CN212162920U

CN212162920U - Power consumption management device based on Lora radio communication

Info

Publication number: CN212162920U
Application number: CN202020424811.5U
Authority: CN
Inventors: 王蓉; 殷侠; 黄伟
Original assignee: Jiujiang Industry Education Integration Development Center
Current assignee: Jiujiang Vocational College Industry Education Integration Development Co ltd; Jiujiang Vocational College Ship And Ocean Engineering Technology Co ltd; Jiujiang Vocational and Technical College
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-12-15
Anticipated expiration: 2030-03-27

Abstract

The utility model belongs to the technical field of intelligent control, concretely relates to power consumption management device based on Lora radio communication, include: the current transformer is arranged at the outlet end of the air switch; an electromagnetic relay; the power supply device comprises an electric quantity metering chip used for calculating power consumption, a main control chip and an SPI bus, wherein the main control chip is electrically connected with the electromagnetic relay and is connected with the electric quantity metering chip through the SPI bus, real-time power calculated by the electric quantity metering chip is sent to the main control chip, and if the difference value between the real-time power value obtained in the next sampling period and the real-time power value obtained in the previous sampling period is larger than or equal to a set power threshold value, the main control chip outputs a level signal to disconnect the electromagnetic relay so as to disconnect the power supply. The utility model discloses a main control chip judges the change value of adjacent sampling period power to the real-time detection of power, and whether the high-power electrical apparatus that uses is judged to the accuracy to main control chip sends level signal and makes electromagnetic relay disconnection, and accurate rapid gives the dormitory outage, eliminates the potential safety hazard.

Description

Power consumption management device based on Lora radio communication

Technical Field

The utility model belongs to the technical field of intelligent control, concretely relates to power consumption management device based on Lora wireless communication.

Background

With the increasing development of life and modern office conditions of people, a plurality of modern office equipment appears in offices of all units, people forget to turn off electric lamps or other electric equipment in the offices when walking, so that the electric equipment works all night, and a large amount of electric energy is wasted.

As a huge social organization, the electricity utilization waste phenomenon in the campus is more serious, and the electricity utilization safety problem is always the end point of the campus electricity utilization management work. Especially in the dormitory management work, the problem of high-power electricity utilization in the student dormitory is forbidden more often, the power supply switch that does not see the dormitory among the prior art sets up in building administrator's office usually, if the power consumption electric current is too big in the dormitory will lead to power supply switch's automatic tripping operation, after the student finds the dormitory administrator knows the mistake, the dormitory administrator need follow the switch that N is many to find this dormitory and then push up the electric brake and just can accomplish the power supply, it is miscellaneous to work, can not realize the real-time supervision to the dormitory electricity utilization.

On the other hand, the current for automatically tripping the switch is that the current of the used electric equipment in the whole dormitory can cause tripping after exceeding the set threshold, the current value causing tripping cannot be accurately determined, and the tripping threshold of each dormitory cannot be unified. For example, the point equipment with power greater than 600W can still be used in the state that other electric equipment in the dormitory stops working, and the automatic tripping phenomenon cannot be caused, so that the method cannot accurately monitor whether the high-power electricity utilization condition exists in the dormitory.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the power failure back that exists among the prior art and need the manual floodgate that pushes away, whether there is the defect of high-power consumption phenomenon in the unable accurate control dormitory, provide one kind can accurately detect high-power consumer and in time give the dormitory outage, and can be automatic for the dormitory power consumption management device based on Lora wireless communication who retransmits electricity after the incident is relieved.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a power consumption management device based on Lora radio communication which characterized in that: the method comprises the following steps:

the current transformer is arranged at the outlet end of the air switch;

the electromagnetic relay is electrically connected with the outlet end of the air switch;

the electric quantity metering chip is connected with the current transformer through a transformer interface and is used for calculating the electric quantity;

and the main control chip is electrically connected with the electromagnetic relay and is connected with the electric quantity metering chip through an SPI bus, the real-time power calculated by the electric quantity metering chip is sent to the main control chip, and if the difference value between the real-time power value obtained in the next sampling period and the real-time power value obtained in the previous sampling period is larger than or equal to a set power threshold value, the main control chip outputs a level signal to disconnect the electromagnetic relay so as to disconnect the power supply circuit.

Further, still include: the server is connected with the main control chip through the Lora wireless module, and the electricity consumption information, the real-time power information and the signals of disconnecting the electromagnetic relay which are calculated by the electric quantity metering chip are sent to the server through the Lora wireless module after passing through the main control chip.

And further, the system also comprises a building management host connected with the server through a local area network, and the server sends power consumption information and real-time power information measured by a power consumption metering chip for metering the power consumption of each dormitory and signals for switching off the electromagnetic relay to the building management host.

Furthermore, the building management host is also connected with a voice alarm, and after receiving a signal for disconnecting the electromagnetic relay, the voice alarm gives an alarm to remind which dormitory uses the high-power electric appliance.

Further, the electric quantity metering chip adopts an ATT7022E model.

Further, the main control chip adopts an STM32F103RE model.

Furthermore, the main control chip is connected with an EEPROM chip for storing system operation parameters through an IIC bus, and the EEPROM chip adopts a 25LC160 model.

Further, the set power threshold is 500W.

The utility model discloses a power consumption management device based on Lora radio communication's beneficial effect is:

1. the change value of the power of the adjacent sampling period is judged through the real-time detection of the main control chip on the power, whether the used high-power electric appliance is used or not is accurately judged, and therefore the main control chip sends a level signal to disconnect the electromagnetic relay, the dormitory is accurately and rapidly powered off, and potential safety hazards are eliminated.

2. As long as total power consumption does not transship in the dormitory, air switch can not automatic tripping, only breaks off electromagnetic relay, is used high-power with the classmate of electrical apparatus after being criticized by the education, through giving main control chip can automatic control electromagnetic relay's closure, accomplishes and sends power again for the dormitory, does not need the administrator to go to seek and the propelling movement electric brake.

3. The building administrator can monitor the electricity utilization condition of the dormitory building in real time through the building management host, and the forgotten lamps or other electrical appliances in the corridor or the dormitory are turned off in time, so that the electricity utilization waste phenomenon is reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a diagram of the structure of an embodiment of the present invention;

FIG. 2 is a schematic diagram of an operation circuit of the electric quantity metering chip;

FIG. 3 is a schematic diagram of a master control chip and its interface circuitry;

fig. 4 is a circuit diagram of an electromagnetic relay drive circuit.

In the figure, the intelligent building management system comprises a current transformer 1, an electric quantity metering chip 2, an electromagnetic relay 3, a main control chip 4, an EEPROM chip 5, a Lora wireless module 6, a server 7, a building management host 8, a voice alarm 9 and a power supply.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1-4 the utility model discloses a specific embodiment of an electricity management device based on Lora wireless communication is applicable to the power consumption management in mill or the campus, for example in the campus to the power consumption control of laboratory, teaching building, street lamp and dormitory building etc..

The embodiment of the utility model provides a use dormitory building as the example.

Every dormitory all disposes an air switch and electric quantity measurement chip 2, simultaneously corridor and public health etc. also set up air switch and electric quantity measurement chip 2 alone to the dormitory is the example, at the leading-out terminal installation current transformer 1 of the air switch in every dormitory, current transformer 1 passes through the mutual-inductor interface and is connected with an electric quantity measurement chip 2, and for simple to operate, current transformer 1 can adopt block type current transformer 1. The electric quantity metering chip 2 of the ATT7022E type can calculate the electricity consumption, the real-time power and the real-time current in real time.

Air switch leading-out terminal still is connected with electromagnetic relay 3, and electromagnetic relay 3 is connected with STM32F103RE type main control chip 4 electricity simultaneously, and electric quantity measurement chip 2 is connected with main control chip 4 through crossing the SPI bus, and information such as the power consumption that electric quantity measurement chip 2 detected, real-time power consumption and real-time current transmit main control chip 4 through the SPI bus in real time. If the dormitory is suddenly and electrically connected with a high-power electric appliance, the real-time power consumption and the real-time current of two adjacent sampling periods detected by the main control chip 4 have a large sudden change, and the electric appliance with the power of more than or equal to 500W is generally considered as the high-power electric appliance in the dormitory of students. If the difference value between the real-time power value obtained in the next sampling period and the real-time power value obtained in the previous sampling period calculated by the main control chip 4 is larger than or equal to the set power threshold value, the main control chip 4 outputs a level signal to disconnect the electromagnetic relay 3, and further the power supply circuit is disconnected. In this embodiment, the set power threshold is 500W, and meanwhile, the on/off of the electromagnetic relay 3 can be controlled by monitoring the change of the current, since the domestic electricity is 220V, the electromagnetic relay 3 can be turned off when the current increment of the adjacent sampling period exceeds 2.72A. The electromagnetic relay 3 is normally closed contact, and once the main control chip 4 detects that the real-time power increment value of the adjacent sampling period exceeds 500W, the main control chip 4 outputs high level to electrify the electromagnetic relay 3, so that the electromagnetic relay 3 is disconnected, and the power of the dormitory is cut off.

The main control chip 4 is also connected with a server 7 through the Lora wireless module 6, and the power consumption information and the real-time power information calculated by the electric quantity metering chip 2 and the signal of the disconnected electromagnetic relay 3 are sent to the server 7 through the Lora wireless module 6 after passing through the main control chip 4.

In order to enable each building manager to detect the electricity utilization condition of the building in real time, the server 7 is connected with the building management host computer 8 through a local area network, and the server 7 sends electricity consumption information and real-time power information measured by the electricity quantity measuring chip 2 for measuring the electricity consumption of each dormitory and signals for disconnecting the electromagnetic relay 3 to the building management host computer 8.

In order to inform a building manager in time which dormitory uses the high-power electric appliance so as to go to the dormitory to check the condition and carry out criticizing education on students, the building management host 8 is also connected with a voice alarm 9, and after receiving a signal for disconnecting the electromagnetic relay 3, the voice alarm 9 gives an alarm to remind which dormitory to use the high-power electric appliance.

The main control chip 4 is also connected with an EEPROM chip 5 used for storing system operation parameters through an IIC bus, and the EEPROM chip 5 adopts a model of 25LC 160.

Through the utility model discloses a mode, whether can accurate monitoring have the high-power consumption condition, but the power consumption power of whole dormitory is not overloaded when using high-power electrical apparatus, air switch can not trip, only 3 disconnection messenger dormitory outage of electromagnetic relay, after the problem is relieved, the administrator only need send the order that can retransmit on building management host 8, building management host 8 sends the order of retransmitting for server 7, server 7 sends for main control chip 4 again, main control chip 4 output low level makes electromagnetic relay 3 closed, the retransmission for the dormitory has been accomplished promptly, and do not need the administrator to go special searching switch again, the phenomenon of pushing away the switch. Meanwhile, the building manager can also monitor the power utilization condition of each electric meter of the whole building in real time, and timely close the electric appliances wasting power by operating the building management host 8.

As shown in the schematic diagram of the working circuit of the electricity metering chip 2 shown in fig. 2, this part is a circuit for realizing three-phase or single-phase metering, and is realized by using the ATT7022E electricity metering chip 2, the interface P1 is an interface for connecting the current transformer 1, at most 3 transformers are supported, voltage is divided by three groups of resistors, the voltage enters a sampling chip (corresponding to V1P V1N V2P V2N V3P V3N in the diagram), and after the ATT7022E chip calculates the electricity consumption original data, the chip is connected with the main control chip 4(SPI bus) through

pins

35, 36, 37, 38, 1, 2 and 40 of the chip to transmit the data. CF1_ K CF2_ K CF3_ K CF4_ K is a calibration interface.

As shown in the schematic diagram of the main control chip 4 and the interface circuit thereof shown in fig. 3, the main control chip 4 adopts an STM32F103RET6 chip, and is connected with an ATT7022E metering sampling chip, an SP3232 serial port level conversion chip (UART connection of TTL level), a key (IO connection), and an LED lamp (IO connection), and in addition, the main chip is also connected with an EEPROM (model: 25LC160) through an SPI bus.

Fig. 4 shows a driving circuit diagram of the electromagnetic relay 3, which is directly driven by an NPN transistor. When the main control chip 4 outputs a high level, the electromagnetic relay 3 is closed to open the normally open contact, and the power circuit is further opened.

It should be understood that the above description of the specific embodiments is only for the purpose of explanation and not for the purpose of limitation. Obvious changes or variations caused by the spirit of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a power consumption management device based on Lora radio communication which characterized in that: the method comprises the following steps:

the current transformer (1) is arranged at the outlet end of the air switch;

the electromagnetic relay (3) is electrically connected with the outlet end of the air switch;

the electric quantity metering chip (2) is connected with the current transformer (1) through a transformer interface and is used for calculating the electric quantity;

the main control chip (4) is electrically connected with the electromagnetic relay (3) and is connected with the electric quantity metering chip (2) through an SPI bus, real-time power obtained by calculation of the electric quantity metering chip (2) is sent to the main control chip (4), and if the difference value between the real-time power value obtained in the next sampling period and the real-time power value obtained in the previous sampling period is larger than or equal to a set power threshold value, the main control chip (4) outputs a level signal to enable a normally closed contact of the electromagnetic relay (3) to be disconnected, so that a power supply circuit is disconnected;

the electricity management device further includes: the server (7) is connected with the main control chip (4) through the Lora wireless module (6), and the electricity consumption information and the real-time power information which are calculated by the electricity metering chip (2) and signals for disconnecting the electromagnetic relay (3) are sent to the server (7) through the Lora wireless module (6) after passing through the main control chip (4);

the electricity consumption management device also comprises a building management host (8) connected with the server (7) through a local area network, and the server (7) sends electricity consumption information and real-time power information measured by an electricity consumption metering chip (2) for metering the electricity consumption of each dormitory and signals for disconnecting the electromagnetic relay (3) to the building management host (8); building management host computer (8) still are connected with voice alarm (9), and after receiving the signal of disconnection electromagnetic relay (3), voice alarm (9) report to the police and remind which dormitory to use high-power electrical apparatus.

2. The electricity management device based on Lora wireless communication of claim 1, wherein: the electric quantity metering chip (2) adopts an ATT7022E model.

3. The electricity management device based on Lora wireless communication of claim 1, wherein: the main control chip (4) adopts an STM32F103RE model.

4. The electricity management device based on Lora wireless communication of claim 1, wherein: the main control chip (4) is also connected with an EEPROM chip (5) used for storing system operation parameters through an IIC bus, and the EEPROM chip (5) adopts a 25LC160 model.

5. The electricity management device based on Lora wireless communication of claim 1, wherein: the set power threshold is 500W.

6. The electricity management device based on Lora wireless communication of claim 1, wherein: the Lora wireless module (6) adopts a ZSL310 model.