An ARM-based debugging system for multi-pole array acoustic logging tools

Abstract

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, subsystem 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.

Electrical Interference Simulation and Prediction Model for Acoustoelectric Logging Detector

“…= + 2 1 0.2 l l (10) Analyzing with the model of parallel wires [21], the distributed capacitance per unit In Figure 10, ex1 and C ex2 are the distributed capacitances. C 1 and C 2 are the capacitance between the electrode signal line and the ground line.…”

“…In particular, the formation permeability can be detected directly by acoustoelectric logging, and most logging methods cannot achieve that function. AcoustoElectric Logging Tool 2.0 (AELT 2.0) is a second-generation acoustoelectric logging detector [8][9][10] developed by the Acoustic Logging Laboratory of China University of Petroleum (Beijing).…”

Intelligent Fault-Diagnosis System for Acoustic Logging Tool Based on Multi-Technology Fusion

“…However, such a system has limited diagnostic capability and is inconvenient to expand and upgrade. Ju et al proposed a master-slave debugging system, which is based on Ethernet and embedded technology, to conduct fast and convenient diagnosis for different parts of the logging tool [5,23,24,25]. Their method possesses the advantages of high modularity and strong scalability.…”