CN220730660U - Energy consumption monitoring device - Google Patents

Abstract

The utility model provides an energy consumption monitoring device which comprises a main control circuit and a peripheral function circuit, wherein the peripheral function circuit is connected with the main control circuit through an MCU communication interface and is used for main control processing and controlling the peripheral function circuit, and the peripheral function circuit comprises a key circuit, an environment parameter circuit, an electric parameter acquisition circuit, a power circuit, an LCD display circuit, an RS48 circuit, a FLash memory circuit and a GPRS module. The utility model has the beneficial effects that the power input end is improved, the common mode filter and the LC filter are added on the basis of the conventional two-stage input protection, and the input noise is further filtered. On the basis, the external electrical signals comprise an electrical parameter signal, a DI input, a DO signal output and an RS485, and the electrical isolation scheme is used, so that the connection between the signals and the device is ensured, and electrical interaction can not occur. External interference is effectively prevented from entering the device. And meanwhile, equipment damage caused by the fact that an external signal exceeds an allowable maximum value can be avoided.

Description

Energy consumption monitoring device

Technical Field

The utility model relates to the field of energy consumption monitoring, in particular to an energy consumption monitoring device.

Background

The energy consumption monitoring device is widely used for monitoring various industrial energy consumption, provides functions of data acquisition, data operation, data forwarding, safety isolation, equipment management and the like for industrial energy consumption monitoring application, and has the following problems in use:

1. the existing energy consumption monitoring device is easy to electrically interact, so that the problem that external interference enters the device is caused.

2. There is a problem in that the device is damaged due to the external signal exceeding the allowable maximum value.

3. There is a problem in that signal distortion is caused by electromagnetic interference during signal transmission.

Disclosure of Invention

The utility model overcomes the defects in the prior art and provides an energy consumption monitoring device.

The aim of the utility model is achieved by the following technical scheme.

The energy consumption monitoring device comprises a main control and peripheral function circuits, wherein the peripheral function circuits are connected with the main control through an MCU communication interface and used for main control processing and controlling the peripheral function circuits, and the peripheral function circuits comprise a key circuit, an environment parameter circuit, an electric parameter acquisition circuit, a power circuit, an LCD display circuit, an RS48 circuit, a FLash memory circuit and a GPRS module.

The environment parameter circuit comprises a DI signal input circuit, a DO signal output circuit and a PT1000 input circuit,

the DI signal input circuit is sequentially provided with a primary overvoltage protection structure and an optical coupler isolation structure, and the primary overvoltage protection structure is connected with the MCU communication interface through the optical coupler isolation structure;

a relay isolator is arranged in the DO signal output circuit;

an AD converter is provided on the PT1000 input circuit.

The electric parameter acquisition circuit comprises a transformer, an AD converter and a shielding FPC interface, and the transformer, the AD converter and the shielding FPC interface are sequentially connected.

The power supply circuit comprises a primary overvoltage protection structure, a common mode interference protector and a secondary overvoltage protection structure, and the primary overvoltage protection structure, the common mode interference protector and the secondary overvoltage protection structure are sequentially connected.

The LCD display circuit comprises an LCD driving circuit and an LCD display, and the LCD display is connected with the MCU communication interface through the LCD driving circuit.

The RS485 circuit is connected with the main control through a primary overvoltage protection structure, a secondary overvoltage protection structure, a voltage isolator and an MCU communication interface in sequence.

And the Flash storage circuit is connected with the MCU communication interface by adopting two Flash devices.

The GPRS module comprises a GPRS module, a shielding FPC wire and a SIM card module, and the GPRS module is connected with the SIM card module through the shielding FPC wire.

The beneficial effects of the utility model are as follows: the scheme improves the power input end, adds a common mode filter and an LC filter on the basis of conventional secondary input protection, and further filters input noise. On the basis, the external electrical signals comprise an electrical parameter signal, a DI input, a DO signal output and an RS485, and the electrical isolation scheme is used, so that the connection between the signals and the device is ensured, and electrical interaction can not occur. External interference is effectively prevented from entering the device. And meanwhile, equipment damage caused by the fact that an external signal exceeds an allowable maximum value can be avoided. And the reliability of the equipment is improved. The internal GPRS SIM card part and the electric parameter acquisition part are independent modules, the part modules are sensitive to the communication time sequence requirement, and the part modules are connected with the main control by adopting length-balanced shielding FPC flat cables. Signal distortion caused by electromagnetic interference in the signal transmission process can be effectively avoided. And the reliability of the equipment is improved.

Drawings

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

FIG. 2 is a front view of the present utility model;

FIG. 3 is a top plan view of the present utility model;

FIG. 4 is a schematic diagram of the components of the present utility model;

FIG. 5 is a diagram of the power circuit composition;

FIG. 6 is a diagram of the electrical parameter acquisition circuit;

FIG. 7 is a diagram of an environmental parameter circuit composition;

FIG. 8 is a key circuit diagram;

figure 9 is a diagram of the GPRS module;

FIG. 10 is a Flash memory circuit composition diagram;

FIG. 11 is a diagram of the RS485 circuit;

FIG. 12 is a diagram showing the composition of an LCD display circuit;

fig. 13 is a master composition diagram.

The reference numerals are explained as follows: 1. an energy consumption monitoring device; 2. a key circuit; 3. an electrical parameter acquisition circuit; 4. a FLASH memory circuit; 5. a master control; 6. an LCD display circuit; 7. an environmental parameter circuit; 8. an RS485 circuit; 9. a power supply circuit; 10. and a GPRS module.

Detailed Description

The technical scheme of the utility model is further described by specific examples.

Examples

1-4, 1 is a schematic structural diagram of an energy consumption monitoring device 1, and the utility model realizes local data viewing and device parameter configuration through an LCD display and key circuit 2;

the electric parameter acquisition and the environment parameter acquisition are used for acquiring external electricity utilization data and environment data;

the GPRS module 10 and the RS485 circuit 8 are used to provide wireless/wired access;

the device collects data and configuration data and adopts FLash storage to ensure that the data cannot be lost after power failure.

Further, as shown in fig. 5, since the quality of the power supplied by the power source has a great influence on the reliable operation of the entire apparatus. The power supply circuit 9 of the device is provided with common mode interference protection and primary/secondary overvoltage protection.

The common mode interference protection is used for effectively suppressing common mode noise; primary/secondary overvoltage protection is used to protect against surge. The power circuit 9 adopts sub-modules to supply power, so that the influence of external interference on the internal modules is effectively avoided, and the influence of coupling noise between the internal modules is reduced.

The common mode interference protection mode used by the device is a common mode filter, and the model is SMCM7060. The primary protection mode is that a voltage-sensitive voltage (MOV) is matched with a ceramic discharge tube (GDT), and the secondary protection mode is that a transient diode (TVS). In the scheme, the model MOV, GDT, TVS is not limited, the MOV can be 14D471K or higher, the GDT can be SMD4532 or higher, and the TVS can be SMBJ30CA or higher.

Further, as shown in fig. 6, the electric parameter acquisition circuit 3 is provided with a transformer for coping with the external electric parameter signal. The primary side high-voltage equipment and the secondary side equipment are electrically isolated through the transformer, so that the safety of the secondary equipment is ensured. In this example, transformer models ZEMCT131 and ZMPT107 are used. The electric parameter signals are transmitted to AD conversion after passing through the mutual inductor, and parameters such as current voltage, current and electric energy degree can be obtained after the AD conversion carries out parameter analysis and calculation. In order to prevent the communication interface time sequence of the integrated metering chip from being higher, the communication stability of the main control 5 and the chip is enhanced by adopting a shielded FPC flat cable. In the embodiment, an integrated metering chip RN8302 is adopted, and a 100mm shielded FPC (flexible printed circuit) flat cable is used, so that the communication stability between the main control 5 and the RN8302 is enhanced.

Further, as shown in fig. 7, the pair of environment parameter circuits 7, DI, DO and PT1000 are connected to the main control 5 through respective circuits.

The DI signal can be connected to the equipment such as external switching value, the device does not limit the type of the equipment with external switching value, and the optical coupling isolation protection is needed to be added because of the external electric signal. The optical coupling isolation has higher electrical isolation and anti-interference capability. The device does not limit the isolation mode of the optical coupler, and the existing IC can be used.

The DO signal output can be connected with equipment such as a relay, the type of the DO equipment is not limited by the device, and the relay isolation protection is required to be added due to the fact that the DO signal is an external electric signal. The relay isolation utilizes contact control signals, so that direct contact between weak and strong electric signals can be avoided, and anti-interference isolation is realized. The relay type number used in the device is not limited, and an existing IC can be used.

The PT1000 is input into the three-wire PT1000, and after AD conversion, the original data is output and converted into temperature by the master control 5. The AD conversion scheme used in the present apparatus is ICCS1237.

Further, as shown in fig. 8, the key circuit 2 is connected to the main control 5 for cooperating with the function key input during LCD display. The device does not limit the number of keys used, and can meet the actual needs.

Further, as shown in fig. 9, the GPRS module 10 is connected to the GPRS module 10 through a SIM card module and a shielded FPC interface, and the GPRS module 10 is connected to the main control 5. Because the SIM card is sensitive in time sequence, the 95mm shielded FPC flat cable is used, so that the influence of an external electromagnetic field on GPRS can be reduced. The GPRS module 10 provides network communication services and the present device is not limited to the GPRS module 10 and the communication protocol used.

Further, as shown in fig. 10, the FLASH memory circuit 4 is respectively connected with the main control 5 by two FLASH devices, and the FLASH devices use SPI-FLASH, so that the memory capacity of the device is large and the read-write speed is high. One for the device's operational data store and another for the device's configuration data store. The SPI-FLash model used by the device is not limited, and the existing IC is used.

Further, as shown in fig. 11, the RS485 circuit 8 is connected with the main control 5 after being subjected to signal conversion by a 485 voltage isolation chip after being communicated by a protection circuit, and is an external electric signal, so that electric voltage isolation and primary/secondary overvoltage protection are added. The voltage isolation can effectively inhibit high common-mode voltage; the primary/secondary overvoltage protection can protect against potential hazards such as surge impact, lightning strike and the like. The RS485 circuit 8 can remotely read the electrical parameter signals acquired by the electrical parameter acquisition circuit 3, the DI signal input and the PT1000 input in the environment parameter circuit 7, and can also control the DO signal output. The voltage isolation mode used by the device is ICTDH541S485H, and the primary/secondary overvoltage protection reference power circuit 9. The communication protocol is not limited.

Further, as shown in fig. 12, the LCD display in the LCD display circuit 6 is connected to the main control 5 after passing through the LCD control circuit, so as to display the electrical parameters collected by the electrical parameter collecting circuit 3, DI signals in the environmental parameter circuit 7, and PT1000, and the staff can intuitively understand the electricity consumption and environmental data through the LCD display. The device does not limit the model and the size of the LCD display.

Further, as shown in fig. 13, the main control 5 is composed of an MCU and an MCU power supply circuit 9. The main control 5 reads/controls peripheral function circuits through the MCU communication interface. The MUC model used in the device is NUC977DK61Y/62Y.

The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims (1)

1. An energy consumption monitoring device, characterized in that: the peripheral function circuit is connected with the main control through the MCU communication interface and is used for processing and controlling the peripheral function circuit, and the peripheral function circuit comprises a key circuit, an environment parameter circuit, an electric parameter acquisition circuit, a power circuit, an LCD display circuit, an RS485 circuit, a FLash memory circuit and a GPRS module;

the environment parameter circuit comprises a DI signal input circuit, a DO signal output circuit and a PT1000 input circuit,

the DI signal input circuit is sequentially provided with a primary overvoltage protection structure and an optical coupler isolation structure, and the primary overvoltage protection structure is connected with the MCU communication interface through the optical coupler isolation structure;

a relay isolator is arranged in the DO signal output circuit;

an AD converter is arranged on the PT1000 input circuit;

the electric parameter acquisition circuit comprises a mutual inductor, an AD converter and a shielding FPC interface, and the mutual inductor, the AD converter and the shielding FPC interface are sequentially connected;

the power supply circuit comprises a primary overvoltage protection structure, a common mode interference protector and a secondary overvoltage protection structure, and the primary overvoltage protection structure, the common mode interference protector and the secondary overvoltage protection structure are sequentially connected;

the LCD display circuit comprises an LCD driving circuit and an LCD display, and the LCD display is connected with the MCU communication interface through the LCD driving circuit;

the RS485 circuit is connected with the main control through a primary overvoltage protection structure, a secondary overvoltage protection structure, a voltage isolator and an MCU communication interface in sequence;

the FLash memory circuit is connected with the MCU communication interface by adopting two FLash devices;

the GPRS module comprises a GPRS module, a shielding FPC wire and a SIM card module, and the GPRS module is connected with the SIM card module through the shielding FPC wire.