Study Of Detection On Cutaneous Record Electrogastrogram

Stomach is the biggest empty apparatus. It is very important in holding, digest and transport. Tummy bug is a familiar disease. So far, usual inspect method to tummy bug are gastro-scope and X-ray's barium meal. But all of these are scathing to patient.The firstly EGG was distilled by W.Alvarez in 1992. Inspect technique of EGG take on simple operation, no hurts, no pains, apply a lot of people, and so on. It also connected with physiology and pathology of stomach, which indirect reflect gastric movement and provide information on diagnosis and therapy of gastric disease. Patient accepts it. It is a important assistant diagnostic tools in gastric disease and can refer to both X-ray's barium meal and gastro-scope. It is a very important function on alimentary canal, pathology, pharmacology, clinics diagnose therapy on gastric disease. Since more than ten years, along with people go deep into the character of EGG research, sensor technique, electrical technique and compute technique apply in medical instrument, it is become to realism to develop EGG detection and analysis.The item is put forward based on condition is viable, mature electrical technique and compute technique are used in design.The system make up with hardware and software. The paper describes each circuit design, SCM, computer soft control, data disposal in detail. Serial communication joint part circuit is designed which based on part of RS-232. It realizes data traffic between SCM and PC which through photoelectrical isolation, and succeeded in data collection, data control, data transmission and signal manage of EGG.During it's develop, OrCAD is be used to simulate in analog circuit. Jointing and debug are carried out in practical circuit after simulation is passed. In the same way, simulation C51 is be used in SCM, the program is input to SCM after simulation is passed. Which improve design efficiency. Further more, several languages are used which program A/D transform, serial communication between SCM and PC, UI and signal dispose.In addition, time-frequency analysis is adopted to EGG which process with FFT, Power-frequency analysis and Wavelet packet analysis. The nice character of wavelet packet time-frequency analysis are be used. EGG noise is removed which improved SNR to EGG.Most of components adopted to are universal. All of them are cheap, and the design has a favorable capability to price. The system passed in debug.