Device and method for collinear transmission of two-wire system data/power supply for supplying power for overall intelligent terminal

Abstract

The invention discloses a device and a method for collinear transmission of a two-wire system data / power supply for supplying power for an overall intelligent terminal. The device comprises a plurality of network units which are arranged at different levels, wherein each network unit comprises a host and n extension units which are matched with the host; the host is connected with each of the n extension units through a two-core bus; the functions of supplying power from the host to the n extension units and transmitting data in two ways are realized; n is a natural number. According to the device and the method for the collinear transmission of the two-wire system data / power supply for supplying power for the overall intelligent terminal, the defects that a circuit is complex in structure, liable to damage, low in power supply power, narrow in application range and the like in the prior art are overcome; the aims that the circuit is simple in structure, unlikely to damage and capable of supplying power for the extension units at high power are fulfilled.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a two-wire data / power co-line transmission device and method for power supply of a smart terminal. Background technique [0002] With the development of microelectronics technology, large-capacity, multi-functional, low-power consumption, and small-volume microcomputer systems (referred to as smart terminals) are becoming more and more popular. Data transmission and power supply between two microcomputer systems are particularly important. The early use of RS232 The serial communication system requires at least 3 wires, and can only transmit data, the transmission distance is <15 meters, and the power supply of each terminal must be provided by itself. Later, RS422 (4-wire system) or RS485 (2-wire system) was adopted. Although the transmission distance was extended, it can only transmit data and cannot supply power. The current USB interface can transmit data a...

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Problems solved by technology

[0004]In the 1980s, Texas Instruments Corporation developed the M-BUS bus, which realizes 2-wire data / power co-linear non-polarity transmission, but the power supply is only for extensions The communication interface part is used for the communication interface, the power supply current is less than 1.5mA, and it cannot supply power to the entire extension, and the bus voltage is 24~36V, which cannot meet the application of portable terminals.

[0005]At the beginning of this century, the American Ubiquitous Company developed the C-BUS bus. A 2200uF / 35V large energy storage capacitor (the size of a black date) should be installed on the machine, which cannot meet the needs of terminal miniaturization and high current

[0006] Both of the above two buses use hardware to realize the co-linear transmission of data and power, which only meet the power supply to the communication interface of the extension, and the main power supply of the extension still needs to be solved separately. Moreover, the circuit is complicated, the protection measures are not perfect, the bus is easily damaged by lightning or strong electricity, and it is difficult to embed it in a tiny system

[0007] In the process of realizing the present invention, the inventor found that there are at least defects in the prior art such as complex structure, easy damage and small scope of application

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