resistor R1 and the resistor R2 is connected to an input end of the shaping module.
As a further improvement of the above technical solution, the capacitor C1 and the capacitor C2 are the same capacitor.
The utility model also discloses an electrical equipment, including the plug line and above ground connection detection circuitry, the plug line includes the ground connection line, the ground connection line with the signal input interface is connected.
The utility model also discloses a socket device, including be arranged in the metal contact that is connected with the ground connection line in electrical equipment's the plug line and above ground connection detection circuitry, the metal contact with the signal input interface is connected.
The utility model has the advantages that: according to the technical scheme, a signal input interface is used for obtaining a mains supply alternating current signal of a grounding connection line in electrical equipment, a blocking module, a filtering module and a shaping module are used for processing the mains supply alternating current signal to obtain a rectangular wave signal, a processing module judges whether the grounding connection line in the electrical equipment is reliably grounded or not according to the received rectangular wave signal, and when the processing module judges that the grounding connection line in the electrical equipment is not reliably grounded, an alarm prompt signal is output through an alarm module.
Drawings
The present invention will be further explained with reference to the drawings and examples;
fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, the present application discloses a ground detection circuit, a first embodiment of which includes:
the signal input interface is used for being connected with a grounding connecting line of electrical equipment so as to obtain a commercial power alternating current signal;
the direct current blocking module is used for blocking direct current components in the commercial power alternating current signal to obtain a first alternating current signal;
the filtering module is used for filtering clutter signals except for power frequency in the first alternating current signal to obtain a second alternating current signal;
the shaping module is used for shaping the second alternating current signal to obtain a rectangular wave signal of power frequency;
the processing module is used for receiving and identifying the rectangular wave signal;
and an alarm module;
the signal input interface is connected with the input end of the blocking module, the output end of the blocking module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the shaping module, the output end of the shaping module is connected with the input end of the processing module, and the output end of the processing module is connected with the alarm module.
Specifically, according to practical application, the ground detection circuit described in this embodiment may be specifically disposed inside the electrical equipment, or may be disposed inside the socket device, where if the ground detection circuit is disposed inside the electrical equipment, the signal input interface needs to be connected to a ground connection line of the electrical equipment, and if the ground detection circuit is disposed inside the socket device, the signal input interface needs to be connected to a metal contact in the socket device, and the metal contact is used to be connected to a ground connection line in a plug connection line of the electrical equipment. In this embodiment, after receiving a commercial power ac signal transmitted by a ground connection line in an electrical apparatus through the signal input interface, first isolating a dc component in the commercial power ac signal by using the blocking module, obtaining a first ac signal whose amplitude is greatly reduced compared with the commercial power ac signal, then filtering clutter signals other than power frequency in the first ac signal by using the filtering module, obtaining a second ac signal, and finally processing the second ac signal by using the shaping module, obtaining a rectangular wave signal, wherein the processing module determines whether the ground connection line in the plug connection line of the electrical apparatus is reliably grounded according to the amplitude and frequency of the input rectangular wave signal, and outputs an alarm prompt signal through the alarm module if the processing module determines that the ground connection line in the plug connection line of the electrical apparatus is not reliably grounded, the alarm module may be a buzzer and/or an alarm light.
As a preferred embodiment, the present embodiment further includes a relay for controlling electrical equipment to be electrically connected to the mains input terminal, and the output terminal of the processing module is connected to the relay. If the processing module determines that the grounding connection line in the plug connection line of the electrical equipment is not reliably grounded, it is proved that the user cannot know in time when the electrical equipment has a leakage condition in the operation process, so that the probability of the occurrence of the contact of the user is very high.
Further, in a preferred implementation manner, in this embodiment, the shaping module includes a schmitt trigger, an output end of the filtering module is connected to an input end of the schmitt trigger, and an output end of the schmitt trigger is connected to an input end of the processing module. In this embodiment, the schmitt trigger is specifically used to shape the second ac signal, so as to obtain the rectangular wave signal, and the anti-interference performance during the shaping process can be ensured.
Further, in a preferred embodiment, in this embodiment, the dc blocking module includes a capacitor C1, the signal input interface is connected to the input end of the filtering module through the capacitor C1, the filtering module includes a capacitor C2, a resistor R1, and a resistor R2, the output end of the dc blocking module sequentially passes through the capacitor C2, the resistor R1, and the resistor R2 and is grounded, a connection point between the resistor R1 and the resistor R2 is connected to the input end of the shaping module, where the capacitor C1 and the capacitor C2 may be the same capacitor.
The application also discloses an electrical device, and a first embodiment of the electrical device comprises a plug connecting wire and the first embodiment of the grounding detection circuit, wherein the plug connecting wire comprises a grounding connecting wire, and the grounding connecting wire is connected with the signal input interface.
The application also discloses a socket device, its first embodiment, including be arranged in with electrical equipment's plug line ground connection line be connected metal contact and above the first embodiment of ground connection detection circuitry, metal contact with signal input interface is connected.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (8)
1. A ground detection circuit, characterized by: the method comprises the following steps:
the signal input interface is used for being connected with a grounding connecting line of electrical equipment so as to obtain a commercial power alternating current signal;
the direct current blocking module is used for blocking direct current components in the commercial power alternating current signal to obtain a first alternating current signal;
the filtering module is used for filtering clutter signals except for power frequency in the first alternating current signal to obtain a second alternating current signal;
the shaping module is used for shaping the second alternating current signal to obtain a rectangular wave signal of power frequency;
the processing module is used for receiving and identifying the rectangular wave signal;
and an alarm module;
the signal input interface is connected with the input end of the blocking module, the output end of the blocking module is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the shaping module, the output end of the shaping module is connected with the input end of the processing module, and the output end of the processing module is connected with the alarm module.
2. The ground detection circuit of claim 1, wherein: the grounding detection circuit further comprises a relay for controlling the electrical equipment to be connected with the mains supply input end in an electrified mode, and the output end of the processing module is connected with the relay.
3. The ground detection circuit according to claim 1 or 2, characterized in that: the shaping module comprises a Schmitt trigger, the output end of the filtering module is connected with the input end of the Schmitt trigger, and the output end of the Schmitt trigger is connected with the input end of the processing module.
4. The ground detection circuit according to claim 1 or 2, characterized in that: the DC blocking module comprises a capacitor C1, and the signal input interface is connected with the input end of the filtering module through the capacitor C1.
5. The ground detection circuit of claim 4, wherein: the filtering module comprises a capacitor C2, a resistor R1 and a resistor R2, the output end of the blocking module is grounded sequentially through the capacitor C2, the resistor R1 and the resistor R2, and a connecting point between the resistor R1 and the resistor R2 is connected with the input end of the shaping module.
6. The ground detection circuit of claim 5, wherein: the capacitor C1 and the capacitor C2 are the same capacitor.
7. Electrical equipment, its characterized in that: the ground detection circuit of any one of claims 1 to 6 and a plug connection, the plug connection comprising a ground connection, the ground connection being connected to the signal input interface.
8. A receptacle device, characterized in that: the grounding detection circuit comprises a metal contact piece and a grounding detection circuit, wherein the metal contact piece is used for being connected with a grounding connection line in a plug connection line of electrical equipment, and the grounding detection circuit is used for detecting the grounding of any one of claims 1 to 6, and the metal contact piece is connected with the signal input interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866379.1U CN213181966U (en) | 2020-08-31 | 2020-08-31 | Grounding detection circuit, electrical equipment and socket device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866379.1U CN213181966U (en) | 2020-08-31 | 2020-08-31 | Grounding detection circuit, electrical equipment and socket device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213181966U true CN213181966U (en) | 2021-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021866379.1U Active CN213181966U (en) | 2020-08-31 | 2020-08-31 | Grounding detection circuit, electrical equipment and socket device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213181966U (en) |
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2020
- 2020-08-31 CN CN202021866379.1U patent/CN213181966U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211027 Address after: 528000 No. 3, Keji Road, Songgang Songxia Industrial Park, Shishan town, Nanhai District, Foshan City, Guangdong Province (residence declaration) Patentee after: Foshan Langdu intelligent household products Technology Co.,Ltd. Address before: 528000 Songgang Songxia Industrial Park, Shishan town, Foshan City, Guangdong Province (office building) (address application) Patentee before: FOSHAN KIT TECHNOLOGY CO., Pty Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220301 Address after: 528000 No. 5, Keji East Road, Songgang Songxia Industrial Park, Shishan town, Nanhai District, Foshan City, Guangdong Province (residence declaration) Patentee after: FOSHAN KIT TECHNOLOGY CO., Pty Ltd. Address before: 528000 No. 3, Keji Road, Songgang Songxia Industrial Park, Shishan town, Nanhai District, Foshan City, Guangdong Province (residence declaration) Patentee before: Foshan Langdu intelligent household products Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |