Research On Distributed Measurement And Control Node Architecture Of Logging Tools Test-bench Based On Wireless Internet

The fifth generation logging data acquisition system based on Internet technology is the application of the rapid development of Internet technology in the logging industry,in order to achieve rapid,reliable and real-time information sharing.This paper adopts IEEE802.11 protocol to build a distributed wireless local area network based on master-slave architecture.The system is specifically composed of a distributed sub-node as a client and a host as a server.Front-end computer based on STM32F429(CortexM4)+uC/OS-III test-bench platform,hardware and software framework design of function nodes based on Ai ESP8266 module and CortexM4 processor are completed: mainly includes the transplantation of uC/OS-III operating system,data collection tasks,data upload tasks,receiving host command tasks,and three semaphores are created according to system functional requirements,customizing master-slave communication protocol,serial port interrupt reception protocol and timer timing interrupt protocol,accomplished the driver design of ADC+DMA data acquisition and transmission module,memory management module,ESP8266 module and LCD interpersonal interaction module.Distributed slaves connect to the host through wireless router DHCP(this paper uses DHCP)or static IP.The host as a server uses MFC-based object-oriented programming to build,accomplished client IP dynamic management(dynamic management of 10 child nodes),working parameter settings,real-time display of uploaded data,file storage and other functions,adapting the completion port model to realize the network communication function with the front-end computer.The joint test between the host and the three distributed sub-nodes was completed.The test results showed that the system functions meet the design requirements.