Research On Human Shin Measurement System Based On DSP/BIOS Operating System

Human skin is naturally the internal and external barriers of human body. whether being able to grasp human body enginery change accurately by skin physiology parameter is a significant research problem of medical science domain at present. So it is very important to measure the parameters of human skin and analyse what diseases they possibly have contracted for preventing the diseases early. Now, there are some projects to measure skin's physiological parameter. But, many of them only have simple functions and low integration, which can't realize the overall measure for skin and can't completely deduce the condition of skin aging from them. So, we can't know the health condition and hard to make the scheme of curing the diseases by these parameters.In this thesis, a hardware platform of human skin measurement system is established, which consist of six modules, that is, data acquisition portion(including temperature, humidity and PH value acquisition circuit), data processment portion(including TMS320VC5402 DSP and memories), output channel(USB host/device interface), human-machine communication equipment(including HPI interface, LCD and keyboard), decoding circuit and power circuit. The system can measure and analyse skin physiological parameters.The system transmit the parameters of the temperature, humidity and PH value collected by advanced skin sensor to DSP through I~2C interface for processing, then export the result to the mass-storage or PC through the USB interface. The system access the U-disk through UFI mass storage class specification according to FAT32 file system specification. The specification of the system make sure upgrade easily and portable.An embedded Versatile Real-Time Executive (VRTX) is developed in this system by using DSP/BIOS for TMS320C5000, which is provided by TI. Scheduling of tasks, transferring of semaphores and processing of soft/hard interrupts is completed so that these can improve reliability of system, reduce cost greatly and shorten the period of development. In addition, the thesis does a research on several key technology of DSP programming, especially the software optimizing method and DSP/BIOS optimizing method, which not only determines whether the system can work normally, but also the real-time character. Such debugging course and solutions can offer reference to late research and application of DSP.The research on human skin measurement system based on DSP/BIOS operating system has completed to collect, transmit, process and storage the skin physiological parameters of temperature, humidity and PH value. It is a very important step for the measurement and diagnose in human skin.