Construction And Application Of Multi-parameter Fusion Ultrasonic Detection And Control Platform Based On System Integration Technology

In the study of the biological effects of the interaction between ultrasound and muscle tissue,in addition to the precise adjustment of the ultrasound sound field,the physical and physiological characteristics of muscles also need to be detected.The required equipment requires not only a multi-channel excitation source with a complex ultrasonic control mode,but also a synchronous acquisition function of the ultrasonic image,ultrasonic radio frequency,ultrasonic elasticity,surface EMG,body surface temperature and other signals in the detection mode,as well as the overall data comprehensive processing and analysis capabilities.If these different types of equipment are used alone in the study,it is not only necessary to consider the modulation of the excitation signal,but also to consider the timing coordination of the acquisition of different signals,as well as the evaluation and analysis of signals and images.The cooperative work of the equipment is very difficult.Based on system integration technology,this article integrates ultrasonic excitation equipment,ultrasonic testing equipment,surface EMG testing equipment and temperature testing equipment into a unified system.Managed by the host computer,various devices work in an orderly manner under the coordination of synchronous signals,and comprehensively process and analyze the signals.At the same time,the integrated system also has equipment expansion functions,providing important system equipment support for research work.The main work of this article includes:(1)The overall design of the system:analyze the requirements of system integration,determine the architecture and topology,select the hardware and software used for integration,form an integration plan,and evaluate and simulate the plan.(2)Integrated communication according to the different protocols used by each device:the ultrasonic excitation device is designed based on the ARM+FPGA framework,and the Lwip network communication protocol is transplanted in the ARM embedded in the FreeRTOS operating system to realize the data interaction of the TCP transmission protocol;the ultrasonic testing equipment communicates with the host computer through the TCP/IP network communication protocol;the surface EMG detection device communicates with the host computer through the Bluetooth protocol;the temperature detection device establishes communication with the host computer through the 1-wire bus protocol.ultrasonic testing equipment and ultrasonic excitation equipment are connected to the system bus through a network port wiring circuit;surface electromyography and temperature testing equipment are connected to the system bus through a USB interface circuit.Integrated interface:Combine the host computer driver,Bluetooth protocol application class,TCP/IP socket(Socket),device initialization timing,device read and write time slot,device instructions,etc.to design the function functions of each device,and use C language to package into dynamic Link library.(3)Overall platform integration:the host computer performs overall design based on labVIEW,uses the"call library function node" to call the dynamic link library to design the ultrasonic detection system,surface EMG detection system and temperature detection system;the TCP library function is used to design the ultrasonic excitation system Client.Design each system as a sub-VI,and finally realize the platform integration by calling the sub-VI.Use the ultrasonic detection and control platform to detect muscle tissue,collect ultrasound images,ultrasound radio frequency signals,surface EMG signals,and body surface temperature.The experimental results show that the platform realizes the synchronous acquisition of signals and the regulation of ultrasonic sound field.(4)The ultrasound image and radio frequency signal acquisition subsystem of this platform is used in the "90-day head-down bed test" conducted by the Shenzhen Lvhang Interstellar Space Research Institute.Collect radio frequency signals synchronized with ultrasonic signals for spectrum analysis,count the peak frequency of volunteers,and study the ultrasonic spectrum law of muscle changes with the degree of atrophy.