Sensor Experimental Computer-aided System

Computer Assisted Instruction (CAI) ,which research and application has been established by National Development and Reform Commision (NDRC), is an important subject of science and technology to overcome. The using of CAI software incarnate the combination of advanced teaching methods and information technology. She meets the demands of teaching reform,playing a great part for educating talents of a new 21th century economy. Sensor experiment is very important in the electronics and information majors.By now students have yet used some line to operate on the experimental instrument.There is nothing else methords to adopt but record data by hand,including voltage , electric current,and wave form,so to obtain some perceptual knowledge.This mode need much time to write down data ,to draw final graph.As a result it is slow.In the processing of some esperiment,because of fault operation or erroneous thoughts,it always happens to destroy the instrument and the impression is discontinuous.The system gives a direct real picture to user to display practical objects-oscilloscope,etc.We can use mouse to connect different node directlyjust like it should be.The lining branch system permits user two selection:automatical mode and artificial mode.After lining the system can examine the correctness to mark out the errorneous line .If all is ok,on the screen will present a dialogue window for certain experiment.There also have plentiful dynamic picture,data display and wave graph.The system contains 15 experiments,based on CSV 10 sensor instrument, integrating objects to measure,all kinds of sensors,the excitation source,and other panels.We can observe the following sensors: effector, temperature, pyroelectric, piezo-electric, capacitance, optical fibre, hall, inductance,electric vortex, magnetic-current,etc.This software also originally introduce speech recognition technology.Based on LPC cepstrum coefficient,HMM model and Viterbi algorithm,there will be a pleasure experience.In this paper ,1 put forward a new original scheme for pronunciation of Chinese and English.This scheme is to give a more scientific limitation for speech recognition unit to heighten effect.There also several port for a real sensor to connect with,and so the system is a vitual instrument(VI) actually.We will develop the detail to fit the new need of the actual expriment...