Fault arc monitoring circuit and smart socket

A technology for monitoring circuits and arc faults, which is applied in circuits, measuring electronics, measuring devices, etc., can solve the problems of large volume and lack of aesthetics, and achieve the effects of reducing volume, avoiding electrical fires, and enriching applications

CN110837030APending Publication Date: 2020-02-25SHENZHEN POWER SUPPLY BUREAU
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-02-25

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Abstract

The invention relates to a fault arc monitoring circuit and a smart socket. The fault arc monitoring circuit comprises a current acquisition circuit, a voltage acquisition circuit and an AD circuit; the current acquisition circuit comprises a Hall effect current sensor and an operational amplifier circuit, and the Hall effect current sensor is connected with a live wire L of 220V electric supply in series; the voltage acquisition circuit comprises a voltage division circuit and a signal biasing circuit; the AD circuit comprises an analog-to-digital conversion chip, and the output terminals ofthe current acquisition circuit and the voltage acquisition circuit are respectively connected with two channels of the analog-to-digital conversion chip; and the analog-to-digital conversion chip isconnected with a smart socket microcontroller by virtue of a single SDO mode or double SDO mode of a serial peripheral interface (SPI). The fault arc monitoring circuit provided by the invention can achieve a fault arc monitoring function and a power metering function of the smart socket, so that functions of the smart socket are powerfully expanded, and the smart socket transforms into a family electrical monitoring complex from a metering and on-off control type device.
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Description

technical field

[0001] The invention relates to the technical field of power systems, in particular to a fault arc monitoring circuit and an intelligent socket. Background technique

[0002] Nowadays, there are endless products related to smart sockets, and they focus on energy consumption statistics, on-off, and wireless communication. With the reduction of the cost of electronic components and the mature development of communication chips, smart sockets with the above multiple functions have emerged as the times require.

[0003] For now, the energy consumption statistics of smart sockets with multiple functions are generally limited to the two forms of real-time power and accumulated electric energy, and can only complete simple electrical protection functions based on simple information such as instantaneous power. Facing the electrical safety monitoring of this kind of smart socket, the sampling module without high-speed sampling capability cannot be competent for some...

Examples

Embodiment 1

[0048] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention further provides a smart socket, including the arc fault monitoring circuit described in Embodiment 1 of the present invention. For the composition of the arc fault monitoring circuit, please refer to the description in Embodiment 1 of the present invention, which will not be repeated here.

[0049] This embodiment takes a smart socket embedded in the wall as an example, which has an arc fault monitoring circuit suitable for the smart socket, a microcontroller, a Wi-Fi communication module, a relay, and a power module; After the smart socket is connected to the power-off state, it is installed on the wall and can be used after the circuit breaker is connected; its data display methods include but are not limited to web pages, personal computer programs, and mobile phone applications. Ordinary metered smart sockets usually use an external design, which is bulky and not beautiful...