Design Of Display System Of DPV’s Imaging Sonar Based On Cortex-A9

With the continuous development of underwater resources exploration technology,coastal conflicts continuing to increase,countries continue to increase the intensity of underwater equipment researches and development.As the frogs have limited physical fitness,DPV(Driver Propulsion Vehicle)as an underwater equipment has greatly improved the scope of underwater exploration of frogs,Which has become an important equipment to solve the conflict in the country.The equipment is successfully used in underwater archeology,underwater tourism development,underwater operations measurement and other underwater explores.In this paper,the components of the existing helmet color sonar image display system are briefly introduced,and the performance requirements of the sonar image display system of the DPV are put forward.According to these requirements,this paper makes a choice on the existing main chip,and then designs the DPV sonar image display system globality.Secondly,this paper constructs the development environment of the sonar image display system of the DPV.Completed the installation of the cross compiler,boot program U-boot for a brief introduction and according to the development of the IMX6Q platform for transplantation.The Linux kernel was cut and transplanted,the design of the selected LVDS screen driver was transplanted.Again,this article on the IMX6Q hardware platform for hardware PCB design.In order to shorten the R&D cycle of the development of the DPV sonar image display system,this time using the mature IMX6Q core board on the market,the author completes the design of the power supply circuits and the surrounding circuits.This design uses the Altium Designer 14 software to complete this PCB design.Due to the underwater environment,the DPV sonar image display system has strict requirements on power consumption.After the PCB design is completed,the author tests the system power consumption.After static and dynamic testing,the system can work more than four hours,which meets the performance Claim.Finally,the completion of the sonar image display system software design.The author Debugs through a non-standard baud rate of 256000bit/s,using the frame buffer device to achieve the LVDS screen display.For the sonar data received by the serial port,this paper processes the sonar data by the following steps:first FFT transformation the,and then RGB pseudo-color coding processing,and finally interpolation operation.After processing the sonar data,the app displays the sonar data on the screen timely.For different ranges,the author uses different experimental sites to test.Through the use of other interpolation algorithm,we verify the design of the use of image processing transition more delicate,target display clearly.