A new type of main control system based on DSP+FPGA heterogeneous control technology was designed to meet the control requirements of integrating acoustic wave emission,data acquisition and transmission of low-frequency ultrasonic logging tools.The system used DSP as the main controller,communicated with underground cable through CAN bus,generated control timing according to received instructions,used finite-state machine to complete workflow,and innovatively used a health assessment method based on weighted Mahalanobis distance to evaluate the working status.Using FPGA as the slave controller,the command-data channel independent control method was used to transmit control commands,synchronize acoustic wave excitation and acquisition,and receive data in real-time.Adopting a collaborative communication mechanism based on custom parallel port and dual port RAM to complete data transmission between DSP and FPGA.Using differential transmission to achieve communication with transmission and acquisition system.The test shows that the main control system has a low communication error rate,high real-time control,accurate state assessment,and integrated control capabilities for acoustic wave emission,data acquisition and transmission,meeting the control requirements of low-frequency ultrasonic logging tools.
关键词
低频超声测井仪/DSP+FPGA异构控制/加权马氏距离/协同通信机制
Key words
low frequency ultrasonic logging tool/DSP+FPGA heterogeneous control/weighted Mahalanobis distance/collaborative communication mechanism
维普
万方数据