Temperature Monitoring System Based On ARM And DS18B20

Temperature is one of the most basic environmental parameters and is closely relatedwith our life.Neonatus is most sensitive to the changes of the temperature, especially thesick babies need treatment at a certain temperature.The mainly research content of this thesis is the neonatal warm box, and finishes thetotal design of the temperature monitoring system.The research priority is the temperaturemeasurement, and the thesis also designs temperature monitoring hardware circuit andsoftware based on ARM and DS18B20.The paper establishes the linear regression model of DS18B20according to therequirement of system measuring precision, and uses the least square method to correct themeasurements.It improves the measurement accuracy greatly. The digital filter is the medianvalue average filtering method,and it ensures the reliability of the measurement data.Thepaper designs the intelligent alarm based on the fuzzy theory and makes the equipmentmore intelligent.The paper uses the DS18B20as the temperature gathering unit, and uses the ARMprocesser as the data processing unit.The paper mainly transplants the Linux kernel, writes the characters driver based onthe DS18B20communication protocol, develops data record program, writes PWM controldriver,develops the temperature monitoring interface using Qt designer, transplants Boaserver, develops a CGI program and a HTML monitoring page of the remote temperaturemonitoring.Through binding and testing of the system, the temperature monitoring system canachieve the requirements of the warm box temperature monitoring. This system has manyadvantages, such as simple hardware circuit, high precision, strong anti-interference ability,the network, the intelligent, and it has more competitive advantage than the same type ofproducts.