CN214067240U

CN214067240U - Intelligent electric energy meter for fire detection

Info

Publication number: CN214067240U
Application number: CN202021361582.3U
Authority: CN
Inventors: 姚莉; 蔡方辉; 周俊
Original assignee: Guangdong Haoning Da Industrial Co ltd
Current assignee: Guangdong Haoning Da Industrial Co ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-08-27
Anticipated expiration: 2030-07-09

Abstract

The utility model discloses an intelligent electric energy meter that can be used to fire detection, including power module, outside line temperature detection module, leakage current detection module, metering module, current sampling module, voltage sampling module, display module, relay control module, communication module, storage module, button detection module and MCU, the utility model discloses to how to combine the technical characterstic of original electric energy meter, leakage current detection circuit and the line temperature detection circuit that increase on original electric energy meter basis. The leakage current detection circuit is realized by adopting a metering chip (double metering chips) of the electric energy meter, and has the functional characteristics of simple circuit, high accuracy, stability and high precision. The line temperature detection circuit is realized by adopting an external thermocouple mode and can be placed on any test point on an external line.

Description

Intelligent electric energy meter for fire detection

Technical Field

The utility model relates to an electric energy meter technical field specifically is an intelligent electric energy meter that can be used to fire detection.

Background

In recent years, as casualties caused by fire disasters are increased day by day, property loss is huge, and the national fire situation is very severe. The analysis by collecting fire data in recent years finds that the electrical fire is the first big cause of fire. The conditions of line aging, improper electricity utilization, overload short circuit and the like can cause electrical fire, and because the existing electrical fire equipment and an electric meter are two separate independent equipment, various problems of management efficiency and quality exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intelligent ammeter that can be used to fire detection to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an intelligent ammeter that can be used to fire detection, includes power module, outside line temperature detection module, leakage current detection module, metering module, current sampling module, voltage sampling module, display module, relay control module, communication module, storage module, button detection module and MCU, MCU connects respectively through the IO interface on it and connects power module, outside line temperature detection module, leakage current detection module, metering module, display module, relay control module, communication module, storage module, button detection module respectively, and metering module still connects current sampling module, voltage sampling module respectively.

As a further technical solution of the present invention: the leakage current detection circuit is realized by adopting a sharp-energy micro RN8302B chip.

As a further technical solution of the present invention: the communication module adopts a 485 communication line.

As a further technical solution of the present invention: the current adoption module adopts a current transformer, and the voltage adoption module adopts a voltage division type voltage sampling circuit.

As a further technical solution of the present invention: the MCU is a singlechip.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses to how to combine the technical characterstic of original electric energy meter, the leakage current detection circuitry and the line temperature detection circuitry that increase on original electric energy meter basis. The leakage current detection circuit is realized by adopting a metering chip (double metering chips) of the electric energy meter, and has the functional characteristics of simple circuit, high accuracy, stability and high precision. The line temperature detection circuit is realized by adopting an external thermocouple mode and can be placed on any test point on an external line.

Drawings

Fig. 1 is a block diagram of the present invention.

Fig. 2 is a circuit diagram of a leakage current detection module.

Fig. 3 is a schematic diagram of an external line temperature detection module.

Fig. 4 is a wiring diagram of the utility model.

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 work belong to the protection scope of the present invention.

Referring to fig. 1-4, in embodiment 1, an intelligent electric energy meter for fire detection includes a power module, an external line temperature detection module, a leakage current detection module, a metering module, a current sampling module, a voltage sampling module, a display module, a relay control module, a communication module, a storage module, a key detection module and an MCU, where the MCU is connected to the power module, the external line temperature detection module, the leakage current detection module, the metering module, the display module, the relay control module, the communication module, the storage module and the key detection module through I/O interfaces thereof, and the metering module is further connected to the current sampling module and the voltage sampling module.

The communication module adopts a 485 communication line. The current adoption module adopts a current transformer, and the voltage adoption module adopts a voltage division type voltage sampling circuit. The MCU is a singlechip. The power module supplies power for each module, outside line temperature detection module gathers the temperature signal of external circuit and transmits for MCU, leak current detection circuit gathers the leakage current signal and transmits for MCU, MCU carries out audio-visual demonstration through display module after the signal processing of receiving, can also come peripheral hardware such as control alarm through relay control module, can also carry out alarm signal's transmission through communication module simultaneously, and can also record the testing result in storage module.

Example 2: based on embodiment 1, the leakage current detection circuit is implemented by using a sharp-energy micro RN8302B chip. The leakage current detection of 3 paths can be supported, the open circuit and the short circuit of the external leakage current transformer can be accurately tested, the MCU queries the condition of the RN8302B chip register in real time, so that whether a leakage current event occurs outside is judged, the query period can be flexibly set, and the detection threshold can be flexibly set in the MCU. The current adoption module and the voltage adoption module respectively collect voltage and current signals and transmit the signals to the MCU.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an intelligent ammeter that can be used to fire detection, includes power module, outside line temperature detection module, leakage current detection module, metering module, current sampling module, voltage sampling module, display module, relay control module, communication module, storage module, button detection module and MCU, its characterized in that, MCU connects respectively through the IO interface on it and connects power module, outside line temperature detection module, leakage current detection module, metering module, display module, relay control module, communication module, storage module, button detection module, metering module still connects current sampling module, voltage sampling module respectively.

2. The intelligent electric energy meter for fire detection according to claim 1, wherein the leakage current detection circuit is implemented by using a sharp micro RN8302B chip.

3. The intelligent electric energy meter for fire detection according to claim 1, wherein the communication module adopts a 485 communication line.

4. The intelligent electric energy meter for fire detection according to claim 1, wherein the current sampling module adopts a current transformer, and the voltage sampling module adopts a voltage division type voltage sampling circuit.

5. The intelligent electric energy meter for fire detection according to claim 1, wherein the MCU is a single chip microcomputer.