Bus expansion module of engineering machinery vehicle and bus data processing method

Abstract

The invention discloses a bus expansion module of an engineering machinery vehicle and a bus data processing method, relates to the field of engineering machinery and aims to solve the problems that an existing controller is expensive, large in size and high in workload of wiring and routing and the number of points cannot meet the requirements in the prior art. The bus expansion module comprises a single-chip microcomputer, a voltage stabilizing power source module, an ID (identity)and Baud rate setting circuit, a DI (discrete input) circuit, an AI (analog input) circuit, a DO (discrete output) circuit and a CAN (controller area network) bus communication circuit, wherein the voltage stabilizing power source module, the ID and Baud rate setting circuit, the DI circuit, the AI circuit, the DO circuit and the CAN bus communication unit are respectively connected with the single-chip microcomputer. The bus data processing method includes interrupting a starting timer 0; monitoring data on a bus in a main program, outputting corresponding control signals by the bus expansion module when information controlling the output of the bus expansion module exists; acquiring DI signals and AI signals in an interruption program of the timer 0, processing the signals and transmitting at the preset intervals. An electrical system of the vehicle is simplified, wiring and routing workload is alleviated, space is saved and equipment cost is reduced.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a CAN bus expansion module of an engineering machinery vehicle and a method for processing bus data. Background technique [0002] In the current construction machinery vehicle industry, various electronic control systems have been developed due to the requirements for safety, comfort, convenience, low pollution, and low cost. Since the data types used for communication between these systems and the requirements for reliability are not the same, there are many cases composed of multiple buses, and the number of wiring harnesses also increases accordingly. In order to meet the needs of reducing the number of wiring harnesses and carrying out high-speed communication of large amounts of data through multiple LANs, in 1986 the German electrical company Bosch developed the CAN communication protocol for automobiles. Now CAN's high performance and reliability have been recognized...

AI Technical Summary

Problems solved by technology

[0008] The invention provides a CAN bus expansion module of construction machinery vehicles and a method for processing bus data, which are used to solve the problem that the controllers used in the prior art are expensive, bulky, have a large workload of wiring and routing, and the number of points cannot meet the requirements of use. The problem

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