Design Of CO Gas Density Detector Based On Short Messages

Air quality effects people's health directly. Nowadays indoor air quality has becomes one of the troubles which more and more evoke the attention of people who are in abroad and inland. CO gas is one of the main contaminations in public room. In order to make environment protection department monitor continuously and measure the CO gas accurately, make CO gas reach national standard we need the instrument.The dissetator brought forward a method to transfer the data by GSM network, and designed the hardware and software. In the traditional microprocessor system, used a GSM module which provided short message service and realized wireless data transfer.This CO gas detector based on short messages can detect CO density fast, realize multi-point measurement online and monitor the measurement equipment remotely. This detector has CO 24 hours mean concentration, 1 hour mean concentration measuring functions, GSM short messages receiving and transmitting function. It will alarm when the CO gas density exceeds the standard value. According to demand it can change monitoring site freely. By replacing different gas sensors it can also be used in other harmful gas online remote measurement system.The main tasks are as follows: Studied the CO gas measurement knowledge and method; designed the detector total scheme, in hardware it accomplished the design of the data collection passage circuit, microprocessor and A/D conversion circuit, power convert management circuit, LCD module interface circuit and GSM communication interface circuit and so on; in software it illustrated the realized course of the main module and each function module, deeply analyzed the GSM network short messages service then wrote the data receiving and...