Communication protocol and an application of ignition drive bus IDBUS

Abstract

The invention discloses a communication protocol and an application of an ignition drive bus IDBUS. The IDBUS structure adopts a non-polar and one-master multi-slave dual-line bus which supports semi-duplex serial asynchronous communication and can supply power. A communication mechanism is defined, downlink signal transmission is realized through differential voltage pulse width modulation, and uplink signal transmission is realized through current pulse width modulation. A frame structure model is constructed, each frame is composed of a plurality of sub-frames, each sub-frame is composed of'a start bit, N information bits, a check bit and an end bit', there are pauses between frames, and the sub-frames are continuously transmitted inside the frames. The frame structure types are specified, the sub-frames include 'instruction sub-frames, data sub-frames, end sub-frames and standard-width sub-frames', and the frame structure types include downlink 'conventional/special/broadcast/standard-width' frames and uplink conventional communication frames. Application examples based on a communication protocol are listed. The anti-jamming performance, the communication safety and reliability and the configuration flexibility of the bus are improved, and the system complexity is reduced. The ignition drive bus IDBUS can be applied to data automatic acquisition and ignition driving scenarios of various passive node instruments.

Description

technical field [0001] The invention relates to the technical field of bus communication, in particular to a communication protocol and application of an ignition drive bus IDBUS. Background technique [0002] The bus is the public communication backbone for transmitting information between various functional components. With the high integration of industrialization and informatization and the development of artificial intelligence technology, bus communication technology has become an indispensable means of communication in industrial equipment. [0003] As a two-wire bus, the MBUS bus is widely used in the occasions of automatic data collection of passive nodes (water meters, gas meters, heat meters, etc.). The selected slave station (Slave) will transmit data to the master station only after the master station (Master) sends an inquiry; the master station uses level signal transmission to the slave station, and the slave station to the master station uses current signal ...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned M-BUS bus modulation method is voltage / current amplitude modulation, common mode additive interference, power fluctuation interference, transmission path attenuation, etc. will reduce the anti-interference ability and communication reliability of the bus communication system; parameters cannot be customized for different communication environments. It is adaptable to configuration and lacks flexibility; the M-BUS bus communication protocol has high requirements on circuit characteristics and is difficult to integrate on a single chip; it is not suitable for use in remote ignition drive application scenarios with very high safety and reliability (such as ignition of civil explosions) application)

Images