CN219392173U

CN219392173U - Three-phase power sensor based on Ethernet

Info

Publication number: CN219392173U
Application number: CN202222905897.5U
Authority: CN
Inventors: 周镖; 吕焱
Original assignee: Zhejiang Yongtailong Electronic Co ltd
Current assignee: Zhejiang Yongtailong Electronic Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-07-21
Anticipated expiration: 2032-10-28

Abstract

The utility model provides an Ethernet-based three-phase power sensor, which solves the problems that the power sensor is easy to be interfered and the like, and comprises a main control MCU (micro control unit), wherein the main control MCU is provided with a power circuit, is connected with a three-phase independent metering module, is provided with an LED indicating circuit and a data storage circuit, and is connected with an Ethernet communication circuit and a near infrared communication circuit. The utility model has the advantages of high measurement precision, good running stability and the like.

Description

Three-phase power sensor based on Ethernet

Technical Field

The utility model belongs to the technical field of power sensor equipment, and particularly relates to an Ethernet-based three-phase power sensor.

Background

Along with the rapid development of the economy in China and the increasing of the living standard of people. The variety and the demand of various leasing industries such as industry, housing, school, market and the like on electric power measurement are more and more, the varieties and types of electric power measurement products are more and more developed by enterprises, and the research and development expenses and manpower input are also increased. The electric force sensor is a multifunctional intelligent electric force sensor supporting data acquisition, electric power metering and remote communication, and can accurately read power consumption parameters such as harmonic waves, starting current, voltage, power factor, electric quantity, temperature and the like of terminal electric equipment in real time at high speed. However, the existing power sensors lack corresponding power consumption information display structures, so that data cannot be intuitively presented to a user. In addition, the conventional power sensor lacks an independent metering module, and has poor measuring effect on places with strict power consumption requirements.

In order to solve the defects existing in the prior art, long-term exploration is performed, and various solutions are proposed. For example, chinese patent literature discloses a three-phase power sensor [201822116266.9], which includes an MCU main control chip, and the MCU main control chip is connected with a power module, a voltage and current sampling module, a wireless transmission module, and an RS485 communication module, respectively. The power consumption condition of the high-power equipment and the quality, power factors and the like of the power utilization practical power grid of the equipment can be analyzed, enterprises can be helped to improve the power quality, and the power utilization efficiency is improved; the power supply module adopts a low-power switching power supply with EMC performance to provide enough power for the MCU main control chip and the wireless transmission module; the RS485 communication module has a 4kV alternating current isolation voltage withstand function, and parameter setting or data reading can be performed on the sensor through the RS485 communication module; the wireless transmission module adopts a WIFI wireless communication module, an AP mode can be set, the sensor is connected with a PC and a mobile phone to realize the bidirectional transmission of collected data, meanwhile, a node mode can be realized, and a designated server is accessed to enable the data collected and stored by the sensor to be actively uploaded to the server.

The scheme solves the problem of electricity consumption feedback to a certain extent, but the scheme still has a plurality of defects, such as lack of an independent metering module, easiness in external interference and the like.

Disclosure of Invention

The utility model aims to solve the problems and provide the three-phase power sensor based on the Ethernet, which is reasonable in design and can effectively improve measurement accuracy and anti-interference capability.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a three-phase power sensor based on ethernet, includes master control MCU, master control MCU is equipped with power supply circuit, and master control MCU is connected with the independent measurement module of three-phase, and master control MCU is equipped with LED indicating circuit and data storage circuit, and master control MCU is connected with ethernet communication circuit and near infrared communication circuit. The independent metering modules respectively measure three-phase parameters of the power grid, are not interfered by phases, and perform data calculation and processing on the parameters measured by the metering modules through the main control MCU to obtain required power grid data, so that the power grid data has higher measurement accuracy.

In the three-phase power sensor based on the Ethernet, the power supply circuit comprises an alternating current-direct current conversion chip, the alternating current-direct current conversion chip adopts PN8413T model, the power supply circuit is provided with a voltage reduction circuit and a voltage stabilizing circuit, the voltage reduction circuit adopts SY8113I model synchronous voltage reduction DC-DC converter, and the voltage stabilizing circuit adopts 2852K33-3 model linear voltage stabilizer. The power supply circuit supplies power to the power sensor independently, and the power sensor is maintained to operate stably.

In the three-phase power sensor based on the Ethernet, the main control MCU adopts a singlechip of CH573F model, the singlechip is provided with a burning port of HEAD 4X2-1 model and a resonator of 4P-32M model, and the singlechip is connected with a photoelectric coupler of K10104DTRU model and a double-channel digital isolator of YTL224 model. The main control MCU has the characteristics of low power consumption and high performance, and can meet the basic requirements of three-phase calculation.

In one of the above-described ethernet-based three-phase power sensors, the data storage circuit includes a 24C02RP type memory chip. The data storage circuit stores the power data, so that the power data can be conveniently called at any time.

In the three-phase power sensor based on the Ethernet, the LED indication circuit comprises an LED indication lamp connected with the main control MCU. The LED indicator light indicates the working state of the sensor and the connection state with the Ethernet.

In the above three-phase power sensor based on ethernet, the ethernet communication circuit includes an ethernet control chip of model W5500, the ethernet control chip is equipped with a connector of model RJ45-12P, and the ethernet control chip is equipped with a network port transformer of model BT16B12 and a connection terminal of model RJ 1. The Ethernet communication circuit realizes the interconnection of Ethernet, and conveniently transmits the measured power grid data to a server or various terminal devices.

In the three-phase power sensor based on the Ethernet, the metering module comprises a JLMK type current transformer, and the current transformer is connected with the main control MCU and provided with an LED indicator lamp therebetween. The metering modules are mutually independent and accurately measure three-phase current data.

In the three-phase power sensor based on the Ethernet, the near infrared communication circuit comprises a photosensitive tube of the model BPD-BQBA31, and the photosensitive tube is connected with the main control MCU and is provided with an LED indicator lamp. The near infrared communication circuit is used for configuring and reading network parameters.

In the above three-phase power sensor based on ethernet, the ethernet communication circuit is connected to the network device, and the near infrared communication circuit is connected to the local computer.

In the three-phase power sensor based on the Ethernet, the main control MCU is internally provided with the shunt of 80A. The maximum metering of the main control MCU is 80A.

Compared with the prior art, the utility model has the advantages that: the three-phase independent metering modules respectively measure three-phase parameters of the power grid, and the measurement accuracy is ensured without mutual interference; the measured power grid parameters are uploaded through the Ethernet, so that the statistics and the management of the power grid parameters are convenient; the near infrared communication circuit is arranged to conveniently set and read network parameters of the Ethernet and some local parameters.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic circuit diagram of a power supply circuit of the present utility model;

FIG. 3 is a schematic circuit diagram of a master MCU of the present utility model;

FIG. 4 is a circuit schematic of the LED indicator circuit and data storage circuit of the present utility model;

FIG. 5 is a schematic circuit diagram of an Ethernet communication circuit of the utility model;

FIG. 6 is a schematic circuit diagram of a metering module of the present utility model;

FIG. 7 is a schematic circuit diagram of a near infrared communication circuit of the present utility model;

in the figure, a main control MCU1, a power supply circuit 2, a metering module 3, an LED indication circuit 4, a data storage circuit 5, an Ethernet communication circuit 6 and a near infrared communication circuit 7.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

As shown in fig. 1, the three-phase power sensor based on the ethernet comprises a main control MCU1, and the main control MCU1 performs data calculation and processing on the measured parameters. The main control MCU1 is provided with a power supply circuit 2 for supplying power to the whole power sensor. The main control MCU1 is connected with a three-phase independent metering module 3 for respectively measuring three-phase parameters of a power grid, and is free from phase-phase interference. The main control MCU1 is provided with an LED indication circuit 4 and a data storage circuit 5 for indicating the running state of the internal elements of the circuit sensor, and the data storage circuit 5 stores the acquired data for external calling or direct processing by the main control MCU 1. The main control MCU1 is connected with the Ethernet communication circuit 6 and the near infrared communication circuit 7 to realize external communication, the Ethernet communication circuit 6 mainly realizes direct connection of the main control MCU1 and the Ethernet, realizes data exchange or remote monitoring of the power sensor, and the near infrared communication circuit 7 is opposite to the near infrared reflection device and is used for adjusting network parameters and local parameters of the Ethernet.

As shown in fig. 2, the power supply circuit 2 includes an ac/DC conversion chip, the ac/DC conversion chip adopts a PN8413T model, the power supply circuit 2 is provided with a step-down circuit and a voltage stabilizing circuit, the step-down circuit adopts a synchronous step-down DC-DC converter of a SY8113I model, and the voltage stabilizing circuit adopts a linear voltage stabilizer of a 2852K33-3 model. The high-frequency transformer with EE13-17 signal is arranged between the linear voltage stabilizer and the AC/DC conversion chip to realize transformation, and the AC/DC conversion chip is also connected with an EL816 type photoelectric coupler.

As can be seen from fig. 3, the master control MCU1 adopts a singlechip of CH573F type, the singlechip is equipped with a burner of HEAD 4X2-1 type and a resonator of 4P-32M type, and the singlechip is connected with a photoelectric coupler of K10104DTRU type and a dual-channel digital isolator of YTL224 type.

As shown in fig. 4, the data storage circuit 5 includes a 24C02RP type memory chip having a storage capacity of 2Kb, and the memory chip input and output terminals are grounded.

Still further, the LED indicating circuit 4 includes an LED indicator connected to the main control MCU1, and the LED indicator indicates the power supply status and the network connection status of the main control MCU 1.

As shown in fig. 5, the ethernet communication circuit 6 includes an ethernet control chip of the W5500 model, which is equipped with a connector of the RJ45-12P model, and an ethernet control chip which is equipped with a network port transformer of the BT16B12 model and a connection terminal of the RJ1 model. When the ethernet communication circuit 6 is normally physically connected, the LED lamp it is equipped with is normally on, and when data is transmitted, the other LED lamp is on. The remote control can be carried out through the Ethernet communication, and particularly when power measurement and control are needed in places with bad environments or harm to human beings, the places are not required to be on site, so that the work can be safely carried out.

In fig. 6, the metering module 3 includes a JLMK type current transformer, which is connected with the main control MCU1 and between which an LED indicator lamp is provided. The metering module 3 has forward and reverse active power, three-phase voltage and phase-closing arrangement, wherein the power is refreshed once every 250mS, and the power is accurate to 0.1W; the voltage is refreshed once every 1000mS, and the voltage is accurate to 1V; the frequency is refreshed every 1000mS, to the nearest 0.1Hz.

As shown in fig. 7, the near infrared communication circuit 7 includes a light sensitive tube of BPD-BQBA31 type, and the light sensitive tube is connected with the main control MCU1 and provided with an LED indicator lamp therebetween.

It is obvious that the ethernet communication circuit 6 is connected to the network device and the near infrared communication circuit 7 is connected to the local computer. Real-time data exchange is realized between the Ethernet communication circuit 6 and external network equipment, and the near infrared communication circuit 7 and the local computer can read and set parameters.

Preferably, the master MCU1 has a shunt of 80A built in. The universal electric energy meter and the electric force sensor can be realized, and the calculated content comprises all electric quantity information (forward active and reactive electric quantity, reactive four-quadrant electric quantity, rate forward and reverse active and reactive electric quantity and forward and reverse active and reactive cleanable electric quantity), instantaneous parameters (voltage, current, active and reactive apparent power, power factor and frequency), required quantity (forward active required quantity, forward maximum active required quantity, reverse maximum active required quantity, forward reactive required quantity, forward maximum reactive required quantity, reverse reactive required quantity and reverse maximum reactive required quantity).

In summary, the principle of this embodiment is as follows: the three-phase independent metering module 3 is used for accurately measuring various power parameters in the power grid in real time, and the measured data are uploaded or transmitted to specific equipment or a computer through the Ethernet communication circuit 6, so that real-time monitoring and data analysis of the power grid are realized.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although the terms of the main control MCU1, the power supply circuit 2, the metering module 3, the LED indicating circuit 4, the data storage circuit 5, the ethernet communication circuit 6, the near infrared communication circuit 7, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides a three-phase power sensor based on ethernet, includes master control MCU (1), master control MCU (1) be equipped with power supply circuit (2), its characterized in that, master control MCU (1) be connected with three-phase independent metering module (3), master control MCU (1) be equipped with LED indicating circuit (4) and data storage circuit (5), master control MCU (1) be connected with ethernet communication circuit (6) and near infrared communication circuit (7).

2. The three-phase power sensor based on the ethernet as claimed in claim 1, wherein said power supply circuit (2) comprises an ac-DC conversion chip, said ac-DC conversion chip is of PN8413T type, said power supply circuit (2) is provided with a step-down circuit and a voltage stabilizing circuit, said step-down circuit is of SY8113I type and said voltage stabilizing circuit is of 2852K33-3 type and is of a synchronous step-down DC-DC converter.

3. The three-phase power sensor based on the Ethernet according to claim 1, wherein the main control MCU (1) adopts a singlechip of CH573F type, the singlechip is provided with a burning port of HEAD 4X2-1 type and a resonator of 4P-32M type, and the singlechip is connected with a photoelectric coupler of K10104DTRU type and a double-channel digital isolator of YTL224 type.

4. An ethernet based three phase power sensor according to claim 1, wherein said data storage circuit (5) comprises a 24C02RP type memory chip.

5. The three-phase power sensor based on the Ethernet according to claim 1, wherein the LED indication circuit (4) comprises an LED indication lamp connected with the main control MCU (1).

6. An ethernet based three-phase power sensor according to claim 1, wherein said ethernet communication circuit (6) comprises a W5500 model ethernet control chip equipped with an RJ45-12P model connector, said ethernet control chip being equipped with a BT16B12 model network port transformer and an RJ1 model connection terminal.

7. The three-phase power sensor based on the Ethernet according to claim 1, wherein the metering module (3) comprises a JLMK type current transformer, and the current transformer is connected with the main control MCU (1) and is provided with an LED indicator lamp.

8. The three-phase power sensor based on the Ethernet according to claim 1, wherein the near infrared communication circuit (7) comprises a photosensitive tube of BPD-BQBA31 type, and the photosensitive tube is connected with the main control MCU (1) and is provided with an LED indicator lamp.

9. An ethernet based three-phase power sensor according to claim 1, wherein the ethernet communication circuit (6) is connected to a network device, and the near infrared communication circuit (7) is connected to a local computer.

10. The three-phase power sensor based on the Ethernet as claimed in claim 1, wherein the main control MCU (1) is internally provided with a shunt of 80A.