Accurate V/F converter and interface technology of MCS-51 Single-chip computer
Abstract
In the auto-measure and control system, the voltage singe is often changed into the frequency singe. This article introduces a integrate circuit LM331, which can change the voltage singe into the frequency singe. This integrate circuit has low price, high precision and simple program etc. It also can be used to be priceless A/D(or D/A) in the computer application system. We use it to make up of a part of real time exercitation invariableness temperature tank, which to measure the temperature. At the same time the article also introduces the thermocouple technology, filter circuit, amplifier circuit, accurate V/F converter, single chip microcomputer and keyboard &LED displayer circuit. The article includes the hardware and software design, the emulation of MATLAB. The emphases is on accurate V/F converter and interface technology of MCS-51 Single-chip computer. This design is beneficial to the teachers and students.
Key words: V/F; Interface technology; temperature measurement