摘要
数据传输的可靠性和稳定性在地震测井应用中是至关重要的。结合VSP多节点主从模式的传输特征,设计了基于高速RS485总线的并联传输网络,采用环形缓冲技术实现采样节点对总线通信数据包的侦测,并利用控制器内部的硬件定时器及系统参数,配合自定义数据包完成具有应答环节的点对点广播通信协议设计,从而实现整个VSP系统的可靠控制和稳定数据传输以及节点的自由裁剪。实际野外测试中,在2 Mbps通信速率和100 m的电缆长度的条件下仍无误码和误操作。
The reliability and Stability of data transmission is very important in seismic logging applications.Combination with the transmission characteristics of VSP multi-node Master-slave mode,devise a parallel transmission network which is based on high-speed RS485 bus,use the ring buffer technology to achieve the detection of sampling node to the communication bus.In order to make the entire VSP communication system reliable either in control or data transmission and the node＇ s liberal cropping,also devise point-to-point radio communication protocol with custom packet and response link.Actual field tests show that under the condition of 2 Mbps rate and 100 m length of cable,there＇ s still no bit error and erroneous operation.
出处
《科学技术与工程》
北大核心
2013年第29期8781-8785,共5页
Science Technology and Engineering
基金
国家自然科学基金重大科研仪器设备研制专项(41227802)
国家杰出青年基金(41025015)资助
