The Digital Reform Of Spectrometry

Spectrometry is a high-grade instrument in Chemistryanalysis, which is much costly. Spectrometry develope two generation .The firt is analog , that is say, its data is read by pointer. Its precision is still acceptable. But it is difficult to read data. The most discommodiousness is that the data read can't be saved and dealed with. The first is still being used largele. The second generation is digital, which own powerful fuction, especially save and deal with dataconviniencely. If need other fuction, adding a subprogram will suffice.Yet the precision of the first generation is not less than that of the second. Only its fuction is weak .If add a digital interface, it will own all of the fuction of the second, and the cost is much cheaper than buy a ditigal , while make use of the old instrument fully.The market is broadly.This article introduce a system to reform the first generation .After reform the system has achieve its goal, the system adopt automatic technology, communication technology and microcomputer technology to relize the sample , deal with the analog signal. The system is much cheap.Only a piece of circuit diagram with ISA socket and a IBM-PC. Commonly user have IBM-PC, so the cost is only a circuit diagram, worthing 800 yuan perhaps.The system is composed of foregroung computer and background computer. The foreground is in charge of sample, which is made up of ADuc812, AD620 , and so on. The background is in charge of dealing with data , including digital filter, differential, the max, the min, drawing, and so on.The whole system is composed of software and hardward reasonly, and own high ratio between performance and price. It also use easily and work stably. This system take advantage of the high technology to reform the trational industy, while making use of the old instument. So it has much pratically.