Research On USB3.0 Based Acoustic Logging Debugging Interface

With the continuous development of petroleum logging instruments,the detection characteristics of new acoustic logging instruments in three-dimensional space have also been significantly improved.In order to achieve three-dimensional imaging downhole,this type of instrument must collect all the signals output by the receiving transducer in parallel,and the acquisition depth is much greater than that of conventional acoustic logging.Therefore,the collection of downhole instruments generates a large amount of data.Downhole mass data is quickly uploaded to the main control computer,at the same time,in order to meet the characteristics of the data of the sonic logging while drilling is stored in the internal memory of the downhole tool and to overcome the logging telemetry system can not real-time imaging sonic logging tool data Transmission requires the use of a special high-speed data reading interface to transfer data to the host computer.The realization of these functions places high demands on the transmission speed of the interface and the convenience of on-site use.The USB3.0 interface has a high transmission rate,reliability,and ease of use.It is a better solution to apply real-time highspeed data transmission based on FPGA(Field Programmable Gate Array)and USB3.0ultra-high-speed interface to the sonic logging debugging interface.According to the characteristics of ultra-high-speed real-time transmission,by using FPGA as the core control chip and USB3.0 chip as the data transmission bridge to coordinate and coordinate with each other,to achieve large-scale data transmission,and the host computer to achieve data storage and processing,waveform display and other functions The overall system design adopts the idea of first hardware design and then software programming,and tests the transmission rate and data bidirectional communication of the designed USB3.0 interface.In the hardware design part,the Cyclone IV E series FPGA of Altera Corporation is used as the system control chip.While it has a differential high-speed interface and a parallel expansion interface,it is compatible with traditional logging instrument interfaces such as CAN interface and RS485 interface.The company's integrated USB3.0chip is used as a high-speed data transmission interface,and a high-speed AD acquisition module is added to complete the circuit design of each module and PCB layout and physical welding of the circuit board.In the system software design,it is mainly divided into three parts: FPGA logic function programming,USB3.0 firmware programming and host computer software programming.Based on the development of the NIOS system in FPGA,the design of the CAN bus interface is completed,and the state machine is used to complete the timing control of the Slave Fifo interface connected to the USB3.0 chip.Complete the firmware program design and development of the USB3.0 chip on the Eclipse development platform,and complete the development and design of the firmware program header file in the GPIF Designer auxiliary design software.The host computer software is designed through the MFC architecture,and the design of functions such as enumeration,data reading,data storage,waveform display,and command issuance of USB3.0 devices is completed using multi-thread development.All modules of the system are working normally.The USB3.0 rate test is stable at350MB/s.The hardware design includes high-speed external interfaces and traditional logging instrument interfaces to expand the application range.The host computer software implements functions such as saving uploaded data and waveform drawing From the test results,the USB 3.0 interface board performs well and can meet the actual requirements of sonic logging instrument testing.