Electric energy meter of information changing by HFC network and its communication method

An electric energy meter and two-way communication technology, applied in the field of electric energy meter wired communication device manufacturing, can solve the problems of large investment, affecting signal transmission and exchange, large line maintenance cost, etc., achieving good real-time data, wide application range and reliability high effect

Inactive Publication Date: 2006-09-13
JIANGSU LINYANG ENERGY CO LTD
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AI-Extracted Technical Summary

Problems solved by technology

[0002] At present, the automatic meter reading function of the electric energy meter usually adopts dedicated line communication methods such as RS485, that is, the data communication of the electric energy meter is a dedicated line, and the exchange of electricity information between the electric energy meter and the main station is also carried out through the dedicated line communication method. This k...
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Abstract

An electric energy meter utilizing HFC network to carry out information exchange consists of double - way communication circuit, multifunction special integrated circuit or CPU or MCU or DSP data processing controller, electric energy metering circuit, display circuit and power supply circuit. It can utilize HFC as double - way communication media to realize double - way communication between electric energy meter and main station.

Application Domain

Electric signal transmission systemsPower distribution line transmission +1

Technology Topic

Integrated circuitElectric energy +7

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  • Electric energy meter of information changing by HFC network and its communication method
  • Electric energy meter of information changing by HFC network and its communication method

Examples

  • Experimental program(1)

Example Embodiment

[0009] The technical scheme adopted by the present invention is: figure 1 with figure 2 As shown, the communication method of the electric energy meter made by the HFC network, (1) the electric energy signal generated by the electric energy metering circuit in the electric energy meter is input into the multifunctional application specific integrated circuit (or CPU or MCU or DSP) in the electric energy meter for data processing, Storage; (2) The master station exchanges information with the electric energy meter through the HFC network; (3) The executive mechanism of the electric energy meter is controlled by the programming instructions of its own software or controlled by the instructions transmitted by the master station through the HFC network; (4) The electric energy meter is composed of at least a two-way communication circuit, a multifunctional dedicated integrated circuit (or CPU or MCU or DSP), an electric energy metering circuit, a display and a power supply circuit. The data exchange between the electricity consumption information in the electric energy meter and the master station is through the HFC network. The instructions received by the electric energy meter are transmitted by the master station through the HFC network, and the instructions transmitted by the electric energy meter are sent to the master station through the HFC network. The electric energy meter that uses the HFC network to exchange data is composed of at least a two-way communication circuit, a multi-function application specific integrated circuit (or CPU or MCU or DSP), an electric energy measurement circuit, a display and a power circuit. The two-way communication circuit is the analog signal received from the HFC network After being demodulated into a digital signal by QAM demodulation circuit, it is connected to a multi-function application specific integrated circuit (or CPU or MCU or DSP), and the electric energy measurement circuit is connected to the signal interface of the multi-function application specific integrated circuit (or CPU or MCU or DSP). The digital display signal interface of the integrated circuit (or CPU or MCU or DSP) is connected to the signal input end of the display, and the electrical information signal interface is connected to the QAM modulation circuit in the two-way communication circuit. After QAM modulation, the signal is tuned by the two-way tuner Then the signal is sent out through the HFC network. The two-way communication circuit is composed of a QAM modulation circuit, a QAM demodulation circuit and a two-way tuner. The QAM modulation circuit receives electricity information signals from a multi-function application specific integrated circuit (or CPU or MCU or DSP). After QAM modulation, the two-way tuning is performed After being tuned, the signal from the HFC network is received by the QAM demodulation circuit through the two-way tuner, and after QAM demodulation, the signal is sent to the multi-function dedicated integrated circuit (or CPU or MCU or DSP). QAM modulation circuit is composed of serial/parallel conversion circuit, 2 to L level conversion circuit, and pre-modulation LPF circuit; QAM demodulation circuit is composed of parallel/serial conversion circuit, L to 2 level conversion circuit, multilevel conversion circuit, LPF Circuit, timing recovery circuit and carrier recovery circuit. The working principle is as follows: The master station transmits the required electric energy meter operating data and control instructions through the HFC public network. After receiving this instruction, the QAM demodulation circuit in the CATV two-way communication circuit in the electric energy meter demodulates the analog signal to digital After the signal is input to the multi-function application specific integrated circuit (or CPU or MCU or DSP), the software instructions in the multi-function application specific integrated circuit (or CPU or MCU or DSP) will use the electricity stored in the memory according to the received instructions The information is retrieved from the memory, the digital signal is modulated into an analog signal through the QAM modulation circuit according to the instruction, and then it is tuned by the two-way tuner in the CATV two-way communication circuit and then sent through the HFC network. The master station can receive the desired signal through the HFC network. For users who do not operate in accordance with the requirements of the master station, such as arrears, overloads, etc., automatically cut off their power supply through the control mechanism in the energy meter. The electric energy signal generated by the electric energy metering circuit in the electric energy meter is input to the signal input terminal of the multi-functional application specific integrated circuit (or CPU or MCU or DSP), and after processing, it is stored in the memory for retrieval. The function of the display is to display the electricity consumption data related to the operation of the electric energy meter for observation by the user and the main station personnel. The function of the infrared communication port is: it is convenient for the main station personnel to instruct the user information stored in the electric energy meter to display on the screen of the display through infrared remote control. The function of the power circuit is to provide energy for other circuits to ensure their normal operation. The multi-function application specific integrated circuit (or CPU or MCU or DSP) in the electric energy meter includes the reception of power instructions, power detection, period switching, clock adjustment, power operation calculation, storage, and transmission of power data, etc. There is software and is solidified in hardware. This technology is an existing technology and will not be described. The multifunctional application specific integrated circuit (or CPU or MCU or DSP) contains memory, and it can also be connected to an external memory.

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