| This thesis develops a system that helps parents monitor the temperature of infants remotely. The system continuously monitors the temperature and sounds an alarm when a temperature exceeds a preset threshold. It can recognize a specific temperature rise pattern that could lead to a febrile seizure.;The system includes two modules; the transmitter and the receiver. An 8-bit microcontroller from Microchip controls the operation of both the modules. Body temperature is sensed by an analog or digital temperature sensor at the transmitter. A RF (Radio Frequency) transmitter sends this temperature data at a particular frequency. The RF receiver at the monitoring unit receives the wireless temperature data and displays the result on an LCD. A buzzer in the receiver module sounds an alarm when a temperature exceeds a preset threshold. The temperature sample is converted to display the core body temperature. This conversion is done using the microcontroller.;The design is developed using an analog temperature sensor, Manchester encoder/decoder and a RF transmitter/receiver modules operating at 315 MHz. The temperature received at the monitoring unit is displayed on a computer screen using LabVIEW (Laboratory Visual Instrumentation Engineering Workbench) software.;A Second design is developed to reduce the size and cost of the first design. This design uses a digital temperature sensor and a RF transmitter/receiver operating at 433 MHz. Temperature is displayed using a LCD (Liquid Crystal Display). The number of components is reduced by 40% and the design cost is reduced by 66%. Programming for both designs are done using the Microchip microcontrollers. A freeware package called MPLAB, which includes an assembler, linker, software simulator and debugger, is used to program the microcontrollers.;Testing for the first generation design is done, by using a thermal chamber and LabVIEW. |
