Multi-path electric power measuring device

Abstract

The utility model provides a multi-path electric power measuring device. The multi-path electric power measuring device comprises a measuring device shell, an external voltage type current transformer, a built-in voltage transformer, an electric energy metering chip and an embedded core board, the built-in voltage transformer, the electric energy metering chip and the embedded core board are arranged in the measuring device shell, the electric energy metering chip is connected with the embedded core board through a wire, and the built-in voltage transformer is connected with the electric energy metering chip through a wire; the built-in voltage transformer is provided with a voltage sampling connection hole in the measuring device shell; the external voltage type current transformer is connected with the electric energy metering chip through a wire. The built-in voltage transformer is arranged in the measuring device shell, the external voltage type current transformer is arranged outside the measuring device shell, a user only needs to connect a primary wire to the built-in voltage transformer, then a cable penetrates through the external voltage type current transformer, the number of wires is reduced, and installation is simpler and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of power measurement technology, specifically to a multi-channel power measurement device. Background Technology

[0002] Power testing equipment refers to equipment used for testing, verification, inspection, and acceptance of power production and power grid operation. It provides reliable assurance for the safety and reliability of power operation. With social development and the progress of the times, power equipment has become an indispensable part of people's lives, and power measurement and testing instruments occupy a very important position. Moreover, power testing instruments are becoming increasingly convenient to use compared to traditional measuring instruments.

[0003] When performing power measurements, the wire to be measured needs to be connected to the wiring port on the power measuring device. Existing power measuring devices have the following drawbacks and require improvement:

[0004] 1. The current and voltage of each load circuit of the power measurement device need to be wired to the device, which makes construction complicated, installation and replacement difficult, and the labor cost of later modification is high.

[0005] 2. Most of them are single-loop measurements, which can only monitor one load, and most of them are viewed on local LCD screens, which cannot aggregate the data to a unified platform for analysis in real time.

[0006] 3. Existing power measurement devices use external current transformers to convert current into a small current before connecting it to the internal measurement device, which leads to increased cumulative error and poor accuracy of measured power parameters. Utility Model Content

[0007] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a multi-channel power measurement device.

[0008] A multi-channel power measurement device according to this utility model includes a measurement device housing, an external voltage-type current transformer, an internal voltage transformer, an energy metering chip, and an embedded core board. The internal voltage transformer, the energy metering chip, and the embedded core board are all disposed inside the measurement device housing. The energy metering chip is connected to the embedded core board via wires, and the internal voltage transformer is connected to the energy metering chip via wires. The internal voltage transformer has a voltage sampling interface on the measurement device housing. The external voltage-type current transformer is connected to the energy metering chip via wires.

[0009] Preferably, the external voltage-type current transformer and the power metering chip are configured in twelve groups, and each of the power metering chips is electrically connected to the built-in voltage transformer through a wire.

[0010] Preferably, a waterproof interface is formed on the housing of the measuring device, and the voltage-type current transformer includes an M12 connector. The voltage-type current transformer is electrically connected to the corresponding energy metering chip through the M12 connector and the waterproof interface.

[0011] Preferably, the voltage sampling interface includes an A-phase interface, a B-phase interface, a C-phase interface, and a neutral wire interface; the A-phase interface, the B-phase interface, the C-phase interface, and the neutral wire interface are all connected to the circuit under test via a fuse.

[0012] Preferably, the power metering chip is connected to the microcontroller via wires, and the microcontroller is connected to the embedded core board via a communication protocol and wires.

[0013] Preferably, the measuring device housing is provided with a power supply inside and / or the measuring device housing is provided with an interface for connecting to an external power supply.

[0014] Preferably, the housing of the measuring device is provided with an Ethernet communication port, and the conductive wire of the embedded core board is connected to an Ethernet management chip.

[0015] Preferably, the housing of the measuring device is a rectangular box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model sets up a built-in voltage transformer inside the housing of the measuring device and an external voltage-type current transformer outside the housing of the measuring device. The user only needs to connect the built-in voltage transformer once and then pass the cable through the external voltage-type current transformer, which helps to reduce the number of wires and makes the installation simpler and more convenient.

[0018] 2. This utility model, by setting up twelve external voltage-type current transformers, can simultaneously measure twelve loads and can summarize the data in real time to a unified platform for analysis, which helps to improve the accuracy of measurement. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram illustrating the circuit connection during measurement, which is the main feature of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal circuit structure of the measuring device, which is the main feature of this utility model.

[0022] Reference numerals: 1. Measuring device housing; 2. External voltage-type current transformer. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] like Figure 1 and Figure 2 As shown, a multi-channel power measurement device according to the present invention includes a measurement device housing 1, an external voltage-type current transformer 2, a built-in voltage transformer, an energy metering chip, and an embedded core board.

[0025] The built-in voltage transformer, energy metering chip, and embedded core board are all housed inside the measuring device housing 1. The energy metering chip is connected to the embedded core board via wires, and the built-in voltage transformer is connected to the energy metering chip via wires. The built-in voltage transformer has a voltage sampling interface on the measuring device housing 1.

[0026] The external voltage-type current transformer 2 is connected to the power metering chip via wires.

[0027] It should be noted that the voltage-type current transformer, built-in voltage transformer, power metering chip and embedded core board in this application are all existing devices.

[0028] Specifically, twelve sets of external voltage-type current transformers 2 and energy metering chips are configured, and each energy metering chip is electrically connected to the built-in voltage transformer via a wire. A waterproof interface is formed on the housing 1 of the measuring device. The external voltage-type current transformer 2 includes an M12 connector, and it is electrically connected to the corresponding energy metering chip via the M12 connector and the waterproof interface. The voltage sampling interface includes an A-phase interface, a B-phase interface, a C-phase interface, and a neutral wire interface; the A-phase interface, B-phase interface, C-phase interface, and neutral wire interface are all connected to the circuit under test via fuses.

[0029] Since each device can power twelve three-phase loads, the implementation scheme is consistent. Taking one load as an example, the load cable passes through an external voltage-type current transformer 2. The other end of the external voltage-type current transformer 2 is a waterproof M12 connector, which is directly inserted into the device body and tightened with screws. The device's internal program automatically identifies the current rating of the connected transformer. The voltage sampling circuit connects to the A-phase, B-phase, and C-phase interfaces of the voltage sampling interface, as well as the neutral wire interface, via a fuse. The device internally isolates the high voltage, converts it into a low-voltage signal, processes it, and finally shares it with the twelve measurement circuits. Users only need to connect the system voltage sampling cable once, while the current only needs to pass through the cable without additional wiring. This greatly simplifies the wiring and makes installation simpler and more convenient.

[0030] Furthermore, the metering chip is connected to the microcontroller via wires, and the microcontroller is connected to the embedded core board via communication protocols and wires.

[0031] In one feasible implementation: a power supply is provided inside the measuring device housing 1 and / or an interface for connecting to an external power supply is provided on the measuring device housing 1. The measuring device housing 1 is a rectangular box.

[0032] Preferably, the measuring device housing 1 is equipped with an Ethernet communication port, and the embedded core board is connected to an Ethernet management chip via conductive wires. The device functions as a network communication management unit, with four built-in Ethernet communication ports, allowing it to be used as a network switch for cascading other devices. Multiple such devices connected end-to-end can achieve a ring network function. The device can be used with a background monitoring system or independently. It can store historical data collected from twelve channels in its internal FLASH memory. If communication between the background monitoring system and the device fails and is reconnected, the device will transmit the offline data to the background monitoring system, ensuring data integrity and facilitating user viewing and analysis. The device also features Wi-Fi functionality, allowing users to wirelessly connect and then view real-time data, configuration parameters, and system upgrades via a webpage. This solves the problem of different mobile terminal systems and the incompatibility of various apps.

[0033] The technical solution of this application can simultaneously sample the power parameters of twelve three-phase loads, with the power accuracy meeting the 0.5S level. This is higher than the accuracy of existing metering instruments used in conjunction with additional current transformers.

[0034] The technical solution of this application can identify the rated current value of a customized external voltage-type current transformer without manual setting, thus avoiding errors and facilitating on-site application.

[0035] This application's technical solution incorporates network switch functionality, enabling it to integrate with a computer to form an automated, integrated, networked, and multifunctional independent monitoring and diagnostic system. It also centrally displays measurement data from all circuits, facilitating user statistics, analysis, and application.

[0036] The measuring device described in this application, as a multifunctional and highly integrated power measuring device, is widely used in energy consumption monitoring fields such as industrial automation, power supply and distribution systems, highways, and intelligent buildings.

[0037] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A multi-channel power measurement device, characterized in that, It includes the measuring device housing, external voltage-type current transformer, internal voltage transformer, energy metering chip, and embedded core board; The built-in voltage transformer, the energy metering chip, and the embedded core board are all disposed inside the housing of the measuring device. The energy metering chip is connected to the embedded core board via wires, and the built-in voltage transformer is connected to the energy metering chip via wires. The built-in voltage transformer is provided with a voltage sampling interface on the housing of the measuring device. The external voltage-type current transformer is connected to the power metering chip via wires.

2. The multi-channel power measurement device as described in claim 1, characterized in that, The external voltage-type current transformer and the power metering chip are configured in twelve groups, and each of the power metering chips is electrically connected to the built-in voltage transformer through a wire.

3. The multi-channel power measurement device as described in claim 1, characterized in that, The measuring device housing has a waterproof interface, and the external voltage-type current transformer includes an M12 connector. The external voltage-type current transformer is electrically connected to the corresponding energy metering chip through the M12 connector and the waterproof interface.

4. The multi-channel power measurement device as described in claim 1, characterized in that, The voltage sampling interface includes an A-phase interface, a B-phase interface, a C-phase interface, and a neutral wire interface; Phase A, Phase B, Phase C, and the neutral wire interface are all connected to the circuit under test via fuses.

5. The multi-channel power measurement device as described in claim 1, characterized in that, The power metering chip is connected to the microcontroller via wires, and the microcontroller is connected to the embedded core board via communication protocols and wires.

6. The multi-channel power measurement device as described in claim 1, characterized in that, The measuring device housing is equipped with a power supply inside and / or has an interface on the measuring device housing for connecting to an external power supply.

7. The multi-channel power measurement device as described in claim 1, characterized in that, The measuring device housing is equipped with an Ethernet communication port, and the embedded core board is connected to an Ethernet management chip via a conductive wire.

8. The multi-channel power measurement device as described in claim 1, characterized in that, The housing of the measuring device is a rectangular box.

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