Design of gas detection system based on I2C bus
line spirit check-up
Abstract
The paper introduces a gas testing system of high precision controlled by single-chip microcomputer. The system adopts 87C591 as the core chip, and the accesses with I2C bus as peripheral circuits (for example: A/D, D/A commutator, LED displaying chip, data accumulator, etc), collecting the signal of the piping gas’ pressure, temperature and currency. Then the software will charge the data, accomplishing the exact measurement, displaying and recording. The paper expounds the primary principle of I2C serial buses for extending in the field of measuring and controlling by single-chip microcomputer, and the application of the peripheral devices of the I2C bus. And the principle for designing the hardware circuit and the software are detailed discussed.