本文件描述了用于土方、采矿和道路施工应用的连接设备和移动机器之间的车载J1939通信接口，以实现ISO？21815-1中定义的基于SAE J1939协议的干预性避碰行动。该接口旨在由独立于原始机器集成的防撞系统（CAS）设备使用，该设备提供干预信号，以减慢、停止或防止机器运动。 本文件定义的协议也可用于为碰撞警告系统（CWS）提供输入信息。 本文档不适用于计算机上CAS或CWS的即插即用实现。本文件中未完全描述的其他细节可由CAS或CWS制造商与机器制造商协商，以实现功能。 本文件不排除机器制造商或CxD制造商开发替代产品的可能性- 电路板通信接口。

This document describes the on-board J1939 communication interface between a connected device and mobile machines for use in earth-moving, mining and road construction applications to enable interventional collision avoidance actions defined in ISO 21815-1 based on the SAE J1939 protocol. This interface is intended for use by a collision avoidance system (CAS) device integrated independently from the original machine providing intervention signals to slow down, stop or prevent motion of the machine. The protocol defined by this document can also be used to provide input information for a collision warning system (CWS). This document is not intended for plug-and-play implementation of CAS or CWS on the machine. Additional details not fully described in this document can be negotiated by the CAS or CWS manufacturer and the machine manufacturer to enable functionality. This document does not preclude the possibility of the machine manufacturer or the CxD manufacturer developing alternative on-board communication interfaces.