CN205038775U - Wireless meter reading terminal based on GPRS - Google Patents

Abstract

The utility model discloses a wireless meter reading terminal based on GPRS, which comprises an MCU, a system power supply and a power supply monitoring circuit, a storage module, a switch, a GPRS module, a communication module, a display screen and a keyboard. The communication module communicates bidirectionally with the MCU, The MCU communicates bidirectionally with the storage module, the GPRS module communicates bidirectionally with the MCU by means of a switch, the display screen and the keyboard communicate bidirectionally with the MCU, the communication module is used to connect the multi-functional electric meter, the system power supply and the The monitoring circuit supplies power to the MCU; by using the GPRS module, wireless meter reading is realized on the basis of GPRS as the communication means, and the LPC2138 microprocessor and the MC55 communication module are used as the target hardware, and the AT command is used to complete the communication with the monitoring center. Transmit the meter reading data to the monitoring center to achieve seamless connection, ensure the timeliness and accuracy of meter reading, and avoid the problems of manual meter reading.

Description

Wireless meter reading terminal based on GPRS

technical field

The utility model relates to the technical field of power grid terminal power collection devices, in particular to a GPRS-based wireless meter reading terminal.

Background technique

Electric energy metering is an important link in the modern electric power marketing system. The reading and settlement of the electric power of the drive relies on manual data reading on the spot regularly, which has problems such as low efficiency, high cost, and inability to monitor. For power supply departments and users, Laishui, Manual meter reading charging has always been a big problem. The early meter reading method was manual meter reading by meter readers on site. This manual meter reading method not only has high labor costs, high labor intensity, and single data collection of electricity consumption information. There are also problems such as incomplete meter reading, estimated copying, missing copying, wrong copying, miscalculation and long meter reading cycle.

Based on the disadvantages of manual meter reading mentioned above, the development of remote meter reading technology for electric energy measurement is a need to improve the level of electricity management, and it is also an inevitable trend of the rapid development of network and computer technology, that is, the use of communication and computer network technologies to automatically read And processing meter data, overcoming the low efficiency and uncertainty of the transmission manual meter reading mode, is the problem that needs to be solved in the process of promoting the modernization of electric energy management.

Utility model content

The technical problem to be solved by the utility model is to provide a wireless meter reading terminal based on GPRS. By using the GPRS module, on the basis of using GPRS as the means of communication, wireless meter reading is realized, and the LPC2138 microprocessor and the MC55 communication module are used as The target hardware uses AT commands to complete the communication with the monitoring center and transmit the meter reading data to the monitoring center to achieve seamless connection, ensure the timeliness and accuracy of meter reading, and avoid the problems of manual meter reading.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a wireless meter reading terminal based on GPRS, including MCU, system power supply and power monitoring circuit, storage module, switch, GPRS module, communication module and display screen and keyboard, the communication module communicates bidirectionally with the MCU, the MCU communicates bidirectionally with the storage module, the GPRS module communicates bidirectionally with the MCU by means of a switch, the display screen and the keyboard communicate bidirectionally with the MCU, and the communication module is used to connect The multi-function electric meter, the system power supply and the Xianyuan monitoring circuit supply power to the MCU.

The MCU is LPC2138, the communication module is RS485, the GPRS module is MC55, the storage module includes a FLASH storage module and an E2PROM storage module, and the FLASH storage module and the E2PROM storage module communicate with the LPC2138 bidirectionally respectively.

It also includes a local debugging interface, and the local debugging interface communicates with the switch bidirectionally.

The terminal also includes a system clock and RTC, and the system clock and RTC communicate with the MCU bidirectionally.

The beneficial effects produced by adopting the above-mentioned technical scheme are: by using the GPRS module, on the basis of using GPRS as the means of communication, wireless meter reading is realized, with the LPC2138 microprocessor and the MC55 communication module as the target hardware, using the AT command to complete the communication with The communication of the monitoring center transmits the meter reading data to the monitoring center, realizes seamless connection, ensures the timeliness and accuracy of meter reading, and avoids the problems existing in manual meter reading.

Description of drawings

Fig. 1 is a block diagram of the utility model.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

In order to solve the problems of incomplete meter reading, estimated reading, missed reading, wrong reading, miscalculation and long meter reading cycle in traditional manual meter reading, the utility model provides a wireless reading meter based on GPRS as shown in Figure 1. Table terminal, including MCU, system power supply and power supply monitoring circuit, storage module, switch, GPRS module, communication module and display screen and keyboard, described communication module and MCU two-way communication, described MCU and storage module two-way communication, described GPRS The module communicates bidirectionally with the MCU by means of a switch, the display screen and the keyboard communicate bidirectionally with the MCU, the communication module is used to connect a multi-function meter, the system power supply and the Xianyuan monitoring circuit supply power to the MCU; the MCU is LPC2138, Described communication module is RS485, and described GPRS module is MC55, and described storage module comprises FLASH storage module and E2PROM storage module, and described FLASH storage module and E2PROM storage module communicate with LPC2138 bidirectionally respectively; Also comprise local debugging interface, local debugging The interface communicates bidirectionally with the switch; the terminal also includes a system clock and RTC, and the system clock and RTC communicate bidirectionally with the MCU.

The utility model selects LPC2138 as the main control MCU, uses the 512kFlash and 32kRAM on the chip as the program storage and operation space, the real-time clock on the chip has a measured error within 1s/day, and uses a 32.768kHz crystal oscillator and a 3.3v silver-zinc button battery as an independent Clock source and power supply, used for meter reading time control and real-time time display, an external E2PROMAT24C16 (16Kbit) with 12C interface to store terminal parameters, a piece of FlashAT45DB32 (32Mbit) with SPI interface to store historical data and temporarily store received data during remote software upgrades The new program, the LCD display is used to display the current parameters, real-time status and meter reading data of the terminal, and the display page can be switched and the terminal address can be changed by the case control.

In the specific application process, through the use of GPRS module, on the basis of GPRS as the communication means, wireless meter reading is realized, with LPC2138 microprocessor and MC55 communication module as the target hardware, using AT commands to complete the communication with the monitoring center, Transmit the meter reading data to the monitoring center to achieve seamless connection, ensure the timeliness and accuracy of meter reading, and avoid the problems of manual meter reading.

Claims (1)

1. the Wireless recording meter terminal based on GPRS, it is characterized in that: comprise MCU, system power supply and power supply supervisory circuit, memory module, switch, GPRS module, communication module and display screen and keyboard, described communication module and MCU two-way communication, described MCU and memory module two-way communication, described GPRS module is by means of switch and MCU two-way communication, described display screen and keyboard and MCU two-way communication, described communication module is for connecting multifunction electric meter, and described system power supply and power supply supervisory circuit are that MCU powers; Described MCU is LPC2138, and described communication module is RS485, and described GPRS module is MC55, and described memory module comprises FLASH memory module and E2PROM memory module, described FLASH memory module and E2PROM memory module respectively with LPC2138 two-way communication; Also comprise local debugging interface, local debugging interface communicates with switch two-way; Terminal also comprises system clock and RTC, system clock and RTC and MCU two-way communication; The FlashAT45DB32 that on described LPC2138, also the E2PROMAT24C16 of external a slice 12C interface is used for storage terminal parameter and a slice SPI interface keeps in the new procedures received when being used for store historical data and remote software upgrade.