阅读说明：本技术 一种适用于智能电表的多进制数字有线通信方法 (Multi-system digital wired communication method suitable for intelligent electric meter ) 是由 李建炜 曹献炜 常兴智 王再望 党政军 武晓勇 纳晓文 李晓雄 谭忠 陈良才 马 于 2020-06-17 设计创作，主要内容包括：本发明涉及一种适用于智能电表的多进制数字有线通信方法,包括以下步骤：将原始数字信号中的0、1二进制转换为多进制数据L；对转换后的多进制数据L进行传输。所述多进制数据L由幅值调制数A与脉宽相位调制数B组成,或所述多进制数据L由幅值调制数A与脉宽相位调制数B组成,其中幅值调制数A表示二进制数,脉宽相位调制数B表示二进制或多进制数。本发明采用脉宽相位调制方式实现多进制通信,幅值仅仅采用二进制幅值调制实现,即仅有高电平和低电平,对外界信号干扰的抵抗能力与现有二进制相同；采用脉冲宽度与相位信息构建多进制,比现有脉冲相位调制携带信息量更大,更容易识别。(The invention relates to a multi-system digital wired communication method suitable for an intelligent electric meter, which comprises the following steps: binary system of 0, 1 in the original digital signal is converted into multi-system data L; and transmitting the converted multilevel data L. The multilevel data L is composed of an amplitude modulation number A and a pulse width phase modulation number B, or the multilevel data L is composed of an amplitude modulation number A and a pulse width phase modulation number B, wherein the amplitude modulation number A represents a binary number, and the pulse width phase modulation number B represents a binary number or a multilevel number. The invention adopts a pulse width phase modulation mode to realize multi-system communication, and the amplitude is realized by only adopting binary amplitude modulation, namely, only high level and low level exist, and the resistance to external signal interference is the same as that of the existing binary system; the multilevel system is constructed by adopting the pulse width and the phase information, and compared with the existing pulse phase modulation, the multilevel system has larger information carrying capacity and is easier to identify.)

1. A multi-system digital wired communication method suitable for an intelligent electric meter is characterized by comprising the following steps: the method comprises the following steps:

binary system of 0, 1 in the original digital signal is converted into multi-system data L;

transmitting the converted multilevel data L;

the multilevel data L consists of an amplitude modulation number A and a pulse width phase modulation number B.

2. The multilevel digital wired communication method applicable to the intelligent electric meter according to claim 1, wherein: the multilevel system comprises a quaternary system, a heptaary system and an eleventh system.

3. The multilevel digital wired communication method applicable to the smart meter according to claim 2, wherein: the pulse width and the phase modulation number B are equal, and the phase difference is 90 degrees, 120 degrees or 180 degrees.

4. The multilevel digital wired communication method applied to the intelligent electric meter according to claim 3, wherein: the pulse width ratio of the pulse width phase modulation number B is 2, 3 or 4.

5. The multilevel digital wired communication method applied to the intelligent electric meter according to claim 3, wherein: the amplitude modulation number A comprises a low level and a high level, wherein the amplitude of the low level is 0, the amplitude of the high level is C volt, and C is a real number larger than 1.8.

6. A multi-system digital wired communication method suitable for an intelligent electric meter is characterized by comprising the following steps: the method comprises the following steps:

binary system of 0, 1 in the original digital signal is converted into multi-system data L;

transmitting the converted multilevel data L;

the multilevel data L is composed of an amplitude modulation number a and a pulse width phase modulation number B, wherein the amplitude modulation number a represents a binary number, and the pulse width phase modulation number B represents a binary or multilevel number.

7. The multilevel digital wired communication method applied to the intelligent electric meter according to claim 6, wherein: and detecting the rising edge and the falling edge of the transmitted multilevel data L only at a fixed phase, and determining the width and the phase of the pulse according to the rising edge and the falling edge so as to determine the transmitted multilevel data L.

Technical Field

The invention relates to the technical field of communication transmission, in particular to a multi-system digital wired communication method suitable for an intelligent electric meter.

Background

The current digital wired communication is mainly based on binary system communication, and the requirement of current high communication efficiency is difficult to meet due to low transmission efficiency of binary data. For example, a dedicated device represented by a smart meter has an increasing demand for data communication rate with increasing degree of intelligence, and thus further increase in signal communication rate is required. Most of the commonly used multilevel communication adopts multilevel amplitude modulation, multilevel phase modulation and multilevel frequency modulation methods, and the methods can realize multilevel data communication. The multilevel amplitude modulation is most easily realized, but after the multilevel amplitude modulation is carried out, the probability of data output analysis errors is easily increased due to interference signals caused by the reduction of the level interval between two adjacent numbers. Multilevel phase modulation is a widely adopted approach in the field of wireless communications, where modulation identification is one of the challenges for its application. Because the multilevel frequency modulation is mainly applied to the field of wireless communication and is not applied in the field of wired communication, the binary mode is still widely adopted for digital communication in the current actual wired communication process.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a multilevel digital wired communication method suitable for an intelligent electric meter and improves the anti-interference capability in the multilevel data communication process.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

a multi-system digital wired communication method suitable for a smart electric meter comprises the following steps:

binary system of 0, 1 in the original digital signal is converted into multi-system data L;

transmitting the converted multilevel data L;

the multilevel data L consists of an amplitude modulation number A and a pulse width phase modulation number B.

Further, in order to further improve the present invention, the multilevel includes a quaternary, a heptaary, and an eleventh.

Further, in order to further improve the present invention, the pulse widths of the individual pulses in the pulse width phase modulation number B are equal, and the phase difference is 90 ° or 120 ° or 180 °.

Furthermore, in order to further improve the invention, the pulse width ratio of the pulse width phase modulation number B is 2 or 3 or 4.

Further, to further improve the present invention, the amplitude modulation number a includes a low level and a high level, wherein the low level has an amplitude of 0, the high level has an amplitude of C volts, and C is a real number greater than 1.8. Since the voltage of the conventional chip device is 3.3V or 5V, and the voltage of the general low-voltage chip is 1.8V, the amplitude modulation number a should be larger than 1.8V when it is high.

As another possible implementation manner, a multilevel digital wired communication method suitable for a smart meter comprises the following steps:

binary system of 0, 1 in the original digital signal is converted into multi-system data L;

transmitting the converted multilevel data L;

the multilevel data L is composed of an amplitude modulation number a and a pulse width phase modulation number B, wherein the amplitude modulation number a represents a binary number, and the pulse width phase modulation number B represents a binary or multilevel number.

Furthermore, in order to further improve the present invention, the transmitted multilevel data L is detected only at a fixed phase, and the width of the pulse and the phase of the pulse are determined according to the rising edge and the falling edge, thereby determining the transmitted multilevel data L.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts a pulse width phase modulation mode to realize multi-system communication, the amplitude is realized by only adopting binary amplitude modulation, namely, only high level and low level exist, the level interval is the same as that of the existing two-level system, so the resistance to external signal interference is the same as that of the existing binary digital communication; the pulse width and phase information are adopted to construct a multilevel system, and the phase interval is larger than that of the existing pulse phase modulation under the condition of the same system; meanwhile, the 0 level pulse also represents a multilevel number, so that the information carrying capacity is larger than that of the existing multilevel pulse phase modulation. Finally, in the digital communication process, the data represented by the multilevel system can be identified only by detecting the pulse phase and the pulse width, so that the identification process of the digital multilevel system data is simplified.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a flow chart of a multilevel digital wired communication method of the present invention;

FIG. 2 is a diagram of a carrier waveform after conversion to quaternary according to the present invention;

FIG. 3 is a diagram of a carrier waveform after being converted to a seven-ary system according to the present invention;

FIG. 4 is a diagram of a carrier waveform after conversion to the eleventh system in accordance with the present invention;

FIG. 5 is a diagram of an original quaternary carrier waveform;

fig. 6 is a diagram of another carrier waveform converted to quaternary according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "first", "second", and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or implying any actual relationship or order between such entities or operations.