CN204103606U - A kind of two-way interaction ordered electric inquiry system - Google Patents

Abstract

The utility model discloses a two-way interactive orderly electricity consumption query system, which is characterized in that it comprises: an intelligent query device, a transponder, an intelligent electric energy meter and a main station information broadcast device; Send to the transponder; the transponder obtains the meter data of the corresponding smart energy meter through the RS485 bus according to the user's request instruction; and feeds the meter data back to the smart queryer for display; the transponder is also used to receive and store the master station information broadcast device The power consumption information of the power grid is sent, and the power consumption information of the power grid is broadcast to the smart queryer in the idle time. The utility model can achieve the purposes of saving electricity, improving the efficiency of the power grid, and cutting peaks and filling valleys of the power grid.

Description

A two-way interactive orderly electricity consumption inquiry system

technical field

The utility model belongs to the technical field of data terminals, and more specifically relates to a two-way interactive power consumption information query system.

Background technique

With the continuous development of China's economy, the proportion of electric energy in people's life is getting higher and higher. How to use electricity in an orderly manner and save electricity is a problem that both power users and power supply companies must face. For this reason, power supply The company has established an electricity consumption information collection system, which can understand the current electricity consumption information from the grid level, and improve the accuracy and timeliness of electricity settlement. However, the electricity consumption information collection system does not connect with the user's electricity consumption habits, and cannot effectively guide the user's personal electricity consumption habits, resulting in waste of electricity consumption and low efficiency of the power grid.

Utility model content

The utility model provides a two-way interactive and orderly electricity consumption inquiry system aiming at the shortcomings of the above existing technologies, in order to achieve the goals of saving electricity, improving the efficiency of the power grid, and cutting peaks and filling valleys of the power grid.

In order to achieve the above object, the utility model adopts the following technical solutions:

The structural features of a two-way interactive and orderly electricity consumption query system of the utility model include: an intelligent query device, a transponder, an intelligent electric energy meter and a main station information broadcasting device;

The intelligent queryer is used to collect user request instructions and send them to the transponder through the power line carrier; the transponder obtains the electric meter data of the corresponding smart electric energy meter through the RS485 bus according to the user request instruction; and the electric meter data Feedback to the smart queryer for display;

The transponder is also used to receive and store the power consumption information of the grid sent by the information broadcasting device of the master station, and send the power consumption information of the grid to the intelligent queryer in idle time.

The features of the two-way interactive orderly electricity consumption query system described in the utility model also lie in:

The composition of described intelligent inquiry device comprises carrier communication module, processing unit, storage unit, display module and button module;

The processing unit obtains the corresponding electric meter parameters from the memory according to the user request command collected by the key module to form an electric meter reading command, and the electric meter reading command is sent to the electric meter through the TX pin of the processing unit. The carrier communication module performs modulation; the carrier communication module transmits the modulated meter reading command to the transponder through the power line carrier channel after being processed by the coupling filter circuit;

The carrier communication module receives the ammeter data fed back by the transponder and performs demodulation processing after passing through the coupling filter circuit to obtain the ammeter information, and the ammeter information is sent to the processing unit through the RX pin of the processing unit; The processing unit sends the electricity meter information to the storage unit for updating the current data of the electricity meter, and reads the corresponding electricity meter data from the storage unit and sends it to the display unit for display.

The composition of the transponder includes: a main control board, a display board and a carrier modulation and demodulation circuit composed of a main control circuit, an interface circuit and a carrier coupling circuit;

The carrier coupling circuit obtains the user request instruction from the interface circuit and sends it to the carrier modulation and demodulation circuit after coupling and filtering processing for demodulating the meter reading request signal, and the meter reading request signal is sent to the said meter reading request signal through the Uart serial port The main control circuit; the main control circuit identifies whether the request signal belongs to the connected smart energy meter, if so, the request signal is sent to the RS485 bus through the Tx pin of the Uart2 serial port and transmitted to the corresponding smart energy meter The meter is used to obtain the meter data;

The Rx pin of the Uart3 serial port of the main control circuit receives the feedback ammeter data and sends it to the carrier modulation and demodulation circuit through the Tx pin of the Uart2 serial port for modulation, then couples to the power line carrier channel for transmission to the smart queryer.

The composition of the transponder also includes: a GPRS module;

The GPRS module sends the power consumption information short message sent by the master station information broadcast device through the GPRS channel to the main control circuit through the RX pin; the main control circuit transmits the power consumption information short message through the Uart The serial port is sent to the carrier channel and received by the intelligent queryer.

The display board includes an infrared port circuit;

The infrared port circuit receives the infrared signal sent by the smart energy meter and obtains the query parameters after demodulation, and the main control circuit receives the query parameters through the Rx pin of the Uart0 serial port, and takes out the corresponding parameters from the memory through The Tx pin of the Uart0 serial port is sent to the smart energy meter.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The utility model can change the communication protocol and channel mode of the information exchange between the intelligent query device and the electric meter through the transponder, and transform the power line carrier communication channel into an RS485 channel, thereby solving the problem of complicated line laying;

2. The utility model is suitable for ordinary residential users, special transformer users and other electricity consumption information query needs. It changes the passive power consumption of power users into active and orderly power consumption, and provides decision-making basis for users to change the way of power consumption and save users' electricity bills;

3. The utility model can guide users to use electricity at off-peak times according to the power consumption information of the power grid through the intelligent query device, and reduce the line loss of the power grid; and can improve the service quality of power consumption by setting functions such as electricity fee early warning and payment reminder.

Description of drawings

Fig. 1 is a schematic diagram of the utility model electricity inquiry system;

Fig. 2 is a structural schematic diagram of the utility model intelligent query device;

Fig. 3 is a functional block diagram of the utility model intelligent query device;

Fig. 4 is the schematic structural diagram of the transponder of the present invention;

Fig. 5 is a functional block diagram of the transponder of the present invention.

detailed description

In this embodiment, as shown in Figure 1, a query system through two-way interaction between the user and the electricity meter information and grid information includes: multiple intelligent query devices (including power adapters), transponders, multiple smart energy meters and a master station Information broadcasting device; among them, RS485 bus communication is adopted between the smart meter and the repeater; the power line carrier communication is adopted between the repeater and the query device;

The power adapter of the smart interrogator can be plugged into the power socket at any time so that the smart interrogator can be powered on again or activated by the user's key, and then it can communicate with the transponder through the power line. It can convert the user's collection request command into a meter reading signal, and send it to the transponder through the power line carrier; the transponder sends it to the smart energy meter through the RS485 bus according to the user's request command, and is used to quickly read the meter data of the specified smart energy meter. Including: the user's current power consumption, grid power consumption notification and other information; the smart energy meter immediately responds and sends data after receiving the user's data request, so that the original channel of the meter data is fed back to the carrier adapter of the smart queryer for demodulation and display;

The meter data read by the smart queryer mainly includes: the remaining electricity charge of the meter (remaining electricity), the current electricity quantity of the meter, the current price of electricity, the step-by-step electricity price information, the current voltage, the current load, the date and time of the meter, etc. The intelligent queryer periodically reads the voltage, load, and current electricity information of the meter to form a user's electricity consumption curve. The electricity consumption curve can be displayed according to the density of the day, week, and month. If the user's electricity load mostly falls during the peak electricity price period, the user can adjust the working hours of the high-power electrical appliances, and arrange the load as much as possible during the low electricity price period. In this way, the user's electricity bill is saved, and it also has the effect of shifting the peak power consumption of the power grid.

The intelligent query terminal can also send warning information to the user according to the read remaining electricity charge. If the remaining electricity charge exceeds the alarm value, the smart inquirer will send out an audible and visual alarm to urge users to purchase electricity as soon as possible to avoid tripping. Similarly, the intelligent query device reads the user's current monthly electricity consumption for the user as a reference for electricity bill settlement, which improves the service level of electricity consumption.

The transponder uses the public network such as the GPRS channel to wait for the power consumption information sent by the master station information broadcast device through the GPRS antenna, such as maintenance notices, payment notices, power outage notices, electricity bill settlements, etc., and scrolls and stores the master station information in the transponder memory. During the idle period, the electricity consumption information of the grid is broadcast to the smart queryer. When the smart queryer is activated by the user's button, the smart queryer first reads the meter information according to the user's needs, and when the carrier channel communicating with the transponder is free, it reads the power consumption information issued by the master station until all the new information is read out until. If the intelligent interrogator is in the power-off state, after the intelligent interrogator is powered on again, when the carrier channel is idle, the intelligent interrogator actively requests new information in the transponder until all information is read out.

In addition to the above-mentioned active request mode, the smart queryer can also use the silent data capture mode to obtain meter information; the silent data capture mode means that the smart queryer does not initiate carrier communication requests on its own initiative to avoid or reduce power line carrier congestion and collisions, but only The communication data on the carrier channel is monitored by the receiving circuit of the power line carrier module, and if the data contains the required electric meter data information, the data is intercepted, so as to avoid artificial collision of the carrier signal.

After the intelligent query device receives the power consumption information of the main station, such as power outage information and current grid load information, the user can reasonably arrange the power consumption plan according to the received information, especially the power consumption planning and suggestions for the user based on the grid load information , can improve the load rate of the line network from the perspective of the power grid.

For the intelligent query device for specific users, it can be agreed to group the user branch data. According to the group data, the user can clearly understand the power distribution efficiency of each branch, reduce the line loss in a targeted manner, and improve the energy efficiency of the enterprise.

As shown in Figure 2, the intelligent query device is the core device that completes the two-way interactive function, and its composition includes a power adapter, a carrier communication module, a processing unit, a storage unit, a display module (that is, a Chinese character LCD display), a real-time clock RTC and a key module ;

The processing unit obtains the corresponding meter parameters from the memory according to the user request command collected by the key module to form a meter reading command, and the meter reading command is sent to the carrier communication module through the TX pin of the processing unit for modulation; the carrier communication module will modulate After the meter reading command is processed by the coupling filter circuit, it is transmitted to the transponder through the power line carrier channel;

The carrier communication module receives the meter data fed back by the transponder and demodulates it through the coupling filter circuit to obtain the meter information, and the meter information is sent to the processing unit through the RX pin of the processing unit; the processing unit sends the meter information to the storage unit for updating The current data of the electric meter is read, and the corresponding electric meter data is read from the storage unit and sent to the display unit for display.

The corresponding data flow is:

① User button request;

②The processor fetches the meter parameters from the memory to form a meter reading command;

③ The meter reading command is modulated by Tx to the carrier modulation circuit;

④The carrier modulation signal is transmitted to the distribution network through the coupler, and then transmitted to the transponder by the distribution network, that is, the power line carrier channel;

⑤ After the transponder reads the meter successfully, it transmits the meter information from the distribution network back to the coupling circuit;

⑥ The meter information is sent to the carrier demodulation circuit through coupling filtering, and the restored meter information is sent back to the processor;

⑦ The meter information is deframed by the processor, and the meter data is obtained and stored in the memory, and the current data of the meter is refreshed;

⑧The processor takes out the data in the memory, and displays it on the LCD screen after passing through the driving circuit;

⑨The processor reads out the RTC clock, and if it enters the alarm period, reads the meter data from the memory, and determines the alarm type and alarm voice;

⑩If the alarm condition is satisfied, according to the determined alarm result, drive the buzzer or loudspeaker to alarm. Otherwise, cancel the alert.

In fact, the event that initiates the meter reading task can be the RTC clock hour and the query device being powered on again, in addition to the user pressing a button. Reading the meter is a general term, and remote parameter modification of the meter can also be performed through this link. Reading electricity meter information may also refer to reading notification messages in transponders.

As shown in Figure 3, the user intelligence query device is physically divided into two parts, namely the display and the adapter. The monitor and adapter are connected via a USB connection cable. The adapter provides two functions, one is to provide 5V power for the entire interrogator (including its own carrier circuit); the other is to communicate with the transponder through the power line carrier circuit. The adapter receives the reading instructions from the display through the TX line of the connecting cable, and after carrier modulation, it is coupled to the 220V power line and transmitted to the transponder by the power line. The response signal of the transponder is sent back by the power line, the signal is taken out by the coupler, demodulated by the carrier circuit, restored to the response digital signal, and then returned to the display by the Rx of the connecting cable. The power supply of the display is obtained by connecting the 5V line of the cable.

The display is the main control circuit of the user's intelligent query device, which provides the user with a man-machine interface displayed by buttons, and initiates the meter reading communication according to the user's query operation requirements. After the user presses the button, the display immediately displays information such as the user's current electricity charge (electricity), remaining electricity charge (electricity), and current load. If the user needs to query other information, such as last month's electricity charge (electricity), last month's demand, etc. The screen menu prompts to select the corresponding option. If the user enters the menu, the display will initiate a meter reading query request according to the preset parameters such as the communication address of the meter. The query request is modulated by the carrier circuit of the adapter and coupled to the power line. Forwarder. The transponder forwards the meter reading request received by the carrier channel to the RS485 port, initiates the data reading of the meter, and the meter responds to the data and returns according to the original path. When the query device is powered on again or on the hour, it will automatically initiate the reading of the meter data to refresh the displayed data. Whether it is to query and read the meter by pressing the button, or the query device automatically initiates a refresh display data, if the remaining electricity charge (power) balance of the user's meter is insufficient, the query device will alarm with a buzzer and a display screen. After the user checks the alarm information, the buzzer alarm stops. If the user does not check within 10 seconds, the buzzer will stop reminding within this reminding period.

The function of the transponder is relatively simple, which is to take out the carrier meter reading request data on the power line, and send the request to the meter through the RS485 bus. After the meter responds, the response data of the meter is sent back through the power line. In order to avoid unnecessary occupation of the RS485 bus, the transponder filters the meter reading data on the carrier line, and the transponder only forwards the request of the meter connected to the transponder.

As shown in Figure 4, the transponder circuit is implemented by three circuit boards, which are the main control board, display board and carrier modulation and demodulation circuit board composed of the main control circuit, interface circuit and carrier coupling circuit. The single-chip MCU is the control core of the main control circuit of the repeater. The GPIO port line of the single-chip MCU, the Uart serial port, etc. constitute the communication interaction link of the repeater, and form a complete control circuit with other peripherals of the single-chip microcomputer. The display board has two functions, one is to set and query the communication parameters of the meter connected to the transponder through the infrared port, and the other is to indicate the running status of the transponder through the LED indicator. The LED indicates the running status is very simple, it can be directly driven by the GPIO port.

As shown in Figure 5, the ~220 module is the port connected to the power grid. After the transponder is connected to the AC 220V cable and passes through the voltage stabilizing module circuit, it provides stable working power for the entire transponder. At the same time, after the 220V line passes through the carrier coupling circuit, the phase cable is connected into a carrier communication channel, forming a path with the intelligent interrogator in the power grid. When the transponder is working, the carrier circuit is in the monitoring state, waiting to receive the meter reading request from the queryer. The coupling circuit couples and filters the carrier signal on the 220V line, then transmits it to the carrier demodulation module for demodulation, and demodulates the meter reading request signal. The meter reading request signal enters the MCU through the Uart serial port, and the MCU processing unit identifies whether the request signal belongs to all The connected meter, if yes, sends the meter reading request number through the Tx of Uart serial port 3, and transmits it to the meter through the RS485 bus after passing through the RS485 isolation circuit. The electric meter responds with data after receiving the meter reading request. The meter response data is sent back to the Rx of the Uart serial port 3 after the RS485 bus and the isolation circuit. The MCU sends the meter response data received by the Rx of Uart serial port 3 from the Tx terminal of Uart serial port 2. After carrier modulation coupling, the meter response signal is transmitted to the 220V line, and finally transmitted back to the initiating interrogator.

The working mode of the transponder is as follows:

1. Short message data flow:

① The main station of the system compiles short messages of power consumption information and sends them out through the GPRS channel;

② The G PR S module receives the short message and sends it to the processor through Rx;

③ The processor takes out the short message and stores it in the memory, and responds according to the message sending type. If the short message is in group sending mode, the processor does not organize a response, otherwise it organizes a response;

④A. If the master station sends short messages in group sending mode, the processor will send the received messages to the carrier channel through the Uart1 serial port, and the queryer will receive them;

B. If the short message type is specified to send, such as sending arrears information, the processor first organizes the confirmation frame, and sends it to the GPRS module through the Tx of the Uart3 serial port, and the GPRS returns the response confirmation frame to the master station. Then the message is sent to the distribution network through the carrier channel according to the specified address, and is received by the queryer.

⑤After receiving the short message, the interrogator responds to the confirmation message through the power line carrier channel;

⑥If the confirmation message from the queryer is not received, the transponder sends the short message again and waits for confirmation; if the confirmation message is not received for 3 consecutive times, it stops sending and waits for the queryer to read it later.

2. Carrier channel data request process, as shown in Figure 5:

①The signal from the carrier channel is filtered by the coupling circuit and delivered to the demodulation circuit;

② The demodulated signal is sent to the processor via Rx;

③ The processor identifies the carrier request information type;

4. if the request is a short message query, then take out the short message response from the memory until all the short messages are read;

⑤ If the request is for electricity meter data, the processor compares whether the electricity meter parameters are preset by the transponder;

⑥After the processor organizes the meter data request, it is sent to the RS485 circuit by the Tx of the Uart2 serial port, and uploaded to the RS485 bus after being isolated by RS485;

⑦ The meter receives the data query request from the RS485 bus, responds to the data of the meter, and returns to the Rx terminal of Uart2 through the RS485 circuit;

⑧The processor forwards the meter data received from Uart2 to the Tx terminal of the Uart1 serial port;

⑨The meter data is coupled to the distribution network after carrier modulation;

⑩The response information of the meter is sent back to the queryer through the power line of the distribution network.

3. Infrared channel data flow:

① The infrared receiving tube receives the infrared signal, and after demodulating the information, it is input to the processor by the Rx of the Uart0 serial port;

② The processor identifies the validity of the infrared port information, and if it is valid data, it will be processed according to the corresponding response;

③ If it is a parameter setting, take out the meter parameter and store it in the memory. If it is a query parameter, the corresponding parameter is taken out from the memory to answer;

④ After the processor organizes the response information, it is sent out through the Tx of the Uart0 serial port, and after being driven by infrared modulation, it is sent out by the infrared emission tube.

Claims (5)

1. A two-way interactive and orderly electricity consumption inquiry system is characterized in that it includes: an intelligent inquiry device, a transponder, an intelligent electric energy meter and a master station information broadcasting device; The intelligent queryer is used to collect user request instructions and send them to the transponder through the power line carrier; the transponder obtains the electric meter data of the corresponding smart electric energy meter through the RS485 bus according to the user request instruction; and the electric meter data Feedback to the smart queryer for display; The transponder is also used to receive and store the power consumption information of the grid sent by the information broadcasting device of the master station, and send the power consumption information of the grid to the intelligent queryer in idle time. 2. The two-way interactive orderly electricity consumption query system according to claim 1, wherein the intelligent query device comprises a carrier communication module, a processing unit, a storage unit, a display module and a key module; The processing unit obtains the corresponding electric meter parameters from the memory according to the user request command collected by the key module to form an electric meter reading command, and the electric meter reading command is sent to the electric meter through the TX pin of the processing unit. The carrier communication module performs modulation; the carrier communication module transmits the modulated meter reading command to the transponder through the power line carrier channel after being processed by the coupling filter circuit; The carrier communication module receives the ammeter data fed back by the transponder and performs demodulation processing after passing through the coupling filter circuit to obtain the ammeter information, and the ammeter information is sent to the processing unit through the RX pin of the processing unit; The processing unit sends the electricity meter information to the storage unit for updating the current data of the electricity meter, and reads the corresponding electricity meter data from the storage unit and sends it to the display unit for display. 3. The two-way interactive orderly power consumption query system according to claim 1, characterized in that: the composition of the transponder includes: a main control board, a display board and a main control circuit, an interface circuit and a carrier coupling circuit. Carrier modulation and demodulation circuit; The carrier coupling circuit obtains the user request instruction from the interface circuit and sends it to the carrier modulation and demodulation circuit after coupling and filtering processing for demodulating the meter reading request signal, and the meter reading request signal is sent to the said meter reading request signal through the Uart serial port The main control circuit; the main control circuit identifies whether the request signal belongs to the connected smart energy meter, if so, the request signal is sent to the RS485 bus through the Tx pin of the Uart2 serial port and transmitted to the corresponding smart energy meter The meter is used to obtain the meter data; The Rx pin of the Uart3 serial port of the main control circuit receives the feedback ammeter data and sends it to the carrier modulation and demodulation circuit through the Tx pin of the Uart2 serial port for modulation, then couples to the power line carrier channel for transmission to the smart queryer. 4. The two-way interactive orderly power consumption query system according to claim 3, characterized in that: the composition of the transponder also includes: a GPRS module; The GPRS module sends the power consumption information short message sent by the master station information broadcast device through the GPRS channel to the main control circuit through the RX pin; the main control circuit transmits the power consumption information short message through the Uart The serial port is sent to the carrier channel and received by the intelligent queryer. 5. The two-way interactive orderly electricity consumption query system according to claim 3, wherein the display panel includes an infrared port circuit; The infrared port circuit receives the infrared signal sent by the smart energy meter and obtains the query parameters after demodulation, and the main control circuit receives the query parameters through the Rx pin of the Uart0 serial port, and takes out the corresponding parameters from the memory through The Tx pin of the Uart0 serial port is sent to the smart energy meter.