An ARM-based debugging system for multipole array acoustic logging tools

This paper presents a debugging system for multi-pole array acoustic logging （MPAL） tools. The debugging system proposed in this study can debug the MPAL tool system, sub-system and local electronics. In the test equipment, we have used principal and subordinate structures, and interconnected the host computer and the front-end machine via Ethernet. The front-end machine is based on the ARM7 （advanced reduced instruction set computing （RISC） machine） technique, the processor of which runs an embedded operating system, namely, uClinux OS. We have analyzed the system telecommunication, human-machine interface circuit, transmitter mandrel interface circuit, receiver mandrel interface circuit, and board-level test interface circuit. The software used in the system consists of the embedded front-computer software and the host application software. We have explained in detail the flow chart of the boot loader in the embedded front-computer software. The host application software is composed of four application subroutines, which match with the functional modules of the system hardware. A net communication program based on the server^client mode is implemented by means of socket programming and multi-thread programming. Test results indicate that the data transmission rate of the system is higher than 1 MB/s, which completely meets the current requirements of the data transmission rate between the tool system and the wireline telemetry device. Application of the debugging system, which includes multiple level test methods, shows that the proposed system can fully meet the test requirements of MPAL at various levels.

Development of a novel MLS controller based on embedde d ARM

The controller plays an important rol e in microwave landing system(MLS) navigation equipment.The embedded advanced reduced-instruction-set-computing(RISC) machine(ARM) is introduced to de velop a new MLS controller based on the functional requirements.A design includ ing hardware and software of an ARM system is given.The hardware design involve s a ARM smallest system and its interface.μC/OS-II,a good real-time operating system(RTOS),is i ntroduced in the software design.The task partitioning and management are also i nvolved.The experimental results demonstrate that the embedded ARM technique is an effective way in the complex multi-task system,and it meets the high inte gration and real-time processing requirements of the navigation equipment.