The Design Of Pulse Testing For Experimental Teaching

Experiment teaching is an important means for training the experimental capacity of college students. With the higher medical education reform deepening, the great changes have taken place in the experimental teaching ideas, concepts and methods. It is requisite to train high-quality medical personnel in the closely related to medical experiments. Based on the inspection at the large number of relevant documents, designed and developed the measurement system. In this paper, the pulse of the pressure sensor outputted is amplified and filtered, so that it can be achieved by depicting ECG.The biggest advantages of the sensor used in the design is that the low- acoustic impedance. Because it is close to the acoustic impedance of water and the muscles of the body, so that there is no need for impedance converter in medical sensors.There are high input impedance and high common mode rejection ratio in amplifier. They are use to overcome the high resistance of the signal source and the frequency interference carried by the body and the common-mode interference of other physiological parameters. To meet different pulse signals of students, the amplifier has big gain range.The high-pass filter and low-pass filter are active filters. Trap circuit is used to filter the frequency interference.Pulse signal is transmitted to the computer with data acquisition and the pulse wave is showed in screen by using VB programming. The tested pulse wave reflects the true characteristics of the pulse of human body accurately. The sampling frequency and magnification and the location of the baseline can be set up at any time. The waveform window full uses of Chinese language interface. It is clear, concise and easy to observe and operate.Pulse testing for experimental teaching is designed for students, but the instrument has potential applications in traditional medicine diagnosis.